Contact structure of rotary switch
By using the contact part of the bidirectional elastic clamping force in the rotary switch, the problem of the reduction of clamping force of the static contact is solved, and more reliable current conduction and extended service life are achieved.
Patent Information
- Application Number
- CN202421064955.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The static contact opening clamping structure of the existing rotary switch relies on the single-sided elastic plate to provide clamping force, resulting in a poor clamping effect after a large number of disconnection operations, resulting in unreliable current conduction during closing.
The contact part of the bidirectional elastic clamping force is adopted, including two contact plates and elastic metal strips, and the relative position and clamping force of the contact plate are ensured through a C-type structure and positioning component to form a more reliable clamping structure.
It improves the clamping effect of the static contact of the rotary switch, extends the service life, and ensures the reliability of current conduction when closing.
Smart Images
Figure CN222281791U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of rotary switches, and in particular relates to a contact structure of a rotary switch. Background Art
[0002] The applicant's prior patent CN202321239831.5 discloses a rotary switch, including a housing and a moving contact assembly, a static contact assembly, and an arc extinguishing chamber. The two ends of the moving contact constitute two moving contact parts. The static contact assembly includes two static contacts located on both sides of the moving contact assembly. The static contact has an upper and lower opening clamping structure to form a clamping cavity for accommodating the moving contact part located at the closing position. The two moving contact parts are raised relative to the outer peripheral surface of the insulating rotating frame. The arc extinguishing chamber has an entrance, and the breaking end of the moving contact part can extend into the arc extinguishing chamber. The patent designs the static contact as an open clamping structure, and lengthens and thins the moving contact, so that the two moving contact parts protruding relative to the insulating rotating frame are clamped by the static contact from the upper and lower sides when closing the switch, and can directly extend into the arc extinguishing chamber during the process of turning to opening the switch. This design is more conducive to the arc on the moving contact being adsorbed on the arc extinguishing sheet of the arc extinguishing chamber when disconnecting, and the arc extinguishing effect is better. After experimental research, the applicant found that the above structure still has certain problems, specifically: the static contact of the above structure includes a static contact piece, the static contact piece has a wiring part for wiring, a static contact part for engaging with the moving contact part, an elastic piece is fixed to one side of the static contact part, and a clamping cavity is formed between the static contact part and the elastic piece. The clamping force of the static contact of the above open clamping structure is only provided by the elastic piece on one side. After a large number of breaking operations, the elasticity of the elastic piece is easy to decrease, resulting in a poor clamping effect of the static contact on the moving contact, which makes the current conduction unreliable when closing the switch. 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 structure of a rotary switch.
[0004] The technical solution adopted by the utility model is as follows: a contact structure of a rotary switch, comprising:
[0005] The wiring part is provided with a wiring portion for wiring;
[0006] At least one group of contact parts, one group of contact parts includes two contact plates, the two contact plates are arranged at a certain distance to form a clamping cavity, and the contact plates are electrically connected to the wiring part;
[0007] An elastic component is connected to the two contact plates and is used to form elastic forces acting in opposite directions on the two contact plates when the two contact plates are stretched apart, so that the two contact plates tend to approach each other.
[0008] The wiring part is a conductive wiring board, one end of which is a wiring part and the other end is a first connecting plate connected to the contact part. The contact part is fixed on the first connecting plate, and an electrical connection is formed between the first connecting plate and the wiring part.
[0009] The two contact plates of a group of contact parts are connected as a whole through a second connecting plate, and the contact part and the wiring part are electrically connected by connecting the second connecting plate to the first connecting plate.
[0010] The elastic component is an elastic metal strip, and the elastic component has a C-shaped structure as a whole, including two abutting ends separated by a certain distance. The elastic component bypasses the connection structure formed by the first connecting plate and the second connecting plate so that the two abutting ends abut against the outer walls of the two contact plates respectively.
[0011] The distance between the two abutting ends is smaller than the width of the connection structure formed by the first connection plate and the second connection plate.
[0012] The width of the first connecting plate is greater than that of the second connecting plate. Limiting notches are formed on both side edges of the first connecting plate, and the elastic component is clamped in the limiting notches.
[0013] It also includes a positioning component, which is used to limit the minimum distance between the two contact plates.
[0014] It also includes a positioning component, which is used to limit the minimum distance between the two contact plates;
[0015] The positioning component is a separate part, including a third connecting plate and at least one limiting block connected to the third connecting plate, the third connecting plate is connected to the second connecting plate, and the limiting block is vertically connected to the third connecting plate and arranged between the two contact plates.
[0016] The first connecting plate, the second connecting plate and the third connecting plate are connected by fasteners, and the fasteners pass through the first connecting plate, the second connecting plate and the third connecting plate in sequence to fix the three.
[0017] The contact parts are provided in at least two groups, and the at least two groups of contact parts are arranged side by side to form a clamping cavity for the moving contact to be inserted, and each group of contact parts is respectively matched with at least one group of elastic components.
