A contact assembly with self-cleaning function, a switching mechanism and a switch

Abstract

The utility model provides a kind of contact assembly with self-cleaning function, switch mechanism and switch, wherein contact assembly includes: push block, including top surface, bottom surface and side wall, the inside of top surface and bottom surface is respectively provided with upper arc-shaped recess and lower arc-shaped recess along first direction, the outside of top surface and bottom surface is respectively provided with top surface protruding portion and bottom surface protruding portion along second direction, first direction and second direction are not parallel to each other;Moving contact, including the contact bridge and two moving contacts being set at the two ends of contact bridge and the outside of push block towards, which are matched with upper arc-shaped recess and lower arc-shaped recess;Static contact, located on the outside of push block, including the static contact facing moving contact;Limiting rod, is fixed on the side wall through through hole horizontally;And spring, is sleeved on limiting rod.The contact assembly in the utility model can realize the self-cleaning of switch mechanism by the surface friction between moving contact and static contact.

Description

Technical Field

[0001] This utility model relates to the field of circuit switch technology, specifically to a contact component, switch mechanism, and switch with self-cleaning function. Background Technology

[0002] The contact component is the core component of a circuit switch. The switch uses cam movement to adjust and control the operation of the contact component, thereby switching the circuit between connected and disconnected states. The cleanliness of the contact component directly affects the electrical conductivity of the device. Over time, dust, oil, oxides, and other impurities gradually accumulate on the contacts of the contact component, leading to poor contact and affecting the normal function of the electrical appliance, and may even pose safety hazards. Therefore, keeping the contact component clean is crucial.

[0003] Therefore, during current use, the contact components are usually cleaned manually and periodically using precision electrical cleaners. These precision electrical cleaners can penetrate deep into the surface of the contact heads in the contact components, dissolving and removing contaminants such as dust and oil. At the same time, high-quality precision electrical cleaners have good insulation properties and will not cause short circuits even when used under power, ensuring the safety of the cleaning process.

[0004] Precision electrical cleaners have good cleaning effects, but they still require regular cleaning by professionals. In addition, the entire circuit must be disconnected during the cleaning process, which is time-consuming, labor-intensive, and poses certain safety hazards. Utility Model Content

[0005] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a contact component, a switching mechanism, and a switch with a self-cleaning function.

[0006] This utility model provides a contact component with a self-cleaning function, disposed on a cover body. The cover body includes a top cover, a bottom cover, and a side cover. The top cover and bottom cover are respectively provided with a top cover groove and a bottom cover groove for cooperating with the contact component. It features a push block, including a top surface, a bottom surface, and a side wall. The inner sides of the top surface and bottom surface are respectively provided with an upper arc-shaped groove and a lower arc-shaped groove along a first direction. The outer sides of the top surface and bottom surface are respectively provided with a top surface protrusion and a bottom surface protrusion along a second direction. The top surface protrusion mates with the top cover groove, and the bottom surface protrusion mates with the bottom cover groove. The first direction and the second direction are not parallel to each other. A moving contact includes a push block that engages with the upper arc-shaped groove and the lower arc-shaped groove. The device includes a contact bridge with a groove and two moving contacts located at both ends of the contact bridge and facing the outside of the push block. The contact bridge is positioned between the top and bottom surfaces and abuts against the inner sides of the top and bottom surfaces. A through hole is provided at the center of the contact bridge. A stationary contact is located outside the push block and includes a stationary contact facing the moving contact. As the moving contact moves, the moving contact contacts or separates from the stationary contact. A limiting rod is horizontally fixed to the side wall through the through hole. A spring is sleeved on the limiting rod, with one end abutting against the side cover and the other end abutting against the contact bridge. The spring applies a pushing force to the push block and the moving contact by cooperating with the side cover, thereby causing the stationary contact to contact the moving contact.

[0007] The contact assembly with self-cleaning function provided by this utility model may also have the following feature: the included angle between the first direction and the second direction is 3°~5°.

[0008] The self-cleaning contact assembly provided by this utility model may also have the following features: the side surface of the stationary contact where the stationary contact point is provided is called the stationary contact point plane, and the side wall includes an outer plane parallel to the stationary contact point plane and an inner plane forming a certain angle with the stationary contact point plane.

