Combination switch and its self-locking mechanism

Abstract

The present application belongs to the technical field of control switches, and discloses a combination switch and a self-locking mechanism thereof, wherein the self-locking mechanism comprises a mounting unit, a first contact sub-unit, a control shaft and a transmission member, wherein the first contact sub-unit comprises two symmetrically distributed static contacts, a moving contact with two contact points, and a driving member, wherein the two sides of the driving member are respectively abutted against the two ends of the moving contact by two compression springs; the combination switch comprises the self-locking mechanism as well as a mounting base, a control button and a housing, wherein the control button is connected to the control shaft and controls its movement or rotation, and the present application can realize a combination of a push-type control switch and a push-type self-locking control switch.

Description

Technical Field

[0001] The present application belongs to the technical field of control switches, and in particular relates to a combination switch and a self-locking mechanism thereof. Background Art

[0002] In the prior art, the self-locking mechanism used in a control switch generally includes a first control unit, a second control unit, and a control button. The first control unit and the second control unit are respectively connected to different external circuits, and are used to control the on and off of the corresponding circuits. By pressing the control button, the first control unit can be closed and connected. After releasing the button, the first control unit always remains in the closed and connected state, achieving the so-called "self-locking". In addition, by pressing the control button, the first control unit and the second control unit can be switched between open and closed alternately, that is, when the first control unit is closed and connected, the second control unit is normally open. When the second control unit is closed and connected, the first control unit is normally open. The self-locking mechanism can realize the alternating conduction control of different circuits.

[0003] However, each control unit in existing self-locking mechanisms typically includes multiple control subunits for controlling multiple external circuits. These multiple control subunits are directly integrated together. Furthermore, these self-locking mechanisms are often integrated with other mechanisms, such as indicator lights or universal switches, to function as combination switches. Repairing or replacing a control subunit within a combination switch requires disassembling the entire switch, making it impossible to disassemble individual control subunits. Summary of the Invention

[0004] The purpose of the present application is to overcome the defects of the prior art, thereby providing a combined switch and a self-locking mechanism thereof, which realizes the combination of a push-type control switch and a push-self-locking control switch.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a self-locking mechanism, comprising:

[0007] A mounting unit, mounted on a bolt;

[0008] a first contact subunit, provided on the mounting unit, comprising two symmetrically distributed static contacts, a dynamic contact having two contact points, and a driving member, wherein the static contact is electrically connected to an external circuit via an electrical connection sheet, and two sides of the driving member are respectively abutted against two ends of the dynamic contact via two compression springs;

[0009] A control shaft is provided through the mounting unit;

[0010] The transmission member is provided on the mounting unit and is used for moving under the push of the control shaft and thereby driving the corresponding driving member to move.

[0011] In some embodiments, the self-locking mechanism includes a second contact subunit provided on the mounting unit. The structure of the second contact subunit is the same as that of the first contact subunit, and the mounting position of the second contact subunit is opposite to that of the first contact subunit.

[0012] In some embodiments, the first contact sub-unit has a side mounting substrate and two limiting members, the side mounting substrate is provided on the mounting unit, and the limiting members are used to limit the moving stroke of the moving contact.

[0013] In some embodiments, the side mounting substrate has two lateral protrusions located on both sides thereof and a bottom groove located at the bottom thereof, and two side holes matching the lateral protrusions are provided on the side of the mounting body of the mounting unit corresponding to the side mounting substrate, and a positioning protrusion matching the bottom groove is provided on the mounting body, and the lateral protrusion is used to be inserted into the side hole, and the bottom groove is used to be inserted into the positioning protrusion.

[0014] In some embodiments, the driving member has a protrusion, a first plate, a second plate, a third plate and a fourth plate, the first plate and the second plate are vertically arranged on one side of the third plate, the fourth plate is arranged between the first plate and the second plate, and the protrusion of the fourth plate is against the two ends of the moving contact through the compression spring.

