Anti-dragging stable safety power strip

Abstract

The invention relates to the technical field of power strips, and particularly discloses an anti-dragging stable safety power strip which comprises an outer shell, an upper cover plate and a conductive contact piece, a mounting structure aligned with the conductive contact piece is arranged on the upper cover plate, an anti-dragging mechanism is arranged in the mounting structure, and the anti-dragging mechanism comprises a hollow block. The upper surface and the lower surface of the hollow block are provided with pin holes aligned with each other, two elastic pieces are symmetrically connected to the positions, on the two sides of the pin holes, of the top wall of the hollow block, the lower end of each elastic piece is connected with an extrusion wheel rotating in one direction, a rubber anti-skid layer is arranged on the outer circle face of each extrusion wheel, and extension strips are horizontally arranged at the side ends of the upper portions of the elastic pieces. The upper end of the hollow block is provided with an unlocking assembly which moves downwards to press the extension strip so that the lower ends of the two elastic pieces can be unfolded. The anti-dragging stable safety power strip disclosed by the invention has better anti-dragging performance, and the plugging mode between the plug and the power strip is the same as that of an existing power strip, so that the power strip is convenient to use, simple in overall appearance and better in aesthetic degree.

Description

Technical Field

[0001] The present invention relates to the technical field of socket strips, and in particular discloses an anti-pull stable safety socket strip. Background Art

[0002] As an electrical device that extends power sockets, socket strips are widely used in daily life and work. During use, appliance plugs typically securely connect via a transition or interference fit between the prongs and sockets. However, inadvertent tugging on the cord can cause the plug to slip out of the strip, disconnecting the appliance and causing it to stop functioning. This inadvertent tugging on the cord can even cause poor contact between the plug and the copper sheet inside the strip, resulting in sparks and potential safety hazards such as electrical leakage and fire.

[0003] The utility model patent application number 201921129300.4 discloses a plug-fixing socket strip, comprising a socket strip body with a plurality of sockets for mating with plugs, and a plurality of baffles. The baffles are located above the sockets and connected to the socket strip body by elastic members. The baffles have wire fixing holes running through them for passing the wires of the plugs fixed thereto. The baffles have connecting grooves connecting the wire fixing holes and the edges of the baffles. The elastic members extend to insert the plugs into the sockets, and contract to pull the baffles to compress the plugs. The socket strip disclosed in this utility model patent utilizes springs and baffles to stably press the plugs against the surface of the socket strip during use, thereby preventing the plugs from slipping out of the sockets and having a certain anti-pull effect. However, this type of socket strip has some shortcomings in actual use: First, when inserting the plug pins, the baffle must be pulled up to a certain height, and then the plug must be stuck between the baffle and the socket strip before the plug can be inserted into the socket, which makes the plug insertion operation very cumbersome and inconvenient to use; second, because the baffle is connected to the socket strip surface through an elastic member, it is still easy to pull the plug out of the socket and get stuck between the baffle and the socket strip surface when subjected to a large external pulling force; third, the appearance of the entire socket strip is not good, resulting in poor market competitiveness. Therefore, based on the fact that traditional socket strips do not have anti-pull performance and the above-mentioned technical deficiencies of existing socket strips with fixed plugs, this application proposes a newly designed anti-pull stable safety socket strip. Summary of the Invention

[0004] The present invention aims to provide a stable and anti-pull safety socket, which can facilitate the plugging and unplugging of plugs while ensuring good anti-pull performance and has good aesthetics.

[0005] The present invention is achieved through the following technical solutions: A drag-resistant and stable safety socket strip comprises an outer shell, an upper cover, and conductive contacts. The upper cover is provided with a mounting structure aligned with the conductive contacts. The mounting structure is provided with an anti-drag mechanism. The anti-drag mechanism comprises a hollow block, wherein the upper and lower surfaces of the hollow block are provided with mutually aligned pin holes, and two elastic sheets are symmetrically connected to the top wall of the hollow block located on both sides of the pin holes, and the two elastic sheets are arranged in an inverted figure eight shape. The lower end of each elastic sheet is connected to a unidirectionally rotating extrusion wheel, and the wheel gap between the two extrusion wheels is set smaller than the thickness of the pins on the plug. The outer circumferential surface of the extrusion wheel is provided with a rubber anti-slip layer. An extension bar is horizontally provided at the upper side end of the elastic sheet, and an unlocking component is provided at the upper end of the hollow block for pressing the extension bar downward to unfold the lower ends of the two elastic sheets.

