Key switch with lamp

Abstract

The utility model discloses a key switch with a lamp, and belongs to the technical field of key switches. The key switch with the lamp comprises a shell and a ratchet wheel key assembly arranged on the shell. The key switch with the lamp further comprises an elastic contact piece, one end of the elastic contact piece is installed on the shell, the other end of the elastic contact piece is provided with a contact part, and the contact part abuts against the ratchet wheel key assembly. The first end of the bimetallic strip is installed on the shell, and the second end of the bimetallic strip is provided with a static contact which is separably connected with the contact part; the reset linkage piece is rotationally arranged on the shell, the reset linkage piece is provided with a connecting arm and a reset arm, the connecting arm is used for being connected with the contact part, and the reset arm is used for being connected with the second end of the bimetallic strip; and the indicating lamp assembly is provided with a first power supply connector and a second power supply connector, and the first power supply connector is electrically connected with the elastic contact piece. The key switch with the lamp is convenient, safe and reliable to use.

Description

Technical Field

[0001] This application belongs to the technical field of push-button switches, and particularly relates to a push-button switch with a light. Background Art

[0002] A push-button switch with a light is a convenient switch in a form of pressing for opening and closing. It realizes conduction or cut-off through pressing, with convenient operation and stable and reliable on-off states. And by configuring a light on the internal circuit of the push-button switch, it is used to indicate the current on-off state of the switch, thus facilitating use. The push-button switch includes a ratchet button assembly, a moving contact piece, and a static contact piece. The moving contact piece and the static contact piece are cooperatively arranged in the housing, and the moving contact piece can elastically deform to contact and connect with the static contact piece or disconnect from the static contact piece. One end of the ratchet assembly abuts against the moving contact piece to drive the moving contact piece to deform and move, and can use the self-locking function of the ratchet assembly to maintain the current position to lock the position of the moving contact piece and keep the connection or disconnection state between the moving contact piece and the static contact piece.

[0003] During actual use, the functions of the push-button switch are single, and it can only realize the switching of mechanical on-off states. It does not have an overload protection function, has certain safety risks, and the switch functions are unreliable. Summary of the Invention

[0004] This application provides an overload protection switch, aiming to at least solve the technical problems of high overload safety risks and unreliable switch functions of the push-button switch to a certain extent. For this purpose,

[0005] An embodiment of this application provides a push-button switch with a light, including a housing and a ratchet button assembly arranged on the housing; the push-button switch with a light further includes:

[0006] An elastic contact piece, with one end installed on the housing and the other end provided with a contact part. The contact part abuts against the ratchet button assembly, and the contact part moves under the drive of the ratchet button assembly;

[0007] A bimetallic strip, with the first end installed on the housing. The second end of the bimetallic strip is provided with a static contact point that can be detachably connected to the contact part. When the bimetallic strip undergoes overload deformation, the second end of the bimetallic strip deforms and displaces, so that the static contact point moves away from the contact part;

[0008] A reset linkage, rotatably arranged on the housing. The reset linkage has a connecting arm and a reset arm. The connecting arm is used to connect the contact part, and the reset arm is used to connect the second end of the bimetallic strip;

[0009] An indicator light assembly, having a first power supply connector and a second power supply connector. The first power supply connector is electrically connected to the elastic contact piece.

[0010] In some embodiments, the indicator light assembly includes an indicator light circuit, and two power supply terminals of the indicator light circuit are respectively connected to the first power supply connector and the second power supply connector.

[0011] In some embodiments, the illuminated push-button switch further includes a pressing seat, the housing is connected to the pressing end of the ratchet button assembly, and the indicator light circuit is arranged in the pressing seat.

[0012] In some embodiments, the first power supply connector includes a first conductive spring, and two ends of the first conductive spring respectively abut against the power supply terminal of the indicator light circuit and the elastic contact piece.

[0013] In some embodiments, the indicator light circuit is an indicator light circuit board, and the indicator light circuit board is arranged in the pressing seat.

[0014] In some embodiments, limiting bosses are respectively arranged on the power supply terminal and the elastic contact piece, and two ends of the first conductive spring are respectively sleeved on the limiting bosses.

[0015] In some embodiments, a guiding column is arranged on the housing, a guiding hole is arranged on the pressing seat, the guiding column is embedded in the guiding hole, and the axial direction of the guiding column is set as the pressing direction of the ratchet button assembly.

[0016] In some embodiments, a hook portion is arranged on the connecting arm, a hanging arm is arranged on the contact portion, and the hanging arm is in fit and lap joint with the hook portion.

