Static contact structure and switching device

Abstract

The utility model provides a static contact structure and a switching device, and relates to the technical field of electrical equipment. The static contact structure provided by the utility model comprises a contact piece, a contact point, a connecting block and a terminal strip. The contact is connected to one side of the contact piece and used for being matched with a moving contact structure, the connecting block and the terminal strip are connected to the other side of the contact piece at intervals, and the connecting block has guidance quality. In the direction from one side of the contact piece to the other side of the contact piece, the projection of the connecting block covers the projection of the contact. As such, the connection block may also provide a flow path for the current. Through the arrangement of the connecting block, the sectional area of a part used for bearing current between the contact and the terminal strip can be larger, so that the current-carrying capacity of the part is larger, the temperature rise problem at the static contact structure is improved, and the temperature rise of a switching device carrying the static contact structure can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a static contact structure and a switching device. BACKGROUND

[0002] The switching device is a kind of electrical appliance that can connect or cut off the circuit, generally comprising a moving contact and a static contact, the moving contact can realize the connection or separation of the moving contact and the static contact based on electromagnetic, pneumatic, mechanical transmission and other principles, thereby controlling the on-off of the circuit.

[0003] When the switching device is closed to make the moving contact and the static contact connected, the current carrying capacity at the position where the moving contact and the static contact are connected is small, which will cause the temperature rise of the switching device to be large, thereby affecting the normal work of the switching device and reducing the performance of the switching device. CONTENT OF THE INVENTION

[0004] The present application provides a static contact structure and a switching device, which can reduce the temperature rise of the switching device and reduce the influence on the work and performance of the switching device.

[0005] In a first aspect, the present application provides a static contact structure, comprising a contact sheet, a contact point, a connecting block and a terminal row. The contact point is connected to one side of the contact sheet and is used to cooperate with a moving contact structure, and the connecting block is connected to the other side of the contact sheet and is spaced apart from the terminal row, wherein the connecting block has a guiding property. In the direction from the one side of the contact sheet to the other side of the contact sheet, the projection of the connecting block covers the projection of the contact point.

[0006] Through the above scheme, the current can flow at the contact sheet and the connecting block between the contact point and the terminal row. Therefore, the setting of the connecting block can make the cross-sectional area of the part between the contact point and the terminal row for carrying current larger, improve the current carrying capacity of this part, and can improve the problem of large temperature rise at the static contact structure, and reduce the possibility that the normal work and performance of the switching device are affected due to large temperature rise.

[0007] Optionally, the connecting block and the contact sheet are an integral structure.

[0008] Through the above setting, the connecting block and the contact sheet can be obtained in one time of manufacturing. In this way, the manufacturing process of forming the connecting block on the contact sheet is simplified, and the number of parts of the static contact structure can also be reduced, which is convenient for assembling the static contact structure.

[0009] Optionally, the static contact structure further comprises a fastener, the connecting block is provided with a first connecting hole, the contact sheet is provided with a second connecting hole, and the fastener is arranged in the first connecting hole and the second connecting hole.

[0010] In this way, the connecting block and the contact piece are two separate parts, and the connecting block and the contact piece can be connected through fasteners. The arrangement of forming the connecting block on the contact piece can also be implemented, and the connecting block can carry current, thereby improving the temperature rise of the static contact structure.

[0011] Optionally, an intermediate part is further arranged between the connecting block and the contact piece, and current flows between the contact and the movable contact structure when the contact and the movable contact structure are in contact. The current can flow from the contact piece to the connecting block through the intermediate part.

[0012] In this way, at the end of the contact piece where the contact is arranged, the current can flow in the contact piece, the intermediate part and the connecting block, and the current carrying capacity at this position can be larger, thereby reducing the temperature rise of the static contact structure.

[0013] Optionally, the electrical conductivity of the intermediate part is σ1, the electrical conductivity of the contact piece is σ2, and the electrical conductivity of the connecting block is σ3, and σ1 < σ2 and σ1 < σ3 are satisfied.

