Miniature circuit breaker

Abstract

The utility model discloses a miniature circuit breaker, comprising a housing, one side of which is provided with an operation handle in a reciprocating wrenching manner; an auxiliary mechanism is arranged on the outer wall of the shell and comprises a pulling assembly arranged at one end of the operating handle, and the pulling assembly is used for stretching the operating handle by a certain radian; the elastic assembly is arranged between the pulling assembly and the shell; the screw is arranged at the top of the elastic assembly and used for assisting in fixing the positions of the operating handle at different wrenching angles. According to the utility model, the operating handle is matched with the auxiliary mechanism, the pulling of the operating handle is not influenced by utilizing the elastic component and the pulling component, and the positions of different parts of the limiting rod on the elastic component are conveniently limited through the screw, so that the position of the operating handle in a certain pulling direction can be kept unchanged; therefore, the operating handle cannot be wrenched any more, and the use stability of the circuit breaker is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a small circuit breaker. Background Art

[0002] Miniature circuit breakers are mainly used for the control and isolation of low-voltage terminal power distribution in residential, industrial, construction and other fields, and for protecting low-voltage terminal distribution lines and electrical equipment from overload and short circuit. They can also be used for infrequent on-off operations.

[0003] Application No. 202123046600.6 discloses a small circuit breaker, including a housing, a pair of terminals and wiring ports corresponding to the terminals are respectively arranged at both ends of the housing, and an independent insulating partition is installed at at least one end of the housing, the insulating partition includes two isolation plates arranged at intervals and a connecting plate connecting the two isolation plates, the connecting plate is provided with a threading port corresponding to the wiring port, and the two isolation plates are used to isolate the terminals at the same end of two adjacent circuit breakers. Reduce the size and shorten the length of the wire, but when the operating handle is in the state of being pulled, the linkage operation of the operating mechanism can be directly performed by pulling the handle. When the circuit breaker is used in a safe power distribution system, the circuit breaker does not need the circuit breaker to break the circuit for power overload protection. Since the pulling of the operating handle is not restricted, outsiders can pull the operating handle at will, and the operating handle cannot be fixed, resulting in the operating handle being touched, which affects the accidental touch of the circuit breaker. Utility Model Content

[0004] The purpose of the utility model is to provide a small circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a small circuit breaker, comprising: a housing, one side of the housing having an operating handle for reciprocating movement;

[0006] The outer wall of the housing is provided with an auxiliary mechanism, and the auxiliary mechanism comprises:

[0007] A pulling component, which is arranged at one end of the operating handle and is used to stretch the operating handle to a certain arc;

[0008] An elastic component, wherein the elastic component is arranged between the pulling component and the housing;

[0009] A screw is arranged on the top of the elastic component and is used to assist in fixing the position of the operating handle at different turning angles.

[0010] Preferably, the pulling assembly comprises:

[0011] An insertion rod, the insertion rod is rotatably inserted into the handle end of the operating handle;

[0012] A plurality of top rods, one end of each of which is fixed to both ends of the interpenetrating rod;

[0013] A connecting rod, both ends of which are fixedly connected with the tops of the plurality of top rods, and the connecting rod simultaneously presses and pulls up the ends of the interpenetrating rods through the plurality of top rods;

[0014] A movable rod is rotatably inserted into the middle part of the connecting rod.

[0015] Preferably, the elastic component comprises:

[0016] A fixing block, wherein the fixing block is fixedly connected to the outer wall of the shell;

[0017] A limiting rod, the limiting rod is slidably inserted and connected to the middle part of the fixed block in a vertical direction;

[0018] A compression spring, wherein the compression spring is fixed to the bottom end of the fixed block;

[0019] A movable block is fixed to the bottom end of the compression spring and reciprocates on one side of the shell.

[0020] Preferably, the limiting rod is slidably connected to the inner cavity of the compression spring, and the bottom end of the limiting rod is fixedly connected to the top end of the movable block.

[0021] Preferably, the screw is threadedly inserted and connected to one side of the fixing block, and the screw is slidably inserted and connected to the top and bottom of the limiting rod.

[0022] Preferably, an operating mechanism is provided on one side of the inner cavity of the shell, and connection terminals are provided on both sides of the inner cavity of the shell.

