Double-reset overload protection button switch and socket having the same

Abstract

The utility model discloses a kind of overload protection button switch of double reset and socket with it, comprising: shell assembly, pressing assembly and conducting sheet assembly;Conducting sheet assembly includes: moving contact and bimetallic sheet, and extension edge formed on bimetallic sheet, extension edge one end is equipped with the static contact point of setting relative to moving contact, extension edge other end is equipped with reset part;Pressing assembly is actuated moving contact by pressing, to make moving contact and static contact point contact, and moving contact separates from static contact point when pressing assembly resets;Extension edge is set to bend under overload condition, to make static contact point move away from moving contact action and separate from moving contact;It further includes reset lever, reset lever has operating part and reset part, reset lever exposes operating part under assembly environment, and operating part is set close to the upper end surface of pressing assembly, reset part is set to bimetallic sheet, and reset part is pressed under overload condition by operating part and is reset to initial state by bimetallic sheet.

Description

Technical Field

[0001] This utility model relates to the field of push button switch technology, specifically to a double reset overload protection push button switch and a socket having the same. Background Technology

[0002] Currently, most power strips and sockets on the market are equipped with push-button switches to control the circuit on / off of the corresponding sockets. When the push-button switch is pressed in the initial position, the internal ratchet structure keeps the pressed position, and the internal conductive plates are electrically connected, thus turning on the power. When it is necessary to turn off the power, the push-button switch is pressed further in the pressed position, and the ratchet structure is lifted by the spring. At this time, the push-button switch returns to the initial position, and the conductive plates are disconnected from each other, thus turning off the power.

[0003] In addition to the above, overload protection should also be installed on power strips and sockets to further reduce safety hazards.

[0004] An existing push-button switch with overload protection uses a bimetallic strip inside that can bend under overload conditions to achieve overload protection. It also includes a separate reset button, which is usually hidden inside the socket or power strip housing. Under overload conditions, the reset button can only be activated by pressing the push-button switch again. This approach limits the user's ability to determine whether the socket or power strip is currently under overload protection, and also restricts the user's ability to operate the reset button independently. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double reset overload protection push button switch.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a double reset overload protection push button switch, comprising: a housing assembly, a pressing assembly movably disposed on the housing assembly, and a conductive sheet assembly disposed within the housing assembly;

[0007] The conductive sheet assembly includes:

[0008] The movable contact piece is disposed relative to the pressing component;

[0009] A bimetallic strip and an extension edge formed on the bimetallic strip, one end of the extension edge having a stationary contact point disposed relative to the moving contact piece, and the other end of the extension edge having a reset part;

[0010] The pressing component actuates the movable contact piece by pressing, so that the movable contact piece contacts the stationary contact point, and the movable contact piece separates from the stationary contact point when the pressing component resets;

[0011] The extended edge is configured to bend under overload conditions so that the stationary contact moves away from the moving contact and separates from the moving contact.

[0012] It also includes a reset rod, which has an operating part and a reset part. The operating part is exposed in the assembly environment, and the operating part is located near the upper end face of the pressing component. The reset part is located towards the bimetallic strip, and the operating part receives the actuating force to push the bimetallic strip back to its initial state under overload conditions.

[0013] Furthermore, the reset rod is driven to the pressing assembly, and the reset part actuates the lifting part to reset the bimetallic strip.

[0014] Furthermore, an elastic element is provided between the reset rod and the pressing assembly. The elastic element acts on the reset rod and restricts the axial movement of the reset rod.

[0015] Furthermore, the housing assembly includes an upper housing and a lower housing that are spliced ​​together to form a cavity;

[0016] The reset rod also includes a support portion, which is offset from the operating portion on the support portion. The upper housing is provided with a receiving groove for accommodating the support portion. The reset portion passes through the housing assembly, and the operating portion passes through the pressing assembly.

[0017] Furthermore, the housing assembly is provided with a positioning component, which is arranged as a seat and is spaced apart from the conductive sheet assembly and cooperates with the housing assembly to constrain the conductive sheet assembly within the housing assembly.

[0018] Furthermore, the positioning component includes a first insulating seat, which separates the movable contact piece from the bimetallic strip. The first insulating seat is provided with a first groove for accommodating the movable contact piece and a second groove for accommodating the bimetallic strip. The first groove and the second groove are offset from each other, and the opening directions of the first groove and the second groove are opposite to each other.

[0019] Furthermore, the conductive sheet assembly also includes a first stationary contact extending on the bimetallic sheet, and the upper housing is provided with a seat that cooperates with the moving contact, the first insulating seat, and the first stationary contact;

[0020] The moving contact, the first insulating seat, and the first stationary contact are sequentially pressed together in the direction of the seat opening of the upper housing through a concave-convex structure, and the lower housing is fitted with the upper housing and abuts against the first stationary contact and the first insulating seat to constrain the relative position of the conductive sheet assembly on the housing assembly.

[0021] Furthermore, the conductive sheet assembly also includes a second stationary contact sheet, and the positioning assembly also includes a second insulating base;

[0022] The upper housing is provided with a seat for accommodating the second stationary contact and the second insulating seat. The second stationary contact and the second insulating seat are sequentially pressed together in the opening direction of the seat of the upper housing through a concave-convex structure. The lower housing cooperates with the upper housing and abuts against the first stationary contact and the first insulating seat to constrain the relative position of the conductive sheet assembly on the housing assembly.

