Contact switch and elevator control circuit

Abstract

The present invention discloses a contact switch, comprising: a fully enclosed housing structure having a fully enclosed internal accommodating chamber; a moving contact, which is accommodated in the fully enclosed internal accommodating chamber; and a stationary contact, which is accommodated in the fully enclosed internal accommodating chamber. The fully enclosed housing structure comprises: a housing, on which an opening is formed; and an elastic seal, which is arranged on the opening of the housing and seals the opening. The moving contact is attached to the elastic seal, so that the moving contact can be moved from an open position electrically separated from the stationary contact to a closed position electrically contacted with the stationary contact by pushing the elastic seal from the outside of the housing. In the present invention, the moving contact and the stationary contact of the contact switch are accommodated in the fully enclosed housing structure, so that external dust or water vapor can be prevented from entering the electrical contacts of the contact switch, thereby effectively avoiding the generation of arcs at the moment of the contact switch being turned on and off and avoiding the contact surfaces of the electrical contacts being burned by arcs.

Description

Technical Field

[0001] The invention relates to a contact switch and an elevator control circuit comprising the contact switch. Background Art

[0002] Due to the complex on-site environment where the elevator is located, some fine particle pollutants, such as construction waste or decoration materials, sometimes enter the electrical contacts of the elevator door contact switch, causing the resistance of the electrical contacts of the contact switch to increase, which will cause an arc to be generated when the contact switch is turned on and off. The arc will burn the contact surface of the electrical contact, and then cause the elevator door safety circuit to fail. Summary of the invention

[0003] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0004] According to one aspect of the present invention, there is provided a contact switch, comprising: a fully enclosed housing structure having a fully enclosed internal accommodating chamber; a moving contact accommodated in the fully enclosed internal accommodating chamber; and a stationary contact accommodated in the fully enclosed internal accommodating chamber. The fully enclosed housing structure comprises: a housing having an opening formed thereon; and an elastic seal disposed on the opening of the housing and sealing the opening. The moving contact is attached to the elastic seal so that the moving contact can be moved from an open position electrically separated from the stationary contact to a closed position electrically contacted with the stationary contact by pushing the elastic seal from the outside of the housing.

[0005] According to an exemplary embodiment of the present invention, when the external thrust applied to the elastic seal disappears, the elastic seal automatically resets to the initial position by relying on its own elastic restoring force, and drives the moving contact to move from a closed position in electrical contact with the static contact to an open position in which it is electrically separated from the static contact.

[0006] According to another exemplary embodiment of the present invention, when the elastic sealing member is in the initial position, the elastic sealing member is in an arch shape protruding outward from the housing.

[0007] According to another exemplary embodiment of the present invention, the elastic sealing member is an elastic sealing member made of fatigue-resistant elastic rubber material.

[0008] According to another exemplary embodiment of the present invention, the completely enclosed internal accommodating chamber is filled with a gaseous or liquid insulating medium, and the moving contact and the static contact are immersed in the insulating medium.

[0009] According to another exemplary embodiment of the present invention, the insulating medium is insulating inert gas or insulating oil.

[0010] According to another exemplary embodiment of the present invention, the contact switch also includes a connecting wire, which is connected to the stationary contact; a wire hole is formed on the shell, and the connecting wire is led out to the outside of the shell through the wire hole on the shell so as to be electrically connected to an external circuit; and an elastic sealing material is arranged in the gap between the connecting wire and the wire hole to seal the gap.

[0011] According to another exemplary embodiment of the present invention, the moving contact has an electrical connection pin, which passes through the shell and extends to the outside of the shell so as to be electrically connected to an external circuit; an elastic sealing material is arranged in the gap between the electrical connection pin of the moving contact and the shell to seal the gap.

[0012] According to another exemplary embodiment of the present invention, the stationary contact is fixed to the inner wall of the housing.

[0013] According to another exemplary embodiment of the present invention, the contact switch also includes a driving member, which is used to push the elastic sealing member from the outside of the shell to drive the moving contact to move from an open position electrically separated from the static contact to a closed position electrically contacted with the static contact.

[0014] According to another aspect of the present invention, there is provided an elevator control circuit, comprising the aforementioned contact switch.

[0015] According to an exemplary embodiment of the present invention, the elevator control circuit is an elevator door safety control circuit, and the contact switch is connected in series to the elevator door safety control circuit to control the on-off of the elevator door safety control circuit.

[0016] In the aforementioned exemplary embodiments according to the present invention, the moving contact and the stationary contact of the contact switch are accommodated in the internal accommodation cavity of the fully enclosed shell structure, thereby preventing external dust or water vapor from entering the electrical contacts of the contact switch, thereby effectively avoiding the generation of an arc at the moment of the contact switch being turned on and off and avoiding the contact surface of the electrical contact being burned by the arc.

