Manual unlocking mechanism of plug-in circuit breaker

Abstract

The utility model discloses a manual unlocking mechanism of a plug-in circuit breaker. The manual unlocking mechanism comprises a shell of the circuit breaker, a base and a false closing prevention device, the base is fixed in the shell; the false closing prevention device comprises a false closing prevention piece and a first reset spring, the false closing prevention piece is installed in the shell in an up-down sliding mode and located above the base, a protrusion capable of sliding out of or sliding into the shell is arranged at the top of the false closing prevention piece, one end of the first reset spring is fixed to the lower portion of the protrusion, and the other end of the first reset spring is fixed to the base; the unlocking device is arranged above the base; the unlocking device comprises a handle, an upper unlocking piece and a lower unlocking piece; one end of the handle is located outside the shell, and the other end of the handle extends to the side surface of the anti-false-closing piece; by adopting the manual unlocking mechanism of the plug-in circuit breaker, the switching-on state and the switching-off state of the circuit breaker can be ensured to be quickly switched to the greatest extent, and a large amount of time is saved for detecting the switching-on function and the switching-off function of the circuit breaker before the circuit breaker enters a cabinet.

Description

Technical Field

[0001] The utility model belongs to the field of low-voltage electrical appliance assembly, and in particular relates to a manual unlocking mechanism for a plug-in type circuit breaker. Background Art

[0002] With the rapid development of my country's power and communication technology, especially the application of 5G network technology, higher and higher requirements are placed on the practicality, safety and reliability of terminal electrical equipment such as circuit breakers. Traditional circuit breakers are far from meeting these requirements. In the continuous research and development, my country's circuit breakers have not only reached a new level in miniaturization, intelligence, and reliability, but also many new designs have appeared in the structure. For example, they can be plugged in and out and used as easily as ordinary electrical plugs, and the circuit breakers can be easily loaded into or removed from the circuit. They can be locked in a stable working state at the installation position. At the same time, the wiring direction of this circuit breaker and the wiring direction of the external wires are in the same plane. This is the plug-in circuit breaker. This circuit breaker can not only provide various safety protection measures for power lines, but also occupy a small space and can provide various intelligent usage requirements.

[0003] In order to protect the safety of workers, existing plug-in circuit breakers are usually equipped with an anti-misclosing device to lock the operating mechanism of the circuit breaker so that the circuit breaker is in an open state before it is inserted into the cabinet. However, in actual production, the circuit breaker usually undergoes a series of functional tests before leaving the factory to determine whether it meets the product standards. This includes testing its open and closed states before the circuit breaker is inserted into the cabinet. The existing testing method is to connect the circuit breaker to a line source and the other end to a detection device, and then press the top protrusion of the anti-misclosing device to unlock the circuit breaker operating mechanism and put it in a closed state, and record the data.

[0004] This detection method is not only time-consuming and labor-intensive, but also easily causes the circuit breaker to fail to close completely, resulting in deviations in the detection results and the need for repeated detection, which to a certain extent wastes a lot of manpower and material resources. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a manual unlocking mechanism for a plug-in circuit breaker. By setting an unlocking device fixedly connected to the anti-misclosing device, the anti-misclosing device can be pulled out and pushed in by the unlocking device when the circuit breaker is not placed in the cabinet, thereby controlling the closing and opening states of the circuit breaker, so that the closing and opening states of the circuit breaker are fully guaranteed during detection, providing a guarantee for comprehensive detection of the circuit breaker before leaving the factory; compared with the existing circuit breakers, the device created by the utility model has a simple structure and is easy to operate, and it is guaranteed to the greatest extent that the closing and opening states of the circuit breaker can be quickly converted, saving a lot of time for detecting the closing and opening functions of the circuit breaker before it enters the cabinet.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0007] A manual unlocking mechanism for a plug-in circuit breaker comprises a housing, a base and an anti-mistaken closing device of the circuit breaker; the base is fixed in the housing; the anti-mistaken closing device comprises an anti-mistaken closing member and a first reset spring, the anti-mistaken closing member is slidably installed in the housing and located above the base, a protrusion that can slide out or slide into the housing is provided on the top of the anti-mistaken closing member, one end of the first reset spring is fixed below the protrusion, and the other end is fixed on the base;

[0008] It also includes an unlocking device arranged above the base, the unlocking device includes a handle, an upper unlocking member and a lower unlocking member; one end of the handle is located outside the shell, and the other end extends to the side of the anti-misclosing member; the upper unlocking member is fixed to the other end of the handle; the lower unlocking member is fixed to the bottom of the anti-misclosing member and is located below the upper unlocking member; the upper unlocking member is provided with a first inclined surface; the lower unlocking member is provided with a second inclined surface; the first inclined surface and the second inclined surface cooperate with each other; the upper unlocking member unlocks or locks the anti-misclosing device by pulling out or pushing the lower unlocking member, so that the plug-in circuit breaker is in a closed or open state.

