Multi-position knob contact switch

Abstract

The present invention discloses a multi-speed knob contact switch, comprising: a housing, a gear bracket sleeved within the housing, a moving contact module installed within the gear bracket, and a gear block for driving the moving contact module to realize different gear functions. The gear block is rotatably sleeved between the gear bracket and the housing. The moving contact module comprises a PCB board, a plurality of moving contacts, a slider assembly connected one-to-one with the moving contacts, and a gear spring connected one-to-one with the slider assembly. When the gear block rotates, it drives the slider assembly through the gear spring to drive the corresponding moving contact to slide on the PCB board. The multi-speed knob contact switch of the present invention can meet the requirements of low-current control, has stable functions, does not have the risk of wiper function failure, has a low failure rate, is of high quality, has more stable signal acquisition, and has a longer service life.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary knob switches, in particular to a multi-position rotary knob contact switch. Background Art

[0002] With the increasing demand for automobiles, the demand for wiper switches has also increased. Wipers are installed on the front windshield of a car to remove raindrops and dust adhering to the windshield, improving the driver's visibility and increasing driving safety. The operation of the wiper is controlled by its switch, so the performance of the wiper switch directly determines the effectiveness of the wiper.

[0003] The contact conduction microswitch structure used in traditional wiper switches consumes large current when realizing wiper gap, wiper low speed, and wiper high speed functions. However, for wiper switches that require small current control, there are identification risks during operation, and the wiper function is prone to failure. Therefore, it is necessary to develop a wiper switch structure that can meet small current control and has stable functions. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a multi-position knob contact switch that can meet the needs of small current control and has stable functions, high quality and low failure rate.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a multi-gear knob contact switch, comprising: a housing, a gear bracket sleeved in the housing, a movable contact module installed in the gear bracket, and a gear block for driving the movable contact module to realize different gear functions, the gear block is rotatably sleeved between the gear bracket and the housing, the movable contact module comprises a PCB board, a plurality of movable contact pieces, a slider assembly connected to the movable contact pieces in a one-to-one correspondence, and a gear spring piece connected to the slider assembly in a one-to-one correspondence, when the gear block rotates, the slider assembly is driven by the gear spring piece to drive the corresponding movable contact piece to slide on the PCB board.

[0006] As a further improvement of the present invention, the slider assembly includes a first slider installed in the gear bracket and capable of sliding up and down in a vertical direction, and a second slider capable of sliding left and right in a horizontal direction. The bottom of the first slider abuts against one end of the second slider, and the bottom of the first slider and the end of the second slider are both provided with mutually fitting inclined sliding portions, and an elastic component is installed between the other end of the second slider and the gear bracket.

[0007] As a further improvement of the present invention, the movable contact piece is installed on the bottom of the second slider, and the movable contact piece is provided with an elastic contact foot, and the elastic contact foot abuts against the PCB board.

[0008] As a further improvement of the present invention, one end of the gear spring is hinged to the gear bracket, and the other end abuts against the top of the first sliding block.

[0009] As a further improvement of the present invention, two opposite connecting lugs are provided at the end of the gear spring piece, a pin is provided in the gear bracket, and the connecting lugs are hinged on the pin.

[0010] As a further improvement of the present invention, a guide groove is provided in the gear bracket, and the first sliding block is slidably installed in the guide groove.

[0011] As a further improvement of the present invention, a receiving groove is provided at the other end of the second slider away from the inclined sliding portion, and the gear bracket is provided with a limit pin opposite to the receiving groove. The elastic component is a spring, one end of the elastic component is mounted on the limit pin, and the other end is against the receiving groove. The elastic component always has an elastic force on the second slider toward the first slider.

[0012] As a further improvement of the present invention, the shift spring piece is provided with an extrusion portion, which is formed by an upward arching of the middle portion of the shift spring piece, and the extrusion portion abuts against the inner wall of the shift block.

[0013] As a further improvement of the present invention, the inner wall of the shift block is provided with arc-shaped shift grooves corresponding to the extrusion parts along the circumferential direction, and several of the arc-shaped shift grooves are arranged in layers along one end of the shift block in the reverse rotation direction. When the shift block rotates, the extrusion parts slide out of the corresponding arc-shaped shift grooves in sequence.

