Contact assembly and power switch

Abstract

The embodiment of the utility model provides a contact assembly and a power switch. The contact assembly comprises a moving contact and a static contact module. The moving contact can be switched between a switching-on position and a switching-off position. The static contact module comprises a static contact and an elastic sheet. The static contact is arranged on one side of the moving contact. The elastic sheet is coupled to the static contact. The elastic sheet comprises a bending part, and a part of the bending part is located on the motion path of the moving contact. And the moving contact can be in contact with the elastic sheet in a range which is separated from the static contact at a preset interval from the closing position. By means of the arrangement, in the high-speed switching-on process of the contact assembly, even if the moving contact bounces relative to the static contact at the switching-on position, the elastic piece can still conduct the moving contact and the static contact, generation of electric arcs can be reduced, the contact can be prevented from being ablated by the electric arcs, and therefore the performance of the contact assembly is improved, and the service life of the contact assembly is prolonged.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of electrical equipment, and more particularly to a contact assembly and a power switch. Background Art

[0002] The clapper-type contact has a compact over-travel design and excellent breaking ability, and is widely used in circuit breakers and transfer switch appliances. The clapper-type contact assembly can quickly and effectively cut off the current when the circuit is disconnected, thus ensuring the safety of the equipment. In some conventional clapper-type contact assemblies, during the high-speed closing process of the contact assembly, the instantaneous contact between the contacts may cause a bouncing phenomenon, and then generate an arc, which may cause ablation damage to the contacts, thereby affecting the performance and service life of the contact assembly. Summary of the Utility Model

[0003] The purpose of the embodiments of the present disclosure is to provide a contact assembly and a power switch to at least partially solve the above problems and other potential problems.

[0004] In a first aspect of the present disclosure, a contact assembly is provided. The contact assembly includes: a moving contact capable of switching between a closed position and an open position; a static contact module including: a static contact disposed on one side of the moving contact; and a spring piece coupled to the static contact, and the spring piece includes a bent portion, and a part of the bent portion is located on the movement path of the moving contact, so that the moving contact contacts the spring piece within a range where the moving contact is separated from the static contact by a predetermined interval when moving from the closed position.

[0005] In some embodiments, the static contact module includes two spring pieces, and the two spring pieces are respectively coupled to opposite sides of the static contact.

[0006] In some embodiments, the two spring pieces are an integrally formed structure by bending, and a protruding portion is provided on the side of each spring piece facing the static contact, and grooves are provided on both opposite sides of the static contact, and the protruding portion is inserted into the groove on the corresponding side.

[0007] In some embodiments, the static contact includes two static contact terminals coupled to each other, and the static contact module includes two spring pieces, and the two spring pieces are respectively coupled to the corresponding static contact terminals on each side.

[0008] In some embodiments, the two spring pieces are disposed outside the two static contact terminals, and the bent portions of the two spring pieces are disposed opposite to each other.

[0009] In some embodiments, the contact assembly further includes: two support members disposed outside the two spring pieces and respectively coupled to the corresponding spring pieces to limit the deformation of the two spring pieces in a direction away from each other.

[0010] In some embodiments, two elastic pieces are disposed between two stationary contact terminals and are respectively coupled to the stationary contact terminals on the corresponding sides, and the bent portions of the two elastic pieces are disposed in opposite directions. One end of the moving contact facing the stationary contact module has a notch into which the two elastic pieces can be inserted.

[0011] In some embodiments, the moving contact includes: two moving contact terminals which are arranged side by side and spaced apart to form a notch between the two moving contact terminals.

[0012] In some embodiments, the stationary contact includes two stationary contact terminals coupled to each other, and the stationary contact module includes two pairs of elastic pieces. A pair of elastic pieces is disposed on opposite sides of each stationary contact terminal, and the two elastic pieces between the two stationary contact terminals abut against each other.

[0013] In some embodiments, each stationary contact terminal is snap - connected to the elastic pieces on the opposite sides.

[0014] In some embodiments, the two elastic pieces on opposite sides of each stationary contact terminal are an integrally formed structure by bending, and a protruding portion is disposed on the side of each elastic piece facing the stationary contact terminal. Grooves are disposed on opposite sides of the stationary contact terminal, and the protruding portion is inserted into the groove on the corresponding side.

