A misclosing mechanism for plug-in circuit breaker

Abstract

The present invention discloses a misclosing mechanism for a plug-in circuit breaker, comprising a button, a cover, a buckle and a spring member, wherein a boss portion 1, a groove 1, a limiting surface 1 and a limiting rib 1 are provided on the cover, and a boss portion 2, a limiting rib 2, a groove 3, a limiting surface 3 and a limiting rib 3 are provided on the buckle, the buckle is installed in a groove 1 on the cover and installed in a base through the cover, the buckle is limited by a groove 1 on the cover, the spring member is installed on the boss portion 1, one end of the spring member acts on a limiting rib 1, and the other end acts on a groove 3 on the buckle; the boss portion 2 on the buckle can extend from one groove to the outside of the cover or retract into the cover. The misclosing mechanism of the present invention can prevent the potential safety hazards caused by the circuit breaker being inserted into a cabinet in a closed state, has a simple structure, is easy to operate and assemble, has high practicality, and has a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a current limiting and fast breaking structure of a small circuit breaker. Background Art

[0002] A circuit breaker is a mechanical switch that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain period of time and disconnect current under specified abnormal conditions. Therefore, it is widely used in power distribution systems.

[0003] There are three installation methods for circuit breakers: fixed, drawer and plug-in. With the continuous development and upgrading of power distribution systems, fixed circuit breakers are not convenient enough in installation, replacement and maintenance, and the application of plug-in circuit breakers has been increasing. In order to ensure the personal safety of operators during installation, use and replacement, the locking mechanism of plug-in circuit breakers is particularly important. The existing traditional locking mechanism mostly locks the circuit breaker on the cabinet through an external padlock or spring clip. If the circuit breaker needs to be replaced or removed, the additional tools must be removed, and it may be inserted or pulled out in the closed state, endangering the safety of the operator.

[0004] At present, fixed circuit breakers are the most widely used. With the upgrading and transformation of communication cabinets, the convenience advantage of plug-in circuit breakers is clearly demonstrated. In order to ensure the continuity of power supply, the cabinet power supply is often not cut off when replacing or installing one or part of the circuit breakers. Therefore, when the circuit breaker is in the closed state and inserted into the cabinet, there will be great safety hazards. For example, a locking mechanism of a plug-in circuit breaker disclosed in Chinese patent CN111180275A includes a shell, a button, a buckle and a reset spring. The button limits the buckle. When the circuit breaker is in the closed state, the buckle cannot be retracted into the shell. In an ideal state, it cannot be inserted into the cabinet; but in actual use, because the cabinet height size design leaves a margin, and the thickness of the cabinet sheet metal is thin, it is easy to deform after being stressed, so in the closed state, even if the buckle is extended, it can be forcibly inserted into the cabinet, which will cause safety hazards. Therefore, it is necessary to improve the original locking mechanism and add a reliable misclosing mechanism to solve the safety problems caused by closing and inserting from the root. Summary of the invention

[0005] The technical problem to be solved by the present invention is to solve the problem that the existing plug-in circuit breaker locking mechanism can also be inserted into a cabinet in the closed state, thereby providing a misclosing mechanism for a plug-in circuit breaker, which adds a misclosing function without affecting the function of the previous locking mechanism. When in use, the closing operation can only be performed when the circuit breaker is fully inserted into the cabinet; and when the circuit breaker is pulled out of the cabinet, the misclosing phenomenon is prevented, thereby fundamentally preventing the safety hazard of inserting the circuit breaker into the cabinet in the closed state, specifically a misclosing mechanism for a plug-in circuit breaker.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a misclosing mechanism of a plug-in circuit breaker includes a base, the misclosing mechanism includes a button, a cover, a buckle and a spring member, the cover is provided with a boss part 1, a connecting rib, a groove 1, a limiting surface 1 and a limiting rib 1, the buckle is provided with a boss part 2, a limiting rib 2, a groove 3, a limiting surface 3 and a limiting rib 3, the limiting surface 3 on the buckle matches the limiting surface 1 on the cover, the limiting rib 2 and the limiting rib 3 on the buckle are installed in the groove 1 on the cover through the corresponding boss part 2 and the limiting surface 3, and are installed in the base through the cover, the buckle is limited by the groove 1 on the cover, the spring member is installed on the boss part 1, one end of the spring member acts on the limiting rib 1, and the other end acts on the groove 3 on the buckle; the boss part 2 on the buckle can extend from the groove one to the outside of the cover or retract into the cover;

[0007] When the button is pulled toward the outside of the base, the buckle, under the action of the spring member, drives the buckle to slide relatively in the groove one, and the boss part two moves upward from one place in the groove through the buckle. When the boss part two on the buckle is pressed downward, the buckle moves downward along the groove one, and the upward movement of the buckle is limited by the cooperation of the limiting ribs two and three and the groove one on the cover and the base; and when the buckle moves downward for a certain distance, the limiting surface three contacts the limiting surface one to limit the downward movement of the buckle.

