Multi-gear air-tight travel switch

Abstract

The utility model relates to a multi-gear air-tight seal travel switch which comprises an inner shell seat and a supporting cylinder, one end of the supporting cylinder is fixedly connected with a cover disc, the other end of the supporting cylinder extends into one end of the inner shell seat, the other end of the inner shell seat is fixedly connected with a base, a spring is further arranged in the supporting cylinder, one end of the spring abuts against the surface of the cover disc, and the other end of the spring abuts against the surface of the cover disc. The other end of the spring abuts against the surface of the base, a plurality of movable contact pieces and a plurality of insulation contact pieces are attached to the surface of the supporting cylinder, a plurality of normally-closed contact pieces and a plurality of normally-open contact pieces are further arranged in the inner shell base, at least one end of each normally-closed contact piece abuts against the surface of the corresponding movable contact piece, at least one end of each normally-open contact piece abuts against the surface of the corresponding insulation contact piece, and the other end of each normally-open contact piece abuts against the surface of the corresponding insulation contact piece. The whole moving contact is Z-shaped. By adopting the technical scheme provided by the utility model, the integration level is improved, the redundant number of the conductive contact pieces is increased, the reliability is ensured, the corrugated pipe is adopted as an elastic element, the corrugated pipe can keep good elasticity at low temperature, and the use reliability of the travel switch in a low-temperature environment is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of travel switches, and in particular relates to a multi-position air-sealed travel switch. Background Art

[0002] A travel switch is a fast-changing switch actuated by pressure. Because the contact spacing of the switch is relatively small, common travel switches generally include a trigger device and an electrical switching device. The trigger device is used to transmit external force to the electrical switching device, and the electrical switching device is used to achieve switching of the electrical connection state.

[0003] For example, the patent document with the publication number "CN106128807B" discloses a travel switch trigger device and a travel switch module using the device, wherein the travel switch trigger device includes a bracket swingably equipped with a force transmission member, the force transmission member has an avoidance groove, and the avoidance groove is close to the two groove walls close to the notch to form a first contour surface for pressing the trigger button of the travel switch and a second contour surface symmetrical about the first symmetry plane, the rotation axis of the force transmission member is on the first symmetry plane, the force transmission member also has a first contact portion in contact with the trigger member and a second contact portion symmetrical about the second symmetry plane; the force transmission member has a free position, a first direction trigger position and a second direction trigger position opposite to the first direction trigger position, and the travel switch device also includes a reset mechanism for resetting the force transmission member from the first and second direction trigger positions to the free position. This patented technology realizes the two-way same-position triggering of the travel switch.

[0004] However, the existing travel switch can generally only realize the circuit state in two gear states. If the number of gear states needs to be increased, the number of corresponding conductive contacts will be increased. Since the contact spacing of the travel switch is small, the structural complexity of the travel switch is inevitably increased, and the manufacturing difficulty of each component in the travel switch is increased, which reduces the reliability of the travel switch. In addition, the touch device of the existing travel switch is generally made of a spring, and the touch element is generally exposed outside the outer shell of the travel switch. On the one hand, since the touch element is directly exposed to the external environment, it is very easy to be damaged by oxidation or damaged by the attack of chemical substances in the external environment. On the other hand, when the spring operates under low temperature conditions, its elastic performance decays greatly, which also affects the reliability of the travel switch. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a multi-position airtight seal travel switch.

[0006] The utility model provides a multi-speed air-tight travel switch, comprising an inner shell seat and a supporting cylinder, one end of the supporting cylinder is fixedly connected to a cover plate, the other end of the supporting cylinder extends into one end of the inner shell seat, the other end of the inner shell seat is fixedly connected to a base, a spring is further provided in the supporting cylinder, one end of the spring abuts against the surface of the cover plate, the other end of the spring abuts against the surface of the base, a plurality of moving contact pieces and a plurality of insulating contact pieces are mounted on the surface of the supporting cylinder, a plurality of normally closed contact pieces and a plurality of normally open contact pieces are further provided in the inner shell seat, at least one end of the normally closed contact piece abuts against the surface of the moving contact piece, at least one end of the normally open contact piece abuts against the surface of the insulating contact piece, and the moving contact piece is in a Z shape as a whole.

