CN111863500A - Self-reset switch - Google Patents

Abstract

The application discloses a self-reset switch, which comprises a shell, a transmission unit and a contact unit; the transmission unit comprises a rotating piece, a sliding piece and a wane bracket; the first end of the sliding member is fixed on the shell, and the second end of the sliding member is matched with the surface of the rotating member to limit the moving-in and returning tracks of the rotating member, so that: the rotating member presses one and the other of a first position and a second position of the seesaw bracket, respectively, when moved in two adjacent times, the first position and the second position being located at both sides of the seesaw bracket and causing the contact units to be turned off and on, respectively, when pressed. The self-reset switch disclosed by the application is simple in structure and easy to assemble.

Description

Self-reset switch

Technical Field

The application relates to the technical field of switches, in particular to a self-resetting switch.

Background

A push-button switch is a switch that is manually controlled and can generally be automatically reset, and usually a push button is used to push a transmission mechanism to make or break a movable contact and a stationary contact to achieve circuit switching.

Button switches on the market at present mostly adopt the mode of setting up the wane in conventional switch, make the both ends luffing motion of wane through the pressure effect to make wane and contact or separation, thereby realize the switch-on or the disconnection of power.

However, the structure and assembly process of the switch in the related art are complicated, which results in an increase in the production cost of the switch and a decrease in the production efficiency.

Disclosure of Invention

In view of this, the present application provides a self-resetting switch, which is simple in structure and easy to assemble.

The following technical scheme is specifically adopted in the application:

a self-resetting switch comprises a housing, a transmission unit and a contact unit;

the transmission unit comprises a rotating piece, a sliding piece and a wane bracket;

the first end of the sliding member is fixed to the housing, and the second end of the sliding member is engaged with the surface of the rotating member to restrict the moving and returning trajectories of the rotating member such that:

the rotating member presses one and the other of a first position and a second position of the seesaw bracket, respectively, when moved in two adjacent times, the first position and the second position being located at both sides of the seesaw bracket and causing the contact units to be turned off and on, respectively, when pressed.

Preferably, the surface of the rotating part is provided with a sliding track, the sliding track is a closed loop which is connected end to end, and the projection of the sliding track on a plane perpendicular to the rotating shaft of the rotating part is annular;

the second end of the slider is located within the slide track.

Preferably, the sliding rail includes a first move-in rail, a first return rail, a second move-in rail, and a second return rail;

a first end of the first and second shift-in rails are both distal from the rocker bracket, and a second end of the first and second shift-in rails are both proximal to the rocker bracket;

two ends of the first return track are respectively connected with a first end of the first moving-in track and a second end of the second moving-in track;

both ends of the second returning track are connected with the first end of the second moving-in track and the second end of the first moving-in track respectively.

Preferably, two ends of the first return track are circumferentially spaced by a first angle, two ends of the second return track are circumferentially spaced by a second angle, and the sum of the first angle and the second angle is 360 °.

Preferably, the sliding track comprises a first turning region, a second turning region, a third turning region and a fourth turning region;

the first diverting area is contiguous with the first moving-in track and the second returning track;

the second turnaround area is contiguous with the first return track and the first move-in track;

the third turning area is contiguous with the first return track and the second move-in track;

the fourth diverting area is contiguous with the second move-in track and the second return track;

the first turning region, the second turning region, the third turning region and the fourth turning region are respectively provided with a guide structure, and the guide structures are used for preventing the sliding piece from reversely sliding at the corresponding turning regions.

Preferably, the guide structure is a step, and the height direction of the step is consistent with the sliding direction of the sliding piece.

Preferably, the bottom of the rotating member has a pressing portion extending radially, a first protrusion protruding toward the rotating member is provided at a first position of the seesaw bracket, a second protrusion protruding toward the rotating member is provided at a second position of the seesaw bracket, and the pressing portion presses one of the first protrusion and the second protrusion at a time.

Preferably, the contact unit includes a first contact piece and a second contact piece, and the first contact piece and the second contact piece correspond in position;

the first contact piece is separated from the second contact piece when the first position of the rocker bracket is pressed, and the first contact piece is contacted with the second contact piece when the second position of the rocker bracket is pressed.

Preferably, the self-reset switch further comprises a twisting member, one end of the twisting member is connected with the rocker bracket, and the other end of the twisting member is connected with the first contact piece;

when the first position of the rocker bracket is pressed, the twisting piece is bent towards the first direction, so that the first contact piece is actuated to be far away from the second contact piece; when the second position of the rocker bracket is pressed, the twisting part bends towards the second direction, so that the first contact piece is actuated to contact with the second contact piece, and the first direction and the second direction are opposite in the circumferential direction.

Preferably, the self-reset switch further comprises a key unit, and the key unit is embedded in the shell;

the key unit comprises a key cap and a return element;

the key cap is connected with the rotating part;

the first end of the return element is connected with the key cap, and the second end of the return element is connected with the shell.

Preferably, the inside of the shell is also provided with a rotating part fixing structure;

the rotating part fixing structure comprises a bottom plate and a sleeve, the bottom plate is fixed on the shell, and the sleeve is located in the center of the bottom plate and extends towards the key unit;

the rotating piece is positioned in the sleeve, a blind hole is formed in the inner wall of the sleeve, and the first end of the sliding piece is positioned in the blind hole;

the return element is sleeved on the sleeve, and the second end of the return element is connected with the bottom plate.

