A fixing and unlocking device for a circuit breaker

Abstract

The present invention discloses a fixing and unlocking device for a circuit breaker, which relates to the field of low-voltage electrical appliances, and comprises a housing, an operating button, a limiting member and a handle, wherein the operating button can be installed in the housing in a linearly sliding manner, the handle can be rotatably installed in the housing and is located directly in front of the operating button, the operating button is linked to the handle and drives it to rotate forward and reversely, the limiting member is installed in the housing and is located above the operating button, the limiting member is provided with a compressed boss that can be exposed or retracted into the housing, the limiting member has a first position in which the limiting member contacts and cooperates with the handle when the circuit breaker is in a closed state and the compressed boss is exposed outside the housing, and has a second position in which the limiting member contacts and cooperates with the handle to prevent the circuit breaker from closing and the compressed boss is retracted into the housing. The present invention has the advantages of good safety, stability and reliability.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a fixing and unlocking device for a circuit breaker. Background Art

[0002] As a switch that can provide various protection functions, circuit breakers can effectively improve the safety and reliability of low-voltage electrical appliances and power lines. In order to meet the increasingly diverse needs of users, the diversification and miniaturization of circuit breakers is a trend.

[0003] The existing circuit breaker can be directly wired when it is in the closed state but not installed in place, which is not conducive to the reliable and stable operation of the circuit breaker and also poses a safety hazard.

[0004] After the existing circuit breaker is installed in place and powered on, there is a risk of being accidentally pulled out, which is not conducive to the reliable operation of the circuit breaker and electrical equipment, and also poses a safety hazard. Summary of the invention

[0005] In order to overcome the shortcomings of the background technology, the present invention provides a fixing and unlocking device for a circuit breaker with good safety, stability and reliability.

[0006] The technical solution adopted by the present invention is as follows: a fixing and unlocking device for a circuit breaker, which comprises a shell, an operating button, a limiting member and a handle, wherein the operating button can be installed in the shell so as to slide linearly, the handle can be rotatably installed in the shell and is located directly in front of the operating button, the operating button is linked to the handle and drives it to rotate forward and reversely, the limiting member is installed in the shell and is located above the operating button, the limiting member is provided with a pressure boss which can be exposed or retracted into the shell, the limiting member has a first position in which the limiting member contacts and cooperates with the handle when the circuit breaker is in a closed state and the pressure boss is exposed outside the shell, and has a second position in which the limiting member contacts and cooperates with the handle to prevent the circuit breaker from closing and the pressure boss is retracted into the shell.

[0007] The rear end of the limiting member is hingedly installed in the shell, and the front end of the limiting member is provided with a limiting boss 1 that cooperates with the handle, and the handle is provided with a limiting boss 2 that extends along the radial direction and corresponds to the limiting boss 1. When the limiting member is in the second position, the front end surface of the limiting boss 1 and the side wall surface of the limiting boss 2 form an interference fit.

[0008] A side of the limiting boss 1 facing the limiting boss 2 is provided with an avoidance concave surface, and when the limiting member is in the first position, the avoidance concave surface and the outer circumferential surface of the limiting boss 2 form a contact fit.

[0009] The circumferential surface of the handle also extends out a positioning step surface, and a positioning boss is provided in the shell. The avoidance concave surface forms a contact fit with the outer circumferential surface of the second limiting boss, and the positioning step surface also forms a contact fit with the positioning boss.

[0010] The rear end of the limiting member is also provided with a swinging boss 1 extending downward, and the upper surface of the operating button is provided with a swinging boss 2 located directly in front of the swinging boss 1. When the operating button is pulled back, the swinging boss 2 contacts the swinging boss 2 and drives the pressure boss of the limiting member to retract into the shell.

[0011] The lower surface of the limiting member is provided with an avoidance groove corresponding to the second swing boss, and the length of the avoidance groove is greater than the movement stroke of the second swing boss.

[0012] It also includes an elastic member, and the limiting member is also provided with a mounting shaft for the elastic member to be mounted on. One end of the elastic member is fixedly arranged, and the other end is installed in abutment on the limiting member. The side of the limiting member is provided with a shifting boss for limiting the movement of the elastic member.

