Contact structure, switching device and electrical equipment
By using arc torsion springs and force transmission mechanisms in the switch structure, the initial pressure and final pressure during the closing process are maintained, and the problems of bounce caused by insufficient initial pressure and excessive final pressure in the prior art are solved. Improves the stability and service life of the switch.
Patent Information
- Application Number
- CN202411381731.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-27
AI Technical Summary
During the closing process of the existing switch structure, the initial pressure is too small, causing contact bounce and short-circuit performance, and excessive initial pressure will lead to increased wear and affect service life.
A contact structure is designed, including static contacts, support members, movable contacts and torsion springs. Through the arc structure of the torsion spring and the force transmission mechanism, the initial and final pressures are kept within a stable range and avoided bounce and wear.
The stability of the initial and final pressure during the closing process is achieved, the contact bounce and wear are reduced, and the service life of the switch is extended.
Smart Images
Figure CN119208066A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrical switches, and in particular to a contact structure, a switch device and an electrical device. Background Art
[0002] In the prior art, switch structures mainly include push-type switches and snap-on switches. Both switch structures use the position change of contacts to achieve opening and closing. In the specific closing process, when the moving contact and the static contact are in contact, an interaction force will be generated between the two, including initial pressure and final pressure. Among them, the initial pressure refers to the force between the moving contact and the static contact when they start to contact, and the final pressure refers to the contact force between the two when the closing is completed.
[0003] Specifically, during the process of closing the switch, if the initial pressure of the contact is too small, it will cause serious contact bounce and poor short-circuit performance, affecting the stability of the switch closing. If the initial pressure is increased, the final pressure will generally increase, which will increase the wear between the moving contact and the static contact, affecting the service life of the switch. Summary of the invention
[0004] The purpose of the present application is to provide a contact structure, a switch device and an electrical device, which can solve the problem in the prior art that the initial pressure and the final pressure when the moving contact and the static contact are closed are unstable, affecting the closing effect and the service life of the switch.
[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an embodiment of the present application provides a contact structure, which includes a static contact, a support, a moving contact and a torsion spring. The support is rotatably arranged on the main shaft, and the outer wall of the support is arranged as an arc surface structure. The moving contact includes a rotating body and a contact portion, the rotating body is rotatably arranged on the main shaft, the contact portion is connected to the rotating body, and the contact portion can be in contact and conduction with the static contact. The torsion spring is arranged between the rotating body and the support, and a torsion shaft is rotatably arranged on the rotating body, and the torsion spring is sleeved on the torsion shaft. Among them, the two ends of the torsion spring are respectively abutted against the moving contact and the outer wall of the support, and the torsion spring can slide along the outer wall of the support.
[0006] Based on the above-mentioned embodiments of the present application, during the closing process of the contact structure, a wrench or other structure is provided to drive the support member to rotate, and when the support member rotates, the torsion spring is compressed to transmit force, thereby driving the moving contact to rotate and contact with the static contact to achieve closing. Specifically, when the support member rotates, the force is transmitted to the rotating body or the contact part through the torsion spring, and then when the moving contact rotates as a whole, the contact part contacts with the static contact to achieve closing and conduction. In this process, since the torsion spring is directly arranged on the moving contact through the torsion shaft, and the torsion spring can slide along the outer wall of the support member. When the closing process begins, the angle between the two ends of the torsion spring is α. When the static contact begins to contact the contact part, an initial pressure F1 appears between the static contact and the moving contact. At this time, the corresponding angle between the two ends of the torsion spring remains at α. When the closing process continues, the moving contact can no longer rotate. When the support continues to rotate, one end of the torsion spring slides along the outer wall of the support, so that the angle between the two ends of the torsion spring remains at α. At this time, the pressure of the torsion spring on the contact part is equal to the initial pressure F1 until the closing process is completed. At this time, the final pressure F2 between the static contact and the moving contact is equal to the initial pressure F1, so that the initial pressure F1 and the final pressure F2 remain stable during the closing process, avoiding problems such as contact bounce and short circuit connection caused by too small initial pressure F1, and also avoiding the problem of increased mechanical wear of the contacts affecting the service life due to excessive final pressure F2. At the same time, through the above-mentioned arrangement of the present application, after the contact position between the moving contact and the static contact is worn, the torsion spring can slide along the outer wall of the support member, so that the moving contact moves a larger stroke to achieve stable contact with the static contact. During this process, the angle between the two ends of the torsion spring remains unchanged, that is, the force applied by the torsion spring to the moving contact remains unchanged, so that the pressure between the moving contact and the static contact remains stable.