[0017] In some embodiments, the reset linkage includes a rotating shaft, the connecting arm and the reset arm are arranged on the circumferential side surface of the rotating shaft, and two ends of the rotating shaft are rotatably connected to the housing.

[0018] In some embodiments, the rotating shaft and the elastic contact piece are located on the same side of the plate surface of the bimetallic strip, and the rotating shaft straddles the second end of the bimetallic strip along the width direction of the bimetallic strip, wherein the orthogonal direction of the connection line between the first end and the second end of the bimetallic strip is the width direction of the bimetallic strip.

[0019] The embodiments of the present application at least have the following beneficial effects:

[0020] The illuminated push-button switch provided by the embodiment of the present application includes a housing, and a ratchet button assembly, an elastic contact piece, a bimetallic strip, a reset linkage, and an indicator light assembly arranged inside the housing. The first end of the elastic contact piece is installed inside the housing, and the contact part of the second end of the elastic contact piece abuts against one end of the ratchet button assembly and can deform and move under the drive of the ratchet button assembly. The first end of the bimetallic strip is installed inside the housing, and a static contact is arranged at the second end of the bimetallic strip to cooperate with connecting or disconnecting the contact part of the second end of the elastic contact piece to realize the function of the push-button switch. And one of the two power connectors of the indicator light assembly is connected to the elastic contact piece, so that when the elastic contact piece is powered on, the indicator light assembly can be powered to indicate the current on-off situation. Utilizing the characteristic that the bimetallic strip deforms due to overload, the static contact located at the second end of the bimetallic strip can deform and move following the second end of the bimetallic strip to disconnect the electrical connection with the elastic contact piece, thereby realizing overload power-off protection. At the same time, the reset linkage is rotatably arranged on the housing, and a connecting arm and a reset arm are arranged on the reset linkage. Thus, the reset arm deflects following the rotation of the reset linkage. The connecting arm of the reset linkage is connected to the contact part of the elastic contact piece, and the movement track of the reset arm intersects with the track of the overload deformation and displacement of the second end of the bimetallic strip, that is, the reset arm is arranged on the overload deformation and displacement track of the bimetallic strip. Thus, when the bimetallic strip is overloaded and deformed, its second end deforms and displaces and approaches or even abuts against the reset arm. At this time, the contact part can be displaced by pressing the ratchet button assembly, so that the reset linkage is driven to rotate through the connecting arm, so that the reset arm deflects, and thus the second end of the bimetallic strip is pushed along the direction opposite to the overload deformation and displacement direction of the second end of the bimetallic strip, forcing it to move back to its original position, thereby realizing the reset of the shape and position of the bimetallic strip after overload to ensure the functional reliability of the switch structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Fig. shows an exploded structural schematic diagram of the illuminated push-button switch in the embodiment of the present application;

[0023] Figure 2 Fig. shows Figure 1 the assembled state schematic diagram of the illuminated push-button switch in

[0024] Figure 3 Fig. showsFigure 1 Schematic diagram of the internal functional mechanism of the illuminated push-button switch in

[0025] Figure 4 shows Figure 1 Schematic diagram of the assembled state of the elastic contact piece, bimetallic piece and reset linkage of the illuminated push-button switch in

[0026] Figure 5 shows Figure 3 Schematic diagram of the off state structure of the illuminated push-button switch in

[0027] Figure 6 shows Figure 3 Schematic diagram of the on state structure of the illuminated push-button switch in

[0028] Figure 7 shows Figure 3 Schematic diagram of the overload state structure of the illuminated push-button switch in Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0031] The present application will be described below in conjunction with the accompanying drawings and with reference to specific embodiments:

[0032] In the illuminated push-button switch, there are configured an elastically movable contact piece and a static contact piece that can be detachably connected. The elastically movable contact piece is connected to the ratchet button assembly. By pressing the ratchet button assembly, the elastically movable contact piece can be driven to approach and connect or disconnect and move away from the static contact piece to achieve the switch function, and through the self-locking function of the ratchet button assembly, the connected and disconnected states are maintained. And the indicator light assembly is connected to the elastic contact piece to reflect whether the switch is on or off at present. However, with the diversification of electrical appliance types, the situation of overloading of electricity consumption is likely to occur. For this reason, it is necessary to configure an overload protection function for the illuminated push-button switch to improve the safety of electricity consumption and the reliability of the switch function.

[0033] To this end, an embodiment of the present application provides a backlit push-button switch, aiming to add an overload protection function and a reset function through structural design, and improve the use safety and functional reliability of the backlit push-button switch to a certain extent.

