Stable metal knob switch

Abstract

The application discloses a stable metal rotary knob switch. The technical scheme is as follows: a base, a contact assembly arranged in the base, a metal shell arranged on the base, and a rotary knob assembly arranged in the metal shell; the rotary knob assembly comprises a rotary knob, a connecting shaft, a double-layer cam, a center ring and an outer pressing ring; the rotary knob is connected to the upper end of the double-layer cam; the bottom of the double-layer cam is provided with two symmetrical inner protruding portions and two symmetrical outer protruding portions; the two sides of the inner protruding portions are formed with inner V-shaped sliding grooves; and the two sides of the outer protruding portions are formed with outer V-shaped sliding grooves. The cam adopts a double-layer structure, in the rotating process, four directions are all in sliding and positioning cooperation with V-shaped rods, force is more uniform, and thus the stability of the rotary knob is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of switches, specifically relating to a rotary switch. Background Technology

[0002] A rotary switch is a device that controls the on / off state of a circuit by rotating it. A traditional rotary switch consists of: a base, a contact assembly within the base, a metal housing on the base, and a rotary assembly within the metal housing. The rotary assembly includes: a knob, a cam at the lower end of the knob, a push rod below the cam, and a spring that returns the push rod to its original position. When the knob is rotated, the cam's protrusion presses against the push rod, causing it to slide down and operate the contact assembly. The disadvantages are: 1. It uses a single-layer cam structure, resulting in poor structural stability; 2. It uses a single sealing ring internally, leading to poor waterproofing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a stable metal rotary switch.

[0004] To solve the above problems, the present invention adopts the following technical solution: It includes a base, a contact assembly disposed within the base, a metal housing disposed on the base, and a knob assembly disposed within the metal housing. The knob assembly includes a knob, a connecting shaft, a double-layer cam, a central ring, and an outer pressure ring. The knob is connected to the upper end of the double-layer cam. The bottom of the double-layer cam has two symmetrical inner protrusions and two symmetrical outer protrusions. An inner "V"-shaped groove is formed between the two sides of the inner protrusions, and an outer "V"-shaped groove is formed between the two sides of the outer protrusions. The central ring is disposed below the double-layer cam and has inner "V"-shaped rods on both sides that slide in cooperation with the inner "V"-shaped grooves. The outer pressure ring is disposed outside the central ring and has outer "V"-shaped rods on both sides that slide in cooperation with the outer "V"-shaped grooves. The lower end of the central ring has first return springs abutting against the base on both sides. The outer pressure ring has a push rod abutting against the contact assembly on one side and a second return spring abutting against the base on the other side.

[0005] The base has a bushing at its upper end, and the central ring has slide rails on both sides. The bushing has a first slide groove that slides with the slide rails.

[0006] The bushing is provided with a second sliding groove that slides in conjunction with the outer "V" shaped rod.

[0007] The connecting shaft is provided with a buckle, and the knob is provided with a slot for connecting with the buckle.

[0008] The outer pressure ring is composed of a first outer pressure ring and a second outer pressure ring, with the two sides of the first and second outer pressure rings respectively attached to the two sides of the slide rail.

[0009] The bushing is provided with a positioning sleeve, and a sealing groove is formed between the positioning sleeve and the inner wall of the bushing. The upper end of the double-layer cam is provided with a positioning groove, and the lower end of the positioning sleeve is embedded in the positioning groove.

[0010] The sealing groove is provided with a first sealing ring, the upper end of the double-layer cam is provided with a sealing flange that applies pressure to the first sealing ring, and the bottom of the connecting shaft is fitted with a second sealing ring, and the second sealing ring is sealed to the inner wall of the positioning sleeve.

[0011] The first and second sealing rings are shown in a double V-shape in the cross-section, with a large V-groove at the upper end and a small V-groove at the lower end.