The beneficial effects of the embodiment of the application at least lie in:

the self-reset switch provided by the embodiment of the application limits the motion track of the rotating piece in the moving-in and returning process through the matching between the sliding piece and the surface of the rotating piece, so that the rotating piece can press one of the first position and the second position of the rocker bracket in the moving-in process, the position state of the rotating piece is changed in the returning process, the other one of the first position and the second position of the rocker bracket can be pressed in the next moving-in process, and the contact unit can realize the alternate opening and closing of a circuit along with the alternate pressing of the first position and the second position of the rocker bracket. The self-reset switch provided by the embodiment of the application has a simple structure and is easy to assemble.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a self-reset switch according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a self-resetting switch provided in an embodiment of the present application;

FIG. 3 is a front view of a self-resetting switch provided by an embodiment of the present application;

FIG. 4 is a top view of a self-resetting switch provided by an embodiment of the present application;

FIG. 5 is a side view of a self-resetting switch provided by an embodiment of the present application;

FIG. 6 is a perspective view of a rotor according to an embodiment of the present disclosure;

FIG. 7 is a front view of a rotary member provided by an embodiment of the present application;

fig. 8 is an assembly view of a sliding member and a rotating member in the self-resetting switch according to the embodiment of the present application;

fig. 9 is a cross-sectional view of the self-reset switch taken along line B-B of fig. 4, with the self-reset switch in an on state, according to an embodiment of the present application;

FIG. 10 is a cross-sectional view of the self-reset switch taken along line B-B of FIG. 4 with the self-reset switch in an open state according to an embodiment of the present application;

FIG. 11 is a cross-sectional view of the self-resetting switch of the present application taken along line A-A of FIG. 3;

fig. 12 is a schematic structural diagram of a contact unit of a self-resetting switch provided in an embodiment of the present application;

fig. 13 is a cross-sectional view of a housing of a self-resetting switch provided in an embodiment of the present application.

The reference numerals denote:

1. a housing; 11. a first through hole; 12. a second through hole; 13. a rotating member fixing structure; 131. a base plate; 132. a sleeve; 133. a groove;

2. a key unit; 21. a key cap; 22. a return element; 23. a limiting block;

3. a transmission unit;

31. a rotating member; 311. a first column; 312. a second cylinder; 3120. a sliding track; 3121. a first moving-in track; 3122. a first return track; 3123. a second move-in trajectory; 3124. a second return track; 3125. a first steer zone; 3126. a second steer zone; 3127. a third steering zone; 3128. a fourth steering zone; 313. a pressing part;

32. a slider; 321. a traveler; 322. an elastic element;

33. a rocker bracket; 331. a first protrusion; 332. a second protrusion; 333. a third protrusion; 334. a linkage rod; 335. a fourth protrusion; 336. a recessed region;

34. a twisting member;

4. a contact unit; 41. a first contact piece; 411. a recessed portion; 42. a second contact piece; 43. an incoming terminal; 431. a notch; 44. a contact spring; 45. a third contact piece;

5. a base.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the following will describe the embodiments of the present application in further detail with reference to the accompanying drawings.

The embodiment of the application provides a self-reset switch which is usually connected with an electric connection circuit and controls the connection and disconnection of the electric connection circuit. Referring to fig. 1-13, the structure of the self-resetting switch of the embodiment of the present application and its improvements and advantages will be described in detail.

Referring to fig. 1, the self-resetting switch includes a housing 1, a transmission unit 3, and a contact unit 4.

In the embodiment of the present application, the transmission unit 3 and the contact unit 4 may be disposed inside the housing 1 and connected, wherein the transmission unit 3 may receive an actuating force from the outside and move in under the actuating force, and the contact unit 4 may be actuated to be turned on or off each time the transmission unit 3 moves in.

As shown in fig. 1, the transmission unit 3 includes a rotation member 31, a slide member 32, and a paddle bracket 33. The slider 32 has a first end fixed to the housing 1 and a second end engaged with a surface of the rotation member 31 to restrict the moving and returning trajectories of the rotation member 31.

Where "move in" generally refers to the pivotal member 31 moving closer to the rocker bracket 33, and "move back" generally refers to the pivotal member 31 moving away from the rocker bracket 33.

During use of the self-resetting switch, the sliding member 32 is normally fixed to the housing 1 and remains stationary, while the rotating member 31 is movable relative to the housing 1. As the rotating member 31 moves or rotates, the sliding member 32 slides relative to the surface of the rotating member 31, i.e., the second end of the sliding member 32 engaged with the surface of the rotating member 31 limits the movement of the rotating member 31 to some extent, so that the following situation occurs.

The rotating member 31 presses one and the other of the first and second positions of the rocker bracket 33, respectively, when moved in two adjacent times, the first and second positions being located at both sides of the rocker bracket 33 and respectively turning the contact unit 4 off and on when pressed.

As shown in fig. 9 and 10, the rocker bracket 33 is located below the rotating member 31 and relatively rotatably fixed to the housing 1. When the rotator 31 is actuated and moved downward, the bottom of the rotator 31 may contact the top of the paddle bracket 33, and then press the top of the paddle bracket 33. When the actuation of the rotation member 31 is released, the rotation member 31 starts to return, and the return trajectory of the rotation member 31 is restricted due to the engagement between the sliding member 32 and the surface of the rotation member 31, so that the position state of the rotation member 31 after returning is changed, and accordingly, the position pressed on the rocker bracket 33 when the rotation member 31 moves next is changed. For example, fig. 9 shows the self-reset switch in a conducting state, in which the side of the rocker bracket 33 where the first position is located is higher than the side of the second position, and when the rotating member 31 moves downward, the first position of the rocker bracket 33 can be pressed, so that the side of the rocker bracket 33 where the first position is located moves downward, and the side of the second position moves upward, and causes the contact unit 4 to be turned off; fig. 10 shows the self-reset switch in an off state, in which the side of the rocker bracket 33 where the first position is located is lower than the side of the second position, and the second position of the rocker bracket 33 can be pressed when the rotating member 31 moves downward, so that the side of the rocker bracket 33 where the second position is located moves downward, and the side of the first position moves upward, and causes the contact unit 4 to be turned on.

