Contact system of a switch element

Abstract

The present invention discloses a contact system of a switch element, which comprises a mounting seat (1), a moving contact sliding assembly (2) and a stationary contact (3), wherein the stationary contact (3) is fixedly mounted in a cavity (101) in the mounting seat (1), and the moving contact slider assembly (2) is mounted in the cavity (101) in the mounting seat (1) and can slide, and is characterized in that: the projections of the moving contact (201) in the moving contact sliding assembly (2) and the stationary contact (3) on a vertical plane do not overlap when the switch opening distance is maximum, and the moving contact sliding assembly (2) and the stationary contact (3) adopt a sliding snapping contact during the sliding process. The contact system of the switch element changes the traditional impact contact into a sliding snapping contact, thereby reducing the impact force of the contact and avoiding the wear of the moving and stationary contacts; at the same time, the moving and stationary contacts have a spacing not only in the horizontal direction but also in the vertical direction, which is conducive to increasing the opening distance and improving the performance of the switch element.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical components, and specifically relates to a contact system of a switch component, and is particularly suitable for a contact system of a translational plug-in conversion isolating switch. Background Art

[0002] like Figure 1 As shown, the translational plug-in transfer isolating switch moves on a plane by pushing and pulling the slider, so that the moving contact arranged on the slider contacts and disconnects with the fixed static contact, and can be applied to various distribution lines that need to be cut off or isolated.

[0003] Traditionally, in order to ensure more reliable contact, the projection of the moving contact on the vertical plane and the projection of the static contact on the vertical plane of the horizontal plug-in transfer disconnector have an intersection in the open state. When the mechanism moves the slider assembly to make the moving and static contacts just make contact, the static contact will rigidly push the moving contact apart, resulting in a hard impact, which will aggravate contact wear and may also cause contact damage. At the same time, a larger closing force is required to ensure a reliable closing position. However, the hard impact and friction of the moving and static contacts during this closing process will reduce the contact closing and opening speed and reduce the breaking performance of the switch element; at the same time, the moving and static contacts only move on one plane, so when opening, the opening distance is only determined by the vertical distance between the moving and static contacts. Due to the limited space in the switch, there are certain restrictions on increasing the opening distance, which is not conducive to improving the performance of the switch element. Summary of the invention

[0004] The purpose of the present invention is to provide a contact system for a switch element in order to address the technical defects of the contact system of the above-mentioned existing translational plug-in conversion isolating switch, such as the hard impact during closing that easily wears the contacts and reduces the breaking performance and is difficult to increase the opening distance. The contact system changes the traditional impact-type contact into a sliding and snapping contact, thereby reducing the impact force of the contact and avoiding the wear of the moving and static contacts. At the same time, the moving and static contacts are spaced apart not only in the horizontal direction but also in the vertical direction, which is conducive to increasing the opening distance and improving the performance of the switch element.

[0005] Technical Solution

[0006] In order to achieve the above technical objectives, the present invention designs a contact system of a switch element, which includes a mounting seat, a moving contact sliding assembly and a static contact, wherein the static contact is fixedly mounted in a cavity in the mounting seat, the moving contact slider assembly is mounted in the cavity in the mounting seat and can slide, and the moving contact sliding assembly can engage and separate with the static contact during sliding to realize the on and off of the switch, and is characterized in that: the projections of the moving contact in the moving contact sliding assembly and the static contact on the vertical plane are non-overlapping when the switch opening distance is maximum, and the moving contact sliding assembly adopts a sliding and snapping contact with the static contact during sliding.

[0007] Furthermore, the moving contact sliding assembly includes a slider, at least one pressure plate is installed in a slide groove in the slider, the moving contact is fixedly installed at the end of the pressure plate outside the slide groove and at a position corresponding to the static contact, an elastic member is installed on the pressure plate, and a limit block is provided in the cavity. During the sliding process of the moving contact sliding assembly in the cavity, the limit block can push the elastic member to drive the pressure plate to slide in the slide groove so that the moving contact contacts the corresponding static contact, and the pressure plate is connected to a reset element, and the pressure plate can slide and reset in the slide groove under the action of the reset element.

[0008] Preferably, there are two static contacts, which are symmetrically arranged on the front and rear sides of the cavity in the mounting seat, and there are two pressure plates, which are symmetrically arranged on the upper and lower sides of the slide slot. The two ends of the reset element respectively abut against the inner side surfaces of the two pressure plates, and the two moving contacts are respectively fixedly mounted on the ends of the two pressure plates outside the slide slot corresponding to the static contacts, and the two elastic members are respectively fixedly mounted on the ends of the pressure plates outside the slide slot corresponding to the four limit blocks.