[0007] In some embodiments, a first abutment arm and a second abutment arm are respectively provided at both ends of the torsion spring. The first abutment arm abuts against the moving contact along the torsion direction of the torsion spring, and the second abutment arm abuts against the outer wall of the support member along the torsion direction of the torsion spring. The second abutment arm can slide along the outer wall of the support member.
[0008] Based on the above-mentioned embodiments of the present application, by respectively arranging a first abutment arm and a second abutment arm at both ends of the torsion spring, the torsion spring can better contact with the moving contact and the support member, so that the power transmission of the torsion spring between the support member and the moving contact is more stable, thereby making the force acting on the moving contact more stable, and making the closing process more stable.
[0009] In some embodiments, a stop block is provided on the outer wall of the support member, the stop block is provided as an arc-shaped structure, and the second abutting arm can abut against the stop block when sliding along the outer wall of the support member.
[0010] Based on the above-mentioned embodiments of the present application, a stop block is arranged on the outer wall of the support member, so that the second abutment arm can contact the stop block when the closing operation begins, so that the relative position of the torsion spring and the support member remains stable, thereby keeping the force transmitted to the contact part by the support member through the torsion spring stable, and keeping the initial pressure F1 generated between the contact part and the static contact when the contact part begins to contact the static contact stable, thereby reducing the possibility of problems such as contact bounce and short circuit connection caused by too small initial pressure F1.
[0011] In some embodiments, a wrench structure is directly or indirectly connected to the support member to drive the support member to rotate.
[0012] Based on the above-mentioned embodiments of the present application, the wrench structure is an integral part of the switch device. During the closing and opening processes, the wrench structure drives the support member to rotate, thereby realizing the closing and opening processes.
[0013] In some embodiments, a first stopper is further provided on the wrench structure, and the first stopper rotates with the wrench structure. A second stopper is also formed on the rotating body, and the second stopper can abut against the first stopper when the moving contact rotates with the wrench structure.
[0014] Based on the above-mentioned embodiments of the present application, by setting a first stop block and a second blocking portion, during the rotation of the moving contact, when the second blocking portion abuts against the first stop block, the first stop block restricts the moving contact from continuing to rotate. At this time, as the wrench structure and the support member continue to rotate, the torsion spring is twisted to store energy, and then the torsion spring passes over the stop block under the action of its own elastic force. In the process of the torsion spring passing over the stop block and being quickly released, the force applied by the torsion spring to the contact portion will be phased in, thereby accelerating the closing contact speed between the contact portion and the static contact, thereby protecting the contact structure.
[0015] In some embodiments, a first abutting surface is formed on the first stopper, the first abutting surface is configured as an arc surface structure, and the second blocking portion can abut against the first abutting surface.
[0016] Based on the above-mentioned embodiments of the present application, by setting the first abutting surface on the first stop block that contacts the second blocking part to an arc surface, when the torsion spring is twisted to complete energy storage and then passes over the stop block to complete the release, as the wrench structure and the support member and the moving contact continue to rotate, the second blocking part slides along the first abutting surface and disengages from the first stop block, and then the support member and the moving contact continue to rotate driven by the wrench structure to complete the closing process.
[0017] In some embodiments, a third stopper is provided on the support member, and a fourth stopper is provided on the rotating body along a rotation path of the third stopper, and the third stopper can abut against the fourth stopper when the support member rotates.
[0018] Based on the above-mentioned embodiment of the present application, the support member and the rotating body are driven by a torsion spring, and by setting a fourth block on the rotation path of the third block, when the torsion spring cannot work normally due to other reasons, or the stiffness coefficient is too small due to unreasonable setting of the torsion spring, at this time, after the support member and the rotating body rotate relative to each other for a certain distance, the third block abuts against the fourth block, thereby driving the rotating body to rotate and realizing the closing drive of the moving contact. That is, by setting the third block and the fourth block, the moving contact can be driven in extreme cases, further improving the safety of the contact structure.
