Overload protection module and plug

Abstract

The utility model relates to an overload protection module and a plug, and belongs to the technical field of power supplies. The overload protection module comprises a module shell, a first wiring structure, a second wiring structure, a deformation sheet, a reset mechanism and a sealing plug; each of the first wiring structure and the second wiring structure comprises a connecting piece located in the module shell and a wiring end located outside the module shell; the deformation sheet and the reset mechanism are both located in the module shell and used for electrically connecting and disconnecting the first wiring structure and the second wiring structure; the reset mechanism comprises a push rod and an elastic piece, the push rod is located in the module shell, an installation opening is formed in the position, corresponding to the push rod, of the bottom of the module shell, the elastic piece is installed in the module shell through the installation opening, the installation opening is blocked by the blocking plug, and the elastic piece is compressed between the push rod and the blocking plug. According to the invention, the electricity utilization safety can be improved.

Description

[0001] The present application claims priority to the Chinese patent application No. 202411427204.3, filed on October 12, 2024, and entitled "Plug", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of power supply, in particular to an overload protection module and a plug. BACKGROUND

[0003] With the improvement of people's living standards, people's demand for electricity is growing, and as a common power supply device at home, the safety of the plug and socket is also increasingly valued by people.

[0004] With the continuous enrichment of electrical equipment, users often inadvertently overload during the use of the socket. When the socket is overloaded, it may cause a fire, which is very dangerous. Therefore, researchers in the industry have been working to develop a safer power supply device. CONTENT OF THE INVENTION

[0005] In order to solve the problems of the prior art, the present disclosure provides an overload protection module and a plug. The technical solution is as follows:

[0006] In a first aspect, the present disclosure provides an overload protection module, which comprises a module housing, a first wiring structure, a second wiring structure, a deformation sheet, a reset mechanism and a blocking plug.

[0007] The first wiring structure and the second wiring structure are both partially located in the module housing and partially extend out of the module housing, and the deformation sheet and the reset mechanism are both located in the module housing, for electrically connecting and disconnecting the first wiring structure and the second wiring structure.

[0008] The reset mechanism comprises a push rod and an elastic member, the module housing comprises a bottom shell and an upper cover, the push rod is loaded into the bottom shell through an opening at the top of the bottom shell, the bottom of the bottom shell has a mounting port at a position corresponding to the push rod, the elastic member is loaded into the bottom shell through the mounting port, and the blocking plug is blocked in the mounting port, and the elastic member is compressed between the push rod and the blocking plug.

[0009] Optionally, the shape of the blocking plug is a truncated cone, the inner surface of the mounting port is in contact with the outer surface of the blocking plug, and the bottom surface of the blocking plug faces the inside of the bottom shell, and the cross section of the blocking plug faces the outside of the bottom shell.

[0010] Optionally, the bottom surface and the side surface of the blocking plug have a lead angle therebetween.

[0011] Optionally, the bottom surface of the plug has a groove, and the groove has a groove opening on the bottom surface of the plug.

[0012] Optionally, the bottom surface of the plug has a groove, and the groove has a groove opening on the bottom surface of the plug.

[0013] The inner surface of the mounting hole and the inner surface of the annular rib are in contact with the outer surface of the plug.

[0014] Optionally, the inner surface of the annular rib and the outer end surface outside the bottom shell have a guide angle therebetween.

[0015] Optionally, the annular rib has a plurality of openings penetrating through the annular rib wall thickness.

[0016] Optionally, the outer surface of the annular rib is a cylindrical surface.

[0017] Optionally, the annular rib is used to be fitted into a sink groove on the surface of the latch support of the overload protection module, and the height of the annular rib is less than or equal to the groove depth of the sink groove.

[0018] In a second aspect, a plug is provided, which comprises a plug shell, a latch support, a latch assembly, and the overload protection module of any one of the first aspect.

[0019] The latch support has a first pole socket and a second pole socket on both sides of a center line, the latch assembly comprises a first pole latch and a second pole latch, the first pole latch is fixed in the first pole socket, and the second pole latch is fixed in the second pole socket.

[0020] The latch support and the overload protection module are located in the plug shell, the overload protection module is fixed on the first surface of the latch support and located between the first pole socket and the second pole socket, the bottom outer surface of the module shell and the plug are both facing the latch support.

[0021] The overload protection module is electrically connected to the first pole wire of the power cord through the wiring ends of the first wiring structure and the second wiring structure outside the module shell.

[0022] In the scheme shown in the present disclosure, the elastic member compressed between the bottom of the module shell and the push rod is fitted from the bottom of the bottom shell after the push rod, compared with being fitted from the top of the bottom shell before the push rod, the situation that the elastic member pushes the push rod away does not occur, the assembly of the overload protection module is simplified, and the assembly efficiency is improved.

[0023] Moreover, the overload protection module is integrated in the plug. When the current on the circuit where the plug is located is too large, the overload protection module disconnects the circuit where the plug is located, so as to improve the safety of electricity use. Moreover, the overload protection module is integrated in the plug, so that the overload protection module does not need to be arranged in the socket where the plug is inserted, thereby saving the internal space of the socket and enabling the socket to arrange more plug holes. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0025] Figure 1 is a structural schematic diagram of a plug provided by an example embodiment of the present disclosure;

[0026] Figure 2 is a structural schematic diagram of a plug pin support provided by an example embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram before an overload protection module is arranged on a first surface of a plug pin support provided by an example embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of an overload protection module and a plug pin assembly installed on a plug pin support provided by an example embodiment of the present disclosure;

[0029] Figure 5 is another display perspective schematic diagram of an overload protection module and a plug pin assembly installed on a plug pin support provided by an example embodiment of the present disclosure;

[0030] Figure 6 is a schematic diagram of a second wiring structure before and after formation provided by an example embodiment of the present disclosure;

[0031] Figure 7 is a split schematic diagram of a deformation sheet, a first wiring structure and a second wiring structure before being arranged in a module shell provided by an example embodiment of the present disclosure;

[0032] Figure 8 is a schematic diagram of a deformation sheet, a first wiring structure and a second wiring structure after being arranged in a bottom shell provided by an example embodiment of the present disclosure;

[0033] Figure 9 is a structural schematic diagram of an overload protection module provided by an example embodiment of the present disclosure;

[0034] Figure 10is a cross-sectional view of the deformation sheet, the first wiring structure, and the second wiring structure taken along the front-rear direction after being fitted into the bottom case according to an example embodiment of the present disclosure;

[0035] Figure 11 is a structural view of the deformation sheet according to an example embodiment of the present disclosure;

[0036] Figure 12 is a cross-sectional view of the deformation sheet, the first wiring structure, the second wiring structure, and the push rod taken along the front-rear direction after being fitted into the bottom case according to an example embodiment of the present disclosure;

[0037] Figure 13 is a structural view of the reset mechanism according to an example embodiment of the present disclosure;

[0038] Figure 14 is a structural view of the push rod according to an example embodiment of the present disclosure;

[0039] Figure 15 is a cross-sectional view of the push rod taken along the front-rear direction before being fitted into the bottom case according to an example embodiment of the present disclosure;

[0040] Figure 16 is a cross-sectional view of the push rod taken along the front-rear direction after being fitted into the bottom case according to an example embodiment of the present disclosure;

[0041] Figure 17 is a structural view of the bottom of the bottom case according to an example embodiment of the present disclosure;

[0042] Figure 18 is a view of the elastic member and the stopper being fitted into the bottom case according to an example embodiment of the present disclosure;

[0043] Figure 19 is a view of the fixed deformation sheet and the first wiring structure before being fitted into the bottom case according to an example embodiment of the present disclosure;

[0044] Figure 20 is a view of the fixed deformation sheet and the first wiring structure after being fitted into the bottom case according to an example embodiment of the present disclosure;

[0045] Figure 21 is a view of the second wiring structure before being fitted into the bottom case according to an example embodiment of the present disclosure;

[0046] Figure 22 is a view of the upper cover before being fitted to the bottom case according to an example embodiment of the present disclosure;

[0047] Figure 23 is a view of the elastic member being fitted into the bottom case from the installation port of the bottom of the bottom case according to an example embodiment of the present disclosure;

[0048] Figure 24 is a schematic view of the plug inserted into the installation port provided by one exemplary embodiment of the present disclosure;

[0049] Figure 25 is a schematic view of another plug housing provided by one exemplary embodiment of the present disclosure;

[0050] Figure 26 is a schematic view of another overload protection module provided by one exemplary embodiment of the present disclosure.

[0051] BRIEF DESCRIPTION OF DRAWINGS

[0052] 100, plug housing; 101, bulge structure on the plug housing.

[0053] 200, plug pin holder; 201, first pole plug hole; 202, second pole plug hole; 203, third pole plug hole; 204, power cord holder; 205, sink groove; 206, fourth positioning structure.

[0054] 2041, power cord hole; 2042, opening on the power cord holder.

[0055] 301, first pole plug pin; 302, second pole plug pin; 303, third pole plug pin.

[0056] 3011, wiring end of the first pole plug pin; 3021, wiring end of the second pole plug pin; 3031, wiring end of the third pole plug pin.

[0057] 400, overload protection module; 401, button.

[0058] 1, first wiring structure; 11, wiring end of the first wiring structure; 12, connecting piece of the first wiring structure; 13, transition piece of the first wiring structure.

[0059] 2, second wiring structure; 21, wiring end of the second wiring structure; 22, connecting piece of the second wiring structure; 23, transition piece of the second wiring structure.

[0060] 211, opening on the second wiring structure; 212, bayonet on the second wiring structure; 213, protruding structure on the second wiring structure; 231, clamping groove on the second wiring structure.

[0061] 3, module housing; 31, bottom shell; 32, upper cover; 33, sleeve.

[0062] 311, first side wall; 312, second side wall; 313, third clamping groove; 314, passage; 315, installation port; 316, annular protruding rib; 317, first positioning structure; 318, third positioning structure; 319, fourth clamping groove.

[0063] 3111, first clamping groove; 3112, second clamping groove; 3141, first passage opening; 3142, second passage opening; 3143, second cutting plane; 3161, opening on annular protruding rib.

[0064] 321, first protruding structure; 322, second protruding structure; 323, second positioning structure.

[0065] 4, deformation sheet; 41, first connecting sheet; 42, second connecting sheet; 43, third connecting sheet; 431, bulge structure on deformation sheet.

[0066] 5, push rod; 51, first rod part; 52, second rod part.

[0067] 511, first cutting plane; 521, first side rib; 522, second side rib; 523, spacer.

[0068] 6, elastic member.

[0069] 7, blocking plug; 71, groove. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the drawings.

[0071] The plug in the present embodiment can be a power plug, for example, a plug of a mobile socket, or a plug of an electrical appliance, for example, a plug of a washing machine, a refrigerator or the like. The plug in the present embodiment can be a plug with a power cord or a plug without a power cord. The plug in the present embodiment can be a plug with two pins including a first pin and a second pin, or a plug with three pins including a first pin, a second pin and a third pin.

[0072] In a three-phase alternating current, the first pin is used to be connected to a live wire, so it is also called an L pin, the second pin is used to be connected to a neutral wire, so it is also called an N pin, and the third pin is used to be connected to an earth wire, so it is also called an E pin or a ground pin.