[0015] In some embodiments, the moving contact has a connecting plate and two contacts arranged at both ends of the connecting plate, and a first avoidance hole is further provided in the middle of the connecting plate.

[0016] In some embodiments, the control shaft includes a square shaft section and a circular shaft mounting section, the circular shaft mounting section is sleeved with a control push block, the control push block is provided with fastening plates on the front and rear sides, and the fastening plates have side openings for clamping on the circular shaft mounting section.

[0017] In some embodiments, the self-locking mechanism also includes a linkage part, a return spring and a linkage housing, the linkage part is rotatably provided on the linkage housing, the linkage housing is fixed to the self-locking mounting seat and the mounting seat by the bolts, and the return spring is provided on the control shaft and is against the linkage housing.

[0018] In some embodiments, the transmission member has a mating opening and a mating block, the mating block is clamped on the mating opening, the linkage member is spaced apart from the mating block, and a second avoidance hole is provided in the middle of the linkage member.

[0019] In the second aspect, the present application provides a combination switch, including the self-locking mechanism, a mounting seat, a control button and a shell, the control button is connected to the control shaft to control the movement or rotation of the control shaft, and the shell is mounted on the outside of the self-locking mechanism and is engaged with the mounting seat.

[0020] Compared with the prior art, the combination switch and its self-locking mechanism provided by this application have the following beneficial effects:

[0021] This application implements a combination of a push-type control switch and a push-to-lock control switch. One option is a pure push-to-lock control switch, which can be pressed at any position. Another option is a push-to-lock control switch with a push-to-lock control switch. Pressing one switch in a certain position locks the switch, while the other automatically returns to its original position. Pressing the other switch in a different position unlocks the switch. Another option is a switch in a previous position locks the switch, while the other remains in its original position. Pressing the other switch unlocks the locked switch, while the remaining locked switch remains locked.

[0022] Furthermore, the self-locking mechanism of the present application comprises a self-locking mounting portion, a first contact subunit, a second contact subunit, a control shaft, and a linkage member. The control shaft can be moved or rotated under the control of a control button. When it moves, it can push a portion of the structure of the first contact subunit or the second contact subunit to move, thereby converting the corresponding first contact subunit or the second contact subunit from a normally open state (not connected) to a normally closed state (connected). When it rotates, it is used to switch the object being pushed between the first contact subunit and the second contact subunit. The linkage member can enable the first contact subunit and the second contact subunit to be linked when pushed by the control shaft. Therefore, the first contact subunit and the second contact subunit can be alternately switched on and off by the control button of the combination switch.

[0023] Furthermore, in the present application, both the first contact sub-unit and the second contact sub-unit are detachably arranged on the self-locking mounting part. When a certain contact sub-unit needs to be repaired or replaced, it is only necessary to remove the contact sub-unit separately, and there is no need to disassemble the entire combination switch as a whole. This only affects the operation of a certain external circuit, thereby ensuring the reliability of the switch control. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings required for the technical description.

[0025] Figure 1 This is a structural diagram of a combination switch provided in an embodiment of the present application;

[0026] Figure 2 This is a schematic structural diagram of the embodiment of the present application after removing the housing of the combination switch;

[0027] Figure 3 This is a partial structural diagram of the self-locking mechanism provided in an embodiment of the present application;

[0028] Figure 4 This is an exploded view of the fixing of the bolt provided in the embodiment of the present application;

[0029] Figure 5 Schematic diagram of the structure of the control shaft and protective shell provided in an embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of the structure of the control shaft and the control push block before assembly provided by an embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of the structure of the control shaft and the control push block after assembly provided by an embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the structure of the control push block provided in an embodiment of the present application;

[0033] Figure 9 This is another structural diagram of the control push block provided in an embodiment of the present application;

[0034] Figure 10 This is a structural diagram of a set of first contact sub-units, second contact sub-units, and mounting units provided in an embodiment of the present application;

[0035] Figure 11 yes Figure 10 A schematic diagram of the structure after the first contact subunit and the second contact subunit are removed from the structure;

