CN113691906A - Wireless headset and method of assembling the same - Google Patents

Abstract

Translated fromChinese

一种无线耳机，包括外壳、组装于所述外壳内的电路单元、电池及发声单元，所述外壳包括具有第一部分与第二部分的杆体与后壳、前壳、塞入体及扣合于所述杆体底部的底座，所述电路单元包括电路板及连接于所述电路板上的柔性电路，所述杆体内形成有沿竖直方向延伸的第一腔体，所述后壳内形成有沿前后方向延伸且与所述第一腔体连通的第二腔体，所述前壳内形成有第三腔体，所述电路板收容固定于所述第一腔体内，所述柔性线路沿所述第一腔体、第二腔体底壁延伸至所述第三腔体内，所述电池固定于所述第二腔体内，所述发声单元固定于所述第三腔体内，所述电池与所述电路板或柔性电路连接，所述发声单元与所述柔性线路连接。本申请还包括无线耳机组装方法。

A wireless earphone includes a casing, a circuit unit, a battery and a sounding unit assembled in the casing, the casing includes a rod body with a first part and a second part, a rear casing, a front casing, a plug-in body and a clasp body. The base at the bottom of the rod body, the circuit unit includes a circuit board and a flexible circuit connected to the circuit board, the rod body is formed with a first cavity extending in the vertical direction, and the rear shell is formed with a A second cavity extending in the front-rear direction and communicating with the first cavity, a third cavity is formed in the front shell, the circuit board is accommodated and fixed in the first cavity, and the flexible circuit is along the The bottom walls of the first cavity and the second cavity extend into the third cavity, the battery is fixed in the second cavity, the sounding unit is fixed in the third cavity, the battery Connected with the circuit board or the flexible circuit, and the sounding unit is connected with the flexible circuit. The present application also includes a wireless headset assembly method.

Description

Wireless earphone and assembling method thereof

Technical Field

The present application relates to the field of audio communications, and more particularly, to a wireless headset and an assembling method thereof.

Background

The wireless earphone is widely applied to daily life and is popular with users, and generally comprises a shell, a battery assembled in the shell, a circuit board, a connecting wire and a sound generating unit. The shell comprises a rod body and an earplug, the battery is generally assembled in the rod body, a circuit board connected to the battery is arranged on one side of the earplug, which is close to the rod body, and the circuit board comprises a plurality of circuits and electronic components, such as a wireless transceiver module and the like. Still be equipped with sound production unit in the earplug, sound production unit generally includes moving coil loudspeaker or moving-iron loudspeaker, sound production unit receives the signal of telecommunication of circuit board and convert the signal of telecommunication into acoustic signal and transmit for people's ear.

Patent application No. 201920617475.3 of the republic of china discloses a wireless earphone, which is difficult to assemble due to insufficient size in a cavity caused by the fact that a battery of the wireless earphone is connected with a circuit board and a sound generating unit by connectors because the size of the wireless earphone is very small.

Disclosure of Invention

In view of the above, there is a need for a wireless headset that is easier to assemble.

In order to solve the above technical problem, the present application provides a wireless earphone, including a housing, a circuit unit, a battery and a sound generating unit assembled in the housing, where the housing includes a rod body having a first portion and a second portion, a back shell, a front shell, a plug-in body, and a base fastened to the bottom of the rod body, the circuit unit includes a circuit board and a flexible circuit connected to the circuit board, a first cavity extending in a vertical direction is formed in the rod body, a second cavity extending in a front-back direction and communicating with the first cavity is formed in the back shell, a third cavity is formed in the front shell, the circuit board is accommodated and fixed in the first cavity, the flexible circuit extends into the third cavity along the bottom walls of the first cavity and the second cavity, the battery is fixed in the second cavity, and the sound generating unit is fixed in the third cavity, the battery is connected with the circuit board or the flexible circuit, and the sound production unit is connected with the flexible circuit.

Preferably, the flexible circuit includes a vertical connecting portion connected to the circuit board and extending upward along the first cavity, a horizontal extending portion formed by bending the vertical connecting portion and extending along the bottom wall of the second cavity, a vertical extending portion formed by bending the horizontal extending portion and extending upward, and a forward extending portion formed by bending the vertical extending portion and extending into the third cavity.