[0009] The contact assembly with self-cleaning function provided by this utility model may also have the following feature: the angle between the inner plane and the top surface is an acute angle, and the angle between the inner plane and the bottom surface is an obtuse angle.

[0010] The self-cleaning contact assembly provided by this utility model may also have the following feature: the outer diameter of the limiting rod is adapted to the inner diameter of the spring, and is used to limit the spring.

[0011] The self-cleaning contact assembly provided by this utility model may also have the following feature: the edge of the contact bridge near the top and bottom surfaces has a flange, which abuts against the top and bottom surfaces to limit the movement of the moving contact.

[0012] This utility model also provides a switching mechanism for connecting or disconnecting a circuit under the action of a drive rod, characterized by: a cover; a cam rotatably mounted on the cover for rotating under the drive rod; and a contact assembly with a self-cleaning function, wherein the outer side of the push block abuts against the cam, and the inner side abuts against the inner wall of the cover through a spring, thereby driving the moving contact to move.

[0013] The switching mechanism provided by this utility model may also have the following features: the cam has an arc portion and a groove portion. When the arc portion abuts against the outer side of the push block, the arc portion applies an external force to the push block, compressing the spring and causing the push block to move away from the stationary contact, thus separating the moving contact from the stationary contact. When the groove portion abuts against the outer side of the push block, the groove portion does not apply an external force to the push block, the spring returns to its original position, and the push block moves towards the stationary contact, thus bringing the moving contact into contact with the stationary contact.

[0014] This utility model also provides a switch, characterized by comprising: at least one switching mechanism for connecting or disconnecting a circuit; and a drive rod connected to the switching mechanism.

[0015] The switch provided by this utility model may also have the following feature: it further includes a control knob connected to a drive rod for controlling the rotation of the drive rod.

[0016] Functions and effects of utility models

[0017] According to the present invention, a contact component, switch mechanism, and switch with self-cleaning function are provided on the outer side of the top surface of the push block, which is provided to cooperate with the top cover groove, and a bottom surface protrusion is provided on the outer side of the bottom surface of the push block, which is provided to cooperate with the bottom cover groove. This allows the push block to move along the second direction when it is active. At the same time, an upper arc-shaped groove and a lower arc-shaped groove are provided on the inner side of the top and bottom surfaces respectively along the first direction. Since the moving contact and the push block are movably connected, by controlling the angle between the second direction and the first direction, the moving contact and the stationary contact can rub against each other when they come into contact, removing dust and other particles from the contact surface, thereby achieving a point-contact self-cleaning effect. Attached Figure Description

[0018] Figure 1 This is a perspective view of the switch in an embodiment of this utility model.

[0019] Figure 2 This is a perspective view of the switching mechanism in an embodiment of this utility model.

[0020] Figure 3 This is a top cross-sectional view of the switching mechanism in an embodiment of this utility model.

[0021] Figure 4This is a schematic diagram of the bottom cover structure in an embodiment of this utility model.

[0022] Figure 5 This is a perspective view of the contact component in an embodiment of this utility model.

[0023] Figure 6 This is a side view of the contact component in an embodiment of this utility model.

[0024] Figure 7 This is a top view of the contact component in an embodiment of this utility model.

[0025] Figure 8 This is a perspective view of the push block in an embodiment of this utility model.

[0026] Figure 9 This is a side view of the push block in an embodiment of this utility model.

[0027] Figure 10 This is a perspective view of the contact bridge in an embodiment of this utility model.

[0028] Explanation of icon numbers

[0029] 100-Contact component, 10-Push block, 11-Top surface, 12-Bottom surface, 13-Side wall, 14-Upper arc groove, 15-Lower arc groove, 16-Top surface protrusion, 17-Bottom surface protrusion, 18-Side wall protrusion, 19-Outer plane, 20-Inner plane, 30-Moving contact, 31-Contact bridge, 32-Moving contact, 33-Through hole, 34-Flange, 40-Stationary contact, 41-Stationary contact, 42-Stationary contact plane, 50-Limit rod, 60-Spring, 200-Switch mechanism, 70-Cover, 71-Top cover, 72-Bottom cover, 73-Side cover, 74-Bottom cover slot, 75-Connecting hole, 80-Cam, 81-Arc portion, 82-Groove portion, 300-Switch, 90-Switch body, 91-Control knob. Detailed Implementation

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the contact component, switching mechanism and switch of this utility model with self-cleaning function.