[0009] By providing an unlocking device fixedly connected to the anti-misclosing device, the closing and opening functions of the circuit breaker can be fully tested when the circuit breaker is not placed in the cabinet.

[0010] As a preferred embodiment of the present invention, a limiting hole is provided on the handle; and a limiting pin corresponding to the limiting hole is provided on the shell.

[0011] As a further preferred embodiment of the utility model, a accommodating chamber is opened in the middle of the handle; the bottom of the accommodating chamber is connected to the base; a fixed stopper is provided on the base and extends into the accommodating chamber; a spring pin is provided inside the accommodating chamber; a second return spring is sleeved on the spring pin; one end of the second return spring is fixed to the spring pin, and the other end is fixedly connected to the fixed stopper extending into the accommodating chamber.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: by providing an unlocking device fixedly connected to the anti-misclosing device, the closing and opening functions of the circuit breaker can be comprehensively tested when the circuit breaker is not placed in the cabinet; compared with the existing circuit breakers, the device studied by the utility model has a simple structure and is easy to operate, which ensures that the closing and opening states of the circuit breaker can be quickly converted to the greatest extent, saving a lot of time for testing the closing and opening functions of the circuit breaker before it enters the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a rear view of the utility model in a closed state;

[0014] Figure 2 This is the main view of the utility model in the closed state;

[0015] Figure 3 This is a rear view of the utility model in the open state;

[0016] Figure 4 It is the main view of the utility model in the open state.

[0017] As shown in the figure: 1-housing, 101-limiting pin, 2-base, 201-fixed block, 3-anti-misclosing device, 301-anti-misclosing member, 3011-protrusion, 302-first return spring, 4-unlocking device, 401-handle, 4011-limiting hole, 4012-accommodating chamber, 402-upper unlocking member, 4021-first inclined plane, 403-lower unlocking member, 4031-second inclined plane, 5-spring pin shaft, 6-second return spring, 7-handle, 8-connecting rod, 9-V-block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0019] like Figure 1-4 As shown, a manual unlocking mechanism of a plug-in circuit breaker comprises a housing 1 of the circuit breaker, a base 2 , an anti-misclosing device 3 and an unlocking device 4 ; the base 2 is fixed in the housing 1 .

[0020] The anti-misclosing device 3 includes an anti-misclosing component 301 and a first reset spring 302. The anti-misclosing component 301 is slidably installed in the shell 1 and is located above the base 2. A protrusion 301 that can slide out or slide into the shell 1 is provided on the top of the anti-misclosing component 301. One end of the first reset spring 302 is fixed below the protrusion 3011, and the other end is fixed on the base 2. By providing the first reset spring 302, it can be ensured that the top protrusion 301 of the anti-closing device 3 can be quickly reset to lock the circuit breaker in the open state.

[0021] The unlocking device 4 includes a handle 401 , an upper unlocking member 402 and a lower unlocking member 403 .

[0022] One end of the handle 401 is located outside the housing 1 , and the other end extends to the side of the anti-misclosing member 301 .

[0023] The upper unlocking member 402 is fixed to the other end of the handle 401 ; a first inclined surface 4021 is provided on the upper unlocking member 402 .

[0024] The lower unlocking member 403 is fixed to the bottom of the anti-misclosing member 301 and is located below the upper unlocking member 402 ; a second inclined surface 4031 is provided on the lower unlocking member 403 .

[0025] The first inclined surface 4021 and the second inclined surface 4031 cooperate with each other.

[0026] The upper unlocking member 402 unlocks or locks the misclosing prevention device 3 by pulling out or pushing the lower unlocking member 403 , thereby putting the plug-in circuit breaker in a closed or opened state.

[0027] Preferably, a limiting hole 4011 is provided on the handle 401 ; and a limiting pin 101 corresponding to the limiting hole 4011 is provided on the housing 1 .