Preferably, the circuit board includes a first end electrically connected to the base and a second end facing the second cavity, and the battery is located in the second cavity between the second end and the vertical extension of the flexible circuit.

Preferably, the rod body and the first part and the second part of the shell are initially separated, the circuit board is arranged between the first part and the second part and then the first part and the second part are buckled into a whole, the first part and the second part of the rod body are respectively provided with a groove for limiting the left side and the right side of the circuit board, and the width of the groove is greater than the thickness of the circuit board.

Preferably, the rear side wall outside of backshell is equipped with a plurality of supports respectively the support sand grip of battery, the second tip rear side of circuit board is equipped with the spliced pole and is fixed in the terminal supporting pad of spliced pole, the supporting pad support in support on the backshell rear side wall between the sand grip.

Preferably, the battery is fixed to the front side of the second end portion of the circuit board through adhesive bonding, the vertical extending portion of the flexible circuit is located between the battery and the sound generating unit and extends, and the battery is connected to the flexible circuit.

Preferably, the sound producing unit includes moving coil loudspeaker and moving iron loudspeaker, preceding shell still includes certainly the third cavity protrusion extends the income ear that forms, runs through go into ear and intercommunication the fourth cavity of third cavity, moving iron loudspeaker at least part inserts in the fourth cavity, moving coil loudspeaker is fixed in the third cavity, flexible line's preceding extension respectively in the third cavity with moving coil loudspeaker and moving iron horn electricity are connected.

Preferably, a plurality of components are integrated on the circuit board and the flexible circuit to receive radio signals and perform noise reduction processing.

Preferably, the front shell and the rear shell are buckled with each other in a buckling manner, an extension cavity is formed between the second cavity and the third cavity, and the extension cavity can partially accommodate the moving coil loudspeaker and the battery.

In order to solve the above technical problem, the present application further provides a wireless headset assembling method, for assembling the wireless headset, including the following steps:

s10, providing a circuit unit, a sound production unit and a battery, and connecting or welding the sound production unit and the battery on the circuit unit;

the flexible circuit extends to the upper part of the front side of the battery along the bottom of the battery, the battery is welded or connected to the circuit board or the flexible circuit, and the sound production unit is connected to the flexible circuit;

s20, providing a rod body and a shell of the first part and the second part, placing the circuit board between the first part and the second part and buckling the first part and the second part into a whole;

s30, providing a front shell, and buckling the front shell on the rear shell after the sound generating unit is arranged in the front shell;

s40, providing a plug-in body, and sleeving the plug-in body outside the front shell; and simultaneously, buckling the base into the bottom of the rod body so as to electrically connect the circuit board and the base together.

According to the wireless earphone and the assembling method thereof, the flexible circuit replaces the connector, the circuit unit is connected with the sound generating unit and the battery in advance, the assembling process is simplified, and the assembling efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a perspective assembly view of a wireless headset according to the present application;

FIG. 2 is an exploded perspective view of the wireless headset of the present application;

FIG. 3 is an exploded perspective view of the wireless headset of the present application from another angle;

fig. 4 is a perspective view of a portion of a housing of a wireless headset of the present application;

FIG. 5 is a perspective view of a front housing of the wireless headset of the present application;

FIG. 6 is a perspective view of the plug body of the wireless headset of the present application;

FIG. 7 is an exploded perspective view of a base of the wireless headset of the present application;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 9 is a cross-sectional view taken along the line B-B in FIG. 1;

fig. 10 is a sectional view taken along the dotted line C-C shown in fig. 1.

