JP7609107B2

Movatterモバイル変換

Info

Publication number: JP7609107B2
Application number: JP2022048960A
Authority: JP
Inventors: 寛史柏木; 裕二西尾
Original assignee: Yokogawa Electric Corp
Current assignee: Yokogawa Electric Corp
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2025-01-07
Anticipated expiration: 2042-03-24
Also published as: JP2023142201A

Description

本開示は基板固定構造に関する。This disclosure relates to a substrate fixing structure.

センサと、センサを実装される基板と、基板を固定される被固定部と、基板の第１主面の第１部分を被固定部に固着する固着部と、を有する基板固定構造が知られている。A substrate fixing structure is known that has a sensor, a substrate on which the sensor is mounted, a fixed portion to which the substrate is fixed, and a fixing portion that fixes a first portion of a first main surface of the substrate to the fixed portion.

例えば特許文献１には、センサと、センサを実装される基板と、基板を固定される被固定部と、基板の第１主面の第１部分（中央部分）を被固定部に固着する固着部と、基板の第１主面の第２部分（外周部分）の裏側部分に接する第１表面と第１表面の裏側の第２表面を有する第１弾性部材と、基板の第１主面の第２部分に接する第３表面と第３表面の裏側の第４表面を有する第２弾性部材と、第１主面に垂直な方向において被固定部に対する位置が規制され、第１弾性部材の第２表面に接する規制部と、を有し、被固定部が、第２弾性部材の第４表面に接する、基板固定構造が記載される。このような構成によれば、基板と被固定部の線膨張係数が相違する場合でも、温度変化時に基板の第１主面の第２部分が第１主面に沿う方向に被固定部に対して相対的に変位できるので基板（及び基板上のセンサ関連の回路部品）に生じる応力を抑制でき、もって、センサの測定精度に対する温度変化の影響を抑制できる。For example,Patent Document 1 describes a substrate fixing structure having a sensor, a substrate on which the sensor is mounted, a fixed portion to which the substrate is fixed, a fixing portion that fixes a first portion (central portion) of a first main surface of the substrate to the fixed portion, a first elastic member having a first surface that contacts a rear portion of a second portion (peripheral portion) of the first main surface of the substrate and a second surface on the rear side of the first surface, a second elastic member having a third surface that contacts the second portion of the first main surface of the substrate and a fourth surface on the rear side of the third surface, and a restricting portion whose position with respect to the fixed portion in a direction perpendicular to the first main surface is restricted and which contacts the second surface of the first elastic member, wherein the fixed portion contacts the fourth surface of the second elastic member. With this configuration, even if the linear expansion coefficients of the substrate and the fixed part are different, the second part of the first main surface of the substrate can be displaced relative to the fixed part in a direction along the first main surface when the temperature changes, so stress generated in the substrate (and the sensor-related circuit components on the substrate) can be suppressed, thereby suppressing the effect of temperature changes on the measurement accuracy of the sensor.

特開２００６－２０８０７８号公報JP 2006-208078 A

しかし、特許文献１に記載されるような構成の基板固定構造は、被固定部への基板の位置決め精度に改善の余地がある。However, the substrate fixing structure described inPatent Document 1 leaves room for improvement in terms of the positioning accuracy of the substrate relative to the fixed portion.

本開示の目的は、被固定部への基板の位置決め精度を改善できる基板固定構造を提供することにある。The objective of this disclosure is to provide a substrate fixing structure that can improve the positioning accuracy of the substrate to the fixed portion.

幾つかの実施形態において、基板固定構造は、センサと、前記センサを実装される基板と、前記基板を固定される被固定部と、前記基板の第１主面の第１部分を前記被固定部に固着する固着部と、前記基板の前記第１主面の第２部分の裏側部分に接する第１表面と第１表面の裏側の第２表面を有する弾性部材と、前記第１主面に垂直な方向において前記被固定部に対する位置が規制され、前記弾性部材の前記第２表面に接する規制部と、を有し、前記被固定部が、前記基板の前記第１主面の前記第２部分に固着されずに接する、基板固定構造である。このような構成によれば、被固定部が基板の第１主面の第２部分に固着されないことにより、基板と被固定部の線膨張係数が相違する場合でも、温度変化時に基板の第１主面の第２部分が第１主面に沿う方向に被固定部に対して相対的に変位できるので基板（及び基板上のセンサ関連の回路部品）に生じる応力を抑制でき、もって、センサの測定精度に対する温度変化の影響を抑制できる。また、被固定部が基板の第１主面の第２部分に接することにより、第１主面に垂直な方向における被固定部への基板の位置決め精度を改善できる。In some embodiments, the substrate fixing structure includes a sensor, a substrate on which the sensor is mounted, a fixed portion to which the substrate is fixed, a fixing portion for fixing a first portion of the first main surface of the substrate to the fixed portion, an elastic member having a first surface in contact with a back portion of the second portion of the first main surface of the substrate and a second surface on the back side of the first surface, and a restricting portion that is in contact with the second surface of the elastic member and whose position relative to the fixed portion in a direction perpendicular to the first main surface is restricted, and the fixed portion is in contact with the second portion of the first main surface of the substrate without being fixed to it. According to this configuration, since the fixed portion is not fixed to the second portion of the first main surface of the substrate, even if the linear expansion coefficients of the substrate and the fixed portion differ, the second portion of the first main surface of the substrate can be displaced relative to the fixed portion in a direction along the first main surface when the temperature changes, so that the stress generated in the substrate (and the sensor-related circuit components on the substrate) can be suppressed, and the effect of temperature changes on the measurement accuracy of the sensor can be suppressed. Furthermore, by having the fixed part contact the second portion of the first main surface of the substrate, the positioning accuracy of the substrate relative to the fixed part in a direction perpendicular to the first main surface can be improved.