[0023] Preferably, an electromagnetic solenoid is provided in the middle of the inner cavity of the shell, and an arc extinguishing chamber is provided on one side of the electromagnetic solenoid.

[0024] Technical effects and advantages of the utility model:

[0025] The utility model adopts the arrangement mode of matching the operating handle and the auxiliary mechanism, utilizes the elastic component and the pulling component, so that the turning of the operating handle is not affected, and the position of the limit rod on the elastic component is conveniently limited by the screw, so that the operating handle can maintain the position of a certain turning direction unchanged, and the operating handle can no longer be turned, thereby improving the stability of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0027] Figure 2It is a schematic diagram of the overall front structure of the utility model.

[0028] Figure 3 It is a front sectional structural schematic diagram of the utility model.

[0029] In the figure: 1. Shell; 2. Operating handle; 3. Auxiliary mechanism; 31. Pull assembly; 311. Insertion rod; 312. Push rod; 313. Connecting rod; 314. Movable rod; 32. Elastic assembly; 321. Fixed block; 322. Limiting rod; 323. Compression spring; 324. Movable block; 33. Screw; 4. Operating mechanism; 5. Terminal block; 6. Electromagnetic solenoid; 7. Arc extinguishing chamber. DETAILED DESCRIPTION

[0030] 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.

[0031] The utility model provides Figure 1-3 A miniature circuit breaker is shown, comprising:

[0032] The housing 1 has an operating handle 2 on one side of the housing 1, which is rotatably mounted on the outer wall of the housing 1. The operating handle 2 drives the operating mechanism 4 to drive the contacts of each action unit to perform the opening and closing actions of the circuit breaker.

[0033] Furthermore, an auxiliary mechanism 3 is provided on the outer wall of the housing 1, and the auxiliary mechanism 3 includes: a pulling component 31, an elastic component 32 and a screw 33. The pulling component 31 is provided at one end of the operating handle 2, and the pulling component 31 is used to stretch the operating handle 2 to a certain arc. The elastic component 32 is provided between the pulling component 31 and the housing 1, and the screw 33 is provided at the top of the elastic component 32. The screw 33 is used to assist in fixing the position of the operating handle 2 at different turning angles. In the case where the screw 33 is not used to limit the position of the elastic component 32, the elastic component 32 and the pulling component 31 do not affect the normal turning of the operating handle 2.

[0034] Specifically, the pulling assembly 31 includes: an interpenetrating rod 311, a plurality of push rods 312, a connecting rod 313 and a movable rod 314. The interpenetrating rod 311 is rotatably interpenetrated in the handle end of the operating handle 2. The plurality of push rods 312 are two push rods 312, one end of each of the two push rods 312 is respectively fixed to the two ends of the interpenetrating rod 311, and both ends of the connecting rod 313 are fixedly interpenetrated with the tops of the two push rods 312. The connecting rod 313 simultaneously presses and pulls up the ends of the interpenetrating rod 311 through the two push rods 312. The movable rod 314 is rotatably interpenetrated in the middle of the connecting rod 313. Through the pushing and pulling of the push rod 312, the operating handle 2 can perform a switch-on or switch-off operation.

[0035] Specifically, the elastic component 32 includes: a fixed block 321, a limiting rod 322, a compression spring 323 and a movable block 324, the fixed block 321 is fixedly connected to the outer wall of the shell 1, the limiting rod 322 is slidably inserted and connected to the middle part of the fixed block 321 in the vertical direction, the compression spring 323 is fixed to the bottom end of the fixed block 321, the movable block 324 is fixed to the bottom end of the compression spring 323, the limiting rod 322 is slidably connected to the inner cavity of the compression spring 323, the movable block 324 reciprocates on one side of the shell 1, the bottom end of the limiting rod 322 is fixedly connected to the top end of the movable block 324, and the movable block 324 is rotated and inserted into one end of the movable rod 314 through a pin shaft, that is, the movable block 324 The movable rod 314 is rotatably connected to one end of the movable rod 314. Through the setting of the movable rod 314, when the limiting rod 322 is pressed downward, the compression spring 323 is in an elastic recovery state, so that the movable block 324 is pressed downward, so that the movable rod 314 can press the two push rods 312 downward, so that the insertion rod 311 can press the operating handle 2 downward, and by pulling the operating handle 2 upward, the insertion rod 311 can push the movable rod 314 upward, so that the limiting rod 322 can slide with the fixed block 321, so that the compression spring 323 can be compressed, so that the limiting rod 322 is pushed out of the top of the fixed block 321, so that the operating handle 2 can perform stable opening and closing operations;