[0015] In some embodiments, a contact is disposed on the side of the stationary contact facing the moving contact. Along the extending direction of the stationary contact, the contact is closer to the moving contact than the elastic piece.

[0016] In some embodiments, an inclined surface is disposed at one end of the elastic piece facing the moving contact; wherein when the moving contact is in the open position, the distance between the inclined surface and the moving contact is greater than the safety distance.

[0017] In some embodiments, the stationary contact module further includes: a rotating shaft rotatably coupled to the stationary contact; and an elastic member coupled to the stationary contact on the side of the stationary contact away from the moving contact, and the elastic member is configured to apply a force to the stationary contact to make the stationary contact abut against the moving contact in the closed position.

[0018] The second aspect of the present disclosure provides a power switch. The power switch includes the contact assembly of the first aspect of the present disclosure.

[0019] In an embodiment of the present disclosure, the contact assembly includes a moving contact and a stationary contact module. The moving contact is capable of switching between a closing position and an opening position. The stationary contact module includes a stationary contact and a spring piece. The stationary contact is disposed on one side of the moving contact. The spring piece is coupled to the stationary contact. The spring piece includes a bent portion, and a part of the bent portion is located on the movement path of the moving contact. Within a range where the moving contact is separated from the stationary contact by a predetermined interval from the closing position, the moving contact can contact the spring piece. With this arrangement, during the high-speed closing process of the contact assembly, even if the moving contact bounces with the stationary contact at the closing position, the spring piece can still conduct the moving contact and the stationary contact, which helps to reduce the generation of electric arcs, can avoid ablation of the contacts caused by the electric arcs, and thus improves the performance and service life of the contact assembly.

[0020] It should be understood that the content described in this part is not intended to define the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Combined with the accompanying drawings and referring to the following detailed description, the above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent. In the drawings, the same or similar reference numerals represent the same or similar elements, where:

[0022] Figure 1 A perspective view of the contact assembly according to an embodiment of the present disclosure is shown;

[0023] Figure 2 A front view of the contact assembly according to an embodiment of the present disclosure is shown, where the moving contact is in the opening position;

[0024] Figure 3 A front view of the contact assembly according to an embodiment of the present disclosure is shown, where the moving contact is between the opening position and the closing position;

[0025] Figure 4 A front view of the contact assembly according to an embodiment of the present disclosure is shown, where the moving contact is in the closing position;

[0026] Figure 5 A perspective view of the stationary contact module according to an embodiment of the present disclosure is shown, where the stationary contact includes one stationary contact terminal;

[0027] Figure 6 A schematic diagram showing that two spring pieces of an embodiment of the present disclosure are of an integral structure is shown;

[0028] Figure 7 A schematic diagram showing that support members are disposed outside two spring pieces of an embodiment of the present disclosure is shown, where the stationary contact includes one stationary contact terminal;

[0029] Figure 8Shows a schematic diagram of two static contacts arranged side by side according to an embodiment of the present disclosure;

[0030] Figure 9 Shows a schematic diagram of a support member provided outside two elastic pieces according to an embodiment of the present disclosure, wherein the static contact includes two static contact terminals;

[0031] Figure 10 Shows a perspective view of a moving contact according to an embodiment of the present disclosure, wherein a notch is shown; and

[0032] Figure 11 Shows a perspective view of a contact assembly according to an embodiment of the present disclosure, wherein an elastic member is shown.

[0033] Explanation of reference numerals:

[0034] 100, contact assembly;

[0035] 10, moving contact; 11, notch;

[0036] 20, static contact module; 21, static contact; 210, static contact terminal; 211, groove; 22, elastic piece; 220, bending part; 221, protruding part; 222, inclined surface; 223, connecting part; 23, contact point; 24, rotating shaft; 25, elastic member; 26, support member. Detailed description of the specific implementation

[0037] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] As used herein, the term "including" and its variations mean open inclusion, that is, "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The term "one exemplary embodiment" and "one embodiment" mean "at least one exemplary embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0039] As described above, in some conventional clapper-type contact assemblies, during the high-speed closing process of the contact assembly, the instantaneous contact between the contacts may cause a bouncing phenomenon, which may then generate an arc, which may cause ablation damage to the contacts, thereby affecting the performance and service life of the contact assembly.

