Overload prompt button switch and assembly method thereof

Abstract

The invention discloses an overload prompting button switch and an assembling method thereof, the overload prompting button switch comprises a shell assembly, a button assembly movably arranged in the shell assembly and a conducting strip assembly arranged in the shell assembly, the shell assembly comprises at least two shell components which are in butt joint with each other, and the conducting strip assembly comprises a bimetallic strip, a metal sheet and a metal sheet, the movable contact piece and the overload conducting piece are arranged on the bimetallic strip at an interval; the bimetallic strip has an initial pose and an overload pose, the movable contact piece is opposite to the button assembly and is arranged to be in contact with the bimetallic strip in the initial pose under the pressing effect to be in a power-on state, the bimetallic strip is far away from the movable contact piece in the overload pose, and the overload conducting strip is arranged in an overload motion path of the bimetallic strip. The overload conducting strip is conducted with the overload posture bimetallic strip; and the signal release unit is used for releasing a power-on signal in a power-on state and releasing an overload signal in an overload state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switches, in particular to a button switch with overload prompt and an assembling method thereof. BACKGROUND

[0002] Button switches are commonly used power control devices on the market, especially widely used in power strips and household appliances, so their safety performance is crucial. In order to improve the safety of electricity, most power strips on the market are equipped with overload protection devices. One common solution is to integrate a bimetallic strip overload protection mechanism in the button switch.

[0003] The button switch in the prior art usually includes a button body, a moving contact and a bimetallic strip arranged in the button. Under normal operation, when the user presses the button, the moving contact is in contact with the bimetallic strip, at which time the circuit is turned on, and the electrical appliance connected with the button switch is powered on. At the same time, the lamp bead on the circuit board in the button is lit to indicate that it is currently in the power-on state. When an overload occurs in the circuit, the bimetallic strip deforms due to heat, thereby moving away from the moving contact, causing the moving and stationary contacts to separate, and the circuit is forcibly disconnected, achieving overload protection. At this time, with the disconnection of the circuit, the lamp bead indicating power-on is also extinguished.

[0004] However, the above-mentioned existing overload protection scheme has a obvious defect: the state indication is not clear. Whether the user normally turns off the switch or the switch is tripped for overload protection, the final external appearance is that the switch is reset and the indicator light is extinguished. The user cannot directly and quickly distinguish from the appearance whether the current switch is in the "normal off" state or the "trip due to overload" state.

[0005] This ambiguity brings inconvenience and potential safety hazards to the user. For example, after the overload trip occurs, the user may mistakenly press the switch again thinking it is normal power-off. If the high-power electrical equipment causing the overload has not been removed at this time, turning on the switch again may cause the circuit to repeatedly turn on and off, not only affecting the service life of the equipment, but also possibly exacerbating the risk of the circuit. The user needs to check the electrical equipment connected to the power strip one by one to confirm the cause of the trip, which is tedious and not intuitive. Therefore, the existing technology urgently needs an indication scheme that can clearly and intuitively distinguish between normal on-off and overload protection state. SUMMARY

[0006] In view of the deficiencies in the prior art, the purpose of the present application is to provide a button switch with overload prompt.

[0007] The technical problem of the present application is solved by the following technical solution: a button switch with overload prompt, comprising a housing assembly, a button assembly movably arranged in the housing assembly, and a conductive sheet assembly arranged in the housing assembly, the housing assembly comprising at least two mutually abutting housing members, and the conductive sheet assembly comprising: a bimetallic sheet, a movable contact sheet and an overload conductive sheet arranged at intervals on the bimetallic sheet; The bimetallic sheet has an initial position and an overload position deformed relative to the initial position in an overload state, the movable contact sheet is opposite to the button assembly and is arranged to be in contact with the bimetallic sheet in the initial position under the pressing action to reach a power-on state, the bimetallic sheet is away from the movable contact sheet in the overload position, the overload conductive sheet is arranged in the overload movement path of the bimetallic sheet, and the overload conductive sheet is in conduction with the bimetallic sheet in the overload position; Further comprising a signal release unit, the signal release unit is engaged with the conductive sheet assembly and releases a power-on signal in the power-on state and an overload signal in the overload state.

[0008] Further, the signal release unit is arranged as a first light emitting member and a second light emitting member, the first light emitting unit is connected to the movable contact sheet, the second light emitting unit is connected to the overload conductive sheet, and the signal release unit is integrated in the button assembly or arranged in an application appliance of the button switch.

[0009] Further, the conductive sheet assembly further comprises a first stationary contact sheet, the signal release unit comprises a circuit board, and the first stationary contact sheet, the overload conductive sheet and the movable contact sheet are respectively connected with conductive springs, the conductive springs are arranged through the housing assembly and connected with the circuit board.

[0010] Further, the bimetallic sheet comprises a second contact sheet part and a first contact sheet part, the second contact sheet part and the first contact sheet part move with the deformation of the bimetallic sheet in the overload state, the movable contact sheet is in contact with the second contact sheet part under the pressing action to reach the power-on state, the second contact sheet part is away from the movable contact sheet in the overload position, the first contact sheet part is in conduction with the overload conductive sheet in the overload position, and the overload conductive sheet is provided with a first abutting part opposite to the first contact sheet part.

[0011] Further, the bimetallic sheet comprises a first contact sheet part opposite to the free end of the movable contact sheet, the first contact sheet part is away from the movable contact sheet and in conduction with the overload conductive sheet in the overload position, and the overload conductive sheet is provided with a first abutting part opposite to the first contact sheet part.

[0012] Further, the overload conductive sheet comprises a fixed part, the fixed part is abutted between the abutting parts of the housing members.

[0013] Furthermore, the overload conductive sheet is provided with a positioning hole, and the housing component is provided with a positioning post passing through the positioning hole.

[0014] Furthermore, the housing assembly also includes a first insulating seat and a second insulating seat constrained within the housing member and spaced apart from the conductive sheet assembly. The first insulating seat and the second insulating seat are disposed on both sides of the housing assembly with respect to a first direction. The overload conductive sheet is supported across the first insulating seat and the second insulating seat, and the overload conductive sheet is disposed on the free end side of the moving contact sheet with respect to a second direction perpendicular to the first direction. A third conductive spring is connected between the overload conductive sheet and the signal release unit, and the third conductive spring is arranged between the first insulating seat and the second insulating seat.

[0015] Furthermore, the overload conductive sheet is at least partially engaged with the first insulating seat or the second insulating seat; or, the overload conductive sheet is at least partially abutting between the first insulating seat and the housing member; or, the overload conductive sheet is at least partially abutting between the second insulating seat and the housing member.