[0006] During use of the anti-pull and stable safety socket strip disclosed in the present invention, a suitable plug is selected and inserted along the pin hole on the upper surface of the hollow block. When the pins on the plug pass through the pin hole and enter between the two elastic sheets and interact with the extrusion wheel, the two elastic sheets will open under the action of downward pressure and the extrusion wheel will start to rotate, thereby changing the sliding friction into rolling friction, so that the pins on the plug can pass through the two extrusion wheels smoothly with low resistance, and finally extend into the bottom of the outer shell and contact the conductive contact sheet.

[0007] When the plug is pulled by an external force, it moves upward rapidly. However, due to the one-way rotation of the extrusion wheel, the extrusion wheel does not rotate, causing sliding friction between the rubber anti-slip layer and the prongs, resulting in significant resistance to the plug's upward movement. Furthermore, because the two elastic plates are arranged in an inverted figure-eight shape, the upward force applied to the extrusion wheel causes them to bend upward. During this upward deformation, the distance between the two elastic plates further decreases, further increasing the friction exerted by the rubber anti-slip layers on the prongs. This effectively prevents the plug from moving upward and provides excellent anti-pull performance.

[0008] Finally, when the plug needs to be unplugged, the user can press the unlocking component to act on the extension bar, causing the lower ends of the two elastic sheets to unfold, releasing the force applied to the pins by the two extrusion wheels, thereby eliminating the friction between the rubber anti-slip layer and the pins, and then the plug can be unplugged quickly and without resistance.

[0009] As a further arrangement of the above scheme, the mounting structure is a stepped mounting opening opened on the upper cover plate, the hollow block is a hollow rectangular block extending into the outer shell through the stepped mounting opening, and the upper ends of the side walls of the hollow rectangular block extend outwardly with bosses, and the bosses are detachably connected to the stepped mounting opening by screws.

[0010] The above is the first specific connection method between the mounting structure and the anti-pull mechanism in the present invention. The protrusion is directly and detachably connected to the stepped mounting opening by screws. When the anti-pull mechanism is damaged and deformed internally and has no anti-pull performance, the corresponding anti-pull mechanism can be replaced separately so that it can be used normally.

[0011] As a further arrangement of the above scheme, the mounting structure is a circular groove opened on the upper cover plate, the hollow block is a hollow cylindrical block and is adapted to the circular groove, a connecting column rotatably connected to the hollow cylindrical block is provided at the center of the bottom wall of the circular groove, and a torsion spring is sleeved on the connecting column, the two ends of which are respectively connected to the circular groove and the hollow cylindrical block.

[0012] As a further configuration of the above solution, a through hole is provided on the bottom wall of the circular groove, and the through hole is rotationally staggered with the pin hole provided on the hollow cylindrical block.

[0013] The above is a second specific connection method between the mounting structure and the anti-pull mechanism in the present invention. By configuring the hollow block into a cylindrical shape and rotatably connecting it to the circular groove, combined with a torsion spring and a through-hole design with a rotational offset, the through-hole is sealed when the plug is not inserted due to the rotational offset between the through-hole and the pin hole, thus providing a good dustproof effect and improving the protection of the entire socket strip from accidental electric shock. Once the plug is inserted into the anti-pull mechanism, it can be rotated a certain angle to align the through-hole with the pin hole. The plug can then be smoothly inserted into the bottom of the outer shell and connected to the conductive contact, thus achieving circuit conduction.

[0014] As a further feature of the above solution, the lower ends of the two elastic sheets are each provided with a lug plate, away from the other elastic sheet. The lug plates are provided with mounting holes, each containing a miniature one-way bearing. The two ends of the extrusion wheel are connected to the miniature one-way bearings on either side. This is one specific connection method between the extrusion wheel and the elastic sheet, and combined with the miniature one-way bearings, the extrusion wheel has a good one-way rotation effect.