[0040] Embodiments of the present disclosure provide a contact assembly and a power switch. In this contact assembly, a shrapnel is mounted on the static contact. The shrapnel includes a bent portion, and part of the bent portion is located on the movement path of the moving contact. Within a range where the moving contact is separated from the static contact by a predetermined interval from the closing position, the moving contact can contact the shrapnel. With this arrangement, during the high-speed closing process of the contact assembly, even if the moving contact bounces off the static contact at the closing position, the shrapnel can still conduct the moving contact and the static contact, helping to reduce the generation of electric arcs and thus avoiding ablation of the contacts caused by the electric arcs. The following will be combined with Figures 1 to 11 to describe the principle of the present disclosure in detail.

[0041] As Figures 1 to 4 shown, the contact assembly 100 includes a moving contact 10 and a static contact module 20. The moving contact 10 can be switched between a closing position and an opening position. When the moving contact 10 is in the closing position, the moving contact 10 can contact the static contact module 20, and a circuit path can be formed to allow current to flow through. When the moving contact 10 moves to the opening position, it separates from the static contact 21, thus cutting off the circuit to prevent current from flowing.

[0042] In some embodiments, the position switching of the moving contact 10 can be controlled by a driving mechanism (such as an electromagnetic mechanism, a spring mechanism, etc.) of the power switch. It should be understood that in other embodiments, the position switching of the moving contact 10 can be performed by other means, and the present disclosure is not intended to be limited thereto.

[0043] As Figures 1 to 4 shown, the static contact module 20 can cooperate with the moving contact 10 to achieve the connection and disconnection of the circuit.

[0044] As Figure 5 shown, the static contact module 20 includes a static contact 21 and a shrapnel 22. The static contact 21 is disposed on one side of the moving contact 10. The shrapnel 22 is an elastic member made of metal and has a certain elasticity and resilience. When the shrapnel 22 contacts the moving contact 10, the shrapnel 22 can also achieve the electrical connection between the moving contact 10 and the static contact 21. A bent portion 220 is provided on the shrapnel 22. For example, by bending, a partial section of the shrapnel 22 is bent to one side to form the bent portion 220. The shrapnel 22 is fixed to the static contact 21, and part of the bent portion 220 on the shrapnel 22 is located on the movement path of the moving contact 10.

[0045] As an example, the shrapnel 22 can be a copper sheet or a stainless steel sheet, and the shrapnel 22 has good elastic deformation ability and electrical conductivity.

[0046] As Figure 2 shown, the moving contact 10 is in the opening position. As Figure 4 shown, the moving contact 10 is in the closing position. AsFigure 3 As shown, the moving contact 10 is between the closed position and the open position. The path that the moving contact 10 passes through between the closed position and the open position is the movement path of the moving contact 10.

[0047] As Figure 5 and Figure 6 shown, the bending portion 220 is located on the side of the elastic piece 22 facing the static contact 21. Within a range where the moving contact 10 is separated from the static contact 21 by a predetermined interval from the closed position, the moving contact 10 can contact the elastic piece 22. Within this range, the moving contact 10 can be electrically connected to the static contact 21 via the elastic piece 22.

[0048] With this arrangement, during the high-speed closing process of the contact assembly 100, even if the moving contact 10 bounces with the static contact at the closed position, the elastic piece 22 can still make the moving contact 10 and the static contact 21 electrically connected, which helps to reduce the generation of electric arcs, can avoid the ablation of the contacts caused by the electric arcs, and thus improves the performance and service life of the contact assembly 100.

[0049] In some embodiments, as Figure 5 shown, the static contact module 20 includes two elastic pieces 22. The two elastic pieces 22 are respectively coupled to opposite sides of the static contact 21, and the bending portions 220 of the two elastic pieces 22 are arranged oppositely.

[0050] As Figure 5 and Figure 6 shown, the ends of the two elastic pieces 22 facing the moving contact 10 are in a horn-shaped structure, which can guide the moving contact 10 to smoothly enter the position between the two elastic pieces 22. When the moving contact 10 moves between the two elastic pieces 22, both sides of the moving contact 10 contact the bending portions 220 of the two elastic pieces 22. With this arrangement, the elastic pieces 22 on both sides can stably contact the moving contact 10, so that the moving contact 10 and the static contact 21 are electrically connected, which helps to reduce the generation of electric arcs.