[0014] In the embodiments of the present application, the electrical conductivity of the intermediate part is smaller, which is more suitable for the size of the current density at the intermediate part. In this way, the intermediate part can be made of a material with smaller electrical conductivity, thereby reducing the cost of the intermediate part.

[0015] Optionally, the side of the connecting block facing the contact piece is provided with a first mounting groove, and the side of the contact piece facing the connecting block is provided with a second mounting groove. The first mounting groove and the second mounting groove are opposite and communicate to form a mounting space, and the intermediate part is arranged in the mounting space.

[0016] Through the above arrangement, the first mounting groove makes the use of the connecting block less, and the second mounting groove makes the use of the contact piece less. Therefore, the cost of the contact piece and the connecting block can be reduced while ensuring the current carrying capacity.

[0017] In a second aspect, the present application provides a switch device, which comprises the static contact structure of any one of the first aspect.

[0018] Optionally, the switch device comprises a housing and a pad, and the pad and the static contact structure are arranged in the housing, and the contact piece is fixed to the housing. The pad is arranged between the housing and the connecting block, and the pad is used to buffer the force transmitted from the contact piece to the housing when the static contact and the movable contact structure are in contact.

[0019] Optionally, the pad has thermal conductivity, and the pad can also absorb the heat generated by the connecting block.

[0020] Optionally, the housing is provided with a heat dissipation hole, and the heat dissipation hole penetrates the housing. In the direction from the pad to the contact piece, the pad covers at least part of the heat dissipation hole. In the case that the pad absorbs heat, the pad can also transmit the heat to the heat dissipation hole.

[0021] The switch device provided by the second aspect and the possible designs of the second aspect has the advantages of the first aspect and the possible designs of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A cross-sectional view of a switch device according to an embodiment of the present application.

[0023] Figure 2 A schematic view of a stationary contact structure according to an embodiment of the present application.

[0024] Figure 3 A schematic view of another stationary contact structure according to an embodiment of the present application.

[0025] Figure 4 A schematic view of still another stationary contact structure according to an embodiment of the present application.

[0026] Figure 5 A schematic view of a stationary contact structure according to an embodiment of the present application. Figure 4 An exploded view of a stationary contact structure.

[0027] Figure 6 A schematic view of a stationary contact structure according to an embodiment of the present application.

[0028] REFERENCE SIGNS:

[0029] 100: stationary contact structure; 10: contact piece; 11: second mounting groove; 20: contact; 30: connecting block; 31: first connecting hole; 32: first mounting groove; 40: terminal row; 101: fastener; 50: intermediate part; 200: switch device; 201: housing; 202: pad block; 203: heat dissipation hole; 210: movable contact structure. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise" and "comprising", or "include" and "including" or "has" and "having" and any variations thereof, is intended to cover a non-exclusive inclusion.

[0032] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0033] The term "and / or", merely describes association between associated objects, means that there can be three kinds of relations, for example, A and / or B, can represent: there is A, there is A and B, there is B. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0034] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. For example, in the description of the application, the terms "center", "lengthwise", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0035] In addition, the terms "first", "second", etc. in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.

[0036] In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0037] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, the "connection" or "connecting" of mechanical structures can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by a spacer, for example, fixed connection by screws, bolts or other spacers; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. The "connection" or "connecting" of the circuit structure can mean electrical connection or signal connection in addition to physical connection, for example, it can be direct connection, that is, physical connection, or indirect connection through at least one intermediate element, as long as the circuit is connected, it can also be the internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0038] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0039] The switch device generally includes a static contact structure and a movable contact structure, wherein the movable contact structure is movably arranged, and the movable contact structure can be moved relative to the static contact structure by operation, so that the movable contact structure can be in contact or separated from the static contact structure, to realize the closing or opening of the switch device. In this way, the switch device can realize the connection or disconnection of the circuit.

