An expansion jack

Abstract

This utility model proposes an expansion socket, including a socket body with an expansion port; a plug cover on the side of the socket body, and a telescopic sliding opening corresponding to and connected to the inner cavity of the plug cover; an expansion plug with prongs on the back, located inside the plug cover and slidably adapted to the telescopic sliding opening; the back of the plug cover is open, and a pressing port is provided on the front; the expansion plug includes a back seat and a pressing cover located inside the pressing port, the side wall of the back seat has an anti-disengagement guide, the end of the anti-disengagement guide has an anti-disengagement hook, and the inner wall of the plug cover has a guide groove for guiding the anti-disengagement hook to slide along the insertion and removal direction of the prongs, and one end of the guide groove corresponding to the back of the plug cover has an anti-disengagement side wall for preventing the anti-disengagement hook from disengaging. This utility model has the advantages of easy insertion into a socket and adjustable according to the thickness of the wall socket while maintaining its aesthetic appearance.

Description

Technical Field

[0001] This utility model relates to the field of insert boards, specifically to an extension insert board. Background Technology

[0002] Existing extension cords are divided into portable and fixed types. Portable extension cords generally have cables and plugs attached to the cord body, allowing for easy relocation. Fixed extension cords have prongs on the cord body, which are directly inserted into wall sockets. Therefore, fixed extension cords rely entirely on the connection between the prongs and the socket for fixation. Since the panel of a typical socket protrudes from the wall, after the prongs on the back of the extension cord are fixed to the socket, the back of the extension cord only forms a small area of ​​contact and support with the socket panel. There is often a gap between most of the back of the extension cord and the wall. When plugging or unplugging, uneven force can easily cause the extension cord to tilt and fall off. In addition, the instability of the connection between the extension cord and the socket relying solely on the prongs increases the possibility of prong damage.

[0003] To address the aforementioned issues, the applicant filed a patent application on August 21, 2024, for a wall socket expansion strip with patent number CN202422033315.8. The expansion strip includes a strip body and an expansion plug. The strip body has several expansion ports, and the expansion plug has pins on its rear side wall. The strip body has a plug cover connected to the strip body on its side. The plug cover has a telescopic sliding opening on its rear side wall. The expansion plug is located within the telescopic sliding opening and is slidably disposed relative to the strip body and the plug cover. The sliding direction of the expansion plug relative to the strip body and the plug cover is towards the insertion / removal direction of the pins.

[0004] Although the aforementioned patent achieves the sliding of the extension plug to adapt to panels of different thicknesses and the fit of the socket body to the wall, the applicant found that the insertion of the extension plug lacked reliable support during actual operation and use (especially when the entire socket body was kept parallel to the wall for insertion). It was easy for the extension plug to retract before being inserted into the socket, resulting in the extension plug not being able to be fully inserted into the socket. Therefore, in actual operation, it is often necessary to first place the socket body at a slight angle to the wall or socket, push the extension plug into the socket first, and then place the socket body flat on the wall. This operation has low reliability and is easy to damage the socket holes of the plug pins. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide an extension plug that is easy to insert into a socket and can be adjusted according to the thickness of the wall socket while ensuring its aesthetic appearance.

[0006] To address the above problems, the following technical solution is provided: an expansion socket, comprising a socket body, wherein the socket body has a plurality of expansion slots on its front and / or sides; the side of the socket body has an extended plug cover that connects to the socket body; the socket body has a telescopic sliding opening that corresponds to and connects to the inner cavity of the plug cover; further comprising an expansion plug with pins on its back, the expansion plug being located inside the plug cover and slidingly adapted to the telescopic sliding opening to slide in the pin insertion / removal direction; the pins are connected to the expansion slots inside the socket body via wires through the telescopic sliding opening, and the plug cover corresponds to the expansion slots on the back of the socket body. The device is open and has a pressing port on the front of the plug body. The extension plug includes a rear seat that slides along the insertion and removal direction of the plug pins on the back of the plug cover and a pressing cover that slides along the insertion and removal direction of the plug pins inside the pressing port. The plug pins are mounted on the rear seat, and the rear seat is slidably adapted to the telescopic sliding port. The side wall of the rear seat is provided with an anti-disengagement guide extending towards the pressing cover. The end of the anti-disengagement guide is provided with an anti-disengagement hook. The inner wall of the plug cover is provided with a guide groove for guiding the anti-disengagement hook to slide along the insertion and removal direction of the plug pins. One end of the guide groove corresponding to the back of the plug cover is provided with an anti-disengagement side wall for preventing the anti-disengagement hook from disengaging.

