An overload protection switch and power strip

Abstract

The application provides an overload protection switch and an extension socket, relates to the technical field of switches, and can easily distinguish whether the extension socket is in an open state due to an abnormal working state of a circuit in which the extension socket is located or due to operation of an operator. The overload protection switch comprises a shell, a bimetallic strip, a movable contact, a driving assembly and a reset member. When the overload protection switch is in a normal working state, the bimetallic strip is in a contact state. When the overload protection switch is in an abnormal working state, the bimetallic strip is in a disengaged state. The movable contact is arranged at a driving end of the driving assembly. The reset member is used for driving contact with the bimetallic strip. The reset member has a display position and a hidden position relative to the shell. When the bimetallic strip is in the disengaged state, the reset member is in the display position, and one end of the reset member protrudes from the shell. When the bimetallic strip is in the contact state, the reset member is in the hidden position, and the reset member is located in the shell.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to an overload protection switch and a power strip. Background Technology

[0002] A power strip (also known as a power outlet or extension cord) is an electrical accessory used to expand power outlets. It typically has multiple sockets, allowing for simultaneous power supply to multiple devices. The switch on the power strip is the component that controls whether the entire power strip is open or closed.

[0003] A switch typically consists of a bimetallic strip and a moving contact. The moving contact has a contact position and a non-contact position. When the moving contact is in the contact position, the bimetallic strip is in contact with the moving contact, the circuit current is connected, and the switch is in the closed state. Correspondingly, the power strip is in the closed state. When the moving contact is in the non-contact position, the bimetallic strip is no longer in contact with the moving contact, the circuit current is disconnected, the switch is in the open state, and correspondingly, the power strip is in the open state.

[0004] When the moving contact is in the contact position and the power strip is in the closed state, and an abnormal operating condition such as overload or short circuit occurs in the circuit containing the power strip, the current through the bimetallic strip increases, causing the bimetallic strip to deform. This causes the bimetallic strip to lose contact with the moving contact, the current in the switch circuit is interrupted, and the power strip is in the open state.

[0005] In existing technologies, it is often impossible to distinguish whether the power strip is in a disconnected state due to an abnormal working state of the circuit in which it is located, or due to the operator's operation. Utility Model Content

[0006] This application provides an overload protection switch and a power strip, which can easily distinguish whether the power strip is in an open state due to an abnormal working state of the circuit in which it is located, or due to operator operation.

[0007] To achieve the above objectives, in a first aspect, this application provides an overload protection switch, which includes a housing, a bimetallic strip, a moving contact, a drive assembly, and a reset member. The bimetallic strip is disposed within the housing. The bimetallic strip has a contact state and a disengaged state. When the overload protection switch is in normal operation, the bimetallic strip is in the contact state. When the overload protection switch malfunctions, the bimetallic strip is in the disengaged state. The moving contact is disposed within the housing. The drive assembly is disposed within the housing, and the moving contact is disposed at the drive end of the drive assembly. The reset member is movably disposed within the housing along a first direction. The reset member is used to drive contact with the bimetallic strip. The reset member has a display position and a hidden position relative to the housing. When the bimetallic strip is in the disengaged state, the reset member is in the display position, with one end protruding from the housing. When the bimetallic strip is in the contact state, the reset member is in the hidden position, located within the housing.

[0008] When the above technical solution is adopted, the bimetallic strip is in contact when the overload protection switch is in normal working condition, and the reset element is in a hidden position. The operator can drive the moving contact to switch between the contact position and the disengagement position through the drive assembly.

[0009] The moving contact has a contact position and a non-contact position. When the moving contact is in the contact position, it is in contact with the bimetallic strip, the current in the circuit of the overload protection switch is connected, and the overload protection switch is in the closed state. When the moving contact is in the non-contact position, it is no longer in contact with the bimetallic strip, the current in the circuit of the overload protection switch is disconnected, and the overload protection switch is in the open state.

[0010] Therefore, when the overload protection switch is in the closed state and in normal operating condition, the bimetallic strip is in contact, the reset element is in the hidden position, and the moving contact is in contact. At this time, the operator can drive the moving contact through the drive assembly to switch the moving contact from the contact position to the disengagement position, so that the moving contact is no longer in contact with the bimetallic strip, and the overload protection switch switches from the closed state to the open state.