[0023] Furthermore, the housing assembly includes an upper housing and a lower housing. The adjacent end faces of the upper housing and the lower housing are provided with oppositely arranged latching claws and slots. The upper housing and the lower housing are provided with oppositely arranged openings in the actuation direction of the pressing component. The upper housing and the lower housing are interlocked and press the conductive sheet assembly and the positioning component. Through the above improvements, the upper housing and the lower housing are oppositely opened in the vertical direction of the pressing component, so that the conductive sheet assembly and the positioning component can be installed sequentially in the opening direction of the upper housing. After the installation is completed, the lower housing can be directly fastened to the upper housing.

[0024] This utility model also provides a socket, including the above-mentioned double reset overload protection button switch, including a socket housing, the socket housing having a first opening and a second opening, the first opening being for the upper end of the pressing component to be exposed, and the second opening being for the operating end of the reset rod to be exposed;

[0025] In the initial state, the reset rod is retracted into the first opening. In the overload state, the bimetallic strip is raised and lifts the reset rod so that the operating part is close to, flush with, or extends out of the first opening.

[0026] or,

[0027] In its initial state, the reset rod is flush with the first opening. In an overload state, the bimetallic strip tilts up and lifts the reset rod, so that the operating part and the first opening extend out of the first opening.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects: The push button switch of the present invention, by setting a bimetallic strip inside, can achieve bending away from the moving contact under overload conditions, so as to separate the stationary contact from the moving contact. The reset part located at the far end of the stationary contact bends towards the pressing component, preparing to be pressed and reset by the reset pressing action of the pressing component, thereby realizing the overload protection function of the push button switch.

[0029] Furthermore, the reset rod of this invention is normally positioned close to the pressing assembly, and the operating part of the reset rod is exposed from the assembly environment. When the bimetallic strip tilts due to overload, the reset rod receives the force and tilts further, thus serving as an indication of the overload state. This allows the user to directly actuate the reset rod. When the reset rod is connected to the pressing assembly, the user can also actuate the reset rod through the pressing action of the pressing assembly, thereby achieving a dual reset function. That is, the user can operate the reset rod independently or through the pressing assembly to achieve the reset of the bimetallic strip after overload. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0032] Figure 3 This is a cross-sectional view of the reset part of the reset rod of this utility model;

[0033] Figure 4 This is a cross-sectional view of the operating part of the reset rod of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the inverted upper shell, conductive sheet assembly, and positioning assembly of this utility model;

[0035] Figure 6 This is an exploded view of the inverted upper shell, conductive sheet assembly, and positioning assembly of this utility model.

[0036] Figure 7 This is a schematic diagram of the structure of the present invention, showing the placement of a moving contact piece and a second stationary contact piece on the upper housing.

[0037] Figure 8 This is a schematic diagram of the structure of the present invention, showing the placement of the first insulating seat and the second insulating seat on the upper shell.

[0038] Figure 9 This is a schematic diagram of the structure of the present invention, in which a bimetallic sheet and a first stationary contact sheet are placed on the upper shell.

[0039] Figure 10 This is an exploded view of the bimetallic strip, the first insulating seat, and the moving contact piece of this utility model on the upper shell;

[0040] Figure 11 This is an exploded schematic diagram of the bimetallic strip, the first insulating base, and the moving contact of this utility model;

[0041] Figure 12 This is an exploded view of the second stationary contact and the second insulating seat of this utility model on the upper housing;

[0042] Figure 13 This is an exploded view of the conductive sheet assembly, moving contact sheet, and positioning assembly of this utility model;

[0043] Figure 14 for Figure 3 Enlarged view of point A in the middle;

[0044] Figure 15 for Figure 3 Enlarged view of point B in the middle;

[0045] Figure 16 for Figure 4 Enlarged view of point C in the middle;

[0046] Figure 17 for Figure 4 Enlarged view at point D;

[0047] Figure 18 This is a schematic diagram of the push button switch of this utility model inside the socket;

[0048] In the diagram: 1. Housing assembly; 1.1. Upper housing; 1.11. Receiving groove; 1.111. Stepped section; 1.112. Groove; 1.113. Guide seat; 1.12. First seat; 1.121. First groove; 1.13. Second seat; 1.131. Second groove; 1.132. Second protrusion; 1.14. First pressure port; 1.15. Second pressure port; 1.16. Third seat; 1.17. Fourth seat; 1.18. Third pressure port; 1.19. Fourth pressure port; 1.191. Fifth recess; 1.2. Lower housing; 1.21. Pressing rib; 1.3. Claw; 1.4. Claw groove; 1.5. Limiting post; 1.51. Limiting protrusion; 2. Pressing assembly; 2 1. Pressing bracket; 2.2. Through port; 3. Moving contact piece; 3.1. Elastic part; 3.2. Fixing part; 3.21. First protrusion; 3.22. First extension part; 4. Bimetallic strip; 4.1. Extension edge; 4.2. Stationary contact point; 4.3. Lifting part; 5. Reset rod; 5.1. Operating part; 5.2. Reset part; 5.3. Support part; 6. Elastic element; 7. First insulating seat; 7.1. First groove; 7.2. Second groove; 7.21. Adaptor surface; 7.3. Corner part; 7.4. First recess; 7.5. First pressing part; 7.6. Third protrusion; 8. First stationary contact piece; 8.1. Second recess; 8.2. Third recess; 9. Second stationary contact piece; 9.1. Fourth recess; 10. Second insulating base; 10.1. Fourth protrusion; 10.2. Second pressing part; 11. Socket; 11.1. First opening; 11.2. Second opening; 12. Ratchet structure; 13. Actuating spring; 14. Lamp panel assembly; 15. Conductive spring; Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0051] like Figure 1-17 As shown, a double-reset overload protection push button switch includes: a housing assembly 1, a push button assembly movably disposed on the housing assembly 1, and a conductive sheet assembly disposed within the housing assembly 1;