[0034] Figure 1 FIG. 4 shows an exploded structural schematic diagram of the backlit push-button switch in an embodiment of the present application; Figure 2 FIG. Figure 1 shows the schematic assembly state diagram of the backlit push-button switch in FIG. Figure 3 FIG. Figure 1 shows the structural schematic diagram of the internal functional mechanism of the backlit push-button switch in FIG. Figure 4 FIG. Figure 1 shows the schematic assembly state diagram of the elastic contact piece, the bimetallic strip and the reset linkage of the backlit push-button switch in FIG. Figure 5 FIG. Figure 3 shows the structural schematic diagram of the off state of the backlit push-button switch in FIG. Figure 6 FIG. Figure 3 shows the structural schematic diagram of the on state of the backlit push-button switch in FIG. Figure 7 FIG. Figure 3 shows the structural schematic diagram of the overload state of the backlit push-button switch in FIG.

[0035] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , in some embodiments, the backlit push-button switch may be configured with a bimetallic strip having an overload deformation function as an overload sensitive element to track the overload state, and achieve an open circuit protection function through overload deformation and displacement, and a reset structure is configured to achieve the attitude and position reset of the bimetallic strip after power-off to ensure the stability and reliability of the switch function.

[0036] The backlit push-button switch may include a housing 1 and a ratchet button assembly 2, an elastic contact piece 3, a bimetallic strip 4 and a reset linkage 5 provided on the housing 1; the elastic contact piece 3 is detachably cooperatively connected with the bimetallic strip 4, and the ratchet button assembly 2 is connected to the elastic contact piece 3. By pressing the ratchet button assembly 2, the free end of the elastic contact piece 3 is driven to approach or move away from the connection with the bimetallic strip 4 to achieve the on-off function of the switch; and when overloaded, the connection between the bimetallic strip 4 and the elastic contact piece 3 can be disconnected by using the deformation and displacement of the bimetallic strip 4 to achieve overload open circuit protection.

[0037] The reset linkage 5 is connected to the free end of the elastic contact piece 3 and is arranged in a matching manner with the position of the bimetallic strip 4. After the bimetallic strip 4 is deformed and displaced due to overload, by pressing the ratchet button assembly 2, the free end of the elastic contact piece 3 can be displaced, driving the reset linkage 5 to act, forcing the bimetallic strip 4 to reset to the position and posture before overload, and ensuring the reliability of the switch function.

[0038] Specifically, the housing 1 is the bearing foundation of the entire backlit push-button switch, used to accommodate or install other functional components such as the ratchet button assembly 2, the elastic contact piece 3, the bimetallic strip 4, the reset linkage 5, and the indicator light assembly 7. The housing 1 can also be used as the installation foundation of the backlit push-button switch and can be configured to be installed on other product structures. For example, the housing 1 can be installed on various electrical devices such as power strips.

[0039] The ratchet button assembly 2 is arranged on the housing 1 and can extend or shorten along the pressing direction and maintain the state and position after pressing, so as to cooperate with pressing the elastic contact piece 3 to switch it between two positions and maintain the switched position, so as to realize the switching of the connection and separation states between the elastic contact piece 3 and the bimetallic strip 4 and maintain the switched state. Generally, the ratchet button assembly 2 may include an upper ratchet 21, a lower ratchet 22, and a ratchet spring 23 sleeved in sequence. A ratchet seat 13 adapted to the upper ratchet 21 is provided on the housing 1 for guiding the stable up and down movement of the upper ratchet 21. The teeth of the upper ratchet 21 and the lower ratchet 22 are engaged. The two ends of the ratchet spring 23 are elastically abutted against the lower ratchet 22 and the elastic contact piece 3. By pressing the upper ratchet 21, the lower ratchet 22 can be moved downward and maintained at the current position, or by pressing the upper ratchet 21, the lower ratchet 22 can be moved upward to reset and maintain the current position, thereby realizing the switching between the upper and lower two positions and realizing the function of the switch button.

[0040] The elastic contact piece 3 is a conductive contact piece and can be deformed and displaced to a certain extent. The first end of the elastic contact piece 3 is a fixed end 31, which can be installed and fixed in the housing 1. The second end of the elastic contact piece 3 is a free end 32, and the free end 32 can move under the action of an external force. A contact portion 32a can be provided at the free end 32 of the elastic contact piece 3 for contacting and connecting the bimetallic strip 4 to realize electrical connection. The contact portion 32a can also be abutted against the ratchet button assembly 2 to move under the pushing of the ratchet button assembly 2. Generally, the ratchet spring 23 can be abutted against the contact portion 32a.

