CN105206993B - The converter of the scalable storage of plug - Google Patents

Abstract

The invention discloses a kind of converter of the scalable storage of plug, the housing of socket is disposed with including side, provided with ground pole base and slidingtype Plug base in housing, Plug base is provided with LN poles latch, ground pole base is provided with conductive chute, Plug base is provided with earth polar pin hole close to the side of conductive chute, earth polar latch is slideably provided with the pin hole of earth polar, lever position-limit mechanism is provided between Plug base and earth polar latch, Plug base is driven after LN extremely inserts and be retracted into housing, it is spacing and in linkage status by lever position-limit mechanism between Plug base and earth polar latch.The earth polar latch of the present invention can stretch out or retract with Plug base, and conversion is convenient and is easy to carry, with very high practical value.

Description

Converter with retractable plug

technical field

The present invention relates to the technical field of electrical connection components, in particular to a converter with retractable plugs.

Background technique

The socket converter mainly converts one form of socket into another form or multiple forms of sockets. If it is necessary to convert between the socket standards of multiple different countries, it can be called a multi-country converter. For example, convert the European standard socket to the national standard socket conforming to the "GB 1002-2008: Single-phase plug and socket for household and similar purposes" standard, and convert the American standard socket to the national standard socket, so that the multi-country conversion can be performed on the European standard and American standard sockets The device provides power for electrical appliances with national standard plugs, such as mobile phone chargers and notebook power supplies with national standard plugs. Since the multi-country converter is used outside, it is very likely that there is a need to use a multi-country converter in different countries. However, the L and N poles of the socket standards in some countries in the world are the same, and only the requirements for the ground pin are different. Different, for example, the L and N poles in the Italian three-pole plug are the same as the two-pole sockets in Germany and Austria, but the two-pole sockets in Germany and Austria have no ground pole jacks, and the L and N poles of the American standard two-pole grounding plug are the same as those in the United States. Standard and Japanese standard two-pole sockets are compatible, but American standard and Japanese standard two-pole sockets do not have ground jacks, so whether the plugs of multi-country converters use ground pins is a choice that many manufacturers need to face. Most of the multi-country converter plug parts do not have a ground pin, that is, they have no grounding function; however, the jacks of the socket parts generally use a three-pole hole type, that is, with a ground hole, that is, the grounding jack on the socket is not realized. grounded. This form of multi-country converter cannot be sold normally in China, and untrue grounding is a potential safety hazard for some electrical appliances that need to be grounded. In the prior art, the following two methods are mainly used to solve the problem: 1. Use a multi-country converter with replaceable plug parts. For example, if you go to the UK, you will replace the plug part with the British standard plug on the main body of the converter. However, the existing multi-country converter generally has multiple plug parts, which is difficult to store or has a large volume after storage, and poor portability. 2. If you use converter kits from multiple countries, for example, if you go to the United States, you can take out the American converter from the kit. If you go to Italy, take out the Italian converter and use it. In this way, the number of converters is large, and the portability is poor. The publication date is June 24, 2015, and the Chinese patent document with the publication number CN204424645U discloses a plug with a telescopic ground pin, including a plug base and a two-pole pin. The pin mounting seat, the two-pole pins are installed in the pin mounting seat, the ground pin guide sleeve is provided in the plug mounting seat between the two pole pins, the ground pole pin is arranged in the ground pin guide sleeve, the top of the pin mounting seat is connected to the ground The corresponding part of the guide sleeve of the pole pin is provided with an avoidance hole for the expansion and contraction of the pole pin. The bottom of the pin mounting seat is also provided with a support seat. The pin limit mechanism is used to limit the extension and retraction of the two extreme positions of the ground pole pin. But this retractable earth pole plug adopts the limit block that rotates 180 degrees to fix the position of the earth pole. The pole is always protruding, which is not conducive to the miniaturization of the converter. The publication date is October 15, 2014, and the Chinese patent document with the publication number CN203883277U discloses a socket converter, including a housing, a grounding blade placed on the housing, a live wire blade and a neutral wire blade, and a set For the conductive components in the housing, transfer sockets are arranged symmetrically on both sides of the housing, and a housing cavity is provided directly below the corresponding grounding blade in the housing, and a housing cavity is provided to control the grounding blade to protrude or retract into the housing The movable assembly includes a resisting block and a spring arranged in sequence, the grounding plug is fixed on the resisting block, one end of the spring is fixedly connected to the resisting block, and the other end is fixedly connected to the bottom wall of the accommodating cavity, and the housing is close to the grounding plug The side wall on one side of the piece is provided with a chute and a limit groove that communicate with each other, and a shifting block that can slide on the chute is provided on the side of the conflicting block. One end of the shifting block is exposed outside the housing through the chute and can be Place it in the limiting slot through the slide slot. However, this socket converter adopts the accommodation chamber to accommodate the grounding blade, and the position of the grounding blade is fixed by the conflicting block and the spring arranged in the housing chamber. Every time the grounding blade is used, a special ground pole insertion is required. It is very inconvenient to use because the sheet sticks out for operation.