[0073] The plug in the present embodiment is integrated with an overload protection module, so the plug in the present embodiment is also called an overload protection plug. In the present embodiment, the overload protection module is integrated in the plug without changing the shape and size of the plug.

[0074] The plug in the embodiment is provided with an overload protection module, which is beneficial to reducing the size of the mobile socket connected with the plug. Since the overload protection module is integrated in the plug, the overload protection module need not be arranged in the mobile socket, so that the use safety of the plug and the socket is improved, and the size of the socket is reduced, so that more plug holes can be arranged in the socket in limited size.

[0075] The structural features of the plug in the embodiment will be described in detail below.

[0076] As shown in Figure 1 , it is a structural schematic view of the plug, Figure 1 , the plug is a plug with power lines, wherein the power lines are not all shown. As shown in Figure 2 , it is a structural schematic view of the plug pin support of the plug. As shown in Figure 3 , it is a structural schematic view of the arrangement of the overload protection module on the plug pin support.

[0077] As shown in Figures 1 to 4 , the plug comprises a plug shell 100, a plug pin support 200, a plug pin assembly and an overload protection module 400. The plug pin support 200 is in the form of a plate and has plug holes penetrating through the thickness. If the plug is a two-plug pin plug, the plug pin support 200 has a first-pole plug hole 201 and a second-pole plug hole 202. The first-pole plug hole 201 is used for assembling a first-pole plug pin 301, and is also called an L-pole plug hole. The second-pole plug hole 202 is used for assembling a second-pole plug pin 302, and is also called an N-pole plug hole.

[0078] Referring to Figure 2 , the first-pole plug hole 201 and the second-pole plug hole 202 are symmetrically arranged about the center line of the plug pin support 200. The center line of the plug pin support 200 is a straight line parallel to the outgoing direction of the power lines and passing through the center position of the plug pin support 200.

[0079] If the plug is a three-plug pin plug, the plug pin support 200 further has a third-pole plug hole 203, which is used for assembling a third-pole plug pin 303, and is also called an E-pole plug hole or a ground-pole plug hole. Referring to Figure 2 , the third-pole plug hole 203 is located on the center line of the plug pin support 200.

[0080] In the embodiment, a three-plug pin plug as shown in Figure 3 is taken as an example for description.

[0081] Referring to Figure 3As shown, the first pole pin 301 is fixed in the first pole socket 201, and a part of the first pole pin 301 extends out of the first surface of the pin bracket 200 (referred to as the front side of the pin bracket 200), and the other part extends out of the second surface of the pin bracket 200 (referred to as the back side of the pin bracket 200). The first surface and the second surface are positioned opposite each other.

[0082] Continue to refer to Figure 3 As shown, the second pole pin 302 is fixed in the second pole socket 202, and a part of the second pole pin 302 extends out of the first surface of the pin bracket 200, and the other part extends out of the second surface of the pin bracket 200.

[0083] Continue to refer to Figure 3 As shown, the third pole pin 303 is fixed in the third pole socket 203, and a part of the third pole pin 303 extends out of the first surface of the pin bracket 200, and the other part extends out of the second surface of the pin bracket 200.

[0084] refer to Figure 3 As shown, the portions of the first pin 301, the second pin 302, and the third pin 303 that extend out of the first surface of the pin bracket 200 all have terminals, which are respectively referred to as terminal 3011 of the first pin 301, terminal 3021 of the second pin 302, and terminal 3031 of the third pin 303.

[0085] like Figures 3 to 5 As shown, the overload protection module 400 is located on the first surface of the pin bracket 200 and between the first pole socket 201 and the second pole socket 202, wherein the center line of the overload protection module 400 is collinear with the center line of the pin bracket 200 (i.e., on a straight line).

[0086] Continue to refer to Figures 3 to 5 As shown, for a three-pin plug, the overload protection module 400 is specifically located between the first pin socket 201 and the second pin socket 202, and also between the third pin socket 203 and the first position. The first position is specifically located on the center line of the pin bracket 200 and on the edge of the pin bracket 200, that is, at the intersection of the center line of the pin bracket 200 and the edge of the pin bracket 200.

[0087] like Figure 2 And refer to Figure 5 As shown, the area enclosed by the first socket 201, the second socket 202, the third socket 203, and the aforementioned first position is the free area within the plug. Therefore, by arranging an overload protection module within this free area, the overload protection module can be integrated into the plug without changing its shape and size, thus enabling the plug to have overload protection functionality.

[0088] As Figure 5 and referring to Figure 1 shown, the plug pin holder 200 and the overload protection module 400 are both located in the plug housing 100, and the part of the first pole plug pin 301 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the plug pin part) also extends out of the plug housing 100, the part of the second pole plug pin 302 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the plug pin part) also extends out of the plug housing 100, and the part of the third pole plug pin 303 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the plug pin part) also extends out of the plug housing 100. The plug pin parts of the three plug pins that extend out of the plug housing 100 are used to be inserted into the three plug holes of the socket to achieve power taking.

[0089] Continuing to refer to Figure 1 and Figure 5 shown, the part of the first pole plug pin 301 that extends out of the first surface of the plug pin holder 200, the part of the second pole plug pin 302 that extends out of the first surface of the plug pin holder 200, and the part of the third pole plug pin 303 that extends out of the first surface of the plug pin holder 200 are all located in the plug housing 100.

[0090] As described above, the first pole plug pin 301 is connected to the live wire, the second pole plug pin 302 is connected to the zero wire, and the live wire is a live line, while the zero wire is not live and is only responsible for returning the current to the power supply. Therefore, based on the timely cutting off of the power supply and safety considerations, the overload protection module inside the plug needs to be connected to the first pole line inside the plug. For this purpose, the overload protection module 400 can be electrically connected between the first pole plug pin 301 and the first pole wire of the power supply line.

[0091] Correspondingly, the overload protection module 400 includes two wiring structures, one of which is used to connect with the first pole plug pin 301, and the other of which is used to connect with the first pole wire of the power supply line that extends into the plug housing 100. Referring to Figure 5 shown, the wiring structure used to connect with the first pole plug pin 301 is referred to as the first wiring structure 1, and the wiring structure used to connect with the first pole wire of the power supply line is referred to as the second wiring structure 2.

[0092] Then, continuing to refer to Figure 5 shown, the overload protection module 400 includes a module housing 3, the first wiring structure 1 has a wiring end 11 that extends out of the module housing 3, the part of the first pole plug pin 301 that extends out of the first surface of the plug pin holder 200 has a wiring end 3011, and then the wiring end 11 of the first wiring structure 1 is connected with the wiring end 3011 of the first pole plug pin 301.

[0093] Continuing to refer to Figure 5As shown, the second wiring structure 2 has a wiring end 21 extending out of the module housing 3, and the wiring end 21 of the second wiring structure 2 is configured to be connected with the second pole wire of the power cord.

[0094] When the first wiring structure 1 and the second wiring structure 2 are electrically connected, the first pole wire of the power cord is connected with the first pole pin 301, and when the first wiring structure 1 and the second wiring structure 2 are electrically disconnected, the first pole wire of the power cord is disconnected with the first pole pin 301.

[0095] Then, the overload protection module 400 can be configured to electrically disconnect the first wiring structure 1 and the second wiring structure 2 when the internal temperature is relatively high, such as higher than a first temperature threshold, and electrically connect the first wiring structure 1 and the second wiring structure 2 when the internal temperature is relatively low, such as lower than a second temperature threshold. Generally, the first temperature threshold is higher than the second temperature threshold.

[0096] In application, when the circuit connected with the plug is overloaded or short-circuited, the current value on the circuit where the first wiring structure 1 and the second wiring structure 2 are located in the overload protection module is relatively large, and the temperature is relatively high, which promotes the first wiring structure 1 and the second wiring structure 2 to be electrically disconnected. When the circuit connected with the plug is normally operated, the current value on the circuit where the first wiring structure 1 and the second wiring structure 2 are located in the overload protection module is within a normal range, and the temperature is also within a normal range, and then the first wiring structure 1 and the second wiring structure 2 are electrically connected.

[0097] In an example, the first wiring structure 1 and the second wiring structure 2 are automatically electrically disconnected when the internal temperature of the overload protection module is relatively high. And the first wiring structure 1 and the second wiring structure 2 can also automatically switch to be electrically connected when the internal temperature is relatively low. For safe use, the first wiring structure 1 and the second wiring structure 2 can be switched to be electrically connected by the reset button when the internal temperature is relatively low.

[0098] Correspondingly, referring to Figure 5 As shown, the overload protection module has a button 401, which is also called a reset button, and referring to Figure 1 As shown, the button 401 is exposed on the top of the plug housing 100. Then, 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 (i.e., an electrically connected state), and when the button 401 is in a popped-up state, the first wiring structure 1 and the second wiring structure 2 are in a disconnected state (i.e., an electrically disconnected state).

[0099] As described above, the first wiring structure 1 of the overload protection module is used to connect with the first pole pin 301. 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 that extends out of the module housing 3 can be arranged so that the wiring terminal 11 of the first wiring structure 1 and the first pole pin 301 are located on the same side of the module housing 3.

[0100] As for the part of the second wiring structure 2 of the overload protection module that extends out of the module housing 3, namely the wiring terminal 21 of the second wiring structure 2, it can be located on the same side of the module housing 3 as the wiring terminal 11 of the first wiring structure 1, or it can be located on the opposite side of the module housing 3 as the wiring terminal 11 of the first wiring structure 1.

[0101] However, since terminal 21 of the second wiring structure 2 is used to connect to the first conductor of the power cord, and the second pin 302 is used to connect to the second conductor of the power cord, if terminal 21 of the second wiring structure 2 and the second pin 302 are located on the same side of the module housing 3, a short circuit may easily occur due to the connection between the first conductor and the second conductor.

[0102] Therefore, refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 is also located on the same side of the module housing 3 as the first pole pin 301. The module housing 3 is located between the first pole pin 301 and the second pole pin 302. Therefore, the terminal 21 of the second wiring structure 2 and the second pole pin 302 can be located on opposite sides of the module housing 3, thereby reducing the probability of the first pole wire and the second pole wire of the power line being connected.

[0103] Since the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are both located 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. Therefore, along a 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.

[0104] Considering that terminal 11 of the first wiring structure 1 is used to connect to the first pole pin 301, and the first pole socket 201 where the first pole pin 301 is located is an empty area inside the plug away from the power cord, terminal 21 of the second wiring structure 2 is further away from the power cord than terminal 11 of the first wiring structure 1. This can also be understood as, with reference to... Figure 5As shown, in the front-rear direction along the center line of the plug holder 200, in the orientation with the third-pole plug 303 in front and the power cord in back, the wiring end 21 of the second wiring structure 2 is in front and the wiring end 11 of the first wiring structure 1 is in back.