With reference to fig. 1 and fig. 2, the self-resetting switch provided by the embodiment of the present application operates according to the following principle:

(1) if the contact unit 4 is currently in the on state

When the rotation member 31 is actuated, the rotation member 31 moves toward the seesaw bracket 33 and is pressed to the first position of the seesaw bracket 33, so that the first position of the seesaw bracket 33 is gradually brought close to the contact unit 4 and the second position of the seesaw bracket 33 is gradually moved away from the contact unit 4, and the contact unit 4 is turned off due to the above-mentioned swing of the seesaw bracket 33; while the second end of the sliding member 32 is engaged with the surface of the rotating member 31 during the process that the rotating member 31 moves into and presses the first position toward the rocker bracket 33, so that the rotating member 31 can change its position after being deactivated, thereby realizing the second position pressed to the rocker bracket 33 at the next movement.

(2) If the contact unit 4 is currently in the open state

When the rotation member 31 is actuated, the rotation member 31 moves toward the seesaw bracket 33 and presses to the second position of the seesaw bracket 33, and the second position of the seesaw bracket 33 is gradually brought close to the contact unit 4, and the first position of the seesaw bracket 33 is gradually moved away from the contact unit 4, and the contact unit 4 is turned on due to the above-described swing of the seesaw bracket 33; while the second end of the sliding member 32 is engaged with the surface of the rotating member 31 during the process of moving the rotating member 31 into the second position toward the rocker bracket 33, the rotating member 31 can change its position after being deactivated, and the first position of the rocker bracket 33 is pressed when moving in next time.

In summary, the present embodiment provides a self-reset switch with simple structure and easy assembly, which limits the moving track of the rotating member when the rotating member moves in and returns by the cooperation between the sliding member and the surface of the rotating member, so that the rotating member 31 can press one of the first position and the second position of the rocker bracket 33 when moving in, and the position state of itself changes when returning, so that the other one of the first position and the second position of the rocker bracket 33 can be pressed when moving in next time, and as the first position and the second position of the rocker bracket 33 are alternately pressed, the contact unit 4 can be alternately turned off and turned on.

The structure and function of each constituent unit of the self-resetting switch provided in the embodiment of the present application are specifically described below.

Referring to fig. 1 and 2, the housing 1 may have a box-like structure with a hollow interior, and the transmission unit 3 and the contact unit 4 are accommodated in the interior of the housing 1 and are sequentially arranged and connected in the interior of the housing 1.

As shown in fig. 13, in the present embodiment, the opposite side walls of the housing 1 have two opposite second through holes 12. The two opposite side walls of the rocker bracket 33 have two third protrusions 333, the two third protrusions 333 are respectively located in the two opposite second through holes 12, and the third protrusions 333 are adapted to rotate in the second through holes 12.

As shown in fig. 2, the rocker bracket 33 is fixed to the housing 1 by two third protrusions 333, and when the rocker bracket 33 swings, the two third protrusions 333 can rotate in the two second through holes 12, respectively. Alternatively, the rotation axis of the rotation member 31 may pass through the middle point of the connecting line of the two third protrusions 333, so that the user may save more effort when pressing the key unit, improving the use experience of the self-resetting switch. Furthermore, for the aesthetic appearance of the self-resetting switch, it is also possible to have the end surface of the third protrusion 333 flush with the second through hole 12 without protruding or recessing from the side wall of the housing 1.

In some implementations of the embodiments of the present application, the self-reset switch further includes a key unit 2, and the key unit 2 is embedded in the housing 1.

The key unit 2 may be disposed within the housing 1 above the gear unit 3, and configured to actuate the gear unit 3. That is, the key unit 2 can be used as an input source of an actuating force, receive an externally applied actuating force, and transmit the actuating force to the transmission unit 3 connected with the key unit to enable the key unit to move. For example, the rotation member 31 may move into and press the first or second position of the rocker bracket 33 when the key unit 2 is pressed, to turn off or on the contact unit 4, and may also return when the key unit 2 is released.

As shown in fig. 13, the top surface of the housing 1 further has a first through hole 11, and the key unit 2 is located in the first through hole 11. Referring to fig. 2, a portion of the key unit 2 may protrude from the top surface of the housing 1 through the first through hole 11 to facilitate a user to perform a pressing operation. When the key unit 2 is pressed, the part of the key unit 2 protruding from the housing 1 can retract into the housing 1 until the top surface of the key unit 2 is flush with the top surface of the housing 1, or even slightly lower than the top surface of the housing 1.

As shown in fig. 1, the key unit 2 includes a key cap 21 and a return element 22, wherein the key cap 21 is connected to the rotation member 31, and the return element 22 has a first end connected to the key cap 21 and a second end connected to the housing 1.

The size of the key cap 21 is smaller than that of the first through hole 11, so that the upper end of the key cap 21 can pass through the first through hole 11 and protrude out of the top surface of the casing 1, so as to receive an external actuating force. The lower end of the key cap 21 is provided with a plurality of limiting blocks 23 protruding out of the side wall of the key cap 21, and when the key cap 21 is not pressed, the limiting blocks 23 abut against the edge of the first through hole 11, so that the key cap 21 is prevented from reversely separating from the first through hole 11.

The return element 22 is connected to the key cap 21 at a first end and to the housing 1 at a second end, and is configured to return the key cap 21 to a position before being pressed after being pressed. In some embodiments, the return element 22 may be a compression spring.

The key cap 21 is further connected to the rotation member 31 by a screw connection, an adhesive connection, or the like, for example, an adhesive may be coated on the bottom surface of the key cap 21, and the top surface of the rotation member 31 may be adhered to the bottom surface of the key cap 21 after the rotation member 31 is assembled, so that the two are connected as a whole. When the key cap 21 is pressed, the key cap 21 retracts into the housing 1, the return element 22 compresses, and the rotating member 31 moves together with the key cap 21 toward the rocker bracket 33; when the key cap 21 is released, the return element 22 generates a restoring force, which simultaneously moves the key cap 21 and the rotator 31 in a direction away from the rocker bracket 33.