[0052] The conductive sheet assembly includes:

[0053] Movable contact 3 is positioned relative to pressing component 2;

[0054] Bimetallic strip 4, and an extension edge 4.1 formed on the bimetallic strip 4, one end of the extension edge 4.1 is provided with a stationary contact point 4.2 disposed relative to the moving contact piece 3, and the other end of the extension edge 4.1 is provided with a raised portion 4.3;

[0055] The pressing component 2 actuates the movable contact 3 by pressing, so that the movable contact 3 contacts the stationary contact 4.2, and the movable contact 3 separates from the stationary contact 4.2 when the pressing component 2 resets;

[0056] The extension edge 4.1 is configured to bend under overload conditions so that the stationary contact 4.2 moves away from the moving contact 3 and separates from the moving contact 3; and the raised portion 4.3 moves in the direction of bending along the extension edge 4.1 and moving closer to the pressing assembly 2.

[0057] To achieve the reset of the bimetallic strip 4 under the overload condition of bending protection, a reset rod 5 is also included. The reset rod 5 has an operating part 5.1 and a reset part 5.2. The operating part 5.1 can be actuated by an external force, thereby transmitting the actuating force to the reset part 5.2. The operating part 5.1 is exposed in the assembly environment of the reset rod 5, and the operating part 5.1 is set close to the upper end surface of the button assembly. The reset part 5.2 is set facing the bimetallic strip 4, and the operating part 5.1 receives the actuating force to push the bimetallic strip 4 back to the initial state under the overload condition.

[0058] Specifically, the reset part 5.2 on the reset rod 5 is arranged toward the tilted position of the bimetallic strip 4 after overload, so that the pressing action of the reset rod 5 can actuate the bimetallic strip 4 and reset the bimetallic strip 4. Preferably, it is arranged directly opposite the tilted part 4.3 of the bimetallic strip 4.

[0059] It should be noted that the assembly environment refers to the assembly environment of the reset lever 5 on the push button switch, or it can refer to the assembly environment in which the push button switch is located. The purpose is to expose the reset lever 5 so that it can be operated by the user. In addition, the reset lever 5 also forms a transmission with the pressing component 2, so that when the pressing component 2 is pressed, the pressing component 2 can act on the reset lever 5, thereby forming a double reset function. That is, the user can operate the reset lever 5 alone, or operate the reset lever 5 through the pressing component 2, so as to realize the reset of the bimetallic strip 4 after overload.

[0060] (Bimetallic strip 4)

[0061] The bimetallic strip 4 can be composed of two metal sheets with different coefficients of thermal expansion. When the ambient temperature changes, the two metal sheets expand or contract due to the temperature change, causing the bimetallic strip 4 to bend and deform. When the temperature rises, the deformation of the metal sheet with a larger coefficient of thermal expansion is greater than that of the metal sheet with a smaller coefficient of thermal expansion. The metal sheet with a larger coefficient of thermal expansion can compress the metal sheet with a smaller coefficient of thermal expansion, causing them to bend simultaneously. In this invention, at least the extension edge 4.1 deforms, so that when overloaded, the bimetallic strip 4 heats up due to excessive current and bends. The stationary contact 4.2 at the end of the extension edge 4.1 deforms and bends away from the moving contact 3, thereby achieving the overload power-off protection function. The raised portion 4.3 located on the extension edge 4.1 away from the stationary contact 4.2 bends in the opposite direction to the bending direction of the stationary contact 4.2. For example, the stationary contact 4.2 bends downward to separate from the moving contact 3 above, while the raised portion 4.3 bends upward, ready to be reset by the pressing force.

[0062] As a further explanation of the extension edge 4.1, under overload conditions, the stationary contact 4.2 on the extension edge 4.1 bends downward, while the raised portion 4.3 on the extension edge 4.1 bends upward, causing the raised portion 4.3 to move toward the pressing component 2 so that it can be pressed and actuated, thereby causing the extension edge 4.1 to return to its initial position. This initial position specifically refers to the position where, under normal conditions, the moving contact 3 can be pressed by the pressing action of the pressing component 2 and come into contact with the stationary contact 4.2.

[0063] In other embodiments, the extension edge 4.1 has an upward tilted posture from the tilted portion 4.3, thereby providing space for the stationary contact 4.2 to bend downward under overload conditions.

[0064] like Figure 2As shown, the free end of the moving contact 3 is located directly above the stationary contact 42 on the extension side 4.1, while the raised portion 4.3 on the extension side 4.1 is far from the free end of the moving contact 3, so that the reset rod 5 can be far away from the ratchet structure 12 of the pressing assembly 2 and the position of the mating axis of the moving contact 3 and the stationary contact 4.2, effectively avoiding assembly interference.

[0065] (Reset lever 5)

[0066] like Figures 1 to 4 As shown, in one arrangement of the reset rod 5, the reset rod 5 is connected to the pressing component 2, so that the pressing action of the pressing component 2 can drive the reset rod 5 downward, so that the reset rod 5 can contact the raised part 4.3 during the downward stroke, and realize the reset pressing action of the raised part 4.3.

[0067] Meanwhile, the reset rod 5 is also exposed outside the assembly environment for user actuation. When reset is required, the reset rod 5 is driven by the pressing component 2 to move together, or is directly actuated, thereby pressing against the bent and upturned part 4.3, driving the upturned part 4.3 to bend downwards and reset, thereby causing the stationary contact 4.2 at the other end to deform upwards and reset. At this time, the pressing component 2 completes the reset action, and the moving contact 3 loses the pressure of the pressing component 2 and separates from the stationary contact 4.2, and is in a de-energized state.