[0028] Preferably, a receiving chamber 4011 is provided in the middle of the handle 401; the bottom of the receiving chamber 4011 is communicated with the base 2; a fixed stopper 201 is provided on the base 2 and extends into the receiving chamber 4011; a spring pin 5 is provided inside the receiving chamber 4011; a second return spring 6 is sleeved on the spring pin 5; one end of the second return spring 6 is fixed to the spring pin 5, and the other end is fixedly connected to the fixed stopper 201 extending into the receiving chamber 4011. By providing the second return spring 6, when the unlocking device pulls out the anti-misclosing device 3 to the right, the handle 401 can be quickly reset by the second return spring 6 when it is released.

[0029] In this embodiment, the unlocking device 4 is controlled to unlock or lock the anti-misclosing device 3; when the handle 401 is pulled out to the right, the anti-misclosing device 3 is driven to move to the right to be unlocked; thereby, the handle 7 in the circuit breaker housing 1 drives the operating mechanism connected to the V-block 9 through the connecting rod 8 to perform the circuit breaker closing operation; when the handle 401 is pushed to the left, the anti-misclosing device 3 is driven to move to the left to be locked; thereby, the handle 7 in the circuit breaker housing 1 drives the operating mechanism connected to the V-block 9 through the connecting rod 8 to perform the circuit breaker opening operation.

[0030] The working principle of the utility model is:

[0031] Step 1: first, press down the top protrusion 3011 of the anti-misclosing member 301;

[0032] Step 2, then drag the handle 401 of the unlocking device 4 to move the anti-misclosing device 3 to the right and enter the receiving hole;

[0033] Step 3, when the anti-misclosing device 3 is pulled to the right, the plug-in circuit breaker is in a closed state, and at this time, a functional test is performed on the plug-in circuit breaker in the closed state;

[0034] Step 4, when the protrusion 3011 of the anti-misclosing member 301 is exposed outside the circuit breaker housing 1, the plug-in circuit breaker is in the open state, and the open function of the circuit breaker should be tested before entering the cabinet;

[0035] Step 5, finally, after the detection is completed, the unlocking device 4 is pushed to the left, so that the protrusion 3011 of the anti-misclosing member 301 is exposed outside the circuit breaker housing 1, so that the circuit breaker is in the open state.

[0036] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A manual unlocking mechanism for a plug-in circuit breaker, comprising a housing (1), a base (2) and an anti-mis-closing device (3) of the circuit breaker; the base (2) is fixed in the housing (1); the anti-mis-closing device (3) comprises an anti-mis-closing member (301) and a first return spring (302); the anti-mis-closing member (301) is slidably mounted in the housing (1) and located above the base (2); a protrusion (3011) capable of sliding out of or into the housing (1) is provided on the top of the anti-mis-closing member (301); one end of the first return spring (302) is fixed below the protrusion (3011), and the other end is fixed on the base (2); the characteristics are: The invention also comprises an unlocking device (4) arranged above the base (2), the unlocking device (4) comprising a handle (401), an upper unlocking member (402) and a lower unlocking member (403); one end of the handle (401) is located outside the housing (1), and the other end extends to the side of the anti-mistaken closing member (301); the upper unlocking member (402) is fixed to the other end of the handle (401); the lower unlocking member (403) is fixed to the bottom of the anti-mistaken closing member (301) and is located at the upper unlocking member. The upper unlocking member (402) is provided with a first inclined surface (4021); the lower unlocking member (403) is provided with a second inclined surface (4031); the first inclined surface (4021) and the second inclined surface (4031) cooperate with each other; the upper unlocking member (402) unlocks or locks the anti-misclosing device (3) by pulling out or pushing in the lower unlocking member (403), thereby placing the plug-in circuit breaker in a closed or open state.

2. The manual unlocking mechanism of plug-in circuit breaker according to claim 1, characterized in that: The handle (401) is provided with a limiting hole (4011); and the housing (1) is provided with a limiting pin (101) corresponding to the limiting hole (4011).

3. The manual unlocking mechanism of plug-in circuit breaker according to claim 1, characterized in that: A receiving chamber (4012) is provided in the middle of the handle (401); the bottom of the receiving chamber (4012) is communicated with the base (2); a fixed stopper (201) is provided on the base (2) and extends into the receiving chamber (4012); a spring pin shaft (5) is provided inside the receiving chamber (4012); a second return spring (6) is sleeved on the spring pin shaft (5); one end of the second return spring (6) is fixed to the spring pin shaft (5), and the other end is fixed to the fixed stopper (201) extending into the receiving chamber (4012).

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