[0017] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram showing a contact switch according to an exemplary embodiment of the present invention, wherein a moving contact and a stationary contact of the contact switch are in an open position;

[0019] Figure 2A schematic diagram of a contact switch according to an exemplary embodiment of the present invention is shown, wherein a moving contact and a stationary contact of the contact switch are in a closed position. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0021] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0022] According to an overall technical concept of the present invention, there is provided a contact switch, comprising: a fully enclosed housing structure having a fully enclosed internal accommodating chamber; a moving contact accommodated in the fully enclosed internal accommodating chamber; and a stationary contact accommodated in the fully enclosed internal accommodating chamber. The fully enclosed housing structure comprises: a housing having an opening formed thereon; and an elastic seal disposed on the opening of the housing and sealing the opening. The moving contact is attached to the elastic seal so that the moving contact can be moved from an open position electrically separated from the stationary contact to a closed position electrically contacted with the stationary contact by pushing the elastic seal from the outside of the housing.

[0023] Figure 1 A schematic diagram showing a contact switch according to an exemplary embodiment of the present invention, wherein a moving contact 100 and a stationary contact 200 of the contact switch are in an open position; Figure 2 A schematic diagram of a contact switch according to an exemplary embodiment of the present invention is shown, wherein a moving contact 100 and a stationary contact 200 of the contact switch are in a closed position.

[0024] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the contact switch includes: a fully enclosed housing structure 10 , 11 , 12 , a moving contact (or referred to as a moving contact) 100 and a stationary contact (or referred to as a stationary contact) 200 .

[0025] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the fully enclosed housing structure 10, 11, 12 has a fully enclosed internal accommodation chamber 1. The moving contact 100 and the stationary contact 200 are accommodated in the fully enclosed internal accommodation chamber 1.

[0026] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the fully enclosed housing structure 10, 11, 12 includes a housing 10 and an elastic seal 11. An opening is formed on the housing 10. The elastic seal 11 is disposed on the opening of the housing 10 and seals the opening. The elastic seal 11 can be adhered to the housing 10 by an adhesive.

[0027] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the moving contact 100 is attached to the elastic seal 11, so that the moving contact 100 can be electrically separated from the static contact 200 by pushing the elastic seal 11 from the outside of the housing 10. Figure 1 The position shown) moves to a closed position ( Figure 2 shown in the position).

[0028] like Figure 2 As shown, in the illustrated embodiment, when the elastic seal 11 is pushed from the outside of the housing 10, the elastic seal 11 is elastically deformed and moves inward, thereby driving the moving contact 100 from the disconnected position ( Figure 1 The position shown) moves to a closed position ( Figure 2 shown in the position).

[0029] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the moving contact 100 can be bonded to the elastic sealing member 11 by a suitable adhesive.

[0030] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, when the external thrust applied to the elastic seal 11 disappears, the elastic seal 11 automatically returns to the initial position ( Figure 1 The movable contact 100 moves from a closed position in electrical contact with the stationary contact 200 to an open position in which the movable contact 100 is electrically separated from the stationary contact 200.

[0031] like Figure 1 In the illustrated embodiment, when the elastic sealing member 11 is in the initial position, the elastic sealing member 11 is in an arch shape protruding outward from the housing 10 .

[0032] In the present invention, since the elastic seal 11 needs to be frequently pushed, the elastic seal 11 needs to have a high fatigue resistance. In an exemplary embodiment of the present invention, the elastic seal 11 can be made of a fatigue-resistant elastic rubber material.

[0033] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the completely enclosed internal accommodating chamber 1 is filled with a gaseous or liquid insulating medium 20, and the moving contact 100 and the stationary contact 200 are immersed in the insulating medium 20. This can further prevent arcs from being generated when the contact switch is turned on and off.

[0034] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the insulating medium 20 may be insulating inert gas or insulating oil.

[0035] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the contact switch further includes a connecting wire 210, and the connecting wire 210 is connected to the stationary contact 200; a wire hole is formed on the housing 10, and the connecting wire 210 is led out to the outside of the housing 10 through the wire hole on the housing 10, so as to be electrically connected to the external circuit. The aforementioned fully enclosed housing structure 10, 11, 12 also includes an elastic sealing material 12 disposed in the gap between the connecting wire 210 and the wire hole, and the elastic sealing material 12 is used to seal the gap between the connecting wire 210 and the wire hole.

[0036] The present invention is not limited to Figure 1 and Figure 2 In the illustrated embodiment, for example, the aforementioned connecting wire 210 is not necessary and can be removed.

