A small disconnect switch
By adopting a dual-spring structure for the moving and stationary contacts in the disconnecting switch, the problems of poor contact and complex assembly in traditional disconnecting switches are solved, thereby improving safety and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU JOVEAN & ROGY ELECTRICAL HOLDING CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-17
AI Technical Summary
The rigid contact between the moving and stationary contacts of traditional disconnect switches is prone to poor contact, and the complex energy storage structure makes production and assembly inconvenient.
The moving and stationary contacts are designed with a double-spring structure. The buffer spring provides elastic contact, and the opening spring pushes the moving contact plate open in case of interlock failure, thus avoiding electrical risks.
It simplifies the production and assembly process, reduces material costs, improves safety and stable contact of contacts, and avoids poor contact and electrical risks.
Smart Images
Figure CN224519714U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of switch technology, specifically to a small disconnect switch. Background Technology
[0002] In low-voltage power distribution systems in homes and industrial and mining enterprises, lines are often isolated from the power source, or used for switching isolation between two lines, thus requiring the use of low-voltage disconnect switches. Common disconnect switches have complex spring energy storage structures. They use a C-shaped latch on the operating handle to move the moving contact, achieving rapid closing of the bridge-type moving and stationary contacts. However, traditional disconnect switches still have some shortcomings, including their opening and closing relying entirely on the C-shaped latch, and the rigid contact between the moving and stationary contacts. Once the C-shaped latch ages or loosens, problems such as poor contact can easily occur, affecting the performance of the disconnect switch. Furthermore, the complex energy storage structure makes its production and assembly very inconvenient. Utility Model Content
[0003] In view of the prior art, the purpose of this utility model is to provide a small disconnect switch with a simple structure, which is convenient for production, assembly and use and has high safety.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a small disconnect switch, including a housing, an operating handle, and a moving contact assembly linked to the operating handle. The moving contact assembly includes a moving frame plate and a slot provided on the moving frame plate. The moving contact plate is disposed through the slot. A buffer spring is provided at the bottom of the slot to abut and push the moving contact plate to move. One end of two sets of I-shaped stationary contact plates provided inside the housing corresponds to the two ends of the moving contact plate. The lower end of the moving frame plate is also provided with an opening spring that abuts against the inner wall of the housing. The elastic force of the buffer spring is set to be greater than the elastic force of the opening spring in the maximum compression deformation state.
[0005] As a further feature of the above scheme, the moving contact plate is provided with a moving contact, and the stationary contact plate is provided with a stationary contact opposite to the moving contact. Under the action of the moving frame plate, the moving contact moves closer to and abuts against the stationary contact.
[0006] As a further feature of the above solution, the housing is provided with a mounting bracket and a mounting groove, and the stationary contact plate and the moving contact assembly are mounted in the mounting cavity of the housing through the mounting bracket and the mounting groove.
[0007] As a further feature of the above solution, the housing is provided with a wire groove and a wire clamping compartment on both sides. The stationary contact plate extends into the wire clamping compartment. One side of the stationary contact plate and the bottom surface opposite the wire clamping compartment are provided with teeth. The housing is provided with a tool groove that connects to the wire groove. A bolt is provided in the tool groove. The bolt is threadedly engaged with the wire clamping compartment. A wire stop plate is provided at the lower end of the wire clamping compartment. The bolt is used to drive the wire clamping compartment to move closer to or away from the stationary contact plate to hold the cable.
[0008] As a further feature of the above solution, a linkage buckle is hinged between the action handle and the moving frame plate. The action handle is provided with hinge shafts on both sides and is hinged to the housing, swinging relative to the housing. The linkage buckle cooperates with the opening spring to support and maintain the position of the moving frame plate.
[0009] As a further feature of the above solution, a guide plate is provided on one side of the moving frame plate, and a sliding groove is provided on the guide plate. An indicator is also hinged inside the housing. The indicator is provided with a hinge rod and a sliding rod, and the sliding rod extends into the sliding groove for sliding.
[0010] As a further feature of the above solution, the actuating handle is provided with two sets of limiting grooves, and the housing and the upper limiting groove opposite to the actuating handle are provided with limiting holes. The limiting holes are used to restrict the pins from penetrating and extending into the limiting grooves to limit the swing of the actuating handle. Beneficial effects: The disconnect switch of this utility model has a simple structure and is easy to assemble. The scientifically designed and improved internal structure can reduce material expenditure and production costs. The double-spring structure moving contact assembly set in the disconnect switch uses two sets of springs to achieve elastic contact between the moving contact and the stationary contact. The buffer spring can not only avoid contact plate deformation caused by rigid contact, but also maintain contact when the linkage buckle is slightly deformed. The opening spring at the bottom not only assists the linkage buckle and the action handle in realizing the slot, but also pushes open the moving contact plate when the linkage buckle fails, avoiding electrical risks and improving the safety of the disconnect switch. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the miniature disconnect switch of this utility model.
