CN213184784U

CN213184784U - Power signal connector

Info

Publication number: CN213184784U
Application number: CN202022095290.6U
Authority: CN
Inventors: 洪军标
Original assignee: Ningbo Xichuang Nike Electronic Technology Co ltd
Current assignee: Ningbo Xichuang Nike Electronic Technology Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-05-11
Anticipated expiration: 2030-09-22

Abstract

A power signal connector comprises a male seat and a female seat, wherein the male seat comprises a male seat shell, a male seat power module and a crystal head, a concave cavity for the male seat power module to be placed in is formed in the middle of the male seat shell, jacks for the crystal head to be inserted into are formed in two sides of the male seat shell, and the male seat power module and the crystal head are respectively inserted into the concave cavity and the square jacks from the rear end of the male seat shell and are positioned in a clamping mode; the female seat comprises a female seat shell, a female seat power supply module and a switching assembly, a cavity for placing the female seat power supply module is formed in the middle of the rear end face of the female seat shell, square bumps with square holes are convexly arranged on the left side and the right side of the female seat shell forwards, and the female seat power supply module and the switching assembly are inserted into the cavity and the square holes from the rear end of the female seat shell and are positioned in a clamping mode; the rear ends of the male socket power supply module and the female socket power supply module are connected with the power line in a spring plate wiring mode. The utility model discloses compact rational in infrastructure can realize the quick installation and the dismantlement of each part, user's of being convenient for assembly, maintenance and change.

Description

Power signal connector

Technical Field

The utility model relates to a connector technical field especially relates to a power signal connector.

Background

A connector is an indispensable component in electronic equipment, is a connecting device for connecting a plurality of signal lines or power lines in sequence, is widely used in various electric lines, and plays a role in connecting or disconnecting a circuit. The existing connectors are divided into power line connectors and signal line connectors, different connectors need to be selected for different transmission objects when lines are connected, power lines and signal lines need to be connected to the same equipment in the actual line building process, and the power signal connectors capable of being connected with power supplies and signals simultaneously appear at present for connection convenience.

The existing power signal connector comprises a male seat and a female seat, the male seat and the female seat are respectively connected and then are assembled and used in an inserting way, and the following defects exist in the using process:

firstly, as the crystal head needs to be matched with a carrier for use, and the crystal head is inserted into the shell by the carrier, a specially-made crystal head is needed for matching, the crystal head can not be used as a standard crystal head in the market, and a user needs to purchase the specified specially-made crystal head during installation and maintenance, so that the assembly, maintenance or replacement of the user are not convenient;

secondly, the power supply pin is directly inserted into the shell, and a user needs to operate on the panel of the shell during installation and maintenance, so that the power supply pin is difficult to disassemble and is inconvenient for the user to assemble, maintain or replace;

and thirdly, the power supply pin and the electric wire are pressed together through a pressing tool, and a user needs to press by using a special tool during installation and maintenance, so that the assembly, maintenance or replacement of the user is inconvenient.

Chinese patent CN201710333467.1, entitled "device for assembling, disassembling and removing a plug connector", has at least one latching flank which is provided for latching the device to the plug connector. The first wedge surface provided on the component is provided for disengaging the plug connector from the wall bushing or other plug connector receptacle. By means of the first movement, the component can thus be latched on the plug connector, wherein at the same time the latching of the plug connector with the plug connector receiving part is released. The plug connector can therefore be released and removed particularly advantageously by two small movements, facilitating the assembly of the plug connector, and can be used for fixing the crystal head, but the structure is not simple enough to solve the problem of assembly of the power signal connector.

Disclosure of Invention

The utility model aims to solve the technical problem that a power signal connector with reasonable and compact structure and convenient assembly and maintenance is provided for the aforesaid technical current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a power signal connector, includes public seat and female seat, its characterized in that: the male seat comprises a male seat shell, a male seat power supply module and a crystal head, a concave cavity for the male seat power supply module to be placed in is formed in the middle of the rear end face of the male seat shell, square jacks for the crystal head to be inserted in are formed in the left side and the right side of the male seat shell, and the male seat power supply module and the crystal head are inserted into the concave cavity and the square jacks from the rear end of the male seat shell and are positioned in a clamping mode; the rear end of the male power supply module is connected with a power line in a spring plate wiring mode;

female seat includes female seat shell, female seat power module and switching subassembly, the rear end face middle part shaping of female seat shell has the cavity that supplies female seat power module to put into, the left and right sides of female seat shell is equipped with the square convex block that has the quad slit forward protrudingly, female seat power module, with the supporting switching subassembly of quartzy head plant the mode location through the joint in cavity and quad slit from the rear end of female seat shell, female seat power module's rear end adopts the mode of shell fragment wiring to be connected with the power cord.

