A contact mechanism and a load switch

Abstract

This utility model discloses a contact mechanism and a load switch, relating to the field of low-voltage electrical technology. The contact mechanism includes a housing and a transmission component, a moving contact, a stationary contact, and a first elastic element disposed within the housing. The transmission component is movably connected to the moving contact and drives the moving contact to open and close with the stationary contact. The moving contact includes a first moving contact and a second moving contact spaced apart along its width. The first elastic element is connected to the moving contact and applies a spring force to the moving contact, so that the first moving contact contacts the stationary contact before the second moving contact when closing, and separates from the stationary contact after the second moving contact when opening. The contact mechanism provided by this application can avoid the increase in the path resistance formed between the moving and stationary contacts after long-term use, reducing energy consumption and extending service life, ensuring safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a contact mechanism and a load switch. Background Technology

[0002] The function of a load switch is to control the on / off state of the load in a circuit, so as to keep electrical appliances running safely. It is widely used in home appliances, remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the important control components.

[0003] Currently, load switches typically utilize a magnetic circuit assembly to drive an armature assembly, which in turn moves the moving contact against the stationary contact to open and close. However, current load switches generally achieve closing by surface-to-surface contact, meaning single-point contact. Over time, this leads to erosion at the contact point, increasing the resistance of the circuit formed by the moving and stationary contacts, increasing energy consumption, and shortening the load switch's lifespan. Therefore, there is an urgent need for a load switch product that avoids increased resistance and reduces energy consumption. Utility Model Content

[0004] The purpose of this application is to provide a contact mechanism and a load switch that can prevent the increase of the circuit resistance formed by the moving contact and the stationary contact after long-term use, reduce energy consumption, extend service life, and ensure safety and reliability.

[0005] A first aspect of this application provides a contact mechanism, including a housing and a transmission member, a moving contact, a stationary contact, and a first elastic member disposed within the housing. The transmission member is movably connected to the moving contact and is used to drive the moving contact to open and close with the stationary contact. The moving contact includes a first moving contact and a second moving contact spaced apart along its width direction. The first elastic member is connected to the moving contact and is used to apply elastic force to the moving contact so that the first moving contact contacts the stationary contact before the second moving contact when closing, and separates from the stationary contact after the second moving contact when opening.

[0006] As one possible implementation, the moving contact also includes a contact rod and a linkage part. The contact rod is provided with a first end and a second end opposite to each other. The linkage part is provided at the first end and is movably connected to the transmission member. The first moving contact and the second moving contact are both provided at the first end. The first end is used to move around the second end under the drive of the transmission member.

[0007] As one possible implementation, there is one contact rod, one end of the first elastic member is connected to the side of the contact rod where the first moving contact is provided along its width direction, and the other end abuts against the transmission member.

[0008] As one possible implementation, there are two contact rods, namely a first contact rod and a second contact rod, with a first moving contact point disposed on the first contact rod and a second moving contact point disposed on the second contact rod; One end of the first elastic element is connected to the first contact rod, and the other end abuts against the transmission element; or, one end of the first elastic element is connected to the second contact rod, and the other end abuts against the first contact rod.

[0009] As one possible implementation, the linkage includes a first sidewall with a first mating hole. The first sidewall and the first moving contact are located on the same side of the contact rod along its width direction. The transmission member extends into the first mating hole and engages with it. The first mating hole is an oblong hole so that the linkage and the transmission member can rotate and slide relative to each other.

[0010] As one possible implementation, the linkage part further includes a second sidewall with a third mating hole. The second sidewall and the second moving contact are located on the same side of the contact rod along its width direction. The transmission member extends into the third mating hole and mates with the third mating hole. The third mating hole is a round hole or an oblong hole.

[0011] As one possible implementation, the contact mechanism further includes a second elastic element, and the number of contact rods is two, namely a first contact rod and a second contact rod, with a first movable contact point disposed on the first contact rod and a second movable contact point disposed on the second contact rod; One end of the first elastic element is connected to the first contact rod, and the other end abuts against the transmission element; one end of the second elastic element is connected to the second contact rod, and the other end abuts against the transmission element. The linkage also includes a second sidewall with a third mating hole. The second sidewall and the second moving contact are located on the same side of the contact rod along its width direction. The transmission member extends into the third mating hole and mates with it. The third mating hole is an oblong hole, and the length of the major axis of the first mating hole is greater than the length of the major axis of the third mating hole.