[0012] Figure 2 This is a schematic diagram of the internal structure of the disconnect switch in this embodiment.
[0013] Figure 3 This is a schematic diagram of the internal components of the disconnect switch in this embodiment.
[0014] Figure 4 This is a schematic diagram of the closed state structure of the disconnector switch in this embodiment.
[0015] Figure 5 This is a schematic diagram of the disconnector switch in the open state of this embodiment.
[0016] Reference numerals: 1. Housing; 11. Mounting bracket; 12. Mounting groove; 13. Mounting cavity; 14. Cover plate; 17. Restriction groove; 18. Restriction hole; 2. Actuating handle; 21. Hinge shaft; 3. Moving contact assembly; 31. Moving frame plate; 32. Plate groove; 33. Moving contact plate; 34. Buffer spring; 35. Opening spring; 37. Linkage buckle; 38. Stationary contact; 39. Moving contact; 4. Stationary contact plate; 41. Toothed groove; 42. Slide groove; 44. Indicator observation window; 45. Indicator element; 46. Hinge rod; 47. Slide rod; 5. Wire clamp compartment; 51. Wire stop plate; 52. Tool groove; 53. Bolt; 6. Wire groove. Detailed Implementation
[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.
[0018] like Figure 1-5 The small disconnect switch shown includes a housing 1, an actuating handle 2, and a movable contact group 3 linked to the actuating handle 2. The movable contact group 3 includes a movable frame plate 31 and a plate groove 32 located on the movable frame plate 31. A movable contact plate 33 is disposed through the plate groove 32. A buffer spring 34 is provided at the bottom of the plate groove 32 to abut against and push the movable contact plate 33 to move. One end of two sets of straight stationary contact plates 4 provided in the housing 1 corresponds to the two ends of the movable contact plate 33 respectively. The lower end of the movable frame plate 31 is also provided with an opening spring 35 that abuts against the inner wall of the housing 1. The elastic force of the buffer spring 34 is set to be greater than the elastic force of the opening spring 35 in the maximum compression deformation state.
[0019] As a further provision of the above scheme, the moving contact plate 33 is provided with a moving contact 39, and the stationary contact plate 4 is provided with a stationary contact 38 opposite to the moving contact 39. Under the drive of the moving frame plate 31, the moving contact 33 moves closer to and abuts against the stationary contact 38.
[0020] As a further provision of the above scheme, the housing 1 is provided with a mounting bracket 11 and a mounting groove 12, and the stationary contact plate 4 and the moving contact assembly 3 are fitted into the mounting cavity 13 of the housing 1 through the mounting bracket 11 and the mounting groove 12.
[0021] As a further provision of the above scheme, the housing 1 is also provided with wire grooves 6 and wire clamping chambers 5 on both sides. The stationary contact plate 4 extends into the wire clamping chamber 5. One side of the stationary contact plate 4 and the bottom surface opposite to the wire clamping chamber 5 are also provided with teeth 41. The housing 1 is provided with a tool groove 52 that connects to the wire grooves 6. A bolt 53 is provided in the tool groove 52. The bolt 53 is threadedly engaged with the wire clamping chamber 5. A wire stop plate 51 is also provided at the lower end of the wire clamping chamber 5. The bolt 53 is used to drive the wire clamping chamber 5 to move closer to or away from the stationary contact plate 4 to hold the cable.
[0022] As a further feature of the above scheme, a linkage buckle 37 is hinged between the action handle 2 and the moving frame plate 31. The action handle 2 is provided with hinge shafts 21 on both sides and is hinged to the housing 1, swinging relative to the housing 1. The linkage buckle 37 cooperates with the opening spring 35 to support and maintain the position of the moving frame plate 31.
[0023] As a further provision of the above scheme, a guide plate 36 is provided on one side of the moving frame plate 31. The guide plate 36 is provided with a sliding groove 42. An indicator 45 is also hinged inside the housing 1. The indicator 45 is provided with a hinge rod 46 and a sliding rod 47. The sliding rod 47 extends into the sliding groove 42 and slides.
[0024] As a further feature of the above solution, the action handle 2 is provided with two sets of limiting grooves 17, and the housing 1 and the limiting grooves 17 opposite to the action handle 2 are provided with limiting holes 18. The limiting holes 18 are used to limit the pin to penetrate into the limiting grooves 17 and limit the swing of the action handle 2.