[0019] In some embodiments, the contact portion is arranged tangentially to the rotation direction of the support member.
[0020] Based on the above-mentioned embodiment, by arranging the contact portion tangentially along the rotation direction of the support member, specifically, the extension direction of the contact portion is opposite to the tangential direction of the rotation direction of the support member, so that the contact portion can better contact with the static contact during the process that the contact portion and the entire moving contact rotate with the support member, so that the contact between the two is more stable, thereby improving the conduction effect when closing the switch.
[0021] According to a second aspect of the present application, a switch device is provided, which includes a wrench structure and the above-mentioned contact structure, and the wrench structure is used to drive the support member to move.
[0022] Based on the above-mentioned embodiments of the present application, the switching device provided by the present application includes the above-mentioned contact structure. Through the setting of the above-mentioned contact structure, the initial pressure F1 and the final pressure F2 can be kept stable within an appropriate range during the closing process, thereby reducing the possibility of contact bounce and short circuit connection caused by too small initial pressure F1 during the closing process of the switching device, and at the same time reducing the possibility of increased mechanical wear of the contacts affecting the service life due to excessive final pressure F2 during the closing process.
[0023] According to a third aspect of the present application, an electrical device is provided. The electrical device includes a housing and the above-mentioned switch device, wherein the switch device is arranged in the housing.
[0024] Based on the above-mentioned embodiments of the present application, the electrical equipment provided by the present application includes the above-mentioned switching device, and therefore also has the above-mentioned beneficial effects. In order to avoid repetition, they will not be described here.
[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:
[0027] Figure 1 It is a schematic diagram of the structure of the compression spring switch in the prior art at the initial pressure.
[0028] Figure 2 It is a schematic diagram of the structure of the compression spring switch at the final pressure in the prior art.
[0029] Figure 3 It is a structural schematic diagram of the torsion spring switch in the prior art at the initial pressure.
[0030] Figure 4 It is a structural schematic diagram of a torsion spring switch in the prior art at the final pressure.
[0031] Figure 5 It is a structural schematic diagram of the contact structure provided in an embodiment of the present application.
[0032] Figure 6 It is a structural schematic diagram of the contact structure in the open state provided by an embodiment of the present application.
[0033] Figure 7 It is a structural schematic diagram of the contact structure restriction state provided in an embodiment of the present application.
[0034] Figure 8 It is a structural schematic diagram of the initial pressure state of the contact structure provided in an embodiment of the present application.
[0035] Fig. 9 It is a structural schematic diagram of the final pressure state of the contact structure provided in an embodiment of the present application.
[0036] Fig.10 It is a structural schematic diagram of the contact structure compensation state provided in an embodiment of the present application.
[0037] Fig.11 It is a schematic diagram of the internal structure of the switch device provided in an embodiment of the present application.
[0038] Description of Reference Numerals
[0039] 1. Static contact; 2. Support member; 21. Stop block; 22. Third stop block; 3. Main shaft; 4. Moving contact; 41. Rotating body; 42. Contact portion; 43. Second stop portion; 44. Fourth stop block; 5. Torsion spring; 51. Torsion shaft; 52. First abutting arm; 53. Second abutting arm; 6. Wrench structure; 61. First stop block; 62. First abutting surface. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0042] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0044] In the description of this application, it should be noted that, in the absence of any contrary explanation, the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0045] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0046] In the prior art, switch structures mainly include push-type switches and snap-on switches. Both switch structures use the position change of contacts to achieve opening and closing. In the specific closing process, when the moving contact and the static contact are in contact, an interaction force will be generated between the two, including initial pressure and final pressure. Among them, the initial pressure refers to the force between the moving contact and the static contact when they start to contact, and the final pressure refers to the contact force between the two when the closing is completed.
[0047] refer to Figures 1 to 4 As shown in Figure 1 and Figure 2 The schematic diagrams of the structure when the initial pressure and the final pressure are generated when the compression spring switch in the prior art is closed are respectively shown. When the static contact and the moving contact first come into contact, the moving contact generates an initial pressure of interaction with the static contact under the action of the compression spring. Then, as the closing process continues, the compression spring is further compressed, and the force of the compression spring acting on the moving contact increases, thereby increasing the final pressure of interaction between the moving contact and the static contact.
