Multi-specification combined socket jack structure

By designing a multi-specification combination socket structure, the problem of limited socket specifications and loose distribution was solved, enabling multi-specification compatibility and stable plug-in of the socket, improving performance and production efficiency, and providing safety protection against accidental electric shock.

CN224110525UActive Publication Date: 2026-04-10DONGGUAN WONTRAVEL ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN WONTRAVEL ELECTRIC CO LTD
Filing Date
2025-03-21
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

The existing adapter sockets have few socket specifications and are loosely distributed, which cannot meet the needs of electrical plugs in different regions, resulting in inconvenience.

Method used

Design a multi-specification combined socket structure, including conductive hardware components and combined socket panels. The socket positions are set as long strip, rectangular, vertical and inclined structures. Combined with the guide surface of the protective door and the elastic element, the compact arrangement and stable plug connection of the multi-specification sockets can be achieved.

Benefits of technology

It improves the performance of the socket, can adapt to more plug specifications, has good plug-in stability, has a compact structure, is easy to manufacture, and has a safety function to prevent accidental electric shock.

✦ Generated by Eureka AI based on patent content.

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Abstract

A multi-specification combined socket and jack structure comprises a support provided with a conductive hardware assembly and a shell for installing the support in the support, a combined socket panel corresponding to the conductive hardware assembly is arranged on the shell, a combined jack group is arranged on the combined socket panel, and the conductive hardware assembly is arranged on the combined jack group. The combined jack group comprises a first jack position and a second jack position, wherein the first jack position extends in a set direction and is of a long-strip-shaped structure; the second jack positions are respectively positioned in the two first jack positions, and each of the two second jack positions comprises a first part and a second part; and the number of the third jack positions is two, the two third jack positions are located on the two sides of the first jack position respectively, and each third jack position comprises a horizontal part and an inclined part. According to the technical scheme, the structure of the jack is optimized, through the technical scheme, more jack positions can be provided by only arranging five hole sites on the panel, and the structure is more compact and reasonable.
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Description

TECHNICAL FIELD

[0001] The utility model relates to conversion socket technical field, concretely relates to a multi-specification combined socket jack structure. BACKGROUND

[0002] With the gradual improvement of people's life, there are more and more opportunities to go abroad or on business, because the power socket standards of various countries are different, therefore, the electric plug has multiple styles of shapes, so that people can not use the local socket when taking out the electrical appliances in the country, for this, it brings great inconvenience to people's travel.

[0003] Therefore, in order to facilitate people's appearance, a conversion socket appears on the market, which is provided with a plurality of different specification jack positions, so as to facilitate the use of different plug specifications in different regions, and more convenient for users to travel in different regions.

[0004] However, in the transmission conversion socket, the specification of the jack is few, only a few main regional jack specifications are set, such as American standard, European standard, Japanese standard and the like, but the above-mentioned specification jacks are relatively loose, and are in a state of mutual independence or separation, therefore, in order to improve the use performance of the conversion socket and simplify the structure of the socket jack, the applicant puts forward a new technical scheme. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a multi-specification combined socket jack structure, in order to solve the above technical problem, the utility model adopts the following technical scheme:

[0006] A multi-specification combined socket jack structure, comprising a support provided with a conductive hardware component and a shell in which the support is installed, a combined socket panel corresponding to the conductive hardware component is arranged on the shell, characterized in that a combined jack group is arranged on the combined socket panel, the combined jack group comprises:

[0007] A first jack position, the first jack position is arranged in a long strip structure along a certain direction, and the end of the first jack position is provided with a first hole position in a rectangular structure;

[0008] A second jack position, the second jack position is respectively arranged at two positions of the first jack position and is arranged at the middle position of the first jack position, and the two second jack positions each comprise a first part arranged along the extension direction of the first jack position and a second part arranged on the side of the first part away from the first jack position;

[0009] The third jack position is arranged at the end of the first jack position and has a distance from the second jack position, the third jack position includes two third jack positions arranged at two sides of the first jack position respectively, and the two third jack positions include a horizontal part arranged along the direction perpendicular to the extending direction of the first jack position and an inclined part arranged at one end of the horizontal part close to the first jack position, one end of the inclined part is communicated with the end of the horizontal part, and the other end is inclinedly extended towards the extension line direction of the first jack position.

