Overload protection module and plug

Abstract

The utility model relates to an overload protection module and a plug, and belongs to the technical field of power supplies. The overload protection module comprises a module shell, a first wiring structure, a second wiring structure, a deformation sheet and a reset mechanism, the module shell comprises a bottom shell and an upper cover, the bottom shell is box-shaped, and each of the first wiring structure and the second wiring structure comprises a connecting piece located in the bottom shell and a wiring end located outside the bottom shell; the deformation sheet and the reset mechanism are both located in the module shell and used for electrically connecting and disconnecting the connecting sheet of the first wiring structure and the connecting sheet of the second wiring structure; the top end face of the bottom shell is provided with multiple first positioning structures, the bottom end face of the upper cover is provided with multiple second positioning structures, and the bottom shell and the upper cover are positioned through the first positioning structures and the second positioning structures. Wherein the first positioning structure is a square hole and the second positioning structure is a cylinder, or the first positioning structure is a cylinder and the second positioning structure is a square hole. According to the invention, the electricity utilization safety can be improved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202411427204.3, filed on October 12, 2024, entitled "Plug", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of power supply technology, and in particular to an overload protection module and plug. Background Technology

[0003] As people's living standards improve, their demand for electricity is increasing. As common power sources in the home, plugs and sockets are receiving more and more attention for their safety.

[0004] With the increasing variety of electrical appliances, users often unintentionally overload electrical outlets. Overloading an outlet can, in severe cases, cause a fire, which is extremely dangerous. Therefore, researchers in the industry have been dedicated to developing safer power supply devices. Utility Model Content

[0005] To address the problems of existing technologies, this disclosure provides an overload protection module and a plug. The technical solution is as follows:

[0006] In a first aspect, this disclosure provides an overload protection module, which includes a module housing, a first wiring structure, a second wiring structure, a deformation plate, and a reset mechanism.

[0007] The first wiring structure and a portion of the second wiring structure are located inside the module housing, while the other portion extends outside the module housing. The deformation plate and the reset mechanism are both located in the module housing and are used to electrically connect and disconnect the first wiring structure and the second wiring structure.

[0008] The module housing includes a bottom shell and a top cover. The top end face of the bottom shell has multiple first positioning structures, and the bottom end face of the top cover has multiple second positioning structures. The bottom shell and the top cover are positioned by the first positioning structures and the second positioning structures.

[0009] Wherein, the first positioning structure is a square hole and the second positioning structure is a cylinder, or the first positioning structure is a cylinder and the second positioning structure is a square hole.

[0010] Optionally, the deformable piece includes a first connecting piece, a second connecting piece, and a third connecting piece connected between the first connecting piece and the second connecting piece;

[0011] The first connecting piece is located at the first end of the bottom shell, the second connecting piece is located at the second end of the bottom shell, and the third connecting piece is located between the first end and the second end of the bottom shell.

[0012] The first connecting piece is lower than or flush with the top end face of the bottom shell, the second connecting piece is lower than or flush with the top end face of the bottom shell, the third connecting piece is higher than or flush with the top end face of the bottom shell, and the top end of the push rod of the reset mechanism is located above the third connecting piece.

[0013] The top cover is positioned at the location corresponding to the first connecting piece and the second connecting piece, and is lower than the position corresponding to the third connecting piece.

[0014] Optionally, the first sidewall of the bottom shell has a first slot and a second slot;

[0015] The first wiring structure is snapped into the first slot, and the second wiring structure is snapped into the second slot.

[0016] Optionally, the bottom end face of the upper cover has a first protrusion structure and a second protrusion structure;

[0017] The first protruding structure is engaged in the first slot and presses against the top of the first wiring structure, and the second protruding structure is engaged in the second slot and presses against the top of the second wiring structure.

[0018] Optionally, the opening shape of the first card slot and the opening shape of the second card slot are funnel-shaped;

[0019] The cross-sectional shapes of the first protrusion and the second protrusion are trapezoidal.

[0020] The outer surface of the first protrusion structure is in contact with the inner surface of the first card slot at the opening, and the outer surface of the second protrusion structure is in contact with the inner surface of the second card slot at the opening.

[0021] Optionally, the upper cover has a sleeve that extends through the thickness of the upper cover and in a direction away from the upper cover;

[0022] The sleeve and the bottom shell are connected, and the portion of the push rod that extends out of the top opening of the bottom shell is located in the sleeve.

[0023] Optionally, when the push rod is in the pressed state, the top end of the push rod is flush with or extends beyond the top end face of the sleeve, wherein the top end of the sleeve is the end away from the upper cover.

[0024] Optionally, the top end face of the sleeve is flush with the top outer surface of the plug housing of the plug containing the overload protection module.

[0025] Optionally, the bottom outer surface of the bottom shell has a plurality of third positioning structures, which are used to cooperate with a plurality of fourth positioning structures on the first surface of the pin bracket of the plug where the overload protection module is located, so as to position the bottom shell on the first surface of the pin bracket.

[0026] Wherein, the third positioning structure is a square hole and the fourth positioning structure is a cylinder, or the third positioning structure is a cylinder and the fourth positioning structure is a square hole.

[0027] In a second aspect, a plug is provided, including a plug housing, a pin bracket, a pin assembly, and the overload protection module described in the first aspect;

[0028] The pin bracket has a first pole socket and a second pole socket located on both sides of the center line. The pin assembly includes a first pole pin and a second pole pin. The first pole pin is fixed in the first pole socket and the second pole pin is fixed in the second pole socket.

[0029] Both the pin bracket and the overload protection module are located in the plug housing. The overload protection module is fixed to the first surface of the pin bracket and is located between the first pole socket and the second pole socket.

[0030] The overload protection module has a first wiring structure and a second wiring structure. The first wiring structure is electrically connected to the first pole pin, and the second wiring structure is used to electrically connect to the first pole wire of the power line that extends into the plug housing.

[0031] In the solution disclosed herein, during the assembly of the bottom shell and top cover of the overload protection module housing, the cylinder is inserted into the square hole, which is easier to insert than the cylinder is inserted into the round hole. Moreover, the cylinder and the square hole fit together, which can reduce the machining accuracy compared to the cylinder and the round hole fit together.

[0032] Furthermore, the plug integrates an overload protection module. When the current in the circuit containing the plug is too high, the overload protection module disconnects the circuit, thereby improving electrical safety. Also, since the overload protection module is integrated into the plug, there is no need for an overload protection module in the socket to which the plug is inserted. This saves internal space in the socket, allowing for the placement of more outlets. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a plug provided in an exemplary embodiment of this disclosure;

[0035] Figure 2 This is a schematic diagram of the structure of a pin bracket provided in an exemplary embodiment of this disclosure;

[0036] Figure 3 This is a schematic diagram of an exemplary embodiment of the present disclosure before the overload protection module is mounted on the first surface of the pin bracket;

[0037] Figure 4 This is a schematic diagram of an overload protection module and a pin assembly provided in an exemplary embodiment of the present disclosure mounted on a pin bracket;

[0038] Figure 5 This is another schematic diagram showing the overload protection module and pin assembly provided in an exemplary embodiment of the present disclosure mounted on a pin bracket;

[0039] Figure 6 This is a schematic diagram of the second wiring structure before and after its formation, provided in an exemplary embodiment of this disclosure;

[0040] Figure 7 This is a disassembled schematic diagram of the deformable sheet, the first wiring structure, and the second wiring structure provided in an exemplary embodiment of this disclosure before they are installed into the module housing;

[0041] Figure 8 This is a schematic diagram of the deformable sheet, the first wiring structure, and the second wiring structure provided in an exemplary embodiment of this disclosure after being installed in the bottom shell;

[0042] Figure 9 This is a schematic diagram of the structure of an overload protection module provided in an exemplary embodiment of this disclosure;

[0043] Figure 10 This is a cross-sectional view of the deformable sheet, the first wiring structure, and the second wiring structure provided in an exemplary embodiment of this disclosure after being installed in the bottom shell and cut along the front-back direction;

[0044] Figure 11 This is a schematic diagram of the structure of a deformable sheet provided in an exemplary embodiment of this disclosure;

[0045] Figure 12This is a cross-sectional view of the deformable piece, the first wiring structure, the second wiring structure, and the push rod after they are installed in the bottom shell, cut along the front-back direction, according to an exemplary embodiment of this disclosure.

[0046] Figure 13 This is a schematic diagram of a reset mechanism provided in an exemplary embodiment of this disclosure;

[0047] Figure 14 This is a schematic diagram of the push rod provided in an exemplary embodiment of the present disclosure;

[0048] Figure 15 This is a schematic cross-sectional view of a push rod cut along the front-back direction before it is inserted into the bottom shell, according to an exemplary embodiment of this disclosure.

[0049] Figure 16 This is a schematic cross-sectional view of a push rod provided in an exemplary embodiment of this disclosure after it has been inserted into the bottom shell and cut along the front-back direction;

[0050] Figure 17 This is a schematic diagram of the bottom structure of the bottom shell provided in an exemplary embodiment of this disclosure;

[0051] Figure 18 This is a schematic diagram of an elastic element and a sealant provided in an exemplary embodiment of the present disclosure, located in the bottom shell;

[0052] Figure 19 This is a schematic diagram of the fixed deformable sheet and the first wiring structure before they are installed into the bottom shell, according to an exemplary embodiment of this disclosure;

[0053] Figure 20 This is a schematic diagram of the fixed deformable sheet and the first wiring structure after they are installed in the bottom shell, according to an exemplary embodiment of this disclosure;

[0054] Figure 21 This is a schematic diagram of the second wiring structure provided in an exemplary embodiment of this disclosure before it is installed in the bottom housing;

[0055] Figure 22 This is a schematic diagram of the upper cover before it is assembled to the bottom shell, according to an exemplary embodiment of this disclosure;

[0056] Figure 23 This is a schematic diagram of an elastic member provided in an exemplary embodiment of the present disclosure being inserted into the bottom shell through a mounting port at the bottom of the bottom shell;

[0057] Figure 24 This is a schematic diagram of a sealing plug being inserted into an installation port according to an exemplary embodiment of this disclosure;

[0058] Figure 25 This is a schematic diagram of another plug housing provided in an exemplary embodiment of this disclosure;

[0059] Figure 26 This is a schematic diagram of another overload protection module provided in an exemplary embodiment of this disclosure.

[0060] Explanation of reference numerals in the attached figures

[0061] 100. Plug housing; 101. Bulging structure on plug housing.

[0062] 200, Plug bracket; 201, First pole socket; 202, Second pole socket; 203, Third pole socket; 204, Power cord bracket; 205, Recessed groove; 206, Fourth positioning structure.

[0063] 2041, Power cord hole; 2042, Opening on the power cord bracket.