[0036] Figure 12 yes Figure 11 Explosion diagram of

[0037] Figure 13 is an exploded view of the contact group provided in the embodiment of the present application;

[0038] Figure 14 This is an exploded view of the contact group provided in an embodiment of the present application from another perspective;

[0039] Figure 15 This is a schematic structural diagram of the matching block provided in an embodiment of the present application;

[0040] Figure 16 Schematic diagram of the three-dimensional structure of the normally open contact subunit provided in an embodiment of the present application;

[0041] Figure 17 This is a front view of the normally open contact subunit provided in an embodiment of the present application;

[0042] Figure 181 is a schematic diagram of a first contact sub-unit in a normally open state provided by an embodiment of the present application;

[0043] Figure 19 is a schematic diagram of the three-dimensional structure of the side mounting substrate provided in an embodiment of the present application;

[0044] Figure 20 1 is a schematic diagram of a second contact sub-unit in a normally closed state provided in an embodiment of the present application;

[0045] Figure 21 is a partial structural diagram of a contact assembly provided in an embodiment of the present application;

[0046] Figure 22 is a schematic diagram of the three-dimensional structure of the driving member provided in an embodiment of the present application;

[0047] Figure 23 Schematic diagram of the structure of the movable contact provided in an embodiment of the present application;

[0048] Figure 24 This is a schematic structural diagram of the self-locking mechanism provided by an embodiment of the present application, with the side mounting substrate, the self-locking mounting portion, and the linkage housing removed;

[0049] Figure 25 It is a structural diagram of the linkage provided in the embodiment of the present application;

[0050] Figure 26 This is a schematic diagram of the linkage member provided in the embodiment of the present application not being installed in the self-locking mechanism;

[0051] Figure 27 This is a schematic diagram of a linkage member provided in an embodiment of the present application installed in a self-locking mechanism;

[0052] Figure 28 is a cross-sectional schematic diagram of the self-locking mechanism provided in an embodiment of the present application;

[0053] Figure 29 This is a structural schematic diagram of the combination switch provided in an embodiment of the present application from another perspective after the shell is removed. DETAILED DESCRIPTION

[0054] The following is further explained in detail through specific implementation methods.

[0055] like Figures 1 to 29 As shown, the present invention provides a combination switch 1000, comprising a self-locking mechanism 70, a contact assembly 100, a mounting base 200, a control button 300, and a housing 400. The control button 300, self-locking mechanism 70, and contact assembly 100 are disposed on the mounting base 200. The control button 300 is used to control the operating state of the self-locking mechanism 70 and contact assembly 100. The housing 400 is disposed externally of the self-locking mechanism 70 and contact assembly 100 and is engaged with the mounting base 200.

[0056] like Figure 2 As shown, the combination switch 1000 has several contact groups 100 arranged and connected in sequence, with a maximum of four contact groups 100 stacked together. Each contact group 100 can include two contact units, and the combination of the two contact units can be divided into one normally open and one normally closed, two normally open, or two normally closed.

[0057] The mounting base 200 consists of three parts. The front part is a metal fixing base with a round through hole in the center. The through hole is provided with an internal thread near the handle to meet the overall installation requirements of the switch. The middle part is the base for installing the indicator light. The rear part is the base for positioning the push switch, which is provided with a bolt positioning hole for fastening the overall combination switch. Figure 4 As shown, the mounting seat 200 further comprises a mounting seat bolt positioning assembly 201 and a mounting seat reinforcement iron plate assembly 202 , and the bolt 80 passes through the mounting seat reinforcement iron plate assembly 202 and is installed on the mounting seat bolt positioning assembly 201 .

[0058] like Figures 3 to 15 As shown, contact assembly 100 includes mounting unit 11, first contact sub-unit 21, second contact sub-unit 31, control shaft 40, transmission member 50, and bolt 80, which is a fastening bolt. Contact assembly 100 is mounted in front of the self-locking mounting portion, that is, the contact assembly is mounted on the self-locking mounting portion, which controls the on / off state of contact assembly 100.