[0014] As a further improvement of the present invention, a plurality of contact terminals are provided on the PCB board, and the movable contact piece slides on the PCB board to connect the corresponding contact terminals to realize different gear functions.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a multi-speed knob contact switch, which is equipped with a rotatable speed block in a shell, and three staggered and layered arc-shaped speed slots are arranged along the inner wall of the speed block. By rotating the speed block, the speed springs slide out of the corresponding arc-shaped speed slots in turn and are squeezed downward, and then drive the first slider and the second slider to make the moving contact piece slide on the PCB board to connect with the corresponding contact terminal, thereby realizing different speed functions, meeting the needs of small current control, and having stable functions, without the risk of wiper function failure, low failure rate and high quality; the elastic contact foot of the moving contact piece flexibly contacts with the PCB board, the contact is more reliable, the signal acquisition is more stable, and the service life of the switch is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention;

[0017] Figure 2 is a cross-sectional view of the present invention;

[0018] Figure 3 This is a three-dimensional diagram of the present invention after removing the housing and the shift block;

[0019] Figure 4 A three-dimensional diagram of the shift block of the present invention;

[0020] Figure 5 This is a three-dimensional diagram of the movable contact module and PCB board of the present invention;

[0021] Figure 6 It is a three-dimensional diagram of the PCB board and the movable contact piece of the present invention.

[0022] The following description is made with reference to the accompanying drawings:

[0023] 1——housing; 2——gear bracket;

[0024] 201——pin; 202——guide groove;

[0025] 203——Limiting pin; 3——Moving contact module;

[0026] 4——gear block; 401——arc-shaped gear slot;

[0027] 5——PCB board; 501——contact terminal;

[0028] 6——moving contact piece; 601——elastic contact foot;

[0029] 7 - Slider assembly; 701 - First slider;

[0030] 702 - second slider; 8 - gear spring;

[0031] 801——connecting lug; 802——extrusion part;

[0032] 9-Elastic component. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] See Figures 1 to 6The present invention provides a multi-position rotary contact switch, comprising: a housing 1, a gear bracket 2 mounted within the housing 1, a movable contact module 3 mounted within the gear bracket 2, and a gear block 4 for driving the movable contact module 3 to implement different gear functions. The gear block 4 is rotatably mounted between the gear bracket 2 and the housing 1, and a handle rotating block is mounted on the gear block 4 for adjusting gear shifting. The movable contact module 3 comprises a PCB board 5, three arranged movable contact pieces 6, three slider assemblies 7 connected one-to-one with the movable contact pieces 6, and three gear springs 8 connected one-to-one with the three slider assemblies 7. When the gear block 4 rotates, the slider assemblies 7 are driven in turn by the gear springs 8 to drive the corresponding movable contact pieces 6 to slide on the PCB board 5. The PCB board 5 is provided with a plurality of contact terminals 501. The movable contact pieces 6 slide on the PCB board 5 to connect with the corresponding contact terminals 501 to implement different gear functions.

[0035] See Figure 2 、 Figure 3 and Figure 5 The slider assembly 7 includes a first slider 701 installed in the gear bracket 2 and capable of sliding up and down in the vertical direction, and a second slider 702 capable of sliding left and right in the horizontal direction. A guide groove 202 is provided in the gear bracket 2, and the first slider 701 is slidably installed in the guide groove 202. The guide groove 202 can ensure the stability of the first slider 701 sliding up and down. A number of ribs are provided on the inner wall of the guide groove 202 to reduce the friction force when the first slider 701 slides. The bottom of the first slider 701 abuts against one end of the second slider 702, and the bottom of the first slider 701 and the end of the second slider 702 are both provided with mutually fitting inclined sliding parts. The setting of the inclined sliding part can convert the vertical downward movement of the first slider 701 into pushing the second slider 702 to move horizontally to the left. An elastic component 9 is installed between the other end of the second slider 702 and the gear bracket 2. A receiving groove is provided at the other end of the second slider 702 away from the oblique sliding portion. The gear bracket 2 is provided with a limit pin 203 opposite to the receiving groove. The elastic component 9 is a spring. One end of the elastic component 9 is mounted on the limit pin 203, and the other end rests in the receiving groove. The elastic component 9 always has an elastic force on the second slider 702 toward the first slider 701. The elastic component 9 is used to reset the second slider 702.