[0011] When the overload protection switch is in the closed state, and an abnormal operating condition such as overload or short circuit occurs in the circuit containing the overload protection switch, the bimetallic strip switches from the contact state to the disengaged state. During the switching process, the bimetallic strip drives the reset element to switch from a hidden position to a displayed position. When the reset element is in the displayed position, one end of the reset element protrudes from the housing. Simultaneously, the current in the circuit containing the overload protection switch is interrupted, and the overload protection switch is in the open state. At this time, the operator can observe that the reason the overload protection switch is in the open state is due to an abnormal operating condition in the circuit containing the overload protection switch by observing that one end of the reset element protrudes from the housing.

[0012] Accordingly, operators can more easily distinguish whether the power strip is disconnected due to an abnormal working state of the circuit in which it is located, or due to operator operation.

[0013] In one possible implementation, the housing has a through hole extending in a first direction, and the wall of the through hole has multiple protrusions extending in the first direction, evenly distributed circumferentially around the through hole. The driving assembly includes a pressing rod, a locking member, and an elastic member. The pressing rod is slidably fitted within the through hole. The pressing rod includes multiple pressing teeth evenly distributed circumferentially around the pressing rod. A sliding groove is formed between two adjacent pressing teeth, corresponding to the protrusions. The locking member is slidably fitted within the through hole and includes multiple locking teeth for engaging with the pressing teeth, evenly distributed circumferentially around the locking member. A clearance groove is formed between two adjacent locking teeth. The locking member has a released position and a limited position relative to the housing. When the locking member is in the released position, the protrusions correspond to the clearance grooves, and the pressing teeth engage with the locking teeth. When the locking member is in the limited position, the protrusions abut against the locking teeth. The two ends of the elastic element act elastically on the moving contact and the locking element respectively. The elastic element is used to apply a force to the moving contact to switch from the disengaged position to the contact position.

[0014] When the above technical solution is adopted, the moving contact is in the contact position when the overload protection switch is in the closed state, and the end of the protrusion near the base abuts against the bottom of the corresponding locking tooth groove. When the operator drives the pressing rod to move towards the bottom of the base, the end of the pressing tooth near the base contacts the corresponding locking tooth.

[0015] As the pressing rod is further driven, the pressing tooth contacts the groove wall of the corresponding locking tooth, and the protrusion disengages from the corresponding locking tooth. The elastic element is further compressed, and under the action of the pressing tooth and the locking tooth, it can drive the locking element to move towards the bottom of the housing while rotating, so that the protrusion corresponds to the relief groove, the protrusion is located in the relief groove, the pressing tooth and the locking tooth mesh, and the moving contact is in the disengaged position. This causes the overload protection switch to switch from the closed state to the open state.

[0016] In this situation, when the operator drives the pressing rod to move towards the bottom of the base, the elastic element is compressed. Under the action of the pressing teeth and locking teeth, the locking element can be driven to move towards the bottom of the housing while rotating, so that the protrusion abuts against the bottom of the locking tooth groove, and the moving contact is in the contact position, thereby switching the overload protection switch from the open state to the closed state.

[0017] In one possible implementation, the push rod is a hollow structure. The locking element also includes an extension that is slidably fitted inside the push rod.

[0018] When the above technical solution is adopted, the fit between the pressing rod and the locking component can be improved, and the stability and accuracy of the drive component in switching the moving contact piece between the contact position and the disengagement position can be enhanced.

[0019] In one possible implementation, the number of protrusions is four.

[0020] In one possible implementation, the elastic element is a spring.

[0021] When using the above technical solution, the spring can store energy through elastic deformation and release energy when the deformation recovers, resulting in high energy conversion efficiency. The spring also exhibits excellent impact resistance and fatigue resistance, leading to a longer service life.

[0022] In one possible implementation, the overload protection switch also includes a button that is responsively mounted on the push rod, with the push surface of the button located outside the housing.

[0023] When using the above technical solution, the operator can operate the pressing lever via a button to control the drive assembly to switch the moving contact piece between the contact and disengagement positions. The button design improves operational efficiency and safety, meeting the operator's experience requirements.

[0024] In one possible implementation, the button has a through hole corresponding to one end of the reset element. When the reset element is in the display position, one end of the reset element can pass through the through hole and protrude from the pressing surface.

[0025] When the above technical solution is adopted, it is easier for operators to observe the position of the reset component more intuitively in order to determine whether the overload protection switch is in an abnormal working state.