[0048] Figure 3 and Figure 4 The schematic diagrams of the structures when the initial pressure and the final pressure are generated when the torsion spring switch in the prior art is closed are respectively shown. When the static contact and the moving contact first come into contact, the moving contact generates an initial pressure of interaction with the static contact under the action of the torsion spring. Then, as the closing process continues, the torsion spring is further twisted, and the force of the torsion spring acting on the moving contact increases, thereby increasing the final pressure of interaction between the moving contact and the static contact.
[0049] Specifically, during the process of closing the switch, if the initial pressure of the contact is too small, it will cause serious contact bounce and poor short-circuit performance, affecting the stability of the switch closing. If the initial pressure is increased, the final pressure will generally increase, which will increase the wear between the moving contact and the static contact, affecting the service life of the switch.
[0050] In order to solve the above problems in the prior art, according to the first aspect of the present application, reference is made to Figure 5 As shown in , an embodiment of the present application provides a contact structure, which includes a static contact 1, a support member 2, a moving contact 4 and a torsion spring 5. The support member 2 is rotatably arranged on the main shaft 3, and the outer wall of the support member 2 is arranged as an arc surface structure. The moving contact 4 includes a rotating body 41 and a contact portion 42, the rotating body 41 is rotatably arranged on the main shaft 3, the contact portion 42 is connected to the rotating body 41, and the contact portion 42 can be in contact and conduction with the static contact 1. The torsion spring 5 is arranged between the rotating body 41 and the support member 2, and a torsion shaft 51 is rotatably arranged on the rotating body 41, and the torsion spring 5 is sleeved on the torsion shaft 51. Among them, the two ends of the torsion spring 5 are respectively abutted against the moving contact 4 and the outer wall of the support member 2, and the torsion spring 5 can slide along the outer wall of the support member 2.
[0051] Based on the above-mentioned embodiments of the present application, during the closing process of the contact structure, a wrench or other structure is provided to drive the support member 2 to rotate, and when the support member 2 rotates, the torsion spring 5 is compressed to transmit force, thereby driving the moving contact 4 to rotate and contact with the static contact 1 to achieve closing. Specifically, when the support member 2 rotates, the force is transmitted to the rotating body 41 or the contact portion 42 through the torsion spring 5, and then when the moving contact 4 rotates as a whole, the contact portion 42 contacts with the static contact 1 to achieve closing and conduction. In this process, since the torsion spring 5 is directly arranged on the moving contact 4 through the torsion shaft 51, and the torsion spring 5 can slide along the outer wall of the support member 2.
[0052] At the beginning of closing, the angle between the two ends of the torsion spring 5 is α. When the static contact 1 and the contact part 42 begin to contact, an initial pressure F1 appears between the static contact 1 and the moving contact 4. At this time, the corresponding angle between the two ends of the torsion spring 5 remains at α. When the closing process continues, the moving contact 4 can no longer rotate. When the support member 2 continues to rotate, one end of the torsion spring 5 slides along the outer wall of the support member 2, so that the angle between the two ends of the torsion spring 5 remains at α. At this time, the pressure of the torsion spring 5 on the contact part 42 is equal to the initial pressure F1 until the closing process is completed. At this time, the final pressure F2 between the static contact 1 and the moving contact 4 is equal to the initial pressure F1, so that the initial pressure F1 and the final pressure F2 remain stable during the closing process, avoiding problems such as severe contact bounce and poor short-circuit performance caused by too small initial pressure F1, and also avoiding the problem of increased mechanical wear of the contacts due to excessive final pressure F2 affecting the service life.
[0053] At the same time, through the above-mentioned arrangement of the present application, after the contact position between the moving contact 4 and the stationary contact 1 is worn, the torsion spring 5 can slide along the outer wall of the support member 2, so that the moving contact 4 moves a larger stroke to stably contact with the stationary contact 1. During this process, the angle between the two ends of the torsion spring 5 remains unchanged, that is, the force applied by the torsion spring 5 to the moving contact 4 remains unchanged, so that the pressure between the moving contact 4 and the stationary contact 1 remains stable.
