CN217823484U - Fastener linkage device of connector - Google Patents

Abstract

The utility model provides a buckle linkage device of a connector, which comprises a connector, a circuit board and a wire rod are arranged in the connector, and an assembly part and an installation part are arranged on the top wall; the clamping and buckling piece is provided with a main body part arranged on the assembling part, an extending part extending from the main body part, and an elastic part which is formed by the main body part extending in a protruding way towards the direction far away from the extending part and is positioned on the installing part, and the extending part is provided with a hooking and buckling part protruding out of the top wall and used for clamping and buckling with a butt joint female seat; and the linkage assembly is combined with the mounting part, so that the buckling part is positioned between the mounting part and the linkage assembly, and is provided with a first linkage part and a second linkage part, the second linkage part is connected with the first linkage part and the connector, the first linkage part is positioned above the elastic part and is provided with a pressing part, and when the second linkage part is pulled, the pressing part can be linked to push and press the elastic part to move and link the main body part, the extending part and the hooking part to elastically deflect for a distance.

Description

Snap linkage for connectors

technical field

The utility model relates to a connector, in particular to a buckle interlocking device of the connector with better electrical connection and buckling functions.

Background technique

In many consumer electronic products nowadays, for example, computer technology is changing with each passing day, and the development trend is also moving towards the direction of strong computing function, high speed and small size, so that the number of computer communication ports is also reduced. The standard plug is used on other equipment, so that the electrical connector can be positioned on a mating connector and electrically connected to it to transmit signals.

In addition to sockets, the communication ports in these devices are wire plugs or wire connectors that combine cables with plugs. Such wire plugs/wire connectors usually pull the wires directly during the plugging and unplugging process. When the wire plug/wire connector does not have any supporting or fixed structure, or when it is subjected to an external force along the up and down direction after being docked with the butt female connector, since the butt female connector is not subjected to the force of the wire connector Therefore, it is easy to cause the wire connector to fall off due to shaking or collision after being inserted into the female connector, thereby affecting the transmission of signals.

Utility model content

In order to effectively solve the above problems, the purpose of this utility model is to provide a buckle linkage device of the connector, which connects the first linkage piece and the housing through the second linkage piece, and utilizes the hook The buckle protrudes upwards and the top wall is buckled with the docking female seat, or when the second link is pulled, the first link presses down and the driven part moves down, so that the hook part elastically moves down a distance Unlock the separation effect. The buckle linkage device of the connector with simple structure, easy operation, stable buckle and high reliability is provided.

Another object of the present invention is to provide a buckle linkage device for a connector that is easy to operate, securely positioned, not easy to fall off and shake, and has a reliable electrical contact function.

In order to achieve the above purpose, the utility model provides a buckle linkage device of a connector, which is characterized in that it includes:

A connector is provided with a top wall, two side walls, a first end and a second end, the first end and the second end are respectively located on opposite sides of the top wall away from the two side walls, A circuit board and wires are provided, and an assembly part and an installation part adjacent to the second end are provided on the top wall;

A buckle, which has a main body disposed on the assembly part, at least one extension extending from the main body, and at least one elastic part, the extension has a buckle protruding from the top wall, the The buckle part is used to buckle with a mating female seat, the elastic part is formed by protruding from the main body part away from the extension part and is located at the installation part; and

A link assembly, combined with the installation part of the connector, so that the buckle is positioned between the installation part and the link assembly, the link assembly has a first link and a second link A link, the second link is connected to the first link and the connector, the first link is located above the elastic part and has a pressing part, when the second link is pulled The first linking part can be linked to make the pressing part push the elastic part to move, and link the main body part, the extension part and the hook part to elastically deviate a distance.

The buckle linkage device of the connector, wherein: the center of the assembly part is provided with a downwardly penetrating joint groove away from the installation part, the joint groove communicates with the installation part, and one end of the second linkage part is connected to Set in the combination groove.

Said buckle linking device of the connector, wherein: the buckle also has an actuated part, the actuated part protrudes from the main body in a direction away from the extension part, and the elastic part is set symmetrically Two and are formed by turning and protruding from the main body part away from the extension part.

The buckle linkage device of the connector, wherein: the at least one elastic part of the buckle part is provided with a bending part, and the bending part bends an arcuate bending line toward the installation part, The elastic part forms a first segment and a second segment extending from the first segment, and are respectively at different levels from the main body part.