[0015] As a further development of the above solution, the unlocking assembly includes a pressure lever extending through the upper surface of the hollow block. The upper end of the pressure lever is connected to a pressing member, and the lower end is connected to an inclined pressure strip, whose ends interact with the extension strip. A spring is also connected between the inclined pressure strip and the bottom wall of the hollow block. This is one specific design solution for the unlocking assembly. By applying downward pressure on the pressure lever, the inclined pressure strip moves downward. The interaction between the ends of the inclined pressure strip and the extension strip on the elastic strip causes the lower ends of the two elastic strips to unfold, releasing the clamping force of the two extrusion wheels on the pins, thereby facilitating quick and frictionless removal of the plug.

[0016] As a further configuration of the above solution, the hollow block has two or three pin holes, with two pin holes matching a two-pin plug and three pin holes matching a three-pin plug. The specific number of pin holes is selected based on actual conditions, and a combination of two pin holes and three pin holes can also be used to ensure that the power strip is compatible with both two-pin and three-pin plugs.

[0017] As a further feature of the above solution, two elastic sheets, a squeeze wheel, and a rubber anti-slip layer are provided on both sides of each or one of the pin holes. The specific selection depends on the type of plug. When the pin hole is used for a two-prong plug, it is preferred to provide the corresponding elastic sheet, squeeze wheel, and rubber anti-slip layer on both pin holes. When the pin hole is used for a three-prong plug, it is preferred to provide the corresponding elastic sheet, squeeze wheel, and rubber anti-slip layer on only one pin hole, thereby simplifying the internal structure of the anti-pull mechanism.

[0018] As a further configuration of the above solution, the upper cover plate is provided with multiple mounting structures, and the multiple mounting structures are arranged at equal intervals. The design of the multiple mounting structures and multiple anti-pull mechanisms enables the socket strip to be used for connecting multiple electrical plugs at the same time.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The anti-pull stable safety socket strip disclosed in the present invention has a built-in anti-pull mechanism, which not only makes it have good anti-pull performance, but also the plugging method between the plug and the socket strip is the same as that of the existing socket strip, making it easy to use, and the overall appearance is simple and has good aesthetics.

[0020] The anti-pull mechanism of the present invention is designed with two elastic sheets, an extrusion wheel and a rubber anti-slip layer. During the insertion process of the pins on the plug, the extrusion wheel can rotate to allow the pins to pass smoothly with low resistance. When the plug is pulled and dragged to move in the opposite direction, the extrusion wheel cannot rotate, so the rolling friction is converted into sliding friction, and the resistance increases. In addition, the upward bending deformation of the elastic sheets on both sides reduces the distance between the two extrusion wheels, and the extrusion friction force is further increased, which can effectively prevent the plug from being pulled out, thereby having excellent anti-pull performance.

[0021] The anti-pull mechanism and the upper cover plate in the present invention can be detachably connected by screws, thereby facilitating replacement. In addition, a rotating setting can be adopted so that the pin holes of the extension strip are blocked and sealed when not in use, thereby having better dustproof effect and anti-accidental electric shock effect, and higher safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the three-dimensional structure of Example 1 of the present invention; Figure 2 This is a schematic diagram of the three-dimensional assembly structure of Example 1 of the present invention; Figure 3 Schematic diagram of the internal three-dimensional structure of the anti-pull mechanism in Example 1 of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the anti-pull mechanism after disassembly in Example 1 of the present invention; Figure 5 This is a schematic diagram of the three-dimensional exploded structure of the elastic sheet, miniature one-way bearing, extrusion wheel, etc. in the present invention; Figure 6 Schematic diagram of the three-dimensional structure of embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the three-dimensional assembly structure of Example 2 of the present invention; Figure 8 Schematic diagram of the internal three-dimensional structure of the anti-pull mechanism in Example 2 of the present invention; Figure 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Figures 1 to 9 , and describes the application in detail with reference to embodiments. Example 1

[0026] Example 1 discloses a drag-resistant and stable safety plug strip. Figure 1-5The main components of the device include an outer shell 1, an upper cover 2, and conductive contacts 3. The outer shell 1 and upper cover 2 are injection molded, and the upper cover 2 is sealed to the top opening of the outer shell 1 via screws at four corners. Multiple sets of conductive contacts 3 are fixedly mounted at equal intervals on the bottom wall of the inner cavity of the outer shell 1. Electrical wires 4 connect the circuit and lead out of the outer shell 1.

[0027] A plurality of stepped mounting openings 201 are evenly spaced on the upper surface of the upper cover plate 2, and each stepped mounting opening 201 is aligned with a group of conductive contacts 3 up and down, and an anti-pull mechanism 5 is detachably connected to each stepped mounting opening 201 via connecting screws.