[0054] Specifically, refer to Figure 5 As shown in , in the present application, the static contact 1 and the contact portion 42 may also be provided with contact points, respectively. The provision of the contact points can, on the one hand, make the contact between the static contact 1 and the moving contact 4 more stable when the two are closed and turned on. On the other hand, the mechanical wear of the contact position between the static contact 1 and the moving contact 4 can be reduced by separately providing the contact points with other hard conductor materials, thereby extending the service life of the contact structure.
[0055] In the present application, the end of the torsion spring 5 abuts against the moving contact 4. In the specific assembly process, the end of the torsion spring 5 can directly abut against any one of the rotating body 41 and the contact portion 42. Figure 5As shown in , in an exemplary embodiment provided in the present application, the end of the torsion spring 5 abuts against the contact portion 42. Since the contact portion 42 protrudes from the rotating body 41, setting the end of the torsion spring 5 abutting against the contact portion 42 can leave more space for the setting of the torsion spring 5.
[0056] Furthermore, in the present application, when the above-mentioned structure is specifically produced and assembled, the above-mentioned structure is arranged in the housing of the switch device. At this time, the main shaft 3 is rotatably arranged on the housing, and then the support member 2 and the rotating body 41 are rotatably arranged on the main shaft 3 in turn. The torsion spring 5 is arranged on the rotating body 41 through the torsion shaft 51, so the relative position between the torsion spring 5 and the rotating body 41 and the contact portion 42 is fixed, and the driving is achieved by the torsion spring 5 being arranged between the support member 2 and the contact portion 42.
[0057] In addition, it should be noted that in the present application, the specific material and other parameters of the torsion spring 5 can be selected according to the specific size of the contact structure and the application conditions, and the torsion spring 5 with different stiffness coefficients can be selected according to the size of the contact structure, and the present application does not impose specific restrictions on this.
[0058] refer to Figure 5 As shown in the figure, in the present application, a first abutment arm 52 and a second abutment arm 53 can be respectively provided at both ends of the torsion spring 5, the first abutment arm 52 abuts against the contact portion 42 along the torsion direction of the torsion spring 5, and the second abutment arm 53 abuts against the outer wall of the support member 2 along the torsion direction of the torsion spring 5, and the second abutment arm 53 can slide along the outer wall of the support member 2.
[0059] Based on the above-mentioned embodiments of the present application, by respectively providing a first abutment arm 52 and a second abutment arm 53 at both ends of the torsion spring 5, the torsion spring 5 can better contact the contact portion 42 and the support member 2, so that the power transmission of the torsion spring 5 between the support member 2 and the moving contact 4 is more stable, thereby making the force acting on the contact portion 42 more stable, and making the closing process more stable.
[0060] Specifically, in the actual setting, the first abutment arm 52 and the second abutment arm 53 are respectively arranged at the two ends of the torsion spring 5, and the first abutment arm 52 and the second abutment arm 53 both extend axially along the torsion spring 5, so that the abutment between the first abutment arm 52 and the second abutment arm 53 and the outer wall of the support member 2 and the contact portion 42 is more stable.
[0061] refer to Figure 5 and Figure 6 As shown in , in some embodiments of the present application, a stop block 21 is provided on the outer wall of the support member 2, the stop block 21 is configured as an arc structure, and the second abutment arm 53 can abut against the stop block 21 when sliding along the outer wall of the support member 2.
[0062] Based on the above-mentioned embodiments of the present application, by setting a stop block 21 on the outer wall of the support member 2, the second abutment arm 53 can contact the stop block 21 when the closing starts, so that the relative position of the torsion spring 5 and the support member 2 remains stable, thereby making the force transmitted from the support member 2 to the contact portion 42 through the torsion spring 5 remain stable, so that the initial pressure F1 generated between the contact portion 42 and the static contact 1 when the contact portion 42 begins to contact the static contact 1 remains stable, thereby reducing the possibility of problems such as contact bounce and short circuit connection caused by too small initial pressure F1.
[0063] refer to Figure 6 As shown in FIG. 1 , in some embodiments of the present application, a wrench structure 6 is directly or indirectly connected to the support member 2 to drive the support member 2 to rotate.
[0064] Based on the above-mentioned embodiments of the present application, the wrench structure 6 is an integral part of the switch device. During the closing and opening processes, the wrench structure 6 drives the support member 2 to rotate, thereby realizing the closing and opening processes.