[0010] Further, the first jack position is sequentially provided with an upper part, a middle part and a lower part from one end extending towards one end of the third jack position, the first hole is formed in the upper part, and a second hole is further arranged above the upper part, the second hole is in a cylindrical structure and is communicated with the first hole.

[0011] Further, the middle part is further provided with two third holes and fourth holes in a cylindrical structure arranged side by side along the extending direction of the first jack position, the third hole has a diameter smaller than that of the second hole, and a beak structure is arranged between the third hole and the second hole.

[0012] Further, the lower part is sequentially provided with a fifth hole and a sixth hole along the extending direction of the first jack position, the fifth hole and the sixth hole are both in a cylindrical structure, and a beak structure is arranged at the position where the fifth hole is communicated with the middle part.

[0013] Further, the middle part is further provided with a seventh hole, the seventh hole is arranged at the position penetrating the lower part, and the seventh hole has a diameter smaller than that of the third hole.

[0014] Further, the second part is in a cylindrical structure and is connected with the middle segment position of the first part.

[0015] Further, the second part has a diameter smaller than that of the second hole and larger than that of the seventh hole.

[0016] Further, the horizontal part is further provided with an eighth hole at the end where the horizontal part is connected with the inclined part, the eighth hole has a diameter smaller than that of the second hole and larger than that of the seventh hole.

[0017] Further, the bracket is provided with a protection door corresponding to the combined socket panel, the protection door is used to shield the second jack and the third jack, the protection door is elastically and slidably connected to the bracket, and first and second guide surfaces obliquely arranged corresponding to the second jack and the third jack are arranged on the protection door.

[0018] Further, the protection door comprises:

[0019] A first block is slidably connected to the bracket along the extension direction of the first jack, a first side arm corresponding to the second jack is formed on the first block, and the first guide surface is formed on the first side arm.

[0020] A second block is arranged opposite to the first block and spaced apart from the first block by a spacing space, and is slidably connected to the bracket along the extension direction of the first jack, a second side arm corresponding to the third jack is formed on the second block, and the second guide surface is formed on the second side arm.

[0021] An elastic member is arranged between the first block and the second block, and is used to elastically support the first block and the second block to be separated from each other, and to close the second jack and the third jack from each other.

[0022] The first block and the second block are provided with a guide structure therebetween, and the guide structure comprises a guide rod and a guide hole in which a sliding abutment is formed.

[0023] The first block and / or the second block is further provided with a hole-avoiding position corresponding to the first jack.

[0024] The utility model discloses the following beneficial effects are produced:

[0025] The utility model discloses an embodiment provides a kind of multi-specification combination value socket jack structure, combination socket panel is provided with combination jack group, this jack group includes first jack position, second jack position and third jack position, wherein first jack position constitutes ground jack position, for in the process of plug and this socket mutual plug-in, socket and ground wire mutual plug-in, first jack position is set as the long strip structure of extension along certain direction, more different specification plug ground pin can be provided with plug-in space position, simultaneously, the first hole site of first jack position at end is set as the structure of rectangle, so that it can be accurately plugged in during the process of some specified as cuboid ground pin mutual plug-in, and provide certain limiting effect, so as to guarantee the stability of plug-in, simultaneously, second jack position and third jack position are provided with side by side along the extension direction of first jack position, so as to provide more plug-in position for combination socket panel, wherein first part and second part in second plug-in site are set to vertical direction, at this time, two different shapes of ground pin can be provided, especially it can satisfy vertical ground pin plug-in, to be able to expand more ground pin specification, satisfy more use demand of user;Meanwhile, third jack position is provided with horizontal part and inclined part, wherein the setting of horizontal part and inclined part can satisfy the ground pin with inclination and plug-in, improve the number of jack for different specification ground pin plug-in. Through the technical scheme, first jack that is mutually plugged in with ground pole is set as the structure of long strip, simultaneously, the jack that is mutually connected with fire line and zero line is set as two groups, it is second jack position and third jack position respectively, so as to improve the number of different specification jack, satisfy more use demand of user, simultaneously, the structure of jack is optimized in the technical scheme, through the technical scheme, five hole sites can be provided on panel to provide more jack position, structure is more compact and reasonable, and convenient for factory production. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structural schematic diagram of the utility model.

[0027] Figure 2 It is the explosive structural schematic diagram of the utility model.