Contents of the invention

The purpose of the present invention is to solve the problem that the ground pole pin cannot extend with the plug after being retracted in the existing plug retractable socket converter in the prior art, and it is inconvenient to use, and provides a ground pole pin that can extend with the plug. Converter that can be retracted and stored with an easy-to-use plug.

The specific technical solution adopted by the present invention to achieve the above object is a converter with retractable plugs, which includes a housing with a socket on one side, an earth pole base and a sliding plug base inside the housing, and the plug The base is provided with LN pole pins, the ground pole base is provided with conductive chute, the side of the plug base close to the conductive chute is provided with ground pole pin holes, and the ground pole pin holes are slidably provided with ground pole pins , There is a lever-type limit mechanism between the plug base and the ground pole pin. is linked. The LN pole pin refers to the L pole pin connected to the live wire and the N pole pin connected to the zero line. The sliding plug base used to fix the L pole pin and the N pole pin in the present invention can slide along the guide rail in the housing to make the plug protrude The housing or the retractable housing; and the ground pole pin is slidably arranged on the guide rail and a lever type limit mechanism is provided between the ground pole pin and the plug base. When the plug base drives the plug to retract into the shell, The lever-type limit mechanism between the ground pin and the plug base acts as a limit, so that the ground pin and the plug base are in a linked state, that is, the ground pin can extend out of the housing with the plug base. In this way, the present invention solves the problem of inconvenient use that cannot be extended with the plug after the ground pole pin is retracted in the plug retractable socket converter in the prior art.

Preferably, the ground pole bolt includes a bolt body, and the lever-type limiting mechanism includes a lever groove longitudinally arranged at the front of the bolt body. A lever is arranged in the lever groove, and the middle part of the lever is hinged with the lever groove through a pin shaft. The end tilts to the side away from the lever groove to form a limiting part, and after the plug base drives the plug to retract into the housing, the limiting part of the lever abuts against the plug base. A lever is arranged on the main body of the earth pole bolt. When the earth pole bolt is not in use, only the front end formed by the lever needs to be pulled toward the opening side of the lever groove. At this time, the lever in the lever groove rotates and the rear end of the lever (limit part) and the plug base, at this time, press the ground pole pin inwardly, and the ground pole pin can retreat in the ground pole pin hole, so that only the L pole pin and the N pole pin are left to form a two-pole plug, which can meet the two-pole The plug-in requirements of the jack make the plug universal for three-pole and two-pole.

Preferably, the front end of the lever slot extends to the front end of the plug body, and the front end of the lever extends out of the lever slot to form an insertion portion of the ground pole plug. The front end of the lever is extended out of the lever groove to form the insertion part of the ground pole bolt. First, it can facilitate the pulling of the lever. Second, it can prevent the lever groove at the front end of the main body of the bolt from affecting the insertion function of the ground pole bolt.

As a preference, the rear part of the plug body is a hollow structure, the rear end of the lever groove communicates with the hollow structure, the rear end of the ground pole plug is provided with a slot, the slot is provided with a conductive shrapnel slidingly connected to the conductive chute, and the conductive shrapnel One end is electrically connected with the bolt main body, and the other end is electrically connected with the conductive chute. The conductive shrapnel connects the main body of the pin and the conductive chute, so that the grounding pin is always electrically connected.

