Deformation sheet, overload protection module and plug

Abstract

The utility model relates to a deformation sheet, an overload protection module and a plug, and belongs to the technical field of power supplies. The deformation sheet comprises a first connecting sheet, a second connecting sheet and a third connecting sheet; the third connecting piece is provided with a bulge structure, and the bulge structure bulges towards one side of the third connecting piece in the thickness direction of the third connecting piece; the deformation sheet is used for deforming when the temperature is higher than a first temperature threshold value and resetting when the temperature is not higher than the first temperature threshold value; wherein the deformation piece is applied to the overload protection module, the first connecting piece is used for being electrically connected with a first wiring structure of the overload protection module, the second connecting piece is used for being electrically connected with a second wiring structure of the overload protection module, and under the condition that the temperature is higher than a first temperature threshold value, the deformation piece deforms; under the condition that the temperature is not higher than the first temperature threshold value, the deformation piece is reset, and the first wiring structure and the second wiring structure are electrically connected. According to the invention, the electricity utilization safety can be improved.

Description

[0001] The present application claims priority from the Chinese patent application No. 202411427204.3 filed on October 12, 2024 and entitled "Plug", the whole 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 a deformation sheet, an overload protection module and a plug. BACKGROUND

[0003] With the improvement of people's living standards, people's demand for electricity is growing. As a common power supply device in the 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 experience overload during the use of the socket. After 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 a deformation sheet, an overload protection module and a plug. The technical solution is as follows:

[0006] In a first aspect, the present disclosure provides a deformation sheet, which comprises a first connecting sheet, a second connecting sheet and a third connecting sheet connected between the first connecting sheet and the second connecting sheet.

[0007] The third connecting sheet has a bulge structure, which bulges to one side of the third connecting sheet in the thickness direction of the third connecting sheet.

[0008] The deformation sheet is used to bend and deform when the temperature is higher than a first temperature threshold, and reset when the temperature is not higher than the first temperature threshold.

[0009] The deformation sheet is applied in an overload protection module, the first connecting sheet is used to be electrically connected with a first wiring structure of the overload protection module, the second connecting sheet is used to be electrically connected with a second wiring structure of the overload protection module, and when the temperature is higher than the first temperature threshold, the deformation sheet bends and deforms to disconnect the first wiring structure and the second wiring structure, and when the temperature is not higher than the first temperature threshold, the deformation sheet resets to electrically connect the first wiring structure and the second wiring structure.

[0010] Optionally, the deformation sheet is used to bend and deform to one side of the deformation sheet when the temperature is higher than the first temperature threshold.

[0011] Optionally, the first connecting piece is fixedly connected with the first wiring structure of the overload protection module, and the movable contact of the overload protection module is arranged on the surface of the first connecting piece on the first side;

[0012] In the case that the temperature is higher than the first temperature threshold, the second connecting piece is bent to the second side of the deformation piece, so that the movable contact arranged on the second connecting piece is separated from the fixed contact arranged on the second wiring structure, wherein the first side and the second side are opposite in the thickness direction of the deformation piece.

[0013] In the case that the temperature is not higher than the first temperature threshold, the second connecting piece is reset, so that the movable contact arranged on the second connecting piece is in contact with the fixed contact arranged on the second wiring structure.

[0014] Optionally, the part between the edge of the third connecting piece and the bulge structure is in the shape of a sheet, and the plane thereof is parallel to and not coplanar with the plane of the first connecting piece.

[0015] Optionally, the part between the edge of the third connecting piece and the bulge structure is in the shape of a sheet, and the plane thereof is parallel to and not coplanar with the plane of the second connecting piece.

[0016] Optionally, the plane of the first connecting piece and the plane of the second connecting piece are coplanar.

[0017] Optionally, the shape of the bulge structure is spherical, bowl-shaped or pot-shaped.

[0018] Optionally, the deformation piece is a bimetallic piece, comprising a first metal piece and a second metal piece, and the thermal expansion coefficient of the first metal piece is greater than the thermal expansion coefficient of the second metal piece.

[0019] The movable contact of the overload protection module is arranged on the surface of the first metal piece.

[0020] In a second aspect, an overload protection module is provided, which comprises a module housing, a first wiring structure, a second wiring structure and the deformation piece of any one of the first aspect.

[0021] The connecting piece of the first wiring structure, the connecting piece of the second wiring structure and the deformation piece are all located in the module housing.

[0022] The wiring end of the first wiring structure and the wiring end of the second wiring structure are both located outside the module housing, the wiring end of the first wiring structure is used for electrically connecting with the first pole plug, and the wiring end of the second wiring structure is used for electrically connecting with the first pole wire of the power line.

[0023] In a third aspect, a plug is provided, comprising a plug shell, a plug pin holder, a plug pin assembly, and the overload protection module of the second aspect;

[0024] The plug pin holder has a first pole socket and a second pole socket on both sides of the center line, the plug pin assembly comprises a first pole plug pin and a second pole plug pin, the first pole plug pin is fixed in the first pole socket, and the second pole plug pin is fixed in the second pole socket and used for electrically connecting the second pole wire of the power line;

[0025] The plug pin holder and the overload protection module are both located in the plug shell, and the overload protection module is fixed on the first surface of the plug pin holder and located between the first pole socket and the second pole socket.

[0026] In the scheme shown in the present disclosure, the third connecting sheet of the deformation sheet has a bulge structure, which can improve the rigidity of the deformation sheet, so that the deformation sheet deforms only when the temperature reaches the first temperature threshold, and the electrical connection inside the overload protection module is disconnected.

[0027] Moreover, 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, so that 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 sockets can be arranged in the socket. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description 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 creative labor.

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

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

[0031] Figure 3 is a schematic diagram of an overload protection module before being mounted on the first surface of a plug pin holder provided by an exemplary embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of an overload protection module and a plug pin assembly mounted on a plug pin holder provided by an exemplary embodiment of the present disclosure;

[0033] Figure 5 Another perspective view of the overload protection module and the latch assembly mounted on the latch bracket according to an example embodiment of the present disclosure;

[0034] Figure 6 A schematic view of the second wiring structure before and after formation according to an example embodiment of the present disclosure;

[0035] Figure 7 A schematic view of the deformation sheet, the first wiring structure, and the second wiring structure before being loaded into the module housing according to an example embodiment of the present disclosure;

[0036] Figure 8 A schematic view of the deformation sheet, the first wiring structure, and the second wiring structure after being loaded into the bottom case according to an example embodiment of the present disclosure;

[0037] Figure 9 A schematic view of the structure of the overload protection module according to an example embodiment of the present disclosure;

[0038] Figure 10 A schematic view of the deformation sheet, the first wiring structure, and the second wiring structure after being loaded into the bottom case according to an example embodiment of the present disclosure;

[0039] Figure 11 A schematic view of the structure of the deformation sheet according to an example embodiment of the present disclosure;

[0040] Figure 12 A schematic view of the deformation sheet, the first wiring structure, the second wiring structure, and the push rod after being loaded into the bottom case according to an example embodiment of the present disclosure;

[0041] Figure 13 A schematic view of the reset mechanism according to an example embodiment of the present disclosure;

[0042] Figure 14 A schematic view of the structure of the push rod according to an example embodiment of the present disclosure;

[0043] Figure 15 A schematic view of the push rod before being loaded into the bottom case according to an example embodiment of the present disclosure;

[0044] Figure 16 A schematic view of the push rod after being loaded into the bottom case according to an example embodiment of the present disclosure;

[0045] Figure 17 A schematic view of the bottom of the bottom case according to an example embodiment of the present disclosure;

[0046] Figure 18Figure 1 is a schematic view of the elastic member and the sealing plug in the bottom shell according to an exemplary embodiment of the present disclosure;

[0047] Figure 19 Figure 2 is a schematic view of the fixed deformation sheet and the first wiring structure before being assembled into the bottom shell according to an exemplary embodiment of the present disclosure;

[0048] Figure 20 Figure 3 is a schematic view of the fixed deformation sheet and the first wiring structure after being assembled into the bottom shell according to an exemplary embodiment of the present disclosure;

[0049] Figure 21 Figure 4 is a schematic view of the second wiring structure before being assembled into the bottom shell according to an exemplary embodiment of the present disclosure;

[0050] Figure 22 Figure 5 is a schematic view of the upper cover before being assembled to the bottom shell according to an exemplary embodiment of the present disclosure;

[0051] Figure 23 Figure 6 is a schematic view of the elastic member being assembled into the bottom shell from the installation opening at the bottom of the bottom shell according to an exemplary embodiment of the present disclosure;

[0052] Figure 24 Figure 7 is a schematic view of the sealing plug being inserted into the installation opening according to an exemplary embodiment of the present disclosure;

[0053] Figure 25 Figure 8 is a schematic view of another plug shell according to an exemplary embodiment of the present disclosure;

[0054] Figure 26 Figure 9 is a schematic view of another overload protection module according to an exemplary embodiment of the present disclosure.

[0055] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0056] 100 plug shell; 101 bulge structure on the plug shell.

[0057] 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.

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

[0059] 301 first pole plug pin; 302 second pole plug pin; 303 third pole plug pin.

[0060] 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.