[0016] The present invention also provides an assembly method for an overload warning push-button switch, which, when using the above-mentioned push-button switch, includes the following steps: S1. The button assembly is pre-assembled. The housing component includes an upper shell and a base that are spliced ​​together. The button assembly also includes a ratchet pressing mechanism and a button bracket that carries the signal release unit, which are set inside the upper shell. The ratchet pressing mechanism is set opposite to the moving contact piece. The button bracket is put into the support of the upper shell. The upper shell is inverted and the ratchet pressing mechanism is placed inside the upper shell. S2. Insert the conductive spring into the opening of the upper shell and align the conductive spring with the circuit board in the button assembly; S3. The first stationary contact piece and the moving contact piece are assembled. A first positioning seat and a second positioning seat are set inside the upper shell. The moving contact piece is placed on the first positioning seat according to its opening contour, and one end of the moving contact piece extends out of the upper shell. The first stationary contact piece is placed on the second positioning seat according to its opening contour, and one end of the first stationary contact piece extends out of the upper shell. S4. Assemble the first insulating base and the second insulating base, pre-clamp the overload conductive sheet into the upper shell or the second insulating base, clamp the second insulating base into the side wall opening on one side of the upper shell and press it onto the first stationary contact sheet; clamp the first insulating base into the side wall opening on the other side of the upper shell and press it onto the fixed piece of the moving contact sheet and the end of the overload conductive sheet. S5. Bimetallic strip assembly, a second stationary contact is also fixed on the bimetallic strip, the second stationary contact is arranged in the second groove, and the second stationary contact is aligned with the side wall opening of the upper shell. Finally, the base is covered on the inverted upper shell, the base is pressed against the side wall opening of the upper shell, and the conductive sheet assembly is constrained.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: By adding an overload conductive sheet and an independent signal release component inside the switch, the present invention allows the moving contact to be pressed and in contact with the bimetallic strip under normal energization. At this time, the bimetallic strip and the overload conductive sheet are kept at a distance. When overload protection occurs, the bimetallic strip deforms and moves away from the moving contact, disconnecting the circuit and the original energizing signal. The first contact portion on the bimetallic strip comes into contact with the overload conductive sheet due to deformation and releases an overload signal. The overload signal and the energizing signal can be indicator lights of different colors, realizing differentiated indication of circuit status. This allows users to clearly distinguish between the three states of "normal energization", "normal shutdown" and "overload", improving user experience and safety, and providing clear and intuitive status indication. The overload conductive plate is connected to the circuit board via an independent third conductive spring, forming an independent overload indication circuit. This circuit is only activated when the overloaded bimetallic strip comes into contact with the overload conductive plate, and is isolated from the main circuit and the normal indicator light circuit. This layout not only avoids signal interference, but also ensures the accuracy of the indication and the reliability of the system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention in the power-off state; Figure 3 This is a cross-sectional view of the invention under overload conditions; Figure 4 This is a front view of the present invention after the top shell has been removed; Figure 5 This is a schematic diagram of the structure of the present invention after the upper shell has been removed; Figure 6 This is a schematic diagram of the conductive sheet assembly and base of the present invention; Figure 7 This is an exploded view of the upper shell and conductive sheet assembly of the present invention; Figure 8 This is an exploded view of the base and conductive sheet assembly of the present invention; Figure 9 This is a front view of the inverted upper shell of the present invention without the conductive sheet assembly installed; Figure 10 This is a structural diagram of the inverted upper shell of the present invention without the conductive sheet assembly installed. Figure 11 This is a front view of the inverted upper shell of the present invention with the second insulating base and the moving contact piece installed. Figure 12 This is a structural diagram of the inverted upper shell of the present invention, incorporating the second insulating base and the moving contact piece; Figure 13This is a front view of the inverted upper shell of the present invention being fitted into the first insulating base; Figure 14 This is a structural diagram of the inverted upper shell of the present invention being fitted with the first insulating base; Figure 15 A front view of the inverted upper shell of the present invention with the bimetallic strip and the second stationary contact piece inserted; Figure 16 This is a structural diagram of the inverted upper shell of the present invention, incorporating a bimetallic strip and a second stationary contact piece. Figure 17 This is an exploded view of the button assembly of the present invention; Figure 18 This is a bottom schematic diagram of the button assembly of the present invention; Figure 19 This is a schematic diagram of the circuit board structure of the present invention; Figure 20 This is a schematic diagram of the structure of a second embodiment of the overload conductive sheet of the present invention; Figure 21 This is an exploded view of a second embodiment of the overload conductive sheet of the present invention; Figure 22 This is a schematic diagram of the structure of the third embodiment of the overload conductive sheet of the present invention; In the picture: 1. Upper shell; 1.1. Support column; 1.2. Limiting part; 1.3. First pressing port; 1.4. Second pressing port; 1.5. Third pressing port; 1.6. Fourth pressing port; 2. Base; 3. Button assembly; 3.1 Button bracket; 3.2 Card slot; 3.3 Positioning rod; 3.4 Card block; 4. Bimetal piece; 4.1, second contact piece; 4.2, first contact piece; 4.3, second static contact piece; 4.31, second recess; 4.32, third recess; 5. Moving contact piece; 5.1. Elastic arm; 5.2. Fixed piece; 5.3. First conductive spring; 5.21. First protrusion; 5.22. Angular portion; 6. Overload conductive sheet; 6.1. First mating part; 6.2. Second mating part; 6.3. Third conductive spring; 6.4. Positioning hole; 6.5. Fixing part; 7. Circuit board; 7.1. First light-emitting component; 7.2. Second light-emitting component; 7.3. Conductive part; 7.4. Limiting hole; 8. First insulating base; 8.1. First groove; 8.2. Second groove; 8.3. Supporting step; 8.4. Adapting surface; 8.5. Corner portion; 8.6. First recess; 8.7. First pressing portion; 8.8. Third protrusion; 9. Second insulating base; 9.1. Buckle foot; 9.2. Opening space; 9.3. Second pressing part; 10. The first positioning seat; 10.1. The first seat; 10.11. The first notch; 10.2. The second seat; 10.21. The second notch; 10.22. The second convex portion; 11. Second positioning seat; 11.1. Third seat body; 11.2. Fourth seat body; 12. Reset rod; 12.1. Support spring; 12.2. Reset part; 12.3. Locking part; 13. First stationary contact piece; 13.1. Second conductive spring; 13.2. Fourth recess; 14. Ratchet pressing mechanism; 14.1. Ratchet sleeve; 14.2. First ratchet; 14.3. Second ratchet; 14.4. Return spring; 15. Dating point; 15.1. Positioning post; 16. Positioning groove; Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] 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.

[0021] like Figures 1-19 As shown, an overload warning button switch includes: The housing assembly includes a button assembly 3 movably disposed within the housing assembly and a conductive sheet assembly disposed within the housing assembly. The button assembly 3 can be held in a pressed position or a de-energized position by pressing. The housing assembly includes at least two housing members that abut against each other. The button assembly 3 is fitted to the housing members, and the conductive sheet assembly is accommodated between the housing members. The conductive sheet assembly includes: The bimetallic strip 4, and the movable contact 5 and the overload conductive strip 6 spaced apart from the bimetallic strip 4. The bimetallic strip 4 has an initial pose and an overload pose that deforms relative to the initial pose under overload conditions. The movable contact 5 is opposite to the button assembly 3 and is configured to contact the bimetallic strip 4 in the initial pose to achieve an energized state under pressing action. The bimetallic strip 4 deforms and displaces under overload pose, thereby moving away from the movable contact 5. The overload conductive sheet 6 is disposed in the overload movement path of the bimetallic strip 4 and is conductive with the bimetallic strip 4 in the overload pose. Under overload conditions, the button assembly 3 remains in the pressed position, while the bimetallic strip 4 deforms under overload action. Thus, two indication circuits are provided through the normal bimetallic strip 4 and movable contact 5, and the overloaded bimetallic strip 4 and overload conductive sheet 6, thereby providing different indication signals.

[0022] In this embodiment, a signal release component is also included. The signal release component is connected to the conductive sheet component described above and releases an energizing signal in the energized state and an overload signal in the overload state. The signal release component is preferably composed of two signal release units. The two signal release units are respectively connected through the moving contact 5 and the overload conductive sheet 6 to release different prompt signals. The prompt signals are preferably lights of different colors.

