A closing energy storage mechanism of a miniature circuit breaker
By designing a closing energy storage mechanism with housing, handle, and damper in a miniature circuit breaker, the problems of slow closing speed and high cost are solved, achieving the effects of fast and stable closing and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YONGJI ELECTRICAL HLDG
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional miniature circuit breakers lack energy storage mechanisms, resulting in slow closing speeds, potential arcing, and reduced service life. Furthermore, existing energy storage mechanisms are complex, difficult to assemble, and costly.
Design a closing energy storage mechanism including a housing, handle, contact support and damper. The damper works in conjunction with the handle to achieve fast and stable closing of the contacts, simplifying the number of parts and the assembly process.
It enables fast and stable closing operations, reduces production costs, and improves the service life and ease of assembly of circuit breakers.
Smart Images
Figure CN224582224U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, and in particular to a closing energy storage mechanism for a miniature circuit breaker. Background Technology
[0002] In traditional miniature circuit breakers, since there is no energy storage mechanism, the closing operation can only be carried out manually. However, due to differences in human strength and operating speed, the closing speed may not be fast enough. Poor contact between the moving and stationary contacts can generate electric arcs, causing the contact material to melt and evaporate, resulting in a short service life for the miniature circuit breaker.
[0003] Therefore, a special energy storage mechanism was designed to ensure that each closing operation is performed according to design requirements, achieving fast and stable closing regardless of whether it is operated manually or automatically. However, existing energy storage mechanisms often have relatively complex structures, which are not only difficult to assemble but also have high production costs. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a closing energy storage mechanism for a small circuit breaker that is easy to assemble and has low production cost.
[0005] The present invention adopts the following technical solution:
[0006] This utility model provides a closing energy storage mechanism for a miniature circuit breaker, including a housing, a handle, a contact bracket, and a damper. A stationary contact is mounted on the housing. The handle and the contact bracket are both rotatably mounted on the housing. One axial end of the handle is recessed to form an arc-shaped groove. A moving contact and a contact spring are mounted on the contact bracket. The moving contact can contact or separate from the stationary contact. The contact spring can abut against the operating mechanism rotatably mounted on the housing of the miniature circuit breaker. The damper is limited on the housing. One end of the damper is close to the stationary contact and can abut against the contact bracket. The other end of the damper is accommodated in the arc-shaped groove and can release from abutment against the contact bracket when driven by the handle.
[0007] Preferably, a support column is formed on the housing, and the outer peripheral surface of the support column is concave to form a V-shaped notch extending along the axis, and the included angle between the two notch surfaces on the V-shaped notch is an obtuse angle. The handle is rotatably mounted on the support column, and the damper is located at one end of the arc groove and elastically abuts against the V-shaped notch through the abutting column.
[0008] Preferably, the damper is provided with an elastic hook, which engages in a slot in the housing.
[0009] Preferably, the housing is provided with abutment blocks and limiting posts at intervals, and the side of the abutment block facing the limiting post is an arc surface. The end of the damper near the stationary contact is located between the abutment block and the limiting post. When the contact bracket abuts against the damper, the damper rests against the arc surface of the abutment block.
[0010] Preferably, the housing has a positioning post between the support post and the limiting post, and the middle part of the damper is in contact with the positioning post.
[0011] Preferably, the contact support is provided with an energy storage limiting block, and the contact support abuts against the damper through the energy storage limiting block.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] After the closing energy storage mechanism of this utility model is installed on the miniature circuit breaker, the operating mechanism of the miniature circuit breaker can be rotated by turning the handle. The operating mechanism then drives the contact support to rotate through the contact spring. When the contact support rotates to abut against the damper, the contact spring will be continuously compressed and stored under the action of the operating mechanism as the handle continues to rotate. When the handle rotates to abut against one side of the arc-shaped groove, the damper will be released from contact with the contact support if the handle continues to rotate. After the contact support is no longer in contact with the damper, the contact spring will release energy to push the moving contact on the contact support to quickly abut against the stationary contact, achieving fast and stable closing.
