CN114767104A - Fixed release mechanism and body surface unit implantation device - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, a fixed release mechanism and body surface unit implantation device are provided, wherein fixed release mechanism includes casing down, the second unit that couples each other with first unit, fixed first unit when the second unit is located the primary importance, release first unit when the second unit is located the secondary importance, the second unit includes basal portion and the clamping part that is located basal portion one side, the clamping part contains two at least centre gripping arms, the casing is provided with guide clamping arm deformation guide portion down. By applying the solution disclosed in the present application, the first unit is not displaced, nor stressed, relative to the lower housing when released. The body surface unit implanting device prepared by the fixing and releasing mechanism disclosed by the application can overcome the risk of insecure connection and easy separation of the body surface unit and the implanting device.

Description

Fixed release mechanism and body surface unit implantation device

Technical Field

The present application relates to the field of medical devices, and more particularly to medical devices for stably securing and releasing a device, such as a body surface unit, to and from an implant device when desired.

Background

For the chronic disease management related to the metabolic function of human body, a body surface implanted medical apparatus technology is developed, which is to implant a sensor part into the human body to monitor the content of certain compounds (such as blood sugar, blood ketone, aldehydes, lactic acid and the like) in blood or interstitial fluid in real time, so that the current physiological condition can be accurately known to take necessary measures to avoid the deterioration of diseases.

Generally, the sensors used in the body surface implantable medical device technology are electrochemical sensors, which need to be used in combination with peripheral components of the sensors, wherein the peripheral components of the sensors include a conducting component electrically connected with the sensors, a silicone seat, electronic components, a power supply, a base capable of accommodating the above components, and a double-sided adhesive tape for relatively fixedly attaching the sensors to the body surface. The sensor and the sensor peripheral component jointly form a body surface unit which is attached to the body surface to realize the monitoring of the content of certain compounds in blood or interstitial fluid.

Aiming at the body surface implantable medical device technology, two using modes exist at present. The first method is to attach the peripheral components of the sensor to the body surface by a double-sided adhesive tape (for example, by manual pressing), implant the sensor partially under the skin, and electrically connect the sensor to the electronic components by the conducting component. The second is to attach the sensor peripheral member to the body surface by means of a double-sided adhesive tape while the sensor is partially implanted subcutaneously (i.e., the device is implanted while applying an impact force perpendicular to the body surface to the sensor peripheral member during the partial implantation of the sensor under the skin, the applied force being sufficient to allow the double-sided adhesive tape to firmly attach to the body surface), wherein the sensor and the electronic components are pre-connected before being implanted subcutaneously.

Compared with the second use mode, although the first use mode has some inconvenience, the requirements on the complexity and the mutual linkage relation of all parts in the implantation device are far lower than those of the second use mode, so that the two modes are commonly used in practical application.

In the two using modes, the sensor is not hard enough to support the sensor to be implanted into the human body through the skin, so the sensor needs to be implanted into the skin by a puncture needle. In the first usage mode, because the subsequent operation of electrically connecting the sensor and the electronic components is required, the body surface unit is usually designed to be connected with part of the components in the implantation device, for example, in the patent publication CN109998555, the guide needle is connected with the silicone seat, and the sensor and the conductive rubber are electrically connected after the guide needle and the puncture needle are retracted in the implantation process.

In the prior art, the body surface unit is connected with the implanting device only through the friction between the guide needle and the silica gel seat, and other stable fixing modes are avoided, so that the risk of separation can occur under the vibration condition. In addition, because the body surface unit contains the double faced adhesive tape, the double faced adhesive tape can be unintentionally adhered to the surface of other objects when the patient uses the body surface unit to cause the body surface unit to fall off from the implantation device, so that the medical instrument cannot be used and needs to be scrapped integrally.

Disclosure of Invention

In view of some of the possible drawbacks of the prior art, the present application discloses, in one aspect, a fixing and releasing mechanism that can solve one of the above-mentioned drawbacks, and that can stably fix or reliably release a mechanical component when necessary, and that has high convenience in operation.

The fixed release mechanism disclosed in this application refers to securing one mechanical part to another mechanical part and releasing one mechanical part from the other mechanical part when desired by activating the drive assembly.