[0040] When the switch device is connected in the circuit and the static contact structure is in contact with the movable contact structure, a path can be formed between the static contact structure and the movable contact structure, and current can flow between the static contact structure and the movable contact structure. The specific flow path of the current is related to the connection mode of the switch device and the circuit.

[0041] The switch device has a line-in end and a line-out end. When the static contact structure is connected to the line-in end and the movable contact structure is connected to the line-out end, the current can flow from the static contact structure to the movable contact structure. When the static contact structure is connected to the line-out end and the movable contact structure is connected to the line-in end, the current flows from the movable contact structure to the static contact structure.

[0042] When the switching device is closed, the movable contact structure and the fixed contact structure are connected in a surface contact mode. In this contact mode, the contact resistance between the movable contact structure and the fixed contact structure is relatively large, which causes a relatively large temperature rise at the fixed contact structure, and affects the normal operation and performance of the switching device.

[0043] Based on the above, the embodiment of the present application provides a fixed contact structure 100 and a switching device 200, as shown in the drawings, which can reduce the temperature rise at the fixed contact structure 100 and reduce the impact on the operation and performance of the switching device 200. Figure 1

[0044] The fixed contact structure 100 and the switching device 200 provided by the embodiment of the present application will be described in detail below with reference to the drawings.

[0045] Referring to Figure 1 and Figure 2 The present application provides a fixed contact structure 100, which includes a contact sheet 10, a contact point 20, a connecting block 30 and a terminal row 40. The contact point 20 is connected to one side of the contact sheet 10 and is used to cooperate with a movable contact structure 210. The connecting block 30 is connected to the other side of the contact sheet 10 and is spaced apart from the terminal row 40, and the connecting block 30 has electrical conductivity. In the direction from the one side of the contact sheet 10 to the other side of the contact sheet 10, the projection of the connecting block 30 covers the projection of the contact point 20.

[0046] In the embodiment of the present application, the fixed contact structure 100 includes the contact sheet 10, the contact point 20 and the terminal row 40. The contact point 20 and the terminal row 40 are both connected to the contact sheet 10. The fixed contact structure 100 can be contacted or separated from the movable contact structure 210 through the contact point 20, so as to realize the cooperation between the fixed contact structure 100 and the movable contact structure 210, and complete the closing or opening of the switching device 200 carrying the fixed contact structure 100.

[0047] When the contact point 20 is contacted with the movable contact structure 210, a path can be formed between the fixed contact structure 100 and the movable contact structure 210. In the case that the switching device 200 is connected in a circuit, a current can flow between the fixed contact structure 100 and the movable contact structure 210.

[0048] In the present application, the fixed contact structure 100 can specifically connect the circuit through the terminal row 40. In the case that the terminal row 40 is connected to an outgoing line end and the movable contact structure 210 is connected to an incoming line end, the current can flow through the movable contact structure 210, the contact point 20, the contact sheet 10 and the terminal row 40 in sequence. In the case that the terminal row 40 is connected to the incoming line end and the movable contact structure 210 is connected to the outgoing line end, the current can flow through the terminal row 40, the contact sheet 10, the contact point 20 and the movable contact structure 210 in sequence.

[0049] ​Regardless of the way in which the switch device 200 is connected in the circuit, on the side of the static contact structure 100, the current will flow between the contact 20 and the terminal row 40 through the contact piece 10.

[0050] In the embodiment of the present application, the connecting block 30 is also connected on the other side of the contact piece 10, and the projection of the connecting block 30 covers the projection of the contact 20 in the direction from the one side of the contact piece 10 to the other side of the contact piece 10. Since the connecting block 30 is conductive, when the contact 20 contacts the moving contact structure 210, the connecting block 30 can also provide a flow path for the current.

[0051] Thus, between the contact 20 and the terminal row 40, the current can flow at both the contact piece 10 and the connecting block 30. In other words, the provision of the connecting block 30 can make the cross-sectional area of the part between the contact 20 and the terminal row 40 for carrying the current larger, thereby making the carrying capacity of the part larger, making the internal resistance of the part between the contact 20 and the terminal row 40 smaller, and can improve the problem of the temperature rise of the static contact structure 100 being larger, so as to reduce the temperature rise of the switch device 200 provided with the above static contact structure 100, and reduce the possibility of the normal operation and performance of the switch device 200 being affected due to the temperature rise being larger.

