Plug

Abstract

The invention relates to a plug, and belongs to the technical field of power supplies. The plug comprises a plug shell, a plug pin support, a plug pin assembly and an overload protection module. The plug pin support is provided with a first pole jack and a second pole jack which are located on the two sides of the center line, the plug pin assembly comprises a first pole plug pin and a second pole plug pin, the first pole plug pin is fixed in the first pole jack, and the second pole plug pin is fixed in the second pole jack; the plug pin support and the overload protection module are both located in the plug shell, and the overload protection module is fixed to the first surface of the plug pin support and located between the first pole jack and the second pole jack. The overload protection module is provided with a first wiring structure and a second wiring structure, the first wiring structure is electrically connected with the first pole plug pin, the second wiring structure is used for being electrically connected with a first pole wire of a power line extending into the plug shell, and the second pole plug pin is used for being electrically connected with a second pole wire of the power line. According to the invention, the electricity utilization safety can be improved.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 202411427204.3 and the invention title "Plug" filed on October 12, 2024, the entire content of which is incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of power supplies, and particularly to a plug. Background Art

[0003] With the improvement of people's living standards, the demand for electricity is increasing day by day. As common power-taking devices at home, plugs and sockets have received more and more attention for their safety.

[0004] With the continuous enrichment of electrical equipment, users often inadvertently overload the socket during use. After the socket is overloaded, in severe cases, it may cause a fire, which is very dangerous. Therefore, researchers in the industry have been working hard to study power-taking devices with safer performance. Summary of the Invention

[0005] To solve the problems of the prior art, the present disclosure provides a plug. The technical solution is as follows:

[0006] According to the present disclosure, a plug is provided, including a plug housing, a pin support, a pin assembly, and an overload protection module;

[0007] The pin support has a first pole jack and a second pole jack on both sides of the center line. The pin assembly includes a first pole pin and a second pole pin. The first pole pin is fixed in the first pole jack, and the second pole pin is fixed in the second pole jack;

[0008] Both the pin support and the overload protection module are located in the plug housing. The overload protection module is fixed on the first surface of the pin support and is located between the first pole jack and the second pole jack;

[0009] The overload protection module has a first wiring structure and a second wiring structure. The first wiring structure is electrically connected to the first pole pin. The second wiring structure is used to be electrically connected to the first pole wire of the power cord extending into the plug housing. The second pole pin is used to be electrically connected to the second pole wire of the power cord.

[0010] Optionally, the pin assembly further includes a third pole pin. The pin support further has a third pole jack on the center line. The third pole pin is fixed in the third pole jack and extends out of the plug housing;

[0011] The overload protection module is located between the third-pole jack and the first position of the plug holder, and the first position is on the edge of the plug holder and on the center line of the plug holder.

[0012] Optionally, the plug holder has a power cord bracket at the first position for supporting the power cord extending into the plug housing;

[0013] The power cord bracket includes a horizontal portion and a vertical portion connected vertically. The horizontal portion is fixed at the first position of the plug holder, and the vertical portion has a power cord hole for the power cord to pass through.

[0014] Optionally, the top end of the vertical portion away from the horizontal portion has an opening communicating with the power cord hole, and the opening is for the power cord to be snapped into the power cord hole.

[0015] Optionally, the shape of the part of the opening away from the power cord hole is flared.

[0016] Optionally, both the second-pole plug and the third-pole plug have terminal ends extending out of the first surface of the plug holder. The second wiring structure has a terminal end. The terminal end of the second-pole plug is used to connect to the second-pole wire of the power cord, the terminal end of the third-pole plug is used to connect to the third-pole wire of the power cord, and the terminal end of the second wiring structure is used to connect to the second-pole wire of the power cord;

[0017] The terminal ends of the second-pole plug, the third-pole plug, and the terminal end of the second wiring structure are all cylindrical in shape, and their axial center lines are all perpendicular to the plug holder;

[0018] The terminal ends of the second-pole plug, the third-pole plug, and the terminal end of the second wiring structure all have openings penetrating the wall thickness of the cylinder, and the openings on the terminal end of the second-pole plug and the openings on the terminal end of the second wiring structure are all on a straight line parallel to the center line of the plug holder, and the opening on the terminal end of the third-pole plug is on a straight line perpendicular to the center line of the plug holder.

[0019] Optionally, both the first wiring structure and the second wiring structure extend out of the module housing of the overload protection module;

[0020] The part of the first wiring structure extending out of the module housing and the part of the second wiring structure extending out of the module housing are on the same side of the module housing as the first-pole plug.

[0021] Optionally, in a direction parallel to the center line of the plug bracket, the second wiring structure is farther from the power line than the first wiring structure.

[0022] Optionally, the first wiring structure has a wiring terminal protruding from the module housing of the overload protection module. The wiring terminal of the first wiring structure is connected to the first-pole plug pin. The second wiring structure has a wiring terminal protruding from the module housing, and the wiring terminal of the second wiring structure is used to connect to the first-pole wire of the power line;

[0023] In a direction perpendicular to the plug bracket, the wiring terminal of the first wiring structure is located between the wiring terminal of the second wiring structure and the first surface of the plug bracket.

[0024] Optionally, the overload protection module has a button, and the button is exposed at the top of the plug housing;

[0025] When the button is in the pressed state, the first wiring structure and the second wiring structure are in the connected state. When the button is in the popped-up state, the first wiring structure and the second wiring structure are in the disconnected state.

[0026] In the solution shown in the present disclosure, an overload protection module is integrated in the plug. When the current in the circuit where the plug is located is too large, the overload protection module disconnects the circuit where the plug is located to improve the electrical safety. Moreover, since the overload protection module is integrated in the plug, there is no need to arrange an overload protection module in the socket into which the plug is inserted, which can save the internal space of the socket and enable the socket to have more jacks arranged.

[0027] Moreover, the overload protection module is arranged in the originally existing idle area between the first-pole jack and the second-pole jack of the plug bracket, realizing the integration of the overload protection module in the plug with basically no change in the shape and size of the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 is a schematic structural diagram of a plug provided by an exemplary embodiment of the present disclosure;

[0030] Figure 2 is a schematic structural diagram of a plug bracket provided by an exemplary embodiment of the present disclosure;

[0031] Figure 3 Schematic diagram before the overload protection module provided by an exemplary embodiment of the present disclosure is installed on the first surface of the plug bracket;

[0032] Figure 4 Schematic diagram of the overload protection module and the plug assembly installed on the plug bracket provided by an exemplary embodiment of the present disclosure;

[0033] Figure 5 Schematic diagram of another perspective view of the overload protection module and the plug assembly installed on the plug bracket provided by an exemplary embodiment of the present disclosure;

[0034] Figure 6 Schematic diagrams before and after the formation of the second wiring structure provided by an exemplary embodiment of the present disclosure;

[0035] Figure 7 Exploded schematic diagram before the deformation sheet, the first wiring structure, and the second wiring structure provided by an exemplary embodiment of the present disclosure are installed in the module housing;

[0036] Figure 8 Schematic diagram after the deformation sheet, the first wiring structure, and the second wiring structure provided by an exemplary embodiment of the present disclosure are installed in the bottom case;

[0037] Figure 9 Schematic diagram of the structure of the overload protection module provided by an exemplary embodiment of the present disclosure;

[0038] Figure 10 Cross-sectional schematic diagram cut along the front-back direction after the deformation sheet, the first wiring structure, and the second wiring structure provided by an exemplary embodiment of the present disclosure are installed in the bottom case;

[0039] Figure 11 Schematic diagram of the structure of the deformation sheet provided by an exemplary embodiment of the present disclosure;

[0040] Figure 12 Cross-sectional schematic diagram cut along the front-back direction after the deformation sheet, the first wiring structure, the second wiring structure, and the push rod provided by an exemplary embodiment of the present disclosure are installed in the bottom case;

[0041] Figure 13 Schematic diagram of the reset mechanism provided by an exemplary embodiment of the present disclosure;

[0042] Figure 14 Schematic diagram of the structure of the push rod provided by an exemplary embodiment of the present disclosure;

[0043] Figure 15 Cross-sectional schematic diagram cut along the front-back direction before the push rod is installed in the bottom case provided by an exemplary embodiment of the present disclosure;

[0044] Figure 16 It is a schematic cross-sectional view taken along the front-back direction after the push rod is installed in the bottom case and cut, provided by an exemplary embodiment of the present disclosure;

[0045] Figure 17 It is a schematic structural view of the bottom of the bottom case provided by an exemplary embodiment of the present disclosure;

[0046] Figure 18 It is a schematic view of the elastic member and the plugging block in the bottom case provided by an exemplary embodiment of the present disclosure;

[0047] Figure 19 It is a schematic view before the deformed sheet and the first wiring structure after being fixed are installed in the bottom case provided by an exemplary embodiment of the present disclosure;

[0048] Figure 20 It is a schematic view after the deformed sheet and the first wiring structure after being fixed are installed in the bottom case provided by an exemplary embodiment of the present disclosure;

[0049] Figure 21 It is a schematic view before the second wiring structure is installed in the bottom case provided by an exemplary embodiment of the present disclosure;

[0050] Figure 22 It is a schematic view before the upper cover is assembled to the bottom case provided by an exemplary embodiment of the present disclosure;

[0051] Figure 23 It is a schematic view of the elastic member being installed into the bottom case from the installation opening at the bottom of the bottom case provided by an exemplary embodiment of the present disclosure;

[0052] Figure 24 It is a schematic view of the plugging block being inserted into the installation opening;

[0053] Figure 25 It is a schematic view of another type of plug housing provided by an exemplary embodiment of the present disclosure;

[0054] Figure 26 It is a schematic view of another type of overload protection module provided by an exemplary embodiment of the present disclosure.

[0055] Description of reference numerals

[0056] 100, plug housing; 101, bulging structure on the plug housing.

[0057] 200, pin bracket; 201, first pole jack; 202, second pole jack; 203, third pole jack; 204, power cord bracket; 205, sink; 206, fourth positioning structure.

[0058] 2041, power cord hole; 2042, opening on the power cord bracket.

[0059] 301. First pole plug; 302. Second pole plug; 303. Third pole plug.

[0060] 3011. Wiring terminal of the first pole plug; 3021. Wiring terminal of the second pole plug; 3031. Wiring terminal of the third pole plug.

[0061] 400. Overload protection module; 401. Button.

[0062] 1. First wiring structure; 11. Wiring terminal of the first wiring structure; 12. Connecting piece of the first wiring structure; 13. Transition piece of the first wiring structure.

[0063] 2. Second wiring structure; 21. Wiring terminal of the second wiring structure; 22. Connecting piece of the second wiring structure; 23. Transition piece of the second wiring structure.

[0064] 211. Opening on the second wiring structure; 212. Bayonet on the second wiring structure; 213. Protrusion structure on the second wiring structure; 231. Card slot on the second wiring structure.

[0065] 3. Module housing; 31. Bottom case; 32. Upper cover; 33. Sleeve.

[0066] 311. First side wall; 312. Second side wall; 313. Third card slot; 314. Channel; 315. Installation opening; 316. Annular rib; 317. First positioning structure; 318. Third positioning structure; 319. Fourth card slot.

[0067] 3111. First card slot; 3112. Second card slot; 3141. First channel opening; 3142. Second channel opening; 3143. Second cutting plane; 3161. Opening on the annular rib.

[0068] 321. First protrusion structure; 322. Second protrusion structure; 323. Second positioning structure.

[0069] 4. Deformation sheet; 41. First connecting piece; 42. Second connecting piece; 43. Third connecting piece; 431. Bulge structure on the deformation sheet.

[0070] 5. Push rod; 51. First rod part; 52. Second rod part.

[0071] 511. First cutting plane; 521. First side rib; 522. Second side rib; 523. Partition.

[0072] 6. Elastic member.

[0073] 7. Plugging block; 71. Groove. Detailed implementation mode

[0074] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail in conjunction with the accompanying drawings.

[0075] This embodiment relates to a plug, which can be a power plug. For example, it can be the plug of a mobile socket. This plug can also be the plug of an electrical device. For example, it can be the plugs of a washing machine, a refrigerator, etc. The plug in this embodiment can be a plug with a power cord or a plug without a power cord. The plug in this embodiment includes a plug with two pins, namely a first-pole pin and a second-pole pin, or can also be a plug with three pins, namely a first-pole pin, a second-pole pin, and a third-pole pin.