[0064] 301. First pole pin; 302. Second pole pin; 303. Third pole pin.

[0065] 3011, Terminal of the first pole pin; 3021, Terminal of the second pole pin; 3031, Terminal of the third pole pin.

[0066] 400. Overload protection module; 401. Button.

[0067] 1. First wiring structure; 11. Wiring terminal of the first wiring structure; 12. Connecting piece of the first wiring structure; 13. Transition piece of the first wiring structure.

[0068] 2. Second wiring structure; 21. Wiring terminal of the second wiring structure; 22. Connecting piece of the second wiring structure; 23. Transition piece of the second wiring structure.

[0069] 211. An opening in the second wiring structure; 212. A bayonet in the second wiring structure; 213. A protruding structure in the second wiring structure; 231. A slot in the second wiring structure.

[0070] 3. Module housing; 31. Bottom shell; 32. Top cover; 33. Sleeve.

[0071] 311. First sidewall; 312. Second sidewall; 313. Third slot; 314. Channel; 315. Mounting port; 316. Annular rib; 317. First positioning structure; 318. Third positioning structure; 319. Fourth slot.

[0072] 3111, First slot; 3112, Second slot; 3141, First channel opening; 3142, Second channel opening; 3143, Second cutting plane; 3161, Opening on the annular rib.

[0073] 321. First protrusion structure; 322. Second protrusion structure; 323. Second positioning structure.

[0074] 4. Deformation plate; 41. First connecting plate; 42. Second connecting plate; 43. Third connecting plate; 431. Bulging structure on the deformation plate.

[0075] 5. Putting rod; 51. First part of the rod; 52. Second part of the rod.

[0076] 511. First cutting plane; 521. First side rib; 522. Second side rib; 523. Partition.

[0077] 6. Elastic components.

[0078] 7. Seal / plug; 71. Groove. Detailed Implementation

[0079] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0080] This embodiment relates to a plug, which can be a power plug, such as a plug for a power outlet, or a plug for an electrical appliance, such as a plug for a washing machine or refrigerator. The plug in this embodiment can be a plug with a power cord or a plug without a power cord. The plug in this embodiment includes two pins: a first pin and a second pin; it can also include three pins: a first pin, a second pin, and a third pin.

[0081] In a three-phase alternating current circuit, the first pin is used to connect to the live wire, hence it is also called the L pin; the second pin is used to connect to the neutral wire, hence it is also called the N pin; and the third pin is used to connect to the ground wire, hence it is also called the E pin or ground pin.

[0082] The plug described in this embodiment integrates an overload protection module, so the plug in this embodiment is also called an overload protection plug. In this embodiment, the overload protection module is integrated into the plug without changing the shape and size of the plug.

[0083] The plug in this embodiment has an overload protection module, which helps to reduce the size of the mobile socket connected to the plug. This is because the overload protection module is integrated into the plug, so there is no need to arrange the overload protection module in the mobile socket. This not only improves the safety of the plug and socket, but also reduces the size of the socket, allowing more sockets to be arranged in a limited size.

[0084] The structural features of the plug described in this embodiment will be described in detail below.

[0085] like Figure 1 The diagram shown is a schematic of the plug structure. Figure 1 The plug shown is a plug with a power cord, although the power cord is not fully shown. Figure 2 The diagram shown is a structural schematic of the plug's pin bracket. Figure 3 The diagram shown is a schematic of the overload protection module arranged on the pin bracket.

[0086] like Figures 1 to 4 As shown, the plug includes a plug housing 100, a pin bracket 200, a pin assembly, and an overload protection module 400. The pin bracket 200 is plate-shaped and has a through hole. If the plug is a two-pin plug, the pin bracket 200 has a first pin hole 201 and a second pin hole 202. The first pin hole 201 is used to assemble the first pin 301, and is therefore also called the L-pin hole. The second pin hole 202 is used to assemble the second pin 302, and is therefore also called the N-pin hole.

[0087] refer to Figure 2 As shown, the first pole socket 201 and the second pole socket 202 are arranged symmetrically about the center line of the plug bracket 200. The center line of the plug bracket 200 is a straight line parallel to the power line output direction and passing through the center of the plug bracket 200.

[0088] If the plug is a three-pin plug, the pin bracket 200 will also have a third-pole socket 203. The third-pole socket 203 is used to assemble the third-pole pin 303, and is therefore also called the E-pole socket or ground socket. (Reference) Figure 2 As shown, the third pole socket 203 is located on the center line of the pin bracket 200.

[0089] For ease of explanation, this embodiment uses the following example: Figure 3 The example shown is a three-pin plug.

[0090] refer 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 extends out of the first surface of the pin bracket 200 (referred to as the front side of the pin bracket 200), and the other part extends out of the second surface of the pin bracket 200 (referred to as the back side of the pin bracket 200). The first surface and the second surface are positioned opposite each other.

[0091] Continue to refer to Figure 3 As shown, the second pole pin 302 is fixed in the second pole socket 202, and a part of the second pole pin 302 extends out of the first surface of the pin bracket 200, and the other part extends out of the second surface of the pin bracket 200.

[0092] Continue to refer to Figure 3 As shown, the third pole pin 303 is fixed in the third pole socket 203, and a part of the third pole pin 303 extends out of the first surface of the pin bracket 200, and the other part extends out of the second surface of the pin bracket 200.

[0093] refer to Figure 3 As shown, the portions of the first pin 301, the second pin 302, and the third pin 303 that extend out of the first surface of the pin bracket 200 all have terminals, which are respectively referred to as terminal 3011 of the first pin 301, terminal 3021 of the second pin 302, and terminal 3031 of the third pin 303.

[0094] like Figures 3 to 5 As shown, the overload protection module 400 is located on the first surface of the pin bracket 200 and between the first pole socket 201 and the second pole socket 202, wherein the center line of the overload protection module 400 is collinear with the center line of the pin bracket 200 (i.e., on a straight line).

[0095] Continue to refer to Figures 3 to 5 As shown, for a three-pin plug, the overload protection module 400 is specifically located between the first pin socket 201 and the second pin socket 202, and also between the third pin socket 203 and the first position. The first position is specifically located on the center line of the pin bracket 200 and on the edge of the pin bracket 200, that is, at the intersection of the center line of the pin bracket 200 and the edge of the pin bracket 200.

[0096] like Figure 2 And refer to Figure 5 As shown, the area enclosed by the first socket 201, the second socket 202, the third socket 203, and the aforementioned first position is the free area within the plug. Therefore, by arranging an overload protection module within this free area, the overload protection module can be integrated into the plug without changing its shape and size, thus enabling the plug to have overload protection functionality.

[0097] like Figure 5 And refer to Figure 1As shown, both the plug bracket 200 and the overload protection module 400 are located within the plug housing 100. Furthermore, the portion of the first pin 301 extending from the second surface of the plug bracket 200 (which can be referred to as the pin portion) also extends out of the plug housing 100; the portion of the second pin 302 extending from the second surface of the plug bracket 200 (which can be referred to as the pin portion) also extends out of the plug housing 100; and the portion of the third pin 303 extending from the second surface of the plug bracket 200 (which can be referred to as the pin portion) also extends out of the plug housing 100. These three pins extending from the pin portions of the plug housing 100 are used to insert into the three sockets of the socket to obtain power.

[0098] Continue to refer to Figure 1 and Figure 5 As shown, the portion of the first pin 301 extending out of the first surface of the pin holder 200, the portion of the second pin 302 extending out of the first surface of the pin holder 200, and the portion of the third pin 303 extending out of the first surface of the pin holder 200 are all located in the plug housing 100.

[0099] As mentioned above, the first pin 301 is connected to the live wire, and the second pin 302 is connected to the neutral wire. The live wire is a live wire, while the neutral wire is not live and is only responsible for returning the current to the power source. Therefore, based on the need to cut off the power supply in time and for safety considerations, the overload protection module inside the plug needs to be connected to the first wire inside the plug. For this purpose, the overload protection module 400 can be electrically connected between the first pin 301 and the first wire of the power cord.

[0100] Accordingly, the overload protection module 400 includes two wiring structures. One wiring structure is used to connect to the first pole pin 301, and the other wiring structure is used to connect to the first pole wire of the power cord extending into the plug housing 100. (Reference) Figure 5 As shown, the wiring structure used to connect to the first pole pin 301 is denoted as the first wiring structure 1, and the wiring structure used to connect to the first pole wire of the power line is denoted as the second wiring structure 2.

[0101] So, continue to refer to Figure 5 As shown, the overload protection module 400 includes a module housing 3, a first wiring structure 1 having a wiring terminal 11 extending out of the module housing 3, and a portion of the first pole pin 301 extending out of the first surface of the pin bracket 200 having a wiring terminal 3011. Therefore, the wiring terminal 11 of the first wiring structure 1 is connected to the wiring terminal 3011 of the first pole pin 301.

[0102] Continue to refer to Figure 5 As shown, the second wiring structure 2 has a wiring terminal 21 extending out of the module housing 3. The wiring terminal 21 of the second wiring structure 2 is used to connect to the second pole wire of the power line.

[0103] When the first wiring structure 1 and the second wiring structure 2 are electrically connected, the first pole wire of the power supply line is connected to the first pole pin 301. When the first wiring structure 1 and the second wiring structure 2 are electrically disconnected, the first pole wire of the power supply line is disconnected from the first pole pin 301.

[0104] Therefore, the overload protection module 400 can be configured such that when the internal temperature is relatively high, such as exceeding a first temperature threshold, the first wiring structure 1 and the second wiring structure 2 are disconnected electrically; when the internal temperature is relatively low, such as falling below a second temperature threshold, the first wiring structure 1 and the second wiring structure 2 are connected electrically. Generally, the first temperature threshold is greater than the second temperature threshold.

[0105] In application, when an overload or short circuit occurs in the circuit connected to the plug, the current value and temperature in the circuit containing the first wiring structure 1 and the second wiring structure 2 inside the overload protection module are relatively high, causing the first wiring structure 1 and the second wiring structure 2 to disconnect electrically. When the circuit connected to the plug is operating normally, the current value and temperature in the circuit containing the first wiring structure 1 and the second wiring structure 2 inside the overload protection module are within the normal range, therefore, the first wiring structure 1 and the second wiring structure 2 remain electrically connected.

[0106] In one example, when the internal temperature of the overload protection module is high, the first wiring structure 1 and the second wiring structure 2 automatically disconnect. Conversely, when the temperature is low, the first wiring structure 1 and the second wiring structure 2 can automatically switch back to electrical connection. For safe operation, when the temperature is low, a reset button can be used to force the first wiring structure 1 and the second wiring structure 2 to switch back to electrical connection.

