CN217009673U - Locking device - Google Patents

Abstract

The application relates to a locking device, which particularly comprises a first connector and a second connector plugged with the first connector; the first connector includes a body portion including a receiving cavity; the body part comprises a first end part which is used for being plugged with the second connector, and the outer wall part of the first end part is provided with a first limiting part; the rubber core is fixed in the accommodating cavity and comprises a rubber core body, the rubber core body comprises an inserting part and an inserting cavity positioned in the inserting part; the rubber core body is provided with a second limiting part; the second connector comprises a second accommodating cavity and a second plugging part which is convexly arranged in the second accommodating cavity; when the first connector and the second connector are plugged, the first end portion is located in the second accommodating cavity, and the second plugging portion is located in the plugging cavity. The locking device is convenient to assemble, small in size, good in waterproof performance and firm in clamping.

Description

Locking device

Technical Field

The utility model relates to the technical field of connectors, in particular to a locking device.

Background

The electric connector is a bridge for all signals, the quality of the electric connector can affect the reliability of current signal transmission, and is closely related to the operation of various electronic systems and electrical equipment. The traditional electric connector has a complex structure, the plug and the socket are not convenient to plug, and the production cost is high. In addition, some conventional electrical connectors are not designed to be fool-proof between the plug and the socket, and the situation of reverse insertion exists in the process of inserting the plug and the socket, so that connection failure is caused, and the connector or the circuit is damaged under the serious situation.

The male terminal is generally installed in the plug, and the conventional electric connector is not reasonable enough in male terminal design, complex in structure, high in manufacturing cost, not convenient to install and not easy to replace when damaged. Meanwhile, due to the influence of structural design, the traditional locking device cannot be small in size, occupies more space when being installed on equipment such as a case, is low in space utilization rate and is not beneficial to the miniaturization design of the equipment. In addition, under the condition that the electric connector is not used, the board end and the wire end need to be separated, the board end is internally provided with the board end terminal, and the traditional electric connector is not designed with a sealing cover structure, so that dust is easily accumulated in the board end under the condition that the electric connector is not used for a long time, and the phenomenon of poor contact can exist when the electric connector is used again.

Therefore, in combination with the above-mentioned technical problems, a new technical solution is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a locking device, which is small in size, convenient to install, and firm in clamping.

The application provides a locking device, comprising a first connector; the first connector comprises a body part, and the body part is provided with a containing cavity positioned in the body part; the body part comprises a plug-in port positioned at one end and a first end part arranged close to the plug-in port, and the first end part is provided with a first limiting part; the rubber core comprises a rubber core body, the rubber core body comprises an insertion part and an insertion cavity positioned in the insertion part; the plug part is provided with a second limiting part matched with the first limiting part so as to clamp the rubber core in the accommodating cavity of the body part, and the opening of the plug cavity is arranged close to the plug port.

Preferably, the rubber core body is located in the accommodating part at one end of the inserting part, the inserting part comprises a wall part surrounding the inserting cavity, and the second limiting parts are arranged on two opposite sides of the wall part.

Preferably, the second limiting part comprises an elastic part and limiting bulges positioned on two sides of the elastic part; a gap is formed between the wall portion and the elastic portion in a circumferential direction of the wall portion; the wall part further comprises inner wall parts arranged opposite to the elastic parts, and the inserting cavity is positioned between the opposite inner wall parts.

Preferably, a rib is arranged on one side of the inner wall part close to the elastic part to limit the displacement of the elastic part in the thickness direction of the rubber core body.

Preferably, the rubber core body further comprises a through hole penetrating through the insertion part and the accommodating part, the through hole is used for inserting a circuit board, and an output terminal of the circuit board is inserted into the through hole and located in the insertion cavity.

Preferably, the body further includes a locking line portion located at one end of the first end portion, the first limiting portion includes a first through hole and a second through hole penetrating through the first end portion in the thickness direction of the body, the first through hole penetrates through the insertion port of the first end portion in the direction from the first end portion to the locking line portion, and is used for accommodating the elastic portion, and the second through hole is used for accommodating the limiting protrusion.

