Wiring terminal type key switch

Abstract

The utility model discloses a wiring terminal type key switch, and belongs to the technical field of switches. The wiring terminal type key switch comprises a shell, and a ratchet wheel key assembly, a bimetallic strip, an elastic contact piece, a reset linkage piece, a first wiring terminal, a second wiring terminal and an indicating lamp assembly which are arranged in the shell, 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; the first wiring terminal is connected with the bimetallic strip; and the indicating lamp assembly is provided with a first power supply connector and a second power supply connector, the first power supply connector is electrically connected with the elastic contact piece, and the second power supply connector is electrically connected with the second wiring terminal. The wiring terminal type key switch provided by the utility model is convenient to install and wide in application range.

Description

Technical Field

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

[0002] A push-button switch is a convenient switch in the form of pressing for opening and closing. It realizes conduction or cut-off by pressing, with convenient operation and stable and reliable on-off states. 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 arranged in cooperation in a housing, and the moving contact piece can elastically deform to contact and connect 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 utilize 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 the actual assembly and use process, the push-button switch needs to be connected to an external power supply terminal through conductive components such as wires, making the installation operation very inconvenient; and in a push-button switch configured with electrical components, a power supply terminal required for the electrical components also needs to be additionally installed, further increasing the complexity of the assembly operation and resulting in low assembly efficiency; it also reduces the applicable range of the push-button switch to a certain extent; on the other hand, the safety of the push-button switch is not high, and there is an easy risk of overload and burnout. Summary of the Invention

[0004] This application provides a push-button switch of terminal type, aiming to at least solve the technical problems of high overload safety risk, inconvenient installation and use, and limited applicable range of the push-button switch to a certain extent. For this purpose,

[0005] An embodiment of this application provides a push-button switch of terminal type, including a housing and a ratchet button assembly, a bimetal sheet and an elastic contact piece arranged in the housing. The first end of the bimetal sheet is fixed in the housing, the second end of the bimetal sheet is provided with a static contact point, the free end of the elastic contact piece is provided with a contact part that can be detachably connected to the static contact point, and the ratchet button assembly abuts against the contact part. Under the action of an external force, the ratchet button assembly pushes the contact part to move to connect or separate the contact part from the static contact point; the push-button switch of terminal type further includes:

[0006] a reset linkage member rotatably disposed on the housing, the reset linkage member comprising a connecting arm and a reset arm, the connecting arm being used to connect to the contact portion, the reset arm being used to connect to the second end of the bimetallic strip, and when the second end of the bimetallic strip is deformed and displaced, and the contact portion moves under the action of an external force, the reset linkage member is driven to rotate by the connecting arm, thereby driving the reset arm to move the second end of the bimetallic strip in a direction opposite to the deformation and displacement of the second end of the bimetallic strip, so that the static contact moves in a direction close to the contact portion;

[0007] a first terminal, disposed on the housing and connected to the bimetallic strip;

[0008] A second terminal is provided on the housing;

[0009] The indicator light assembly comprises a first power connector and a second power connector, wherein the first power connector is electrically connected to the elastic contact piece, and the second power connector is electrically connected to the second wiring terminal.

[0010] In some embodiments, the first terminal comprises:

[0011] A first terminal frame is provided with a first wire insertion cavity, and the first terminal frame is movably embedded in the housing;

[0012] The first wire-pressing stud is rotatably embedded in a limiting hole provided on the shell, the first wire-pressing stud is threadedly connected to the first terminal frame, the first end of the first wire-pressing stud extends into the first wire insertion cavity, and the axial direction of the first wire-pressing stud is arranged along the moving direction of the first terminal frame.

[0013] In some embodiments, a first bolt head is provided at the second end of the first wire-pressing stud, the first bolt head and the first terminal frame are located on both sides of the limiting hole, and a diameter of the first bolt head is larger than a diameter of the limiting hole.

[0014] In some embodiments, a limiting groove is provided on the shell, the limiting groove is connected to the limiting hole, the first bolt head is rotatably arranged in the limiting groove, and a stop spring extending into the groove cavity is provided on the side wall of the limiting groove, and the stop spring is provided on the side of the first bolt head away from the first wire-pressing stud to prevent the bolt head from leaving the limiting groove.

[0015] In some embodiments, a wire passing window is formed in the housing and is adapted to cooperate with the first wire insertion cavity. A shielding member is provided on the first terminal holder, and the shielding member is disposed on one side of the first terminal holder along the moving direction of the first terminal holder. When the first wire insertion cavity is misaligned with the wire passing window, the shielding member at least partially shields the wire passing window.

[0016] In some embodiments, a first conductive member is connected to the first end of the bimetallic strip. The first conductive member is electrically connected to the first wiring terminal, and the first end of the first pressure screw abuts against the first conductive member.

