Switch static contact structure
By setting the conductive connection between the conductive support sheet and the static contact frame in the switch static contact structure and the static contact surface facing the front contact design, the problem of poor conductive contact in the prior art is solved, and the conductive performance and stability of the switch are improved.
Patent Information
- Application Number
- CN202421155261.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing static contact structure of the switch leads to poor conductive contact, resulting in poor conductivity and insufficient use stability. It is mainly due to the asymmetric contact position between the static contact and the moving contact and the unperpendicular thrust, which is prone to poor contact and force division. question.
A switch static contact structure is designed, in which the conductive support sheet is electrically connected to the crimping frame, the static contact surface is set as a plane, and the moving contact points on the switch swaying plate is avoided to prevent poor contact, and pass through the semicircular end of the conductive support sheet. and crack-resisting grooves improve contact stability and reduce resistance using silver contacts and copper wire frames.
It improves the conductivity and stability of the switch, ensures the positive contact between the dynamic contact and the static contact, increases the contact pressure, reduces the impact of part error on the contact, and improves the overall reliability of use.
Smart Images
Figure CN222338090U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of switch structures, in particular to a switch static contact structure. Background Art
[0002] At present, the wall switch is provided with a moving contact and a stationary contact. The moving contact is arranged on the switch swing piece. The lever of the wall switch drives the switch swing piece to swing through the compression spring, and the moving contact swings around the fulcrum of the switch swing piece. When the moving contact contacts the stationary contact, the connection is conductive. When the moving contact is separated from the stationary contact, the connection is disconnected. The stationary contact of some switches in the prior art is arranged on a conductive support sheet. The conductive support sheet is conductively connected to the wire pressing frame. The wire pressing frame is screwed with a wire pressing screw. The end of the output wire is inserted into the wire pressing frame. The wire pressing screw presses the output wire. The end of the outgoing wire is pressed against the inner wall of the wire pressing frame, and the input wire (such as the live wire) is conductively connected to the switch swing piece. The allowable swing amplitude of the switch swing piece is small, so the moving contact moves up and down approximately in a straight line, and the middle line of the swing stroke of the switch swing piece is roughly located in the horizontal plane. In order to facilitate positioning and wiring, the wire pressing frame is usually extended in the front-to-back direction, that is, the wire pressing frame is not inclined, and the conductive support sheet is also horizontally arranged, that is, the conductive support sheet is roughly parallel to the swing middle line of the switch swing piece. Since the moving contact moves up and down in a nearly straight line, even if the axis of the static contact is along the up and down direction, the moving contact and the static contact can achieve conductive connection by relatively inclined contact. However, in fact, when the switch swing piece swings to make the moving contact contact the static contact, the moving contact and the static contact are not coaxial. Specifically, the axis of the moving contact forms a large angle with the axis of the static contact, so that the edge of the moving contact contacts the static contact, rather than the center of the moving contact contacts the center of the static contact. In simple terms, the static contact is not facing the swing tangent direction of the moving contact. On the one hand, because the contact position of the static contact and the moving contact is too close to the edge, if there is an error in the size of the parts, it is easy to cause poor contact. On the other hand, because the thrust of the moving contact on the static contact is not perpendicular to the contact surface of the static contact, a component force along the contact surface of the static contact is generated. Relatively speaking, the mutual contact pressure between the moving contact and the static contact is reduced, which easily leads to poor conductive contact and poor conductive performance of the switch. Therefore, it is necessary to improve the static contact structure of the prior art. Summary of the invention
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a switch static contact structure, which is beneficial to improving the conductivity and use stability of the switch.
[0004] The purpose of the utility model is achieved through the following technical solutions.
[0005] The utility model discloses a switch static contact structure, comprising a wire pressing frame, the wire pressing frame is fixedly connected with a conductive support sheet, the wire pressing frame is conductively connected to the conductive support sheet, a static contact is arranged on the conductive support sheet, a static contact surface is formed on the static contact, the static contact surface is set as a plane, and the static contact surface and the extension direction of the wire pressing frame form an angle for making the static contact surface directly contact the moving contact on the switch swing sheet.
[0006] Preferably, one end of the conductive support sheet is integrated with the wire pressing frame.