[0008] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein a second limiting surface and a second groove are provided on the buckle, and a fourth limiting surface corresponding to the second limiting surface is provided on the button; when the buckle is in a free state, a second boss portion on the buckle extends from one groove to the outside of the cover, and the second limiting surface on the buckle is used to limit the fourth limiting surface on the button, so that the button cannot move in the buckle direction, thereby achieving the circuit breaker being unable to perform a closing operation.

[0009] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein when the circuit breaker is inserted into a cabinet, the second boss portion on the buckle will be pressed down by the cabinet, so that the buckle moves toward the direction of the limiting surface on the cover, and the second limiting surface in the buckle and the fourth limiting surface in the button are in a separated state; by pulling the button to move it in the direction of the buckle, the fourth limiting surface on the button will pass through the second groove on the buckle, thereby enabling the circuit breaker to be closed.

[0010] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein when the circuit breaker is in a closed state, the button is pulled out to open the circuit breaker, and the button is disengaged from the second groove on the buckle; when the button is continued to be pulled out to pull the circuit breaker out of the cabinet, the buckle loses the limit imposed by the cabinet, and at the same time, under the action of the spring member, the second boss portion extends outwardly to the outside of the cover through the first groove on the cover, thereby realizing the buckle resetting process.

[0011] Furthermore, in the misclosing mechanism of a plug-in circuit breaker described in the present invention, the groove one and the groove two are both configured as U-shaped groove structures, and the groove three is configured as a through groove structure that passes through the buckle.

[0012] Furthermore, in the misclosing mechanism of a plug-in circuit breaker described in the present invention, the spring member is a torsion spring or a tension-compression spring.

[0013] Compared with the prior art, the misclosing mechanism of a plug-in circuit breaker of the present invention has the following beneficial effects: without affecting the function of the previous locking mechanism, the button is combined with the buckle and the cover to increase the closing function. During use, the closing operation can only be performed when the circuit breaker is fully inserted into the cabinet; and when the circuit breaker is pulled out of the cabinet, the buckle can automatically reset to limit the button operation and prevent misclosing, thereby fundamentally preventing the safety hazards caused by the circuit breaker being inserted into the cabinet in the closed state. The misclosing mechanism of the present invention has a simple structure, is easy to operate and assemble, has high practicality, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the installation structure of the buckle, torsion spring and cover described in the present invention;

[0017] Figure 3 is a schematic structural diagram of the cover of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the buckle described in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the button described in the present invention;

[0020] Figure 6 It is a schematic diagram of the installation position structure of the buckle on the circuit breaker in the present invention;

[0021] Figure 7 It is a schematic diagram of the internal structure of the circuit breaker of the present invention when it is not inserted into the cabinet;

[0022] Figure 8 It is a structural schematic diagram of the circuit breaker of the present invention in a closed state when it is fully inserted into the cabinet.

[0023] As shown in the figure: 1-button, 1a-limiting surface four, 1b-support surface, 2-cover, 2a-boss part one, 2b-connecting rib, 2c-groove one, 2d-limiting surface one, 2e-limiting rib one, 3-buckle, 3a-limiting surface two, 3b-boss part two, 3c-limiting rib two, 3d-groove two, 3e-groove three, 3f-limiting surface three, 3g-limiting rib three, 4-spring part. DETAILED DESCRIPTION

[0024] To further illustrate the concept of the present invention, the specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings:

[0025] like Figures 1 to 8 As shown, a misclosing mechanism of a plug-in circuit breaker described in the present invention includes a base, the misclosing mechanism includes a button 1, a cover 2, a buckle 3 and a spring member 4, the cover 2 is provided with a boss portion 2a, a connecting rib 2b, a groove 2c, a limiting surface 2d and a limiting rib 2e, the buckle 3 is provided with a boss portion 2b, a limiting rib 2c, a groove 3e, a limiting surface 3f and a limiting rib 3g, the limiting surface 3f on the buckle 3 matches the limiting surface 2d on the cover 2, the limiting rib 2c and the limiting rib 3g on the buckle 3 are installed in the groove 2c on the cover 2 through the corresponding boss portion 2b and the limiting surface 3f, and are installed in the base through the cover 2, the buckle 3 is limited by the groove 2c on the cover 2, the spring member 4 is installed on the boss portion 2a, and the spring member 4 One end acts on the limiting rib 2e, and the other end acts on the groove 3e on the buckle 3; the boss 2b on the buckle 3 can extend from the groove 2c to the outside of the cover 2 or retract into the cover 2; when the button 1 is pulled toward the outside of the base, the buckle 3 drives the buckle 3 to slide relatively in the groove 2c under the action of the spring member 4, and the boss 2b moves upward from the groove 2c through the buckle 3. When the boss 2b on the buckle 3 is pressed downward, the buckle 3 moves downward along the groove 2c, and the limiting rib 2c and the limiting rib 3g cooperate with the groove 2c on the cover 2 and the base to limit the upward movement of the buckle 3; and when the buckle 3 moves downward for a certain distance, the limiting surface 3f contacts the limiting surface 2d to limit the downward movement of the buckle 3.