As an aspect of the present application, there is disclosed a fixing and releasing mechanism satisfying the above functional requirements, comprising: a lower housing for receiving a first unit (i.e., one of the mechanical parts described above), and a second unit (i.e., the other of the mechanical parts described above) coupled to the first unit, wherein the first unit is a unit fixed or released by the second unit, and wherein the first unit is fixed when the second unit is located at a first position and the first unit is released when the second unit is located at a second position.

Further, the first unit is configured to be fixed in position relative to the lower case, and in more detail, the first unit is configured to be fixed in position relative to the lower case (from being fixed by the second unit to being released by the second unit) during the releasing process.

Further, the second unit is configured to move from a first position to a second position closer to the first unit than the first position.

Still further, the second unit comprises a base and a clamping portion located at one side of the base, the clamping portion comprising at least two clamping arms, the clamping arms being in contact with the first unit; in more detail, the clamping portion is provided on a side of the base portion adjacent to the first unit. In more detail, a locking hook can be arranged at the end part of the clamping arm, so that the clamping arm can hook the first unit to realize more stable fixation; correspondingly, a locking groove matched with the locking hook can also be arranged on the first unit.

Further, the lower housing is provided with a guide portion that guides the grip arms to, for example, elastically deform when the second unit moves from the first position to the second position, so that an end distance between adjacent two grip arms switches from a first distance to a second distance, the second distance being greater than the first distance. In more detail, the clamping arms are in contact with the first unit when the distance between the end parts of two adjacent clamping arms is a first distance, and the clamping arms are separated from the first unit when the distance between the end parts of two adjacent clamping arms is a second distance.

Preferably, the second unit is configured to move from the first position to the second position in a linear manner along with the driving unit, wherein the second unit further comprises a hook, the driving unit further comprises a groove coupled with the hook, and when the second unit is located at the first position, the second unit and the driving unit form a temporary fixed relationship through the hook and the groove; when the second unit linearly moves from the first position to the second position and then stops moving, the driving unit is stressed to keep the trend of continuous movement, the hooks deform under the stress condition, the distance between the hooks is increased, and the hooks slip off from the grooves, namely when the second unit is positioned at the second position, the hooks slip off from the grooves, the second unit and the driving unit are separated from each other and are relatively independent, and the driving unit can continuously move. The hook and the groove can adopt the conventional design in the prior art, for example, the contact surface of the hook and the groove is an inclined surface, an arc surface and the like, and the hook can be deformed to increase the distance between the hook and the groove when the hook and the groove are stressed and relatively extruded.

Furthermore, for the convenience of manufacture and assembly, the driving unit is configured to have a cylindrical body and an attachment connected to the cylindrical body, and the groove may be disposed on the cylindrical body of the driving unit or on the attachment, and more particularly, the groove is disposed near the second unit.

Preferably, the hook of the second unit is arranged on the opposite side of the base from the clamping portion, i.e. the hook and the clamping portion are respectively arranged on both sides of the base.

Preferably, the second unit has a second stroke when moving from the first position to the second position, and the drive unit has a first stroke in the second unit moving direction. The driving unit can drive the second unit to do linear motion and can drive other components according to requirements, therefore, the first stroke and the second stroke can be the same or different, and the first stroke can be set to be larger than the second stroke in some special occasions.

Preferably, the first stroke is set to be greater than the second stroke, which means that there is a possibility that parts of the drive unit and the second unit overlap, and therefore the base of the second unit is set to accommodate at least part of the drive unit.

Preferably, the first stroke of the driving unit and the second stroke of the second unit have the same end position, which is beneficial to the design and assembly of products.

Preferably, the clamp arm is further provided with a projection, and the projection is in contact with the guide when the second unit is located at the second position.

The protruding part and the guiding part are matched with each other, and can be independently or completely arranged into a hemispherical structure, a wedge-shaped structure and the like, so long as the purpose of guiding the clamping arm to be far away from the first unit can be achieved.

Preferably, the lower housing surface is provided with a recess to receive the first unit, i.e. the first unit may be received in the first unit from the surface of the lower housing.