[0061] 400 overload protection module; 401 button.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 3 module housing; 31 bottom shell; 32 upper cover; 33 sleeve.

[0066] 311 first side wall; 312 second side wall; 313 third clamping groove; 314 passage; 315 mounting port; 316 annular protruding rib; 317 first positioning structure; 318 third positioning structure; 319 fourth clamping groove.

[0067] 3111 first clamping groove; 3112 second clamping groove; 3141 first passage opening; 3142 second passage opening; 3143 second flat cutting surface; 3161 opening on the annular protruding rib.

[0068] 321 first protruding structure; 322 second protruding structure; 323 second positioning structure.

[0069] 4 deformation piece; 41 first connecting piece; 42 second connecting piece; 43 third connecting piece; 431 bulge structure on the deformation piece.

[0070] 5 push rod; 51 first rod part; 52 second rod part.

[0071] 511 first flat cutting surface; 521 first side rib; 522 second side rib; 523 partition piece.

[0072] 6 elastic member.

[0073] 7 sealing plug; 71 recess. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in combination with the drawings.

[0075] The plug of 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 of the present embodiment can be a plug with a power cord or a plug without a power cord. The plug of the present embodiment can be a plug with two pins, i.e., a first pin and a second pin, or a plug with three pins, i.e., a first pin, a second pin, and a third pin.

[0076] In a three-phase alternating current, the first pin is connected to a live wire, and is also referred to as an L pin, the second pin is connected to a neutral wire, and is also referred to as an N pin, and the third pin is connected to an earth wire, and is also referred to as an E pin or a ground pin.

[0077] The plug of the present embodiment is integrated with an overload protection module, and is also referred to as 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.

[0078] The plug of the present embodiment is integrated with an overload protection module, and is also referred to as 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.

[0079] The structure of the plug of the present embodiment will be described in detail below.

[0080] As shown in FIG. 1, the plug is a structure schematic diagram of the plug. Figure 1 As shown in FIG. 2, the plug is a plug with a power cord, and the power cord is not shown in its entirety. As shown in FIG. 3, the plug is a structure schematic diagram of a pin holder of the plug. Figure 1 As shown in FIG. 4, the plug is a structure schematic diagram of the pin holder with an overload protection module arranged thereon. Figure 2 As shown in FIG. 4, the plug is a structure schematic diagram of the pin holder with an overload protection module arranged thereon. Figure 3 As shown in FIG. 4, the plug is a structure schematic diagram of the pin holder with an overload protection module arranged thereon.

[0081] As shown in FIG. 5, the plug includes a plug housing 100, a pin holder 200, a pin assembly, and an overload protection module 400. The pin holder 200 is in a plate shape and has pin holes penetrating through the thickness thereof. If the plug is a plug with two pins, the pin holder 200 has a first pin hole 201 for assembling a first pin 301, and a second pin hole 202 for assembling a second pin 302. Figures 1 to 4 As shown in FIG. 6, the pin holder 200 is a structure schematic diagram of the pin holder 200.

[0082] As shown in FIG. 7, the pin holder 200 is a structure schematic diagram of the pin holder 200. Figure 2As shown, the first pole socket 201 and the second pole socket 202 are symmetrically arranged about the center line of the plug holder 200, where the center line of the plug holder 200 is a straight line parallel to the outgoing direction of the power line and passing through the center position of the plug holder 200.

[0083] If the plug is a three-pin plug, the plug holder 200 also has a third pole socket 203 for assembling a third pole pin 303, also known as an E pole socket or a ground pole socket. Referring to Figure 2 As shown, the third pole socket 203 is located on the center line of the plug holder 200.

[0084] In this embodiment, for ease of introduction, a three-pin plug example is shown in Figure 3 As shown.

[0085] Referring to Figure 3 As shown, the first pole pin 301 is fixed in the first pole socket 201, and a part of the first pole pin 301 protrudes from the first surface of the plug holder 200 (referred to as the front surface of the plug holder 200), and another part protrudes from the second surface of the plug holder 200 (referred to as the back surface of the plug holder 200), the first surface and the second surface are opposite positions.

[0086] Continuing 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 protrudes from the first surface of the plug holder 200, and another part protrudes from the second surface of the plug holder 200.

[0087] Continuing 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 protrudes from the first surface of the plug holder 200, and another part protrudes from the second surface of the plug holder 200.

[0088] Referring to Figure 3 As shown, the part of the first pole pin 301, the second pole pin 302 and the third pole pin 303 protruding from the first surface of the plug holder 200 has a terminal, respectively referred to as the terminal 3011 of the first pole pin 301, the terminal 3021 of the second pole pin 302 and the terminal 3031 of the third pole pin 303.

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

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

[0091] As shown in Figure 2 and referring to Figure 5 As shown, the area surrounded by the first pole socket 201, the second pole socket 202, the third pole socket 203 and the above-mentioned first position is a free area inside the plug, and the overload protection module is arranged in the free area, so that the overload protection module can be integrated in the plug without changing the shape and size of the plug, and the plug has an overload protection function.

[0092] As shown in Figure 5 and referring to Figure 1 As shown, the plug pin holder 200 and the overload protection module 400 are both located in the plug shell 100, and the part of the first pole pin 301 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the pin part) also extends out of the plug shell 100, the part of the second pole pin 302 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the pin part) also extends out of the plug shell 100, and the part of the third pole pin 303 that extends out of the second surface of the plug pin holder 200 (which can be referred to as the pin part) also extends out of the plug shell 100. The pin parts of the three pins that extend out of the plug shell 100 are used to be inserted into the three sockets of the socket to realize power taking.

[0093] Continuing to refer to Figure 1 and Figure 5 As shown, the part of the first pole pin 301 that extends out of the first surface of the plug pin holder 200, the part of the second pole pin 302 that extends out of the first surface of the plug pin holder 200, and the part of the third pole pin 303 that extends out of the first surface of the plug pin holder 200 are all located in the plug shell 100.

[0094] As mentioned above, the first pole pin 301 is connected to the live wire, the second pole pin 302 is connected to the zero line, and the live wire is a live line, while the zero line is not live and 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 pin 301 and the first pole wire of the power supply line.

[0095] Correspondingly, the overload protection module 400 comprises two wiring structures, one of which is used to connect with the first-pole plug-in 301, and the other of which is used to connect with the first-pole wire of the power cord extending into the plug housing 100. Referring to Figure 5 As shown, the wiring structure used to connect with the first-pole plug-in 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 cord is referred to as the second wiring structure 2.

[0096] Then, continuing to refer to Figure 5 As shown, the overload protection module 400 comprises a module housing 3, the first wiring structure 1 has a wiring end 11 extending out of the module housing 3, the part of the first-pole plug-in 301 extending out of the first surface of the plug-in support 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-in 301.

[0097] Continuing to refer to Figure 5 As 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 used to connect with the second-pole wire of the power cord.

[0098] 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 plug-in 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 plug-in 301.

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

[0100] In application, in the case that the circuit connected by 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 of the overload protection module are located 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. In the case that the circuit connected by the plug is normally operated, the current value on the circuit where the first wiring structure 1 and the second wiring structure 2 of the overload protection module are located 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 remain electrically connected.

[0101] In one example, when the temperature is high, the first wiring structure 1 and the second wiring structure 2 are automatically disconnected. When the temperature is low, the first wiring structure 1 and the second wiring structure 2 are automatically connected. In order to ensure safety, the first wiring structure 1 and the second wiring structure 2 can be switched to the connected state by the reset button when the temperature is low.

[0102] Accordingly, referring to Figure 5 the overload protection module has a button 401, which is also called a reset button, referring to Figure 1 exposed on the top of the plug housing 100. Then, when the button 401 is in the pressed state, the first wiring structure 1 and the second wiring structure 2 are in the connected state (i.e., the electrically connected state), and when the button 401 is in the popped-up state, the first wiring structure 1 and the second wiring structure 2 are in the disconnected state (i.e., the electrically disconnected state).

[0103] As described above, the first wiring structure 1 of the overload protection module is used to be connected with the first-pole plug-in 301, and then, in order to facilitate the connection between the wiring end 11 of the first wiring structure 1 and the wiring end 3011 of the first-pole plug-in 301, the part of the first wiring structure 1 that extends out of the module housing 3, i.e., the wiring end 11 of the first wiring structure 1, can be located on the same side of the module housing 3 as the first-pole plug-in 301.

[0104] As for the part of the second wiring structure 2 of the overload protection module that extends out of the module housing 3, i.e., the wiring end 21 of the second wiring structure 2, it can be located on the same side of the module housing 3 as the wiring end 11 of the first wiring structure 1, or on the opposite side of the module housing 3 as the wiring end 11 of the first wiring structure 1.

[0105] However, since the wiring end 21 of the second wiring structure 2 is used to be connected with the first-pole wire of the power cord, and the second-pole plug-in 302 is used to be connected with the second-pole wire of the power cord, if the wiring end 21 of the second wiring structure 2 is located on the same side of the module housing 3 as the second-pole plug-in 302, it will be easy to cause the first-pole wire and the second-pole wire to be connected in series and short-circuit.