[0076] Among them, in three-phase alternating current, the first-pole pin is used to connect to the live wire, so it is also called the L-pole pin. The second-pole pin is used to connect to the neutral wire, so it is also called the N-pole pin. The third-pole pin is used to connect to the earth wire, so it is also called the E-pole pin or the ground-pole pin.

[0077] An overload protection module is integrated in the plug described in this embodiment. Therefore, the plug in this embodiment is also called an overload protection plug. In this embodiment, without changing the shape and size of the plug, the overload protection module is integrated into the plug.

[0078] The plug in this embodiment is equipped with an overload protection module, which is beneficial to reducing the size of the mobile socket connected to the plug. This is because the overload protection module is integrated into the plug. Then, there is no need to arrange an overload protection module in the mobile socket. This not only improves the use safety of the plug and the socket, but also reduces the volume of the socket, enabling more jacks to be arranged within a limited size.

[0079] The following will introduce in detail the structural features of the plug described in this embodiment.

[0080] As Figure 1 shown, it is a schematic structural diagram of the plug. Figure 1 The plug shown is a plug with a power cord, and the power cord is not fully shown. As Figure 2 shown, it is a schematic structural diagram of the pin bracket of the plug. As Figure 3 shown, it is a schematic structural diagram of the overload protection module arranged on the pin bracket.

[0081] As Figures 1 to 4As shown, the plug includes a plug housing 100, a pin bracket 200, a pin assembly, and an overload protection module 400. The pin bracket 200 is plate-shaped and has a jack that penetrates its thickness. If the plug is a two-pin plug, the pin bracket 200 has a first-pole jack 201 and a second-pole jack 202. The first-pole jack 201 is used to assemble the first-pole pin 301, so it is also called the L-pole jack. The second-pole jack 202 is used to assemble the second-pole pin 302, so it is also called the N-pole jack.

[0082] Reference Figure 2 As shown, the first-pole jack 201 and the second-pole jack 202 are symmetrically arranged about the center line of the pin bracket 200. Among them, the center line of the pin bracket 200 is a straight line parallel to the outgoing direction of the power line and passing through the center position of the pin bracket 200.

[0083] If the plug is a three-pin plug, the pin bracket 200 will also have a third-pole jack 203. The third-pole jack 203 is used to assemble the third-pole pin 303, so it is also called the E-pole jack or the ground-pole jack. Reference Figure 2 As shown, the third-pole jack 203 is located on the center line of the pin bracket 200.

[0084] In this embodiment, for the convenience of introduction, a three-pin plug as shown in Figure 3 is taken as an example.

[0085] Reference Figure 3 As shown, the first-pole pin 301 is fixed in the first-pole jack 201, and a part of the first-pole pin 301 extends out of the first surface of the pin bracket 200 (denoted as the front surface of the pin bracket 200), and another part extends out of the second surface of the pin bracket 200 (denoted as the back surface of the pin bracket 200). The first surface and the second surface are opposite in position.

[0086] Continue to refer to Figure 3 As shown, the second-pole pin 302 is fixed in the second-pole jack 202, and a part of the second-pole pin 302 extends out of the first surface of the pin bracket 200, and another part extends out of the second surface of the pin bracket 200.

[0087] Continue to refer to Figure 3 As shown, the third-pole pin 303 is fixed in the third-pole jack 203, and a part of the third-pole pin 303 extends out of the first surface of the pin bracket 200, and another part extends out of the second surface of the pin bracket 200.

[0088] Reference Figure 3As shown, the portions of the first pole pin 301, the second pole pin 302, and the third pole pin 303 that extend beyond the first surface of the pin holder 200 all have connection terminals, which are respectively denoted as the connection terminal 3011 of the first pole pin 301, the connection terminal 3021 of the second pole pin 302, and the connection terminal 3031 of the third pole pin 303.

[0089] As Figures 3 to 5 shown, the overload protection module 400 is located on the first surface of the pin holder 200 and is between the first pole jack 201 and the second pole jack 202. Among them, the center line of the overload protection module 400 is collinear with the center line of the pin holder 200 (i.e., on a straight line).

[0090] Continuing to refer to Figures 3 to 5 shown, for the three-pin plug, the overload protection module 400 is specifically between the first pole jack 201 and the second pole jack 202, and is also between the third pole jack 203 and the first position. Among them, the first position is specifically located on the center line of the pin holder 200 and at the edge position of the pin holder 200, that is, the position where the center line of the pin holder 200 intersects the edge of the pin holder 200.

[0091] As Figure 2 and referring to Figure 5 shown, the area enclosed by the first pole jack 201, the second pole jack 202, the third pole jack 203, and the above-mentioned first position is the idle area inside the plug. Then, by arranging the overload protection module in this idle area, it is possible to integrate the overload protection module into the plug without changing the shape and size of the plug, so that the plug has the overload protection function.

[0092] As Figure 5 and referring to Figure 1 shown, both the pin holder 200 and the overload protection module 400 are located in the plug housing 100. Moreover, the portion of the first pole pin 301 that extends beyond the second surface of the pin holder 200 (which can be denoted as the pin part) also extends beyond the plug housing 100. The portion of the second pole pin 302 that extends beyond the second surface of the pin holder 200 (which can be denoted as the pin part) also extends beyond the plug housing 100. The portion of the third pole pin 303 that extends beyond the second surface of the pin holder 200 (which can be denoted as the pin part) also extends beyond the plug housing 100. The pin parts of these three pins that extend beyond the plug housing 100 are used to insert into the three jacks of the socket to obtain power.

[0093] Continuing to refer to Figure 1 and Figure 5As shown, the portions of the first - pole pin 301, the second - pole pin 302, and the third - pole pin 303 that extend beyond the first surface of the pin support 200 are all located within the plug housing 100.

[0094] As described above, the first - pole pin 301 is connected to the live wire, the second - pole pin 302 is connected to the neutral wire. The live wire is the energized line, and the neutral wire is not energized and only responsible for returning the current to the power source. Then, based on the need to cut off the power supply in a timely manner and for safety considerations, the overload protection module inside the plug needs to be connected to the first - pole line inside the plug. For this reason, the overload protection module 400 can be electrically connected between the first - pole pin 301 and the first - pole wire of the power supply line.

[0095] Correspondingly, the overload protection module 400 includes two wiring structures. One of the two wiring structures is used to connect to the first - pole pin 301, and the other wiring structure is used to connect to the first - pole wire of the power supply line extending into the plug housing 100. Refer to Figure 5 As shown, the wiring structure used to connect to the first - pole pin 301 is denoted as the first wiring structure 1, and the wiring structure used to connect to the first - pole wire of the power supply line is denoted as the second wiring structure 2.

[0096] Then, continue to refer to Figure 5 As shown, the overload protection module 400 includes a module housing 3. The first wiring structure 1 has a terminal 11 that extends beyond the module housing 3. The portion of the first - pole pin 301 that extends beyond the first surface of the pin support 200 has a terminal 3011. Then, the terminal 11 of the first wiring structure 1 is connected to the terminal 3011 of the first - pole pin 301.

[0097] Continue to refer to Figure 5 As shown, the second wiring structure 2 has a terminal 21 that extends beyond the module housing 3. The terminal 21 of the second wiring structure 2 is used to connect to the second - pole wire of the power supply line.

[0098] When the first wiring structure 1 and the second wiring structure 2 are electrically connected, the first - pole wire of the power supply line is connected to the first - pole pin 301. When the first wiring structure 1 and the second wiring structure 2 are disconnected from the electrical connection, the first - pole wire of the power supply line is disconnected from the first - pole pin 301.

[0099] Then, the overload protection module 400 can be configured such that when the internal temperature is relatively high, such as higher than the first temperature threshold, the first wiring structure 1 and the second wiring structure 2 are disconnected from the electrical connection. When the internal temperature is relatively low, such as lower than the second temperature threshold, the first wiring structure 1 and the second wiring structure 2 are connected to the electrical connection. Generally, the first temperature threshold is greater than the second temperature threshold.

[0100] In an application, when an overload or short circuit occurs in the circuit connected to the plug, the current value on the circuits where the first wiring structure 1 and the second wiring structure 2 are located inside the overload protection module is relatively large and the temperature is relatively high, which causes the first wiring structure 1 and the second wiring structure 2 to disconnect the electrical connection. When the circuit connected to the plug operates normally, the current value on the circuits where the first wiring structure 1 and the second wiring structure 2 are located inside the overload protection module is within the normal range, and the temperature is also within the normal range. Then, the first wiring structure 1 and the second wiring structure 2 maintain the electrical connection.

[0101] In one example, when the temperature inside the overload protection module is relatively high, the first wiring structure 1 and the second wiring structure 2 automatically disconnect the electrical connection. And when the temperature is relatively low, the first wiring structure 1 and the second wiring structure 2 can also automatically switch to the electrical connection state. For safe use, when the temperature is relatively low, the first wiring structure 1 and the second wiring structure 2 can be prompted to switch to the electrical connection state through the reset button.

[0102] Correspondingly, referring to Figure 5 As shown, the overload protection module has a button 401, and the button 401 is also called the reset button. Referring to Figure 1 As shown, it is exposed at the top of the plug housing 100. Then, when the button 401 is in the pressed state, the first wiring structure 1 and the second wiring structure 2 are in the on state (i.e., the electrical connection state), and when the button 401 is in the popped-up state, the first wiring structure 1 and the second wiring structure 2 are in the off state (i.e., the disconnected electrical connection state).

[0103] As described above, the first wiring structure 1 of the overload protection module is used to connect to the first pole pin 301. Then, in order to facilitate the connection between the wiring terminal 11 of the first wiring structure 1 and the wiring terminal 3011 of the first pole pin 301, the part of the first wiring structure 1 extending out of the module housing 3, that is, the wiring terminal 11 of the first wiring structure 1, can be on the same side of the module housing 3 as the first pole pin 301.

[0104] As for the part of the second wiring structure 2 of the overload protection module extending out of the module housing 3, that is, the wiring terminal 21 of the second wiring structure 2, it can be on the same side of the module housing 3 as the wiring terminal 11 of the first wiring structure 1, or on the opposite side of the module housing 3 from the wiring terminal 11 of the first wiring structure 1.

[0105] However, since the wiring terminal 21 of the second wiring structure 2 is used to connect to the first pole wire of the power supply line, and the second pole pin 302 is used to connect to the second pole wire of the power supply line. If the wiring terminal 21 of the second wiring structure 2 is on the same side of the module housing 3 as the second pole pin 302, it will be easy to have a short circuit due to the connection between the first pole wire and the second pole wire.

[0106] Therefore, referring toFigure 5 As shown, the terminal 21 of the second wiring structure 2 is also on the same side of the module housing 3 as the first pole pin 301, and the module housing 3 is located between the first pole pin 301 and the second pole pin 302. Therefore, it can be achieved that the terminal 21 of the second wiring structure 2 and the second pole pin 302 are on different sides of the module housing 3, so as to reduce the probability of connection between the first pole wire and the second pole wire of the power cord.

[0107] Since both the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are on the same side of the module housing 3 as the first pole pin 301, refer to Figure 5 As shown, the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are both on the left side of the module housing 3. Then, along the straight line parallel to the center line of the pin bracket 200, the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are distributed front and back on the left side of the module housing 3.

[0108] Considering that the terminal 11 of the first wiring structure 1 is used to connect to the first pole pin 301, and the first pole jack 201 where the first pole pin 301 is located is an idle area inside the plug at a position far from the power cord. Therefore, the terminal 21 of the second wiring structure 2 is farther from the power cord than the terminal 11 of the first wiring structure 1. It can also be understood that, refer to Figure 5 As shown, along the front - back direction parallel to the center line of the pin bracket 200, in the orientation with the third pole pin 303 in the front and the power cord in the back, the terminal 21 of the second wiring structure 2 is in the front and the terminal 11 of the first wiring structure 1 is in the back.

