Moving contact system and load switch

Abstract

The utility model provides a moving contact system and a load switch, and relates to the technical field of low-voltage apparatuses, the moving contact system comprises a moving contact, a transmission mechanism and an elastic member, the moving contact is connected with the transmission mechanism through the elastic member, and the moving contact is driven to act through the transmission mechanism; the elastic piece is provided with a first acting point acting with the moving contact and a second acting point acting with the transmission mechanism. The transmission mechanism drives the moving contact to act so as to be contacted with or separated from the static contact, so that closing or opening is realized; in the process that the moving contact and the static contact are close to each other and make contact with each other, besides the action of the transmission mechanism on the moving contact, the moving contact and the static contact are made to make contact more tightly through elastic force provided by the elastic piece, so that reliable and stable contact of the moving contact and the static contact is achieved, stable closing is achieved, and normal work of a system is guaranteed. And through compact structural arrangement, the spatial size of the system is reduced so as to adapt to the development trend of miniaturization.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a moving contact system and a load switch. Background Art

[0002] A load switch is a switching device between a circuit breaker and an isolating switch. It can cut off the rated load current and a certain overload current. The load switch closes or opens the switch through the contact or separation of the moving contact and the static contact inside it.

[0003] When the current load switch is in closing operation, the moving contact is generally installed in the through hole of the contact support and is driven by the contact support to realize opening and closing with the static contact. The contact support is generally large in size and there is an unreliable contact between the moving contact and the static contact, which will lead to unstable closing and affect the normal operation of the load switch. Secondly, it has become a development trend for the load switch to make the size as small as possible while meeting relevant indicators. Utility Model Content

[0004] The purpose of the present application is to provide a moving contact system and a load switch to address the deficiencies in the above-mentioned prior art, which can ensure reliable contact between the moving contact and the static contact, improve the stability of closing, and reduce the spatial size of the system.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] According to one aspect of an embodiment of the present application, a moving contact system is provided, including a moving contact, a transmission mechanism and an elastic member, wherein the moving contact is connected to the transmission mechanism via the elastic member, and the moving contact is also used to connect to the transmission mechanism, and the moving contact is driven to move via the transmission mechanism; the elastic member has a first action point acting on the moving contact and a second action point acting on the transmission mechanism.

[0007] Optionally, the transmission mechanism includes a first transmission member and a second transmission member that are linked in sequence, the first transmission member is used to be connected to the driving mechanism, and the second transmission member is connected to the moving contact.

[0008] Optionally, a rotating shaft is further included, the moving contact and the second transmission member are connected to the housing via the rotating shaft, and the elastic member includes a contact spring sleeved on the rotating shaft.

[0009] Optionally, the moving contact has a contact end that acts on the static contact, and an extension end away from the contact end, one end of the elastic member abuts against the extension end to form the first action point, and the other end of the elastic member abuts against the second transmission member to form the second action point.

[0010] In one aspect of an embodiment of the present application, a load switch is provided, comprising a driving mechanism and the above-mentioned moving contact system which are arranged in sequence in linkage.

[0011] Optionally, the driving mechanism includes a pull rod and an output shaft connected to the pull rod, and the output shaft and the transmission mechanism of the moving contact system are driven by tooth meshing.

[0012] Optionally, the driving mechanism includes a swinging member, a convex rod is provided on the transmission mechanism of the moving contact system, and the swinging member has two extension arms to clamp the convex rod; or a convex rod is provided on the swinging member, and two extension arms are provided on the transmission mechanism of the moving contact system to clamp the convex rod.

[0013] Optionally, a micro switch is further included, and the micro switch is linked with the transmission mechanism of the moving contact system to feedback the working state of the moving contact.

[0014] Optionally, the transmission mechanism further includes a connecting rod, through which the first transmission member and the second transmission member of the transmission mechanism are connected, and the connecting rod further includes an extension arm extending toward the micro switch for linkage with the micro switch.

[0015] Optionally, a micro switch is further included, wherein the micro switch is located on one side of the driving mechanism, and the micro switch and the driving mechanism are linked to each other to provide feedback on the working state of the moving contact.

[0016] The beneficial effects of this application include:

[0017] The present application provides a moving contact system and a load switch, wherein the moving contact is connected to a transmission mechanism via an elastic member, and the transmission mechanism drives the moving contact to move so as to contact or separate from a stationary contact, thereby achieving closing or opening of the switch; the elastic member has a first point of action acting on the moving contact and a second point of action acting on the transmission mechanism, and in the process of the moving contact and the stationary contact coming into close contact, in addition to the action of the transmission mechanism itself on the moving contact, the elastic force provided by the elastic member promotes a closer contact between the moving contact and the stationary contact, thereby achieving reliable and stable contact between the moving contact and the stationary contact, achieving stable closing of the switch, and ensuring the normal operation of the system, and the moving contact system has a more compact structure, occupies less space, and can meet the needs of miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of a load switch provided in an embodiment of the present application;

[0020] Figure 2 A second structural diagram of a load switch provided in an embodiment of the present application;

[0021] Figure 3 A partial structural diagram of a load switch provided in an embodiment of the present application;

[0022] Figure 4 A third structural diagram of a load switch provided in an embodiment of the present application;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a fourth structural schematic diagram of a load switch provided in an embodiment of the present application.