As another aspect of the present application, disclosed is a body surface unit implanting device applying the above-described fixation and release mechanism for attaching a body surface unit to a body surface, wherein the body surface unit includes a sensor implanted under the skin, the implanting device including the above-described fixation and release mechanism, wherein the body surface unit corresponds to the first unit in the above expression.

Preferably, the implant device comprises an upper shell, a lower shell and a firing button which form an external profile, and a second unit, a driving unit, a main body bracket and an implant component which are positioned inside the external profile. The implant assembly comprises an insertion needle for subcutaneously implanting the sensor and a resilient means for retracting the insertion needle into the implant assembly after implantation, wherein the implant assembly is similar to that of the patent publication CN 109998555. The drive unit and the main body support both comprise cavity structures, the drive unit is partially arranged in the cavity of the main body support, and the implantation assembly can be integrally arranged in the cavity of the drive unit.

Preferably, the driving unit further comprises a limit hook, and the main body support comprises a limit step matched with the limit hook. The cooperation of limiting hook and limiting step makes drive unit install in the cavity of main part support under the condition that has drive power part to drive unit drives the second unit and moves together along drive power direction when limiting hook breaks away from limiting step.

Preferably, the limit hook is disposed at a side opposite to a linear movement direction of the driving unit, and for example, the limit hook may be disposed at a position far from the groove.

Preferably, the upper housing is further provided with a limit block for limiting the stroke end points of the second unit and the driving unit, so that the second unit and the driving unit can stop moving at the preset position. The two limit blocks are used for respectively and independently limiting the stroke of the second unit and the stroke of the driving unit; or one, which is used for simultaneously limiting the strokes of the second unit and the driving unit (the base of the second unit is provided with a concave surface matched with the edge shape of the driving unit, and the two simultaneously abut against the limiting block); it may also be one for limiting the second unit, in which a further limiting element is provided for limiting the further movement of the drive unit.

Preferably, the implant device does not apply force to the body surface unit during the process of implanting the subcutaneous-implanted sensor in the body surface unit to the body surface using the implant device and releasing the body surface unit.

Preferably, when the body surface unit is accommodated in the lower shell, the implant device has a substantially smooth bottom surface, which is beneficial for attaching the body surface unit to the body surface, wherein the bottom surface can be substantially perpendicular to the implant device, or form an included angle of 30-90 °.

Compared with the prior art, the body surface unit implanting device of the fixed releasing mechanism and the applied mechanism disclosed by the application has the following beneficial effects:

(1) by the movement of the second unit and the design of the cooperation of the clamp arm and the guide portion, the fixed releasing unit (such as the first unit) is stably fixed or reliably released when needed, and the fixed releasing unit is kept unchanged from the position relative to another component (such as a housing) in the process of being fixed to being released.

(2) The fixed release mechanism disclosed in the application does not need to bear extra force in the process of fixing the fixed release unit to be released.

(3) The implant device prepared by the fixing and releasing mechanism disclosed by the application overcomes the risk that the separation is easy to occur because the connection between the body surface unit and the implant device is realized only by the friction force between the guide needle and the peripheral component (such as a silica gel seat) of the sensor in the prior art.

(4) When the body surface unit is attached to the surface of other objects, the body surface unit cannot fall off from the implant device, and the medical equipment cannot be scrapped.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present application and do not constitute a limitation of the present application.

Fig. 1 is a schematic structural diagram of a first unit fixed by a second unit according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a second unit according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a driving unit according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a lower housing including a guiding portion according to an embodiment of the present application.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic diagram of the relative position of the second unit at the end of the stroke when the second unit follows the linear motion of the driving unit, where the first unit is released by the second unit.

FIG. 7 is a schematic view of an implant assembly and a body surface unit including subcutaneously implanted sensors according to one embodiment of the present application.

FIG. 8 is an exploded view of a body surface unit implant device according to one embodiment of the present application.

Fig. 9 is an upper housing including a second unit and an end-of-travel stop for a drive unit according to an embodiment of the present disclosure.