[0009] Furthermore, the mounting seat includes a base and a cover plate, the base and the cover plate are assembled together to form a cavity, and four limit blocks are arranged on the corresponding base and cover plate.

[0010] Furthermore, the elastic member can also be mounted on the mounting seat.

[0011] Preferably, the elastic member is a leaf spring or a torsion spring.

[0012] Preferably, the reset element is a compression spring or rubber.

[0013] Beneficial Effects

[0014] The present invention provides a contact system for a switch element, which changes the traditional impact-type contact into a sliding and snapping contact, thereby eliminating the hard impact during closing, reducing the closing force, reducing contact wear and damage caused by contact impact, and improving the contact closing and opening speed; at the same time, the distance between the moving and static contacts in the vertical direction is increased, the opening distance of the contacts is increased, and the performance of the switch is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the existing switch contact structure.

[0016] Attached Figure 2 It is a schematic diagram of the structure of the switch contact in Example 1 of the present invention.

[0017] Attached Figure 3 It is a schematic diagram of the structure of the moving contact sliding assembly in Example 1 of the present invention.

[0018] Attached Figure 4It is a structural schematic diagram of the installation of the elastic member in Example 1 of the present invention.

[0019] Attached Figure 5 It is a schematic diagram of embodiment 1 of the present invention in a closed state.

[0020] Attached Figure 6 It is a schematic diagram of the structure of the switch contact in embodiment 2 of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] As attached Figure 2 As shown, a contact system of a switch element comprises a mounting seat 1, a moving contact sliding assembly 2 and a stationary contact 3, wherein the mounting seat 1 comprises a base 102 and a cover plate 103, wherein the base 102 and the cover plate 103 are assembled together to form a cavity 101, wherein the stationary contact 3 is fixedly mounted in the cavity 101 in the mounting seat 1, wherein the moving contact slider assembly 2 is mounted in the cavity 101 in the mounting seat 1 and can slide, wherein the moving contact sliding assembly 2 can engage with and separate from the stationary contact 3 during sliding to realize the on-off of the switch, wherein the projections of the moving contact 201 in the moving contact sliding assembly 2 and the stationary contact 3 on the vertical plane when the switch opening distance is maximum are not overlapped, wherein the moving contact sliding assembly 2 gradually approaches the stationary contact 3 during sliding, and finally makes snap-fit ​​contact and slides to the closed position.

[0023] The first specific embodiment provided by the present invention is as shown in the attached Figure 3 As shown, the moving contact sliding assembly 2 includes a slider 202, at least one pressure plate 203 is installed in the slide groove 202a in the slider 202, the moving contact 201 is fixedly installed at the end of the pressure plate 203 outside the slide groove 202a and at a position corresponding to the static contact 3, the pressure plate 203 is provided with an elastic member 204, and a limit block 101a is provided in the cavity 101. During the sliding process of the moving contact sliding assembly 2 in the cavity 101, the limit block 101a can push the elastic member 204 to drive the pressure plate 203 to slide in the slide groove 202a so that the moving contact 201 contacts the corresponding static contact 3, and the pressure plate 203 is connected to a reset element 4, and the pressure plate 203 can slide and reset in the slide groove 202a under the action of the reset element 4.

[0024] As a preferred option, Figure 4As shown, in this embodiment, the static contacts 3 are two pieces, symmetrically arranged on the front and rear sides of the cavity 101 in the mounting seat 1, the pressure plates 203 are two pieces, symmetrically arranged on the upper and lower sides of the slide slot 202a, the two ends of the reset element 4 respectively abut the inner side surfaces of the two pressure plates 203, the two moving contacts 201 are respectively fixedly mounted on the ends of the two pressure plates 203 outside the slide slot 202a corresponding to the static contacts 3, and the two elastic members 204 are respectively fixedly mounted on the ends of the pressure plates 203 outside the slide slot 202a corresponding to the four limit blocks 101a. The four limit blocks 101a are arranged on the corresponding base 102 and cover plate 103. The elastic member 204 is a spring sheet or a torsion spring. The reset element 4 is a compression spring or rubber.