[0052] In combination with the foregoing description, since the contact resistance between the contact 20 and the moving contact structure 210 is larger, the temperature rise of the contact piece 10 at the end where the contact 20 is provided is more serious. Therefore, in the present application, the connecting block 30 is provided on the other side of the contact piece 10 and opposite to the contact piece 10, so as to better control the temperature rise of the static contact structure 100 during operation.

[0053] In the embodiment of the present application, the connecting block 30 can have different setting modes, which are specifically described in detail by taking two modes as examples.

[0054] Mode one, as shown in Figure 3 the connecting block 30 and the contact piece 10 are integrally formed.

[0055] Through the above setting, the connecting block 30 and the contact piece 10 can be obtained in one time of manufacturing. Thus, the manufacturing process of forming the connecting block 30 on the contact piece 10 is simplified, and the number of parts of the static contact structure 100 is also reduced, facilitating the assembly of the static contact structure 100.

[0056] Specifically, during manufacturing, the thickness of the part of the contact piece opposite to the position where the contact 20 is to be provided can be made larger. Thus, on the other side of the contact piece 10, there will be a part protruding, and this part of protrusion can form the connecting block 30 to play a role of carrying the current and reducing the temperature rise of the static contact structure 100.

[0057] The thickness direction of the contact piece 10 is the direction from one side of the contact piece 10 to the other side. The thickness of the contact piece 10 is the distance between the opposite ends of the contact piece 10 in the thickness direction thereof.

[0058] In the second mode, as shown in FIG. 2B, the stationary contact structure 100 further includes a fastener 101. The connecting block 30 is provided with a first connecting hole 31, and the contact piece 10 is provided with a second connecting hole. The fastener 101 is arranged in the first connecting hole 31 and the second connecting hole. Figure 2 That is, the connecting block 30 and the contact piece 10 are two separate parts, and the connecting block 30 and the contact piece 10 can be connected by the fastener 101. In this way, the connecting block 30 can also be formed on the contact piece 10, and the connecting block 30 can carry current.

[0059] Specifically, the connecting block 30 can be provided with the first connecting hole 31, and the contact piece 10 can be provided with the second connecting hole. The first connecting hole 31 is opposite to the second connecting hole. In this way, the fastener 101 can be arranged in the first connecting hole 31 and the second connecting hole, thereby achieving the connection of the connecting block 30 and the contact piece 10.

[0060] Specifically, the fastener 101 can be a screw, a bolt, or a pin, and the specific structure of the fastener 101 is not limited herein.

[0061] In addition, the fastener 101 can be made of a metal material. In this way, the fastener 101 also has electrical conductivity, and the fastener 101 can also conduct current, which can facilitate the current to enter the connecting block 30 from the contact piece 10.

[0062] It can be understood that the above-mentioned first mode and second mode are part of the connection mode of the connecting block 30 and the contact piece 10. In addition to the above-mentioned first mode and second mode, other connection modes can also be used. For example, conductive glue can be applied between the connecting block 30 and the contact piece 10, and the connecting block 30 and the contact piece 10 can be connected by adhesion, and the like. The specific connection mode of the connecting block 30 and the contact piece 10 is not limited herein.

[0063] In the case where the connecting block 30 and the contact piece 10 are two separate parts, an intermediate part 50 can also be arranged between the connecting block 30 and the contact piece 10, as shown in FIG. 2C.

[0064] Figure 4 In this way, the intermediate part 50 can also play a role in carrying current.