[0059] The two bolts 80 are used to at least mount and fix the contact group 100. The contact group 100 has a plurality of mounting units 11, which are integrally formed or sequentially arranged together. In this embodiment, the plurality of mounting units 11 are sequentially arranged on the two bolts 80.

[0060] The mounting unit 11 includes a mounting body 113 having two through-holes 114 and a through-hole 116. The two through-holes 114 are designed to fit over the bolts 80 and are sized to fit the bolts 80. The through-hole 116 allows the control shaft 40 to pass through. The two through-holes 114 and the through-hole 116 are parallel, with their axes lying in the same plane. The mounting body 113 forms a contact subunit mounting station on either side of this plane, with the two mounting stations symmetrically located relative to this plane.

[0061] The mounting body 113 has a transmission member mounting hole, a travel hole 115 , two side holes 111 and a positioning protrusion 112 .

[0062] The first contact sub-unit 21 is disposed on the mounting unit 11 , and the second contact sub-unit 31 is disposed on the mounting unit 11 .

[0063] In one embodiment, the number of the first contact sub-units 21 , the second contact sub-units 31 and the installation units 11 are equal, and the installation unit 11 is provided corresponding to one first contact sub-unit 21 and one second contact sub-unit 31 .

[0064] The first contact subunit 21 and the second contact subunit 31 are used to connect to different external circuits respectively and control the on and off of the corresponding circuits. The first contact subunit 21 and the second contact subunit 31 are both detachably disposed on the corresponding mounting unit 11 .

[0065] In a general state, the contact sub-units are a set of first contact sub-units 21 and a set of second contact sub-units 31 used in pairs, but they can also be two sets of first contact sub-units 21 or two sets of second contact sub-units 31 used in pairs.

[0066] The control shaft 40 is connected to the control button 300 and is used to move or rotate under the control of the control button 300. When it moves, it is used to push part of the structure to move, so that the corresponding first contact sub-unit 21 or the second contact sub-unit 31 is converted from a normally open state that is not connected to a normally closed state that is connected or from a normally open state that is connected to a normally closed state that is not connected. When it rotates, it is used to switch the pushed object between the first contact sub-unit 21 and the second contact sub-unit 31.

[0067] like Figures 5 to 9 As shown, the control shaft 40 includes a square shaft section 40a and a round shaft mounting section 40b. The cross section of the square shaft section 40a is square, and the cross section of the round shaft mounting section 40b is round.

[0068] The round shaft installation section 40b is arranged corresponding to a predetermined position component in front of the first contact sub-unit 21 and the second contact sub-unit 31. The cross-sectional size of the round shaft installation section 40b is slightly smaller than that of the square shaft section 40a.

[0069] The round shaft mounting section 40b is disposed between the two square shaft sections 40a. The square shaft section 40a and the round shaft mounting section 40b are integrally formed.

[0070] A control push block 41 is sleeved on the circular shaft mounting section 40b. The control push block 41 can be sleeved on the square shaft section 40a first and then moved to the circular shaft mounting section 40b so that the control push block 41 is sleeved on the edge of the circular shaft mounting section 40b.

[0071] The control push block 41 is also provided with fastening tabs 42 on its front and rear sides. These tabs 42 have lateral openings that engage the circular shaft mounting section 40b through these openings, securing the control push block 41 to the square shaft section 40a. This allows the control push block 41 to move synchronously with the movement of the control shaft 40. The outer periphery of the control push block 41 also has two lateral protrusions 411 spaced 90° apart.

[0072] A protective shell 43 is also provided around the outer periphery of the control push block 41. This shell 43 is positioned over the two bolts 80 and in front of the mounting unit 11. A clearance hole is provided within the protective shell 43. This prevents the protective shell 43 from coming into contact with the lateral protrusion 411 and from interfering with its movement. The protective shell 43 provides insulation.

[0073] In one embodiment, the control push block 41 has two lateral protrusions 411, which extend and protrude outward. The two lateral protrusions 411 are adjacent and arranged at 90 degrees. A square hole is opened in the middle of the control push block 41. Figure 8 shown.