[0106] Therefore, referring to Figure 5 the wiring end 21 of the second wiring structure 2 is also located on the same side of the module housing 3 as the first-pole plug-in 301, and the module housing 3 is located between the first-pole plug-in 301 and the second-pole plug-in 302, so that the wiring end 21 of the second wiring structure 2 can be located on the opposite side of the module housing 3 as the second-pole plug-in 302, thereby reducing the probability of the first-pole wire and the second-pole wire of the power cord being connected in series.

[0107] Since the connection terminals 11 of the first connection structure 1 and the connection terminals 21 of the second connection structure 2 are both located on the same side of the module housing 3 as the first-pole plug 301, as shown in FIG. 8, the connection terminals 11 of the first connection structure 1 and the connection terminals 21 of the second connection structure 2 are both on the left side of the module housing 3. Figure 5

[0108] Considering that the connection terminals 11 of the first connection structure 1 are used to be connected with the first-pole plug 301, and the first-pole plug 301 is located in the first-pole plug hole 201 which is an idle area in the plug for the power cord, the connection terminals 21 of the second connection structure 2 are farther away from the power cord than the connection terminals 11 of the first connection structure 1, which can also be understood as, as shown in FIG. 8, in the front-to-back direction parallel to 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 connection terminals 21 of the second connection structure 2 are in front, and the connection terminals 11 of the first connection structure 1 are in back. Figure 5

[0109] As shown in FIG. 8, the connection terminals 21 of the second connection structure 2 are in front of the connection terminals 11 of the first connection structure 1, and the connection terminals 21 of the second connection structure 2 and the connection terminals 3021 of the second-pole plug 302 are located on different sides of the module housing 3, and the positions of the connection terminals 3021 of the second-pole plug 302 and the connection terminals 11 of the first connection structure 1 are symmetrical about the module housing 3, so, as shown in FIG. 8, the connection terminals 21 of the second connection structure 2 and the connection terminals 3021 of the second-pole plug 302 are diagonally distributed and far apart. Figure 5 Figure 5 As shown in FIG. 8, the connection terminals 21 of the second connection structure 2 and the connection terminals 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 connection terminals 21 of the second connection structure 2 and the second-pole wire (i.e., the N-pole wire) of the power cord connected to the connection terminals 3021 of the second-pole plug 302 are far apart, and it is not easy to have a connection, so, as shown in FIG. 8, the arrangement of the connection terminals 11 of the first connection structure 1 and the connection terminals 21 of the second connection structure 2 is beneficial to improve the safety of the application of the plug. Figure 5

[0110] Since the connection terminals 11 of the first connection structure 1 and the connection terminals 21 of the second connection structure 2 are located on the same side of the module housing 3 and are distributed in front and back along the module housing 3, in order to facilitate the connection of the connection terminals 21 of the second connection structure 2 with the first-pole wire of the power cord, accordingly, as shown in FIG. 8, the connection terminals 21 of the second connection structure 2 are located on the left side of the module housing 3, and the connection terminals 11 of the first connection structure 1 are located on the right side of the module housing 3. 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 can also be understood as 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.

[0111] For example, the wiring end 11 of the first wiring structure 1 is in a sheet shape, 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 a cylindrical shape, 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 opposite to 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).

[0112] The above arrangement is such that the wiring end 11 of the first wiring structure 1 does not interfere with the connection of the wiring end 21 of the second wiring structure 2 and the first pole wire of the power cord. For example, when using a tool to crimp the first pole wire of the power cord in the wiring end 21 of the second wiring structure 2, the wiring end 11 of the first wiring structure 1 is not easy to interfere with the operation of the crimping tool.

[0113] Then, in the wiring, because the wiring end 11 of the first wiring structure 1 and the wiring end 21 of the second wiring structure 2 are far apart in the direction perpendicular to the plug holder 200, the wiring end 11 of the first wiring structure 1 is not easy to interfere with the wiring operation of the wiring end 21 of the second wiring structure 2 and the first pole wire of the power cord, and the wiring end 21 of the second wiring structure 2 is not easy to interfere with the wiring operation of the wiring end 11 of the first wiring structure 1 and the wiring end 3011 of the first pole plug 301. Thus, the wiring efficiency is improved.

[0114] Reference Figure 4 As shown, since the wiring end 11 of the first wiring structure 1 is lower than the wiring end 21 of the second wiring structure 2, and the wiring end 11 of the first wiring structure 1 is used to connect with the wiring end 3011 of the first pole plug 301, and the wiring end 21 of the second wiring structure 2, the wiring end 3021 of the second pole plug 302 and the wiring end 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, then, reference Figure 3As shown, the terminal 3011 of the first pin 301 is lower than the terminal 3021 of the second pin 302 and also lower than the terminal 3031 of the third pin 303. This can also be understood as follows: in the direction perpendicular to the pin bracket 200 (i.e., in the thickness direction of the plug), the terminal 3011 of the first pin 301 is located between the terminal 3021 of the second pin 302 and the first surface of the pin bracket 200. Alternatively, it can be understood that the terminal 3011 of the first pin 301 is closer to the first surface of the pin bracket 200 than the terminal 3021 of the second pin 302.

[0115] Among them, the height of the terminal 3021 of the second pole pin 302 and the terminal 3031 of the third pole pin 303 relative to the pin bracket 200 can be equal.

[0116] For example, the terminal 3011 of the first pole pin 301 is convex and located at the top of the pin portion of the first pole pin 301, and the terminal 3021 of the second pole pin 302 is cylindrical, with its axial center line perpendicular to the first surface of the pin bracket 200. Then, referring to... Figure 3 As shown, the top of the terminal 3011 of the first pole pin 301 (i.e. the end facing away from the pin bracket 200) is lower than the bottom of the terminal 3021 of the second pole pin 302 (i.e. the end facing the pin bracket 200).

[0117] Based on the above, refer to Figure 3 As shown, the first pole pin 301 structurally includes a pin portion and a terminal 3011. The pin portion is fixed in the first pole socket 201, with one end extending out of the first surface of the pin holder 200 and the other end extending out of the second surface of the pin holder 200. The terminal 3011 is located at the end of the pin portion that extends out of the first surface of the pin holder 200. The terminal 3011 is in the shape of a protruding column, located at the middle of the top of the pin portion, and protrudes away from the first surface of the pin holder 200.

[0118] Continue to refer to Figure 3 As shown, the second pole pin 302 and the third pole pin 303 can structurally include a pin portion, a terminal, and a connecting portion connecting the pin portion and the terminal. Taking the second pole pin 302 as an example, the pin portion of the second pole pin 302 is fixed in the second pole socket 202, one end of the pin portion extends out of the first surface of the pin bracket 200, and the other end of the pin portion extends out of the second surface of the pin bracket 200. The connecting portion is fixed to the end of the pin portion that extends out of the first surface of the pin bracket 200, and the terminal 3021 is fixed to the connecting portion. The terminal is cylindrical, with its axial center line perpendicular to the first surface of the pin bracket 200. The cylindrical terminal is formed by rolling up a rectangular conductive sheet (such as a copper sheet).

[0119] With reference to Figure 3 As shown, the plug portion of the first pole plug 301 extends out of the top end of the first surface of the plug holder 200, the plug portion of the second pole plug 302 extends out of the top end of the first surface of the plug holder 200, and the plug portion of the third pole plug 303 extends out of the top end of the first surface of the plug holder 200, which are substantially located in the same plane, which is parallel to the first surface of the plug holder 200.

[0120] It should be noted that, with reference to Figure 4 and Figure 5 As shown, the wire end 21 of the second wire structure 2, the wire end 3021 of the second pole plug 302, and the wire end 3031 of the third pole plug 303, in the thickness direction, are all lower than the height of the module shell 3. For example, the wire end 21 of the second wire structure 2, the wire end 3021 of the second pole plug 302, and the wire end 3031 of the third pole plug 303 are all substantially at the middle position of the module shell 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.

[0121] The following describes the wire connection mode of the power cord with the wire end 21 of the second wire structure 2, the wire end 3021 of the second pole plug 302, and the wire end 3031 of the third pole plug 303.

[0122] Among them, the connection mode of the power cord with the plug can be connected through a wire column, or can be connected through a crimping mode.

[0123] As described above, the wire end 21 of the second wire structure 2, the wire end 3021 of the second pole plug 302, and the wire end 3031 of the third pole plug 303 are all in a cylindrical shape, so the wire connection mode can be crimping, for example, the power cord is inserted into the cylinder, and the cylinder is flattened using a crimping tool to fix the wire end and the power cord.

[0124] In order to facilitate the flattening of the cylindrical wire end, accordingly, with reference to Figure 5 As shown, the cylindrical wire end has an opening, the length direction of the opening is parallel to the axial center line of the cylinder, so the strength of the cylindrical wire end at the opening is weak and easy to be pressed.

[0125] With reference to Figure 5 As shown, the wire end 21 of the second wire structure 2 has an opening 211 penetrating the thickness of the cylinder wall, the wire end 3021 of the second pole plug 302 has an opening (a slit penetrating the length and thickness of the cylinder wall) 3022, and the wire end 3031 of the third pole plug 303 has an opening 3032 penetrating the thickness of the cylinder wall. Figure 5 Figure 3 ​The slit (i.e. the gap) extends through the length and thickness of the barrel wall.

