Anti-false-closing mechanism for plug-in circuit breaker

Abstract

The utility model discloses an anti-false-closing mechanism for a plug-in circuit breaker, which comprises a shell, a base and a circuit breaker operating mechanism, the base is also provided with an anti-false-closing mechanism linked with the circuit breaker operating mechanism, and the anti-false-closing mechanism comprises a manual button, a connecting rod, a connecting block, an anti-false-closing piece and a spring piece. The manual button is rotatably connected with one side of the connecting block through the connecting rod, the other side of the connecting block is rotatably connected with the circuit breaker operating mechanism, the false closing prevention piece is installed on the base through a spring piece, the top of the false closing prevention piece extends to the outer side of the shell, and an unlocking mechanism is arranged between the false closing prevention piece and the connecting block. By adopting the false closing prevention mechanism, the circuit breaker is always kept in an opening state before being inserted into a cabinet body, hot-line operation after false closing is avoided, the safety of operators can be effectively guaranteed, and the false closing prevention mechanism is simple and compact in structure, stable and reliable in work, convenient to operate and assemble, high in safety coefficient, high in practicability and wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an anti-misclosing mechanism for a plug-in circuit breaker. Background Art

[0002] Circuit breakers are mechanical switch electrical appliances 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, they are widely used in power distribution systems. The use of circuit breakers can effectively improve the safety of electrical appliances. In order to meet the installation needs of different electrical equipment, with the miniaturization trend of electrical equipment, the overall structure and operation mode of the adapted circuit breakers need to be further upgraded. With the development of society, the demand for miniaturization and convenience of circuit breakers is getting higher and higher, and plug-in circuit breakers came into being.

[0003] The operational safety of circuit breakers has always been a focus of people's attention, especially for plug-in circuit breakers. Since they use a plug-in method to cooperate with the cabinet to quickly connect or disconnect the circuit, the safety and reliability of the operation of the circuit breaker needs to be considered in different situations during use. If the circuit breaker is not inserted into the cabinet, it is necessary to ensure that the circuit breaker cannot be inserted into the cabinet in the closed state, and can only be inserted into the cabinet when it is opened; when the circuit breaker is inside the cabinet, the circuit breaker cannot be pulled out of the cabinet in the closed state. When it is opened, the circuit breaker requires the operator to perform certain operations to pull the circuit breaker out of the cabinet. This not only ensures the safety of the operator, but also prevents the circuit breaker from slipping out of the cabinet due to external vibrations when it is opened.

[0004] After searching, the patent document with the authorization announcement number CN213184157U discloses a locking device for plug-in circuit breakers, the patent document with the authorization announcement number CN211350528U discloses a plug-in circuit breaker, and the patent document with the application publication number CN111863557A discloses a misclosing mechanism for plug-in circuit breakers. From the contents disclosed in the three retrieved patent documents, a plug-in circuit breaker that meets the use requirements is provided from different angles. In order to prevent the circuit breaker from being inserted into the cabinet in the closed state and to ensure the safety of the operator, an anti-misclosing mechanism different from that disclosed in the prior art is provided to meet the use requirements. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an anti-misoperational closing mechanism with a simple structure and convenient operation in view of the problems existing in the background technology. The anti-misoperational closing mechanism is used to avoid inserting a plug-in circuit breaker into a switch cabinet in a closed state. The circuit breaker can be inserted or pulled out only after the circuit breaker is opened and the unlocking device releases the locked state, thereby avoiding misoperation in a live state and keeping the circuit breaker in an open state when inserting or pulling out of the cabinet, effectively ensuring the safety of the operator. Specifically, the utility model is an anti-misoperational closing mechanism for a plug-in circuit breaker.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-mistaken closing mechanism for a plug-in circuit breaker, comprising a shell, a base and a circuit breaker operating mechanism, the base and the circuit breaker operating mechanism are both installed in the shell, and an anti-mistaken closing mechanism linked with the circuit breaker operating mechanism is also provided on the base, the anti-mistaken closing mechanism comprises a manual button, a connecting rod, a connecting block, an anti-mistaken closing member and a spring member, the manual button is rotatably connected to one side of the connecting block through the connecting rod, and the other side of the connecting block is rotatably connected to the circuit breaker operating mechanism, the anti-mistaken closing member is installed on the base through the spring member, and its top extends to the outside of the shell, and an unlocking mechanism is provided between the anti-mistaken closing member and the connecting block.