Description of reference numerals:

-a housing-10; a rod body-11; a first portion-101; a second part-102; a first cavity-111; a groove-112; -a rear shell-12; a second lumen-121; an extension cavity-122, 132; a buckling part-123; a first aperture-124; support ribs-125; a front shell-13; a front housing-131; a third chamber-137; ear-133; a fourth cavity-134; a chamber wall-135; a first acoustic port-136; an insertion body-14; a protective wall-141; a joint-142; an engagement hole-143; film-151, 152, 153; a rubber pad-16; a base-20; an insulating base body-21; arcuate bottom-211; an engagement portion-213; a receiving cavity-214; a waterproof ring pad-22; a loop body-221; a through-hole-222; connecting seat-23; a connecting plate-231; a charging post-232; a charging module-233; a circuit unit-30; a circuit board-31; a first end-311; a second end-312; component-313, 325; a connecting post-315; a support pad-314; -a flexible circuit-32; a vertical connecting end-321; a horizontal extension-322; a vertical extension-323; a forward extension-324; a battery-40; a moving coil loudspeaker-51; moving iron horn-52.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments.

In the present application, as shown in fig. 1, the X direction is the front in the front-rear direction, the Y direction is the left-right direction, and the Z direction is the lower side in the vertical direction.

Referring to fig. 1 to 6 and 10, the wireless headset of the present invention includes ahousing 10, acircuit unit 30 assembled in thehousing 10, abattery 40 and a sound generating unit. The sound generating unit is connected to thebattery 40 through thecircuit unit 30, thebattery 40 provides electric energy, and thecircuit unit 30 includes acircuit board 31, aflexible circuit 32 and acomponent 33313,325 arranged on thecircuit board 31 and/or theflexible circuit 32. Thecircuit unit 30 plays a role in transmitting electric energy, receiving and denoising electric signals, and then transmitting the electric signals to the sound generating unit.

Theshell 10 comprises a vertically extendingrod body 11, arear shell 12 formed at the top end of therod body 11, afront shell 13 fixed with therear shell 12 in a matching manner, and a plug-inbody 14 connected to thefront shell 13. Therod body 11 and therear shell 12 are of an integral structure and are divided into a leftfirst part 101 and a rightfirst part 102, and thefirst part 101 and thesecond part 102 are buckled with each other to form a whole.

Therod body 11 encloses afirst cavity 111 formed by extending in the vertical direction, andgrooves 112 are formed in the left side and the right side of thefirst cavity 111 respectively. The bottom of therod body 11 is in an open state, and thebase 20 is fastened to the bottom of therod body 11. Therear case 12 is divided into afirst portion 101 and asecond portion 102 as well as therod 11, and therear case 12 includes asecond cavity 121 extending in the front-rear direction and communicating with thefirst cavity 111. The inner diameter of therear shell 12 increases gradually from back to front, anextension cavity 122 is formed at the outer periphery of the front side of thesecond cavity 121, abuckling part 123 is formed at the outer periphery of theextension cavity 122, afirst hole 124 is formed at the top of theextension cavity 122, amembrane 151 is attached to thefirst hole 124, and themembrane 151 is of a microporous dustproof structure. The joint of thefirst cavity 111 and thesecond cavity 121 is provided with a plurality ofsupport ribs 125 at the position of the rear wall of therod 11.

Thefront shell 13 includes afront shell 131, athird cavity 137 disposed on one side of thefront shell 131 far away from therear shell 12, anextension cavity 132 located on the periphery of thethird cavity 137, acavity wall 135 formed between thethird cavity 137 and theextension cavity 132, an ear-enteringpart 133 formed by forward protruding of thethird cavity 137, and afourth cavity 134 penetrating the ear-enteringpart 133 and communicating with thethird cavity 137. After thefront shell 13 is fixed to therear shell 12 by snap fit, theextension cavity 132 of thefront shell 13 and theextension cavity 122 of therear shell 12 cooperate to form acomplete extension cavity 122, 132. Afirst sound hole 136 is formed in the front side wall of thethird cavity 137, amembrane 152 is attached to the inner side of thefirst sound hole 136, and themembrane 152 has a structure consistent with that of themembrane 151 and is a microporous mesh structure.

The plug-inbody 14 is made of soft rubber material, and the plug-inbody 14 includes aprotection wall 141, anengagement portion 142 formed by extending backward from the middle of theprotection wall 141, and anengagement hole 143 penetrating through theengagement portion 142. Theengagement hole 143 is sleeved outside theear insertion portion 133 of thefront housing 13, afilm 153 is further fixed in theengagement hole 143, and thefilm 153 is of a mesh structure.