[0105] Referring to Figure 5 As shown, the wiring end 21 of the second wiring structure 2 is in front of the wiring end 11 of the first wiring structure 1, and the wiring end 21 of the second wiring structure 2 and the wiring end 3021 of the second-pole plug 302 are located on opposite sides of the module housing 3, and the positions of both the wiring end 3021 of the second-pole plug 302 and the wiring end 11 of the first wiring structure 1 are symmetrical about the module housing 3, so, referring to Figure 5 As shown, the wiring end 21 of the second wiring structure 2 and the wiring end 3021 of the second-pole plug 302 are diagonally distributed and far apart, and then the first-pole wire (i.e., the L-pole wire) of the power cord connected to the wiring end 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 wiring end 3021 of the second-pole plug 302 are far apart, and it is not easy to occur the connection, so, as shown Figure 5 As shown, the arrangement of the wiring end 11 of the first wiring structure 1 and the wiring end 21 of the second wiring structure 2 is conducive to improving the safety of the plug in use.

[0106] Because the wiring end 11 of the first wiring structure 1 and the wiring end 21 of the second wiring structure 2 are located on the same side of the module housing 3 and are distributed along the front-rear direction of the module housing 3, in order to facilitate the connection of the wiring end 21 of the second wiring structure 2 to the first-pole wire of the power cord, accordingly, referring to Figure 4 As shown, in the direction perpendicular to the plug holder 200 (which is also the thickness direction of the plug), the wiring end 11 of the first wiring structure 1 is located between the wiring end 21 of the second wiring structure 2 and the first surface of the plug holder 200, which can also be understood as that the wiring end 11 of the first wiring structure 1 is lower than the wiring end 21 of the second wiring structure 2, and it can also be understood that the wiring end 11 of the first wiring structure 1 is closer to the plug holder 200 than the wiring end 21 of the second wiring structure 2.

[0107] For example, the wiring end 11 of the first wiring structure 1 is in the shape of a sheet, and the plane thereof is parallel to the first surface of the plug holder 200, and the wiring end 21 of the second wiring structure 2 is in the shape of a cylinder, and the axial center line thereof is perpendicular to the first surface of the plug holder 200, then the top surface of the wiring end 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 wiring end 21 of the second wiring structure 2 (i.e., the end facing the first surface of the plug holder 200).

[0108] The first connecting terminal 11 of the first connecting structure 1 does not interfere with the connection of the connecting terminal 21 of the second connecting structure 2 and the first pole wire of the power cord. For example, when the first pole wire of the power cord is crimped in the connecting terminal 21 of the second connecting structure 2 using a tool, the first connecting terminal 11 of the first connecting structure 1 does not easily interfere with the operation of the crimping tool.

[0109] Therefore, in the connection, the first connecting terminal 11 of the first connecting structure 1 and the connecting terminal 21 of the second connecting structure 2 are far apart in the direction perpendicular to the plug holder 200, the first connecting terminal 11 of the first connecting structure 1 does not easily interfere with the connection operation of the connecting terminal 21 of the second connecting structure 2 and the first pole wire of the power cord, and the connecting terminal 21 of the second connecting structure 2 does not easily interfere with the connection operation of the first connecting terminal 11 of the first connecting structure 1 and the connecting terminal 3011 of the first pole plug 301. Thus, the connection efficiency is improved.

[0110] Referring to Figure 4 As shown, the first connecting terminal 11 of the first connecting structure 1 is lower than the connecting terminal 21 of the second connecting structure 2, the first connecting terminal 11 of the first connecting structure 1 is used to connect with the connecting terminal 3011 of the first pole plug 301, and the connecting terminal 21 of the second connecting structure 2, the connecting terminal 3021 of the second pole plug 302 and the connecting terminal 3031 of the third pole plug 303 are respectively used to electrically connect with the first pole wire, the second pole wire and the third pole wire of the power cord, as shown in Figure 3 As shown, the connecting terminal 3011 of the first pole plug 301 is lower than the connecting terminal 3021 of the second pole plug 302, and is also lower than the connecting terminal 3031 of the third pole plug 303. It can also be understood that, in the direction perpendicular to the plug holder 200 (i.e. in the thickness direction of the plug), the connecting terminal 3011 of the first pole plug 301 is located between the connecting terminal 3021 of the second pole plug 302 and the first surface of the plug holder 200. It can also be understood that, compared with the connecting terminal 3021 of the second pole plug 302, the connecting terminal 3011 of the first pole plug 301 is closer to the first surface of the plug holder 200.

[0111] Among them, the height of the connecting terminal 3021 of the second pole plug 302 and the connecting terminal 3031 of the third pole plug 303 relative to the plug holder 200 can be equal.

[0112] For example, the connecting terminal 3011 of the first pole plug 301 is in the shape of a convex column and is located at the top end of the plug part of the first pole plug 301, and the connecting terminal 3021 of the second pole plug 302 is in the shape of a cylinder and the axial center line is perpendicular to the first surface of the plug holder 200, as shown in Figure 3As shown, the top end of the terminal end 3011 of the first pole plug 301 (i.e. the end facing away from the plug holder 200) is lower than the bottom end of the terminal end 3021 of the second pole plug 302 (i.e. the end facing towards the plug holder 200).

[0113] Based on the above description, reference is made to Figure 3 As shown, the first pole plug 301 can include a plug portion and a terminal end 3011 in structure. The plug portion is fixed in the first pole hole 201, and one end of the plug portion extends out of the first surface of the plug holder 200, and the other end of the plug portion extends out of the second surface of the plug holder 200. The terminal end 3011 is located at the end of the plug portion extending out of the first surface of the plug holder 200. The terminal end 3011 is in the shape of a convex column, located at the middle position of the top end of the plug portion, and protrudes away from the first surface of the plug holder 200.

[0114] Continuing to refer to Figure 3 As shown, the second pole plug 302 and the third pole plug 303 can include a plug portion, a terminal end, and a connecting portion connected between the plug portion and the terminal end in structure. Taking the second pole plug 302 as an example, the plug portion of the second pole plug 302 is fixed in the second pole hole 202, and one end of the plug portion extends out of the first surface of the plug holder 200, and the other end of the plug portion extends out of the second surface of the plug holder 200. The connecting portion is fixed on the end of the plug portion extending out of the first surface of the plug holder 200, and the terminal end 3021 is fixed on the connecting portion. The terminal end is in the shape of a cylinder, and its axial center line is perpendicular to the first surface of the plug holder 200. The cylindrical terminal end is formed by rolling up a rectangular conductive sheet (such as a copper sheet).

[0115] Continuing to refer to Figure 3 As shown, the top end of the plug portion of the first pole plug 301 extending out of the first surface of the plug holder 200, the top end of the plug portion of the second pole plug 302 extending out of the first surface of the plug holder 200, and the top end of the plug portion of the third pole plug 303 extending out of the first surface of the plug holder 200 are located in approximately the same plane, which is parallel to the first surface of the plug holder 200.

[0116] It should be noted that, referring to Figure 4 and Figure 5 As shown, the terminal end 21 of the second wiring structure 2, the terminal end 3021 of the second pole plug 302, and the terminal end 3031 of the third pole plug 303 for connecting with the power cord are all lower than the height of the module housing 3 in the thickness direction. For example, the terminal end 21 of the second wiring structure 2, the terminal end 3021 of the second pole plug 302, and the terminal end 3031 of the third pole plug 303 are all located at approximately the middle position of the module housing 3. This height relationship makes the overload protection module not cause the height of the plug to be too high, or even not change the original height of the plug.

[0117] The following describes the wiring method in which the power cord is connected to terminal 21 of the second wiring structure 2, terminal 3021 of the second pole plug 302, and terminal 3031 of the third pole plug 303.

[0118] The power cord can be connected to the plug via a terminal block or by crimping.

[0119] 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. Therefore, the wiring method can be crimping. For example, the power cord is inserted into the cylinder, and a crimping tool is used to flatten the cylinder so that the terminal is fixedly connected to the power cord.

[0120] To facilitate flattening the cylindrical terminal, refer to the relevant documentation. 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. Therefore, the cylindrical terminals are weaker at the openings and are easier to press against the wire.

[0121] Continue to refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 has an opening 211 that penetrates the thickness of the cylinder wall, and the terminal 3021 of the second pole pin 302 has an opening that penetrates the thickness of the cylinder wall. Figure 5 Specifically, the gap extends through the length and thickness of the cylinder wall; the terminal 3031 of the third pole pin 303 has an opening that extends through the thickness of the cylinder wall. Figure 3 Specifically, this refers to a gap that extends through the length and thickness of the cylinder wall.

[0122] The openings on the terminals 3021 of the second pole pin 302 and the openings on the terminals 3031 of the third pole pin 303 are both gaps formed by the left and right edges of a rectangular conductive sheet (such as a copper sheet) being rolled up to form a cylindrical terminal.

[0123] In one example, the opening 211 on the terminal 21 of the second wiring structure 2 does not extend through the length of the cylinder wall; instead, it is a groove structure that extends through the thickness of the cylinder wall. For ease of wire clamping, refer to... Figure 6 As shown, there can be two openings 211 on the cylinder wall of the terminal 21. One opening 211 extends from the top end of the terminal 21 to the bottom end of the terminal 21, and the other opening 211 extends from the bottom end of the terminal 21 to the top end of the terminal 21. The center lines of the two openings 211 can be collinear.

[0124] In one example, continue to refer to Figure 6As shown, the opening 211 on the terminal 21 can be closer to the protruding structure 213 on the terminal 21, because the protruding structure 213 is located at the side edge of the terminal 21, then the terminal 21 is a weak force position at the side edge and the opening 211, and is more prone to crimping. The structural features of the second terminal structure 2 will be described below.

[0125] With continued reference to Figure 5 As shown, the center line of the opening 211 on the terminal 21 of the second terminal structure 2 is on a straight line parallel to the center line of the plug holder 200 with the center line of the opening on the terminal 3021 of the second pole plug 302. For example, the straight line parallel to the center line of the plug holder 200 and passing through the center of the circle of the terminal 21 of the second terminal structure 2 also passes through the opening 211 on the terminal 21 of the second terminal structure 2. The straight line parallel to the center line of the plug holder 200 and passing through the center of the circle of the terminal 3021 of the second pole plug 302 also passes through the opening on the terminal 3021 of the second pole plug 302.

[0126] With continued reference to Figure 5 As shown, the center line of the opening on the 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 circle of the terminal 3031 of the third pole plug 303 also passes through the opening on the terminal 3031 of the third pole plug 303.

[0127] In an example, the opening 211 on the terminal 21 of the second terminal structure 2 and the opening on the terminal 3021 of the second pole plug 302 can have the same direction or opposite directions. For example, referring to Figure 5 As shown, the opening 211 on the terminal 21 of the second terminal structure 2 and the opening on the terminal 3021 of the second pole plug 302 have opposite directions, the opening 211 on the terminal 21 of the second terminal structure 2 faces forward, and the opening on the terminal 3021 of the second pole plug 302 faces backward.

[0128] Based on the fact that the opening 211 on the terminal 21 of the second terminal structure 2 and the opening on the terminal 3021 of the second pole plug 302 are both in the front-back direction as shown Figure 5 As shown, the opening on the terminal 3031 of the third pole plug 303 is in the left-right direction as shown Figure 5 Therefore, in the crimping of the three terminals of the power supply line, the crimping of the first pole wire of the power supply line and the terminal 21 of the second terminal structure 2, and the crimping of the second pole wire of the power supply line and the terminal 3021 of the second pole plug 302, belong to the front-back crimping and can be crimped at the same time. The crimping of the third pole wire of the power supply line and the terminal 3031 of the third pole plug 303 belongs to the left-right crimping.