[0026] Furthermore, on a plane perpendicular to the first direction, the orthographic projection of the reset component lies within the orthographic projection of the pressing surface, indicating that the pressing surface has a large area, making it easier for operators to handle.

[0027] In one possible implementation, the reset element includes a drive rod, a connecting rod, and a display rod, with both ends of the connecting rod connected to the drive rod and the display rod, respectively. The end of the drive rod furthest from the connecting rod is used to make drive contact with the bimetallic strip.

[0028] In one possible implementation, the axes of the display lever and the pressing lever are collinear, and one end of the display lever can slidably extend into the pressing lever and the locking element.

[0029] When the above technical solution is adopted, the setting of the display rod can limit the pressing rod and the locking part, ensuring that the axes of the pressing rod and the locking part can be collinear, improving the fit between the pressing rod and the locking part, and enhancing the stability and accuracy of the drive component in switching the moving contact piece between the contact position and the disengagement position.

[0030] In one possible implementation, one end of the pressing rod has a through groove that mates with the connecting rod.

[0031] When the above technical solution is adopted, the reset component is movably disposed in the housing along the first direction, and the connecting rod can move along the through slot when switching between the display position and the hidden position. The through slot can limit the reset component, thereby reducing the possibility of misalignment of the reset component within the housing.

[0032] Secondly, this application provides a power strip including an overload protection switch as described in any possible implementation of the first aspect.

[0033] The technical effects of the power strip provided in the second aspect can be compared with the technical effects of the overload protection switch provided in the first aspect, and will not be elaborated here. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overload protection switch provided in an embodiment of this application.

[0035] Figure 2 An exploded view of the overload protection switch provided in the embodiments of this application.

[0036] Figure 3 This is a cross-sectional view of the overload protection switch provided in the embodiment of this application when it is in the open state.

[0037] Figure 4 This is a cross-sectional view of the overload protection switch provided in the embodiment of this application when it is in the closed state.

[0038] Figure 5 This is a cross-sectional schematic diagram of the overload protection switch provided in the embodiment of this application when it is in an abnormal working state.

[0039] Figure 6 This is a schematic diagram of the structure of the top cover provided in an embodiment of this application.

[0040] Figure 7 This is a schematic diagram showing the positional relationship between the protrusion, the pressing rod, and the locking element when they are in the closed state.

[0041] Figure 8 This is a schematic diagram of the locking component provided in an embodiment of this application.

[0042] Figure 9 This is a schematic diagram of the pressing rod provided in an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Housing, 11-Top cover, 111-Protrusion, 12-Base, 2-Bimetallic strip, 3-Moving contact, 4-Drive assembly

[0045] 41-Pressing rod, 411-Pressing tooth, 412-Sliding groove, 413-Through groove, 42-Locking element, 421-Locking tooth, 422-Allowing groove.

[0046] 423 - Extension, 43 - Elastic element, 5 - Reset element, 51 - Drive rod, 52 - Display rod, 53 - Connecting rod, 6 - Button

[0047] 61 - Through hole. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 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.

[0052] 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.

[0053] 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).

[0054] First, this application provides a power strip, which is an electrical accessory used to expand power interfaces. It typically has multiple sockets to facilitate simultaneous power supply to multiple devices. The switch included in the power strip is a component that controls the opening and closing of the entire power strip.

[0055] When the switch is in the open position, the current in the circuit containing the power strip is interrupted, and the power strip is in the open state. When the switch is in the closed position, the current in the circuit containing the power strip is connected, and the power strip is in the closed state.

[0056] In practice, the switch is typically an overload protection switch. Thus, when a short circuit or overload occurs in the circuit containing the power strip, the overload protection switch can disconnect the current to the circuit containing the power strip, ensuring electrical safety.

[0057] The power strip also includes terminals to facilitate connection to an external power source.

[0058] Please refer to Figure 1 and Figure 2 As shown in the figure, this application embodiment provides an overload protection switch, which includes a housing 1, a bimetallic strip 2, a moving contact 3, a drive assembly 4, and a reset component 5.

[0059] The structure and dimensions of the housing 1 are not specifically limited here, and shall be subject to the actual situation. In the embodiments provided in this application, the housing 1 may include a top cover 11 and a base 12, such as... Figure 1 , Figures 3 to 5 As shown.

[0060] The top cover 11 and the base 12 can be connected together by welding, screws, or riveting. Of course, this is just an example and is not intended to be a specific limitation.