[0126] The openings on the terminal ends 3021 and 3031 of the second and third pole pins 302 and 303 are both rectangular conductive tabs (e.g. copper tabs) that are rolled into a cylindrical shape. The left and right edges of the conductive tabs are butted against each other to form the slit.

[0127] In one example, the opening 211 on the terminal end 21 of the second terminal structure 2 is a groove structure that extends through the thickness of the barrel wall, but not through the length of the barrel wall. In order to facilitate wire pressing, as shown in FIG. 2B, the number of openings 211 on the barrel wall of the terminal end 21 can be two, one opening 211 extending from the top end of the terminal end 21 to the bottom end of the terminal end 21, and the other opening 211 extending from the bottom end of the terminal end 21 to the top end of the terminal end 21. In this case, the center lines of the two openings 211 can be collinear. Figure 6

[0128] In one example, continuing to refer to FIG. 2B, the opening 211 on the terminal end 21 can be closer to the protruding structure 213 on the terminal end 21. This is because the protruding structure 213 is located on the side edge of the terminal end 21, and the terminal end 21 is a weak position at both the side edge and the opening 211, and thus is more susceptible to wire pressing. In this regard, the structure features of the second terminal structure 2 will be described below. Figure 6 Continuing to refer to FIG. 2B, the center line of the opening 211 on the terminal end 21 of the second terminal structure 2 and the center line of the opening on the terminal end 3021 of the second pole pin 302 are on a straight line that is parallel to the center line of the pin holder 200. For example, a straight line that is parallel to the center line of the pin holder 200 and passes through the center of the terminal end 21 of the second terminal structure 2 also passes through the opening 211 on the terminal end 21 of the second terminal structure 2. A straight line that is parallel to the center line of the pin holder 200 and passes through the center of the terminal end 3021 of the second pole pin 302 also passes through the opening on the terminal end 3021 of the second pole pin 302.

[0129] Figure 5 Continuing to refer to FIG. 2B, the center line of the opening on the terminal end 3031 of the third pole pin 303 is on a straight line that is perpendicular to the center line of the pin holder 200. For example, a straight line that is perpendicular to the center line of the pin holder 200 and passes through the center of the terminal end 3031 of the third pole pin 303 also passes through the opening on the terminal end 3031 of the third pole pin 303.

[0130] Continuing to refer to FIG. 2B, the center line of the opening 211 on the terminal end 21 of the second terminal structure 2 and the center line of the opening on the terminal end 3021 of the second pole pin 302 are on a straight line that is parallel to the center line of the pin holder 200. For example, a straight line that is parallel to the center line of the pin holder 200 and passes through the center of the terminal end 21 of the second terminal structure 2 also passes through the opening 211 on the terminal end 21 of the second terminal structure 2. A straight line that is parallel to the center line of the pin holder 200 and passes through the center of the terminal end 3021 of the second pole pin 302 also passes through the opening on the terminal end 3021 of the second pole pin 302. Figure 5 Continuing to refer to FIG. 2B, the center line of the opening on the terminal end 3031 of the third pole pin 303 is on a straight line that is perpendicular to the center line of the pin holder 200. For example, a straight line that is perpendicular to the center line of the pin holder 200 and passes through the center of the terminal end 3031 of the third pole pin 303 also passes through the opening on the terminal end 3031 of the third pole pin 303.

[0131] ​​In one example, the openings 211 on the terminal 21 of the second wiring structure 2 and the openings on the terminal 3021 of the second pole plug 302 can be oriented in the same direction or in opposite directions. For example, referring to Figure 5 the openings 211 on the terminal 21 of the second wiring structure 2 and the openings on the terminal 3021 of the second pole plug 302 are oriented in opposite directions, with the openings 211 on the terminal 21 of the second wiring structure 2 facing forward and the openings on the terminal 3021 of the second pole plug 302 facing backward.

[0132] Based on the openings 211 on the terminal 21 of the second wiring structure 2 and the openings on the terminal 3021 of the second pole plug 302, both of which are in the front-back direction as shown in Figure 5 the openings on the terminal 3031 of the third pole plug 303 are in the left-right direction as shown in Figure 5 then, in the crimping of the three terminals with the three conductors of the power cord, the crimping of the first pole conductor of the power cord with the terminal 21 of the second wiring structure 2 and the crimping of the second pole conductor of the power cord with the terminal 3021 of the second pole plug 302 are front-back crimping and can be crimped simultaneously. The crimping of the third pole conductor of the power cord with the terminal 3031 of the third pole plug 303 is left-right crimping.

[0133] Referring to Figure 5 the overload protection module 400 is arranged on the rear side of the terminal 3031 of the third pole plug 303 and the positions thereof are adjacent, but because the crimping direction of the terminal 3031 of the third pole plug 303 with the third pole conductor of the power cord is the left-right direction, the overload protection module 400 does not substantially interfere with the connection of the third pole plug 303 with the third pole conductor of the power cord.

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

[0135] In one example, the plug housing 100 generally encapsulates the plug holder 200 and the overload protection module 400 by encapsulation, and in the formation of the plug housing 100 by encapsulation, 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, accordingly, referring to Figures 2 to 5As shown, the plug holder 200 has a power cord holder 204 at the first position described above, where the first position is the intersection of the center line of the plug holder 200 and the edge of the plug holder 200, and is away from the third pole jack 203 on the plug holder 200.

[0136] The power cord holder 204 is used to support the power cord to limit the extension into the plug housing 100.

[0137] Referring to Figure 3 As shown, the power cord holder 204 includes a horizontal part and a vertical part connected vertically, where the horizontal part is fixed at the first position of the plug holder 200, and the vertical part is connected vertically with the horizontal part and extends upward compared to the first surface of the plug holder 200.

[0138] Continuing to refer to Figure 3 As shown, the vertical part of the power cord holder 204 has a power cord hole 2041, and then the power cord extending 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.

[0139] In an example, the power cord includes an insulating layer wrapped outside and three conductive wires, i.e. a first pole wire, a second pole wire and a third pole wire, inside the insulating layer, and the insulating layer at the end of the power cord has been stripped to expose the three conductive wires, in which case the three conductive wires are not easy to pass into the power cord hole 2041 at the same time. For this purpose, referring to Figure 3 As shown, the top end of the vertical part of the power cord holder 204 has an opening 2042, the opening 2042 of the power cord holder 204 communicates with the power cord hole 2041, and the size of the opening 2042 of the power cord holder 204 is equivalent to the outer diameter of the power cord, so that the power cord can be clamped into the opening 2042 of the power cord holder 204 and then clamped into the power cord hole 2041, so that the end of the power cord does not need to be passed into the power cord hole 2041, and the threading operation is facilitated.

[0140] Further, referring to Figure 5 As shown, the opening 2042 of the power cord holder 204 is trumpet-shaped at the top end part away from the first surface of the plug holder 200, and has a larger size, which is more easy to make the power cord pass through the opening and clamped into the power cord hole 2041, further facilitating the threading operation.

[0141] The above is the layout of the overload protection module 400 on the first surface of the plug holder 200, and the features of the overload protection module 400 are introduced below.

[0142] As Figures 7 to 10The 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.

[0143] 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.

[0144] 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.

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

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

[0147] Continue to refer to Figure 7 As shown, the square hole on the top of the bottom shell 31 has a guide structure at the top end face, and the cylinder on the bottom of the top cover 32 has a spherical outer surface at its end. Therefore, under the action of the spherical surface and the guide structure, the cylinder at the bottom of the top cover 32 can be more easily inserted into the square hole on the top of the bottom shell 31, thereby improving the assembly efficiency of the overload protection module.

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

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

[0150] As described above, the overload protection module further comprises two wiring structures, which are a first wiring structure 1 and a second wiring structure 2 respectively. Figure 7 Referring to Figure 8 , 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 extends out of the module shell 3.

[0151] Wherein, the part of the first wiring structure 1 located outside the module shell 3 comprises a wiring end for connecting with the wiring end 3011 of the first pole plug 301, and the part of the second wiring structure 2 located outside the module shell 3 comprises a wiring end for connecting with the first pole wire of the power line.

[0152] Wherein, the part of the first wiring structure 1 located inside the module shell 3 comprises a connecting piece, and the part of the second wiring structure 2 located inside the module shell 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.

[0153] 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 shell 3, referring to Figure 7 , the side wall of the bottom shell 31 adjacent to the first pole plug 301 is called 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, and the clamping mode will be introduced later in the characteristics of the two wiring structures.

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

[0155] The characteristics of the first wiring structure 1, referring to Figure 7 , include a wiring end 11, a connecting piece 12 and a transition piece 13, wherein the wiring end 11, the connecting piece 12 and the transition piece 13 are all in the shape of a piece, 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 shape of a convex column) of the first pole plug 301.

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

[0157] As shown in Figure 7 and referring to 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 latch bracket 200, the terminal 11 of the first wiring structure 1 is located outside the bottom shell 31 and is parallel to the first surface of the latch bracket 200.

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

[0159] Continuing to refer to Figure 7 and Figure 8 , the transition piece 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 groove 3111, the opening of the first clamping groove 3111 is at the top end of the bottom shell 31, and the first clamping groove 3111 penetrates the thickness of the first side wall 311.