[0037] Although not shown in the figure, in another exemplary embodiment of the present invention, the stationary contact 200 has an electrical connection pin, and the electrical connection pin of the stationary contact 200 passes through the housing 10 and extends to the outside of the housing 10 so as to be electrically connected to an external circuit. The aforementioned fully enclosed housing structure 10, 11, 12 also includes an elastic sealing material 12 disposed in the gap between the electrical connection pin of the stationary contact 200 and the housing 10, and the elastic sealing material 12 is used for the gap between the electrical connection pin of the stationary contact 200 and the housing 10.

[0038] Although not shown in the drawings, in an exemplary embodiment of the present invention, the stationary contact 200 may be fixed to the inner wall of the housing 10 .

[0039] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the contact switch also includes a drive member 30, which is used to push the elastic seal 11 from the outside of the housing 10 to drive the moving contact 100 to move from an open position electrically separated from the stationary contact 200 to a closed position electrically contacted with the stationary contact 200.

[0040] In an exemplary embodiment of the present invention, an elevator control circuit is also disclosed. The elevator control circuit includes the aforementioned contact switch.

[0041] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the aforementioned elevator control circuit can be an elevator door (elevator car door or floor door) safety control circuit, and the contact switch is connected in series to the elevator door safety control circuit to control the on and off of the elevator door safety control circuit.

[0042] Those skilled in the art can understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in various embodiments can be freely combined without causing conflicts in structure or principle.

[0043] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0044] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0045] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element reference signs in the claims shall not be construed as limiting the scope of the present invention.

Claims

1. A contact switch, characterized in that: include: A fully enclosed housing structure having a fully enclosed internal accommodating chamber (1); A moving contact (100) is accommodated in the completely enclosed internal accommodation chamber (1); and The static contact (200) is accommodated in the completely enclosed internal accommodation chamber (1). The fully enclosed housing structure comprises: A housing (10) having an opening formed therein; and an elastic sealing member (11) disposed on the opening of the housing (10) and sealing the opening, The moving contact (100) is attached to the elastic seal (11), so that the moving contact (100) can be moved from an open position electrically separated from the stationary contact (200) to a closed position electrically contacted with the stationary contact (200) by pushing the elastic seal (11) from the outside of the housing (10). The stationary contact (200) has an electrical connection pin, and the electrical connection pin of the stationary contact (200) passes through the housing (10) and extends to the outside of the housing (10) so as to be electrically connected to an external circuit.

2. The contact switch according to claim 1, characterized in that: When the external thrust applied to the elastic seal (11) disappears, the elastic seal (11) automatically returns to the initial position by virtue of its own elastic restoring force, and drives the moving contact (100) to move from a closed position in electrical contact with the stationary contact (200) to an open position in electrical separation from the stationary contact (200).

3. The contact switch according to claim 2, characterized in that: When the elastic sealing member (11) is in the initial position, the elastic sealing member (11) is in an arch shape that protrudes outward from the housing (10).

4. The contact switch according to claim 2, characterized in that: The elastic sealing component (11) is an elastic sealing component made of fatigue-resistant elastic rubber material.

5. The contact switch according to claim 1, characterized in that: The completely enclosed internal accommodating chamber (1) is filled with a gaseous or liquid insulating medium (20), and the moving contact (100) and the stationary contact (200) are immersed in the insulating medium (20).

6. The contact switch according to claim 5, characterized in that: The insulating medium (20) is insulating inert gas or insulating oil.

7. The contact switch according to claim 1, characterized in that: The contact switch further comprises a connecting wire (210), wherein the connecting wire (210) is connected to the stationary contact (200); A wire hole is formed on the housing (10), and the connecting wire (210) is led out to the outside of the housing (10) through the wire hole on the housing (10) so as to be electrically connected to an external circuit; and An elastic sealing material (12) is provided in the gap between the connecting wire (210) and the wire hole to seal the gap.

8. The contact switch according to claim 1, characterized in that: An elastic sealing material (12) is provided in the gap between the electrical connection pin of the stationary contact (200) and the housing (10) to seal the gap.

9. The contact switch according to claim 1, characterized in that: The stationary contact (200) is fixed to the inner wall of the housing (10).

10. The contact switch according to claim 1, characterized in that: The contact switch further comprises a driving member (30) for pushing the elastic sealing member (11) from the outside of the housing (10) to drive the moving contact (100) to move from an open position electrically separated from the stationary contact (200) to a closed position electrically contacted with the stationary contact (200).

11. An elevator control circuit, characterized in that: The invention comprises the contact switch as described in any one of claims 1 to 10.

12. The elevator control circuit according to claim 11, characterized in that: The elevator control circuit is an elevator door safety control circuit, and the contact switch is connected in series to the elevator door safety control circuit to control the on and off of the elevator door safety control circuit.

Images