Bridge switch and relay

Abstract

The invention provides a bridge switch and a relay. The bridge switch comprises two static contacts and a bridge moving contact. Each static contact is provided with a first static contact and a second static contact at an interval; the bridge type movable contact comprises a rigid overcurrent bridge and a flexible overcurrent bridge, the rigid overcurrent bridge is provided with a first movable contact corresponding to the first static contacts of the two static contacts, and when the bridge type movable contact is disconnected from the two static contacts, the distance between the second movable contact and the second static contact is smaller than the distance between the first movable contact and the first static contact; the flexible over-current bridge is provided with an elastic deformation part, and is provided with a second movable contact corresponding to the second static contacts of the two static contact members, and the second movable contact is arranged at the elastic deformation part. The relay comprises the bridge switch. When the contact is applied, the contact resistance is small, the temperature rise is low, the contact loss is small, and the contact service life is longer.

Description

Technical Field

[0001] The present invention relates to the field of relays, and particularly to a bridge switch and a relay. Background Art

[0002] A relay includes a fixed part and a moving part. The fixed part includes a static contact member provided with a static contact point. The moving part includes an armature and a moving contact assembly fixedly connected to the armature. The moving contact assembly is provided with a moving contact point corresponding to the static contact point. When the coil is not energized, the moving part remains at a position where the moving contact point and the static contact point are disconnected. After the coil is energized, the armature is attracted by the iron core to drive the moving contact assembly to act so that the moving contact point and the static contact point are closed. When such a relay is applied to a high-current environment, there are problems of large contact resistance and high temperature rise, which affect the contact life. Summary of the Invention

[0003] The object of the present invention is to overcome the above-mentioned defects or problems in the background art, and provide a bridge switch and a relay with small contact resistance, low temperature rise, and longer contact life.

[0004] To achieve the above object, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical solution one and its preferred embodiments provide a bridge switch, which includes two static contact members and a bridge moving contact member; each static contact member is provided with a first static contact point and a second static contact point at intervals; the bridge moving contact member includes a rigid current-carrying bridge and a flexible current-carrying bridge. The rigid current-carrying bridge is provided with a first moving contact point corresponding to the first static contact points of the two static contact members; when the bridge moving contact member is disconnected from the two static contact members, the distance between the second moving contact point and the second static contact point is smaller than the distance between the first moving contact point and the first static contact point; the flexible current-carrying bridge is provided with an elastic deformation part and is provided with a second moving contact point corresponding to the second static contact points of the two static contact members, and the second moving contact point is arranged on the elastic deformation part.

[0006] Based on technical solution one, there is also technical solution two. In technical solution two and its preferred embodiments, the current-carrying cross-sectional area of the rigid current-carrying bridge is larger than that of the flexible current-carrying bridge, and / or the conductivity of the rigid current-carrying bridge is greater than that of the flexible current-carrying bridge.

[0007] Based on technical solution one, there is also technical solution three. In technical solution three and its preferred embodiments, the number of the elastic deformation parts corresponds to the number of the second moving contact points; each elastic deformation part is provided with a first connection end and a second connection end. The second connection end is fixedly connected to the second moving contact point, and there is a non-linear elastic deformation path between the second connection end and the first connection end.

[0008] Based on Technical Solution Three, there is also provided Technical Solution Four. In Technical Solution Four and its preferred embodiments, the elastic deformation part forms a non-linear elastic deformation path through at least two bends.

[0009] Based on any one of Technical Solutions One to Four, there is also provided Technical Solution Five. In Technical Solution Five and its preferred embodiments, the elastic deformation part is provided with a bent section, the bent section is arranged on the deformation transmission path of the elastic deformation part, and the bent section is adapted to unfold when the bridge-type moving contact and the static contact are closed.

[0010] Based on Technical Solution Four, there is also provided Technical Solution Six. In Technical Solution Six and its preferred embodiments, the elastic deformation part is provided with a first arm, a second arm and a third arm connected in sequence, and the extending direction of the second arm intersects with the extending directions of the first arm and the third arm; the second connection end is arranged on the first arm, and the first connection end is arranged on the third arm.

[0011] Based on Technical Solution Six, there is also provided Technical Solution Seven. In Technical Solution Seven and its preferred embodiments, the first arm and / or the second arm is provided with a bent section, and the bent section is a continuous reverse bend twice so that a part of the first arm and / or the second arm extends in a Z shape, and the bent section is adapted to unfold when the bridge-type moving contact and the static contact are closed.

[0012] Based on Technical Solution Six or Seven, there is also provided Technical Solution Eight. In Technical Solution Eight and its preferred embodiments, the first static contacts are arranged at intervals along a first direction, and the second static contacts are respectively located on both sides of each first static contact along the first direction; the first arm and the rigid current-carrying bridge are arranged at intervals along the first direction; the extending direction of the first arm intersects with the first direction.

[0013] Based on Technical Solution Eight, there is also provided Technical Solution Nine. In Technical Solution Nine and its preferred embodiments, the number of elastic deformation parts is two; the flexible current-carrying bridge is further provided with a bridging part, the bridging part is integrally connected with the third arms of the two elastic deformation parts, and the bridging part is fixedly connected with the rigid current-carrying bridge through a first moving contact.

[0014] Based on Technical Solution Nine, there is also provided Technical Solution Ten. In Technical Solution Ten and its preferred embodiments, the first moving contact and the second moving contact are respectively adapted to be closed or disconnected from the first static contact and the second static contact along a second direction; the first arm and the third arm both extend along a third direction; the second arm extends along the first direction; the first direction, the second direction and the third direction are orthogonal.

[0015] Based on Technical Solution Ten, there is also Technical Solution Eleven. In Technical Solution Eleven and its preferred embodiments, the bridging portion extends along the first direction, and the third arms of the two elastic deformation portions are integrally connected to the two ends on the same side of the bridging portion along the third direction; a widened section is provided at one end of the first arm away from the second arm, and the widened section is fixedly connected to the second moving contact.

[0016] Based on Technical Solution Ten, there is also Technical Solution Twelve. In Technical Solution Twelve and its preferred embodiments, the third arms of the two elastic deformation portions are integrally connected, and the second arms of the two elastic deformation portions are integrally connected.

[0017] Based on Technical Solution Twelve, there is also Technical Solution Thirteen. In Technical Solution Thirteen and its preferred embodiments, the bridging portion extends along the first direction, and the third arms of the two elastic deformation portions are both integrally connected to the middle portion of the bridging portion along the first direction. Protruding portions protruding towards the second arm are respectively provided at both ends of the bridging portion along the first direction, and the protruding portions are fixedly connected to the first moving contact.

[0018] Technical Solution Fourteen and its related embodiments provide a relay, including a moving reed and the bridge switch according to any one of Technical Solutions One to Eleven, and the moving reed is fixedly connected to both the rigid current-carrying bridge and the flexible current-carrying bridge of the bridge moving contact member.

[0019] Based on Technical Solution Fourteen, there is also Technical Solution Fifteen. In Technical Solution Fifteen and its preferred embodiments, an armature is further included, the armature is connected to the moving reed and is adapted to drive the bridge moving contact member to swing, and the bridge moving contact member and the armature are spaced apart in a direction perpendicular to the contact closing direction and the layout direction of each static contact.

[0020] Based on Technical Solution Fourteen, there is also Technical Solution Sixteen. In Technical Solution Sixteen and its preferred embodiments, the flexible current-carrying bridge is further provided with a bridging portion, and the bridging portion and the rigid current-carrying bridge are fixed to the moving reed through the first moving contact.

[0021] Technical Solution Seventeen and its preferred embodiments provide a relay, including a moving reed and the bridge switch according to any one of Technical Solutions Twelve to Thirteen, and the moving reed is fixedly connected to both the rigid current-carrying bridge and the flexible current-carrying bridge of the bridge moving contact member.

[0022] Based on Technical Solution Seventeen, there is also Technical Solution Eighteen. In Technical Solution Eighteen and its preferred embodiments, the armature is connected to the moving reed and is adapted to drive the bridge moving contact member to swing; the rigid current-carrying bridge and the armature are spaced apart along the third direction, and the second arm and the armature at least partially overlap along the third direction in the projection plane perpendicular to the second direction.

[0023] Based on Technical Solution 18, there is also Technical Solution 19. In Technical Solution 19 and its preferred embodiments, the armature is provided with a convex bud fixedly connected to the moving reed, and the second arm is further provided with a relief hole for avoiding the convex bud.

[0024] Based on Technical Solution 17, there is also Technical Solution 20. In Technical Solution 20 and its preferred embodiments, the flexible current-carrying bridge is further provided with a bridging portion, and the bridging portion and the rigid current-carrying bridge are fixed to the moving reed through the first moving contact.