[0007] An intermediate contact piece is mounted on the surface of the support cylinder, and a plurality of common contacts are arranged in the inner shell seat. At least one end of the common contact piece abuts against the surface of the intermediate contact piece.

[0008] The intermediate contact piece is in the shape of a circular ring as a whole.

[0009] At least one end of the support tube extends into the cap, at least one end of the cap extends into one end of the inner shell cover, the other end of the inner shell cover covers the surface of the inner shell seat, and the support tube passes through the inner shell cover, and a bellows is also provided in the inner shell cover, one end of the bellows abuts against the surface of the cap, and the other end of the bellows abuts against the surface of the inner shell seat.

[0010] The inner shell cover is also fixedly connected to the outer shell, the outer shell is also fixedly connected to the bottom plate, and the inner shell seat and the base are both accommodated in the outer shell, and gel is filled between the outer shell and the inner shell seat, the base and the bottom plate.

[0011] The normally closed contact or the normally open contact is riveted to one end of the support piece respectively, and the other end of the support piece is fixedly connected to the annular tray. All the annular trays are stacked together in series through insulating pillars, and the insulating pillars are also fixedly connected to the base.

[0012] The insulating support column is also fixedly connected with the positioning plate, and the positioning plate is sleeved in the base.

[0013] A guide sleeve is also provided in the inner shell seat, a rotation-stopping groove is provided on the surface of the guide sleeve, and a rotation-stopping platform is also provided on the surface of the supporting cylinder, and the rotation-stopping platform is sleeved in the rotation-stopping groove.

[0014] The inner shell seat or the inner shell cover is also filled with inert gas.

[0015] The number of the normally closed contacts, normally open contacts or common contacts is more than 2 pairs.

[0016] The beneficial effects of the utility model are as follows: by adopting the technical solution provided by the utility model, the number of conductive contacts is increased, the switching gears of the travel switch state are increased, the function of the travel switch is expanded, and the conductive contacts are arranged in a circular array on the outer peripheral surface of the supporting cylinder, and the moving contact is set in a Z shape as a whole, which improves the integration and is beneficial to reducing the overall external volume of the travel switch, and for each predefined functional type of normally closed contacts and normally open contacts, multiple pairs are set, the number of redundant contacts is increased, and the reliability of the travel switch is ensured. In addition, the travel switch provided by the utility model wraps the spring and the bellows in the shell to prevent the elastic element from being oxidized and failing, thereby extending the service life of the travel switch, and the bellows can still maintain good elasticity under low temperature conditions, thereby ensuring the reliability of the travel switch when used in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection structure of the support cylinder and the moving contact piece, the insulating contact piece, the common contact piece and the cover plate of the utility model;

[0019] Figure 3 It is a front view of the connection structure of the base, the static contact piece, the supporting piece, the annular tray, the insulating support and the positioning plate of the utility model;

[0020] Figure 4 It is a top view of the connection structure of the base, the static contact piece, the supporting piece, the annular tray, the insulating support and the positioning plate of the utility model.

[0021] In the figure: 1-inner shell seat, 2-support cylinder, 3-cover plate, 4-base, 5-spring, 6-moving contact, 7-insulating contact, 8-intermediate contact, 9-normally closed contact, 10-cap, 11-inner shell cover, 12-bellows, 13-outer shell, 14-bottom plate, 15-gel, 16-buffer pad, 17-support plate, 18-ring tray, 19-insulating support, 20-wire, 21-positioning plate, 22-guide sleeve, 23 normally open contact, 24-common contact. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings, but the protection scope required is not limited to the above;