[0065] Specifically, the wrench structure 6 can be partially disposed inside the shell and partially disposed outside the shell. At the same time, the wrench structure 6 can be configured to be made of insulating material to further improve safety.
[0066] Meanwhile, the specific transmission structure between the wrench structure 6 and the support member 2 can be set in any suitable manner, and the present application does not impose any specific limitation on this. Figure 6 As shown in FIG. 1 , in an exemplary embodiment provided by the present application, the wrench structure 6 is connected to the support member 2 via a bent connecting rod structure, and both ends of the connecting rod structure are rotatably connected to the wrench structure 6 and the support member 2. When the wrench structure 6 rotates, the supporting member 2 is pushed to rotate along the tangential direction of the supporting member 2 via the connecting rod structure.
[0067] refer to Figure 6 As shown in , in some embodiments of the present application, a first stop block 61 is further provided on the wrench structure 6, and the first stop block 61 rotates with the wrench structure 6. A second blocking portion 43 is also formed on the rotating body 41, and when the moving contact 4 rotates with the wrench structure 6, the second blocking portion 43 can abut against the first stop block 61.
[0068] Based on the above-mentioned embodiments of the present application, by setting a first stop block 61 and a second stop portion 43, during the rotation of the moving contact 4, after the second stop portion 43 abuts against the first stop block 61, the first stop block 61 restricts the moving contact 4 from continuing to rotate. At this time, as the wrench structure 6 and the support member 2 continue to rotate, the torsion spring 5 is twisted to store energy, and then the torsion spring 5 passes over the stop block 21 under the action of its own elastic force. In the process of the torsion spring 5 passing over the stop and being quickly released, the force applied by the torsion spring 5 to the contact portion 42 will be phased in, thereby accelerating the closing contact speed between the contact portion 42 and the static contact 1, thereby protecting the contact structure.
[0069] Further, in some embodiments of the present application, a first abutting surface 62 is formed on the first stopper 61 , and the first abutting surface 62 is configured as an arc surface structure, and the second blocking portion 43 can abut against the first abutting surface 62 .
[0070] Based on the above-mentioned embodiments of the present application, by setting the first abutment surface 62 on the first stop block 61 that contacts the second blocking portion 43 to an arc surface, when the torsion spring 5 is twisted to complete energy storage and then passes over the stop block 21 to complete the release, as the wrench structure 6 and the support member 2 and the moving contact 4 continue to rotate, the second blocking portion 43 slides along the first abutment surface 62 and disengages from the first stop block 61, and then the support member 2 and the moving contact 4 continue to rotate under the drive of the wrench structure 6 to complete the closing process.
[0071] refer to Figures 6 to 9 As shown in , based on the above configuration of the present application, the closing process of the contact structure in the present application may include the following stages:
[0072] First, refer to Figure 6 As shown in , in the initial state, the static contact 1 and the moving contact 4 are in an open state, and the angle between the two ends of the torsion spring 5 is α.
[0073] Then, refer to Figure 7 As shown in , the circuit breaker starts to close, the rotating spanner structure 6 drives the support member 2 to rotate, and when the support member 2 rotates, the torsion spring 5 pushes the contact portion 42 and the rotating body 41 to move together, and then the spanner structure 6 and the moving contact 4 move a certain distance, and then the first stopper 61 abuts against the second stopper 43, thereby limiting the moving contact 4 from continuing to rotate, and then the spanner structure 6 drives the support member 2 to continue to rotate, at which time the torsion spring 5 begins to be compressed and stores energy, and the angle between the two ends of the torsion spring 5 is less than α. Then, under the action of its own elastic force, the torsion spring 5 moves along the stopper 21 of the arc structure and passes over the stopper 21, and the energy of the torsion spring 5 is released, and the angle between the two ends of the torsion spring 5 is restored to α.
[0074] Then, refer to Figure 8 As shown in the figure, as the wrench structure 6 and the moving contact 4 continue to rotate, the second blocking portion 43 disengages from the first abutting surface 62 until the contact portion 42 comes into contact with the static contact 1. At this time, an initial pressure F1 appears between the moving contact 4 and the static contact 1. At this time, the angle between the two ends of the torsion spring 5 is considered to be α.