[0025] The working process of this embodiment is: when closing the circuit breaker, the mechanism moves the contact sliding assembly 2, and the moving contact 201 moves with the moving contact sliding assembly 2 to the vicinity above the static contact 3, that is, when the projection of the moving contact on the horizontal plane and the projection of the static contact on the horizontal plane are about to intersect or just intersect or just intersect, the limit block 101a compresses the elastic member 204, so that the moving contact 201 slides and snaps into contact when it partially enters the static contact 3, and at the same time reversely compresses the reset element 4. After contact, the moving contact sliding assembly 2 continues to move, and the moving contact 201 will press the static contact 3 to continue to slide to the closing position, as shown in the attached figure. Figure 5 shown.

[0026] When opening the switch, the mechanism moves the moving contact sliding assembly 2, and the moving contact 201 gradually starts to move away from the static contact 3 along with the moving contact sliding assembly 2. The limit block 101a releases the compression on the elastic member 204, so that the elastic member 204 gradually recovers to the state of no force compression, and the moving contact 201 separates from the static contact 3. The moving contact 201 continues to slide along with the reset element 4, and the moving contact sliding assembly 2 continues to move. The moving contact 201 continues to slide away from the static contact 3 to the opening position along with the moving contact sliding assembly 2 under the action of the reset element 4, as shown in the attached figure. Figure 2 shown.

[0027] Another specific embodiment provided by the present invention is as shown in the attached Figure 6 As shown, the elastic member 204 can also be mounted on the mounting seat 1. The working process is the same as that of the first embodiment and will not be further described here.

[0028] The structures, proportions, sizes, quantities, etc. illustrated in the accompanying drawings of the embodiments of the present invention are only used to match the contents disclosed in the specification so as to be understood and read by those familiar with the technology, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. cited in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A contact system of a switch element, comprising a mounting seat (1), a moving contact sliding assembly (2) and a stationary contact (3), wherein the stationary contact (3) is fixedly mounted in a cavity (101) in the mounting seat (1), the moving contact sliding assembly (2) is mounted in the cavity (101) in the mounting seat (1) and can slide, and the moving contact sliding assembly (2) can engage with and separate from the stationary contact (3) during the sliding process to realize the on and off of the switch, characterized in that: The projections of the moving contact (201) in the moving contact sliding assembly (2) and the stationary contact (3) on the vertical plane and the horizontal plane do not overlap when the switch opening distance is maximum, and the moving contact sliding assembly (2) is in sliding contact with the stationary contact (3) in a sliding manner during the sliding process.

2. A contact system for a switch element according to claim 1, characterized in that: The moving contact sliding assembly (2) comprises a slider (202), at least one pressing plate (203) is mounted in a sliding groove (202a) in the slider (202), the moving contact (201) is fixedly mounted on the end of the pressing plate (203) outside the sliding groove (202a) at a position corresponding to the stationary contact (3), the pressing plate (203) is equipped with an elastic member (204), a limit block (101a) is provided in the cavity (101), and the moving contact sliding assembly (202) is provided with a movable contact (201). When the component (2) slides in the cavity (101), the limit block (101a) can push the elastic member (204) to drive the pressure plate (203) to slide in the slide groove (202a), thereby bringing the moving contact (201) into contact with the corresponding static contact (3); the pressure plate (203) is connected to a reset element (4); and the pressure plate (203) can slide and reset in the slide groove (202a) under the action of the reset element (4).

3. A contact system for a switch element according to claim 2, characterized in that: The static contacts (3) are in two pieces and are symmetrically arranged on the front and rear sides of the cavity (101) in the mounting seat (1); the pressure plates (203) are in two pieces and are symmetrically arranged on the upper and lower sides of the slide groove (202a); the two ends of the reset element (4) respectively abut against the inner side surfaces of the two pressure plates (203); the two moving contacts (201) are respectively fixedly mounted on the ends of the two pressure plates (203) outside the slide groove (202a) corresponding to the static contacts (3); and the two elastic members (204) are respectively fixedly mounted on the ends of the pressure plates (203) outside the slide groove (202a) corresponding to the four limit blocks (101a).

4. A contact system for a switch element according to claim 3, characterized in that: The mounting seat (1) comprises a base (102) and a cover plate (103); the base (102) and the cover plate (103) are assembled together to form a cavity (101); and four limit blocks (101a) are arranged on the corresponding base (102) and cover plate (103).

5. A contact system for a switch element according to claim 2, characterized in that: The elastic member (204) can also be mounted on the mounting seat (1).

6. A contact system for a switch element according to claim 2, characterized in that: The elastic member (204) is a spring sheet or a torsion spring.

7. A contact system for a switch element according to claim 2, characterized in that: The resetting element (4) is a compression spring or rubber.

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