[0041] The bimetal 4 is an electrical connection component. The first end 41 of the bimetal 4 is installed in the housing 1. The second end 42 of the bimetal 4 is provided with a static contact 42a, and the static contact 4a can be electrically connected or disconnected from the elastic contact piece 3. Among them, the bimetal 4 has an overload deformation function. As an overload-sensitive component, it can track the power consumption situation. When the bimetal 4 is overloaded, a large amount of heat will be generated, causing the bimetal 4 to deform in a set direction, and the deformation will accumulate at the second end 42 of the bimetal 4, causing a large deformation and displacement at the second end 42 of the bimetal 4. The static contact 42a will also be greatly displaced, so as to disconnect the connection with the contact portion 32a, thereby realizing the overload protection open-circuit function.

[0042] The reset linkage 5 is a component for driving the bimetal 4 after overload deformation to reset. It can be set as a linkage with a cylinder rod principle, and is connected between the free end 32 of the elastic contact piece 3 and the second end 42 of the bimetal 4, so as to follow the movement of the elastic contact piece 3 after overload, and thus drive the second end 42 of the bimetal 4 to deform and reset. The reset linkage 5 is rotatably arranged on the housing 1, and the reset linkage 5 has a connecting arm 51 and a reset arm 52. The connecting arm 51 is used to connect the connecting portion 32a, and the reset arm 52 is used to connect the second end 42 of the bimetal 4. Thus, when the bimetal 4 is overloaded and deformed, the second end 42 of the bimetal 42 will move towards the reset arm 52, or move together with the reset arm 52.

[0043] It should be noted that the bimetal 4 has a conventional position and posture, that is, a preset switch working position, to ensure that the static contact 42a on the bimetal 4 can cooperate with the contact portion 32a of the elastic contact piece 3 to maintain a stable electrical connection state or a disconnected state, thereby realizing a stable and reliable switch function. However, when an overload condition occurs in the state where the contact portion 32a is electrically connected to the static contact 42a, the bimetal 4 will undergo high-temperature deformation, so that the static contact 42a moves away from the contact portion 32a at the current position and leaves the preset switch working position to disconnect the circuit and realize the overload open-circuit protection function.

[0044] When reset is required, after the bimetal 4 is deformed due to overload by multiple fingers, in order to restore the switching function of the illuminated push-button switch, that is, the stationary contact 42a is reset to the preset switching working position; the free end 32 of the elastic contact piece 3 can be driven to move by pressing the ratchet button assembly 2, and at the same time, the connecting arm 51 is driven to move, thereby driving the reset linkage 5 to rotate, so as to drive the reset arm 52 to move the second end 42 of the bimetal 42, so that the second end 42 of the bimetal 4 can move in the direction opposite to the overload deformation direction of the second end 42 of the bimetal 42, and finally reset to the position and posture before the overload deformation, so as to restore the cooperative switching function between the bimetal 4 and the elastic contact piece 3 and improve the reliability of the switching function.

[0045] On the other hand, when pressing the ratchet button assembly 2 to reset the bimetal 4, the position of the contact portion 32a of the elastic contact piece 3 is also switched, that is, it is moved away from the conduction working position and returns to the open circuit working position, so as to avoid the risks of electric shock or re-overload when the circuit is instantaneously conducted after the bimetal 4 is reset, and ensure the electrical safety after reset. At the same time, through structural design, integrating the pressing switch to switch the switch state and the reset operation into one pressing operation also simplifies the reset operation to a certain extent and improves the operation convenience.

[0046] The indicator light assembly 7 is used for electrically connecting to the elastic contact piece 3 and serves as an indicator component for indicating whether the switch circuit is conducted or not. Obviously, the indicator light assembly should have an indicator light 71, and usually be configured with a first power supply connector 72 and a second power supply connector 73, which are connected to the two power supply ends of the indicator light 71 to achieve electrical connection.

[0047] Generally speaking, the first power supply connector 72 can be electrically connected to the elastic contact piece 3 as one power supply end; the second power supply connector 73 can be externally connected to another power supply end.

