Rotary switch
By setting the moving contact pad inside the static contact pad in the rotary switch, and using the handle, the positioning structure and the spring mechanism, the reliable contact and disconnection between the static contact pad is ensured, which solves the circuit failure caused by insufficient rebound force of the static contact pad, and realizes the stability and safety of the circuit.
Patent Information
- Application Number
- CN202422267275.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In existing rotary switches, the moving contact plate is prone to insufficient rebound force after frequent use, which leads to inability to effectively communicate with the static contact plate, resulting in circuit failure.
A rotary switch is designed, and the moving contact piece is arranged on the inside of the static contact piece, and the contact piece is pushed outward through the handle top to contact the static contact piece. The clamping structure and spring mechanism are used to ensure that each top push stroke is consistent. Combined with the torsion spring and the convex positioning structure, the reliable contact and disconnection of the static contact piece is achieved.
It effectively avoids circuit failure caused by insufficient rebound force of the moving contact plate, ensures circuit stability, and avoids electric sparks through instant reset and disconnection.
Smart Images
Figure CN223079022U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switches, in particular to a rotary switch. Background Art
[0002] A rotary switch is a switch that controls the on-off of the main contacts by rotating a handle. The rotary switch consists of a main shaft or "rotor" with contact arms or "spokes", and the contact arms or "spokes" protrude from its surface like cams. It has a set of terminal blocks and fixed and moving contact piece groups. The moving contact piece elastically abuts against the outside of the corresponding fixed contact piece to conduct the circuit, and the "spoke" can be used to disconnect the moving contact arm from the corresponding fixed contact arm to disconnect the circuit. Most of the moving contact pieces of this structure are made of metal elastic pieces. When the rotary switch is used frequently, the moving contact piece may not rebound to abut against the fixed contact piece, resulting in circuit failure. Content of the Utility Model
[0003] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a rotary switch, in which the handle pushes the moving contact piece outwards to make contact with the fixed contact piece.
[0004] The technical solution of the utility model: A rotary switch includes a switch housing, a handle and a fixed and moving contact piece group I. The handle is rotatably connected to the switch housing and is provided with a clamping structure. The fixed contact piece is fixed inside the switch housing and has a fixed contact point. One end of the moving contact piece is connected to the switch housing and the other end has a moving contact point. The moving contact piece is arranged inside the corresponding fixed contact piece and can be pushed outwards by the handle to make contact with the fixed contact piece. The moving contact piece can elastically reset inwards to disconnect from the fixed contact piece. The clamping structure includes a roller arranged on the handle and a rail surface on the switch housing. The rail surface is also provided with a plurality of clamping grooves on the circumference that can allow the roller to be inserted, and the roller is pressed into the clamping grooves by a first spring.
[0005] By adopting the above technical solution, the moving contact piece is arranged inside the corresponding fixed contact piece. The handle pushes the moving contact piece outwards to make the moving and fixed contact pieces in contact. Since the stroke of the handle pushing the moving contact piece each time is the same, it can ensure the effective contact of the moving and fixed contact pieces, thus avoiding the situation that the circuit fails due to the insufficient resilience of the moving contact piece in the existing design and the inability to make contact with the fixed contact piece.
[0006] When the handle rotates, the roller will switch between a plurality of clamping grooves, having an operating feel.
[0007] Preferably, the circumferential surface of the handle located inside the switch housing has protrusions and concave positions. The moving contact piece also has a contact bridge for inserting into the concave position or abutting against the surface of the protrusion. The contact bridge is bent inwards from the middle of the moving contact piece towards the handle side. The protrusion bulges relative to the concave position. When the contact bridge abuts against the surface of the protrusion, the protrusion will push it outwards; when the contact bridge corresponds to the concave position, there is a space for the moving contact piece to move inwards.
[0008] Preferably, a second spring is further provided to drive the moving contact piece inward to disconnect from the static contact piece. The second spring is arranged between the outer side of the contact bridge and the switch housing. Adding the second spring against the contact bridge enables the moving contact to instantaneously reset and disconnect, without generating electric sparks.
[0009] Preferably, a placement groove one for accommodating the second spring is provided on the inner wall of the switch housing. Longitudinal rib plates are provided in the placement groove one. The rib plates are inserted between adjacent coils of the second spring to connect and position the spring. One end of the spring abuts against the inwardly bent contact bridge, and the other end abuts against the placement groove. Moreover, the rib plates are used for connection and positioning, which can prevent the spring from loosening.