[0061] In fact, the top cover 11 and the base 12 can also be snapped together. Specifically, one of a matching buckle and a slot can be provided on the top cover 11, and the other of a buckle and a slot can be provided on the base 12. When the buckle and the slot are engaged, the top cover 11 and the base 12 are snapped together.

[0062] The bimetallic strip 2 is disposed inside the housing 1. In a specific implementation, the bimetallic strip 2 is mounted on the base 12.

[0063] The bimetallic strip 2 may include a connecting end, an actuating end, and a contact end. The connecting end can be used for electrical connection with the terminals of a power strip. The actuating end can be used for driving connection with one end of the reset member 5. The contact end can be used for contact with the moving contact 3 to achieve electrical connection between the bimetallic strip 2 and the moving contact 3.

[0064] It should be noted that the bimetallic strip 2 is a mechanical component made of two metals with different coefficients of thermal expansion laminated together, which utilizes the principle of thermal expansion and contraction to achieve deformation when the temperature changes.

[0065] In the embodiments provided in this application, the bimetallic strip 2 has a contact state and a disengaged state. Specifically, when the overload protection switch is in normal operating condition, the current through the bimetallic strip 2 is within the normal range, the temperature of the bimetallic strip 2 will not be too high, and the bimetallic strip 2 will not deform or the deformation will be negligible. Therefore, the bimetallic strip 2 is in the contact state. Please refer to [reference needed]. Figure 3 and Figure 4 As shown. At this time, the bimetallic strip 2 can contact the moving contact 3.

[0066] When an overload protection switch malfunctions, it should be noted that an abnormal operating state refers to a state where an overload or short circuit occurs in the circuit, leading to an increase in current. In this situation, the increased current through bimetallic strip 2 causes its temperature to rise, resulting in deformation. Under these circumstances, bimetallic strip 2 is in a disengaged state, such as... Figure 5 As shown, the bimetallic strip 2 cannot contact the moving contact 3.

[0067] Specifically, such as Figure 3 and Figure 4 As shown, the bimetallic strip 2 is in contact, and the working end of the bimetallic strip 2 is located on the side near the bottom of the base 12, relative to the contact end.

[0068] like Figure 5 As shown, the bimetallic strip 2 is in a disengaged state, and the active end of the bimetallic strip 2 is located on the side away from the bottom of the base 12, compared to the contact end.

[0069] The movable contact 3 is disposed inside the housing 1. In a specific implementation, one end of the movable contact 3 is mounted on the base 12. Specifically, the movable contact 3 can be mounted on the base 12 by welding, riveting, snap-fitting, or screw connection.

[0070] The movable contact 3 has a contact position and a disengagement position relative to the housing 1. In fact, one end of the movable contact 3 is fixedly mounted on the base 12. Under the action of external force, the movable contact 3 can deform, so that the other end of the movable contact 3 has a contact position and a disengagement position relative to the base 12.

[0071] Figure 4 and Figure 5 This indicates that the activated contact 3 is in the contact position. Figure 3 This indicates that the movable contact 3 is in the disengaged position.

[0072] Please combine Figures 3 to 5 As shown, compared to the movable contact 3 in the disengaged position, the other end of the movable contact 3 in the contact position is closer to the bimetallic strip 2.

[0073] When the movable contact 3 is in the contact position, it is used to contact the bimetallic strip 2, which is in the contact state. Please refer to... Figure 4 As shown, at this time, the moving contact 3 is in the contact position, the bimetallic strip 2 is in the contact state, the moving contact 3 is in contact with the bimetallic strip 2, and the overload protection switch provided in this embodiment is in the closed state.

[0074] When the movable contact 3 is in the disengaged position, the movable contact 3 is no longer in contact with the bimetallic strip 2, such as Figure 3 As shown. It should be noted that when the movable contact 3 is in the disengaged position, regardless of whether the bimetallic strip 2 is in the contact state or the disengaged state, the movable contact 3 cannot make contact with the bimetallic strip 2.

[0075] The drive component 4 is disposed on the housing 1. The specific manner in which the drive component 4 is disposed on the housing 1 is not limited here.

[0076] The specific structure of the drive assembly 4 is not limited here. For example, the drive assembly 4 can be a drive cylinder, and the cylinder body of the drive cylinder can be fixedly mounted on the housing 1. Of course, the specific structure of the drive assembly 4 is not limited to this.

