A contact mechanism, load switch and electricity meter

Abstract

The utility model discloses a kind of contact mechanism, load switch and electric meter, it is related to low-voltage electrical apparatus technical field.The contact mechanism includes shell and the moving contact, static contact and elastic member being set in shell, the one end of moving contact is connected with elastic member, the other end is used to be combined with static contact and be opened and closed, both ends of moving contact can be movable relative to static contact, elastic member is used to apply elastic force to moving contact in the opened and closed state to assist closing, elastic member is also used to apply elastic force to moving contact in the closed state to increase contact pressure.The contact mechanism can solve the problem that closing driving force is larger in prior art, energy consumption is higher, economic benefit is poorer, and contact pressure is smaller, reliability is poorer.

Description

Technical Field

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

[0002] Load switches are mainly used to break and close load currents. They can also be used in conjunction with high-voltage fuses to replace circuit breakers. Due to their ease of use and low cost, load switches are widely used in 10kV distribution network systems.

[0003] Currently, load switches typically utilize magnetic circuit components to drive armature components, thereby closing the moving and stationary contacts. However, current load switches have relatively large contact gaps (between the moving and stationary contacts), requiring significant driving force to achieve closing, resulting in high energy consumption and low economic efficiency. Furthermore, current load switches exhibit low contact pressure between the moving and stationary contacts when closed, making them prone to separation under external vibrations or environmental factors, leading to poor reliability. Therefore, there is an urgent need for a load switch product with lower energy consumption, higher economic efficiency, greater contact pressure, and stronger reliability. Utility Model Content

[0004] The purpose of this application is to provide a contact mechanism, load switch, and meter that can solve the problems of large closing driving force, high energy consumption, poor economic efficiency, low contact pressure, and poor reliability in the prior art.

[0005] The embodiments of this application are implemented as follows:

[0006] A first aspect of this application provides a contact mechanism, including a housing and a moving contact, a stationary contact, and an elastic element disposed within the housing. One end of the moving contact is connected to the elastic element, and the other end is used for opening and closing with the stationary contact. Both ends of the moving contact can move relative to the stationary contact. The elastic element is used to apply a spring force to the moving contact in the open state to assist in closing, and also to apply a spring force to the moving contact in the closed state to increase the contact pressure. This contact mechanism can solve the problems of high closing driving force, high energy consumption, poor economic efficiency, low contact pressure, and poor reliability in the prior art.

[0007] As one possible implementation, the moving contact includes a contact body, a connecting part, a movable part, and a linkage part connected in sequence. The movable part is movably engaged with the housing, the linkage part is connected with the elastic element, and the contact body is used to open and close with the stationary contact.

[0008] In one possible implementation, the movable part has an oblong hole, and the housing is provided with a guide post. The guide post extends into the oblong hole and cooperates with the oblong hole. The movable part can rotate relative to the guide post, and the movable part can also slide relative to the guide post along the long axis of the oblong hole.

[0009] As one possible implementation, the elastic element is a torsion spring, the housing is provided with a positioning post and a stop post, the positioning post and the stop post are spaced apart, the torsion spring is sleeved on the outside of the positioning post, one end of the torsion spring abuts against the stop post, and the other end abuts against the moving contact.

[0010] In one possible implementation, the elastic element is a compression spring, the housing is provided with a mounting part, one end of the compression spring is connected to the mounting part, and the other end is connected to the moving contact; or, the elastic element is a tension spring, the housing is provided with an assembly part, one end of the tension spring is connected to the assembly part, and the other end is connected to the moving contact.

[0011] As one possible implementation, the housing is provided with a limit post, which is disposed opposite to the stationary contact on both sides of the moving contact. The limit post is used to abut against the moving contact in the open state.

[0012] As one possible implementation, the contact mechanism further includes a lead-out member, which includes a first segment, a second segment, and a third segment connected in sequence. In the closed state, at least a portion of the first segment and at least a portion of the third segment are located on both sides of the moving contact in the thickness direction, and the current flows in opposite directions in the first segment and the third segment.

[0013] As one possible implementation, the contact mechanism further includes a first magnetizing element and a second magnetizing element, which are disposed opposite to each other on both sides of the moving contact in the width direction.