[0017] In some embodiments, a hook portion is provided on the connecting arm, and a hanging arm is provided on the contact portion. The hanging arm is cooperatively overlapped with the hook portion;

[0018] The reset linkage member further includes a rotating shaft. The connecting arm and the reset arm are disposed on the circumferential side surface of the rotating shaft, and both ends of the rotating shaft are rotatably connected to the housing.

[0019] In some embodiments, the terminal type push-button switch further includes a pressing seat. The housing is connected to the pressing end of the ratchet button assembly. The indicator light assembly includes an indicator light circuit. The indicator light circuit is disposed in the pressing seat. One power supply terminal of the indicator light circuit is electrically connected to the first power supply connector, and the other power supply terminal of the indicator light circuit is electrically connected to the second wiring terminal.

[0020] In some embodiments, the first power supply connector includes a first conductive spring, and the second power supply connector includes a second conductive spring. Both ends of the first conductive spring respectively abut against the elastic contact piece and one power supply terminal of the indicator light circuit, and both ends of the second conductive spring respectively abut against the other power supply terminal of the indicator light circuit and the second wiring terminal.

[0021] In some embodiments, the second wiring terminal includes:

[0022] A second terminal holder movably disposed on the housing;

[0023] A second conductive member disposed in the housing, and the second conductive member is in sliding abutment with the second terminal holder.

[0024] The embodiments of the present application have at least the following beneficial effects:

[0025] The terminal type 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, a first terminal, a second terminal, and an indicator light assembly arranged 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 deform and move 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 arranged at the second end of the bimetal piece to cooperate to connect or disconnect the contact portion of the second end of the elastic contact piece to realize the function of the push-button switch; the first terminal is electrically connected to the bimetal piece, and two power supply ends of the indicator light assembly are respectively connected to the elastic contact piece and the second terminal to realize power supply; the first terminal and the second terminal are respectively used for stably and quickly connecting wires externally.

[0026] On the other hand, by utilizing the characteristic of the bimetal piece deforming under overload, the static contact located at the second end of the bimetal piece can deform and move following the second end of the bimetal piece to disconnect the electrical connection with the elastic contact piece, thereby realizing overload power-off protection; meanwhile, the reset linkage is rotatably arranged on the housing, a connecting arm and a reset arm are arranged on the reset linkage, so that 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 second end of the bimetal piece shifting due to overload deformation, that is, the reset arm is arranged on the overload deformation shifting track of the bimetal piece, so that when the bimetal piece is overloaded and deformed, its second end deforms and shifts and approaches and even abuts against the reset arm; at this time, the contact portion can be shifted by pressing the ratchet button assembly, thereby driving the reset linkage to rotate through the connecting arm, so that the reset arm deflects, and then pushes against the second end of the bimetal piece along the direction opposite to the overload deformation shifting direction of the second end of the bimetal piece, forcing it to move back to its original position, thereby realizing the reset of the shape and position of the bimetal piece after overload to ensure the functional reliability of the switch structure. Description of the Drawings

[0027] 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 following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0028] Figure 1 Shows an exploded view of the structure of the terminal type push-button switch in the embodiment of the present application;

[0029] Figure 2Shows Figure 1 a schematic diagram of the assembled state of the terminal type push-button switch in

[0030] Figure 3 Shows Figure 1 a schematic exploded view of the partial structure in the terminal type push-button switch in

[0031] Figure 4 Shows Figure 2 a schematic diagram of the structure of another angle of the terminal type push-button switch in

[0032] Figure 5 Shows Figure 2 a schematic diagram of the relaxed state structure of the first terminal and the second terminal in the terminal type push-button switch in

[0033] Figure 6 Shows Figure 5 the front view of the wire insertion side of the terminal type push-button switch in

[0034] Figure 7 Shows Figure 6 the rear view of the terminal type push-button switch in

[0035] Figure 8 Shows Figure 2 a schematic diagram of the locked state structure of the first terminal and the second terminal in the terminal type push-button switch in

[0036] Figure 9 Shows Figure 8 the front view of the wire insertion side of the terminal type push-button switch in

[0037] Figure 10 Shows Figure 9 the rear view of the terminal type push-button switch in

[0038] Figure 11 Shows the schematic diagram of the electrical connection structure of the indicator component of the terminal type push-button switch in 1;

[0039] Figure 12 Shows Figure 1 a schematic diagram of the off state structure of the terminal type push-button switch in

[0040] Figure 13 Shows Figure 1 a schematic diagram of the on state structure of the terminal type push-button switch in

[0041] Figure 14 Shows Figure 1 a schematic diagram of the overload state structure of the terminal type push-button switch in Detailed implementation manners

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0043] 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.