一実施形態において、基板固定構造は、前記第１部分が、前記第１主面に沿う第１方向において前記基板の一端部に位置し、前記第２部分が、前記第１方向において前記基板の他端部に位置し、前記センサが、前記第１方向における前記基板の前記一端部と前記他端部との間に位置する、基板固定構造である。このような構成によれば、センサの測定精度に対する温度変化の影響を抑制できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the first portion is located at one end of the substrate in a first direction along the first main surface, the second portion is located at the other end of the substrate in the first direction, and the sensor is located between the one end and the other end of the substrate in the first direction. With this configuration, the effect of temperature changes on the measurement accuracy of the sensor can be suppressed.

一実施形態において、基板固定構造は、前記被固定部が、前記基板を前記第１主面に沿う方向に位置決めするように前記基板に接する第１位置決め部を有する、基板固定構造である。このような構成によれば、被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the fixed portion has a first positioning portion that contacts the substrate so as to position the substrate in a direction along the first main surface. With this configuration, it is possible to improve the positioning accuracy of the substrate to the fixed portion.

一実施形態において、基板固定構造は、前記第１位置決め部が、前記基板を前記第１方向に位置決めする、基板固定構造である。このような構成によれば、被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the first positioning portion positions the substrate in the first direction. With this configuration, the positioning accuracy of the substrate to the fixed portion can be improved.

一実施形態において、基板固定構造は、前記第１位置決め部が、前記基板の側面に接することで前記基板を位置決めする、基板固定構造である。このような構成によれば、簡単な構造によって被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the first positioning portion contacts the side surface of the substrate to position the substrate. With this configuration, the positioning accuracy of the substrate to the fixed portion can be improved with a simple structure.

一実施形態において、基板固定構造は、前記第１位置決め部が、前記基板に設けられる穴の側面に接することで前記基板を位置決めする、基板固定構造である。このような構成によれば、簡単な構造によって被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the first positioning portion contacts the side of a hole provided in the substrate to position the substrate. With this configuration, the positioning accuracy of the substrate to the fixed portion can be improved with a simple structure.

一実施形態において、基板固定構造は、前記被固定部が、前記第１主面に沿い前記第１方向に垂直な第２方向に前記基板を位置決めする第２位置決め部を有する、基板固定構造である。このような構成によれば、被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the fixed portion has a second positioning portion that positions the substrate in a second direction perpendicular to the first direction along the first main surface. With this configuration, it is possible to improve the positioning accuracy of the substrate to the fixed portion.

一実施形態において、基板固定構造は、前記第２位置決め部が、前記基板の側面に接することで前記基板を位置決めする、基板固定構造である。このような構成によれば、簡単な構造によって被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the second positioning portion contacts the side surface of the substrate to position the substrate. With this configuration, the positioning accuracy of the substrate to the fixed portion can be improved with a simple structure.

一実施形態において、基板固定構造は、前記第２位置決め部が、前記基板に設けられる前記第１方向に細長い長穴の側面に接することで前記基板を位置決めする、基板固定構造である。このような構成によれば、簡単な構造によって被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the second positioning portion contacts the side of a long hole that is elongated in the first direction and provided in the substrate, thereby positioning the substrate. With this configuration, the positioning accuracy of the substrate to the fixed portion can be improved with a simple structure.

一実施形態において、基板固定構造は、前記第２位置決め部が、少なくとも前記基板における前記第１方向の前記他端側の部分を位置決めする、基板固定構造である。このような構成によれば、被固定部への基板の位置決め精度を向上できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the second positioning portion positions at least the portion of the substrate on the other end side in the first direction. With this configuration, it is possible to improve the positioning accuracy of the substrate to the fixed portion.

一実施形態において、基板固定構造は、前記固着部が、基板と被固定部を締結するボルト又はリベットなどの締結具によって形成される、基板固定構造である。このような構成によれば、固着部を簡単に形成できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the fastening portion is formed by a fastener such as a bolt or rivet that fastens the substrate and the fixed portion. With this configuration, the fastening portion can be easily formed.

一実施形態において、基板固定構造は、前記固着部が接着部又は溶着部によって形成される、基板固定構造である。このような構成によれば、固着部を簡単に形成できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the fixing portion is formed by an adhesive portion or a welded portion. With this configuration, the fixing portion can be easily formed.

一実施形態において、基板固定構造は、前記第１位置決め部が凸状をなす、基板固定構造である。このような構成によれば、第１位置決め部を簡単に形成できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the first positioning portion is convex. With this configuration, the first positioning portion can be easily formed.

一実施形態において、基板固定構造は、前記第２位置決め部が凸状をなす、基板固定構造である。このような構成によれば、第２位置決め部を簡単に形成できる。In one embodiment, the substrate fixing structure is a substrate fixing structure in which the second positioning portion is convex. With this configuration, the second positioning portion can be easily formed.

本開示によれば、被固定部への基板の位置決め精度を改善できる基板固定構造を提供することができる。The present disclosure provides a substrate fixing structure that can improve the positioning accuracy of the substrate relative to the fixed portion.