Preferably, the conductive shrapnel is T-shaped, the vertical end of the T-shaped conductive shrapnel extends into the lever groove and abuts against the rear of the lever near the bottom of the lever groove, and the other two ends of the T-shaped conductive shrapnel extend out of the ground pole The two sides of the pin are in contact with the notch of the conductive runner. The vertical end of the T-shaped conductive shrapnel provides lateral elastic force for the rear end of the lever, so that the rear end of the lever tilts to the side away from the lever groove. Although the lever itself has a certain reset elastic force, the external elastic force can make it more reliable. Work; the other two ends of the T-shaped conductive shrapnel protrude from both sides of the ground pole pin and are slidably connected to the notch of the conductive chute, so that the ground pin is always electrically connected to the conductive chute.

Preferably, a limit step is provided at the rear of the plug body, and a bushing is provided on the outer peripheral surface of the ground plug near the insertion portion. The limit step plays a role in limiting the ground pin, which can prevent the ground pin from sliding out; setting the bushing can make the shape of the ground pin meet the relevant standards, and ensure the electrical conductivity of the connector. When setting the bushing, the sleeve The main body of the pin at the pipe is slightly smaller, so that the surface of the ground pin after the sleeve is added is smooth.

Preferably, the cross-section of the conductive chute is semicircular or rectangular, and the ground pins are respectively corresponding to a cylindrical structure or a square column structure. The semicircular conductive chute is suitable for cylindrical ground pins, and the rectangular conductive chute is suitable for square column ground pins.

Preferably, the side of the plug base provided with the ground pin hole is slidably fitted in the conductive sliding slot, and the ground pin hole is close to the opening of the conductive sliding slot. Setting the ground pin hole near the opening of the conductive chute can facilitate the electrical connection between the pole pin and the conductive chute; at the same time, one side edge of the plug base is slidably connected with the conductive chute, which can make the plug The slide of the base is smoother.

Preferably, the plug base includes a toggle block, the toggle block is arranged on the outer wall of the housing, and the housing is provided with a slide groove corresponding to the toggle block. The toggle block arranged on the outer wall of the casing can conveniently toggle the plug base, which is convenient for use.

Preferably, the housing is also provided with a control board that slides and engages with the ground base, one side of the control board is provided with buttons, the housing is provided with button holes corresponding to the buttons, and the middle part of the control board is provided with a conductive chute to avoid There is a plug base positioning rod on the control panel, and a return spring is provided on the control panel and the ground base. One end of the return spring is in contact with the control panel, and the other end of the return spring is in contact with the ground base. The control panel is also provided with an anti-off buckle. The function of the control board is to restrict the protruding plug from receding. When the socket converter uses the plug base to make the plug protrude from the housing, the positioning rod of the plug base on the control board will abut against the plug base to prevent the plug base from receding. , When the socket converter is used and stored, press the button to separate the positioning rod from the plug base, and the plug can be retracted into the housing by moving the plug base.

Preferably, there are two return springs, which are arranged on two diagonal corners of the control board. The control board is extended with a return spring top plate, and the corresponding ground base is provided with a receiving groove. The return spring top plate and the return spring Placed in the corresponding accommodating tank; the side of the ground base facing the lower cavity is protruded with three clips, and the control board is provided with corresponding cards, and the control board and the ground base are slidingly connected by the cards and the clamps.

Preferably, a guide hole is further provided on the plug base, a connecting post corresponding to the guide hole is provided between the ground base and the housing, and the plug base is sleeved on the connecting post through the guide hole. The invention utilizes the connecting column fixed to the ground pole base as the guide column for the movement of the plug base, which can ensure the smooth movement of the plug base and simplify the internal structure of the socket converter.

Preferably, the L pole pin and the N pole pin side of the plug base are provided with conductive sheets respectively connected with the L pole pin and the N pole pin, and the L pole pin hole and the N pole pin hole side of the housing are provided with The conductive seat is electrically connected to the L-pole socket and the N-pole socket respectively through wires. When the L-pole pin and the N-pole pin protrude from the housing, the conductive sheet is inserted into the corresponding conductive seat. Since the plug base is a movable structure, the present invention adopts the structure that when the L-pole plug and the N-pole plug extend out of the housing, the conductive sheet connected with the L-pole plug and the N-pole plug is inserted into the conductive seat and connected to the corresponding socket. It can avoid the problem that the wires move with the plug base caused by the direct connection of the wires, which may easily lead to the breakage of the wire connection, and improve the reliability of the socket converter.

Preferably, the housing is formed by fastening the upper housing and the lower housing, the insertion surface of the socket is located on the upper housing, and the insertion hole of the plug is located on the lower housing. The housing can adopt various structures, but usually it needs to have two opposite or adjacent planes, one for setting the socket and the other for setting the plug.

