Protection switch and electrical equipment

Abstract

The utility model provides a protection switch and electrical equipment, and relates to the technical field of electrical equipment. The protection switch comprises a shell, a contact piece assembly and a key. Wherein the contact piece assembly is arranged in the shell and has a switch-on state and a switch-off state. The key comprises a body and a push arm which are connected with each other, the contact piece assembly is provided with parts opposite to the body and the push arm respectively, and the body is connected to the shell in a sliding mode. When the body is located at the first position, the contact piece assembly is in an off state, and when the body is located at the second position, the contact piece assembly is in an on state. Under the condition that the protection switch is overloaded, the contact piece assembly can be switched from the on state to the off state, and meanwhile the push arm is driven to drive the body to slide, so that the body is switched from the second position to the first position. Therefore, the number of parts in the protection switch can be reduced, the structure of the protection switch is simplified, and the cost of the protection switch is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a protective switch and electrical equipment. Background Technology

[0002] A protective switch, as a switching device, controls the on / off state of a circuit. Internally, a protective switch contains a contact assembly. Users can control the contact assembly by operating a switch button, causing it to connect or disconnect, thus controlling the circuit's on / off state.

[0003] During the use of the protective switch, an overload may occur. In this case, the contact assembly can automatically disconnect to protect the circuit. After an overload, the switch button and other operating components need to be activated to reconnect the contact assembly.

[0004] This results in a complex structure, high cost, and complicated operation of the protective switch. Utility Model Content

[0005] This application provides a protective switch and electrical device that can simplify the structure of the protective switch, reduce its cost, and make its operation simpler.

[0006] In a first aspect, this application provides a protective switch, including a housing, a contact assembly, and a button. The contact assembly is disposed inside the housing and has an on / off state. The button includes a body and a push arm connected to each other. The contact assembly has portions respectively opposite to the body and the push arm. The body is slidably connected to the housing and can switch between a first position and a second position, thereby switching the contact assembly between the on / off state and the off state.

[0007] When the body is in the first position, the contact assembly is in the open state; when the body is in the second position, the contact assembly is in the closed state. In the event of an overload of the protective switch, the contact assembly can switch from the closed state to the open state, while simultaneously driving the push arm to slide the body, thereby switching the body from the second position to the first position.

[0008] With the above settings, the protective switch can be operated via buttons during normal use and in case of overload, which makes the operation of the protective switch relatively simple.

[0009] Furthermore, it avoids the need for additional components to achieve reset and reconnection after overload, which can reduce the number of parts in the protection switch, simplify the structure of the protection switch, and reduce the cost of the protection switch.

[0010] Optionally, the contact assembly includes a moving contact and a bimetallic contact, wherein in the part of the contact assembly opposite to the body, the bimetallic contact is located on the side of the moving contact away from the body.

[0011] The main body can drive the moving contact to contact the bimetallic contact, thus putting the contact assembly in the ON state, or drive the moving contact to separate from the bimetallic contact, thus putting the contact assembly in the OFF state. The push arm is opposite to part of the bimetallic contact. In the event of an overload of the protective switch, the bimetallic contact deforms and drives the push arm to slide the main body.

[0012] In the embodiments of this application, the moving contact and the bimetallic contact can be in contact or separated so that the contact assembly is in different states.

[0013] In the event of an overload of the protective switch, the bimetallic contact can deform and separate from the moving contact, while the push arm drives the main body to slide to the first position.

[0014] Optionally, the movable contact includes a first contact piece and a first contact point connected to the first contact piece, the first contact point being used to contact the bimetallic contact piece. The side of the first contact piece away from the first contact point is connected to the housing to form a fixing part. The body is used to drive the movable contact piece to move through the portion of the first contact piece between the first contact point and the fixing part.

[0015] In this embodiment, the moving contact can contact the bimetallic contact through the first contact point, so that the contact assembly is in the ON state and the circuit where the protection switch is located is turned on.

[0016] Optionally, the bimetallic contact includes a second contact, a second contact point, and a support frame. One end of the support frame is connected to the housing, and the other end of the support frame is opposite to the push arm for driving the push arm to slide. The second contact is connected inside the support frame, and the second contact point is connected to the side of the second contact away from the other end of the support frame for contacting the moving contact.

[0017] With the above configuration, the support frame can be connected to the housing to install the bimetallic contact inside the housing. Furthermore, in the event of an overload of the protective switch, the support frame can also act as a drive component, driving the push arm to slide.

[0018] The bimetallic contact piece can contact the moving contact piece through the second contact point, so that the contact piece assembly is in the closed state, and the circuit where the protection switch is located is connected.

[0019] Optionally, the protective switch has a first direction and a second direction opposite to the first direction, and the body can slide along the first direction to switch from the second position to the first position, or can slide along the second direction to switch from the first position to the second position.

[0020] In the event of an overload of the protective switch, the support frame deforms, causing the other end of the support frame to approach the main body and push the push arm to slide along the first direction. After the protective switch is overloaded, and the main body switches from the first position to the second position, the main body drives the moving contact to move along the second direction, and the push arm pushes the other end of the support frame along the second direction so that the moving contact contacts the second contact.