FIG. 10 is a schematic view showing the relative positional relationship between the second unit and the lower shell guide after the body surface unit (first unit) is released by the body surface unit implanting device according to the embodiment of the present application.

Fig. 11 is a partial enlarged view of fig. 10 at B.

FIG. 12 is a schematic view of a bottom surface of a body surface unit implanted device according to an embodiment of the application after release of the body surface unit.

Reference numerals: 1. a first unit; 2. a second unit; 21. a base; 22. a clamping portion; 221. a clamp arm; 222. a boss portion; 23. a hook; 3. a drive unit; 30. a columnar body; 312. an accessory; 31. a groove; 32. a limiting hook; 4. a lower housing; 41. a guide section; 5. a main body support; 51. a drive spring; 52. a drive unit movement guide; 53. a limiting step; 6. an implant assembly; 7. an upper housing; 71. a limiting block; 8. and (6) firing the button.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the described embodiments of the present application belong to the protection scope of the present application. In addition, the embodiments and the features of the embodiments in the present application may be combined with each other without conflict. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "coupled," "contacting," and "abutting" define a direct connection and do not include an indirect connection. "upper" and "lower" are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly. "opposite" and "coincident" are used only to indicate relative positional relationships that do not change when the absolute position of the object being described changes. By "contained" is meant that one object is at least partially or fully located within the cavity or formed cavity of another object. "implanted subcutaneously" or "implanted in vivo" or similar expressions mean that the sensor is implanted partially through the skin into the interior of the human body.

An embodiment of the present invention provides a fixing and releasing mechanism, and referring to fig. 1 and 6, afirst unit 1 and asecond unit 2 are coupled to each other, and thefirst unit 1 can be fixed or released by thesecond unit 2. Thefirst unit 1 is secured when thesecond unit 2 is in the first position as described in fig. 1 and thefirst unit 1 is released when thesecond unit 2 is in the second position as described in fig. 6. Thesecond unit 2 is configured to move from a first position to a second position closer to the first unit than the first position, and specifically, the movement of the second unit is a linear movement.

Referring to fig. 1 and 2, thesecond unit 2 includes abase 21 and a clampingportion 22 located at one side of thebase 21, for example, referring to fig. 2, the clampingportion 22 is disposed at one side of the base 21 close to thefirst unit 1, and the clampingportion 22 includes two clampingarms 221; in some other embodiments, theclamp arm 221 may have more than two, such as three, or more. With continued reference to fig. 1, thesecond unit 2 secures thefirst unit 1 in the first position with theclamp arm 221 in contact with the side of thefirst unit 1.

In other embodiments, the clampingarms 221 are arranged in one or more groups opposite to each other in pairs, the number of the clampingarms 221 is even, and theguide parts 41 respectively guide the distance between the end parts of each group of the clampingarms 221 to be increased so as to be away from and separated from the side surface of thefirst unit 1; in other embodiments, the holdingarms 221 are disposed at the periphery of thefirst unit 1, and the number of the holding arms is two or more, and theguide portions 41 respectively guide the distance between the ends of two adjacent holdingarms 221 to increase, and further, to be away from and separated from the side surface of thefirst unit 1.

Referring to fig. 1 and 2, a latch hook is further disposed at an end of theclamping arm 221, so that the latch hook can hook thefirst unit 1 to achieve more stable fixation; correspondingly, a lock groove matched with the lock hook is arranged on thefirst unit 1.

Referring to fig. 4, 5 and 11, thelower housing 4 includes two guidingportions 41 with the same number as the number of the holding arms, and when thesecond unit 2 is located at the second position (releasing the first unit 1), the two guidingportions 41 are disposed to respectively abut against the two holding arms 221 (see fig. 11). In other embodiments, the guidingportion 41 may be provided as a single piece, for example, as a circle around thefirst unit 1, or the guidingportion 41 may be provided as a plurality of discontinuous segments, each of which may abut two or more of the holdingarms 221.

Referring to fig. 10, when thesecond unit 2 is at the second position, the clampingarm 221 is guided by the two guidingportions 41 of thelower housing 4 through the protrudingportion 222 to deform (e.g., elastically deform) so that the distance between the ends of the two clampingarms 221 is increased, and theclamping arm 221 is separated from the side of the first unit 1 (in some embodiments, thefirst unit 1 may be a body watch unit), so that thefirst unit 1 is released by thesecond unit 2.