[0036] Specifically, the screw 33 is threadedly connected with one side of the fixing block 321, and the screw 33 is slidably connected with the top and bottom of the limiting rod 322, so that the screw 33 can limit the position of the top and bottom of the limiting rod 322, so that the top rod 312 can be stably limited, so that the operating handle 2 cannot be arbitrarily turned, so that the circuit breaker can be used safely and the phenomenon of the circuit breaker being accidentally touched is reduced;

[0037] Furthermore, an operating mechanism 4 is provided on one side of the inner cavity of the shell 1, and the operating mechanism 4 is linked to the operating handle 2 rotatably assembled on the shell 1. Terminals 5 are provided on both sides of the inner cavity of the shell 1, and an electromagnetic solenoid 6 is provided in the middle of the inner cavity of the shell 1. An arc extinguishing chamber 7 is provided on one side of the electromagnetic solenoid 6. A finished arc extinguishing device is provided in the arc extinguishing chamber 7 to extinguish the arc generated when the circuit breaker contact mechanism is disconnected, so that the small circuit breaker is suitable for places with an AC 50Hz rated working voltage of AC230V / 400V and a rated working current of 125A and below.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 miniature circuit breaker, comprising: A housing (1), one side of the housing (1) is provided with an operating handle (2) for reciprocating movement; The invention is characterized in that: an auxiliary mechanism (3) is provided on the outer wall of the housing (1), and the auxiliary mechanism (3) comprises: A pulling component (31), wherein the pulling component (31) is arranged at one end of the operating handle (2), and the pulling component (31) is used to stretch the operating handle (2) to a certain arc; An elastic component (32), wherein the elastic component (32) is arranged between the pulling component (31) and the housing (1); A screw (33) is arranged on the top of the elastic component (32), and the screw (33) is used to assist in fixing the position of the operating handle (2) at different turning angles.

2. A miniature circuit breaker according to claim 1, characterized in that: The pulling assembly (31) comprises: An insertion rod (311), the insertion rod (311) is rotatably inserted into the handle end of the operating handle (2); A plurality of push rods (312), one end of each of the push rods (312) being respectively fixed to two ends of the insertion rod (311); A connecting rod (313), both ends of which are fixedly connected to the tops of the plurality of top rods (312), and the connecting rod (313) simultaneously presses and pulls up the ends of the interpenetrating rods (311) through the plurality of top rods (312); A movable rod (314), wherein the movable rod (314) is rotatably inserted into the middle portion of the connecting rod (313).

3. A miniature circuit breaker according to claim 2, characterized in that: The elastic component (32) comprises: A fixing block (321), wherein the fixing block (321) is fixedly connected to the outer wall of the housing (1); A limiting rod (322), wherein the limiting rod (322) is slidably inserted and connected to the middle part of the fixing block (321) in a vertical direction; A compression spring (323), wherein the compression spring (323) is fixed to the bottom end of the fixing block (321); A movable block (324) is fixed to the bottom end of the compression spring (323), and the movable block (324) reciprocates on one side of the housing (1).

4. A miniature circuit breaker according to claim 3, characterized in that: The limiting rod (322) is slidably connected to the inner cavity of the compression spring (323), and the bottom end of the limiting rod (322) is fixedly connected to the top end of the movable block (324).

5. A miniature circuit breaker according to claim 3, characterized in that: The screw (33) is threadedly connected to one side of the fixing block (321), and the screw (33) is slidably connected to the top and bottom of the limiting rod (322).

6. A miniature circuit breaker according to claim 2, characterized in that: An operating mechanism (4) is arranged on one side of the inner cavity of the shell (1), and connection terminals (5) are arranged on both sides of the inner cavity of the shell (1).

7. A miniature circuit breaker according to claim 2, characterized in that: An electromagnetic solenoid (6) is arranged in the middle of the inner cavity of the housing (1), and an arc extinguishing chamber (7) is arranged on one side of the electromagnetic solenoid (6).

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