[0007] Preferably, the conductive support sheet is parallel to the static contact surface.
[0008] Preferably, the other end corresponding to the conductive support sheet is set as a semicircular end.
[0009] Preferably, the semicircular end is arranged concentrically with the static contact.
[0010] Preferably, crack-stop grooves are respectively formed between the left and right sides of the conductive support sheet and the wire pressing frame.
[0011] Preferably, the wire pressing frame comprises a conductive contact plate for contacting the end of the wire, and the conductive contact plate is integrally connected with the conductive support sheet.
[0012] Preferably, the static contacts are silver contacts.
[0013] Preferably, the wire pressing frame is a copper wire pressing frame.
[0014] Preferably, the static contact is formed with a positioning column portion, and the positioning column portion is adapted to pass through the conductive support sheet.
[0015] Compared with the prior art, the utility model has the following beneficial effects: a wire pressing frame is fixedly connected with a conductive support sheet, the wire pressing frame and the conductive support sheet are conductively connected, a static contact is provided on the conductive support sheet, a static contact surface is formed on the static contact, the static contact surface is set as a plane, and the extension direction of the static contact surface and the wire pressing frame forms an angle for the static contact surface to directly contact the moving contact on the switch swing sheet, thereby avoiding the situation that the moving contact and the static contact have poor contact, which is beneficial to improving the conductive performance and the stability of use of the switch. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic cross-sectional structure diagram of the static contact structure of the switch of the utility model when viewed from the right.
[0017] Figure 2 It is a three-dimensional structural schematic diagram of the static contact structure of the switch of the utility model.
[0018] Figure 3It is a three-dimensional structural schematic diagram of the combination of the wire pressing frame and the conductive support sheet of the utility model.
[0019] Figure 4 It is a schematic cross-sectional structure diagram of the combination of the wire pressing frame and the conductive support sheet of the utility model.
[0020] Explanation of reference numerals: wire pressing frame 1; conductive support sheet 11; static contact 111; static contact surface 1111; positioning column 1112; semicircular end 112; crack-stop groove 101; conductive contact plate 12; switch swing sheet 2; moving contact 21; insert sheet 201; wire pressing screw 3; wire end 99. DETAILED DESCRIPTION
[0021] The utility model is further described below in conjunction with the accompanying drawings.
[0022] The switch static contact structure of the utility model is as follows: Figures 1 to 3 As shown, it includes a wire pressing frame 1, the wire pressing frame 1 is fixedly connected to a conductive support sheet 11, the wire pressing frame 1 is conductively connected to the conductive support sheet 11, the wire pressing frame 1 and the conductive support sheet 11 can be fixedly connected by welding or riveting, a static contact 111 is provided on the conductive support sheet 11, a static contact surface 1111 is formed on the static contact 111, and the static contact surface 1111 is set to a plane; as shown Figure 4 As shown, the extending direction of the static contact surface 1111 and the wire pressing frame 1 forms an angle (i.e., Figure 4 angular dimension "X" in the figure).