[0010] Preferably, each positioning groove is in a "V" shape, and an arc surface is also provided for transition between adjacent positioning grooves. This facilitates the shaping of the roller on the rail surface to smoothly switch between each positioning groove.
[0011] Preferably, a receiving groove for inserting the handle is provided at the center of the switch housing. The rail surface is arranged on the circumferential groove wall of the receiving groove. A placement groove two is provided on the outer circumference of the handle, and the roller is radially slidably arranged in the placement groove two.
[0012] Preferably, a first protrusion and a second protrusion separated by an inward concave position are provided on the circumferential surface of the handle. A torsion spring is also sleeved on the handle. The first torsion leg of the torsion spring is clamped on the handle, and the second torsion leg is inserted into the moving groove of the switch housing. A limiting surface for abutting against the second torsion leg is provided on one side of the moving groove.
[0013] When the handle is rotated forward to be turned on, the first protrusion turns towards the contact bridge to make the moving and static contact pieces in contact. At this time, the second torsion leg of the torsion spring will slide away from the limiting surface side in the moving groove, and the torsion spring does not function at this time. It is necessary to manually rotate the handle back. The contact bridge of the moving contact piece will insert into the inward concave position to disconnect from the static contact piece.
[0014] When the handle is rotated backward to be turned on, the second protrusion turns towards the contact bridge to make the moving and static contact pieces in contact. At this time, the second torsion leg of the torsion spring will press against the limiting surface to have an elastic force for driving the handle to rotate back to the reset position. After the handle is released at this time: due to the spring reset of the torsion spring, it can drive the handle to automatically rotate back, making the contact bridge of the moving contact piece insert into the inward concave position to disconnect from the static contact piece.
[0015] Preferably, the handle and the switch housing are matched by a convex block and a limiting groove. The convex block rotates in the limiting groove, and the two end groove walls of the limiting groove abut against the convex block to limit the continuous rotation of the handle. The convex block can also facilitate the clamping of the first torsion leg.
[0016] Preferably, the switch housing has a detachable upper cover and a lower housing. The static contact piece and the moving contact piece are installed on the lower housing, and the rail surface is also arranged on the lower housing. The moving groove and the limiting groove are provided on the inner top wall of the upper cover.
[0017] Preferably, it further includes a second static and dynamic contact group, and the second static and dynamic contact group and the first static and dynamic contact group are symmetrically arranged on both sides of the handle. Multiple static and dynamic contact groups can be respectively connected to connect different circuits. Brief Description of the Drawings
[0018] Figure 1 It is the internal structure diagram of a specific embodiment of the present invention;
[0019] Figure 2 It is the internal structure diagram of the lower shell of a specific embodiment of the present invention;
[0020] Figure 3 It is the structure diagram of the upper cover of a specific embodiment of the present invention;
[0021] Figure 4 It is the cooperation diagram of the handle and the static and dynamic contact group of a specific embodiment of the present invention;
[0022] Figure 5 It is the structure diagram of the static and dynamic contact group of a specific embodiment of the present invention;
[0023] Figure 6 It is the structure diagram of the handle of a specific embodiment of the present invention;
[0024] Figure 7 It is the structure diagram of the lower shell of a specific embodiment of the present invention;
[0025] Figure 8 It is one of the state diagrams of multiple connection pins of a specific embodiment of the present invention;
[0026] Figure 9 It is the second state diagram of multiple connection pins of a specific embodiment of the present invention;
[0027] Figure 10 It is the third state diagram of multiple connection pins of a specific embodiment of the present invention;
[0028] In the figure: switch housing 1, upper cover 1a, lower shell 1b, first placement groove 11, rib 111, receiving groove 12, activity groove 13, limiting surface 131, handle 2, protrusion 21, first protrusion 21a, second protrusion 21b, concave position 22, second placement groove 23, first static and dynamic contact group 3, static contact 31, static contact point 311, dynamic contact 32, dynamic contact point 321, abutting bridge 322, roller 41, rail surface 42, clamping groove 421, arc surface 422, first spring 43, second spring 5, torsion spring 6, first torsion foot 61, first torsion foot 62, convex block 71, clamping groove 711, limiting groove 72, groove wall 721, second static and dynamic contact group 8, connection pin A. Detailed Description of the Embodiment