[0044] The present application will be described below with reference to the accompanying drawings and specific embodiments:

[0045] When a push-button switch is installed on a device such as a power strip, it is necessary to connect external wires, conductive copper sheets and other conductive parts in various forms and hardness, which is inconvenient to operate; especially for a push-button switch configured with an indicator light assembly and other electrical components, it is also necessary to additionally connect the power supply terminals of the electrical components, which further increases the complexity of the installation operation and limits the application range of the push-button switch. Moreover, due to the diverse usage scenarios of the push-button switch, the situation of electrical overload is likely to occur, resulting in unsatisfactory electrical safety and the reliability of the switch function.

[0046] Therefore, the embodiments of the present application provide a terminal-type push-button switch, aiming to improve the assembly efficiency, usage convenience, safety and functional reliability of the push-button switch to a certain extent.

[0047] Figure 1 Fig. shows an exploded structural view of the terminal-type push-button switch in the embodiments of the present application; Figure 2 Fig. shows Figure 1 the assembled state diagram of the terminal-type push-button switch in Figure 3 Fig. shows Figure 1 the exploded partial structural view of the terminal-type push-button switch in Figure 4 Fig. shows Figure 2 the structural view of another angle of the terminal-type push-button switch in Figure 5 Fig. shows Figure 2 the relaxed state structural view of the first terminal and the second terminal of the terminal-type push-button switch in Figure 6 Fig. shows Figure 5 the front view of the plug-in side of the terminal-type push-button switch in Figure 7 Fig. shows Figure 6 the rear view of the terminal-type push-button switch inFigure 8 shows Figure 2 a schematic structural diagram of the locking state of the first terminal and the second terminal of the terminal type push-button switch in Figure 9 shows Figure 8 the front view of the wire insertion side of the terminal type push-button switch in Figure 10 shows Figure 9 the rear view of the terminal type push-button switch in

[0048] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , in some embodiments, the terminal type push-button switch can be configured as an integrated structure of a push-button switch with overload protection ability and terminals, so as to utilize the terminals to meet the external convenient connection requirements of the push-button switch, and can also meet the electrical connection requirements of the electrical components on the push-button switch, and can also achieve overload protection.

[0049] Specifically, the terminal type push-button switch may include a housing and a ratchet button assembly 2, an elastic contact piece 3, a bimetallic strip 4, a reset linkage 5, an indicator light assembly 7, a first terminal 91 and a second terminal 92 provided on the housing.

[0050] The elastic contact piece 3 is detachably connected to 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 and connect to the bimetallic strip 4 or move away from and disconnect from the bimetallic strip 4, so as to realize the on-off function of the switch. During overload, the deformation and displacement of the bimetallic strip 4 are utilized to disconnect the connection between the bimetallic strip 4 and the elastic contact piece 3, so as to realize overload open-circuit protection.

[0051] The reset linkage 5 is connected to the free end of the elastic contact piece 3 and is arranged to match 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 reset linkage 5 can be driven to act, forcing the bimetallic strip 4 to reset to the position and posture before overload, so as to ensure the reliability of the switch function.

[0052] The first terminal 91 and the second terminal 92 are respectively arranged on the housing 1, and the first terminal 91 is connected to the bimetal 4 for connecting an external power supply terminal of one path; the second terminal 92 is used for connecting an external power supply terminal of another path, so that various forms and hardness of wires, copper sheets and other conductive parts can be adapted through the terminals.

[0053] Electric components such as the indicator lamp assembly 7 are provided with a first power supply connector 72 and a second power supply connector 73. The first power supply connector 72 can be electrically connected to the elastic contact 3, and the second power supply connector 73 is electrically connected to the second terminal 92, so that the electrical connection of the electric components can be realized on the push button switch without an external power supply, which simplifies the installation operation, reduces the installation requirements for devices such as plug boards, and improves the situation of limited application scope.

[0054] Among them, the housing 1 is the bearing basis of the whole push button switch, used for accommodating or installing other functional components such as the ratchet button assembly 2, the elastic contact 3, the bimetal 4, the reset linkage 5, the indicator lamp assembly 7, the first terminal 91 and the second terminal 92. The housing 1 can also be used as the installation basis of the push button switch and configured to be installed on other product structures. For example, the housing 1 can be installed on various electrical devices such as plug boards.

[0055] 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 3 to switch it between two positions and maintain the switched position, so as to realize the switching of the connection and separation states of the elastic contact 3 and the bimetal 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, and the ratchet spring 23 elastically abuts against the lower ratchet 22. The lower ratchet 22 can be pressed down and maintained at the current position by pressing the upper ratchet 21, or the lower ratchet 22 can be lifted and reset and maintained at the current position by pressing the upper ratchet 21, so as to realize the switching between the upper and lower two positions and realize the function of the switch button.

[0056] The elastic contact piece 3 is a conductive contact piece and can undergo a certain degree of deformation and displacement; the first end of the elastic contact piece 3 is a fixed end 31, which can be installed and fixed in the housing 1, and 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 piece 4 to achieve electrical connection. The contact portion 32a can also abut 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.