[0068] Further reference Figure 3 and Figure 4 As a further embodiment of the reset lever 5, an elastic element 6 is provided between the reset lever 5 and the button assembly. The elastic element 6 acts on the reset lever 5 and applies an axial force to the reset lever 5, thereby limiting the axial movement of the reset lever 5 and stabilizing the relative position of the reset lever 5 on the housing assembly 1. Specifically, the reset lever 5 is abutted against the housing assembly 1. In the overload state, the reset lever 5 is set to be able to rise by the lifting action of the bimetallic strip 4. At this time, the bimetallic strip 4 needs to overcome the force of the elastic element 6 on the reset lever 5 in the overload state and further expose the reset lever 5. On the one hand, the rising of the reset lever 5 provides a pressing stroke for it, and on the other hand, it reminds the user that the current overload protection state is in effect.

[0069] Preferably, the reset part 5.2 of the reset rod 5 is located at the bottom, and a gap is reserved between it and the raised part 4.3 of the bimetallic strip 4, thereby reducing the force required to overcome the elastic member 6. Of course, in some embodiments, the reset rod 5 can also be abutted against the bimetallic strip 4 in the normal state.

[0070] Specifically, the elastic element 6 refers to a spring, the reset rod 5 is a shaft-like part, and the spring is sleeved on the reset rod 5, preferably on the operating part 5.1. The elastic element 6 can also be other elastic components, as long as an elastic force is applied to the reset rod 5.

[0071] The housing assembly 1 includes an upper housing 1.1 and a lower housing 1.2 that are spliced ​​together to form a cavity; the reset rod 5 is supported on the upper housing 1.1; the operating part 5.1 passes through the pressing assembly 2; the reset part 5.2 extends into the cavity to act on the bimetallic strip 4; the elastic member 6 is specifically abutted between the reset rod 5 and the pressing assembly 2, so that the elastic member 6 plays a transmission role between the reset rod 5 and the pressing assembly 2, that is, the pressing assembly 2 actuates the reset rod 5 through the elastic member 6.

[0072] like Figure 4 As shown, the reset rod 5 also includes a support portion 5.3. The reset portion 5.2 is offset from the operating portion 5.1 on the support portion 5.3. The upper housing 1.1 is provided with a receiving groove 1.11 for accommodating the support portion 5.3, and the elastic element 6 specifically acts on the support portion 5.3. The offset support portion 5.3 provides an operating position for the elastic element 6 and keeps the axially extending reset portion 5.2 away from the functional part of the pressing assembly 2. This functional part specifically refers to the lamp plate assembly 14 and the conductive spring 15 in the pressing assembly 2. The position of the reset rod 5 is optimized to reduce its lateral space occupation and prevent it from being too close to the assembly area of ​​the upper housing 1.1 for functional components. This reduces the assembly difficulty of the elastic element 6 and the reset rod 5. Furthermore, thanks to the position of the reset rod 5 corresponding to the lifting part 4.3, the assembly of the reset rod 5 can be avoided inside the housing assembly 1 and near the position of the moving contact 3 and the stationary contact 4.2. The reset rod 5 can simply be placed into the receiving groove 1.11 and then fitted with the pressing assembly 2, so that the operating part 5.1 passes through the pressing assembly 2.

[0073] like Figure 16 As shown, in this embodiment, an additional groove 1.11 is provided on the upper housing 1.1 to accommodate the support part 5.3, reduce the exposure of the support part 5.3 on the upper housing 1.1, and prevent interference with the assembly of the button switch body. At the same time, it makes the support part 5.3 further away from the pressing component 2, thereby increasing the setting length of the spring and avoiding the spring being too short, which would affect the lifting action of the bimetallic strip 4 to drive the reset rod 5 when overloaded.

[0074] Of course, in some embodiments, if the assembly space allows, the receiving groove 1.11 can be omitted, and the support 5.3 can be directly mounted on the upper housing 1.1. At the same time, if the height space allows, the length of the spring can be increased.

[0075] Further reference Figure 16As shown, regarding the position of the spring acting on the reset lever 5, the pressing assembly 2 includes a pressing bracket 2.1. The pressing bracket 2.1 is provided with a through-hole 2.2 for the operating part 5.1 to pass through. The upper end of the spring abuts against the periphery of the through-hole 2.2. A stepped portion 1.111 is formed at the upper end of the receiving groove 1.11. The support portion 5.3 is provided with a groove 1.112 flush with the stepped portion 1.111, so that the lower end of the spring acts on the fixed stepped portion 1.111 and the groove 1.112 of the support portion 5.3. The operating part 5.1 is specifically located on the outside of the cavity away from the housing assembly 1. Therefore, in the overload state, the lifting action of the bimetallic strip 4 acts on the spring through the groove 1.112 on the support portion 5.3, achieving a biasing effect on the spring, which helps to overcome the spring and actuate the reset lever 5 to rise, thereby improving the reliability of the overload protection of the button switch.

[0076] Specifically, the housing assembly 1 is provided with a guide seat 1.113 for the reset part 5.2 to pass through it. The guide seat 1.113 provides guidance for the reset rod 5 in the vertical direction, thereby improving the smoothness and stability of the reset rod 5's movement.

[0077] In other embodiments, the reset rod 5 is driven to the pressing assembly 2, and the reset part actuates the lifting part to reset the bimetallic strip. The reset rod can be used as an intermediate transmission element to cooperate with the pressing assembly, or the reset rod can be directly cooperated with the pressing assembly. For example, a radial transmission part is provided on the reset rod. The radial transmission part is abutted by the pressing assembly during the pressing process, and is thus driven downward by the pressing assembly, thereby enabling the reset part to actuate the lifting part.