第１参考例に係る基板固定構造を示す斜視図である。FIG. 1 is a perspective view showing a substrate fixing structure according to a first reference example.第２参考例に係る基板固定構造を示す斜視図である。FIG. 11 is a perspective view showing a substrate fixing structure according to a second reference example.第１実施形態に係る基板固定構造を示す斜視図である。1 is a perspective view showing a substrate fixing structure according to a first embodiment;図３に示す基板固定構造の上面図であり、規制部を省略して示す。4 is a top view of the substrate fixing structure shown in FIG. 3, with the restricting portion omitted.図４のＡ－Ａ線に沿って示す一部断面側面図であり、規制部も示す。FIG. 5 is a partial cross-sectional side view taken along line AA in FIG. 4, and also shows the restricting portion.第２実施形態に係る基板固定構造を示す斜視図である。FIG. 11 is a perspective view showing a substrate fixing structure according to a second embodiment.

以下、図面を参照して本開示の実施形態を詳細に例示説明する。Embodiments of the present disclosure are described in detail below with reference to the drawings.

実施形態を説明する前に、まず第１参考例について説明する。Before describing the embodiment, we will first describe the first reference example.

図１に示す第１参考例に係る基板固定構造１は、センサ２と、センサ２を実装される基板３と、基板３を固定される被固定部４と、基板３の第１主面３ａの第１部分５を被固定部４に固着する第１固着部６ａと、基板３の第１主面３ａの第２部分７を被固定部４に固着する第２固着部６ｂと、基板３の第１主面３ａの第３部分８を被固定部４に固着する第３固着部６ｃと、基板３の第１主面３ａの第４部分９を被固定部４に固着する第４固着部６ｄと、を有する。Thesubstrate fixing structure 1 according to the first reference example shown in FIG. 1 includes asensor 2, asubstrate 3 on which thesensor 2 is mounted, afixed portion 4 to which thesubstrate 3 is fixed, afirst fixing portion 6a that fixes afirst portion 5 of the firstmain surface 3a of thesubstrate 3 to thefixed portion 4, asecond fixing portion 6b that fixes asecond portion 7 of the firstmain surface 3a of thesubstrate 3 to thefixed portion 4, athird fixing portion 6c that fixes a third portion 8 of the firstmain surface 3a of thesubstrate 3 to the fixedportion 4, and afourth fixing portion 6d that fixes a fourth portion 9 of the firstmain surface 3a of thesubstrate 3 to thefixed portion 4.

第１部分５と第３部分８は、第１主面３ａに沿う第１方向Ｄ１において基板３の一端部３ｂに位置し、第２部分７と第４部分９は、第１方向Ｄ１において基板３の他端部３ｃに位置し、センサ２は、第１方向Ｄ１における基板３の一端部３ｂと他端部３ｃとの間に位置する。Thefirst portion 5 and the third portion 8 are located at oneend 3b of thesubstrate 3 in the first direction D1 along the firstmain surface 3a, thesecond portion 7 and the fourth portion 9 are located at theother end 3c of thesubstrate 3 in the first direction D1, and thesensor 2 is located between the oneend 3b and theother end 3c of thesubstrate 3 in the first direction D1.

第１部分５と第２部分７は、第１主面３ａに沿い第１方向Ｄ１に垂直な第２方向Ｄ２において基板３の一端部３ｄに位置し、第３部分８と第４部分９は、第２方向Ｄ２において基板３の他端部３ｅに位置し、センサ２は、第２方向Ｄ２における基板３の一端部３ｄと他端部３ｅとの間に位置する。Thefirst portion 5 and thesecond portion 7 are located at oneend 3d of thesubstrate 3 in the second direction D2 perpendicular to the first direction D1 along the firstmain surface 3a, the third portion 8 and the fourth portion 9 are located at theother end 3e of thesubstrate 3 in the second direction D2, and thesensor 2 is located between the oneend 3d and theother end 3e of thesubstrate 3 in the second direction D2.

第１固着部６ａ、第２固着部６ｂ、第３固着部６ｃ及び第４固着部６ｄはそれぞれ、基板３と被固定部４を締結する締結具１０によって形成される。なお、図１は締結具１０を締結する前の状態を示す。Thefirst fixing portion 6a, thesecond fixing portion 6b, thethird fixing portion 6c, and thefourth fixing portion 6d are each formed by afastener 10 that fastens thesubstrate 3 and the fixedportion 4. Note that FIG. 1 shows the state before thefastener 10 is fastened.

本参考例の構成によると、基板３と被固定部４の線膨張係数が相違する場合、温度変化時に、第１方向Ｄ１における一端部３ｂと他端部３ｃとの間で第１方向Ｄ１の応力が、また第２方向Ｄ２における一端部３ｄと他端部３ｅとの間で第２方向Ｄ２の応力が、基板３（及び基板３上のセンサ２関連の回路部品）に生じる。このため、温度変化がセンサ２の測定精度に影響し易い。According to the configuration of this reference example, if the linear expansion coefficients of thesubstrate 3 and thefixed portion 4 are different, stress in the first direction D1 occurs between oneend 3b and theother end 3c in the first direction D1, and stress in the second direction D2 occurs between oneend 3d and theother end 3e in the second direction D2 in the substrate 3 (and the circuit components related to thesensor 2 on the substrate 3) during temperature changes. For this reason, temperature changes are likely to affect the measurement accuracy of thesensor 2.

次に、第２参考例について説明する。Next, we will explain the second reference example.

図２に示す第２参考例に係る基板固定構造１は、センサ２と、センサ２を実装される基板３と、基板３を固定される被固定部４と、基板３の第１主面３ａの全体を被固定部４に固着し、接着部によって形成される固着部６を有する。Thesubstrate fixing structure 1 according to the second reference example shown in FIG. 2 includes asensor 2, asubstrate 3 on which thesensor 2 is mounted, afixed portion 4 to which thesubstrate 3 is fixed, and afixing portion 6 formed by an adhesive portion that fixes the entire firstmain surface 3a of thesubstrate 3 to thefixed portion 4.