[0023] In detail, Figure 1 and Figure 2 As shown, the switch pendulum 2 realizes the switch switching action by swinging up and down. The rear end of the switch pendulum 2 is the swing fulcrum end. The front part of the switch pendulum 2 is formed with an insert 201, and the insert 201 is inserted into the rear end of the compression spring. The lever of the wall switch drives the switch pendulum 2 to swing through the compression spring. Specifically, the wall switch is formed with a groove structure, and the rear end of the switch pendulum 2 is located in the above-mentioned groove, so that when the compression spring moves the switch pendulum 2, the rear end of the switch pendulum 2 cannot be obviously displaced up and down, so that the front end of the switch pendulum 2 can swing up and down. The switch pendulum 2 is similar to swinging around the fixed axis of the rear end of the switch pendulum 2. Since the structure and function of the switch pendulum 2 are existing technologies, they are not described here. Figure 1 As shown, due to the formation of the above-mentioned angle dimension "X", the wire pressing frame 1 can maintain a non-inclined arrangement, that is, the extension direction of the wire pressing frame 1 can be along the front-back direction. For example, Figure 2 The cross-sectional shape of the wire pressing frame 1 is roughly rectangular, and the cross-sectional shape of the wire pressing frame 1 is perpendicular to the extension direction of the wire pressing frame 1. The advantage of such a setting is that Figure 1As shown, the wire end 99 (with the rubber peeled off) can be inserted into the wire pressing frame 1 from the back to the front, and the wire pressing screw 3 is approximately perpendicular to the wire end 99, so as to avoid the screwdriver from being in the front-to-back direction and the screwdriver handle from interfering with the wall. Therefore, the extension direction of the wire pressing frame in the prior art is usually in the front-to-back direction (or approximately), so the static contact surface 1111 forms a certain angle with the front-to-back direction. Figure 1 As shown, when the switch swing piece 2 swings, the moving contact 21 moves roughly along a circular arc. When the moving contact 21 contacts the static contact surface 1111, the swing tangent of the moving contact 21 is not perpendicular to the horizontal plane. The static contact surface 1111 is directly (i.e. facing) in contact with the moving contact 21. That is to say, the static contact surface 1111 is perpendicular to the swing tangent direction of the moving contact 21. Therefore, the thrust of the moving contact 21 on the static contact surface 1111 (the thrust is formed by the elastic restoring force of the compression spring) is perpendicular to the static contact surface 1111. The mutual contact pressure between the moving contact 21 and the static contact surface 1111 is relatively large (compared with the prior art), thereby avoiding poor conductive contact and improving the conductive performance of the switch. Figure 1 As shown, since the static contact surface 1111 is directly in contact with the moving contact 21, that is, the moving contact 21 and the static contact 111 are in coaxial contact, the center of the moving contact 21 can be made to contact the static contact surface 1111; since there are certain degrees of errors in the parts of the wall switch, in actual applications, it is inevitable that the moving contact 21 and the static contact 111 will be in eccentric contact, and since the center of the moving contact 21 is designed to contact the static contact surface 1111, in actual use, when the moving contact 21 contacts the static contact 111, it is avoided that the moving contact 21 easily exceeds the range of the static contact surface 1111, so the static contact structure of the switch of the utility model is conducive to improving the stability of the switch.
[0024] Furthermore, if Figure 3 As shown, one end of the conductive support sheet 11 is integrated with the wire pressing frame 1, which is beneficial to the good and reliable conductive connection performance between the conductive support sheet 11 and the wire pressing frame 1, and is beneficial to simplifying the assembly process of the wall switch. The combination of the conductive support sheet 11 and the wire pressing frame 1 can be manufactured by sheet metal processing.
[0025] Furthermore, if Figure 1 As shown, the conductive support sheet 11 is parallel to the static contact surface 1111. In other words, the angle between the conductive support sheet 11 and the extension direction of the wire pressing frame 1 is an angle dimension "X", so that the static contact 111 can use existing general parts, which is conducive to reducing the difficulty of making the static contact 111, that is, the design in which the static contact surface 1111 is perpendicular to the central axis of the static contact 111 can be maintained.
[0026] Furthermore, if Figure 3As shown, the other end corresponding to the conductive support sheet 11 is set as a semicircular end 112, so as to avoid the end of the conductive support sheet 11 forming a sharp corner and causing irritation. In addition, since the original sharp corner does not participate in conduction, cutting off the original sharp corner does not affect conduction, and the material of the original sharp corner can also be recycled.
[0027] Furthermore, if Figure 3 As shown, the semicircular end 112 is arranged concentrically with the static contact 111 , thereby avoiding the situation where unbalanced force occurs due to the static contact 111 being biased to one side of the conductive support sheet 11 .
[0028] Furthermore, if Figure 3 As shown, crack-stop grooves 101 are formed between the left and right sides of the conductive support sheet 11 and the wire pressing frame 1 , respectively. The crack-stop grooves 101 are pre-processed before bending. By designing the crack-stop grooves 101 , cracks can be avoided when the conductive support sheet 11 is bent.
[0029] Furthermore, if Figure 1 As shown, the wire pressing frame 1 includes a conductive contact plate 12 for contacting the end 99 of the wire. Figure 3 As shown, the conductive contact plate 12 is connected to the conductive support plate 11 as a whole. Specifically, as shown in Figure 1 As shown, the wire pressing screw 3 is perpendicular to the conductive contact plate 12, and the wire pressing screw 3 presses the wire end 99 tightly against the inner side of the conductive contact plate 12. Since the conductive contact plate 12 is integrally connected to the conductive support plate 11, it is beneficial to reduce the line length from the wire end 99 to the static contact 111, thereby helping to reduce resistance.