[0023] The utility model provides a multi-position air-sealed travel switch, such as Figures 1 to 4As shown, it includes an inner shell seat 1 and a supporting cylinder 2, one end of the supporting cylinder 2 is fixedly connected to the cover plate 3, the other end of the supporting cylinder 2 extends into one end of the inner shell seat 1, and the other end of the inner shell seat 1 is fixedly connected to the base 4. A spring 5 is also provided in the supporting cylinder 2, one end of the spring 5 abuts against the surface of the cover plate 3, and the other end of the spring 5 abuts against the surface of the base 4. A plurality of moving contact pieces 6 and a plurality of insulating contact pieces 7 are mounted on the surface of the supporting cylinder 2. A plurality of normally closed contact pieces 9 and a plurality of normally open contact pieces 23 are also provided in the inner shell seat 1, at least one end of the normally closed contact piece 9 abuts against the surface of the moving contact piece 6, and at least one end of the normally open contact piece 23 abuts against the surface of the insulating contact piece 7, and the moving contact piece 6 is Z-shaped as a whole. When the support cylinder 2 is forced to move along its axial direction, at least one end of all the normally closed contacts 9 and the normally open contacts 23 slides along the axial direction of the support cylinder 2 at the same time. Since the movable contact 6 is in a Z shape as a whole, the end of the normally closed contact 9 abuts against the surface of the insulating contact 7, and the end of the normally open contact 23 abuts against the surface of the movable contact 6, thereby converting the normally closed end of the travel switch into the normally open end, and the normally open end into the normally closed end.

[0024] By adopting the technical solution provided by the utility model, the number of conductive contacts is increased, the switching gears of the travel switch state are increased, the function of the travel switch is expanded, the conductive contacts are arranged in a circular array on the outer circumferential surface of the supporting cylinder, and the moving contact is set in a Z shape as a whole, which improves the integration and is conducive to reducing the overall external volume of the travel switch. For each predefined functional type of normally closed contacts and normally open contacts, multiple pairs are set, the number of redundant contacts is increased, and the reliability of the travel switch is ensured. In addition, the travel switch provided by the utility model wraps the spring and the bellows in the shell to prevent the elastic element from oxidizing and failing, thereby extending the service life of the travel switch. The bellows can still maintain good elasticity under low temperature conditions, ensuring the reliability of the travel switch when used in a low temperature environment.

[0025] Specifically, an intermediate contact 8 is mounted on the surface of the support cylinder 2, and a plurality of common contacts 24 are also provided in the inner shell seat 1, and at least one end of the common contact 24 abuts against the surface of the intermediate contact 8. The intermediate contact 8 is in the shape of a circular ring as a whole. The corresponding sliding rules of the normally closed contact 9, the normally open contact 23 and the common contact 24 are: the normally closed contact 9 switches between the moving contact 6 and the insulating contact 7; the normally open contact 23 switches between the insulating contact 7 and the moving contact 6; the common contact 24 always slides on the surface of the intermediate contact 8. Preferably, the moving contact 6 is in the shape of a letter Z as a whole. Thus, the conductive contacts are arranged in a circular array on the outer peripheral surface of the support cylinder, and the moving contact is set in the shape of a letter Z as a whole, which improves the integration and helps to reduce the overall external volume of the travel switch.

[0026] In addition, at least one end of the support tube 2 extends into the cap 10, at least one end of the cap 10 extends into one end of the inner shell cover 11, the other end of the inner shell cover 11 covers the surface of the inner shell seat 1, and the support tube 2 passes through the inner shell cover 11. A bellows 12 is also provided in the inner shell cover 11, one end of the bellows 12 abuts against the surface of the cap 10, and the other end of the bellows 12 abuts against the surface of the inner shell seat 1. Since the bellows can still maintain good elasticity under low temperature conditions, the reliability of the travel switch in low temperature environments is guaranteed.

[0027] In addition, the inner shell 11 is also fixedly connected to the outer shell 13, and the outer shell 13 is also fixedly connected to the bottom plate 14. The inner shell seat 1 and the base 4 are both accommodated in the outer shell 13, and the outer shell 13 and the inner shell seat 1, the base 4, and the bottom plate 14 are filled with gel 15. Preferably, a cushion 16 is attached to the surface of the outer shell 13.

[0028] Specifically, the normally closed contact piece 9 or the normally open contact piece 23 is riveted to one end of the support piece 17, and the other end of the support piece 17 is fixedly connected to the annular tray 18. All the annular trays 18 are stacked in series through the insulating pillar 19, and the insulating pillar 19 is also fixedly connected to the base 4. The support piece 17 is also fixedly connected to one end of the wire 20, and the other end of the wire 20 extends out of the outer shell 13. The insulating pillar 19 is also fixedly connected to the positioning plate 21, and the positioning plate 21 is sleeved in the base 4. Thereby, the integration of the travel switch is improved, which is conducive to reducing the overall appearance volume of the travel switch.