[0025] Icon: 100-housing; 10-moving contact system; 11-moving contact; 11a-moving contact piece; 110-extension end; 12-elastic member; 13-static contact; 14-rotating shaft; 15-micro switch; 150-rotating arm; 151-pressing part; 20-transmission mechanism; 21-first transmission member; 210-convex rod; 22-connecting rod; 220-extension arm; 23-second transmission member; 230-slot; 30-driving mechanism; 31-pull rod; 32-output shaft; 33-swinging member. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] When the load switch is in closing operation, there may be a problem of unreliable contact between the moving contact and the static contact, which may lead to unstable closing.

[0033] In order to solve the above problems, one aspect of the embodiment of the present application provides a moving contact system 10, please refer to Figure 1 It includes a moving contact 11, a transmission mechanism 20 and an elastic member 12. The moving contact 11 is connected to the transmission mechanism 20 through the elastic member 12. The moving contact 11 is also used to connect to the transmission mechanism 20, and the moving contact 11 is driven to move through the transmission mechanism 20. The elastic member 12 has a first action point that acts on the moving contact 11 and a second action point that acts on the transmission mechanism 20.

[0034] The moving contact 11 and the stationary contact 13 cooperate, and the transmission mechanism 20 can drive the moving contact 11 to move, so that the moving contact 11 approaches or moves away from the stationary contact 13. When the moving contact 11 and the stationary contact 13 are close to each other, the system is closed; when the moving contact 11 and the stationary contact 13 are far away from each other, the system is opened.

[0035] In the present application, the moving contact 11 is connected to the transmission mechanism 20 via an elastic member 12, and the elastic member 12 has a first point of action with the moving contact 11 and a second point of action with the transmission mechanism 20; in the process of the transmission mechanism 20 driving the moving contact 11 to close the circuit, in addition to the transmission mechanism 20 itself providing a force to the moving contact 11 so that the moving contact 11 and the static contact 13 are in contact, the elastic member 12 also provides an additional elastic force to bring the moving contact 11 close to the static contact 13, so that the moving contact 11 can press the static contact 13 to achieve reliable contact between the moving contact 11 and the static contact 13.

[0036] Therefore, in the moving contact system 10 provided by the embodiment of the present application, the moving contact 11 is connected to the transmission mechanism 20 through the elastic member 12, and the transmission mechanism 20 drives the moving contact 11 to move to contact or separate with the static contact 13 to achieve closing or opening; the elastic member 12 has a first action point acting on the moving contact 11 and a second action point acting on the transmission mechanism 20. In the process of the moving contact 11 and the static contact 13 approaching each other, in addition to the action of the transmission mechanism 20 itself on the moving contact 11, the elastic force provided by the elastic member 12 also promotes the moving contact 11 and the static contact 13 to contact more closely, so that the moving contact 11 and the static contact 13 can be reliably and stably contacted, stable closing is achieved, and the normal operation of the system is ensured. In addition, due to the compact structural setting, the moving contact system 10 also occupies less space to adapt to the development trend of miniaturization.

[0037] In one implementation, the transmission mechanism 20 includes a first transmission member 21 and a second transmission member 23 that are linked in sequence. The first transmission member 21 is used to be connected to the driving mechanism 30 , and the second transmission member 23 is connected to the moving contact 11 .

[0038] In the prior art, the moving contact is also connected to a contact support, and the moving contact is inserted into a through groove of the contact support. The contact support is relatively large in size, while the second transmission member 23 in the present application is the contact support. It can be seen that the second transmission member 23 has the function of connecting the moving contact 11 as the existing contact support, and also has the function of transmitting power to drive the moving contact 11 to move as a transmission member. In this way, the two functions are integrated into one second transmission member 23, which makes the structure of the moving contact system 10 more compact.

[0039] In one embodiment, Figure 2 As shown, the elastic member 12 includes a contact spring; the moving contact system 10 is located in the housing 100, a rotating shaft 14 is provided in the housing 100, the moving contact 11 and the second transmission member 23 are both rotatably connected in the housing 100 via the rotating shaft 14, and the contact spring is sleeved on the rotating shaft 14.