Preferably, the side surface of the limiting protrusion close to the accommodating part is a first guide inclined surface; and a second guide inclined plane matched with the first guide inclined plane is arranged in the inserting port of the first end part.

Preferably, the first through hole is a U-shaped through hole communicated with the socket;

the first through holes are respectively arranged on the opposite side walls of the first end part, and the two second through holes are arranged on the side walls and positioned at two sides of the first through holes.

Preferably, the first through hole and the second through hole communicate with each other in a direction from the first end portion to the locking line portion; one end of the first through hole, which is far away from the second through hole, is communicated with the interface; the length of the second through hole is greater than or equal to the length of the first through hole.

Preferably, the connector comprises a second connector inserted into the first connector, the second connector comprises a second body part, the outer wall part of the body part is provided with a first clamping part, the outer wall part of the second body part is provided with a second clamping part matched with the first clamping part, the first clamping part is provided with a limiting buckle, the second clamping part is provided with a limiting groove, when the first connector and the second connector are inserted, the first clamping part and the second clamping part are buckled, the bottom of the limiting buckle is positioned at the bottom of the limiting groove, and an included angle between the bottom of the limiting groove and the side wall of the limiting groove is smaller than 90 °.

The second body part comprises a second accommodating cavity and a second inserting part convexly arranged in the second accommodating cavity, two rows of terminal cavities penetrating through the second inserting part are arranged in the second inserting part, and the plurality of terminals are respectively clamped in the terminal cavities; when the second connector is plugged with the first connector, the first end of the first connector is inserted into the second accommodating cavity, and the output terminals of the circuit board in the plugging cavity are inserted into the gap between the two rows of terminal cavities, so that the output terminals are electrically connected with the contact parts of the two rows of terminals.

The present application provides a locking device. Specifically, the device comprises a first connector; the first connector comprises a body part, and the body part is provided with an accommodating cavity positioned in the body part; the body part comprises a socket at one end and a first end part arranged close to the socket, and the first end part is provided with a first limiting part; the rubber core comprises a rubber core body, the rubber core body comprises an insertion part and an insertion cavity positioned in the insertion part; the plug part is provided with a second limiting part matched with the first limiting part so as to clamp the rubber core in the accommodating cavity of the body part, and the opening of the plug cavity is arranged close to the plug port. The connector has the advantages of convenient formula, small volume and firm clamping.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic disassembled view of a first connector of the present application;

FIG. 2 is a disassembled structural schematic view of a second connector of the present application;

FIG. 3 is a schematic disassembled view of the first and second connectors of the present application;

fig. 4 is another view of fig. 3.

Reference numerals:

1. a first connector; 10 a body portion; 100 accommodating cavities; 1000 interface; 1001 second lead bevel; 11 a first end portion; 110 a first limiting part; 111 a first via; 112 a second via hole; 113 an accommodating recess; 12 a wire locking portion; 13 a first catch; 130 limiting buckle; 131 the bottom of the buckle; 14 a first seal ring; 15, plugging the plug; 16 a locking member; 17 unlocking the lock;

2 a second connector; 20 a second body portion; 200 a second receiving cavity; 201 outer wall portion; 202 a second catch; 203 the side wall of the limit groove and 204 the bottom of the limit groove; 21 a second mating part; 210 terminal cavities; 22 a third mating portion;

3, gluing a rubber core; 30 rubber core body; 300 through holes; 31 a plug-in part; 310 a plug cavity; 311 a wall portion; 3111 an inner wall portion; 312 an elastic part; 313 limiting protrusion; 314 gap; 3130 a first guiding bevel; 32 a housing part; 320 an accommodating cavity; 321 rubber core lockhole; 4 terminals; 5 a second sealing ring; 7 a circuit board; 70 an output terminal; 71 lockwire hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

In order to solve the above problems, the applicant proposed a locking device.