[0025] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solutions and their preferred embodiments of the present invention have the following beneficial effects due to the following technical means:

[0026] In Technical Solution 1 and its related embodiments, the flexible current-carrying bridge has conductivity and elasticity, including both an integral structure and a split structure. If the split structure is adopted, it is necessary to ensure that the split connection does not affect the free deformation of the elastic deformation part and keeps the conductive path continuous.

[0027] When the bridge-type moving contact and the static contact are closed, the first moving contacts and the second moving contacts are in parallel, and the first moving contacts are in series. The contact resistance is small, the heat generation of the contacts is small, the temperature rise is reduced, the contact loss is reduced, and the contact life is prolonged.

[0028] In this technical solution, in the open state, the distance between the second moving contact and the second static contact is less than the distance between the first moving contact and the first static contact. Therefore, when the bridge-type moving contact member and the static contact member are closed, the second moving contact of the flexible current-carrying bridge first contacts and first conducts current; when the bridge-type moving contact member and the static contact member are opened, the second moving contact of the flexible current-carrying bridge disconnects later. When disconnecting, an arc will be generated between the second moving contact and the second static contact. However, since the first static contact and the second static contact are arranged at intervals, the arc generated when the second moving contact and the second static contact are disconnected is not likely to affect the first moving contact and the first static contact, thus ensuring the cleanliness of the surface of the first static contact, reducing the contact resistance between the first static contact and the first moving contact. Since the elastic deformation part deforms during the contact or disconnection process, it is easy to drive the second moving contact to move relative to the second static contact and rub the oxide on the surface of the second static contact or carbide generated after cleaning the arc ablation. The cleaning effect of the contact surface is good. Therefore, setting the second moving contact on the elastic deformation part can improve the cleaning effect on the surface of the second static contact and reduce the contact resistance between the second moving contact and the second static contact. Thus, between each moving contact and the corresponding static contact, there is a lower contact resistance due to the higher cleanliness of the surface of the corresponding static contact. This setting also enables the rigid current-carrying bridge to carry the main current. Since the resistance of the rigid current-carrying bridge is generally less than that of the flexible current-carrying bridge, the heat generation of the entire bridge-type moving contact member is low, the temperature rise is low, avoiding the problem that when the temperature of the bridge-type moving contact member is too high, it affects the deformation of the elastic deformation part and then leads to too high contact resistance between the second moving contact and the second static contact. That is, the contact resistance between the second moving contact and the second static contact is reduced. At the same time, due to the setting of the rigid current-carrying bridge, the contact between the first moving contact and the first static contact is stable and the contact resistance is small. Therefore, the service life of each contact is extended.

[0029] In addition, if the second moving contact is set on a non-elastic structure, the processing accuracy requirements for the flexible current-carrying bridge are relatively high. Otherwise, it is very likely that some moving contacts are connected and some moving contacts are not connected, unable to ensure the effect of parallel connection and reducing the contact resistance. In this technical solution, the second moving contact is set on the elastic deformation part. The second moving contact of the flexible current-carrying bridge first contacts and first conducts current. The elastic deformation part generates a deformation perpendicular to the contact surface of the contact, providing contact pressure, reducing the contact resistance between the second moving contact and the second static contact, and enabling the second moving contact to move relative to the second static contact and rub the oxide on the surface of the second static contact or carbide generated after cleaning the arc ablation. The cleaning effect of the contact surface is good, which is more conducive to ensuring the shunt of the second moving contact and the effect of reducing the contact resistance on the basis of the connection between the second moving contact and the second static contact, thus ensuring the shunt of the second moving contact and the effect of reducing the contact resistance.

[0030] In Technical Solution 2 and its preferred embodiments, when the cross-sectional area of the rigid current-carrying bridge is larger than that of the flexible current-carrying bridge, the current-carrying capacity of the rigid current-carrying bridge can be improved, the current density can be reduced, the resistance of the rigid current-carrying bridge can be decreased, the heat generation of the entire bridge-type moving contact can be reduced, and the contact resistance between the second moving contact and the second static contact can be minimized. In addition, since the cross-sectional area of the flexible current-carrying bridge is smaller, it can have better elasticity, so that the second moving contact has a better cleaning effect during the disconnection or closing process with the second static contact. When the conductivity of the rigid current-carrying bridge is greater than that of the flexible current-carrying bridge, a material with higher conductivity can be selected for the rigid current-carrying bridge compared to the flexible current-carrying bridge. Because in the prior art, in order to ensure the flexibility of the conductive material, other elements are usually doped into the conductive material, but the conductivity of the conductive material will decrease after doping, the current-carrying capacity will decline, and problems such as temperature rise will follow. The rigid current-carrying bridge can be undoped and thus has a higher current-carrying capacity. Therefore, the rigid current-carrying bridge has a higher current-carrying capacity and a lower resistance compared to the flexible current-carrying bridge, which is more conducive to reducing the heat generation of the entire bridge-type moving contact, thereby reducing the contact resistance between the second moving contact and the second static contact.

[0031] In Technical Solution 3 and its preferred embodiments, the number of elastic deformation parts corresponds to the number of second moving contacts, which can avoid uneven pressure caused by a single elastic deformation part driving multiple second moving contacts and reduce the overall contact resistance. The non-linear elastic deformation path means that the physical path of the elastic deformation part is a non-linear shape, such as a wavy shape, a spiral shape, or a multi-segment bent structure. Compared with a linear path, the non-linear elastic deformation path can increase the effective deformation length, improve the elastic deformation ability, make the displacement of the second moving contact larger and have multi-directional deformation, so that the rubbing range between the second moving contact and the second static contact is larger, and the cleaning effect of the contact surface is better, which is more conducive to reducing the contact resistance between the second moving contact and the second static contact.

[0032] In Technical Solution 4 and its preferred embodiments, the number and angle of the bends can adjust the stiffness and deformation amount of the elastic deformation part, optimize the displacement trajectory of the second moving contact, and enhance the contact cleaning effect.

[0033] In Technical Solution 5 and its preferred embodiments, when the bent section unfolds during closing, it releases elastic potential energy, which can provide an additional contact pressure to the second moving contact, reducing the contact resistance between the second moving contact and the second static contact. In addition, during the unfolding process of the bent section, it will also drive the displacement of the second moving contact, further enhancing the friction cleaning effect between the second moving contact and the second static contact.

[0034] In Technical Solution Six and its preferred embodiments, the differences in the extending directions of the first arm, the second arm, and the third arm cause the elastic deformation portion to form two bends, and cause the elastic deformation portion to generate compound deformation when stressed, enhancing the displacement flexibility of the second moving contact. In addition, the structures of the first arm, the second arm, and the third arm form a continuous arm structure, which is more conducive to dispersing the deformation stress. This structure also enables the second moving contact to displace in at least two directions of the extending direction of the first arm and the extending direction of the second arm, which is more conducive to the large-range rubbing of the second moving contact against the second static contact, enhancing the cleaning effect between the contacts.

[0035] In Technical Solution Seven and its preferred embodiments, the first arm and / or the second arm are provided with a bent section. The bent section unfolds when closed to release elastic potential energy, which can provide an additional contact pressure to the second moving contact, reducing the contact resistance between the second moving contact and the second static contact. In addition, the second moving contact will be displaced during the unfolding process of the bent section, further enhancing the friction cleaning effect between the second moving contact and the second static contact. Among them, the Z-shaped structure of the first arm and / or the second arm releases greater elastic potential energy when unfolding, further providing a stable contact pressure to the second moving contact and reducing the contact resistance between the second moving contact and the second static contact. When the bent section is provided on the first arm, the bent section is located on the deformation transmission path of the first arm. When the bridge-type moving contact and the static contact are closed, the bent section unfolds to directly apply a contact pressure to the second moving contact, the contact pressure of the second moving contact is greater, the contact between the second moving contact and the second static contact is more stable, and the contact resistance is smaller. When the bent section is provided on the second arm, the second arm connects the first arm and the third arm. When the bent section of the second arm unfolds, it is easy to drive the second moving contact to displace along the extending direction of the second arm, which is more conducive to the displacement of the second moving contact in at least two directions of the extending direction of the first arm and the extending direction of the second arm, and is more conducive to the large-range rubbing of the second moving contact against the second static contact, enhancing the cleaning effect between the contacts.