[0074] In one embodiment, the control push block 41 is circular in shape with a square hole in the middle. Figure 9 shown.

[0075] like Figure 2 As shown, the tail of the bolt 80 is provided with a fastener 44, and the fastener 44 enables each structure provided on the two bolts 80 to be fastened to the mounting seat 200. The fastener 44 is, for example, a nut.

[0076] like Figures 10 to 20 As shown, the first contact subunit 21 and the second contact subunit 31 have similar structures, but the installation method, operating principle, and applicable components are 90% essentially the same, and the installation positions are relatively opposite. The structure of the contact subunits is described in detail below, using the first contact subunit 21 as an example. The first contact subunit 21 is a normally open contact subunit, while the second contact subunit 31 is a normally closed contact subunit. When the control button 300 is pressed, the normally closed position of the second contact subunit 31 is converted to normally open.

[0077] The first contact sub-unit 21 includes a side mounting substrate 211 , a contact assembly 212 and two stoppers 213 .

[0078] The side mounting base plate 211 is removably mounted on an installation station of the mounting body 113 of the corresponding mounting unit 11. The side mounting base plate 211 has two lateral protrusions 2111 on either side and a bottom groove 2112 at its bottom. The side of the mounting body 113 corresponding to the side mounting base plate 211 is provided with two side holes 111 that mate with the lateral protrusions 2111. The mounting body 113 is also provided with a positioning protrusion 112 that mates with the bottom groove 2112. The lateral protrusions 2111 are designed to snap into the side holes 111, while the bottom groove 2112 is designed to snap into the positioning protrusion 112.

[0079] In one embodiment, the cross section of the lateral protrusion 2111 is triangular, and the positioning protrusion 112 is a rectangular frame.

[0080] like Figures 16 to 20 As shown, the first contact subunit 21 is mounted on the mounting unit 11 and includes two symmetrically distributed static contacts 2121, a movable contact 2122 with two contact points 21221, and a movable drive member 2123. The two static contacts 2121 are each electrically connected to an external circuit via an electrical connection piece 2125. The electrical connection piece 2125 is also provided with a connector for electrical connection to the external circuit.

[0081] like Figure 21 and Figure 22 As shown, the driving member 2123 includes a protrusion 21231, a first plate 21232, a second plate 21233, a third plate 21234, and a fourth plate 21235. The driving member 2123 is disposed on the side mounting base plate 211. The first plate 21232 and the second plate 21233 are both perpendicularly disposed on one side of the third plate 21234, and the protrusion 21231 is perpendicularly disposed on the other side of the third plate 21234.

[0082] The protrusion 21231 is a rectangular block in the shape of a cuboid. Preferably, a groove is provided on the side of the protrusion 21231 away from the third plate 21234 to reduce the weight of the driving member 2123.

[0083] like Figure 21 and Figure 22 As shown, the fourth plate 21235 is disposed between the first plate 21232 and the second plate 21233, and is perpendicular to the first plate 21232. The fourth plate 21235 is spaced a certain distance from the third plate 21234, which can be adjusted based on actual application. The fourth plate 21235 is generally I-shaped, with protruding posts 21236 located on either side of its center. The fourth plate 21235 is generally bilaterally symmetrical.

[0084] The protruding posts 21236 on either side of the fourth plate 21235 respectively abut the two ends of the movable contact 2122 via two compression springs 2124. Driven by the control shaft 40, the driving member 2123 can move, causing the back of the movable contact 2122 to abut against the top of the stopper 213 and remain stationary. As the driving member 2123 moves downward, the compression springs 2124 compress and store energy. When the centerline of the protruding posts 21236 falls below the resisting surface of the top of the stopper 213, the compressed energy of the compression springs 2124 ceases to be stored and is released. Under this action, the movable contact 2122 rapidly moves upward, causing its two contact points 21221 to abut against the two static contacts 2121, respectively, and electrically connect.