[0023] Specifically, the signal release component is configured as a first light-emitting component 7.1 and a second light-emitting component 7.2, constituting the aforementioned signal release unit. The first light-emitting component is connected to the moving contact piece 5, and the second light-emitting component is connected to the overload conductive piece 6. Figure 19 The light-emitting diodes mentioned can also be other light-emitting components such as LEDs. The signal release components are specifically defined as light-emitting components of different colors, such as lamp beads, which provide direct, low-cost, and easy-to-understand visual cues, allowing users to intuitively see the warning lights in overload conditions.

[0024] When the signal release component is implemented as a light, it is not limited to a constantly lit overload light, but can also be a flashing overload light. This will be implemented by the circuit and LED settings on the circuit board 7. The flashing light is a conventional technical means in this field and will not be described in detail here.

[0025] In some embodiments, the signal release component is integrated into the button component 3. On the one hand, this arrangement enables the modularization of the signal release component and the button component 3. On the other hand, the indication position is directly located at the operation point, which conforms to user habits and is convenient to observe.

[0026] In other embodiments, the signal release component may also be disposed within the application device of the push-button switch. The application device specifically refers to the device in which the push-button switch of this embodiment is disposed, such as a power strip with the push-button switch or other household appliances. In such applications, the signal release component can be disposed separately from the push-button switch and disposed on the housing of the application device for easier and more intuitive observation. The connection between the signal release component and the conductive sheet assembly can be led out by a lead wire. That is, compared with the above embodiments, the signal release component is disposed outside the push-button switch and additional lead wires are required to lead the signal to other parts of the device, thereby increasing the diversity of product design.

[0027] like Figure 4 and Figure 5 As shown, specifically, the conductive sheet assembly also includes a first stationary contact 13, and the signal release assembly includes a circuit board 7. Conductive springs are respectively connected to the first stationary contact 13, the overload conductive sheet 6, and the moving contact 5. The conductive springs pass through the housing assembly and are connected to the circuit board 7. The conductive springs are used as the connection medium between the circuit board 7 and the conductive sheet. The elasticity and compressibility of the springs are utilized to ensure that the button can withstand frequent pressing and return actions.

[0028] Specifically, the conductive springs are divided into a first conductive spring 5.3, a second conductive spring 13.1, and a third conductive spring 6.3. The first conductive spring 5.3 abuts against the free end of the moving contact 5, the second conductive spring 13.1 abuts against the first stationary contact 13, and the third conductive spring 6.3 abuts against the overload conductive sheet 6. The moving contact 5 and the bimetallic strip 4 serve as the live wire end, and the first stationary contact 13 serves as the neutral wire end.

[0029] The movable contact 5 is connected to a first conductive spring 5.3, which is connected to the first light-emitting component 7.1. The first stationary contact 13 is connected to the second conductive spring 13.1, and the second conductive spring 13.1 is connected to the circuit board 7; The overload conductive sheet 6 is connected to a third conductive spring 6.3, which is connected to the second light-emitting component 7.2. Under normal pressing conditions, the moving contact 5, the first stationary contact 13, and the first light-emitting component 7.1 form an energized light-emitting circuit, and the bimetallic strip at the live wire end and the moving contact are connected to the circuit. Under overload conditions under pressing conditions, the overload conductive strip 6, the bimetallic strip 4, the first stationary contact 13, and the second light-emitting component 7.2 form an overload light-emitting circuit, and the bimetallic strip is disconnected from the moving contact. The first conductive spring 5.3, the second conductive spring 13.1, and the third conductive spring 6.3 are inserted into the housing assembly.

[0030] Of course, other conductive components can also be set to implement the conduction of the overload light output circuit or the normal light output circuit. For example, flexible conductive leads can be set. In this case, the actuation of the moving contact 5 and the reset of the button assembly 3 can be achieved by the button assembly 3 and the ratchet pressing structure 14 inside the button assembly 3. The advantage of setting a conductive spring is that it can provide stable support for the button assembly 3 through elastic force and maintain reliable cooperation with the circuit board 7. It is also convenient to apply force to the moving contact 5.

[0031] Preferably, the number of shell components is two, including an upper shell 1 and a base 2 that are spliced ​​together by upper and lower snap-fits.

[0032] (Bimetallic strip 4) The bimetallic strip 4 can be composed of metal sheets with different coefficients of 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 expansion is greater than that of the metal sheet with a smaller coefficient of expansion. The metal sheet with a larger coefficient of expansion can compress the metal sheet with a smaller coefficient of expansion, causing them to bend simultaneously. Therefore, the bimetallic strip 4 can have two parts that move relative to each other when overloaded.

[0033] In this embodiment, the shape of the bimetallic strip 4 is not specifically limited. The bimetallic strip 4 only needs to include a contact portion that can move under overload conditions. The contact portion can independently connect with the moving contact 5 and the overload conductive sheet 6 in normal or overload conditions. The contact portion can be an elastic edge with a free end extending on the body of the bimetallic strip 4, or it can be a part on the body of the bimetallic strip 4.

[0034] (Overload conductive sheet 6) like Figures 5 to 8 As shown, as a further embodiment of the overload conductive sheet 6, the overload conductive sheet 6 is preferably a strip-shaped conductive element, preferably a conductive sheet, and the overload conductive element has at least a first mating portion 6.1 and a second mating portion 6.2, and the first mating portion 6.1 is disposed opposite to the bimetallic strip, and the second mating portion 6.2 is used to mate with the third conductive spring 6.3.

[0035] To facilitate the layout of the overload conductive sheet 6, the overload conductive sheet 6 preferably extends along the first direction of the housing assembly, and the overload conductive sheet 6 is arranged on one side of the free end of the moving contact piece 5 about a second direction perpendicular to the first direction. The second mating part 6.2 is preferably located in the middle of the overload conductive sheet 6. This layout optimizes the use of internal space. The overload conductive sheet 6 is installed across both sides of the housing in the original basic layout, and the structure is stable. Its first mating part 6.1 is precisely aligned with the movement path of the first contact part 4.2 of the bimetallic sheet 4, which ensures the accuracy and immediacy of contact during overload deformation and reduces the risk of malfunction or delayed action.

[0036] Optionally, an upward corner may be provided on the second mating portion 6.2 for the insertion of the third conductive spring 6.3, or the second mating portion 6.2 may be configured to extend inward toward the housing assembly, thereby providing a reliable support surface for the third conductive spring 6.3.

[0037] As one embodiment of fixing the overload conductive sheet 6 within the housing assembly. The housing assembly also includes a first insulating seat 8 and a second insulating seat 9 constrained within the base 2 and the upper shell 1. The overload conductive sheet 6 is supported on the first insulating seat 8 and the second insulating seat 9, and the overload conductive sheet 6 at least partially abuts against the first insulating seat 8 or the second insulating seat 9. One end of the overload conductive sheet 6 engages with the first insulating seat 8, and the other end engages with the second insulating seat 9. The first insulating seat 8 and the second insulating seat 9 are pressed into the housing assembly by splicing the base 2 and the upper shell 1. The first insulating seat 8 and the second insulating seat 9 support or engage the overload conductive sheet 6 respectively, ensuring that the overload conductive sheet 6 will not shift or loosen when subjected to vibration during long-term use, thus ensuring the reliability of contact with the bimetallic strip 4 under overload, thereby improving the operating accuracy and long-term stability of the entire protection mechanism. In addition, the first insulating seat 8 and the second insulating seat 9 also provide placement positions for the other conductive sheet assemblies and space the conductive sheet assemblies apart to ensure the safety of the conductive sheet assembly arrangement.