[0012] The advantages of the stable metal rotary switch of the present invention are: 1. The cam adopts a double-layer structure. During rotation, it slides and positions with the "V"-shaped rod in all four directions, resulting in more uniform force distribution and thus greatly improving the stability of the knob; 2. The internal double sealing ring structure greatly improves the waterproof performance, and the waterproof performance can reach IP67 level after testing.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the stable metal rotary switch of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the stable metal rotary switch of the present invention;

[0016] Figure 3 This is a schematic diagram of the assembly between the double-layer cam, the central ring, and the outer pressure ring of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the double-layer cam, central ring, and outer pressure ring of the present invention;

[0018] Figure 5 This is a schematic diagram of the bottom structure of the double-layer cam of the present invention;

[0019] Figure 6 A schematic diagram of the structure of the bushing of this invention;

[0020] Figure 7 A schematic diagram of the sealing structure between the bushing, double-layer cam, and connecting shaft of the present invention;

[0021] Figure 8 This is a schematic diagram of the top structure of the double-layer cam of the present invention;

[0022] Figure 9 This is a cross-sectional view of the first sealing ring of the present invention.

[0023] In the diagram: 1. Base; 2. Contact assembly; 3. Metal housing; 4. Knob assembly; 5. Knob; 6. Double-layer cam; 7. Center ring; 8. Outer pressure ring; 9. Inner protrusion; 10. Outer protrusion; 11. Inner "V" shaped groove; 12. Outer "V" shaped groove; 13. Inner "V" shaped rod; 14. Outer "V" shaped rod; 15. First return spring; 16. Push rod; 17. Second return spring; 18. Bushing; 19. Slide rail; 20. First groove; 21. Second groove; 22. Connecting shaft; 23. Buckle; 24. Slot; 25. Positioning sleeve; 26. Sealing groove; 27. Positioning groove; 28. First sealing ring; 29. ​​Sealing flange; 30. Second sealing ring; 31. Large V-shaped groove; 32. Small V-shaped groove; 801. First outer pressure ring; 802. Second outer pressure ring. Detailed Implementation

[0024] like Figure 1-9 As shown, the stable metal rotary switch of the present invention includes a base 1, a contact assembly 2 disposed within the base 1, a metal housing 3 disposed on the base 1, and a rotary assembly 4 disposed within the metal housing 3. The rotary assembly 4 includes a knob 5, a connecting shaft 22, a double-layer cam 6, a central ring 7, and an outer pressure ring 8. The knob 5 is connected to the upper end of the double-layer cam 6 via the connecting shaft 22. The bottom of the double-layer cam 6 has two symmetrically arranged inner protrusions 9 and two symmetrically arranged outer protrusions 10. An inner "V"-shaped groove 11 is formed between the two sides of the inner protrusions 9, and an outer "V"-shaped groove 12 is formed between the two sides of the outer protrusions 10. The central ring 7 is disposed below the double-layer cam 6, and the two sides of the central ring 7 are provided with inner "V"-shaped rods 13 that slide in cooperation with the inner "V"-shaped grooves 11. The outer pressure ring 8 is located outside the central ring 7, and outer "V"-shaped rods 14 are provided on both sides of the outer pressure ring 8 to slide in cooperation with the outer "V"-shaped groove 12. The lower ends of the central ring 7 are provided with first return springs 15 abutting against the base 1. One side of the outer pressure ring 8 is provided with a push rod 16 abutting against the contact assembly 2, and the other side of the outer pressure ring 8 is provided with a second return spring 17 abutting against the base 1. When the knob 5 is rotated, the four "V"-shaped rods slide along the "V"-shaped groove, thereby driving the push rod 16 downwards. When the top of the "V"-shaped rod reaches the end face of the protrusion, the contact assembly 2 is closed. When the knob 5 is rotated further, causing the "V"-shaped rods to leave the end face of the protrusion, the push rod 16 slides upwards under the action of the return springs, resetting the switch.

[0025] Preferably, the base 1 has a bushing 18 at its upper end, and the central ring 7 has slide rails 19 on both sides. The bushing 18 has a first slide groove 20 that slides with the slide rails 19. The bushing 18 also has a second slide groove 21 that slides with the outer "V"-shaped rod 14. This structure makes the sliding of the central ring 7 and the outer pressure ring 8 more stable.

[0026] Preferably, the connecting shaft 22 is provided with a buckle 23, and the knob 5 is provided with a slot 24 for connecting with the buckle 23. The connecting shaft 22 is usually fixed to the double-layer cam 6 by a screw, thereby realizing the quick connection between the double-layer cam 6 and the knob 5.

[0027] Preferably, the outer pressure ring 8 is composed of a first outer pressure ring 801 and a second outer pressure ring 802, with the two sides of the first outer pressure ring 801 and the second outer pressure ring 802 respectively attached to the two sides of the slide rail 19. This structure facilitates assembly and reduces volume.