[0107] Accordingly, refer to Figure 5 As shown, the overload protection module has a button 401, also known as a reset button. (Refer to...) Figure 1 As shown, it is exposed on the top of the plug housing 100. So, 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 electrical connection state), and when the button 401 is in the released state, the first wiring structure 1 and the second wiring structure 2 are in the disconnected state (i.e., the electrical connection is disconnected).

[0108] As described above, the first wiring structure 1 of the overload protection module is used to connect with the first pole pin 301. In order to facilitate the connection between the wiring terminal 11 of the first wiring structure 1 and the wiring terminal 3011 of the first pole pin 301, the part of the first wiring structure 1 that extends out of the module housing 3 can be arranged so that the wiring terminal 11 of the first wiring structure 1 and the first pole pin 301 are located on the same side of the module housing 3.

[0109] As for the part of the second wiring structure 2 of the overload protection module that extends out of the module housing 3, namely the wiring terminal 21 of the second wiring structure 2, it can be located on the same side of the module housing 3 as the wiring terminal 11 of the first wiring structure 1, or it can be located on the opposite side of the module housing 3 as the wiring terminal 11 of the first wiring structure 1.

[0110] However, since terminal 21 of the second wiring structure 2 is used to connect to the first conductor of the power cord, and the second pin 302 is used to connect to the second conductor of the power cord, if terminal 21 of the second wiring structure 2 and the second pin 302 are located on the same side of the module housing 3, a short circuit may easily occur due to the connection between the first conductor and the second conductor.

[0111] Therefore, refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 is also located on the same side of the module housing 3 as the first pole pin 301. The module housing 3 is located between the first pole pin 301 and the second pole pin 302. Therefore, the terminal 21 of the second wiring structure 2 and the second pole pin 302 can be located on opposite sides of the module housing 3, thereby reducing the probability of the first pole wire and the second pole wire of the power line being connected.

[0112] Since the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are both located on the same side of the module housing 3 as the first pole pin 301, refer to Figure 5 As shown, the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are both on the left side of the module housing 3. Therefore, along a straight line parallel to the center line of the pin bracket 200, the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are distributed front and back on the left side of the module housing 3.

[0113] Considering that terminal 11 of the first wiring structure 1 is used to connect to the first pole pin 301, and the first pole socket 201 where the first pole pin 301 is located is an empty area inside the plug away from the power cord, terminal 21 of the second wiring structure 2 is further away from the power cord than terminal 11 of the first wiring structure 1. This can also be understood as, with reference to... Figure 5 As shown, in the front-back direction along the center line parallel to the pin bracket 200, with the third pole pin 303 in front and the power line behind, the terminal 21 of the second wiring structure 2 is in front and the terminal 11 of the first wiring structure 1 is behind.

[0114] refer to Figure 5As shown, the terminal 21 of the second wiring structure 2 is in front of the terminal 11 of the first wiring structure 1. The terminal 21 of the second wiring structure 2 and the terminal 3021 of the second pole pin 302 are located on opposite sides of the module housing 3. The positions of the terminal 3021 of the second pole pin 302 and the terminal 11 of the first wiring structure 1 are symmetrical about the module housing 3. Therefore, referring to... Figure 5 As shown, the terminals 21 of the second wiring structure 2 and 3021 of the second pole plug 302 are diagonally distributed and far apart. Therefore, the first pole conductor (i.e., the L-pole conductor) of the power line connected to terminal 21 of the second wiring structure 2 is far from the second pole conductor (i.e., the N-pole conductor) of the power line connected to terminal 3021 of the second pole plug 302, making it unlikely that a connection will occur. Therefore, if... Figure 5 As shown, the arrangement of the terminals 11 of the first wiring structure 1 and the terminals 21 of the second wiring structure 2 is beneficial to improving the application safety of the plug.

[0115] Since the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2 are located on the same side of the module housing 3 and distributed along the front and back of the module housing 3, in order to facilitate the connection of the terminal 21 of the second wiring structure 2 with the first pole wire of the power line, accordingly, refer to Figure 4 As shown, in the direction perpendicular to the plug bracket 200 (which is also the thickness direction of the plug), the terminal 11 of the first wiring structure 1 is located between the terminal 21 of the second wiring structure 2 and the first surface of the plug bracket 200. It can also be understood that the terminal 11 of the first wiring structure 1 is lower than the terminal 21 of the second wiring structure 2. Alternatively, it can be understood that the terminal 11 of the first wiring structure 1 is closer to the plug bracket 200 than the terminal 21 of the second wiring structure 2.

[0116] For example, the terminal 11 of the first wiring structure 1 is plate-shaped and its plane is parallel to the first surface of the pin bracket 200. The terminal 21 of the second wiring structure 2 is cylindrical and its axial center line is perpendicular to the first surface of the pin bracket 200. Then, the top surface of the terminal 11 of the first wiring structure 1 (i.e. the surface facing away from the first surface of the pin bracket 200) is lower than the bottom end of the second wiring structure 2 (i.e. the end facing the first surface of the pin bracket 200).

[0117] With the above arrangement, the terminal 11 of the first wiring structure 1 will not interfere with the connection between the terminal 21 of the second wiring structure 2 and the first conductor of the power cord. For example, when using a tool to crimp the first conductor of the power cord into the terminal 21 of the second wiring structure 2, the terminal 11 of the first wiring structure 1 will not easily interfere with the operation of the crimping tool.

[0118] Therefore, in the wiring process, because the terminals 11 of the first wiring structure 1 and 21 of the second wiring structure 2 are far apart in the direction perpendicular to the plug bracket 200, the terminals 11 of the first wiring structure 1 are less likely to interfere with the wiring operation between the terminals 21 of the second wiring structure 2 and the first pole conductor of the power line, and the terminals 21 of the second wiring structure 2 are also less likely to interfere with the wiring operation between the terminals 11 of the first wiring structure 1 and the terminals 3011 of the first pole plug 301. This improves wiring efficiency.

[0119] refer to Figure 4 As shown, since terminal 11 of the first wiring structure 1 is lower than terminal 21 of the second wiring structure 2, and terminal 11 of the first wiring structure 1 is used to connect to terminal 3011 of the first pole pin 301, and terminals 21, 3021, and 3031 of the second wiring structure 2, the second pole pin 302, and the third pole pin 303 are respectively used to electrically connect to the first, second, and third pole wires of the power supply line, then, referring to... Figure 3 As 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.

[0120] 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.

[0121] 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).

[0122] Based on the above, refer to Figure 3As 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.

[0123] 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).

[0124] Continue to refer to Figure 3 As shown, the pin portion of the first pin 301 extends out of the top of the first surface of the pin bracket 200, the pin portion of the second pin 302 extends out of the top of the first surface of the pin bracket 200, and the pin portion of the third pin 303 extends out of the top of the first surface of the pin bracket 200, and are located approximately in the same plane, which is parallel to the first surface of the pin bracket 200.

[0125] It should be noted that, for reference Figure 4 and Figure 5 As shown, the terminals 21 of the second wiring structure 2, 3021 of the second pole pin 302, and 3031 of the third pole pin 303, which are used to connect to the power cord, are all lower than the height of the module housing 3 in the thickness direction. For example, the terminals 21 of the second wiring structure 2, 3021 of the second pole pin 302, and 3031 of the third pole pin 303 are all approximately located at the middle of the module housing 3. This height relationship ensures that the overload protection module will not cause the plug to be too high, or even change the original plug height.

[0126] The following describes the wiring method in which the power cord is connected to terminal 21 of the second wiring structure 2, terminal 3021 of the second pole plug 302, and terminal 3031 of the third pole plug 303.

[0127] The power cord can be connected to the plug via a terminal block or by crimping.

[0128] As described above, the terminal 21 of the second wiring structure 2, the terminal 3021 of the second pole pin 302, and the terminal 3031 of the third pole pin 303 are all cylindrical. Therefore, the wiring method can be crimping. For example, the power cord is inserted into the cylinder, and a crimping tool is used to flatten the cylinder so that the terminal is fixedly connected to the power cord.

[0129] To facilitate flattening the cylindrical terminal, refer to the relevant documentation. Figure 5 As shown, the cylindrical terminals all have openings, and the length direction of the openings is parallel to the axial center line of the cylinder. Therefore, the cylindrical terminals are weaker at the openings and are easier to press against the wires.

[0130] Continue to refer to Figure 5 As shown, the terminal 21 of the second wiring structure 2 has an opening 211 that penetrates the thickness of the cylinder wall, and the terminal 3021 of the second pole pin 302 has an opening that penetrates the thickness of the cylinder wall. Figure 5 Specifically, the gap extends through the length and thickness of the cylinder wall; the terminal 3031 of the third pole pin 303 has an opening that extends through the thickness of the cylinder wall. Figure 3 Specifically, this refers to a gap that extends through the length and thickness of the cylinder wall.

[0131] The openings on the terminals 3021 of the second pole pin 302 and the openings on the terminals 3031 of the third pole pin 303 are both gaps formed by the left and right edges of a rectangular conductive sheet (such as a copper sheet) being rolled up to form a cylindrical terminal.

[0132] In one example, the opening 211 on the terminal 21 of the second wiring structure 2 does not extend through the length of the cylinder wall; instead, it is a groove structure that extends through the thickness of the cylinder wall. For ease of wire clamping, refer to... Figure 6 As shown, there can be two openings 211 on the cylinder wall of the terminal 21. One opening 211 extends from the top end of the terminal 21 to the bottom end of the terminal 21, and the other opening 211 extends from the bottom end of the terminal 21 to the top end of the terminal 21. The center lines of the two openings 211 can be collinear.

[0133] In one example, continue to refer to Figure 6 As shown, the opening 211 on the terminal 21 can be closer to the protrusion 213 on the terminal 21. This is because the protrusion 213 is located on the side edge of the terminal 21, so both the side edge and the opening 211 of the terminal 21 are weak points under stress, making it easier to press the wire. The structural features of the second wiring structure 2 will be described below.

[0134] Continue to refer to Figure 5 As shown, the center line of the opening 211 on the terminal 21 of the second wiring structure 2 and the center line of the opening on the terminal 3021 of the second pole pin 302 lie on a straight line parallel to the center line of the pin bracket 200. For example, a straight line parallel to the center line of the pin bracket 200 and passing through the center of the terminal 21 of the second wiring structure 2 also passes through the opening 211 on the terminal 21 of the second wiring structure 2. Similarly, a straight line parallel to the center line of the pin bracket 200 and passing through the center of the terminal 3021 of the second pole pin 302 also passes through the opening on the terminal 3021 of the second pole pin 302.

[0135] Continue to refer to Figure 5 As shown, the center line of the opening on the terminal 3031 of the third pole pin 303 lies on a straight line perpendicular to the center line of the pin bracket 200. For example, a straight line perpendicular to the center line of the pin bracket 200 and passing through the center of the terminal 3031 of the third pole pin 303 also passes through the opening on the terminal 3031 of the third pole pin 303.