[0036] In Technical Solution VIII and its preferred embodiments, the first static contacts are arranged at intervals along the first direction, and the second static contacts are respectively located on both sides of each first static contact along the first direction. On the one hand, compared with the second static contacts of two static contact members being close to each other, the arc attraction or interference between the second static contacts can be reduced, improving the arc extinguishing effect. On the other hand, it also enables the elastic deformation part fixed to the second moving contact to have a larger deformation space, so that the second moving contact has a larger rubbing range with respect to the second static contact during movement, achieving a better cleaning effect and further reducing the contact resistance between the second moving contact and the second static contact. The first arm and the rigid current-carrying bridge are arranged at intervals along the first direction, and the extending direction of the first arm intersects with the first direction. Therefore, the first arm and the second moving contact have a movement component along the first direction. Since the second moving contact also has a movement component along the extending direction of the first arm, and the extending direction of the first arm intersects with the first direction, the second moving contact has movement components in at least two directions during the closing or opening process with the second static contact. During the closing process, multiple-directional frictional rubbing is formed between the second moving contact and the second static contact. In addition, frictional rubbing is also formed between the first moving contact and the first static contact. The frictional rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation. The cleaning effect of the contact surface is good, further reducing the contact resistance and the temperature rise.

[0037] In Technical Solution IX and its preferred embodiments, the flexible current-carrying bridge is further provided with a bridging portion, and the bridging portion is integrally connected to the third arms of the two elastic deformation parts, so that the flexible current-carrying bridge forms an integrated framework, and the manufacturing process is simpler; the bridging portion and the rigid current-carrying bridge are fixedly connected through the first moving contact. On the one hand, the bridging portion and the rigid current-carrying bridge form a parallel current path, reducing the local temperature rise. On the other hand, only the bridging portion of the flexible current-carrying bridge needs to be connected to the rigid current-carrying bridge. Compared with the two bridging portions being respectively connected to the rigid current-carrying bridge, the installation steps are fewer, the structure is more compact, and the fixed support of the rigid current-carrying bridge enhances the overall structural stability of the bridge-type moving contact member, which is beneficial to resisting the impact during the contact of the static and moving contacts. In addition, the two elastic deformation parts are linked with the rigid current-carrying bridge through the bridging portion, which is beneficial to evenly distributing the contact pressure of the second moving contact on the second static contact during the contact process between the first moving contact and the first static contact.

[0038] In Technical Solution Ten and its preferred embodiments, the first arm and the third arm extend along the third direction, and the second arm extends along the first direction. "Extend" means that when there is no external force acting on the arm, the natural stretching main trajectory of the arm extends along a specific direction, but local bending (such as wavy or bent segments) is allowed. Even when the arm deforms and bends locally, the main direction in its static undeformed state still extends along the specific direction, ensuring the controllability of deformation and the predictability of the movement trajectory. In this technical solution, both the first moving contact and the second moving contact are closed with the corresponding static contacts along the second direction. The structures of the first arm, the second arm, and the third arm form a U-shaped continuous arm structure. The U-shaped continuous arm structure is more conducive to dispersing the deformation stress, and the L-shaped second arm and third arm are more conducive to amplifying the displacement of the rigid current-carrying bridge into the multi-directional movement of the second moving contact, which is more conducive to the movement of the second moving contact in two directions along the first direction and the third direction during the closing process of the bridge-type moving contact member and the static contact member, that is, it is more conducive to the frictional rubbing between the second moving contact and the second static contact. This advantage is more prominent when the second moving contact is used to connect and disconnect the circuit and the first moving contact is used for current-carrying, because it can effectively avoid the problem of large contact resistance on the contact surface caused by arcing between the second moving contact and the second static contact. In addition, the second moving contact is closed along the second direction, and at the same time, the first arm deforms in the third direction and the first direction, so that the second moving contact can form a three-dimensional wiping trajectory (such as a spiral or an arc) on the second static contact, further improving the cleaning effect of the second static contact and reducing the contact resistance.

[0039] In Technical Solution Eleven and its preferred embodiments, the bridging portion extends along the first direction, and the third arms of the two elastic deformation portions are respectively integrated with both ends on the same side of the bridging portion along the third direction, so that the two elastic deformation portions are symmetrically connected to both ends on the same side of the bridging portion, ensuring the balanced force of the two elastic deformation portions, thereby ensuring the synchronous movement of the second moving contacts on both sides, avoiding contact pressure deviation, and the manufacturing process is simpler; in addition, the deformation ability of the two elastic deformation portions can be enhanced; a widened section is provided at one end of the first arm away from the second arm, and the widened section is fixedly connected to the second moving contact. On the one hand, the widened section can increase the contact area between the second moving contact and the second static contact, reduce the contact resistance, and on the other hand, it can improve the local heat dissipation ability and reduce the temperature rise, thereby ensuring the flexibility of the first arm. When the second arm is provided with a bent segment, the bent segment of the second arm generates an instantaneous displacement along the first direction during the unfolding process when closing, which can enhance the wiping effect of the second moving contact on the second static contact. During the closing process of the bridge-type moving contact member and the static contact member, the bent segment will drive the two second moving contacts to move away from each other along the first direction, that is, it makes the second moving contact and the second static contact rub against each other along the first direction. When the bridge switch also has a movement along the third direction, then the second moving contact and the second static contact rub against each other along the third direction, so that the second moving contact and the second static contact have a larger rubbing area in both the first direction and the third direction, the cleaning effect of the contact surface is good, and the contact resistance is smaller.

[0040] In Technical Solution Twelve and its preferred embodiments, the third arms of the two elastic deformation parts are integrated, and the second arms of the two elastic deformation parts are integrated. On the one hand, the integrated arm structure enhances the overall stiffness of the flexible current-carrying bridge and avoids asynchronous movement on both sides. On the other hand, the connected arm structure provides a redundant conduction path, increases the current-carrying area, improves the current-carrying capacity, and further reduces the temperature rise. When the first arm is provided with a bent section, the bent section is adapted to unfold when the bridge-type moving contact and the static contact are closed. When the bent section unfolds, the elastic deformation length of the first arm increases, releasing greater elastic potential energy and providing additional contact pressure to ensure that the second moving contact and the second static contact are closely attached, reducing the contact resistance.

[0041] In Technical Solution Thirteen and its preferred embodiments, the third arms of the two elastic deformation parts are both integrated with the middle part of the bridging part along the first direction, so that the two elastic deformation parts are symmetrically connected to the bridging part. The middle part of the bridging part serves as a rigid support core, which can better resist the torsional moment generated when the second moving contact moves, ensure the balanced force of the two elastic deformation parts, thus ensuring the synchronous movement of the second moving contacts on both sides, avoiding contact pressure deviation, and having a simpler manufacturing process; convex parts protruding towards the second arm are respectively provided at both ends of the bridging part along the first direction. On the one hand, the convex parts can directly transfer the displacement of the rigid current-carrying bridge to the first moving contact to ensure the action reliability of the first moving contact. On the other hand, the convex parts increase the heat conduction cross-section and accelerate the heat transfer from the first moving contact to the rigid current-carrying bridge.

[0042] Technical Solution Fourteen and its preferred embodiments have the technical advantages of any one of Technical Solutions One to Eleven. Among them, the moving reed is fixedly connected to both the rigid current-carrying bridge and the flexible current-carrying bridge of the bridge-type moving contact. Here, the fixed connection includes both direct fixed connection and indirect fixed connection.

[0043] In Technical Solution Fifteen and its preferred embodiments, the armature is connected to the moving reed and is adapted to drive the bridge-type moving contact to swing. The bridge-type moving contact and the armature are spaced apart along the direction perpendicular to the contact closing direction and the layout direction of each static contact. There is less interference during the movement of the flexible current-carrying bridge, which is more conducive to the deformation of the elastic deformation part; also, during the closing process of the bridge-type moving contact and the static contact, the armature drives the first moving contact and the second moving contact to move relative to the corresponding static contacts through the moving reed. When this moving direction includes any one of Technical Solutions Ten to Eleven in the contact part, it is the third direction. As a result, the first arm has a movement component along the third direction driven by the moving reed, causing multiple-direction friction rubbing between the second moving contact and the second static contact, and also causing friction rubbing between the first moving contact and the first static contact. The friction rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation. The cleaning effect of the contact surface is good, further reducing the contact resistance, reducing the temperature rise, and improving the contact life.

[0044] In Technical Solution XVI and its preferred embodiments, the flexible current-carrying bridge is further provided with a bridging portion. The bridging portion and the rigid current-carrying bridge are fixed to the moving reed through the first moving contact. With high rigidity, it is more conducive to the movement of the moving reed being transmitted to the bridge-type moving contact, more conducive to ensuring the synchronous movement (synchronous contact and synchronous disconnection) of the two first moving contacts, and also conducive to maintaining the contact pressure of the second moving contact on the second static contact, thereby ensuring the stable closing and stable disconnection of the bridge-type moving contact and the static contact.