As shown in fig. 7, thebase 20 includes aninsulating base 21, awaterproof gasket 22 fixed in theinsulating base 21, and a connectingseat 23. Theinsulating base 21 includes anarc bottom 211, afastening portion 213 extending upward, and areceiving cavity 214. Thewaterproof ring gasket 22 is buckled on the bottom of theaccommodating cavity 214, and thewaterproof ring gasket 22 includes aring body 221 and a plurality of throughholes 222 vertically penetrating through thering body 221. Theconnection holder 23 includes aconnection plate 231, acharging post 232 fixed to a lower side of theconnection plate 231, and acharging module 233 disposed on an upper surface of theconnection plate 231 and communicating with thecharging post 232. The connectingseat 23 is buckled into theaccommodating cavity 214, and thecharging post 232 extends downwards along the throughhole 222 of thewaterproof gasket 22 and is exposed on the lower surface of the arc-shaped bottom 211 of the insulatingseat 21 to connect with a charging box for charging. The chargingpost 232 is pressed against the throughhole 222 of thewaterproof gasket 22 to seal, and thewaterproof gasket 22 is pressed against the inner wall surface of theaccommodating chamber 214 to seal.

As shown in fig. 2, fig. 3, fig. 8, and fig. 9, thecircuit board 31 of thecircuit unit 30 is fixed in thefirst cavity 111 along the vertical direction, the left and right sides of thecircuit board 31 are respectively limited in thegroove 112, and the width of thegroove 112 is slightly larger than the thickness of thecircuit board 31. Thefirst end 311 of thecircuit board 31 is electrically connected to thecharging module 232 in thebase 20, and the connection mode may be implemented by welding a connection elastic sheet on thefirst end 311 of thecircuit board 31. The front side of thesecond end 312 of thecircuit board 31 faces thesecond chamber 121, aconnection post 315 is fixed to the rear side of thesecond end 312, asupport pad 314 is disposed on theconnection post 315, thesupport pad 314 is supported on the wall surface of therear case 12 to support the position of thecircuit board 31, and thesupport pad 314 is made of an elastic support material to realize a certain displacement space. Theflexible circuit 32 includes a vertical connectingportion 321 connected to the middle or thefirst end portion 311 of thecircuit board 31 along the vertical direction, a horizontal extendingportion 322 bent from the upper side of the vertical connectingportion 311 and extending along the bottom wall of thesecond cavity 121 into the extending cavities 122,132, a vertical extendingportion 323 bent and extending upward from the horizontal extendingportion 322, and a forward extendingportion 324 extending forward from the vertical extendingportion 323 into thethird cavity 137.

Thesecond cavity 121 is located between thesecond end 312 of thecircuit board 31 and thevertical extension 323 of theflexible circuit 32, and thesecond cavity 121 is used for installing and fixing thebattery 40. A plurality ofsupport ribs 125 at the rear side of therear case 12 are located at the periphery of thesupport pad 314 and limit and support the rear side of thebattery 40. Thecircuit board 31 with be equipped with a plurality of components and parts 313,325 on theflexible circuit 32, components and parts 313,325 are used for realizing wireless receiving signal of telecommunication, will the signal of telecommunication carries out the transmission after the noise reduction and gives sound generating unit.

The sound production unit comprises a movingcoil loudspeaker 51 and a movingiron loudspeaker 52, and the volume of the movingiron loudspeaker 52 is smaller than that of the movingcoil loudspeaker 51. The movingcoil loudspeaker 51 is assembled and fixed in thethird cavity 137, the movingiron loudspeaker 52 is inserted into thefourth cavity 134 and partially exposed in thethird cavity 137, and theflexible circuit 32 is welded and fixed with the movingcoil loudspeaker 51 and the movingiron loudspeaker 52 in thethird cavity 137 or connected through a connector. Theforward extension 324 of theflexible circuit 32 extends along the top of the movingcoil horn 51 and then extends obliquely toward thefourth cavity 134. The bottom of the movingcoil loudspeaker 51 is also provided with arubber pad 16 for supporting the movingcoil loudspeaker 51. Anear sensor 33 is further arranged in thehousing 10, and theear sensor 33 is connected with theflexible circuit 32 and transmits an electric signal.