[0057] The bimetallic piece 4 is an electrical connection component. The first end 41 of the bimetallic piece 4 is installed in the housing 1, and a static contact 42a is provided at the second end 42 of the bimetallic piece 4, and the static contact 42a can be electrically connected or disconnected in cooperation with the elastic contact piece 3. Among them, the bimetallic piece 4 has an overload deformation function and, as an overload-sensitive component, can track the power consumption situation; when the bimetallic piece 4 is overloaded, a large amount of heat will be generated, causing the bimetallic piece 4 to deform in a set direction, and the deformation will accumulate at the second end 42 of the bimetallic piece 4, causing a large-scale deformation and displacement of the second end 42 of the bimetallic piece 4, and the static contact 42a will also be displaced significantly, so as to disconnect the connection with the contact portion 32a, thereby realizing the overload protection open-circuit function.

[0058] The reset linkage 5 is an element for driving the bimetallic piece 4 after overload deformation to reset. It is rotatably provided on the housing 1, and the reset linkage 5 has a connecting arm 51 and a reset arm 52; the connecting arm 51 is connected to the connecting portion 32a, and the reset arm 52 is arranged on the overload deformation bending side of the second end 42 of the bimetallic piece 4. Thus, when the bimetallic piece 4 is overloaded and deformed, the second end 42 of the bimetallic piece 42 will move towards the reset arm 52 or move together with the reset arm 52. When reset is required, the free end 32 of the elastic contact piece 3 can be driven to move by pressing the ratchet button assembly 2, thereby driving the connecting arm 51 to move and driving the reset linkage 5 to rotate, so as to urge the reset arm 52 to push the second end 42 of the bimetallic piece 42 to move in the direction opposite to the deformation direction of the second end 42 of the bimetallic piece 42, and finally reset to the position and posture before overload deformation, so as to restore the cooperation switch function between the bimetallic piece 4 and the elastic contact piece 3 and improve the reliability of the switch function.

[0059] The first terminal 91 is arranged on the housing 1 and is used to accommodate various forms of conductive components such as external wires and copper sheets, and connect to an external power supply terminal; and the first terminal 91 is also connected to the bimetallic strip 4, so as to realize the installation of the conductive structure of the push-button switch. Generally speaking, the first terminal 91 can be externally connected to the live wire. The second terminal 92 is arranged on the housing 1 and is used to connect to another external power supply terminal, usually externally connected to the neutral wire. The second terminal 92 and the first terminal 91 can be respectively connected to the electrical components on the push-button switch to supply power to the electrical components.

[0060] That is to say, by utilizing the characteristics of the convenient assembly and good adaptability of the two terminals, the installation operation can be simplified, the assembly efficiency can be improved, and the requirements for the external conductive structure can be reduced to a certain extent, thereby expanding the scope of application.

[0061] The indicated indicator component 7 is a typical electrical component, which is used to track the conduction condition of the push-button switch and indicate the current conduction state of the push-button switch. The indicator component 7 is configured with a first connection head 72 and a second connection head 73, which are respectively connected to the bimetallic strip 4 and the second terminal 92.

[0062] The overload protection 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, a first terminal, a second terminal and an indicator component arranged in the housing; the first end of the elastic contact piece is installed in 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 in the housing, and the second end of the bimetallic strip is provided with a static contact, which cooperates to connect or disconnect the contact part of the second end of the elastic contact piece to realize the function of the push-button switch; the first terminal is electrically connected to the bimetallic strip, and the two power supply terminals of the indicator component are respectively connected to the elastic contact piece and the second terminal to realize power supply; the first terminal and the second terminal are respectively used to stably and quickly connect wires externally.

[0063] On the other hand, by utilizing the characteristic of the bimetal sheet to deform under overload, the static contact located at the second end of the bimetal sheet can move following the deformation of the second end of the bimetal sheet to disconnect the electrical connection with the elastic contact piece, thereby achieving 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 trajectory of the reset arm intersects with the trajectory of the second end of the bimetal sheet shifting due to overload deformation, that is, the reset arm is arranged on the overload deformation shifting trajectory of the bimetal sheet. Thus, when the bimetal sheet is deformed due to overload, its second end deforms and shifts, approaching and even abutting against the reset arm. At this time, the contact part can be displaced by pressing the ratchet key assembly, thereby driving the reset linkage to rotate through the connecting arm, so that the reset arm deflects, and then pushing the second end of the bimetal sheet along the direction opposite to the overload deformation shifting direction of the second end of the bimetal sheet, forcing it to move back to its original position, thereby realizing the reset of the shape and position of the bimetal sheet after overload to ensure the functional reliability of the switch structure.