[0065] Specifically, when the contact 20 contacts the movable contact structure 210, and current flows between the contact 20 and the movable contact structure 210, the current can flow from the contact piece 10 to the connecting block 30 through the intermediate part 50, or can flow from the connecting block 30 to the contact piece 10 through the intermediate part 50.​

[0066] Thus, at the end of the contact piece 10 where the contact point 20 is provided, the current can flow among the contact piece 10, the intermediate part 50 and the connecting block 30, which can also make the current carrying capacity at this point larger and reduce the temperature rise of the stationary contact structure 100.

[0067] In some embodiments, the conductivity of the intermediate part 50 is σ1, the conductivity of the contact piece 10 is σ2, and the conductivity of the connecting block 30 is σ3, satisfying: σ1 < σ2, σ1 < σ3.

[0068] Electrical conductivity is a physical quantity that describes a material's ability to conduct electricity. It represents the current density when the voltage across a conductor of unit length and unit cross-sectional area is 1V. In other words, the higher the conductivity, the better the material's electrical conductivity.

[0069] When the switching device 200 is connected in the circuit, it is usually supplied with alternating current (AC). AC current exhibits the skin effect, meaning that when AC current passes through a conductor, the current tends to flow along the surface of the conductor rather than being uniformly distributed across the entire conductor cross-section.

[0070] Thus, when current flows in the contact 10, the intermediate part 50, and the connecting block 30, the current density is higher on the side of the contact 10 and the side of the connecting block 30, while the current density is lower in the intermediate part 50.

[0071] In this embodiment, the intermediate component 50 has a low electrical conductivity, which is well-suited to the current density at the intermediate component 50. Therefore, the intermediate component 50 can be manufactured using a material with low conductivity, reducing its cost.

[0072] The contact piece 10 and the connecting block 30 can both be made of copper, while the intermediate part 50 can be made of aluminum. Alternatively, the contact piece 10 and the connecting block 30 can both be made of copper, while the intermediate part 50 can be made of brass, etc.

[0073] It should be noted that the intermediate part 50, the contact piece 10, and the connecting block 30 can be made of appropriate materials according to the actual situation. The specific materials of the intermediate part 50, the contact piece 10, and the connecting block 30 are not specifically limited in this embodiment.

[0074] In some embodiments, such as Figure 5 As shown, the connecting block 30 has a first mounting groove 32 on the side facing the contact piece 10, and the contact piece 10 has a second mounting groove 11 on the side facing the connecting block 30. The first mounting groove 32 and the second mounting groove 11 are opposite to and connected to form a mounting space, in which the intermediate part 50 can be placed.

[0075] Through the above arrangement, the intermediate part 50 can be arranged in the mounting space so that the intermediate part 50 is located between the connecting block 30 and the contact piece 10, so that the intermediate part 50 can conduct the part of the current with a smaller current density in the middle.

[0076] According to the foregoing analysis, the current density on the side of the contact piece 10 and the side of the connecting block 30 is large, so the contact piece 10 and the connecting block 30 need to be made of a material with a large electrical conductivity. In the embodiment of the application, the arrangement of the first mounting groove 32 makes the use of the connecting block 30 less, and the arrangement of the second mounting groove 11 makes the use of the contact piece 10 less. Thus, the cost of the contact piece 10 and the connecting block 30 can be reduced while ensuring the current-carrying capacity.

[0077] As a preferred manner, the side of the connecting block 30 facing the contact piece 10 can abut against the side of the contact piece 10 facing the connecting block 30. In this way, the intermediate part 50 is located in the mounting space, which can reduce the possibility that the thickness of the stationary contact structure 100 is large when the intermediate part 50 is arranged, which is not conducive to the installation of the stationary contact structure 100.

[0078] In the embodiment of the application, the connecting block 30 is also connected to the other side of the contact piece 10, and the connecting block 30 can also provide a flow path for the current when the contact 20 contacts the movable contact structure 210. In this way, the arrangement of the connecting block 30 can make the cross-sectional area of the part between the contact 20 and the terminal row 40 for carrying the current larger, thereby making the current-carrying capacity of the part larger and reducing the temperature rise of the switch device 200 carrying the stationary contact structure 100.