本参考例の構成によると、基板３と被固定部４の線膨張係数が相違する場合、温度変化時に、第１主面３ａに沿う方向の応力が、第１主面３ａのほぼ全体に亘って基板３（及び基板３上のセンサ２関連の回路部品）に生じる。このため、温度変化がセンサ２の測定精度に影響し易い。In the configuration of this reference example, if the linear expansion coefficients of thesubstrate 3 and thefixed portion 4 are different, stress in the direction along the firstmain surface 3a occurs in the substrate 3 (and the circuit components related to thesensor 2 on the substrate 3) over almost the entire firstmain surface 3a when the temperature changes. For this reason, temperature changes are likely to affect the measurement accuracy of thesensor 2.

第１参考例と第２参考例に比較し、後述する本開示の実施形態に係る基板固定構造１によれば、センサ２の測定精度に対する温度変化の影響を抑制できる。また、本開示の実施形態に係る基板固定構造１によれば、被固定部４への基板３の良好な位置決め精度も実現できる。Compared to the first and second reference examples, thesubstrate fixing structure 1 according to the embodiment of the present disclosure described below can suppress the effect of temperature changes on the measurement accuracy of thesensor 2. Furthermore, thesubstrate fixing structure 1 according to the embodiment of the present disclosure can also achieve good positioning accuracy of thesubstrate 3 to the fixedportion 4.

本開示の一実施形態として、まず第１実施形態について説明する。As an embodiment of the present disclosure, we will first describe the first embodiment.

図３～図５に示す第１実施形態に係る基板固定構造１は、センサ２と、センサ２を実装される基板３と、基板３を固定される被固定部４と、基板３の第１主面３ａの第１部分５を被固定部４に固着する固着部６と、基板３の第１主面３ａの第２部分７の裏側部分１１に接する第１表面１２ａと第１表面１２ａの裏側の第２表面１２ｂを有する弾性部材１２と、第１主面３ａに垂直な方向において被固定部４に対する位置が規制され、弾性部材１２の第２表面１２ｂに接する規制部１３と、を有する。また被固定部４は、基板３の第１主面３ａの第２部分７に固着されずに接する。Thesubstrate fixing structure 1 according to the first embodiment shown in Figures 3 to 5 includes asensor 2, asubstrate 3 on which thesensor 2 is mounted, afixed portion 4 to which thesubstrate 3 is fixed, afixing portion 6 that fixes afirst portion 5 of the firstmain surface 3a of thesubstrate 3 to thefixed portion 4, anelastic member 12 having afirst surface 12a that contacts aback portion 11 of thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 and asecond surface 12b on the back side of thefirst surface 12a, and a restrictingportion 13 that is restricted in position relative to the fixedportion 4 in a direction perpendicular to the firstmain surface 3a and contacts thesecond surface 12b of theelastic member 12. Thefixed portion 4 contacts thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 without being fixed thereto.

第１部分５は、第１主面３ａに沿う第１方向Ｄ１において基板３の一端部３ｂに位置し、第２部分７は、第１方向Ｄ１において基板３の他端部３ｃに位置し、センサ２は、第１方向Ｄ１における基板３の一端部３ｂと他端部３ｃとの間に位置する。Thefirst portion 5 is located at oneend 3b of thesubstrate 3 in the first direction D1 along the firstmain surface 3a, thesecond portion 7 is located at theother end 3c of thesubstrate 3 in the first direction D1, and thesensor 2 is located between the oneend 3b and theother end 3c of thesubstrate 3 in the first direction D1.

固着部６は、基板３と被固定部４を締結する締結具１０によって形成される。締結具１０は、図示するようにボルトであってもよいし、リベットなどであってもよい。なお、図３は締結具１０を締結する前の状態を示す。固着部６は、締結具１０に限らず、接着部又は溶着部などによって形成してもよい。Thefixing portion 6 is formed by afastener 10 that fastens thesubstrate 3 and the fixedportion 4. Thefastener 10 may be a bolt as shown in the figure, or may be a rivet, etc. Note that FIG. 3 shows the state before thefastener 10 is fastened. Thefixing portion 6 is not limited to being formed by thefastener 10, and may be formed by an adhesive part, a welded part, etc.

被固定部４は、基板３を第１主面３ａに沿う方向に位置決めするように基板３に接する第１位置決め部１４を有する。第１位置決め部１４は、基板３を第１方向Ｄ１に位置決めする。より具体的には、第１位置決め部１４は、基板３の側面３ｆに接することで基板３を位置決めする。第１位置決め部１４は凸状をなす。第１位置決め部１４は単一の凸部で形成してもよいし、複数の凸部で形成してもよいし、凸部の形状は適宜設定できる。The fixedportion 4 has afirst positioning portion 14 that contacts thesubstrate 3 so as to position thesubstrate 3 in a direction along the firstmain surface 3a. Thefirst positioning portion 14 positions thesubstrate 3 in the first direction D1. More specifically, thefirst positioning portion 14 positions thesubstrate 3 by contacting theside surface 3f of thesubstrate 3. Thefirst positioning portion 14 is convex. Thefirst positioning portion 14 may be formed of a single convex portion or multiple convex portions, and the shape of the convex portions can be set as appropriate.