[0048] The illuminated push-button switch provided by the embodiment of the present application includes a housing and a ratchet button assembly, an elastic contact piece, a bimetal piece, a reset linkage, and an indicator light assembly disposed in the housing. The first end of the elastic contact piece is installed in the housing, and the contact portion of the second end of the elastic contact piece abuts against one end of the ratchet button assembly and can be deformed and moved under the drive of the ratchet button assembly. The first end of the bimetal piece is installed in the housing, and a static contact is provided at the second end of the bimetal piece to cooperate with connecting or disconnecting the contact portion of the second end of the elastic contact piece to realize the function of the push-button switch. One of the two power connectors of the indicator light assembly is connected to the elastic contact piece, so that when the elastic contact piece is energized, power can be supplied to the indicator light assembly to indicate the current on-off situation. By utilizing the characteristic of the bimetal piece deforming under overload, the static contact at the second end of the bimetal piece can move following the deformation of the second end of the bimetal piece to disconnect the electrical connection with the elastic contact piece, thereby realizing overload power-off protection. At the same time, the reset linkage is rotatably disposed on the housing, and a connecting arm and a reset arm are provided on the reset linkage. Thus, the reset arm deflects following the rotation of the reset linkage. The connecting arm of the reset linkage is connected to the contact portion of the elastic contact piece, and the movement track of the reset arm intersects with the track of the overload deformation and displacement of the second end of the bimetal piece, that is, the reset arm is disposed on the track of the overload deformation and displacement of the second end of the bimetal piece. Therefore, when the bimetal piece is overloaded and deformed, its second end deforms and displaces and approaches and even abuts against the reset arm. At this time, the contact portion can be displaced by pressing the ratchet button assembly, thereby driving the reset linkage to rotate through the connecting arm, so that the reset arm deflects, and thus pushes against the second end of the bimetal piece along the direction opposite to the overload deformation and displacement direction of the second end of the bimetal piece, forcing it to move and reset, so as to realize the reset of the shape and position of the bimetal piece after overload and ensure the functional reliability of the switch structure.

[0049] In some embodiments, the indicator light 71 in the indicator light assembly 7 can be set as an integrated indicator light circuit 71a to facilitate installation, improve installation efficiency, and improve the stability of the electrical connection of the indicator light circuit.

[0050] Correspondingly, the first power connector 72 and the second power connector 73 can be electrically connected to the corresponding power supply terminals of the indicator light circuit 71a.

[0051] In some embodiments, in order to improve the installation stability of the indicator light circuit 71a, a movable pressing seat 74 can be provided on the housing 1. The pressing seat 74 is connected to the pressing end of the upper ratchet 21 of the ratchet button assembly 2, and the indicator light circuit 71a can be disposed in the pressing seat 74.

[0052] In some embodiments, in order to improve the stability of the moving posture of the pressing seat 74, a guiding post 14 may be provided on the housing 1, a guiding hole 74a is formed on the pressing seat 74, and the guiding post 14 is movably inserted into the guiding hole 74a.

[0053] Generally, the axial direction of the guiding post 14 is set as the pressing direction of the ratchet button assembly 2.

[0054] In some embodiments, the first power connector 72 may be set as a first conductive spring 72a, and two ends of the first conductive spring 72a respectively abut against the contact portion 32a of the elastic contact piece 3 and the power supply end of the indicator light circuit 71a.

[0055] In some embodiments, in order to stabilize the first conductive spring 72a, a limiting boss may be provided at the power supply end of the indicator light circuit 71a, so that the first conductive spring 72a is sleeved on the limiting boss to achieve radial limiting.

[0056] In some embodiments, the indicator light circuit 71a is set as a solid-state circuit in the form of an integrated circuit board.

[0057] In some embodiments, a wiring head 8 may further be arranged on the housing 1 for stably connecting the second power connector 73, and the wiring head 8 can be connected to an external power supply end.

[0058] In some embodiments, the second power connector 73 may also be set as a second conductive spring 73a, and two ends of the second conductive spring 73a respectively abut against the wiring head 8 and the power supply end of the indicator light circuit 71a.

[0059] Moreover, the first conductive spring 72a and the second conductive spring 73a can be symmetrically arranged with respect to the ratchet button assembly 2 to balance the force.

[0060] In some embodiments, a through hole 43 penetrating the bimetallic strip 4 is formed in the bimetallic strip 4 along the thickness direction, and an extension arm 44 extending into the through hole 43 is provided at the second end 42 of the bimetallic strip 4, and the static contact 42a can be arranged at the free end of the extension arm 44, that is, the end portion located in the through hole 43, so that when the bimetallic strip 4 is deformed due to overload, the moving direction of the static contact 42a is opposite to the moving direction of the second end 42 of the bimetallic strip 4.