This application wireless headset is through being fixed incircuit board 31 in thefirst cavity 111 of the body ofrod 11, and locate the battery in thesecond cavity 121 ofbackshell 12, rethreadflexible circuit 32 comes connectingcircuit board 31,battery 40 and sound generating unit, avoids the tradition to adopt the connector to connect the problem that battery, circuit board and sound generating unit caused with high costs, occupation space are big.

Meanwhile, the movingiron unit 52 is placed in thefourth cavity 134 of the ear-inportion 133 of thefront housing 13, so that the space of the ear-inportion 133 can be greatly utilized, and the space becomes a component assembling space, rather than being simply used as a sound transmission channel.

This application wireless headset passes through structural design's change, has realized more outstanding assembly process in order to promote packaging efficiency, reduce the human cost. The assembling method of the wireless earphone comprises the following steps:

s10, providing acircuit unit 30, a sound generating unit and abattery 40, and connecting the sound generating unit with thebattery 40 or welding the sound generating unit on thecircuit unit 30;

the step is to connect thecircuit unit 30, the sound generating unit and thebattery 40 into a whole, so as to facilitate subsequent assembly. The step specifically includes that thecircuit board 31 and theflexible circuit 32 are connected by an FPC connector, thebattery 40 can be adhered to thefirst end 312 of thecircuit board 31 by gluing, theflexible circuit 32 extends to the upper front side of thebattery 40 along the bottom of thebattery 40, and thebattery 40 can be welded or connected to thecircuit board 31 or theflexible circuit 32. The sound generating unit and theear sensor 33 are both connected to theflexible circuit 32.

S20, providing therod 11 and theshell 12 of thefirst part 101 and thesecond part 102, placing thecircuit board 31 between thefirst part 101 and thesecond part 102, and fastening thefirst part 101 and thesecond part 102 into a whole;

in this step, the left and right sides of thecircuit board 31 are respectively limited in thegrooves 112 of thefirst portion 101 and thesecond portion 102. The supportingpad 314 at the rear side of thesecond end 312 of thecircuit board 31 abuts against the rear sidewall of therear housing 12 to support thecircuit board 31, and theflexible circuit 32 extends along the bottom walls of thefirst cavity 111 and thesecond cavity 121. Thebattery 40 is clamped in thesecond cavity 121 enclosed by thefirst portion 101 and thesecond portion 102 after the snap-fit, and the rear side of thebattery 40 abuts against thesupport rib 125 on the rear side wall of therear shell 12.

It should be noted that thebattery 40 may not be fixed to thecircuit unit 30, but may be assembled into thesecond cavity 121 after thefirst unit 101 and thesecond unit 102 are fastened together and connected to theflexible circuit 32. Theflexible circuit 32 is a flexible member, and in this case, thevertical extension 323 is not initially formed and is in a front-to-rear extension state.

S30, providing afront shell 13, and buckling thefront shell 13 on therear shell 12 after the sound generating unit is installed in thefront shell 13;

in this step, the sound generating unit includes a movingcoil speaker 51 and a movingiron speaker 52, and the movingiron speaker 52 is at least partially inserted into thefourth cavity 134, and then the movingcoil speaker 51 is buckled into thethird cavity 137. Finally, thefront housing 13 and therear housing 12 are fastened together, in the process, thevertical extension 323 of theflexible circuit 32 is located between the front side of thebattery 40 and the movingcoil speaker 51, and thevertical extension 323 does not mean a vertical extension, and includes, but is not limited to, a vertical extension and an oblique upward extension.

S40, providing the pluggingbody 14, and sleeving thejoint hole 143 of the pluggingbody 14 on the periphery of theear inserting part 133 of thefront shell 13; meanwhile, thebase 20 is buckled into the bottom of therod 11 so that thecircuit board 31 and the chargingpost 232 are electrically connected together.