[0013] A first mounting hole is provided at the front end of the operation button, a second mounting hole is provided in the circumference of the handle, and a connecting rod is provided between the first mounting hole and the second mounting hole to hinge the two.

[0014] The beneficial effects of the present invention are as follows: the technical solution ensures reliable assembly and stable operation of the small circuit breaker through the cooperation of the fixing and unlocking device with the housing limit of the circuit breaker, and prevents the circuit breaker from being pulled out after being assembled in place; the fixing and unlocking device cooperates with the button to prevent the circuit breaker from being installed in place when the circuit breaker is in the closed state; when the circuit breaker is pushed into the cabinet, the limiting boss of the limiting member can support the handle when the locking boss is pressed into the housing by the cabinet, so as to prevent the circuit breaker from being closed; it is beneficial to further improve the reliable assembly and stable operation of the small circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the operation button.

[0016] Figure 2 This is a structural diagram of the operation button from another angle.

[0017] Figure 3 A schematic diagram of the structure of the handle.

[0018] Figure 4 It is a schematic diagram of the structure of the limiting part.

[0019] Figure 5 It is a structural schematic diagram when the limiting member is in the first position.

[0020] Figure 6It is a schematic structural diagram of a fixing and unlocking device for a circuit breaker according to an embodiment of the present invention.

[0021] Figure 7 It is a structural schematic diagram when the limiting member is in the second position.

[0022] Figure 8 It is a schematic diagram of the structure when the operating button is pulled back and the limiting member is retracted into the housing.

[0023] Fig. 9 for Figure 5 A partial enlarged view of point A in the middle.

[0024] Fig.10 for Figure 7 A partial enlarged view of point B in the middle.

[0025] Fig.11 for Figure 8 A partial enlarged view of point C in the middle. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0027] As shown in the figure, a fixing and unlocking device for a circuit breaker includes a housing 1, an operating button 2, a limiting member 3 and a handle 4. The operating button 2 can be installed in the housing 1 in a linear sliding manner, and the handle 4 can be rotatably installed in the housing 1 and is located directly in front of the operating button 2. The operating button 2 is linked to the handle 4 and drives it to rotate forward and reversely. The limiting member 3 is installed in the housing 1 and is located above the operating button 2. The limiting member 3 is provided with a pressure-bearing boss 31 that can be exposed or retracted into the housing 1. The limiting member 3 has a contact and cooperation with the handle 4 when the circuit breaker is in a closed state, and the pressure-bearing boss 31 is exposed in the housing 1. The first position outside the housing 1 and the second position where the pressed boss 31 is retracted into the housing 1 and forms a top contact with the handle 4 to prevent the circuit breaker from closing; the technical solution ensures the reliable assembly and stable operation of the miniature circuit breaker through the limiting cooperation of the fixing and unlocking device with the housing of the circuit breaker, and prevents the circuit breaker from being pulled out after being assembled in place; the fixing and unlocking device cooperates with the button to prevent the circuit breaker from being installed in place when the circuit breaker is closed; when the circuit breaker is pushed into the cabinet, the limiting boss of the limiting member can support the handle when the locking boss is pressed into the housing by the cabinet to prevent the circuit breaker from closing; it is conducive to further improving the reliable assembly and stable operation of the miniature circuit breaker.

[0028] The rear end of the limiting member 3 is hingedly installed in the housing 1, and the front end of the limiting member 3 is provided with a limiting boss 1 32 that cooperates with the handle 4, and the handle 4 is provided with a limiting boss 2 41 extending in the radial direction and corresponding to the limiting boss 1 32. When the limiting member 3 is in the second position, the front end face of the limiting boss 1 32 and the side wall surface of the limiting boss 2 41 form a conflicting match. At this time, the operating button cannot push the switch to close, because the front end face of the limiting boss 1 32 and the side wall surface of the limiting boss 2 41 form a conflicting match. Figure 7 and Fig.10 As shown, the handle cannot continue to rotate counterclockwise, and the operating button cannot move forward.