[0078] (Positioning component)

[0079] like Figure 11 and Figure 13 As shown, as a further embodiment of the conductive sheet assembly, the conductive sheet assembly also includes a first stationary contact 8 fixedly disposed with the bimetallic strip 4, and a second stationary contact 9 disposed corresponding to the raised portion 4.3 of the bimetallic strip 4. The first stationary contact 8 and the fixed portion 3.2 of the moving contact 3 are disposed corresponding to the fixed portion 3.2 of the bimetallic strip 4. The second stationary contact 9 is spaced apart from the bimetallic strip 4. A positioning component is provided inside the housing assembly 1. The positioning component is disposed as a seat and is spaced apart from the conductive sheet assembly, thereby avoiding contact between adjacent conductive sheets. The positioning component cooperates with the housing assembly 1 to constrain the conductive sheet assembly inside the housing assembly 1, eliminate the movement gap of the conductive sheet assembly inside the housing assembly 1, and thus stabilize the position of the conductive sheet assembly inside the housing assembly 1.

[0080] like Figure 11As shown, specifically, the positioning component includes a first insulating base 7, which separates the movable contact 3 from the bimetallic strip 4. The first insulating base 7 has a first groove 7.1 for accommodating the movable contact 3 and a second groove 7.2 for accommodating the bimetallic strip 4. The first groove 7.1 and the second groove 7.2 are staggered, and their opening directions are opposite to each other. Through these improvements, the first insulating base 7 achieves insulation separation between the movable contact 3 and the first stationary contact 8 and the bimetallic strip 4, and provides independent and distinct installation spaces for each.

[0081] In this design, the first insulating base 7 is vertically spaced from the fixing portion 3.2 of the moving contact 3 and the first stationary contact 8. The first groove 7.1 and the second groove 7.2 are diagonally arranged in the length and width directions of the housing assembly 1, respectively. That is, the first groove 7.1 and the second groove 7.2 form a semi-enclosed structure on the first insulating base 7, which can be specifically selected as an L-shaped enclosure. The first groove 7.1 has a stepped baffle at the end of the fixing portion of the moving contact to provide a limit for the insertion of the moving contact. The second groove has another baffle at the end of the first stationary contact to provide a limit for the insertion of the first stationary contact. The two baffles are located at both ends of the first insulating base in the width direction and further separate the moving contact and the first stationary contact.

[0082] Specifically, the first stationary contact 8 at least partially overlaps with the bimetallic strip 4, and the end of the first stationary contact 8 extends out of the housing assembly 1 so that the first stationary contact 8 is abutted by the engaged upper housing 1.1 and lower housing 1.2.

[0083] like Figures 5 to 10 As shown, as a further embodiment of the assembly of the moving contact 3, the first insulating seat 7, and the first stationary contact 8, the upper housing 1.1 is provided with a seat to accommodate the moving contact 3, the first insulating seat 7, and the first stationary contact 8;

[0084] The moving contact 3, the first insulating seat 7, and the first stationary contact 8 are sequentially pressed together in the seat opening direction of the upper housing 1.1 by a concave-convex structure, and the pressing direction is configured to be vertical. Based on the above pressing and fitting, the lower housing 1.2 fits with the upper housing 1.1 and abuts against the first stationary contact 8 and the first insulating seat 7 to constrain the relative position of the conductive sheet assembly on the housing assembly 1. Through the above improvements, the first insulating seat 7 provides a positioning position for the fixing part 3.2 of the moving contact 3 and the first stationary contact 8. Through the engagement of the housing assembly 1, the moving contact 3 is pressed by the first insulating seat 7, and the first stationary contact 8 is pressed separately. The pressing is done step by step in the vertical direction, thereby eliminating the internal movement gap.

[0085] The following further explains the seat and concave-convex structure between the moving contact 3, the first insulating seat 7, the first stationary contact 8 and the upper housing 1.1. The seat on the upper housing 1.1 corresponding to the fixing part 3.2 of the moving contact 3 is defined as the first seat 1.12, and the seat corresponding to the first insulating seat 7 is defined as the second seat 1.13.

[0086] like Figure 10 As shown, the movable contact 3 includes an elastic part 3.1 actuated by the pressing component 2 and a fixed part 3.2, which is a sheet-shaped conductive sheet. The first bases 1.12 are spaced apart in the width direction and provide planar support for the fixed parts 3.2. The elastic part 3.1 is disposed between the spaced first bases 1.12. The first bases 1.12 are provided with a first slot 1.121. The end of the fixed part 3.2 is provided with a first protrusion 3.21, which is inserted into the first slot 1.121.

[0087] Reference Figure 5 and Figure 6 In addition, the upper housing 1.1 is also provided with a first pressing port 1.14 for the extension of the fixing part 3.2 of the movable contact piece 3.2. The fixing part 3.2 is provided with a first extension 3.22 on the inner side of the first pressing port 1.14. The first extension 3.22 abuts against the inner wall of the upper housing 1.1, thereby initially positioning the movable contact piece 3 in the horizontal direction.

[0088] The first groove 7.1 of the first insulating base 7 faces the first base body 1.12 and is spaced apart from the first base body 1.12 to accommodate the movable contact piece 3.

