Contact piece clamping conductive structure and rotary disconnecting switch

Abstract

The utility model belongs to the technical field of low-voltage switches, and particularly relates to a contact piece clamping conductive structure and a rotary disconnecting switch. The contact piece clamping conductive structure comprises a first contact piece, a second contact piece and a first elastic piece and further comprises a second elastic piece, the second elastic piece is provided with a fixed end directly connected with the first insulating piece, a free end connected with the first elastic piece and a deformation main body connected with the fixed end and the free end, and when the deformation main body deforms, the first elastic piece and the second elastic piece are clamped. And the free end forms an elastic acting force on the first elastic piece, which tends to the first contact piece. The second elastic piece with one side supporting the first elastic piece and the other side fixed on the insulating piece is designed on the periphery of the original first elastic piece, the second elastic piece is not a conductive piece or a small part of the second elastic piece is conductive, the second elastic piece is mainly influenced by heat radiation, the temperature is lower than that of the conductive piece, the influence on the elastic performance is smaller, and effective contact pressure can be kept for a long time; and faults such as switch fire caused by abnormal heating due to contact pressure reduction can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage switches, and in particular relates to a contact piece clamping conductive structure and a rotary isolating switch. Background Art

[0002] At present, most of the contact springs on the market that maintain contact pressure are single elastic member structures, and the elastic member is basically made of metal material and connected to the moving contact or the static contact, such as the structure of the static contact assembly disclosed in the applicant's prior patent CN202321239831.5 and the structure of the moving contact assembly disclosed in the applicant's prior patent CN201920129687.7. The applicant further discovered that due to this structure, when the moving and static contacts are energized, the elastic member will also act as a conductive member to circulate current. At this time, in addition to being affected by the heat radiation conduction between the moving and static contacts, the elastic member also generates heat itself, resulting in a higher temperature. As an elastic member, long-term exposure to high temperature has a greater impact on the elasticity of the material. After a certain period of time, the contact pressure formed by the elastic member decreases, and abnormal heating leads to switch fires and other faults. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a contact piece clamping conductive structure and a rotary isolating switch.

[0004] The technical solution adopted by the utility model is as follows: a contact-clamping conductive structure, comprising a first contact, a second contact, and a first elastic member connected to the first contact, wherein the first contact and the second contact have a relative movable relationship so that the first contact and the second contact are in a closed position in which they are in contact and a disconnected position in which the first contact and the second contact are no longer in contact, and when the first contact and the second contact are in the closed position, the first elastic member forms an elastic force that makes the first contact and the second contact fit each other, and also includes a second elastic member, wherein the second elastic member has a fixed end directly connected to the first insulating member, a free end connected to the first elastic member, and a deformation body connecting the fixed end and the free end, and when the deformation body is deformed, the free end forms an elastic force on the first elastic member toward the first contact.

[0005] The first elastic member is a first elastic member, and the first elastic member is connected to the first contact piece to form a clamping cavity with an opening. When the first contact piece and the second contact piece are in a closed position, the second contact piece extends into the clamping cavity through the opening, and the first elastic member forms an elastic force on the second contact piece toward the first contact piece.

[0006] The first contact piece is provided with two pieces and a clamping cavity with an opening is formed between the two first contact pieces. The first elastic member directly acts on the first contact piece to form an elastic force on the first contact piece toward the second contact piece.

[0007] A second insulating member is fixed to the back of the first elastic member, and the free end of the second elastic member is directly connected to the second insulating member. A rotary isolating switch comprises an insulating housing, a moving contact assembly and a stationary contact assembly, wherein the stationary contact assembly is fixed relative to the insulating housing, and the moving contact assembly can rotate relative to the insulating housing to form a switching action with the stationary contact assembly, wherein the moving contact assembly and the stationary contact assembly comprise the contact piece clamping conductive structure as described above.

[0008] The stationary contact assembly includes a first contact piece, the moving contact assembly includes a second contact piece, and the first insulating member is an insulating shell.

[0009] The first contact piece has a flat contact plate, the first elastic member includes a first plate, an inclined plate, and a second plate connected in sequence, the first plate is fixedly connected to the contact plate, and the second plate is spaced a certain distance from the contact plate to form an open clamping cavity.

[0010] The first flat plate and the contact plate are fixed by riveting.

[0011] The second elastic member is a compression spring, the insulating housing protrudes to form a limiting column, and the second elastic member is sleeved outside the limiting column.

[0012] The stationary contact assembly includes a second contact piece, the moving contact assembly includes a first contact piece and a moving contact rotating frame made of an insulating material, and the first insulating member is the moving contact rotating frame.