[0085] In the movable contact 2122, the contact bridge 21224 and the two contacts 21221 are riveted together to form an inseparable whole. That is, the two contacts 21221 are provided at both ends of the movable contact 2122, and the contacts 21221 are fastened to the movable contact 2122 by riveting, forming an inseparable whole.

[0086] In one embodiment, Figure 21 As shown, a reaction spring is provided under the second plate body 21233. When the second plate body 21233 loses the pressure of the control button 300, a reaction spring will be provided to the second plate body 21233 to counteract the force applied by the control button 300. Its function is to make the second plate body 21233 automatically return to its initial position. When the control button 300 is pressed to return and the second plate body 21233 is in a maintained state, this reaction spring usually does not need to be installed.

[0087] like Figure 23 As shown, the moving contact 2122 also has a connecting plate 21222, and two contacts 21221 are arranged at both ends of the connecting plate 21222. The middle part of the connecting plate 21222 is also provided with a first avoidance hole 21223 that passes through the connecting plate 21222, which is used to avoid the movement of the driving member 2123, specifically to avoid the fourth plate body 21235, that is, the fourth plate body 21235 can pass through the first avoidance hole 21223.

[0088] Contact bridges 21224 extend in the same direction from both sides of the connecting plate 21222, and the contact bridges 21224 are perpendicular to the connecting plate 21222. Preferably, contact bridges 21224 with the same structure and perpendicular to the plane of the connecting plate 21222 extend upward from both sides of the connecting plate 21222, and the contact bridges 21224 and the connecting plate 21222 are integrally formed.

[0089] The contact bridge 21224 of the connecting plate 21222 is positioned toward the first plate 21232. Protrusions 21225 extend from both ends of the connecting plate 21222 toward the center of the first avoidance hole 21223. The two ends of the compression spring 2124 are respectively sleeved over the protrusions 21225 and the protruding column 21236, thereby achieving abutment between the moving contact 2122 and the driving member 2123.

[0090] Two limiting members 213 are provided corresponding to the two static contacts 2121, and are used to limit the moving stroke of the moving contact 2122, and limit the limit position after disconnection, that is, limit the upper and lower moving positions. A card slot is also provided on the side mounting substrate 211, and the electrical connection piece 2125 and the limiting member 213 are detachably engaged in the card slot. After the first contact sub-unit 21 is installed, the moving contact 2122 rests on the limiting member 213, and the first plate 21232 of the driving member 2123 rests on the side mounting substrate 211. The first contact sub-unit 21 is buckled as a whole on the corresponding installation position of the installation body 113. A first contact sub-unit 21 and a second contact sub-unit 31 are detachably connected to the same installation unit 11 as a group.

[0091] An even number of transmission members 50 are provided, corresponding one-to-one with each contact subunit. They are movably mounted on the mounting unit 11 and are driven by the control shaft 40 or the linkage member 60 to move, thereby driving the corresponding contact subunit's drive member 2123. Specifically, a transmission member mounting hole and a travel hole 115 are provided at one station of the mounting body 113. The transmission member mounting hole is parallel to the shaft hole 114 and has a roughly ⌚-shaped cross-section. The transmission member 50 has a shape corresponding to the transmission member mounting hole and can only move along the length of the transmission member mounting hole.

[0092] The transmission member 50 is provided with a through mounting side hole 51, and the mounting side hole 51 is used for inserting the protrusion 21231. The travel hole 115 is connected to the transmission member mounting hole, and the protrusion 21231 is inserted into the mounting side hole 51 after passing through the travel hole 115.

[0093] Furthermore, the self-locking mechanism contact group 100 further includes a linkage member 60 , a self-locking mounting seat 72 and a return spring 71 .

[0094] The self-locking mechanism 70 is fixed to the mounting base 200 by means of bolts 80. The linkage member 60 is rotatably disposed in the self-locking mechanism 70. The linkage member 60 is used to make the first contact subunit 21 and the second contact subunit 31 move in a linkage manner when being pushed by the control shaft 40. Figure 25 As shown, a second avoidance hole is provided in the middle of the linkage member 60 , and the control shaft 40 is arranged through the second avoidance hole and does not contact the linkage member 60 .

