CN211088087U

CN211088087U - Switch contact structure

Info

Publication number: CN211088087U
Application number: CN202020181672.8U
Authority: CN
Inventors: 章卫军; 张希伟; 成瀚
Original assignee: Bull Group Co Ltd
Current assignee: Gongniu Group Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-07-24
Anticipated expiration: 2030-02-18

Abstract

The utility model provides a switch contact structure belongs to electrical apparatus technical field, include: the movable contact piece is welded with a movable contact, wherein the movable contact comprises a movable contact copper-nickel alloy layer and a movable contact silver alloy layer; and the static contact is welded with a static contact, wherein the static contact comprises a static contact copper-nickel alloy layer and a static contact silver alloy layer. The utility model provides a pair of switch contact structure cuts apart into copper-nickel alloy layer and silver alloy layer with the contact to solved under the condition that increases contact thickness and promoted manufacturing cost's problem, the extensive popularization of being convenient for.

Description

Switch contact structure

Technical Field

The utility model belongs to the technical field of electrical apparatus, a switch contact structure is related to.

Background

The switch controls the on-off of the circuit through the contact and the separation of the silver contact of the movable contact and the silver contact of the static contact. In the existing switch industry, most of switch silver contacts are fixed on switch contacts in a riveting mode (as shown in figure 1), gaps are easily left between the silver contacts and the contacts, poor contact is caused, larger contact resistance can be formed, a large amount of heat is generated when a large current is used, contact materials are softened and oxidized, the conductive capacity is further reduced, the switch is burnt when the large current is serious, and even fire is caused. In addition, along with the frequent going on of switch on-off operation, the riveting clearance between silver contact and the contact constantly changes, and riveting firmness descends gradually, and its stability of leading to electrical stability and reliability continuously worsen, causes the incident under the special circumstances.

Chinese patent (CN206379280U) discloses a welding contact of switch wane, including wane and contact, the wane has the contact welding part, and the contact welding part includes upper surface and lower face of weld, and the contact includes face of weld and contact lower surface on the contact, and the face of weld is fixed as integral type structure through the lower face of weld of face of weld on the contact and the contact welding part between contact and the wane. The upper welding surface of the contact is provided with a welding salient point. The lower weld face of the contact weld is planar. The welding salient points comprise large salient points and a plurality of small salient points, the thickness of the large salient points is larger than that of the small salient points, the small salient points are arranged on the welding surface of the contact on the periphery of the large salient points in a surrounding mode, and the distances among the small salient points are equal.

However, the contact is made of only one material, and if the thickness of the contact needs to be changed or the relative distance between the movable contact piece and the static contact piece needs to be changed, the thickness of the contact needs to be increased, and the contact is generally made of silver alloy material, so that the corresponding production cost is increased, and the popularization is not facilitated.

Disclosure of Invention

The utility model aims at having above-mentioned problem to current technique, having proposed one kind under the condition that increases contact thickness, do not increase manufacturing cost's switch contact structure.

The purpose of the utility model can be realized by the following technical proposal: a switch contact structure comprising:

the movable contact piece is welded with a movable contact, wherein the movable contact comprises a movable contact copper-nickel alloy layer and a movable contact silver alloy layer;

and the static contact is welded with a static contact, wherein the static contact comprises a static contact copper-nickel alloy layer and a static contact silver alloy layer.

In the switch contact structure, a pure silver layer is arranged between the moving contact copper-nickel alloy layer and the moving contact silver alloy layer or between the static contact copper-nickel alloy layer and the static contact silver alloy layer.

In the switch contact structure, when the moving contact copper-nickel alloy layer and the moving contact silver alloy layer are integrally arranged, or the fixed contact copper-nickel alloy layer and the fixed contact silver alloy layer are integrally arranged, a moving contact silver alloy composite layer or a fixed contact silver alloy composite layer is formed.

In the switch contact structure, when the movable contact copper-nickel alloy layer and the movable contact are integrally arranged or the static contact copper-nickel alloy layer and the static contact are integrally arranged, the movable contact or the static contact is arranged in a step-shaped structure.

In the above switch contact structure, when the movable contact piece or the fixed contact piece is in a step-like structure, a convex part is arranged on each of the movable contact piece or the fixed contact piece, wherein the movable contact silver alloy layer or the fixed contact silver alloy layer is positioned on the convex part.

In the above switch contact structure, when the movable contact piece or the static contact piece is in a step-shaped structure, the movable contact piece or the static contact piece is arranged in a square wave structure or in a zigzag structure.

In the above-described switch contact structure, the movable contact piece, the movable contact, the stationary contact piece, and the stationary contact are all formed by punching.

Compared with the prior art, the utility model provides a pair of switch contact structure cuts apart into copper-nickel alloy layer and silver alloy layer with the contact to solved under the condition that increases contact thickness and promoted manufacturing cost's problem, the wide popularization of being convenient for.

Drawings

Fig. 1 is a schematic diagram of a switch contact structure in an open state in the prior art.

Fig. 2 is a schematic structural diagram of the switch contact structure of the present invention in an off state.

Fig. 3 is a schematic structural diagram of another embodiment of the switch contact structure of the present invention in an off state.

Fig. 4 is a schematic structural diagram of a third embodiment of the switch contact structure of the present invention in an off state.