[0018] The beneficial effects of the utility model are as follows: the utility model further optimizes the static contact structure with an open clamping structure in a rotary switch, and adopts more than one set of contact parts with bidirectional elastic clamping force, which is more reliable and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 It is a structural schematic diagram of Example 1;
[0021] Figure 2 It is an exploded view of Example 1;
[0022] Figure 3 It is a structural schematic diagram of the wiring part in Examples 1 and 2;
[0023] Figure 4 is a schematic structural diagram of the contact part in Example 1;
[0024] Figure 5 It is a schematic diagram of the structure of the elastic component in Examples 1 and 2;
[0025] Figure 6 It is a schematic diagram of the structure of the positioning component in Examples 1 and 2;
[0026] Figure 7 It is a structural schematic diagram of Example 2;
[0027] Figure 8 It is an exploded view of Example 2;
[0028] In the figure, the wiring part-1, the wiring part-11, the first connecting plate-12, the limiting notch-13;
[0029] Contact portion-2, contact plate-21, clamping cavity-22, second connecting plate-23;
[0030] Elastic member-3, abutting end-31;
[0031] Positioning component-4, third connecting plate-41, limiting block-42. DETAILED DESCRIPTION
[0032] 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.
[0033] 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.
[0034] Embodiment 1:
[0035] This embodiment discloses a contact structure of a rotary switch, such as Figure 1 , Figure 2 As shown, including:
[0036] The wiring part 1 is provided with a wiring portion 11 for wiring;
[0037] A group of contact parts 2, including two contact plates 21, the two contact plates 21 are arranged at a certain distance to form a clamping cavity 22, and the contact plates 21 are electrically connected to the wiring part 11;
[0038] The elastic component 3 is connected to the two contact plates 21 . The elastic component 3 is used to form elastic forces acting in opposite directions on the two contact plates 21 when the two contact plates 21 are stretched apart, so that the two contact plates 21 tend to approach each other.
[0039] Further, in this embodiment, if Figure 3 As shown, the wiring part 1 is a conductive wiring board, one end of which is a wiring part 11, and the other end is a first connecting plate 12 connected to the contact part 2. The contact part 2 is fixed on the first connecting plate 12, and an electrical connection is formed between the first connecting plate 12 and the wiring part 11.
[0040] Furthermore, in this embodiment, the two contact plates 21 of a group of contact parts are connected as a whole through the second connecting plate 23, that is, a group of contact parts is as follows: Figure 4 The integrated U-shaped plate-like structure shown is connected to the first connecting plate 12 via the second connecting plate 23 so that the contact portion and the wiring portion 1 form a conductive connection.
[0041] Furthermore, in this embodiment, the elastic component 3 is as follows Figure 5 As shown in the elastic metal strip, a group of contact parts is equipped with at least one elastic metal strip, and two are specifically used in this embodiment. The elastic component 3 is an overall C-shaped structure, including two abutting ends 31 separated by a certain distance. The elastic component 3 bypasses the connection structure formed by the first connecting plate 12 and the second connecting plate 23 so that the two abutting ends 31 respectively abut against the outer walls of the two contact plates 21, thereby forming an elastic force on the contact plate 21 toward the other contact plate 21.
[0042] Furthermore, the spacing between the two abutting ends 31 is smaller than the width of the connection structure formed by the first connecting plate 12 and the second connecting plate 23. The width of the first connecting plate 12 is larger than that of the second connecting plate 23. The two side edges of the first connecting plate 12 form a limiting notch 13, and the elastic component 3 is clamped in the limiting notch 13. Through the above-mentioned structural setting, the elastic component 3 can be assembled with the wiring part 1 and the contact part 2 into a component that is not easy to separate, which is conducive to subsequent assembly. The elastic component 3 can also adopt other common elastic parts, such as springs, metal springs, etc., and is set between the two contact plates 21 and the switch housing.
[0043] like Figure 1-2 As shown, this embodiment further includes a positioning component 4, which is used to limit the minimum spacing between the two contact plates 21. The positioning component 4 can ensure the minimum spacing between the two contact plates 21, that is, ensure that the moving contact can smoothly rotate between the two contact plates 21 in the rotary switch.
[0044] The positioning member 4 of this embodiment is a separate part, such as Figure 6 As shown, it includes a third connecting plate 41 and at least one limit block 42 connected to the third connecting plate 41, the third connecting plate 41 is connected to the second connecting plate 23, the limit block 42 is vertically connected to the third connecting plate 41 and is arranged between the two contact plates 21, and the minimum distance between the two contact plates 21 is the width of the limit block 42.
[0045] The number of limit blocks 42 that cooperate with a group of contact parts is at least one, and can be configured according to the width of the contact plate 21. When the width of the contact plate 21 is small, one limit block 42 can be set. When the width of the contact plate 21 is large, at least two limit blocks 42 can be set to ensure that the two contact plates 21 are subjected to balanced force.