As an improvement, the male housing is a housing with a waist-shaped front end, the female housing is a corresponding waist-shaped housing, the middle parts of the upper end surfaces of the male power module and the female power module are respectively and convexly provided with an elastic force arm inclining upwards and backwards, the middle part of the upper end surface of the elastic force arm is convexly provided with a buckle, the cavity of the male housing and the cavity of the female housing are respectively provided with a cavity with a rectangular cross section matched with the male power module and the female power module, the middle part of the upper end of the cavity with the rectangular cross section is concavely provided with a lock hole matched with the elastic force arm, the male power module and the female power module are respectively inserted into the rectangular cavity and are clamped and positioned through the buckle and the lock hole, the rear end of the elastic force arm is provided with a pressing part capable of pressing downwards to facilitate unlocking, and the pressing part is positioned.

The improvement is that the upper end of the inner wall of the square jack of the male socket shell is integrally formed with an elastic clamping hook which is inclined downwards and backwards at the same time, the rear end of the crystal head is provided with an upward convex step, the crystal head is inserted into the square jack and is limited by the matching of the step and the elastic clamping hook, and the rear end of the elastic clamping hook extends out of the square jack; the switching subassembly of female seat is RJ45 switching subassembly, and the up end of switching subassembly is equipped with the trip shell fragment that upwards inclines simultaneously along length direction, and the inner wall upper end of the quad slit of female seat shell is equipped with corresponding fixture block, and the switching subassembly inserts the cooperation joint location through trip shell fragment and fixture block in the quad slit, and the rear end that the switching subassembly inserted the back trip shell fragment is located outside the quad slit.

Further, the male power module is assembled by a male power body, a male pin, a male power cover plate, a male wire clamping spring and a male button, wherein the rear end of the male pin is mounted on the male wire clamping spring and arranged in the male power body;

female seat power module is formed by female seat power body, female end contact pin, female end power apron, female end clip line shell fragment and the equipment of female end button, and the rear end of female end contact pin is installed and is set up on female end clip line shell fragment at female end power originally internally, and female end button and the cooperation of female end clip line shell fragment, female end power apron are to closing the lid and establishing the front end at female seat power body, and the shaping has the drum structure that the front end that supplies female end contact pin wore to put on the female end power apron.

Still further, a plurality of circular ports coaxial with the public end contact pin and capable of supplying the cylinder structure of female end power source apron are seted up corresponding to the position with the cavity in the middle part of the preceding terminal surface of public seat shell, and the protruding direction muscle that is equipped with in one side of cylinder structure, one side of circular port is equipped with the guide way with direction muscle complex, the through-hole that the cylinder structure that supplies female end power source apron stretches out is seted up corresponding to the position in holding chamber in the middle part of the preceding terminal surface of female seat shell, the male round hole that supplies public end contact pin male is seted up to the front end of cylinder structure, the square convex block of female seat shell cooperatees with the square jack of public seat shell, public seat and female seat are through square jack and square convex block, the circular port is pegged graft.

Furthermore, the square bump on the front end surface of the female seat is basically flush with the cylindrical structure of the female-end power supply cover plate.

Furthermore, the rear ends of the male power supply body and the female power supply body are respectively formed with jacks for inserting power lines, and the power lines are connected in a voltage-free and rapid mode through the male end wire clamping elastic sheet or the female end wire clamping elastic sheet after being inserted.

Further, public seat power module's public end contact pin is 5, and public end trapping mechanism shell fragment, public end button are 5, and is corresponding, and female seat power module's female end contact pin is 5, and female end trapping mechanism shell fragment, female end button are 5.