[0007] The present invention is further configured such that the inner side of the side of the rear seat facing the press cover is provided with several baffles, and the outer edge of the end of the press cover facing the rear seat is provided with a baffle. When the press cover is dislodged in the direction of the front of the insert plate body, the baffle and the baffle abut against each other to prevent dislodging.

[0008] The present invention is further provided with a support spring between the pressing cover and the rear seat for supporting the pressing cover so that it moves away from the rear seat in the insertion and removal direction of the pin.

[0009] The present invention is further configured such that the support springs are in multiple sets, arranged at multiple points around the pins on the projection surface between the press cover and the back seat.

[0010] The present invention is further configured such that a spring cylinder is provided on the side of the pressing cover facing the rear seat, a spring post is provided on the side of the rear seat facing the pressing cover, one end of the support spring is inserted into the spring cylinder, and the other end is sleeved on the outside of the spring post.

[0011] The present invention is further configured such that the anti-disengagement hook has ratchet teeth arranged at intervals along the insertion and removal direction of the plug on the side facing the guide groove; the guide groove has a ratchet bar arranged along the insertion and removal direction of the plug on the side facing the anti-disengagement hook; and the rear seat is positioned by the ratchet teeth and the ratchet bar engaging when it slides relative to the plug cover along the insertion and removal direction of the plug.

[0012] The present invention is further configured such that the anti-detachment guide is an elastic arm, which causes the ratchet and the ratchet to disengage when the rear seat is subjected to a force in the direction of insertion and removal of the pin and reaches a predetermined threshold, and causes the ratchet and the ratchet to re-engage and reposition when the force on the rear seat in the direction of insertion and removal of the pin is less than the predetermined threshold or disappears.

[0013] The present invention is further configured such that the anti-detachment guide and the guide groove adapted thereto are multiple sets; the anti-detachment guide is located on both sides of the rear seat, and the guide groove is located on both sides of the inner wall of the plug cover.

[0014] The present invention is further provided that the back of the insert plate body is provided with fixing holes / hanging holes.

[0015] The present invention is further provided that the back of the insert plate body is provided with an adhesive surface.

[0016] The beneficial effects of this utility model are:

[0017] 1. By opening a pressing port on the plug cover, pressure can be applied to the pressing cover during installation, causing it to push the back seat towards the back of the socket body to form a supporting force. This allows the plug to be stably inserted into the socket, and then the socket body is pressed against the wall. The back seat and the telescopic sliding port are adapted to each other for adaptive compensation adjustment, which achieves effective contact between the expansion plug and the socket, and also effective contact between the socket body and the wall. The anti-disengagement guide's anti-disengagement hook is adapted to the anti-disengagement side wall of the guide groove, ensuring that the back seat can slide relative to the plug cover within the plug cover while preventing it from completely detaching from the plug cover.

[0018] 2. The press cover can move up and down relative to the rear seat and is inserted from the back of the plug cover to reach the press port;

[0019] 3. After the rear seat slides towards the back of the insert plate, the support spring supports the press cover to return to its original position, sealing it over the press port to ensure overall aesthetics; multiple sets of arrangement can distribute the support force at various positions of the press cover, avoiding excessive local support force that could cause tilting;

[0020] 4. The ratchet and ratchet strip are matched to achieve the initial positioning of the back seat, thereby overcoming the elastic force of the support spring on the back seat after the press cover is reset, and preventing the back seat from pushing up the plug body and plug cover under the push of the support spring, causing the plug body to be unable to fit against the wall. The support spring is used to reset the press cover, but it will also generate a pushing force on the back seat after reset. Therefore, the predetermined threshold is slightly greater than the elastic force of the support spring to overcome the pushing force of the support spring on the back seat, which would cause the back seat to push out towards the back of the plug body. Attached Figure Description

[0021] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0023] Figure 3 This is a first-person perspective three-dimensional structural diagram of the insert plate body of this utility model in the event of an explosion.