[0028] The anti-pull mechanism 5 in this embodiment 1 is adapted to a two-pin plug 600 and includes a hollow rectangular block 501 that can pass through the stepped mounting opening 201 and extend into the inner cavity of the outer shell 1. A boss 502 extends outward from the upper end of the side walls of the hollow rectangular block 501, and the boss 502 is adapted to the stepped mounting opening 201. Then, the boss 502 and the stepped mounting opening 201 are connected by connecting screws.

[0029] Two aligned pin holes 503 are defined on the upper and lower surfaces of the hollow rectangular block 501. These holes are slightly larger than the pins on the two-prong plug 600, facilitating insertion of the plug. Curved elastic plates 504 are fixedly attached to the top wall of the hollow rectangular block 501 on either side of each pin hole 503. These two elastic plates 504 are arranged in an inverted "eight" shape, mirror-symmetrically with the pin hole 503 as their axis of symmetry. Each elastic plate 504 is provided with a lug plate 505 on either side of its lower end, away from the other elastic plate 504. Mounting holes 5051 are defined in these lug plates 505, each containing a miniature one-way bearing 506. An extrusion wheel 507 is mounted between the two opposing miniature one-way bearings 506, and a rubber anti-slip layer 508 is applied to its outer circumference. The wheel gap between the two mirror-symmetrically arranged squeezing wheels 507 is smaller than the thickness of the pins on the two-pin plug 600, so that the pins can be clamped by the two rubber anti-slip layers 508 after passing through the two squeezing wheels 507.

[0030] Furthermore, an unlocking assembly is provided on the hollow rectangular block 501 to drive the lower ends of the two elastic pieces 504 to open. This unlocking assembly includes a pressing bar 509 positioned on either side of the two pin holes 503, and a receiving bar slot 510 is provided on the upper surface of the hollow rectangular block 501 to accommodate the pressing bar 509. At each end of the pressing bar 509 are a pressing rod 511 extending into the interior of the hollow rectangular block 501. A beveled pressing bar 512 is connected to the lower end of each pressing rod 511, and a spring 513 is connected between the beveled pressing bar 512 and the top wall of the hollow rectangular block 501. Finally, an extension bar 514 extends horizontally from the upper side of each elastic piece 504 and interacts with one end of the beveled pressing bar 512.

[0031] During use of the anti-pull, stable safety power strip disclosed in Example 1, the two prongs of the two-prong plug 600 are aligned with the two prong holes 503 on the upper surface of the hollow rectangular block 501, and the two-prong plug 600 is then pressed down firmly. As the two-prong plug 600 moves downward, its two prongs pass through the gaps between the corresponding two extrusion wheels 507. The miniature one-way bearings 506 allow the extrusion wheels 507 to rotate, and the elastic sheet 504 deforms, allowing the prongs to smoothly pass through the gaps. Then, they pass through the prong holes 503 on the lower surface of the hollow rectangular block 501 and ultimately connect with the conductive contacts 3 on the bottom wall of the outer shell 1, thereby completing the circuit.

[0032] During stable connection between the two-prong plug 600 and the power strip, if the guide connected to the two-prong plug 600 is accidentally pulled, the two-prong plug 600 may move upward. At this time, the miniature one-way bearing 506 prevents the extrusion wheels 507 from rotating in the opposite direction. Therefore, the elastic force of the two extrusion wheels 507, combined with the action of the rubber anti-slip layer 508, can exert a significant friction force on the prongs, thereby preventing the prongs from moving upward. Furthermore, when the two-prong plug 600 is forcibly pulled upward, the vertical upward force causes the elastic sheets 504 on both sides to bend upward. Combined with the inverted "eight" shape of the two elastic sheets 504, this reduces the distance between the two extrusion wheels 507, further increasing the extrusion force applied to the prongs by the two extrusion wheels 507. In other words, the extrusion force applied by the two extrusion wheels 507 increases as the upward force of the two-prong plug 600 increases, providing the two-prong plug 600 with greater connection stability and better anti-pull performance.