[0089] Specifically, the second seat 1.13 is arranged adjacent to the first seat 1.12, the first insulating seat 7 is supported on the plane where the upper end of the first slot 1.121 is located, and the second seat 1.13 extends to one side of the first slot 1.121 to form a second slot 1.131. The second slot 1.131 is vertically open, and the first insulating seat 7 has a corner portion 7.3 that is inserted into the second slot 1.131;

[0090] In the length direction, the first insulating seat 7 is provided with a first recess 7.4, and the second seat body 1.13 is provided with a vertically extending second protrusion 1.132. The first recess 7.4 and the second protrusion 1.132 are connected to each other in the length direction.

[0091] In the width direction, one end of the first insulating base 7 has a first pressing part 7.5 inserted into the first pressing port 1.14. The first pressing part 7.5 is pressed on the fixing part 3.2 and is flush with the outer wall of the upper housing 1.1. The lower housing 1.2 is joined to the upper housing 1.1 and abuts against the first pressing part 7.5. The first pressing part forms a retaining edge on the second groove so that the end of the first stationary contact piece abuts against it.

[0092] The other end of the first insulating seat 7 abuts against the inner wall of the upper housing 1.1 opposite to the side of the first pressing port 1.14, and exposes the second groove 7.2. The upper housing 1.1 has a second pressing port 1.15 opposite to the second groove 7.2. The second pressing port 1.15 is used for the first stationary contact piece 8 to rest on and for the first stationary contact piece 8 to extend out. The lower housing 1.2 is engaged with the upper housing 1.1 and pressed against the first stationary contact piece 8.

[0093] like Figure 13 As shown, specifically, the second groove 7.2 is provided with a fitting surface 7.21 that conforms to the contours of the bimetallic strip 4 and the first stationary contact 8, and the second groove 7.2 is provided with a third protrusion 7.6 in the width direction. One end of the first stationary contact 8 is provided with a second recess 8.1 that is inserted into the third protrusion 7.6. The other end of the first stationary contact 8 extends out of the housing assembly 1, and the first stationary contact 8 is provided with a third recess 8.2 on both sides corresponding to the second pressure port 1.15. The third recess 8.2 is inserted and positioned with the wall surface of the upper housing 1.1 that constitutes the second pressure port 1.15, and the lower housing 1.2 is provided with a pressing rib 1.21 corresponding to the end face of the first stationary contact 8 to further press the first stationary contact 8, thereby pressing the first stationary contact 8, the first insulating seat 7 and the fixing part 3.2 of the moving contact 3 in the vertical direction in sequence.

[0094] like Figure 12 and Figure 13 As shown, specifically, the positioning assembly also includes a second insulating seat 10; the second stationary contact 9 and the second insulating seat 10 are sequentially pressed and fitted in the seat opening direction of the upper housing 1.1 through a concave-convex structure, and the lower housing 1.2 fits with the upper housing 1.1 and abuts against the first stationary contact 8 and the first insulating seat 7, so as to constrain the relative position of the conductive sheet assembly on the housing assembly 1.

[0095] The following further explains the concave-convex structure and seat body between the second insulating base 10, the upper housing 1.1, and the second stationary contact 9, from... Figure 6 As can be seen, the upper housing 1.1 is provided with a seat for accommodating the second stationary contact 9 and the second insulating seat 10. The upper housing 1.1 is provided with a third seat 1.16 that supports the end face of the second stationary contact 9 in the vertical direction and a fourth seat 1.17 that constrains the second stationary contact 9 in the horizontal direction. The third seat 1.16 refers to the protrusion on the inner end face of the upper housing 1.1. The fourth seat 1.17 is disposed on one side of the third seat 1.16. The side of the second stationary contact 9 is provided with a fourth recess 9.1, and the fourth seat 1.17 is placed in the fourth recess 9.1.

[0096] In the width direction, the upper housing 1.1 is provided with a third pressure port 1.18 and a fourth pressure port 1.19 arranged opposite to each other. One end of the second stationary contact piece 9 is inserted into the third pressure port 1.18, and the other end of the second stationary contact piece 9 extends out of the fourth pressure port 1.19.

[0097] The middle part of the second insulating seat 10 abuts against the inner wall of the upper housing 1.1 and is pressed onto the end face of the fourth seat body 1.17 and the second stationary contact piece 9. The two ends of the second insulating seat 10 are inserted into and filled into the third pressure port 1.18 and the fourth pressure port 1.19. The two ends of the second insulating seat 10 form the second pressing part 10.2 and are pressed into the third pressure port 1.18 and the fourth pressure port 1.19. The third pressure port 1.18 and the fourth pressure port 1.19 are provided with the fifth recess 1.191 located inside the housing assembly 1. The second pressing part 10.2 is provided with the fourth protrusion 10.1 inserted into the fifth recess 1.191. The lower housing 1.2 is joined to the upper housing 1.1 and pressed onto the second insulating seat 10.

[0098] Through the above improvements, the housing assembly 1 limits and presses the conductive sheet assembly in the vertical and horizontal directions through the positioning assembly. In addition, the reset part 5.2 of the reset rod 5 passes through the fourth seat 1.17.

[0099] Further reference Figure 6 Specifically, the housing assembly 1 includes an upper housing 1.1 and a lower housing 1.2. The adjacent end faces of the upper housing 1.1 and the lower housing 1.2 are provided with oppositely arranged latches 1.3 and latching grooves 1.4. The upper housing 1.1 and the lower housing 1.2 are fastened to each other and pressed against the conductive sheet assembly and the positioning assembly. The lower housing 1.2 includes first latches 1.3 arranged at both ends in the length direction, and the upper housing 1.1 includes second latches 1.3 arranged at both ends in the width direction. This allows the upper housing 1.1 and the lower housing 1.2 to be subjected to vertically opposite tensioning action to ensure the pressing action of the housing assembly 1 on the internal components.