[0024] Figure 4 This is a two-dimensional structural diagram of the exploded insert body of this utility model from a second perspective.

[0025] Figure 5 This is a third-person perspective three-dimensional structural diagram of the insert plate body of this utility model in the form of an explosion.

[0026] Figure 6 This is a four-dimensional structural diagram of the exploded insert body of this utility model from a fourth perspective.

[0027] Figure 7 This is a three-dimensional cross-sectional view of the extension plug of this utility model.

[0028] Figure 8 This is a cross-sectional three-dimensional structural diagram of the expansion plug of this utility model in the extended state when pressed by the cover.

[0029] Figure 9 This is a cross-sectional three-dimensional structural diagram of the press cover in the reset state of this utility model.

[0030] Figure 10 This is a first cross-sectional three-dimensional structural diagram of the expansion plug of this utility model.

[0031] Figure 11 This is a schematic diagram of the second cross-sectional three-dimensional structure of the expansion plug of this utility model.

[0032] Figure 12 This is a first exploded three-dimensional structural diagram of the expansion plug of this utility model.

[0033] Figure 13 This is a second exploded three-dimensional structural diagram of the expansion plug of this utility model.

[0034] Figure 14 This utility model Figure 7 A magnified three-dimensional structural diagram of part A.

[0035] Figure 15 This utility model Figure 8 A magnified three-dimensional structural diagram of part B.

[0036] Figure 16 This utility model Figure 9 A magnified three-dimensional structural diagram of part C.

[0037] Figure 17 This utility model Figure 4A magnified three-dimensional structural diagram of part D.

[0038] The labels in the diagram mean: 10-Plug body; 11-Extension socket; 12-Plug cover; 121-Pressing port; 122-Guide groove; 123-Anti-detachment sidewall; 124-Side guard; 125-Ratchet; 13-Telescopic slide; 14-Fixing hole / hanging hole; 15-Adhesive surface; 20-Extension plug; 21-Pin; 22-Rear seat; 221-Anti-detachment guide; 222-Anti-detachment hook; 223-Spring post; 224-Ratchet; 23-Pressing cover; 231-Side guard; 232-Spring cylinder; 24-Support spring. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] refer to Figures 1 to 17 ,like Figures 1 to 17 An expansion plug is shown, comprising a plug body 10, the plug body 10 having a plurality of expansion slots 11 on its front and / or sides; a plug cover 12 extending outward and connected to the plug body 10 on the side of the plug body 10, the plug body 10 having a telescopic sliding port 13 corresponding to the plug cover 12 and connected to the inner cavity of the plug cover 12; and an expansion plug 20 having pins 21 on its back, the expansion plug 20 being located inside the plug cover 12 and slidingly adapted to the telescopic sliding port 13 to slide in the insertion and removal direction of the pins 21; the pins 21 being connected to the expansion slots 11 inside the plug body 10 via a wire (a flexible wire, not shown in the figure) through the telescopic sliding port 13; the plug cover 12 being open corresponding to the back of the plug body 10, and having a corresponding front of the plug body 10. Pressing port 121; The expansion plug 20 includes a rear seat 22 located on the back of the plug cover 12 and sliding along the insertion / removal direction of the pins 21, and a pressing cover 23 located inside the pressing port 121 and sliding along the insertion / removal direction of the pins 21. The pins 21 are mounted on the rear seat 22. The rear seat 22 is slidably adapted to the telescopic sliding port 13 (this is prior art, and the specific sliding structure is not described in detail here). The side wall of the rear seat 22 is provided with an anti-disengagement guide 221 extending toward the pressing cover 23. The end of the anti-disengagement guide 221 is provided with an anti-disengagement hook 222. The inner wall of the plug cover 12 is provided with a guide groove 121 for guiding the anti-disengagement hook 222 to slide along the insertion / removal direction of the pins 21. One end of the guide groove 122 corresponding to the back of the plug cover 12 is provided with an anti-disengagement side wall 123 for preventing the anti-disengagement hook 222 from coming off.