[0021] With the above configuration, the push rod and elastic element can cooperate with the body to allow the body to slide and drive the state of the contact assembly to change.

[0022] Optionally, the push arm includes multiple sub-arms, which are spaced apart around the periphery of the body, and each sub-arm has a portion opposite to the contact assembly. In the event of an overload of the protective switch, the contact assembly can drive the multiple sub-arms to slide the body.

[0023] Alternatively, the push arm includes a connecting arm connected to the body. The end of the connecting arm facing the contact assembly is provided with a relief groove. The connecting arms on both sides of the relief groove have portions opposite to the contact assembly. In the event of overload of the protection switch, the contact assembly can drive the connecting arms on both sides of the relief groove to slide the body.

[0024] Thus, the push arm can be configured in different ways to increase the contact between the contact assembly and the push arm, thereby improving the reliability of the drive between the contact assembly and the push arm, reducing the pressure between the contact assembly and the push arm, and decreasing the possibility of damage to the contact assembly.

[0025] Optionally, the protective switch also includes a push rod and an elastic element. The body has a mating hole on the side facing the contact assembly. The push rod passes through the mating hole and can rotate in the mating hole. The elastic element is disposed between the push rod and the contact assembly.

[0026] When the body switches between the second position and the first position, the elastic element drives the push rod to slide and rotate away from the contact assembly, so that the contact assembly is in the disconnected state.

[0027] With the above configuration, the push rod and elastic element can cooperate with the body to allow the body to slide and drive the state of the contact assembly to change.

[0028] Optionally, the housing includes a base and a cover, the base and cover engaging to form a mounting cavity. The contact assembly, push arm, and at least a portion of the body are located within the mounting cavity.

[0029] With the above configuration, the contact assembly, push arm, and at least part of the body can be installed in the mounting cavity. The base and cover can protect the internal contact assembly, push arm, body, etc., reducing the possibility of damage caused by external forces acting directly on the contact assembly, push arm, or body.

[0030] Optionally, the cover is provided with a mounting through hole, the main body is slidably disposed in the through hole, and when the main body is in the second position, at least part of the main body extends out of the cover through the mounting through hole.

[0031] In this way, in both locations on the main body, a portion will protrude from the mounting hole. This makes it easier for the user to press the main body, reducing the possibility of the main body being recessed into the mounting hole, which would make it inconvenient for the user to press.

[0032] Secondly, this application provides an electrical device including any of the protective switches described in the first aspect above.

[0033] The beneficial effects of the electrical equipment provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a protective switch according to an embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the contact assembly after removing the cover of the protective switch in an embodiment of this application, with the contact assembly in the ON state.

[0036] Figure 3 This is a schematic diagram of the contact assembly after removing the cover of the protective switch in an overload state, according to an embodiment of this application.

[0037] Figure 4 This is a schematic diagram of a contact assembly according to an embodiment of this application.

[0038] Figure 5 This is a schematic diagram of the connection between the body and the push arm according to an embodiment of this application.

[0039] Figure 6 This is a schematic diagram of another embodiment of the connection between the body and the push arm.

[0040] Figure 7 This is a schematic diagram of a cover according to an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100: Protective switch; 10: Housing; 101: Base; 102: Cover; 103: Mounting through hole; 1031: Limiting strip; 104: First stop; 105: Second stop; 106: Clearance hole; 20: Contact assembly; 21: Moving contact; 22: Bimetallic contact; 211: First contact; 212: First contact point; 213: Fixing part; 221: Second contact; 222: Second contact point; 223: Support frame; 23: First connecting piece; 24: Second connecting piece; 25: Third connecting piece; 30: Button; 31: Body; 32: Push arm; 321: Sub-arm; 322: Connecting arm; 323: Clearance groove; 33: Push rod; 34: Elastic element; 311: Mating hole; X: First direction; Y: Second direction. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0045] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0047] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the current limiting module of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0049] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection fixed by spacers, such as a connection fixed by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0052] For example, an embodiment of this application provides an electrical device, which includes, as follows: Figure 1 The protective switch 100 shown.

[0053] The protective switch 100 can control the on / off state of the circuit and can also automatically disconnect the circuit in case of overload to ensure electrical safety.

[0054] In electrical equipment equipped with the aforementioned protective switch 100, the connection between the electrical equipment and the power supply can be controlled by the protective switch 100. Furthermore, after the protective switch 100 disconnects the electrical equipment from the power supply due to overload, the user can easily reconnect the protective switch 100 to the power supply.

[0055] In the embodiments of this application, the electrical equipment can be a socket, air conditioner, television, water dispenser, water heater, refrigerator, etc. The specific type of electrical equipment is not specifically limited in the embodiments of this application.

[0056] The protective switch 100 provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0057] Reference Figure 1 and Figure 2 As shown, the protective switch 100 includes a housing 10, a contact assembly 20, and a button 30. The contact assembly 20 is disposed inside the housing 10 and has an on / off state. The button 30 includes a body 31 and a push arm 32 connected to each other. The contact assembly 20 has portions respectively opposite to the body 31 and the push arm 32. The body 31 is slidably connected to the housing 10 and can switch between a first position and a second position, thereby switching the contact assembly 20 between the on / off state and the off state.