[0160] In order to facilitate the clamping of the transition piece 13 of the first wiring structure 1 into the first clamping groove 3111 of the first side wall 311, and accordingly, referring to Figure 7 , the opening of the first clamping groove 3111 is in the shape of a horn. Then, the slot width of the first clamping groove 3111 at the opening is larger, so that the transition piece 13 is more easily clamped into the first clamping groove 3111.

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

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

[0163] So, continuing to refer to Figure 6 illustrated, the second wiring structure 2 can be formed by a straight conductive sheet, through a once right-angle bending and a once rolling. Referring to Figure 6 illustrated, the left end portion of the conductive sheet (such as copper sheet) is bent ninety degrees forward at the straight line L1 (i.e. is bent ninety degrees counterclockwise around the straight line L1), and forms the connecting sheet 22 of the second wiring structure 2, which is used to connect with the deformation sheet 4. Continuing to refer to Figure 6 illustrated, the right end portion of the conductive sheet is rolled forward at the straight line L2 (i.e. is rolled counterclockwise around the straight line L2), and the right end protruding structure 213 is inserted into (i.e. is extended into) the clamping hole 212 on the conductive sheet, so that the rolled cylindrical structure will not rebound. Among them, referring to Figure 6 illustrated, the clamping hole 212 is located at the intersection of the transition sheet 23 and the wiring end 21.

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

[0165] As Figure 7 and referring to Figure 8 and Figure 5 illustrated, after the second wiring structure 2 is installed in the bottom shell 31, and the bottom shell 31 is installed on the first surface of the bolt 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 bolt bracket 200.

[0166] Continuing to refer to Figure 7 and Figure 8 illustrated, 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.

[0167] Continuing to refer to Figure 7 and Figure 8 illustrated, the transition sheet 23 of the second wiring structure 2 is clamped with the first side wall 311, and then, correspondingly, the first side wall 311 has a second clamping groove 3112, 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.

[0168] 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, correspondingly, referring to Figure 7As shown, the notch shape of the second clamping groove 3112 is trumpet-shaped. Then, the groove width of the second clamping groove 3112 at the notch is larger, so that the transition piece 23 is more easily entered into the second clamping groove 3112.

[0169] Reference Figure 9 As shown, after the upper cover 32 is mounted on the bottom shell 31, the upper cover 32 can be pressed against the top end of the transition piece 13 of the first wiring structure 1 and the top end of the transition piece 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.

[0170] For example, reference Figure 7 As shown, 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 adapted to the notch shape of the first clamping groove 3111, and the second protruding structure 321 is adapted to the notch shape of the second clamping groove 3112, reference Figure 9 As shown, after the upper cover 32 is mounted on the bottom shell 31, the first protruding structure 321 is clamped at the notch of the first clamping groove 3111 and pressed against the top end of the first wiring structure 1, and the second protruding structure 322 is clamped at the notch of the second clamping groove 3112 and pressed against the top end of the second wiring structure 2.

[0171] As described above, the notch shape of the first clamping groove 3111 is trumpet-shaped, and the notch shape of the second clamping groove 3112 is trumpet-shaped, so that, reference 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 order to realize that the outer surface of the first protruding structure 321 is fitted with the inner surface of the notch of the first clamping groove 3111, and the outer surface of the second protruding structure 322 is fitted with the inner surface of the notch of the second clamping groove 3112.

[0172] In one example, reference Figure 6 As shown, the axial center line of the wiring end 21 is located on the first side of the transition piece 23, and the connecting piece 22 is located on the second side of the transition piece 23, wherein the first side and the second side of the transition piece 23 are two sides opposite in position along the thickness direction of the transition piece 23. Reference Figure 5 As shown, the wiring end 21 and the connecting piece 22 of the second wiring structure 2 are arranged, which is beneficial to enlarge the spacing 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.

[0173] 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, reference Figure 5As shown, the shape of the connecting terminal 11 of the first connecting structure 1 is sheet-shaped, and has a connecting hole thereon, and the shape of the connecting terminal 3011 of the first-pole plug 301 is columnar, so that the connecting terminal 3011 of the first-pole plug 301 is inserted into the connecting terminal 11 of the first connecting structure 1, and then is riveted or welded to ensure the stable connection therebetween.

[0174] In one example, as described above, the first connecting structure 1 and the second connecting structure 2 can be electrically connected or disconnected, and for this purpose, reference is continued to Figure 7 As shown, the overload protection module includes the deformation sheet 4, and the portions of the first connecting structure 1 and the second connecting structure 2 located in the bottom shell 31 are connected through the deformation sheet 4, that is, the connecting sheet 12 of the first connecting structure 1 and the connecting sheet 22 of the second connecting structure 2 are electrically connected or disconnected through the deformation sheet 4.

[0175] The features of the deformation sheet 4 will be described below.

[0176] As shown in Figure 11 As shown, the deformation sheet 4 is a structural schematic view, and reference is made to Figure 11 As shown, the deformation sheet 4 includes two connecting sheets, one of which is connected with the first connecting structure 1, and the other of which is connected with the second connecting structure 2, and the connecting sheet to be connected with the first connecting structure 1 is referred to as the first connecting sheet 41, and the connecting sheet to be connected with the second connecting structure 2 is referred to as the second connecting sheet 42. Then, reference is made 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 connecting structure 1, and the second connecting sheet 42 of the deformation sheet 4 is connected with the connecting sheet 22 of the second connecting structure 2.

[0177] Reference is continued to Figure 11 As shown, the first connecting sheet 41 and the second connecting sheet 42 are connected through the third connecting sheet 43.

[0178] In order to realize the connection and disconnection between the first connecting structure 1 and the second connecting structure 2, correspondingly, the connection between the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first connecting structure 1 and the connection between the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 22 of the second connecting 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 connecting structure 1 is fixed connection, and the connection between the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 22 of the second connecting structure 2 is movable connection.

[0179] Then, reference is made to Figure 8 As shown, the second connecting sheet 42 of the deformation sheet 4 and the connecting sheet 21 of the second connecting structure 2 have a movable contact and a stationary contact on the surfaces facing each other, respectively.

[0180] Wherein, the deformation sheet 4 realizes the separation and contact of the movable contact and the fixed contact through high-temperature deformation and low-temperature reset.

[0181] 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 popped open relative to the connecting sheet 22 of the second wiring structure 2, the movable contact is popped open relative to the fixed 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 fixed 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.

[0182] Because 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 fixed connection, as shown in Figure 7 , 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 8 , and as shown in Figure 7 , after the first connecting sheet 41 of the deformation sheet 4 is fixed with the connecting sheet 12 of the first wiring structure 1, they are inserted into the third clamping groove 313 of the bottom shell 31. Wherein, the first side wall 311 and the second side wall 312 of the bottom shell 31 are opposite to each other.

[0183] As shown in Figure 7 and Figure 8 , the slot shape of the third clamping groove 313 is trumpet-shaped, so as to realize the quick insertion of the fixed deformation sheet 4 and the first wiring structure 1 into the first clamping groove 3112, and improve the assembly efficiency.

[0184] Because 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 movable connection, the second connecting sheet 42 of the deformation sheet 4 is equivalent to a movable contact sheet, the connecting sheet 22 of the second wiring structure 2 is equivalent to a fixed contact sheet, and the second connecting sheet 42 of the deformation sheet 4 will be popped open and reset relative to the connecting sheet 22 of the second wiring structure 2, then, in the process of the second connecting sheet 42 of the deformation sheet 4 being popped open and reset, the second wiring structure 2 will be pushed to move along the direction perpendicular to the first side wall 311.

[0185] Therefore, continuing to refer to Figure 7As shown, the second wiring structure 2 has a clamping groove 231, for example, the transition sheet 23 of the second wiring structure 2 has the clamping groove 231, the opening of the clamping groove 231 of the second wiring structure 2 is opposite to the opening of the second clamping groove 3112 on the first side wall 311, then the clamping groove 231 of the second wiring structure 2 is clamped into the second clamping groove 3112 on the first side wall 311, and the clamping groove 231 of the second wiring structure 2 is clamped on the first side wall 311, and the second clamping groove 3112 is clamped on the second wiring structure 2. Then, during the elastic expansion and reset of the second connecting sheet 42 of the deformation sheet 4, the second wiring structure 2 cannot move along the direction perpendicular to the first side wall 311 under the limiting of the clamping groove 231 and the second clamping groove 3112.

[0186] With reference to the foregoing Figure 7 As shown, the opening of the clamping groove 231 on the second wiring structure 2 is in a trumpet shape, and the opening of the second clamping groove 3112 is in a trumpet shape, so as to realize the quick plug-in of the clamping groove 231 of the second wiring structure 2 and the first clamping groove 3112 and improve the assembly efficiency.

[0187] For example, 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.

[0188] 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 that of the second metal sheet, and the first metal sheet and the second metal sheet are fixed together to form the deformation sheet 4.

[0189] In this way, when the temperature inside the overload protection module is relatively high, the thermal expansion coefficient of the first metal sheet is greater than that of the second metal sheet, so the deformation amount of the first metal sheet is greater than that 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.