[0061] That is to say, when the bimetallic strip 4 is deformed due to overload, the static contact 42a moves away from the contact portion 32a following the extension arm 44, and the second end 42 of the bimetallic strip 4 moves closer to the contact portion 32a, thereby realizing the overload power-off function.

[0062] Accordingly, by pressing the ratchet button assembly 2, the free end 32 of the elastic contact piece 3 can be moved, so as to guide the reset linkage 5 to rotate through the connecting arm 51, so that the reset arm 52 deflects synchronously, so as to drive the second end 42 of the bimetal piece 4 to move and finally reset, so that the static contact 42a follows the extension arm 44 to move in the direction close to the contact part 32a, and finally resets to the preset switch working position.

[0063] It should be noted that the overload condition occurs when the contact part 32a is connected and energized with the static contact 42a. At this time, both the ratchet button assembly 2 and the elastic contact piece 3 are in the on working position of the backlit button switch; for overload reset, it is usually necessary to press the ratchet button assembly 2, so that the free end 32 of the elastic contact piece 3 and the ratchet button assembly 2 move to the off working position of the backlit button switch, that is, the position where the free end 32 of the elastic contact piece 3 is far away from the static contact 42a of the bimetal piece 4, which is the pressing stroke of closing the backlit button switch in the general understanding.

[0064] Through the position cooperation of the reset linkage 5 with the elastic moving contact piece 3 and the bimetal piece 4, the reset operation of the bimetal piece 4 is integrated into the off operation of the ratchet button assembly 2, which can greatly improve the reset operation efficiency. That is to say, there is no need to perform an additional reset operation, because pressing the ratchet button assembly 2 after overload to prompt the contact part 32a to leave the matching position with the static contact piece 42a is a necessary safety operation; by integrating the reset operation of the bimetal piece into the off operation of the ratchet button assembly 2, the operation can be simplified and the operation convenience can be improved.

[0065] In some embodiments, in order to enable the reset linkage 5 to deflect synchronously and drive the second end 42 of the bimetal piece 4 to move and reset during the process that the contact part 32a of the elastic contact piece 3 moves away from the static contact 42a of the bimetal piece 4, the reset linkage 5 can be set as a lever principle mechanism, and the connecting arm is moved by the contact part 32a, so as to drive the reset linkage 5 to deflect, so that the reset arm 52 moves the second end 42 of the bimetal piece 4.

[0066] Specifically, the reset linkage 5 may include a rotating shaft 53, and the rotating shaft 53 is rotatably connected to the housing 1 as the action fulcrum of the reset linkage 5; the connecting arm 51 and the reset arm 42 may be respectively arranged on the rotating shaft 53 and rotate together with the rotating shaft 53, so as to form a reset linkage mechanism similar to a lever.

[0067] That is, when the connecting arm 51 is driven by the contact portion 32a, it will rotate about the rotating shaft 53 and drive the rotating shaft 5 to rotate. Correspondingly, the reset arm 52 will also rotate about the rotating shaft 53 driven by the rotating shaft 53, so as to be able to move the second end 42 of the bimetal 4, so that the static contact 42a moves and resets.

[0068] In some embodiments, in order to reduce the structural complexity of the reset linkage 5, the connecting arm 51 and the reset arm 52 can be arranged on the circumferential side surface of the rotating shaft 53, so that the rotational angular velocities of the connecting arm 51 and the reset arm 52 are equal, and the reset operation stroke is substantially equivalent to the moving stroke of the free end 32 of the elastic contact piece 3, so that the specification grading design of the connecting arm 51 and the reset arm 52 can be simplified.

[0069] In some embodiments, in order to reduce the installation space requirement, the rotating shaft 53 and the contact portion 32a of the elastic contact piece 3 can be arranged on the same side of the plate surface of the bimetal 4.

[0070] Generally speaking, the rotating shaft 53 can be arranged across one side of the bimetal 4 along the width direction of the bimetal 4. The width direction of the bimetal 4 is the orthogonal direction of the line connecting the first end 41 and the second end 42 of the bimetal 4, and the length direction of the bimetal 4 is the line connecting direction of the first end 41 and the second end 42 of the bimetal 4.

[0071] Correspondingly, in the length direction of the bimetal 4, the connecting arm 51 and the reset arm 52 are located on both sides of the rotating shaft 53, so that the deflection directions of the connecting arm 51 and the reset arm 52 will be in the length direction of the bimetal 4, so as to be able to limit the overall length of the backlit button switch to a certain extent.