[0075] Finally, reference Fig. 9As shown in , as the wrench structure 6 and the support 2 continue to rotate, the moving contact 4 is unable to continue to rotate because the moving contact 4 has come into contact with the static contact 1. In this case, in the torsion spring 5 switch structure of the prior art, the torsion spring has begun to be compressed, which leads to an increase in the pressure between the two contacts. However, since one end of the torsion spring 5 in the present application can slide along the outer wall of the support 2, the torsion spring 5 will not be twisted, but the second abutment arm 53 of the torsion spring 5 slides counterclockwise along the outer wall of the support 2, so that the angle between the two ends of the torsion spring 5 remains α. Therefore, from the beginning of the contact between the moving contact 4 and the static contact 1 until the closing process is completed, the angle between the two ends of the torsion spring 5 remains α. Therefore, when the closing is completed, the final pressure F2 between the static contact 1 and the moving contact 4 is equal to the initial pressure F1. The pressure between the static contact 1 and the moving contact 4 can be kept within a suitable range during the entire closing process. Reduce the possibility of a series of problems caused by excessive initial pressure F1 or final pressure F2.
[0076] At the same time, reference Fig.10 As shown in , through the above-mentioned setting of the present application, when the contact structure is worn after being used for a period of time, the moving contact 4 needs to move a larger stroke to stably contact with the stationary contact 1. At this time, in the torsion spring 5 switch structure of the prior art, the torsion spring will be released to a certain extent, which will lead to a reduction in the force applied to the moving contact 4, so that the force between the stationary contact 1 and the moving contact 4 is reduced. In some cases, the pressure between the stationary contact 1 and the moving contact 4 may not meet the requirements, resulting in the separation of the stationary contact 1 and the moving contact 4 and other problems.
[0077] Through the above-mentioned arrangement of the present application, since the second abutment arm 53 of the torsion spring 5 can slide along the outer wall of the support member 2, and the torsion spring 5 is directly arranged on the rotating body 41 of the moving contact 4 through the torsion shaft 51, when the moving contact 4 needs to move a larger stroke to achieve stable contact with the static contact 1, the second abutment arm 53 slides clockwise along the outer wall of the support member 2, so that the angle between the two ends of the torsion spring 5 remains unchanged, and then the force applied by the torsion spring 5 to the moving contact 4 remains unchanged, so that the force between the moving contact 4 and the static contact 1 remains unchanged, thereby realizing automatic compensation, so that at this time the pressure between the static contact 1 and the moving contact 4 still meets the use requirements, thereby ensuring the stability of the contact between the static contact 1 and the moving contact 4.
[0078] In some embodiments of the present application, a third stopper 22 is provided on the support member 2, and a fourth stopper 44 is provided on the rotating body 41 along the rotation path of the third stopper 22, so that the third stopper 22 can abut against the fourth stopper 44 when the support member 2 rotates.
[0079] Based on the above-mentioned embodiment of the present application, the support member 2 and the rotating body 41 are driven by the torsion spring 5, and the fourth stopper 44 is arranged on the rotation path of the third stopper 22. When the torsion spring 5 cannot work normally due to other reasons, or the stiffness coefficient is too small due to the unreasonable arrangement of the torsion spring 5, the third stopper 22 abuts against the fourth stopper 44 after the support member 2 and the rotating body 41 rotate relative to each other for a certain distance, thereby driving the rotating body 41 to rotate and realize the closing drive of the moving contact 4. That is, by setting the third stopper 22 and the fourth stopper 44, the moving contact 4 can be driven in extreme cases, further improving the safety of the contact structure.
[0080] Furthermore, in the present application, any suitable arrangement can be selected for the specific structure of the contact portion 42. In an exemplary embodiment provided in the present application, the contact portion 42 can be arranged tangentially to the rotation direction of the support member 2.
[0081] Based on the above-mentioned embodiments of the present application, by arranging the contact portion 42 tangentially along the rotation direction of the support member 2, specifically, the extension direction of the contact portion 42 is opposite to the tangential direction of the rotation direction of the support member 2, so that during the process that the contact portion 42 and the entire moving contact 4 rotate with the support member 2, the contact portion 42 can better contact with the static contact 1, so that the contact between the two is more stable, thereby improving the conduction effect when closing the switch.