[0012] As one possible implementation, the moving contact also includes a limiting part disposed at the second end and connected to the contact rod. The limiting part has a second mating hole. The housing is provided with a rotating shaft, which extends into the second mating hole and mates with it. The second mating hole is a round hole, and the limiting part can rotate relative to the rotating shaft; or, the second mating hole is an oblong hole, and the limiting part can rotate relative to the rotating shaft, and the limiting part can also slide relative to the rotating shaft along the long axis of the second mating hole.

[0013] As one possible implementation, the limiting part includes a third sidewall and a fourth sidewall. The third sidewall and the first moving contact are both disposed on one side of the contact rod along its width direction, and the fourth sidewall and the second moving contact are both disposed on the other side of the contact rod along its width direction. The third sidewall and the fourth sidewall are both provided with a second mating hole, and the two second mating holes at least partially overlap.

[0014] A second aspect of this application provides a load switch, including a magnetic circuit assembly, an armature assembly, an arc-extinguishing assembly, and the aforementioned contact mechanism. The magnetic circuit assembly, armature assembly, and arc-extinguishing assembly are all housed within a housing. The magnetic circuit assembly is connected to the armature assembly, and the armature assembly is connected to a moving contact via a transmission component. This load switch can prevent the increase in the path resistance between the moving and stationary contacts after prolonged use, reducing energy consumption and extending service life, while ensuring safety and reliability.

[0015] The beneficial effects of the embodiments of this application include: The contact mechanism includes a housing and a transmission component, a moving contact, a stationary contact, and a first elastic element disposed within the housing. The transmission component is movably connected to the moving contact and is used to drive the moving contact to open and close with the stationary contact. The moving contact includes a first moving contact and a second moving contact spaced apart along its width direction. The first elastic element is connected to the moving contact and is used to apply elastic force to the moving contact so that the first moving contact contacts the stationary contact before the second moving contact when closing, and separates from the stationary contact after the second moving contact when opening. The contact mechanism provided in this application, through a first moving contact and a second moving contact spaced apart along the width direction of the moving contact, and a first elastic element connected to the moving contact, enables the first moving contact to contact the stationary contact before the second moving contact when closing, and to separate from the stationary contact after the second moving contact when opening. This achieves the function of the first moving contact closing before the second moving contact. Thus, after prolonged use, only the first moving contact will be eroded, while the second moving contact will not. Since both the first and second moving contacts are in contact with the stationary contact after closing, although the resistance of the circuit formed by the first moving contact and the stationary contact will increase, the resistance of the circuit formed by the second moving contact and the stationary contact will not increase. That is, the overall resistance of the circuit formed by the moving contact and the stationary contact will not increase. Therefore, it can avoid the increase of the resistance of the circuit formed by the moving contact and the stationary contact after long-term use, reduce energy consumption, extend service life, and ensure safety and reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the load switch provided in the first embodiment of the present invention; Figure 2A schematic diagram of the contact mechanism provided in the first embodiment of this utility model when the first moving contact and the second moving contact are integrally formed; Figure 3 A schematic diagram of the contact mechanism provided in the first embodiment of this utility model when the first moving contact and the second moving contact are separately arranged; Figure 4 This is a schematic diagram of the contact mechanism provided in the first embodiment of the present utility model; Figure 5 This is a schematic diagram of the arc-extinguishing component in the load switch provided in the first embodiment of the present invention; Figure 6 A schematic diagram of the contact mechanism provided in the second embodiment of this utility model from one perspective; Figure 7 A schematic diagram of the contact mechanism provided in the second embodiment of this utility model from another perspective; Figure 8 This is a schematic diagram of the contact mechanism provided in the third embodiment of the present invention.

[0018] Icons: 10-Load switch; 100-Contact mechanism; 110-Housing; 111-Rotating shaft; 120-Transmission component; 121-Rotating shaft part; 130-Moving contact; 131-First moving contact; 132-Second moving contact; 134-Contact rod; 1341-First contact rod; 1342-Second contact rod; 135-Linkage part; 1351-First mating hole; 1352-First side wall; 1353-Third mating hole; 1354-Second side wall; 136-Limiting part; 1361-Second mating hole; 1362-Third side wall; 1364-Fourth side wall; 140-Stationary contact; 150-First elastic element; 200-Magnetic circuit assembly; 300-Armature assembly; 400-Arc extinguishing assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0025] First Embodiment Please refer to the reference. Figures 1 to 4 This utility model embodiment provides a contact mechanism 100 for realizing opening and closing of the circuit. It can avoid the increase of the path resistance formed by the moving contact 130 and the stationary contact 140 after long-term use, reduce energy consumption, extend service life, and is safe and reliable.