[0028] Figure 3 It is the structural schematic diagram of combination socket panel in the utility model.

[0029] Figure 4 It is the explosive structural schematic diagram of combination socket panel and support in the utility model.

[0030] Figure 5 It is the structural schematic diagram of protection door in the utility model.

[0031] Figure 6 It is the explosive structural schematic diagram of protection door in the utility model.

[0032] In the figure: 100 - bracket; 101 - hardware assembly; 110 - shell; 200 - combined socket panel; 210 - combined jack group; 300 - first jack site; 301 - first hole site; 400 - second jack site; 410 - first part; 420 - second part; 500 - third jack site; 510 - horizontal part; 520 - inclined part; 310 - upper part; 320 - middle part; 330 - lower part; 311 - second hole site; 321 - third hole site; 322 - fourth hole site; 331 - fifth hole site; 332 - sixth hole site; 323 - seventh hole site; 511 - eighth hole site; 600 - protection door; 601 - first guide surface; 602 - second guide surface; 610 - first block; 611 - first side arm; 620 - second block; 621 - second side arm; 630 - elastic piece; 605 - guide rod; 603 - guide hole; 604 - avoiding site. DETAILED DESCRIPTION

[0033] For the convenience of understanding of those skilled in the art, the present application is further described below in combination with the embodiments and the drawings, and the content mentioned in the embodiments is not a limitation on the present application. The present application is described in detail below in combination with the drawings.

[0034] The utility model embodiment provides a kind of multi-specification combination value socket jack structure, combination socket panel 200 is provided with combination jack group 210 above, this combination jack group 210 includes first jack position 300, second jack position 400 and third jack position 500, wherein first jack position 300 constitutes ground jack position, to be mutually inserted in the process that plug and this socket are mutually inserted, socket and ground wire are mutually inserted, first jack position 300 is set as the long strip structure of extension along certain direction, more different specification plug ground pin can be provided to insert space position, simultaneously, the first hole position 301 of first jack position 300 in end part is set as the structure of rectangle, to be able to accurately insert in the process that some specified as cuboid pin is mutually inserted, and provide certain limiting effect, to guarantee the stability of insertion, simultaneously, second jack position 400 and third jack position 500 are provided with side by side along the extension direction of first jack position 300, to provide more insertion position for combination socket panel 200, wherein first part 410 and second part 420 being arranged in vertical direction are provided in second insertion site, at this time, two different shapes of pins can be provided, especially can meet the insertion of vertical pin, to be able to expand more pin specification, satisfy the more use demand of user;Simultaneously, third jack position 500 is provided with horizontal part 510 and inclined part 520, wherein the setting of horizontal part 510 and inclined part 520 can meet the pin of inclined insertion, improve the number of jack for different specification pin insertion. Through the technical scheme, the first jack that is mutually inserted with ground pole is set as the structure of long strip, simultaneously, the jack that is mutually connected with fire line and zero line is set as two groups, second jack position 400 and third jack position respectively, to be able to improve the number of different specification jack, satisfy the more use demand of user, simultaneously, the structure of jack is optimized in the technical scheme, in the technical scheme, five hole positions can be provided in combination socket panel 200 to provide more jack position, structure is more compact and reasonable, and convenient for factory to produce.

[0035] As Figures 1-4As shown, the utility model discloses a kind of multi-specification combined socket jack structure provided in the embodiment, including the bracket 100 with the conductive hardware component 101 of being provided with and the shell 110 of being installed in its inside with bracket 100, the combined socket panel 200 corresponding with conductive hardware component is provided on the shell 110, combined socket panel 200 is provided with combined jack group 210, combined jack group 210 includes first jack position 300, second jack position 400 and third jack position 500, wherein, first jack position is arranged in long strip structure along a given direction, and the end of first jack position 300 is provided with the first hole position 301 of rectangular structure;Second jack position includes two respectively in first jack position 300, and is arranged in the middle section position of first jack position 300, and two second jack positions 400 include first part 410 along the extension direction of first jack position 300 and second part 420 on the side of first part 410 away from first jack position 300;Third jack position 500 is arranged in the last section position of first jack position 300, with second jack position 400, third jack position 500 includes two respectively on the two sides of first jack position 300, and two third jack positions 500 include horizontal part 510 along the extension direction perpendicular to first jack position 300 and inclined part 520 arranged at one end of horizontal part 510 close to first jack position 300, one end of inclined part 520 is communicated with the end of horizontal part 510, and the other end is inclinedly extended towards the extension line direction of first jack position 300.