[0095] In addition, the transmission members 50 corresponding to the adjacent contact sub-units are offset. The transmission member 50 is far away from the linkage member 60. In order to achieve the cooperation with the linkage member 60, the contact group 100 also has two cooperation blocks 53. The transmission member 50 also has a cooperation opening 52. The cooperation blocks 53 are stuck on the cooperation opening 52, thereby connecting with the corresponding transmission member 50. The linkage member 60 and the cooperation blocks 53 are spaced apart. Figure 15As shown, the middle portion of the matching block 53 protrudes upward, and grooves are respectively provided on the two side planes of the protruding portion.

[0096] The return spring 71 is used to return the control shaft 40 after being pressed. In this embodiment, the return spring 71 is arranged on the end of the control shaft 40 away from the control button 300 and abuts against the self-locking mechanism 70.

[0097] Specifically, in the initial state, one lateral protrusion 411 corresponds to a first contact subunit 21 and abuts against the transmission member 50 corresponding to the first contact subunit 21 closest to the lateral protrusion 411. The transmission members 50 corresponding to each first contact subunit 21 abut sequentially. At this time, the other lateral protrusion 411 does not correspond to the second contact subunit 31.

[0098] At this time, when the control button 300 is pressed, the lateral protrusion 411 of the control shaft 40 pushes the transmission member 50 of the first contact sub-unit 21 toward the linkage member 60, thereby causing the linkage member 60 to rotate. At this time, the linkage member 60 abuts against the corresponding mating block 53 of the second contact sub-unit 31. The movement of the transmission member 50 of the first contact sub-unit 21 toward the linkage member 60 drives the moving contact 2122 via the drive member 2123. Its two contact points 21221 abut and electrically connect with the two static contacts 2121, thereby connecting all circuits connected to the first contact sub-unit 21. After releasing the control button 300, the reset spring 71 drives the control shaft 40 and the control button 300 to move and reset. When the control shaft 40 resets, it breaks contact with the transmission member 50 of the first contact sub-unit 21.

[0099] When it is necessary to switch all the circuits connected to the first contact sub-unit 21 from the on state to the off state, rotate the control button 300 so that the other lateral protrusion 411 of the control shaft 40 rotates to correspond to the second contact sub-unit 31, and abuts against the transmission member 50 corresponding to the second contact sub-unit 31 closest to the other lateral protrusion 411 of the second contact sub-unit 31, and the transmission members 50 corresponding to each second contact sub-unit 31 abut in turn.

[0100] Afterwards, by pressing the control button 300, the other lateral protrusion 411 of the control shaft 40 pushes the transmission member 50 of the second contact sub-unit 31 to move toward the direction close to the linkage member 60, thereby pushing the linkage member 60 to rotate. During the rotation of the linkage member 60, the transmission member 50 of the first contact sub-unit 21 will be pushed to move away from the linkage member 60. When the transmission member 50 of the second contact subunit 31 moves toward the linkage member 60, it drives the movable contact 2122 via its driver 2123. Its two contacts 21221 abut and electrically connect with the two movable contacts 2122, thus energizing all circuits connected to the second contact subunit 31. When the transmission member 50 of the first contact subunit 21 moves away from the linkage member 60, it drives the movable contact 2122 via its driver 2123. Its two contacts 21221 disengage from the two movable contacts 2122, and the movable contact 2122 abuts against the stopper 213, thus disconnecting all circuits connected to the first contact subunit 21. When the control button 300 is released, the return spring tends to reset the control shaft 40 and the control button 300. During the reset, the control shaft 40 disengages from the transmission member 50 of the second contact subunit 31.

[0101] The above description is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be covered by the scope of protection of the present application.