In the figure, 100, a movable contact; 200. a movable contact; 210. the moving contact is a copper-nickel alloy layer; 220. a moving contact silver alloy layer; 300. a static contact piece; 400. a stationary contact; 410. a stationary contact copper-nickel alloy layer; 420. a static contact silver alloy layer; 500. a convex portion.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 2, the utility model provides a switch contact structure, include: a moving contact piece 100 on which a moving contact 200 is welded, wherein the moving contact 200 comprises a moving contact copper-nickel alloy layer 210 and a moving contact silver alloy layer 220; a stationary contact 300 having a stationary contact 400 bonded thereto, wherein the stationary contact 400 includes a stationary contact cupronickel alloy layer 410, and a stationary contact silver alloy layer 420.

In the following description, the movable contact 200 and the fixed contact 400 are collectively referred to as a contact, the movable contact cupronickel layer 210 and the fixed contact cupronickel layer 410 are collectively referred to as a cupronickel layer, and the movable contact silver alloy layer 220 and the fixed contact silver alloy layer 420 are collectively referred to as a silver alloy layer.

In this embodiment, if the thickness of the contact needs to be increased, or the relative distance between the movable contact piece 100 and the stationary contact piece 300 needs to be changed, the thickness of the copper-nickel alloy layer can be increased, because the increase of the thickness of the copper-nickel alloy layer increases the production cost price of the whole switch contact structure, the influence is small, and the reliability of the use of the switch contact structure can be ensured.

The utility model provides a pair of switch contact structure cuts apart into copper-nickel alloy layer and silver alloy layer with the contact to solved under the condition that increases contact thickness and promoted manufacturing cost's problem, the extensive popularization of being convenient for.

Further preferably, the copper-nickel alloy layer and the silver alloy layer form a silver alloy composite layer. In the present embodiment, the silver alloy composite layer is formed by press molding, and the shape of the formed silver alloy composite layer is not limited, and may be a cylindrical body having a circular cross section, a cylindrical body having a square cross section, a trapezoidal cylindrical body, or the like.

Further preferably, the contact blades are formed by stamping from a strip of copper alloy.

Further preferably, the contact piece and the contact are directly welded into a whole through a resistance welding process.

Preferably, a layer of pure silver is provided between the layer of cupronickel alloy and the layer of silver alloy, as shown in fig. 2. Thereby further improving the conductivity of the switch contacts.

Example two

As shown in fig. 3, the difference between the first embodiment and the second embodiment is that in the present embodiment, the cu-ni alloy layer and the contact are integrated, so that the contact has a step-like structure. If the thickness of the contact is changed or the relative distance between the movable contact piece 100 and the static contact piece 300 is changed, the height of the step of the contact piece is only required to be increased, and the contact piece is made of copper alloy, so that the increase of the height of the step (namely the increase of the copper alloy material) does not increase great production cost.

It is further preferable that, when the contact is provided in a stepped structure, a convex portion 500 is provided on the contact, wherein the convex portion 500 serves as a mounting position of the contact.

Further preferably, the stepped contact pieces are arranged in a square wave structure.

EXAMPLE III

As shown in fig. 4, the difference between the present embodiment and the second embodiment is that, in the present embodiment, the step-shaped contact pieces are arranged in a zigzag configuration.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A switch contact structure, comprising:

the moving contact piece (100) is welded with a moving contact (200), wherein the moving contact (200) comprises a moving contact copper-nickel alloy layer (210) and a moving contact silver alloy layer (220);

the static contact piece (300) is welded with a static contact (400), wherein the static contact (400) comprises a static contact copper-nickel alloy layer (410) and a static contact silver alloy layer (420).

2. A switch contact structure according to claim 1, characterized in that a layer of pure silver is provided between the moving contact layer of cupronickel alloy (210) and the moving contact layer of silver alloy (220), or between the stationary contact layer of cupronickel alloy (410) and the stationary contact layer of silver alloy (420).

3. The switch contact structure according to claim 1, wherein when the moving contact cupronickel layer (210) is integrally provided with the moving contact silver alloy layer (220), or the stationary contact cupronickel layer (410) is integrally provided with the stationary contact silver alloy layer (420), the moving contact (200) silver alloy composite layer or the stationary contact (400) silver alloy composite layer is formed.

4. The switch contact structure according to claim 1, wherein when the moving contact cupronickel layer (210) is integrally provided with the moving contact piece (100) or the stationary contact cupronickel layer (410) is integrally provided with the stationary contact piece (300), the moving contact piece (100) or the stationary contact piece (300) is provided in a stepped structure.

5. The switch contact structure according to claim 1, wherein when the movable contact piece (100) or the stationary contact piece (300) has a stepped structure, a convex portion (500) is provided on each of the movable contact piece (100) or the stationary contact piece (300), and wherein the movable contact silver alloy layer (220) or the stationary contact silver alloy layer (420) is provided on the convex portion (500).

6. The switch contact structure according to claim 1, wherein when the movable contact piece (100) or the stationary contact piece (300) has a stepped structure, the movable contact piece (100) or the stationary contact piece (300) is disposed in a square wave structure or a zigzag structure.

7. The switch contact structure according to claim 1, wherein the movable contact piece (100), the movable contact (200), the stationary contact piece (300), and the stationary contact (400) are formed in a stamping manner.