[0077] The movable contact 3 is disposed at the driving end of the driving component 4, which drives the movable contact 3 to switch between a disengaged position and a contact position. Under the action of the driving component 4, the movable contact 3 can switch between the disengaged position and the contact position.

[0078] For example, when the drive assembly 4 is a drive cylinder, the movable contact 3 can be disposed at the telescopic end of the drive cylinder. When the telescopic end of the drive cylinder retracts, the movable contact 3 can be in the disengaged position. When the telescopic end of the drive cylinder extends, the movable contact 3 can be in the contact position. During the extension and retraction of the telescopic end of the drive cylinder, the movable contact 3 switches between the contact position and the disengaged position.

[0079] The reset member 5 is movably disposed on the housing 1 along a first direction, which may be parallel to the direction from the base 12 to the upper cover 11. When the reset member 5 moves relative to the housing 1 along the first direction, the reset member 5 has a display position and a hidden position relative to the housing 1.

[0080] When the bimetallic strip 2 is in the disengaged state, the reset member 5 is in the displayed position, with one end of the reset member 5 protruding from the housing 1. When the bimetallic strip 2 is in the contact state, the reset member 5 is in the hidden position, located inside the housing 1.

[0081] In fact, one end of the reset member 5 can make driving contact with the active end of the bimetallic strip 2. When the bimetallic strip 2 is in contact, the end of the reset member 5 that is in contact with the bimetallic strip 2 is located on the side near the bottom of the base 12, the reset member 5 is in a hidden position, and the reset member 5 is located inside the housing 1.

[0082] When an abnormal current occurs in the circuit where the overload protection switch is located, the bimetallic strip 2 deforms, switching from a contact state to a disengaged state, causing the active end of the bimetallic strip 2 to move away from the bottom of the base 12. This, in turn, moves the reset element 5 away from the bottom of the base 12, causing the other end of the reset element 5 to protrude from the housing 1, and the reset element 5 to be in the display position. In other words, during the process of the bimetallic strip 2 switching from the contact state to the disengaged state, the bimetallic strip 2 can drive the reset element 5 to switch from the hidden position to the display position.

[0083] When using the overload protection switch provided in this embodiment, the bimetallic strip 2 is in contact and the reset element 5 is in a hidden position when the overload protection switch is in normal working condition. The operator can drive the moving contact 3 to switch between the contact position and the disengaged position through the drive assembly 4.

[0084] When the moving contact 3 is in the contact position, it contacts the bimetallic strip 2, the current in the circuit of the overload protection switch is connected, and the overload protection switch is in the closed state. When the moving contact 3 is in the disengaged position, it disengages from the bimetallic strip 2, the current in the circuit of the overload protection switch is disconnected, and the overload protection switch is in the open state.

[0085] Therefore, when the overload protection switch is in the closed state and in normal working condition, the bimetallic strip 2 is in the contact state, the reset element 5 is in the hidden position, and the moving contact 3 is in the contact position. At this time, the operator can drive the moving contact 3 from the contact position to the disengagement position through the drive assembly 4, so that the moving contact 3 is disengaged from the bimetallic strip 2, and the overload protection switch switches from the closed state to the open state.

[0086] When the overload protection switch is in the closed state, and an abnormal operating condition such as overload or short circuit occurs in the circuit containing the overload protection switch, the bimetallic strip 2 switches from the contact state to the disengaged state. During the switching process, the bimetallic strip 2 drives the reset element 5 to switch from the hidden position to the display position. When the reset element 5 is in the display position, one end of the reset element 5 protrudes from the housing 1. At the same time, the current in the circuit containing the overload protection switch is disconnected, and the overload protection switch is in the open state. At this time, the operator can observe that the reason why the overload protection switch is in the open state is because of the abnormal operating condition of the circuit containing the overload protection switch by observing that one end of the reset element 5 protrudes from the housing 1.

[0087] Accordingly, operators can more easily distinguish whether the power strip is disconnected due to an abnormal working state of the circuit in which it is located, or due to operator operation.

[0088] Additionally, it should be noted that when the overload protection switch is in the open state due to an abnormal operating state of its circuit, the moving contact 3 remains in the contact position. At this time, the operator can press the reset element 5, causing it to drive the active end of the bimetallic strip 2 towards the bottom of the base 12. Simultaneously, the contact end of the bimetallic strip 2 moves away from the bottom of the base 12, thus switching the bimetallic strip 2 from the disengaged state to the contact state until the moving contact 3 contacts the bimetallic strip 2, the circuit current of the overload protection switch is connected, and the overload protection switch is in the closed state.