[0038] Combination Figures 6 to 8 As shown, specifically, the first insulating base 8 and the second insulating base 9 are disposed on both sides of the housing assembly in a first direction, and the overload conductive sheet 6 is connected across the first insulating base 8 and the second insulating base 9 along the first direction. from Figure 2 and Figure 3 From the perspective of the middle, the first direction refers to the left and right direction of the housing assembly. Figure 4 and Figure 5 In this context, the second direction refers to the front-to-back direction of the housing assembly.

[0039] The overload conductive sheet 6 has a second mating portion 6.2 at its middle position. The first mating portion 6.1 and the second mating portion 6.2 are specifically folded edges formed on the overload conductive sheet 6, so that the first mating portion 6.1 and the second mating portion 6.2 are integrally formed on the overload conductive sheet 6. The first mating portion 6.1 is arranged downward to face the first contact portion 4.2, and the second mating portion 6.2 is arranged upward to support the third conductive spring 6.3.

[0040] As a further embodiment of constraining the overload conductive sheet 6 within the housing assembly, the first insulating seat 8 and the second insulating seat 9 act on the upper and lower surfaces of the overload conductive sheet 6, respectively. Support steps 8.3 corresponding to the ends and bottom of the overload conductive sheet 6 are provided on the first insulating seat 8 and the second insulating seat 9. These support portions can be either extending in a first direction or formed on the sidewalls of the first and second insulating seats 9. The overload conductive sheet 6 is at least partially engaged with the first insulating seat 8 or the second insulating seat 9; or, the overload conductive sheet 6 is at least partially abutted between the first insulating seat 8 and the housing member; or, the overload conductive sheet 6 is at least partially abutted between the second insulating seat 9 and the housing member.

[0041] Based on the above-mentioned layout of the overload conductive sheet 6 and the first insulating seat 8 and the second insulating seat 9, it is only necessary to span the overload conductive sheet 6 within the original limited space, and to extend a support part of the overload conductive sheet 6 on the first insulating seat 8 and the second insulating seat 9. As for the conductive connection of the overload conductive sheet 6, it is only necessary to additionally insert a third conductive spring 6.3 in the housing assembly.

[0042] Further integration Figure 4 As shown, in this embodiment, another function of the first insulating seat 8 and the second insulating seat 9 is to separate the conductive sheet assembly.

[0043] The first insulating base 8 separates the movable contact 5 and the bimetallic strip 4. The movable contact 5 is provided with a fixed piece 5.2 and an elastic arm 5.1. The fixed piece 5.2 is arranged along the second direction and constrained on the first insulating base 8. The first insulating base 8 constrains the movable contact 5 by conforming to the contour of the fixed piece 5.2. The elastic arm 5.1 protrudes from the upper surface of the first insulating base 8. The upper surface of the elastic arm 5.1 abuts against the first conductive spring 5.3. The bimetallic strip 4 is provided on the back of the first insulating base 8. The second stationary contact 4.3 is also fixedly connected to the bimetallic strip 4. The bimetallic strip 4 and the second stationary contact 4.3 are abutted together between the first insulating base 8 and the base 2. The second stationary contact 4.3 overlaps at least partially with the bimetallic strip 4, and the end of the second stationary contact 4.3 extends out of the housing assembly so that the second stationary contact 4.3 can be abutted by the upper shell 1 and the base 2 that are engaged.

[0044] The second insulating base 9 separates the first stationary contact piece 13 and the bimetallic strip 4. The first stationary contact piece 13 is constrained on the second insulating base 9. The upper surface of the first stationary contact piece 13 is exposed. The upper surface of the first stationary contact piece 13 abuts against the second conductive spring 13.1. The overload conductive strip 6 has a second mating part 6.2 at the middle position. The second mating part 6.2 abuts against the third conductive spring 6.3.

[0045] This design achieves clear partitioning of the internal conductive path. The moving contact 5, the first stationary contact 13, and the overload conductive plate 6 are each connected to the circuit board 7 via independent conductive springs, providing good electrical isolation and avoiding the risk of short circuits. The design of the elastic arm 5.1 ensures good contact pressure when the moving contact 5 contacts the bimetallic strip 4, while the cooperation between the fixed plate 5.2 and the insulating base provides stable mechanical support.

[0046] Further reference Figures 1 to 16 As shown, in the first embodiment of the arrangement of the bimetallic strip 4 and the overload conductive sheet 6, the bimetallic strip 4 includes a second contact portion 4.1 and a first contact portion 4.2. The second contact portion 4.1 and the first contact portion 4.2 move with the deformation of the bimetallic strip 4 under overload conditions. When the button assembly 3 is in the normal power-off position, the bimetallic strip 4 is spaced apart from the moving contact 5 and the overload conductive sheet 6 and the circuit connection is disconnected. In the initial position of the bimetallic strip 4, the moving contact 5 is brought into contact with the second contact part 4.1 and energized under the pressing action of the button assembly 3. At this time, the button assembly 3 is in the pressed position, and the second contact part 4.1 is disconnected from the overload conductive sheet 6. In the overload position of the bimetallic strip 4, the moving contact 5 is disposed opposite to the overload movement path of the second contact portion 4.1. When the bimetallic strip 4 is overloaded, the second contact portion 4.1 moves away from the moving contact 5. The overload conductive piece 6 is disposed in the overload movement path of the first contact portion 4.2, and the overload conductive piece 6 is connected to the first contact portion 4.2 in the overload state. That is, in this embodiment, two contact portions are provided on the bimetallic strip 4. One is used to disconnect the power supply circuit with the moving contact 5 when overloaded, and the other is used to form an overload warning circuit with the overload conductive piece 6 when overloaded.

[0047] like Figure 8 As shown, as a specific configuration of the bimetallic strip 4, the second contact portion 4.1 of the bimetallic strip 4 has a free end, and the free end of the second contact portion 4.1 is provided with a stationary contact point disposed relative to the free end of the moving contact 5. The button assembly 3 actuates the moving contact 5 by pressing it, so that the moving contact 5 contacts the stationary contact point, and the moving contact 5 separates from the stationary contact point when the button assembly 3 is reset to the off position.

[0048] In this embodiment, the bimetallic strip 4 is preferably a frame structure. The second contact portion 4.1 is disposed in the hollowed-out part in the middle of the bimetallic strip 4. The first contact portion 4.2 is disposed on one side of the fixed end of the second contact portion 4.1. Specifically, the first contact portion 4.2 may be formed at the end of the bimetallic strip 4 and located below the first stationary contact 13. In the event of overload, the first contact portion 4.2 tilts upward and the second contact portion 4.1 bends downward. The first contact portion 4.2 and the first stationary contact 13 are separated by the second insulating seat 9. The second stationary contact 4.3 is disposed on one side of the free end of the second contact portion 4.1. likeFigure 2 and Figure 3 As shown, to further explain the bimetallic strip 4, under overload conditions, the stationary contact portion on the second contact portion 4.1 bends downward, while the first contact portion 4.2 bends upward, causing the first contact portion 4.2 to move toward the button assembly 3 so as to contact the overload conductive sheet 6. Since the bottom of the housing assembly can easily support the initial shape of the bimetallic strip 4, it is preferable to place the bimetallic strip 4 below the housing assembly and place the free ends of the overload conductive sheet 6 and the moving contact 5 above the bimetallic strip 4. Of course, if conditions permit, the bimetallic strip 4 can also be mounted inside the housing assembly. In this case, the overload conductive sheet 6 can be placed below the bimetallic strip 4. In this case, it is only necessary to set the first contact portion 4.2 to bend downward when overloaded, and the third conductive spring 6.3 contacts the overload conductive sheet 6.