As shown in fig. 13, in some implementations of the embodiments of the present application, the inside of the housing 1 also has a rotation member fixing structure 13. The rotation member fixing structure 13 includes a base plate 131 and a sleeve 132, the base plate 131 is fixed to the housing 1, and the sleeve 132 is located at a central position of the base plate 131 and extends toward the key unit 2. The rotating member 31 is located in the sleeve 132, the inner wall of the sleeve 132 has a blind hole 133, and the first end of the sliding member 32 is located in the blind hole 133; the return element 22 is sleeved on the sleeve 132, and a second end of the return element 22 is connected with the bottom plate 131.

The sleeve 132 and the sliding member 32 are engaged with each other to fix the rotating member 31 in the sleeve 132 in a relatively movable manner, so that the rotating member 31 can be rotated in the sleeve 132 and also can be relatively moved in the axial direction of the sleeve 132. The sliding member 32 is fixed in the blind hole 133, and the sliding member 32 slides relatively on the surface of the rotating member 31 as the rotating member 31 moves or rotates, while restricting the movement pattern of the rotating member 31. During assembly, the sliding member 32 is inserted into the blind hole 133, and then the rotating member 31 is installed in the sleeve 132. Alternatively, in order to improve the strength of the housing 1, it may be of an integrally molded structure.

As shown in fig. 1, in some embodiments of the present application, the self-resetting switch may further include a base 5 adapted to the housing 1, wherein the base 5 is used for closing the opening of the housing 1, so that the key unit 2, the transmission unit 3 and the contact unit 4 are limited inside the housing 1. The base 5 and the shell 1 are usually fixedly connected, for example, non-detachable connection modes such as bonding, welding and the like can be adopted, so that the connection stability between the shell 1 and the base 5 is improved; also can adopt buckle connection, threaded connection and other detachable connection modes, and is convenient for fault maintenance and part replacement of the self-reset switch. The structure of the assembled housing 1 and base 5 is as shown in fig. 2 and 3, the self-reset switch has a small overall size and a compact internal structure.

During the movement of the rotation member 31 in a direction away from the rocker bracket 33, the sliding member 32 is engaged with the surface of the rotation member 31, thereby causing the rotation member 31 to change its position. Referring now to fig. 6-8, the manner of engagement between the slider 32 and the surface of the rotor 31 is illustrated:

in some implementations of the embodiments of the present application, in combination with fig. 6 to 8, the surface of the rotating member 31 has a sliding track 3120, the sliding track 3120 is a closed loop that is connected end to end, a projection of the sliding track 3120 on a plane perpendicular to the rotation axis of the rotating member 31 is in a ring shape, and the second end of the sliding member 32 is located in the sliding track 3120.

The sliding member 32 periodically slides by means of the sliding track 3120 provided on the surface of the rotation member 31. The slider 32 and the slide rail 3120 are configured to limit a moving locus when the rotation piece 31 moves in and returns. The sliding track 3120 may be designed in any form that can perform the above-mentioned limiting function after being engaged with the sliding member 32. For example, as shown in fig. 6 to 8, the sliding track 3120 may be a groove opened on the outer wall of the rotation member 31, in which the second end of the sliding member 32 slides. The groove width of the groove may be slightly larger than the corresponding width of the slider 32 to ensure that the slider 32 will not generate large frictional forces due to contact or collision with the groove walls as it slides within the groove. In order to further reduce the resistance of the slider 32 during sliding, the second end of the slider 32 may be provided with a sliding ball, and the sliding of the slider 32 is achieved by the rolling of the sliding ball. With continued reference to fig. 6-8, in some implementations of embodiments of the present application, the sliding rail 3120 includes a first moving rail 3121, a first returning rail 3122, a second moving rail 3123, and a second returning rail 3124, which are connected in sequence.

Since the rotation piece 31 has two moving states of being relatively close to and far from the rocker bracket, accordingly, the sliding rail 3120 includes two moving-in rails and two returning rails corresponding to the two moving states, respectively, i.e., a first moving-in rail 3121 and a second moving-in rail 3213 through which the slide piece 32 passes when the rotation piece 31 moves in due to being actuated, and a first returning rail 3122 and a second returning rail 3124 through which the slide piece 32 passes when the rotation piece 31 rotates and retreats due to being released.

Wherein the first end of the first and second moving-in rails 3121 and 3123 are both distant from the rocker bracket 33, and the second end of the first and second moving-in rails 3121 and 3123 are both close to the rocker bracket 33. Both ends of the first returning rail 3122 are connected to the first end of the first moving rail 3121 and the second end of the second moving rail 3123, respectively; both ends of the second return rail 3124 are connected to the first end of the second moving-in rail 3123 and the second end of the first moving-in rail 3121, respectively.

The first and second moving-in orbit 3121 and 3123 may be parallel to the rotation axis of the rotation member 31 or may have an angle different from 90 ° and 270 ° with the rotation axis of the rotation member 31.

As shown in fig. 6 to 8, for example, the first moving-in track 3121 and the second moving-in track 3123 are linear tracks parallel to the rotation axis of the rotation member 31, when the rotation member 31 is pressed in the direction of the linear tracks, the movement of the sliding member 32 in the two moving-in tracks is not hindered, the pressing is easy and labor-saving, and the user experience is improved. In the present embodiment, the two linear tracks are equal in length, and the positions of the two linear tracks in the circumferential direction of the rotating member 31 are symmetrical with respect to the rotational axis of the rotating member 31.

In some implementations of embodiments of the present application, both ends of the first return track 3122 are circumferentially spaced apart by a first angle, both ends of the second return track 3124 are circumferentially spaced apart by a second angle, and a sum of the first angle and the second angle is 360 °.