[0058] When the main body 31 is in the first position, the contact assembly 20 is in the off state; when the main body 31 is in the second position, the contact assembly 20 is in the on state. In the event of an overload of the protective switch 100, the contact assembly 20 can switch from the on state to the off state, while simultaneously driving the push arm 32 to slide the main body 31, thereby switching the main body 31 from the second position to the first position.

[0059] In this embodiment, the protective switch 100 includes a housing 10 and a contact assembly 20 inside the housing 10. The housing 10 can protect the contact assembly 20 inside, reducing the possibility of damage to the contact assembly 20 caused by external impacts, dust and other physical factors, which could lead to the failure of the protective switch 100.

[0060] The contact assembly 20 has an on state and an off state. Therefore, the protective switch 100 can control the circuit on and off based on the different states of the contact assembly, so that the protective switch 100 can switch between open and closed.

[0061] When the protective switch 100 is open, the contact assembly 20 can be in the ON state, and the circuit containing the protective switch 100 is connected. When the protective switch 100 is closed, the contact assembly can be in the OFF state, and the circuit containing the protective switch 100 is disconnected.

[0062] In this application, the protective switch 100 also includes a button 30, which can serve as a component in the protective switch 100 for receiving user operations, so that the protective switch 100 can switch the contact assembly 20 between an on state and an off state based on the user's operation.

[0063] Specifically, the button 30 includes a body 31 and a push arm 32 connected to each other. The body 31 is slidably connected to the housing 10. When the button 30 receives a user operation, the body 31 can slide relative to the housing 10 to switch between a first position and a second position.

[0064] Since the contact assembly 20 has a portion opposite to the body 31, the body can control the state of the contact assembly 20 when the body 31 slides to switch between a first position and a second position, so that the contact assembly 20 can switch between an off position and an on position.

[0065] Thus, when the protection switch 100 is working normally, the user can control the protection switch 100 to be turned on or off using the button 30.

[0066] In the event of an overload of the protective switch 100, the contact assembly 20 can be directly switched from the ON state to the OFF state. Since the contact assembly 20 also has a portion opposite to the push arm 32, it can also exert a force on the push arm 32 when the contact assembly 20 is activated.

[0067] Specifically, when the contact assembly 20 is in an open state due to overload, the contact assembly 20 can push the push arm 32. Since the push arm 32 is connected to the body 31, when the contact assembly 20 pushes the push arm 32, the push arm 32 can also cause the body 31 to slide, thereby allowing the body 31 to switch from the second position to the first position. See [reference needed] for details. Figure 3 .

[0068] That is, in the event of an overload when the protection switch 100 is working, the contact assembly 20 can automatically disconnect, and during the disconnection process, the push arm 32 drives the body 31 to slide back to the first position.

[0069] With the above settings, if the protection switch 100 is overloaded and needs to be turned on again, button 30 can be pressed again, causing the body 31 to slide from the first position to the second position. Simultaneously, during the sliding process of the body 31, the body 31 can also drive the push arm 32 to slide.

[0070] In this way, the body 31 and the push arm 32 can work together to apply force to the contact assembly 20, so that the contact assembly 20 is in the connected state.

[0071] In summary, the button 30 in this application includes a body 31 and a push arm 32. Both the push arm 32 and the body 31 can apply force to the contact assembly 20, which can take into account both the operation of the protection switch 100 under normal operation and the reset and connection of the protection switch 100 after overload.

[0072] Based on the above analysis, the protective switch 100 in this application is operated by button 30 during normal use and overload, which makes the operation of the protective switch 100 relatively simple.

[0073] Furthermore, it avoids the need for additional components to achieve reset and reconnection after overload, which can reduce the number of parts in the protection switch 100, simplify the structure of the protection switch 100, and reduce the cost of the protection switch 100.

[0074] To make the effects of this application clearer, a comparison is made here between a protective switch in the prior art and the protective switch 100 proposed in this application.

[0075] In related technologies, protective switches have multiple operating elements, and users need to use one of these elements to control the normal operation of the protective switch. When the protective switch is overloaded, the user needs to use another operating element to reset the protective switch, and then press the operating element that controls the normal operation of the protective switch again to turn it on.

[0076] In this application, the control function of the protection switch 100 during normal operation and the reset and turn-on function after overload are integrated into the button 30 component. Obviously, this can reduce the number of components in the protection switch 100, reduce the cost of the protection switch 100, and improve the production efficiency of the protection switch 100.

[0077] Furthermore, since the normal opening and closing of the protection switch 100, as well as its reset and connection, are all accomplished through the operation button 30, the protection switch 100 can be opened again via the button 30 regardless of whether the protection switch 100 is normally closed or overloaded.

[0078] This also reduces the possibility that users need to distinguish different positions when operating the protection switch 100, thus improving the user experience.