[0190] With reference to the foregoing Figure 8 As shown, the connecting sheet 12 of the first wiring structure 1 is parallel to the inner surface of the first side wall 311, and the connecting sheet 22 of the second wiring structure 2 is parallel to the inner surface of the first side wall 311. Then, after the deformation sheet 4 is installed in 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.

[0191] With reference to the foregoing Figure 7 and Figure 8As shown, the first connecting piece 41 of the deformation piece 4 is fixedly connected with the connecting piece 12 of the first wiring structure 1 and clamped in the third clamping slot 313 of the bottom shell 31. Therefore, when the deformation piece 4 deforms, the second connecting piece 42 of the deformation piece 4 swings (also referred to as pops out) about the first connecting piece 41 in a direction away from the connecting piece 22 of the second wiring structure 2, so that the movable contact on the second connecting piece 42 of the deformation piece 4 is separated from the stationary contact on the connecting piece 22 of the second wiring structure 2. Once the two are separated, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is disconnected.

[0192] When the deformation piece 4 resets, the second connecting piece 42 of the deformation piece 4 swings about the first connecting piece 41 in a direction close to the connecting piece 22 of the second wiring structure 2, so that the movable contact on the second connecting piece 42 of the deformation piece 4 is in contact with the stationary contact on the connecting piece 22 of the second wiring structure 2. Once the two are in contact, the electrical connection between the first wiring structure 1 and the second wiring structure 2 is connected.

[0193] In an example, in order to make the second connecting piece 42 of the deformation piece 4 swing about the first connecting piece 41 in a direction away from the connecting piece 22 of the second wiring structure 2, the second connecting piece 42 of the deformation piece 4 is provided with a protruding structure 44, as shown in Figure 10 and as shown in Figure 8 As shown, after the deformation piece 4 is loaded into the bottom shell 31, the deformation piece 4 (such as the bulging structure 43 of the deformation piece 4) has a spacing H with the second side wall 312, which is used for the deformation of the deformation piece 4, and the second connecting piece 42 of the deformation piece 4 swings about the first connecting piece 41 in a direction away from the connecting piece 22 of the second wiring structure 2.

[0194] In an example, because the thickness of the deformation piece 4 is relatively thin (such as less than 0.2 mm), the rigidity of the deformation piece 4 is relatively small, and the second connecting piece 42 of the deformation piece 4 is easily separated from the connecting piece 22 of the second wiring structure 2 due to a slight change in temperature. Therefore, as shown in Figure 10 and Figure 11 As shown, the third connecting piece 43 between the first connecting piece 41 and the second connecting piece 42 of the deformation piece 4 has a bulging structure 431 bulging in a direction away from the first side wall 311, i.e., close to the second side wall 312. The bulging structure 431 is pot-shaped or bowl-shaped and bulges to one side of the deformation piece 4. Therefore, the deformation piece 4 is also referred to as a pot piece.

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

[0196] In an example, in order to further improve the overall rigidity of the deformation piece 4, the third connecting piece 43 of the deformation piece 4 is provided with a protruding structure 45, as shown in Figure 11As shown, the part between the edge of the third connecting sheet 43 and the bulge structure 431 is sheet-shaped, and the plane where the sheet-shaped part is located is not coplanar with the plane where the first connecting sheet 41 is located, so that the first connecting sheet 41 and the sheet-shaped part of the third connecting sheet 43 are connected by bending. This kind of bending connection can improve the rigidity of the deformation sheet 4.

[0197] Similarly, with continuous reference to Figure 11 As shown, the plane where the sheet-shaped part 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 and the sheet-shaped part of the third connecting sheet 43 are connected by bending, which improves the rigidity of the deformation sheet 4.

[0198] 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 swings back and forth at high temperature with the first connecting sheet 41 as the fulcrum, the plane where the first connecting sheet 41 is located and the plane where the second connecting sheet 42 is located are coplanar.

[0199] In this way, when the temperature changes, the first metal sheet and the second metal sheet will both deform, and the deformation of the first metal sheet is greater than that of the second metal sheet. However, because the rigidity of the deformation sheet 4 is relatively large, the deformation force of the first metal sheet will not cause the second connecting sheet 42 to pop open. When the temperature exceeds a set threshold value (such as the first temperature threshold value), the deformation force of the first metal sheet will further increase, and the deformation force of the first metal sheet will increase to overcome the rigidity of the entire deformation sheet 4, causing the second connecting sheet 42 to bend towards the second side and pop open relative to the connecting sheet 22 of the second wiring structure 2, so that the movable contact on the first side of the second connecting sheet 42 is separated from the stationary contact on the connecting sheet 22 of the second wiring structure 2.

[0200] It should be pointed out that the deformation sheet 4 can be a bimetallic sheet structure, or a metal sheet formed of a memory alloy material.

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

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

[0203] As shown in Figure 12 Fig. 4 is a structural schematic diagram of the overload protection module, and Figure 12 As shown, the overload protection module also includes a reset mechanism, such as Figure 13 Fig. 5 is a schematic diagram of the reset mechanism, and Figure 13As shown, the reset mechanism comprises a push rod 5 and a spring 6, wherein the push rod 5 can also be referred to as a reset rod or a reset push rod, etc., and the spring 6 is shown as an example of a spring.

[0204] Referring to Figure 12 As shown, the bottom of the push rod 5 extends into the bottom shell 31 of the module housing 3, and the top end of the push rod 5 serves as the button 401 of the overload protection module, so referring to Figure 5 As shown, the top end of the push rod 5 penetrates the upper cover 32 of the module housing 3, referring to Figure 1 As shown, the top end of the push rod 5 also penetrates the plug housing 100 and is exposed at the top end of the plug housing 100, for example, the top end of the push rod 5 is flush with the outer surface of the plug housing 100, or the top end of the push rod 5 protrudes from the outer surface of the plug housing 100 for user pressing operation. While the spring 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31.

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

[0206] As Figure 14 shown, it is a structural schematic diagram of the push rod 5, as Figure 15 and Figure 16 shown, it is a schematic diagram of the push rod 5 before and after being loaded into the bottom shell 31.

[0207] Referring to Figure 14 As shown, the bottom of the push rod 5 has a spacer 523, when the button 401 is in a pressed state and the deformation sheet 4 is in a reset state, referring to Figure 12 As shown, the spacer 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 spacer 523 is located directly below the moving contact, so that the stationary 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 spacer 523 is in contact with the stationary contact and clamped between the moving contact and the stationary contact, achieving electrical isolation between the moving contact and the stationary contact.

[0208] For example, the current passing through the circuit in which the overload protection module is located is large, a large amount of heat is generated, the temperature inside the overload protection module is higher than the preset temperature threshold, the deformation sheet 4 is deformed, that is, the second connecting sheet 42 of the deformation sheet 4 is bent and deformed with the first connecting sheet 41 as the fulcrum, the moving contact on the deformation sheet 4 is pushed away relative to the stationary contact on the second wiring structure 2, at this time, the push rod 5 moves upward under the action of the elastic member 6, and moves to the position where the partition 523 of the push rod 5 is opposite to and in contact with the stationary contact. After the temperature inside the overload protection module cools down, the deformation sheet 4 resets, but at this time, the partition 523 of the push rod 5 is isolated between the moving contact and the stationary contact, so the user needs to press the button 401 to make the push rod 5 move downward, and move to the position where the partition 523 of the push rod 5 is below the moving contact and no longer between the moving contact and the stationary contact, at this time, the moving contact and the stationary contact restore the contact state, and the overload protection module restores the on state.

[0209] As can be seen, under normal circumstances, that is, when the temperature inside the overload protection module does not exceed the temperature threshold that causes power-off, the reset mechanism combines the moving contact and the stationary contact inside the overload protection module, and after the temperature inside the overload protection module returns to normal, the moving contact and the stationary contact are not automatically combined, but can be combined only after the technician presses 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.

[0210] Since the button used 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 sheet 42 of the deformation sheet 4 and the connecting sheet 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 523 is located at the bottom of the push rod 5 and extends away from the axial center line of the push rod 5.

[0211] For example, as shown in Figure 14 , the side wall outer surface of the push rod 5 has a first side rib 521, and the partition 523 is located at the bottom of the first side rib 521 and extends away from the axial center line of the push rod 5. Among them, 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 523 is located at the bottom.

[0212] Among them, the first side rib 521 is used to extend the partition 523 away from the axial center line of the push rod 5, and is used to be clamped in the bottom shell 31.

[0213] For example, as shown in Figure 15 The bottom shell 31 has a channel 314 therein and at a position close to the first side wall 311, which is used to restrict the elastic member 6 therein and prevent the elastic member 6 from moving laterally during the telescopic 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 spacer 523 is located outside the channel 314.

[0214] As shown in Figure 15 In order to quickly insert the first side rib 521 into the first channel opening 3141, the bottom end of the first side rib 521 has a guide structure accordingly.

[0215] Continuing to refer to Figure 14 The side portion of the push rod 5 also has a second side rib 522, the length of which extends along the axial center line of the push rod 5, for example, the bottom end of the second side rib 522 protrudes from the bottom end of the push rod 5.

[0216] The second side rib 522 is mainly used to be clamped in the bottom shell 31.