[0030] Furthermore, the static contact 111 is set as a silver contact, that is, the static contact surface 1111 is silver-plated, which is beneficial to improve the conductivity of the switch, and the moving contact 21 is also a silver contact. Figure 1 As shown, the end surface of the moving contact 21 for contacting the stationary contact surface 1111 is set to be a convex spherical surface, which is beneficial to increase the contact pressure between the stationary contact surface 1111 and the moving contact 21.
[0031] Furthermore, the wire pressing frame 1 is a copper wire pressing frame, that is, the wire pressing frame 1 is made by bending a copper plate. Since the copper plate has good ductility, it is convenient for the assembly of the wire pressing frame 1 and the conductive support sheet 11 to be easily bent and manufactured.
[0032] Furthermore, if Figure 4As shown, the static contact 111 is formed with a positioning column portion 1112, and the positioning column portion 1112 and the static contact surface 1111 are respectively located at the two ends of the static contact 111, and the positioning column portion 1112 is adapted to pass through the conductive support sheet 11, that is, the conductive support sheet 11 is formed with a circular through hole, and the positioning column portion 1112 is inserted into the above-mentioned circular through hole, and the positioning column portion 1112 is fixedly connected to the conductive support sheet 11 by a riveting process.
[0033] When designing, Figure 1 As shown, the position where the static contact 111 blocks the switch pendulum 2 is determined according to the actual required swing amplitude of the switch pendulum 2. Since the axis of the moving contact 21 is perpendicular to the switch pendulum 2, the static contact surface 1111 is set parallel to the switch pendulum 2 (when the moving contact 21 contacts the static contact surface 1111). Therefore, the above-mentioned angle dimension "X" is equal to the angle between the switch pendulum 2 and the front-to-back direction. Since the moving contact 21 and the static contact 111 are in coaxial contact, the design value of the angle dimension "X" is determined, and the assembly of the wire pressing frame 1, the conductive support sheet 11 and the static contact 111 is manufactured according to the design value of the angle dimension "X".
Claims
1. A switch static contact structure, characterized in that: The invention comprises a wire pressing frame (1), the wire pressing frame (1) being fixedly connected to a conductive support sheet (11), the wire pressing frame (1) being conductively connected to the conductive support sheet (11), a static contact (111) being provided on the conductive support sheet (11), a static contact surface (1111) being formed on the static contact (111), the static contact surface (1111) being set as a plane, and an angle formed between the static contact surface (1111) and the extension direction of the wire pressing frame (1) for causing the static contact surface (1111) to directly contact a movable contact (21) on a switch swing sheet (2).
2. The switch static contact structure according to claim 1, characterized in that: One end of the conductive support sheet (11) is integrally arranged with the wire pressing frame (1).
3. The switch static contact structure according to claim 2, characterized in that: The conductive support sheet (11) is parallel to the static contact surface (1111).
4. The switch static contact structure according to claim 3, characterized in that: The other corresponding end of the conductive support sheet (11) is configured as a semicircular end (112).
5. The switch static contact structure according to claim 4, characterized in that: The semicircular end (112) is arranged concentrically with the static contact point (111).
6. The switch static contact structure according to claim 2, characterized in that: Crack-stop grooves (101) are respectively formed between the left and right sides of the conductive support sheet (11) and the wire pressing frame (1).
7. The switch static contact structure according to claim 2, characterized in that: The wire pressing frame (1) comprises a conductive contact plate (12) for contacting an end portion (99) of an electric wire, and the conductive contact plate (12) is integrally connected to the conductive support plate (11).
8. The switch static contact structure according to claim 1, characterized in that: The static contact (111) is set as a silver contact.
9. The switch static contact structure according to claim 3, characterized in that: The wire pressing frame (1) is configured as a copper wire pressing frame.
10. The switch static contact structure according to claim 1, characterized in that: The static contact (111) is formed with a positioning column portion (1112), and the positioning column portion (1112) is adapted to pass through the conductive support sheet (11).