[0082] On the basis of the above technical solution, according to the second aspect of the present application, a switch device is provided, referring to Fig.11 As shown in FIG, the switch device includes a wrench structure 6 and the above-mentioned contact structure, and the wrench structure 6 is used to drive the support member 2 to move.
[0083] Based on the above-mentioned embodiments of the present application, the switching device provided by the present application includes the above-mentioned contact structure. Through the setting of the above-mentioned contact structure, the initial pressure F1 and the final pressure F2 can be kept stable within an appropriate range during the closing process, thereby reducing the possibility of contact bounce and short circuit connection caused by too small initial pressure F1 during the closing process of the switching device, and at the same time reducing the possibility of increased mechanical wear of the contacts affecting the service life due to excessive final pressure F2 during the closing process.
[0084] In addition, it should be noted that in the present application, the specific structure of the switch device is not limited to the above components, and can be specifically set according to the specific application conditions of the switch device. In some embodiments of the present application, the switch device may also include an arc extinguishing structure, which is arranged at the closing position of the moving contact 4 and the static contact 1, wherein the arc extinguishing structure can be specifically set to a magnetic blow-out arc extinguishing structure and a gas blow-out arc extinguishing structure, etc., and the present application does not make specific restrictions on this.
[0085] On the basis of the above technical solution, according to a third aspect of the present application, an electrical device is provided, which includes a housing and the above switch device, wherein the switch device is arranged in the housing.
[0086] Based on the above-mentioned embodiments of the present application, the electrical equipment provided by the present application includes the above-mentioned switching device, and therefore also has the above-mentioned beneficial effects. In order to avoid repetition, they will not be described here.
[0087] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.
[0088] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.
[0089] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.
Claims
1. A contact structure, characterized in that: The contact structure comprises: Stationary contact; A support member is rotatably arranged on the main shaft, and an outer wall of the support member is arranged as a curved surface structure; The moving contact comprises a rotating body and a contact portion, wherein the rotating body is rotatably arranged on the main shaft, the contact portion is connected to the rotating body, and the contact portion can be in contact and conduction with the stationary contact; A torsion spring is arranged between the rotating body and the supporting member, a torsion shaft is rotatably arranged on the rotating body, and the torsion spring is sleeved on the torsion shaft; Wherein, two ends of the torsion spring are respectively in contact with the moving contact and the outer wall of the support member, and the torsion spring can slide along the outer wall of the support member.
2. The contact structure according to claim 1, characterized in that: The torsion spring has a first abutment arm and a second abutment arm at both ends, the first abutment arm abuts against the moving contact along the torsion direction of the torsion spring, the second abutment arm abuts against the outer wall of the support member along the torsion direction of the torsion spring, and the second abutment arm can slide along the outer wall of the support member.
3. The contact structure according to claim 2, characterized in that: A stop block is arranged on the outer wall of the support member, the stop block is arranged as an arc-shaped structure, and the second abutting arm can abut against the stop block when sliding along the outer wall of the support member.
4. The contact structure according to claim 1, characterized in that: The support member is directly or indirectly connected with a wrench structure for driving the support member to rotate.
5. The contact structure according to claim 4, characterized in that: The spanner structure is also provided with a first stopper, which rotates with the spanner structure. A second stopper is also formed on the rotating body, and the second stopper can abut against the first stopper when the moving contact rotates with the spanner structure.
6. The contact structure according to claim 5, characterized in that: A first abutting surface is formed on the first stopper, the first abutting surface is configured as an arc surface structure, and the second blocking portion can abut against the first abutting surface.
7. The contact structure according to claim 1, characterized in that: The support member is provided with a third stopper, and the rotating body is provided with a fourth stopper along the rotation path of the third stopper. When the support member rotates, the third stopper can abut against the fourth stopper.
8. The contact structure according to claim 1, characterized in that: The contact portion is arranged along a tangent direction of the rotation direction of the support member.
9. A switch device, characterized in that: The switch device comprises: a wrench structure; and, According to the contact structure as described in any one of claims 1 to 8, the wrench structure is used to drive the supporting member to move.
10. An electrical device, characterized in that: The electrical equipment comprises: a housing; and The switch device according to claim 9, wherein the switch device is disposed in the housing.