A fixing and unlocking mechanism for a circuit breaker

Abstract

The present invention discloses a fixing and unlocking mechanism for a circuit breaker, which relates to the field of circuit breakers, and comprises a circuit breaker housing, a button and a limiter, wherein the limiter is elastically hingedly installed in the circuit breaker housing and is located above and in front of the button, a window is provided on the upper surface of the circuit breaker housing, a locking boss which can pass through the window is provided on the upper surface of the limiter, and the locking boss has a first state of extending out of the window to prevent the circuit breaker from entering a cabinet and a second state of retracting into the window to prevent the button from closing. The present invention has the advantages of good assembly reliability and good working stability.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and in particular to a fixing and unlocking mechanism for a circuit breaker. Background Art

[0002] Circuit breakers, as switches that provide various protective functions, can effectively improve the safety and reliability of electrical equipment and power lines. To meet increasingly diverse user needs, circuit breaker specifications are becoming increasingly diversified and miniaturized. 1. Existing circuit breakers can be directly connected to the circuit breaker while it is closed and not fully installed, which is detrimental to reliable and stable operation and poses a safety hazard. 2. Existing circuit breakers, once fully installed and powered, carry the risk of being accidentally disconnected, which is detrimental to the reliable operation of the circuit breaker and electrical equipment, and also poses a safety hazard. Summary of the Invention

[0003] In order to overcome the shortcomings of the background art, the present invention provides a fixing and unlocking mechanism for a circuit breaker with good assembly reliability and good working stability.

[0004] The technical solution adopted by the present invention is: a fixing and unlocking mechanism for a circuit breaker, which includes a circuit breaker housing, a button and a limit member, the limit member is elastically hingedly installed in the circuit breaker housing and is located in front of and above the button, the circuit breaker housing has a window on the upper surface, and the limit member has a locking boss on the upper surface that can pass through the window, the locking boss has a first state in which it extends out of the window to prevent the circuit breaker from entering the cabinet, and has a second state in which it retracts into the window to prevent the button from closing.

[0005] The limiting member is provided with a rotating shaft, the rotating shaft is rotatably mounted in the circuit breaker housing, and the locking boss is located at the front side of the rotating shaft.

[0006] A limiting boss is provided on the lower surface of the limiting member, and a contact boss is provided at the front end of the button. When the limiting member is retracted into the window, the limiting boss is located right in front of the contact boss.

[0007] An elastic member is provided in the circuit breaker housing. One end of the elastic member is fixed to the circuit breaker housing, and the other end is fixed to the limiting member and provides a pre-tightening force for the limiting member to extend upward out of the window.

[0008] The upper surface of the contact boss is provided with an inclined surface for avoiding the limiting member.

[0009] The circuit breaker housing is provided with an unlocking clip at a position behind the limiter, the front end of the unlocking clip is inserted into the circuit breaker housing, and the rear end thereof is exposed outside the circuit breaker housing. The unlocking clip is provided with a resistance portion extending straight forward, the upper surface of the front end of the resistance portion is a sloped surface, and the rear end of the limiter is an arcuate surface. The resistance portion has a first state in which it moves forward to contact the rear end of the limiter and drives the limiter to rotate clockwise along the sloped surface, and a second state in which it moves backward to separate from the limiter.

[0010] The unlocking buckle is provided with an elastic positioning portion located on one side of the abutting portion. The circuit breaker housing is provided with a plurality of positioning grooves corresponding to the elastic positioning portion. The end of the elastic positioning portion is an arc surface.

[0011] An operating boss for manual pushing is provided at the rear end of the unlocking buckle, and the operating boss is higher than the upper surface of the circuit breaker housing.

[0012] The unlocking buckle is provided with a first positioning surface facing the circuit breaker housing in the vertical direction, and the circuit breaker housing is provided with a second positioning surface facing the first positioning surface, and both the first positioning surface and the second positioning surface are arranged obliquely.

[0013] The elastic positioning portion is symmetrically arranged on both sides of the interference portion.

[0014] The beneficial effects of the present invention are as follows: the technical solution prevents the circuit breaker from being pulled out after being assembled in place by setting a limiter; when the circuit breaker is in the closed state, the limiter cooperates with the button to prevent the circuit breaker from being installed in place, which has the advantage of improving the assembly reliability and working stability of the small circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the fixing and unlocking mechanism of the circuit breaker according to an embodiment of the present invention.

[0016] Figure 2 A top view of the fixing and unlocking mechanism of the circuit breaker.

[0017] Figure 3 A schematic diagram of the unlocking buckle.

[0018] Figure 4 It is a structural diagram of the limiter.

[0019] Figure 5 The figure is a structural diagram of the fixing and unlocking mechanism of the circuit breaker in the unlocking position.

[0020] Figure 6 It is a top view of the fixing and unlocking mechanism of the circuit breaker in the unlocked position.

[0021] Figure 7This is a structural diagram of the fixing and unlocking mechanism of the circuit breaker in the locked position and not closed.

[0022] Figure 8 The diagram is a structural diagram of the fixing and unlocking mechanism of the circuit breaker in the locked position and closed.