[0051] In some embodiments, as Figure 6 shown, the two elastic pieces 22 are an integrally formed structure by bending. For example, a metal sheet is bent into three consecutive parts through a bending process, thereby forming two elastic pieces 22 and a connecting portion 223. The middle connecting portion 223 serves as a bridge between the two elastic pieces 22. It can not only fix the positions of the two elastic pieces 22, but also enable each elastic piece 22 to independently perform its own function. In this way, the two elastic pieces 22 and the connecting portion 223 form a double-arm elastic piece structure, which can exhibit good contact performance.

[0052] As Figure 6 and Figure 7As shown in the figure, a protruding portion 221 is provided on one side of each elastic piece 22 facing the static contact 21, and grooves 211 are provided on both opposite sides of the static contact 21. The static contact 21 is arranged between two elastic pieces 22, and the protruding portion 221 can be inserted into the groove 211 on the corresponding side. In this way, the two elastic pieces 22 can be connected to the static contact 21 through the protruding portion 221 and the groove 211. The protruding portion 221 and the groove 211 can not only improve the assembly efficiency of the static contact module 20, but also have high stability.

[0053] As an example, as Figure 5 and Figure 6 shown, the protruding portion 221 is a structure formed by stamping and bending from the elastic piece 22. In this way, manual operation can be reduced and material waste can be reduced, thereby reducing production costs.

[0054] As another example, the elastic piece 22 can also be fixed to the static contact 21 by welding, riveting or threaded connection.

[0055] In some embodiments, as Figure 7 shown, the static contact 21 includes a static contact terminal 210, and two elastic pieces 22 are mounted on the static contact terminal 210. The contact assembly 100 further includes two support members 26. The two support members 26 are arranged outside the two elastic pieces 22. The two support members 26 are respectively coupled to the elastic pieces 22 on the corresponding side, and can limit the deformation of the two elastic pieces 22 in the direction away from each other.

[0056] As Figure 7 shown, when the moving contact 10 switches from the open position to the closed position, the moving contact 10 is inserted between the two elastic pieces 22 and contacts the bending portions 220 of the two elastic pieces 22. When the moving contact 10 contacts the bending portion 220, the elastic piece 22 will deflect outward along the end close to the static contact 21. Support members 26 are arranged outside the two elastic pieces 22, and the stiffness of the support members 26 is relatively large, which can limit the excessive deflection deformation of the elastic piece 22.

[0057] With this arrangement, the distance between the bent portions 220 of the two spring sheets 22 is smaller than the width of the moving contact 10. During the high-speed closing process of the contact assembly 100, the opening between the bent portions 220 of the two spring sheets 22 will be stretched open by the moving contact 10. When the tops of the two spring sheets 22 contact the support member 26, the rigidity of the spring sheets 22 increases under the action of the support member 26, and the deformation is also limited by the support member 26. The distance between the bent portions 220 of the two spring sheets 22 is still slightly smaller than the width of the moving contact 10. During the process of the moving contact 10 continuing to move toward the closing position, the bent portions 220 of the two spring sheets 22 continue to deform elastically. Since the rigidity of the bent portion 220 is relatively large at this time, the bent portion 220 can always maintain close contact with the moving contact 10 during the elastic deformation process, so that the moving contact 10 and the static contact 21 are turned on. The provision of the support member 26 can avoid the bouncing between the moving contact 10 and the spring sheet 22 during high-speed closing, which helps to reduce the generation of arcs.

[0058] In some embodiments, Figure 8 As shown, the stationary contact 21 includes two stationary contact terminals 210 coupled to each other. The stationary contact module 20 includes two springs 22, and the two springs 22 are respectively coupled to the stationary contact terminals 210 on the corresponding sides.

[0059] like Figure 1 and Figure 8 As shown, the stationary contact 21 includes two stationary contact terminals 210. When in contact with the moving contact 10, the two stationary contact terminals 210 can provide a larger contact area, a more uniform current distribution, and can reduce the risk of local overheating, thereby improving the conductivity and reliability of the system. Secondly, by dispersing the current load through the two stationary contact terminals 210, the burden of a single stationary contact terminal 210 can be reduced, and the possibility of wear and ablation of the stationary contact 21 is reduced, thereby extending the service life of the stationary contact 21.