[0136] In one example, the opening 211 on the terminal 21 of the second wiring structure 2 and the opening on the terminal 3021 of the second pole pin 302 can face the same direction or opposite directions. For example, refer to Figure 5 As shown, the opening 211 on the terminal 21 of the second wiring structure 2 and the opening on the terminal 3021 of the second pole pin 302 face opposite directions. The opening 211 on the terminal 21 of the second wiring structure 2 faces forward, and the opening on the terminal 3021 of the second pole pin 302 faces backward.

[0137] Based on the opening 211 on the terminal 21 of the second wiring structure 2 and the opening on the terminal 3021 of the second pole pin 302, both are as follows: Figure 5 In the front-back direction shown, the opening on the terminal 3031 of the third pole pin 303 is as follows: Figure 5 As shown in the left-right direction, the crimping of the three wires of the power cord with the three terminals involves two different crimping methods: the crimping of the first wire of the power cord with terminal 21 of the second wiring structure 2, and the crimping of the second wire of the power cord with terminal 3021 of the second pin 302. These are front-to-back crimpings and can be performed simultaneously. The crimping of the third wire of the power cord with terminal 3031 of the third pin 303 is a left-to-right crimping.

[0138] refer to Figure 5As shown, although the overload protection module 400 is located behind the terminal 3031 of the third pole pin 303 and the two are close to each other, the overload protection module 400 will not interfere with the connection between the third pole pin 303 and the third pole wire of the power cord because the crimping direction of the terminal 3031 of the third pole pin 303 and the third pole wire of the power cord is left and right.

[0139] So, reference Figure 5 As shown, the power cord extending into the plug housing 100 has its first, second, and third pole wires inserted into the terminal 21 of the second wiring structure 2, the terminal 321 of the second pole pin 302, and the terminal 3031 of the third pole pin 303, respectively. Then, using a wire crimping tool, the terminal 21 and the terminal 3021 are crimped together from front to back, and the terminal 3031 is crimped together from side to side.

[0140] In one example, the plug housing 100 typically encapsulates the pin bracket 200 and the overload protection module 400 using an encapsulation method. In forming the plug housing 100 using this encapsulation method, to prevent the power cord from moving left and right in the lateral direction and up and down in the thickness direction, the reference is... Figures 2 to 5 As shown, the plug bracket 200 has a power cord bracket 204 at the first position mentioned above. The first position is the intersection of the center line of the plug bracket 200 and the edge of the plug bracket 200, and is located away from the third pole socket 203 on the plug bracket 200.

[0141] The power cord bracket 204 is used to support and restrict the power cord from extending into the plug housing 100.

[0142] refer to Figure 3 As shown, the power cord bracket 204 includes a horizontal portion and a vertical portion that are vertically connected. The horizontal portion is fixed at a first position on the plug bracket 200, and the vertical portion is vertically connected to the horizontal portion and extends upward relative to the first surface of the plug bracket 200.

[0143] Continue to refer to Figure 3 As shown, the vertical portion of the power cord bracket 204 has a power cord hole 2041. The power cord that extends 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, which is for pulling during crimping.

[0144] In one example, the power cord visually comprises an outer insulating layer and three conductors within the insulating layer: a first conductor, a second conductor, and a third conductor. During wiring, the insulating layer at the ends of the power cord has been stripped, exposing the three conductors. In this case, when inserting the power cord into the power cord hole 2041, it is difficult for all three conductors to be inserted simultaneously. Therefore, refer to... Figure 3 As shown, the top of the vertical portion of the power cord bracket 204 has an opening 2042, which is connected to the power cord hole 2041. The size of the opening 2042 of the power cord bracket 204 is similar to the outer diameter of the power cord. Therefore, the power cord can be inserted into the opening 2042 of the power cord bracket 204 and then into the power cord hole 2041. This eliminates the need to insert the end of the power cord into the power cord hole 2041, making the wire threading operation convenient.

[0145] Further, refer to Figure 5 As shown, the opening 2042 of the power cord bracket 204 is flared at the top of the first surface away from the plug bracket 200. It is relatively large, which makes it easier for the power cord to be inserted into the power cord hole 2041 through the opening, further facilitating the wire threading operation.

[0146] The above describes the layout of the overload protection module 400 on the first surface of the pin bracket 200. The features of the overload protection module 400 are described below.

[0147] like Figures 7 to 10 The diagram shown is a structural schematic of the overload protection module 400. (Refer to...) Figure 7 As shown, the overload protection module housing 3 includes a bottom shell 31 and a top cover 32. The bottom shell 31 is box-shaped, specifically an open-top box structure, including a bottom wall and multiple side walls, which enclose an internal space. The top cover 32 is used to fasten to the top of the bottom shell 31.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] The third positioning structure 318 can be a square hole, and the fourth positioning structure 206 can be a cylinder, or the third positioning structure 318 can be a cylinder and the fourth positioning structure 206 can be a square hole.

[0155] As described above, the overload protection module also includes two wiring structures, namely the first wiring structure 1 and the second wiring structure 2, as follows: Figure 7 And refer to Figure 8 As shown, the first wiring structure 1 and the second wiring structure 2 are installed in the module housing 3, with one part located inside the module housing 3 and the other part extending out of the module housing 3.

[0156] The first wiring structure 1, located outside the module housing 3, includes a wiring terminal for connecting to the wiring terminal 3011 of the first pole pin 301. The second wiring structure 2, located outside the module housing 3, includes a wiring terminal for connecting to the first pole wire of the power cord.

[0157] The first wiring structure 1, located inside the module housing 3, includes a connecting piece, and the second wiring structure 2, located inside the module housing 3, also includes a connecting piece. The connecting pieces of the first wiring structure 1 and the second wiring structure 2 can be electrically connected or disconnected to enable the overload protection module to be switched on and off.

[0158] As mentioned above, the terminal 11 of the first wiring structure 1, the terminal 21 of the second wiring structure 2, and the terminal 3011 of the first pole pin 301 are located on the same side of the module housing 3, as shown in the reference. Figure 7 As shown, the side wall of the bottom shell 31 adjacent to the first pole pin 301 is referred to as the first side wall 311. Then, the terminal 11 of the first wiring structure 1 and the terminal 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 snapped onto the first side wall 311 of the bottom shell 31, and the second wiring structure 2 is also snapped onto the first side wall 311 of the bottom shell 31. The snapping method will be introduced later in the description of the features of the two wiring structures.

[0159] The features of the first wiring structure 1 and the second wiring structure 2 are described below.

[0160] The characteristics of the first wiring structure 1 are described in reference. Figure 7 As shown, it includes a terminal 11, a connecting piece 12, and a transition piece 13. The terminal 11, the connecting piece 12, and the transition piece 13 are all plate-shaped. The transition piece 13 is connected between the terminal 11 and the connecting piece 12, and the transition piece 13 is perpendicularly connected to the terminal 11 and the connecting piece 12. The terminal 11 has a wiring hole for engaging with the terminal (which is convex) of the first pole pin 301.

[0161] Based on the characteristics of the terminal 11, connecting piece 12, and transition piece 13 in the first wiring structure 1, and their relationship, the three can be integrally formed, or can be formed by bending a conductive sheet. For example, refer to... Figure 7 As shown, a conductive sheet shaped like the number "7" can be bent forward at a 90-degree angle on its horizontal portion and backward at a 90-degree angle on its vertical portion to achieve the following result: Figure 7 The first wiring structure 1 is shown.

[0162] like Figure 7 And refer to Figure 8 and Figure 5 As shown, the first wiring structure 1 is installed in the bottom shell 31. When the bottom shell 31 is installed on the first surface of the pin bracket 200, the wiring terminal 11 of the first wiring structure 1 is located outside the bottom shell 31 and is parallel to the first surface of the pin bracket 200.

[0163] Continue to refer to Figure 7 and Figure 8As shown, 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.

[0164] Continue to refer to Figure 7 and Figure 8 As shown, the transition piece 13 of the first wiring structure 1 is engaged with the first side wall 311. Accordingly, the first side wall 311 has a first slot 3111. The opening of the first slot 3111 is at the top of the bottom shell 31, and the first slot 3111 penetrates the thickness of the first side wall 311.

[0165] To facilitate the insertion of the transition piece 13 of the first wiring structure 1 into the first slot 3111 of the first sidewall 311, correspondingly, refer to Figure 7 As shown, the opening of the first slot 3111 is trumpet-shaped. Therefore, the slot width at the opening of the first slot 3111 is relatively large, making it easier for the transition piece 13 to enter the first slot 3111.

[0166] Second wiring structure 2, refer to Figure 6 As shown, it includes a cylindrical terminal 21, a sheet-shaped connecting piece 22, and a sheet-shaped transition piece 23. The transition piece 23 is connected between the terminal 21 and the connecting piece 22, and the transition piece 23 and the connecting piece 22 are perpendicularly connected. The intersection line of the transition piece 23 and the connecting piece 22 is parallel to the axial center line of the terminal 21.

[0167] Based on the characteristics of the terminal 21, connecting piece 22 and transition piece 23 of the second wiring structure 2 and the relationship between them, the three can be integrally formed, or can be formed by bending conductive pieces.

[0168] So, continue to refer to Figure 6 As shown, the second wiring structure 2 can be formed from a straight conductive sheet by a right-angle bend and a roll-up. (Reference) Figure 6 As shown, the left end of the conductive sheet (such as a copper sheet) bends forward at a 90-degree angle at straight line L1 (that is, it bends counterclockwise around straight line L1 by 90 degrees) to form the connecting piece 22 of the second wiring structure 2, which is used to connect with the deformable sheet 4. (Continue to refer to...) Figure 6 As shown, the right end of the conductive sheet is rolled forward at line L2 (that is, rolled counterclockwise around line L2) until the protruding structure 213 at the right end engages (that is, extends into) the slot 212 on the conductive sheet, preventing the rolled-up cylindrical structure from rebounding. (Refer to...) Figure 6 As shown, the bayonet 212 is located approximately at the intersection of the transition piece 23 and the terminal 21.

[0169] This second wiring structure 2, formed by a straight conductive sheet, has the advantages of simple structure, less material usage, and lower cost compared to the one formed by a T-shaped conductive sheet.

[0170] like Figure 7 And refer to Figure 8 and Figure 5 As shown, the second wiring structure 2 is installed in the bottom shell 31. After the bottom shell 31 is installed on the first surface of the pin bracket 200, the wiring terminal 21 of the second wiring structure 2 is located outside the bottom shell 31, and the axial center line of the cylindrical wiring terminal 21 is perpendicular to the first surface of the pin bracket 200.