被固定部４は、第１主面３ａに沿い第１方向Ｄ１に垂直な第２方向Ｄ２に基板３を位置決めする第２位置決め部１５を有する。第２位置決め部１５は、基板３の側面３ｆに接することで基板３を位置決めする。第２位置決め部１５は、少なくとも基板３における第１方向Ｄ１の他端側の部分を位置決めする。第２位置決め部１５は凸状をなす。第２位置決め部１５は単一の凸部で形成してもよいし、複数の凸部で形成してもよいし、凸部の形状は適宜設定できる。The fixedportion 4 has asecond positioning portion 15 that positions thesubstrate 3 in a second direction D2 perpendicular to the first direction D1 along the firstmain surface 3a. Thesecond positioning portion 15 positions thesubstrate 3 by contacting theside surface 3f of thesubstrate 3. Thesecond positioning portion 15 positions at least the portion of thesubstrate 3 on the other end side in the first direction D1. Thesecond positioning portion 15 is convex. Thesecond positioning portion 15 may be formed of a single convex portion or multiple convex portions, and the shape of the convex portions can be set as appropriate.

基板３は、第１方向Ｄ１の幅と第２方向Ｄ２の幅が何れも第１主面３ａに垂直な方向の幅よりも大きい板状をなす。換言すれば、基板３は、第１主面３ａとその反対側の第２主面３ｇがその他の面よりも大きい板状をなす。なお、説明の便宜上、第１主面３ａに垂直な方向を上下方向ともいい、第１主面３ａから第２主面３ｇに向かう側を上側ともいい、その反対側を下側ともいう。Thesubstrate 3 is in the form of a plate in which the width in the first direction D1 and the width in the second direction D2 are both greater than the width in the direction perpendicular to the firstmain surface 3a. In other words, thesubstrate 3 is in the form of a plate in which the firstmain surface 3a and the secondmain surface 3g on the opposite side are greater than the other surfaces. For ease of explanation, the direction perpendicular to the firstmain surface 3a is also referred to as the up-down direction, the side from the firstmain surface 3a toward the secondmain surface 3g is also referred to as the upper side, and the opposite side is also referred to as the lower side.

基板３は、第１方向Ｄ１に沿って延びる２つの側面３ｆと、第２方向Ｄ２に沿って延びる２つの側面３ｆと、を有する。つまり、基板３は、上面視で矩形状をなす矩形板状をなす。なお、基板３は矩形板状に限らず、例えば円板状などに構成してもよい。Thesubstrate 3 has twoside surfaces 3f extending along the first direction D1 and twoside surfaces 3f extending along the second direction D2. In other words, thesubstrate 3 has a rectangular plate shape that is rectangular when viewed from above. Note that thesubstrate 3 is not limited to a rectangular plate shape, and may be configured, for example, in a disk shape.

基板３は平板状をなし、被固定部４は、平面状の第１主面３ａに沿うように平面状をなす被固定面４ａを有する。被固定面４ａは、基板３の第１主面３ａの第１部分５と第２部分７に接する。なお、基板３は平板状に限らず、例えば上側又は下側に突出する球面状又は円柱面状などの曲面状板状に構成してもよく、この場合、被固定面４ａの形状は基板３の形状に合わせて適宜設定できる。Thesubstrate 3 is flat, and the fixedportion 4 has a flat fixedsurface 4a that is aligned with the flat firstmain surface 3a. The fixedsurface 4a contacts thefirst portion 5 and thesecond portion 7 of the firstmain surface 3a of thesubstrate 3. Thesubstrate 3 is not limited to being flat, and may be configured as a curved plate, such as a spherical or cylindrical surface that protrudes upward or downward. In this case, the shape of the fixedsurface 4a can be appropriately set to match the shape of thesubstrate 3.

弾性部材１２は、例えばゴム又はエラストマーなどによって形成される。弾性部材１２の形状は、基板３の第１主面３ａの第２部分７の裏側部分１１に接する第１表面１２ａ（下面）と第１表面１２ａの裏側の第２表面１２ｂ（上面）を有する範囲で適宜設定でき、図示するような板状に限らない。組み立て性を考慮し、弾性部材１２を基板３と規制部１３の何れか一方に固着することが好ましい。なお、弾性部材１２を基板３と規制部１３の何れにも固着しない構成としてもよいし、弾性部材１２を基板３と規制部１３の両方に固着する構成としてもよい。Theelastic member 12 is formed of, for example, rubber or elastomer. The shape of theelastic member 12 can be set appropriately within the range of having afirst surface 12a (lower surface) that contacts theback side portion 11 of thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 and asecond surface 12b (upper surface) on the back side of thefirst surface 12a, and is not limited to a plate shape as shown in the figure. In consideration of ease of assembly, it is preferable to fix theelastic member 12 to either thesubstrate 3 or the regulatingportion 13. Note that theelastic member 12 may be configured not to be fixed to either thesubstrate 3 or the regulatingportion 13, or may be configured to be fixed to both thesubstrate 3 and the regulatingportion 13.

本実施形態では、規制部１３が、第１主面３ａに垂直な方向において被固定部４に対する位置が規制され、弾性部材１２の第２表面１２ｂに接し、弾性部材１２の第１表面１２ａが、基板３の第１主面３ａの第２部分７の裏側部分１１に接し、被固定部４が、基板３の第１主面３ａの第２部分７に固着されずに接する。In this embodiment, the position of the regulatingportion 13 relative to the fixedportion 4 in a direction perpendicular to the firstmain surface 3a is regulated, the regulatingportion 13 contacts thesecond surface 12b of theelastic member 12, thefirst surface 12a of theelastic member 12 contacts theback portion 11 of thesecond portion 7 of the firstmain surface 3a of thesubstrate 3, and the fixedportion 4 contacts thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 without being fixed thereto.