[0109] Refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 is in front of the terminal 11 of the first wiring structure 1, and the terminal 21 of the second wiring structure 2 and the terminal 3021 of the second pole pin 302 are on different sides of the module housing 3, and the positions of the terminal 3021 of the second pole pin 302 and the terminal 11 of the first wiring structure 1 are symmetric about the module housing 3. Therefore, refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 and the terminal 3021 of the second pole pin 302 are diagonally distributed and are far apart. Then, the first pole wire (i.e., the L - pole wire) of the power cord connected to the terminal 21 of the second wiring structure 2 and the second pole wire (i.e., the N - pole wire) of the power cord connected to the terminal 3021 of the second pole pin 302 are far apart and are not likely to be connected. Therefore, as Figure 5 As shown, the arrangement of the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 is beneficial to improving the application safety of the plug.

[0110] Since the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are distributed along the front and back of the module housing 3 on the same side of the module housing 3, in order to facilitate the connection of the terminal 21 of the second wiring structure 2 to the first-pole wire of the power supply line, correspondingly, referring to Figure 4 As shown, in the direction perpendicular to the plug holder 200 (this direction is also the thickness direction of the plug), the terminal 11 of the first wiring structure 1 is located between the terminal 21 of the second wiring structure 2 and the first surface of the plug holder 200. It can also be understood that the terminal 11 of the first wiring structure 1 is lower than the terminal 21 of the second wiring structure 2. It can also be understood that the terminal 11 of the first wiring structure 1 is closer to the plug holder 200 than the terminal 21 of the second wiring structure 2.

[0111] For example, if the terminal 11 of the first wiring structure 1 is in a sheet shape and the plane where it is located is parallel to the first surface of the plug holder 200, and the terminal 21 of the second wiring structure 2 is in a cylindrical shape and the axial center line is perpendicular to the first surface of the plug holder 200, then the top surface of the terminal 11 of the first wiring structure 1 (i.e., the surface facing away from the first surface of the plug holder 200) is lower than the bottom end of the second wiring structure 2 (i.e., the end facing the first surface of the plug holder 200).

[0112] With the above arrangement, the terminal 11 of the first wiring structure 1 will not interfere with the connection of the terminal 21 of the second wiring structure 2 to the first-pole wire of the power supply line. For example, when using a tool to crimp the first-pole wire of the power supply line to the terminal 21 of the second wiring structure 2, the terminal 11 of the first wiring structure 1 is not likely to interfere with the operation of the crimping tool.

[0113] Then, during wiring, since the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are far apart in the direction perpendicular to the plug holder 200, the terminal 11 of the first wiring structure 1 is not likely to interfere with the wiring operation of the terminal 21 of the second wiring structure 2 to the first-pole wire of the power supply line, and the terminal 21 of the second wiring structure 2 is not likely to interfere with the wiring operation of the terminal 11 of the first wiring structure 1 to the terminal 3011 of the first-pole plug 301. Thus, the wiring efficiency is improved.

[0114] Referring to Figure 4 As shown, since the terminal 11 of the first wiring structure 1 is lower than the terminal 21 of the second wiring structure 2, and the terminal 11 of the first wiring structure 1 is used to connect to the terminal 3011 of the first-pole plug 301, and the terminal 21 of the second wiring structure 2, the terminal 3021 of the second-pole plug 302, and the terminal 3031 of the third-pole plug 303 are respectively used to be electrically connected to the first-pole wire, the second-pole wire, and the third-pole wire of the power supply line, then, referring to Figure 3As shown, the terminal 3011 of the first pole pin 301 is lower than the terminal 3021 of the second pole pin 302 and also lower than the terminal 3031 of the third pole pin 303. It can also be understood that in the direction perpendicular to the pin support 200 (i.e., the thickness direction of the plug), the terminal 3011 of the first pole pin 301 is located between the terminal of the terminal 3021 of the second pole pin 302 and the first surface of the pin support 200. It can also be understood that the terminal 3011 of the first pole pin 301 is closer to the first surface of the pin support 200 compared to the terminal 3021 of the second pole pin 302.

[0115] Among them, the terminals 3021 of the second pole pin 302 and the terminals 3031 of the third pole pin 303 may have the same height relative to the pin support 200.

[0116] For example, if the terminal 3011 of the first pole pin 301 is in a convex column shape and is located at the top of the pin part of the first pole pin 301, and the terminal 3021 of the second pole pin 302 is in a cylindrical shape and the axial center line is perpendicular to the first surface of the pin support 200, then, referring to Figure 3 As shown, the top end of the terminal 3011 of the first pole pin 301 (i.e., the end facing away from the pin support 200) is lower than the bottom end of the terminal 3021 of the second pole pin 302 (i.e., the end facing the pin support 200).

[0117] Based on the above, referring to Figure 3 As shown, in terms of structure, the first pole pin 301 may include a pin part and a terminal 3011. The pin part is fixed in the first pole jack 201, and one end of the pin part extends out of the first surface of the pin support 200, and the other end of the pin part extends out of the second surface of the pin support 200. The terminal 3011 is located at the end of the pin part that extends out of the first surface of the pin support 200. The terminal 3011 is in a convex column shape and is located at the middle position of the top of the pin part, protruding in the direction away from the first surface of the pin support 200.

[0118] Continuing to refer to Figure 3 As shown, in terms of structure, the second pole pin 302 and the third pole pin 303 may include a pin part, a terminal, and a connecting part connected between the pin part and the terminal. Taking the second pole pin 302 as an example, the pin part of the second pole pin 302 is fixed in the second pole jack 202, one end of the pin part extends out of the first surface of the pin support 200, the other end of the pin part extends out of the second surface of the pin support 200, the connecting part is fixed to the end of the pin part that extends out of the first surface of the pin support 200, and the terminal 3021 is fixed to the connecting part. Among them, the terminal is in a cylindrical shape, and its axial center line is perpendicular to the first surface of the pin support 200. The cylindrical terminal is formed by rolling up a rectangular conductive sheet (such as a copper sheet).

[0119] Continue to refer to Figure 3 As shown, the pin parts of the first-pole pin 301, the second-pole pin 302, and the third-pole pin 303 protrude from the top of the first surface of the pin bracket 200, and are substantially in the same plane, which is parallel to the first surface of the pin bracket 200.

[0120] It should be noted that, referring to Figure 4 and Figure 5 As shown, the terminal 21 of the second wiring structure 2 for connecting to the power line, the terminal 3021 of the second-pole pin 302, and the terminal 3031 of the third-pole pin 303 are all lower than the height of the module housing 3 in the thickness direction. For example, the terminal 21 of the second wiring structure 2, the terminal 3021 of the second-pole pin 302, and the terminal 3031 of the third-pole pin 303 are all approximately at the middle position of the module housing 3. This height relationship ensures that the overload protection module does not cause the plug to be too high, or even change the original height of the plug.

[0121] The following describes the wiring method for connecting the power line to the terminal 21 of the second wiring structure 2, the terminal 3021 of the second-pole pin 302, and the terminal 3031 of the third-pole pin 303 respectively.

[0122] Among them, the connection method between the power line and the pin can be through a terminal connection or a crimping method.

[0123] As described above, the terminal 21 of the second wiring structure 2, the terminal 3021 of the second-pole pin 302, and the terminal 3031 of the third-pole pin 303 are all cylindrical. Then, the wiring method can be crimping. For example, the power line extends into the cylinder, and a crimping tool is used to flatten the cylinder so that the terminal is fixedly connected to the power line.

[0124] To facilitate flattening the cylindrical terminal, correspondingly, referring to Figure 5 As shown, the cylindrical terminals all have openings, and the length direction of the openings is parallel to the axial center line of the cylinder. Then, the strength of the cylindrical terminal at the opening is weak and it is easy to press the wire.

[0125] Continue to refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 has an opening 211 penetrating the thickness of the cylinder wall, the terminal 3021 of the second-pole pin 302 has an opening penetrating the thickness of the cylinder wall ( Figure 5 specifically, a gap penetrating the length and thickness of the cylinder wall in Figure 3Specifically, it is a gap running through the length and thickness of the cylinder wall).

[0126] Among them, the openings on the connection terminals 3021 of the second pole plug 302 and the connection terminals 3031 of the third pole plug 303 are both rectangular conductive sheets (such as copper sheets). After rolling up the cylindrical connection terminals, the left and right edges of the conductive sheets are butted to form the gaps.

[0127] In one example, the opening 211 on the connection terminal 21 of the second connection structure 2 does not run through the length of the cylinder wall and is a groove structure opened on the cylinder wall that runs through the thickness of the cylinder wall. For easy wire pressing, refer to Figure 6 As shown, the number of openings 211 on the cylinder wall of the connection terminal 21 can be two. One opening 211 extends from the top end to the bottom end of the connection terminal 21, and the other opening 211 extends from the bottom end to the top end of the connection terminal 21. Among them, the center lines of these two openings 211 can be collinear.

[0128] In one example, continue to refer to Figure 6 As shown, the opening 211 on the connection terminal 21 can be closer to the protruding structure 213 on the connection terminal 21. This is because the protruding structure 213 is located on the side edge of the connection terminal 21, so both the side edge and the opening 211 of the connection terminal 21 are weak stress positions and are more suitable for wire pressing. Among them, the structural features of the second connection structure 2 will be introduced below.

[0129] Continue to refer to Figure 5 As shown, the center line of the opening 211 on the connection terminal 21 of the second connection structure 2 and the center line of the opening on the connection terminal 3021 of the second pole plug 302 are on a straight line parallel to the center line of the plug holder 200. For example, the straight line parallel to the center line of the plug holder 200 and passing through the center of the connection terminal 21 of the second connection structure 2 also passes through the opening 211 on the connection terminal 21 of the second connection structure 2. The straight line parallel to the center line of the plug holder 200 and passing through the center of the connection terminal 3021 of the second pole plug 302 also passes through the opening on the connection terminal 3021 of the second pole plug 302.

[0130] Continue to refer to Figure 5 As shown, the center line of the opening on the connection terminal 3031 of the third pole plug 303 is on a straight line perpendicular to the center line of the plug holder 200. For example, the straight line perpendicular to the center line of the plug holder 200 and passing through the center of the connection terminal 3031 of the third pole plug 303 also passes through the opening on the connection terminal 3031 of the third pole plug 303.

[0131] In one example, the openings 211 on the terminal 21 of the second wiring structure 2 and the openings on the terminal 3021 of the second pole pin 302 can face the same direction or opposite directions. For example, referring to Figure 5 As shown, the openings 211 on the terminal 21 of the second wiring structure 2 and the openings on the terminal 3021 of the second pole pin 302 face opposite directions. The opening 211 on the terminal 21 of the second wiring structure 2 faces forward, and the opening on the terminal 3021 of the second pole pin 302 faces backward.

[0132] Based on the fact that the opening 211 on the terminal 21 of the second wiring structure 2 and the opening on the terminal 3021 of the second pole pin 302 are both in the front - back direction as shown in Figure 5 As shown, and the opening on the terminal 3031 of the third pole pin 303 is in the left - right direction as shown in Figure 5 As shown, for the three conductors of the power cord, during the crimping with these three terminals, the crimping of the first - pole conductor of the power cord with the terminal 21 of the second wiring structure 2 and the crimping of the second - pole conductor of the power cord with the terminal 3021 of the second pole pin 302 belong to front - back crimping and can be crimped simultaneously. The crimping of the third - pole conductor of the power cord with the terminal 3031 of the third pole pin 303 belongs to left - right crimping.

[0133] Referring to Figure 5 As shown, although the overload protection module 400 is arranged at the rear side of the terminal 3031 of the third pole pin 303 and the two are in close proximity, since the crimping direction of the terminal 3031 of the third pole pin 303 with the third - pole conductor of the power cord is in the left - right direction, the overload protection module 400 basically does not interfere with the connection between the third pole pin 303 and the third - pole conductor of the power cord.

[0134] Then, referring to Figure 5 As shown, for the power cord extending into the plug housing 100, its first - pole conductor, second - pole conductor, and third - pole conductor can respectively extend into the terminal 21 of the second wiring structure 2, the terminal 321 of the second pole pin 302, and the terminal 3031 of the third pole pin 303. Then, a crimping tool is used to perform front - back crimping on the terminals 21 and 3021 and left - right crimping on the terminal 3031.