[0014] Obviously, the closing energy storage mechanism of the miniature circuit breaker of this utility model can complete the fast and stable closing by simply setting a damper at the upper limit of the housing and using a handle. Since the number of parts is relatively small, it is easy to assemble and has a low production cost. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the closing energy storage mechanism of a miniature circuit breaker in an embodiment of this utility model.
[0016] Figure 2 This is a diagram showing the limit state of the damper on the closing energy storage mechanism of a miniature circuit breaker in an embodiment of this utility model.
[0017] Figure 3 This is a schematic diagram of the handle on the closing energy storage mechanism of a miniature circuit breaker in an embodiment of this utility model.
[0018] Figure 4 This is a schematic diagram of the structure of the contact support on the closing energy storage mechanism of a miniature circuit breaker in this embodiment of the present invention.
[0019] The reference numerals in the attached figures are explained as follows:
[0020] 1. Housing; 3. Contact support
[0021] 101, Support column 301, Energy storage limit block
[0022] 102. V-shaped notch 4. Damper
[0023] 103, Card slot 401, Abutment post
[0024] 104, Abutment Block 402, Elastic Hook
[0025] 105, Limit pin 5, Stationary contact
[0026] 106. Positioning pin 6. Moving contact
[0027] 2. Handle 7. Contact spring
[0028] 201. Arc-shaped groove Detailed Implementation
[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.
[0030] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 according to the specific circumstances.
[0032] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0033] See Figures 1 to 4This embodiment provides a closing energy storage mechanism for a miniature circuit breaker, including a housing 1, a handle 2, a contact bracket 3, and a damper 4. A stationary contact 5 is mounted on the housing 1. The handle 2 and the contact bracket 3 are both rotatably mounted on the housing 1. One axial end of the handle 2 is recessed to form an arc-shaped groove 201. A moving contact 6 and a contact spring 7 are mounted on the contact bracket 3. The moving contact 6 can contact or separate from the stationary contact 5. The contact spring 7 can abut against the operating mechanism rotatably mounted on the housing 1 of the miniature circuit breaker. The damper 4 is limited on the housing 1. One end of the damper 4 is close to the stationary contact 5 and can abut against the contact bracket 3. The other end of the damper 4 is accommodated in the arc-shaped groove 201 and can release from abutment against the contact bracket 3 under the action of the handle 2.
[0034] After the closing energy storage mechanism of the miniature circuit breaker in this embodiment is installed on the miniature circuit breaker, the operating mechanism of the miniature circuit breaker can be driven to rotate by turning the handle 2. The operating mechanism then drives the contact support 3 to rotate through the contact spring 7. When the contact support 3 rotates to abut against the damper 4, the contact spring 7 will be continuously compressed and stored under the action of the operating mechanism as the handle 2 continues to rotate. When the handle 2 rotates to abut against one side of the arc groove 201 and continues to rotate, the damper 4 will be released from abutment against the contact support 3. After the contact support 3 is no longer in contact with the damper 4, the contact spring 7 will release energy to push the moving contact 6 on the contact support 3 to quickly abut against the stationary contact 5, thereby achieving fast and stable closing.
[0035] Obviously, the closing energy storage mechanism of the miniature circuit breaker in this embodiment can achieve fast and stable closing by simply setting a damper 4 at the upper limit of the housing 1 and working with the handle 2. Since the number of parts is relatively small, it is easy to assemble and has a low production cost.
[0036] Preferably, see Figure 1 and Figure 2 A support column 101 is formed on the housing 1. The outer peripheral surface of the support column 101 is concave to form a V-shaped notch 102 extending along the axis, and the included angle between the two notch surfaces on the V-shaped notch 102 is an obtuse angle. The handle 2 is rotatably mounted on the support column 101. The damper 4 is located at one end of the arc groove 201 and elastically abuts against the V-shaped notch 102 through the abutment column 401.
[0037] After the contact between the contact bracket 3 and the damper 4 is released, during the process of resetting the handle 2 by rotating it again, the arc groove 201 on the handle 2 will contact the damper 4 and drive the contact post 401 back to the V-shaped notch 102. At this time, the damper 4 will re-elastically contact the V-shaped notch 102, thus resetting the damper 4.