Furthermore, the female seat shell is formed by assembling a female seat shell and an outer shell in a waist-round shape, connecting holes are formed in the edges of the two ends of the female seat shell, corresponding connecting lugs are arranged on the two sides of the outer shell, and the female seat shell and the outer shell are fixedly riveted in a long-thread piece and flat-thread piece riveting mode.

Finally, the front section of the female end contact pin is hollow, the rear section of the female end contact pin is flat and long, the female end wire clamping elastic sheet main body is provided with a frame body, the bottom or the top of the frame body is provided with a longitudinal and transverse hole groove, so that the frame body has good elasticity, then the rear section of the female end contact pin is embedded and fixed, the rear side of the frame body is provided with an arc elastic sheet for pressing wires, an embedding hole is formed in the elastic sheet, the front end of a female end button is embedded and fixed, and the rear end of the female end button is provided with a groove for pressing a;

correspondingly, public end contact pin anterior segment is the cavity shape, and the back end is rectangular form platykurtic, and public end wire clamping shell fragment main part has the framework, and the vertical and horizontal trompil groove in framework bottom or top makes it have good elasticity, then supplies public end contact pin back end to inlay admittedly, and the framework rear side has the curved flexure strip that is used for the line ball, opens the embedded hole on the flexure strip, and the front end embedding that lets public end button is fixed, and the back end fluting of public end button can supply the instrument to oppress.

Compared with the prior art, the utility model has the advantages of: an elastic clamping hook capable of limiting the crystal head is integrally formed in the square jack into which the male seat shell is inserted corresponding to the crystal head, the crystal head can be quickly plugged without a carrier, and meanwhile, a standard crystal head on the market can be adopted; the power supply is modularized, and the male seat power supply module and the female seat power supply module are clamped and positioned with the lock hole of the shell by adopting an elastic force arm, so that the assembly is very convenient; the power module adopts the wiring of pressing from both sides line shell fragment, need not use tools, exempts from to press the wiring, only need directly with naked copper line insert power module in can, improve wiring efficiency greatly. The utility model discloses compact rational in infrastructure can realize the quick installation and the dismantlement of each part, user's of being convenient for assembly, maintenance and change.

Drawings

Fig. 1 is a schematic structural view of the present invention in a state where the male seat and the female seat are inserted;

FIG. 2 is a schematic structural view of the present invention in an unplugged state;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a cross-sectional view of FIG. 2;

FIG. 5 is an exploded view of FIG. 2;

FIG. 6 is an exploded view of the female power module;

fig. 7 is a cross-sectional view of the female power module.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 7, a power signal connector includes a male socket 10 and a female socket 20, the male socket 10 includes a male socket housing 1, a male socket power module 2 and two crystal heads 3, namely RJ-45 connectors, a cavity for the male socket power module 2 to be inserted is formed in the middle of the rear end surface of the male socket housing 1, square jacks for the crystal heads 3 to be inserted are formed in the left and right sides of the male socket housing 1, the male socket power module 2 and the crystal heads 3 are respectively inserted into the cavity and the square jacks from the rear end of the male socket housing 1 and are positioned by clamping, the rear end of the crystal heads 3 is connected with a signal line 40, and the rear end of the male socket power module 2 is connected with a power line 30 by using a spring plate wiring method.

Female seat 20 includes female seat shell 4, female seat power module 5 and switching subassembly 6, the rear end face middle part shaping of female seat shell 4 has the cavity that supplies female seat power module 5 to put into, the left and right sides of female seat shell 4 is equipped with the square projection 43 that has the quad slit forward protruding, female seat power module 5, switching subassembly 6 supporting with quartzy head 3 is planted in cavity and quad slit through the mode location of joint from the rear end of female seat shell 4, switching subassembly 6's rear end is pegged graft mutually with another quartzy head 7 that has signal line 40, female seat power module 5's rear end adopts the mode of shell fragment wiring to be connected with power cord 30.