[0135] In one example, the plug housing 100 usually wraps the pin support 200 and the overload protection module 400 through a potting method. During the formation of the plug housing 100 through the potting method, in order to prevent the power cord from moving left - right in the left - right direction and up - down in the thickness direction, correspondingly, referring to Figures 2 to 5As shown, the plug bracket 200 has a power cord bracket 204 at the first position described above. The first position is the intersection of the center line of the plug bracket 200 and the edge of the plug bracket 200, and is away from the position of the third-pole jack 203 on the plug bracket 200.

[0136] Among them, the power cord bracket 204 is used to support and limit the power cord extending into the plug housing 100.

[0137] Reference Figure 3 As shown, the power cord bracket 204 includes a horizontal part and a vertical part that are vertically connected. Among them, the horizontal part is fixed at the first position of the plug bracket 200, the vertical part is vertically connected to the horizontal part, and extends upward compared to the first surface of the plug bracket 200.

[0138] Continue to refer to Figure 3 As shown, the vertical part of the power cord bracket 204 has a power cord hole 2041. Then, the power cord extending into the plug housing 100 passes through the power cord hole 2041, thereby limiting the circumferential direction of the power cord without affecting the axial movement. The axial movement is for pulling during crimping.

[0139] In one example, the power cord includes an insulating layer wrapped on the outside and three wires located inside the insulating layer, namely the first-pole wire, the second-pole wire, and the third-pole wire. During wiring, the insulating layer at the end of the power cord has been peeled off and the three wires are exposed. In this case, when threading into the power cord hole 2041, it is not easy for the three wires to be inserted into the power cord hole 2041 at the same time. For this reason, refer to Figure 3 As shown, the top end of the vertical part of the power cord bracket 204 has an opening 2042. The opening 2042 of the power cord bracket 204 is communicated with the power cord hole 2041, and the size of the opening 2042 of the power cord bracket 204 is equivalent to the outer diameter of the power cord. Then, the power cord can be snapped into the opening 2042 of the power cord bracket 204 and then into the power cord hole 2041. Then, there is no need to insert the end of the power cord into the power cord hole 2041, which facilitates the threading operation.

[0140] Furthermore, refer to Figure 5 As shown, the shape of the opening 2042 of the power cord bracket 204 at the top end away from the first surface of the plug bracket 200 is trumpet-shaped and has a larger size, which makes it easier for the power cord to be snapped into the power cord hole 2041 through the opening, further facilitating the threading operation.

[0141] The above is an introduction to the layout of the overload protection module 400 on the first surface of the plug bracket 200. Next, the features of the overload protection module 400 will be introduced.

[0142] As Figures 7 to 10As shown, it is a schematic structural diagram of the overload protection module 400, refer to Figure 7 As shown, the module housing 3 of the overload protection module includes a bottom case 31 and an upper cover 32. The bottom case 31 is in a box shape, specifically a box-shaped structure with an open top, including a bottom wall and multiple side walls. The bottom wall and the multiple side walls enclose an inner space of the box. The upper cover 32 is used to buckle on the top end of the bottom case 31.

[0143] Refer to Figure 7 As shown, there are multiple first positioning structures 317 on the top end surface of the bottom case 31, and multiple second positioning structures 323 on the bottom end surface of the upper cover 32. The bottom case 31 and the upper cover 32 are pre-positioned through the first positioning structures 317 and the second positioning structures 323.

[0144] Among them, the first positioning structure 317 on the top of the bottom case 31 can be a square hole, that is, a through hole with a square cross-sectional shape. The through hole can be a through hole that penetrates the thickness of the bottom case 31, or a blind hole that extends from the top end of the bottom case 31 along the thickness direction towards the bottom of the bottom case 31 but does not penetrate the thickness of the bottom case 31. The second positioning structure 323 on the bottom of the upper cover 32 can be a cylinder, that is, a cylinder perpendicular to the bottom end surface of the upper cover 32.

[0145] Or, the first positioning structure 317 is a cylinder perpendicular to the top end surface of the bottom case 31, and the second positioning structure 323 is a through hole on the bottom end surface of the upper cover 32.

[0146] Refer to Figure 7 As shown, the first positioning structure 317 on the top end of the bottom case 31 is specifically a square hole, and the second positioning structure 323 on the upper cover 32 is specifically a cylinder. The cylinder is inserted into the square hole. Compared with the cylinder inserted into a round hole, the four corners of the square hole can absorb machining tolerances and assembly tolerances, making it easier for the cylinder to be inserted into the square hole.

[0147] Continue to refer to Figure 7 As shown, the square hole on the top end of the bottom case 31 has a guiding structure at the top end surface. For the cylinder on the bottom end of the upper cover 32, the outer surface of its end is spherical. Then, under the action of the spherical surface and the guiding structure, the cylinder at the bottom end of the upper cover 32 is more easily inserted into the square hole on the top end of the bottom case 31, thereby improving the assembly efficiency of the overload protection module.

[0148] Based on a similar principle, the overload protection module can also be pre-positioned on the first surface of the pin bracket 200 through the cooperation of a square hole and a cylinder. For example, refer to Figure 2 As shown, there are multiple fourth positioning structures 206 on the first surface of the pin bracket 200, refer to Figure 17 As shown, there are multiple third positioning structures 318 on the outer surface of the bottom of the bottom case 31. Through the one-to-one cooperation of the third positioning structures 318 and the fourth positioning structures 206, the bottom of the bottom case 31 is pre-positioned on the first surface of the pin bracket 200.

[0149] Among them, the third positioning structure 318 can be a square hole, and the fourth positioning structure 206 can be a cylinder. Or, the third positioning structure 318 is a cylinder, and the fourth positioning structure 206 is a square hole.

[0150] As described above, the overload protection module further includes two wiring structures, namely the first wiring structure 1 and the second wiring structure 2. As Figure 7 and referring to Figure 8 shown, the first wiring structure 1 and the second wiring structure 2 are installed in the module housing 3, and a part is located inside the module housing 3, and the other part extends out of the module housing 3.

[0151] Among them, the part of the first wiring structure 1 located outside the module housing 3 includes a wiring terminal for connecting to the wiring terminal 3011 of the first pole plug 301. The part of the second wiring structure 2 located outside the module housing 3 includes a wiring terminal for connecting to the first pole wire of the power supply line.

[0152] Among them, the part of the first wiring structure 1 located inside the module housing 3 includes a connecting piece, and the part of the second wiring structure 2 located inside the module housing 3 includes a connecting piece. The connecting piece of the first wiring structure 1 and the connecting piece of the second wiring structure 2 can be electrically connected or disconnected to achieve the connection and disconnection of the overload protection module.

[0153] Again, as described above, the wiring terminal 11 of the first wiring structure 1, the wiring terminal 21 of the second wiring structure 2, and the wiring terminal 3011 of the first pole plug 301 are located on the same side of the module housing 3. Referring to Figure 7 shown, the side wall of the bottom case 31 adjacent to the first pole plug 301 is denoted as the first side wall 311. Then, the wiring terminal 11 of the first wiring structure 1 and the wiring terminal 21 of the second wiring structure 2 both extend out of the bottom case 31 through the first side wall 311. The first wiring structure 1 is clamped on the first side wall 311 of the bottom case 31, and the second wiring structure 2 is also clamped on the first side wall 311 of the bottom case 31. Regarding the clamping method, it will be introduced later in the description of the characteristics of the two wiring structures.

[0154] Next, the characteristics of the first wiring structure 1 and the second wiring structure 2 will be introduced.

[0155] The characteristics of the first wiring structure 1. Referring to Figure 7 shown, it includes a wiring terminal 11, a connecting piece 12, and a transition piece 13. Among them, the wiring terminal 11, the connecting piece 12, and the transition piece 13 are all sheet-shaped. The transition piece 13 is connected between the wiring terminal 11 and the connecting piece 12, and the transition piece 13 is perpendicularly connected to the wiring terminal 11 and the transition piece 13 is perpendicularly connected to the connecting piece 12. Among them, the wiring terminal 11 has a wiring hole for cooperating with the wiring terminal (in a convex column shape) of the first pole plug 301.

[0156] Based on the respective features of the terminal 11, the connecting piece 12, and the transition piece 13 of the first wiring structure 1 and the relationship therebetween, the three can be integrally formed and can be formed by bending a conductive sheet. For example, referring to Figure 7 as shown, for a conductive sheet in a "7-shaped" form, if its horizontal part is bent forward by 90 degrees and its vertical part is bent backward by 90 degrees, the first wiring structure 1 as shown in Figure 7 can be obtained.

[0157] As Figure 7 and referring to Figure 8 and Figure 5 shown, when the first wiring structure 1 is installed in the bottom case 31 and the bottom case 31 is installed on the first surface of the plug support 200, the terminal 11 of the first wiring structure 1 is located outside the bottom case 31 and is parallel to the first surface of the plug support 200.

[0158] Continuing to refer to Figure 7 and Figure 8 shown, after the first wiring structure 1 is installed in the bottom case 31, the connecting piece 12 of the first wiring structure 1 is located inside the bottom case 31 and is parallel to the first side wall 311 of the bottom case 31, and the transition piece 13 of the first wiring structure 1 is perpendicular to the first side wall 311 of the bottom case 31.

[0159] Continuing to refer to Figure 7 and Figure 8 shown, the transition piece 13 of the first wiring structure 1 is snap-fitted with the first side wall 311. Accordingly, the first side wall 311 has a first card slot 3111, the notch of the first card slot 3111 is at the top end of the bottom case 31, and the first card slot 3111 penetrates through the thickness of the first side wall 311.

[0160] To facilitate the insertion of the transition piece 13 of the first wiring structure 1 into the first card slot 3111 of the first side wall 311, accordingly, referring to Figure 7 shown, the notch shape of the first card slot 3111 is in a flared shape. Then, the slot width of the first card slot 3111 at the notch is larger, making it easier for the transition piece 13 to enter the first card slot 3111.

[0161] The second wiring structure 2, referring to Figure 6 shown, includes a cylindrical terminal 21, a sheet-shaped connecting piece 22, and a sheet-shaped transition piece 23. The transition piece 23 is connected between the terminal 21 and the connecting piece 22, and the transition piece 23 and the connecting piece 22 are perpendicularly connected, and the intersection line of the transition piece 23 and the connecting piece 22 is parallel to the axial center line of the terminal 21.

[0162] Based on the respective features of the terminal 21, the connecting piece 22, and the transition piece 23 of the second wiring structure 2 and the relationship therebetween, the three can be integrally formed and can be formed by bending a conductive sheet.

[0163] Then, continue to refer to Figure 6 As shown, the second wiring structure 2 can be formed by bending a straight conductive sheet once at a right angle and then rolling it up once. Refer to Figure 6 As shown, the left end portion of the conductive sheet (such as a copper sheet) is bent forward by 90 degrees at the straight line L1 (that is, bent counterclockwise around the straight line L1), forming the connecting piece 22 of the second wiring structure 2 for connecting with the deformation piece 4. Continue to refer to Figure 6 As shown, the right end portion of the conductive sheet is rolled forward at the straight line L2 (that is, rolled counterclockwise around the straight line L2) until the raised structure 213 at the right end is snapped into (that is, inserted into) the bayonet 212 on the conductive sheet, so that the rolled cylindrical structure will not rebound. Among them, refer to Figure 6 As shown, the bayonet 212 is roughly located at the intersection of the transition piece 23 and the wiring terminal 21.

[0164] This second wiring structure 2 formed by a straight conductive sheet has the characteristics of simple structure, less material consumption and low cost compared with that formed by a T-shaped conductive sheet.

[0165] Such as Figure 7 And refer to Figure 8 And Figure 5 As shown, the second wiring structure 2 is installed in the bottom shell 31. After the bottom shell 31 is installed on the first surface of the plug bracket 200, the wiring terminal 21 of the second wiring structure 2 is located outside the bottom shell 31, and the axial center line of the cylindrical wiring terminal 21 is perpendicular to the first surface of the plug bracket 200.

[0166] Continue to refer to Figure 7 And Figure 8 As shown, after the second wiring structure 2 is installed in the bottom shell 31, the connecting piece 31 of the second wiring structure 2 is located inside the bottom shell 31 and parallel to the first side wall 311 of the bottom shell 31, and the transition piece 23 of the second wiring structure 2 is perpendicular to the first side wall 311 of the bottom shell 31.