[0089] In one possible implementation, such as Figure 6 As shown, the housing 1 is provided with a through hole extending along a first direction. The through hole can be a cylindrical hole, and the diameter of the through hole is not limited here, but depends on the actual situation.

[0090] like Figure 3 and Figure 6 As shown, the wall of the through hole is provided with a plurality of protrusions 111 extending in the first direction, and the plurality of protrusions 111 are evenly distributed along the circumference of the through hole.

[0091] In specific implementations, the number of protrusions 111 can be two, three, or more. In the embodiment provided in this application, the number of protrusions 111 is four. The protrusions 111 extend along a first direction, and the structure of the protrusions 111 can be elongated.

[0092] In fact, the protrusion 111 is provided on the upper cover 11. The protrusion 111 can be provided on the upper cover 11 by means of welding, snap-fit, or screw connection. Of course, the protrusion 111 can also be integrally formed with the upper cover 11. The forming method of the protrusion 111 is not specifically limited here, and the actual situation shall prevail.

[0093] Please combine Figures 2 to 4 As shown, the driving assembly 4 provided in this embodiment includes a pressing rod 41, a locking member 42, and an elastic member 43. The pressing rod 41 is slidably sleeved in the through hole. In fact, a limiting part is provided on the inner wall of the end of the through hole away from the base 12 to limit the pressing rod 41 in the first direction, so as to prevent the pressing rod 41 from coming off from the end of the upper cover 11 away from the base 12.

[0094] The pressing rod 41 includes a plurality of pressing teeth 411, which are evenly distributed along the circumference of the pressing rod 41. The pressing teeth 411 may be located at one end of the pressing rod 41 near the base 12. A sliding groove 412 is formed between two adjacent pressing teeth 411, and the sliding groove 412 corresponds to the protrusion 111.

[0095] The number of pressing teeth 411 is the same as the number of protrusions 111, and the number of sliding grooves 412 is the same as the number of protrusions 111 and corresponds one-to-one. The protrusions 111 are located in the sliding grooves 412, and when the pressing rod 41 slides along the through hole, the pressing rod 41 can slide along the length extension direction of the protrusions 111.

[0096] The locking member 42 is slidably fitted into the through hole. The locking member 42 includes a plurality of locking teeth 421 for engaging with the pressing teeth 411. The plurality of locking teeth 421 are evenly distributed along the circumference of the locking member 42. A clearance groove 422 is formed between two adjacent locking teeth 421. The number of locking teeth 421 is the same as the number of pressing teeth 411, and they correspond one-to-one.

[0097] The locking member 42 has a released position and a limited position relative to the housing 1. When the locking member 42 is in the released position, the protrusion 111 corresponds to the relief groove 422, the pressing tooth 411 engages with the locking tooth 421, and the moving contact piece 3 is in the disengaged position.

[0098] Please combine Figure 4 , Figure 5 and Figure 7 As shown, when the locking member 42 is in the limited position, the protrusion 111 abuts against the bottom of the tooth groove of the locking tooth 421, and the moving contact piece 3 is in the contact position.

[0099] The two ends of the elastic element 43 act elastically on the moving contact 3 and the locking element 42 respectively. The elastic element 43 is used to apply a force to the moving contact 3 to switch from the disengaged position to the contact position.

[0100] Thus, when the overload protection switch is closed, the moving contact 3 is in the contact position, and the end of the protrusion 111 near the base 12 abuts against the corresponding locking tooth 421. In fact, the end of the protrusion 111 near the base 12 abuts against the bottom of the tooth groove of the corresponding locking tooth 421. When the operator drives the pressing rod 41 to move towards the bottom of the base 12, the end of the pressing tooth 411 near the base 12 contacts the corresponding locking tooth 421.

[0101] As the pressing rod 41 is further driven, the pressing tooth 411 contacts the groove wall of the corresponding locking tooth 421, and the protrusion 111 disengages from the corresponding locking tooth 421. The elastic member 43 is further compressed, and under the action of the pressing tooth 411 and the locking tooth 421, it can drive the locking member 42 to move towards the bottom of the housing 1 while rotating, so that the protrusion 111 corresponds to the relief groove 422. The protrusion 111 is located in the relief groove 422, the pressing tooth 411 and the locking tooth 421 mesh, and the moving contact 3 is in the disengaged position. Thus, the overload protection switch switches from the closed state to the open state.