[0171] Continue to refer to Figure 7 and Figure 8 As shown, after the second wiring structure 2 is installed in the bottom shell 31, the connecting piece 31 of the second wiring structure 2 is located inside the bottom shell 31 and is parallel to the first side wall 311 of the bottom shell 31, and the transition piece 23 of the second wiring structure 2 is perpendicular to the first side wall 311 of the bottom shell 31.

[0172] Continue to refer to Figure 7 and Figure 8 As shown, the transition piece 23 of the second wiring structure 2 is engaged with the first side wall 311. Accordingly, the first side wall 311 has a second slot 3112. The opening of the second slot 3112 is at the top of the bottom shell 31, and the second slot 3112 penetrates the thickness of the first side wall 311.

[0173] To facilitate the insertion of the transition piece 23 of the second wiring structure 2 into the second slot 3112 of the first sidewall 311, refer to... Figure 7 As shown, the opening of the second slot 3112 is trumpet-shaped. Therefore, the slot width at the opening of the second slot 3112 is relatively large, making it easier for the transition piece 23 to enter the second slot 3112.

[0174] refer to Figure 9 As shown, after the upper cover 32 is installed on the bottom shell 31, the upper cover 32 can press against the top of the transition piece 13 of the first wiring structure 1 and the top of the transition piece 23 of the second wiring structure 2 to limit the upper and lower positions of the first wiring structure 1 and the second wiring structure 2.

[0175] For example, refer to Figure 7 As shown, the bottom end of the upper cover 32 has a first protrusion structure 321 and a second protrusion structure 322. The first protrusion structure 321 is adapted to the shape of the opening of the first slot 3111, and the second protrusion structure 321 is adapted to the shape of the opening of the second slot 3112. (Refer to...) Figure 9As shown, after the top cover 32 is fastened onto the bottom shell 31, the first protrusion 321 is engaged in the groove of the first slot 3111 and presses against the top of the first wiring structure 1, and the second protrusion 322 is engaged in the groove of the second slot 3112 and presses against the top of the second wiring structure 2.

[0176] As described above, the opening of the first slot 3111 is trumpet-shaped, and the opening of the second slot 3112 is also trumpet-shaped. Therefore, referring to... Figure 7 As shown, the cross-sectional shape of the first protrusion 321 is trapezoidal, and the cross-sectional shape of the second protrusion 322 is also trapezoidal. This is to achieve that the outer surface of the first protrusion 321 fits with the inner surface of the slot of the first slot 3111, and the outer surface of the second protrusion 322 fits with the inner surface of the slot of the second slot 3112.

[0177] In one example, refer to Figure 6 As shown, the axial centerline of terminal 21 is located on the first side of transition piece 23, and connecting piece 22 is located on the second side of transition piece 23. The first and second sides of transition piece 23 are opposite sides positioned along the thickness direction of transition piece 23. (Reference) Figure 5 As shown, the arrangement of the terminal 21 and connecting piece 22 of the second wiring structure 2 is beneficial to increasing the distance between the terminal 11 of the first wiring structure 1 and the terminal 21 of the second wiring structure 2, so as to facilitate riveting or welding.

[0178] As described above, terminal 11 of the first wiring structure 1 is connected to terminal 3011 of the first pole pin 301, for reference. Figure 5 As shown, the terminal 11 of the first wiring structure 1 is plate-shaped with a wiring hole, and the terminal 3011 of the first pole pin 301 is column-shaped. The terminal 3011 of the first pole pin 301 extends into the terminal 11 of the first wiring structure 1, and can then be riveted or welded to ensure a stable connection between the two.

[0179] In one example, as described above, the first wiring structure 1 and the second wiring structure 2 can be electrically connected or disconnected. For this purpose, please refer to [reference needed]. Figure 7 As shown, the overload protection module includes a deformation plate 4. The first wiring structure 1 and the second wiring structure 2 are located inside the bottom shell 31 and are connected through the deformation plate 4. That is, the connecting piece 12 of the first wiring structure 1 and the connecting piece 22 of the second wiring structure 2 are electrically connected and disconnected through the deformation plate 4.

[0180] The characteristics of deformable piece 4 will be described below.

[0181] like Figure 11 The diagram shown is a structural schematic of the deformable piece 4. (Refer to...) Figure 11As shown, the deformable piece 4 includes two connecting pieces. One connecting piece is connected to the first wiring structure 1, and the other is connected to the second wiring structure 2. The connecting piece used to connect to the first wiring structure 1 is designated as the first connecting piece 41, and the connecting piece used to connect to the second wiring structure 2 is designated as the second connecting piece 42. Then, referring to... Figure 7 As shown, the first connecting piece 41 of the deformable piece 4 is connected to the connecting piece 12 of the first wiring structure 1, and the second connecting piece 42 of the deformable piece 4 is connected to the connecting piece 22 of the second wiring structure 2.

[0182] Among them, continue to refer to Figure 11 As shown, the first connecting piece 41 and the second connecting piece 42 are connected by a third connecting piece 43.

[0183] To enable both connection and disconnection between the first wiring structure 1 and the second wiring structure 2, correspondingly, one connection between the first connecting piece 41 of the deformable piece 4 and the connecting piece 12 of the first wiring structure 1, and the other connection between the second connecting piece 42 of the deformable piece 4 and the connecting piece 22 of the second wiring structure 2, are fixed connections, while the other is a movable connection. For example, the connection between the first connecting piece 41 of the deformable piece 4 and the connecting piece 12 of the first wiring structure 1 is a fixed connection, while the connection between the second connecting piece 42 of the deformable piece 4 and the connecting piece 22 of the second wiring structure 2 is a movable connection.

[0184] Then, you can refer to Figure 8 As shown, the second connecting piece 42 of the deformable piece 4 and the connecting piece 21 of the second wiring structure 2 have moving contacts and stationary contacts respectively on their facing surfaces.

[0185] Among them, the deformation plate 4 achieves the separation and contact of the moving contact and the stationary contact through high temperature deformation and low temperature reset.

[0186] For example, when the temperature exceeds the first temperature threshold, the deformation piece 4 deforms. After deformation, the second connecting piece 42 of the deformation piece 4 springs open relative to the connecting piece 22 of the second wiring structure 2, and the moving contact springs open relative to the stationary contact, thereby disconnecting the electrical connection between the first wiring structure 1 and the second wiring structure 2. When the temperature does not exceed the first temperature threshold, the deformation piece 4 resets. After resetting, the moving contact on the second connecting piece 42 of the deformation piece 4 contacts the stationary contact on the connecting piece 22 of the second wiring structure 2, thereby connecting the first wiring structure 1 and the second wiring structure 2.

[0187] Because the connection between the first connecting piece 41 of the deformable piece 4 and the connecting piece 12 of the first wiring structure 1 is a fixed connection, therefore, refer to Figure 7 As shown, the bottom shell 31 has a third slot 313 between the first side wall 311 and the second side wall 312, as... Figure 8And refer to Figure 7 As shown, after the first connecting piece 41 of the deformable piece 4 is fixed to the connecting piece 12 of the first wiring structure 1, they are inserted together into the third slot 313 of the bottom shell 31. The first side wall 311 and the second side wall 312 of the bottom shell 31 are positioned opposite each other.

[0188] refer to Figure 7 and Figure 8 As shown, the third slot 313 has a trumpet-shaped opening to allow the fixed deformation piece 4 and the first wiring structure 1 to be quickly inserted into the first slot 3112, thereby improving assembly efficiency.

[0189] Since the connection between the second connecting piece 42 of the deformable piece 4 and the connecting piece 22 of the second wiring structure 2 is a movable connection, the second connecting piece 42 of the deformable piece 4 is equivalent to a moving contact piece, and the connecting piece 22 of the second wiring structure 2 is equivalent to a stationary contact piece. The second connecting piece 42 of the deformable piece 4 will spring open and reset relative to the connecting piece 22 of the second wiring structure 2. Therefore, during the process of the second connecting piece 42 of the deformable piece 4 springing open and resetting, it will push the second wiring structure 2 to move along a direction perpendicular to the first side wall 311.

[0190] Therefore, continue to refer to Figure 7 As shown, the second wiring structure 2 has a slot 231. For example, the transition piece 23 of the second wiring structure 2 has a slot 231. The opening of the slot 231 of the second wiring structure 2 faces opposite to the opening of the second slot 3112 on the first sidewall 311. Therefore, the slot 231 of the second wiring structure 2 engages with the second slot 3112 on the first sidewall 311, so that the slot 231 of the second wiring structure 2 is engaged on the first sidewall 311, and the second slot 3112 is engaged on the second wiring structure 2. Thus, during the spring-opening and resetting process of the second connecting piece 42 of the deformable piece 4, under the limiting effect of the slots 231 and 3112, the second wiring structure 2 will not move in a direction perpendicular to the first sidewall 311.

[0191] Continue to refer to Figure 7 As shown, the slot 231 on the second wiring structure 2 has a flared shape, and the slot 3112 on the second wiring structure 2 has a flared shape, so as to realize the quick insertion of the slot 231 and the first slot 3112 of the second wiring structure 2 and improve the assembly efficiency.

[0192] The principle of high-temperature deformation and low-temperature reset of the deformable sheet 4 can be caused by the difference in thermal expansion coefficients on the two sides of the deformable sheet 4 along the thickness direction.

[0193] For example, the deformation sheet 4 can be a bimetallic sheet, formed by two metal materials with different coefficients of thermal expansion. For example, the deformation sheet 4 includes a first metal sheet and a second metal sheet, wherein the coefficient of thermal expansion of the first metal sheet is greater than that of the second metal sheet, and the first metal sheet and the second metal sheet are bonded and fixed together to form the deformation sheet 4.

[0194] In this way, when the temperature inside the overload protection module is high, the coefficient of thermal expansion of the first metal sheet is greater than that of the second metal sheet. Therefore, the deformation of the first metal sheet is greater than that of the second metal sheet. However, the first and second metal sheets are always fixed together, which leads to the first metal sheet with greater deformation bending towards the second metal sheet with less deformation.

[0195] refer to Figure 8 As shown, the connecting piece 12 of the first wiring structure 1 is parallel to the inner surface of the first sidewall 311, and the connecting piece 22 of the second wiring structure 2 is parallel to the inner surface of the first sidewall 311. After the deformable piece 4 is installed in the bottom shell 31, the first metal piece of the deformable piece 4 faces the first sidewall 311 of the bottom shell 31, and the second metal piece of the deformable piece 4 faces away from the first sidewall 311. The moving contact on the second connecting piece 42 of the deformable piece 4 is located on the surface of the first metal piece.