[0167] Continue to refer to Figure 7 And Figure 8 As shown, the transition piece 23 of the second wiring structure 2 is snap-connected to the first side wall 311. Then, correspondingly, the first side wall 311 has a second card slot 3112, the notch of the second card slot 3112 is at the top end of the bottom shell 31, and the second card slot 3112 penetrates through the thickness of the first side wall 311.

[0168] In order to facilitate the transition piece 23 of the second wiring structure 2 to be snapped into the second card slot 3112 of the first side wall 311, correspondingly, refer to Figure 7As shown, the notch shape of the second card slot 3112 is trumpet-shaped. Then, the slot width of the second card slot 3112 at the notch is larger, making it easier for the transition piece 23 to enter the second card slot 3112.

[0169] Reference Figure 9 As shown, after the upper cover 32 is installed on the bottom shell 31, the upper cover 32 can press against the top ends of the transition piece 13 of the first wiring structure 1 and the transition piece 23 of the second wiring structure 2, performing up and down limit on the first wiring structure 1 and the second wiring structure 2.

[0170] For example, reference Figure 7 As shown, the bottom end of the upper cover 32 has a first convex structure 321 and a second convex structure 322. Among them, the first convex structure 321 is adapted to the notch shape of the first card slot 3111, and the second convex structure 321 is adapted to the notch shape of the second card slot 3112. Reference Figure 9 As shown, after the upper cover 32 is buckled on the bottom shell 31, the first convex structure 321 is stuck at the notch of the first card slot 3111 and presses against the top end of the first wiring structure 1, and the second convex structure 322 is stuck at the notch of the second card slot 3112 and presses against the top end of the second wiring structure 2.

[0171] As described above, the notch shape of the first card slot 3111 is trumpet-shaped, and the notch shape of the second card slot 3112 is trumpet-shaped. Then, reference Figure 7 As shown, the cross-sectional shape of the first convex structure 321 is trapezoidal, and the cross-sectional shape of the second convex structure 322 is also trapezoidal. To achieve the outer surface of the first convex structure 321 to fit with the inner surface of the notch of the first card slot 3111, and the outer surface of the second convex structure 322 to fit with the inner surface of the notch of the second card slot 3112.

[0172] In one example, reference Figure 6 As shown, the axial center line of the terminal 21 is located on the first side of the transition piece 23, and the connecting piece 22 is located on the second side of the transition piece 23. Among them, the first side and the second side of the transition piece 23 are two sides that are opposite to each other along the thickness direction of the transition piece 23. Reference Figure 5 As shown, the terminal 21 and the connecting piece 22 of the second wiring structure 2 are arranged in this way, which is beneficial to increasing the distance between the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2, for facilitating riveting or welding.

[0173] As described above, the terminal 11 of the first wiring structure 1 is connected to the terminal 3011 of the first pole plug 301. Reference Figure 5As shown, the terminal 11 of the first wiring structure 1 is in the shape of a sheet and has a wiring hole thereon. The terminal 3011 of the first pole plug 301 is in the shape of a convex column. Then, the terminal 3011 of the first pole plug 301 extends into the terminal 11 of the first wiring structure 1, and then can be riveted or welded to ensure a stable connection between the two.

[0174] In one example, as described above, the first wiring structure 1 and the second wiring structure 2 can be electrically connected or disconnected. For this purpose, continue to refer to Figure 7 As shown, the overload protection module includes a deformation sheet 4. The portions of the first wiring structure 1 and the second wiring structure 2 located in the bottom case 31 are connected through the deformation sheet 4. That is, the connection sheet 12 of the first wiring structure 1 and the connection sheet 22 of the second wiring structure 2 are electrically connected and disconnected through the deformation sheet 4.

[0175] The characteristics of the deformation sheet 4 will be introduced below.

[0176] As Figure 11 shown, it is a schematic structural diagram of the deformation sheet 4. Refer to Figure 11 As shown, the deformation sheet 4 includes two connection sheets. One of these two connection sheets is connected to the first wiring structure 1, and the other is connected to the second wiring structure 2. The connection sheet used to connect to the first wiring structure 1 is denoted as the first connection sheet 41, and the connection sheet used to connect to the second wiring structure 2 is denoted as the second connection sheet 42. Then, refer to Figure 7 As shown, the first connection sheet 41 of the deformation sheet 4 is connected to the connection sheet 12 of the first wiring structure 1, and the second connection sheet 42 of the deformation sheet 4 is connected to the connection sheet 22 of the second wiring structure 2.

[0177] Among them, continue to refer to Figure 11 As shown, the first connection sheet 41 and the second connection sheet 42 are connected through a third connection sheet 43.

[0178] In order to enable both connection and disconnection between the first wiring structure 1 and the second wiring structure 2, correspondingly, in the connection between the first connection sheet 41 of the deformation sheet 4 and the connection sheet 12 of the first wiring structure 1, and the connection between the second connection sheet 42 of the deformation sheet 4 and the connection sheet 22 of the second wiring structure 2, one is a fixed connection and the other is a movable connection. For example, the connection between the first connection sheet 41 of the deformation sheet 4 and the connection sheet 12 of the first wiring structure 1 is a fixed connection, and the connection between the second connection sheet 42 of the deformation sheet 4 and the connection sheet 22 of the second wiring structure 2 is a movable connection.

[0179] Then, it can be referred to Figure 8 As shown, on the surfaces of the second connection sheet 42 of the deformation sheet 4 and the connection sheet 21 of the second wiring structure 2 facing each other, there are respectively a moving contact and a static contact.

[0180] Among them, the deformation piece 4 realizes the separation and contact of the moving contact and the static contact through high-temperature deformation and low-temperature reset.

[0181] For example, when the temperature is higher than the first temperature threshold, the deformation piece 4 deforms. After the deformation piece 4 deforms, the second connecting piece 42 of the deformation piece 4 bounces off the connecting piece 22 of the second wiring structure 2, and the moving contact bounces off the static contact, so that the electrical connection between the first wiring structure 1 and the second wiring structure 2 is disconnected. When the temperature of the deformation piece 4 is not higher than the first temperature threshold, the deformation piece 4 resets. After the deformation piece 4 resets, the moving contact on the second connecting piece 42 of the deformation piece 4 contacts the static contact on the connecting piece 22 of the second wiring structure 2, so that the first wiring structure 1 and the second wiring structure 2 are electrically connected.

[0182] Since the connection between the first connecting piece 41 of the deformation piece 4 and the connecting piece 12 of the first wiring structure 1 is a fixed connection, therefore, referring to Figure 7 as shown, the bottom case 31 has a third card slot 313 between the first side wall 311 and the second side wall 312. As Figure 8 and referring to Figure 7 as shown, after the first connecting piece 41 of the deformation piece 4 and the connecting piece 12 of the first wiring structure 1 are fixed, they are inserted into the third card slot 313 of the bottom case 31 together. Among them, the first side wall 311 and the second side wall 312 of the bottom case 31 are opposite in position.

[0183] Referring to Figure 7 and Figure 8 as shown, the notch shape of the third card slot 313 is trumpet-shaped, so as to realize the rapid insertion of the fixed deformation piece 4 and the first wiring structure 1 into the first card slot 3112, and improve the assembly efficiency.

[0184] Since the connection between the second connecting piece 42 of the deformation piece 4 and the connecting piece 22 of the second wiring structure 2 is a movable connection, the second connecting piece 42 of the deformation piece 4 is equivalent to a moving contact piece, and the connecting piece 22 of the second wiring structure 2 is equivalent to a static contact piece. The second connecting piece 42 of the deformation piece 4 will bounce off and reset relative to the connecting piece 22 of the second wiring structure 2. Then, during the bouncing-off and reset process of the second connecting piece 42 of the deformation piece 4, it will push the second wiring structure 2 to move in a direction perpendicular to the first side wall 311.

[0185] Therefore, continue to refer to Figure 7As shown, the second wiring structure 2 has a card slot 231. For example, the transition piece 23 of the second wiring structure 2 has a card slot 231. The notch of the card slot 231 of the second wiring structure 2 faces in the opposite direction to the notch of the second card slot 3112 on the first side wall 311. Then, the card slot 231 of the second wiring structure 2 is inserted into the second card slot 3112 on the first side wall 311, so that the card slot 231 of the second wiring structure 2 is stuck on the first side wall 311 and the second card slot 3112 is stuck on the second wiring structure 2. Then, during the process of the second connecting piece 42 of the deformation piece 4 bouncing open and resetting, under the limitation of the card slot 231 and the second card slot 3112, the second wiring structure 2 will not move along the direction perpendicular to the first side wall 311.

[0186] Continue to refer to Figure 7 As shown, the notch shape of the card slot 231 on the second wiring structure 2 is trumpet-shaped, and the notch shape of the second card slot 3112 is trumpet-shaped, so as to realize the rapid plug-in connection of the card slot 231 of the second wiring structure 2 and the first card slot 3112 and improve the assembly efficiency.

[0187] Among them, the principle that the deformation piece 4 undergoes high-temperature deformation and low-temperature reset can be caused by the different thermal expansion coefficients of the two sides of the deformation piece 4 along the thickness direction.

[0188] For example, the deformation piece 4 can be a bimetallic sheet formed by two metal materials with different thermal expansion coefficients. For example, the deformation piece 4 includes a first metal sheet and a second metal sheet. Among them, the thermal expansion coefficient of the first metal sheet is greater than that of the second metal sheet, and the first metal sheet and the second metal sheet are bonded and fixed together to form the deformation piece 4.

[0189] In this way, when the temperature inside the overload protection module is relatively high, the thermal expansion coefficient of the first metal sheet is greater than that of the second metal sheet. Therefore, the deformation amount of the first metal sheet is greater than that of the second metal sheet. However, the first metal sheet and the second metal sheet are always fixed together, and thus the first metal sheet with a large deformation amount bends towards the second metal sheet with a small deformation amount.

[0190] Refer to Figure 8 As shown, the connecting piece 12 of the first wiring structure 1 is parallel and located at the inner surface of the first side wall 311, and the connecting piece 22 of the second wiring structure 2 is parallel and located at the inner surface of the first side wall 311. Then, after the deformation piece 4 is installed in the bottom case 31, the first metal sheet of the deformation piece 4 faces the first side wall 311 of the bottom case 31, and the second metal sheet of the deformation piece 4 faces away from the first side wall 311. Among them, the moving contact on the second connecting piece 42 of the deformation piece 4 is arranged on the surface of the first metal sheet.

[0191] Refer to Figure 7 and Figure 8As shown, the first connecting piece 41 of the deformation piece 4 is fixedly connected to the connecting piece 12 of the first wiring structure 1 and is stuck in the third card slot 313 of the bottom case 31. Therefore, when the deformation piece 4 deforms, the second connecting piece 42 of the deformation piece 4 will swing (also called bounce) away from the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum, so that the moving contact on the second connecting piece 42 of the deformation piece 4 is separated from the static contact on the connecting piece 22 of the second wiring structure 2. Once the two are separated, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is disconnected.

[0192] When the deformation piece 4 resets, the second connecting piece 42 of the deformation piece 4 will swing towards the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum, so that the moving contact on the second connecting piece 42 of the deformation piece 4 contacts the static contact on the connecting piece 22 of the second wiring structure 2. Once the two are in contact, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is connected.

[0193] In one example, in order to make the second connecting piece 42 of the deformation piece 4 bounce away from the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum, correspondingly, as Figure 10 and referring to Figure 8 shown, after the deformation piece 4 is installed in the bottom case 31, there is a distance H between the deformation piece 4 (such as the bulging structure 43 of the deformation piece 4) and the second side wall 312. This distance is used for the deformation piece 4 to deform. The second connecting piece 42 of the deformation piece 4 bounces away from the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum.

[0194] In one example, because the thickness of the deformation piece 4 is relatively thin (such as less than 0.2 mm), the stiffness of the deformation piece 4 is relatively small, and it is easy to cause the second connecting piece 42 of the deformation piece 4 to be separated from the connecting piece 22 of the second wiring structure 2 when the temperature changes slightly. For this reason, referring to Figure 10 and Figure 11 shown, the third connecting piece 43 between the first connecting piece 41 and the second connecting piece 42 of the deformation piece 4 has a bulging structure 431 that bulges towards the second side wall 312, that is, away from the first side wall 311. The bulging structure 431 is in the shape of a pot or a bowl and bulges towards one side of the deformation piece 4. Therefore, the deformation piece 4 is sometimes also called a dome switch.