[0060] A spring 22 is installed on each of the two stationary contact terminals 210. When the moving contact 10 moves to the closing position and contacts the two stationary contact terminals 210, the two springs 22 can make the moving contact 10 and the stationary contact 21 conductive, which helps to reduce the generation of arcs and prevent the arcs from ablating the contacts, thereby improving the performance and service life of the contact assembly 100.

[0061] In some embodiments, Figure 8 As shown, the two spring sheets 22 are arranged outside the two stationary contact terminals 210 , and the bent portions 220 of the two spring sheets 22 are arranged opposite to each other.

[0062] like Figure 8As shown, one of the two spring pieces 22 is located at the far left, the other spring piece 22 is located at the far right, and the bent portions 220 of the two spring pieces 22 are both arranged facing the two stationary contact terminals 210. With this arrangement, when the moving contact 10 is switched to the closing position, the leftmost spring piece 22 can abut against the left side of the moving contact 10, and the rightmost spring piece 22 can abut against the right side of the moving contact 10. The spring pieces 22 on the two stationary contact terminals 210 can make the moving contact 10 and the stationary contact 21 conductive, which helps to reduce the generation of arcs, thereby preventing the arcs from ablating the contacts.

[0063] In some embodiments, Figure 9 As shown, two springs 22 are arranged on the outside of the two stationary contact terminals 210. The contact assembly 100 also includes two support members 26. The two support members 26 are arranged on the outside of the two springs 22. The two support members 26 are respectively coupled to the springs 22 on the corresponding sides, and can limit the two springs 22 from deflecting and deforming in a direction away from each other.

[0064] With this arrangement, the distance between the bent portions 220 of the two spring sheets 22 is smaller than the width of the moving contact 10. During the high-speed closing process of the contact assembly 100, the opening between the bent portions 220 of the two spring sheets 22 will be stretched open by the moving contact 10. When the ends of the two spring sheets 22 contact the support member 26, under the action of the support member 26, the rigidity of the spring sheets 22 increases, and the deformation is also limited by the support member 26. The distance between the bent portions 220 of the two spring sheets 22 is still slightly smaller than the width of the moving contact 10. As the moving contact 10 continues to move toward the closing position, the bent portions 220 of the two spring sheets 22 continue to undergo elastic deformation. Since the bending portion 220 of the spring clip 22 has a greater rigidity at this time, the bending portion 220 of the spring clip 22 can always maintain close contact with the moving contact 10, so that the moving contact 10 and the static contact 21 are conductive. The setting of the support member 26 can avoid bouncing between the moving contact 10 and the spring clip 22 during high-speed closing, which helps to reduce the generation of arcs.

[0065] In some embodiments, Figure 8 As shown, two spring pieces 22 are disposed between two stationary contact terminals 210 and are respectively coupled to the stationary contact terminals 210 on the corresponding sides.

[0066] like Figure 8 As shown, the stationary contact module 20 includes two stationary contact terminals 210 and two springs 22. Here, the two springs 22 are arranged between the two stationary contact terminals 210, and the two outer springs 22 are not required. The bending parts 220 of the two springs 22 are arranged in opposite directions. At the same time, a notch 11 is provided at one end of the moving contact 10 facing the stationary contact module 20, and the notch 11 can be inserted into the two springs 22 between the two stationary contact terminals 210.

[0067] In some embodiments, as Figure 8 shown, the distance between the ends of the two elastic pieces 22 facing the moving contact 10 is less than the distance between the two bending portions 220. The ends of the two elastic pieces 22 can guide the two elastic pieces 22 to be inserted into the notch 11.

[0068] During the movement of the moving contact 10 to the closing position, the ends of the two elastic pieces 22 facing the moving contact 10 abut against each other under the action of the notch 11. At this time, the distance between the bending portions 220 of the two elastic pieces 22 is still greater than the width of the notch 11. When the moving contact 10 continues to move towards the closing position, the bending portions 220 of the two elastic pieces 22 are deformed to adapt to the width of the notch 11. When the bending portions 220 undergo elastic deformation, since the ends of the two elastic pieces 22 abut against each other, the deformation of the ends of the two elastic pieces 22 is restricted by each other, and the stiffness of the two mutually abutting bending portions 220 becomes larger. Therefore, they can closely abut against the inner wall of the notch 11. This mutually abutting structure restricts the deformation of the elastic pieces 22, and can avoid the bounce between the moving contact 10 and the elastic pieces 22 during high-speed closing, which helps to improve the contact performance between the elastic pieces 22 and the moving contact 10.