[0072] In some embodiments, both ends of the rotating shaft 53 are rotatably connected in the housing 1. Correspondingly, the connecting arm 51 and the reset arm 52 can be arranged in the middle area of the rotating shaft 53.

[0073] Generally speaking, in order to simplify the structure, the rotating shaft 53 can be arranged as a rod, and both ends of the rotating shaft 53 are arranged as cylinders, so as to realize smooth rotation.

[0074] In some embodiments, in order to reduce the interference risk between the reset linkage 5 and the contact portion 32a and to take into account the reliability of the reset linkage 5 and the contact portion 32a, the connecting arm 51 can be lapped on the contact portion 32a. During the process of the contact portion 32a moving away from the stationary contact 42a of the bimetal 4, the contact portion 32a drives the connecting arm 51 to move away from the bimetal 4.

[0075] On the other hand, during the process of the contact portion 32a approaching the bimetal 4, the connecting arm 51 may not move synchronously with the contact portion 32a, that is, the contact portion 32a does not drive the connecting arm 51 to move, and correspondingly, the reset linkage 5 will not rotate.

[0076] Therefore, in order to match the reset operation, the reset arm 52 can be arranged on the side where the second end of the bimetal 4 is deformed and bent, and a certain distance is maintained; thus, when the bimetal 4 is overloaded and deformed, the second end 42 of the bimetal 4 will move towards the reset arm 52, and even abut and push the reset arm 52 to move, so that when the free end 32 of the elastic contact piece 3 moves away from the bimetal 4, the reset linkage 5 can be pushed to act relatively quickly, realizing efficient and stable reset.

[0077] In some embodiments, in order to improve the connection reliability between the connecting arm 51 and the contact portion 32a, a hook portion 51a can be arranged on the connecting arm 51 for adaptively lapping on the contact portion 32a.

[0078] Generally, the hook portion 51a can be lapped on the side of the contact portion 32a away from the bimetal 4, so that during the process of the contact portion 32a moving away from the bimetal 4, that is, during the stroke of turning off the lighted push-button switch, the hook portion 51a can stably lap on the contact portion 32a and move away from the bimetal 4 following the contact portion 32a.

[0079] In other embodiments, the connecting arm 51 can also be directly connected to the contact portion 32a, and various connection methods such as clamping and bonding can be adopted.

[0080] In some embodiments, in order to facilitate the connection of the hook portion 51a, a hanging arm 32b can be arranged on one side of the contact portion 32a for adaptively hooking the hook portion 51a.

[0081] In some embodiments, the reset arm 52 and the second end 42 of the bimetal 4 can be in a non-fixed connection form, such as relatively open forms like lapping and abutting, or a certain gap is maintained.

[0082] That is, the reset arm 52 is located on the deformed and bent side of the second end 42 of the bimetal sheet 4. When the reset linkage 5 moves following the free end 32, the reset arm 52 pushes against the second end 42 of the bimetal sheet 4 to move it back to its original position.

[0083] In some embodiments, the reset arm 52 can be configured as a block-shaped member with a contact surface adapted to the second end 42 of the bimetal sheet 4 for contacting and pushing against the bimetal sheet 4.

[0084] In some embodiments, the bimetal sheet 4 can also be of other forms, but the basic principle is the same. Under an overload condition, the bimetal sheet 4 will deform and shift in a set direction. According to the deformation and shifting direction of the second end of the bimetal sheet 4, the reset linkage 5 can be arranged accordingly so that during the process of driving the contact portion 32a to shift by pressing the ratchet button assembly 2, the reset linkage 5 is synchronously driven to rotate to push and reset the second end 42 of the bimetal sheet 4.

[0085] For example, the bimetal sheet 4 can be configured as an integral sheet-like member, with one end fixed inside the housing 1 and the other end being a free end. The static contact 42a is fixed on the free end of the bimetal sheet 4 and can move following the free end of the bimetal sheet 4, approaching or departing from the contact portion 32a. At this time, the moving direction of the static contact 42a is the same as that of the free end of the bimetal sheet 4.

[0086] When the bimetal sheet 4 is overloaded, the second end of the bimetal sheet 4 and the static contact 42a move away from the contact portion 32a, and the reset arm 52 can be linked to pull the second end of the bimetal sheet 4 closer to the contact portion 32a.

[0087] Generally, the reset arm 52 can be arranged on the side of the bimetal sheet 4 away from the contact portion 32a, and in the length direction of the bimetal sheet 4, the reset arm 52 and the connecting arm 51 are on the same side of the rotating shaft 53. Thus, when the connecting arm 51 follows the contact portion 32a to move away from the bimetal sheet 4, the reset arm 52 pushes the second end 42 of the bimetal sheet 4 to move back in the direction of the contact portion 32a, ultimately driving the static contact 42a to reset.