In the process of fixing thefirst unit 1 to thesecond unit 2 to be released, thesecond unit 2 is separated from thefirst unit 1 by the driving force, the holdingarm 221 of thesecond unit 2 is guided to deform (both elastic deformation and permanent deformation) by theguide portion 41 in thelower case 4 to increase the end distance, and the position of thefirst unit 1 relative to thelower case 4 is not changed in the whole process, and no force can be applied to thefirst unit 1.

Referring to fig. 1, 6 and 7 together, thesecond unit 2 is pushed by the drivingunit 3 and moves along with it, and thedriving unit 3 moves linearly along the drivingunit moving guide 52 under the driving of the drivingspring 51. Referring to fig. 2 and 3, thesecond unit 2 further includes ahook 23, and thedriving unit 3 further includes agroove 31 coupled with thehook 23. With continued reference to fig. 1, when thesecond unit 2 is in the first position, thesecond unit 2 and thedriving unit 3 are in a temporary fixed relationship by thehook 23 and thegroove 31; with continued reference to fig. 6, thehook 23 slides out of therecess 31 when thesecond unit 2 is in the second position.

Referring to fig. 1-3 and fig. 6 together, when thesecond unit 2 is located at the first position (the position shown in fig. 1), the twohooks 23 are coupled with the twogrooves 31, respectively, and thedriving unit 3 moves along the drivingunit moving guide 52 to push thesecond unit 2 to move along with the driving unit; when thesecond unit 2 is located at the second position (the position shown in fig. 6), thesecond unit 2 is limited to stop moving, and when the drivingunit 3 still keeps the trend of continuing to move, the twohooks 23 respectively slip out of the twogrooves 31, the drivingunit 3 can continue to move to the limited position, and thedriving unit 3 can continue to move when the drivingunit 2 is limited to stop moving, so that other functions of the driving unit can be given, for example, the movement of other components can be triggered or driven, for example, theimplantation component 6 is triggered to perform the implantation action in fig. 7, so as to puncture the skin. Theimplant assembly 6 may be referred to as a puncture needle described in the publication CN109998555A, and a resilient means for retracting the puncture needle into the implant assembly. In other embodiments, the drivingunit 3 can stop moving when thesecond unit 2 stops moving in a limited way when there is no other excitation or driving requirement, and thedriving unit 3 has the same moving stroke as thesecond unit 2, which does not need to consider whether thehook 23 slides out of thegroove 31; thedrive unit 3 can also continue to move to release the spring potential of thedrive spring 51, in which case thecatch 23 has to slip out of therecess 31.

As is apparent from the above-described interlocking relationship between thesecond unit 2 and thedrive unit 3, thedrive unit 3 may have a longer movement stroke than thesecond unit 2, and in this example, thebase portion 21 of thesecond unit 2 may be provided so as not to interfere with thedrive unit 3 in order not to affect the ability of thedrive unit 3 to continue moving after thesecond unit 2 stops moving to a limited extent, for example, thebase portion 21 may be provided so as to partially enclose, for example, an arc shape, thedrive unit 3 may be provided so as to be partially accommodated within the arc of thebase portion 21, or the inner side of the arc of thebase portion 21 may be provided so as to match at least a partial edge shape of thedrive unit 3.

Thegroove 31 can be designed to facilitate thehook 23 to slide out, for example, the contact force-bearing surface of thegroove 31 and thehook 23 shown in fig. 1 or fig. 3 is an arc-shaped surface, and in some other embodiments, the contact force-bearing surface can also be an inclined surface, so that when thehook 23 and thegroove 31 are pressed by force relatively, thehook 23 slides out of thegroove 31, and the distance between the deformation of thehooks 23 is increased. Therecess 31 and catch 23 are configured to cooperate in pairs, for example two pairs as shown in figure 1, in some other embodiments three or more pairs are possible.