[0129] Referring to Figure 5 As shown in FIG. 4, the overload protection module 400 is arranged at the rear side of the terminal end 3031 of the third polar plug-in 303, and the two positions are adjacent. However, because the terminal end 3031 of the third polar plug-in 303 and the crimping direction of the third polar wire of the power cord are in the left-right direction, the overload protection module 400 basically does not interfere with the connection of the third polar plug-in 303 and the third polar wire of the power cord.

[0130] Then, referring to Figure 5 As shown in FIG. 4, the power cord inserted into the plug housing 100 can have its first polar wire, second polar wire and third polar wire inserted into the terminal end 21 of the second polar structure 2, the terminal end 321 of the second polar plug-in 302 and the terminal end 3031 of the third polar plug-in 303 respectively, and then the terminal end 21 and the terminal end 3021 are crimped front and back, and the terminal end 3031 is crimped left and right using a wire crimping tool.

[0131] In an example, the plug housing 100 is generally formed by encapsulating the plug-in support 200 and the overload protection module 400 therein. In order to avoid the power cord moving left and right in the left-right direction and moving up and down in the thickness direction, the plug-in support 200 has a power cord support 204 at the first position, as shown in FIG. 4. Figures 2 to 5

[0132] The power cord support 204 is used to support and limit the power cord inserted into the plug housing 100.

[0133] Referring to Figure 3 As shown in FIG. 4, the power cord support 204 includes a transverse portion and a vertical portion connected vertically, wherein the transverse portion is fixed at the first position of the plug-in support 200, and the vertical portion is connected vertically with the transverse portion and extends upward compared to the first surface of the plug-in support 200.

[0134] Continuing to refer to Figure 3 As shown in FIG. 4, the vertical portion of the power cord support 204 has a power cord hole 2041, and the power cord inserted into the plug housing 100 passes through the power cord hole 2041, thereby limiting the circumferential movement of the power cord without affecting the axial movement for pulling during crimping.

[0135] ​In one example, the power cord visually comprises an outer insulating layer and three conductors within the insulating layer: a first conductor, a second conductor, and a third conductor. During wiring, the insulating layer at the ends of the power cord has been stripped, exposing the three conductors. In this case, when inserting the power cord into the power cord hole 2041, it is difficult for all three conductors to be inserted simultaneously. Therefore, refer to... Figure 3 As shown, the top of the vertical portion of the power cord bracket 204 has an opening 2042, which is connected to the power cord hole 2041. The size of the opening 2042 of the power cord bracket 204 is similar to the outer diameter of the power cord. Therefore, the power cord can be inserted into the opening 2042 of the power cord bracket 204 and then into the power cord hole 2041. This eliminates the need to insert the end of the power cord into the power cord hole 2041, making the wire threading operation convenient.

[0136] Further, refer to Figure 5 As shown, the opening 2042 of the power cord bracket 204 is flared at the top of the first surface away from the plug bracket 200. It is relatively large, which makes it easier for the power cord to be inserted into the power cord hole 2041 through the opening, further facilitating the wire threading operation.

[0137] The above describes the layout of the overload protection module 400 on the first surface of the pin bracket 200. The features of the overload protection module 400 are described below.

[0138] like Figures 7 to 10 The diagram shown is a structural schematic of the overload protection module 400. (Refer to...) Figure 7 As shown, the overload protection module housing 3 includes a bottom shell 31 and a top cover 32. The bottom shell 31 is box-shaped, specifically an open-top box structure, including a bottom wall and multiple side walls, which enclose an internal space. The top cover 32 is used to fasten to the top of the bottom shell 31.

[0139] refer to Figure 7 As shown, the top end face of the bottom shell 31 has multiple first positioning structures 317, and the bottom end face of the top cover 32 has multiple second positioning structures 323. The bottom shell 31 and the top cover 32 are pre-positioned through the first positioning structures 317 and the second positioning structures 323.

[0140] The first positioning structure 317 at the top of the bottom shell 31 can be a square hole, i.e., a through hole with a square cross-section. The through hole can be a through hole that penetrates the thickness of the bottom shell 31, or it can be a blind hole that extends from the top of the bottom shell 31 along the thickness direction to the bottom of the bottom shell 31, but does not penetrate the thickness of the bottom shell 31. The second positioning structure 323 at the bottom of the top cover 32 can be a cylinder, i.e., a cylinder perpendicular to the bottom end face of the top cover 32.

[0141] Alternatively, the first positioning structure 317 is a cylinder on the top end surface of the bottom shell 31, and the second positioning structure 323 is a through hole on the bottom end surface of the upper cover 32.

[0142] Referring to Figure 7 As shown, the first positioning structure 317 on the top end of the bottom shell 31 is a square hole, and the second positioning structure 323 on the upper cover 32 is a cylinder. The cylinder is inserted into the square hole. Compared with the cylinder inserted into the round hole, the four corners of the square hole can absorb the machining tolerance and assembly tolerance, so that the cylinder is more easily inserted into the square hole.

[0143] Continuing to refer to Figure 7 As shown, the square hole on the top end of the bottom shell 31 has a guide structure at the top end surface, and the cylinder on the bottom end of the upper cover 32 has a spherical surface on the outer surface of the end. Then, under the action of the spherical surface and the guide structure, the cylinder on the bottom end of the upper cover 32 is more easily inserted into the square hole on the top end of the bottom shell 31, thereby improving the assembly efficiency of the overload protection module.

[0144] Based on similar principles, the overload protection module can also be pre-positioned on the first surface of the latch bracket 200 through the cooperation of the square hole and the cylinder. For example, referring to Figure 2 As shown, the first surface of the latch bracket 200 has a plurality of fourth positioning structures 206, and referring to Figure 17 As shown, the bottom surface of the bottom shell 31 has a plurality of third positioning structures 318. Through the one-to-one cooperation of the third positioning structures 318 and the fourth positioning structures 206, the bottom of the bottom shell 31 is pre-positioned on the first surface of the latch bracket 200.

[0145] 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.

[0146] As described above, the overload protection module also includes two wiring structures, which are a first wiring structure 1 and a second wiring structure 2, as shown in Figure 7 and referring to Figure 8 As shown, the first wiring structure 1 and the second wiring structure 2 are installed in the module shell 3, and a part is located in the module shell 3, and the other part protrudes from the module shell 3.

[0147] Among them, the part of the first wiring structure 1 located outside the module shell 3 includes a wiring end for connecting with the wiring end 3011 of the first pole latch 301, and the part of the second wiring structure 2 located outside the module shell 3 includes a wiring end for connecting with the first pole wire of the power line.

[0148] The part of the first wiring structure 1 located in the module housing 3 comprises a connecting piece, the part of the second wiring structure 2 located in the module housing 3 comprises a connecting piece, and the connecting piece of the first wiring structure 1 and the connecting piece of the second wiring structure 2 can be electrically connected and disconnected to realize the connection and disconnection of the overload protection module.

[0149] As described above, the wiring end 11 of the first wiring structure 1, the wiring end 21 of the second wiring structure 2, and the wiring end 3011 of the first pole plug 301 are located on the same side of the module housing 3, and as shown in Figure 7 , the side wall of the bottom shell 31 adjacent to the first pole plug 301 is referred to as the first side wall 311, then the wiring end 11 of the first wiring structure 1 and the wiring end 21 of the second wiring structure 2 both extend out of the bottom shell 31 through the first side wall 311, the first wiring structure 1 is clamped on the first side wall 311 of the bottom shell 31, and the second wiring structure 2 is also clamped on the first side wall 311 of the bottom shell 31. As for the clamping method, it will be described later in the introduction of the characteristics of the two wiring structures.

[0150] The characteristics of the first wiring structure 1 and the second wiring structure 2 will be introduced below.

[0151] The characteristics of the first wiring structure 1, as shown in Figure 7 , include the wiring end 11, the connecting piece 12, and the transition piece 13, wherein the wiring end 11, the connecting piece 12, and the transition piece 13 are all in the form of a sheet, the transition piece 13 is connected between the wiring end 11 and the connecting piece 12, and the transition piece 13 is connected perpendicularly to the wiring end 11 and the connecting piece 12, wherein the wiring end 11 has a wiring hole for cooperating with the wiring end (in the form of a convex column) of the first pole plug 301.

[0152] Based on the characteristics of the wiring end 11, the connecting piece 12, and the transition piece 13 of the first wiring structure 1 and the relationship between them, the three can be integrally formed and can be formed by bending a conductive sheet. For example, as shown in Figure 7 , a conductive sheet in the form of a "7" is bent ninety degrees forward in its horizontal part and ninety degrees backward in its vertical part, and the first wiring structure 1 as shown in Figure 7 can be obtained.

[0153] As shown in Figure 7 and as shown in Figure 8 and Figure 5 , when the first wiring structure 1 is installed in the bottom shell 31 and the bottom shell 31 is installed on the first surface of the plug holder 200, the wiring end 11 of the first wiring structure 1 is located outside the bottom shell 31 and parallel to the first surface of the plug holder 200.

[0154] Continuing to refer to Figure 7 and Figure 8As shown, after the first wiring structure 1 is assembled into the bottom shell 31, the connecting tab 12 of the first wiring structure 1 is located inside the bottom shell 31 and parallel to the first side wall 311 of the bottom shell 31, and the transition tab 13 of the first wiring structure 1 is perpendicular to the first side wall 311 of the bottom shell 31.

[0155] Continuing to refer to Figure 7 and Figure 8 As shown, the transition tab 13 of the first wiring structure 1 is clamped with the first side wall 311, and accordingly, the first side wall 311 has a first clamping slot 3111, and the slot opening of the first clamping slot 3111 is located at the top end of the bottom shell 31, and the first clamping slot 3111 penetrates the thickness of the first side wall 311.

[0156] In order to facilitate the clamping of the transition tab 13 of the first wiring structure 1 into the first clamping slot 3111 of the first side wall 311, accordingly, refer to Figure 7 As shown, the slot opening of the first clamping slot 3111 is in the shape of a horn. Then, the slot width of the first clamping slot 3111 at the slot opening is larger, making it easier for the transition tab 13 to enter the first clamping slot 3111.

[0157] The second wiring structure 2, refer to Figure 6 As shown, it includes a cylindrical wiring end 21, a tab-shaped connecting tab 22, and a tab-shaped transition tab 23, the transition tab 23 is connected between the wiring end 21 and the connecting tab 22, and the transition tab 23 and the connecting tab 22 are connected perpendicularly, and the intersection line of the transition tab 23 and the connecting tab 22 is parallel to the axial center line of the wiring end 21.

[0158] Based on the respective characteristics of the wiring end 21, the connecting tab 22 and the transition tab 23 of the second wiring structure 2 and the relationship therebetween, the three can be integrally formed and can be formed by bending an electrically conductive sheet.