[0025] refer to Figure 1 The miniature disconnect switch of this utility model shown in this embodiment includes a housing 1 and an actuating handle 2. A cover plate 14 is provided on the housing 1 to enclose the mounting cavity 13 of the housing 1, forming the inner cavity of the disconnect switch. A wire groove 6 and a tool groove 52 are also provided on the outer surface of the housing 1, and the tool groove 52 is connected to the wire groove 6 to link with the mounting cavity 13. In use, by connecting an external cable from... Figure 2 The wire grooves 6 on both sides of the housing 1 extend into the wire clamping chamber 5 within the wire grooves 6. A screwdriver or other tool is inserted through the tool slot 52 to drive the bolt 53 to rotate, causing the threaded clamping chamber 5 to rise and fall as a whole, clamping and securing the metal end of the cable, connecting the cable to the stationary contact plate 4. Then, the position of the moving frame plate 31 can be switched by moving the actuating handle 2, causing the moving contact plate 33 to approach and abut against the stationary contact plates 4 on both sides to complete the closing and electrical conduction. Conversely, moving the actuating handle 2 switches the position to open the circuit. It is worth noting that... Figure 4 and Figure 5As shown, when the action handle 2 is switched, the guide plate 36 provided on the lifting moving frame plate 31, through the sliding groove 42 with the sliding rod 47 extending into the guide plate 36, drives the indicator 45 to swing in linkage through the moving frame plate 31, thereby switching the indicator color on the front of the indicator 45, so that the operator can directly know the internal status through the indicator observation window 44 provided on the housing 1. In this embodiment, the indicator 45 is linked to the moving frame plate 31, and its status indicator switching is the same as the position change of the moving touch plate 33.
[0026] Further reference Figure 3 As shown, the housing 1 in this embodiment is also provided with a moving contact group 3. The moving contact group 3 is located in the corresponding position inside the mounting cavity 13 of the housing 1. The moving contact group 3 is linked with the action handle 2, and the moving contact 39 and the stationary contact 38 are contacted or separated by the lifting and lowering movement driven by the action handle 2, thereby controlling the opening or closing of the disconnect switch.
[0027] like Figure 3 The movable contact assembly 3 shown includes a movable frame plate 31 and a groove 32 located on the movable frame plate 31. A movable contact plate 33 is disposed through the groove 32. A buffer spring 34 is disposed at the bottom of the groove 32 to push the movable contact plate 33 to move. It is worth noting that the downward stroke of the movable frame plate 31 is greater than the distance between the movable contact 39 and the stationary contact 38. Therefore, when the movable contact plate 33 abuts against the stationary contact plate 4, the buffer spring 34 is pushed away and compressed by the stationary contact plate 4. The compressed buffer spring 34 continuously applies pressure to the movable contact plate 33. This setting not only keeps the contact between the movable contact plate 33 and the stationary contact plate 4 stable, but also buffers the contact and avoids the hidden danger of rigid contact. Furthermore, the advantage of this setting is that when the C-shaped linkage buckle 37 is slightly twisted or aged, the contact remains tightly fitted under the adaptive push of the buffer spring 34, thus completing the isolation and closing conduction.
[0028] Furthermore, in this embodiment, the two sets of stationary contact plates 4 arranged inside the housing 1 are in a straight line, which makes the structure simpler. Based on the short support conductive length of the mounting bracket 11, the material consumption is less and the production is convenient. One end of the stationary contact plate 4 corresponds to both ends of the moving contact plate 33, and the other end extends into the wire clamping compartment 5 for conductive conduction. The lower end of the moving frame plate 31 is also provided with an opening spring 35 that abuts against the inner wall of the housing 1. The elastic force of the buffer spring 34 is greater than the elastic force of the opening spring 35 in the maximum compression deformation state. During normal use, the moving frame plate 31 compresses the opening spring 35. The opening spring 35 can also keep the moving contact plate 33 away from the stationary contact plate 4 when the linkage buckle 37 breaks or fails to work, so as to avoid the moving contact 39 from making poor contact with the stationary contact 38 due to external vibration or gravity, which could lead to electrical risks.