[0029] The side of the limiting boss 1 32 facing the limiting boss 2 41 is provided with an avoidance concave surface 33. When the limiting member 3 is in the first position, the avoidance concave surface 33 and the outer circumferential surface of the limiting boss 2 41 form a contact fit. Figure 5 and Fig. 9 As shown, the outer circumferential surface of the limiting boss 2 presses against the upper avoidance concave surface, so that the limiting member cannot rotate, and at the same time, the cabinet cannot be inserted into or pulled out of the cabinet when the circuit breaker is in the closed state.

[0030] The circumferential surface of the handle 4 also extends a positioning step surface 42, and the housing 1 is provided with a positioning boss 11. The avoidance concave surface 33 and the outer circumferential surface of the limiting boss 41 form a contact fit, and the positioning step surface 42 and the positioning boss 11 also form a contact fit. Fig. 9 As shown, when the positioning step surface contacts the positioning boss, it means that the circuit breaker has been closed in place, and the corresponding limiting boss 2 is just located below the avoidance concave surface, and the two are in contact with each other.

[0031] The rear end of the limiting member 3 is also provided with a swinging boss 34 extending downward, and the upper surface of the operating button 2 is provided with a swinging boss 21 located directly in front of the swinging boss 34. When the operating button 2 is pulled back, the swinging boss 21 abuts against the swinging boss 21 and drives the pressure boss 31 of the limiting member 3 to retract into the shell 1; when the circuit breaker is disassembled, the operating button needs to be pulled out, and at this time, the swinging boss 2 of the limiting member rotates under the push of the swinging boss 1 of the operating button boss, and the pressure boss of the limiting member retracts into the shell, and the circuit breaker can be pulled out of the cabinet.

[0032] The lower surface of the limiting member 3 is provided with an avoidance groove 35 corresponding to the second swing boss 21 . The length of the avoidance groove 35 is greater than the movement stroke of the second swing boss 21 , thereby preventing interference.

[0033] The limiting member 3 further comprises an elastic member 5, and a mounting shaft 36 for the elastic member 5 is provided on the limiting member 3. One end of the elastic member 5 is fixedly arranged, and the other end thereof is mounted on the limiting member 3 in abutting manner. A shifting boss 37 for limiting the movement of the elastic member 5 is provided on the side of the limiting member 3. The phrase "one end of the elastic member is fixedly arranged" is relative, because if Figure 5 As shown, one end of the elastic member is in contact with the lock buckle 8, and the lock buckle 8 is fixed relative to the limiting member. The lock buckle is not described in detail in this embodiment.

[0034] The front end of the operation button 2 is provided with a mounting hole 1 22, and the circumference of the handle 4 is provided with a mounting hole 2 43. A connecting rod 6 is provided between the mounting hole 1 22 and the mounting hole 2 43 to hinge the two. The operation button can move forward and backward and drive the handle to rotate forward and reverse through the connecting rod.

[0035] The specific states of the fixing and unlocking device of this embodiment are as follows:

[0036] When the circuit breaker is in the open state, the limiting member is pressed against the housing under the action of the elastic member, and the pressure-bearing boss of the limiting member is exposed outside the housing;

[0037] Push the circuit breaker into the cabinet, the pressure boss of the limiting 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 pressure boss of the limiting member is stuck in the installation groove of the cabinet under the action of the elastic member;

[0038] When the circuit breaker is installed in place, push the operation button to close the circuit breaker.

[0039] If the circuit breaker is not installed in place, the pressure boss of the limiting part is pressed down by the inner wall of the cabinet, and the limit boss of the limiting part presses against the handle boss, and the operating button cannot close the circuit breaker;

[0040] When the circuit breaker is in the closed state, the avoidance concave surface 33 of the limiting boss 1 is in contact with the outer circumferential surface of the limiting boss 2 41, forming a state in which the limiting boss 2 presses against the limiting boss 1, preventing the pressure boss of the limiting member from retracting into the housing. When the circuit breaker is pushed into the cabinet, the cabinet will jam the pressure boss, so that the circuit breaker cannot be pushed into the cabinet.