[0079] In addition, as shown in Figure 1 and Figure 2 , the application provides a switch device 200 comprising the stationary contact structure 100 of any of the above embodiments.

[0080] In the switch device 200 carrying the stationary contact structure 100, the connecting block 30 is connected to the contact piece 10, and the connecting block 30 can cooperate with the contact piece 10 to jointly provide a flow path for the current, so that the current-carrying capacity of the part between the connecting block 30 and the terminal row 40 for carrying the current is larger, which improves the problem of large temperature rise at the stationary contact structure 100.

[0081] In this way, the temperature rise of the switch device 200 carrying the stationary contact structure 100 can be reduced, and the possibility that the normal operation and performance of the switch device 200 are affected can be reduced.

[0082] It should be noted that in the embodiment of the application, the switch device 200 can be a circuit breaker, a relay or a contactor, etc., which can be provided with the stationary contact structure 100 and the movable contact structure 210. The specific structure of the switch device 200 is not limited in the embodiment of the application.

[0083] In some embodiments, as shown in Figs. 2A and 2B, the switch device 200 can include a housing 201 and a cushion block 202, the static contact structure 100 and the cushion block 202 are arranged in the housing 201, and the contact piece 10 is fixed to the housing 201. The cushion block 202 is arranged between the housing 201 and the connecting block 30, and the cushion block 202 is used to buffer the force transmitted by the contact piece 10 to the housing 201 when the static contact and the movable contact structure 210 are connected. Figure 1 Figure 2 Figure 6

[0084] By the above arrangement, the static contact structure 100 can be arranged in the housing 201, and the housing 201 can protect the static contact structure 100 and reduce the influence of the external environment on the static contact structure 100.

[0085] In the case where the switch device 200 further includes the movable contact structure 210, the movable contact structure 210 can also be arranged in the housing 201 and can move in the housing 201.

[0086] When the movable contact structure 210 moves to close the switch device 200, the movable contact structure 210 will contact the contact point 20. In this process, the movable contact structure 210 will collide with the static contact structure 100, and the force generated by the collision will be transmitted to the housing 201 through the static contact structure 100.

[0087] The movable contact structure 210 needs to contact the contact point 20, so the end of the contact piece 10 where the contact point 20 is arranged will be directly stressed, and the contact point 20 is opposite to the connecting block 30, which makes the force transmitted by the connecting block 30 to the housing 201 larger. Generally, the housing 201 is a plastic part, which makes the strength of the housing 201 slightly lower. Therefore, when the switch device 200 is closed, the force generated by the collision can damage the housing 201.

[0088] In the embodiments of the present application, the cushion block 202 is further arranged between the housing 201 and the connecting block 30, and the cushion block 202 can buffer the force received by the housing 201 between the static contact structure 100 and the housing 201, so as to reduce the possibility of damage to the housing 201 by the force. In this way, the normal work of the switch device 200 can be ensured, and the performance of the switch device 200 can be improved.

[0089] In some embodiments, the cushion block 202 can have heat conductivity, and the cushion block 202 can absorb the heat generated by the connecting block 30.

[0090] When the switch device 200 is closed and the current flows between the static contact structure 100 and the movable contact structure 210, the static contact structure 100 will also heat up under the action of the current.

[0091] ​​​Since the cushion block 202 has heat conductivity, in the case that the static contact structure 100 generates heat, the cushion block 202 can guide the heat of the static contact structure 100 through the connecting block 30. In this way, the problem that the heat of the static contact structure 100 cannot be dissipated or even accumulates can be reduced, and the temperature rise of the static contact structure 100 can be improved.

[0092] In some embodiments, as shown in Figure 1 、 Figure 2 and Figure 6 , the shell 201 is provided with heat dissipation holes 203, the heat dissipation holes 203 pass through the shell 201, and the cushion block 202 covers at least part of the heat dissipation holes 203 in the direction from the cushion block 202 to the contact patch 10. In the case that the cushion block 202 absorbs heat, the cushion block 202 can also transmit the heat to the heat dissipation holes 203.