[0033] Finally, when the two-prong plug 600 needs to be removed, the user first firmly presses the pressing bar 509, causing the inclined pressing bar 512 to move downward a certain distance. As the inclined pressing bar 512 moves downward, its two ends exert downward pressure on the extension bar 514, causing the two elastic pieces 504 to bend downward. Combined with the shape of the elastic pieces 504, this increases the gap between the two extrusion wheels 507, thereby releasing the squeezing force applied by the squeezing wheels 507 to the pins. After the squeezing force applied by the squeezing wheels 507 to the pins is released, the user can easily remove the two-prong plug 600 without any resistance. Example 2

[0034] Example 2 discloses another anti-pull stable safety socket, see the attached Figure 6-9 The main components include an outer shell 1, an upper cover 2, and conductive contacts (not shown). The outer shell 1 and upper cover 2 are injection molded, and the upper cover 2 is sealed to the top opening of the outer shell 1 via screws at four corners. Multiple sets of conductive contacts are fixedly mounted at equal intervals on the bottom wall of the inner cavity of the outer shell 1. Electrical wires 4 are then connected and led out of the outer shell 1.

[0035] A plurality of circular grooves 202 are evenly spaced on the upper surface of the upper cover 2, and each circular groove 202 is aligned vertically with a set of conductive contacts on the bottom wall of the outer shell 1. An upwardly protruding connecting post 203 is provided at the center of the bottom wall of the circular groove 202, and a torsion spring 204 is sleeved around the connecting post 203. The anti-pull mechanism 5 is then connected to the connecting post 203 and the torsion spring 204, which rotates in the circular groove 202.

[0036] The anti-pull mechanism 5 in this embodiment 2 is adapted to the three-pin plug 700, and includes a hollow cylindrical block 515 adapted to the circular groove 202. The bottom wall of the hollow cylindrical block 515 is provided with an upper convex connecting portion 516 that acts on the connecting column 203 and the torsion spring 204. Then, three pin holes 503 aligned vertically are provided on the upper and lower surfaces of the hollow cylindrical block 515. The position arrangement of the three pin holes 503 is adapted to the three-pin plug 700. At the same time, the size of the pin holes 503 is slightly larger than the pin size setting on the three-pin plug 700, thereby facilitating the insertion of the three-pin plug 700.

[0037] Because the wires and pins of the three-pin plug 700 are perpendicular to each other, providing a certain degree of pull-resistant performance, this embodiment 2 only features curved elastic pieces 504 fixedly attached to the top walls of the hollow cylindrical blocks 515 on either side of one pin hole 503. The two elastic pieces 504 are arranged in an inverted "eight" shape, mirror-symmetrically with respect to the pin hole 503. Each elastic piece 504 has a lug plate 505 on either side of its lower end, away from the other elastic piece 504. Mounting holes 5051 are defined in the lug plates 505, each containing a miniature one-way bearing 506. An extrusion wheel 507 is installed between two opposing miniature one-way bearings 506, and a rubber anti-slip layer 508 is provided on the outer circumferential surface of the extrusion wheel 507. The wheel gap between the two mirror-symmetrically arranged extrusion wheels 507 is slightly smaller than the thickness of the pins on the three-pin plug 700, so that the three-pin plug 700 can be clamped by the two rubber anti-slip layers 508 after passing through the two extrusion wheels 507.

[0038] The hollow cylindrical block 515 is also equipped with an unlocking assembly that drives the lower ends of the two elastic pieces 504 to open. This unlocking assembly includes a pressing cap 517 positioned outside the pin hole 503. The lower end of the pressing cap 517 is connected to a pressing rod 511 that extends into the interior of the hollow cylindrical block 515. The lower ends of the pressing rods 511 are each connected to an inclined pressure strip 512. A spring 513 is connected between the inclined pressure strip 512 and the top wall of the hollow cylindrical block 515. Finally, an extension bar 514 extends horizontally from the upper side of each elastic piece 504 and interacts with one end of the inclined pressure strip 512.

[0039] Finally, in this second embodiment, a through hole 205 for the three pins is formed on the bottom wall of the circular groove 202. The arrangement of the three pin holes 205 is the same as that of the three pin holes 503, but the three pin holes 205 are arranged at a 60° or 90° rotational offset from the three pin holes 503. When the anti-pull mechanism 5 is not subjected to external forces, the action of the connecting column 203 and the torsion spring 204 causes the pin holes 503 on the anti-pull mechanism 5 to rotate out of alignment with the through holes 205 of the three pins, thereby sealing the pin holes 503 at the lower end of the anti-pull mechanism 5 against the bottom wall of the circular groove 202. This provides both dustproofing and enhanced safety, preventing children from passing conductive objects directly through the pin holes 503 on the anti-pull mechanism 5 and causing electric shock accidents.