[0040] The rotating shaft 14 passes through the moving contact 11 and the second transmission member 23 and is arranged in the housing 100 so that the moving contact 11 and the second transmission member 23 can rotate synchronously, and the contact spring is sleeved on the rotating shaft 14. The moving contact 11 rotates around the rotating shaft 14 under the drive of the transmission mechanism 20. After the moving contact 11 rotates to contact with the stationary contact 13, the moving contact 11 stops moving, and the second transmission member 23 continues to rotate under the driving action of the first transmission member 21 on the connecting rod 22, so that the contact spring generates additional compression, thereby providing additional elastic force to the moving contact 11, so that the moving contact 11 and the stationary contact 13 are reliably contacted.

[0041] Furthermore, the first transmission member 21 and the second transmission member 23 are connected by a connecting rod 22. The driving mechanism 30 drives the first transmission member 21 to move, and then transmits the driving force to the second transmission member 23 through the connecting rod 22. The second transmission member 23 is connected to the moving contact 11 through the rotating shaft 14, driving the moving contact 11 to rotate.

[0042] Among them, the moving contact 11 has a contact end that acts on the static contact 13, and an extension end 110 away from the contact end. One end of the elastic member 12 abuts against the extension end 110 to form a first action point, and the other end of the elastic member 12 abuts against the second transmission member 23 to form a second action point.

[0043] The bottom end of the moving contact 11 serves as a contact end for contacting the static contact 13. The top end of the moving contact 11 has an extension end 110 extending toward the top of the shell 100. One end of the contact spring abuts against the extension end 110 as a first action point, and the other end of the contact spring abuts against the second transmission member 23 as a second action point.

[0044] Furthermore, if Figure 3 As shown, the second transmission member 23 forms a slot 230 , and one end of the elastic member 12 abuts against the slot 230 .

[0045] In the present application, the moving contact 11 is formed into two separate moving contact pieces 11 a , the two moving contact pieces 11 a sandwich the second transmission member 23 , and the two moving contact pieces 11 a and the second transmission member 23 are connected as one through the rotating shaft 14 .

[0046] The two moving contact pieces 11a may be provided with only one contact spring together, or may be provided with contact springs separately, and the number of contact springs is not limited here. For example, in the present application, one contact spring is provided, and the contact spring is a double torsion spring, and the contact spring acts on the second transmission member 23 and the two moving contact pieces 11a, and the contact spring acts on one end of the second transmission member 23 to form an integral body, so that the two moving contact pieces 11a can act synchronously and maintain consistency.

[0047] On the other hand, an embodiment of the present application further discloses a load switch, comprising a driving mechanism 30, a transmission mechanism 20 and a moving contact system 10 as described above, which are sequentially linked.

[0048] The driving mechanism 30 provides a driving force, and transmits the driving force to the moving contact system 10 through the transmission mechanism 20, thereby driving the moving contact 11 to move.

[0049] In one embodiment, Figure 1 , Figure 2 As shown, the driving mechanism 30 includes a pull rod 31 and an output shaft 32 connected to the pull rod 31. The output shaft 32 and the transmission mechanism 20 are both provided with teeth, and the two are driven by the meshing of the teeth.

[0050] The pull rod 31 can realize translational movement, and the translation of the pull rod 31 drives the output shaft 32 to translate. The output shaft 32 is provided with teeth, and the first transmission member 21 is also provided with matching teeth. The output shaft 32 and the first transmission member 21 realize the transmission of the pull rod 31 and the output shaft 32 to the first transmission member 21 through the meshing of teeth.

[0051] In another embodiment, Figure 6 As shown, the driving mechanism 30 includes a swinging member 33 , a protruding rod 210 is disposed on the transmission mechanism 20 , and the swinging member 33 has two extending arms for clamping the protruding rod 210 .

[0052] The swing member 33 swings in the shell 100, and two extension arms are formed at one end of the swing member 33 toward the first transmission member 21. A protruding rod 210 is provided on the first transmission member 21, and the protruding rod 210 is clamped between the two extension arms of the swing member 33. When the swing member 33 swings, the protruding rod 210 drives the first transmission member 21 to move.

[0053] Of course, in other embodiments, the swing member 33 may be provided with a protruding rod 210 , and the transmission mechanism 20 may be provided with two extension arms for clamping the protruding rod 210 for power transmission, which will not be described in detail here.

[0054] On this basis, please refer to Figure 4 , and also includes a micro switch 15, which is linked with the transmission mechanism 20 to feedback the working state of the moving contact 11.

[0055] Specifically, the micro switch 15 is linked to the connecting rod 22 , and the connecting rod 22 passes through the second transmission member 23 and has an extension arm 220 extending toward the micro switch 15 , and is used to be linked to the micro switch 15 through the extension arm 220 .