The first return track 3122 and the second return track 1324 are both arc tracks, wherein, as shown in fig. 6 to 8, when the rotation axis of the rotating member 31 is the central axis, the two arc tracks are equal in length, and the first angle and the second angle are also equal and both are 180 °; when the rotating shaft of the rotating member 31 is an eccentric shaft, the lengths of the two arc tracks are not equal, the first angle and the second angle are not equal, but the sum of the first angle and the second angle is still 360 °, so that the purpose that the sliding member 32 can slide on the surface of the rotating member 31 for one circle through the two return tracks every time the rotating member 31 rotates twice is achieved, and thus the self-reset switch can be pressed at any two adjacent times, wherein one time the circuit is conducted, and the other time the circuit is disconnected. Here, the distance between the two ends of the return track in the circumferential direction is an angle, which is an included angle between the two ends of the projection of the two ends of the return track on a plane perpendicular to the rotation axis of the rotating member 31, for example, when the projection of the return track is a semicircle, the included angle is 180 °.

During the sliding of the sliding member 32 in the sliding track 3120, the sliding direction is turned with respect to the key unit 2, and a turning region is defined as a region where the sliding direction of the sliding member 32 is turned with respect to the key unit 2. In some implementations of embodiments of the present application, in conjunction with fig. 6 and 7, the sliding track 3120 includes a first turning region 3125, a second turning region 3126, a third turning region 3127, and a fourth turning region 3128.

That is, the sliding member 32 slides once in the sliding track 3120, and needs to perform four turns, that is, when entering the first return track 3122 from the first moving track 3121, the sliding member 32 changes from moving toward the key unit 2 to moving away from the key unit 2; when entering the second moving-in track 3123 from the first return track 3122, the slider 32 transitions from moving away from the key unit 2 to moving toward the key unit 2; when entering the second return rail 3124 from the second moving-in rail 3123, the slider 32 shifts from moving toward the key unit 2 to moving away from the key unit 2; when entering the first moving-in track 3121 from the second return track 3124, the slider 32 transitions from moving away from the key unit 2 to moving toward the key unit 2. Thus, of the four turning regions corresponding to the above four turning, the first turning region 3125 is contiguous with the first moving track 3121 and the second returning track 3124; the second turning region 3126 interfaces with the first return track 3122 and the first move-in track 3121; the third turning zone 3127 is contiguous with the first return track 3122 and the second move track 3123; the fourth turning region 3128 meets the second moving track 3123 and the second returning track 3124.

In order to smoothly divert the sliding direction into the next track, the first turning region 3125, the second turning region 3126, the third turning region 3127 and the fourth turning region 3128 are provided with a guide structure 3129. The guide structure 3129 serves to prevent the slide 32 from sliding backwards at the corresponding turning area, i.e. only from the track to the next track, and not back along the track. Thus, the slide member 32 can slide in only one end-to-end direction in the slide rail 3120 without performing reverse sliding.

In some implementations of the embodiments of the present application, the guiding structure 3129 is a step, and the height direction of the step is consistent with the sliding direction of the sliding member 32.

Specifically, in the four turning areas, each turning area has at least one step (for example, the step of the first turning area 3125 can be clearly seen in fig. 6), the step is located on the plane where the sliding member slides, and the direction of the step from high to low is consistent with the sliding direction of the sliding member. Taking the example of one step at each turning area, referring to fig. 6 and 7, the first turning area 3125 has a first step, which is lower to meet the first moving-in track 3121 and upper to meet the second returning track 3124; the second turning area 3126 has a second step, which is lower in connection with the first return track 3122 and higher in connection with the first moving track 3121; the third turning region 3127 has a third step, which is lower in connection with the second moving-in track 3123 and upper in connection with the first returning track 3122; the fourth turning area 3128 has a fourth step, the lower of which is connected to the second return track 3124 and the upper is connected to the second moving track 3123. Since the height direction of the step is consistent with the sliding direction of the sliding member, the sliding member 32 can only slide from the height to the lower part of the step, and the sliding member 32 is blocked by the step when sliding in the reverse direction. Accordingly, when a plurality of steps are provided at each turning region, the highest and lowest positions of the plurality of steps are respectively connected to the corresponding sliding rails 3120.

Therefore, the surface of the rotating member 31 and the sliding member 32 are engaged based on the above structure, and the restriction of the moving manner of the rotating member 31 is achieved. Further, the structures of the slider 32 and the rotator 31 may be as follows, respectively.

As shown in fig. 1, in the embodiment of the present application, the slider 32 includes a sliding column 321 and an elastic element 322, a first end of the sliding column 321 is connected to the elastic element 322, a second end of the sliding column 321 is located in the sliding track 3120, and the elastic element 322 is connected to the housing 1, wherein the one end of the sliding column 321 and the elastic element 322 are located in the blind hole 133. The elastic member 322 is a member that receives a vertical load and is deformed accordingly, such as a spring, and the spool 321 can move away from and close to the housing 1 based on the tension and compression of the spring during the rotation of the rotation member 31.

As shown in fig. 6 to 8, in some implementations of the embodiment of the present application, the bottom of the rotating member 31 has a pressing portion 313 extending radially. Here, the pressing part 313 is asymmetrically disposed with respect to the rotation axis of the rotation member 31, so that only one of the first position and the second position of the seesaw bracket 33 may be pressed each time the seesaw bracket 33 is pressed, for example, the pressing part 313 may be disposed at one side of the rotation axis of the rotation member 31.

Fig. 6 to 8 show the structure of one rotating member 31. The rotating member 31 includes a first cylinder 311, a second cylinder 312, and a pressing portion 313. The first cylinder 311 is connected to one end of the second cylinder 312, wherein the sectional size of the first cylinder 311 may be set smaller than that of the second cylinder 312, thereby reducing the self weight of the self-resetting switch and saving materials. The second cylinder 312 is a cylinder having a sliding track 3120 on its surface. The pressing portion 313 is connected to an end of the second cylinder 312 far away from the first cylinder 311, and protrudes to one side of the surface of the second cylinder 312 along a connecting line of midpoints of the first return track 3122 and the second return track 3124. When the rotation member 31 is rotated, the pressing parts 313 are rotated from one side of the rotation shaft to the other side to press different positions of the seesaw brackets 33, respectively.