[0007] Furthermore, the utility model describes an anti-misclosing mechanism for a plug-in circuit breaker, wherein the connecting block is installed in a housing by rotation and is located above a base, the connecting block includes a first connecting portion and a second connecting portion, the connecting block forms an inverted V-shaped structure through the first connecting portion and the second connecting portion, one side of the connecting block is rotatably connected to the connecting rod through the first connecting portion, and the other side of the connecting block is rotatably connected to the circuit breaker operating mechanism through the second connecting portion, the unlocking mechanism includes a limiting boss arranged in the connecting block, and the connecting block is in contact with or separated from the anti-misclosing member through the limiting boss.

[0008] Furthermore, the utility model discloses an anti-mistaken closing mechanism for a plug-in circuit breaker, wherein the anti-mistaken closing member comprises a support block and a card block, the support block has a housing cavity communicated with its bottom, the card block is located at the top of the support block, the unlocking mechanism comprises an anti-mistaken removal limit block arranged on the support block, a card hole corresponding to the card block is arranged on the top of the shell, the spring member is arranged in the housing cavity in the support block, the bottom of the spring member is in contact with the base, and the top of the spring member is in contact with the inner top wall of the housing cavity, the spring member drives the anti-mistaken closing member to approach or move away from the side wall of the shell with the card hole through the elastic force when it is deformed, so that the card block in the anti-mistaken closing member extends out of the card hole or retracts into the card hole; the unlocking mechanism realizes locking or unlocking of the unlocking mechanism by the anti-mistaken removal limit block on the anti-mistaken closing member abutting against or separating from the limit boss in the connecting block.

[0009] Furthermore, in the anti-misclosing mechanism for a plug-in circuit breaker described in the utility model, the left portion of the clamping block is arranged as an inclined pressing end, the pressing end includes an arc surface and an inclined surface, and the arc surface and the inclined surface constitute an integrated insertion pressing surface with the left side surface and the top of the clamping block.

[0010] Furthermore, the utility model discloses an anti-mistaken closing mechanism for a plug-in circuit breaker, wherein the anti-mistaken removal limit block comprises a limit connection block and a limit stop block, the limit connection block is connected to the outer side of the support block, the limit stop block is located at the other end of the limit connection block, the anti-mistaken removal limit block forms an integrated L-shaped structure through the limit connection block and the limit stop block, and the anti-mistaken removal limit block forms a rotation limit on the connection block through the limit stop block and the limit boss abutting against each other.

[0011] Furthermore, in the anti-misclosing mechanism for a plug-in circuit breaker described in the utility model, the spring member is a torsion spring or a return spring.

[0012] The utility model adopts an anti-mistaken closing mechanism for a plug-in circuit breaker, which is configured with a connecting block, an anti-mistaken closing member and a spring member, and utilizes an unlocking mechanism between the connecting block and the anti-mistaken closing member, so that the plug-in circuit breaker cannot be inserted into the switch cabinet in the closed state, cannot be pulled out in the unopened state, and cannot be pulled out after the opening. 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 switch cabinet, under the action of the spring member, the card block is driven to extend upward out of the card hole on the top of the shell during the automatic upward reset process, and the anti-mistaken removal limit block and the limit boss in the unlocking mechanism can automatically reset, limit the operation of the manual button, prevent misoperation, and fundamentally prevent the safety hazards caused by the circuit breaker being inserted into the cabinet in the closed state.