[0032] Figure 1 This is a perspective view of the switch in an embodiment of this utility model.

[0033] like Figure 1 As shown, this embodiment discloses a switch 300, which includes three switching mechanisms 200, a drive rod (not shown in the figure), a control knob 91, and a switch body 90.

[0034] The drive rod is connected to the switch mechanism 200.

[0035] The control knob is connected to the drive lever and is used to control the rotation of the drive lever.

[0036] Figure 2 This is a perspective view of the switching mechanism in an embodiment of this utility model. Figure 3 This is a top cross-sectional view of the switching mechanism in an embodiment of this utility model. Figure 4 This is a schematic diagram of the bottom cover structure in an embodiment of this utility model.

[0037] like Figures 2-4 As shown, the switching mechanism 200 is used to connect or disconnect the circuit under the action of the drive rod, and includes a cover 70, a cam 80 and two centrally symmetrically arranged contact components 100 with self-cleaning function.

[0038] The cover 70 includes a top cover 71, a bottom cover 72, and a side cover 73. The top cover 71 is provided with two centrally symmetrical top cover slots for cooperating with two centrally symmetrically arranged contact components 100. The bottom cover 72 is provided with two centrally symmetrical bottom cover slots 74 for cooperating with two centrally symmetrically arranged contact components 100. The top cover 71 and the bottom cover 72 are also provided with corresponding connecting holes 75 for connecting rods (not shown in the figure) to pass through, so that the three switching mechanisms 200 are fixed to the switch body 90 by the connecting rods.

[0039] The cam 80 is rotatably mounted on the cover 70 and is used to rotate under the drive of the drive rod.

[0040] The cam 80 has an arc portion 81 and a groove portion 82. When the arc portion 81 abuts against the outer side of the contact assembly 100, the arc portion 81 applies an external force to the contact assembly 100, causing the contact assembly 100 to disconnect. When the groove portion 82 abuts against the outer side of the contact assembly 100, the groove portion 82 does not apply an external force to the contact assembly 100, causing the contact assembly 100 to connect.

[0041] Figure 5 This is a perspective view of the contact component in an embodiment of this utility model. Figure 6 This is a side view of the contact component in an embodiment of this utility model. Figure 7 This is a top view of the contact component in an embodiment of this utility model. Figure 8 This is a perspective view of the push block in an embodiment of this utility model. Figure 9 This is a side view of the push block in an embodiment of this utility model. Figure 10 This is a perspective view of the contact bridge in an embodiment of this utility model.

[0042] like Figures 5-10 As shown, the contact assembly 100 includes a push block 10, a moving contact 30, a stationary contact 40, a limit rod 50, and a spring 60.

[0043] The push block 10 includes a top surface 11, a bottom surface 12, and a side wall 13. The inner sides of the top surface 11 and the bottom surface 12 are respectively provided with an upper arc-shaped groove 14 and a lower arc-shaped groove 15 along a first direction. The outer sides of the top surface 11 and the bottom surface 12 are respectively provided with a top surface protrusion 16 and a bottom surface protrusion 17 along a second direction. The top surface protrusion 16 mates with the top cover groove, and the bottom surface protrusion 17 mates with the bottom cover groove 74. The first direction and the second direction are not parallel to each other, and there is a 4° angle between them. Since the two contact components 100 in the switching mechanism 200 are centrally symmetrically arranged, the top surface protrusions 16 of the two contact components 100 are parallel to each other, and the bottom surface protrusions 17 of the two contact components 100 are also parallel to each other.

[0044] The outer side of the side wall 13 of the push block 10 is also provided with a side wall protrusion 18 for abutting against the cam 80.

[0045] The moving contact 30 includes a contact bridge 31 and two moving contacts 32.