[0159] Then, continuing to refer to Figure 6 As shown, the second wiring structure 2 can be formed by a one-letter-shaped electrically conductive sheet through one right-angle bending and one rolling. Refer to Figure 6 As shown, the left end portion of the electrically conductive sheet (such as a copper sheet) is bent ninety degrees forward at the straight line L1 (that is, bent ninety degrees counterclockwise around the straight line L1), thereby forming the connecting tab 22 of the second wiring structure 2 for connecting with the deformation sheet 4. Continuing to refer to Figure 6 As shown, the right end portion of the electrically conductive sheet is rolled up forward at the straight line L2 (that is, rolled up counterclockwise around the straight line L2), and the right end protruding structure 213 is clamped (that is, inserted) into the clamping opening 212 on the electrically conductive sheet, so that the rolled-up cylindrical structure will not bounce back. Among them, refer to Figure 6 As shown, the clamping opening 212 is located at the intersection of the transition tab 23 and the wiring end 21.

[0160] Compared with the second wiring structure formed by the T-shaped conductive sheet, the second wiring structure formed by the linear conductive sheet has the advantages of simple structure, less material and low cost.

[0161] As shown in Figure 7 and referring to Figure 8 and Figure 5 , the second wiring structure 2 is installed in the bottom shell 31, and after the bottom shell 31 is installed on the first surface of the latch bracket 200, the wiring end 21 of the second wiring structure 2 is located outside the bottom shell 31, and the axial center line of the cylindrical wiring end 21 is perpendicular to the first surface of the latch bracket 200.

[0162] Continuing to refer to Figure 7 and Figure 8 , after the second wiring structure 2 is installed in the bottom shell 31, the connecting sheet 31 of the second wiring structure 2 is located inside the bottom shell 31, and is parallel to the first side wall 311 of the bottom shell 31, and the transition sheet 23 of the second wiring structure 2 is perpendicular to the first side wall 311 of the bottom shell 31.

[0163] Continuing to refer to Figure 7 and Figure 8 , the transition sheet 23 of the second wiring structure 2 is clamped with the first side wall 311, and accordingly, the first side wall 311 has a second clamping groove 3112, and the slot of the second clamping groove 3112 is at the top end of the bottom shell 31, and the second clamping groove 3112 penetrates the thickness of the first side wall 311.

[0164] In order to facilitate the transition sheet 23 of the second wiring structure 2 to be clamped into the second clamping groove 3112 of the first side wall 311, accordingly, referring to Figure 7 , the slot of the second clamping groove 3112 is in the shape of a horn. Then, the slot width of the second clamping groove 3112 at the slot is larger, so that the transition sheet 23 is more easily entered into the second clamping groove 3112.

[0165] Referring to Figure 9 , after the upper cover 32 is installed on the bottom shell 31, the upper cover 32 can be pressed against the top end of the transition sheet 13 of the first wiring structure 1 and the top end of the transition sheet 23 of the second wiring structure 2 to limit the first wiring structure 1 and the second wiring structure 2 from the top and bottom.

[0166] For example, referring to Figure 7 , the bottom end of the upper cover 32 has a first protruding structure 321 and a second protruding structure 322, wherein the first protruding structure 321 is matched with the slot shape of the first clamping groove 3111, and the second protruding structure 321 is matched with the slot shape of the second clamping groove 3112, referring to Figure 9As shown, after the upper cover 32 is buckled on the bottom shell 31, the first protruding structure 321 is clamped at the slot of the first clamping slot 3111 and presses against the top end of the first wiring structure 1, and the second protruding structure 322 is clamped at the slot of the second clamping slot 3112 and presses against the top end of the second wiring structure 2.

[0167] As described above, the slot of the first clamping slot 3111 is in a trumpet shape, and the slot of the second clamping slot 3112 is in a trumpet shape, so that, referring to Figure 7 As shown, the cross-sectional shape of the first protruding structure 321 is trapezoidal, and the cross-sectional shape of the second protruding structure 322 is also trapezoidal. In this way, the outer surface of the first protruding structure 321 is fitted with the inner surface of the slot of the first clamping slot 3111, and the outer surface of the second protruding structure 322 is fitted with the inner surface of the slot of the second clamping slot 3112.

[0168] In an example, referring to Figure 6 As shown, the axial center line of the wiring end 21 is located on the first side of the transition sheet 23, and the connecting sheet 22 is located on the second side of the transition sheet 23, wherein the first side and the second side of the transition sheet 23 are two sides opposite in position along the thickness direction of the transition sheet 23. Referring to Figure 5 As shown, the wiring end 21 and the connecting sheet 22 of the second wiring structure 2 are arranged in such a way that it is conducive to widening the distance between the wiring end 11 of the first wiring structure 1 and the wiring end 21 of the second wiring structure 2, so as to facilitate riveting or welding.

[0169] As described above, the wiring end 11 of the first wiring structure 1 is connected with the wiring end 3011 of the first pole plug 301, referring to Figure 5 As shown, the wiring end 11 of the first wiring structure 1 is in a sheet shape and has a wiring hole thereon, and the wiring end 3011 of the first pole plug 301 is in a convex column shape, so that the wiring end 3011 of the first pole plug 301 is inserted into the wiring end 11 of the first wiring structure 1, and then riveting or welding can be performed to ensure stable connection between the two.

[0170] In an example, as described above, the first wiring structure 1 and the second wiring structure 2 can be electrically connected or disconnected, for which, referring to Figure 7 As shown, the overload protection module includes the deformation sheet 4, and the portions of the first wiring structure 1 and the second wiring structure 2 located in the bottom shell 31 are connected through the deformation sheet 4, that is, the connecting sheet 12 of the first wiring structure 1 and the connecting sheet 22 of the second wiring structure 2 are electrically connected and disconnected through the deformation sheet 4.

[0171] The features of the deformation sheet 4 will be described below.

[0172] As Figure 11 As shown, it is a structural schematic diagram of the deformation sheet 4, referring to Figure 11As shown, the deformation sheet 4 includes two connecting sheets, one of which is connected with the first wiring structure 1 and the other of which is connected with the second wiring structure 2. The connecting sheet to be connected with the first wiring structure 1 is referred to as a first connecting sheet 41, and the connecting sheet to be connected with the second wiring structure 2 is referred to as a second connecting sheet 42. Then, referring to Figure 7 As shown, the first connecting sheet 41 of the deformation sheet 4 is connected with the connecting sheet 12 of the first wiring structure 1, and the second connecting sheet 42 of the deformation sheet 4 is connected with the connecting sheet 22 of the second wiring structure 2.

[0173] Continuing to refer to Figure 11 As shown, the first connecting sheet 41 and the second connecting sheet 42 are connected through a third connecting sheet 43.

[0174] In order to realize the connection and disconnection between the first wiring structure 1 and the second wiring structure 2, correspondingly, the connection between the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 and the connection between the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 22 of the second wiring structure 2 are one fixed connection and the other movable connection. For example, the connection between the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 is a fixed connection, and the connection between the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 22 of the second wiring structure 2 is a movable connection.

[0175] Then, referring to Figure 8 As shown, the second connecting sheet 42 of the deformation sheet 4 has a movable contact and a stationary contact on the surfaces facing each other of the connecting sheet 21 of the second wiring structure 2.

[0176] Here, the deformation sheet 4 realizes the separation and contact of the movable contact and the stationary contact through high-temperature deformation and low-temperature reset.

[0177] For example, when the temperature is higher than the first temperature threshold, the deformation sheet 4 deforms, after the deformation sheet 4 deforms, the second connecting sheet 42 of the deformation sheet 4 is bounced away from the connecting sheet 22 of the second wiring structure 2, and the movable contact is bounced away from the stationary contact, so that the electrical connection between the first wiring structure 1 and the second wiring structure 2 is disconnected. And when the temperature is not higher than the first temperature threshold, the deformation sheet 4 resets, after the deformation sheet 4 resets, the movable contact on the second connecting sheet 42 of the deformation sheet 4 contacts the stationary contact on the connecting sheet 22 of the second wiring structure 2, so that the first wiring structure 1 and the second wiring structure 2 are electrically connected.

[0178] Since the connection between the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 is a fixed connection, referring to Figure 7 As shown, the bottom shell 31 has a third clamping groove 313 between the first side wall 311 and the second side wall 312, as shown in Figure 8Referring to Figure 7 As shown in

[0179] Referring to Figure 7 and Figure 8 As shown in

[0180] Because the connection between the second connecting piece 42 of the deformation sheet 4 and the connecting piece 22 of the second wiring structure 2 is a movable connection, the second connecting piece 42 of the deformation sheet 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 sheet 4 will be repelled and reset relative to the connecting piece 22 of the second wiring structure 2. Therefore, during the repelling and resetting of the second connecting piece 42 of the deformation sheet 4, the second wiring structure 2 will be pushed to move in a direction perpendicular to the first side wall 311.

[0181] For this purpose, continuing to refer to Figure 7 As shown in

[0182] Continuing to refer to Figure 7 As shown in

[0183] The principle of high-temperature deformation and low-temperature reset of the deformation sheet 4 can be caused by the different thermal expansion coefficients of the two surfaces of the deformation sheet 4 along the thickness direction.

[0184] For example, the deformation sheet 4 can be a bimetallic sheet formed by two metal materials with different thermal expansion coefficients, for example, the deformation sheet 4 includes a first metal sheet and a second metal sheet, wherein the thermal expansion coefficient of the first metal sheet is greater than the thermal expansion coefficient of the second metal sheet, and the first metal sheet and the second metal sheet are fixedly attached together to form the deformation sheet 4.

[0185] In this way, when the temperature inside the overload protection module is high, the thermal expansion coefficient of the first metal sheet is greater than the thermal expansion coefficient of the second metal sheet, so the deformation amount of the first metal sheet is greater than the deformation amount of the second metal sheet, but the first metal sheet and the second metal sheet are always fixed together, and then the first metal sheet with large deformation bends towards the second metal sheet with small deformation.

[0186] Reference Figure 8 As shown in FIG. 6, the connecting sheet 12 of the first wiring structure 1 is parallelly located at the inner surface of the first side wall 311, and the connecting sheet 22 of the second wiring structure 2 is parallelly located at the inner surface of the first side wall 311. Then, after the deformation sheet 4 is loaded into the bottom shell 31, the first metal sheet of the deformation sheet 4 faces the first side wall 311 of the bottom shell 31, and the second metal sheet of the deformation sheet 4 faces away from the first side wall 311, wherein the movable contact on the second connecting sheet 42 of the deformation sheet 4 is arranged on the surface of the first metal sheet.

[0187] Reference Figure 7 and Figure 8 As shown in FIG. 6, the first connecting sheet 41 of the deformation sheet 4 is fixedly connected with the connecting sheet 12 of the first wiring structure 1 and clamped in the third clamping groove 313 of the bottom shell 31, so when the deformation sheet 4 deforms, the second connecting sheet 42 of the deformation sheet 4 will swing (also called pop up) away from the connecting sheet 22 of the second wiring structure 2 with the first connecting sheet 41 as the fulcrum, so as to make the movable contact on the second connecting sheet 42 of the deformation sheet 4 separate from the static contact on the connecting sheet 22 of the second wiring structure 2, and once the two are separated, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is disconnected.