[0029] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0030] As Figures 1-10 shown, a rotary switch of the present invention includes a switch housing 1, a handle 2, and a set of static and dynamic contact pieces 3. The switch housing 1 also has a connection terminal A for wiring, which can be a two-position connection terminal, a three-position connection terminal, or a four-position connection terminal. The connection terminal can be in a horizontal, vertical, or side-standing state. The handle 2 is rotatably connected to the switch housing 1 and is provided with a positioning structure. The set of static and dynamic contact pieces 3 includes a static contact piece 31 and a dynamic contact piece 32. The static contact piece 31 is fixed inside the switch housing 1 and has a static contact point 311. One end of the dynamic contact piece 32 is connected to the switch housing 1, and the other end has a dynamic contact point 321. The dynamic contact piece 32 is disposed inside the corresponding static contact piece 31. The handle 2 has a protrusion 21 and a concave position 22 on the circumferential surface inside the switch housing 1. The concave position is recessed relative to the protrusion. The dynamic contact piece 32 also has a contact bridge 322 for inserting into the concave position 22 or abutting against the surface of the protrusion 21. The contact bridge 322 is bent inward from the middle of the dynamic contact piece 32 toward the handle 2 side, and the contact bridge 322 is in a "V" shape structure. After the handle 2 rotates, the protrusion 21 on the handle 2 can abut against the contact bridge 322, thereby pushing the dynamic contact piece 32 outward to make contact with the static contact piece 31; when the concave position 22 on the handle 2 corresponds to the contact bridge 322, the dynamic contact piece 32 has a space for inward movement, and due to its own elasticity, it can be reset inward to disconnect from the static contact piece 31. There is also a second spring 5 that can drive the dynamic contact piece 32 inward to disconnect from the static contact piece 31. The second spring 5 is disposed between the outer side of the contact bridge 322 and the switch housing 1. On the inner wall of the switch housing 1, there is a placement groove 11 for accommodating the second spring 5. The placement groove 11 has a longitudinal rib 111, and the rib 111 is inserted into the adjacent two spring coils of the second spring 5 to connect and position the spring.
[0031] In the present invention, by disposing the dynamic contact piece 32 inside the corresponding static contact piece 31, the protrusion 21 of the handle 2 can push the dynamic contact piece 32 outward to make the dynamic and static contact pieces in contact. Since the stroke of the handle 2 pushing the dynamic contact piece 32 each time is the same, it can ensure effective contact between the dynamic and static contact pieces, thereby avoiding the situation where the circuit fails due to insufficient resilience of the dynamic contact piece in the existing design and the inability to make contact with the static contact piece.
[0032] When the contact bridge 322 corresponds to the concave position 22, there is a space for the dynamic contact piece 32 to move inward. Adding the second spring 5 abutted against the contact bridge 322 makes the dynamic contact point 321 reset instantaneously and disconnect, without generating electric sparks.
[0033] Specifically, the circumferential surface of the handle 2 has a plurality of protrusions, including a first protrusion 21a and a second protrusion 21b. The adjacent sides of the first protrusion 21a and the second protrusion 21b are separated by a concave position 22, which can be used for the insertion of the contact bridge of the moving contact in the first set of moving and static contact pieces; the opposite sides of the first protrusion 21a and the second protrusion 21b are also separated by another concave position 22, which can be used for the insertion of the contact bridge of the moving contact in the second set of moving and static contact pieces. The second set of moving and static contact pieces 8 and the first set of moving and static contact pieces 3 are symmetrically arranged on both sides of the handle 2 and have the same structure. The second set of moving and static contact pieces 8 also has a moving contact and a static contact, and the moving contact is arranged inside the static contact; a torsion spring 6 is also sleeved on the handle 2. The first torsion leg 61 of the torsion spring 6 is clamped on the handle 2, and the second torsion leg 62 is inserted into the moving groove 13 of the switch housing 1. One side of the moving groove 131 has a limiting surface 131 that abuts against the second torsion leg 62.