[0041] In the above structure, by opening a pressing port 121 on the plug cover 12, pressure can be applied to the pressing cover 23 through the pressing port 121 during installation, causing it to push the rear seat 22 towards the back of the socket body 10 to form a supporting force, thereby allowing the plug pin 21 to be stably inserted into the socket. Then the socket body 10 is pressed against the wall, and the rear seat 22 slides and adapts to the telescopic sliding port 13 for adaptive compensation adjustment, realizing that the extension plug 20 is effectively fitted to the socket while the socket body 10 is also effectively fitted to the wall. The anti-disengagement hook 222 of the anti-disengagement guide 221 is adapted to the anti-disengagement side wall 123 of the guide groove 122, ensuring that the rear seat 22 can slide relative to the plug cover 12 within the plug cover 12 while preventing it from completely disengaging from the plug cover 12.

[0042] In this embodiment, the inner side of the side of the rear seat 22 facing the pressing cover 23 is provided with several baffles 124, and the outer edge of the end of the pressing cover 23 facing the rear seat 22 is provided with a baffle 231. When the pressing cover 23 is dislodged in the direction of the front of the insert plate body 10, the baffle 231 abuts against the baffles 124 to prevent it from dislodging.

[0043] In the above structure, the press cover 23 can move up and down relative to the rear seat 22 and is inserted from the back of the plug cover 12 to reach the press port 121.

[0044] In this embodiment, a support spring 24 is provided between the pressing cover 23 and the rear seat 22 to support the pressing cover 23 so that it moves away from the rear seat 22 along the insertion and removal direction of the pin 21.

[0045] In the above structure, after the rear seat 22 slides towards the back of the insert plate 10, the support spring 24 supports the press cover 23 to return to its original position, so that it is sealed on the press port 121 to ensure the overall aesthetics.

[0046] In this embodiment, the support springs 24 are in multiple sets, arranged in multiple points around the pin 21 on the projection surface between the press cover 23 and the back seat 22.

[0047] In the above structure, the multiple arrangements can distribute the support force at each position of the pressing cover 23, avoiding excessive local support force that could cause tilting.

[0048] In this embodiment, the side of the pressing cover 23 facing the rear seat 22 is provided with a spring cylinder 232, and the side of the rear seat 22 facing the pressing cover 23 is provided with a spring post 223. One end of the support spring 24 is inserted into the spring cylinder 232, and the other end is sleeved on the outside of the spring post 223.

[0049] In the above structure, the two ends of the support spring 24 are fixed to the spring column 223 by the spring sleeve 232, and the cylindricity of the support spring 24 is constrained by the two during compression.

[0050] In this embodiment, the anti-disengagement hook 222 is provided with ratchet teeth 224 arranged at intervals along the insertion and removal direction of the pin 21 on the side facing the guide groove 122; the guide groove 122 is provided with a ratchet bar 125 arranged along the insertion and removal direction of the pin 21 on the side facing the anti-disengagement hook 222; when the rear seat 22 slides relative to the plug cover 12 along the insertion and removal direction of the pin 21, it achieves positioning by the ratchet teeth 224 engaging with the ratchet bar 125.

[0051] In the above structure, the ratchet 224 and the ratchet bar 125 are adapted to achieve the initial positioning of the rear seat 22, thereby overcoming the elastic force of the support spring 24 on the rear seat 22 after the press cover 23 is reset, and preventing the rear seat 22 from pushing up the plug body 10 and the plug cover 12 under the push of the support spring 24, causing the plug body 10 to be unable to fit against the wall.

[0052] In this embodiment, the anti-detachment guide 221 is an elastic arm. When the rear seat 22 is subjected to the force of the insertion and extraction direction of the pin 21 and reaches a predetermined threshold, the ratchet 224 and the ratchet 125 disengage from each other. When the force of the rear seat 22 subjected to the insertion and extraction direction of the pin 21 is less than the predetermined threshold or disappears, the ratchet 224 and the ratchet 125 re-engage and reposition.

[0053] In the above structure, the support spring 24 is used to reset the pressing cover 23, but it will also generate a thrust on the back seat 22 after reset. Therefore, the predetermined threshold is slightly greater than the elastic force of the support spring 24 to overcome the thrust of the support spring 24 on the back seat 22, causing the back seat 22 to push out toward the back of the insert plate body 10.