[0049] In other embodiments, the second contact portion 4.1 has an upward tilted posture from the first contact portion 4.2, thereby providing space for the stationary contact to bend downward under overload conditions.

[0050] In this embodiment, the overload conductive sheet 6 includes a fixing portion 6.5, which is abutted between the mating portions 15 of the housing component. The fixing portion 6.5 extends toward the outer edge of the housing assembly, and the mating portion 15 is located at the outer edge of the housing assembly, so as to further compress the overload conductive sheet 6 by splicing and fixing the housing assembly.

[0051] By setting the aforementioned docking portion 15, the overload conductive sheet 6 is fixed. Thus, in some embodiments, the overload conductive sheet 6 does not require the support of the first insulating seat 8 and the second insulating seat 9, and can be fixed solely by the docking portion 15. However, it is undeniable that the first insulating seat 8 and the second insulating seat 9 further improve the positional stability of the overload conductive sheet 6.

[0052] like Figures 5 to 7 As shown, the fixing part 6.5 is further improved. Preferably, the fixing part 6.5 is located in the middle of the overload conductive sheet 6 and adjacent to the second docking part 6.2, thereby further improving the flatness of the second docking part 6.2 and ensuring the reliability of its docking with the third conductive spring 6.3.

[0053] To further improve the ease of assembly of the overload conductive sheet 6, the overload conductive sheet 6 is provided with a positioning hole 6.4, and the housing component is provided with a positioning post 15.1 passing through the positioning hole 6.4. The positioning post 15.1 is preferably provided on the upper shell 1, so that the overload conductive sheet 6 can be installed sequentially when the upper shell 1 is inverted.

[0054] The positioning post 15.1 can also be set on the docking part 15. While improving the integration of the housing assembly to constrain the overload conductive sheet 6, it also provides preliminary positioning for the fixing part 6.5. The docking part 15 of the base 2 is provided with a clearance opening that matches the positioning post 15.1.

[0055] Through the aforementioned docking portion 15 and the cooperation of the first insulating seat 8 and the second insulating seat 9, the two ends and the middle portion of the overload conductive sheet 6 are respectively constrained and pressed. In this embodiment, the end of the overload conductive sheet 6 located on the first insulating seat 8 is also pressed between the first insulating seat 8 and the upper shell 1, which facilitates assembly and improves positional reliability.

[0056] During assembly, the first stationary contact 13, the second insulating seat 9, and the overload conductive sheet 6 are sequentially pressed onto the opening of the inverted upper shell 1. Optionally, positioning grooves 16 matching the two ends of the overload conductive sheet 6 are provided inside the second insulating seat 9 and the upper shell 1, thereby further restricting the torsional movement of the overload conductive sheet 6.

[0057] like Figure 20 and Figure 21 As shown, in the second embodiment of the overload conductive sheet 6 layout, the difference from the first embodiment is that a clamping part is provided on the second insulating seat 9 or the first insulating seat 8 for the end of the overload conductive sheet 6. Due to the limitation of space arrangement, the first insulating seat 8 can provide a clamping effect on the end of the overload conductive sheet 6 opposite to the upper shell 1, while the second insulating seat 9 is located above the bimetallic strip 4, which is not conducive to cooperating with the base 2 to press the other end of the overload conductive sheet 6. Therefore, it is preferable to provide a clamping part on the second insulating seat 9.

[0058] Specifically, two oppositely arranged latches 9.1 are provided at the bottom of the second insulating base 9, and a gradually narrowing open space 9.2 is defined between the two latches 9.1. The other end of the overload conductive sheet 6 passes through the open space 9.2, and the open space 9.2 allows the first mating part 6.1 to pass through. In the assembly posture, the narrowing surface of the open space 9.2 supports and holds the other end of the overload conductive sheet 6. In this way, the overload conductive sheet 6 can be pre-fastened to the second insulating base 9, which helps to improve assembly efficiency.

[0059] like Figure 22As shown, as a third embodiment of the arrangement of the bimetallic strip 4 and the overload conductive strip 6, based on the characteristic of the bimetallic strip 4 deforming under overload, the movable contact 5 or the overload conductive strip 6 can also be connected to an overload deformed part of the bimetallic strip 4. In this embodiment, a raised part of the bimetallic strip 4 in the initial position is defined as the first contact part 4.2. The free end of the movable contact 5 is disposed on the upper and lower sides of the first contact part 4.2 opposite to the overload conductive strip 6. Preferably, the movable contact 5 is disposed above the first contact part 4.2, and the overload conductive strip 6 is disposed below the first contact part 4.2.

[0060] In the initial position, the first contact portion 4.2 is spaced between the moving contact 5 and the overload conductive sheet 6. Under normal power-on state, when the button assembly 3 is pressed, the moving contact 5 contacts the first contact portion 4.2 and is energized. In the overload position, the first contact portion 4.2 deforms downward, thereby separating from the moving contact 5 and contacting the overload conductive sheet 6.

[0061] The overload conductive sheet 6 differs from the above embodiment in that its first mating portion 6.1 is set at an angle and extends to the bottom of the first contact portion 4.2. In order to facilitate the forming of the overload conductive sheet 6, the first mating portion 6.1 can also be set independently and fixedly connected to the overload conductive sheet 6.

[0062] Preferably, in this embodiment, the connection position between the first docking part 6.1 and the overload conductive sheet 6 is located on the fixed part 6.5, thereby further fixing the overload conductive sheet 6 by splicing the upper shell 1 and the base 2.

[0063] The first docking part 6.1 can be disposed on the same side as the second docking part 6.2, that is, at the middle position of the overload conductive sheet 6.

[0064] It should be noted that in the above embodiments, the positioning hole 6.4 on the overload conductive sheet 6 and the positioning post 15.1 of the housing component can be used, as well as the holding structure of the first insulating seat 8 or the second insulating seat 9 for the overload conductive sheet 6.

[0065] (First positioning seat 10 and second positioning seat 11) like Figures 9 to 16 As shown, the present invention aims to simplify the installation steps of the conductive sheet assembly by optimizing the space of the inner cavity of the upper shell 1, as well as the space of the first insulating seat 8 and the second insulating seat 9.

[0066] Specifically, the upper shell 1 is provided with a first positioning seat 10 and a second positioning seat 11 spaced apart in a first direction. The first positioning seat 10 and the second positioning seat 11 extend in a second direction. Furthermore, the upper shell 1 is a structure with an opening at the bottom, and the first positioning seat 10 and the second positioning seat 11 are arranged to be exposed upward when the upper shell 1 is inverted.

[0067] The fixed piece 5.2 of the movable contact 5 is positioned and supported on the first positioning seat 10. The first insulating seat 8 is pressed onto the fixed piece 5.2 and snapped into the first positioning seat 10. The first insulating seat 8 is provided with a first groove 8.1 for accommodating the movable contact 5 and a second groove 8.2 for accommodating the bimetallic strip 4. The first groove 8.1 and the second groove 8.2 are offset from each other and space the bimetallic strip 4 and the movable contact 5. The opening directions of the first groove 8.1 and the second groove 8.2 are opposite to each other. Through the above improvements, the first insulating seat 8 achieves insulation separation between the movable contact 5 and the first stationary contact 13 and the bimetallic strip 4, and provides independent and distinct installation spaces for each of them.