[0026] The contact mechanism 100 includes a housing 110 and a transmission member 120, a moving contact 130, a stationary contact 140, and a first elastic member 150 disposed within the housing 110. The transmission member 120 is movably connected to the moving contact 130 and is used to drive the moving contact 130 to open and close with the stationary contact 140. The moving contact 130 includes a first moving contact 131 and a second moving contact 132 spaced apart along its width direction. The first elastic member 150 is connected to the moving contact 130 and is used to apply a spring force to the moving contact 130 so that the first moving contact 131 contacts the stationary contact 140 before the second moving contact 132 when closing, and separates from the stationary contact 140 after the second moving contact 132 when opening.

[0027] The contact mechanism 100 provided in this application, through a first moving contact 131 and a second moving contact 132 spaced apart along the width direction of the moving contact 130, and a first elastic member 150 connected to the moving contact 130, enables the first moving contact 131 to contact the stationary contact 140 before the second moving contact 132 when closing, and enables the first moving contact 131 to separate from the stationary contact 140 after the second moving contact 132 when opening. This achieves the function of the first moving contact 131 closing before the second moving contact 132. In this way, after long-term use, only the first moving contact 131 will be burned, while the second moving contact 132 will not be burned. This prevents the path resistance formed by the moving contact 130 and the stationary contact 140 from increasing. Therefore, it can avoid the increase of the path resistance formed by the moving contact 130 and the stationary contact 140 after long-term use, reduce energy consumption, extend service life, and ensure safety and reliability.

[0028] The moving contact 130 includes a contact rod 134, a linkage part 135, and a limiting part 136. The contact rod 134 is rectangular and has a length direction and a width direction perpendicular to it. The contact rod 134 has a first end and a second end arranged opposite each other along its length direction. The linkage part 135 is located at the first end and is movably connected to the transmission member 120. A first moving contact 131 and a second moving contact 132 are both located at the first end. The first end is used to move around the second end under the drive of the transmission member 120. The limiting part 136 is located at the second end. Specifically, the linkage part 135 is movably connected to the transmission member 120, allowing the transmission member 120 to drive the entire moving contact 130 to move via the linkage part 135. The limiting part 136 is movably connected to the housing 110, allowing the limiting part 136 to move relative to the housing 110. The housing 110 can limit the limiting part 136, thereby limiting the entire moving contact 130.

[0029] Furthermore, the stationary contact 140 is located below the moving contact 130, the first moving contact 131 and the second moving contact 132 are both located on the lower side of the contact rod 134, and the linkage part 135 is located on the upper side of the contact rod 134. The transmission member 120 can drive the contact rod 134 to move upward or downward through the linkage part 135, so that the first moving contact 131 and the second moving contact 132 move upward or downward, thereby moving the first moving contact 131 and the second moving contact 132 away from or closer to the stationary contact 140, thereby realizing the opening or closing of the circuit breaker.

[0030] Please refer to Figure 3 In this embodiment, there is one contact rod 134. The first moving contact 131 and the second moving contact 132 are both disposed on the contact rod 134 and spaced apart along the width direction of the contact rod 134. Specifically, one end of the first elastic member 150 is connected to the side of the contact rod 134 where the first moving contact 131 is disposed along its width direction, and the other end abuts against the transmission member 120. The first elastic member 150 is always in a compressed state. During the opening and closing process, the transmission member 120 can apply elastic force to the contact rod 134 through the first elastic member 150, causing the contact rod 134 to tilt along its width direction. This results in the side of the contact rod 134 closer to the first moving contact 131 being lower than the side closer to the second moving contact 132, thereby making the first moving contact 131 lower than the second moving contact 132.

[0031] However, it is not limited to this; in other embodiments, such as... Figure 2 As shown, there is one contact rod 134. The first moving contact 131 and the second moving contact 132 are integrally formed to form a moving contact portion. The moving contact portion is disposed on the contact rod 134. During the closing process, the contact rod 134 tilts so that a part of the moving contact portion closer to the first moving contact 131 contacts the stationary contact 140 earlier than the other part.