[0026] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein a limiting surface 3a and a groove 3d are further provided on the buckle 3, and a limiting surface 14a corresponding to the limiting surface 3a is provided on the button 1, and a supporting surface 1b corresponding to the limiting surface 14a is provided on the button 1, and the supporting surface 1b is arranged along the longitudinal direction of the button 1; when the buckle 3 is in a free state, the boss 3b on the buckle 3 extends from the groove 2c to the outside of the cover 2, and the limiting surface 14a on the button 1 is restricted by the limiting surface 3a on the buckle 3, so that the button 1 cannot move in the direction of the buckle 3, thereby achieving the circuit breaker cannot be closed.

[0027] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein when the circuit breaker is inserted into a cabinet, the boss portion 3b on the buckle 3 will be pressed down by the cabinet, so that the buckle 3 moves toward the limit surface 2d on the cover 2, and the limit surface 2a in the buckle 3 and the limit surface 41a in the button 1 are in a separated state; by pulling the button 1 to make it move toward the buckle 3, the limit surface 41a on the button 1 will pass through the groove 23d on the buckle 3, thereby realizing the closing operation of the circuit breaker.

[0028] Furthermore, the present invention discloses a misclosing mechanism for a plug-in circuit breaker, wherein when the circuit breaker is in a closed state, the button 1 is pulled out to open the circuit breaker, and the button 1 is disengaged from the groove 2 3d on the buckle 3; when the button 1 is continued to be pulled out to pull the circuit breaker out of the cabinet, the buckle 3 loses the limit imposed by the cabinet, and at the same time, under the action of the spring member 4, the boss portion 2 3b extends outwardly from the outside of the cover 2 through the groove 1 2c on the cover 2, thereby realizing the resetting process of the buckle 3.

[0029] Furthermore, in the misclosing mechanism of a plug-in circuit breaker described in the present invention, the groove 1 2c and the groove 2 3d are both configured as U-shaped groove structures, and the groove 3 3e is configured as a through groove structure that passes through the buckle 3.

[0030] Furthermore, in the misclosing mechanism of a plug-in circuit breaker described in the present invention, the spring member 4 is a torsion spring or a tension-compression spring.

[0031] The misclosing mechanism of a plug-in circuit breaker according to the present invention comprises a button 1, a cover 2, a buckle 3 and a spring member 4, wherein the spring member 4 is a torsion spring, and the cover 2 is a partial structural schematic diagram; the specific working principle is as follows: since the buckle 3 is installed in a groove 2c on the cover 2, the buckle 3 can only slide in the groove 2c, and the buckle 3 moves upward under the action of the torsion spring 4, and when the buckle 3 is pressed, the buckle 3 moves downward along the groove 2c; the upward movement of the buckle 3 is limited by the cooperation of the limiting rib 2 3c and the limiting rib 3 3g with the cover 2 and the base, and in the free state, the boss 2 3b on the buckle 3 is always exposed outside the cover 2; the limiting surface 2 3a on the buckle 3 will limit the limiting surface 4 1a on the button 1, so that the button 1 cannot move in the direction of the buckle 3, thereby making the circuit breaker unable to perform the closing operation; when the limiting rib 2 3c and the limiting rib 3 3g are matched with the cover 2 and the base ... When the boss part 2b on the buckle 3 is pressed down, the buckle 3 moves downward for a certain distance, and the limit surface 3f contacts the limit surface 1 2d, thereby realizing the limit function of the buckle 3; when the circuit breaker is inserted into the cabinet, the boss part 2b on the buckle 3 will be pressed down by the cabinet, so that the buckle 3 moves in the direction of the limit surface 1 2d of the cover 2, and then the limit surface 2a will not limit the button 1; at this time, the button 1 is pulled out to move in the direction of the buckle 3, and the limit surface 41a on the button 1 will pass through the groove 2 3d on the buckle 2, and the product can be closed; when the circuit breaker is in the closed state, the button 1 is pulled out to open the circuit, and the button 1 will be separated from the groove 2 3d on the buckle 2; the button 1 is continued to be pulled out to pull the circuit breaker out of the cabinet, and the buckle 2 loses the limit of the cabinet. At the same time, under the action of the torsion spring, the boss part 2 3b pops out on the outside of the cover 2, thereby realizing the reset process.