[0036] See Figure 2 and Figure 3 One end of the shift spring 8 is hinged to the shift bracket 2, and the other end abuts the top of the first slider 701. The end of the shift spring 8 is provided with two opposing connecting lugs 801. The pin 201 is provided in the shift bracket 2, and the connecting lugs 801 are hinged to the pin 201. When the shift spring 8 rotates clockwise around the pin 201, its end presses the first slider 701 downward. The shift spring 8 is provided with a pressing portion 802. The pressing portion 802 is formed by the upward arch of the middle portion of the shift spring 8, and the pressing portion 802 abuts the inner wall of the shift block 4.

[0037] See Figure 4 The inner wall of the shift block 4 is provided with three arc-shaped shift grooves 401 corresponding to the extrusion parts 802 in a circumferential direction. The three arc-shaped shift grooves 401 are arranged in layers along one end of the shift block 4 in the counter-rotation direction. The arc-shaped shift groove 401 close to the handle rotating block has the longest arc length, and the arc lengths of the other two arc-shaped shift grooves 401 decrease successively. When the shift block 4 rotates, the extrusion parts 802 slide out of the corresponding arc-shaped shift grooves 401 in sequence. After the extrusion parts 802 slide out of the arc-shaped shift grooves 401, they are squeezed downward by the inner wall of the shift block 4.

[0038] See Figure 5 and Figure 6 The movable contact 6 is mounted at the bottom of the second slider 702 and has a resilient contact pin 601 that rests against the PCB 5. As the second slider 702 slides left and right, the resilient contact pin 601 connects to different contact terminals 501, achieving different gear functions. The movable contact 6 is made of beryllium copper, and its resilient contact pin 601 provides flexible contact with the PCB 5, ensuring more reliable contact, more stable signal acquisition, and a longer switch life.

[0039] To further illustrate this embodiment, the multi-position knob contact switch structure of this embodiment is used as a wiper switch on a car, which can adjust the three gear functions of the wiper:

[0040] Intermittent wiper position: Figure 2 As shown in the figure, the handle block is rotated counterclockwise to rotate the gear block 4 one gear in the housing 1. The extrusion portion 802 close to the handle block slides out of the corresponding arc-shaped gear slot 401 and is squeezed downward by the inner wall of the gear block 4. At this time, the other two extrusion portions 802 are still located in their corresponding arc-shaped gear slots 401. The end of the gear spring 8 presses the first slider 701 downward, and the first slider 701 pushes the second slider 702 to move horizontally to the left and compresses the elastic component 9. The second slider 702 drives the movable contact piece 6 to move, and its elastic contact foot 601 connects two of the contact terminals 501, realizing the intermittent wiper function.

[0041] Wiper low-speed gear: Continue to rotate the handle block counterclockwise to make the gear block 4 rotate one gear again in the housing 1. The squeezing portion 802 of the gear spring 8 in the middle slides out of the corresponding arc-shaped gear slot 401 and is squeezed downward by the inner wall of the gear block 4. The principle is the same as above, so that the elastic contact foot 601 of the movable contact piece 6 in the middle connects to the other two contact terminals 501, realizing the low-speed wiper function;

[0042] Wiper high-speed gear: rotate the handle block counterclockwise to make the gear block 4 rotate one gear again in the shell 1. The extrusion part 802 of the last gear spring piece 8 slides out of the corresponding arc-shaped gear groove 401 and is squeezed downward by the inner wall of the gear block 4. The principle is the same as above, so that the elastic contact foot 601 of the last moving contact piece 6 is connected to two more contact terminals 501 to realize the high-speed wiper function.