[0014] A second aspect of this application provides a load switch, including a magnetic circuit assembly, an armature assembly, a transmission component, and the aforementioned contact mechanism. The magnetic circuit assembly, armature assembly, and transmission component 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 the transmission component. This load switch addresses the problems of high closing driving force, high energy consumption, poor economic efficiency, low contact pressure, and poor reliability in the prior art.

[0015] A third aspect of this application provides an electricity meter including the load switch described above. This electricity meter can solve the problems of high closing driving force, high energy consumption, poor economic efficiency, low contact pressure, and poor reliability in the prior art.

[0016] The beneficial effects of the embodiments of this application include:

[0017] The contact mechanism includes a housing and a moving contact, a stationary contact, and an elastic element disposed within the housing. One end of the moving contact is connected to the elastic element, and the other end is used to open and close with the stationary contact. Both ends of the moving contact can move relative to the stationary contact. The elastic element is used to apply a spring force to the moving contact in the open state to assist in closing. The elastic element is also used to apply a spring force to the moving contact in the closed state to increase the contact pressure. The contact mechanism provided in this application, through a moving contact that can move relative to the stationary contact at both ends and an elastic element connected to the end of the moving contact away from the stationary contact, enables the elastic element to continuously apply elastic force to the moving contact during the closing process, thereby assisting the closing action of the moving contact. This effectively reduces the power required for the armature assembly to drive the moving contact to close, thereby reducing the driving force of the magnetic circuit assembly on the armature assembly, reducing energy consumption, and improving economic efficiency. On the other hand, it enables the elastic element to continuously apply elastic force to the moving contact in the closed state, pressing the moving contact against the stationary contact, increasing the contact pressure between the moving and stationary contacts, preventing the moving and stationary contacts from separating under the influence of external vibration or environmental factors, and improving the reliability of closing. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of the load switch provided in the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the load switch in the closed state provided in the first embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the load switch in the intermediate state of opening and closing provided in the first embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the load switch in the open state provided in the first embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the contact mechanism provided in the first embodiment of this utility model in the open state from a first-view perspective;

[0024] Figure 6 A schematic diagram of the contact mechanism provided in the first embodiment of this utility model in the open state from a second perspective;

[0025] Figure 7A third-view structural diagram of the contact mechanism provided in the first embodiment of this utility model in the open state;

[0026] Figure 8 This is a schematic diagram of the contact mechanism in the open state provided in the second embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the contact mechanism in the open state provided in the third embodiment of the present utility model.

[0028] Icons: 10-Load switch; 100-Contact mechanism; 110-Housing; 111-Guide column; 112-Positioning column; 113-Stop column; 114-Limiting column; 115-Mounting part; 116-Assembly part; 120-Moving contact; 121-Contact body; 122-Connecting part; 123-Moving part; 1231-Oval hole; 124-Linkage part; 130-Stationary contact; 140-Elastic element; 150-Lead-out element; 151-First section; 152-Second section; 153-Third section; 160-First magnetizing element; 170-Second magnetizing element; 200-Magnetic circuit assembly; 300-Armature assembly; 400-Transmission element. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] First Embodiment

[0036] Please refer to the reference. Figures 1 to 5 This utility model embodiment provides a contact mechanism 100 for realizing opening or closing of the circuit breaker. It can solve the problems of large closing driving force, high energy consumption, poor economic efficiency, low contact pressure, and poor reliability in the prior art.

[0037] The contact mechanism 100 includes a housing 110 and a moving contact 120, a stationary contact 130, and an elastic element 140 disposed within the housing 110. One end of the moving contact 120 is connected to the elastic element 140, and the other end is used for opening and closing with the stationary contact 130. Both ends of the moving contact 120 can move relative to the stationary contact 130. The elastic element 140 is always in a compressed state. The elastic element 140 is used to apply a spring force to the moving contact 120 in the open state to assist in closing. The elastic element 140 is also used to apply a spring force to the moving contact 120 in the closed state to increase the contact pressure.