[0195] Among them, the bulging structure 431 between the first connecting piece 41 and the second connecting piece 42 of the deformation piece 4 is beneficial to improving the overall stiffness of the deformation piece 4.

[0196] In one example, in order to further improve the overall stiffness of the deformation piece 4, referring to Figure 11As shown, the portion between the edge of the third connecting piece 43 and the bulging structure 431 is sheet-shaped, and the plane where it is located is not coplanar with the plane where the first connecting piece 41 is located, so that the first connecting piece 41 and the sheet-shaped area of the third connecting piece 43 are bent and connected. This kind of bent connection can improve the stiffness of the deformation piece 4.

[0197] Similarly, continue to refer to Figure 11 As shown, the plane where the sheet-shaped area between the edge of the third connecting piece 43 and the bulging structure 431 is located is also not coplanar with the plane where the second connecting piece 42 is located, so that the second connecting piece 42 and the sheet-shaped area of the third connecting piece 43 are bent and connected, improving the stiffness of the deformation piece 4.

[0198] As for the plane where the first connecting piece 41 is located and the plane where the second connecting piece 42 is located, they can be coplanar or not coplanar. Since the second connecting piece 42 swings back and forth at high temperature with the first connecting piece 41 as the fulcrum, the planes where the first connecting piece 41 and the second connecting piece 42 are located are coplanar.

[0199] In this way, when the temperature changes, although both the first metal sheet and the second metal sheet will deform, and the deformation of the first metal sheet is greater than that of the second metal sheet, because the stiffness of the deformation piece 4 is relatively large, the deformation force of the first metal sheet will not cause the second connecting piece 42 to bounce off. When the temperature exceeds the set threshold (such as the first temperature threshold), the deformation force of the first metal sheet further increases, and the deformation force of the first metal sheet will increase to overcome the stiffness of the entire deformation piece 4, causing the second connecting piece 42 to bend towards the second side and bounce off relative to the connecting piece 22 of the second wiring structure 2. Thus, the moving contact on the first side of the second connecting piece 42 is separated from the static contact on the connecting piece 22 of the second wiring structure 2.

[0200] It should be noted that the deformation piece 4 can be not only a bimetallic sheet structure, but also a metal sheet formed of a shape memory alloy material.

[0201] As described above, the overload protection module 400 also has a button 401 for resetting. When the first wiring structure 1 and the second wiring structure 2 are in a disconnected electrical connection state, by pressing the button 401, the first wiring structure 1 and the second wiring structure 2 can be reset to the electrical connection state. Correspondingly, the overload protection module also includes a reset mechanism.

[0202] Next, the characteristics of the reset mechanism will be introduced.

[0203] As Figure 12 shown, it is a schematic structural diagram of the overload protection module. Refer to Figure 12 shown, the overload protection module also includes a reset mechanism. As Figure 13 shown is a schematic diagram of the reset mechanism. Refer to Figure 13As shown, the reset mechanism includes a push rod 5 and an elastic member 6. Among them, the push rod 5 can also be called a reset rod or a reset push rod, etc. The elastic member 6 is exemplified by a spring.

[0204] Refer to Figure 12 As shown, the bottom of the push rod 5 extends into the bottom case 31 of the module housing 3. The top end of the push rod 5 serves as the button 401 of the overload protection module. Therefore, refer to Figure 5 As shown, the top end of the push rod 5 passes through the upper cover 32 of the module housing 3. Refer to Figure 1 As shown, the top end of the push rod 5 also passes through the plug housing 100 and is exposed at the top end of the plug housing 100. For example, the top end of the push rod 5 is flush with the outer surface of the plug housing 100, or the top end of the push rod 5 extends out of the outer surface of the plug housing 100 for the user to press and operate. And the elastic member 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom case 31.

[0205] It should be noted that the top end of the push rod 5 can also be located inside the plug housing 100 without being exposed. For example, the top end of the push rod 5 is flush with or extends out of the module housing 3 of the overload protection module, but is located inside the plug housing 100. When the user needs to press the push rod 5 to reset, the plug housing 100 can be opened to press the push rod 5.

[0206] As Figure 14 shown, it is a schematic structural diagram of the push rod 5. As Figure 15 and Figure 16 shown, they are schematic diagrams before and after the push rod 5 is installed in the bottom case 31.

[0207] Refer to Figure 14 As shown, the bottom of the push rod 5 has a spacer 523. When the button 401 is in the pressed state and the deformation piece 4 is in the reset state, refer to Figure 12 shown, the spacer 523 is located at the bottom of the bottom case 31, specifically between the bottom of the bottom case 31 and the moving contact of the deformation piece 4. That is, the spacer 523 is directly below the moving contact, so that the static contact on the connecting piece of the second wiring structure 2 contacts the moving contact on the second connecting piece 42 of the deformation piece 4. When the button 401 is in the unpressed state and the deformation piece 4 is in the reset state, the spacer 523 contacts the static contact and is sandwiched between the moving contact and the static contact to achieve electrical isolation between the moving contact and the static contact.

[0208] For example, the current passing through the circuit where the overload protection module is located is relatively large, generating a large amount of heat, causing the temperature inside the overload protection module to be higher than the preset temperature threshold, and the deformable sheet 4 is deformed, that is, the second connecting sheet 42 of the deformable sheet 4 is bent and deformed with the first connecting sheet 41 as the fulcrum, causing the moving contact on the deformable sheet 4 to bounce relative to the static contact on the second wiring structure 2. At this time, the push rod 5 moves upward under the action of the elastic member 6, and moves to the spacer 523 of the push rod 5 relative to and in contact with the static contact. When the temperature inside the overload protection module cools down, the deformable sheet 4 is reset, but at this time, the moving contact and the static contact are separated by the spacer 523 of the push rod 5, so the user needs to press the button 401 to move the push rod 5 downward until the spacer 523 of the push rod 5 is located below the moving contact and no longer between the moving contact and the static contact. At this time, the moving contact and the static contact resume contact, and the overload protection module resumes the on state.

[0209] It can be seen that under normal circumstances, that is, when the temperature inside the overload protection module does not exceed the temperature threshold that causes power outage, the reset mechanism causes the moving contact and the static contact in the overload protection module to combine. After the temperature inside the overload protection module returns to normal, the moving contact and the static contact are not automatically caused to combine, but the moving contact and the static contact can only be restored to combine after the technician presses its button. In this way, the overload protection module will not be frequently turned on and off in a short period of time, which is beneficial to protecting the overload protection module. This is because, since the technician presses the button 401 of the reset mechanism, it means that the circuit where the overload protection module is located has been repaired and restored to normal, so the overload power outage will basically not occur again in a short period of time.

[0210] Because the reset button is usually in the middle, refer to Figure 12 As shown, the top of the push rod 5 is roughly in the middle of the front-to-back direction of the bottom shell 31. The second connecting piece 42 of the deformation piece 4 and the connecting piece 22 of the second wiring structure 2 are at one end of the front-to-back direction of the bottom shell 31. Figure 14 As shown, the spacer 523 is located at the bottom of the push rod 5 and extends to the side away from the axial center line of the push rod 5.

[0211] For example, refer to Figure 14 As shown, the outer surface of the side wall of the push rod 5 has a first side rib 521, and the spacer 523 is located at the bottom of the first side rib 521 and extends to the side away from the axial center line of the push rod 5. The length direction of the first side rib 521 extends along the axial center line of the push rod 5. For example, the bottom end of the first side rib 521 extends beyond the bottom end of the push rod 5, so that the spacer 523 is located at the bottom.

[0212] The first side rib 521 is used, on the one hand, to extend the spacer 523 to the side away from the axial center line of the push rod 5 , and on the other hand, to be clamped in the bottom shell 31 .

[0213] For example, referring to Figure 15 as shown, in the bottom case 31 and at a position close to the first side wall 311, there is a channel 314 for restricting the elastic member 6 therein to prevent the elastic member 6 from moving laterally during the telescopic movement. There is a first channel opening 3141 on the channel wall of the channel 314, and the first channel opening 3141 extends from the top end to the bottom end of the channel 314. For example, the first channel opening 3141 penetrates the height of the channel wall of the channel 314. Of course, the first channel opening 3141 also penetrates the channel wall thickness of the channel 314. Then, referring to Figure 15 as shown, the first side rib 521 can be snapped into the first channel opening 3141, and the spacer 523 is located outside the channel 314.

[0214] Referring to Figure 15 as shown, in order to quickly insert the first side rib 521 into the first channel opening 3141, correspondingly, the bottom end of the first side rib 521 has a guiding structure.

[0215] Continuing to refer to Figure 14 as shown, the side part of the push rod 5 also has a second side rib 522, and the length of the second side rib 522 extends along the axial center line of the push rod 5. For example, the bottom end of the second side rib 522 extends out of the bottom end of the push rod 5.

[0216] Among them, the second side rib 522 is mainly used for snap-fitting in the bottom case 31.

[0217] For example, referring to Figure 15 as shown, there is a second channel opening 3142 on the channel wall of the channel 314, and the second channel opening 3142 extends from the top end to the bottom end of the channel 314. For example, the second channel opening 3142 penetrates the height of the channel wall of the channel 314. Of course, the second channel opening 3142 also penetrates the channel wall thickness of the channel 314. Then, referring to Figure 15 as shown, the second side rib 522 can be snapped into the second channel opening 3142.

[0218] Referring to Figure 15 as shown, in order to quickly insert the second side rib 522 into the second channel opening 3142, correspondingly, the bottom end of the second side rib 522 has a guiding structure.

[0219] Since the bottom case 31 is located between the first pole jack 201 and the second pole jack 202, and the width between the first pole jack 201 and the second pole jack 202 is limited, therefore, in order to make the width of the bottom case 31 relatively narrow, correspondingly, referring to Figure 15As shown, the first side rib 521 and the second side rib 522 are roughly arranged in front and back in the front-to-back direction. For example, in the front-to-back direction, the first side rib 521 is in front and the second side rib 522 is in the back. Compared with the first side rib 521 and the second side rib 522 being distributed left and right in the width direction, the width of the bottom shell 31 can be shortened.

[0220] As described above, the channel 314 in the bottom shell 31 is close to the first side wall 311, and the top end of the push rod 5 is located in the middle between the first side wall 311 and the second side wall 312, wherein the first side wall 311 and the second side wall 312 are located opposite to each other. Figure 14 As shown, the rod portion of the push rod 5 may include a first rod portion 51 and a second rod portion 52, the second rod portion 52 is located at the bottom of the first rod portion 51, and the axial center line of the first rod portion 51 is parallel to but not coincident with the axial center line of the second rod portion 52. After the push rod 5 is installed in the bottom shell 31, the second rod portion 52 is closer to the first side wall 311 than the first rod portion 51, and the first rod portion 51 is approximately located at the middle position between the first side wall 311 and the second side wall 312.

[0221] Since the first rod portion 51 and the second rod portion 52 are distributed in a direction perpendicular to the first side wall 311 and the spacer 523 extends in a direction parallel to the first side wall 311 , the plane where the axial center line of the first rod portion 51 and the axial center line of the second rod portion 52 are located is perpendicular to the plane where the spacer 523 is located.

[0222] Based on the fact that the second rod portion 52 is at the bottom of the first rod portion 51, and the button 401 is at the top of the push rod 5, the spacer 523 is at the bottom of the push rod 5, and the elastic member 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31, the top of the first rod portion 51 is the button 401, the spacer 523 is arranged at the bottom of the second rod portion 52, and extends to the side away from the axial center line of the second rod portion 52, and the elastic member 6 is compressed between the bottom of the second rod portion 52 and the bottom of the bottom shell 31.

[0223] Based on the elastic member 6 being restricted in the channel 314 of the bottom shell 31, as shown in FIG. Figure 15 And refer to Figure 16 As shown, the second rod portion 52 for pressing the elastic member 6 can extend into the channel 314. Then, the elastic member 6 is arranged in the channel 314, the first side rib 521 and the second side rib 522 are respectively inserted into the first channel opening 3141 and the second channel opening 3142, and the second rod portion 52 extends into the channel 314 to press the elastic member 6. When the push rod 5 is pushed to the bottom, it is assembled in the bottom shell 31.