[0043] It can be seen that the present invention is a multi-speed knob contact switch, which is equipped with a rotatable speed block in a shell, and three arc-shaped speed slots arranged in a staggered layer along the inner wall of the speed block. By rotating the speed block, the speed springs slide out of the corresponding arc-shaped speed slots in turn and are squeezed downward, and then drive the first slider and the second slider to make the moving contact piece slide on the PCB board to connect with the corresponding contact terminals, thereby realizing different speed functions, meeting the needs of small current control, and having stable functions, without the risk of wiper function failure, low failure rate and high quality; the elastic contact foot of the moving contact piece is in flexible contact with the PCB board, the contact is more reliable, the signal acquisition is more stable, and the service life of the switch is longer.

[0044] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A multi-position knob contact switch, characterized in that: include: A housing (1), a gear bracket (2) sleeved in the housing (1), a moving contact module (3) installed in the gear bracket (2), and a gear block (4) for driving the moving contact module (3) to realize different gear functions, wherein the gear block (4) is rotatably sleeved between the gear bracket (2) and the housing (1), and the moving contact module (3) comprises a PCB board (5), a plurality of moving contact pieces (6), a slider assembly (7) connected one-to-one with the moving contact pieces (6), and a gear spring piece (8) connected one-to-one with the slider assembly (7). When the gear block (4) rotates, the slider assembly (7) is driven by the gear spring piece (8) to drive the corresponding moving contact piece (6) to slide on the PCB board (5); the slider assembly (7) comprises a plurality of moving contact pieces (6) installed in the gear bracket (2). A first slider (701) is provided inside the gear bracket (2) and can slide up and down in the vertical direction, and a second slider (702) can slide left and right in the horizontal direction, the bottom of the first slider (701) is against one end of the second slider (702), and the bottom of the first slider (701) and the end of the second slider (702) are both provided with mutually fitting inclined sliding parts, and an elastic component (9) is installed between the other end of the second slider (702) and the gear bracket (2); the movable contact piece (6) is installed at the bottom of the second slider (702), and the movable contact piece (6) is provided with an elastic contact foot (601), and the elastic contact foot (601) is against the PCB board (5); one end of the gear spring piece (8) is hinged on the gear bracket (2), and the other end is against the top of the first slider (701).

2. The multi-position knob contact switch according to claim 1, characterized in that: Two opposite connecting lugs (801) are provided at the end of the gear spring piece (8), a pin shaft (201) is provided in the gear bracket (2), and the connecting lugs (801) are hinged on the pin shaft (201).

3. The multi-position knob contact switch according to claim 1, characterized in that: A guide groove (202) is provided in the gear bracket (2), and the first sliding block (701) is slidably mounted in the guide groove (202).

4. The multi-position knob contact switch according to claim 1, characterized in that: The other end of the second slider (702) away from the inclined sliding portion is provided with a receiving groove, the gear bracket (2) is provided with a limit pin (203) directly opposite to the receiving groove, the elastic component (9) is a spring, one end of the elastic component (9) is sleeved on the limit pin (203), and the other end is against the receiving groove, and the elastic component (9) always has an elastic force on the second slider (702) toward the first slider (701).

5. The multi-position knob contact switch according to claim 1, characterized in that: The shift spring piece (8) is provided with an extrusion portion (802), the extrusion portion (802) being formed by the middle portion of the shift spring piece (8) being arched upwards, and the extrusion portion (802) being pressed against the inner wall of the shift block (4).

6. The multi-position knob contact switch according to claim 5, characterized in that: The inner wall of the shift block (4) is provided with arcuate shift grooves (401) corresponding to the extrusion parts (802) along the circumferential direction, and a plurality of the arcuate shift grooves (401) are arranged in layers along one end of the shift block (4) in the reverse rotation direction. When the shift block (4) rotates, the extrusion parts (802) slide out of the corresponding arcuate shift grooves (401) in sequence.

7. The multi-position knob contact switch according to claim 1, characterized in that: A plurality of contact terminals (501) are provided on the PCB board (5), and the movable contact piece (6) slides on the PCB board (5) to connect to the corresponding contact terminals (501) to realize different gear functions.

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