[0038] The contact mechanism 100 provided in this application includes a moving contact 120 that can move relative to the stationary contact 130 at both ends, and an elastic element 140 connected to the end of the moving contact 120 away from the stationary contact 130. On the one hand, the elastic element 140 continuously applies a spring force to the moving contact 120 during the closing process to assist the closing action of the moving contact 120, thereby effectively reducing the power required for the armature assembly 300 to drive the moving contact 120 to close, and thus reducing the driving force of the magnetic circuit assembly 200 on the armature assembly 300, reducing energy consumption, and improving economic efficiency. On the other hand, the elastic element 140 continuously applies a spring force to the moving contact 120 in the closed state to press the moving contact 120 against the stationary contact 130, increasing the contact pressure between the moving contact 120 and the stationary contact 130, preventing the moving contact 120 and the stationary contact 130 from separating under the influence of external vibration or environmental factors, and improving the reliability of closing.

[0039] Specifically, the stationary contact 130 is located below the moving contact 120. The two ends of the moving contact 120 are referred to as the first end and the second end, respectively. The first end is connected to the elastic element 140, and the second end is used to open and close the circuit with the stationary contact 130. When the contact mechanism 100 is in the open state, the second end is spaced apart from the stationary contact 130. At this time, the second end is at its highest position and the first end is at its lowest position. The elastic element 140 applies an upward elastic force to the first end, so that the entire moving contact 120 has a rotational tendency, which helps the second end to close with the stationary contact 130, reduces driving force, reduces energy consumption, and improves economic efficiency. When the contact mechanism 100 is in the closed state, the second end is fitted with the stationary contact 130. At this time, the second end is at its lowest position and the first end is at its highest position. The elastic element 140 applies an upward elastic force to the first end, which also makes the entire moving contact 120 have a rotational tendency, pressing the second end and the stationary contact 130 together, increasing the contact pressure between the second end and the stationary contact 130, and improving the reliability of closing.

[0040] In one possible implementation, the moving contact 120 includes a contact body 121, a connecting portion 122, a movable portion 123, and a linkage portion 124 connected in sequence. The linkage portion 124 is located at the first end, and the contact body 121 is located at the second end. The contact body 121 is used for opening and closing with the stationary contact 130. The movable portion 123 is movably engaged with the housing 110, allowing it to move relative to the housing 110. The housing 110 can limit the movement of the movable portion 123, thereby limiting the entire moving contact 120. The linkage portion 124 is connected to an elastic member 140, which can apply a spring force to the linkage portion 124, thereby applying a spring force to the entire moving contact 120.

[0041] In one possible implementation, the movable part 123 is provided with an oblong hole 1231, and the housing 110 is provided with a guide post 111. The guide post 111 extends into the oblong hole 1231 and cooperates with it. The movable part 123 can move relative to the housing 110 through the cooperation of the guide post 111 and the oblong hole 1231, and the housing 110 can limit the movable part 123 through the cooperation of the guide post 111 and the oblong hole 1231, thereby limiting the moving contact 120. Specifically, the movable part 123 can rotate relative to the guide column 111 to adjust the angle between the moving contact 120 and the stationary contact 130. The movable part 123 can also slide relative to the guide column 111 along the long axis of the oblong hole 1231 to adjust the position of the moving contact 120 relative to the stationary contact 130. Through the rotation and sliding action of the movable part 123 relative to the guide column 111, the opening and closing functions of the moving contact 120 and the stationary contact 130 can be realized simply and efficiently.

[0042] It should be noted that when the contact mechanism 100 is in the closed state, the contact body 121 is fitted with the stationary contact 130, and the guide column 111 is located at the bottom of the waist-shaped hole 1231. At this time, the elastic element 140 applies an upward elastic force to the linkage part 124, so that the entire moving contact 120 has a tendency to rotate around the guide column 111. Since the linkage part 124 and the contact body 121 are arranged opposite to each other on both sides of the guide column 111, the contact body 121 will be pressed downward under the elastic force of the elastic element 140, thereby increasing the contact pressure between the contact body 121 and the stationary contact 130 and improving the reliability of closing.

[0043] In this embodiment, the elastic element 140 is a torsion spring. The housing 110 is provided with a positioning post 112 and a stop post 113, which are spaced apart. The torsion spring is sleeved on the positioning post 112, which is used to position the torsion spring to prevent it from becoming misaligned. One end of the torsion spring abuts against the stop post 113, and the other end abuts against the linkage part 124 of the moving contact 120. The torsion spring can continuously apply elastic force to the linkage part 124, so that the moving contact 120 has a rotational tendency.