[0079] It should be noted that the body 31 and the push arm 32 can be connected by bonding, welding or screwing. In order to further reduce the number of parts and facilitate assembly, the body 31 and the push arm 32 can also be integrally formed.

[0080] In some embodiments, such as Figure 2 and Figure 4 As shown, the contact assembly 20 includes a movable contact 21 and a double gold contact 22. In the part of the contact assembly 20 opposite to the body 31, the double gold contact 22 is located on the side of the movable contact 21 away from the body 31.

[0081] In this embodiment of the application, the moving contact 21 and the bimetallic contact 22 can make contact, so that the contact assembly 20 is in the on state. At this time, the protection switch 100 can be opened and the circuit where the protection switch 100 is located is connected.

[0082] The moving contact 21 can also be separated from the bimetallic contact 22, so that the contact assembly 20 is in the open state. At this time, the protection switch 100 is closed and the circuit where the protection switch 100 is located can be disconnected.

[0083] In the protective switch 100 proposed in this application, the contact and separation of the moving contact 21 and the bimetallic contact 22 can be driven by the body 31 so that the contact assembly 20 can switch between the on state and the off state.

[0084] In this application, the push arm 32 is also opposite to a portion of the bimetallic contact 22. Therefore, when the state of the protective switch 100 changes, the relative positional relationship between the push arm 32 and the bimetallic contact 22 will also change accordingly.

[0085] When the protection switch 100 is working normally and the body 31 slides to drive the moving contact 21, the push arm 32 can move closer to or further away from the bimetallic contact 22.

[0086] In the event of an overload of the protection switch 100, the bimetallic contact 22 can deform to separate from the moving contact 21 and disconnect the circuit containing the protection switch 100.

[0087] Meanwhile, when the double gold contact 22 is deformed, the double gold contact 22 can also drive the push arm 32 to slide the body 31, so that the body 31 slides to the first position, so that the user can press the body 31 again to turn on the protection switch 100.

[0088] It should be noted that when the movable contact 21 is close to the bimetallic contact 22, it can make the contact assembly 20 connected, and when the movable contact 21 is away from the bimetallic contact 22, it can make the contact assembly 20 disconnected.

[0089] Therefore, when the protection switch 100 is working normally, for the body 31, the first position is the position that is far away from the bimetallic contact 22, and the second position is the position that is close to the bimetallic contact 22.

[0090] It should also be noted that when the protection switch 100 is overloaded, the current flowing through the protection switch 100 will increase. When the current flows through the bimetallic contact 22, the temperature of the bimetallic contact 22 will rise, which will cause the bimetallic contact 22 to deform and push the push arm 32 to slide.

[0091] The bimetallic contact 22 is composed of metals with different coefficients of thermal expansion. When the temperature rises, the two metals expand to different degrees, causing the bimetallic sheet to bend and deform.

[0092] In this embodiment, when the double gold contact 22 is deformed, a portion of it will bend toward the side closer to the body 31, and the push arm 32 can be opposite to this portion of the double gold contact 22 that is bent toward the side closer to the body 31.

[0093] Thus, when the dual gold contact 22 deforms, the dual gold contact 22 can push the push arm 32 toward the side closer to the body 31, so that the body 31 slides to the first position.

[0094] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the movable contact 21 includes a first contact 211 and a first contact point 212 connected to the first contact 211. The first contact point 212 is used to contact the bimetallic contact 22. The side of the first contact 211 away from the first contact point 212 is connected to the housing 10, forming a fixing part 213. The body 31 is used to drive the movable contact 21 to move through the portion of the first contact 211 between the first contact point 212 and the fixing part 213.

[0095] In this embodiment of the application, the first contact 212 is connected to the first contact piece 211, and the first contact piece 211 can carry the first contact 212. Thus, the first contact 212 can be installed inside the protective switch 100 through the first contact piece 211.

[0096] Specifically, a fixing part 213 can be formed on the side of the first contact piece 211 away from the first contact point 212, and the first contact piece 211 can be connected to the housing 10 through the fixing part 213.

[0097] During normal operation of the protection switch 100, the user can operate the body 31 to slide so that the body 31 can exert force on the first contact piece 211 between the first contact 212 and the fixing part 213. As a result, the first contact piece 211 can move relative to the bimetallic contact piece 22 so that the first contact 212 can contact or separate from the bimetallic contact piece 22, thereby completing the opening or closing of the protection switch 100.

[0098] In some embodiments, such as Figures 1 to 4 As shown, the dual-metal contact 22 includes a second contact 221, a second contact point 222, and a support frame 223. One end of the support frame 223 is connected to the housing 10, and the other end of the support frame 223 is opposite to the push arm 32 for driving the push arm 32 to slide. The second contact 221 is connected inside the support frame 223, and the second contact point 222 is connected to the side of the second contact 221 opposite to the other end of the support frame 223 for contacting the movable contact 21.

[0099] In this application, the support frame 223 can be connected to the housing 10 to install the bimetallic contact 22 inside the housing 10. Furthermore, in the event of an overload of the protective switch 100, the support frame 223 can also function as a drive element to drive the push arm 32 to slide.