[0013] The beneficial effects of the utility model are as follows: the utility model designs a second elastic member around the original first elastic member, which supports the first elastic member on one side and is fixed on the insulating member on the other side. The second elastic member is not a conductive member or only a small part of it is conductive. It is mainly affected by heat radiation and its temperature is lower than that of the conductive member, which has less impact on the elastic performance. It can maintain effective contact pressure for a long time and will not cause abnormal heating due to reduced contact pressure, resulting in switch fire and other faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0015] Figure 1 A schematic diagram of a structure of a contact sheet clamping a conductive structure provided in Example 1 of the utility model;

[0016] Figure 2A schematic diagram of another structure of a contact sheet clamping a conductive structure provided in Embodiment 2 of the present utility model;

[0017] Figure 3 A schematic diagram of another structure of a contact sheet clamping a conductive structure provided in Embodiment 3 of the present utility model;

[0018] Figure 4 It is a structural schematic diagram of a rotary isolating switch;

[0019] Figure 5 It is a partial structural schematic diagram of a static contact of a rotary isolating switch of the utility model;

[0020] Figure 6 This is a cross-sectional view of the cooperation between the static contact and the insulating housing of Embodiment 4 of the utility model;

[0021] Figure 7 This is a schematic structural diagram of the moving contact assembly in Embodiment 5 of the present utility model;

[0022] Figure 8 It is a cross-sectional view of the moving contact assembly in Embodiment 5 of the present utility model;

[0023] In the figure,

[0024] The first contact piece-1, the second contact piece-2, the first elastic member-3, the first plate-301, the inclined plate-302, the second plate-303, the second elastic member-4, the first insulating member-5, the second insulating member-6, the moving contact assembly-7, the moving contact rotating frame-701, the static contact assembly-8, the insulating shell-9, and the limiting column-901. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0026] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0027] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] This embodiment provides a contact sheet clamping conductive structure, the structure of which is as follows Figure 1 , including a first contact piece 1, a second contact piece 2, a first elastic member 3, and a second elastic member 4. The first elastic member 3 is connected to the first contact piece 1 to form a clamping cavity with an opening. The first contact piece 1 and the second contact piece 2 have a relative movable relationship so that the second contact piece 2 can move relative to the first contact piece 1 and has a closed position extending into the clamping cavity through the opening and an open position leaving the clamping cavity. When the second contact piece 2 is in the closed position, the first elastic member 3 forms an elastic force on the second contact piece 2 toward the first contact piece 1. The second elastic member 4 is composed of a fixed end, a free end and a deformation body connecting the fixed end and the free end. The fixed end of the second elastic member 4 is directly connected to the first insulating member 5, and the free end of the second elastic member 4 is connected to the first elastic member 3. When the deformation body is deformed, the free end forms an elastic force on the first elastic member 3 toward the first contact piece 1.

[0030] The free end of the second elastic member 4 is directly connected to the first elastic member 3. Only a small portion where the free end of the second elastic member 4 is in contact with the first elastic member 3 will be electrically conductive, thereby reducing the impact on the elastic performance.

[0031] The second elastic member 4 can specifically be a common elastic member such as a compression spring, a metal spring sheet, a disc spring assembly, etc.

[0032] Embodiment 2:

[0033] This embodiment provides a contact sheet clamping conductive structure, the structure of which is as follows Figure 2 , including a first contact piece 1, a second contact piece 2, a first elastic member 3, and a second elastic member 4. The first contact piece 1 is provided with two and the two first contact pieces 1 form a clamping cavity with an opening. The first contact piece 1 and the second contact piece 2 have a relative movable relationship so that the second contact piece 2 can move relative to the first contact piece 1 and has a closed position extending into the clamping cavity through the opening and an open position leaving the clamping cavity. The first elastic member 3 directly acts on the first contact piece 1 to form an elastic force on the first contact piece 1 toward the second contact piece 2.

[0034] The free end of the second elastic member 4 is directly connected to the first elastic member 3. Only a small portion where the free end of the second elastic member 4 is in contact with the first elastic member 3 will be electrically conductive, thereby reducing the impact on the elastic performance.

[0035] The second elastic member 4 can specifically be a common elastic member such as a compression spring, a metal spring sheet, a disc spring assembly, etc.

[0036] Embodiment 3:

[0037] This embodiment provides a contact sheet clamping conductive structure, specifically, based on the embodiment 1 or embodiment 2, such as Figure 3 As shown, a second insulating member 6 is fixed on the back of the first elastic member 3 , and a free end of the second elastic member 4 is directly connected to the second insulating member 6 . Figure 3 The structure shown enables both ends of the second elastic member 4 to be matched with insulating members, so that the second elastic member 4 further reduces the passage of current and reduces the heat generated when the second elastic member 4 is in contact with electricity.

[0038] Embodiment 4:

[0039] This embodiment provides a rotary isolating switch, such as Figure 4 As shown, it includes an insulating shell 9, a moving contact assembly 7 and a stationary contact assembly 8. The stationary contact assembly 8 is fixed relative to the insulating shell 9, and the moving contact assembly 7 can rotate relative to the insulating shell 9 to form an opening and closing action with the stationary contact assembly 8.

[0040] The contact piece clamping conductive structure of embodiment 1 is provided in the rotary isolating switch.

[0041] Specifically, the structure on the first contact piece is applied to the static contact, and the structure on the second contact piece is applied to the moving contact, that is, the static contact assembly 8 includes a first contact piece 1, and the moving contact assembly 7 includes a second contact piece 2. The insulating shell 9 can directly serve as the first insulating part 5 to fix the second elastic part 4.