[0013] It can be seen that the use of the anti-misclosing mechanism described in the utility model can effectively avoid misoperation, so that the circuit breaker always remains in the open state before being inserted into the cabinet, avoiding live operation after misclosing, and can effectively ensure the safety of operators. It has a simple and compact structure, stable and reliable operation, easy operation and assembly, high safety factor, strong practicality, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of the utility model in the open state. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model in the open state. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the structure of the utility model in the closed state. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the structure of the utility model in the closed state. Figure 2 .

[0019] As shown in the figure: 1-manual button, 2-connecting rod, 3-connecting block, 31-first connecting part, 32-second connecting part, 33-limiting boss, 4-anti-misclosing member, 41-support block, 42-block, 421-arc surface, 422-inclined surface, 43-anti-mispulling limit block, 431-limiting connecting block, 432-limiting block, 44-accommodating cavity, 5-spring member, 6-shell, 7-base. DETAILED DESCRIPTION

[0020] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0021] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. Example 1

[0024] like Figures 1 to 4 As shown, an anti-mistaken closing mechanism for a plug-in circuit breaker described in this embodiment includes a housing 6, a base 7 and a circuit breaker operating mechanism, the base 7 and the circuit breaker operating mechanism are both installed in the housing 6, and an anti-mistaken closing mechanism linked to the circuit breaker operating mechanism is also provided on the base 7, the anti-mistaken closing mechanism includes a manual button 1, a connecting rod 2, a connecting block 3, an anti-mistaken closing member 4 and a spring member 5, the connecting block 3 is installed in the housing 6 in a rotatable manner and is located above the base 7, the manual button 1 is rotatably connected to one side of the connecting block 3 through the connecting rod 2, and the other side of the connecting block 3 is rotatably connected to the circuit breaker operating mechanism, the anti-mistaken closing member 4 is installed on the base 7 through the spring member 5, and its top extends to the outside of the housing 6, and an unlocking mechanism is provided between the anti-mistaken closing member 4 and the connecting block 3.

[0025] Among them, the connecting block 3 includes a first connecting part 31 and a second connecting part 32, and the connecting block 3 forms an inverted V-shaped structure through the first connecting part 31 and the second connecting part 32. One side of the connecting block 3 is rotatably connected to the connecting rod 2 through the first connecting part 31, and the other side of the connecting block 3 is rotatably connected to the circuit breaker operating mechanism through the second connecting part 32. The unlocking mechanism includes a limiting boss 33 arranged in the connecting block 3, and the connecting block 3 is in contact with or separated from the anti-misclosing member 4 through the limiting boss 33; and the anti-misclosing member 4 includes a supporting block 41 and a clamping block 42, and the supporting block 41 has a accommodating cavity 44 communicated with its bottom, and the clamping block 42 is located at the top of the supporting block 41. The unlocking mechanism includes an anti-mistaken removal limit block 43 arranged on the support block 41, and a card hole corresponding to the card block 42 is arranged on the top of the shell 6. The spring member 5 is arranged in the accommodating cavity 44 in the support block 41, and its bottom is in contact with the base 7, and its top is in contact with the inner top wall surface of the accommodating cavity 44. The spring member 5 drives the anti-mistaken closing member 4 to approach or move away from the side wall of the shell 6 with the card hole through its elastic force when it is deformed, so that the card block 42 in the anti-mistaken closing member 4 extends out of the card hole or retracts into the card hole; the unlocking mechanism realizes locking or unlocking of the unlocking mechanism by the anti-mistaken removal limit block 43 on the anti-mistaken closing member 4 abutting against or separating from the limit boss 33 in the connecting block 3.

[0026] Furthermore, the anti-mistaken closing mechanism described in this embodiment is adopted, and the anti-mistaken removal limit block 43 includes a limit connection block 431 and a limit stop block 432, the limit connection block 431 is connected to the outer side surface of the support block 41, and the limit stop block 432 is located at the other end of the limit connection block 431, and the anti-mistaken removal limit block 43 forms an integrated L-shaped structure through the limit connection block 431 and the limit stop block 432, and the anti-mistaken removal limit block 43 is in contact with the limit boss 33 through the limit stop block 432 to form a rotation limit for the connection block 3.