[0100] Specifically, the support frame 223 has one opposite end and another opposite end. One end of the support frame 223 can be connected to the housing 10, and the other end of the support frame 223 can be opposite to the push arm 32. Thus, when the dual gold contact 22 deforms, the support frame 223 can push the push arm 32 to slide through its other end.

[0101] In this embodiment, the second contact piece 221 is connected inside the support frame 223, and the second contact piece 221 can be installed through the support frame 223.

[0102] The second contact 222 is connected to the side of the second contact piece 221 away from the other end of the support frame 223, and is used to contact the first contact 212 on the moving contact piece 21 so that the contact piece assembly 20 is in the on state.

[0103] In some embodiments, such as Figure 2 As shown, the protection switch 100 has a first direction X and a second direction Y opposite to the first direction X. The body 31 can slide along the first direction X to switch from the second position to the first position, or it can slide along the second direction Y to switch from the first position to the second position.

[0104] Thus, the body 31 can slide back and forth, allowing it to switch between the first position and the second position.

[0105] In the event of an overload of the protective switch 100, the support frame 223 deforms, causing the other end of the support frame 223 to approach the body 31 and push the push arm 32 to slide along the first direction X. After the protective switch 100 is overloaded, and the body 31 switches from the first position to the second position, the body 31 drives the movable contact 21 to move along the second direction Y, and the push arm 32 pushes the other end of the support frame 223 along the second direction Y, so that the movable contact 21 contacts the second contact 222.

[0106] With the above configuration, in the event of overload deformation of the dual metal contact 22, the portion of the support frame 223 opposite to the push arm 32 can deform along the first direction X. Thus, the support frame 223 can push the body 31 to slide along the first direction X, causing the body 31 to slide to a first position, such as... Figure 3 As shown.

[0107] After the protection switch 100 is overloaded, the body 31 can be operated to slide along the second direction Y to control the protection switch 100 to reopen.

[0108] During this process, the main body 31 can drive the movable contact 21 to move, and at the same time, the main body 31 can drive the push arm 32 to push the support frame 223. In this way, the first contact 212 and the second contact 222 can approach each other and make contact, so that the contact assembly 20 is reconnected.

[0109] In this embodiment, the push arm 32 can be configured in different ways to connect with the body 31 and push the contact assembly 20. The following two methods are used as examples for illustration.

[0110] Method 1, such as Figure 3 and Figure 5 As shown, the push arm 32 includes multiple sub-arms 321, which are spaced apart around the periphery of the body 31, and each sub-arm 321 has a portion opposite to the contact assembly 20. In the event of an overload of the protective switch 100, the contact assembly 20 can drive the multiple sub-arms 321 to slide the body 31.

[0111] With the above settings, when the protection switch 100 is overloaded, the contact assembly 20 can push multiple sub-arms 321 to slide so that the main body 31 can switch from the second position to the first position.

[0112] Correspondingly, when the body 31 slides to drive the contact assembly 20 to be turned on by the push arm 32, all the push arms 32 have a driving effect on the contact assembly 20.

[0113] In this way, the contact area between the contact assembly 20 and the push arm 32 can be larger, which can improve the reliability of the drive between the contact assembly 20 and the push arm 32, reduce the pressure between the contact assembly 20 and the push arm 32, and reduce the possibility of damage to the contact assembly 20.

[0114] It should be noted that when the contact assembly 20 includes a moving contact 21 and a double gold contact 22, multiple sub-arms 321 can be opposite to the support frame 223 on the double gold contact 22.

[0115] It should also be noted that the number of sub-arms 321 can be 2, 3, 4, etc. The specific number of sub-arms 321 is not specifically limited in this embodiment of the application.

[0116] Of course, the number of sub-arms 321 can also be 1. In order to increase the contact area between the sub-arm 321 and the contact assembly 20, the cross-sectional area of ​​the sub-arm 321 can be set to be larger.

[0117] Method 2, such as Figure 3 and Figure 6 As shown, the push arm 32 includes a connecting arm 322, which is connected to the body 31. The end of the connecting arm 322 facing the contact assembly 20 is provided with a relief groove 323. The connecting arms 322 on both sides of the relief groove 323 have a portion opposite to the contact assembly 20. When the protection switch 100 is overloaded, the contact assembly 20 can drive the connecting arms 322 on both sides of the relief groove 323 to slide the body 31.

[0118] With the above configuration, the end of the connecting arm 322 facing the contact assembly 20 can be divided into two parts by the clearance groove 323. Thus, the connecting arm 322 can be driven by the contact assembly through the parts located on both sides of the clearance groove 323 respectively.

[0119] Based on this, when the connecting arm 322 forms a push arm 32, based on the setting of the clearance groove 323, multiple parts that can contact the contact assembly 20 can be formed on one connecting arm 322.

[0120] When the contact assembly 20 includes a movable contact 21 and a bimetallic contact 22, the clearance groove 323 can be opposite to the movable contact 21, and the connecting arms 322 on both sides of the clearance groove 323 can be opposite to the support frame 223 on the bimetallic contact 22.