[0040] During use, the working principle of the anti-pull mechanism 5 of this embodiment 2 is the same as that of embodiment 1. After the three-pin plug 700 is inserted into the anti-pull mechanism 5, it is necessary to first rotate the three-pin plug 700 as a whole by a certain angle so that the pin hole 503 is aligned with the three-pin through hole 205, and then press the three-pin plug 700 again to connect the circuit.

[0041] When unplugging the three-pin plug 700, the unlocking assembly is also pressed first to release the squeezing force of the squeezing wheel 507 on the pin, and then the three-pin plug 700 is directly unplugged. After the three-pin plug 700 is unplugged, the anti-pull mechanism 5 can be rotated and reset under the action of the torsion spring 204, so that the pin hole 503 and the three-pin through hole 205 are rotated and misaligned, so that it has dust-proof and electric shock-proof functions.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drag-resistant and stable safety socket strip, comprising an outer shell, an upper cover, and conductive contacts, characterized in that: The upper cover is provided with a mounting structure aligned with the conductive contact piece, and an anti-pull mechanism is provided in the mounting structure, and the anti-pull mechanism includes a hollow block, and the upper and lower surfaces of the hollow block are provided with mutually aligned pin holes, and two elastic sheets are symmetrically connected to the top wall of the hollow block located on both sides of the pin hole, and the two elastic sheets are arranged in an inverted eight shape, and the lower end of each elastic sheet is connected to a unidirectional rotating extrusion wheel, and the wheel gap between the two extrusion wheels is smaller than the thickness of the pins on the plug, and a rubber anti-slip layer is provided on the outer circumference of the extrusion wheel; An extension bar is horizontally provided at the upper side end of the elastic sheet, and an unlocking component is provided at the upper end of the hollow block for pressing the extension bar downward to unfold the lower ends of the two elastic sheets.

2. The anti-pull stable safety socket according to claim 1, characterized in that: The mounting structure is a stepped mounting opening on the upper cover plate, and the hollow block is a hollow rectangular block extending into the outer shell through the stepped mounting opening, and bosses extend outward from the upper ends of the side walls of the hollow rectangular block. The bosses are detachably connected to the stepped mounting opening by screws.

3. The anti-pull stable safety socket according to claim 1, characterized in that: The mounting structure is a circular groove opened on the upper cover plate, the hollow block is a hollow cylindrical block and is adapted to the circular groove, a connecting column rotatably connected to the hollow cylindrical block is provided at the center of the bottom wall of the circular groove, and a torsion spring is sleeved on the connecting column, the two ends of which are respectively connected to the circular groove and the hollow cylindrical block.

4. The anti-pull stable safety socket according to claim 3, characterized in that: A through hole is provided on the bottom wall of the circular groove, and the through hole and the pin hole provided on the hollow cylindrical block are arranged in a rotationally staggered manner.

5. The anti-pull stable safety socket according to claim 1, characterized in that: Both sides of the lower ends of the two elastic sheets are provided with lug plates away from the other elastic sheet, and mounting holes are opened on the lug plates. Miniature one-way bearings are provided in the mounting holes, and the two ends of the extrusion wheel are connected to the miniature one-way bearings on both sides.

6. The anti-pull stable safety socket according to claim 1, characterized in that: The unlocking assembly includes a pressing rod arranged through the upper surface of the hollow block, the upper end of the pressing rod is connected to a pressing piece, the lower end is connected to an inclined pressure strip whose two ends act on the extension strip, and a spring is connected between the inclined pressure strip and the bottom wall of the hollow block.

7. The anti-pull stable safety socket according to claim 1, characterized in that: The hollow block is provided with two or three pin holes, wherein the two pin holes are matched with a two-pin plug, and the three pin holes are matched with a three-pin plug.

8. The anti-pull stable safety socket according to claim 7, characterized in that: Two elastic sheets, an extrusion wheel and a rubber anti-slip layer are provided on both sides of each pin hole or one of the pin holes.

9. The anti-pull stable safety socket according to claim 1, characterized in that: There are multiple mounting structures on the upper cover plate, and the multiple mounting structures are arranged at equal intervals.

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