The buckle linkage device of the connector, wherein: the mounting part of the connector has an accommodating groove for the protruding elastic part and the driven part to be accommodated, and the accommodating groove is formed with a horizontally opposite to the On the concave surface of the top wall, guide rails are recessed on opposite sides of the accommodating groove, and the first link is provided with sliders corresponding to the guide rails.

Said buckle linkage device of the connector, wherein: the first section of the elastic part is connected to the main body part and extends downwards, and the first section corresponds to a first pressing position of the pressing part, The second section is connected to the first section and extends along the horizontal direction.

The snap-fit linkage device of the connector, wherein: the fitting part has a slot close to the first end and a fitting groove whose side end communicates with the slot, the extension part extends into the slot, and The buckle part extends away from the main body part and is formed on the extension part and protrudes upward from the top wall.

The snap-fit linkage device of the connector, wherein: the active part is adjacent to the first section, and a second pressing position of the active part relative to the pressing part is provided with a pressed section, and the pressed section The driven part can be pushed by the second pressing position to move.

The buckle linkage device of the connector, wherein: the first linkage is provided with a penetration groove, the penetration groove runs through the opposite top and bottom of the first linkage and communicates with the installation part, when The second connecting piece passes through the first connecting piece and the elastic part, passes through the coupling groove, turns, passes through the insertion groove, turns, enters the receiving groove of the mounting part, and connects to form a connection department.

The buckle linkage device of the connector, wherein: the inner side walls of the two side walls are provided with horizontal rails, and the two sides of the circuit board are oppositely provided with rail protrusions, and the rail protrusions are combined with the horizontal rails to form a positioning , so that one end of the circuit board is located at the first end, the first end can be plugged into the docking socket to form an electrical connection, and the other end of the circuit board is electrically connected to the wire.

With the above-mentioned structure, the main body portion and the extension portion of the buckle are extended to the assembly portion, the buckle is positioned between the installation portion and the first linkage, and the second linkage and The first linkage is connected with the connector, and when the buckle portion of the extension protrudes upwards from the top wall, it can be used to buckle with a mating female seat, or when the second linkage is pulled, it can be The first linking part is linked to move the pressing part forward to push the elastic part to move, so that the buckle part elastically shifts downward by a distance to realize unbuckle. This buckle release scheme can ensure that the pressing part of the first link moves forward and pushes the elastic part downward to move downward, and then the hook part is separated from the docking female seat to present an unbuckled state, which can improve The reliability of buckle and unbuckle is improved, and the electrical connection effect of the buckle is convenient.

Description of drawings

Figure 1 is a schematic diagram of the combination of the buckle linkage device of the connector of the present invention;

Fig. 2 is an exploded view of the buckle linkage device of the connector of the present invention;

3A and 3B are schematic diagrams of different angles of the connector in FIG. 2;

Figure 3C is a schematic diagram of the first linkage in Figure 2;

Fig. 4A, Fig. 4B are respectively A-A, B-B sectional schematic diagrams of Fig. 1;

Fig. 5 is a schematic cross-sectional view of the buckle in Fig. 1 (part of the docking female seat is reserved for the convenience of viewing);

6A and 6B are schematic cross-sectional views of the buckle shown in FIG. 1;

Fig. 7 is a schematic diagram of the buckle linkage device and the docking female seat of the connector of the present invention.

Explanation of reference numerals: 100-the buckle interlocking device of the connector; 1-connector; 10-housing; 11-top wall; 12-side wall; 121-horizontal track; Groove; 13-first end; 14-second end; 141-insertion hole; 15-assembly part; 151-assembly groove; 152-slot; 153-combination groove; 16-installation part; ;162-recessed surface; 163-limiting groove; 164-guide rail; 2-fastener; 21-main body; 22-extension; -first section (with pressure surface); 233-second section; 24-actuated part; 241-pressed section; 3-first linkage; Inclined surface); 312-the second pressing position; 32-the penetration groove; 33-slider; 34-the gap; 4-the second link; 41-the connecting part; 42-the holding part; 51-rail convex part; 6-wire; P-accommodating space; T-butt socket; t1-buckle hole; t2-guide block.

Detailed ways

The above-mentioned purpose of the utility model and its structural and functional characteristics will be described according to the embodiments of the accompanying drawings.