[0028] Preferably, the bushing 18 is provided with a positioning sleeve 25, and a sealing groove 26 is formed between the positioning sleeve 25 and the inner wall of the bushing 18. The upper end of the double-layer cam 6 is provided with a positioning groove 27, and the lower end of the positioning sleeve 25 is embedded in the positioning groove 27. The positioning fit between the positioning sleeve 25 and the positioning groove 27 improves the stability of the double-layer cam 6 during rotation.

[0029] Preferably, a first sealing ring 28 is provided in the sealing groove 26, a sealing flange 29 is provided at the upper end of the double-layer cam 6 to apply pressure to the first sealing ring 28, and a second sealing ring 30 is sleeved at the bottom of the connecting shaft 22, and the second sealing ring 30 is in sealing fit with the inner wall of the positioning sleeve 25. Through the above structure, a double-layer seal is achieved for the product.

[0030] Preferably, the cross-sections of the first sealing ring 28 and the second sealing ring 30 are double V-shaped, with a large V-groove 31 at the upper end and a small V-groove 32 at the lower end. The double V-groove contacts the sealing interface, thereby greatly improving the sealing performance.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A stable metal rotary switch, comprising a base (1), a contact assembly (2) disposed within the base (1), a metal housing (3) disposed on the base (1), and a rotary assembly (4) disposed within the metal housing (3), characterized in that: The knob assembly (4) includes a knob (5), a connecting shaft (22), a double-layer cam (6), a central ring (7), and an outer pressure ring (8). The knob (5) is connected to the upper end of the double-layer cam (6) via the connecting shaft (22). The bottom of the double-layer cam (6) is provided with two symmetrical inner protrusions (9) and two symmetrical outer protrusions (10). An inner "V" shaped groove (11) is formed between the two sides of the inner protrusions (9), and an outer "V" shaped groove (12) is formed between the two sides of the outer protrusions (10). The central ring (7) is located on the upper end of the double-layer cam (6). The double-layer cam (6) is provided with an inner "V" shaped rod (13) that slides with the inner "V" shaped groove (11) below and on both sides. The outer pressure ring (8) is provided outside the central ring (7) and has an outer "V" shaped rod (14) that slides with the outer "V" shaped groove (12) on both sides. The lower end of the central ring (7) is provided with a first return spring (15) that abuts against the base (1). The outer pressure ring (8) has a push rod (16) that abuts against the contact assembly (2) on one side and a second return spring (17) that abuts against the base (1) on the other side.

2. The stable metal rotary switch according to claim 1, characterized in that: The base (1) has a bushing (18) at its upper end, and the center ring (7) has slide rails (19) on both sides. The bushing (18) has a first slide groove (20) that slides with the slide rails (19).

3. The stable metal rotary switch according to claim 2, characterized in that: The bushing (18) is provided with a second groove (21) that slides in conjunction with the outer "V" shaped rod (14).

4. The stable metal rotary switch according to claim 1, characterized in that: The connecting shaft (22) is provided with a buckle (23), and the knob (5) is provided with a slot (24) that connects to the buckle (23).

5. The stable metal rotary switch according to claim 2, characterized in that: The outer pressure ring (8) is composed of a first outer pressure ring (801) and a second outer pressure ring (802), with the two sides of the first outer pressure ring (801) and the second outer pressure ring (802) respectively attached to the two sides of the slide rail (19).

6. The stable metal rotary switch according to claim 2, characterized in that: The bushing (18) is provided with a positioning sleeve (25), and a sealing groove (26) is formed between the positioning sleeve (25) and the inner wall of the bushing (18). The upper end of the double-layer cam (6) is provided with a positioning groove (27), and the lower end of the positioning sleeve (25) is embedded in the positioning groove (27).

7. The stable metal rotary switch according to claim 6, characterized in that: The sealing groove (26) is provided with a first sealing ring (28), the upper end of the double-layer cam (6) is provided with a sealing flange (29) that applies pressure to the first sealing ring (28), the bottom of the connecting shaft (22) is fitted with a second sealing ring (30), and the second sealing ring (30) is sealed to the inner wall of the positioning sleeve (25).

8. The stable metal rotary switch according to claim 7, characterized in that: The first sealing ring (28) and the second sealing ring (30) are double V-shaped in cross-section, with a large V-groove (31) at the upper end and a small V-groove (32) at the lower end.

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