[0064] See Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , in some embodiments, the first wiring terminal 91 may include a first terminal holder 911 and a matching first pressure screw 912. The first terminal holder 911 is arranged on the housing 1, and the first terminal holder 911 is provided with a first wire insertion cavity 911a for accommodating conductive parts such as wires and copper sheets. The first pressure screw 912 is screwed on the first terminal holder 911, and one end of the first pressure screw 912 extends into the first wire insertion cavity 911a. Thus, the conductive part can be pressed tightly between the first terminal holder 911 and the first pressure screw 912 by rotating the first pressure screw 912.

[0065] In some embodiments, a sliding groove 15 may be arranged on the housing 1, and the first terminal holder 911 is movably embedded in the sliding groove 15. A limiting hole 16 may be arranged on the housing 1, and the first pressure screw 912 passes through the limiting hole 16 and can only rotate in place. Thus, when the first pressure screw 912 rotates, the first terminal holder 911 can be pulled to move, so that most of the main body of the first terminal holder 911 can be blocked by the housing 1 to avoid interfering with other structures or debris entering the first wire insertion cavity 911a.

[0066] In some embodiments, in order to realize the in-situ rotation of the first wire-pressing stud 912, a first bolt head 912a may be provided at the second end of the first wire-pressing stud 912. The diameter of the first bolt head 912a is larger than the diameter of the limiting hole 16, and the first bolt head 912a and the first terminal holder 911 are located on both sides of the limiting hole 16.

[0067] In some embodiments, in order to limit the axial movement of the first wire-pressing stud 912, a limiting groove 17 may be provided on the housing 1. The limiting groove 17 is communicated with the limiting hole 16, and the first bolt head 912a is located in the limiting groove 17; a stop spring piece 18 extending into the groove is provided on the side wall of the limiting groove 17. The stop spring piece 18 blocks the side of the first bolt head 912a away from the first wire-pressing stud 912, thereby limiting the axial separation of the first bolt head 912a from the limiting groove 17.

[0068] During installation, the stop spring piece 18 can be lifted, the first wire-pressing stud 912 can be inserted, and then the stop spring piece 18 can be released. The stop spring piece 18 can be reset naturally.

[0069] Generally, the number of the stop spring pieces 18 can be set to be multiple, such as four, and they can be arranged at equal intervals in the circumferential direction on the inner side wall of the limiting groove 17.

[0070] In some embodiments, considering that the first terminal holder 911 may be hidden in the housing 1, a wire-passing window 19 may be opened on the housing 1. In cooperation with the first wire-inserting cavity 911a, when at least part of them is in alignment and communicated, conductive parts such as wires and copper sheets can be inserted, and then pressed by the first wire-pressing stud 912.

[0071] In some embodiments, since the first terminal holder 911 is a movable part and the position of the wire-passing window 19 is fixed, it is easy to misjudge the position of the first terminal holder 911, that is, the first terminal holder 911 moves along the sliding groove 15 to the side away from the wire-passing window 19. At this time, there is no wiring terminal structure in the wire-passing window 19, but the first wire-pressing stud 912 can also be locked. In fact, conductive parts such as wires or copper sheets are also located in the wire-passing window 19, but are not locked and are only kept in the wire-passing window 19 due to position adaptation, resulting in electrical connection failure.

[0072] To this end, a shielding member 911b may be provided on the first terminal block 911, and the shielding member 911b is arranged on one side of the first terminal block 911 along the moving direction of the first terminal block 911, that is, on the side of the first terminal block 911 close to the wire threading window 19. When the first wire insertion cavity 911a is aligned with the wire threading window 19, wire threading can be achieved; when the first terminal block 911 is away from the wire threading window 19, the shielding member 911b will gradually shield the wire threading window 19, thereby at least partially shielding the wire threading window 19 to prevent mis-wiring.

[0073] In fact, when the wire threading window 19 is partially shielded, it can only prompt the assembler that the first terminal block 911 is in a non-wiring position, and it can also prevent mis-wiring.

[0074] Generally speaking, the shielding member 911b can be directly formed on the first terminal block 911.

[0075] In some embodiments, a first conductive member 46 is connected to the first end 41 of the bimetallic strip 4 for connecting the bimetallic strip 4 to the first wiring terminal 91.

[0076] Generally speaking, the first conductive member 46 can be embedded in the first wire insertion cavity 911a and is pressed by the first wire pressing stud 912 after a conductive member such as an external wire or a copper sheet is inserted into the first wire insertion cavity 911a.

[0077] Figure 11 shows a schematic diagram of the electrical connection structure of the indicator lamp assembly of the terminal type push-button switch in 1; Figure 12 shows Figure 1 the schematic diagram of the off state structure of the terminal type push-button switch in; Figure 13 shows Figure 1 the schematic diagram of the on state structure of the terminal type push-button switch in; Figure 14 shows Figure 1 the schematic diagram of the overload state structure of the terminal type push-button switch in.