[0027] Furthermore, in the anti-misclosing mechanism of this embodiment, the spring member 5 is a torsion spring or a return spring. When the spring member 5 is a torsion spring, the two legs of the torsion spring are in contact and connection with the base 7 and the inner top wall of the accommodating cavity 44 respectively; and when the spring member 5 is a return spring, the lower end of the return spring is arranged on the base 7, and the upper end thereof is in contact and connection with the inner top wall of the accommodating cavity 44. Example 2

[0028] This embodiment is based on the first embodiment. In order to facilitate operation and enable the plug-in circuit breaker to be smoothly inserted into or removed from the switch cabinet, the left portion of the clamping block 42 is configured as an inclined pressing end. The pressing end includes an arc surface 421 and an inclined surface 422. The arc surface 421 and the inclined surface 422 form an integrated insertion pressing surface with the left side surface and the top of the clamping block 42.

[0029] The working principle of the anti-mistaken closing mechanism of the utility model is as follows: when the plug-in circuit breaker is not inserted into the switch cabinet or is inserted into the switch cabinet but not in place, the card block 42 extends upward out of the card hole on the top of the shell 6 under the action of the spring member 5, and the anti-mistaken removal limit block 43 in the anti-mistaken closing member 4 is in abutment contact with the limit boss 33 in the connecting block 3, that is, in a locked state, and the circuit breaker operating mechanism connected to the connecting block 3 is in a locked state, limiting the rotation of the circuit breaker operating mechanism connected to the connecting block 3, and the hand The push button 1 cannot be pushed forward, so that the plug-in circuit breaker cannot be closed, thereby preventing the circuit breaker from being operated in the closed state; and when the plug-in circuit breaker is installed in place, the clamping block 42 is retracted into the clamping hole on the top of the shell 6 under the action of the switch cabinet, driving the support block 41 to compress the spring member 5 and move toward the base 7, and simultaneously driving the anti-mistaken removal limit block 43 and the limit boss 33 in the connecting block 3 to separate from the abutting contact state, so that the circuit breaker operating mechanism connected to the connecting block 3 is in an unlocked state, thereby enabling the circuit breaker to be opened and closed.

[0030] It can be seen that, by adopting the anti-misclosing mechanism described in the utility model, through the configured connecting block 3, anti-misclosing member 4 and spring member 5, and utilizing the unlocking mechanism between the connecting block 3 and the anti-misclosing member 4, the plug-in circuit breaker cannot be inserted into the switch cabinet in the closed state, cannot be pulled out in the unopened state, and cannot be pulled out after the opening. 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 switch cabinet, under the action of the spring member 5, during the automatic upward reset process, the card block 42 is driven to extend upward out of the card hole at the top of the shell 6, so that the anti-misapplied limit block 43 and the limit boss 33 in the unlocking mechanism can automatically reset again, limit the operation of the manual button 1, prevent misoperation, and fundamentally prevent the safety hazards caused by the circuit breaker being inserted into the cabinet in the closed state.

[0031] In summary, the anti-misclosing mechanism described in the utility model can effectively avoid misoperation, so that the circuit breaker always remains in the open state before being inserted into the cabinet, and live operation after misclosing is avoided, which can effectively ensure the safety of operators. It has a simple and compact structure, stable and reliable operation, convenient operation and assembly, high safety factor, strong practicality, and has a wide range of applications.

[0032] Other details of the present invention are all conventional techniques known to those skilled in the art.

[0033] The protection scope of the utility model is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the utility model and does not limit the utility model. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of the utility model should be included in the protection scope of the technical solutions of the utility model.