[0032] In this way, during the closing process, the first moving contact 131 contacts the stationary contact 140 before the second moving contact 132; during the opening process, the first moving contact 131 separates from the stationary contact 140 after the second moving contact 132; even if an electric arc is generated during the opening and closing process, it will only be generated between the first moving contact 131 and the stationary contact 140, that is, only the first moving contact 131 will be burned, while no electric arc will be generated between the second moving contact 132 and the stationary contact 140, and the second moving contact 132 will not be burned. Since both the first moving contact 131 and the second moving contact 132 are in contact with the stationary contact 140 after the circuit is closed, although the resistance of the circuit formed by the first moving contact 131 and the stationary contact 140 will increase (the first moving contact 131 will be burned), the resistance of the circuit formed by the second moving contact 132 and the stationary contact 140 will not increase (the second moving contact 132 will not be burned). That is, the resistance of the circuit formed by the entire moving contact 130 and the stationary contact 140 will not increase. Therefore, it can avoid the increase of the resistance of the circuit formed by the moving contact 130 and the stationary contact 140 after long-term use, reduce energy consumption, extend service life, and ensure safety and reliability.

[0033] In one possible implementation, the linkage 135 includes a first sidewall 1352 with a first mating hole 1351. The first sidewall 1352 and the first moving contact 131 are located on the same side of the contact rod 134 along its width direction. The transmission member 120 extends into the first mating hole 1351 and engages with it. Specifically, the first mating hole 1351 is an oblong hole, allowing the linkage 135 and the transmission member 120 to rotate and slide relative to each other, so that the first moving contact 131 closes before the second moving contact 132, facilitating the tilting of the contact rod 134 along its width direction using the first elastic member 150.

[0034] Furthermore, the linkage 135 also includes a second sidewall 1354 with a third mating hole 1353. The second sidewall 1354 and the second moving contact 132 are located on the same side of the contact rod 134 along its width direction. The transmission member 120 extends into and mates with the third mating hole 1353, which is either a round hole or an oblong hole. The transmission member 120 is provided with a rotating shaft 121, which passes sequentially through the first mating hole 1351 of the first sidewall 1352 and the third mating hole 1353 of the second sidewall 1354. The rotating shaft 121 can rotate or slide simultaneously relative to both the first mating hole 1351 and the third mating hole 1353.

[0035] In this embodiment, the third mating hole 1353 is an oblong hole to avoid jamming between the rotating shaft 121 and the third mating hole 1353 when the moving contact 130 moves. The long axis directions of the first mating hole 1351 and the third mating hole 1353 are the same and at least partially overlap.

[0036] Specifically, the first sidewall 1352 and the first movable contact 131 are both located on one side of the contact rod 134 along its width direction, and the second sidewall 1354 and the second movable contact 132 are both located on the other side of the contact rod 134 along its width direction. The first elastic element 150 is a spring sheet, and the first elastic element 150 abuts against the end of the rotating shaft 121 near the first sidewall 1352. The rotating shaft 121 can apply elastic force to the contact rod 134 through the first elastic element 150, so that the contact rod 134 tilts along its width direction, thereby making the rotating shaft 121 slide in both the first mating hole 1351 and the third mating hole 1353 at the same time. The distance that the rotating shaft 121 slides in the first mating hole 1351 is greater than the distance that the rotating shaft 121 slides in the third mating hole 1353, ensuring that the side of the contact rod 134 near the first movable contact 131 along its width direction is lower than the side near the second movable contact 132, thereby ensuring that the first movable contact 131 closes first and then opens.

[0037] In this embodiment, the first mating hole 1351 of the first sidewall 1352 and the third mating hole 1353 of the second sidewall 1354 completely overlap to facilitate processing. However, this is not the only embodiment. In other embodiments, the first mating hole 1351 of the first sidewall 1352 and the third mating hole 1353 of the second sidewall 1354 partially overlap, and the lowest position of the rotating shaft 121 in the first mating hole 1351 corresponds to the highest position of the rotating shaft 121 in the third mating hole 1353 to reduce the overall opening area. The number of contact points on the stationary contact 140 is the same as the number of moving contacts on the moving contact 130 and they correspond one-to-one.