[0102] In this case, when the operator drives the pressing rod 41 to move towards the bottom of the base 12, the elastic element 43 is compressed. Under the action of the pressing tooth 411 and the locking tooth 421, the locking element 42 can be driven to move towards the bottom of the housing 1 and rotate, so that the protrusion 111 abuts against the bottom of the tooth groove of the locking tooth 421, and the moving contact 3 is in the contact position, thereby switching the overload protection switch from the open state to the closed state.

[0103] It should be noted that the driving component 4 provided in this application embodiment for driving the movable contact 3 to switch between the contact position and the disengagement position can be understood as similar to the automatic telescopic locking mechanism of a ballpoint pen in the prior art.

[0104] In some embodiments, the pressing rod 41 has a hollow structure. For example... Figure 8 As shown, the locking member 42 provided in this embodiment of the application also includes an extension 423. Please refer to... Figures 3 to 5 as well as Figure 8 As shown, in a specific implementation, the extension 423 is slidably sleeved inside the pressing rod 41. The locking tooth 421 is located outside the pressing rod 41, and the locking tooth 421 is located on the side of the pressing tooth 411 near the bottom of the base 12.

[0105] This improves the fit between the pressing rod 41 and the locking member 42, and enhances the stability and accuracy of the drive assembly 4 in switching the moving contact 3 between the contact position and the disengagement position.

[0106] In practical operation, the elastic element 43 can be an elastic sheet. In the embodiments provided in this application, the elastic element 43 is a spring.

[0107] At this point, the spring can store energy through elastic deformation and release it when it recovers its shape, resulting in high energy conversion efficiency. The spring also exhibits excellent impact resistance and fatigue resistance, leading to a long service life.

[0108] As one possible implementation, the overload protection switch provided in this embodiment of the application also includes a button 6, please refer to... Figures 1 to 5 As shown, button 6 is movably mounted on the pressing rod 41, and the pressing surface of button 6 is located outside the housing 1.

[0109] Thus, the operator can operate the pressing lever 41 via button 6 to control the drive assembly 4 to switch the moving contact 3 between the contact position and the disengagement position. The setting of button 6 can improve operating efficiency and safety, and meet the operator's experience needs.

[0110] In practice, button 6 and pressing rod 41 can be connected together by welding, snap-fitting, or screw connection. Of course, this is just an example and is not intended to be a specific limitation.

[0111] In addition, when the pressing rod 41 is a hollow structure, an insertion part can be provided on the button 6, and the insertion part can be inserted into the pressing rod 41 with an interference fit.

[0112] In some embodiments, the button 6 is provided with a through hole 61 corresponding to one end of the reset member 5. When the reset member 5 is in the display position, one end of the reset member 5 can pass through the through hole 61 and protrude from the pressing surface.

[0113] In this situation, the operator can more intuitively observe the position of the reset component 5 to determine whether the overload protection switch is in an abnormal working state.

[0114] Furthermore, on a plane perpendicular to the first direction, the orthographic projection of the reset member 5 lies within the orthographic projection of the pressing surface, indicating that the pressing surface has a large area, making it easier for operators to handle.

[0115] As one possible approach, please combine Figures 3 to 5 As shown, the reset component 5 includes a drive rod 51, a connecting rod 53, and a display rod 52. Both ends of the connecting rod 53 are connected to the drive rod 51 and the display rod 52, respectively. The end of the drive rod 51 furthest from the connecting rod 53 is used for driving contact with the bimetallic strip 2. The display rod 52 is collinear with the axis of the pressing rod 41, and one end of the display rod 52 can slidably extend into the pressing rod 41 and the locking component 42.

[0116] Thus, the display lever 52 can limit the pressing lever 41 and the locking member 42, ensuring that the axes of the pressing lever 41 and the locking member 42 are collinear, improving the fit between the pressing lever 41 and the locking member 42, and enhancing the stability and accuracy of the drive assembly 4 in driving the moving contact 3 to switch between the contact position and the disengagement position.