[0196] refer to Figure 7 and Figure 8 As shown, the first connecting piece 41 of the deformable piece 4 is fixedly connected to the connecting piece 12 of the first wiring structure 1 and is stuck in the third slot 313 of the bottom shell 31. Therefore, when the deformable piece 4 deforms, the second connecting piece 42 of the deformable piece 4 will swing away from the connecting piece 22 of the second wiring structure 2 (also known as springing away) with the first connecting piece 41 as the fulcrum, so that the moving contact on the second connecting piece 42 of the deformable piece 4 separates 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 broken.

[0197] When the deformable piece 4 is reset, the second connecting piece 42 of the deformable piece 4 will swing towards the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum, so that the moving contact on the second connecting piece 42 of the deformable piece 4 will contact 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 will be connected.

[0198] In one example, to make the second connecting piece 42 of the deformable piece 4 spring away from the connecting piece 22 of the second wiring structure 2, with the first connecting piece 41 as the fulcrum, accordingly, such as Figure 10 And refer to Figure 8As shown, after the deformation piece 4 is installed in the bottom shell 31, there is a gap H between the deformation piece 4 (such as the bulge structure 43 of the deformation piece 4) and the second side wall 312. This gap is used to allow the deformation piece 4 to deform. The second connecting piece 42 of the deformation piece 4 springs away from the connecting piece 22 of the second wiring structure 2 with the first connecting piece 41 as the fulcrum.

[0199] In one example, because the deformation piece 4 is relatively thin (e.g., less than 0.2 mm), its stiffness is relatively low, making it prone to separation of the second connecting piece 42 from the connecting piece 22 of the second wiring structure 2 even with slight temperature changes. Therefore, refer to... Figure 10 and Figure 11 As shown, the deformable sheet 4 has a third connecting sheet 43 between the first connecting sheet 41 and the second connecting sheet 42, and has a bulging structure 431 that bulges out in the direction away from the first side wall 311, that is, in the direction close to the second side wall 312. The bulging structure 431 is pot-shaped or bowl-shaped and bulges out to one side of the deformable sheet 4. Therefore, the deformable sheet 4 is sometimes also called a pot dome sheet.

[0200] The bulge structure 431 between the first connecting piece 41 and the second connecting piece 42 of the deformable piece 4 helps to improve the overall stiffness of the deformable piece 4.

[0201] In one example, to further improve the overall stiffness of the deformation plate 4, reference Figure 11 As shown, the portion between the edge of the third connecting piece 43 and the bulge structure 431 is sheet-like, and the plane on which it is located is not coplanar with the plane on which the first connecting piece 41 is located, so that the sheet-like areas of the first connecting piece 41 and the third connecting piece 43 are bent and connected. This bending connection can improve the stiffness of the deformable piece 4.

[0202] Similarly, continue to refer to Figure 11 As shown, the plane containing the sheet-like area between the edge of the third connecting piece 43 and the bulge structure 431 is not coplanar with the plane containing the second connecting piece 42, so that the sheet-like areas of the second connecting piece 42 and the third connecting piece 43 are bent and connected, thereby improving the stiffness of the deformable piece 4.

[0203] As for the plane where the first connecting piece 41 is located and the plane where the second connecting piece 42 is located, they may be coplanar or not. Since the second connecting piece 42 swings back and forth at high temperature with the first connecting piece 41 as the fulcrum, the planes where the first connecting piece 41 and the second connecting piece 42 are located are coplanar.

[0204] Thus, as the temperature changes, both the first and second metal sheets deform, with the first sheet deforming more than the second. However, due to the greater stiffness of the deformation piece 4, the deformation force of the first metal sheet does not cause the second connecting piece 42 to spring open. When the temperature exceeds a set threshold (such as a first temperature threshold), the deformation force of the first metal sheet further increases, eventually overcoming the stiffness of the entire deformation piece 4. This causes the second connecting piece 42 to bend to the second side and spring open relative to the connecting piece 22 of the second wiring structure 2. Consequently, the moving contact on the first side of the second connecting piece 42 separates from the stationary contact on the connecting piece 22 of the second wiring structure 2.

[0205] It should be noted that the deformable sheet 4 can be a bimetallic sheet structure or a metal sheet made of shape memory alloy.

[0206] As described above, the overload protection module 400 also has a reset button 401. When the first wiring structure 1 and the second wiring structure 2 are disconnected, pressing the button 401 can reset the first wiring structure 1 and the second wiring structure 2 to the electrically connected state. Accordingly, the overload protection module also includes a reset mechanism.

[0207] The features of the reset mechanism are described below.

[0208] like Figure 12 The diagram shown is a structural schematic of the overload protection module. (Refer to...) Figure 12 As shown, the overload protection module also includes a reset mechanism, such as... Figure 13 The diagram shown is a schematic of the reset mechanism. (Refer to...) Figure 13 As shown, the reset mechanism includes a push rod 5 and an elastic element 6. The push rod 5 can also be called a reset rod or reset push rod, etc., and the elastic element 6 is exemplified by a spring.

[0209] refer 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 of the push rod 5 serves as the button 401 of the overload protection module. Therefore, referring to... Figure 5 As shown, the top of push rod 5 passes through the upper cover 32 of module housing 3, reference Figure 1 As shown, the tip of the push rod 5 also passes through the plug housing 100 and is exposed at the top of the plug housing 100. For example, the tip of the push rod 5 is flush with the outer surface of the plug housing 100, or the tip of the push rod 5 extends out of the outer surface of the plug housing 100 for user pressing operation. The elastic element 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31.

[0210] It should be noted that the top of the push rod 5 may also be located inside the plug housing 100 and not exposed. For example, the top of the push rod 5 may be flush with or extend out of the module housing 3 of the overload protection module, but 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.

[0211] like Figure 14 As shown, this is a schematic diagram of the push rod 5. Figure 15 and Figure 16 The diagram shown is a schematic of the push rod 5 before and after it is installed into the bottom shell 31.

[0212] refer to Figure 14 As shown, the bottom of the push rod 5 has a spacer 523. When the button 401 is in the pressed state and the deformation piece 4 is in the reset state, reference... Figure 12 As shown, the partition 523 is located at the bottom of the base 31, specifically between the bottom of the base 31 and the moving contact of the deformable piece 4. That is, the partition 523 is located directly below the moving contact, so that the stationary contact on the connecting piece of the second wiring structure 2 contacts the moving contact on the second connecting piece 42 of the deformable piece 4. When the button 401 is not pressed and the deformable piece 4 is in the reset state, the partition 523 contacts the stationary contact and is sandwiched between the moving contact and the stationary contact, achieving electrical isolation between the moving contact and the stationary contact.

[0213] For example, if the current flowing through the circuit where the overload protection module is located is relatively large, it generates a lot of heat, causing the temperature inside the overload protection module to exceed the preset temperature threshold. The deformation piece 4 deforms, specifically, the second connecting piece 42 of the deformation piece 4 bends around the first connecting piece 41, causing the moving contact on the deformation piece 4 to spring away from the stationary contact on the second wiring structure 2. At this time, the push rod 5 moves upward under the action of the elastic element 6, until the spacer 523 of the push rod 5 is opposite and in contact with the stationary contact. When the temperature inside the overload protection module cools down, the deformation piece 4 resets. However, the moving contact and the stationary contact are now separated by the spacer 523 of the push rod 5. Therefore, the user needs to press button 401 to move the push rod 5 downward until the spacer 523 of the push rod 5 is below the moving contact and no longer between the moving and stationary contacts. At this point, the moving and stationary contacts return to contact, and the overload protection module is restored to the on state.

[0214] Therefore, it can be seen that under normal circumstances—that is, when the internal temperature of the overload protection module does not exceed the temperature threshold that triggers power-off—the reset mechanism engages the moving and stationary contacts within the overload protection module. However, after the internal temperature of the overload protection module returns to normal, the moving and stationary contacts do not automatically engage; instead, a technician must press the button to re-engage them. This prevents the overload protection module from frequently switching on and off in a short period, which is beneficial for its protection. This is because, since the technician pressed button 401 on the reset mechanism, it indicates that the circuit containing the overload protection module has been repaired and restored to normal operation; therefore, overload power-off is unlikely to occur again in the short term.

[0215] Since the reset button is usually in the middle position, please refer to... Figure 12 As shown, the top of the push rod 5 is approximately located at the midpoint of the base shell 31 in the front-rear direction. The second connecting piece 42 of the deformable piece 4 and the connecting piece 22 of the second wiring structure 2 are located at one end of the base shell 31 in the front-rear direction. Therefore, refer to... Figure 14 As shown, the spacer 523 is located at the bottom of the push rod 5 and extends to the side away from the axial center line of the push rod 5.

[0216] For example, refer to Figure 14 As shown, the outer surface of the side wall of the push rod 5 has a first side rib 521, and the spacer 523 is located at the bottom of the first side rib 521 and extends to the side away from the axial center line of the push rod 5. The length direction of the first side rib 521 extends along the axial center line of the push rod 5. For example, the bottom end of the first side rib 521 extends out of the bottom end of the push rod 5 so that the spacer 523 is located at the bottommost position.

[0217] The first side rib 521 is used on the one hand to extend the partition 523 to the side away from the axial center line of the push rod 5, and on the other hand to be snapped into the bottom shell 31.

[0218] For example, refer to Figure 15 As shown, the bottom shell 31 has a channel 314 located near the first sidewall 311. The channel 314 is used to confine the elastic member 6 within it, preventing lateral movement of the elastic member 6 during telescopic motion. The channel wall of the channel 314 has a first channel opening 3141 extending from the top to the bottom 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. Therefore, referring to… Figure 15 As shown, the first side rib 521 can be inserted into the first channel opening 3141, and the partition 523 is located outside the channel 314.

[0219] refer to Figure 15As shown, in order to enable the first side rib 521 to be quickly inserted into the first channel opening 3141, the bottom end of the first side rib 521 has a guide structure.

[0220] Continue to refer to Figure 14 As shown, the side of the push rod 5 also has a second side rib 522. The length of the second side rib 522 extends along the axial center line of the push rod 5. For example, the bottom end of the second side rib 522 extends out of the bottom end of the push rod 5.

[0221] The second side rib 522 is mainly used to be snapped into the bottom shell 31.

[0222] For example, refer to Figure 15 As shown, the channel 314 has a second channel opening 3142 on its channel wall. The second channel opening 3142 extends from the top end of the channel 314 to the bottom end; 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. Therefore, referring to... Figure 15 As shown, the second side rib 522 can be inserted into the second channel opening 3142.

[0223] refer to Figure 15 As shown, in order to enable the second side rib 522 to be quickly inserted into the second channel opening 3142, the bottom end of the second side rib 522 has a guide structure.

[0224] Because the bottom shell 31 is located between the first pole socket 201 and the second pole socket 202, and the width between the first pole socket 201 and the second pole socket 202 is limited, in order to make the width of the bottom shell 31 relatively narrow, correspondingly, refer to Figure 15 As shown, the first side rib 521 and the second side rib 522 are arranged in a front-to-back manner in the front-to-back direction. For example, in the front-to-back direction, the first side rib 521 is in front and the second side rib 522 is behind. Compared with the first side rib 521 and the second side rib 522 being distributed left and right in the width direction, the width of the bottom shell 31 can be shortened.