[0032] In summary, the misclosing mechanism of the present invention can increase the closing function by combining the button 1 with the buckle 3 and the cover 2. During use, the closing operation can be performed only when the circuit breaker is fully inserted into the cabinet; and when the circuit breaker is pulled out of the cabinet, the buckle can automatically reset to limit the button operation and prevent misclosing, thereby fundamentally preventing the safety hazards caused by the circuit breaker being inserted into the cabinet in the closed state. The misclosing mechanism of the present invention has a simple structure, is easy to operate and assemble, has high practicality, and has a wide range of applications.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A misclosing mechanism for a plug-in circuit breaker, comprising a base, characterized in that: The misclosing mechanism comprises a button (1), a cover (2), a buckle (3) and a spring member (4); the cover (2) is provided with a boss portion (2a), a connecting rib (2b), a groove (2c), a limiting surface (2d) and a limiting rib (2e); the buckle (3) is provided with a boss portion (3b), a limiting rib (3c), a groove (3e), a limiting surface (3f) and a limiting rib (3g); the limiting surface (3f) on the buckle (3) matches the limiting surface (2d) on the cover (2); the limiting rib (3c) and the limiting rib (3g) on ​​the buckle (3) are connected to each other. The rib three (3g) is installed in the groove one (2c) on the cover (2) through the corresponding boss part two (3b) and the limiting surface three (3f), and is installed in the base through the cover (2); the buckle (3) is limited by the groove one (2c) on the cover (2); the spring member (4) is installed on the boss part one (2a); one end of the spring member (4) acts on the limiting rib one (2e), and the other end acts on the groove three (3e) on the buckle (3); the boss part two (3b) on the buckle (3) can extend from the groove one (2c) to the outside of the cover (2) or retract into the cover (2); When the button (1) is pulled toward the outside of the base, the buckle (3) is driven by the spring member (4) to slide relatively in the groove one (2c), and the boss part two (3b) is moved upward from the groove one (2c) by the buckle (3). When the boss part two (3b) on the buckle (3) is pressed downward, the buckle (3) moves downward along the groove one (2c), and the upward movement of the buckle (3) is limited by the cooperation of the limiting rib two (3c) and the limiting rib three (3g) with the groove one (2c) on the cover (2) and the base; and when the buckle (3) moves downward for a certain distance, the limiting surface three (3f) contacts the limiting surface one (2d) to limit the downward movement of the buckle (3); A second limiting surface (3a) and a second groove (3d) are also provided on the buckle (3), and a fourth limiting surface (1a) corresponding to the second limiting surface (3a) is provided on the button (1); when the buckle (3) is in a free state, the second boss (3b) on the buckle (3) extends from the first groove (2c) to the outside of the cover (2), and the second limiting surface (3a) on the buckle (3) is used to limit the fourth limiting surface (1a) on the button (1), so that the button (1) cannot move in the direction of the buckle (3), thereby achieving the circuit breaker being unable to perform a closing operation.

2. The misclosing mechanism of a plug-in circuit breaker according to claim 1, characterized in that: When the circuit breaker is inserted into the cabinet, the boss portion 2 (3b) on the buckle (3) will be pressed down by the cabinet, so that the buckle (3) moves in the direction of the limiting surface 1 (2d) on the cover (2), and the limiting surface 2 (3a) in the buckle (3) and the limiting surface 4 (1a) in the button (1) are separated; by pulling the button (1) to move it in the direction of the buckle (3), the limiting surface 4 (1a) on the button (1) will pass through the groove 2 (3d) on the buckle (3), so that the circuit breaker can be closed.

3. The misclosing mechanism of a plug-in circuit breaker according to claim 2, characterized in that: When the circuit breaker is in the closed state, the button (1) is pulled out to open the circuit breaker, and the button (1) is disengaged from the second groove (3d) on the buckle (3); when the button (1) is further pulled out to pull the circuit breaker out of the cabinet, the buckle (3) loses the position limit of the cabinet, and at the same time, under the action of the spring member (4), the second boss portion (3b) extends outwardly from the outside of the cover (2) through the first groove (2c) on the cover (2), thereby realizing the resetting process of the buckle (3).

4. The misclosing mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The groove one (2c) and the groove two (3d) are both arranged in a U-shaped groove structure, and the groove three (3e) is arranged in a through groove structure that passes through the buckle (3).

5. The misclosing mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The spring element (4) is a torsion spring or a tension-compression spring.

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