したがって本実施形態によれば、基板３の第１主面３ａの第２部分７を、第１主面３ａに垂直な方向において、被固定部４の被固定面４ａに接する位置に精度良く位置決めできる。またこの状態で、基板３の第１主面３ａの第２部分７は被固定部４の被固定面４ａに対して相対的に第１方向Ｄ１に容易に変位できるため、本実施形態によれば、基板３と被固定部４の線膨張係数が相違する場合でも、温度変化時に基板３（及び基板３上のセンサ２関連の回路部品）に生じる応力を抑制でき、もって、センサ２の測定精度に対する温度変化の影響を抑制できる。Therefore, according to this embodiment, thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 can be accurately positioned at a position where it contacts the fixedsurface 4a of thefixed part 4 in a direction perpendicular to the firstmain surface 3a. Furthermore, in this state, thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 can be easily displaced in the first direction D1 relative to the fixedsurface 4a of thefixed part 4. Therefore, according to this embodiment, even if the linear expansion coefficients of thesubstrate 3 and thefixed part 4 are different, the stress generated in the substrate 3 (and the circuit components related to thesensor 2 on the substrate 3) during temperature changes can be suppressed, and the effect of temperature changes on the measurement accuracy of thesensor 2 can be suppressed.

また本実施形態では第１位置決め部１４と第２位置決め部１５により、被固定部４への基板３の位置決め精度を向上できる。In addition, in this embodiment, thefirst positioning portion 14 and thesecond positioning portion 15 can improve the positioning accuracy of thesubstrate 3 relative to the fixedportion 4.

なお規制部１３は、被固定部４を形成する部材と一体に設けてもよいし、別体に設けて組み付けてもよい。規制部１３によって弾性部材１２を基板３に押し付ける押し付け力の大きさは、位置決め精度と測定精度のバランスを考慮して適宜設定できる。押し付け力をゼロに設定してもよい。The restrictingportion 13 may be provided integrally with the member forming the fixedportion 4, or may be provided separately and then assembled. The magnitude of the pressing force with which the restrictingportion 13 presses theelastic member 12 against thesubstrate 3 can be set appropriately, taking into consideration the balance between positioning accuracy and measurement accuracy. The pressing force may be set to zero.

次に、第２実施形態について説明する。Next, we will explain the second embodiment.

図６に示す第２実施形態に係る基板固定構造１は、第１位置決め部１４と第２位置決め部１５の構成が第１実施形態の場合とは異なり、その他の構成は第１実施形態の場合と同様である。なお、図６は締結具１０を締結する前の状態を示す。Thesubstrate fixing structure 1 according to the second embodiment shown in FIG. 6 differs from the first embodiment in the configuration of thefirst positioning portion 14 and thesecond positioning portion 15, but the other configurations are the same as those of the first embodiment. Note that FIG. 6 shows the state before thefastener 10 is fastened.

本実施形態では、第１位置決め部１４は、基板３に設けられる穴３ｈの側面に接することで基板３を第１方向Ｄ１に位置決めする。穴３ｈは基板３を上下方向に貫通する底面視円形の貫通穴からなり、第１位置決め部１４は穴３ｈに挿入される上面視円形の凸状をなす。なお、穴３ｈは貫通穴に限らず、凹状をなす構成としてもよく、穴３ｈの形状は底面視円形に限らない。また、第１位置決め部１４の形状は上面視円形に限らず、適宜設定できる。In this embodiment, thefirst positioning portion 14 positions thesubstrate 3 in the first direction D1 by contacting the side of ahole 3h provided in thesubstrate 3. Thehole 3h is a through hole that is circular when viewed from the bottom and penetrates thesubstrate 3 in the vertical direction, and thefirst positioning portion 14 has a circular convex shape when viewed from the top and is inserted into thehole 3h. Note that thehole 3h is not limited to being a through hole, but may be configured to have a concave shape, and the shape of thehole 3h is not limited to being circular when viewed from the bottom. Furthermore, the shape of thefirst positioning portion 14 is not limited to being circular when viewed from the top, and can be set as appropriate.

本実施形態では、第２位置決め部１５は、基板３に設けられる第１方向Ｄ１に細長い長穴３ｉの側面に接することで基板３を第２方向Ｄ２に位置決めする。長穴３ｉは基板３を上下方向に貫通する貫通穴からなり、第１位置決め部１４は穴に挿入される上面視円形の凸状をなす。なお、長穴３ｉは貫通穴に限らず、凹状をなす構成としてもよい。第１位置決め部１４の形状は上面視円形に限らず、適宜設定できる。第２位置決め部１５は、基板３における第１方向Ｄ１の他端側の部分を位置決めする。In this embodiment, thesecond positioning portion 15 positions thesubstrate 3 in the second direction D2 by contacting the side of a long andnarrow slot 3i in the first direction D1 provided in thesubstrate 3. Theslot 3i is a through hole that penetrates thesubstrate 3 in the vertical direction, and thefirst positioning portion 14 has a circular convex shape when viewed from above and is inserted into the hole. Note that theslot 3i is not limited to a through hole, and may be configured to have a concave shape. The shape of thefirst positioning portion 14 is not limited to a circular shape when viewed from above, and can be set as appropriate. Thesecond positioning portion 15 positions the other end side of thesubstrate 3 in the first direction D1.

本実施形態によれば、第１実施形態の場合と同様に、センサ２の測定精度に対する温度変化の影響を抑制でき、被固定部４への基板３の良好な位置決め精度も実現できる。According to this embodiment, as in the first embodiment, the effect of temperature changes on the measurement accuracy of thesensor 2 can be suppressed, and good positioning accuracy of thesubstrate 3 to the fixedportion 4 can be achieved.

本開示は前述した実施形態に限定されず、その要旨を逸脱しない範囲で種々変更可能である。This disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present disclosure.