Claims

1. An anti-mis-closing mechanism for a plug-in circuit breaker, comprising a housing (6), a base (7) and a circuit breaker operating mechanism, wherein the base (7) and the circuit breaker operating mechanism are both installed in the housing (6), and an anti-mis-closing mechanism linked to the circuit breaker operating mechanism is also provided on the base (7), characterized in that: The anti-mistaken closing mechanism comprises a manual button (1), a connecting rod (2), a connecting block (3), an anti-mistaken closing member (4) and a spring member (5); the manual button (1) is rotatably connected to one side of the connecting block (3) via the connecting rod (2); the other side of the connecting block (3) is rotatably connected to a circuit breaker operating mechanism; the anti-mistaken closing member (4) is mounted on a base (7) via the spring member (5); the top of the anti-mistaken closing member (4) extends to the outside of a housing (6); and an unlocking mechanism is provided between the anti-mistaken closing member (4) and the connecting block (3).

2. The anti-misclosing mechanism for a plug-in circuit breaker according to claim 1, characterized in that: The connecting block (3) is installed in the housing (6) in a rotatable manner and is located above the base (7). The connecting block (3) includes a first connecting portion (31) and a second connecting portion (32). The connecting block (3) forms an inverted V-shaped structure through the first connecting portion (31) and the second connecting portion (32). One side of the connecting block (3) is rotatably connected to the connecting rod (2) through the first connecting portion (31), and the other side of the connecting block (3) is rotatably connected to the circuit breaker operating mechanism through the second connecting portion (32). The unlocking mechanism includes a limiting boss (33) arranged in the connecting block (3). The connecting block (3) is in contact with or separated from the anti-misclosing component (4) through the limiting boss (33).

3. The anti-misclosing mechanism for a plug-in circuit breaker according to claim 2, characterized in that: The anti-mistaken closing member (4) comprises a support block (41) and a clamping block (42); the support block (41) has a receiving cavity (44) communicating with the bottom thereof; the clamping block (42) is located at the top of the support block (41); the unlocking mechanism comprises an anti-mistaken removal limit block (43) arranged on the support block (41); a clamping hole corresponding to the clamping block (42) is arranged at the top of the shell (6); the spring member (5) is arranged in the receiving cavity (44) in the support block (41); and the bottom of the spring member (5) is connected to the base (7). The spring member (5) is connected with the inner top wall of the accommodating cavity (44) by contact, and its top is connected with the inner top wall of the accommodating cavity (44); the spring member (5) drives the anti-mistaken closing member (4) to approach or move away from the side wall of the shell (6) provided with a clamping hole by its elastic force when it is deformed, so that the clamping block (42) in the anti-mistaken closing member (4) extends out of the clamping hole or retracts into the clamping hole; the unlocking mechanism realizes the locking or unlocking of the unlocking mechanism by the anti-mistaken removal limit block (43) on the anti-mistaken closing member (4) and the limit boss (33) in the connecting block (3) abutting against or separating.

4. The anti-misclosing mechanism for a plug-in circuit breaker according to claim 3, characterized in that: The left portion of the clamping block (42) is arranged as an inclined pressing end, and the pressing end comprises an arc surface (421) and an inclined surface (422), and the arc surface (421) and the inclined surface (422) form an integral insertion pressing surface with the left side surface and the top of the clamping block (42).

5. The anti-misclosing mechanism for plug-in circuit breaker according to claim 3, characterized in that: The anti-mistaken removal limit block (43) comprises a limit connection block (431) and a limit stop block (432); the limit connection block (431) is connected to the outer side surface of the support block (41); the limit stop block (432) is located at the other end of the limit connection block (431); the anti-mistaken removal limit block (43) forms an integrated L-shaped structure through the limit connection block (431) and the limit stop block (432); the anti-mistaken removal limit block (43) is in contact with the limit boss (33) through the limit stop block (432) to form a rotation limit for the connection block (3).

6. The anti-misclosing mechanism for plug-in circuit breaker according to claim 3, characterized in that: The spring element (5) is a torsion spring or a return spring.

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