[0217] For example, as shown in Figure 15 The channel wall of the channel 314 has a second channel opening 3142 extending 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, as shown in Figure 15 The second side rib 522 can be clamped into the second channel opening 3142.

[0218] As shown in Figure 15 In order to quickly insert the second side rib 522 into the second channel opening 3142, the bottom end of the second side rib 522 has a guide structure accordingly.

[0219] Since 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, accordingly, as shown in Figure 15As shown, the first side rib 521 and the second side rib 522 are arranged in a front-rear direction in a front-rear manner, for example, the first side rib 521 is in front and the second side rib 522 is in rear in the front-rear direction, compared with the left-right arrangement 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.

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

[0221] Based on the first rod portion 51 and the second rod portion 52 are arranged in a direction perpendicular to the first side wall 311, and the partition 523 extends in a direction parallel to the first side wall 311, so 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.

[0222] Based on the second rod portion 52 is at the bottom of the first rod portion 51, the button 401 is at the top end of the push rod 5, the partition 523 is at the bottom of the push rod 5, and the elastic member 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31, so 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 away from the axial center line of the second rod portion 52, and the elastic member 6 is compressed between the bottom of the second rod portion 52 and the bottom of the bottom shell 31.

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

[0224] Reference is made to Figure 15As shown, the second rod portion 52 extends into the channel 314, which is conducive to quickly loading the push rod 5 into the bottom shell 31, and conducive to realizing automatic assembly. This is because the cylindrical second rod portion 52 and the cylindrical inner surface of the channel 314 can realize circumferential positioning, 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 spacer 523 can be clamped into the fourth clamping groove 319.

[0225] Reference is made to Figure 8 As shown, the channel 314 is between the deformation sheet 4 and the first side wall 311, and a space with a width of H needs to be reserved between the deformation sheet 4 and the second side wall 312, so that the second connecting sheet 42 of the deformation sheet 4 can be bent and deformed towards the second side wall 312. The first rod portion 51 of the push rod 5 is located at a middle position between the first side wall 311 and the second side wall 312. The bottom shell 31 is limited between the first pole hole 201 and the second pole hole 202. Therefore, reference is made to Figure 15 As shown, the first rod portion 51 has a first tangent plane 511 on a side opposite to the second rod portion 52, the first tangent plane 511 is parallel to the first side wall 311, and extends from the bottom end of the first rod portion 51 to the top end of the first rod portion 51, but does not extend to the top end of the first rod portion 51 (because the top end of the first rod portion 51 also needs to serve as the button 401).

[0226] 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 penetrates the height of the channel 314.

[0227] Then, reference is made 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, the sum of the height of the first tangent plane 511 and the height of the second tangent plane 3143 in the thickness direction is greater than the height of the third connecting sheet 43 of the deformation sheet 4, so that the top end of the third connecting sheet 43 of the deformation sheet 4 does not contact the tangent plane of the first rod portion 51 perpendicular to the first tangent plane 511, so as to prevent the tangent plane of the first rod portion 51 perpendicular to the first tangent plane 511 from interfering with the bending deformation of the second connecting sheet 42 of the deformation sheet 4.

[0228] Because the third connecting sheet 43 of the deformation sheet 4 is located at the first tangent plane 511 and the second tangent plane 3143, and the third connecting sheet 43 has a planar area, the first tangent plane 511 is coplanar with the second tangent plane 3143 on the same plane.

[0229] Continuing to refer to Figure 12As shown, after the deformable piece 4 and the push rod 5 are installed into the bottom shell 31, the top ends of the first connecting piece 41 of the deformable piece 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 ends of the second connecting piece 42 of the deformable piece 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 deformable piece 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. Under this height relationship, refer to... Figure 9 As shown, the shape of the top cover 32 is low at both ends and high in the middle.

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

[0231] To facilitate the user pressing the top of push rod 5, refer to the corresponding... Figure 1 As 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] Further, as Figure 15 and shown in Figure 16 , the bottom of the bottom shell 31 has a fourth clamping slot 319 for limiting the shake of the spacer 523, in the process of the spacer 523 moving down, clamping into the fourth clamping slot 319, and being limited by the fourth clamping slot 319 to shake.

[0236] Continuing to refer to 15, the slot shape of the fourth clamping slot 319 is trumpet-shaped, so that in the process of the button 401 (i.e. the top end of the push rod 5) being pressed down, the spacer 523 can be smoothly clamped into the fourth clamping slot 319, and the button 401 is not prone to jamming.

[0237] Because the elastic member 6 is compressed between the second rod portion 52 of the push rod 5 and the bottom of the bottom shell 31, in assembly, if the elastic member 6 is first assembled, the elastic member 6 will be pushed away from the push rod 5, which will bring certain difficulty to the assembly and is not easy to realize automatic assembly. Accordingly, the elastic member 6 can be assembled into the bottom shell 31 after the upper cover 32 of the bottom shell 31 and the bottom shell 31 are completed, and accordingly, as shown in Figure 17 , the bottom of the bottom shell 31 has a mounting port 315 at the position corresponding to the channel 314. After the upper cover 31 and the bottom shell 31 are completed, the overcurrent protection module is turned over, the elastic member 6 is assembled from the mounting port 315 at the bottom of the bottom shell 31 into the channel 314 inside the bottom shell 31, and then the plugging plug 7 is used to plug the mounting port 315. At this time, the elastic member 6 is compressed between the push rod 5 and the plugging plug 7.

[0238] Because the bottom of the bottom shell 31 is fixed in the plug shell 100, even if the plugging plug 7 has a weak interference effect with the mounting port 315, the elastic member 6 will not fall off from the mounting port 315 at the bottom of the bottom shell 31.

[0239] In an example, in order to enable the plugging plug 7 to be interference-fitted into the mounting port 315, the plugging plug 7 can be compressed so as to be interference-fitted into the mounting port 315. For example, the plugging 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 port 315.

[0240] Further referring to Figure 18 , the inner end face of the plugging plug 7 facing the channel 314 has a groove 71, and the slot of the groove 71 faces the elastic member 6, and the elastic member 6 abuts against the end face where the slot of the groove 71 is located. The groove 71 can enable the plugging plug 7 to shrink when being interference-fitted into the mounting port 315.

[0241] Continuing to refer to Figure 17 and Figure 18 , the outer surface of the bottom of the bottom shell 31 is provided with an annular rib 316 along the mounting port 315, and the annular rib 316 is used to lengthen the axial length of the mounting port 315.

[0242] In order for the sealing plug 7 to be able to fit into the annular space of the annular rib 316, refer to Figure 17 As shown, the annular rib 316 has multiple openings 3161 penetrating the thickness and height of the annular rib 316. These openings 3161 are used to reduce the stiffness of the annular rib 316, and these openings 3161 can be evenly arranged along the annular direction. Then, when the sealing plug 7 is inserted, the annular rib 316 is expanded radially, thereby inserting the sealing plug 7 into the mounting port 315 and the annular rib 316.

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

[0244] In one example, because the elastic element, under compression, abuts against the sealing plug 7, the sealing plug 7 may detach from the mounting opening 315 and the annular rib 316 under the action of the elastic element. Therefore, to prevent the sealing plug 7 from detaching from the annular rib 316 and the opening, accordingly, such as... Figure 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.

[0245] 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.

[0246] 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.

[0247] In an example, in order to make the sealing plug 7 smoothly fit into the annular rib 316 and the opening, correspondingly, referring to Figure 18 as shown, the annular rib 316 has a first guide structure (i.e. the guide angle between the end surface of the annular rib 316 and the inner surface) at the opening away from the channel 314, and the sealing plug 7 has a second guide structure (i.e. the guide angle between the bottom surface of the sealing plug 7 and the side surface) at one end close to the mounting groove, then under the cooperation of the first guide structure and the second guide structure, and under the cooperation of the annular rib 316 being stretched along the radial direction, and under the contraction of the sealing plug 7, the sealing plug 7 is located in the channel formed by the inner surface of the mounting opening 315 and the inner surface of the annular rib 316 with interference.

[0248] In an example, referring to Figure 17 as shown, because the annular rib 316 protrudes relative to the outer surface of the bottom of the shell 61, in order to stably fix the overload protection module on the latch bracket 200, correspondingly, the inner surface of the latch bracket 200 has a sink 205 (which can be referred to Figure 2 as shown), the overload protection module is fixed on the latch bracket 200, and the annular rib 316 is located in the sink 205, so that the outer surface of the bottom of the overload protection module stably fits with the inner surface of the latch bracket 200.

[0249] In addition, referring to Figure 17 as shown, the outer surface of the annular rib 316 forms a cylindrical surface, and then the inner surface of the sink 205 on the first surface of the latch bracket 200 also forms a cylindrical surface.

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

[0251] The above is the structural features of the overload protection module, and the following describes the assembly process of the overload protection module based on the features of the overload protection module.

[0252] Step one, assemble the push rod 5 into the bottom shell 31.

[0253] Referring to Figure 15 and Figure 16 as shown, align the second rod portion 52 of the push rod 5 with the channel 314, 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, and 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.

[0254] Step two, the fixed deformation sheet 4 and the first wiring structure 1 are put into the bottom shell 31.