The application provides a locking device, which particularly comprises a first connector; the first connector comprises a body part, and the body part is provided with a containing cavity positioned in the body part; the body part comprises a socket at one end and a first end part arranged close to the socket, and the first end part is provided with a first limiting part; the rubber core comprises a rubber core body, the rubber core body comprises an insertion part and an insertion cavity positioned in the insertion part; the plug part is provided with a second limiting part matched with the first limiting part so as to clamp the rubber core in the accommodating cavity of the body part, and the opening of the plug cavity is close to the plug interface. This application realizes a convenient assembling, and is small, and the firm, the good locking device of waterproof performance of joint.

Reference is made in particular to the locking device shown in figures 1-4.

The application provides a locking device, which particularly comprises a first connector 1 and a second connector 2 plugged with the first connector; the first connector 1 includes a body 10, and the body 10 has a receiving cavity 100 inside the body. The main body 10 includes a socket 1000 at one end, and a first end 11 disposed close to the socket, the first end 11 is used for being plugged with the second connector 2, and the main body 10 further includes a locking wire portion 12 at one end of the first end 11 far from the socket. A first limiting part 110 is arranged on an outer wall part of the first end part 11, the first limiting part 110 comprises a first through hole 111 and a second through hole 112, the first through hole 111 and the second through hole 112 penetrate through two opposite side walls of the first end part 11 in the thickness direction, and in the direction from the insertion port 1000 to the locking wire part 12, the first through hole 111 is communicated with the insertion port 1000 of the first end part 11; the first through hole 111 and the second through hole 112 are used for stopping a limiting part positioned on the rubber core.

Specifically, in the direction from the first end portion 11 to the locking line portion 12, the first through hole 111 communicates with the socket 1000 of the first end portion 11, and the first through hole 111 is a U-shaped through hole communicating with the socket 1000; the first through holes 111 are respectively disposed on opposite sidewalls of the first end portion 11, and two of the second through holes 112 are disposed on the sidewalls and located at two sides of the first through holes 111;

or,

a T-shaped through hole through which the first through hole 111 and the second through hole 112 communicate in a direction from the first end portion 11 to the locking line portion 12; one end of the first through hole 111 far away from the second through hole 112 is communicated with the socket 1000. The length of the second through hole 112 is greater than that of the first through hole 111, so that the first limiting portion 110 forms a T-shaped through hole. This application sets up first through-hole 111 and interface 1000 intercommunication, and when being convenient for follow-up when accommodating the intracavity equipment rubber core, spacing portion on the rubber core passes through and blocks in the first through-hole.

The rubber core 3 is fixed in the accommodating cavity 100, the rubber core 3 comprises a rubber core body 30, the rubber core body 30 comprises an insertion part 31 and an insertion cavity 310 positioned in the insertion part 31; the rubber core body 30 is provided with a second limiting portion which is matched with the first limiting portion 11, so as to clamp the rubber core 3 in the accommodating cavity 100 of the body portion 10. The opening of the plugging cavity 310 is arranged close to the plugging port 1000, and preferably, the end surface of the plugging port 1000 is flush with the end surface of the opening of the plugging cavity 310; when the rubber core is clamped in the accommodating cavity, and the opening of the inserting cavity is flush with the end face of the inserting port, the first connector and the second connector can be conveniently inserted, and the output terminal on the circuit board in the inserting cavity can be better inserted with the terminal of the second connector.

The rubber core body 30 comprises an accommodating part 32 positioned at one end of the inserting part 31, the inserting part 31 comprises a wall part 311 surrounding the inserting cavity 310, and the second limiting parts are arranged on two opposite sides of the wall part. The second limiting part comprises an elastic part 312, limiting protrusions 313 are arranged on the elastic part 312 respectively, the elastic part further comprises a pressing part close to the opening of the inserting cavity, and the limiting protrusions 313 are located on two sides of the pressing part. The pressing portion of the elastic portion 312 is accommodated in the first through hole 111, and the limiting protrusions 313 are respectively clamped and fixed in the second through holes 112. The side surface of the limiting protrusion 313 close to the accommodating part 32 is a first inclined guiding surface 3130; a second inclined guiding surface 1001 matched with the first inclined guiding surface 3130 is arranged in the socket 1000 of the first end portion 11.