[0036] In the process of using, first jack position 300 corresponds to ground wire, second jack position 400 includes two respectively in first jack position 300, the two second jack positions 400 correspond to fire wire and zero line respectively, same, two third jack positions 500 also correspond to fire wire and zero line respectively, and first jack position 300 is arranged in a direction, so as to provide jack position of ground wire for second jack position 400 and third jack position 500 respectively, wherein second jack position 400 and third jack position 500 are arranged in different shapes, so as to adapt to different specifications of plug pin and mutually plug, improve the use performance of socket, through the technical scheme provided by the utility model, five hole positions are only arranged on combined socket panel 200, which can meet the plug-in of different specifications of plug pin, and first jack position 300, second jack position 400 and third jack position 500 are respectively one hole position, and different shapes are arranged on it, to adapt to different specifications of plug pin, so as to meet the plug-in of different plug pins, by mutually penetrating and having different shapes, through the above arrangement, the jack position can be more compact, the structure on combined socket panel 200 will not be loose, and through the optimization of jack, the factory can be more convenient for processing and producing socket.

[0037] In the embodiment, as shown in Figure 3 In order to be more stable during the process of plugging into different specifications of ground pin, and to ensure that the pin does not shake in the jack position, in the embodiment, the first jack position extending from one end to the third jack position 500 is sequentially provided with an upper part 310, a middle part 320 and a lower part 330, wherein the first hole 301 is formed in the upper part 310, and the second hole 311 is further provided above the upper part 310, the second hole 311 is a cylindrical structure, and is in communication with the first hole 301. By setting the first jack position 300 as three parts, different jack shapes can be set according to the arrangement of the three parts, so as to be adapted to different specifications of pins.

[0038] In the embodiment, two cylindrical third hole 321 and fourth hole 322 are provided above the middle part 320, which are arranged side by side along the extension direction of the first jack position 300, wherein the diameter of the third hole 321 is smaller than that of the second hole 311, and a throat structure is provided between the third hole 321 and the second hole 311. By setting the third hole 321 and the fourth hole 322 to different diameters, this structure can facilitate the insertion of pins with different specifications, and the diameters of the third hole 321 and the fourth hole 322 are adapted to the diameters of the corresponding pins, so that the inner wall of the hole and the outer wall of the pin can be matched with each other during plugging, ensuring the stability of the pin plugging. And by setting a throat structure between the upper part 310, the stability during the plugging process can be further ensured, avoiding damage to the plug or conductive hardware during plugging due to the movement of the pin corresponding to the ground wire towards the upper part 310 during plugging.

[0039] In the embodiment, the fifth hole 331 and the sixth hole 332 are sequentially provided in the lower part 330 along the extension direction of the first jack position 300, the fifth hole 331 and the sixth hole 332 are both cylindrical structures, and a throat structure is provided between the fifth hole 331 and the middle part 320.

[0040] In the embodiment, in order to increase the number of jack positions of the middle part 320 and illustrate the throat structure between the middle part 320 and the lower part 330, a seventh hole 323 is further provided above the middle part 320, the seventh hole 323 is provided at a position penetrating the lower part 330, and the diameter of the seventh hole 323 is smaller than that of the third hole 321. By setting the seventh hole 323, the number of jack positions can be increased.

[0041] In the embodiment, the second plug hole is used to correspond to the live wire and the zero line respectively, the first part 410 and the second part 420 are arranged to adapt to different specifications of the pins, the second part 420 is arranged in a cylindrical structure and is connected with the middle section of the first part 410, the second plug hole 400 is formed as a whole hole by the intercommunication of the first part 410 and the second part 420, the integrity of the second plug hole 400 is ensured, and the structure of the second plug hole 400 is more compact and cannot be loose.

[0042] In the embodiment, in order to improve the stability of the plug and the socket, the diameter of the second part 420 is smaller than that of the second hole 311 and larger than that of the sixth hole 332, and the diameter is adaptively arranged, so that the plug can be in contact with the inner wall of the socket when the plug and the socket are plugged, and the stability of the plug is improved.