[0045] Technical Solution XVII and its preferred embodiments have the technical advantages of any one of Technical Solutions XII to XIII. Among them, the moving reed is fixedly connected to both the rigid current-carrying bridge and the flexible current-carrying bridge of the bridge-type moving contact. Here, the fixed connection includes both direct fixed connection and indirect fixed connection.

[0046] In Technical Solution XVIII and its preferred embodiments, the armature is connected to the moving reed and is adapted to drive the bridge-type moving contact to swing. The rigid current-carrying bridge and the armature are spaced apart in the third direction. Therefore, during the closing process of the bridge-type moving contact and the static contact, the armature drives the first moving contact and the second moving contact to move relative to the corresponding static contacts in the third direction through the moving reed, so that the first arm has a movement component in the third direction driven by the moving reed, causing multiple-directional frictional rubbing between the second moving contact and the second static contact, and also causing frictional rubbing between the first moving contact and the first static contact. The frictional rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation, etc. The cleaning effect of the contact surface is good, further reducing the contact resistance, reducing the temperature rise, and increasing the contact life. The second arm and the armature at least partially overlap in the third direction on the projection plane perpendicular to the second direction, which also means that the second arm has a larger width, a larger current-carrying area, better current-carrying effect, lower temperature rise, and avoids the negative impact of excessive temperature rise on the deformation of the elastic deformation part, thereby ensuring the flexibility of the elastic deformation part.

[0047] In Technical Solution XIX and its preferred embodiments, the armature is provided with a convex bud fixedly connected to the moving reed, and the second arm is further provided with a relief hole for avoiding interference of the convex bud on the movement of the second arm.

[0048] In Technical Solution XX and its preferred embodiments, the flexible current-carrying bridge is further provided with a bridging portion. The bridging portion and the rigid current-carrying bridge are fixed to the moving reed through the first moving contact. With high rigidity, it is more conducive to the movement of the moving reed being transmitted to the bridge-type moving contact, more conducive to ensuring the synchronous movement (synchronous contact and synchronous disconnection) of the two first moving contacts, and also conducive to maintaining the contact pressure of the second moving contact on the second static contact, thereby ensuring the stable closing and stable disconnection of the bridge-type moving contact and the static contact. Description of the Drawings

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0050] Figure 1 Stereo exploded view of Embodiment 1 of the present application;

[0051] Figure 2 Schematic diagram of the hidden cover of Embodiment 1 of the present application;

[0052] Figure 3 Schematic diagram of the moving contact and armature of Embodiment 1 of the present application;

[0053] Figure 4 Top view of the moving contact connected to the armature of Embodiment 1 of the present application;

[0054] Figure 5 Schematic diagram of the hidden cover of Embodiment 2 of the present application;

[0055] Figure 6 Schematic diagram of the moving contact and armature of Embodiment 2 of the present application;

[0056] Figure 7 Top view of the moving contact connected to the armature of Embodiment 2 of the present application.

[0057] Main reference numeral description:

[0058] Coil assembly 10; iron core 20; yoke 30; first extension arm 31; second extension arm 32; armature 40; convex bud 41; housing 50; base 51; cover 52; static contact 60; first static contact point 61; second static contact point 62; load terminal 63; moving contact assembly 70; first moving contact point 71; second moving contact point 72; moving reed 73; first connection portion 731; second connection portion 732; connecting arm 733; connecting piece 734; flexible current-carrying bridge 74; bridging portion 741; protruding portion 7411; elastic deformation portion 742; first arm 743; widened section 7431; second arm 744; relief hole 7441; third arm 745; bent section 746; rigid current-carrying bridge 75; bridge-type moving contact 76; permanent magnet 80. Detailed implementation manners

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0060] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects rather than for describing a specific order.

[0061] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "vertical", "level", "perpendicular", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or positional relationship, it is based on the orientation and positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present invention.

[0062] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally connected, and being fixed connected through other devices or elements.

[0063] In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0064] In the claims and the description except for the embodiments, the terms "first direction", "third direction" and "second direction" only mean that the feature having one of the above directions is perpendicular to the feature having another direction, and it is not required that it must be implemented in accordance with the "first direction", "third direction" and "second direction" introduced in the embodiments. In the embodiments, the first direction is perpendicular to the third direction and also perpendicular to the second direction.

[0065] Embodiment 1

[0066] See Figure 1 , Figure 1 which shows a relay, including a magnetic circuit part and a contact part, Figure 1 and the relay in is in the form of a clapper relay.

[0067] The magnetic circuit part includes a coil assembly 10, an iron core 20, a yoke 30, and an armature 40. The coil assembly 10 includes a coil, a bobbin, and coil terminals. The coil is wound around the bobbin, and the winding axis of the coil extends along the second direction. The coil terminals are electrically connected to the coil and extend out of the bobbin. The iron core 20 penetrates the bobbin along the second direction, and one end of the iron core 20 along the second direction is set as a magnetic pole face. The yoke 30 is provided with a first extension arm 31 and a second extension arm 32. The first extension arm 31 is fixedly connected to the other end of the iron core 20 extending out of the bobbin and extends along the third direction. The second extension arm 32 is located on the first side of the bobbin along the third direction and extends along the second direction. The armature 40 is arranged close to the magnetic pole face of the iron core 20 and can abut against one end of the second extension arm 32 away from the first extension arm 31. The armature 40 swings in a plane perpendicular to the first direction to attract or move away from the magnetic pole face of the iron core 20.

[0068] The housing 50 includes a base 51 and a cover 52. The base 51 is located on the second side of the bobbin along the third direction and is fixedly connected to the bobbin. The cover 52 covers the bobbin and is fixedly connected to the base 51. A movement space for the movement of the armature 40 is formed between the cover 52 and the bobbin.

[0069] The contact part includes two static contact members 60 and a moving contact assembly 70. The static contact members 60 are fixedly connected to the base 51. Each static contact member 60 is provided with a first static contact point 61 and a second static contact point 62 at intervals. Each static contact member 60 is further provided with a load terminal 63 electrically connected to the first static contact point 61 and the second static contact point 62. In this embodiment, the first static contact points 61 of the two static contact members 60 are close to each other, and the second static contact points 62 are far from each other. Exemplarily, the first static contact point 61 and the second static contact point 62 are arranged at intervals along the first direction. Each second static contact point 62 is respectively located on both sides of each first static contact point 61 along the first direction, that is, the two first static contact points 61 are located between the two second static contact points 62 along the first direction, and the first static contact point 61 and the second static contact point 62 are both close to the first end of the coil assembly 10 in the second direction ( Figure 1 the front end in the middle), and the two load terminals 63 are both located on the second side of the coil assembly 10 along the third direction and are arranged along the first direction. It should be understood that the number of the first static contact point 61 and the second static contact point 62 is not limited to one, and can also be two or more.

[0070] The moving contact assembly 70 is used to connect the armature 40. The moving contact assembly 70 is provided with a first moving contact point 71 corresponding to the first static contact points 61 of the two static contact members, and a second moving contact point 72 corresponding to the second static contact points 62 of the two static contact members 60. In this embodiment, the moving contact assembly 70 includes a moving reed 73 and a bridge-shaped moving contact member 76. See Figures 2 - 3, The moving reed 73 is provided with a first connecting portion 731 fixedly connected to the yoke 30, a second connecting portion 732 fixedly connected to the armature 40, a connecting arm 733, and a connecting piece 734. The first connecting portion 731 extends along the second direction and is located on the first side of the coil assembly 10 along the third direction. The second connecting portion 732 abuts against the armature 40 and extends along the third direction. The first connecting portion 731 and the second connecting portion 732 are integrally formed and a bend is formed therebetween. The connecting arm 733 extends along the third direction and is located between the second connecting portion 732 and the connecting piece 734. The two ends of the connecting arm 733 along the third direction are integrally connected to the second connecting portion 732 and the connecting piece 734 respectively.

[0071] The bridge-type moving contact 76 includes a rigid current-carrying bridge 75 and a flexible current-carrying bridge 74. The rigid current-carrying bridge 75 is provided with a first moving contact 71 corresponding to the first static contact point 61 of the two static contacts 60; the flexible current-carrying bridge 74 is provided with an elastic deformation portion 742, and is provided with a second moving contact 72 corresponding to the second static contact point 62 of the two static contacts 60. The second moving contact 72 is arranged on the elastic deformation portion 742. When the bridge-type moving contact 76 is disconnected from the two static contacts 60, the distance between the second moving contact 72 and the second static contact point 62 is smaller than the distance between the first moving contact 71 and the first static contact point 61. Among them, the first moving contact 71 and the second moving contact 72 are respectively adapted to be closed or disconnected from the first static contact point 61 and the second static contact point 62 along the second direction.