[0038] In one possible implementation, the limiting part 136 has a second mating hole 1361, and the housing 110 is provided with a rotating shaft 111. The rotating shaft 111 extends into and mates with the second mating hole 1361. The limiting part 136 can move relative to the housing 110 through the mating of the rotating shaft 111 and the second mating hole 1361, while the housing 110 can limit the limiting part 136 through the mating of the rotating shaft 111 and the second mating hole 1361, thereby limiting the moving contact 130. In this embodiment, the second mating hole 1361 is an oblong hole. The limiting part 136 can rotate relative to the rotating shaft 111, and the limiting part 136 can also slide relative to the rotating shaft 111 along the long axis of the second mating hole 1361 to accommodate the tilting action of the contact rod 134 along its width direction, avoiding interference with the tilting of the contact rod 134.

[0039] Furthermore, the limiting part 136 includes a third sidewall 1362 and a fourth sidewall 1364. The third sidewall 1362 and the first moving contact 131 are both disposed on one side of the contact rod 134 along its width direction, and the fourth sidewall 1364 and the second moving contact 132 are both disposed on the other side of the contact rod 134 along its width direction. The third sidewall 1362 and the fourth sidewall 1364 are both provided with a second mating hole 1361, and the two second mating holes 1361 at least partially overlap.

[0040] Specifically, the third sidewall 1362 and the first sidewall 1352 are arranged on the same side, and the fourth sidewall 1364 and the second sidewall 1354 are arranged on the same side. The rotating shaft 121 can apply a spring force to the contact rod 134 through the first elastic member 150, so that the contact rod 134 tilts along its width direction, thereby causing the rotating shaft 111 to slide in both second mating holes 1361 at the same time. The distance that the rotating shaft 111 slides in the second mating hole 1361 of the third sidewall 1362 is greater than the distance that the rotating shaft 111 slides in the second mating hole 1361 of the fourth sidewall 1364, ensuring that the side of the contact rod 134 closer to the first moving contact 131 along its width direction is lower than the side closer to the second moving contact 132.

[0041] In this embodiment, the second mating holes 1361 of the third sidewall 1362 and the second mating holes 1361 of the fourth sidewall 1364 partially overlap, and the lowest position of the rotating shaft 111 in the second mating hole 1361 of the third sidewall 1362 corresponds to the highest position of the rotating shaft 111 in the second mating hole 1361 of the fourth sidewall 1364, so as to reduce the overall opening area. However, this is not the only embodiment. In other embodiments, the second mating holes 1361 of the third sidewall 1362 and the second mating holes 1361 of the fourth sidewall 1364 completely overlap to facilitate processing.

[0042] Please refer to the reference. Figure 1 and Figure 5This utility model embodiment also provides a load switch 10, including a magnetic circuit assembly 200, an armature assembly 300, an arc-extinguishing assembly 400, and the aforementioned contact mechanism 100. The magnetic circuit assembly 200, armature assembly 300, and arc-extinguishing assembly 400 are all disposed within a housing 110. The magnetic circuit assembly 200 is connected to the armature assembly 300, and the armature assembly 300 is connected to the moving contact 130 via a transmission member 120. The armature assembly 300, driven by the magnetic circuit assembly 200, drives the moving contact 130 to move closer to or away from the stationary contact 140 via the transmission member 120, thereby achieving the closing or opening function. Furthermore, the arc-extinguishing assembly 400 is disposed on the side near the first moving contact 131. The arc-extinguishing assembly 400 is L-shaped or U-shaped and has two arc-inducing angles to effectively extinguish the arc when the first moving contact 131 and the stationary contact 140 are closed or opened. Since the structure and beneficial effects of the contact mechanism 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0043] Second Embodiment Please refer to the reference. Figure 6 and Figure 7 This utility model embodiment provides a contact mechanism 100. Compared with the first embodiment, the difference in this embodiment is that the number of moving contacts 130 is different.

[0044] In this embodiment, there are two contact rods 134, namely a first contact rod 1341 and a second contact rod 1342. The first contact rod 1341 and the second contact rod 1342 are arranged side by side and spaced apart along the width direction. The first moving contact 131 is disposed on the first contact rod 1341, and the second moving contact 132 is disposed on the second contact rod 1342. Specifically, one end of the first elastic member 150 is connected to the first contact rod 1341, and the other end abuts against the transmission member 120. During the opening and closing process, the transmission member 120 can apply elastic force to the first contact rod 1341 through the first elastic member 150, so that the first moving contact 131 disposed on the first contact rod 1341 is lower than the second moving contact 132 disposed on the second contact rod 1342.