[0043] In the embodiment, the eighth hole 511 is arranged on the horizontal part 510, the eighth hole 511 is arranged at the end of the horizontal part 510 and the inclined part 520, the diameter of the eighth hole 511 is smaller than that of the second hole 311 and larger than that of the sixth hole 332, that is, the eighth hole 511 is arranged on the horizontal part 510 to form two holes for different specifications of the pins, thereby increasing the number of the third plug holes 500 and improving the use performance.

[0044] In the embodiment of the utility model, the plug specifications that can be combined by the first plug hole 300, the second plug hole 400 and the third plug hole 500 include:

[0045] The first hole 301 and the two horizontal parts 510 form a British Type G plug hole;

[0046] The two eighth holes 511 form a German Type F plug hole;

[0047] The two second parts 420 form a European Type C plug hole;

[0048] The two first parts 410 and the sixth hole 332 form an American Type B plug hole;

[0049] The two first parts 410 form an American Type A plug hole;

[0050] The two inclined parts 520 and the third hole 321 and the fourth hole 322 form an Australian Type I plug hole;

[0051] The two second parts 420 and the third hole 321 form an Italian Type L plug hole;

[0052] The two second parts 420 and the second hole position 311 constitute a Type N jack;

[0053] The two second parts 420 and the seventh hole position 323 constitute a Type J jack;

[0054] The two second parts 420 and the fifth hole position 331 constitute a Type H jack;

[0055] The two eighth hole positions 511 and the fourth hole position 322 constitute a Type O jack;

[0056] The two eighth hole positions 511 and the second hole position 311 constitute a Type D jack.

[0057] In the embodiment, in order to improve the safety performance of the socket, a protection door 600 corresponding to the combined socket panel 200 is arranged on the support 100, the protection door 600 is used to shield the second socket position 400 and the third socket position 500, the protection door 600 is elastically and slidably connected on the support 100, and first and second guide surfaces 601 and 602 obliquely arranged corresponding to the second socket position 400 and the third socket position 500 are arranged on the protection door 600. The protection door 600 closes the second socket position 400 and the third socket position 500 through the first and second guide surfaces 601 and 602, so that the socket can be in a closed state during use, and the situation of electric shock caused by accidental touch can be effectively prevented.

[0058] Examples of the specific structure of the protection door 600 are given in the embodiment, such as Figures 4-6The protection door 600 comprises a first block 610, a second block 620 and an elastic member 630. The first block 610 is slidably connected to the support 100 along the extending direction of the first jack position 300. A first side arm 611 corresponding to the second jack position 400 is formed on the first block 610, and a first guide surface 601 is formed on the first side arm 611. The second block 620 is oppositely arranged to the first block 610 and is spaced apart from the first block 610 by a spacing space, and is slidably connected to the support 100 along the extending direction of the first jack position 300. A second side arm 621 corresponding to the third jack position 500 is formed on the second block 620, and a second guide surface 602 is formed on the second side arm 621. The elastic member 630 is arranged between the first block 610 and the second block 620, and is used to elastically support the first block 610 and the second block 620 to be separated from each other, and to respectively close the second jack position 400 and the third jack position 500. Meanwhile, a guide structure is arranged between the first block 610 and the second block 620, and the guide structure comprises a guide rod 605 and a guide hole 603 slidably connected to the guide rod 605. An avoiding hole position corresponding to the first jack position 300 is further arranged on the first block 610 and / or the second block 620.

[0059] When the plug is not inserted, the first block 610 and the second block 620 are separated from each other under the elastic force of the elastic member 630, so as to close the second jack position 400 and the third jack position 500, thereby preventing electric shock caused by accidental touch. Since the first jack position 300 is a hole position corresponding to the ground wire, the first jack position 300 can be not closed and is inserted into the ground wire through the avoiding hole 604. When the plug is inserted, the pin is inserted into the second jack position 400 or the third jack position 500, and the pin abuts against the first guide surface 601 or the second guide surface 602, and the first block 610 or the second block 620 is moved to the other direction under the pressure, so as to gradually open the second jack position 400 or the third jack position 500, thereby facilitating the pin to be inserted into the second jack position 400 or the third jack position 500 to realize electrical connection. In the embodiment, in order to stabilize the first block 610 and the second block 620 during the sliding along the support 100, a guide hole 603 is formed on the first block 610, and a guide rod corresponding to the guide hole 603 is arranged on the second block 620, so as to stabilize the first block 610 or the second block 620 during the sliding.