Specifically, when the rubber core body 30 is inserted into the receiving cavity 100 of the body 10 from the socket 1000 of the body 10, the first guiding inclined surface 3130 of the limiting protrusion contacts with the second guiding inclined surface 1001 of the socket, and the limiting protrusion is guided into the inner wall of the receiving cavity by two matching guiding inclined surfaces; when the rubber core body further pushes towards the accommodating cavity, the limiting bulge is clamped in the second through hole, and the pressing part of the elastic part is accommodated in the first through hole. When the rubber core is required to be separated from the body part, the pressing part on the elastic part which is oppositely arranged is only required to be pressed, so that the limiting bulges arranged on the elastic part are driven to move towards the directions which are close to each other, the limiting bulges clamped in the second through holes can be separated from the second through holes, the rubber core and the body part can be conveniently disassembled and installed, and the stability is high.

Preferably, a gap 314 is formed between the wall portion 311 and the elastic portion 312 in the circumferential direction of the wall portion to enhance the elastic performance of the elastic portion. The wall 311 further includes an inner wall 3111 opposite to the elastic portion 312, and a rib is disposed on one side of the inner wall 3111 close to the elastic portion 312 to limit the displacement of the elastic portion 312 in the thickness direction of the rubber core body 30.

Preferably, the plugging cavity 310 is located between the inner wall portions 3111 that are oppositely disposed, so as to prevent the usage space of the plugging cavity from being affected by the arrangement of the elastic portion, and also protect the output terminals of the circuit board disposed in the plugging cavity from being squeezed.

Preferably, the rubber core body 30 further includes a through hole 300 penetrating through the insertion part 31 and the accommodating part 32, the through hole 300 is used for inserting the circuit board 7, and the output terminal 70 of the circuit board 7 is inserted into the through hole 300 and exposed in the insertion cavity 310.

Specifically, a through hole for accommodating the circuit board 7 is formed in the rubber core body 30, an output terminal is arranged at an output end of the circuit board, the output terminal is inserted into the insertion part 31 from the accommodating part 32 through the through hole and is exposed in the insertion cavity 310, so that the output terminal is inserted into a terminal of the second connector to realize electrical connection.

The output terminals 70 on the circuit board 7 are respectively located on opposite side surfaces of the output end of the circuit board, and one side surface is provided with a signal connector, and the other side surface is provided with a plurality of lock wire holes 71, wherein the lock wire holes 71 are used for locking and fixing external cables; and part of the output terminals are electrically connected with the signal connector, and the rest of the output terminals are electrically connected with the cable. The accommodating part 32 of the rubber core body 30 is provided with an accommodating cavity 320, and the wire locking hole and the signal connector of the circuit board are both positioned in the accommodating cavity 320; the outer wall surface of the accommodating part 21 is further provided with a rubber core wire locking hole 321 penetrating through the outer wall surface so as to lock and fix an external cable together with the wire locking hole 71 on the circuit board.

Preferably, the plastic core 3 with the circuit board mounted thereon is fixed in the accommodating cavity 100 of the main body 10 through a second limiting portion disposed on the plastic core body. The external cable is locked by the locking wire part 12 on the body part, and the cable is prevented from rotating in the accommodating cavity to cause damage.

In a preferred embodiment, the first end portion 11 is provided with a receiving groove 113 at an outer periphery thereof, and the first sealing ring 14 is clamped in the receiving groove 113, so as to improve the water-oxygen sealing performance when the first connector 1 and the second connector 2 are plugged. The first connector further comprises a plug 15 located in the accommodating cavity 100, and the plug is used for limiting the external cable to rotate in the accommodating cavity. The first connector further comprises a locking piece 16 locked outside the locking line part 12, and an unlocking piece 17 positioned between the body part 11 and the locking line part 12; when retaining member 16 need be disassembled, need unblock earlier unblock piece 17, the fastening security of the first connector locking line portion of guarantee prevents to lead to dropping because of using or in the transportation.