[0045] In this way, during the closing process, the first moving contact 131 contacts the stationary contact 140 before the second moving contact 132; during the opening process, the first moving contact 131 separates from the stationary contact 140 after the second moving contact 132; even if an electric arc is generated during the opening and closing process, it will only be generated between the first moving contact 131 and the stationary contact 140, that is, only the first moving contact 131 will be burned, while no electric arc will be generated between the second moving contact 132 and the stationary contact 140, and the second moving contact 132 will not be burned.

[0046] However, this is not the only option. In other embodiments, the contact mechanism also includes a second elastic element (not shown). One end of the first elastic element 150 is connected to the first contact rod 1341, and the other end abuts against the transmission member 120. One end of the second elastic element is connected to the second contact rod 1342, and the other end abuts against the transmission member 120. Specifically, the third mating hole 1353 is an oblong hole, and the length of the major axis of the first mating hole 1351 is greater than the length of the major axis of the third mating hole 1353. That is, during the opening and closing process, the sliding distance of the rotating shaft 121 of the transmission member 120 in the first mating hole 1351 is greater than its sliding distance in the third mating hole 1353. At this time, the first elastic element 150 and the second elastic element are used to provide contact pressure for the first contact rod 1341 and the second contact rod 1342, respectively. In addition, the first elastic element 150 is also used to realize the function of the first moving contact 131 closing before opening compared to the second moving contact 132.

[0047] In this embodiment, the limiting part 136 on the first contact rod 1341 and the limiting part 136 on the second contact rod 1342 are separately provided, and the second mating hole 1361 is a round hole. Both limiting parts 136 can rotate relative to the rotating shaft 111. Since the two limiting parts 136 are independent of each other, it is only necessary to use the rotating shaft 111 to limit the rotation center of the two limiting parts 136. However, it is not limited to this. In other embodiments, the limiting part 136 on the first contact rod 1341 and the limiting part 136 on the second contact rod 1342 are integrally provided. In this case, the second mating hole 1361 is an oblong hole to cooperate in realizing that the first moving contact 131 provided on the first contact rod 1341 is lower than the second moving contact 132 provided on the second contact rod 1342, thereby realizing the function of the first moving contact 131 first closing and then opening compared to the second moving contact 132.

[0048] The beneficial effects of the contact mechanism 100 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0049] Third Embodiment Please refer to Figure 8 This utility model embodiment provides a contact mechanism 100. Compared with the second embodiment, the difference in this embodiment lies in the connection method of the first elastic member 150.

[0050] In this embodiment, one end of the first elastic element 150 is connected to the second contact rod 1342, and the other end abuts against the first contact rod 1341. The first elastic element 150 is always in a compressed state. During the opening and closing process, the second contact rod 1342 can apply elastic force to the first contact rod 1341 through the first elastic element 150, so that the first moving contact 131 on the first contact rod 1341 is lower than the second moving contact 132 on the second contact rod 1342. This also enables the first moving contact 131 to close first and then open compared to the second moving contact 132.

[0051] The beneficial effects of the contact mechanism 100 provided in this embodiment are the same as those in the second embodiment, and will not be repeated here.

[0052] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A contact mechanism, characterized in that, The device includes a housing (110) and a transmission member (120), a moving contact (130), a stationary contact (140), and a first elastic member (150) disposed within the housing (110). The transmission member (120) is movably connected to the moving contact (130) and is used to drive the moving contact (130) to open and close with the stationary contact (140). The moving contact (130) includes a first moving contact (131) spaced apart along its width direction and... The second moving contact (132) is connected to the first elastic element (150). The first elastic element (150) is used to apply elastic force to the moving contact (130) so that the first moving contact (131) contacts the stationary contact (140) before the second moving contact (132) when closing, and separates from the stationary contact (140) after the second moving contact (132) when opening.

2. The contact mechanism according to claim 1, characterized in that, The moving contact (130) further includes a contact rod (134) and a linkage part (135). The contact rod (134) has a first end and a second end arranged opposite to each other. The linkage part (135) is arranged at the first end and is movably connected to the transmission member (120). The first moving contact (131) and the second moving contact (132) are both arranged at the first end. The first end is used to move around the second end under the drive of the transmission member (120).