[0034] When the handle 2 is rotated clockwise to be turned on, the first protrusion 21a turns to abut against the contact bridge 322 to make the moving and static contacts in contact, and the second torsion leg 62 of the torsion spring 6 will slide away from the limiting surface 131 in the moving groove 13;
[0035] When the handle 2 is rotated counterclockwise to be turned on, the second protrusion 21b turns to abut against the contact bridge 322 to make the moving and static contacts in contact, and the second torsion leg 62 of the torsion spring 6 will press against the limiting surface 131 to have an elastic force to drive the handle 2 to rotate back to the reset position. The clockwise rotation is the forward rotation, and the counterclockwise rotation is the reverse rotation. Of course, it can also be that the clockwise rotation is the counterclockwise rotation.
[0036] Specifically, a convex block 71 and a limiting groove 72 are further provided between the handle 2 and the switch housing 1. The convex block 71 rotates in the limiting groove 72, and the two end groove walls 721 of the limiting groove 72 abut against the convex block 71 to limit the further rotation of the handle 2. The convex block 71 is integrally provided on the handle, and the limiting groove is provided on the switch housing. The convex block 71 also has a card slot 711 for the first torsion leg 61 to be inserted. Of course, it can also be that the convex block 71 is provided on the switch and the limiting groove is provided on the handle. Specifically, the switch housing 1 has a detachable upper cover 1a and a lower housing 1b. The upper cover 1a and the lower housing 1b are connected by screws or snap connections. The static contact 31 and the moving contact 32 are installed on the lower housing 1b, and the rail surface 42 is also provided on the lower housing 1b. The inner top wall of the upper cover 1a has the moving groove 13 and the limiting groove 72. Both the moving groove 13 and the limiting groove 72 are arc-shaped.
[0037] Specifically, the card position structure includes a roller 41 provided on the handle 2 and a rail surface 42 on the switch housing 1. The roller 41 is spherical or ball-columnar. The rail surface 42 further has a plurality of card slots 421 on the circumference for the roller 41 to be inserted into. The roller 41 is pressed into the card slot 421 by a first spring 43. Each card slot 421 is in a "V" shape, and two adjacent card slots 421 are also transitioned by an arc surface 422. The center of the switch housing 1 has a receiving slot 12 for the handle 2 to be inserted. The rail surface 42 is provided on the circumferential groove wall of the receiving slot 12. A second placement slot 23 is provided on the outer circumference of the handle 2, and the roller 41 is radially slidably provided in the second placement slot 23. Two rollers are symmetrically provided and are both movably provided in the second placement slot 23. The first spring 43 is provided in the second placement slot 23 and abuts between the two rollers; or one end of the first spring abuts against the roller and the other end abuts against the bottom wall of the second placement slot. Or the roller 41 is provided on the bottom surface of the handle. It can also be that the roller 41 is provided on the switch housing and the rail surface 42 is provided on the handle.
[0038] The first state of the switch ( Figure 4 ): Both the moving and static contact piece groups are disconnected. At this time, the contact bridges of the moving contact pieces on both sides are respectively inserted into the corresponding concave positions, and the second torsion leg still abuts against the limiting surface.
[0039] The second state of the switch: The moving and static contact piece group one is in contact.
[0040] Operation method one: Rotate the handle in the first state clockwise, from the first protrusion to the contact bridge of the moving contact piece in the moving and static contact piece group one to make the moving and static contact pieces in contact. The handle drives the torsion spring thereon to rotate together. The second torsion leg of the torsion spring will slide away from the limiting surface side in the moving slot. At this time, the torsion spring does not function. It is necessary to manually rotate the handle counterclockwise. Then, the contact bridge of the moving contact piece will be inserted into the concave position inward to disconnect from the static contact piece;
[0041] Operation method two: Rotate the handle in the first state counterclockwise, from the second protrusion to the contact bridge of the moving contact piece in the moving and static contact piece group one to make the moving and static contact pieces in contact. The handle drives the torsion spring thereon to rotate together. During the rotation process, the second torsion leg of the torsion spring will press against the limiting surface and continue to be pressed by the limiting surface, so that the torsion spring has an elastic force to drive the handle to rotate back to the reset position. At this time, after releasing the handle: Since the torsion spring will spring back and can drive the handle to automatically rotate clockwise, the contact bridge of the moving contact piece will be inserted into the concave position inward to disconnect from the static contact piece.
[0042] The third state of the switch: The protrusion makes the moving and static contact piece group two in contact.
[0043] The fourth state of the switch: Both the moving and static contact piece groups are in contact. The first protrusion makes the moving and static contact piece group one in contact, and the second protrusion makes the moving and static contact piece group two in contact.
[0044] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back...) are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.