[0060] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiment with equivalent changes is equivalent to the above embodiment. Any simple modification, equivalent change and modification of the above embodiment according to the present application technical solution are within the scope of the present application technical solution.

Claims

1. A multi-specification modular jack structure comprising a housing having a support provided with electrically conductive hardware components and a support housing provided with a combined jack panel corresponding to the electrically conductive hardware components, characterized in that, The combination socket panel is provided with a combination jack group, which comprises: A first jack position, which is arranged in a long strip structure along a certain direction, and the end of the first jack position is provided with a first hole position in a rectangular structure; A second jack position, which is respectively arranged at both ends of the first jack position and is arranged at the middle of the first jack position, and both the second jack positions comprise a first part arranged along the extension direction of the first jack position and a second part arranged on the side of the first part away from the first jack position; A third jack position, which is arranged at the end of the first jack position and is spaced apart from the second jack position, and the third jack position comprises two third jack positions respectively arranged on both sides of the first jack position, and both the third jack positions comprise a horizontal part arranged perpendicular to the extension direction of the first jack position and an inclined part arranged at one end of the horizontal part close to the first jack position, one end of the inclined part is communicated with the end of the horizontal part, and the other end is inclined and extended towards the extension line of the first jack position.

2. A multi-specification modular jack structure according to claim 1, wherein The first jack position is sequentially provided with an upper part, a middle part and a lower part from one end towards the extension end of the third jack position, wherein the first hole position is formed in the upper part, and a second hole position is further arranged on the upper part, the second hole position is in a cylindrical structure and is communicated with the first hole position.

3. A multi-specification modular jack structure according to claim 2, wherein A third hole position and a fourth hole position in a cylindrical structure are arranged side by side on the middle part along the extension direction of the first jack position, wherein the diameter of the third hole position is smaller than the diameter of the second hole position, and a beak structure is arranged between the third hole position and the second hole position.

4. A multi-specification modular jack structure according to claim 3, wherein The lower part is sequentially provided with a fifth hole position and a sixth hole position along the extension direction of the first jack position, and both the fifth hole position and the sixth hole position are in a cylindrical structure, and a beak structure is arranged at the position communicated with the middle part.

5. A multi-specification modular jack structure according to claim 4, wherein A seventh hole position is further arranged on the middle part, the seventh hole position is arranged at the position penetrating the lower part, and the diameter of the seventh hole position is smaller than the diameter of the third hole position.

6. A multi-specification modular jack structure as defined in Claim 5 wherein, The second part is in a cylindrical structure and is connected with the middle part of the first part.

7. A multi-specification modular jack structure as defined in claim 6 wherein, The diameter of the second part is smaller than the diameter of the second hole position and larger than the diameter of the seventh hole position.

8. The multi-specification modular jack structure of claim 5, wherein, An eighth hole position is further arranged on the horizontal part, the eighth hole position is arranged at the end where the horizontal part and the inclined part are connected, and the diameter of the eighth hole position is smaller than the diameter of the second hole position and larger than the diameter of the seventh hole position.

9. The multi-specification modular jack structure of claim 1 wherein, A protection door corresponding to the combination socket panel is arranged on the bracket, the protection door is used to shield the second jack position and the third jack position, the protection door is elastically and slidably connected on the bracket, and a first guide surface and a second guide surface arranged in an inclined manner corresponding to the second jack position and the third jack position are arranged on the protection door.

10. The multi-specification modular jack structure of claim 9, wherein, The protection door comprises: A first block body is slidably connected to the support along the extension direction of the first jack site, a first side arm corresponding to the second jack site is formed on the first block body, and the first guide surface is formed on the first side arm; A second block body is oppositely arranged with the first block body and is spaced apart from the first block body by a spacing space, and is slidably connected to the support along the extension direction of the first jack site, a second side arm corresponding to the third jack site is formed on the second block body, and the second guide surface is formed on the second side arm; An elastic member is arranged between the first block body and the second block body to elastically support the first block body and the second block body to be separated from each other, and to respectively close the second jack site and the third jack site from each other; The guide structure includes a guide rod and a guide hole in which the sliding abutment is formed. The first block body and / or the second block body is further provided with a hole-avoiding site corresponding to the first jack site.