[0255] Specifically, referring to Figure 19 and Figure 20 , the first connecting sheet 41 of the deformation sheet 4 and the connecting sheet 12 of the first wiring structure 1 are fixed and then put into the third card slot 313 together, and the transition sheet 13 of the first wiring structure 1 is clamped into the first card slot 3111.

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

[0257] Step three, the second wiring structure 2 is put into the bottom shell 31.

[0258] Specifically, as shown in Figure 21 and referring to Figure 22 , the card slot 231 on the transition sheet 23 of the second wiring structure 2 is clamped into the second card 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.

[0259] Step four, as shown in Figure 22 , the upper cover 32 of the module shell 3 is installed at the top end of the bottom shell 31.

[0260] Specifically, referring to Figure 22 , 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) at 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 , 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.

[0261] Step five, the elastic member 6 is put into the bottom shell 31 from the installation port 315 at the bottom of the bottom shell 31.

[0262] Specifically, first, the overload protection module is turned over, referring to Figure 23 , 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 put into the bottom shell 31 from the installation port 315 at the bottom of the bottom shell 31.

[0263] Step six, referring to Figure 24 , the plug 7 is inserted into the installation port 315 to compress the elastic member 6 put into the installation port 315 in the bottom shell 31.

[0264] From the above, the overload protection module in the assembly, mostly involved in the card, the assembly process is relatively simple, conducive to the realization of automation assembly, improve the assembly efficiency.

[0265] It should be noted that, because the thickness of the deformation sheet 4 is quite thin, has a certain elasticity, so, also can first deformation sheet 4 and the first wiring structure 1 as a whole into the bottom shell, and then the push rod 5 is installed in the bottom shell, then, in the push rod 5, need to open the second wiring end 42 of the deformation sheet 4, so that the push rod 5 spacer 523 down to the inner surface of the bottom shell 31 contact.

[0266] After the overload protection module is completed, the overload protection module is assembled on the first surface of the latch bracket 200. Referring to Figure 2 , the first surface of the latch bracket 200 has a circular groove 205, and a plurality of fourth positioning structures 206, and referring to Figure 24 , the bottom of the overload protection module has an annular rib 316, and a plurality of third positioning structures 318, then, the annular rib 316 of the bottom of the overload protection module is installed in the groove 205, and the fourth positioning structure 206 is matched with the corresponding third positioning structure 318, referring to Figure 4 , the assembly of the overload protection module on the first surface of the latch bracket 200 is completed.

[0267] 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. Among them, the square hole has a guide structure, and the end face shape of the cylinder is spherical, so as to realize rapid assembly and improve the assembly efficiency.

[0268] After the overload protection module 400 is assembled on the first surface of the latch bracket 200, on the basis of Figure 3 , the encapsulation process is carried out to form the plug shell 100.

[0269] The shape of a plug shell 100 can refer to Figure 1 , which is a flat columnar structure, and the latch bracket 200 and the overload protection module 400 are covered therein, and the latch assembly is extended from the plug shell 100, and the button 401 of the overload protection module 400 is exposed on the top surface of the plug shell 100, for example, the button 401 is substantially flush with the top surface of the plug shell 100.

[0270] Continuing to refer to Figure 1 , the left and right sides of the plug shell 100 have a center line symmetrical section, and the two sections are used to facilitate the user to take the plug.

[0271] Another shape of the plug shell 100 is shown inFigure 25 As shown, the plug shell 100 mainly comprises two parts, one part covers the latch support, and the other part covers the overload protection module 400. The part covering the latch support 200 is referred to as a horizontal part, and the part covering the overload protection module 400 is referred to as a vertical part.

[0272] In an example, in order to adapt to the height of the plug shell 100 as shown in Figure 25 As shown in Figure 26 As shown, the sleeve 33 at the top of the module shell 3 of the overload protection module 400 is axially perpendicular to the latch support 200, the top end of the push rod 5 extends out of the sleeve 33, and the height of the sleeve 33 is relatively high, which is used to extend the height of the plug in the thickness direction.

[0273] Continuing to refer to Figure 25 As shown, the vertical part of the plug shell 100 has a bulge structure 101 on the left and right sides, 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, which is used to facilitate the user to hold the plug.

[0274] 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 extending out of the module shell 3 and the part of the second wiring structure 2 extending out of the module shell 3 on one side of the overload protection module 400 in the front-rear direction. Wherein, 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.

[0275] Continuing to refer to Figure 26 As shown, the outer surface of the bulge structure 101 has an inwardly recessed cylindrical surface, which is convenient for the user to hold.

[0276] In the embodiments of the present disclosure, 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 power consumption. 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, so that the internal space of the socket can be saved, and more plug holes can be arranged in the socket.

[0277] Moreover, the overload protection module is integrated in the idle area originally existing between the first-pole latch and the second-pole latch of the plug, so that the overload protection module is integrated in the plug without changing the shape and size of the plug.

[0278] 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. A morphing sheet, characterized by, The deformation sheet comprises a first connecting sheet (41), a second connecting sheet (42), and a third connecting sheet (43) connected between the first connecting sheet (41) and the second connecting sheet (42); The third connecting sheet (43) has a bulge structure (431) which bulges to one side of the third connecting sheet (43) in the thickness direction of the third connecting sheet (43); The deformation sheet is used to bend and deform when the temperature is higher than a first temperature threshold, and reset when the temperature is not higher than the first temperature threshold; The deformation sheet is applied in an overload protection module, the first connecting sheet (41) is used to be electrically connected with a first wiring structure (1) of the overload protection module, the second connecting sheet (42) is used to be electrically connected with a second wiring structure (2) of the overload protection module, and when the temperature is higher than the first temperature threshold, the deformation sheet bends and deforms to disconnect the electrical connection between the first wiring structure (1) and the second wiring structure (2), and when the temperature is not higher than the first temperature threshold, the deformation sheet resets to electrically connect the first wiring structure (1) and the second wiring structure (2).

2. The morphing sheet of claim 1, wherein, The deformation sheet is used to bend and deform to one side of the deformation sheet when the temperature is higher than a first temperature threshold.

3. The morphing sheet of claim 1, wherein, The first connecting sheet (41) is used to be fixedly connected with a first wiring structure (1) of the overload protection module, and a movable contact of the overload protection module is arranged on the surface of the first connecting sheet (41) on a first side; When the temperature is higher than the first temperature threshold, the second connecting sheet (42) bends and deforms to bend to the second side of the deformation sheet, so that the movable contact arranged on the second connecting sheet (42) is separated from a static contact arranged on the second wiring structure (2), wherein the first side and the second side are opposite in the thickness direction of the deformation sheet (4); When the temperature is not higher than the first temperature threshold, the second connecting sheet (42) resets, so that the movable contact arranged on the second connecting sheet (42) contacts the static contact arranged on the second wiring structure (2).

4. The morphing sheet of claim 1, wherein, The part between the edge of the third connecting sheet (43) and the bulge structure (431) is sheet-shaped, and the plane thereof is parallel to and not coplanar with the plane of the first connecting sheet (41).

5. The morphing sheet of claim 1, wherein, The part between the edge of the third connecting sheet (43) and the bulge structure (431) is sheet-shaped, and the plane thereof is parallel to and not coplanar with the plane of the second connecting sheet (42).

6. The morphing sheet of claim 1, wherein, The plane of the first connecting sheet (41) is coplanar with the plane of the second connecting sheet (42).

7. The morphing sheet of claim 1, wherein, The shape of the bulge structure (431) is spherical or bowl-shaped or pot-shaped.

8. The morphing sheet of claim 1, wherein, The deformation sheet is a bimetallic sheet comprising a first metal sheet and a second metal sheet, the thermal expansion coefficient of the first metal sheet is greater than the thermal expansion coefficient of the second metal sheet; The movable contact of the overload protection module is arranged on the surface of the first metal sheet.

9. An overload protection module, characterized by The overload protection module comprises a module shell (3), a first wiring structure (1), a second wiring structure (2) and the strain sheet (4) as claimed in any one of claims 1 to 8; The connecting sheet of the first wiring structure (1), the connecting sheet of the second wiring structure (2) and the strain sheet (4) are all located in the module shell (3); The wiring end of the first wiring structure (1) and the wiring end of the second wiring structure (2) are both located outside the module shell (3), the wiring end of the first wiring structure (1) is used for electrically connecting with the first pole plug (301), and the wiring end of the second wiring structure (2) is used for electrically connecting with the first pole wire of the power cord.

10. A plug, characterized by The plug shell (100), the plug pin support (200), the plug pin assembly and the overload protection module (400) as claimed in claim 9 are comprised; The plug pin support (200) has a first pole plug hole (201) and a second pole plug hole (202) located on both sides of a center line, the plug pin assembly comprises a first pole plug (301) and a second pole plug (302), the first pole plug (301) is fixed in the first pole plug hole (201), and the second pole plug (302) is fixed in the second pole plug hole (202) and used for electrically connecting with the second pole wire of the power cord; The plug pin support (200) and the overload protection module (400) are both located in the plug shell (100), and the overload protection module (400) is fixed on a first surface of the plug pin support (200) and located between the first pole plug hole (201) and the second pole plug hole (202).

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