[0054] In this embodiment, there are multiple sets of anti-detachment guides 221 and their matching guide grooves 122; the anti-detachment guides 221 are located on both sides of the rear seat 22, and the guide grooves 122 are located on both sides of the inner wall of the plug cover 12.

[0055] In the above structure, the multiple sets of anti-detachment guides 221 and guide grooves 122 can improve the overall stability.

[0056] In this embodiment, the back of the insert plate body 10 is provided with fixing holes / hanging holes 14.

[0057] The above structure facilitates fixing to the wall with screws.

[0058] In this embodiment, the back of the insert plate 10 is provided with an adhesive surface 15.

[0059] The above structure facilitates fixing to the wall surface using nail-free adhesive.

[0060] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An expansion socket, comprising a socket body, wherein the socket body has a plurality of expansion slots on its front and / or sides; the side of the socket body has an extended plug cover that connects to the socket body; the socket body has a telescopic sliding opening corresponding to the plug cover and connected to the inner cavity of the plug cover; further comprising an expansion plug with pins on its back, the expansion plug being located inside the plug cover and slidingly adapted to the telescopic sliding opening to slide in the pin insertion / removal direction; the pins are connected to the expansion slots inside the socket body via wires through the telescopic sliding opening, characterized in that: The plug cover is open at the back of the plug body and has a pressing port at the front of the plug body. The extension plug includes a rear seat that slides along the insertion / removal direction of the plug pins at the back of the plug cover and a pressing cover that slides along the insertion / removal direction of the plug pins inside the pressing port. The plug pins are mounted on the rear seat, and the rear seat is slidably adapted to the telescopic sliding port. The side wall of the rear seat is provided with an anti-disengagement guide extending toward the pressing cover. The end of the anti-disengagement guide is provided with an anti-disengagement hook. The inner wall of the plug cover is provided with a guide groove for guiding the anti-disengagement hook to slide along the insertion / removal direction of the plug pins. One end of the guide groove corresponding to the back of the plug cover is provided with an anti-disengagement side wall for preventing the anti-disengagement hook from disengaging.

2. An expansion board according to claim 1, characterized in that: The inner side of the side of the rear seat facing the press cover is provided with several baffles, and the outer edge of the end of the press cover facing the rear seat is provided with a baffle. When the press cover is dislodged in the direction of the front of the insert plate, it is prevented from dislodging by the baffle and the baffle.

3. An expansion board according to claim 2, characterized in that: A support spring is provided between the pressing cover and the rear seat to support the pressing cover and move it away from the rear seat in the direction of insertion and removal of the pins.

4. An expansion board according to claim 3, characterized in that: The support springs are in multiple sets, arranged at multiple points around the pins on the projection surface between the press cover and the rear seat.

5. An expansion board according to claim 3 or 4, characterized in that: The pressing cover has a spring cylinder on the side facing the rear seat, and the rear seat has a spring post on the side facing the pressing cover. One end of the support spring is inserted into the spring cylinder, and the other end is sleeved on the outside of the spring post.

6. An expansion board according to claim 1, characterized in that: The anti-disengagement hook has ratchet teeth arranged at intervals along the insertion and removal direction of the plug on the side facing the guide groove; the guide groove has a ratchet bar arranged along the insertion and removal direction of the plug on the side facing the anti-disengagement hook; when the rear seat slides relative to the plug cover along the insertion and removal direction of the plug, it achieves positioning by the ratchet teeth and the ratchet bar engaging.

7. An expansion board according to claim 6, characterized in that: The anti-detachment guide is an elastic arm that disengages the ratchet and the ratchet bar when the rear seat is subjected to a force in the direction of insertion and removal of the pins and reaches a predetermined threshold. When the force in the rear seat is subjected to a force in the direction of insertion and removal of the pins is less than the predetermined threshold or disappears, the ratchet and the ratchet bar re-engage and reposition themselves.

8. An expansion board according to claim 6 or 7, characterized in that: The anti-detachment guide and the matching guide groove are in multiple sets; the anti-detachment guide is located on both sides of the rear seat, and the guide groove is located on both sides of the inner wall of the plug cover.

9. An expansion board according to claim 1, characterized in that: The back of the insert plate is provided with fixing holes / hanging holes.

10. An expansion board according to claim 1, characterized in that: The back of the insert plate has an adhesive surface.

Images