As shown in fig. 9 and 10, the seesaw bracket 33 has a first protrusion 331 protruding toward the rotation member 31 at a first position, and the seesaw bracket 33 has a second protrusion 332 protruding toward the rotation member 31 at a second position, and the pressing part 313 presses one of the first protrusion 331 and the second protrusion 332 at a time.

The distance between the first and second protrusions 331 and 332 of the rocker bracket 33 is greater than the diameter of the second cylinder 312 and less than the diameter of the circumferential rotation trajectory of the pressing part 313, thereby ensuring that the pressing part 313 can press only one of the first and second protrusions 331 and 332 at a time. As shown in fig. 9 and 10, a recess 336 is formed between the first protrusion 331 and the second protrusion 332, and during the returning of the rotating member 31, the pressing member 313 rotates from a position corresponding to the first protrusion 331 to a position corresponding to the second protrusion 332 while passing through the recess 336 between the first protrusion 331 and the second protrusion 332, and the pressing member 313 does not contact the paddle holder 33 when rotating in the recess 336, and thus is not subjected to the resistance of the paddle holder 33.

Alternatively, as shown in fig. 11, corners of the first protrusion 331 and the second protrusion 332 are rounded, so as to facilitate smooth transition of the pressing portion 313 between the first protrusion 331 and the second protrusion 332. In a natural state, the pressing portion 313 does not contact the first protrusion 331 and the second protrusion 332, that is, when the first position of the rocker bracket 33 is higher than the second position, a gap is formed between the pressing portion 313 and the first protrusion 331, and when the second position of the rocker bracket 33 is higher than the first position, a gap is formed between the pressing portion 313 and the second protrusion 332.

In the embodiment of the present application, the self-reset switch realizes connection to the circuit through the contact unit 4. As shown in fig. 9 and 10, in some implementations of the embodiments of the present application, the contact unit 4 includes a first contact piece 41 and a second contact piece 42, and the positions of the first contact piece 41 and the second contact piece 42 correspond. The first contact piece 41 is separated from the second contact piece 42 when the first position of the rocker bracket 33 is pressed, and the first contact piece 41 is in contact with the second contact piece 42 when the second position of the rocker bracket 33 is pressed. The first contact piece 41 and the second contact piece 42 are both made of conductor materials, the first contact piece 41 is a movable contact piece, the second contact piece 42 is a static contact piece, electric power conduction is achieved when the first contact piece 41 and the second contact piece 42 are in contact, and electric power disconnection is achieved when the first contact piece and the second contact piece are separated.

The first contact piece 41 and the second contact piece 42 are contacted or separated along with the swing of the rocker bracket 33, and can be realized based on the following structure:

in some implementations of embodiments of the present application, as shown in fig. 9-11, the self-resetting switch further includes a twisting member 34, and one end of the twisting member 34 is connected to the rocker bracket 33 and the other end is connected to the first contact piece 41. Wherein, when the first position of the rocker bracket 33 is pressed, the twisting member 34 is bent towards the first direction, thereby actuating the first contact piece 41 away from the second contact piece 42; when the second position of the rocker bracket 33 is pressed, the torsion element 34 is bent in a second direction, which first and second directions are circumferentially opposite, thereby actuating the first contact piece 41 to contact the second contact piece 42.

In the embodiment of the present application, the twisting member 34 may be a coil spring, and the coil spring is always compressed in the housing 1 (i.e. the coil spring has a certain deformation, but does not reach the maximum deformation), so that the first contact piece 41 is always pressed, and only the direction and position of the pressing force are different because the bending direction of the coil spring is different, so that the first contact piece 41 is relatively stably swung and is in a static state. The coil spring and the rocker bracket 33 may be fixedly connected for ease of assembly; or can be detachably connected so as to facilitate the replacement of the coil spring.

Fig. 9 shows a self-resetting switch in a conducting state. In fig. 9, the pressing portion 313 of the rotating member 31 corresponds to the first protrusion 331 of the rocker bracket 33, the first protrusion 331 is away from the contact unit 4, the second protrusion 332 is close to the contact unit 4, the twisting member 34 is being bent in the second direction, and the first contact piece 41 is in contact with the second contact piece 42.

Fig. 10 shows a self-resetting switch in the off state. In fig. 10, the pressing portion 313 of the rotating member 31 corresponds to the second protrusion 332 of the rocker bracket 33, the first protrusion 331 is close to the contact unit 41, the second protrusion 332 is far from the contact unit 4, the twisting member 34 is being bent in the first direction, and the first contact piece 41 is separated from the second contact piece 42.

As shown in fig. 9 and 10, the first contact piece 41 further has a recessed portion 411 recessed in a direction away from the rocker bracket 33, one end of the torsion member 34 is located in the recessed portion 411, and a supporting point at which the first contact piece 41 swings is located outside the recessed portion 411 away from the torsion member 34.

Referring to fig. 12, contact unit 4 further includes a line terminal 43, line terminal 43 being a conductive material. The wire inlet terminal 43 has a notch 431 opening toward the twisting member 34, the first contact piece 41 crosses the wire inlet terminal 43 through the notch 431, and the outer side of the recess 411 away from the twisting member 34 is connected with the bottom of the notch 431, and the connection point is the supporting point for the first contact piece 41 to swing.

Also shown in fig. 9 and 10 is the cross-sectional configuration of first contact 41, and it can be seen that recessed portion 411 of first contact 41 has a W-shape, wire inlet terminal 43 is connected to a central portion of recessed portion 411, and portions of recessed portion 411 on both sides of wire inlet terminal 43 are lower than the connection of wire inlet terminal 43 to first contact 41, thereby improving the stability of connection between first contact 41 and wire inlet terminal 43 under the pressure of torsion member 34.