3. The contact mechanism according to claim 2, characterized in that, The number of the contact rod (134) is one. One end of the first elastic member (150) is connected to the side of the contact rod (134) where the first moving contact point (131) is provided along its width direction, and the other end abuts against the transmission member (120).

4. The contact mechanism according to claim 2, characterized in that, The number of the contact rods (134) is two, namely a first contact rod (1341) and a second contact rod (1342), the first moving contact (131) is disposed on the first contact rod (1341), and the second moving contact (132) is disposed on the second contact rod (1342); One end of the first elastic member (150) is connected to the first contact rod (1341), and the other end abuts against the transmission member (120); or, one end of the first elastic member (150) is connected to the second contact rod (1342), and the other end abuts against the first contact rod (1341).

5. The contact mechanism according to claim 2, characterized in that, The linkage part (135) includes a first sidewall (1352) with a first mating hole (1351). The first sidewall (1352) and the first moving contact (131) are located on the same side of the contact rod (134) along its width direction. The transmission member (120) extends into the first mating hole (1351) and is mated with the first mating hole (1351). The first mating hole (1351) is an oblong hole so that the linkage part (135) and the transmission member (120) can rotate and slide relative to each other.

6. The contact mechanism according to claim 5, characterized in that, The linkage part (135) further includes a second sidewall (1354) with a third mating hole (1353). The second sidewall (1354) and the second moving contact (132) are located on the same side of the contact rod (134) along its width direction. The transmission member (120) extends into the third mating hole (1353) and mates with the third mating hole (1353). The third mating hole (1353) is a round hole or an oblong hole.

7. The contact mechanism according to claim 5, characterized in that, The contact mechanism further includes a second elastic element. There are two contact rods (134), namely a first contact rod (1341) and a second contact rod (1342). The first moving contact (131) is disposed on the first contact rod (1341), and the second moving contact (132) is disposed on the second contact rod (1342). One end of the first elastic member (150) is connected to the first contact rod (1341), and the other end abuts against the transmission member (120); one end of the second elastic member is connected to the second contact rod (1342), and the other end abuts against the transmission member (120); The linkage part (135) further includes a second sidewall (1354) with a third mating hole (1353). The second sidewall (1354) and the second moving contact (132) are located on the same side of the contact rod (134) along its width direction. The transmission member (120) extends into the third mating hole (1353) and mates with the third mating hole (1353). The third mating hole (1353) is an oblong hole, and the length of the major axis of the first mating hole (1351) is greater than the length of the major axis of the third mating hole (1353).

8. The contact mechanism according to claim 2, characterized in that, The moving contact (130) further includes a limiting part (136) disposed at the second end and connected to the contact rod (134). The limiting part (136) is provided with a second mating hole (1361). The housing (110) is provided with a rotating shaft (111). The rotating shaft (111) extends into the second mating hole (1361) and is mated with the second mating hole (1361). The second mating hole (1361) is a round hole, and the limiting part (136) can rotate relative to the rotating shaft (111); or, the second mating hole (1361) is an oblong hole, and the limiting part (136) can rotate relative to the rotating shaft (111), and the limiting part (136) can also slide relative to the rotating shaft (111) along the long axis direction of the second mating hole (1361).

9. The contact mechanism according to claim 8, characterized in that, The limiting part (136) includes a third sidewall (1362) and a fourth sidewall (1364). The third sidewall (1362) and the first moving contact (131) are both disposed on one side of the contact rod (134) along its width direction. The fourth sidewall (1364) and the second moving contact (132) are both disposed on the other side of the contact rod (134) along its width direction. The third sidewall (1362) and the fourth sidewall (1364) are both provided with a second mating hole (1361). The two second mating holes (1361) at least partially overlap.

10. A load switch, characterized in that, The device includes a magnetic circuit assembly (200), an armature assembly (300), an arc-extinguishing assembly (400), and a contact mechanism as described in any one of claims 1-9. The magnetic circuit assembly (200), the armature assembly (300), and the arc-extinguishing assembly (400) are all disposed within the housing (110). The magnetic circuit assembly (200) is connected to the armature assembly (300), and the armature assembly (300) is connected to the moving contact (130) via the transmission member (120).

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