The beneficial effect of the present invention is that it effectively solves the problem that the ground pole pin cannot extend with the plug and is inconvenient to use existing in the plug retractable socket converter of the prior art. It can be extended or retracted with the plug base, which is convenient for conversion and portability, and has high practical value.

Description of drawings

Fig. 1 is a kind of structural sectional view of socket converter of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic diagram of an exploded structure of the socket converter of the present invention;

Fig. 4 is a structural cross-sectional view of the ground pole plug of the present invention;

Fig. 5 is a schematic diagram of an exploded structure of the ground pole plug of the present invention;

Fig. 6 is a schematic diagram of a three-dimensional structure of the plug base of the present invention;

Fig. 7 is a schematic diagram of a three-dimensional structure of the ground pole plug of the present invention;

Fig. 8 is a schematic diagram of the positional relationship between the plug base and the ground pin of the present invention;

Fig. 9 is a schematic structural view of the use state of the ground pin of the present invention;

Fig. 10 is a structural schematic diagram of the switching state of the ground pole plug of the present invention;

Fig. 11 is a structural schematic diagram of the conversion state of the earth pole plug in the present invention;

Fig. 12 is a structural schematic diagram of the switching state of the earth pole plug in the present invention.

In the figure: 1. socket, 2. ground pole base, 3. ground pole socket, 4. conductive chute, 5. plug base, 6. ground pole pin hole, 7. ground pole pin, 8. pin body , 9. Lever groove, 10. Lever, 11. Pin shaft, 12. Insertion part, 13. Limit part, 14. Conductive shrapnel, 15. Toggle block, 16. Chute, 17. Control board, 18. Button, 19. Button hole, 20. Conductive chute avoidance hole, 21. Plug base positioning rod, 22. Return spring, 23. Anti-off buckle, 24. Guide hole, 25. Connecting column, 26. Limiting step , 27. Sleeve, 28. Conductive sheet, 29. Conductive seat, 30. Wire, 31. Upper shell, 32. Lower shell, 33. Slot.

detailed description

The specific implementation of the present invention will be described in further detail below through examples and in conjunction with the accompanying drawings.

Example 1

In the embodiment 1 shown in Fig. 1, Fig. 2 and Fig. 3, a converter for retractable storage of plugs includes a housing with a five-hole socket 1 arranged on one side, and the housing is an upper housing 31 and a lower housing. The body 32 is buckled to form a square column structure, the insertion surface of the socket is located on the top surface of the upper housing, and the jack of the plug is located on the bottom surface of the lower housing. The housing is provided with a ground pole base 2 and a sliding plug base 5, and the plug base is provided with LN pole pins. The ground pole base is provided with a conductive chute 4, and the side of the plug base close to the conductive chute is provided with a ground pole pin hole 6, and the side of the plug base with the ground pole pin hole is slidably adapted to the conductive In the chute, the ground pole pin hole is close to the opening of the conductive chute, and a cylindrical ground pole pin 7 is slidably arranged in the ground pole pin hole. The ground pole pin includes a pin main body 8, the plug base and the ground pole pin There is a lever-type limit mechanism between them. After the plug base drives the LN pole pin to retract into the housing, the position between the plug base and the ground pole pin is limited by the lever-type limit mechanism and is in a linkage state.

Described lever-type position-limiting mechanism comprises the lever groove 9 that is vertically arranged on the front part of the bolt body, the front end of the lever groove extends to the front end face of the bolt body, a lever 10 is arranged in the lever groove, and the middle part of the lever passes through the pin shaft 11 and the lever groove. Hinged, the front end of the lever extends out of the lever groove to form the insertion part 12 of the ground pin, and the rear end of the lever tilts to the side away from the lever groove to form a limit part 13 (see Figure 4 Figure 5 Figure 7), the plug base After driving the plug to retract into the housing, the limit portion of the lever abuts against the plug base. The rear part of the plug body is a hollow structure, the rear end of the lever groove is connected with the hollow structure, and the rear end of the ground pole plug is provided with a slot 33 (see Figure 5), and the slot is provided with a conductive shrapnel slidingly connected with the conductive chute 14. One end of the conductive shrapnel is electrically connected to the main body of the plug, and the other end is electrically connected to the conductive chute. The conductive shrapnel of this embodiment is T-shaped, the vertical end of the T-shaped conductive shrapnel extends into the lever groove and abuts against the rear of the lever near the bottom of the lever groove, and the other two ends of the T-shaped conductive shrapnel protrude from the ground. The two sides of the pole bolt are in contact with the notch of the conductive chute. When the ground pole bolt moves relative to the conductive chute, the conductive shrapnel is slidably connected with the notch of the conductive chute to play a conductive role.