[0188] When the deformation sheet 4 resets, the second connecting sheet 42 of the deformation sheet 4 will swing towards the connecting sheet 22 of the second wiring structure 2 with the first connecting sheet 41 as the fulcrum, so as to make the movable contact on the second connecting sheet 42 of the deformation sheet 4 contact with the static contact on the connecting sheet 22 of the second wiring structure 2, and once the two are in contact, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is connected.

[0189] In an example, in order to make the second connecting sheet 42 of the deformation sheet 4 pop up away from the connecting sheet 22 of the second wiring structure 2 with the first connecting sheet 41 as the fulcrum, correspondingly, as shown in FIG. 6, Figure 10 and reference Figure 8As shown, after the deformation sheet 4 is loaded into the bottom shell 31, the deformation sheet 4 (e.g. the bulge structure 431 of the deformation sheet 4) has a space H with the second side wall 312, which is used for the deformation of the deformation sheet 4, and the second connecting sheet 42 of the deformation sheet 4 is pivoted at the first connecting sheet 41 and is bounced away from the connecting sheet 22 of the second wiring structure 2.

[0190] In an example, the thickness of the deformation sheet 4 is relatively thin (e.g. less than 0.2 mm), which makes the rigidity of the deformation sheet 4 relatively small, and the second connecting sheet 42 of the deformation sheet 4 is easily separated from the connecting sheet 22 of the second wiring structure 2 due to a slight change in temperature. For this purpose, referring to Figure 10 and Figure 11 As shown, the third connecting sheet 43 between the first connecting sheet 41 and the second connecting sheet 42 of the deformation sheet 4 has a bulge structure 431 that is bulged away from the first side wall 311, i.e. towards the second side wall 312, and the bulge structure 431 is in the shape of a pot or a bowl and is bulged towards one side of the deformation sheet 4, so the deformation sheet 4 is also called a pot sheet.

[0191] Among them, the bulge structure 431 between the first connecting sheet 41 and the second connecting sheet 42 of the deformation sheet 4 is beneficial to improve the overall rigidity of the deformation sheet 4.

[0192] In an example, in order to further improve the overall rigidity of the deformation sheet 4, referring to Figure 11 As shown, the part between the edge of the third connecting sheet 43 and the bulge structure 431 is in the shape of a sheet, and the plane where the sheet is located is not coplanar with the plane where the first connecting sheet 41 is located, so that the first connecting sheet 41 is bent and connected with the sheet area of the third connecting sheet 43. This kind of bending connection can improve the rigidity of the deformation sheet 4.

[0193] Similarly, continuing to refer to Figure 11 As shown, the plane where the sheet area between the edge of the third connecting sheet 43 and the bulge structure 431 is located is not coplanar with the plane where the second connecting sheet 42 is located, so that the second connecting sheet 42 is bent and connected with the sheet area of the third connecting sheet 43, which improves the rigidity of the deformation sheet 4.

[0194] As for the plane where the first connecting sheet 41 is located and the plane where the second connecting sheet 42 is located, they can be coplanar or not. Since the second connecting sheet 42 is pivoted at the first connecting sheet 41 and swings back and forth at high temperature, the plane where the first connecting sheet 41 is located and the plane where the second connecting sheet 42 is located are coplanar.

[0195] In this way, when the temperature is changing, the first metal piece and the second metal piece will both deform, and the deformation of the first metal piece is greater than that of the second metal piece, but because the rigidity of the deformation piece 4 is large, the deformation force of the first metal piece will not cause the second connecting piece 42 to pop open. When the temperature exceeds the set threshold (such as the first temperature threshold), the deformation force of the first metal piece is further increased, and the deformation force of the first metal piece will increase to overcome the rigidity of the entire deformation piece 4, causing the second connecting piece 42 to bend to the second side and pop open relative to the connecting piece 22 of the second wiring structure 2, so that the movable contact on the first side of the second connecting piece 42 is separated from the stationary contact on the connecting piece 22 of the second wiring structure 2.

[0196] It should be noted that the deformation piece 4 can be a bimetallic piece structure, or can be a metal piece formed of a memory alloy material.

[0197] As described above, the overload protection module 400 also has a button 401 for resetting, and by pressing the button 401, the first wiring structure 1 and the second wiring structure 2 can be reset to an electrically connected state when the first wiring structure 1 and the second wiring structure 2 are in a disconnected electrical connection state. Correspondingly, the overload protection module also includes a reset mechanism.

[0198] Next, the features of the reset mechanism are introduced.

[0199] As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring. Figure 12 Figure 12 As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring. Figure 13 Figure 13 As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring.

[0200] As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring. Figure 12 As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring. Figure 5 As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring. Figure 1 As shown in FIG. 4, it is a structural schematic diagram of the overload protection module, and as shown in FIG. 5, the overload protection module also includes a reset mechanism, as shown in FIG. 6, it is a schematic diagram of the reset mechanism, and as shown in FIG. 7, the reset mechanism includes a push rod 5 and an elastic member 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the elastic member 6 is exemplified by a spring.

[0201] ​​It should be noted that the top end of the push rod 5 can also be located inside the plug housing 100 and not exposed, for example, the top end of the push rod 5 is flush with or protrudes from the module housing 3 of the overload protection module, but is located inside the plug housing 100, and 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.

[0202] As shown in Figure 14 , it is a structural schematic diagram of the push rod 5, as shown in Figure 15 and Figure 16 , it is a schematic diagram before and after the push rod 5 is loaded into the bottom shell 31.

[0203] Referring to Figure 14 , the bottom of the push rod 5 has a partition 523, when the button 401 is in a pressed state and the deformation sheet 4 is in a reset state, referring to Figure 12 , the partition 523 is located at the bottom of the bottom shell 31, specifically between the bottom of the bottom shell 31 and the moving contact of the deformation sheet 4, that is, the partition 523 is located directly below the moving contact, so that the static contact on the connecting sheet of the second wiring structure 2 is in contact with the moving contact on the second connecting sheet 42 of the deformation sheet 4. When the button 401 is in an unpressed state and the deformation sheet 4 is in a reset state, the partition 523 is in contact with the static contact and clamped between the moving contact and the static contact, achieving electrical isolation between the moving contact and the static contact.

[0204] For example, the current passing through the line where the overload protection module is connected 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 deformation sheet 4 deforms, that is, the second connecting sheet 42 of the deformation sheet 4 bends and deforms around the first connecting sheet 41 as a fulcrum, causing the moving contact on the deformation sheet 4 to be pushed away 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 a position where the partition 523 of the push rod 5 is opposite to and in contact with the static contact. After the temperature inside the overload protection module cools down, the deformation sheet 4 resets, but at this time the moving contact and the static contact are isolated by the partition 523 of the push rod 5, so the user needs to press the button 401 to move the push rod 5 downward, to a position where the partition 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 restore the contact state, and the overload protection module restores the on state.

[0205] Therefore, under normal circumstances, that is, when the temperature inside the overload protection module does not exceed the temperature threshold that triggers power-off, the reset mechanism causes the movable contact and the fixed contact inside the overload protection module to be combined, and after the temperature inside the overload protection module returns to normal, the movable contact and the fixed contact are not automatically combined, but can be combined again by the technician pressing the 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 the protection of the overload protection module. This is because, since the technician presses the button 401 of the reset mechanism, it means that the circuit in which the overload protection module is located has been repaired and returned to normal, so the overload power-off situation will not occur again in a short period of time.

[0206] Since the button for resetting is usually in the middle position, as shown in Figure 12 , the top of the push rod 5 is approximately in the middle position in the front-rear direction of the bottom shell 31. And 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 in the front-rear direction of the bottom shell 31. Therefore, as shown in Figure 14 , the partition piece 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.

[0207] For example, as shown in Figure 14 , the push rod 5 has a first side rib 521 on the outer surface of the side wall, and the partition piece 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. Wherein, 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 protrudes from the bottom end of the push rod 5, so that the partition piece 523 is located at the bottom.

[0208] Wherein, the first side rib 521 is used to extend the partition piece 523 to the side away from the axial center line of the push rod 5, and is used to be clamped in the bottom shell 31.

[0209] For example, as shown in Figure 15 , the bottom shell 31 has a channel 314 at a position close to the first side wall 311, and the channel 314 is used to limit the elastic member 6 therein to prevent the elastic member 6 from moving laterally during the expansion and contraction movement. The channel wall of the channel 314 has a first channel opening 3141 extending 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 thickness of the channel wall of the channel 314. Then, as shown in Figure 15 , the first side rib 521 can be clamped into the first channel opening 3141, and the partition piece 523 is located outside the channel 314.

[0210] Reference is made to Figure 15As shown, in order to make the first side rib 521 quickly inserted into the first channel opening 3141, correspondingly, the bottom end of the first side rib 521 has a guide structure.

[0211] Continuing to refer to Figure 14 As shown, the side of the push rod 5 also has a second side rib 522, 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.

[0212] Among them, the second side rib 522 is mainly used for clamping in the bottom shell 31.

[0213] For example, referring to Figure 15 As shown, the channel wall of the channel 314 has a second channel opening 3142, 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 thickness of the channel wall of the channel 314. Then, referring to Figure 15 As shown, the second side rib 522 can be clamped into the second channel opening 3142.

[0214] Referring to Figure 15 As shown, in order to make the second side rib 522 quickly inserted into the second channel opening 3142, correspondingly, the bottom end of the second side rib 522 has a guide structure.

[0215] Because the bottom shell 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, in order to make the width of the bottom shell 31 relatively narrow, correspondingly, referring to Figure 15 As shown, the first side rib 521 and the second side rib 522 are arranged in front and back in the front and back direction, for example, in the front and back direction, the first side rib 521 is in front, and the second side rib 522 is behind, compared with the left and right distribution of the first side rib 521 and the second side rib 522 in the width direction, the width of the bottom shell 31 can be shortened.

[0216] 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 at the middle position 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 opposite. For this purpose, referring to Figure 14 As shown, the rod part of the push rod 5 can include a first rod part 51 and a second rod part 52, the second rod part 52 is located at the bottom of the first rod part 51, and the axial center line of the first rod part 51 and the axial center line of the second rod part 52 are parallel but not coincident. After the push rod 5 is installed in the bottom shell 31, the second rod part 52 is closer to the first side wall 311 than the first rod part 51, and the first rod part 51 is located at the middle position between the first side wall 311 and the second side wall 312.

[0217] Based on the distribution of the first rod portion 51 and the second rod portion 52 in the direction perpendicular to the first side wall 311, and the extension of the partition 523 in the direction parallel to the first side wall 311, the plane in which 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 in which the partition 523 is located.

[0218] Based on the second rod portion 52 being at the bottom of the first rod portion 51, the button 401 being at the top end of the push rod 5, the partition 523 being at the bottom of the push rod 5, and the elastic member 6 being compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31, the top end of the first rod portion 51 is the button 401, the partition 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.

[0219] Based on the elastic member 6 being limited in the channel 314 of the bottom shell 31, as shown in Figure 15 and referring to Figure 16 , the second rod portion 52 that presses against 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, the second rod portion 52 extends into the channel 314 and presses against the elastic member 6, and the push rod 5 is pushed to the bottom, i.e., is assembled in the bottom shell 31.