[0068] The first insulating base 8 is vertically spaced between the fixed portion of the movable contact 5 and the second stationary contact 4.3. The first groove 8.1 and the second groove 8.2 are diagonally arranged in the first direction and the second direction of the housing assembly, respectively. That is, the first groove 8.1 and the second groove 8.2 form a semi-enclosed structure on the first insulating base 8, which can be specifically selected as an L-shaped enclosure.

[0069] The first stationary contact piece 13 is positioned and supported on the second positioning seat 11. The second insulating seat 9 is pressed onto the first stationary contact piece 13 and snapped into the second positioning seat 11. The second insulating seat 9 is spaced between the first stationary contact piece 13 and the overload conductive piece 6. The second insulating seat 9 is provided with a retaining groove that cooperates with the overload conductive piece 6. One end of the overload conductive piece 6 is supported on the first insulating seat 8. The conductive sheet assembly is press-fitted to the housing assembly through a concave-convex structure in the opening direction of the first positioning seat 10, the second positioning seat 11, the first insulating seat 8, and the second insulating seat 9, so as to constrain the conductive sheet assembly within the housing assembly.

[0070] The first positioning seat 10 also abuts against one end of the overload conductive sheet 6 located at the support part in the second direction.

[0071] The above embodiments constitute a multi-layered, high-precision positioning and constraint system. Through the first positioning seat 10 and the second positioning seat 11, the independent first insulating seat 8 and the second insulating seat 9, and the base 2 inside the upper shell 1, the conductive sheet assembly is vertically pressed into place in sequence in the opening direction of the upper shell 1, forming a three-dimensional fixation of the conductive sheet assembly, effectively preventing the components from moving.

[0072] The following further explains the moving contact 5, the first insulating seat 8, the second stationary contact 4.3, the first positioning seat 10, and the concave-convex structure. The seat body on the upper shell 1 corresponding to the fixed piece 5.2 of the moving contact 5 is defined as the first seat body 10.1, and the seat body corresponding to the first insulating seat 8 is defined as the second seat body 10.2. The upper shell 1 is in an inverted posture with the opening facing upward. like Figure 10As shown, the first base 10.1 is spaced apart in the second direction to provide planar support for the fixing piece 5.2, while the elastic arm 5.1 is disposed between the spaced first bases 10.1. The first base 10.1 is provided with a first slot 10.11 in the second direction, and the end of the fixing piece 5.2 is provided with a first protrusion 5.21, which is inserted into the first slot 10.11. Reference Figure 11 and Figure 12 In addition, the side wall of the upper shell 1 is provided with a first pressing hole 1.3 for the extension of the fixing piece 5.2. The fixing piece 5.2 is provided with a bend portion 5.22 on the inner and outer side walls corresponding to the first pressing hole 1.3. The bend portion 5.22 abuts against the inner and outer walls of the upper shell 1, thereby initially positioning the moving contact piece 5 in the horizontal direction.

[0073] The first groove 8.1 of the first insulating base 8 faces the first base body 10.1 and is spaced apart from the first base body 10.1 to accommodate the movable contact piece 5.

[0074] Specifically, the second seat 10.2 is arranged adjacent to the first seat 10.1, the first insulating seat 8 is supported on the plane where the upper end of the first slot 10.11 is located, and the second seat 10.2 extends to one side of the first slot 10.11 to form a second slot 10.21. The second slot 10.21 is vertically open, and the first insulating seat 8 has a corner portion 8.5 that is inserted into the second slot 10.21. In the first direction, the first insulating base 8 is provided with a first recess 8.6, and the second base body 10.2 is provided with a vertically extending second protrusion 10.22. The first recess 8.6 and the second protrusion 10.22 are connected to each other in the first direction. In the second direction, one end of the first insulating base 8 has a first pressing part 8.7 that is inserted into the first pressing port 1.3. The first pressing part 8.7 is pressed on the fixing piece 5.2 at the middle position of the two bends 5.22 and is flush with the outer wall of the upper shell 1. The first pressing part 8.7 has a corner structure that abuts against the inner wall of the upper shell 1, and the base 2 is joined to the upper shell 1 and abuts against the first pressing part 8.7. The other end of the first insulating base 8 abuts against the inner wall of the upper shell 1 away from the side of the first pressing port 1.3, and exposes the second groove 8.2. The upper shell 1 has a second pressing port 1.4 opposite to the second groove 8.2. The second pressing port 1.4 is used for the second stationary contact piece 4.3 to rest and for the second stationary contact piece 4.3 to extend. The base 2 is engaged with the upper shell 1 and pressed against the second stationary contact piece 4.3.

[0075] like Figure 13 and Figure 16As shown, specifically, the second groove 8.2 is provided with a fitting surface 8.4 that conforms to the end contour of the bimetallic strip 4 and the second stationary contact 4.3, and the second groove 8.2 is provided with a third protrusion 8.8 in the second direction. One end of the second stationary contact 4.3 is provided with a second recess 4.31 that is inserted into the third protrusion 8.8, and the other end of the second stationary contact 4.3 extends out of the housing assembly. The second stationary contact 4.3 is provided with a third recess 4.32 on both sides corresponding to the second pressure port 1.4. The third recess 4.32 is inserted into and positioned with the wall surface of the upper shell 1 that constitutes the second pressure port 1.4. The seat is provided with a pressing rib on the end face of the second stationary contact 4.3 to further press the second stationary contact 4.3, thereby pressing the second stationary contact 4.3, the first insulating seat 8 and the fixing piece 5.2 of the moving contact 5 in the vertical direction in sequence.

[0076] The following further explains the second insulating seat 9 and the first stationary contact 13 in the second positioning seat 11 and the concave-convex structure, from Figure 9 and Figure 10 As can be seen, the second positioning seat 11 includes a third seat 11.1 that supports the end face of the first stationary contact piece 13 vertically, and a fourth seat 11.2 that constrains the first stationary contact piece 13 horizontally. The third seat 11.1 refers to the protrusion on the inner end face of the upper shell 1, and the fourth seat 11.2 is disposed on one side of the third seat 11.1. The side of the first stationary contact piece 13 is provided with a fourth recess 13.2, and the fourth seat 11.2 is inserted into the fourth recess 13.2. Further reference Figures 11 to 14 As shown, in the second direction, the upper shell 1 is provided with a third pressure port 1.5 and a fourth pressure port 1.6 arranged opposite to each other. One end of the first stationary contact piece 13 is inserted into the third pressure port 1.5, and the other end of the first stationary contact piece 13 extends out of the fourth pressure port 1.6. The middle part of the second insulating seat 9 abuts against the inner side wall of the upper shell 1 and is pressed against the end face of the fourth seat body 11.2 and the first stationary contact piece 13. The two ends of the second insulating seat 9 are inserted into and filled in the third pressing port 1.5 and the fourth pressing port 1.6. The two ends of the second insulating seat 9 form the second pressing part 9.3 and are pressed tightly in the third pressing port 1.5 and the fourth pressing port 1.6. The third pressing port 1.5 and the fourth pressing port 1.6 form the U-shaped pressing port. The two ends of the second insulating seat 9 are U-shaped pressing parts, which limits the second insulating seat 9 to be pressed into the upper shell 1 only in the vertical direction and restricts the movement of the second insulating seat 9 in the horizontal direction. As a result, the first stationary contact piece 13 is restricted from moving.

[0077] By limiting the first positioning seat 10, the second positioning seat 11, the first insulating seat 8 and the second insulating seat 9, the conductive sheet assembly and the first insulating seat 8 and the second insulating seat 9 are sequentially installed vertically into the opening of the inverted upper shell 1.