[0045] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0046] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
Claims
1. A rotary switch, comprising a switch housing (1), a handle (2) and a set of fixed and movable contact pieces I (3). The handle (2) is rotatably connected to the switch housing (1) and is provided with a clamping structure. The fixed contact piece (31) is fixed inside the switch housing (1) and has a fixed contact point (311). One end of the movable contact piece (32) is connected to the switch housing (1), and the other end has a movable contact point (321). It is characterized in that: The moving contact piece (32) is arranged inside the corresponding static contact piece (31), and can be pushed outwards by the handle (2) to make contact with the static contact piece (31). The moving contact piece (32) can elastically reset inwards to disconnect from the static contact piece (31). The positioning structure includes a roller (41) arranged on the handle (2) and a rail surface (42) on the switch housing (1). The rail surface (42) also has a plurality of positioning slots (421) on the circumference that can allow the roller (41) to be inserted. The roller (41) is pressed into the positioning slot (421) by the first spring (43).
2. The rotary switch according to claim 1, wherein: The handle (2) has a protrusion (21) and a concave position (22) on the circumferential surface inside the switch housing (1). The moving contact piece (32) also has a contact bridge (322) for inserting into the concave position (22) or abutting against the surface of the protrusion (21). The contact bridge (322) is bent inwards from the middle of the moving contact piece (32) towards the handle (2).
3. A rotary switch according to claim 2, characterized in that: A second spring (5) is also provided to drive the moving contact piece (32) inwards to disconnect from the static contact piece (31). The second spring (5) is arranged between the outer side of the contact bridge (322) and the switch housing (1).
4. The rotary switch according to claim 3, characterized in that: On the inner wall of the switch housing (1), there is a placement groove one (11) that can accommodate the second spring (5). The placement groove one (11) has a longitudinal rib plate (111). The rib plate (111) is inserted between adjacent coils of the second spring (5) to connect and position the spring.
5. A rotary switch according to any one of claims 1-4, characterized in that: Each positioning slot (421) is in a "V" shape, and adjacent positioning slots (421) are also transitioned by an arc surface (422).
6. A rotary switch according to any one of claims 1-4, characterized in that: The center of the switch housing (1) has a receiving groove (12) for the handle (2) to insert. The rail surface (42) is arranged on the circumferential groove wall of the receiving groove (12). The outer circumference of the handle (2) has a placement groove two (23). The roller (41) is radially slidably arranged in the placement groove two (23).
7. A rotary switch according to any one of claims 2-4, characterized in that: The circumferential surface of the handle (2) has a first protrusion (21a) and a second protrusion (21b) separated by the concave position (22). A torsion spring (6) is also sleeved on the handle (2). The first torsion leg (61) of the torsion spring (6) is clamped on the handle (2), and the second torsion leg (62) is inserted into the movable groove (13) of the switch housing (1). One side of the movable groove (13) has a limiting surface (131) that abuts against the second torsion leg (62). When the handle (2) is rotated forward to be turned on, the first protrusion (21a) turns towards the contact bridge (322) to make the moving and static contact pieces in contact. The second torsion leg (62) of the torsion spring (6) will slide towards the side away from the limiting surface (131) in the movable groove (13). When the handle (2) is rotated backward to be turned on, the second protrusion (21b) turns towards the contact bridge (322) to make the moving and static contact pieces in contact. The second torsion leg (62) of the torsion spring (6) will press against the limiting surface (131) to have an elastic force to drive the handle (2) to rotate back to the reset position.
8. The rotary switch according to claim 7, wherein: The handle (2) and the switch housing (1) are fitted with each other through a convex block (71) and a limit groove (72). The convex block (71) rotates in the limit groove (72), and the two end groove walls (721) of the limit groove (72) abut against the convex block (71) to limit the further rotation of the handle (2).
9. A rotary switch according to claim 8, characterized in that: The switch housing (1) has a detachable upper cover (1a) and a lower housing (1b). The static contact piece (31) and the moving contact piece (32) are installed on the lower housing (1b), and the rail surface (42) is also provided on the lower housing (1b). The movable groove (13) and the limit groove (72) are provided on the inner top wall of the upper cover (1a).
10. A rotary switch according to claim 7, characterized in that: It further includes a second static and moving contact piece group (8). The second static and moving contact piece group (8) and the first static and moving contact piece group (3) are symmetrically arranged on both sides of the handle (2).