[0044] In one possible implementation, the housing 110 is provided with a limit post 114. The limit post 114 and the stationary contact 130 are disposed opposite each other on both sides of the moving contact 120, that is, the limit post 114 is disposed above the moving contact 120. The limit post 114 is used to abut against the moving contact 120 in the open state to prevent the moving contact 120 from continuing to move upward and to ensure the stability of opening and closing.

[0045] It should be noted that when the contact mechanism 100 is in the open state, the contact body 121 and the stationary contact 130 are spaced apart, the connecting part 122 abuts against the limiting post 114, and the guide post 111 is located at the top of the waist-shaped hole 1231. At this time, the elastic element 140 applies an upward elastic force to the linkage part 124, so that the entire moving contact 120 has a tendency to rotate around the limiting post 114. Since the linkage part 124 and the contact body 121 are arranged opposite to each other on both sides of the guide post 111, the contact body 121 will move downward under the elastic force of the elastic element 140 to assist the closing action of the moving contact 120, thereby reducing the driving force, reducing energy consumption, and improving economic efficiency.

[0046] Furthermore, the orthographic projection of the limit post 114 onto the moving contact 120 is located at the middle of the moving contact 120. When the contact mechanism 100 is in the open state, the middle of the moving contact 120 abuts against the limit post 114 to improve the balance of the rotation of the moving contact 120 relative to the limit post 114 and ensure the stability of opening and closing.

[0047] Please refer to the reference. Figure 6 and Figure 7 As one possible implementation, the contact mechanism also includes a lead-out member 150. The lead-out member 150 includes a first segment 151, a second segment 152, and a third segment 153 connected in sequence. In the closed state, at least a portion of the first segment 151 and at least a portion of the third segment 153 are located on both sides of the moving contact 120 in the thickness direction, and the current flows in opposite directions in the first segment 151 and the third segment 153.

[0048] Specifically, when the moving contact 120 and the stationary contact 130 are closed, the stationary contact 130, the moving contact 120, the first section 151, the second section 152, and the third section 153 form an electrical circuit. Therefore, when the current flows sequentially through the stationary contact 130, the moving contact 120, the first section 151, the second section 152, and the third section 153, the first section 151 and the third section 153 are located on opposite sides of the thickness direction of the moving contact 120, i.e., the first section 151, the second section 152, and the third section 153 of the lead-out member 150. Section 153 is roughly C-shaped, so that the current flow through the first section 151 is opposite to the current flow through the third section 153. This ensures that the magnetic field generated by the current through these two sections exerts a force on the moving contact 120 towards the stationary contact 130, thereby preventing the moving contact 120 and the stationary contact 130 from being separated by repulsion in the event of an abnormal situation such as a short circuit. This ensures stable contact between the moving contact 120 and the stationary contact 130, improves the operational stability of the contact mechanism 100 and its ability to withstand short-circuit current.

[0049] As one possible implementation, the contact mechanism further includes a first magnetizing element 160 and a second magnetizing element 170. The first magnetizing element 160 and the second magnetizing element 170 are disposed opposite each other on both sides of the moving contact 120 in the width direction to further increase the contact force between the moving contact 120 and the stationary contact 130, thereby ensuring stable contact between the moving contact 120 and the stationary contact 130, and further improving the operational stability and short-circuit current withstand capability of the contact mechanism 100.

[0050] This application also provides a load switch 10, including a magnetic circuit assembly 200, an armature assembly 300, a transmission member 400, and the aforementioned contact mechanism 100. The magnetic circuit assembly 200, armature assembly 300, and transmission member 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 120 via the transmission member 400. 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.

[0051] This application also provides an electricity meter (not shown), including the load switch 10 described above. Since the structure and beneficial effects of the load switch 10 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0052] Second Embodiment

[0053] Please refer to Figure 8 This utility model embodiment provides a contact mechanism 100. Compared with the first embodiment, the difference in this embodiment is that the type of elastic element 140 is different.

[0054] In this embodiment, the elastic element 140 is a compression spring, and the housing 110 is provided with a mounting part 115. One end of the compression spring is rotatably connected to the mounting part 115, and the other end is rotatably connected to the moving contact 120. The compression spring can rotate simultaneously relative to the mounting part 115 and the moving contact 120. The mounting part 115 can limit the compression spring to prevent it from being misaligned. The compression spring can continuously apply elastic force to the linkage part 124 so that the moving contact 120 has a rotational tendency.