[0078] (Upper shell 1 and base 2) Further reference Figure 1 Specifically, the housing assembly includes an upper shell 1 and a base. The upper shell 1 and the base are provided with oppositely arranged latches and latches on their adjacent end faces. The upper shell 1 and the base are fastened to each other and pressed against the conductive sheet assembly, the first insulating seat 8 and the second insulating seat 9. The upper shell 1 and the base are respectively subjected to vertically opposite tension to ensure the pressing effect of the housing assembly on the internal components.

[0079] (Button component 3) Reference Figure 17 and Figure 18 As shown, as a further embodiment of the button assembly 3, the button assembly 3 includes a button bracket 3.1 and a circuit board 7 that is clipped to the bottom of the button bracket 3.1. A first light-emitting component 7.1 and a second light-emitting component 7.2 are disposed on the upper part of the circuit board 7. A conductive part 7.3 that cooperates with a conductive spring is provided on the lower part of the circuit board 7. It should be noted that the conductive parts 7.3 corresponding to the first light-emitting component 7.1 and the second light-emitting component 7.2 are disposed independently of each other.

[0080] To further improve the ease of assembly of the circuit board 7, it is preferable to insert the circuit board 7 into the lower part of the button bracket 3.1. For this purpose, a downward-facing slot 3.2 is provided inside the button bracket 3.1. A locking block 3.4, matching the contour of the circuit board 7, is provided within the slot 3.2. The locking block 3.4 engages with the bottom surface of the circuit board 7 to hold the circuit board 7 within the button bracket 3.1. A positioning rod 3.3 is also provided within the slot 3.2. Correspondingly, the circuit board 7 has limiting holes 7.4 corresponding to the positioning rods 3.3. Multiple positioning rods 3.3 are provided. This method allows the circuit board 7 to be pre-aligned with the slot 3.2 via the positioning rods 3.3, achieving quick, accurate pre-positioning and secure engagement for assembly, forming an independent button module. This modular design facilitates the initial assembly of sub-components and also facilitates the later overall assembly with the switch body, improving production efficiency.

[0081] Combination Figure 2 and Figure 3 As shown, as a further explanation of the cooperation between the button bracket 3.1 and the housing assembly, two vertically arranged pillars 1.1 extend from both sides of the outer surface of the upper housing 1. The pillars 1.1 correspond to the two ends of the button bracket 3.1 and pass through the button bracket 3.1. A limiting part 1.2 is provided on the outer side of the pillar 1.1. The limiting part abuts against the upper surface of the button bracket 3.1, thereby constraining the button bracket 3.1 to move vertically above the upper housing 1. At this time, the conductive spring is kept in a pre-tightened or relaxed state. At least when the button assembly 3 is pressed to the pressed position, the conductive spring provides a restoring force. When the button assembly 3 is pressed to the de-energized position again, the conductive spring can exert an upward restoring force.

[0082] The button assembly 3 also includes a ratchet pressing mechanism 14. The ratchet pressing mechanism 14 is a conventional method in the art and has been widely used in the prior art. Therefore, only a brief explanation of the ratchet pressing mechanism 14 is given here. The upper shell 1 has a ratchet sleeve 14.1 in the middle. The ratchet pressing structure 14 includes a first ratchet 14.2 inserted into the ratchet sleeve 14.1 and a second ratchet 14.3 at the lower part. The first ratchet 14.2 is sleeved on the second ratchet 14.3. A support spring 12.1 is provided inside the second ratchet 14.3. The upper end of the support spring 12.1 abuts against the inside of the second ratchet 14.3, and the lower end of the support spring 12.1 abuts against the movable contact piece 5. The upper end of the first ratchet 14.2 abuts against the button assembly. Component 3 can specifically abut against the circuit board 7 or the button bracket 3.1; when the button assembly 3 is pressed from the initial position, the first ratchet 14.2 and the second ratchet 14.3 move downwards, and at the same time, the support spring 12.1 is pressed against by the second ratchet 14.3 and acts on the moving contact piece 5, thereby causing the moving contact piece 5 to move downwards and contact the stationary contact end. At this time, the first ratchet 14.2 and the second ratchet 14.3 are locked in the ratchet sleeve 14.1, thereby maintaining the pressure on the moving contact piece 5 and maintaining the energized state; The button assembly 3 is reset, causing the first ratchet 14.2 and the second ratchet 14.3 to move downwards again. The second ratchet 14.3 is unlocked under the guidance of the ratchet sleeve 14.1, and then the first ratchet 14.2 and the second ratchet 14.3 are pushed upwards under the action of the support spring 12.1. At this time, the moving contact piece 5 loses its pressing effect and returns to its original position, thereby disengaging from the contact of the stationary contact end.

[0083] (Reset lever 12) Specifically, a reset rod 12 is also provided on the housing assembly. The reset rod 12 and the housing assembly are directly abutted by a support spring 12.1. The reset rod 12 is positioned directly opposite the first contact part 4.2 and is located in the pressing path of the button assembly 3. This allows the pressing action of the button assembly 3 to drive the reset rod 12 downward so that the reset rod 12 can contact the first contact part 4.2 during its downward stroke, thereby achieving a reset pressing action on the first contact part 4.2.

[0084] In case of overload, the first contact portion 4.2 moves toward the button assembly 3 to be actuated by pressing, causing the second contact portion 4.1 to reset to its initial position. This initial position specifically refers to the position where, under normal conditions, the moving contact 5 can be pressed by the button assembly 3 to contact the stationary contact. The reset lever 12 and support spring 12.1 provide the user with a manual reset function. After the overload fault is cleared, the user can press the reset lever 12 to directly act on the bimetallic strip 4 to restore its deformation, thus preparing for re-closing.

[0085] from Figure 4As can be seen, specifically, the reset rod 12 includes a rod-shaped reset part 12.2, which passes through the upper shell 1 and faces the first contact part 4.2. A radially extending locking part 12.3 is provided at the lower end of the reset part 12.2. At this time, the support spring 12.1 abuts against the reset rod 12 and applies an axial force to the reset rod 12, thereby restricting the axial movement of the reset rod 12 and stabilizing the relative position of the reset rod 12 on the housing assembly, so that the locking part 12.3 abuts against the inner top surface of the upper shell 1, thereby maintaining the position of the reset rod 12.

[0086] The present invention also provides an assembly method for an overload warning push-button switch, which, when using the above-mentioned push-button switch, includes the following steps: S1. The button assembly 3 is pre-assembled. The housing component includes an upper shell 1 and a base 2 that are spliced ​​together. The button assembly 3 also includes a ratchet pressing mechanism 14 and a button bracket 3.1 that carries the signal release unit, which are disposed in the upper shell 1. The ratchet pressing mechanism 14 is disposed opposite to the moving contact piece 5. The button bracket 3.1 is fitted onto the support column 1.1 of the upper shell 1. The upper shell 1 is inverted and the ratchet pressing mechanism 14 is placed into the upper shell 1. S2. Insert the conductive spring into the opening of the upper shell 1 and align the conductive spring with the circuit board 7 in the button assembly 3. S3. The first stationary contact piece 13 and the moving contact piece 5 are assembled. A first positioning seat 10 and a second positioning seat 11 are provided inside the upper shell 1. The moving contact piece 5 is placed on the first positioning seat 10 according to its opening outline, and one end of the moving contact piece 5 extends out of the upper shell 1. The first stationary contact piece 13 is placed on the second positioning seat 11 according to its opening outline, and one end of the first stationary contact piece 13 extends out of the upper shell 1. S4. Assemble the first insulating seat 8 and the second insulating seat 9, pre-clamp the overload conductive sheet 6 into the upper shell 1 or the second insulating seat 9, clamp the second insulating seat 9 into the side wall opening on one side of the upper shell 1 and press it onto the first stationary contact sheet 13; clamp the first insulating seat 8 into the side wall opening on the other side of the upper shell 1 and press it onto the fixing piece 5.2 of the moving contact sheet 5 and the end of the overload conductive sheet 6. S5. The bimetallic strip 4 is assembled, and a second stationary contact 4.3 is fixedly provided on the bimetallic strip 4. The second stationary contact 4.3 is arranged in the second groove 8.2 and aligned with the side wall opening of the upper shell 1. Finally, the base 2 is covered on the inverted upper shell 1, and the base 2 is pressed against the side wall opening of the upper shell 1 and constrains the conductive sheet assembly.