[0100] The second buckle is positioned between the upper housing 1.1 and the lower housing 1.2, and is located between the first stationary contact piece 8 and the second stationary contact piece 9, thereby improving the stability under force.

[0101] Specifically, the openings of the upper and lower housings are arranged opposite to each other in the actuation direction of the pressing assembly. That is, the concave and convex structures on the upper housing and the seat are also open in the actuation direction of the pressing assembly, which is vertical.

[0102] like Figure 18As shown, this utility model also provides a socket 11, including the above-mentioned double reset overload protection button switch, including a socket 11 housing, the socket 11 housing is provided with a first opening 11.1 and a second opening 11.2, the first opening 11.1 is used to expose the upper end of the button assembly, and the second opening 11.2 is used to expose the operating end of the reset rod 5.

[0103] In the initial state, the reset rod 5 is retracted into the first opening 11.1. In the overload state, the bimetallic strip 4 tilts up and lifts the reset rod 5 so that the operating part 5.1 is close to, flush with or extends out of the first opening 11.1.

[0104] or,

[0105] In the initial state, the reset rod 5 is flush with the first opening 11.1. In the overload state, the bimetallic strip 4 tilts up and lifts the reset rod 5 so that the operating part 5.1 and the first opening 11.1 extend out of the first opening 11.1.

[0106] The purpose of this embodiment is to provide users with an intuitive way to observe the overload state of the bimetallic strip. Under normal conditions, the reset rod can be set to be retracted into the first opening, flush with the first opening, or slightly protruding from the first opening. After the bimetallic strip is raised, it provides a vertical lifting effect on the reset rod, so that the reset rod extends further relative to the first opening. It is only necessary to provide a change in position within the first opening so that users can judge whether there is an overload by the position of the reset rod.

[0107] For the reset rod that initially receives the first opening, when it is lifted, the reset rod may still be in the receiving state, flush with the first opening, or extended out of the first opening.

[0108] For the reset rod that is initially flush with the first opening, when it is lifted, the reset rod extends further out of the first opening.

[0109] For the reset rod that initially extends out of the first opening, when it is lifted, the reset rod extends further out of the first opening.

[0110] like Figures 7 to 10 As shown, during the assembly process:

[0111] S1. Invert the upper housing 1.1 so that the opening of the upper housing 1.1 faces upwards;

[0112] S2. Assemble the first stationary contact 8, the moving contact 3, and the bimetallic strip 4. Place the moving contact 3 into the concave-convex structure of the upper housing 1.1 for limitation. Place the first insulating seat 7 on the fixed part 3.2 of the moving contact 3 and limit the first insulating seat 7 in the concave-convex structure of the upper housing 1.1. Place the first stationary contact 8 and the first insulating seat 7 and the concave-convex structure on the upper housing 1.1 for mutual limitation. At this time, the first insulating seat 7 separates the moving contact 3 and the first stationary contact 8.

[0113] S3. Assemble the second stationary contact 9 and the second insulating seat 10. Place the second stationary contact 9 in the concave-convex structure of the upper housing 1.1 for limitation. Place the second insulating seat 10 and press it onto the second stationary contact 9. Limit the second insulating seat 10 in the concave-convex structure of the upper housing 1.1. At this time, the second insulating seat 10 is spaced between the second stationary contact 9 and the bimetallic strip 4. The bimetallic strip 4 extends between the first insulating seat 7 and the second insulating seat 10.

[0114] S4. Assemble the lower housing 1.2, align the openings of the lower housing 1.2 and the upper housing 1.1 and fasten them together. The upper housing 1.1 presses against the first stationary contact 8, the first insulating seat 7 and the second insulating seat 10.

[0115] This utility model uses a positioning component to achieve the assembly method of sequentially assembling conductive sheet assemblies and positioning components on the inverted upper shell 1.1. The operation is simple, and both the positioning component and the conductive sheet assembly are provided with independent positioning concave and convex structures in the upper shell 1.1 to ensure positional stability during the assembly process.

[0116] The upper housing 1.1 has a central receiving groove containing a ratchet structure 12. The ratchet structure 12 cooperates with the pressing assembly 2. The ratchet structure 12 cooperates with the elastic part 3.1 of the moving contact 3 via an actuating spring 13. The upper housing 1.1 has conductive springs 15 on both sides of the ratchet structure 12. The conductive springs 15 are connected to the lamp panel assembly 14, with one conductive spring 15 abutting against the moving contact 3 and the other conductive spring 15 abutting against the second stationary contact 9. The lamp panel assembly 14 is mounted on the pressing bracket 2.1. Two limiting posts 1.5 extend vertically on both sides of the upper housing 1.1. The upper end of the limiting post 1.5 has a limiting protrusion 1.51. The pressing bracket 2.1 is snapped into the limiting post 1.5 and supported by the conductive spring 15. The above structure is a conventional technical means of a push-button switch and has been fully disclosed in the prior art.

[0117] Based on the above, during the assembly process, in S1, the ratchet structure 12 and the actuation spring 13 are placed in the receiving groove in sequence. After completing S4, the housing assembly 1 is placed face up, and then the reset rod 5 is inserted from the upper housing 1.1 and the spring is put in. The conductive spring 15 is placed in the housing assembly 1. The lamp panel assembly 14 is pre-assembled into the pressing bracket 2.1. Finally, the pressing bracket 2.1 is snapped into the limiting post 1.5, thereby optimizing the assembly process.