[0029] As a further provision of the above scheme, the housing 1 is also provided with a wire groove 6 and a wire clamping compartment 5 on both sides. The stationary contact plate 4 extends into the wire clamping compartment 5. One side of the stationary contact plate 4 and the bottom surface opposite to the wire clamping compartment 5 are also provided with teeth 41. The housing 1 is provided with a tool groove 52 that connects to the wire groove 6. A bolt 53 is provided in the tool groove 52. The bolt 53 is threadedly engaged with the wire clamping compartment 5. A wire stop plate 51 is also provided at the lower end of the wire clamping compartment 5. The bolt 53 is used to drive the wire clamping compartment 5 to move closer to or away from the stationary contact plate 4 to hold the cable. As described above, the wire clamping compartment 5 in this embodiment is designed for the wire groove 6. It will produce a lifting action under the drive of the bolt 53. In order to avoid the external cable being mistakenly inserted into the gap between the bottom of the wire clamping compartment 5 and the inner wall of the wire groove 6 after the wire clamping compartment 5 is raised, this embodiment further provides a wire stop plate 51, so that the lower end of the wire clamping compartment 5 extends. After the wire clamping compartment 5 is raised, the wire stop plate 51 blocks the gap at the lower end of the wire groove 6.
[0030] As a further feature of the above solution, the actuating handle 2 is provided with two sets of limiting grooves 17, and the housing 1 is provided with limiting holes 18 on the limiting grooves 17 opposite to the actuating handle 2. The limiting holes 18 are used to restrict the swing of the actuating handle 2 by inserting a limiting pin through the limiting grooves 17. The purpose of this structure is that when the disconnect switch is used in a closed or open state for a long time, the operator can insert the limiting pin through the limiting hole 18 and fix it stably in the limiting groove 17. The swing of the actuating handle 2 relative to the housing 1 can be restricted by the limiting grooves 17 and the limiting hole 18 through which the limiting pin passes. When swing is required, the swing control can be restored by simply removing the limiting pin.
[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A small disconnect switch, comprising a housing (1), an actuating handle (2), and a moving contact assembly (3) linked to the actuating handle (2), characterized in that: The moving contact assembly (3) includes a moving frame plate (31) and a plate groove (32) located on the moving frame plate (31). A moving contact plate (33) is disposed through the plate groove (32). A buffer spring (34) is provided at the bottom of the plate groove (32) to push the moving contact plate (33) to move. One end of two sets of straight stationary contact plates (4) provided in the housing (1) corresponds to the two ends of the moving contact plate (33). The lower end of the moving frame plate (31) is also provided with an opening spring (35) that abuts against the inner wall of the housing (1). The elastic force of the buffer spring (34) is greater than the elastic force of the opening spring (35) in the maximum compression deformation state.
2. The miniature disconnect switch according to claim 1, characterized in that: The moving contact plate (33) is provided with a moving contact (39), and the stationary contact plate (4) is provided with a stationary contact (38) opposite to the moving contact (39). Under the drive of the moving frame plate (31), the moving contact plate (33) moves closer to and abuts against the stationary contact (38).
3. A miniature disconnect switch according to claim 1, characterized in that: The housing (1) is provided with a mounting bracket (11) and a mounting groove (12). The static contact plate (4) and the moving contact group (3) are fitted into the mounting cavity (13) of the housing (1) through the mounting bracket (11) and the mounting groove (12).
4. A miniature disconnect switch according to claim 1, characterized in that: The housing (1) is also provided with a wire groove (6) and a wire clamping compartment (5) on both sides. The stationary contact plate (4) extends into the wire clamping compartment (5). A tooth pattern (41) is provided on one side of the stationary contact plate (4) and on the bottom surface opposite to the wire clamping compartment (5).
5. A miniature disconnect switch according to claim 4, characterized in that: The housing (1) is provided with a tool slot (52) connected to the wire slot (6). The tool slot (52) is provided with a bolt (53). The bolt (53) is threadedly engaged with the wire clamping chamber (5). The lower end of the wire clamping chamber (5) is also provided with a wire stop plate (51). The bolt (53) is used to drive the wire clamping chamber (5) to move closer to or further away from the stationary contact plate (4) to hold the cable.
6. A miniature disconnect switch according to claim 1, characterized in that: The action handle (2) is hinged to the moving frame plate (31) by a linkage buckle (37). The action handle (2) is provided with hinge shafts (21) on both sides and is hinged to the housing (1). It is oscillating relative to the housing (1). The linkage buckle (37) and the opening spring (35) cooperate to support and maintain the position of the moving frame plate (31).
7. A miniature disconnect switch according to claim 1, characterized in that: A guide plate (36) is provided on one side of the moving frame plate (31). A sliding groove (42) is provided on the guide plate (36). An indicator (45) is also hinged inside the housing (1). The indicator (45) is provided with a hinge rod (46) and a sliding rod (47). The sliding rod (47) extends into the sliding groove (42) and slides.
8. A miniature disconnect switch according to claim 1, characterized in that: The action handle (2) is provided with two sets of limiting grooves (17), and the housing (1) and the limiting groove (17) opposite to the action handle (2) are provided with limiting holes (18). The limiting holes (18) are used to limit the pin to penetrate into the limiting groove (17) to limit the swing of the action handle (2).