[0121] Based on the above settings, the clearance groove 323 can avoid the movable contact piece 21, reducing the possibility of affecting the movement of the movable contact piece 21 during the sliding process of the connecting arm 322.

[0122] At the same time, it can also increase the contact area between the contact assembly 20 and the push arm 32, improve the reliability of the drive between the contact assembly 20 and the push arm 32, and reduce the pressure between the contact assembly 20 and the push arm 32, thereby reducing the possibility of damage to the contact assembly 20.

[0123] Of course, the push arm 32 can also have other configurations, and this application embodiment does not specifically limit them. As long as the push arm 32 has a portion opposite to the double metal contact 22, can push against the double metal contact 22, and does not affect the movement of the moving contact 21, it is acceptable.

[0124] In some embodiments, such as Figure 1 and Figure 2As shown, the housing 10 includes a base 101 and a cover 102, which are fastened together, forming a mounting cavity between the base 101 and the cover 102. The contact assembly 20, the push arm 32, and at least a portion of the body 31 are located in the mounting cavity.

[0125] With the above configuration, the contact assembly 20, the push arm 32, and at least part of the body 31 can be installed in the mounting cavity. The base 101 and the cover 102 can protect the internal contact assembly 20, push arm 32, body 31, etc., reducing the possibility of damage caused by external forces directly acting on the contact assembly 20, push arm 32, or body 31.

[0126] In addition, during installation, the cover 102 can be removed and reconnected after the contact assembly 20, push arm 32 and button 30 are installed, which facilitates the assembly of the protection switch 100.

[0127] In this embodiment, the body 31 may be entirely located in the mounting cavity, or it may be partially located in the mounting cavity while the other part extends out of the mounting cavity.

[0128] It should be noted that the base 101 can be provided with multiple snap-fit ​​slots, and one end of the support frame 223 and the fixing part 213 can be respectively embedded in different snap-fit ​​slots to realize the installation of the contact assembly 20.

[0129] The base 101 can be connected to a first stop 104 and a second stop 105. The first stop 104 and the second stop 105 are connected to form a stepped structure, and the size of the first stop 104 is smaller than the size of the second stop 105.

[0130] A snap-fit ​​groove can be provided at the first stop 104, and one end of the support frame 223 can be located in the snap-fit ​​groove at the first stop 104.

[0131] Thus, the second stop 105 can limit the deformation of the bimetallic contact 22. That is, when the bimetallic contact 22 deforms due to overload, the side of the support frame 223 away from the first stop 104 can deform along the first direction X, while the end of the second contact 221 where the second contact 221 is located will move along the second direction Y.

[0132] During the movement of the second contact 221, the second contact 221 can overlap with the second stop 105. In this way, the direct contact between the second contact 221 and the base 101 can be reduced, which may cause damage to the second contact 221.

[0133] It should also be noted that, such as Figures 2 to 4As shown, a first connecting piece 23 can be connected to the moving contact 21, and a second connecting piece 24 can be connected to the bimetallic contact 22. The first connecting piece 23 and the second connecting piece 24 can extend from the mounting cavity to serve as the wiring positions for the protective switch 100, so that the protective switch 100 can be connected in the circuit.

[0134] The first connecting piece 23 and the second connecting piece 24 can connect the live wire of the circuit, so that the live wire can be disconnected when the moving contact piece 21 and the bimetallic contact piece 22 are separated.

[0135] The protective switch 100 may also be provided with a third connecting piece 25, which extends out of the mounting cavity and can be used as a position for connecting the neutral wire.

[0136] In addition, for ease of connection, terminals can be connected to the first connecting piece 23, the second connecting piece 24 and the third connecting piece 25, so that wiring can be completed through the terminals during subsequent wiring.

[0137] In addition, the base 101 and the cover 102 can be connected in different ways, such as snap-fit, screw-fit, riveting, etc. The specific connection method between the base 101 and the cover 102 is not specifically limited in this embodiment.

[0138] In some embodiments, such as Figure 2 , Figure 5 and Figure 7 As shown, the cover 102 is provided with a mounting through hole 103, the body 31 is slidably disposed in the through hole, and when the body 31 is in the second position, at least part of the body 31 extends out of the cover 102 through the mounting through hole 103.

[0139] According to the foregoing description, for the main body 31, the first position is the position that is far away from the dual gold contact 22, and the second position is the position that is close to the dual gold contact 22.

[0140] Since at least a portion of the body 31 protrudes through the mounting through hole 103 when the body 31 is in the second position, a portion of the body 31 also protrudes from the mounting through hole 103 when the body 31 is in the first position.

[0141] That is, at both positions of the main body 31, a portion of it will protrude from the mounting through hole 103. This makes it easier for the user to press the main body 31, reducing the possibility that the main body 31 will be recessed into the mounting through hole 103, making it inconvenient for the user to press.

[0142] Furthermore, the mounting through hole 103 allows the body 31 to slide along the wall of the mounting through hole 103. That is, the mounting through hole 103 also has a limiting and guiding function for the body 31, which can reduce the possibility of the body 31 deviating during sliding.

[0143] It should be noted that the mounting through hole 103 can penetrate the cover 102 along the first direction X and communicate with the mounting cavity.