[0224] refer to Figure 15As shown, the second rod portion 52 extends into the channel 314, which is conducive to quickly loading the push rod 5 into the bottom case 31 and facilitating automated assembly. This is because the cylindrical second rod portion 52 and the channel 314 with a cylindrical inner surface can achieve circumferential pre-positioning. As long as the second rod portion 52 enters the channel 314, the first side rib 521 can be snapped into the first channel opening 3141, the second side rib 522 can be snapped into the second channel opening 3142, and the spacer 523 can be snapped into the fourth card slot 319.

[0225] Reference Figure 8 As shown, there is a channel 314 between the deformation sheet 4 and the first side wall 311. A spacing of width H needs to be reserved between the deformation sheet 4 and the second side wall 312 to allow the second connecting piece 42 of the deformation sheet 4 to bend and deform towards the second side wall 312. The first rod portion 51 of the push rod 5 is located at the middle position between the first side wall 311 and the second side wall 312. The bottom case 31 is restricted between the first pole jack 201 and the second pole jack 202. For this reason, reference Figure 15 As shown, the first rod portion 51 has a first cutting plane 511 on the side opposite to the second rod portion 52. The first cutting plane 511 is parallel to the first side wall 311 and extends from the bottom end of the first rod portion 51 to the top end of the first rod portion 51, but does not extend to the top end of the first rod portion 51 (because the top end of the first rod portion 51 still needs to serve as the button 401).

[0226] The side of the channel 314 opposite to the first side wall 311 has a second cutting plane 3143. The second cutting plane 3143 is parallel to the first side wall 311 and penetrates the height of the channel 314.

[0227] Then, reference Figure 12 As shown, the deformation sheet 4 can be located at the first cutting plane 511 and the second cutting plane 3143. After the deformation sheet 4 is installed in the bottom case 31, in the thickness direction, the sum of the heights of the first cutting plane 511 and the second cutting plane 3143 satisfies being greater than the height of the third connecting piece 43 of the deformation sheet 4, so that the top end of the deformation sheet 4 at the third connecting piece 43 does not contact the cutting plane of the first rod portion 51 perpendicular to the first cutting plane 511, so as to prevent the cutting plane of the first rod portion 51 perpendicular to the first cutting plane 511 from interfering with the bending deformation of the second connecting piece 42 of the deformation sheet 4.

[0228] Since the third connecting piece 43 of the deformation sheet 4 is located at the first cutting plane 511 and the second cutting plane 3143, and the third connecting piece 43 has a planar region, the first cutting plane 511 and the second cutting plane 3143 are coplanar and on the same plane.

[0229] Continue to reference Figure 12As shown, after the deformation sheet 4 and the push rod 5 are installed in the bottom shell 31, the top ends of the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 are flush with or retracted from the top end of the bottom shell 31, the top ends of the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 22 of the second wiring structure 2 are flush with or retracted from the top end of the bottom shell 31, the top end of the third connecting sheet 43 of the deformation sheet 4 is higher than the top end of the bottom shell 31, and the top end of the push rod 5 is also higher than the top end of the bottom shell 31. In this height relationship, refer to Figure 9 As shown, the shape of the upper cover 32 is low at both ends and high in the middle.

[0230] Continue to refer to Figure 9 As shown, the upper cover 32 is also provided with a sleeve 33. The sleeve 33 penetrates the thickness of the upper cover 32 and communicates with the space inside the bottom shell 31. The top end of the push rod 5 extends into the sleeve 33. For example, the first rod portion 51 of the push rod 5 extends into the sleeve 33. Moreover, when the push rod 5 is in the pressed state, the top end of the push rod 5 is flush with or extends out of the sleeve 33.

[0231] In order to facilitate the user to press the top end of the push rod 5, correspondingly, refer to Figure 1 As shown, the top end of the sleeve 33 is flush with the top surface of the plug housing 100. Then, the top end of the push rod 5 located in the sleeve 33 is exposed above the top surface of the plug housing 100.

[0232] Based on the fact that the top end of the sleeve 33 is flush with or extends out of the top surface of the plug housing 100, the height of the sleeve 33 is related to the height of the plug housing 100. For example, if the plug housing 100 is in the shape as Figure 1 shown, then refer to Figure 3 shown, the height of the sleeve 33 is relatively small. Another example is that if the plug housing 100 is in the shape as Figure 25 shown, then refer to Figure 26 shown, the height of the sleeve 33 is relatively high.

[0233] Based on the above, when the deformation sheet 4 deforms, the second connecting sheet 42 springs open relative to the connecting sheet 22 of the second wiring structure 2, and the spacer 523 of the push rod 5 moves up to contact the static contact on the connecting sheet 22 of the second wiring structure 2. When the push rod 5 is pressed, the spacer 523 of the push rod 5 moves down to the bottom of the bottom shell 31. In this way, the push rod 5 can slide up and down along the thickness direction.

[0234] The first side rib 521 and the second side rib 522 of the push rod 5 are respectively located in the first channel opening 3141 and the second channel opening 3142, and the first rod portion 51 of the push rod 5 is located in the sleeve 33 near the top end. Then, during the up and down sliding movement of the push rod 5 along the thickness direction, limited by the first channel opening 3141, the second channel opening 3142 and the sleeve 33, the push rod 5 is not prone to shaking during the up and down sliding movement.

[0235] Further, as Figure 15 and referring to Figure 16 shown, the bottom of the bottom shell 31 has a fourth card slot 319 for restricting the spacer 523. During the downward movement of the spacer 523, it is snapped into the fourth card slot 319, and the shaking of the spacer 523 is restricted by the fourth card slot 319.

[0236] Continuing to refer to that shown in 15, the notch shape of the fourth card slot 319 is in a flared shape, so that during the process of pressing the button 401 (i.e., the top end of the push rod 5), the spacer 523 can be smoothly snapped into the fourth card slot 319, making it difficult for the button 401 to get stuck.

[0237] Since the elastic member 6 is compressed between the second rod portion 52 of the push rod 5 and the bottom of the bottom shell 31, then, during assembly, if the elastic member 6 is installed first, the elastic member 6 will push the push rod 5 open, which brings certain difficulties to the assembly and is not easy to achieve automated assembly. Correspondingly, the elastic member 6 can be installed into the bottom shell 31 after the upper cover 32 of the bottom shell 31 and the bottom shell 31 are assembled. Correspondingly, as Figure 17 shown, the bottom of the bottom shell 31 has an installation opening 315 at the position corresponding to the channel 314. After the upper cover 31 and the bottom shell 31 are fixed, the overload protection module is inverted, and the elastic member 6 is inserted into the channel 314 inside the bottom shell 31 from the installation opening 315 at the bottom of the bottom shell 31, and then the plugging block 7 is used to plug the installation opening 315. At this time, the elastic member 6 is compressed between the push rod 5 and the plugging block 7.

[0238] Since the bottom of the bottom shell 31 is fixed in the plug housing 100, even if the interference effect between the plugging block 7 and the installation opening 315 is weak, the elastic member 6 will not fall off from the installation opening 315 at the bottom of the bottom shell 31.

[0239] In one example, in order to enable the plugging block 7 to be interference-fitted into the installation opening 315, the plugging block 7 can be compressed and thus inserted into the installation opening 315. For example, the plugging block 7 can be a rubber plug, which has a certain elasticity and can be compressed to be inserted into the installation opening 315.

[0240] Referring again to Figure 18 shown, the inner end surface of the plugging block 7 facing the channel 314 has a groove 71, and the notch of the groove 71 faces the elastic member 6, and the elastic member 6 abuts against the end surface where the notch of the groove 71 is located. The groove 71 can enable the plugging block 7 to shrink when inserted into the installation opening 315, so as to be interference-fitted into the installation opening 315.

[0241] Continuing to refer to Figure 17 and Figure 18 shown, an annular rib 316 is arranged on the outer surface of the bottom of the bottom shell 31 along the installation opening 315, and the annular rib 316 is used to extend the axial length of the installation opening 315.

[0242] In order to enable the plug 7 to be inserted into the inner space of the annular rib 316, as shown in Figure 17 shown, the annular rib 316 has a plurality of openings 3161 penetrating through the thickness and height of the annular rib 316. These openings 3161 are used to reduce the stiffness of the annular rib 316, and these openings 3161 can be evenly arranged along the circumferential direction. Then, when inserting the plug 7, the annular rib 316 is radially expanded, so as to insert the plug 7 into the mounting opening 315 and the annular rib 316.

[0243] Wherein, the height direction of the annular rib 316 is the direction perpendicular to the bottom of the bottom shell 31, and the thickness direction is the direction parallel to the radial direction of the mounting opening 315.

[0244] In one example, since the elastic member in the compressed state abuts against the plug 7, the plug 7 may fall off from the inner ring of the mounting opening 315 and the annular rib 316 under the action of the elastic member. For this reason, in order to prevent the plug 7 from falling off from the annular rib 316 and the opening, correspondingly, as shown in Figure 18 shown, the aperture diameter of the mounting opening 315 and the inner diameter of the annular rib 316 gradually increase from the outside of the bottom shell 31 to the inside of the bottom shell 31 in the axial direction of the mounting opening 315, and the diameter of the plug 7 gradually increases from the outside of the bottom shell 31 to the inside of the bottom shell 31 in the axial direction of the plug 7. Thus, as shown in Figure 18 shown, the cross-sectional shape of the plug 7 is an inverted trapezoid, and the plug 7 is blocked in the annular rib 316 and the mounting opening 315 like a barb, making the plug not easy to fall off.

[0245] As shown in Figure 17 shown, the shape of the mounting opening 315 is a circular hole. Then, the shapes of the two end faces of the plug 7 along the circumferential center line are also circular. Also, since the cross-sectional shape of the plug 7 is an inverted trapezoid, thus, the shape of the plug 7 is a frustum of a cone. A frustum of a cone is the part between the bottom surface of the cone and the cross-section when a plane parallel to the bottom surface of the cone cuts the cone. Then, as shown in Figure 18 shown, for the frustum-of-cone-shaped plug 7, its bottom surface faces the channel 314 of the bottom shell 31, the elastic member 6 abuts against the bottom surface, and the cross-section of the plug 7 faces the outside of the bottom shell 31. For example, it is flush with or retracted from the outer end face of the annular rib 316.

[0246] In this way, as shown in Figure 18 shown, when the plug 7 is subjected to the downward acting force of the elastic member 6, it also receives the upward supporting force from the annular rib 316. The annular rib 316 functions to resist the elastic member, making the plug 7 not easy to fall off.

[0247] In one example, in order to smoothly insert the plug 7 into the annular rib 316 and the opening, correspondingly, referring to Figure 18 As shown, the annular rib 316 has a first guiding structure at the opening away from the channel 314 (that is, there is a guide angle between the end face and the inner surface of the annular rib 316), and the plug 7 has a second guiding structure at one end close to the installation groove (that is, there is a guide angle between the bottom surface and the side surface of the plug 7). Then, under the cooperation of the first guiding structure and the second guiding structure, and under the cooperation of the annular rib 316 expanding along the radial direction, and under the shrinkage of the plug 7, the plug 7 is press-fitted into the channel formed by the inner surface of the installation port 315 and the inner surface of the annular rib 316.

[0248] In one example, referring to Figure 17 As shown, since the annular rib 316 protrudes from the bottom outer surface of the housing 61, in order to stably fix the overload protection module on the plug bracket 200, correspondingly, the inner surface of the plug bracket 200 has a sunk groove 205 (which can be referred to Figure 2 As shown), the overload protection module is fixed on the plug bracket 200, and the annular rib 316 is located in the sunk groove 205, so that the bottom outer surface of the overload protection module can be stably attached to the inner surface of the plug bracket 200.

[0249] In addition, referring to Figure 17 As shown, the outer surface of the annular rib 316 forms a cylindrical surface, then, the inner surface of the sunk groove 205 on the first surface of the plug bracket 200 also forms a cylindrical surface.

[0250] In order to stably fix the bottom shell 31 on the first surface of the plug bracket 200, correspondingly, the height of the annular rib 316 protruding from the outer surface of the bottom shell 31 is less than or equal to the depth of the sunk groove 205.

[0251] The above are the structural features of the overload protection module. Next, based on the features of the overload protection module, the assembly process of the overload protection module will be introduced.