[0087] Optionally, in step S4, the overload conductive sheet 6 is engaged between the latches 9.1 of the second insulating seat 9.

[0088] Optionally, in step S4, a positioning post 15.1 is disposed on the mating portion 15 between the upper shell 1 and the base 2. The positioning post 15.1 mates with the positioning hole 6.4 on the overload conductive sheet 6, and the overload conductive sheet 6 is pressed tightly between the upper shell 1 and the base 2. This specific embodiment is merely an explanation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A push-button switch for overload indication, characterized in that, include: A housing assembly, a button assembly (3) movably disposed within the housing assembly, and a conductive sheet assembly disposed within the housing assembly, the housing assembly comprising at least two mating housing members, the conductive sheet assembly comprising: Bimetallic sheet (4), and movable contact (5) and overload conductive sheet (6) spaced apart from bimetallic sheet (4); The bimetallic strip (4) has an initial pose and an overload pose that is deformed relative to the initial pose under overload conditions. The movable contact (5) is opposite to the button assembly (3) and is configured to contact the bimetallic strip (4) in the initial pose to the energized state under pressing action. The bimetallic strip (4) moves away from the movable contact (5) in the overload pose. The overload conductive sheet (6) is disposed in the overload movement path of the bimetallic strip (4) and the overload conductive sheet (6) is connected to the bimetallic strip (4) in the overload pose. It also includes a signal release unit, which is connected to the conductive sheet assembly and releases an energizing signal in the energized state and an overload signal in the overload state.

2. The overload warning button switch according to claim 1, characterized in that: The signal release unit is configured as a first light-emitting component (7.1) and a second light-emitting component (7.2). The first light-emitting component is connected to a moving contact (5), and the second light-emitting component is connected to an overload conductive sheet (6). The signal release unit is integrated into the button assembly (3) or is installed in the application device of the button switch.

3. The overload warning button switch according to claim 2, characterized in that: The conductive sheet assembly further includes a first stationary contact (13), and the signal release unit includes a circuit board (7). The first stationary contact (13), the overload conductive sheet (6), and the moving contact (5) are respectively connected to conductive springs. The conductive springs pass through the housing assembly and are connected to the circuit board (7).

4. The overload warning button switch according to claim 1, characterized in that: The bimetallic strip (4) includes a second contact portion (4.1) and a first contact portion (4.2). The second contact portion (4.1) and the first contact portion (4.2) move with the deformation of the bimetallic strip (4) under overload conditions. The movable contact (5) contacts the second contact portion (4.1) to the energized state under pressing action. The second contact portion (4.1) moves away from the movable contact portion (5) under overload position. The first contact portion (4.2) conducts through the overload conductive sheet (6) under overload position. The overload conductive sheet (6) is provided with a first mating portion (6.1) facing the first contact portion (4.2).

5. The overload warning button switch according to claim 1, characterized in that: The bimetallic strip (4) includes a first contact portion (4.2) disposed opposite to the free end of the movable contact (5). The first contact portion (4.2) moves away from the movable contact (5) and conducts through the overload conductive sheet (6) in an overload position. The overload conductive sheet (6) is provided with a first mating portion (6.1) disposed opposite to the first contact portion (4.2).

6. The overload warning button switch according to claim 1, characterized in that: The overload conductive sheet (6) includes a fixing part (6.5) which is abutted between the mating parts (15) of the housing component.

7. The overload warning button switch according to claim 1, characterized in that: The overload conductive sheet (6) is provided with a positioning hole (6.4), and the housing component is provided with a positioning post (15.1) passing through the positioning hole (6.4).

8. The overload warning button switch according to claim 1, characterized in that: The housing assembly further includes a first insulating seat (8) and a second insulating seat (9) constrained within the housing member and spaced apart from the conductive sheet assembly. The first insulating seat (8) and the second insulating seat (9) are disposed on both sides of the housing assembly about a first direction. The overload conductive sheet (6) is supported across the first insulating seat (8) and the second insulating seat (9), and the overload conductive sheet (6) is disposed on one side of the free end of the moving contact sheet (5) about a second direction perpendicular to the first direction. A third conductive spring (6.3) is connected between the overload conductive sheet (6) and the signal release unit. The third conductive spring (6.3) is arranged between the first insulating seat (8) and the second insulating seat (9).

9. A push-button switch for overload indication according to claim 8, characterized in that: The overload conductive sheet (6) is at least partially engaged with the first insulating seat (8) or the second insulating seat (9); or, the overload conductive sheet (6) is at least partially abutted between the first insulating seat (8) and the housing member; or, the overload conductive sheet (6) is at least partially abutted between the second insulating seat (9) and the housing member.

10. A method for assembling an overload warning push-button switch, applied to the push-button switch of claim 8, characterized in that, Includes the following steps: S1. The button assembly (3) is pre-assembled. The housing component includes an upper shell (1) and a base (2) that are spliced ​​together. The button assembly (3) also includes a ratchet pressing mechanism (14) and a button bracket (3.1) that carries the signal release unit, which are disposed in the upper shell (1). The ratchet pressing mechanism (14) is disposed opposite to the moving contact (5). The button bracket (3.1) is put into the support column (1.1) of the upper shell (1). The upper shell (1) is inverted and the ratchet pressing mechanism (14) is placed into the upper shell (1). S2. Insert the conductive spring into the opening of the upper shell (1) and align the conductive spring with the circuit board (7) in the button assembly (3); S3. The first stationary contact piece (13) and the moving contact piece (5) are assembled. A first positioning seat (10) and a second positioning seat (11) are provided inside the upper shell (1). The moving contact piece (5) is placed on the first positioning seat (10) according to its opening contour, and one end of the moving contact piece (5) extends out of the upper shell (1). The first stationary contact piece (13) is placed on the second positioning seat (11) according to its opening contour, and one end of the first stationary contact piece (13) extends out of the upper shell (1). S4. Assemble the first insulating seat (8) and the second insulating seat (9), pre-clamp the overload conductive sheet (6) onto the upper shell (1) or the second insulating seat (9), clamp the second insulating seat (9) into the side wall opening on one side of the upper shell (1) and press it onto the first stationary contact sheet (13); clamp the first insulating seat (8) into the side wall opening on the other side of the upper shell (1) and press it onto the fixing piece (5.2) of the moving contact sheet (5) and the end of the overload conductive sheet (6); S5. The bimetallic strip (4) is assembled. A second stationary contact (4.3) is also fixed on the bimetallic strip (4). The second stationary contact (4.3) is arranged on the first insulating base and the second stationary contact (4.3) is aligned with the side wall opening of the upper shell (1). Finally, the base (2) is covered on the inverted upper shell (1). The base (2) is pressed against the side wall opening of the upper shell (1) and constrains the conductive sheet assembly.

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