[0078] See Figure 1 and Figure 11 In some embodiments, the second wiring terminal 92 can be connected to a power supply terminal of the indicator lamp assembly 7 through a second power supply connector 93.

[0079] See Figure 1 、 Figure 12 、 and Figure 13, in some embodiments, a through hole 43 penetrating the bimetal sheet 4 is formed in the bimetal sheet 4 in the thickness direction, and an extension arm 44 extending into the through hole 43 is provided at the second end 42 of the bimetal sheet 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 bimetal sheet 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 bimetal sheet 4.

[0080] That is to say, when the bimetal sheet 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 bimetal sheet 4 moves closer to the contact portion 32a, thereby realizing the overload power-off function.

[0081] Correspondingly, by pressing the ratchet button assembly 2, the free end 32 of the elastic contact piece 3 can be moved, so that the reset linkage 5 is guided to rotate through the connecting arm 51, and the reset arm 52 is deflected synchronously, so as to drive the second end 42 of the bimetal sheet 4 to move and finally reset, so that the static contact 42a moves closer to the contact portion 32a following the extension arm 44 and finally resets to the preset switch working position.

[0082] It should be noted that the overload condition occurs when the contact portion 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 conducting 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 open working position of the backlit button switch, that is, the position where the free end 32 of the elastic contact piece 3 is away from the static contact 42a of the bimetal sheet 4, that is, the pressing stroke for closing the backlit button switch in the general understanding.

[0083] Through the position coordination of the reset linkage 5 with the elastic moving contact piece 3 and the bimetal sheet 4, integrating the reset operation of the bimetal sheet 4 into the open operation of the ratchet button assembly 2 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 portion 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 sheet into the open operation of the ratchet button assembly 2, the operation can be simplified and the operation convenience can be improved.

[0084] In some embodiments, in order to enable the reset linkage 5 to synchronously deflect and drive the second end 42 of the bimetal 4 to move and reset during the process that the contact portion 32a of the elastic contact piece 3 moves away from the stationary contact point 42a of the bimetal 4, the reset linkage 5 can be configured as a lever principle mechanism. The contact portion 32a moves the connecting arm, thereby driving the reset linkage 5 to deflect, so that the reset arm 52 moves the second end 42 of the bimetal 4.

[0085] 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, thereby forming a reset linkage mechanism similar to a lever.

[0086] That is, when the connecting arm 51 is driven by the contact portion 32a, it will rotate around the rotating shaft 53 and drive the rotating shaft 5 to rotate. Correspondingly, the reset arm 52 will also rotate around the rotating shaft 53 under the drive of the rotating shaft 53, so as to be able to move the second end 42 of the bimetal 4 and make the stationary contact point 42a move and reset.

[0087] 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 approximately equivalent to the moving stroke of the free end 32 of the elastic contact piece 3, thereby simplifying the specification grading design of the connecting arm 51 and the reset arm 52.

[0088] 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.

[0089] Generally, 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 the first end 41 and the second end 42 of the bimetal 4.

[0090] 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, thereby being able to limit the overall length of the backlit push-button switch to a certain extent.

[0091] In some embodiments, both ends of the rotating shaft 53 are rotatably connected within the housing 1. Correspondingly, the connecting arm 51 and the reset arm 52 can be arranged in the middle region of the rotating shaft 53.

[0092] 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 in a cylindrical shape to achieve smooth rotation.

[0093] In some embodiments, in order to reduce the interference risk between the reset linkage 5 and the contact portion 32a and take into account the reliability between the reset linkage 5 and the contact portion 32a, the connecting arm 51 can be lapped on the contact portion 32a. During the process that the contact portion 32a moves 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.

[0094] On the other hand, during the process that the contact portion 32a approaches 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.

[0095] 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. Therefore, 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 to achieve efficient and stable reset.

[0096] 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.

[0097] Generally speaking, the hook portion 51a can be lapped on the side of the contact portion 32a away from the bimetal 4. Thus, during the process that the contact portion 32a moves away from the bimetal 4, that is, during the stroke of turning off the backlit pushbutton 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.

[0098] In other embodiments, the connecting arm 51 can also be directly connected to the contact portion 32a, and various connection methods such as snap-fitting and bonding can be adopted.

[0099] In some embodiments, in order to facilitate the connection of the hooking portion 51a, a hanging arm 32b may be provided on one side of the contact portion 32a, so as to be adapted to hook the hooking portion 51a.

[0100] In some embodiments, the reset arm 52 and the second end 42 of the bimetallic sheet 4 may be connected in a non-fixed manner, such as in a relatively open form such as lapping or abutting, or a certain gap may be maintained.