[0144] It should also be noted that, such as Figure 5 and Figure 7 As shown, the push arm 32 is connected to the periphery of the body 31. In order to reduce the interference between the push arm 32 and the cover 102 during the sliding process, the cover 102 can also be provided with a clearance hole 106 on the side facing the base 101. The clearance hole 106 is opposite to the push arm 32.

[0145] Thus, when the push arm 32 slides along the first direction X, the push arm 32 can extend into the clearance hole 106.

[0146] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, the protective switch 100 also includes a push rod 33 and an elastic element 34. The body 31 is provided with a mating hole 311 on the side facing the contact assembly 20. The push rod 33 passes through the mating hole 311 and can rotate in the mating hole 311. The elastic element 34 is disposed between the push rod 33 and the contact assembly 20.

[0147] When the body 31 switches between the second position and the first position, the elastic element 34 drives the push rod 33 to slide and rotate away from the contact assembly 20, so that the contact assembly 20 is in the disconnected state.

[0148] With the above configuration, the push rod 33 and the elastic element 34 can cooperate with the body 31 so that the body 31 can slide and drive the contact assembly 20 to change its state.

[0149] The push rod 33 can be inserted into the mating hole 311. Since the elastic element 34 is disposed between the push rod 33 and the contact assembly 20, when the body 31 slides along the second direction Y, the body 31 can drive the push rod 33 and the elastic element 34 to slide along the second direction Y as well. The push rod 33 can also compress the elastic element 34.

[0150] Thus, the force exerted by the elastic element 34 on the movable contact 21 increases, which allows the portion of the first contact 211 between the first contact point 212 and the fixed part 213 to approach the bimetallic contact 22, thereby allowing the first contact 212 to contact the second contact point 222.

[0151] When the body 31 slides along the first direction X, the body 31 cancels the force on the push rod 33 in the second direction Y. At this time, the elastic element 34 can push the push rod 33 to slide along the first direction X under its own elastic force. At the same time, the elastic element 34 will also reduce the force on the moving contact 21 due to its elongation, so that the moving contact 21 also slides along the first direction X and moves away from the double metal contact 22, thereby allowing the first contact 212 to separate from the second contact 222.

[0152] It should be noted that the mating hole 311 can extend along the first direction X so that the push rod 33 can slide with the body 31.

[0153] It should also be noted that the elastic element 34 can be a spring, a sheet, or other components made of elastic material. The specific type of elastic element 34 is not specifically limited in this embodiment.

[0154] In this embodiment, the body 31 has a drive tooth on the side facing the contact assembly 20, and the push rod 33 has at least two mating teeth. When the body 31 and the push rod 33 slide relative to each other, the drive tooth can engage with the mating teeth, causing the push rod 33 to rotate.

[0155] That is, the driving teeth can mesh with the mating teeth so that the push rod 33 can also rotate in the mating hole 311 during the sliding process.

[0156] Specifically, the meshing of the driving tooth and the mating tooth can be achieved by the driving tooth sliding into the gap between two adjacent mating teeth and driving the push rod 33 to rotate along the side of the mating tooth.

[0157] In this application, the sliding of the body 31 can be caused by the user pressing the body 31. Therefore, when the user releases the pressure, the force on the body 31 disappears. At this time, the body 31 is easily slid along the first direction X under the action of the elastic element 34, thereby causing the contact assembly 20 to be in the disconnected state.

[0158] To ensure that the contact assembly 20 remains in the ON state after the user cancels the press, a limiting strip 1031 can be provided on the housing 10. Specifically, the limiting strip 1031 can be provided on the wall of the mounting through hole 103, and the side of the limiting strip 1031 facing the contact assembly 20 can engage with the mating teeth, such as... Figure 2 and Figure 7 As shown.

[0159] Thus, when the user presses the body 31 and causes it to slide along the second direction Y, the compression of the elastic element 34 will cause the push rod 33 to move closer to the body 31. As a result, a larger portion of the push rod 33 is located in the mating hole 311, which allows the push rod 33 to move closer to the limiting strip 1031.

[0160] With both the drive teeth and the limiting strip 1031 extending into the gap between the mating teeth, the limiting strip 1031 can limit the push rod 33, reducing the possibility that the push rod 33 will continue to slide along the first direction X.

[0161] At this time, even if the user cancels the press on the main body 31, the push rod 33 will not slide along the first direction X under the action of the elastic element 34, which will cause the contact assembly 20 to be in the wrong open state.

[0162] When the user needs to turn off the protection switch 100, the main body 31 can be pressed again, so that the main body 31 can push the push rod 33 to slide along the second direction Y, and the push rod 33 can rotate in the mating hole 311.

[0163] As the body 31 continues to slide, the limiting strip 1031 can be misaligned with the mating teeth. At this time, the limiting strip 1031 cancels its limitation on the push rod 33. At this time, the elastic element 34 can push the push rod 33 and the body 31 to slide along the first direction X under its own elastic force. At the same time, the force exerted by the elastic element 34 on the moving contact 21 decreases, which can separate the moving contact 21 from the bimetallic contact 22.