[0042] Specifically, Figure 5 The figure shows a specific implementation structure of a stationary contact. The first contact piece 1 has a flat contact plate 101. The first elastic member 3 includes a first flat plate 301, an inclined plate 302, and a second flat plate 303 connected in sequence. The first flat plate 301 is fixedly connected to the contact plate 101. The second flat plate 303 is spaced a certain distance from the contact plate 101 to form an open clamping cavity. The first flat plate 301 is fixed to the contact plate 101 by riveting. Figure 6 As shown, the second elastic member 4 is a compression spring, the insulating housing 9 protrudes to form a limiting column 901, and the second elastic member 4 is sleeved outside the limiting column 901. During installation, the second elastic member 4 is first installed outside the limiting column 901 of the insulating housing 9, and then the static contact assembly 8 is directly installed. During installation, the first elastic member 3 needs to be installed downward.

[0043] Embodiment 5:

[0044] This embodiment provides a rotary isolating switch, such as Figure 4 As shown, it includes an insulating shell 9, a moving contact assembly 7 and a stationary contact assembly 8. The stationary contact assembly 8 is fixed relative to the insulating shell 9, and the moving contact assembly 7 can rotate relative to the insulating shell 9 to form an opening and closing action with the stationary contact assembly 8.

[0045] The contact piece clamping conductive structure of embodiment 2 is provided in the rotary isolating switch.

[0046] Specifically, the structure on the first contact piece is applied to the moving contact, and the structure on the second contact piece is applied to the stationary contact, that is, the moving contact assembly 7 includes a first contact piece 1, and the stationary contact assembly 8 includes a second contact piece 2. The insulating rotating frame 701 of the moving contact assembly 7 can directly serve as the first insulating member 5 to fix the second elastic member 4.

[0047] Specifically, Figure 7 , Figure 8 What is shown is the specific implementation structure of the moving contact assembly, wherein an open clamping cavity is formed between the two first contact pieces 1, and bow-shaped spring pieces are respectively provided outside the two first contact pieces 1, serving as the first elastic member 3 to form a clamping elastic force on the first contact pieces 1, and the second elastic member 4 is a compression spring, which is abutted between the first elastic member 3 and the insulating rotating frame 701.

[0048] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A contact-clamping conductive structure, comprising a first contact, a second contact, and a first elastic member connected to the first contact, wherein the first contact and the second contact are in a relative movable relationship so that the first contact and the second contact are in a closed position in which the first contact and the second contact are in contact and in an open position in which the first contact and the second contact are no longer in contact, and when the first contact and the second contact are in the closed position, the first elastic member forms an elastic force that causes the first contact and the second contact to fit each other, characterized in that: It also includes a second elastic member, which has a fixed end directly connected to the first insulating member, a free end connected to the spring sheet, and a deformable body connecting the fixed end and the free end. When the deformable body is deformed, the free end forms an elastic force on the first elastic member toward the first contact sheet.

2. The contact-clamping conductive structure according to claim 1, characterized in that: The first elastic member is a spring, and the first elastic member is connected to the first contact piece to form a clamping cavity with an opening. When the first contact piece and the second contact piece are in a closed position, the second contact piece extends into the clamping cavity through the opening, and the first elastic member exerts an elastic force on the second contact piece toward the first contact piece.

3. The contact-clamping conductive structure according to claim 1, characterized in that: The first contact piece is provided with two pieces and a clamping cavity with an opening is formed between the two first contact pieces. The first elastic member directly acts on the first contact piece to form an elastic force on the first contact piece toward the second contact piece.

4. The contact-clamping conductive structure according to claim 1, characterized in that: A second insulating member is fixed to the back side of the first elastic member, and a free end of the second elastic member is directly connected to the second insulating member.

5. A rotary disconnector, comprising an insulating housing, a moving contact assembly and a stationary contact assembly, wherein the stationary contact assembly is fixed relative to the insulating housing, and the moving contact assembly can rotate relative to the insulating housing to form an opening and closing action with the stationary contact assembly, characterized in that: The movable contact assembly and the stationary contact assembly comprise a contact piece clamping conductive structure as described in any one of claims 1 to 4.

6. The rotary isolating switch according to claim 5, characterized in that: The stationary contact assembly includes a first contact piece, the moving contact assembly includes a second contact piece, and the first insulating member is an insulating shell.

7. The rotary isolating switch according to claim 6, characterized in that: The first contact piece has a flat contact plate, the first elastic member includes a first plate, an inclined plate, and a second plate connected in sequence, the first plate is fixedly connected to the contact plate, and the second plate is spaced a certain distance from the contact plate to form an open clamping cavity.

8. The rotary isolating switch according to claim 7, characterized in that: The first flat plate and the contact plate are fixed by riveting.

9. The rotary isolating switch according to claim 6, characterized in that: The second elastic member is a compression spring, the insulating housing protrudes to form a limiting column, and the second elastic member is sleeved outside the limiting column.

10. The rotary isolating switch according to claim 5, characterized in that: The stationary contact assembly includes a second contact piece, the moving contact assembly includes a first contact piece and a moving contact rotating frame made of an insulating material, and the first insulating member is the moving contact rotating frame.

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