したがって、前述した実施形態に係る基板固定構造１は、センサ２と、センサ２を実装される基板３と、基板３を固定される被固定部４と、基板３の第１主面３ａの第１部分５を被固定部４に固着する固着部６と、基板３の第１主面３ａの第２部分７の裏側部分１１に接する第１表面１２ａと第１表面１２ａの裏側の第２表面１２ｂを有する弾性部材１２と、第１主面３ａに垂直な方向において被固定部４に対する位置が規制され、弾性部材１２の第２表面１２ｂに接する規制部１３と、を有し、被固定部４が、基板３の第１主面３ａの第２部分７に固着されずに接する、基板固定構造１である限り、種々変更可能である。Therefore, thesubstrate fixing structure 1 according to the embodiment described above can be modified in various ways as long as it is asubstrate fixing structure 1 that includes asensor 2, asubstrate 3 on which thesensor 2 is mounted, a fixedportion 4 to which thesubstrate 3 is fixed, a fixingportion 6 that fixes afirst portion 5 of the firstmain surface 3a of thesubstrate 3 to the fixedportion 4, anelastic member 12 having afirst surface 12a that contacts aback portion 11 of thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 and asecond surface 12b on the back side of thefirst surface 12a, and a restrictingportion 13 that is restricted in position relative to the fixedportion 4 in a direction perpendicular to the firstmain surface 3a and contacts thesecond surface 12b of theelastic member 12, and the fixedportion 4 is in contact with thesecond portion 7 of the firstmain surface 3a of thesubstrate 3 without being fixed thereto.

例えば、被固定部４に第１位置決め部１４と第２位置決め部１５の何れか一方又は両方を設けない構成としてもよい。基板３上のセンサ２の配置は適宜設定できる。For example, the fixedportion 4 may be configured without either or both of thefirst positioning portion 14 and thesecond positioning portion 15. The arrangement of thesensor 2 on thesubstrate 3 can be set as appropriate.

なお、前述した実施形態に係る基板固定構造１は、第１部分５が、第１主面３ａに沿う第１方向Ｄ１において基板３の一端部３ｂに位置し、第２部分７が、第１方向Ｄ１において基板３の他端部３ｃに位置し、センサ２が、第１方向Ｄ１における基板３の一端部３ｂと他端部３ｃとの間に位置する、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thefirst portion 5 is located at oneend 3b of thesubstrate 3 in the first direction D1 along the firstmain surface 3a, thesecond portion 7 is located at theother end 3c of thesubstrate 3 in the first direction D1, and thesensor 2 is located between the oneend 3b and theother end 3c of thesubstrate 3 in the first direction D1.

前述した実施形態に係る基板固定構造１は、被固定部４が、基板３を第１主面３ａに沿う方向に位置決めするように基板３に接する第１位置決め部１４を有する、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which the fixedportion 4 has afirst positioning portion 14 that contacts thesubstrate 3 so as to position thesubstrate 3 in a direction along the firstmain surface 3a.

前述した実施形態に係る基板固定構造１は、第１位置決め部１４が、基板３を第１方向Ｄ１に位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thefirst positioning portion 14 positions thesubstrate 3 in the first direction D1.

前述した実施形態に係る基板固定構造１は、第１位置決め部１４が、基板３の側面３ｆに接することで基板３を位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thefirst positioning portion 14 positions thesubstrate 3 by contacting theside surface 3f of thesubstrate 3.

前述した実施形態に係る基板固定構造１は、第１位置決め部１４が、基板３に設けられる穴３ｈの側面に接することで基板３を位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thefirst positioning portion 14 positions thesubstrate 3 by contacting the side of thehole 3h provided in thesubstrate 3.

前述した実施形態に係る基板固定構造１は、被固定部４が、第１主面３ａに沿い第１方向Ｄ１に垂直な第２方向Ｄ２に基板３を位置決めする第２位置決め部１５を有する、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which the fixedportion 4 has asecond positioning portion 15 that positions thesubstrate 3 in a second direction D2 perpendicular to the first direction D1 along the firstmain surface 3a.

前述した実施形態に係る基板固定構造１は、第２位置決め部１５が、基板３の側面３ｆに接することで基板３を位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thesecond positioning portion 15 positions thesubstrate 3 by contacting theside surface 3f of thesubstrate 3.

前述した実施形態に係る基板固定構造１は、第２位置決め部１５が、基板３に設けられる第１方向Ｄ１に細長い長穴３ｉの側面に接することで基板３を位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thesecond positioning portion 15 positions thesubstrate 3 by contacting the side of anelongated hole 3i in the first direction D1 provided in thesubstrate 3.

前述した実施形態に係る基板固定構造１は、第２位置決め部１５が、少なくとも基板３における第１方向Ｄ１の他端側の部分を位置決めする、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-described embodiment is preferably asubstrate fixing structure 1 in which thesecond positioning portion 15 positions at least the portion of thesubstrate 3 on the other end side in the first direction D1.

前述した実施形態に係る基板固定構造１は、固着部６が、基板３と被固定部４を締結するボルト又はリベットなどの締結具１０によって形成される、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-mentioned embodiment is preferably asubstrate fixing structure 1 in which the fixingportion 6 is formed by afastener 10 such as a bolt or rivet that fastens thesubstrate 3 and the fixedportion 4.

前述した実施形態に係る基板固定構造１は、固着部６が接着部又は溶着部によって形成される、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-mentioned embodiment is preferably asubstrate fixing structure 1 in which the fixingportion 6 is formed by an adhesive portion or a welded portion.

前述した実施形態に係る基板固定構造１は、第１位置決め部１４が凸状をなす、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-mentioned embodiment is preferably asubstrate fixing structure 1 in which thefirst positioning portion 14 is convex.