[0056] When the first transmission member 21 drives the second transmission member 23 to move through the connecting rod 22, the connecting rod 22 not only drives the second transmission member 23 to move, but also drives the micro switch 15 to open and close. The micro switch 15 feeds back the working status of the moving contact 11, such as the closed state, the open state, whether the closing state is in place, etc.

[0057] like Figure 5 As shown, the micro switch 15 has a rotating arm 150, which is rotatably connected in the shell 100. The micro switch 15 also has a pressing portion 151, which is arranged toward the rotating arm 150. The rotating arm 150 and the extension arm 220 of the connecting rod 22 are linked. The movement of the connecting rod 22 drives the rotating arm 150 to rotate. The rotating arm 150 squeezes the pressing portion 151 to start the micro switch 15 to open, so that the micro switch 15 can obtain the working state of the moving contact 11.

[0058] In another embodiment, the micro switch 15 can also be set on one side of the driving mechanism 30, and the micro switch 15 and the driving mechanism 30 are linked; when the driving mechanism 30 is actuated, the micro switch 15 is driven to start so that the micro switch 15 is opened, and the micro switch 15 can also feedback the working status of the moving contact 11.

[0059] The load switch provided in the embodiment of the present application, the driving mechanism 30 and the transmission mechanism 20 drive the moving contact 11 to operate through a reliable direct-acting transmission method. The mechanism occupies a small space, which effectively reduces the volume of the load switch. In addition, by setting an elastic member 12, additional elastic force is provided to press the moving contact 11 and the static contact 13 together, so that the moving contact 11 and the static contact 13 are in reliable contact, thereby achieving stable closing.

[0060] The load switch comprises the same structure and beneficial effects as the moving contact system 10 in the above-mentioned embodiment. The structure and beneficial effects of the moving contact system 10 have been described in detail in the above-mentioned embodiment, and will not be repeated here.

[0061] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A moving contact system (10), characterized in that: The invention comprises a moving contact (11), a transmission mechanism (20) and an elastic member (12); the moving contact (11) is connected to the transmission mechanism (20) via the elastic member (12), and the moving contact (11) is driven to move via the transmission mechanism (20); the elastic member (12) has a first action point acting on the moving contact (11) and a second action point acting on the transmission mechanism (20).

2. The moving contact system (10) according to claim 1, characterized in that: The transmission mechanism (20) comprises a first transmission member (21) and a second transmission member (23) which are linked in sequence, wherein the first transmission member (21) is used to be connected to the driving mechanism (30), and the second transmission member (23) is connected to the moving contact (11).

3. The moving contact system (10) according to claim 2, characterized in that: It also includes a rotating shaft (14), the movable contact (11) and the second transmission member (23) are both connected to the housing (100) via the rotating shaft (14), and the elastic member (12) includes a contact spring sleeved on the rotating shaft (14).

4. The moving contact system (10) according to claim 2 or 3, characterized in that: The moving contact (11) has a contact end for acting with the stationary contact (13), and an extension end (110) away from the contact end; one end of the elastic member (12) abuts against the extension end (110) to form the first action point; and the other end of the elastic member (12) abuts against the second transmission member (23) to form the second action point.

5. A load switch, characterized in that: It comprises a driving mechanism (30) which is arranged in sequence and in linkage, and a moving contact system (10) as claimed in any one of claims 1 to 4.

6. The load switch according to claim 5, characterized in that: The driving mechanism (30) comprises a pull rod (31) and an output shaft (32) connected to the pull rod (31); the output shaft (32) and the transmission mechanism (20) of the moving contact system (10) are driven by tooth meshing.

7. The load switch according to claim 5, characterized in that: The driving mechanism (30) comprises a swinging member (33), a convex rod (210) is arranged on the transmission mechanism (20) of the moving contact system (10), and the swinging member (33) has two extension arms for clamping the convex rod (210); or a convex rod (210) is arranged on the swinging member (33), and the transmission mechanism (20) of the moving contact system (10) is provided with two extension arms for clamping the convex rod (210).

8. The load switch according to any one of claims 5 to 7, characterized in that: It also includes a micro switch (15), which is linked to the transmission mechanism (20) of the moving contact system (10) and is used to feedback the working state of the moving contact (11).

9. The load switch according to claim 8, characterized in that: The transmission mechanism (20) further comprises a connecting rod (22), wherein the first transmission member (21) and the second transmission member (23) of the transmission mechanism (20) are connected via the connecting rod (22), and the connecting rod (22) further comprises an extension arm (220) extending toward the micro switch (15) for linkage with the micro switch (15).

10. The load switch according to any one of claims 5 to 7, characterized in that: It also includes a micro switch (15), which is located on one side of the drive mechanism (30). The micro switch (15) and the drive mechanism (30) are linked to each other and are used to provide feedback on the working state of the moving contact (11).

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