[0225] As described above, the channel 314 within the bottom shell 31 is close to the first sidewall 311, and the tip of the push rod 5 is positioned midway between the first sidewall 311 and the second sidewall 312, wherein the first sidewall 311 and the second sidewall 312 are positioned opposite each other. Therefore, refer to... Figure 14 As shown, the push rod 5 may include a first rod portion 51 and a second rod portion 52. The second rod portion 52 is located at the bottom of the first rod portion 51, and the axial center line of the first rod portion 51 and the axial center line of the second rod portion 52 are parallel but do not coincide. 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, while the first rod portion 51 is approximately located in the middle position between the first side wall 311 and the second side wall 312.

[0226] Since the first rod portion 51 and the second rod portion 52 are distributed in a direction perpendicular to the first sidewall 311, and the partition plate 523 extends in a direction parallel to the first sidewall 311, the plane containing the axial center line of the first rod portion 51 and the axial center line of the second rod portion 52 is perpendicular to the plane containing the partition plate 523.

[0227] Based on the fact that the second rod portion 52 is at the bottom of the first rod portion 51, the button 401 is at the top of the push rod 5, the spacer 523 is at the bottom of the push rod 5, and the elastic member 6 is compressed between the bottom of the push rod 5 and the bottom of the bottom shell 31, the top of the first rod portion 51 is the button 401, the spacer 523 is located at the bottom of the second rod portion 52 and extends to the side opposite to 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.

[0228] Based on the elastic element 6 being confined within the channel 314 of the bottom shell 31, such as Figure 15 And refer to Figure 16 As shown, the second rod 52 used to press against the elastic member 6 can extend into the channel 314. 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 52 extends into the channel 314 to press against the elastic member 6, and when the push rod 5 is pushed to the bottom, it is assembled into the bottom shell 31.

[0229] refer to Figure 15 As shown, the second rod portion 52 extends into the channel 314, which facilitates the quick insertion of the push rod 5 into the bottom shell 31 and enables automated assembly. This is because the cylindrical second rod portion 52 and the channel 314 with its cylindrical inner surface can achieve circumferential pre-positioning. As long as the second rod portion 52 enters the channel 314, the first side rib 521 can be engaged in the first channel opening 3141, the second side rib 522 can be engaged in the second channel opening 3142, and the spacer 523 can be engaged in the fourth slot 319.

[0230] refer to Figure 8 As shown, there is a channel 314 between the deformable piece 4 and the first sidewall 311, and a gap of width H needs to be reserved between the deformable piece 4 and the second sidewall 312 to allow the second connecting piece 42 of the deformable piece 4 to bend and deform towards the second sidewall 312. The first rod portion 51 of the push rod 5 is located at the midpoint between the first sidewall 311 and the second sidewall 312. The bottom shell 31 is constrained between the first pole socket 201 and the second pole socket 202. Therefore, refer to... Figure 15As shown, the first rod portion 51 has a first cutting plane 511 on the side opposite to the second rod portion 52. The first cutting plane 511 is parallel to the first side wall 311 and extends from the bottom end of the first rod portion 51 to the top end of the first rod portion 51, but does not extend to the top end of the first rod portion 51 (because the top end of the first rod portion 51 also needs to serve as the button 401).

[0231] The side of the channel 314 facing away from the first sidewall 311 has a second tangent plane 3143, which is parallel to the first sidewall 311 and extends through the height of the channel 314.

[0232] So, reference Figure 12 As shown, the deformable piece 4 can be located at the first cutting plane 511 and the second cutting plane 3143. After the deformable piece 4 is installed in the bottom shell 31, the sum of the height of the first cutting plane 511 and the height of the second cutting plane 3143 in the thickness direction is greater than the height of the third connecting piece 43 of the deformable piece 4. This ensures that the top of the deformable piece 4 at the third connecting piece 43 does not contact the cutting plane of the first rod 51 that is perpendicular to the first cutting plane 511, so as to prevent the cutting plane of the first rod 51 that is perpendicular to the first cutting plane 511 from interfering with the bending deformation of the second connecting piece 42 of the deformable piece 4.

[0233] Since the third connecting piece 43 of the deformable piece 4 is located at the first cutting plane 511 and the second cutting plane 3143, and the third connecting piece 43 has a planar area, the first cutting plane 511 and the second cutting plane 3143 are coplanar and on the same plane.

[0234] Continue to refer to Figure 12 As 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.

[0235] 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.

[0236] To facilitate the user pressing the top of push rod 5, refer to the corresponding... Figure 1As shown, the top end of the sleeve 33 is flush with the top surface of the plug housing 100, and the top end of the push rod 5 located in the sleeve 33 is exposed on the top surface of the plug housing 100.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] Furthermore, such as Figure 15 And refer to Figure 16 As shown, the bottom of the bottom shell 31 has a fourth slot 319 for limiting the spacer 523. When the spacer 523 moves down, it is locked into the fourth slot 319, and the spacer 523 is restricted from shaking by the fourth slot 319.

[0241] Referring to Figure 15, the fourth slot 319 has a funnel-shaped opening so that the spacer 523 can smoothly engage in the fourth slot 319 when the button 401 (i.e., the top of the push rod 5) is pressed, making it less likely for the button 401 to get stuck.

[0242] Because the elastic element 6 is compressed between the second rod portion 52 of the push rod 5 and the bottom of the bottom shell 31, if the elastic element 6 is installed first during assembly, it may push the push rod 5 open, making assembly difficult and hindering automated assembly. Therefore, the elastic element 6 can be installed into the bottom shell 31 after the upper cover 32 and the bottom shell 31 are assembled. Figure 17As shown, the bottom of the bottom shell 31 has an installation port 315 at the position corresponding to the channel 314. After the top cover 31 and the bottom shell 31 are fixed, the overload protection module is turned upside down, and the elastic member 6 is inserted from the installation port 315 at the bottom of the bottom shell 31 into the channel 314 inside the bottom shell 31. Then, the sealing plug 7 is used to seal the installation port 315. At this time, the elastic member 6 is compressed between the push rod 5 and the sealing plug 7.

[0243] Because the bottom of the bottom shell 31 is fixed in the plug housing 100, even if the interference effect between the sealing plug 7 and the mounting port 315 is weak, the elastic element 6 will not fall off from the mounting port 315 at the bottom of the bottom shell 31.

[0244] In one example, in order for the sealing plug 7 to be interference-fitted into the mounting opening 315, the sealing plug 7 can be compressed, thereby being inserted into the mounting opening 315. For example, the sealing plug 7 can be a rubber stopper, which has a certain degree of elasticity and can be compressed, thereby being inserted into the mounting opening 315.

[0245] Also refer to Figure 18 As shown, the sealing plug 7 has a groove 71 on its inner end face facing the channel 314. The opening of the groove 71 faces the elastic member 6, and the elastic member 6 abuts against the end face where the opening of the groove 71 is located. The groove 71 allows the sealing plug 7 to contract when inserted into the mounting opening 315, thereby interfering with the mounting opening 315.

[0246] Continue to refer to Figure 17 and Figure 18 As shown, an annular rib 316 is provided on the bottom outer surface of the bottom shell 31 along the mounting opening 315. The annular rib 316 is used to extend the axial length of the mounting opening 315.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] In one example, to facilitate the insertion of the sealing plug 7 into the annular rib 316 and the opening, the corresponding reference is made... Figure 18 As shown, the annular rib 316 has a first guide structure at the opening away from the channel 314 (i.e., there is a chamfer between the end face of the annular rib 316 and the inner surface), and the sealing plug 7 has a second guide structure at the end near the mounting groove (i.e., there is a chamfer between the bottom surface of the sealing plug 7 and the side surface). Then, with the cooperation of the first guide structure and the second guide structure, and with the radial expansion of the annular rib 316, and with the contraction of the sealing plug 7, the sealing plug 7 is interfering with the channel formed by the inner surface of the mounting opening 315 and the inner surface of the annular rib 316.

[0253] In one example, refer to Figure 17 As shown, since the annular rib 316 protrudes relative to the bottom outer surface of the housing 61, in order to stably fix the overload protection module on the pin bracket 200, the inner surface of the pin bracket 200 has a groove 205 (see reference). Figure 2As shown, the overload protection module is fixed on the pin bracket 200, and the annular rib 316 is located in the groove 205, so that the bottom outer surface of the overload protection module can be stably attached to the inner surface of the pin bracket 200.

[0254] Additionally, refer to Figure 17 As shown, the outer surface of the annular rib 316 forms a cylindrical surface, and the inner surface of the groove 205 on the first surface of the pin bracket 200 also forms a cylindrical surface.

[0255] In order to make the bottom shell 31 stable on the first surface of the pin bracket 200, the height of the annular rib 316 protruding from the outer surface of the bottom shell 31 is less than or equal to the depth of the groove 205.

[0256] The above describes the structural features of the overload protection module. The following section introduces the assembly process of the overload protection module based on these features.

[0257] Step 1: Install push rod 5 into bottom shell 31.

[0258] refer to Figure 15 and Figure 16 As shown, the second rod portion 52 of the push rod 5 is aligned with the channel 314. The first side rib 521 extends into the first channel opening 3141 of the channel 314, and the second side rib 522 extends into the second channel opening 3142 of the channel 314. As the push rod 5 continues to slide, the second rod portion 52 of the push rod 5 extends into the channel 314. When the push rod 5 is pushed to the bottom in the bottom shell 31, the partition 523 at the bottom of the push rod 5 is located in the fourth slot 319, and the bottom end of the partition 523 contacts the bottom surface of the bottom shell 31.

[0259] Step 2: Install the fixed deformation sheet 4 and the first wiring structure 1 into the bottom shell 31.

[0260] Specifically, refer to Figure 19 and Figure 20 As shown, after fixing the first connecting piece 41 of the deformation piece 4 and the connecting piece 12 of the first wiring structure 1, they are installed together into the third slot 313, and the transition piece 13 of the first wiring structure 1 is inserted into the first slot 3111.

[0261] The fixing steps of the first connecting piece 41 of the deformable piece 4 and the connecting piece 12 of the first wiring structure 1 can be performed before step one, or after step one and before step two.

[0262] Step 3: Install the second wiring structure 2 into the bottom shell 31.

[0263] Specifically, such as Figure 21 And refer to Figure 22As shown, the slot 231 on the transition piece 23 of the second wiring structure 2 is inserted into the second slot 3112 on the first side wall 311. When it is fully inserted, the assembly of the second wiring structure 2 in the bottom shell 31 is completed.