[0046] The contact bridge 31 is matched with the upper arc-shaped groove 14 and the lower arc-shaped groove 15, and the two moving contacts 32 are respectively located at both ends of the contact bridge 31 and facing the outside of the push block 10.

[0047] A contact bridge 31 is disposed between the top surface 11 and the bottom surface 12, abutting against the inner sides of the top surface 11 and the bottom surface 12. A through hole 33 is provided at the center of the contact bridge 31. The contact bridge 31 has a flange 34 near the edge of the top surface 11 and the bottom surface 12, which abuts against the top surface 11 and the bottom surface 12 and is used to limit the movement of the moving contact 30.

[0048] The stationary contact 40 is located outside the push block 10 and is connected to the external circuit. It includes a stationary contact 41 facing the moving contact 32. As the moving contact 30 moves, the moving contact 32 comes into contact with or separates from the stationary contact 41, thereby connecting or disconnecting the external circuit.

[0049] The side surface of the stationary contact 40 where the stationary contact 41 is located is called the stationary contact plane 42. The side wall 13 includes an outer plane 19 parallel to the stationary contact plane 42 and an inner plane 20 forming a certain angle with the stationary contact plane 42.

[0050] Specifically, the angle between the inner plane 20 and the top plane 11 is 75°, and the angle α between the inner plane 20 and the bottom plane 12 is 105°.

[0051] The limiting rod 50 is horizontally fixed to the side wall 13 through the through hole 33. The outer diameter of the limiting rod 50 is matched with the inner diameter of the spring 60, and is used to limit the spring 60.

[0052] Spring 60 is sleeved on limit rod 50. One end of spring 60 abuts against side cover 73 and the other end abuts against contact bridge 31. Spring 60 applies a pushing force to push block 10 and moving contact 30 by cooperating with side cover 73, thereby making stationary contact 40 contact moving contact 30.

[0053] Usage process:

[0054] When the user switches the state of one of the contact components 100 from on to off using the control knob 91, the arc portion 81 of the cam 80 abuts against the side wall protrusion 18, and the arc portion 81 applies an external force to the push block 10, compressing the spring 60, causing the push block 10 to move away from the stationary contact 40, and the moving contact 30 separates from the stationary contact 40. At this time, the external circuit connected to the stationary contact 40 in the contact component 100 is disconnected.

[0055] When the user switches the state of one of the contact components 100 from off to on using the control knob 91, the groove 82 of the cam 80 abuts against the side wall protrusion 18. The groove 82 does not apply external force to the push block 10, and the spring 60 returns to its original position, causing the push block 10 to move toward the stationary contact 40. The moving contact 30 contacts the stationary contact 40, and at this time, the external circuit connected to the stationary contact 40 in the contact component 100 is connected.

[0056] In this embodiment, by providing only one recessed portion 82, at most one of the two centrally symmetrical contact components 100 can be connected at the same time. When the pushing blocks 10 of both contact components 100 abut against the arc portion 81, both contact components 100 are in a state of being disconnected from the external circuit.

[0057] The role and effect of the embodiments

[0058] According to the present invention, a contact component, switch mechanism, and switch with self-cleaning function are provided on the outer side of the top surface of the push block, which is provided to cooperate with the top cover groove, and a bottom surface protrusion is provided on the outer side of the bottom surface of the push block, which is provided to cooperate with the bottom cover groove. This allows the push block to move along the second direction when it is active. At the same time, an upper arc-shaped groove and a lower arc-shaped groove are provided on the inner side of the top and bottom surfaces respectively along the first direction. Since the moving contact and the push block are movably connected, by controlling the angle between the second direction and the first direction, the moving contact and the stationary contact can rub against each other when they come into contact, removing dust and other particles from the contact surface, thereby achieving a point-contact self-cleaning effect.

[0059] This invention sets the inner plane of the push block sidewall that abuts against the contact bridge to form a plane that forms a certain angle with the stationary contact plane, so that the friction that occurs on the surface when the moving contact and the stationary contact come into contact changes from point contact to surface friction, thus covering a wider range and significantly improving the cleaning effect.