[0029] In addition, a guide sleeve 22 is provided in the inner shell seat 1, and a rotation-stopping groove is provided on the surface of the guide sleeve 22. A rotation-stopping platform is provided on the surface of the support cylinder 2, and the rotation-stopping platform is sleeved in the rotation-stopping groove. The inner shell seat 1 or the inner shell cover 11 is also filled with an inert gas. The number of the normally closed contacts 9, the normally open contacts 23 or the common contacts 24 is more than 2 pairs. The normally closed contacts 9, the normally open contacts 23 or the common contacts 24 are uniformly arranged in an array along the four sides of the support cylinder 2.

Claims

1. A multi-position airtight travel switch, characterized in that: The invention comprises an inner shell seat (1) and a support tube (2), one end of the support tube (2) is fixedly connected to a cover plate (3), the other end of the support tube (2) extends into one end of the inner shell seat (1), the other end of the inner shell seat (1) is fixedly connected to a base (4), a spring (5) is further arranged in the support tube (2), one end of the spring (5) abuts against the surface of the cover plate (3), the other end of the spring (5) abuts against the surface of the base (4), and a plurality of moving contact pieces (6) and a plurality of insulating contact pieces (7) are mounted on the surface of the support tube (2) The inner shell seat (1) is further provided with a plurality of normally closed contacts (9) and a plurality of normally open contacts (23); at least one end of the normally closed contact (9) abuts against the surface of the movable contact (6); at least one end of the normally open contact (23) abuts against the surface of the insulating contact (7); the movable contact (6) is in a Z-shape as a whole; an intermediate contact (8) is mounted on the surface of the support cylinder (2); and a plurality of common contacts (24) are further provided in the inner shell seat (1); at least one end of the common contact (24) abuts against the surface of the intermediate contact (8).

2. A multi-position airtight travel switch according to claim 1, characterized in that: The intermediate contact piece (8) is in the shape of a circular ring as a whole.

3. A multi-position airtight travel switch according to claim 1, characterized in that: At least one end of the support tube (2) extends into the cap (10), and at least one end of the cap (10) extends into one end of the inner shell cover (11). The other end of the inner shell cover (11) covers the surface of the inner shell seat (1), and the support tube (2) passes through the inner shell cover (11). A bellows (12) is also provided in the inner shell cover (11), and one end of the bellows (12) abuts against the surface of the cap (10), and the other end of the bellows (12) abuts against the surface of the inner shell seat (1).

4. A multi-position airtight travel switch as claimed in claim 3, characterized in that: The inner shell cover (11) is also fixedly connected to the outer shell (13), and the outer shell (13) is also fixedly connected to the bottom plate (14). The inner shell seat (1) and the base (4) are both accommodated in the outer shell (13), and the space between the outer shell (13) and the inner shell seat (1), the base (4), and the bottom plate (14) is filled with gel (15).

5. A multi-position airtight travel switch according to claim 1, characterized in that: The normally closed contact (9) or the normally open contact (23) is riveted to one end of the support (17), and the other end of the support (17) is fixedly connected to the annular tray (18). All the annular trays (18) are stacked together in series through insulating pillars (19), and the insulating pillars (19) are also fixedly connected to the base (4).

6. A multi-position airtight travel switch as claimed in claim 5, characterized in that: The insulating support (19) is also fixedly connected to a positioning plate (21), and the positioning plate (21) is sleeved in the base (4).

7. A multi-position airtight travel switch according to claim 1 or 3, characterized in that: A guide sleeve (22) is also provided inside the inner shell seat (1), a rotation-stopping groove is provided on the surface of the guide sleeve (22), and a rotation-stopping platform is also provided on the surface of the support cylinder (2), and the rotation-stopping platform is sleeved in the rotation-stopping groove.

8. A multi-position airtight travel switch as claimed in claim 3, characterized in that: The inner shell seat (1) or the inner shell cover (11) is also filled with inert gas.

9. A multi-position airtight travel switch according to claim 1, characterized in that: The number of the normally closed contacts (9), normally open contacts (23) or common contacts (24) is more than 2 pairs.

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