[0041] When disassembling the circuit breaker, the operating button needs to be pulled outward. At this time, the swing boss 2 of the limiting member rotates under the push of the swing boss 1 of the operating button boss, and the pressure boss of the limiting member retracts into the shell. At this time, the circuit breaker can be pulled out of the cabinet.

[0042] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0044] Technical personnel should note that 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, and any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A fixing and unlocking device for a circuit breaker, characterized in that: The invention comprises a housing (1), an operating button (2), a limiting member (3) and a handle (4); the operating button (2) is linearly slidably mounted in the housing (1); the handle (4) is rotatably mounted in the housing (1) and is located directly in front of the operating button (2); the operating button (2) is linked to the handle (4) and drives it to rotate forward and reversely; the limiting member (3) is mounted in the housing (1) and is located above the operating button (2); the limiting member (3) is provided with a pressure-bearing boss (31) that can be exposed or retracted into the housing (1); the limiting member (3) has a first position in which the limiting member is in contact with the handle (4) when the circuit breaker is in a closed state and the pressure-bearing boss (31) is exposed outside the housing (1); and has a second position in which the limiting member is in contact with the handle (4) to prevent the circuit breaker from being closed and the pressure-bearing boss (31) is retracted into the housing (1); The limiting member (3) is hingedly mounted at a rear end in the housing (1); a limiting boss 1 (32) cooperating with the handle (4) is provided at a front end of the limiting member (3); and a limiting boss 2 (41) extending in a radial direction and corresponding to the limiting boss 1 (32) is provided at the handle (4); when the limiting member (3) is in the second position, a front end surface of the limiting boss 1 (32) and a side wall surface of the limiting boss 2 (41) form a contact fit.

2. The fixing and unlocking device for a circuit breaker according to claim 1, characterized in that: A side of the limiting boss 1 (32) facing the limiting boss 2 (41) is provided with an avoidance concave surface (33), and when the limiting member (3) is in the first position, the avoidance concave surface (33) forms a contact fit with the outer circumferential surface of the limiting boss 2 (41).

3. The fixing and unlocking device of a circuit breaker according to claim 2, characterized in that: The circumferential surface of the handle (4) further extends a positioning step surface (42), a positioning boss (11) is provided in the housing (1), the avoidance concave surface (33) forms a contact fit with the outer circumferential surface of the second limiting boss (41), and the positioning step surface (42) also forms a contact fit with the positioning boss (11).

4. The fixing and unlocking device for a circuit breaker according to claim 1, characterized in that: The rear end of the limiting member (3) is also provided with a swing boss 1 (34) extending downward, and the upper surface of the operating button (2) is provided with a swing boss 2 (21) located directly in front of the swing boss 1 (34). When the operating button (2) is pulled back, the swing boss 2 (21) abuts against the swing boss 2 (21) and drives the pressure boss (31) of the limiting member (3) to retract into the housing (1).

5. The fixing and unlocking device for a circuit breaker according to claim 4, characterized in that: The lower surface of the limiting member (3) is provided with an avoidance groove (35) corresponding to the second swing boss (21), and the length of the avoidance groove (35) is greater than the movement stroke of the second swing boss (21).

6. The fixing and unlocking device for a circuit breaker according to claim 1, characterized in that: The limiting member (3) further comprises an elastic member (5), the limiting member (3) being provided with a mounting shaft (36) for the elastic member (5) to be mounted thereon, one end of the elastic member (5) being fixedly arranged, and the other end of the elastic member (5) being mounted thereon in abutment with the limiting member (3), and a shifting boss (37) for limiting the movement of the elastic member (5) being provided on a side surface of the limiting member (3).

7. The fixing and unlocking device for a circuit breaker according to claim 1, characterized in that: The front end of the operating button (2) is provided with a first mounting hole (22), the circumference of the handle (4) is provided with a second mounting hole (43), and a connecting rod (6) is provided between the first mounting hole (22) and the second mounting hole (43) to hingedly connect the two.

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