[0069] In some embodiments, as Figure 10 shown, the moving contact 10 includes a moving contact terminal, and a notch 11 can be machined at the end of the moving contact terminal.

[0070] In other embodiments, the moving contact 10 includes two moving contact terminals coupled to each other. The two moving contact terminals are arranged in parallel and spaced apart, so as to form a notch 11 between the two moving contact terminals. With this arrangement, it is not necessary to additionally machine a notch 11 on the moving contact 10. During use, the distance between the two moving contact terminals can be adjusted as needed, so as to adjust the width of the notch 11.

[0071] In some embodiments, as Figure 8 shown, the static contact 21 includes two static contact terminals 210 coupled to each other. A pair of elastic pieces 22 are arranged on opposite sides of each static contact terminal 210. That is to say, the static contact module 20 includes two pairs of elastic pieces 22.

[0072] As Figure 8 shown, a notch 11 is provided at the end of the moving contact 10 facing the static contact module 20. When the moving contact 10 moves to the closing position, the bending portions 220 of the two elastic pieces 22 outside the two static contact terminals 210 can abut against the opposite sides of the moving contact 10. With this arrangement, during the movement of the moving contact 10 towards the closing position, the bending portions 220 of the two elastic pieces 22 between the two static contact terminals 210 can abut against the side walls of the notch 11. The bending portions 220 of the two elastic pieces 22 outside the two static contact terminals 210 can conduct electricity with the outer circuit of the moving contact 10.

[0073] Under the action of the notch 11, one ends of the two elastic pieces 22 between the two static contact terminals 210 that face the moving contact 10 abut against each other. At this time, the distance between the bent portions 220 of the two elastic pieces 22 is greater than the width of the notch 11. When the moving contact 10 continues to move towards the closing position, the bent portions 220 of the two elastic pieces 22 are deformed to adapt to the width of the notch 11. When the bent portions 220 are deformed, since the ends of the two elastic pieces 22 abut against each other, the deformations of the ends of the two elastic pieces 22 are restricted by each other, and the stiffness of the two mutually abutting bent portions 220 becomes larger. Therefore, they can closely abut against the inner wall of the notch 11. This mutually abutting structure restricts the deformation of the elastic pieces 22, and can avoid the bounce between the moving contact 10 and the elastic pieces 22 during high-speed closing, which helps to improve the contact performance between the elastic pieces 22 and the moving contact 10.

[0074] In some embodiments, such as Figure 8 and Figure 9 shown, each static contact terminal 210 is snap-connected to the elastic pieces 22 on the opposite sides. With this arrangement, not only can the assembly efficiency of the static contact module 20 be improved, but also it has high stability.

[0075] In some embodiments, such as Figure 8 and Figure 9 shown, the two elastic pieces 22 are an integrally formed structure by bending. For example, a metal sheet is bent into three continuous parts through a bending process, thereby forming two elastic pieces 22 and a connecting portion 223. The middle connecting portion 223 serves as a bridge between the two elastic pieces 22. It can not only fix the positions of the two elastic pieces 22, but also enable each elastic piece 22 to independently perform its own function. In this way, the two elastic pieces 22 and the connecting portion 223 form a double-arm elastic piece structure, which can exhibit good contact performance.

[0076] As Figure 8 and Figure 9 shown, on the side of each elastic piece 22 that faces the static contact 21, a protruding portion 221 is provided, and grooves 211 are provided on both opposite sides of the static contact 21. When the static contact 21 is arranged between the two elastic pieces 22, the protruding portion 221 can be inserted into the corresponding groove 211 on the side. With this arrangement, the two elastic pieces 22 can be connected to the static contact 21 through the protruding portion 221 and the groove 211. The protruding portion 221 and the groove 211 can not only improve the assembly efficiency of the static contact module 20, but also have high stability.

[0077] As an example, such as Figure 8 and Figure 9As shown, the protrusion 221 can be a structure formed by stamping and bending from the elastic piece 22. In this way, since stamping and bending can achieve automated mass production, the need for manual operation can be reduced and material waste can be reduced, thereby reducing production costs.