[0023] Figure 9 A schematic diagram of the button structure. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0025] As shown in the figure, a fixing and unlocking mechanism for a circuit breaker includes a circuit breaker housing 1, a button 2, and a limiter 3. The limiter 3 is elastically hingedly mounted within the circuit breaker housing 1 and located above and in front of the button 2. A window 11 is provided on the upper surface of the circuit breaker housing 1. A locking boss 31 is provided on the upper surface of the limiter 3, which can pass through the window 11. The locking boss 31 has a first state in which it extends from the window 11 to prevent the circuit breaker from entering the cabinet, and a second state in which it retracts into the window 11 to prevent the button 2 from being closed. This technical solution prevents the circuit breaker from being removed after it is assembled by providing a limiter. When the circuit breaker is in the closed state, the limiter cooperates with the button to prevent the circuit breaker from being installed in place, thereby improving the assembly reliability and operating stability of the miniature circuit breaker.

[0026] The front upper part mentioned in this embodiment can refer to Figure 1 The position distribution in the middle is that the limiter is located in front of the button and above the button.

[0027] The limiting member 3 is provided with a rotating shaft 32, which is rotatably mounted in the circuit breaker housing 1. The locking boss 31 is located in front of the rotating shaft 32. The rotating shaft is rotatably arranged. When the limiting member is in a horizontal state, as shown in FIG. Figure 6 As shown, the locking boss is exposed outside the circuit breaker housing through the window. When the limiter rotates to the tilted state, as shown in FIG. Figure 4 As shown, the locking boss retraction window is hidden inside the circuit breaker housing.

[0028] A limiting boss 33 is provided on the lower surface of the limiting member 3, and a contact boss 21 is provided at the front end of the button 2. When the limiting member 3 is retracted into the window 11, the limiting boss 33 is located directly in front of the contact boss 21. In this state, the limiting member will block the forward path of the button and prevent the button from closing. When the limiting member extends out of the window, it will no longer block the forward path of the button and the button can be closed. The structure of the torsion spring and the rotating shaft in this embodiment constitutes the elastic hinge structure mentioned above.

[0029] An elastic member 4 is provided in the circuit breaker housing 1. One end of the elastic member 4 is fixed to the circuit breaker housing 1, and the other end is fixed to the limit member 3 and provides a preload force for the limit member 3 to extend upward through the window 11. The elastic member is a torsion spring, and the movable end of the torsion spring presses against the lower surface of the limit member to provide an upward preload force for the limit member.

[0030] The upper surface of the contact boss 21 is provided with an inclined surface 22 for avoiding the stopper 3. When the stopper rotates downward, its lower surface is inclined. Therefore, in order to ensure that the stopper is completely retracted into the window without interference, this embodiment adopts a method of machining an inclined surface for avoiding the stopper on the contact boss.

[0031] There is another embodiment, which is to dig an avoidance groove on the lower surface of the limiting member to avoid the contact boss, which can also achieve the same technical effect.

[0032] The circuit breaker housing 1 is provided with an unlocking buckle 5 at the rear of the limit member 3, the front end of the unlocking buckle 5 is inserted into the circuit breaker housing 1, and the rear end thereof is exposed outside the circuit breaker housing 1, and the unlocking buckle 5 is provided with a resistance portion 51 extending straight forward, the upper surface of the front end of the resistance portion 51 is a sloped surface, and the rear end of the limit member 3 is an arc surface. The resistance portion 51 has a first state in which it moves forward to contact the rear end of the limit member 3 and drives the limit member 3 to rotate clockwise along the sloped surface, and a second state in which it moves backward to separate from the limit member 3. When the unlocking buckle is pressed inward, the limit member is pushed to rotate, and the limiting boss of the limit member blocks the button to prevent the circuit breaker from closing.

[0033] The unlocking clip 5 is provided with an elastic positioning portion 52 located on one side of the abutting portion 51. The circuit breaker housing 1 is provided with a plurality of positioning grooves 12 corresponding to the elastic positioning portion 52. The end of the elastic positioning portion 52 is an arc surface, and the elastic positioning portions 52 are symmetrically arranged on both sides of the abutting portion 51. The positioning grooves in this embodiment are divided into two gears, corresponding to the two states of pressing and pulling out the unlocking clip. When the unlocking clip is pressed into the circuit breaker, the elastic positioning portion uses the elasticity of its plastic material to cross the slope and enter the next positioning groove. The positioning groove offsets the preload force from the limiter and the elastic member, allowing the abutting portion to overcome the preload force of the elastic member and keep the limiter in an inclined state, blocking the button and preventing the circuit breaker from closing.

[0034] When the unlocking buckle is pulled out, the abutting portion is disengaged from the limiting member, and the limiting member is reset by the elastic member.

[0035] The rear end of the unlocking buckle 5 is provided with an operating boss 53 for manual pushing. The operating boss 53 is higher than the upper surface of the circuit breaker housing 1 and is pushed by manual pressing.

[0036] The unlocking buckle 5 has a first positioning surface 54 facing the circuit breaker housing 1 in the vertical direction. The circuit breaker housing 1 has a second positioning surface 13 facing the first positioning surface 54 . Both the first positioning surface 54 and the second positioning surface 13 are inclined.