According to the structural schematic diagram of the locking connector shown in fig. 2-4, the second connector 2 includes a second body 20, the second body 20 includes a second receiving cavity 200 and a second inserting portion 21 protruding into the second receiving cavity, and a groove is formed between the second inserting portion 21 and an outer wall 201 of the second body 20. When the first connector 1 and the second connector 2 are plugged, the first end portion 11 is located in the groove of the second accommodating cavity 200, the second plugging portion 21 is located in the plugging cavity 310, and the terminal in the second plugging cavity can be electrically connected with the output terminal of the circuit board located in the plugging cavity.

Specifically, the second body portion 20 further includes a third insertion portion 22 located at one end of the second insertion portion 21, and the second body portion further includes two rows of terminal cavities 210 penetrating through the third insertion portion 22 and the second insertion portion 21, and a second through hole located in the two rows of terminal cavities 210. The plurality of terminals 4 are respectively clamped in the terminal cavities 210, and the contact portions of the plurality of terminals are respectively exposed from the terminal cavities in the second through holes. When the second connector 2 is plugged with the first connector 1, the first end 11 of the first connector 1 is inserted into the second accommodating cavity 200, and the output terminals 71 of the circuit board 7 located in the plugging cavity 310 are inserted into the second through holes between the two rows of terminal cavities 210 and are in contact with the contact parts of the terminals 4 to realize electrical connection.

In a preferred embodiment, the outer wall of the main body 10 of the first connector is provided with a first retaining portion 13, and the first retaining portion 13 is located on the opposite side wall of the main body, and has one end fixed to the side wall and the other end as a free end. The first retaining part 13 is provided with a limiting buckle 130, when the first connector 1 and the second connector are clamped and fixed, the first retaining part 13 can be fixed with the second retaining part on the second connector, and when unlocking is needed, the free end of the first retaining part 13 is pressed to unlock the limiting protrusion, so that the first connector and the second connector can be separated.

The outer wall 201 of the second body portion 20 of the second connector is further provided with a second clamping portion 202 matched with the first clamping portion 13, a limiting groove is arranged in the second clamping portion 202, when the first clamping portion 13 is buckled with the second clamping portion 202, the bottom 131 of the limiting buckle 130 is stopped at the bottom 204 of the limiting groove, and an included angle between the bottom 204 of the limiting groove and the side wall 203 of the limiting groove is smaller than 90 degrees, preferably, the included angle is smaller than or equal to 85 degrees. The limiting groove of the second clamping part is designed to be an inner buckling angle, so that the first clamping part is prevented from falling off due to the fact that the elastic sheet contracts the first clamping part caused by overlarge external force when the first clamping part is buckled with the second clamping part.

In a preferred embodiment, the third plugging portion 22 is further embedded with a second sealing ring 5, so that water and oxygen isolation can be realized when the third plugging portion 22 of the second connector is plugged with an external electrical connector.

First connector and second connector design of this application are full parcel formula, effectively ensure the compactness of connector. Specifically, the periphery of the first end of the first connector is provided with a first sealing ring 14, and when the first end of the first connector is inserted into the second accommodating cavity 200 of the second connector, the first sealing ring is clamped between the first end of the first connector and the inner wall of the second connector, so that water and oxygen are effectively prevented from invading.

In addition, when the first connector and the second connector of the application are plugged, a fool-proof structure is designed for preventing misplug, if a bulge is arranged in the plugging cavity 310 in the rubber core body 30 in the first connector, a groove matched with the bulge is arranged in the second plugging portion of the second connector, and the terminal and the circuit board in the first connector and the circuit board are prevented from being damaged due to misplug when the first connector and the second connector are plugged.