[0093] In this way, the heat conducted through the cushion block 202 can be dissipated from the shell 201 through the heat dissipation holes 203, which facilitates heat exchange between the switch device 200 and the external environment, and improves the improvement effect on the temperature rise of the switch device 200.

[0094] It should be noted that the number of heat dissipation holes 203 can be multiple, and the multiple heat dissipation holes 203 can be channels for improving heat exchange between the switch device 200 and the external environment. In this way, the heat dissipation effect of the switch device 200 can be further improved.

[0095] The specific number of heat dissipation holes 203 can be 6, 7, 8, 10, 12, etc. The specific number of heat dissipation holes 203 is not limited in the embodiments of the present application. The multiple heat dissipation holes 203 can be arranged in a matrix manner, or can be arranged in a ring shape, etc. The specific arrangement of the heat dissipation holes 203 is not limited in the embodiments of the present application.

[0096] The cushion block 202 can cover all the heat dissipation holes 203, so that the cushion block 202 can transmit more heat to the heat dissipation holes 203 for heat exchange. Alternatively, the cushion block 202 can only cover part of the heat dissipation holes 203. The specific arrangement of the cushion block 202 is not limited in the embodiments of the present application.

[0097] In the embodiments of the present application, the switch device 200 further includes the shell 201 and the cushion block 202, the static contact structure 100 is arranged in the shell 201, and can cooperate with the cushion block 202 and the heat dissipation holes 203 on the shell 201 to further reduce the temperature rise of the switch device 200 when the switch device 200 works, so that the switch device 200 works more reliably.

[0098] Finally, it should be noted that the above embodiments are merely specific embodiments of the present application, and the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A stationary contact structure, co-operable with a movable contact structure, characterised in that The switch device comprises a static contact structure, a movable contact structure and a terminal array. The static contact structure comprises a contact piece, a contact point and a connecting block. The connecting block is integrally formed with the contact piece. The static contact structure further comprises a fastener, the connecting block is provided with a first connecting hole, the contact piece is provided with a second connecting hole, and the fastener is arranged through the first connecting hole and the second connecting hole. The connecting block and the contact piece are further provided with an intermediate part.

2. The stationary contact structure according to claim 1, characterized in that When the contact point contacts the movable contact structure, an electric current flows between the contact point and the movable contact structure.

3. The stationary contact structure of claim 1, characterized in that The electric current can flow from the contact piece to the connecting block through the intermediate part.

4. The stationary contact structure according to claim 3, characterized in that The electrical conductivity of the intermediate part is σ1, the electrical conductivity of the contact piece is σ2, and the electrical conductivity of the connecting block is σ3, satisfying σ1<σ2 and σ1<σ3. The connecting block is provided with a first mounting groove on one side facing the contact piece, and the contact piece is provided with a second mounting groove on one side facing the connecting block.

5. The stationary contact structure according to claim 4, characterized in that The first mounting groove and the second mounting groove are opposite and communicate to form a mounting space, and the intermediate part is arranged in the mounting space.

6. The stationary contact structure of claim 4, characterized in that The switch device comprises the static contact structure according to any one of claims 1-6. The switch device comprises a housing and a pad, the pad and the static contact structure are arranged in the housing, and the contact piece is fixed to the housing.

7. A switching device, characterized by The pad is arranged between the housing and the connecting block, and the pad is used to buffer the force transmitted by the contact piece to the housing when the static contact and the movable contact structure are connected.

8. The switching device of claim 7, wherein The pad has thermal conductivity and can also absorb the heat generated by the connecting block. The housing is provided with a heat dissipation hole penetrating through the housing, and the pad covers at least part of the heat dissipation hole in the direction from the pad to the contact piece.

9. The switching device of claim 8, wherein, In the case that the pad absorbs heat, the pad can also transmit heat to the heat dissipation hole.

10. The switching device of claim 9, wherein ​ ​

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