[0101] That is, the reset arm 52 is located on the side of the deformation and bending of the second end 42 of the bimetallic sheet 4. When the reset linkage 5 moves following the free end 32, the reset arm 52 pushes the second end 42 of the bimetallic sheet 4 to move back to its original position.

[0102] In some embodiments, the reset arm 52 may be provided as a block-shaped member, having a contact surface adapted to the second end 42 of the bimetallic sheet 4 for contacting and pushing the bimetallic sheet 4.

[0103] See Figure 14 、 Figure 1 、 Figure 12 and Figure 13 Figure 14 , in some embodiments, a manual pressing member 6 may be provided on the housing 1. The manual pressing member 6 is movably provided on the housing 1, and the manual pressing member 6 lapps on the second end 42 of the bimetallic sheet 4, so as to be able to push the second end 42 of the bimetallic sheet 4 to move, thereby realizing a reset function. It constitutes a backup reset function structure of the reset linkage 5.

[0104] Generally, on the manual pressing member 6, a radial flange 63 is provided for lapping on the second end of the bimetallic sheet 4, so as to facilitate the manual pressing member 6 to drive the second end of the bimetallic sheet 4 to move.

[0105] In some embodiments, the bimetallic sheet 4 may also adopt other forms of bimetallic sheets, but their basic principles are the same. In an overload state, the bimetallic sheet 4 will all show a situation of deforming and shifting in a set direction. The reset linkage 5 may be arranged in cooperation according to the direction of deformation and shift of the second end of the bimetallic sheet 4, so as to synchronously drive the reset linkage 5 to rotate during the process of driving the contact portion 32a to shift by pressing the ratchet key assembly 2, so as to push and reset the second end 42 of the bimetallic sheet 4.

[0106] As described, the bimetal 4 can be set as an integral sheet-like member, with one end fixed inside the housing 1 and the other end being a free end. The stationary contact 42a is fixed on the free end of the bimetal 4 and can move along with the free end of the bimetal 4, approaching or moving away from the contact portion 32a. At this time, the moving direction of the stationary contact 42a is the same as that of the free end of the bimetal 4.

[0107] When the bimetal 4 is overloaded, the second end of the bimetal 4 and the stationary 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 4 closer to the contact portion 32a.

[0108] Generally, the reset arm 52 can be arranged on the side of the bimetal 4 away from the contact portion 32a, and in the length direction of the bimetal 4, the reset arm 52 and the connecting arm 51 are located 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 4, the reset arm 52 pushes the second end 42 of the bimetal 4 to move and reset in the direction of the contact portion 32a, ultimately driving the stationary contact 42a to reset.

[0109] 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 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 4, the free end 32 of the elastic contact piece 3 is suspended in the middle of the bimetal 4, and the reset linkage 5 is located on one side of the second end 42 of the bimetal 4.

[0110] In some embodiments, in order to reduce the length of the backlit push-button switch, the elastic contact piece 3 can be arranged on one side in the width direction of the bimetal 4, that is, the fixed end 31 of the elastic contact piece 3 is arranged on the side beside the orthogonal direction of the connection line between the first end 41 and the second end 42 of the bimetal 4, and the free end 32 can extend to the middle of the bimetal 4 and be arranged opposite to the stationary contact 42a in a matching manner.

[0111] In some embodiments, the housing 1 can be set as a snap-together base 11 and an upper cover 12 for easy installation.

[0112] 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.

[0113] 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.

[0114] In some embodiments, in order to improve the installation stability of the indicator light circuit 71a, a movable pressing seat 74 may 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 may be disposed within the pressing seat 74.

[0115] In some embodiments, in order to improve the stability of the movement 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.

[0116] Generally, the axial direction of the guiding post 14 is set as the pressing direction of the ratchet button assembly 2.

[0117] In some embodiments, the first power connector 72 may be set as a first conductive spring 72a. 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.

[0118] 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 limitation.

[0119] In some embodiments, the indicator light circuit 71a is set as a solid-state circuit in the form of an integrated circuit board.

[0120] In some embodiments, the second power connector 73 may also be set as a second conductive spring 73a. Two ends of the second conductive spring 73a respectively abut against the second wiring terminal 93 and the power supply end of the indicator light circuit 71a.

[0121] 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.

[0122] In some embodiments, in order to facilitate the planning of the installation position, a second conductive member 923 may be fixed within the housing 1. The second conductive member 923 is connected to the second wiring terminal 92, and the second conductive spring 73a abuts against the second conductive member 923.

[0123] Generally speaking, the second terminal 92 may have the same structure and installation method as the first terminal 91, that is, the second terminal 92 also includes a second terminal holder and a second pressure screw. The second terminal holder is also movably arranged on the housing, and the second pressure screw is screwed on the second terminal holder. Therefore, the second conductive member 923 can be fixed in the housing 1, and the second terminal holder is slidably connected to the second conductive member 923.

[0124] In this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact 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 merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0125] 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 therefore should not be construed as a limitation to this application.