[0117] In practice, the display rod 52 extends along the first direction, and its middle portion can be connected to one end of the connecting rod 53. The end of the display rod 52 furthest from the base 12 corresponds to the through hole 61, allowing it to pass through the through hole 61 and protrude from the pressing surface. The end of the display rod 52 closest to the base 12 can slidably extend into the pressing rod 41 and the locking member 42.

[0118] The drive rod 51 can extend in a first direction. One end of the drive rod 51 is connected to the connecting rod 53, and the end of the drive rod 51 away from the connecting rod 53 is used to drive the bimetallic strip 2 into contact.

[0119] In practice, the drive rod 51 can be welded to the connecting rod 53, and the connecting rod 53 can also be welded to the display rod 52. Of course, this is just an example and is not intended to be a specific limitation.

[0120] As an optional approach, please combine Figures 3 to 5 and Figure 9 As shown, one end of the pressing rod 41 has a through groove 413 that cooperates with the connecting rod 53.

[0121] Thus, when the reset member 5 is movably disposed in the housing 1 along the first direction, and switches between the display position and the hidden position, the connecting rod 53 can move along the through groove 413. The through groove 413 can limit the reset member 5, thereby reducing the possibility of misalignment of the reset member 5 within the housing 1.

[0122] 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 secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; 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 according to the specific circumstances.

Claims

1. An overload protection switch, characterized in that, include: case; A bimetallic strip is disposed within the housing; The bimetallic strip has a contact state and a detached state; When the overload protection switch is in normal working condition, the bimetallic strip is in the contact state; When the overload protection switch malfunctions, the bimetallic strip is in the disengaged state. A movable contact piece is disposed within the housing; A driving component is disposed in the housing; the movable contact is disposed at the driving end of the driving component; A reset element is movably disposed in the housing along a first direction; The reset element is used to make driving contact with the bimetallic strip; The reset component has a visible position and a hidden position relative to the housing; When the bimetallic strip is in the disengaged state, the reset member is in the display position, and one end of the reset member protrudes from the housing; When the bimetallic strip is in the contact state, the reset member is in the hidden position, and the reset member is located inside the housing.

2. The overload protection switch according to claim 1, characterized in that, The housing has a through hole extending along the first direction, and the wall of the through hole has a plurality of protrusions extending along the first direction, the plurality of protrusions being evenly distributed circumferentially along the through hole; the driving assembly includes: The pressing rod is slidably sleeved in the through hole; the pressing rod includes a plurality of pressing teeth, which are evenly distributed along the circumference of the pressing rod; a sliding groove is formed between two adjacent pressing teeth, and the sliding groove corresponds to the protrusion; A locking member is slidably fitted into the through hole; the locking member includes a plurality of locking teeth for engaging with the pressing teeth, the plurality of locking teeth being evenly distributed along the circumference of the locking member; a clearance groove is formed between two adjacent locking teeth; the locking member has a release position and a limit position relative to the housing; when the locking member is in the release position, the protrusion corresponds to the clearance groove, and the pressing teeth engage with the locking teeth; when the locking member is in the limit position, the protrusion abuts against the locking teeth; An elastic element, the two ends of which elastically act on the moving contact piece and the locking element, respectively.

3. The overload protection switch according to claim 2, characterized in that, The pressing rod has a hollow structure; the locking member also includes an extension, which is slidably sleeved inside the pressing rod.

4. The overload protection switch according to claim 2, characterized in that, The number of protrusions is four.

5. The overload protection switch according to claim 2, characterized in that, The overload protection switch also includes a button that is movably disposed on the pressing rod, with the pressing surface of the button located outside the housing.

6. The overload protection switch according to claim 5, characterized in that, The button is provided with a through hole corresponding to one end of the reset member; when the reset member is in the display position, one end of the reset member can pass through the through hole and protrude from the pressing surface.

7. The overload protection switch according to any one of claims 2 to 6, characterized in that, The reset component includes a drive rod, a connecting rod, and a display rod. The two ends of the connecting rod are connected to the drive rod and the display rod, respectively. The end of the drive rod away from the connecting rod is used to make driving contact with the bimetallic strip.

8. The overload protection switch according to claim 7, characterized in that, The display rod and the pressing rod are collinear, and one end of the display rod can slidably extend into the pressing rod and the locking member.

9. The overload protection switch according to claim 7, characterized in that, One end of the pressing rod has a through groove that mates with the connecting rod.

10. A power strip, characterized in that, Including the overload protection switch as described in any one of claims 1 to 9.

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