[0078] In some embodiments, as Figures 1 to 4 shown, a contact 23 is provided on the side of the static contact 21 facing the moving contact 10. Along the extending direction of the static contact 21, the contact 23 is closer to the moving contact 10 than the elastic piece 22.

[0079] As Figures 1 to 4 shown, the height of the elastic piece 22 is greater than the height of the contact 23. Setting the elastic piece 22 at a position farther from the moving contact 10 than the contact 23 can increase the distance between the elastic piece 22 and the moving contact 10. When the moving contact 10 is in the open position, the moving contact 10 is inclined relative to the static contact 21. The farther the distance between the elastic piece 22 and the moving contact 10, the greater the distance between the end of the elastic piece 22 and the moving contact 10, thus ensuring that the requirement of the disconnection gap between the elastic piece 22 and the moving contact 10 is met. In the case of high voltage or large current, no arc reignition will occur between the elastic piece 22 and the moving contact 10, thus ensuring the safe operation of the electrical equipment and the personal safety of the operator.

[0080] In some embodiments, as Figures 1 to 5 shown, an inclined surface 222 is provided at one end of the elastic piece 22 facing the moving contact 10. When the moving contact 10 is in the open position, the distance D between the inclined surface 222 and the moving contact 10 is greater than the safety distance.

[0081] As Figure 2 shown, when the moving contact 10 is in the open position, there is a first included angle between the extending direction of the moving contact 10 and the extending direction of the static contact 21, and there is a second included angle between the inclined surface 222 and the extending direction of the static contact 21. In some embodiments, the first included angle and the second included angle can be the same, that is, the extending direction of the moving contact 10 is parallel to the inclined surface 222 of the elastic piece 22. With this arrangement, the distance D between any position of the inclined surface 222 of the elastic piece 22 and the moving contact 10 is the same and greater than the safety distance, thus avoiding the generation of arc between the moving contact 10 and the inclined surface 222 of the elastic piece 22.

[0082] In some embodiments, as Figure 11As shown, the static contact module 20 further includes a rotating shaft 24 and an elastic member 25. The static contact 21 is rotatably connected to the rotating shaft 24, thereby allowing the static contact 21 to rotate around the axis of the rotating shaft 24. The elastic member 25 is coupled to the static contact 21 on the side of the static contact 21 away from the moving contact 10. When the moving contact 10 switches between the closed position and the open position, the elastic member 25 does not affect the movement of the moving contact 10. The elastic member 25 is configured to apply a force to the static contact 21 that causes the static contact 21 to abut against the moving contact 10 in the closed position. When the moving contact 10 moves to the closed position, the static contact 21 can closely fit the moving contact 10 under the action of the elastic member 25, thereby forming a reliable electrical connection.

[0083] With this arrangement, the elastic member 25 not only enhances the stability of the contact between the moving contact 10 and the static contact 21, but also reduces the occurrence of electric arcs, thereby improving the performance and safety of the power switch.

[0084] The second aspect of the present disclosure provides a power switch. The power switch includes the contact assembly 100 of the first aspect of the present disclosure.

[0085] In the contact assembly 100 of the power switch, the moving contact 10 can switch between the closed position and the open position. The static contact module 20 includes a static contact 21 and a spring piece 22. The static contact 21 is disposed on one side of the moving contact 10. The spring piece 22 is coupled to the static contact 21. The spring piece 22 includes a bent portion 220, and a part of the bent portion 220 is located on the movement path of the moving contact 10. Within a range of separating a predetermined interval from the static contact in the closed position, the moving contact can contact the spring piece. With this arrangement, during the high-speed closing process of the contact assembly, even if the moving contact bounces with the static contact at the closed position, the spring piece can still conduct the moving contact and the static contact, which helps to reduce the generation of electric arcs and can avoid ablation of the contacts by the electric arcs, thereby improving the performance and service life of the contact assembly.

[0086] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A contact assembly (100), characterized in that: include: A moving contact (10) capable of switching between a closed position and an open position; The stationary contact module (20) comprises: A stationary contact (21) is arranged on one side of the moving contact (10); as well as A spring piece (22) is coupled to the stationary contact (21), and the spring piece (22) includes a bent portion (220), and a portion of the bent portion (220) is located on the movement path of the moving contact (10), so that the moving contact (10) contacts the spring piece (22) within a range of a predetermined interval from the closed position to the stationary contact (21).