[0038] In addition, it should be noted that the included angle between the two notch surfaces on the V-shaped notch 102 is an obtuse angle, which allows the abutment post 401 on the damper 4 to smoothly enter / exit the V-shaped notch 102 under the action of the handle 2; and when the damper 4 is reset, the elastic contact between the abutment post 401 and the V-shaped notch 102 can keep the position of the damper 4 after reset unchanged, ensuring the normal use of the closing energy storage mechanism of the miniature circuit breaker.
[0039] Preferably, see Figure 2 The damper 4 is provided with an elastic hook 402, which is engaged in the slot 103 of the housing 1, so that the abutment post 401 on the damper 4 is elastically abutted against the V-shaped notch 102 through the elastic hook 402.
[0040] Preferably, see Figure 1 and Figure 2 The housing 1 is provided with abutment block 104 and limit post 105 at intervals, and the side of abutment block 104 facing limit post 105 is arc surface. The end of damper 4 near stationary contact 5 is located between abutment block 104 and limit post 105. When contact bracket 3 abuts with damper 4, damper 4 is attached to the arc surface of abutment block 104.
[0041] Better, see Figure 2 In this embodiment, the slot 103 is located on the abutment block 104, and the elastic hook 402 on the damper 4 engages with the abutment block 104 on the housing 1.
[0042] Preferably, see Figure 2 In order to further limit the damper 4, the housing 1 is provided with a positioning post 106 between the support post 101 and the limiting post 105, and the middle part of the damper 4 is in contact with the positioning post 106.
[0043] Preferably, see Figure 4 The contact support 3 is provided with an energy storage limit block 301, and the contact support 3 abuts against the damper 4 through the energy storage limit block 301.
[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A closing energy storage mechanism of a miniature circuit breaker, characterized in that, The circuit includes a housing (1), a handle (2), a contact bracket (3), and a damper (4). A stationary contact (5) is mounted on the housing (1). The handle (2) and the contact bracket (3) are rotatably mounted on the housing (1). One axial end of the handle (2) is recessed to form an arc-shaped groove (201). A moving contact (6) and a contact spring (7) are mounted on the contact bracket (3). The moving contact (6) can contact or separate from the stationary contact (5). The contact spring (7) can abut against the operating mechanism rotatably mounted on the housing (1) of the miniature circuit breaker. The damper (4) is limited on the housing (1). One end of the damper (4) is close to the stationary contact (5) and can abut against the contact bracket (3). The other end of the damper (4) is accommodated in the arc-shaped groove (201) and can release its abutment against the contact bracket (3) under the action of the handle (2).
2. The closing energy storage mechanism of a miniature circuit breaker according to claim 1, characterized in that, A support column (101) is formed on the housing (1). The outer peripheral surface of the support column (101) is concave to form a V-shaped notch (102) extending along the axis. The included angle between the two notch surfaces on the V-shaped notch (102) is an obtuse angle. The handle (2) is rotatably mounted on the support column (101). The damper (4) is located at one end of the arc groove (201) and elastically abuts against the V-shaped notch (102) through the abutment column (401).
3. The closing energy storage mechanism of a miniature circuit breaker according to claim 2, characterized in that, The damper (4) is provided with an elastic hook (402), which engages in the slot (103) of the housing (1).
4. The closing energy storage mechanism of a miniature circuit breaker according to claim 2, characterized in that, The housing (1) is provided with abutment blocks (104) and limiting posts (105) spaced apart. The side of the abutment block (104) facing the limiting post (105) is an arc surface. The end of the damper (4) near the stationary contact (5) is located between the abutment block (104) and the limiting post (105). When the contact bracket (3) abuts against the damper (4), the damper (4) is attached to the arc surface of the abutment block (104).
5. The closing energy storage mechanism of a miniature circuit breaker according to claim 4, characterized in that, The housing (1) has a positioning post (106) between the support post (101) and the limiting post (105), and the middle part of the damper (4) is in contact with the positioning post (106).
6. The closing energy storage mechanism of a miniature circuit breaker according to claim 1, characterized in that, The contact support (3) is provided with an energy storage limiting block (301), and the contact support (3) abuts against the damper (4) through the energy storage limiting block (301).