[0037] When the circuit breaker is in the open state, the restricting member is pressed against the outer shell by the action of the elastic member, and the locking boss of the restricting member is exposed outside the circuit breaker housing; when the circuit breaker is pushed into the cabinet, the locking boss of the restricting member is pressed down by the cabinet, and the circuit breaker is pushed into the cabinet. When the circuit breaker is pushed into place, the locking boss of the restricting member is stuck in the through hole on the cabinet under the action of the elastic member. When the circuit breaker is installed in place, push the button to close, and the circuit breaker can be closed.

[0038] If the circuit breaker is not installed in place, the locking boss of the limiting piece is pressed down by the cabinet, and the limiting boss of the limiting piece presses against the button, and the button cannot be closed.

[0039] When the circuit breaker is not inserted into the cabinet and is in the closed state, the limiting boss of the limiting member presses on the contact boss of the button; the locking boss is exposed outside the window. When the circuit breaker is pushed into the cabinet, the locking boss will act as a block, preventing the circuit breaker from being pushed into the cabinet.

[0040] When disassembling the circuit breaker, you need to press the unlocking buckle inward. At this time, the limiting piece rotates under the push of the unlocking buckle, and the locking boss retracts into the window. When the unlocking buckle is stuck and cannot be pushed forward (that is, when the first positioning surface contacts the second positioning surface), the limiting boss of the limiting piece rotates downward, and the limiting boss of the limiting piece blocks the front of the button contact boss. The button cannot be closed, and the circuit breaker can be pulled out of the cabinet.

[0041] When the circuit breaker needs to be reinstalled, a tool needs to be inserted between the unlocking buckle and the circuit breaker housing. The unlocking buckle can be pushed outward with the tool to make the unlocking buckle free. The unlocking buckle is horizontally limited by the positioning groove in the circuit breaker housing and cannot move backward.

[0042] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0044] Technical personnel should note: Although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention. Any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A fixing and unlocking mechanism for a circuit breaker, characterized in that: It comprises a circuit breaker housing (1), a button (2) and a limiting member (3); the limiting member (3) is elastically hingedly mounted in the circuit breaker housing (1) and is located above and in front of the button (2); a window (11) is provided on the upper surface of the circuit breaker housing (1); a locking boss (31) is provided on the upper surface of the limiting member (3) and can pass through the window (11); the locking boss (31) has a first state in which it extends out of the window (11) to prevent the circuit breaker from entering the cabinet, and a second state in which it retracts into the window (11) to prevent the button (2) from being closed; The circuit breaker housing (1) is provided with an unlocking buckle (5) at a position behind the limiting member (3); the front end of the unlocking buckle (5) is inserted into the circuit breaker housing (1), and the rear end thereof is exposed outside the circuit breaker housing (1); the unlocking buckle (5) is provided with a resisting portion (51) extending straight forward; the upper surface of the front end of the resisting portion (51) is a sloped surface; the rear end of the limiting member (3) is an arcuate surface; the resisting portion (51) has a first state in which it moves forward to contact the rear end of the limiting member (3) and drives the limiting member (3) to rotate clockwise along the sloped surface; and a second state in which it moves backward to separate from the limiting member (3).

2. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: The limiting member (3) is provided with a rotating shaft (32), the rotating shaft (32) is rotatably mounted in the circuit breaker housing (1), and the locking boss (31) is located at the front side of the rotating shaft (32).

3. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: A limiting boss (33) is provided on the lower surface of the limiting member (3), and a contact boss (21) is provided at the front end of the button (2); when the limiting member (3) is retracted into the window (11), the limiting boss (33) is located directly in front of the contact boss (21).

4. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: An elastic member (4) is provided in the circuit breaker housing (1); one end of the elastic member (4) is fixed to the circuit breaker housing (1), and the other end is fixed to the limiting member (3) and provides a pre-tightening force for the limiting member (3) to extend upward out of the window (11).

5. The fixing and unlocking mechanism of the circuit breaker according to claim 3, characterized in that: The upper surface of the contact boss (21) is provided with an inclined surface (22) for avoiding the limiting member (3).

6. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: The unlocking buckle (5) is provided with an elastic positioning portion (52) located on one side of the abutting portion (51), a plurality of positioning grooves (12) corresponding to the elastic positioning portion (52) are provided in the circuit breaker housing (1), and the end of the elastic positioning portion (52) is an arc surface.

7. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: An operating boss (53) for manual pushing is provided at the rear end of the unlocking buckle (5), and the operating boss (53) is higher than the upper surface of the circuit breaker housing (1).

8. The fixing and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: The unlocking buckle (5) is provided with a first positioning surface (54) facing the circuit breaker housing (1) in the vertical direction, and the circuit breaker housing (1) is provided with a second positioning surface (13) facing the first positioning surface (54), and the first positioning surface (54) and the second positioning surface (13) are both arranged at an inclination.

9. The fixing and unlocking mechanism of the circuit breaker according to claim 6, characterized in that: The elastic positioning portion (52) is symmetrically arranged on both sides of the abutting portion (51).

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