Please refer to Figure 1, which is a schematic diagram of the combination of the buckle linkage device of the utility model connector; Figure 2 is an exploded view of the buckle linkage device of the utility model connector; Figure 3A, Figure 3B, and Figure 3C are diagrams A schematic diagram of the housing and the first linkage; Figure 4A and Figure 4B are respectively A-A and B-B cross-sectional schematic diagrams of Figure 1;

Fig. 5 is a schematic cross-sectional view of the buckle in Fig. 1; Fig. 6A and Fig. 6B are schematic cross-sectional views of an unbuckle in Fig. 1; As shown in the figure, the utility model discloses a buckle linkage device 100 for a connector, which includes a connector 1 , a buckle member 2 , and a linkage assembly. The buckle linkage device 100 of the aforementioned connector can be docked with a docking female seat T of a buckle hole t1 on the top surface (as shown in FIG. 7 ) to form an electrical connection for signal transmission.

The connector 1 includes an insulating shell 10 , a circuit board 5 and wires 6 . The housing 10 has a top wall 11, two side walls 12, a first end 13 and a second end 14; ) and are spaced apart from each other, the first end 13 and the second end 14 are respectively located on the opposite sides of the top wall 11 away from the two side walls 12 (for example, the front and rear sides), and the upper surface of the top wall 11 is set There is an assembly portion 15 and an installation portion 16 , the installation portion 15 is positioned corresponding to and facing the first end 13 , and the installation portion 16 is adjacent to the second end 14 . In this embodiment, the first end 13 is set as a pair of interfaces (as shown in FIG. 3A and FIG. 3B ), which can be inserted and docked with the docking socket T, and the second end 14 is set as a rear shell wall, and Open an insertion hole 141 on the wall, so that the first end 13 (ie, the docking port) and the second end 14 (the rear shell wall with the insertion hole 141) are connected, and then the top wall 1 and the two side walls 12 , the first end 13 and the second end 14 together form a storage space P (as shown in Figure 3A, Figure 4A, and Figure 7), the storage space P accommodates the circuit board 5 and the wire 6 respectively, and is used for docking the After docking with the female seat T, the front end of the docked female seat T can be accommodated in the receiving space P and electrically connected with the circuit board 5 .

Specifically, the aforementioned fitting portion 15 is provided with a fitting groove 151 and two slots 152 vertically connected to the side ends of the fitting groove 151, wherein the fitting groove 151 is parallel to the first end 13, and the free openings of the slots 152 The end is adjacent to the first end 13 , and the fitting groove 151 is correspondingly close to the aforementioned installation portion 16 . A connecting groove 153 penetrating downward is provided at the center of the aforementioned mounting portion 15 away from the mounting portion 16 , and the bonding groove 153 is adjacent to and communicates with the mounting groove 151 .

Specifically, the aforementioned mounting portion 16 has an accommodating groove 161 concaved downward from the top wall 11 and a concave surface 162, the concave surface 162 is formed at the bottom of the accommodating groove 161 and is horizontal to the top wall 11 Set oppositely, and one end of the accommodation groove 161 intersects and communicates with the fitting groove 151 of the fitting part 15 , and communicates with the bottom of the combining groove 153 , while the other end of the accommodation groove 161 communicates with the second end 14 .

Further, two limiting grooves 163 are respectively provided on opposite sides of the concave surface 162 of the aforementioned mounting portion 16 away from the fitting groove 151 , and the two limiting grooves 163 are deeper than the concave surface 162 . The opposite sides of the accommodating groove 161 are recessed with horizontal guide rails 164 , and the horizontal guide rails 164 are respectively adjacent to the limiting grooves 163 (as shown in FIG. 3A ).

Specifically, as shown in Fig. 3A, Fig. 3B, and Fig. 4A, a horizontal track 121 is provided on the inner side walls of the aforementioned two side walls 12, and the horizontal track 121 is adjacent to the first end 13 (that is, the docking port), and on both sides A guide wall 122 is arranged between each inner wall surface of the wall 12, and the guide wall 122 divides the receiving space P into two spaces, and a horizontal guide groove 123 is provided on the guide wall 122, by which The groove 123 connects the aforementioned two spaces. A plurality of contacts (not shown) are provided on the front and rear ends of the aforementioned circuit board 5, and the lengths of the left and right sides of the circuit board 5 are at least smaller than the horizontal length of the guide groove 123, and the left and right sides of the circuit board 5 are at least equal in length. A track protrusion 51 is provided on the outside. When the front end of the circuit board 5 passes through the guide grooves 123, the track protrusions 51 are limited and combined to the side walls adjacent to the guide grooves 123 to form a position, so that the circuit The front contact of the board 5 is located in the receiving space P at the first end 13, and the rear contact of the circuit board 5 can be welded and positioned with the wire 6 inserted through the insertion hole 141 of the second end 14 to form an electrical connection, thereby forming a connector (as shown in Figure 4A and Figure 4B), in addition, the first end 13 (ie, the docking port) can be used for pair insertion on one end of the docking female seat T (as shown in Figure 7) to form the circuit board 5 and The docking socket T is electrically connected.