[0072] In this embodiment, the flexible current-carrying bridge 74 has conductivity and elasticity, and includes both an integral structure and a split structure. If the split structure is adopted, it is necessary to ensure that the split connection does not affect the free deformation of the elastic deformation portion 742 and keeps the conductive path continuous; see Figures 3 - 4 , the flexible current-carrying bridge 74 is provided with a bridging portion 741 and two elastic deformation portions 742 that are integrally connected; the bridging portion 741 extends along the first direction and is fixedly connected to the connecting piece 734 and the rigid current-carrying bridge 75 through the first moving contact 71. It should be understood that in this embodiment, the number of the elastic deformation portions 742 should be the same as the number of the second moving contacts 72, and the relationship between the second moving contact 72 and the corresponding second static contact point 62 can be a one-to-one relationship or a many-to-many relationship.

[0073] Each elastic deformation part 742 is provided with a first connection end and a second connection end. The second connection end is fixedly connected to the second moving contact 72. A non-linear elastic deformation path is provided between the second connection end and the first connection end. The non-linear elastic deformation path means that the physical path of the elastic deformation part 742 is not a straight line shape, such as a wavy shape, a spiral shape or a multi-segment bent structure. The elastic deformation part 742 forms a non-linear elastic deformation path through at least two bends. The elastic deformation part 742 is provided with a bent section 746. The bent section 746 is arranged on the deformation transmission path of the elastic deformation part 742, and the bent section 746 is adapted to unfold when the bridge moving contact 76 and the static contact 60 are closed, so as to provide a contact pressure to the second moving contact 72.

[0074] Specifically, referring to Figure 3 , the elastic deformation part 742 is provided with a first arm 743, a second arm 744 and a third arm 745 connected in sequence. The extending direction of the second arm 744 intersects with the extending directions of both the first arm 743 and the third arm 745. In this embodiment, the first arm 743 and the rigid current-carrying bridge 75 are arranged at intervals along the first direction; the extending direction of the first arm 743 intersects with the first direction. In this embodiment, both the first arm 743 and the third arm 745 extend along the third direction; the second arm 744 extends along the first direction. The first arm 743 and the third arm 745 extend along the third direction, and the second arm 744 extends along the first direction. "Extend" means that when there is no external force acting on the arm, the natural stretching main trajectory of the arm extends along a specific direction, but local bends (such as a wavy shape, the bent section 746) are allowed. Even if the arm is locally bent during deformation, the main direction in its static undeformed state still extends along the specific direction, ensuring the controllability of deformation and the predictability of the movement trajectory. Among them, the second connection end is arranged on the first arm 743, and the first connection end is arranged on the third arm 745. The first arm 743 and / or the second arm 744 is provided with a bent section 746. The bent section 746 is bent in the reverse direction twice continuously so that the local part of the first arm 743 and / or the second arm 744 extends in a Z-shaped manner. In this embodiment, the bent section 746 is arranged on the first arm 743.

[0075] Referring to Figures 3 - 4 , the third arms 745 of the two elastic deformation parts 742 are connected as a whole, and the second arms 744 of the two elastic deformation parts 742 are connected as a whole, so that the two elastic deformation parts 742 as a whole form a "mountain" shape. The bridging part 741 is then connected to the third arms 745 of the two elastic deformation parts 742 as a whole. Specifically, the third arms 745 of the two elastic deformation parts 742 are both connected to the middle part of the bridging part 741 along the first direction. The two ends of the bridging part 741 along the first direction are respectively provided with protruding parts 7411 protruding towards the second arm 744, and the protruding parts 7411 are fixedly connected to the first moving contact 71.

[0076] Referring to Figure 4, a convex bud 41 fixedly connected to the moving reed 73 is provided on the armature 40, a relief hole 7441 for avoiding the convex bud 41 is provided on the second arm 744, and the inner diameter of the relief hole 7441 is greater than the outer diameter of the convex bud 41 so that there is a movement margin between the two. In practical applications, this convex bud 41 is used for riveting with the moving reed 73.

[0077] Still referring to Figure 4 , in this embodiment, the current-carrying cross-sectional area of the rigid current-carrying bridge 75 is greater than that of the flexible current-carrying bridge 74, and / or the conductivity of the rigid current-carrying bridge 75 is greater than that of the flexible current-carrying bridge 74. Wherein, on the projection plane perpendicular to the second direction, the rigid current-carrying bridge 75 covers the bridging portion 741 and the projection area of the rigid current-carrying bridge 75 is greater than the projection area of the bridging portion 741, and the thickness of the rigid current-carrying bridge 75 is greater than the thickness of the flexible current-carrying bridge 74. Exemplarily, the rigid current-carrying bridge 75 can be made of pure copper material in practical applications. In this embodiment, the rigid current-carrying bridge 75 and the bridging portion 741 are also fixedly connected to the connecting piece 734, wherein the connecting piece 734 is clamped between the rigid current-carrying bridge 75 and the bridging portion 741.

[0078] Therefore, the moving reed 73 is fixedly connected to both the rigid current-carrying bridge 75 and the flexible current-carrying bridge 74 of the bridge-type moving contact 76, and mainly the bridging portion 741 and the rigid current-carrying bridge 75 are fixed to the moving reed 73 through the first moving contact 71. The rigid current-carrying bridge 75 and the armature 40 are arranged at intervals in the third direction. The armature 40 is connected to the moving reed 73 and is adapted to drive the bridge-type moving contact 76 to swing in a plane perpendicular to the first direction around an axis extending in the first direction. It should be understood that "swing" means the rotational movement of the bridge-type moving contact 76 with a certain fulcrum as the center of rotation under the drive of the moving reed 73 and the armature 40. In this embodiment, the moving reed 73 is fixedly connected to both the rigid current-carrying bridge 75 and the flexible current-carrying bridge 74 of the bridge-type moving contact 76. The fixed connection here includes both direct fixed connection and indirect fixed connection.

[0079] In this embodiment, in the open state, the distance between the second moving contact 72 and the second static contact 62 in the second direction is less than the distance between the first moving contact 71 and the first static contact 61 in the second direction. In one embodiment, in the open state, each first moving contact 71 and each second moving contact 72 have the same height in the second direction, and the second static contact 62 protrudes in the second direction relative to the first static contact 61. In another embodiment, each first static contact 61 and each second static contact 62 have the same height in the second direction, and the second moving contact 72 protrudes in the second direction relative to the first moving contact 71. This embodiment is mainly realized through the bending section 746.

[0080] Referring to Figure 2, this embodiment further includes two magnets 80 respectively located along the circumference of the second stationary contact 62. In this embodiment, the magnets 80 are located on both sides of the second stationary contact 62 along the first direction. The magnets 80 are fixedly connected to the base 51. The arrangement of the magnets 80 is beneficial to arc extinguishing between the second moving contact 72 and the second stationary contact 62.

[0081] In this embodiment, when the bridge-shaped moving contact member 76 and the stationary contact member 60 are closed, the first moving contact 71 and the second moving contact 72 are in parallel, and each first moving contact 71 is in series. The contact resistance is small, the heat generated by the contacts is small, the temperature rise is reduced, the contact loss is reduced, and the contact life is prolonged.

[0082] In this embodiment, in the open state, the distance between the second moving contact 72 and the second stationary contact 62 is smaller than the distance between the first moving contact 71 and the first stationary contact 61. Therefore, when the bridge-shaped moving contact member 76 and the stationary contact member 60 are closed, the second moving contact 72 of the flexible current-carrying bridge first contacts and conducts current first; when the bridge-shaped moving contact member 76 and the stationary contact member 60 are opened, the second moving contact 72 of the flexible current-carrying bridge disconnects later. When the second moving contact 72 and the second stationary contact 62 are disconnected, an arc will be generated, but since the first stationary contact 61 and the second stationary contact 62 are spaced apart, therefore, the arc generated when the second moving contact 72 and the second stationary contact 62 are disconnected is not likely to affect the first moving contact 71 and the first stationary contact 61, thus ensuring the cleanliness of the surface of the first stationary contact 61, reducing the contact resistance between the first stationary contact 61 and the first moving contact 71. Since the elastic deformation portion 742 deforms during the contact or disconnection process, it is easy to drive the second moving contact 72 to move relative to the second stationary contact 62 and rub the oxides or carbides generated after cleaning the arc ablation on the surface of the second stationary contact 62. The cleaning effect of the contact surface is good. Therefore, setting the second moving contact 72 on the elastic deformation portion 742 can improve the cleaning effect on the surface of the second stationary contact 62 and reduce the contact resistance between the second moving contact 72 and the second stationary contact 62. Thus, between each moving contact and the corresponding stationary contact, there is a lower contact resistance due to the higher cleanliness of the surface of the corresponding stationary contact. This arrangement also enables the rigid current-carrying bridge 75 to carry the main current. Since the resistance of the rigid current-carrying bridge 75 is generally smaller than the resistance of the flexible current-carrying bridge 74, the heat generated by the entire bridge-shaped moving contact member 76 is low, the temperature rise is low, and it avoids the problem that when the temperature of the bridge-shaped moving contact member 76 is too high, it affects the deformation of the elastic deformation portion 742 and then leads to too high a contact resistance between the second moving contact 72 and the second stationary contact 62, that is, reduces the contact resistance between the second moving contact 72 and the second stationary contact 62. At the same time, the first moving contact 71 and the first stationary contact 61 are stably in contact and have a small contact resistance due to the arrangement of the rigid current-carrying bridge 75. Therefore, the life of each contact is prolonged.