In some embodiments of the present application, as shown in fig. 12, an H-shaped plate is further disposed between the first contact piece 41 and the twisting member 34, and two opposite edges of the notch 431 are embedded in two grooves of the H-shaped plate, so that the connection stability of the first contact piece 41 and the notch 431 is enhanced. The middle position of the H-shaped plate is provided with a bulge facing the twisting piece 34, and the other end of the twisting piece 34 is connected to the periphery of the bulge, so that the twisting piece 34 is effectively prevented from slipping off the H-shaped plate. As shown in fig. 9 and 10, when the twisting member 34 is a coil spring, the lower end of the coil spring is sleeved on the periphery of the protrusion and is not fixedly connected to the H-shaped plate. The loose connection here includes both a detachable connection and a movable connection, i.e. the helical spring can be detached from the H-shaped plate and can also move slightly relative to the H-shaped plate.

With continued reference to fig. 9 and 10, in the embodiment of the present application, the rocker bracket 33 may further have a linkage 334 extending toward the contact unit 4, the twisting member 34 is sleeved on the linkage 334, and the length of the linkage 334 is smaller than that of the twisting member 34. When the rocker bracket 33 swings, the linkage 334 swings, and the lower end of the linkage 334 applies force to the inner side of the twisting member 34, so that the twisting member 34 is actuated to bend at the stressed position, and looks like "twisting". Along with the change of the bending direction of the twisting element 34, the force application direction and the force application position of the twisting element to the first contact piece 41 are also changed, so that the first contact piece 41 swings under the pressure action in different directions and positions, and is contacted with or separated from the second contact piece 42.

In some embodiments of the present application, an indicator light may also be provided to indicate the on-off state of the self-resetting switch. As shown in fig. 9 and 10, the rocker bracket 33 also has a fourth protrusion 335 protruding toward the contact unit 4, the fourth protrusion 335 being located on the same side of the rotation axis as the second protrusion 332. The contact unit 4 further includes a third contact 45 and a contact spring 44 connected to the indicator, wherein the third contact 45 is located on the opposite side of the first contact 41 from the second contact 42, one end of the contact spring 44 is connected to the third contact 45, and the other end extends in the direction of the fourth protrusion 335, so that when the first contact 41 is connected to the second contact 42, the fourth protrusion 335 can be connected to the other end of the contact spring 44 (as shown in fig. 9), thereby illuminating the indicator; when the first contact piece 41 is separated from the second contact piece 42, the fourth protrusion 335 may be separated from the contact spring 44 (as shown in fig. 10), thereby turning off the indicator lamp. When the indicator light is present, the fourth protrusion 335 is made of a conductive material, and the fourth protrusion 335 is electrically connected to the first contact piece 41.

As shown in fig. 12, when the self-reset switch provided in the embodiment of the present application has a base 5, three sets of mounting grooves are provided on the base 5, the second contact 42, the wire inlet terminal 43, and the third contact 45 are respectively fixed on the base 5 through one set of mounting grooves, and the wire inlet terminal 43 and the first contact 41 are located at a position between the second contact 42 and the third contact 45. The assembled self-resetting switch is constructed as shown in fig. 4-5, with the terminal 43 protruding from the first side wall of the housing 1 for connection to an external power source; the second contact piece 42 and the third contact piece 45 protrude out of the second side wall of the shell 1, the first side wall is opposite to the second side wall, the second contact piece 42 and the third contact piece 45 together form an outlet terminal of the self-reset switch, and the outlet terminal is used for being connected with an external electrical appliance.

To sum up, the working principle of the self-resetting switch provided by the embodiment of the application is as follows:

(1) if the current self-reset switch is in the conducting state as shown in FIG. 9

When pressure is applied to the key cap 21, the return element 22 is compressed, the key cap 21 and the rotating member 31 move together towards the rocker bracket 33 until the pressing portion 313 presses the first protrusion 331 of the rocker bracket 33 to be close to the contact unit 4, the twisting member 34 is gradually bent towards the first direction, so that the first contact piece 41 is separated from the second contact piece 42, and the circuit is disconnected; the fourth protrusion 335 is separated from the contact spring 44 and the indicator light is turned off; in this process, the slider 32 (not shown in the drawings) gradually slides from the end of the first moving-in rail 3121 away from the key cap 21 to the end close to the key cap 21 and enters the low of the second stepped structure.

When the pressure is stopped to be applied and the key cap 21 is released, the key cap 21 and the rotating member 31 are restored to the positions before being pressed together under the action of the restoring force of the restoring element 22, and the limiting block 23 abuts against the edge of the first through hole 11; during the returning process of the rotating member 31, the sliding member 32 (not shown) slides in the first returning track 3122 and enters the lower portion of the third step, so that the position state of the rotating member 31 changes, and the pressing portion 313 corresponds to the second protrusion 332.

(2) If the current self-reset switch is in the off state as shown in FIG. 10

When pressure is applied to the key cap 21, the return element 22 is compressed, the key cap 21 and the rotating member 31 move together towards the rocker bracket 33 until the pressing portion 313 presses the second protrusion 332 of the rocker bracket 33 to be close to the contact unit 4, the torsion member 34 is gradually bent towards the second direction, so that the first contact piece 41 is in contact with the second contact piece 42, and the circuit is conducted; the fourth protrusion 335 is in contact with the contact spring 44 and the indicator light is on; in this process, the slider 32 (not shown in the drawings) gradually slides from the end of the second moving-in rail 3123 away from the key cap 21 to the end close to the key cap 21 and enters the low of the fourth step structure.

When the pressure is stopped to be applied and the key cap 21 is released, the key cap 21 and the rotating member 31 are restored to the positions before being pressed together under the action of the restoring force of the restoring element 22, and the limiting block 23 abuts against the edge of the first through hole 11; during the returning of the rotating member 31, the sliding member 32 (not shown) slides in the second returning track 3124 and enters the lower portion of the first step, so that the position state of the rotating member 31 changes, and the pressing portion 313 corresponds to the first protrusion 331.