The buckle 2 has a main body 21, at least one extension 22 protruding from the side end of the main body 21, two elastic parts 23 and a driven part 24, the elastic parts 23 and the The driven part 24 is respectively formed by the main body part 21 turning and protruding downward in the direction away from the extension part 22. The hooking part 221 is provided, and the hooking part 221 is used for buckling with the buckling hole t1 of the docking socket T.

Specifically, the above-mentioned buckle 2 is set in the fitting groove 151 and the slot 152 of the fitting part 15 with the main body part 21 and the extension part 22, and the aforementioned elastic part 23 and the driven part 24 are the containers for accommodating the fitting part 16. Placed in the groove 161, wherein the elastic portion 23 extends downward for a proper length and is provided with a bending portion 231, the bending portion 231 bends an arcuate bending line toward the concave surface 162, so that the elastic The part 23 is formed with a first section 232 and a second section 233 by the bending part 231. The first section 232 is connected to the main body 21 and extends downwards along an oblique direction to connect with the second section 233. The second section 232 The segment 233 extends parallel to the direction of the main body 21, so that the second segment 233 and the first segment 232 form an oblique angle to each other and are located at different horizontal heights from the main body 21, and the second segment 233 is limited to the In the limiting groove 163 of the recessed surface 162, the elastic portion 23 of the buckle 2 is formed by the extended structural relationship between the first segment 232 and the second segment 233, when the first segments 232 are pressed down, there is a produce a downward elastic force. The aforementioned driven part 24 is connected to the main body part 21 and is located between the elastic parts 23 and adjacent to the first segments 232. A compressed segment 241 is protruded from the driven part 24 (as shown in FIGS. 4A and 4B ). As shown), the pressure receiving section 241 can be pressed down to make the driven part 24 move downward. Therefore, when the elastic part 23 and the driven part 24 move downward, the main body part 21 , the extension part 22 and the hook part 221 are elastically shifted downward by a certain distance.

The linkage assembly is combined above the installation portion 16 of the casing 10 so that the buckle 2 is positioned between the installation portion 16 and the linkage assembly. The linkage assembly includes a first linkage 3 and a second linkage 4, as shown in Figure 2 and Figure 3C, wherein the first linkage 3 is located on the elastic portion 23 of the buckle 2 And above the driven part 24, the first link 3 has a pressing part 31, a penetration groove 32, two sliders 33 and a gap part 34, and the pressing part 31 has two The first pressing position 311 at the lower edge of the front side of the piece 3 is designed to be inclined and set as a pressing slope, the second pressing position 312 is recessed between the first pressing positions 311, and the insertion groove 32 is adjacent to The pressing portion 31 runs through the opposite top and bottom of the first linkage 3 , and the two sliders 33 protrude outward from opposite sides of the first linkage 3 away from the pressing portion 31 , and It is only located at the rear side below the side of the first linkage 3, and the most important thing is that the upper and lower thickness of the slider 33 is smaller than the vertical height of the horizontal guide rails 164 on both sides of the accommodation groove 161, and the first linkage The bottom of 3 is designed to be inclined from the rear side to the front side (as shown in Figure 4A), so that a downward pressing space is formed on the front side of the bottom relative to the rear side, and the cavity 34 is formed inwardly at the first linkage. at the center of the bottom of piece 3. The second link 4 can be a pull belt, which has a connecting portion 41 and a gripping portion 42 corresponding to and connected to the link 41, and the link 41 is used to link the first link 3 The insertion groove 32 of the housing 10 and the receiving groove 161 are connected to the holding portion 42 .