前述した実施形態に係る基板固定構造１は、第２位置決め部１５が凸状をなす、基板固定構造１であることが好ましい。Thesubstrate fixing structure 1 according to the above-mentioned embodiment is preferably asubstrate fixing structure 1 in which thesecond positioning portion 15 is convex.

１基板固定構造
２センサ
３基板
３ａ第１主面
３ｂ第１方向の一端部
３ｃ第１方向の他端部
３ｄ第２方向の一端部
３ｅ第２方向の他端部
３ｆ側面
３ｇ第２主面
３ｈ穴
３ｉ長穴
４被固定部
４ａ被固定面
５第１部分
６固着部
６ａ第１固着部
６ｂ第２固着部
６ｃ第３固着部
６ｄ第４固着部
７第２部分
８第３部分
９第４部分
１０締結具
１１裏側部分
１２弾性部材
１２ａ第１表面
１２ｂ第２表面
１３規制部
１４第１位置決め部
１５第２位置決め部
Ｄ１第１方向
Ｄ２第２方向 REFERENCE SIGNSLIST 1Substrate fixing structure 2Sensor 3Substrate 3a Firstmain surface 3b One end in thefirst direction 3c Other end in thefirst direction 3d One end in thesecond direction 3e Other end in thesecond direction 3fSide surface 3g Secondmain surface 3hHole 3i Slottedhole 4Fixed portion 4a Fixedsurface 5First portion 6Fixing portion 6aFirst fixing portion 6bSecond fixing portion 6cThird fixing portion 6dFourth fixing portion 7 Second portion 8 Third portion 9Fourth portion 10Fastener 11Back portion 12Elastic member12a First surface12b Second surface 13 Restrictingportion 14First positioning portion 15 Second positioning portion D1 First direction D2 Second direction

Claims

Translated fromJapanese

センサと、
前記センサを実装される基板と、
前記基板を固定される被固定部と、
前記基板の第１主面の第１部分を前記被固定部に固着する固着部と、
前記基板の前記第１主面の第２部分の裏側部分に接する第１表面と第１表面の裏側の第２表面を有する弾性部材と、
前記第１主面に垂直な方向において前記被固定部に対する位置が規制され、前記弾性部材の前記第２表面に接する規制部と、を有し、
前記被固定部が、前記基板の前記第１主面の前記第２部分に固着されずに接し、
前記第１部分が、前記第１主面に沿う第１方向において前記基板の一端部に位置し、
前記第２部分が、前記第１方向において前記基板の他端部に位置し、
前記センサが、前記第１方向における前記基板の前記一端部と前記他端部との間に位置する、基板固定構造。 A sensor;
A substrate on which the sensor is mounted;
A fixed portion to which the substrate is fixed;
a fixing portion that fixes a first portion of the first main surface of the substrate to the fixed portion;
an elastic member having a first surface in contact with a back portion of the second portion of the first main surface of the substrate and a second surface on the back side of the first surface;
a restricting portion whose position with respect to the fixed portion is restricted in a direction perpendicular to the first main surface and which contacts the second surface of the elastic member;
the fixed portion isin contact with the second portion of the first main surface of the substrate without being fixed thereto;
the first portion is located at one end of the substrate in a first direction along the first main surface,
the second portion is located at the other end of the substrate in the first direction,
A substrate fixing structure, wherein the sensor is located between the one end and the other end of the substrate in the first direction .

前記被固定部が、前記基板を前記第１主面に沿う方向に位置決めするように前記基板に接する第１位置決め部を有する、請求項１に記載の基板固定構造。 The substrate fixing structure according to claim1 , wherein the fixed portion has a first positioning portion that contacts the substrate so as to position the substrate in a direction along the first main surface.

前記第１位置決め部が、前記基板を前記第１方向に位置決めする、請求項２に記載の基板固定構造。 The substrate fixing structure according to claim2 , wherein the first positioning portion positions the substrate in the first direction.

前記第１位置決め部が、前記基板の側面に接することで前記基板３を位置決めする、請求項３に記載の基板固定構造。 The substrate fixing structure according to claim3 , wherein the first positioning portion positions the substrate by contacting a side surface of the substrate.

前記第１位置決め部が、前記基板に設けられる穴の側面に接することで前記基板３を位置決めする、請求項３に記載の基板固定構造。 The substrate fixing structure according to claim3 , wherein the first positioning portion positions the substrate by contacting a side surface of a hole provided in the substrate.

前記被固定部が、前記第１主面に沿い前記第１方向に垂直な第２方向に前記基板を位置決めする第２位置決め部を有する、請求項３に記載の基板固定構造。 The substrate fixing structure according to claim3 , wherein the fixed portion has a second positioning portion that positions the substrate in a second direction perpendicular to the first direction along the first main surface.

前記第２位置決め部が、少なくとも前記基板における前記第１方向の前記他端側の部分を位置決めする、請求項６に記載の基板固定構造。 The substrate fixing structure according to claim6 , wherein the second positioning portion positions at least a portion of the substrate on the other end side in the first direction.

前記第２位置決め部が、前記基板の側面に接することで前記基板を位置決めする、請求項６に記載の基板固定構造。 The substrate fixing structure according to claim6 , wherein the second positioning portion positions the substrate by contacting a side surface of the substrate.

前記第２位置決め部が、前記基板に設けられる前記第１方向に細長い長穴の側面に接することで前記基板を位置決めする、請求項６に記載の基板固定構造。 The substrate fixing structure according to claim6 , wherein the second positioning portion positions the substrate by contacting a side surface of a slot that is elongated in the first direction and is provided in the substrate.