[0083] In addition, if the second moving contact 72 is arranged on a structure without elasticity, the processing accuracy requirements for the flexible overcurrent bridge 74 are relatively high. Otherwise, it is very likely that some moving contacts are connected while some are not, and the effect of parallel connection and contact resistance reduction cannot be guaranteed. In this embodiment, the second moving contact 72 is arranged on the elastic deformation part 742. The second moving contact 72 of the flexible current-carrying bridge first contacts and conducts current, and the elastic deformation part 742 generates a deformation perpendicular to the contact surface of the contact, providing contact pressure, reducing the contact resistance between the second moving contact 72 and the second static contact 62, and enabling the second moving contact 72 to move relative to the second static contact 62 and rub the oxide on the surface of the second static contact 62 or carbide generated after cleaning the arc ablation. The cleaning effect of the contact surface is good, which is more conducive to ensuring the shunt of the second moving contact 72 and the reduction effect of the contact resistance on the basis of the connection between the second moving contact 72 and the second static contact 62, thereby ensuring the shunt of the second moving contact 72 and the reduction effect of the contact resistance.

[0084] In this embodiment, when the cross-sectional area of the rigid overcurrent bridge 75 for passing current is larger than that of the flexible overcurrent bridge 74, the current-carrying capacity of the rigid overcurrent bridge 75 can be improved, the current density can be reduced, the resistance of the rigid overcurrent bridge 75 can be decreased, the heat generation of the entire bridge-type moving contact 76 can be reduced, and the contact resistance between the second moving contact 72 and the second static contact 62 can be decreased. In addition, the cross-sectional area of the flexible overcurrent bridge 74 for passing current is smaller, and it can have better elasticity, so that the second moving contact 72 has a better cleaning effect during the disconnection or closing process with the second static contact 62; when the conductivity of the rigid overcurrent bridge 75 is greater than that of the flexible overcurrent bridge 74, a material with a higher conductivity can be selected for the rigid overcurrent bridge 75 compared with the flexible overcurrent bridge 74. Because in the prior art, in order to ensure the flexibility of the conductive material, other elements are usually doped into the conductive material, but the conductivity of the conductive material will decrease after doping, the current-carrying capacity will decrease, and problems such as temperature rise will follow. The rigid overcurrent bridge 75 can be undoped and thus has a higher current-carrying capacity. Therefore, the rigid overcurrent bridge 75 has a higher current-carrying capacity and a lower resistance compared with the flexible overcurrent bridge 74, which is more conducive to reducing the heat generation of the entire bridge-type moving contact 76, thereby reducing the contact resistance between the second moving contact 72 and the second static contact 62.

[0085] In this embodiment, the number of the elastic deformation parts 742 corresponds to the number of the second moving contacts 72, which can avoid uneven pressure caused by a single elastic deformation part 742 driving multiple second moving contacts 72 and reduce the overall contact resistance; compared with the linear path, the non-linear elastic deformation path can increase the effective deformation length, improve the elastic deformation ability, make the displacement of the second moving contact 72 larger and have multi-directional deformation, make the rubbing range between the second moving contact 72 and the second static contact 62 larger, and the cleaning effect of the contact surface is better, so that it is more conducive to reducing the contact resistance between the second moving contact 72 and the second static contact 62.

[0086] In this embodiment, the number and angle of the bending can adjust the stiffness and deformation amount of the elastically deformable part 742, optimize the displacement trajectory of the second moving contact 72, and enhance the contact cleaning effect.

[0087] In this embodiment, when the bent section 746 is closed, it unfolds to release elastic potential energy, which can provide an additional contact pressure to the second moving contact 72, reducing the contact resistance between the second moving contact 72 and the second static contact 62. In addition, during the unfolding process of the bent section 746, the second moving contact 72 will also be driven to displace, further enhancing the friction cleaning effect between the second moving contact 72 and the second static contact 62.

[0088] In this embodiment, the different extending directions of the first arm 743, the second arm 744, and the third arm 745 cause the elastically deformable part 742 to form two bends, and the elastically deformable part 742 generates a composite deformation when stressed, enhancing the displacement flexibility of the second moving contact 72. In addition, the structures of the first arm 743, the second arm 744, and the third arm 745 form a continuous arm structure, which is more conducive to dispersing the deformation stress. This structure also enables the second moving contact 72 to displace in at least two directions of the extending direction of the first arm 743 and the extending direction of the second arm 744, which is more conducive to the large-range rubbing of the second moving contact 72 against the second static contact 62, enhancing the cleaning effect between the contacts.

[0089] In this embodiment, the first arm 743 and / or the second arm 744 are provided with a bent section 746. When the bent section 746 is closed, it unfolds to release elastic potential energy, which can provide an additional contact pressure to the second moving contact 72, reducing the contact resistance between the second moving contact 72 and the second static contact 62. In addition, during the unfolding process of the bent section 746, the second moving contact 72 will also be driven to displace, further enhancing the friction cleaning effect between the second moving contact 72 and the second static contact 62. Among them, the Z-shaped structure of the first arm 743 and / or the second arm 744 releases greater elastic potential energy when unfolding, further providing a stable contact pressure to the second moving contact 72 and reducing the contact resistance between the second moving contact 72 and the second static contact 62. When the bent section 746 is provided on the first arm 743, the bent section 746 is located on the deformation transmission path of the first arm 743. When the bridge-type moving contact 76 and the static contact 60 are closed, the bent section 746 unfolds to directly apply a contact pressure to the second moving contact 72, the contact pressure of the second moving contact 72 is greater, the contact between the second moving contact 72 and the second static contact 62 is more stable, and the contact resistance is smaller.

[0090] In this embodiment, the first stationary contacts 61 are arranged at intervals along the first direction, and the second stationary contacts 62 are respectively located on both sides of each first stationary contact 61 along the first direction. On the one hand, compared with the second stationary contacts 62 of the two stationary contact members 60 being close to each other, the attraction or interference between the arcs of the second stationary contacts 62 can be reduced, improving the arc extinguishing effect. On the other hand, it also enables the elastic deformation part 742 fixedly connected to the second moving contact 72 to have a larger deformation space, so that when the second moving contact 72 moves, it has a larger rubbing range with respect to the second stationary contact 62, better cleaning effect, and further reduces the contact resistance between the second moving contact 72 and the second stationary contact 62. The first arm 743 and the rigid current-carrying bridge 75 are arranged at intervals along the first direction, and the extending direction of the first arm 743 intersects with the first direction. Therefore, the first arm 743 and the second moving contact 72 have a movement component along the first direction. Since the second moving contact 72 also has a movement component along the extending direction of the first arm 743 and the extending direction of the first arm 743 intersects with the first direction, the second moving contact 72 has movement components in at least two directions during the process of closing or disconnecting from the second stationary contact 62. During the closing process, multiple-directional frictional rubbing is formed between the second moving contact 72 and the second stationary contact 62. In addition, frictional rubbing is also formed between the first moving contact 71 and the first stationary contact 61. The frictional rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation. The cleaning effect of the contact surface is good, further reducing the contact resistance and the temperature rise.

[0091] In this embodiment, the flexible current-carrying bridge 74 is further provided with a bridging part 741. The bridging part 741 is integrally connected with the third arms 745 of the two elastic deformation parts 742, making the flexible current-carrying bridge 74 form an integrated framework, and the manufacturing process is simpler; the bridging part 741 and the rigid current-carrying bridge 75 are fixedly connected through the first moving contact 71. On the one hand, the bridging part 741 and the rigid current-carrying bridge 75 form a parallel current path, reducing the local temperature rise. On the other hand, only the bridging part 741 of the flexible current-carrying bridge 74 needs to be connected to the rigid current-carrying bridge 75. Compared with the two bridging parts 741 being respectively connected to the rigid current-carrying bridge 75, the installation steps are fewer, the structure is more compact, and the fixed support of the rigid current-carrying bridge 75 enhances the overall structural stability of the bridge-type moving contact member 76, which is beneficial to resisting the impact when the moving and stationary contacts come into contact. In addition, the two elastic deformation parts 742 are linked through the bridging part 741 and the rigid current-carrying bridge 75, which is beneficial to evenly distributing the contact pressure of the second moving contact 72 on the second stationary contact 62 during the contact process between the first moving contact 71 and the first stationary contact 61.