[0220] Referring to Figure 15 , the extension of the second rod portion 52 into the channel 314 is conducive to quickly assembling the push rod 5 into the bottom shell 31 and is conducive to realizing automatic assembly. This is because the cylindrical second rod portion 52 and the channel 314 with a cylindrical inner surface can realize circumferential positioning, and as long as the second rod portion 52 enters the channel 314, the first side rib 521 can be clamped into the first channel opening 3141, the second side rib 522 can be clamped into the second channel opening 3142, and the partition 523 can be clamped into the fourth clamping groove 319.

[0221] Referring to Figure 8 , there is the channel 314 between the deformation sheet 4 and the first side wall 311, and a spacing with a width of H needs to be reserved between the deformation sheet 4 and the second side wall 312 to allow the second connecting sheet 42 of the deformation sheet 4 to bend and deform in the direction close to the second side wall 312. The first rod portion 51 of the push rod 5 is at a middle position between the first side wall 311 and the second side wall 312, and the bottom shell 31 is limited between the first polar plug hole 201 and the second polar plug hole 202. Therefore, referring to Figure 15As shown, the first rod part 51 has a first tangent plane 511 on the side opposite to the second rod part 52, the first tangent plane 511 is parallel to the first side wall 311 and extends from the bottom end of the first rod part 51 to the top end of the first rod part 51, but does not extend to the top end of the first rod part 51 (because the top end of the first rod part 51 also needs to serve as the button 401).

[0222] The side of the channel 314 opposite to the first side wall 311 has a second tangent plane 3143, the second tangent plane 3143 is parallel to the first side wall 311 and extends through the height of the channel 314.

[0223] Then, referring to Figure 12 As shown, the deformation sheet 4 can be located at the first tangent plane 511 and the second tangent plane 3143, after the deformation sheet 4 is loaded into the bottom shell 31, in the thickness direction, the sum of the height of the first tangent plane 511 and the height of the second tangent plane 3143 satisfies greater than the height of the third connecting piece 43 of the deformation sheet 4, so that the top end of the third connecting piece 43 of the deformation sheet 4 does not contact the tangent plane of the first rod part 51 perpendicular to the first tangent plane 511, so as to prevent the tangent plane of the first rod part 51 perpendicular to the first tangent plane 511 from interfering with the bending deformation of the second connecting piece 42 of the deformation sheet 4.

[0224] Because the third connecting piece 43 of the deformation sheet 4 is located at the first tangent plane 511 and the second tangent plane 3143, and the third connecting piece 43 has a planar area, the first tangent plane 511 and the second tangent plane 3143 are coplanar on the same plane.

[0225] Continuing to refer to Figure 12 As shown, after the deformation sheet 4 and the push rod 5 are loaded into the bottom shell 31, the top end of the first connecting piece 41 of the deformation sheet 4 and the connecting piece 12 of the first wiring structure 1 are flush with or retracted to the top end of the bottom shell 31, the top end of the second connecting piece 42 of the deformation sheet 4 and the connecting piece 22 of the second wiring structure 2 are flush with or retracted to the top end of the bottom shell 31, the top end of the third connecting piece 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, then under this high-low relationship, referring to Figure 9 As shown, the upper cover 32 has a shape that is low at both ends and high in the middle.

[0226] Continuing to refer to Figure 9 As shown, the upper cover 32 also has a sleeve 33 that extends through the thickness of the upper cover 32 and communicates with the space in the bottom shell 31, the top end of the push rod 5 extends into the sleeve 33, for example, the first rod part 51 of the push rod 5 extends into the sleeve 33, and 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.

[0227] In order to facilitate the user to press the top end of the push rod 5, accordingly, referring to Figure 1As shown, the top end of the sleeve 33 is flush with the top surface of the plug housing 100, and the top end of the push rod 5 located in the sleeve 33 is exposed on the top surface of the plug housing 100.

[0228] Since the top end of the sleeve 33 is flush with or extends beyond 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 as follows... Figure 1 The shape shown is for reference. Figure 3 As shown, the height of the sleeve 33 is relatively small; for example, the plug housing 100 is as follows: Figure 25 The shape shown is for reference. Figure 26 As shown, the height of sleeve 33 is relatively high.

[0229] Based on the above, when the deformable piece 4 deforms, the second connecting piece 42 springs open relative to the connecting piece 22 of the second wiring structure 2, and the spacer 523 of the push rod 5 moves upward to contact the stationary contact point on the connecting piece 22 of the second wiring structure 2. When the push rod 5 is pressed down, the spacer 523 of the push rod 5 moves downward to the bottom of the bottom shell 31. In this way, the push rod 5 can slide up and down along the thickness direction.

[0230] The first side rib 521 and the second side rib 522 of the push rod 5 are located in the first channel opening 3141 and the second channel opening 3142, respectively. The first rod part 51 of the push rod 5 is located in the sleeve 33 near the top. Therefore, when the push rod 5 slides down along the thickness direction, it is limited by the first channel opening 3141, the second channel opening 3142 and the sleeve 33, so that the push rod 5 is not easy to shake during the up and down sliding movement.

[0231] Furthermore, such as Figure 15 And refer to Figure 16 As shown, the bottom of the bottom shell 31 has a fourth slot 319 for limiting the spacer 523. When the spacer 523 moves down, it is locked into the fourth slot 319, and the spacer 523 is restricted from shaking by the fourth slot 319.

[0232] Referring to Figure 15, the fourth slot 319 has a funnel-shaped opening so that the spacer 523 can smoothly engage in the fourth slot 319 when the button 401 (i.e., the top of the push rod 5) is pressed, making it less likely for the button 401 to get stuck.

[0233] Because the elastic element 6 is compressed between the second rod portion 52 of the push rod 5 and the bottom of the bottom shell 31, if the elastic element 6 is installed first during assembly, it may push the push rod 5 open, making assembly difficult and hindering automated assembly. Therefore, the elastic element 6 can be installed into the bottom shell 31 after the upper cover 32 and the bottom shell 31 are assembled. Figure 17As shown, the bottom of the bottom shell 31 has a mounting hole 315 at the position corresponding to the passage 314. After the upper cover 31 and the bottom shell 31 are fixed, the overload protection module is turned over, the elastic member 6 is installed into the passage 314 inside the bottom shell 31 from the mounting hole 315 at the bottom of the bottom shell 31, and then the mounting hole 315 is blocked by using the blocking plug 7. At this time, the elastic member 6 is compressed between the push rod 5 and the blocking plug 7.

[0234] Since the bottom of the bottom shell 31 is fixed in the plug shell 100, even if the interference effect of the blocking plug 7 with the mounting hole 315 is weak, the elastic member 6 will not fall off from the mounting hole 315 at the bottom of the bottom shell 31.

[0235] In an example, in order to enable the blocking plug 7 to be interference-fitted into the mounting hole 315, the blocking plug 7 can be compressed so as to be interference-fitted into the mounting hole 315. For example, the blocking plug 7 can be a rubber plug and has a certain elasticity, which can be compressed so as to be interference-fitted into the mounting hole 315.

[0236] Further referring to Figure 18 As shown, the inner end face of the blocking plug 7 facing the passage 314 has a groove 71, and the groove 71 has a groove opening facing the elastic member 6, and the elastic member 6 abuts against the end face where the groove opening of the groove 71 is located. The groove 71 enables the blocking plug 7 to be shrunk when being interference-fitted into the mounting hole 315, so as to be interference-fitted into the mounting hole 315.

[0237] Further referring to Figure 17 and Figure 18 As shown, the bottom outer surface of the bottom shell 31 is provided with an annular protruding rib 316 along the mounting hole 315, and the annular protruding rib 316 is used to extend the axial length of the mounting hole 315.

[0238] In order to enable the blocking plug 7 to be interference-fitted into the annular space of the annular protruding rib 316, referring to Figure 17 As shown, the annular protruding rib 316 has a plurality of openings 3161 penetrating the thickness and height of the annular protruding rib 316, and these openings 3161 are used to reduce the rigidity of the annular protruding rib 316, and these openings 3161 can be uniformly arranged along the annular direction. Then when the blocking plug 7 is interference-fitted, the annular protruding rib 316 is expanded along the radial direction, so as to interference-fit the blocking plug 7 into the mounting hole 315 and the annular protruding rib 316.

[0239] Herein, the height direction of the annular protruding 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 hole 315.

[0240] In an example, since the elastic member in the compressed state abuts against the blocking plug 7, the blocking plug 7 may fall off from the annular protruding rib 316 and the annular space. Therefore, in order to avoid the blocking plug 7 from falling off from the annular protruding rib 316 and the openings, correspondingly, as shown inFigure 18 As shown, the 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 along the axial direction of the mounting opening 315. Similarly, the diameter of the sealing plug 7 gradually increases from the outside of the bottom shell 31 to the inside of the bottom shell 31 along the axial direction of the sealing plug 7. Therefore, referring to... Figure 18 As shown, the cross-sectional shape of the sealing plug 7 is an inverted trapezoid. The sealing plug 7 is similar to a barb that seals the annular protrusion 316 and the mounting opening 315, making the sealing plug less likely to fall off.

[0241] refer to Figure 17 As shown, the mounting opening 315 is circular. Therefore, the two end faces of the sealing plug 7 along its circumferential center line are also circular. Since the cross-sectional shape of the sealing plug 7 is an inverted trapezoid, the sealing plug 7 is a frustum of a cone. A frustum is the portion between the base of the cone and the cross-section formed by cutting the cone with a plane parallel to its base. Therefore, refer to... Figure 18 As shown, the frustum-shaped sealing plug 7 has its bottom surface facing the channel 314 of the bottom shell 31, the elastic member 6 abutting against the bottom surface, and the cross section of the sealing plug 7 facing outward from the bottom shell 31, for example, flush with or contracted to the outer end face of the annular rib 316.

[0242] Thus, for reference Figure 18 As shown, the sealing plug 7 is subjected to the downward force of the elastic element 6 and the upward support force from the annular rib 316. The annular rib 316 acts to resist the elastic element, making the sealing plug 7 less likely to fall off.

[0243] In one example, to facilitate the insertion of the sealing plug 7 into the annular rib 316 and the opening, the corresponding reference is made... Figure 18 As shown, the annular rib 316 has a first guide structure at the opening away from the channel 314 (i.e., there is a chamfer between the end face of the annular rib 316 and the inner surface), and the sealing plug 7 has a second guide structure at the end near the mounting groove (i.e., there is a chamfer between the bottom surface of the sealing plug 7 and the side surface). Then, with the cooperation of the first guide structure and the second guide structure, and with the radial expansion of the annular rib 316, and with the contraction of the sealing plug 7, the sealing plug 7 is interfering with the channel formed by the inner surface of the mounting opening 315 and the inner surface of the annular rib 316.