[0055] 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.

[0056] Third Embodiment

[0057] Please refer to Figure 9 This utility model embodiment provides a contact mechanism 100. Compared with the first embodiment, the difference in this embodiment is that the type of elastic element 140 is different.

[0058] In this embodiment, the elastic element 140 is a tension spring, and the housing 110 is provided with an assembly part 116. One end of the tension spring is rotatably connected to the assembly part 116, and the other end is rotatably connected to the moving contact 120. The tension spring can rotate simultaneously relative to the assembly part 116 and the moving contact 120. The assembly part 116 can limit the tension spring to prevent it from being misaligned. The tension spring can continuously apply elastic force to the linkage part 124 so that the moving contact 120 has a rotational tendency.

[0059] 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.

[0060] 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.

[0061] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A contact mechanism, characterized in that, The device includes a housing (110) and a moving contact (120), a stationary contact (130), and an elastic element (140) disposed within the housing (110). One end of the moving contact (120) is connected to the elastic element (140), and the other end is used to open and close the circuit with the stationary contact (130). Both ends of the moving contact (120) can move relative to the stationary contact (130). The elastic element (140) is used to apply a spring force to the moving contact (120) in the open state to assist in closing the circuit. The elastic element (140) is also used to apply a spring force to the moving contact (120) in the closed state to increase the contact pressure.

2. The contact mechanism according to claim 1, characterized in that, The moving contact (120) includes a contact body (121), a connecting part (122), a movable part (123), and a linkage part (124) connected in sequence. The movable part (123) is movably engaged with the housing (110), and the linkage part (124) is connected with the elastic member (140). The contact body (121) is used to open and close the circuit with the stationary contact (130).

3. The contact mechanism according to claim 2, characterized in that, The movable part (123) has an oblong hole (1231), and the housing (110) is provided with a guide post (111). The guide post (111) extends into the oblong hole (1231) and cooperates with the oblong hole (1231). The movable part (123) can rotate relative to the guide post (111), and the movable part (123) can also slide relative to the guide post (111) along the long axis of the oblong hole (1231).

4. The contact mechanism according to claim 1, characterized in that, The elastic element (140) is a torsion spring. The housing (110) is provided with a positioning post (112) and a stop post (113). The positioning post (112) and the stop post (113) are spaced apart. The torsion spring is sleeved on the positioning post (112). One end of the torsion spring abuts against the stop post (113), and the other end abuts against the moving contact (120).

5. The contact mechanism according to claim 1, characterized in that, The elastic element (140) is a compression spring, and the housing (110) is provided with a mounting part (115). One end of the compression spring is connected to the mounting part (115), and the other end is connected to the moving contact (120). Alternatively, the elastic element (140) is a tension spring, the housing (110) is provided with an assembly part (116), one end of the tension spring is connected to the assembly part (116), and the other end is connected to the moving contact (120).

6. The contact mechanism according to claim 1, characterized in that, The housing (110) is provided with a limiting post (114), which is disposed opposite to the stationary contact (130) on both sides of the moving contact (120). The limiting post (114) is used to abut against the moving contact (120) in the open state.

7. The contact mechanism according to claim 1, characterized in that, The contact mechanism further includes a lead-out member (150), which includes a first segment (151), a second segment (152), and a third segment (153) connected in sequence. In the closed state, at least a portion of the first segment (151) and at least a portion of the third segment (153) are located on both sides of the thickness direction of the moving contact (120), and the current flows of the first segment (151) and the third segment (153) are opposite.

8. The contact mechanism according to claim 1, characterized in that, The contact mechanism further includes a first magnetizing element (160) and a second magnetizing element (170), which are disposed opposite to each other on both sides of the moving contact (120) in the width direction.

9. A load switch, characterized in that, The device includes a magnetic circuit assembly (200), an armature assembly (300), a transmission component (400), and a contact mechanism as described in any one of claims 1-8. The magnetic circuit assembly (200), the armature assembly (300), and the transmission component (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 (120) via the transmission component (400).

10. An electricity meter, characterized in that, Includes the load switch as described in claim 9.

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