Claims

1. A self-locking mechanism (70), characterized in that: include: A mounting unit (11) mounted on the bolt (80); A first contact subunit (21) is provided on the mounting unit (11), the first contact subunit (21) comprising two symmetrically distributed static contacts (2121), a dynamic contact (2122) having two contact points, and a driving member (2123), the static contact (2121) being electrically connected to an external circuit via an electrical connection sheet (2125), and two sides of the driving member (2123) respectively abutting against two ends of the dynamic contact (2122) via two compression springs (2124); A control shaft (40) is provided through the mounting unit (11); A transmission member (50) is provided on the mounting unit (11) and is used to move under the push of the control shaft (40) and thereby drive the corresponding driving member (2123) to move; The self-locking mechanism (70) further comprises a linkage member (60), a return spring (71) and a linkage housing. The linkage member (60) is rotatably arranged on the linkage housing. The linkage housing is fixed to the self-locking mounting seat (72) and the mounting seat (200) by the bolts. The return spring (71) is arranged on the control shaft (40) and abuts against the linkage housing.

2. The self-locking mechanism (70) according to claim 1, characterized in that: The self-locking mechanism (70) comprises a second contact subunit (31) provided on the mounting unit (11); the structure of the second contact subunit (31) is the same as that of the first contact subunit (21), and the mounting position is opposite to that of the first contact subunit (21).

3. The self-locking mechanism (70) according to claim 1, characterized in that: The first contact subunit (21) has a side mounting substrate (211) and two limiting members (213); the side mounting substrate (211) is provided on the mounting unit (11); and the limiting members (213) are used to limit the moving stroke of the moving contact (2122).

4. The self-locking mechanism (70) according to claim 3, characterized in that: The side mounting substrate (211) has two lateral protrusions (2111) located on both sides thereof and a bottom groove (2112) located at the bottom thereof; a side of the mounting body (113) of the mounting unit (11) corresponding to the side mounting substrate (211) is provided with two side holes (111) that match the lateral protrusions (2111); the mounting body (113) is provided with a positioning protrusion (112) that matches the bottom groove (2112); the lateral protrusions (2111) are used to be inserted into the side holes (111); and the bottom groove (2112) is used to be inserted into the positioning protrusions (112).

5. The self-locking mechanism (70) according to claim 1, characterized in that: The driving member (2123) has a protruding portion (21231), a first plate (21232), a second plate (21233), a third plate (21234) and a fourth plate (21235), wherein the first plate (21232) and the second plate (21233) are vertically arranged on one side of the third plate (21234), and the fourth plate (21235) is arranged between the first plate (21232) and the second plate (21233), and the protruding column (21236) of the fourth plate (21235) is abutted against the two ends of the moving contact (2122) through the compression spring (2124).

6. The self-locking mechanism (70) according to claim 1, characterized in that: The moving contact (2122) comprises a connecting plate (21222) and two contact points (21221) arranged at both ends of the connecting plate (21222); a first avoidance hole (21223) passing through the middle of the connecting plate (21222) is also provided.

7. The self-locking mechanism (70) according to claim 1, characterized in that: The control shaft (40) comprises a square shaft section (40a) and a circular shaft mounting section (40b); a control push block (41) is sleeved on the circular shaft mounting section (40b); fastening plates (42) are provided on the front and rear sides of the control push block (41); and the fastening plates (42) have lateral openings for being clamped on the circular shaft mounting section (40b).

8. The self-locking mechanism (70) according to claim 1, characterized in that: The transmission member (50) has a matching opening (52) and a matching block (53), the matching block (53) is clamped on the matching opening (52), the linkage member (60) is spaced apart from the matching block (53), and a second avoidance hole is provided in the middle of the linkage member (60).

9. A combined switch (1000), characterized in that: The invention comprises a self-locking mechanism (70), a mounting seat (200), a control button (300) and a shell (400) according to any one of claims 1 to 8, wherein the control button (300) is connected to the control shaft (40) to control the movement or rotation of the control shaft (40), and the shell (400) is sleeved on the outside of the self-locking mechanism (70) and is engaged with the mounting seat (200).

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