[0252] Step 1, insert the push rod 5 into the bottom shell 31.

[0253] Referring to Figure 15 and Figure 16 As shown, align the second rod portion 52 of the push rod 5 with the channel 314, insert the first side rib 521 into the first channel opening 3141 of the channel 314, and insert the second side rib 522 into the second channel opening 3142 of the channel 314. As the push rod 5 continues to slide, the second rod portion 52 of the push rod 5 extends into the channel 314. When the push rod 5 is pushed to the bottom in the bottom shell 31, the spacer 523 at the bottom of the push rod 5 is located in the fourth card slot 319, and the bottom end of the spacer 523 contacts the bottom surface of the bottom shell 31.

[0254] Step 2: Install the fixed deformation piece 4 and the first wiring structure 1 into the bottom shell 31.

[0255] Specifically, referring to Figure 19 and Figure 20 as shown, after fixing the first connecting piece 41 of the deformation piece 4 and the connecting piece 12 of the first wiring structure 1, install them together into the third card slot 313, and the transition piece 13 of the first wiring structure 1 is snapped into the first card slot 3111.

[0256] Among them, the fixing step of the first connecting piece 41 of the deformation piece 4 and the connecting piece 12 of the first wiring structure 1 can be carried out before Step 1, or after Step 1 and before Step 2.

[0257] Step 3: Install the second wiring structure 2 into the bottom shell 31.

[0258] Specifically, as Figure 21 and referring to Figure 22 shown, snap the card slot 231 on the transition piece 23 of the second wiring structure 2 into the second card slot 3112 on the first side wall 311. When inserted to the bottom, the assembly of the second wiring structure 2 in the bottom shell 31 is completed.

[0259] Step 4: As Figure 22 shown, install the upper cover 32 of the module housing 3 on the top end of the bottom shell 31.

[0260] Specifically, referring to Figure 22 shown, insert some second positioning structures 323 (such as cylinders) at the bottom end of the upper cover 32 into some first positioning structures 317 (such as square holes) at the top end of the bottom shell 31 one by one, and the assembly of the upper cover 32 and the bottom shell 31 is completed. After the upper cover 32 and the bottom shell 31 are assembled, referring to Figure 9 shown, the first convex structure 321 at the bottom of the upper cover 32 presses against the top end of the transition piece 13 of the first wiring structure 1, and the second convex structure 322 at the bottom of the upper cover 32 presses against the top end of the transition piece 23 of the second wiring structure 2.

[0261] Step 5: Install the elastic member 6 into the bottom shell 31 from the installation opening 315 at the bottom of the bottom shell 31.

[0262] Specifically, first turn the overload protection module upside down, referring to Figure 23 shown, with the bottom of the bottom shell 31 facing up and the top of the upper cover 32 facing down, and then install the elastic member 6 into the bottom shell 31 from the installation opening 315 at the bottom of the bottom shell 31.

[0263] Step 6: Referring to Figure 24 shown, plug the plug 7 into the installation opening 315 to compress the elastic member 6 installed in the installation opening 315 in the bottom shell 31.

[0264] As can be seen from the above, the overload protection module mostly involves snap-in during assembly, and the assembly process is relatively simple, which is conducive to realizing automated assembly and improving assembly efficiency.

[0265] It should be pointed out that, since the thickness of the deformable sheet 4 is relatively thin and has a certain elasticity, the deformable sheet 4 and the first wiring structure 1 can be first installed into the bottom shell as a whole, and then the push rod 5 can be installed into the bottom shell. Then, when installing the push rod 5, the second wiring terminal 42 of the deformable sheet 4 needs to be broken apart so that the partition 523 of the push rod 5 moves down to contact the inner surface of the bottom shell 31.

[0266] After the overload protection module is assembled, the overload protection module is mounted on the first surface of the latch bracket 200. Figure 2 As shown, the first surface of the latch bracket 200 has a circular recessed groove 205 and a plurality of fourth positioning structures 206, and the reference Figure 24 As shown, the bottom of the overload protection module has an annular rib 316 and a plurality of third positioning structures 318. Then, the annular rib 316 at the bottom of the overload protection module is inserted into the sink 205, and the plurality of fourth positioning structures 206 cooperate with the corresponding third positioning structures 318 one by one. Figure 4 As shown, the overload protection module is assembled on the first surface of the latch bracket 200 .

[0267] The third positioning structure 318 may be a square hole, and the fourth positioning structure 206 may be a cylinder, or the third positioning structure 318 is a cylinder, and the fourth positioning structure 206 is a square hole. The square hole has a guide structure, and the end face of the cylinder is spherical, so as to achieve rapid assembly and improve assembly efficiency.

[0268] After the overload protection module 400 is assembled on the first surface of the latch bracket 200, Figure 3 On the basis of what is shown, an encapsulation process is performed to form the plug housing 100 .

[0269] The shape of a plug housing 100 can refer to Figure 1 As shown, it is a flat columnar structure, which encloses the latch bracket 200 and the overload protection module 400, and the latch components are extended out of the plug housing 100, and the button 401 of the overload protection module 400 is exposed on the top surface of the plug housing 100, for example, the button 401 is basically flush with the top surface of the plug housing 100.

[0270] Continue to refer Figure 1 As shown, the left and right sides of the plug housing 100 have cut surfaces that are symmetrical about the center line, and these two cut surfaces are used to facilitate users to take the plug.

[0271] Another shape of the plug housing 100 is shown in FIG.Figure 25 As shown, the plug housing 100 mainly includes two parts. One part wraps the pin bracket, and the other part wraps the overload protection module 400. The part that wraps the pin bracket 200 is called the horizontal part, and the part that wraps the overload protection module 400 is called the vertical part.

[0272] In one example, in order to adapt to the height of the plug housing 100 as shown Figure 25 As shown, for the height of the plug housing 100, referring to Figure 26 As shown, the sleeve 33 at the top of the module housing 3 of the overload protection module 400 has an axis perpendicular to the pin bracket 200. The top end of the push rod 5 extends out of the sleeve 33. The sleeve 33 has a relatively high height to extend the height of the plug in the thickness direction.

[0273] Continuing to refer to Figure 25 As shown, the left and right sides of the vertical part of the plug housing 100 have bulging structures 101. The bulging structures 101 on both sides of the vertical part are symmetrically distributed about the center line of the plug, which is convenient for users to pick up the plug.

[0274] It should be noted that the length of the bulging structure 101 in the front-back direction of the plug is related to the length dimension L occupied in the front-back direction by the part of the first wiring structure 1 on one side of the overload protection module 400 that extends out of the module housing 3 and the part of the second wiring structure 2 that extends out of the module housing 3. Among them, the length dimension L occupied by the first wiring structure 1 and the second wiring structure 2 in the front-back direction can be referred to Figure 26 As shown.

[0275] Continuing to refer to Figure 26 As shown, the outer surface of the bulging structure 101 has a cylindric surface that is recessed inward, which is convenient for users to pick up.

[0276] In the embodiments of the present disclosure, an overload protection module is integrated in the plug. When the current in the circuit where the plug is located is too large, the overload protection module disconnects the circuit where the plug is located to improve the electrical safety. Moreover, since the overload protection module is integrated in the plug, there is no need to arrange an overload protection module in the socket into which the plug is inserted. In this way, the internal space of the socket can be saved, and more jacks can be arranged in the socket.

[0277] Moreover, the overload protection module is integrated in the originally existing idle area between the first-pole pin and the second-pole pin of the plug, realizing the integration of the overload protection module in the plug with basically no change in the shape and size of the plug.

[0278] The above are only the preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A plug, characterized in that: It comprises a plug housing (100), a latch bracket (200), a latch assembly and an overload protection module (400); The latch bracket (200) has a first pole plug hole (201) and a second pole plug hole (202) located on both sides of a center line, and the latch assembly comprises a first pole plug pin (301) and a second pole plug pin (302), wherein the first pole plug pin (301) is fixed in the first pole plug hole (201), and the second pole plug pin (302) is fixed in the second pole plug hole (202); The latch bracket (200) and the overload protection module (400) are both located in the plug housing (100); the overload protection module (400) is fixed to a first surface of the latch bracket (200) and is located between the first pole plug hole (201) and the second pole plug hole (202); The overload protection module (400) comprises a first wiring structure (1) and a second wiring structure (2), wherein the first wiring structure (1) is electrically connected to the first pole plug (301), the second wiring structure (2) is used to electrically connect to a first pole conductor of a power line extending into the plug housing (100), and the second pole plug (302) is used to electrically connect to a second pole conductor of the power line.

2. The plug according to claim 1, characterized in that: The plug assembly further comprises a third-pole plug (303), the plug bracket (200) further comprises a third-pole plug hole (203) located on the center line, the third-pole plug (303) is fixed in the third-pole plug hole (203) and extends out of the plug housing (100); The overload protection module (400) is located between the third pole socket (203) and a first position of the latch bracket (200), wherein the first position is located on an edge of the latch bracket (200) and on a center line of the latch bracket (200).

3. The plug according to claim 2, characterized in that: The latch bracket (200) has a power cord bracket (204) at the first position for supporting a power cord extending into the plug housing (100); The power cord bracket (204) comprises a transverse portion and a vertical portion which are vertically connected, the transverse portion being fixed at a first position of the latch bracket (200), and the vertical portion having a power cord hole (2041), the power cord hole (2041) being used for allowing the power cord to pass through.

4. The plug according to claim 3, characterized in that: The top end of the vertical portion away from the horizontal portion has an opening, the opening is connected to the power cord hole (2041), and the opening is used for the power cord to be inserted into the power cord hole (2041).

5. The plug according to claim 4, characterized in that: The portion of the opening away from the power cord hole (2041) is in a trumpet shape.

6. The plug according to claim 2, characterized in that: The second-pole plug (302) and the third-pole plug (303) both have a wiring terminal extending from the first surface of the plug bracket (200), the second wiring structure has a wiring terminal, the wiring terminal of the second-pole plug (302) is used to connect to the second-pole wire of the power line, the wiring terminal of the third-pole plug (303) is used to connect to the third-pole wire of the power line, and the wiring terminal of the second wiring structure is used to connect to the second-pole wire of the power line; The connection terminal of the second pole plug (302), the connection terminal of the third pole plug (303) and the connection terminal of the second connection structure (2) are all cylindrical in shape, and the axial center lines are perpendicular to the plug bracket (200); The connection terminal of the second pole plug (302), the connection terminal of the third pole plug (303) and the connection terminal of the second connection structure (2) all have an opening penetrating the thickness of the cylinder wall, and the opening on the connection terminal of the second pole plug (302) and the opening on the connection terminal of the second connection structure (2) are both on a straight line parallel to the center line of the plug bracket, and the opening on the connection terminal of the third pole plug (303) is on a straight line perpendicular to the center line of the plug bracket.

7. The plug according to claim 1, characterized in that: The first wiring structure (1) and the second wiring structure (2) both extend out of a module housing (3) of the overload protection module (400); The portion of the first wiring structure (1) extending out of the module housing (3), the portion of the second wiring structure (2) extending out of the module housing (3) and the first pole plug (301) are located on the same side of the module housing (3).

8. The plug according to claim 7, characterized in that: In a direction parallel to the center line of the latch bracket (200), the second wiring structure (2) is farther away from the power line than the first wiring structure (1).

9. The plug according to claim 1, characterized in that: The first wiring structure (1) has a wiring terminal extending out of the module housing (3) of the overload protection module (400), the wiring terminal of the first wiring structure (1) being connected to the first pole plug (301), and the second wiring structure (2) has a wiring terminal extending out of the module housing (3), the wiring terminal of the second wiring structure (2) being used to be connected to the first pole conductor of the power line; In a direction perpendicular to the latch bracket (200), the wiring terminal of the first wiring structure (1) is located between the wiring terminal of the second wiring structure (2) and the first surface of the latch bracket (200).

10. The plug according to claim 1, characterized in that The overload protection module (400) has a button (401), and the button (401) is exposed on the top of the plug housing (100); When the button (401) is in a pressed state, the first wiring structure (1) and the second wiring structure (2) are in a connected state; when the button (401) is in a pop-up state, the first wiring structure (1) and the second wiring structure (2) are in a disconnected state.

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