The plug base includes a toggle block 15 (see FIG. 6 ), the toggle block is arranged on the outer wall of the housing, and the housing is provided with a chute 16 corresponding to the toggle block (see FIG. 3 ). The housing is also provided with a control board 17 that slides and engages with the base of the ground pole. One side of the control board is provided with a button 18, and the housing is provided with a button hole 19 corresponding to the button. The middle part of the control board is provided with a conductive chute to avoid hole 20, the control board is provided with a plug base positioning rod 21, and the control board and the ground base are also provided with a return spring 22, one end of the return spring is in contact with the control board, and the other end of the return spring is in contact with the ground base. Butt against, the anti-off buckle 23 is also provided on the control panel. There are two return springs in this embodiment, which are arranged on two opposite corners of the control board. The control board is extended with a return spring top piece, and the corresponding ground pole base is provided with an accommodation groove. The return spring top piece and the reset spring The spring is placed in the corresponding accommodating groove; the side of the ground pole base facing the lower cavity is provided with three clamping plates, and the corresponding card is provided on the control board, and the control board and the ground pole base are slidingly engaged by the cards and the clamping plates .

The plug base is also provided with a guide hole 24 (see FIG. 6 ), and a connecting post 25 corresponding to the guide hole is provided between the ground base and the housing, and the plug base is sleeved on the connecting post through the guide hole. There are two connecting columns in this embodiment, which are arranged on the ground base. The free end of the connecting column is provided with a screw hole fixed to the lower casing. There is one guide hole on the plug base, which is socketed in one of them. Connect to the column.

The cross-section of the conductive chute in this embodiment is semicircular, and the rear end of the conductive chute is provided with a screw hole, and the conductive chute and the ground pole socket are fixed and electrically connected by screws. The ground pole pin is a cylindrical structure, the rear end of the ground pole pin is provided with a limit step 26, the slot is arranged in the radial direction of the limit step, and a bushing 27 is provided on the outer peripheral surface of the ground pole pin close to the insertion part.

The side of the L-pole pin and the N-pole pin of the plug base are provided with conductive sheets 28 respectively connected with the L-pole pin and the N-pole pin, and the side of the L-pole pin hole and the N-pole pin hole of the shell are correspondingly provided with conductive seats. 29. The conductive seat is electrically connected to the L-pole socket and the N-pole socket respectively through the wire 30. When the L-pole pin and the N-pole pin protrude from the housing, the conductive sheet is inserted into the corresponding conductive seat (see Figure 3). The plug of the embodiment is an American standard three-pole plug.

Example 2

The shell of embodiment 2 is a cylindrical structure formed by buckling the upper shell and the lower shell. The jack of the three-pole socket is located on the top surface of the upper shell, and the jack of the plug is located on the bottom surface of the lower shell. For the British standard three-pole plug. The cross-section of the conductive chute in this embodiment is rectangular, the ground pole pin is a square column structure, and the outer peripheral surface of the ground pole pin close to the insertion part is provided with a rectangular bushing, and the rest is the same as in embodiment 1.

When the ground pole plug of the present invention is in use, the plug is in the extended state (see Figure 9), at this time, the L pole pin and the N pole pin protrude from the lower housing, the conductive sheet is inserted into the corresponding conductive seat, and the L pole pin and the N pole pin are inserted into the corresponding conductive seat. The pole pin is electrically connected to the L pole socket and the N pole socket respectively through the conductive sheet, the conductive seat and the wire, and the ground pole pin is electrically connected to the ground pole socket through the conductive shrapnel, the conductive chute; The rear end (limiting part) abuts against the plug base (see Figure 8), restricting the ground pin from retreating in the ground pin hole, and the plug base positioning rod on the control panel bears against the plug base, preventing the plug base from Back off, the socket converter works fine. When it is necessary to change the three-pole plug into a two-pole plug, the insertion part of the ground pin is moved to the side of the lever groove (see Figure 10), and the lever rotates at this time, and the limit part at the rear of the lever and the plug base Detach and enter the lever groove, at this time, you can press the ground pole pin inward (see Figure 11), so that the ground pole pin retracts into the lower housing (see Figure 12), and the three-pole plug becomes a two-pole plug at this time; when the socket When the converter is stored, press the button on the side of the control board, the plug base positioning rod on the control board will be separated from the plug base, at this time, move the toggle block on the plug base, and the plug base can move along the chute After the plug base is completely retracted into the housing, the lever limit part of the ground pin can be automatically buckled with the plug base. When it is used next time, the ground pin can move together with the plug base and Extend the housing.