With continued reference to fig. 2, thehook 23 is disposed on the opposite side of the base 21 from the holdingportion 22, i.e. thehook 23 and the holdingarm 221 are disposed on two sides of thebase 21 of thesecond unit 2. In some other embodiments, thehook 23 and the holdingarm 221 can be disposed on the same side of thebase 21 of thesecond unit 2, but it is sufficient that thehook 23 and the holdingarm 221 can perform their functions independently and do not interfere with each other.

With continued reference to fig. 3, thedrive unit 3 comprises acylindrical body 30 and anattachment 312 connected to thecylindrical body 30, and therecess 31 is provided on theattachment 312 near thesecond unit 2 side.

Referring to fig. 1, 3, 6 and 7 in combination, the drivingunit 3 is mounted on the drivingunit moving guide 52 of themain body support 5, thecolumn 30 of thedriving unit 3 is accommodated in the cavity of themain body support 5, and thedriving unit 3 further includes alimit hook 32, and thelimit hook 32 is disposed at a position opposite to thegroove 31, for example, on theattachment 312. The drivingunit 3 forms a temporary fixed buckling structure through thelimit hook 32 and thelimit step 53 on themain body bracket 5, when the release is needed, thelimit hook 32 is pressed by thefiring button 8 to be separated from thelimit step 53, and thedriving unit 3 moves linearly along the movingguide rail 52 towards thesecond unit 2 under the action of the drivingspring 51 so as to exert various driving forces.

Referring to fig. 2 and 10, aprotrusion 222 is disposed on theclamping arm 221, for example, at a middle position of theclamping arm 221, and when thesecond unit 2 is located at the second position (see fig. 10), theprotrusion 222 is in abutting contact with the guidingportion 41. Wherein theprotrusion 222 and the guidingportion 41 cooperate with each other to realize the separation of theclamping arm 221 from thefirst unit 1, for example, theprotrusion 222 and the guidingportion 41 shown in fig. 10 are wedge-shaped structures, and in some other embodiments, theprotrusion 222 and the guidingportion 41 may be individually or totally configured as a structure such as a sphere, a hemisphere, a slope, a wedge, etc.

Referring to fig. 8, there is shown an exploded view of an embodiment of a body surface unit implanting device made using the fixation and release mechanism disclosed herein, comprising an upper housing 7, alower housing 4 and afiring button 8 forming an outer profile, and asecond unit 2, adriving unit 3, amain body support 5 and an implantingassembly 6 positioned within the outer profile, wherein thedriving unit 3 and themain body support 5 each comprise a hollow structure, and in connection with fig. 7, the implantingassembly 6 is positioned within thecolumn 30 of thedriving unit 3, and thecolumn 30 of thedriving unit 3 is positioned within themain body support 5. Referring to fig. 1, thesecond unit 2 is connected to thedriving unit 3 via ahook 23. Themain body support 5 is located in the inner cavity of thelower shell 4 together with thesecond unit 2, the body surface unit (first unit 1) is installed in theshell 4 from the bottom recess (as shown in fig. 12) of thelower shell 4, thesecond unit 2 is coupled with the body surface unit (first unit 1) through thelower shell 4, and the puncture needle (not shown) in theimplant assembly 6 is connected with the peripheral component (such as a silicone seat, not shown) of the sensor in the body surface unit (first unit 1) through thelower shell 4.

Referring to fig. 9, it is shown that alimit block 71 is disposed on the upper housing, thelimit block 71 is used for limiting the stroke end point of thesecond unit 2 and the stroke end point of thedriving unit 3, and the stroke of thesecond unit 2 is limited by onelimit block 71, so as to limit the stroke of thedriving unit 3. In other embodiments, a plurality of thestoppers 71 may be provided, for example, twostoppers 71 are provided to limit the stroke of thesecond unit 2 and thedriving unit 3, respectively. In other embodiments, astop block 71 may be provided to limit the stroke of thesecond unit 2 and the stroke of thedriving unit 3 at the same time, that is, the first stroke of thedriving unit 3 and the second stroke of thesecond unit 2 have the same stroke end point.