[0088] In some embodiments, the elastic contact piece 3 and the reset linkage 5 can be arranged at intervals along the length direction of the bimetal sheet 4. For example, the fixed end 31 of the elastic contact piece 3 can be fixed on one side of the first end 41 of the bimetal sheet 4, the free end 32 of the elastic contact piece 3 is suspended in the middle of the bimetal sheet 4, and the reset linkage 5 is located on one side of the second end 42 of the bimetal sheet 4.

[0089] In some embodiments, in order to reduce the length of the illuminated button switch, the elastic contact piece 3 may be disposed on one side in the width direction of the bimetallic strip 4, that is, the fixed end 31 of the elastic contact piece 3 is disposed on the side in the orthogonal direction of the connection line between the first end 41 and the second end 42 of the bimetallic strip 4, and the free end 32 may extend to the middle of the bimetallic strip 4 and be oppositely disposed in matching with the static contact point 42a.

[0090] In some embodiments, in order to facilitate external connection to other structures, a conductive contact piece 45 may be connected to the first end 41 of the bimetallic strip 4.

[0091] In some embodiments, the housing 1 may be provided as a snap-fit base 11 and an upper cover 12 to facilitate installation.

[0092] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0093] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0094] It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. In the present application, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise clearly and specifically limited.

[0095] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0096] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0097] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principle and purpose of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A lighted push-button switch, comprising a housing and a ratchet push-button assembly disposed on the housing; characterized in that, The illuminated push-button switch further includes: A resilient contact piece, one end of which is mounted on the housing, and the other end is provided with a contact portion that abuts against the ratchet button assembly, and the contact portion moves under the drive of the ratchet button assembly; A bimetallic strip, the first end of which is mounted on the housing, and the second end of the bimetallic strip is provided with a stationary contact that can be detachably connected to the contact portion. When the bimetallic strip is deformed due to overload, the second end of the bimetallic strip is deformed and displaced so that the stationary contact moves away from the contact portion; A reset linkage member rotatably provided on the housing, the reset linkage member having a connecting arm and a reset arm, the connecting arm being used to connect the contact portion, and the reset arm being used to connect the second end of the bimetallic strip; An indicator light assembly having a first power connector and a second power connector, the first power connector being electrically connected to the resilient contact piece.

2. The lighted push-button switch according to claim 1, wherein The indicator light assembly includes an indicator light circuit, and two power terminals of the indicator light circuit are respectively connected to the first power connector and the second power connector.

3. The lighted push-button switch according to claim 2, wherein The illuminated push-button switch further includes a pressing seat, the housing is connected to the pressing end of the ratchet button assembly, and the indicator light circuit is arranged in the pressing seat.

4. The illuminated push-button switch according to claim 3, wherein The first power connector includes a first conductive spring, and two ends of the first conductive spring respectively abut against the power terminal of the indicator light circuit and the resilient contact piece.

5. The illuminated push-button switch according to claim 4, wherein, The indicator light circuit is an indicator light circuit board arranged in the pressing seat.

6. The illuminated push-button switch according to claim 5, characterized in that, Limiting bosses are respectively arranged on the power terminal and the resilient contact piece, and two ends of the first conductive spring are respectively sleeved on the limiting bosses.

7. The illuminated push-button switch according to claim 3, characterized in that, A guiding post is arranged on the housing, a guiding hole is arranged on the pressing seat, the guiding post is embedded in the guiding hole, and the axial direction of the guiding post is the pressing direction of the ratchet button assembly.

8. The illuminated push-button switch according to any one of claims 1 to 7, characterized in that, A hook portion is arranged on the connecting arm, a hanging arm is arranged on the contact portion, and the hanging arm is cooperatively lapped with the hook portion.

9. The illuminated push-button switch according to claim 8, wherein, The reset linkage member includes a rotating shaft, the connecting arm and the reset arm are arranged on the circumferential side surface of the rotating shaft, and two ends of the rotating shaft are rotatably connected to the housing.

10. The illuminated push-button switch according to claim 9, characterized in that, The rotating shaft and the resilient contact piece are located on the same side of the plate surface of the bimetallic strip, and the rotating shaft straddles the second end of the bimetallic strip along the width direction of the bimetallic strip, wherein the orthogonal direction of the connection line between the first end and the second end of the bimetallic strip is the width direction of the bimetallic strip.

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