2. The contact assembly (100) according to claim 1, characterized in that: The stationary contact module (20) comprises two spring sheets (22), and the two spring sheets (22) are respectively coupled to opposite sides of the stationary contact (21).

3. The contact assembly (100) according to claim 2, characterized in that: The two spring sheets (22) are an integral structure formed by bending, and a protrusion (221) is provided on the side of each spring sheet (22) facing the stationary contact (21), and grooves (211) are provided on the opposite sides of the stationary contact (21), and the protrusion (221) is inserted into the groove (211) on the corresponding side.

4. The contact assembly (100) according to claim 1, characterized in that: The stationary contact (21) comprises two stationary contact terminals (210) coupled to each other, and the stationary contact module (20) comprises two spring sheets (22), and the two spring sheets (22) are respectively coupled to the stationary contact terminals (210) on corresponding sides.

5. The contact assembly (100) according to claim 4, characterized in that: The two spring sheets (22) are arranged outside the two stationary contact terminals (210), and the bent portions (220) of the two spring sheets (22) are arranged opposite to each other.

6. The contact assembly (100) according to claim 2 or 5, characterized in that: Also includes: Two support members (26) are arranged on the outsides of the two elastic sheets (22) and are respectively coupled to the elastic sheets (22) on the corresponding sides so as to limit the two elastic sheets (22) from deforming in a direction away from each other.

7. The contact assembly (100) according to claim 4, characterized in that: The two spring sheets (22) are arranged between the two stationary contact terminals (210) and are respectively coupled to the stationary contact terminals (210) on the corresponding sides, and the bent portions (220) of the two spring sheets (22) are arranged in opposite directions. The end of the moving contact (10) facing the stationary contact module (20) has a notch (11), and the notch (11) can allow the two spring sheets (22) to be inserted.

8. The contact assembly (100) according to claim 7, characterized in that: The moving contact (10) comprises: Two moving contact terminals are arranged in parallel and spaced apart to form the notch (11) between the two moving contact terminals.

9. The contact assembly (100) according to claim 1, characterized in that: The stationary contact (21) comprises two stationary contact terminals (210) coupled to each other, and the stationary contact module (20) comprises two pairs of spring sheets (22), a pair of spring sheets (22) are arranged on opposite sides of each stationary contact terminal (210), and the two spring sheets (22) between the two stationary contact terminals (210) abut against each other.

10. The contact assembly (100) according to claim 9, characterized in that: Each of the stationary contact terminals (210) is snap-connected to the spring sheets (22) on two opposite sides.

11. The contact assembly (100) according to claim 10, characterized in that: The two spring sheets (22) on opposite sides of each stationary contact terminal (210) are an integrated structure formed by bending, and a protrusion (221) is provided on the side of each spring sheet (22) facing the stationary contact terminal (210), and grooves (211) are provided on opposite sides of the stationary contact terminal (210), and the protrusions (221) are inserted into the grooves (211) on the corresponding sides.

12. The contact assembly (100) according to any one of claims 1 to 5 and 7 to 11, characterized in that: A contact point (23) is provided on the side of the stationary contact (21) facing the moving contact (10), wherein along the extension direction of the stationary contact (21), the contact point (23) is closer to the moving contact (10) than the spring sheet (22).

13. The contact assembly (100) according to claim 12, characterized in that: An inclined surface (222) is provided at one end of the spring piece (22) facing the moving contact (10); When the moving contact (10) is in the opening position, the distance between the inclined surface (222) and the moving contact (10) is greater than the safety distance.

14. The contact assembly (100) according to any one of claims 1 to 5, 7 to 11 and 13, characterized in that: The stationary contact module (20) further comprises: A rotating shaft (24) rotatably coupled to the stationary contact (21); and An elastic member (25) is coupled to the static contact (21) at a side of the static contact (21) away from the moving contact (10), and the elastic member (25) is configured to apply a force to the static contact (21) so that the static contact (21) abuts against the moving contact in the closed position.

15. A power switch, characterized in that: include: The contact assembly (100) according to any one of claims 1 to 14.

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