[0126] 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 this specific posture changes, the directional indications will also change accordingly . In the present application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. 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 can be the communication inside two elements or the interaction relationship between two elements, 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, the descriptions such as "first", "second", etc. 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, the 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.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means 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.

[0128] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0129] 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 principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A terminal type push-button switch, comprising a housing, a ratchet button assembly, a bimetal sheet and an elastic contact piece arranged in the housing. The first end of the bimetal sheet is fixed in the housing, a static contact is arranged at the second end of the bimetal sheet, a contact part detachably connected to the static contact is arranged at the free end of the elastic contact piece, the ratchet button assembly abuts against the contact part, and under the action of an external force, the ratchet button assembly pushes the contact part to move so as to connect or disconnect the contact part from the static contact; characterized in that, The terminal type push button switch further includes: a reset linkage member rotatably disposed on the housing, the reset linkage member comprising a connecting arm and a reset arm, the connecting arm being used to connect to the contact portion, the reset arm being used to connect to the second end of the bimetallic strip, and when the second end of the bimetallic strip is deformed and displaced, and the contact portion moves under the action of an external force, the reset linkage member is driven to rotate by the connecting arm, thereby driving the reset arm to move the second end of the bimetallic strip in a direction opposite to the deformation and displacement of the second end of the bimetallic strip, so that the static contact moves in a direction close to the contact portion; a first terminal, disposed on the housing and connected to the bimetallic strip; A second terminal is provided on the housing; The indicator light assembly includes a first power connector and a second power connector, wherein the first power connector is electrically connected to the elastic contact piece, and the second power connector is electrically connected to the second wiring terminal.

2. The terminal type push-button switch according to claim 1, wherein, The first terminal comprises: A first terminal frame is provided with a first wire insertion cavity, and the first terminal frame is movably embedded in the housing; The first wire-pressing stud is rotatably embedded in a limiting hole provided on the shell, the first wire-pressing stud is threadedly connected to the first terminal frame, the first end of the first wire-pressing stud extends into the first wire insertion cavity, and the axial direction of the first wire-pressing stud is arranged along the moving direction of the first terminal frame.

3. The terminal type push-button switch according to claim 2, wherein A first bolt head is provided at the second end of the first pressing stud. The first bolt head and the first terminal frame are located on both sides of the limiting hole, and the diameter of the first bolt head is larger than the diameter of the limiting hole.

4. The terminal type push-button switch according to claim 3, characterized in that A limiting groove is provided on the shell, and the limiting groove is connected to the limiting hole. The first bolt head is rotatably arranged in the limiting groove. A stop spring extending into the groove cavity is provided on the side wall of the limiting groove, and the stop spring is provided on the side of the first bolt head away from the first wire-pressing stud to prevent the bolt head from leaving the limiting groove.

5. The terminal type push-button switch according to claim 2, characterized in that, The shell is provided with a wire threading window that cooperates with the first wire insertion cavity, and the first terminal frame is provided with a shielding member, and the shielding member is arranged on one side of the first terminal frame along the moving direction of the first terminal frame. When the first wire insertion cavity and the wire threading window are misaligned, the shielding member at least partially blocks the wire threading window.

6. The terminal type push-button switch according to claim 2, wherein, The first end of the bimetallic strip is connected to a first conductive member, the first conductive member is electrically connected to the first terminal, and the first end of the first crimping stud abuts against the first conductive member.

7. The terminal type push-button switch according to claim 1, wherein The connecting arm is provided with a hook portion, the contact portion is provided with a hanging arm, and the hanging arm is overlapped with the hook portion; The reset linkage member further includes a rotating shaft, the connecting arm and the reset arm are arranged on the circumferential side surface of the rotating shaft, and both ends of the rotating shaft are rotatably connected to the housing.

8. The terminal type push-button switch according to any one of claims 1 to 7, characterized in that The terminal-type push-button switch further includes a pressing seat, the housing is connected to the pressing end of the ratchet push-button assembly, the indicator light assembly includes an indicator light circuit, the indicator light circuit is arranged in the pressing seat, one power supply end of the indicator light circuit is electrically connected to the first power supply connector, and the other power supply end of the indicator light circuit is electrically connected to the second terminal.

9. The terminal type push-button switch according to claim 8, characterized in that The first power supply connector includes a first conductive spring, the second power supply connector includes a second conductive spring, two ends of the first conductive spring respectively abut against the elastic contact piece and one power supply end of the indicator light circuit, and two ends of the second conductive spring respectively abut against the other power supply end of the indicator light circuit and the second terminal.

10. The terminal type push-button switch according to claim 9, characterized in that, The second terminal includes: a second terminal holder movably arranged on the housing; a second conductive member arranged in the housing, and the second conductive member is in sliding abutment with the second terminal holder.

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