[0118] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A double-reset overload protection push button switch, characterized in that, include: The housing assembly (1), the pressing assembly (2) movably disposed on the housing assembly (1), and the conductive sheet assembly disposed within the housing assembly (1); The conductive sheet assembly includes: Movable contact piece (3), which is disposed relative to the pressing component (2); Bimetallic sheet (4), and an extension edge (4.1) formed on the bimetallic sheet (4), one end of the extension edge (4.1) is provided with a stationary contact point (4.2) disposed relative to the moving contact piece (3), and the other end of the extension edge (4.1) is provided with a raised portion (4.3); The pressing component (2) actuates the movable contact piece (3) by pressing, so that the movable contact piece (3) contacts the stationary contact (4.2), and the movable contact piece (3) separates from the stationary contact (4.2) when the pressing component (2) is reset; The extended edge (4.1) is configured to bend under overload conditions so that the stationary contact (4.2) moves away from the moving contact (3) and separates from the moving contact (3); It also includes a reset rod (5), which has an operating part (5.1) and a reset part (5.2). The operating part (5.1) is exposed in the assembly environment, and the operating part (5.1) is located near the upper end face of the pressing assembly (2). The reset part (5.2) is located towards the bimetallic strip (4) and is returned to the initial state by the actuation force received by the operating part (5.1) under overload conditions.

2. The overload protection push button switch with dual reset according to claim 1, characterized in that: An elastic element (6) is also provided between the reset rod (5) and the pressing assembly (2). The elastic element (6) acts on the reset rod (5) and restricts the axial movement of the reset rod (5).

3. The overload protection push button switch with dual reset according to claim 1, characterized in that: The housing assembly (1) includes an upper housing (1.1) and a lower housing (1.2) that are spliced ​​together to form a cavity; The reset rod (5) also includes a support part (5.3). The reset part (5.2) and the operating part (5.1) are offset on the support part (5.3). The upper housing (1.1) is provided with a receiving groove (1.11) for accommodating the support part (5.3). The reset part (5.2) passes through the housing assembly (1), and the operating part (5.1) passes through the pressing assembly (2).

4. The overload protection push button switch with dual reset according to claim 1, characterized in that: The housing assembly (1) is provided with a positioning component, which is arranged as a seat and is spaced apart from the conductive sheet assembly and cooperates with the housing assembly (1) to constrain the conductive sheet assembly within the housing assembly (1).

5. A double-reset overload protection push button switch according to claim 4, characterized in that: The positioning component includes a first insulating seat (7), which separates the movable contact (3) and the bimetallic strip (4). The first insulating seat (7) is provided with a first groove (7.1) for accommodating the movable contact (3) and a second groove (7.2) for accommodating the bimetallic strip (4). The first groove (7.1) and the second groove (7.2) are offset from each other, and the opening directions of the first groove (7.1) and the second groove (7.2) are opposite to each other.

6. The overload protection push button switch with dual reset according to claim 5, characterized in that: The housing assembly includes an upper housing (1.1) and a lower housing (1.2) that are spliced ​​together to form a cavity; the conductive sheet assembly also includes a first stationary contact (8) extending on the bimetallic sheet (4); the upper housing (1.1) is provided with a seat that cooperates with the moving contact (3), the first insulating seat (7), and the first stationary contact (8); The moving contact (3), the first insulating seat (7), and the first stationary contact (8) are sequentially pressed together in the seat opening direction of the upper housing (1.1) through a concave-convex structure. The lower housing (1.2) cooperates with the upper housing (1.1) and abuts against the first stationary contact (8) and the first insulating seat (7) to constrain the relative position of the conductive sheet assembly on the housing assembly (1).

7. A double-reset overload protection push button switch according to claim 6, characterized in that: The conductive sheet assembly further includes a second stationary contact (9), and the positioning assembly further includes a second insulating seat (10); The upper housing (1.1) is provided with a seat for accommodating the second stationary contact (9) and the second insulating seat (10). The second stationary contact (9) and the second insulating seat (10) are sequentially pressed and fitted in the direction of the seat opening of the upper housing (1.1) through a concave-convex structure. The lower housing (1.2) fits with the upper housing (1.1) and abuts against the first stationary contact (8) and the first insulating seat (7) to constrain the relative position of the conductive sheet assembly on the housing assembly (1).

8. The overload protection push button switch with dual reset according to claim 1, characterized in that: The housing assembly (1) includes an upper housing (1.1) and a lower housing (1.2). The upper housing (1.1) and the lower housing (1.2) have oppositely arranged latches (1.3) and latches (1.4) on their adjacent end faces. The upper housing (1.1) and the lower housing (1.2) have oppositely arranged openings in the actuation direction of the pressing assembly. The upper housing (1.1) and the lower housing (1.2) are interlocked and press the conductive sheet assembly and the positioning assembly.

9. A double-reset overload protection push button switch according to claim 1, characterized in that: The reset rod (5) is driven to the pressing assembly (2), and the reset part actuates the lifting part to reset the bimetallic strip.

10. A socket (11) comprising a double-reset overload protection push button switch as described in claim 1, characterized in that: Includes a socket (11) housing, the socket (11) housing having a first opening (11.1) and a second opening (11.2), the first opening (11.1) being for the upper end of the pressing assembly (2) to be exposed, and the second opening (11.2) being for the operating end of the reset rod (5) to be exposed; In the initial state, the reset rod (5) is retracted into the first opening (11.1). In the overload state, the bimetallic strip (4) tilts up and lifts the reset rod (5) so that the operating part (5.1) is close to, flush with, or extends out of the first opening (11.1); or, in the initial state, the reset rod (5) is flush with the first opening (11.1). In the overload state, the bimetallic strip (4) tilts up and lifts the reset rod (5) so that the operating part (5.1) and the first opening (11.1) extend out of the first opening (11.1).

Images