The concrete structure is as follows: the male seat shell 1 is a shell with a waist-shaped front end, the female seat shell 4 is a corresponding waist-shaped, the male seat power module 2 and the female seat power module 5 are both in a substantial cube shape, the middle parts of the upper end faces of the male seat power module 2 and the female seat power module 5 are respectively convexly provided with an elastic force arm 2a and an elastic force arm 5a which are inclined upwards and backwards, the middle parts of the upper end faces of the

elastic force arms

2a and 5a are respectively convexly provided with a buckle 2b and a buckle 5b, the cavity of the male seat shell 1 and the cavity of the female seat shell 4 are respectively a chamber with a substantially rectangular cross section matched with the male seat power module 2 and the female seat power module 5, the middle part of the upper end of the chamber with the rectangular cross section is concavely provided with a lock hole matched with the

elastic force arms

2a and 5a, the male seat power module 2 and the female seat power module 5 are respectively inserted into the chamber with the rectangular cross section and are clamped and positioned, the rear ends of the

elastic force arms

2a and 5a are respectively provided with pressing parts 2c and 5c which can be pressed downwards to facilitate unlocking, and the pressing parts 2c and 5c are located outside the rectangular cavity, so that the male power module 2 and the female power module 5 can be quickly plugged and pulled only by pressing the pressing parts 2c and 5c downwards, and the assembly is very quick and convenient.

The inner wall upper end integrated into one piece of the square jack of public seat shell 1 has a downward elasticity trip 13 that inclines backward simultaneously, and the rear end of quartzy head 3 is equipped with the bellied step 31 that makes progress, and it is spacing through step 31 and the cooperation of elasticity trip 13 that quartzy head 3 inserts in the square jack, and outside the square jack was stretched out to the rear end of elasticity trip 13, as long as upwards pull the rear end of elasticity trip 13 like this, just can extract quartzy head 3 from public seat 10 fast. Female seat 20's switching subassembly 6 is RJ45 switching subassembly, switching subassembly 6's up end is equipped with earlier on the trip shell fragment 61 that inclines backward simultaneously along length direction, female seat shell 4's the inner wall upper end of quad slit is equipped with corresponding fixture block, switching subassembly 6 inserts the cooperation joint location through trip shell fragment 61 and fixture block in the quad slit, switching subassembly 6 inserts the rear end of back trip shell fragment 61 and is located outside the quad slit, as long as down press the rear end of trip shell fragment 61 like this, just can extract switching subassembly 6 from female seat 20 fast, the assembly is swiftly convenient.

The female power module 5 is assembled by a female power body 51, a female pin 52, a female power cover 56, a female wire clip 53 and a female button 54, wherein the front section of the female pin 52 is hollow and the rear section is flat and strip, the female wire clip 53 has a hollow frame, the bottom or top of the frame has a longitudinal and transverse opening slot 53a to make it have good elasticity, then the rear section of the female pin 52 is embedded and fixed, the rear side of the frame has an arc elastic sheet 53b for pressing wires, the elastic sheet 53b is provided with an embedding hole 53c to make the front end of the female button 54 embedded and fixed, the rear end of the female button 54 is provided with a slot for pressing by a tool, thus, the rear end of the female pin 52 is installed on the female wire clip 53 and arranged in the female power body 51, the female button 54 is matched with the female wire clip 53, the female power cover 56 is closed and covered on the front end of the female power body 51, and the female power supply cover plate 56 is fixedly connected through clamping, and a cylindrical structure 55 for the front end of the female pin 52 to penetrate is formed on the female power supply cover plate.

Public seat power module 2 is by public seat power body 21, public end contact pin 22, public end power apron 25, public end clip line shell fragment 23 and public end button 24 etc. equipment form, wherein concrete structure refers to foretell female seat power module 5 structure, it is similar the same, the rear end of public end contact pin 22 is installed and is set up on public end clip line shell fragment 23 in public seat power body 21 like this, public end button 24 and the cooperation of public end clip line shell fragment 23, public end power apron 25 is to closing the lid and establishing the front end at public seat power body 21, offer the through-hole that supplies public end contact pin 22 to stretch out on the public end power apron 25.

A plurality of circular holes 12 coaxial with the male end contact pin 22 are arranged in the middle of the front end face of the male base shell 1 corresponding to the position of the concave cavity, and the circular cylinder structure 55 of the female end power cover plate can be inserted into the circular holes 12, a guide rib is convexly arranged on one side of the circular cylinder structure 55, one side of the circular hole 12 is provided with a guide groove matched with the guide rib, through holes extending out of the circular cylinder structure 55 of the female end power cover plate are arranged in the middle of the front end face of the female base shell 5 corresponding to the position of the accommodating cavity, a circular hole for inserting the male end contact pin 22 is arranged at the front end of the circular cylinder structure 55, the square convex block 43 of the female base shell 4 is matched with the square convex hole of the male base shell 1, the male base 10 and the female base 20 are connected with the square convex block 43 through the square convex hole, the circular hole 12 is connected with the circular cylinder structure 55 in an.