[0046] Specifically, the first connecting plate 12, the second connecting plate 23 and the third connecting plate 41 of this embodiment are connected by fasteners. Specifically, fasteners such as rivets and screws can be used to pass through the first connecting plate 12, the second connecting plate 23 and the third connecting plate 41 in sequence to fix the three.
[0047] The positioning component 4 can also be arranged as a contact portion, that is, connected with the contact plate 21 and the second connecting plate 23 as a whole.
[0048] Embodiment 2:
[0049] This embodiment discloses a contact structure of a rotary switch, such as Figure 7As shown, the structure and related coordination of the wiring part 1, the contact part 2 and the elastic component 3 of this embodiment are basically the same as those of the embodiment 1, the main difference is that the contact part 2 is arranged in at least two groups, and at least two groups of contact parts 2 are arranged side by side to form a clamping cavity for the moving contact to be inserted, and each group of contact parts 2 is respectively matched with at least one group of elastic components 3 so that the abutting elastic force of the two contact plates 21 of each group of contact parts 2 is provided separately. The attached figure presents a contact structure with two groups of contact parts 2, and each group of contact parts 2 is matched with an elastic component 3.
[0050] In this embodiment, the contact parts 2 are arranged in at least two groups, so that the contact parts 2 of at least two groups of the split body will not interfere with each other. When the abutting elastic force provided by the elastic component 3 of one group is insufficient, the corresponding contact part 2 may not form a good conductive contact with the moving contact, and the other contact parts 2 can still maintain good contact, the overall life can be increased, and the requirements for processing accuracy are also reduced. In addition, the contact parts 2 of at least two groups of the split body are arranged side by side, which can reduce the temperature rise of the switch.
[0051] 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 structure of a rotary switch, characterized in that: include: A wiring part (1) is provided with a wiring portion (11) for wiring; At least one group of contact parts (2), wherein the group of contact parts (2) comprises two contact plates (21), the two contact plates (21) are arranged at a certain distance to form a clamping cavity (22), and an electrical connection is formed between the contact plates (21) and the wiring part (11); An elastic component (3), the elastic component (3) being connected to the two contact plates (21), and the elastic component (3) being used to respectively generate elastic forces acting in opposite directions on the two contact plates (21) when the two contact plates (21) are stretched apart, so that the two contact plates (21) tend to approach each other.
2. The contact structure of the rotary switch according to claim 1, characterized in that: The wiring part (1) is a conductive wiring board, one end of which is a wiring part (11) and the other end is a first connecting plate (12) connected to the contact part (2). The contact part (2) is fixed on the first connecting plate (12) and an electrical connection is formed between the first connecting plate (12) and the wiring part (11).
3. The contact structure of the rotary switch according to claim 2, characterized in that: Two contact plates (21) of a group of contact parts are connected as one body via a second connecting plate (23), and the second connecting plate (23) is connected to the first connecting plate (12) so that the contact part and the wiring part (1) are electrically connected.
4. The contact structure of the rotary switch according to claim 3, characterized in that: The elastic component (3) is an elastic metal strip. The elastic component (3) is an overall C-shaped structure and comprises two abutting end portions (31) spaced a certain distance apart. The elastic component (3) bypasses the connection structure formed by the first connecting plate (12) and the second connecting plate (23) so that the two abutting end portions (31) respectively abut against the outer walls of the two contact plates (21).
5. The contact structure of the rotary switch according to claim 4, characterized in that: The distance between the two abutting end portions (31) is smaller than the width of the connection structure formed by the first connection plate (12) and the second connection plate (23).
6. The contact structure of the rotary switch according to claim 4, characterized in that: The width of the first connecting plate (12) is greater than that of the second connecting plate (23); two side edges of the first connecting plate (12) form limiting notches (13); and the elastic component (3) is clamped in the limiting notches (13).
7. The contact structure of the rotary switch according to claim 1, characterized in that: It also comprises a positioning component (4), wherein the positioning component (4) is used to limit the minimum spacing between the two contact plates (21).
8. The contact structure of the rotary switch according to claim 3, characterized in that: It also includes a positioning component (4), wherein the positioning component (4) is used to limit the minimum spacing between the two contact plates (21); The positioning component (4) is a separate part, comprising a third connecting plate (41) and at least one limiting block (42) connected to the third connecting plate (41); the third connecting plate (41) is connected to the second connecting plate (23); the limiting block (42) is vertically connected to the third connecting plate (41) and is arranged between the two contact plates (21).
9. The contact structure of the rotary switch according to claim 8, characterized in that: The first connecting plate (12), the second connecting plate (23) and the third connecting plate (41) are connected by fasteners, and the fasteners pass through the first connecting plate (12), the second connecting plate (23) and the third connecting plate (41) in sequence to fix the three.
10. The contact structure of a rotary switch according to any one of claims 1 to 9, characterized in that: The contact parts (2) are provided in at least two groups, and the at least two groups of contact parts (2) are arranged side by side to form a clamping cavity for the moving contact to be inserted, and each group of contact parts (2) is respectively matched with at least one group of elastic components (3).