[0244] In one example, refer to Figure 17 As shown, since the annular rib 316 protrudes relative to the bottom outer surface of the housing 61, in order to stably fix the overload protection module on the pin bracket 200, the inner surface of the pin bracket 200 has a groove 205 (see reference). Figure 2As shown in FIG. 6, the overload protection module is fixed on the latch bracket 200, and the annular protrusion 316 is located in the sink 205, so that the bottom outer surface of the overload protection module is stably attached to the inner surface of the latch bracket 200.

[0245] In addition, referring to Figure 17 As shown in FIG. 6, the outer surface of the annular protrusion 316 forms a cylindrical surface, and the inner surface of the sink 205 on the first surface of the latch bracket 200 also forms a cylindrical surface.

[0246] In order to stably fix the bottom shell 31 on the first surface of the latch bracket 200, the height of the annular protrusion 316 protruding from the outer surface of the bottom shell 31 is less than or equal to the groove depth of the sink 205.

[0247] The above is the structural features of the overload protection module. The assembly process of the overload protection module will be introduced based on the features of the overload protection module.

[0248] Step one, assemble the push rod 5 into the bottom shell 31.

[0249] Referring to Figure 15 and Figure 16 As shown in FIG. 6, align the second rod portion 52 of the push rod 5 with the channel 314, the first side rib 521 extends into the first channel opening 3141 of the channel 314, and the second side rib 522 extends 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 clamping groove 319, and the bottom end of the spacer 523 is in contact with the bottom surface of the bottom shell 31.

[0250] Step two, assemble the fixed deformation sheet 4 and the first wiring structure 1 into the bottom shell 31.

[0251] Specifically, referring to Figure 19 and Figure 20 As shown in FIG. 6, after the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 are fixed, they are assembled together into the third clamping groove 313, and the transition sheet 13 of the first wiring structure 1 is clamped into the first clamping groove 3111.

[0252] The fixing steps of the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 can be performed before step one, or after step one and before step two.

[0253] Step three, assemble the second wiring structure 2 into the bottom shell 31.

[0254] Specifically, as Figure 21 and referring to Figure 22As shown, the clamping slot 231 on the transition sheet 23 of the second wiring structure 2 is clamped into the second clamping slot 3112 on the first side wall 311, and when inserted to the bottom, the assembly of the second wiring structure 2 in the bottom shell 31 is completed.

[0255] Step four, as shown in Figure 22 The upper cover 32 of the module shell 3 is installed on the top end of the bottom shell 31.

[0256] Specifically, referring to Figure 22 As shown, some second positioning structures 323 (such as cylinders) at the bottom end of the upper cover 32 are inserted into some first positioning structures 317 (such as square holes) on the top end of the bottom shell 31 one by one, that is, the assembly of the upper cover 32 and the bottom shell 31 is completed. After the assembly of the upper cover 32 and the bottom shell 31 is completed, referring to Figure 9 As shown, the first protruding structure 321 at the bottom of the upper cover 32 is pressed against the top end of the transition sheet 13 of the first wiring structure 1, and the second protruding structure 322 at the bottom of the upper cover 32 is pressed against the top end of the transition sheet 23 of the second wiring structure 2.

[0257] Step five, the elastic member 6 is loaded into the bottom shell 31 from the installation port 315 at the bottom of the bottom shell 31.

[0258] Specifically, first, the overload protection module is turned over, referring to Figure 23 As shown, the bottom of the bottom shell 31 is upward, and the top of the upper cover 32 is downward, and then the elastic member 6 is loaded into the bottom shell 31 from the installation port 315 at the bottom of the bottom shell 31.

[0259] Step six, referring to Figure 24 As shown, the plug 7 is inserted into the installation port 315 to compress the elastic member 6 loaded in the installation port 315 in the bottom shell 31.

[0260] As can be seen from the above, in the assembly of the overload protection module, most of them involve clamping, and the assembly process is relatively simple, which is conducive to realizing automatic assembly and improving assembly efficiency.

[0261] It should be noted that because the deformation sheet 4 has a relatively thin thickness and has a certain elasticity, the deformation sheet 4 and the first wiring structure 1 can also be loaded into the bottom shell as a whole, and then the push rod 5 is loaded into the bottom shell. Then, when the push rod 5 is loaded, the second wiring end 42 of the deformation sheet 4 needs to be bent open to allow the partition sheet 523 of the push rod 5 to move downward to contact the inner surface of the bottom shell 31.

[0262] After the overload protection module is assembled, the overload protection module is assembled on the first surface of the bolt bracket 200. Referring to Figure 2 As shown, the first surface of the bolt bracket 200 has a circular groove 205 and a plurality of fourth positioning structures 206, and referring to Figure 24As shown, the bottom of the overload protection module has an annular rib 316 and multiple third positioning structures 318. The annular rib 316 at the bottom of the overload protection module is inserted into the recess 205, and the multiple fourth positioning structures 206 cooperate with their corresponding third positioning structures 318. (Refer to...) Figure 4 As shown, the overload protection module can be assembled on the first surface of the pin bracket 200.

[0263] 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 can be a cylinder, and the fourth positioning structure 206 can be a square hole. The square hole has a guiding structure, and the end face of the cylinder is spherical, to achieve rapid assembly and improve assembly efficiency.

[0264] After the overload protection module 400 is assembled on the first surface of the pin bracket 200, as shown in the figure Figure 3 Based on the above, an encapsulation process is performed to form the plug housing 100.

[0265] The shape of a plug housing 100 can be referenced. Figure 1 As shown, a flat, columnar structure encloses both the pin bracket 200 and the overload protection module 400, while the pin assembly extends out of the plug housing 100. 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.

[0266] Continue to refer to Figure 1 As shown, the plug housing 100 has symmetrical cross-sections on the left and right sides about the center line. These two cross-sections are designed to make it easier for the user to pick up the plug.

[0267] Another plug housing 100 shape reference Figure 25 As shown, the plug housing 100 mainly comprises two parts: one part covers the pin bracket and the other part covers the overload protection module 400. The part covering the pin bracket 200 is called the horizontal part, and the part covering the overload protection module 400 is called the vertical part.

[0268] In one example, to adapt to such Figure 25 The height of the plug housing 100 shown is for reference. Figure 26 As shown, the sleeve 33 at the top of the module housing 3 of the overload protection module 400 is axially perpendicular to the pin bracket 200. The top end of the push rod 5 extends out of the sleeve 33. The sleeve 33 is relatively high, which is used to extend the height of the plug in the thickness direction.

[0269] Continue to refer to Figure 25As shown, the left and right sides of the vertical part of the plug shell 100 have bulge structures 101, and the bulge structures 101 on the left and right sides of the vertical part are symmetrically distributed about the center line of the plug, for facilitating the user to hold the plug.

[0270] It should be noted that the length of the bulge structure 101 in the front-rear direction of the plug is related to the length dimension L occupied by the part of the first wiring structure 1 of the overload protection module 400 extending out of the module shell 3 and the part of the second wiring structure 2 extending out of the module shell 3 in the front-rear direction. The length dimension L occupied by the first wiring structure 1 and the second wiring structure 2 in the front-rear direction can be referred to Figure 26 as shown.

[0271] Continuing to refer to Figure 26 As shown, the outer surface of the bulge structure 101 has an inwardly recessed cylindrical surface, which facilitates the user to hold.

[0272] In the embodiments of the present disclosure, the overload protection module is integrated in the plug, and when the current on the circuit where the plug is located is too large, the overload protection module disconnects the circuit where the plug is located, so as to improve the safety of electricity use. Moreover, the overload protection module is integrated in the plug, and therefore, the overload protection module does not need to be arranged in the socket where the plug is inserted, so that the internal space of the socket can be saved, and more plug holes can be arranged in the socket.

[0273] Moreover, the overload protection module is integrated in the idle area originally existing between the first pole plug pin and the second pole plug pin of the plug, so that the overload protection module is integrated in the plug without changing the shape and size of the plug.

[0274] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An overload protection module, characterized in that, The overload protection module comprises a module shell (3), a first wiring structure (1), a second wiring structure (2), a deformation sheet (4), a reset mechanism and a blocking plug (7); Part of the first wiring structure (1) and the second wiring structure (2) is located in the module shell (3), and the other part is outside the module shell (3), the deformation sheet (4) and the reset mechanism are located in the module shell (3), and the first wiring structure (1) and the second wiring structure (2) are electrically connected and disconnected; The reset mechanism comprises a push rod (5) and an elastic member, the module shell (3) comprises a bottom shell (31) and an upper cover (32), the push rod (5) is installed in the bottom shell (31) through the opening at the top of the bottom shell (31), the bottom of the bottom shell (31) has a mounting port (315) at the position corresponding to the push rod (5), the elastic member (6) is installed in the bottom shell (31) through the mounting port (315), the blocking plug (7) is blocked in the mounting port (315), and the elastic member (6) is compressed between the push rod (5) and the blocking plug (7).

2. The overload protection module of claim 1, wherein, The shape of the blocking plug (7) is a circular truncated cone, the inner surface of the mounting port (315) is fitted with the outer surface of the blocking plug (7), and the bottom surface of the blocking plug (7) faces the inside of the bottom shell (31), and the cross section of the blocking plug (7) faces the outside of the bottom shell (31).

3. The overload protection module of claim 2, wherein, The bottom surface of the blocking plug (7) has a guide angle between the bottom surface and the side surface.

4. The overload protection module of claim 2, wherein, The bottom surface of the blocking plug (7) has a groove (71), and the groove (71) is located on the bottom surface of the blocking plug (7).

5. The overload protection module of claim 2, wherein, The bottom surface of the bottom shell (31) has an annular convex rib (316) surrounding the mounting port (315); The inner surface of the mounting port and the inner surface of the annular convex rib (316) are fitted with the outer surface of the blocking plug (7).

6. The overload protection module of claim 5, wherein, The inner surface of the annular convex rib (316) and the outer end surface outside the bottom shell (31) have a guide angle.

7. The overload protection module of claim 5, wherein, The annular convex rib (316) has a plurality of openings penetrating the ring wall thickness of the annular convex rib (316).

8. The overload protection module of claim 5, wherein, The outer surface of the annular convex rib (316) is a cylindrical surface.

9. The overload protection module of claim 5, wherein, The annular convex rib (316) is used to be installed in the sink groove (205) on the surface of the plug holder (200) of the overload protection module, and the height of the annular convex rib (316) is less than or equal to the groove depth of the sink groove (205).

10. A plug, characterized by The plug comprises a plug shell (100), a plug holder (200), a plug assembly and the overload protection module (400) of any one of claims 1 to 9; The plug holder (200) has a first pole socket (201) and a second pole socket (202) on both sides of the center line, the plug assembly comprises a first pole plug (301) and a second pole plug (302), the first pole plug (301) is fixed in the first pole socket (201), and the second pole plug (302) is fixed in the second pole socket (202); The plug pin support (200) and the overload protection module (400) are located in the plug shell (100), the overload protection module (400) is fixed on the first surface of the plug pin support (200) and located between the first pole plug hole (201) and the second pole plug hole (202), the bottom outer surface of the module shell (3) and the blocking plug (7) are both faced to the plug pin support (200); The overload protection module (400) is electrically connected with the first pole plug pin (301) and the first pole wire of the power line through the wiring ends of the first wiring structure (1) and the second wiring structure (2) located outside the module shell (3).

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