The rear ends of the male power supply body 21 and the female power supply body 51 are respectively formed with jacks for inserting the power supply line 30, tools are not needed after the power supply line 30 is inserted, only bare copper wires are directly inserted into the male power supply body 21 and the female power supply body 51, and the pressing-free quick wiring can be realized through the male wire clamping elastic sheet 23 or the female wire clamping elastic sheet 53.

The female seat shell 4 is formed by assembling a female seat shell and an outer shell in a waist-round shape, connecting holes 41 are formed in the edges of two ends of the female seat shell, corresponding connecting lugs are arranged on two sides of the outer shell, and the female seat shell and the outer shell are fixedly riveted in a long-thread piece and flat-thread piece riveting mode.

The male end pin 22 of the male socket power module 2 of this embodiment is 5, and the male end wire clamping elastic sheet 23 and the male end button 24 are 5, and correspondingly, the female end pin 52 of the female socket power module 5 is 5, and the female end wire clamping elastic sheet 53 and the female end button 54 are 5.

The number of male pins 22 and female pins 52 can be increased or decreased as desired, and the shape of the female housing 20 of the male housing 10 and the shape of each receptacle can be changed.

The specific installation process is as follows:

firstly, installing a male seat 10:

1. the rear end of the male end pin 22 is arranged in the male end wire clamping elastic sheet 23;

2. the assembled components are arranged in a male power body 21;

3. assembling a male power supply cover plate 25 in a matching way, and finally assembling a male button 24 to complete the assembly of the male power supply module 2;

4. the male seat power supply module 2 is arranged in the middle concave cavity of the male seat shell 1 to be clamped and positioned;

5. two crystal heads 3 are inserted into square insertion holes at the left side and the right side of the male housing 1 to be clamped and positioned.

Secondly, the female seat 20 is installed:

1. the rear end of the female-end pin 52 is arranged in the female-end wire clamping elastic sheet 53;

2. the above assembled components are put into the female power supply body 51;

3. assembling a female power supply cover plate in a matching way, and finally installing a female button 54 to finish the assembly of the female power supply module 5;

4. the long screw sheet is arranged in the connecting hole 41 of the female socket shell 4, and then the flat screw sheet is riveted with the long screw sheet to complete the assembly of the female socket shell 4;

5. the female power supply module 5 is arranged in the middle cavity of the female shell 4 and is clamped and positioned;

6. the switching assembly 6 is inserted into square holes at the left side and the right side of the female seat shell 4 to be clamped and positioned.

When the socket is used, the power supply and the signal can be simultaneously connected only by inserting the female socket 20 into the male socket 10 in an aligning way.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a power signal connector, includes public seat and female seat, its characterized in that: the male seat comprises a male seat shell, a male seat power supply module and a crystal head, a concave cavity for the male seat power supply module to be placed in is formed in the middle of the rear end face of the male seat shell, square jacks for the crystal head to be inserted in are formed in the left side and the right side of the male seat shell, and the male seat power supply module and the crystal head are inserted into the concave cavity and the square jacks from the rear end of the male seat shell and are positioned in a clamping mode; the rear end of the male power supply module is connected with a power line in a spring plate wiring mode;

2. The power signal connector of claim 1, wherein: public seat shell is the casing that the front end is the oval form, female seat shell is the waist circular that corresponds, the up end middle part of public seat power module and female seat power module is protruding respectively to be equipped with one upwards simultaneously the elasticity arm of force that inclines backward, the protruding buckle that is equipped with in up end middle part of the elasticity arm of force, the cavity of public seat shell, the cavity of female seat shell respectively be with public seat power module, female seat power module matched with rectangular section's cavity, the concave lockhole that is equipped with the elasticity arm of force complex in upper end middle part of rectangular section's cavity, public seat power module, female seat power module inserts respectively in the rectangular cavity and fixes a position through buckle and lockhole cooperation joint, be equipped with the splenium of being convenient for the unblock of pressing downwards in elasticity arm of force rear end, press the splenium to be located outside rectangular section.