[0164] It should be noted that the above description of the mounting through hole 103, body 31, elastic element 34 and push rod 33 mainly describes their working principle. The specific matching relationship of these components, the driving teeth, the mating teeth and the positional relationship between the limit strip 1031 are already relatively mature existing technologies. This application embodiment will not repeat them here. For details, you can refer to similar structures in related technologies such as ratchet switches and push-button ballpoint pens.

[0165] In summary, the button 30 in this application includes a body 31 and a push arm 32. Both the push arm 32 and the body 31 can apply force to the contact assembly 20, which can take into account both the operation of the protection switch 100 under normal operation and the reset and connection of the protection switch 100 after overload.

[0166] Based on the above analysis, the protective switch 100 in this application is operated by button 30 during normal use and overload, which makes the operation of the protective switch 100 relatively simple.

[0167] Furthermore, it avoids the need for additional components to achieve reset and reconnection after overload, which can reduce the number of parts in the protection switch 100, simplify the structure of the protection switch 100, and reduce the cost of the protection switch 100.

[0168] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective switch, characterized in that, include: case; The contact assembly is located inside the housing and has an on state and an off state; A button includes a body and a push arm connected to each other. The contact assembly has portions that are respectively opposite to the body and the push arm. The body is slidably connected to the housing and can be switched between a first position and a second position so that the contact assembly can switch between the on state and the off state. When the body is in the first position, the contact assembly is in the disconnected state; when the body is in the second position, the contact assembly is in the connected state. In the event of an overload of the protection switch, the contact assembly can switch from the ON state to the OFF state, while simultaneously driving the push arm to slide the body, so that the body switches from the second position to the first position.

2. The protective switch according to claim 1, characterized in that, The contact assembly includes a movable contact and a bimetallic contact. In the portion of the contact assembly opposite to the body, the bimetallic contact is located on the side of the movable contact away from the body. The main body can drive the movable contact to move to contact the bimetallic contact, so that the contact assembly is in the on state, or drive the movable contact to move to separate from the bimetallic contact, so that the contact assembly is in the off state; The push arm is opposite to a portion of the bimetallic contact piece. When the protection switch is overloaded, the bimetallic contact piece deforms and drives the push arm to slide the body.

3. The protective switch according to claim 2, characterized in that, The movable contact includes a first contact piece and a first contact point connected to the first contact piece, the first contact point being used to contact the bimetallic contact piece; The side of the first contact piece away from the first contact point is connected to the housing to form a fixing part; The body is used to drive the movable contact to move through the portion of the first contact between the first contact and the fixed part.

4. The protective switch according to claim 2, characterized in that, The dual-metal contact includes a second contact, a second contact point, and a support frame. One end of the support frame is connected to the housing, and the other end of the support frame is opposite to the push arm, used to drive the push arm to slide. The second contact piece is connected inside the support frame, and the second contact point is connected to the side of the second contact piece away from the support frame, for contacting the moving contact piece.

5. The protective switch according to claim 4, characterized in that, The protective switch has a first direction and a second direction opposite to the first direction, and the body can slide along the first direction to switch from the second position to the first position; In the event of an overload of the protective switch, the support frame deforms, causing the other end of the support frame to approach the main body and push the push arm to slide along the first direction; When the protection switch is overloaded and the body switches from the first position to the second position, the body drives the movable contact to move along the second direction, and the push arm pushes the other end of the support frame along the second direction so that the movable contact contacts the second contact.

6. The protective switch according to claim 1, characterized in that, The push arm includes multiple sub-arms, which are spaced apart around the periphery of the main body. Each sub-arm has a portion opposite to the contact assembly. In the event of an overload of the protection switch, the contact assembly can drive the multiple sub-arms to slide the main body. Alternatively, the push arm includes a connecting arm connected to the body. One end of the connecting arm facing the contact assembly is provided with a clearance groove. The portions of the connecting arm located on both sides of the clearance groove each have a portion opposite to the contact assembly. In the event of an overload of the protection switch, the contact assembly can drive the portions of the connecting arms on both sides of the clearance groove to slide the body.

7. The protective switch according to claim 1, characterized in that, The protective switch also includes a push rod and an elastic element. The body has a mating hole on the side facing the contact assembly. The push rod passes through the mating hole and can rotate in the mating hole. The elastic element is disposed between the push rod and the contact assembly. When the body switches between the second position and the first position, the elastic element drives the push rod to slide and rotate away from the contact assembly, so that the contact assembly is in the disconnected state.

8. The protective switch according to claim 1, characterized in that, The housing includes a base and a cover, the base and the cover being fastened together, forming an installation cavity between the base and the cover; The contact assembly, push arm, and at least a portion of the body are located within the mounting cavity.

9. The protective switch according to claim 8, characterized in that, The cover is provided with a mounting through hole, the body is slidably disposed in the through hole, and when the body is in the second position, at least part of the body extends out of the cover through the mounting through hole.

10. An electrical appliance, characterized in that, The electrical equipment includes the protective switch as described in any one of claims 1-9.

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