[0060] This invention achieves spring limiting by setting a limiting rod on the side wall of the push block, thereby preventing the spring from shifting due to twisting when the push block switches its contact surface with the cam.

[0061] This invention, by setting a flange on the contact bridge, enables the contact bridge to abut against the side of the push block, thereby limiting its position and preventing the contact bridge from shifting or falling off.

[0062] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A contact component with a self-cleaning function, disposed on a cover body, the cover body comprising a top cover, a bottom cover, and side covers, wherein the top cover and the bottom cover are respectively provided with a top cover groove and a bottom cover groove for cooperating with the contact component, characterized in that, include: The push block includes a top surface, a bottom surface, and side walls. The inner sides of the top surface and the bottom surface are respectively provided with an upper arc-shaped groove and a lower arc-shaped groove along a first direction. The outer sides of the top surface and the bottom surface are respectively provided with a top surface protrusion and a bottom surface protrusion along a second direction. The top surface protrusion mates with the top cover groove, and the bottom surface protrusion mates with the bottom cover groove. The first direction and the second direction are not parallel to each other. The moving contact includes a contact bridge that mates with the upper arc-shaped groove and the lower arc-shaped groove, and two moving contacts disposed at both ends of the contact bridge and facing the outside of the push block. The contact bridge is disposed between the top surface and the bottom surface and abuts against the inner side of the top surface and the inner side of the bottom surface. A through hole is provided at the center of the contact bridge. A stationary contact, located outside the push block, includes a stationary contact facing the moving contact. As the moving contact moves, the moving contact comes into contact with or separates from the stationary contact. A limiting rod, passing through the through hole, is horizontally fixed to the side wall; and A spring is sleeved on the limiting rod. One end of the spring abuts against the side cover, and the other end abuts against the contact bridge. The spring applies a pushing force to the push block and the moving contact by cooperating with the side cover, thereby causing the stationary contact to contact the moving contact.

2. The contact component with self-cleaning function according to claim 1, characterized in that: in, The angle between the first direction and the second direction is 3°~5°.

3. The contact component with self-cleaning function according to claim 1, characterized in that: in, The side surface of the stationary contact where the stationary contact point is located is called the stationary contact point plane. The side wall includes an outer plane parallel to the stationary contact point plane and an inner plane forming a certain angle with the stationary contact point plane.

4. The contact component with self-cleaning function according to claim 3, characterized in that: in, The angle between the inner plane and the top surface is 70°~80°, and the angle between the inner plane and the bottom surface is 100°~110°.

5. The contact component with self-cleaning function according to claim 1, characterized in that: in, The outer diameter of the limiting rod is adapted to the inner diameter of the spring, and is used to limit the spring.

6. The contact component with self-cleaning function according to claim 1, characterized in that: in, The contact bridge has flanges at the edges near the top and bottom surfaces. The flange abuts against the top surface and the bottom surface to limit the movement of the moving contact.

7. A switching mechanism for connecting or disconnecting a circuit under the action of a drive rod, characterized in that, include: Cover; A cam is rotatably mounted on the cover and is used to rotate under the drive of the drive rod; as well as The contact assembly with self-cleaning function as described in any one of claims 1 to 6, wherein the outer side of the push block abuts against the cam, and the inner side abuts against the inner wall of the cover via the spring, thereby driving the moving contact to move.

8. A switching mechanism according to claim 7, characterized in that: in, The cam has an arc portion and a groove portion. When the arc-shaped portion abuts against the outer side of the push block, the arc-shaped portion applies an external force to the push block, compressing the spring and causing the push block to move away from the stationary contact, thus separating the moving contact from the stationary contact. When the groove abuts against the outer side of the push block, the groove does not apply any external force to the push block, the spring returns to its original position, causing the push block to move toward the stationary contact, and the moving contact comes into contact with the stationary contact.

9. A switch, characterized in that, include: At least one switching mechanism as described in any one of claims 7 to 8, for connecting or disconnecting a circuit; as well as A drive rod is connected to the switching mechanism.

10. A switch according to claim 9, characterized in that, Also includes: A control knob, connected to the drive rod, is used to control the rotation of the drive rod.

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