[0092] In this embodiment, in the technical solution, both the first moving contact 71 and the second moving contact 72 are closed with the corresponding static contacts along the second direction. The structures of the first arm 743, the second arm 744, and the third arm 745 form a U-shaped continuous arm structure. The U-shaped continuous arm structure is more conducive to dispersing the deformation stress, and the L-shaped second arm 744 and third arm 745 are more conducive to amplifying the displacement of the rigid current-carrying bridge 75 into the multi-directional movement of the second moving contact 72, which is more conducive to the movement of the second moving contact 72 in two directions along the first direction and the third direction during the closing process of the bridge-type moving contact member 76 and the static contact member 60. That is, it is more conducive to the frictional rubbing between the second moving contact 72 and the second static contact 62. This advantage is more prominent when the second moving contact 72 is used to connect and disconnect the circuit and the first moving contact 71 is used for current-carrying, because it can effectively avoid the problem of large contact surface resistance caused by arcing between the second moving contact 72 and the second static contact 62. In addition, the second moving contact 72 is closed along the second direction, and at the same time, the first arm 743 deforms in the third direction and the first direction, so that the second moving contact 72 can form a three-dimensional wiping trajectory (such as a spiral or an arc) on the second static contact 62, further improving the cleaning effect of the second static contact 62 and reducing the contact resistance.

[0093] In this embodiment, the third arms 745 of the two elastic deformation parts 742 are connected as a whole, and the second arms 744 of the two elastic deformation parts 742 are connected as a whole. On the one hand, the integrated arm structure enhances the overall stiffness of the flexible current-carrying bridge 74 and avoids asynchronous movement on both sides. On the other hand, the connected arm structure provides a redundant conduction path, increases the current-carrying area, improves the current-carrying capacity, and further reduces the temperature rise. When the first arm 743 is provided with a bending section 746, the bending section 746 is adapted to unfold when the bridge-type moving contact member 76 and the static contact member 60 are closed. When the bending section 746 unfolds, the elastic deformation length of the first arm 743 increases, releasing greater elastic potential energy and providing an additional contact pressure to ensure the close fit between the second moving contact 72 and the second static contact 62 and reduce the contact resistance.

[0094] In this embodiment, the third arms 745 of the two elastic deformation parts 742 are both connected to the middle part of the bridging part 741 along the first direction, so that the two elastic deformation parts 742 are symmetrically connected to the bridging part 741. The middle part of the bridging part 741 serves as a rigid support core, which can better resist the torsional moment generated when the second moving contact 72 moves, ensure the balanced force of the two elastic deformation parts 742, thus ensuring the synchronous movement of the second moving contacts 72 on both sides, avoiding contact pressure deviation, and the manufacturing process is simpler; both ends of the bridging part 741 along the first direction are respectively provided with protruding parts 7411 protruding towards the second arm 744. On the one hand, the protruding parts 7411 can directly transfer the displacement of the rigid current-carrying bridge 75 to the first moving contact 71 to ensure the action reliability of the first moving contact 71. On the other hand, the protruding parts 7411 increase the heat conduction cross-section and accelerate the heat transfer from the first moving contact 71 to the rigid current-carrying bridge 75.

[0095] In this embodiment, the armature 40 is connected to the moving reed 73 and is adapted to drive the bridge-type moving contact 76 to swing. The rigid current-carrying bridge 75 and the armature 40 are arranged at an interval in the third direction. Therefore, during the closing process of the bridge-type moving contact 76 and the static contact 60, the armature 40 drives the first moving contact 71 and the second moving contact 72 to move relative to the corresponding static contacts in the third direction through the moving reed 73, so that the first arm 743 has a movement component in the third direction driven by the moving reed 73, causing the second moving contact 72 to form frictional rubbing in multiple directions with the second static contact 62, and the first moving contact 71 also forms frictional rubbing with the first static contact 61. The frictional rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation, etc. The cleaning effect of the contact surface is good, further reducing the contact resistance, reducing the temperature rise, and increasing the contact life. The second arm 744 and the armature 40 at least partially overlap in the third direction on the projection plane perpendicular to the second direction, which also means that the second arm 744 has a larger width, a larger current-carrying area, a better current-carrying effect, and a lower temperature rise, thus ensuring the flexibility of the elastic deformation part 742.

[0096] In this embodiment, the armature 40 is provided with a convex bud 41 fixedly connected to the moving reed 73, and the second arm 744 is also provided with a relief hole 7441 for avoiding interference with the movement of the second arm 744 by the convex bud 41.

[0097] In this embodiment, the flexible current-carrying bridge 74 is further provided with a bridging portion 741. The bridging portion 741 and the rigid current-carrying bridge 75 are fixed to the moving reed 73 through the first moving contact 71. It has a large rigidity, which is more conducive to the movement of the moving reed 73 being transmitted to the bridge-type moving contact 76, more conducive to ensuring the synchronous movement (synchronous contact and synchronous disconnection) of the two first moving contacts 71, and also conducive to maintaining the contact pressure of the second moving contact 72 on the second static contact 62, thus ensuring the stable closing and stable disconnection of the bridge-type moving contact 76 and the static contact 60.

[0098] Embodiment 2

[0099] The structure of Embodiment 2 is basically the same as that of Embodiment 1. The difference lies in the structure of the flexible current-carrying bridge 74 in Embodiment 2. Specifically, see Figures 5 - 7, in this embodiment, the bridge-shaped moving contact 76 and the armature 40 are arranged at intervals in a direction perpendicular to the contact closing direction and the arrangement direction of each static contact. In this embodiment, the bridge-shaped moving contact 76 and the armature 40 are arranged at intervals in the third direction. Therefore, the elastic deformation part 742 and the armature 40 are staggered from each other in the third direction on the projection plane perpendicular to the second direction. The third arms 745 of the two elastic deformation parts 742 are respectively integrally connected to the two ends on the same side of the bridging part 741 in the third direction. The second arm 744 is provided with a bending section 746, and the bending section 746 is adapted to unfold when the bridge-shaped moving contact 76 and the static contact 60 are closed. The end of the first arm 743 away from the second arm 744 is provided with a widened section 7431, and the widened section 7431 is fixedly connected to the second moving contact 72.

[0100] , in this embodiment, when the bending section 746 is provided on the second arm 744, the second arm 744 connects the first arm 743 and the third arm 745. When the bending section 746 of the second arm 744 unfolds, it is easy to drive the second moving contact 72 to displace along the extending direction of the second arm 744, which is more conducive to the displacement of the second moving contact 72 in at least two directions of the extending direction of the first arm 743 and the extending direction of the second arm 744, and is more conducive to the large-range rubbing of the second moving contact 72 against the second static contact 62, enhancing the cleaning effect between the contacts.

[0101] In this embodiment, the third arms 745 of the two elastic deformation portions 742 are respectively integrally connected to the two ends on the same side of the bridging portion 741 along the third direction, so that the two elastic deformation portions 742 are symmetrically connected to the two ends on the same side of the bridging portion 741, ensuring the balanced force on the two elastic deformation portions 742, thereby ensuring the synchronous movement of the second moving contacts 72 on both sides, avoiding the deviation of the contact pressure, and the manufacturing process is simpler; in addition, the deformation ability of the two elastic deformation portions 742 can be enhanced; a widened section 7431 is provided at one end of the first arm 743 away from the second arm 744, and the widened section 7431 is fixedly connected to the second moving contact 72. On the one hand, the widened section 7431 can increase the contact area between the second moving contact 72 and the second static contact 62, reduce the contact resistance, and on the other hand, improve the local heat dissipation ability, reduce the temperature rise, thereby ensuring the flexibility of the first arm 743. When the second arm 744 is provided with a bent section 746, the bent section 746 of the second arm 744 generates an instantaneous displacement along the first direction during the unfolding process when closing, which can enhance the wiping effect of the second moving contact 72 on the second static contact 62. During the closing process of the bridge-type moving contact member 76 and the static contact member 60, the bent section 746 will drive the two second moving contacts 72 to move away from each other along the first direction, that is, the second moving contact 72 and the second static contact 62 rub against each other along the first direction. When the bridge switch also has a movement along the third direction, the second moving contact 72 and the second static contact 62 rub against each other along the third direction, so that the second moving contact 72 and the second static contact 62 have a large rubbing area in both the first direction and the third direction, the cleaning effect of the contact surface is good, and the contact resistance is smaller.