Referring to fig. 12, the body surface unit (the first unit 1) is located in the bottom concave portion of thelower shell 4 to form a smooth bottom surface, for example, it may be a plane, or an arc surface conforming to the shape of the body surface of a human body, which is beneficial for attaching the body surface unit to the body surface, wherein the bottom surface may be substantially perpendicular to the implantation device, or form an included angle of 30 ° to 90 °.

Moreover, although the foregoing has been described in some detail by way of illustration and example for purposes of understanding the present application, it will be apparent to those skilled in the art that certain changes and modifications may be practiced. Therefore, the description and examples should not be construed as limiting the scope of the application to the particular illustrations and examples described herein, but are intended to cover all modifications and alternatives falling within the true scope and spirit of the application.

Claims (17)

1. A fixed release mechanism comprising: a lower case, a second unit coupled to the first unit, the second unit moving from a first position to a second position, the second unit fixing the first unit when the second unit is located at the first position, the second unit releasing the first unit when the second unit is located at the second position, characterized in that:

the second unit comprises a base and a grip portion on one side of the base, the grip portion comprising at least two grip arms, the grip arms being in contact with the first unit,

the lower case is provided with a guide portion that guides the grip arms to be deformed when the second unit moves from the first position to the second position, so that an end distance between adjacent two grip arms is switched from a first distance to a second distance, the second distance being greater than the first distance.

2. The fixed release mechanism of claim 1, wherein: during the release process, the first unit is configured to be positionally invariant relative to the lower housing.

3. The fixed release mechanism of claim 1, wherein: the movement comprises the second unit making a linear movement following the drive unit.

4. The fixed release mechanism of claim 3, wherein: the clamping portion is disposed on the base portion on a side close to the first unit.

5. The fixed release mechanism of claim 3, wherein: the second unit comprises a hook, the driving unit comprises a groove coupled with the hook, and when the second unit is positioned at the first position, the second unit and the driving unit form a temporary fixed relation through the hook and the groove; when the second unit is located at the second position, the hook slides out of the groove.

6. The fixed release mechanism of claim 5, wherein: the clamping hook is arranged on one side, opposite to the clamping part, of the base part.

7. The fixed release mechanism of claim 3, wherein: the second unit moves from the first position to the second position to form a second stroke, and the driving unit has a first stroke in the second unit moving direction, and the first stroke is larger than the second stroke.

8. The fixed release mechanism of claim 7, wherein: the first stroke of the driving unit and the second stroke of the second unit have consistent stroke end points.

9. The fixed release mechanism of claim 1, wherein: and a protruding part is arranged on the clamping arm, and the protruding part is in abutting contact with the guide part when the second unit is located at the second position.

10. The fixed release mechanism of claim 1, wherein: the guide portion guides the clamp arm away from the first unit.

11. The fixed release mechanism of claim 1, wherein: the lower housing surface is provided with a recess for receiving the first unit.

12. A body surface unit implanting device for attaching a body surface unit to a body surface, characterized by: the body surface unit comprising a sensor implanted subcutaneously, the implant device comprising the immobilization release mechanism of any of claims 1-11, the body surface unit being the first unit of any of claims 1-11.

13. The implant device of claim 12, wherein: the implant device does not apply a force to the body surface unit during the affixing of the body surface unit to the body surface.

14. A body surface unit implanting device for attaching a body surface unit to a body surface, characterized by: the body surface unit comprises a sensor implanted under the skin, the implant device comprises a mechanism for fixing and releasing according to any one of claims 3 to 8, the body surface unit is a first unit according to any one of claims 3 to 8, the implant device comprises a main body support and an implant component, the driving unit and the main body support both comprise cavity structures, the driving unit is partially arranged in a cavity of the main body support, and the implant component is arranged in a cavity of the driving unit.

15. The implant device of claim 14, wherein: the drive unit contains spacing hook, the main part support contain with spacing hook complex spacing step.

16. The implant device of claim 15, wherein: the limiting hook is arranged on one side opposite to the second unit.

17. The implant device of claim 14, wherein: the implantation device comprises an upper shell, wherein a limiting block is arranged on the upper shell and used for limiting the stroke end point of the second unit and the stroke end point of the driving unit.

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