In addition to the above-mentioned embodiments, within the scope disclosed in the claims and description of the present invention, the technical features or technical data of the present invention can be re-selected and combined to form new implementations. These implementations of the present invention that have not been described in detail The method can be easily realized by those skilled in the art without creative work, so these implementations that are not described in detail should also be regarded as specific examples of the present invention and fall within the protection scope of the present invention.

Claims (9)

1. a kind of converter of the scalable storage of plug, including side are disposed with socket（1）Housing, it is characterized in that, in housing Provided with ground pole base（2）And slidingtype Plug base（5）, Plug base is provided with LN poles latch, and ground pole base is provided with conduction Chute（4）, Plug base is close to the side of conductive chute provided with earth polar pin hole（6）, slideably it is provided with the pin hole of earth polar Earth polar latch（7）, lever position-limit mechanism is provided between Plug base and earth polar latch, Plug base drives LN poles latch retract It is spacing and in linkage status by lever position-limit mechanism between Plug base and earth polar latch after in housing；Describedly Pole latch includes bolt body（8）, the lever position-limit mechanism lever slot anterior including being disposed longitudinally on bolt body （9）, lever slot is interior to be provided with lever（10）, the middle part of lever passes through bearing pin（11）It is hinged with lever slot, the rear end of lever is to remote The side of lever slot tilts to form limiting section（13）, Plug base driven after plug is retracted into housing, the limiting section of lever with Plug base is abutted.

2. the converter of the scalable storage of plug according to claim 1, it is characterized in that, the front end extension of the lever slot To the front end face of bolt body, the plug division of lever slot formation earth polar latch is extended in the front end of lever（12）.

3. the converter of the scalable storage of plug according to claim 1, it is characterized in that, the rear portion of bolt body is hollow Structure, the rear end of lever slot is connected with hollow structure, and the rear end of earth polar latch is provided with slot（33）, slot is provided with to be slided with conduction The electroconductive elastic sheet that groove is slidably connected（14）, electroconductive elastic sheet one end electrically connected with bolt body, and the other end is electrically connected with conductive chute.

4. the converter of the scalable storage of plug according to claim 3, it is characterized in that, electroconductive elastic sheet is T-shaped, and T-shaped is led The vertical end of electric shell fragment is extended into lever slot and abutted with lever rear portion close to the side of lever slot bottom land, T-shaped electroconductive elastic sheet Other two ends stretch out earth polar latch both sides and abutted with the notch of conductive chute.

5. the converter of the scalable storage of plug according to claim 1, it is characterized in that, the rear portion of bolt body is provided with limit Position step（26）.

6. the converter of the scalable storage of plug according to claim 1, it is characterized in that, the earth polar latch close to plug division Outer peripheral face is provided with sleeve pipe（27）.

7. the converter of the scalable storage of plug according to claim 1, it is characterized in that, described conductive chute it is transversal Face semicircular in shape or rectangle, described earth polar latch correspond to cylindrical-shaped structure or flat column structure respectively.

8. the converter of the scalable storage of plug according to claim 1, it is characterized in that, the Plug base is provided with ground The side of pole pin hole is slideably fitted in conductive chute, and the earth polar pin hole is at the opening of conductive chute.

9. the converter of the scalable storage of plug according to claim any one of 1-8, it is characterized in that, it is additionally provided with housing The control panel of clamping is slided with ground pole base（17）, one side of control panel is provided with button（18）, housing is provided with corresponding with button Key hole（19）, the middle part of control panel is provided with conductive chute and avoids hole（20）, control plate face is provided with Plug base locating rod （21）, control panel and ground pole base are additionally provided with back-moving spring（22）, one end of back-moving spring abuts with control panel, back-moving spring The other end is abutted with ground pole base, and fastener is additionally provided with control panel（23）.