3. The power signal connector of claim 2, wherein: an elastic clamping hook which is inclined downwards and backwards at the same time is integrally formed at the upper end of the inner wall of the square insertion hole of the male seat shell, an upward convex step is arranged at the rear end of the crystal head, the crystal head is inserted into the square insertion hole and is limited by the matching of the step and the elastic clamping hook, and the rear end of the elastic clamping hook extends out of the square insertion hole; the switching subassembly of female seat is RJ45 switching subassembly, and the up end of switching subassembly is equipped with earlier on the trip shell fragment that slopes simultaneously backward along length direction, and the inner wall upper end of the quad slit of female seat shell is equipped with corresponding fixture block, and the switching subassembly inserts the quad slit and fixes a position through the cooperation joint of trip shell fragment and fixture block, and the switching subassembly inserts the rear end of back trip shell fragment and is located outside the quad slit.

4. The power signal connector of claim 3, wherein: the male power module is formed by assembling a male power body, a male pin, a male power cover plate, a male wire clamping elastic sheet and a male button, wherein the rear end of the male pin is arranged on the male wire clamping elastic sheet and arranged in the male power body;

5. The power signal connector of claim 4, wherein: the public preceding terminal surface middle part of seat shell is corresponding to the position with the cavity and has been seted up a plurality ofly coaxial with public end contact pin, and can supply female end power source cover plate's drum structure male circular port, the protruding direction muscle that is equipped with in one side of drum structure, one side of circular port be equipped with direction muscle complex guide way, the through-hole that the drum structure that supplies female end power source cover plate stretches out is seted up corresponding to the position in holding chamber in the preceding terminal surface middle part of female seat shell, the front end of drum structure is seted up and is supplied public end contact pin male round hole, the square convex block of female seat shell cooperatees with the square jack of public seat shell, public seat passes through square jack and square convex block with female seat, the circular port pegs graft mutually with the cooperation.

6. The power signal connector of claim 5, wherein: the square convex block on the front end surface of the female seat is basically flush with the cylindrical structure of the female-end power supply cover plate.

7. A power signal connector according to any one of claims 4 to 6, wherein: the rear ends of the male power supply body and the female power supply body are respectively formed with jacks for inserting power lines, and the power lines are connected in a voltage-free and rapid mode through the male end wire clamping elastic sheet or the female end wire clamping elastic sheet after being inserted.

8. A power signal connector according to any one of claims 4 to 6, wherein: public seat power module's public end contact pin is 5, and public end trapping mechanism shell fragment, public end button are 5, and is corresponding, and female seat power module's female end contact pin is 5, and female end trapping mechanism shell fragment, female end button are 5.

9. A power signal connector according to any one of claims 1 to 6, wherein: the female seat shell is formed by assembling a female seat shell and an outer shell in a waist-round shape, connecting holes are formed in the edges of two ends of the female seat shell, corresponding connecting lugs are arranged on two sides of the outer shell, and the female seat shell and the outer shell are fixedly riveted in a long-screw sheet and flat-screw sheet riveting mode.

10. A power signal connector according to any one of claims 4 to 6, wherein: the front section of the female end contact pin is hollow, the rear section of the female end contact pin is flat and long, the female end wire clamping elastic sheet main body is provided with a frame body, the bottom or the top of the frame body is provided with a longitudinal and transverse hole groove, so that the frame body has good elasticity and is used for embedding and fixing the rear section of the female end contact pin, the rear side of the frame body is provided with an arc elastic sheet for pressing wires, an embedding hole is formed in the elastic sheet, the front end of a female end button is embedded and fixed, and the rear end of the female end button is provided with a groove for;

correspondingly, public end contact pin anterior segment is the cavity shape, and the back end is rectangular form platykurtic, and public end wire clamping shell fragment main part has the framework, and the vertical and horizontal trompil groove in framework bottom or top makes it have good elasticity, then supplies public end contact pin back end to inlay admittedly, and the framework rear side has curved elastic sheet that is used for the line ball, opens the embedded hole on the elastic sheet, lets the front end embedding of public end button fixed, and the back end fluting of public end button supplies the instrument oppression.