In actual implementation, by virtue of the above-mentioned structure, refer to FIG. 4A, FIG. 4B and FIG. In the groove 151 and the slot 152 , the hooking portion 221 protrudes upwards from the slot 152 and is higher than the top wall 11 , and the elastic portion 23 and the driven portion 24 are accommodated in the accommodating groove of the mounting portion 16 161, the second section 233 is against the limiting groove 163 on the concave surface 162, so that the elastic part 23 has a downward elastic force, and makes the hook part 221 of the buckle 2 protrude upward. out (that is, above) above the top wall 11 of the casing 10 . The first linkage 3 slides into the horizontal guide rails 164 on both sides of the receiving groove 161 through the two sliders 33 to be disposed in the receiving groove 161 of the mounting portion 16 of the housing 10 , And located above the elastic portion 23 and the driven portion 24, so that the first pressing position (ie, the pressing slope) 311 of the pressing portion 31 corresponds to and is located above the first segment 232 of the elastic portion 23, so that the first segment 232 forms There is a pressure receiving surface (not marked with a figure number), the second pressing position 312 is located above the driven part 24 and corresponds to the pressure receiving section 241, the penetration groove 32 communicates with the accommodation groove 161, and the first connecting The bottom of the moving part 3 corresponds to the second sections 233 limited in the limiting groove 163, and the gap 34 corresponds to the two second sections 232 of the two elastic parts 23 of the buckle 2 Between, so that the top surface of the first linkage 3 protrudes outside the mounting portion 16 . The second connecting piece 4 passes through between the gap 34 of the first connecting piece 3 and the two elastic parts 23 from the outside, then passes through the coupling groove 153 of the housing 10 from the bottom, and goes out from the top and turns around it. After the main body 21 of the buckle 2 passes through the insertion groove 32 of the first connecting member 3 , it turns and passes through the coupling groove 153 of the housing 10 and passes through from below to enter the receiving recess of the mounting portion 16 . The connecting portion 41 is formed in the groove 161, and is connected with the gripping portion 42, so that the gripping portion 42 of the second connector 4 is close to the concave surface 162 and properly extends towards the direction of the wire 6 (as shown in FIG. 5 ).

Therefore, by virtue of the structural design of the buckle linkage device of the connector of the present invention, refer to Fig. 1, Fig. 2, Fig. 5, Fig. 6A, Fig. 6B, and Fig. The penetration groove 32 of the first link 3 is connected to the coupling groove 153 of the housing 10 of the connector 1, and the first link 3 is combined with the mounting portion 16 of the connector 1, so that the buckle 2 The second segment 233 is positioned between the installation portion 16 and the linkage assembly through the combination relationship between the second segment 233 and the limiting groove 163 . When the connector 1 uses the first end 13 (that is, the docking port) of the housing 10 for the front end of the docking female seat T to be inserted and docked, the docking female seat T can correspond to the guide block t2 on the outer wall and slide into the two sides The horizontal track 121 of the wall 12 makes the front end of the docking socket T accurately accommodated in the receiving space P and electrically connected with the circuit board 5, and the upward protruding hook portion 221 of the free end of the extension portion 22 is Accurately buckle elastically in the fastening hole t1 on the top surface of the docking socket T to achieve the purpose of buckling. When the second link 4 is pulled toward the wires 6 by the grip portion 42 (close to the concave surface 162), the first link 3 can be linked by the connecting portion 41. The top surface of the part 3 protrudes from the top wall 11 of the housing 10 (at a high position) and the grip portion 42 is close to the concave surface 162 (at a low position), so that the connecting portion 41 pulls the first When the front side of the linkage 3 moves forward, the pressing portion 31 pushes down the first segment 232 (the pressed portion of the elastic portion 23 ) with the first pressing position (that is, the pressing slope) 311 and the second pressing position 312 respectively. surface) and the pressure section 241 of the driven part 24 moves downward (the movement is relative to the pressing space), so the main body part 21, the extension part 22 and the buckle part 221 are linked in the assembly groove 151 and The inside of the slot 152 is elastically shifted downward by a certain distance to realize the purpose of unlocking. That is, this buckling release scheme can ensure that the pressing part 31 of the first linking part 3 accurately pushes down the driven part 24 to drive the elastic part 23 to move downwards, and then links the extension part 22 The hooking portion 221 of the hook elastically shifts downward by a certain distance and accurately disengages from the docking socket T to realize the unlocking state. Therefore, the reliability of buckle and unbuckle can be improved, and the electrical connection effect of the buckle is convenient, and a buckle linkage device of the connector is provided that is easy to operate, firmly positioned, not easy to fall off and shake, and has a reliable electrical contact function. .