[0102] In this embodiment, the armature 40 is connected to the moving reed 73 and is adapted to drive the bridge-type moving contact member 76 to swing. The bridge-type moving contact member 76 and the armature 40 are arranged at an interval in a direction perpendicular to the contact closing direction and the arrangement direction of each static contact. The flexible current-carrying bridge 74 has less interference during movement, which is more conducive to the deformation of the elastic deformation portion 742; therefore, during the closing process of the bridge-type moving contact member 76 and the static contact member 60, the armature 40 drives the first moving contact 71 and the second moving contact 72 to move relative to the corresponding static contacts through the moving reed 73. This movement direction is the third direction, so that the first arm 743 has a movement component along the third direction driven by the moving reed 73, so that multiple-direction rubbing is formed between the second moving contact 72 and the second static contact 62, and rubbing is also formed between the first moving contact 71 and the first static contact 61. The rubbing can rub off the oxides on the contact surface or clean the carbides generated after arc ablation, etc. The cleaning effect of the contact surface is good, the contact resistance is further reduced, the temperature rise is reduced, and the contact life is improved.

[0103] It should be understood that although the bridge-type moving contact 76 and the contact portion in Embodiment 1 and Embodiment 2 provided in the present application are described with a clapper relay as an exemplary application scenario, the protection scope of the technical solution is not limited thereto. Based on the common technical knowledge of those skilled in the art, without departing from the core inventive concept of the present application, the structural design of the bridge-type moving contact 76 and the contact portion can be adaptively adjusted and extended to other types of relays, and such variations or derivative applications should still be regarded as falling within the protection scope defined by the claims of the present application.

[0104] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation to the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art can, in combination with common general knowledge, the common technical knowledge in the art and / or the prior art, make modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features through logical analysis, reasoning or limited experiments, and all of them should be included in the protection scope of the present invention.

Claims

1. A bridge switch, comprising two stationary contacts (60) and a bridge movable contact (76); wherein: Each stationary contact (60) is provided with a first stationary contact point (61) and a second stationary contact point (62) at intervals; The bridge-type moving contact (76) comprises a rigid overcurrent bridge (75) and a flexible overcurrent bridge (74); the rigid overcurrent bridge (75) is provided with a first moving contact (71) corresponding to the first static contact (61) of the two static contacts (60); when the bridge-type moving contact (76) is disconnected from the two static contacts (60), the distance between the second moving contact (72) and the second static contact (62) is smaller than the distance between the first moving contact (71) and the first static contact (61); The flexible overcurrent bridge (74) is provided with an elastic deformation portion (742), and a second movable contact (72) is provided corresponding to the second static contact points (62) of the two static contact members (60), and the second movable contact (72) is arranged on the elastic deformation portion (742).

2. A bridge switch as claimed in claim 1, characterized in that: The flow cross-sectional area of ​​the rigid flow cross-sectional area of ​​the rigid flow cross-sectional area of ​​the flexible flow cross-sectional area of ​​the flexible flow cross-sectional area of ​​the flexible flow cross-sectional area of ​​the rigid ...

3. A bridge switch as claimed in claim 1, characterized in that: The number of the elastic deformation parts (742) corresponds to the number of the second moving contacts (72); each elastic deformation part (742) is provided with a first connection end and a second connection end, the second connection end is fixedly connected to the second moving contact (72), and a nonlinear elastic deformation path is provided between the second connection end and the first connection end.

4. A bridge switch as claimed in claim 3, characterized in that: The elastic deformation portion (742) forms a nonlinear elastic deformation path through at least two bends.

5. A bridge switch according to any one of claims 1 to 4, characterized in that: The elastic deformation portion (742) is provided with a bending section (746), the bending section (746) is provided on the deformation transmission path of the elastic deformation portion (742), and the bending section (746) is suitable for unfolding when the bridge-type moving contact (76) and the static contact (60) are closed.

6. A bridge switch as claimed in claim 4, characterized in that: The elastic deformation portion (742) is provided with a first arm (743), a second arm (744) and a third arm (745) which are connected in sequence, and the extension direction of the second arm (744) intersects with the extension directions of the first arm (743) and the third arm (745); the second connecting end is provided on the first arm (743), and the first connecting end is provided on the third arm (745).

7. A bridge switch as claimed in claim 6, characterized in that: The first arm (743) and / or the second arm (744) are provided with a bending section (746), and the bending section (746) is bent in reverse twice continuously so that the first arm (743) and / or the second arm (744) partially extends in a Z shape, and the bending section (746) is suitable for unfolding when the bridge-type moving contact (76) and the static contact (60) are closed.

8. A bridge switch as claimed in claim 6 or 7, characterized in that: The first static contacts (61) are arranged at intervals along a first direction, and the second static contacts (62) are respectively located on both sides of the first static contacts (61) along the first direction; the first arm (743) and the rigid overcurrent bridge (75) are arranged at intervals along the first direction; and the extension direction of the first arm (743) intersects with the first direction.

9. A bridge switch as claimed in claim 8, characterized in that: The number of the elastic deformation parts (742) is two; the flexible overcurrent bridge (74) is also provided with a bridging part (741), the bridging part (741) is integrally connected with the third arms (745) of the two elastic deformation parts (742), and the bridging part (741) is fixedly connected with the rigid overcurrent bridge (75) via the first moving contact (71).

10. A bridge switch as claimed in claim 9, characterized in that: The first movable contact (71) and the second movable contact (72) are respectively suitable for closing or opening with the first static contact (61) and the second static contact (62) along the second direction; the first arm (743) and the third arm (745) both extend along the third direction; the second arm (744) extends along the first direction; the first direction, the second direction and the third direction are orthogonal.

11. A bridge switch as claimed in claim 10, characterized in that: The bridging portion (741) extends along a first direction, and the third arms (745) of the two elastic deformation portions (742) are respectively connected to the two ends of the bridging portion (741) on the same side along the third direction; a widened section (7431) is provided at one end of the first arm (743) away from the second arm (744), and the widened section (7431) is fixedly connected to the second moving contact (72).

12. A bridge switch as claimed in claim 10, characterized in that: The third arms (745) of the two elastic deformation parts (742) are connected as one body, and the second arms (744) of the two elastic deformation parts (742) are connected as one body.

13. A bridge switch as claimed in claim 12, characterized in that: The bridging portion (741) extends along a first direction, and the third arms (745) of the two elastic deformation portions (742) are integrally connected to the middle portion of the bridging portion (741) along the first direction. Both ends of the bridging portion (741) along the first direction are respectively provided with protruding portions (7411) protruding toward the second arm (744), and the protruding portions (7411) are fixedly connected to the first moving contact (71).

14. A relay, characterized in that: The invention comprises a movable reed (73) and a bridge switch according to any one of claims 1 to 11, wherein the movable reed (73) is fixedly connected to a rigid overcurrent bridge (75) and a flexible overcurrent bridge (74) of the bridge movable contact (76).

15. A relay as claimed in claim 14, characterized in that: It also includes an armature (40), the armature (40) is connected to the moving spring (73) and is suitable for driving the bridge-type moving contact (76) to swing; the bridge-type moving contact (76) and the armature (40) are spaced apart in a direction perpendicular to the contact closing direction and the arrangement direction of each static contact.

16. A relay as claimed in claim 14, characterized in that: The flexible overcurrent bridge (74) is also provided with a bridging portion (741), and the bridging portion (741) and the rigid overcurrent bridge (75) are fixed to the moving reed sheet (73) via the first moving contact (71).

17. A relay, characterized in that: The invention comprises a movable reed (73) and a bridge switch according to any one of claims 12 to 13, wherein the movable reed (73) is fixedly connected to a rigid overcurrent bridge (75) and a flexible overcurrent bridge (74) of the bridge movable contact (76).

18. A relay as claimed in claim 17, characterized in that: It also includes an armature (40), the armature (40) is connected to the moving spring (73) and is suitable for driving the bridge-type moving contact (76) to swing; the rigid current bridge (75) and the armature (40) are spaced apart along the third direction; the second arm (744) and the armature (40) at least partially overlap along the third direction on a projection plane perpendicular to the second direction.

19. A relay as claimed in claim 18, characterized in that: The armature (40) is provided with a convex burl (41) fixedly connected to the movable spring sheet (73), and the second arm (744) is also provided with a clearance hole (7441) that avoids the convex burl (41).

20. A relay as claimed in claim 17, characterized in that: The flexible overcurrent bridge (74) is also provided with a bridging portion (741), and the bridging portion (741) and the rigid overcurrent bridge (75) are fixed to the moving reed sheet (73) via the first moving contact (71).

Images