According to the assembling method of the wireless earphone, theflexible circuit 32 replaces a connector, thecircuit unit 30 and the sound generating unit are connected with thebattery 40 in advance, the assembling process is simplified, and the assembling efficiency is improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A wireless earphone comprises a shell, a circuit unit, a battery and a sound production unit, wherein the circuit unit, the battery and the sound production unit are assembled in the shell, the shell comprises a rod body with a first part and a second part, a rear shell, a front shell, a plug-in body and a base buckled at the bottom of the rod body, the wireless earphone is characterized in that the circuit unit comprises a circuit board and a flexible circuit connected to the circuit board, a first cavity extending along the vertical direction is formed in the rod body, a second cavity extending along the front-rear direction and communicated with the first cavity is formed in the rear shell, a third cavity is formed in the front shell, the circuit board is contained and fixed in the first cavity, the flexible circuit extends into the third cavity along the bottom walls of the first cavity and the second cavity, the battery is fixed in the second cavity, and the sound production unit is fixed in the third cavity, the battery is connected with the circuit board or the flexible circuit, and the sound production unit is connected with the flexible circuit.

2. The wireless headset of claim 1, wherein the flexible circuit includes a vertical connection portion connected to the circuit board and extending upward along the first cavity, a horizontal extension portion bent from the vertical connection portion and extending along the bottom wall of the second cavity, a vertical extension portion bent and extending upward from the horizontal extension portion, and a forward extension portion bent and extending from the vertical extension portion into the third cavity.

3. The wireless headset of claim 2, wherein the circuit board includes a first end electrically connected to the base and a second end facing the second cavity, the battery being located in the second cavity between the second end and the vertical extension of the flexible circuit.

4. The wireless earphone according to claim 3, wherein the lever body is initially separated from the first portion and the second portion of the housing, the circuit board is placed between the first portion and the second portion, and then the first portion and the second portion are fastened together into a whole, the first portion and the second portion of the lever body are respectively provided with grooves for limiting the left side and the right side of the circuit board, and the width of the groove is greater than the thickness of the circuit board.

5. The wireless earphone according to claim 4, wherein a plurality of support ribs for supporting the battery are respectively disposed on the outer side of the rear sidewall of the rear case, the rear side of the second end portion of the circuit board is provided with a connection post and a support pad fixed to the end of the connection post, and the support pad is supported on the rear sidewall of the rear case between the support ribs.

6. The wireless headset of claim 5, wherein the battery is fixed to the second end front side of the circuit board by adhesive bonding, the vertical extension of the flexible circuit extends between the battery and the sound unit, and the battery is connected to the flexible circuit.

7. The wireless earphone according to claim 6, wherein the sound generating unit comprises a moving coil speaker and a moving iron speaker, the front housing further comprises an ear-entering portion formed by extending from the protrusion of the third cavity, a fourth cavity penetrating the ear-entering portion and communicating with the third cavity, the moving iron speaker is at least partially inserted into the fourth cavity, the moving coil speaker is fixed in the third cavity, and the forward extending portion of the flexible circuit is respectively electrically connected with the moving coil speaker and the moving iron speaker in the third cavity.

8. The wireless headset of claim 7, wherein the circuit board and the flexible circuit have integrated components to receive radio signals and perform noise reduction processing.

9. The wireless headset of claim 8, wherein the front housing and the rear housing snap-fit to each other and an extension cavity is formed between the second cavity and the third cavity, the extension cavity partially receiving the moving coil speaker and the battery.

10. A method of assembling a wireless headset of claim 1, comprising the steps of:

s10, providing a circuit unit, a sound production unit and a battery, and connecting or welding the sound production unit and the battery on the circuit unit;

the flexible circuit extends to the upper part of the front side of the battery along the bottom of the battery, the battery is welded or connected to the circuit board or the flexible circuit, and the sound production unit is connected to the flexible circuit;

s20, providing a rod body and a shell of the first part and the second part, placing the circuit board between the first part and the second part and buckling the first part and the second part into a whole;

s30, providing a front shell, and buckling the front shell on the rear shell after the sound generating unit is arranged in the front shell;

s40, providing a plug-in body, and sleeving the plug-in body outside the front shell; and simultaneously, buckling the base into the bottom of the rod body so as to electrically connect the circuit board and the base together.

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