The application provides a locking device, which particularly comprises a first connector and a second connector inserted with the first connector; the first connector comprises a body part, and the body part comprises a containing cavity; the body part comprises a first end part which is used for being plugged with the second connector, and the outer wall part of the first end part is provided with a first limiting part; the rubber core is fixed in the accommodating cavity and comprises a rubber core body, the rubber core body comprises an inserting part and an inserting cavity positioned in the inserting part; the rubber core body is provided with a second limiting part matched with the first limiting part so as to clamp and fix the rubber core in the accommodating cavity of the body part; the second connector comprises a second body part, and the second body part comprises a second accommodating cavity and a second plug-in part which is convexly arranged in the second accommodating cavity; when the first connector and the second connector are plugged, the first end portion is located in the second accommodating cavity, and the second plugging portion is located in the plugging cavity. The locking device is convenient to assemble, small in size, convenient to install, firm in clamping and excellent in waterproof performance.

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

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. 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 locking device comprising a first connector;

the first connector comprises a body part, and the body part is provided with a containing cavity positioned in the body part;

the body part comprises a plug-in port positioned at one end and a first end part arranged close to the plug-in port, and the first end part is provided with a first limiting part;

the rubber core comprises a rubber core body, the rubber core body comprises an insertion part and an insertion cavity positioned in the insertion part; the plug part is provided with a second limiting part matched with the first limiting part so as to clamp the rubber core in the accommodating cavity of the body part, and the opening of the plug cavity is close to the plug interface.

2. The locking device of claim 1, wherein the rubber core body includes a receiving portion at one end of the insertion portion, the insertion portion includes a wall portion surrounding the insertion cavity, and the second limiting portions are disposed on opposite sides of the wall portion.

3. The locking device of claim 2, wherein the second stopper portion includes an elastic portion, and a stopper projection on the elastic portion; the elastic part further comprises a pressing part, the pressing part is close to the opening of the inserting cavity, and the limiting protrusions are located on two sides of the pressing part.

4. The locking device according to claim 3, wherein a gap is provided between the wall portion and the elastic portion in a circumferential direction of the wall portion.

5. A locking device according to claim 3, wherein the wall portion further comprises oppositely disposed inner wall portions opposite the resilient portion, the plug cavity being located between the oppositely disposed inner wall portions.

6. The locking device of claim 2, wherein the rubber core body further comprises a through hole penetrating through the insertion part and the accommodating part, the through hole is used for inserting a circuit board, an output end of the circuit board is provided with an output terminal, and the output end is inserted into the insertion part from the accommodating part through the through hole and is exposed out of the insertion cavity.

7. The locking device according to claim 3, wherein the body further comprises a locking line portion located on a side of the first end portion away from the insertion port, the first limiting portion comprises a first through hole and a second through hole, the first through hole and the second through hole penetrate through two opposite side walls of the first end portion in the thickness direction, and in the direction from the insertion port to the locking line portion, the first through hole is communicated with the insertion port of the first end portion; the first through hole is used for accommodating the limiting part, and the second through hole is used for accommodating the limiting protrusion.

8. The locking device of claim 7, wherein the side surface of the limiting protrusion close to the accommodating part is a first guide slope; and a second guide inclined plane matched with the first guide inclined plane is arranged in the insertion port of the first end part.

9. The locking device of claim 7, wherein the first through hole is a U-shaped through hole in communication with the socket;

the first through holes are respectively arranged on the opposite side walls of the first end part, and the two second through holes are arranged on the side walls and positioned at two sides of the first through holes;

or,

a T-shaped through hole through which the first through hole and the second through hole communicate in a direction from the first end portion to the locking line portion; one end of the first through hole, which is far away from the second through hole, is communicated with the socket; the length of the second through hole is greater than or equal to the length of the first through hole.

10. The locking device of claim 1, comprising a second connector to mate with the first connector, the second connector comprising a second body portion,

the connector comprises a body part and a second connector, wherein the outer wall part of the body part is provided with a first clamping part, the outer wall part of the second body part is provided with a second clamping part matched with the first clamping part, the first clamping part is provided with a limiting buckle, the second clamping part is internally provided with a limiting groove, when the first connector and the second connector are plugged, the first clamping part is buckled with the second clamping part, the bottom of the limiting buckle is only positioned at the bottom of the limiting groove, and an included angle between the bottom of the limiting groove and the side wall of the limiting groove is smaller than 90 degrees.

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