[0264] Step four, as Figure 22 As shown, the top cover 32 of the module housing 3 is installed on the top of the bottom housing 31.

[0265] For details, please refer to Figure 22 As shown, the second positioning structures 323 (such as cylinders) at the bottom of the upper cover 32 are inserted one by one into the first positioning structures 317 (such as square holes) at the top of the bottom shell 31, thus completing the assembly of the upper cover 32 and the bottom shell 31. After the upper cover 32 and the bottom shell 31 are assembled, refer to... Figure 9 As shown, the first protrusion 321 at the bottom of the top cover 32 presses against the top of the transition piece 13 of the first wiring structure 1, and the second protrusion 322 at the bottom of the top cover 32 presses against the top of the transition piece 23 of the second wiring structure 2.

[0266] Step 5: Insert the elastic element 6 into the bottom shell 31 through the mounting port 315 at the bottom of the bottom shell 31.

[0267] Specifically, first turn the overload protection module upside down, as shown in the reference. Figure 23 As shown, the bottom of the bottom shell 31 faces upward and the top of the top cover 32 faces downward. Then, the elastic member 6 is inserted into the bottom shell 31 through the mounting port 315 at the bottom of the bottom shell 31.

[0268] Step Six, refer to Figure 24 As shown, the sealing plug 7 is inserted into the mounting port 315 to compress the elastic element 6 inserted into the mounting port 315 into the bottom shell 31.

[0269] As can be seen from the above, the assembly of overload protection modules mostly involves snap-fit ​​connections, which makes the assembly process relatively simple, conducive to achieving automated assembly and improving assembly efficiency.

[0270] It should be noted that because the deformation plate 4 is relatively thin and has a certain degree of elasticity, the deformation plate 4 and the first wiring structure 1 can be installed into the bottom shell as a whole first, and then the push rod 5 can be installed into the bottom shell. When installing the push rod 5, the second wiring end 42 of the deformation plate 4 needs to be pried open so that the spacer 523 of the push rod 5 moves down to contact the inner surface of the bottom shell 31.

[0271] After the overload protection module is assembled, it is then mounted on the first surface of the pin bracket 200. (Reference) Figure 2 As shown, the first surface of the pin bracket 200 has a circular countersunk groove 205 and a plurality of fourth positioning structures 206, while the reference... Figure 24As shown, the bottom of the overload protection module has an annular rib 316 and multiple third positioning structures 318. The annular rib 316 at the bottom of the overload protection module is inserted into the recess 205, and the multiple fourth positioning structures 206 cooperate with their corresponding third positioning structures 318. (Refer to...) Figure 4 As shown, the overload protection module can be assembled on the first surface of the pin bracket 200.

[0272] The third positioning structure 318 can be a square hole, and the fourth positioning structure 206 can be a cylinder, or the third positioning structure 318 can be a cylinder, and the fourth positioning structure 206 can be a square hole. The square hole has a guiding structure, and the end face of the cylinder is spherical, to achieve rapid assembly and improve assembly efficiency.

[0273] After the overload protection module 400 is assembled on the first surface of the pin bracket 200, as shown in the figure Figure 3 Based on the above, an encapsulation process is performed to form the plug housing 100.

[0274] The shape of a plug housing 100 can be referenced. Figure 1 As shown, a flat, columnar structure encloses both the pin bracket 200 and the overload protection module 400, while the pin assembly extends out of the plug housing 100. The button 401 of the overload protection module 400 is exposed on the top surface of the plug housing 100. For example, the button 401 is basically flush with the top surface of the plug housing 100.

[0275] Continue to refer to Figure 1 As shown, the plug housing 100 has symmetrical cross-sections on the left and right sides about the center line. These two cross-sections are designed to make it easier for the user to pick up the plug.

[0276] Another plug housing 100 shape reference Figure 25 As shown, the plug housing 100 mainly comprises two parts: one part covers the pin bracket and the other part covers the overload protection module 400. The part covering the pin bracket 200 is called the horizontal part, and the part covering the overload protection module 400 is called the vertical part.

[0277] In one example, to adapt to such Figure 25 The height of the plug housing 100 shown is for reference. Figure 26 As shown, the sleeve 33 at the top of the module housing 3 of the overload protection module 400 is axially perpendicular to the pin bracket 200. The top end of the push rod 5 extends out of the sleeve 33. The sleeve 33 is relatively high, which is used to extend the height of the plug in the thickness direction.

[0278] Continue to refer to Figure 25As shown, the vertical portion of the plug housing 100 has bulge structures 101 on both the left and right sides. The bulge structures 101 on both sides of the vertical portion are symmetrically distributed about the center line of the plug, which is to facilitate the user to take the plug.

[0279] It should be noted that the length of the bulge structure 101 along the front-rear direction of the plug is related to the length L occupied by the portion of the first wiring structure 1 extending out of the module housing 3 and the portion of the second wiring structure 2 extending out of the module housing 3 on one side of the overload protection module 400 in the front-rear direction. The length L occupied by the first wiring structure 1 and the second wiring structure 2 in the front-rear direction can be referenced... Figure 26 As shown.

[0280] Continue to refer to Figure 26 As shown, the outer surface of the bulge structure 101 has an inwardly recessed cylindrical surface, which makes it easy for the user to pick up.

[0281] In this embodiment, the plug integrates an overload protection module. When the current in the circuit where the plug is located is too high, the overload protection module disconnects the circuit to improve electrical safety. Moreover, since the overload protection module is integrated into the plug, there is no need to install an overload protection module in the socket into which the plug is inserted. This saves internal space in the socket, allowing for the placement of more sockets.

[0282] Moreover, the overload protection module is integrated into the existing free space between the first and second pins of the plug, allowing the overload protection module to be integrated into the plug without significantly altering its shape and size.

[0283] The above description is only a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An overload protection module, characterized in that, The overload protection module includes a module housing (3), a first wiring structure (1), a second wiring structure (2), a deformation plate (4), and a reset mechanism; A portion of the first wiring structure (1) and the second wiring structure (2) are located inside the module housing (3), and the other portion extends outside the module housing (3). The deformation plate (4) and the reset mechanism are both located in the module housing (3) and are used to electrically connect and disconnect the first wiring structure (1) and the second wiring structure (2). The module housing (3) includes a bottom shell (31) and a top cover (32). The top end face of the bottom shell (31) has a plurality of first positioning structures (317), and the bottom end face of the top cover (32) has a plurality of second positioning structures (323). The bottom shell (31) and the top cover (32) are positioned by the first positioning structures (317) and the second positioning structures (323). Wherein, the first positioning structure (317) is a square hole and the second positioning structure (323) is a cylinder, or the first positioning structure (317) is a cylinder and the second positioning structure (323) is a square hole.

2. The overload protection module of claim 1, wherein, The deformable piece (4) includes a first connecting piece (41), a second connecting piece (42), and a third connecting piece (43) connected between the first connecting piece (41) and the second connecting piece (42). The first connecting piece (41) is located at the first end of the bottom shell (31), the second connecting piece (42) is located at the second end of the bottom shell (31), and the third connecting piece (43) is located between the first end and the second end of the bottom shell (31). The first connecting piece (41) is lower than or flush with the top end face of the bottom shell (31), the second connecting piece (42) is lower than or flush with the top end face of the bottom shell (31), the third connecting piece (43) is higher than or flush with the top end face of the bottom shell (31), and the top end of the push rod (5) of the reset mechanism is located above the third connecting piece (43). The upper cover (32) is located at the position corresponding to the first connecting piece (41) and the second connecting piece (42), and is lower than the position corresponding to the third connecting piece (43).

3. The overload protection module of claim 1, wherein, The first sidewall (311) of the bottom shell (31) has a first slot (3111) and a second slot (3112). The first wiring structure (1) is snapped into the first slot (3111), and the second wiring structure (2) is snapped into the second slot (3112).

4. The overload protection module according to claim 3, characterized in that, The bottom end face of the upper cover (32) has a first protrusion structure (321) and a second protrusion structure (322). The first protrusion structure (321) is engaged in the first slot (3111) and presses against the top of the first wiring structure (1). The second protrusion structure (322) is engaged in the second slot (3112) and presses against the top of the second wiring structure (2).

5. The overload protection module according to claim 4, characterized in that, The slot shape of the first slot (3111) and the slot shape of the second slot (3112) are trumpet-shaped; The cross-sectional shape of the first protrusion (321) and the cross-sectional shape of the second protrusion (322) are trapezoidal; The outer surface of the first protrusion structure (321) and the inner surface of the first slot (3111) at the slot opening are attached together, and the outer surface of the second protrusion structure (322) and the inner surface of the second slot (3112) at the slot opening are attached together.

6. The overload protection module according to claim 1, characterized in that, The upper cover (32) has a sleeve (33) that extends through the thickness of the upper cover (32) and in a direction away from the upper cover (32). The sleeve (33) and the bottom shell (31) are connected, and the part of the push rod (5) of the reset mechanism that extends out of the top opening of the bottom shell (31) is located in the sleeve (33).

7. The overload protection module according to claim 6, characterized in that, 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 top end face of the sleeve (33), wherein the top end of the sleeve (33) is the end away from the upper cover (32).

8. The overload protection module according to claim 6, characterized in that, The top end face of the sleeve (33) is flush with the top outer surface of the plug housing (100) of the plug where the overload protection module is located.

9. The overload protection module according to claim 1, characterized in that, The bottom outer surface of the bottom shell (31) has a plurality of third positioning structures (318), which are used to cooperate with a plurality of fourth positioning structures (206) on the first surface of the pin bracket (200) of the plug where the overload protection module is located, so as to position the bottom shell (31) on the first surface of the pin bracket (200). Wherein, the third positioning structure (318) is a square hole and the fourth positioning structure (206) is a cylinder, or the third positioning structure (318) is a cylinder and the fourth positioning structure (206) is a square hole.

10. A plug, characterized in that, It includes a plug housing (100), a pin bracket (200), a pin assembly, and an overload protection module (400) as described in any one of claims 1 to 9. The pin bracket (200) has a first pole socket (201) and a second pole socket (202) located on both sides of the center line. The pin assembly includes a first pole pin (301) and a second pole pin (302). The first pole pin (301) is fixed in the first pole socket (201), and the second pole pin (302) is fixed in the second pole socket (202). The pin bracket (200) and the overload protection module (400) are both located in the plug housing (100). The overload protection module (400) is fixed to the first surface of the pin bracket (200) and is located between the first pole socket (201) and the second pole socket (202). The overload protection module (400) has a first wiring structure (1) and a second wiring structure (2). The first wiring structure (1) is electrically connected to the first pole pin (301), and the second wiring structure (2) is used to electrically connect to the first pole wire of the power line that extends into the plug housing (100).

Images