The utility model has been described in detail above, and the above description is only a preferred embodiment of the utility model, which cannot limit the implementation scope of the utility model. That is, all equivalent changes and modifications made according to the claims of the utility model should still fall within the scope of the patent of the utility model.

Claims (10)

1. A buckle interlock of connector, comprising:

the connector is provided with a top wall, two side walls, a first end and a second end, the first end and the second end are respectively positioned at two opposite sides of the top wall far away from the two side walls and respectively contain a circuit board and wires, and the top wall is provided with an assembling part and an installing part close to the second end;

the buckling piece is provided with a main body part arranged on the assembling part, at least one extending part extending from the main body part and at least one elastic part, the extending part is provided with a buckling part protruding out of the top wall, the buckling part is used for buckling with a butt joint female seat, and the elastic part is formed by the main body part in a protruding mode towards the direction far away from the extending part and is positioned on the installing part; and

the linkage assembly is provided with a first linkage piece and a second linkage piece, the second linkage piece is connected with the first linkage piece and the connector, the first linkage piece is positioned above the elastic part and is provided with a pressing part, when the second linkage piece is pulled, the first linkage piece can be linked, the pressing part pushes and presses the elastic part to move, and the main body part, the extending part and the hooking part are linked to elastically deviate by a distance.

2. The snap linkage of a connector as claimed in claim 1, wherein: the center of the assembly part is provided with a downward through combination groove far away from the installation part, the combination groove is communicated with the installation part, and one end of the second linkage piece is connected with the combination groove.

3. The snap linkage of a connector as claimed in claim 1, wherein: the buckle piece is also provided with a driven part, the driven part is convexly extended from the main body part towards the direction far away from the extension part, and the two elastic parts are symmetrically formed and are formed by the main body part which is bent and convexly extended towards the direction far away from the extension part.

4. The snap linkage of a connector as claimed in claim 3, wherein: the elastic part of the fastener is provided with a bending part, and the bending part is bent to form a bending line with an arch angle shape towards the direction of the mounting part, so that the elastic part forms a first section and a second section extending from the first section, and is respectively at different horizontal heights with the main body part.

5. The snap linkage of a connector as claimed in claim 3, wherein: the installation part of the connector is provided with a containing groove for containing the convex elastic part and the driven part, the containing groove is formed with a concave surface horizontally opposite to the top wall, two opposite sides of the containing groove are concavely provided with guide rails, and the first linkage part is provided with a slide block corresponding to the guide rails.

6. The snap linkage of a connector as claimed in claim 4, wherein: the first section of the elastic part is connected with the main body part and extends downwards, the first section corresponds to a first pressing position of the pressing part, and the second section is connected with the first section and extends along the horizontal direction.

7. The snap linkage of a connector as claimed in claim 1, wherein: the assembling part is provided with a slot close to the first end and an assembling groove with a side end communicated with the slot, the extending part extends into the slot, and the hooking part extends from the direction far away from the main body part to be formed on the extending part and protrudes upwards from the top wall.

8. The snap linkage of a connector as claimed in claim 4, wherein: the driven part is adjacent to the first section, a pressed section is arranged at a second pressing position of the driven part relative to the pressing part, and the pressed section can be pushed by the second pressing position to enable the driven part to move.

9. The snap linkage of a connector as claimed in claim 5, wherein: the assembling part is provided with a combination groove which penetrates downwards, the first linkage part is provided with a penetrating groove, the penetrating groove penetrates through the relative top and bottom of the first linkage part and is communicated with the mounting part, and when the second linkage part penetrates through the first linkage part and the elastic part, penetrates through the combination groove and then turns back and penetrates through the penetrating groove and then turns back, and enters the accommodating groove of the mounting part to be connected to form a connecting part.

10. The snap linkage of a connector as claimed in claim 1, wherein: the inner side wall surfaces of the two side walls are provided with horizontal rails, two sides of the circuit board are oppositely provided with rail convex parts, the rail convex parts are combined with the horizontal rails to form positioning, one end of the circuit board is located at the first end, the first end can be used for oppositely inserting the butt joint female seat to form electric connection, and the other end of the circuit board is electrically connected with the wire.

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