In summary, the self-reset switch provided in the embodiment of the present application, through the cooperation of the sliding member 32 and the surface of the rotating member 31, the rotating member 31 can advance to press one of the first protrusion 331 and the second protrusion 332 of the rocker bracket 33 when being actuated by the key unit 2, and can rotate and retreat when the key unit 2 is released, so that the other of the first protrusion 331 and the second protrusion 332 of the rocker bracket 33 can be pressed when the rotating member 31 is actuated by the key unit 2 next time, and as the first protrusion 331 and the second protrusion 332 of the rocker bracket 33 are alternately pressed, the first contact piece 41 and the second contact piece 42 are alternately contacted and separated, thereby alternately opening and conducting the circuit. Therefore, the self-reset switch provided by the embodiment of the application realizes the alternate on-off control of the circuit only through the matching of the rotating piece and the sliding piece, and is simple in structure and easy to assemble.

In the present application, it is to be understood that the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The above description is only for facilitating the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (11)

1. A self-resetting switch, characterized in that it comprises a housing (1), a transmission unit (3) and a contact unit (4);

the transmission unit (3) comprises a rotating piece (31), a sliding piece (32) and a wane bracket (33);

the first end of the sliding piece (32) is fixed on the shell (1), and the second end of the sliding piece is matched with the surface of the rotating piece (31) to limit the moving-in and returning tracks of the rotating piece (31), so that:

the rotating member (31) presses one and the other of a first position and a second position of the rocker bracket (33) when moving in two adjacent times, respectively, the first position and the second position being located on both sides of the rocker bracket (33) and causing the contact unit (4) to be opened and closed when pressed, respectively.

2. The self-resetting switch according to claim 1, characterized in that the surface of the rotary piece (31) has a sliding track (3120), the sliding track (3120) is a closed circuit connected end to end and the projection of the sliding track (3120) on a plane perpendicular to the rotation axis of the rotary piece (31) is circular;

the second end of the slide (32) is located within the slide track (3120).

3. The self-resetting switch according to claim 2, wherein the sliding track (3120) comprises a first move-in track (3121), a first return track (3122), a second move-in track (3123), and a second return track (3124);

a first end of the first moving-in rail (3121) and a first end of the second moving-in rail (3123) are both distant from the seesaw bracket (33), and a second end of the first moving-in rail (3121) and a second end of the second moving-in rail (3123) are both close to the seesaw bracket (33);

both ends of the first returning track (3122) are connected to a first end of the first moving-in track (3121) and a second end of the second moving-in track (3123), respectively;

both ends of the second returning track (3124) are connected to the first end of the second moving-in track (3123) and the second end of the first moving-in track (3121), respectively.

4. A self-resetting switch according to claim 3, wherein both ends of the first return track (3122) are circumferentially spaced apart by a first angle and both ends of the second return track (3124) are circumferentially spaced apart by a second angle, the sum of the first and second angles being 360 °.

5. Self-resetting switch according to claim 3, characterized in that the sliding track (3120) comprises a first steering zone (3125), a second steering zone (3126), a third steering zone (3127) and a fourth steering zone (3128)

The first turning area (3125) is contiguous with the first moving track (3121) and the second returning track (3124);

the second turning area (3126) is contiguous with the first return track (3122) and the first moving track (3121);

the third turning area (3127) is contiguous with the first return track (3122) and the second moving track (3123);

the fourth turning area (3128) is bordered by the second moving track (3123) and the second returning track (3124);

the first turning region (3125), the second turning region (3126), the third turning region (3127) and the fourth turning region (3128) each have a guide structure (3129) at the guide structure (3129) for preventing the slide (32) from sliding reversely at the corresponding turning region.

6. The self-resetting switch according to claim 5, wherein the guiding structure (3129) is a step, and the height direction of the step coincides with the sliding direction of the sliding member (32).

7. A self-resetting switch according to claim 1, characterized in that the bottom of the rotary member (31) has a radially extending pressing portion (313);

a first protrusion (331) protruding toward the rotation member (31) is provided at a first position of the seesaw bracket (33), and a second protrusion (332) protruding toward the rotation member (31) is provided at a second position of the seesaw bracket (33);

the pressing portion (313) presses one of the first protrusion (331) and the second protrusion (332) at a time.

8. Self-resetting switch according to claim 1, characterized in that the contact unit (4) comprises a first contact (41) and a second contact (42), the positions of the first contact (41) and the second contact (42) corresponding;

the first contact piece (41) is separated from the second contact piece (42) when the first position of the rocker bracket (33) is pressed, and the first contact piece (41) is contacted with the second contact piece (42) when the second position of the rocker bracket (33) is pressed.

9. A self-resetting switch according to claim 8, further comprising a toggle member (34), one end of the toggle member (34) being connected to the rocker bracket (33) and the other end being connected to the first contact (41);

wherein, when the first position of the rocker bracket (33) is pressed, the twisting piece (34) is bent towards the first direction, thereby actuating the first contact piece (41) to be far away from the second contact piece (42); when the second position of the rocker bracket (33) is pressed, the twisting member (34) is bent in a second direction, so that the first contact piece (41) is actuated to contact the second contact piece (42), and the first direction and the second direction are opposite in the circumferential direction.

10. Self-resetting switch according to claim 1, characterized in that it further comprises a key unit (2), said key unit (2) being embedded in said housing (1);

the key unit (2) comprises a key cap (21) and a return element (22);

the key cap (21) is connected with the rotating piece (31);

the first end of the return element (22) is connected with the key cap (21), and the second end of the return element is connected with the shell (1).

11. Self-resetting switch according to claim 10, characterized in that the housing (1) has also a rotary piece fixing structure (13) inside;

the rotating part fixing structure (13) comprises a bottom plate (131) and a sleeve (132), the bottom plate (131) is fixed on the shell (1), and the sleeve (132) is located at the center of the bottom plate (131) and extends towards the key unit (2);

the rotating piece (31) is positioned in the sleeve (132), a blind hole (133) is formed in the inner wall of the sleeve (132), and the first end of the sliding piece (32) is positioned in the blind hole (133);

the return element (22) is sleeved on the sleeve (132), and the second end of the return element (22) is connected with the bottom plate (131).

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