A small circuit breaker with lockable handle

Abstract

The present invention discloses a small circuit breaker with a lockable handle, comprising a first housing and a second housing, a handle being rotatably mounted between the first housing and the second housing, the handle being provided with a through jack, a locking plate being movably provided in the jack, a first baffle plate and a second baffle plate being respectively provided on both sides of the locking plate, the first baffle plate being located at the outer side of the first housing, the second baffle plate being located at the outer side of the second housing, a locking block being further provided on the first housing, after the locking plate drives the first baffle plate to move toward the first housing, the first baffle plate is engaged with one side of the locking block, so that the handle is locked and cannot be rotated, after the locking plate drives the second baffle plate to move toward the second housing, the first baffle plate is no longer engaged with the locking block, so that the handle is unlocked and can be rotated. The present invention has the beneficial effect that the handle can be locked to prevent the small circuit breaker from switching the opening and closing states, so as to facilitate maintenance and inspection thereof.

Description

Technical Field

[0001] The invention belongs to the technical field of miniature circuit breakers, and in particular relates to a miniature circuit breaker with a lockable handle. Background Art

[0002] Small circuit breakers, also known as miniature circuit breakers, are mainly used for overload and short-circuit protection of lines. They can also be used for infrequent operation conversion of lines under normal circumstances. Currently, small circuit breakers are used in various places such as industry, commerce, high-rise buildings and residential buildings.

[0003] The small circuit breaker includes a shell and a handle. The handle is installed on the top of the shell. The circuit breaker can be closed or opened by turning the handle, which is relatively convenient. In actual use, when maintenance personnel perform maintenance and inspection on the line connected to the circuit breaker, it is sometimes necessary to lock the circuit breaker handle and maintain it in the closed or opened state, so that the line is always in the on or off state, and to prevent the subsequent circuit breaker handle from being rotated due to external force.

[0004] In the existing small circuit breakers, the method for locking the handle is: most of them are to provide a lock hole on the housing, and insert a locking rod into the lock hole to limit the handle from rotating to one side. This method is relatively simple, but on the one hand, it is time-consuming and laborious to insert the locking rod into the lock hole, and the efficiency is low; on the other hand, the locking rod is easy to loosen and disengage from the lock hole, affecting the locking of the handle. Summary of the invention

[0005] The existing small circuit breaker uses a locking rod to lock the upper handle, which has many disadvantages. To solve this problem, the following invention is proposed:

[0006] A small circuit breaker with a lockable handle comprises a first shell and a second shell, a handle is rotatably mounted between the first shell and the second shell, the handle is provided with a through socket, a locking plate is movably provided in the socket, a first baffle plate and a second baffle plate are respectively provided on both sides of the locking plate, the first baffle plate is located at the outer side of the first shell, and the second baffle plate is located at the outer side of the second shell, and a locking block is also provided on the first shell, after the locking plate drives the first baffle plate to move toward the first shell, the first baffle plate is engaged with one side of the locking block, so that the handle is locked and cannot be rotated, and after the locking plate drives the second baffle plate to move toward the second shell, the first baffle plate no longer engages with the locking block, so that the handle is unlocked and can be rotated.

[0007] Furthermore, the locking plate includes a first plug plate and a second plug plate, one end of the first plug plate is provided with a slot located in the socket, and the other end is connected to the first baffle, one end of the second plug plate is provided with a plug located in the socket, and the other end is connected to the second baffle, the plug is inserted into the slot to fix the first plug plate and the second plug plate.

[0008] Furthermore, a limiting groove is provided between the first baffle plate and the second baffle plate and the handle, and a limiting block is movably provided on the first plug plate and the second plug plate, and the limiting block is provided with a limiting portion which enters the limiting groove after rotation to prevent the first plug plate and the second plug plate from moving horizontally in the plug hole, thereby avoiding the first baffle plate from moving, thereby further locking the handle.

[0009] Furthermore, the first baffle plate and the second baffle plate are provided with mounting grooves, a mounting shaft is provided in the mounting groove, an opening communicating with the limiting groove is provided above the mounting shaft, and after the limiting block is rotated, the limiting portion is transferred into the limiting groove.

[0010] Furthermore, a positioning block is provided on one side of the limit block, and the positioning block is against the upper side of the opening; a strip-shaped rotation groove is provided on the outer side of the limit block, and the limit block can be quickly rotated by inserting a specific tool into the rotation groove.

[0011] Furthermore, a guide groove is provided on the second shell, and a guide column is provided on the second baffle plate to be inserted into the guide groove. When the handle is rotated, the guide column is driven to move along the guide groove to improve the stability of the handle during movement.

[0012] Furthermore, there are a plurality of locking blocks arranged in an arc shape, and locking grooves for the first baffle to be inserted into are provided between adjacent locking blocks. After the first baffle is inserted into the locking groove, the handle is immediately locked.

[0013] The present invention proposes a small circuit breaker, which has the beneficial effect that a first baffle and a second baffle are respectively provided on both sides of a handle, and the handle can be locked by moving the first baffle and engaging with the baffle so that it will not rotate due to external force, thereby maintaining the circuit breaker in a closed or open state, making it convenient for operators to perform maintenance and inspection on it. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0015] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a schematic diagram of the split structure of the locking plate in the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the handle when it is unlocked in the present invention;

[0018] Figure 5It is a schematic diagram of the three-dimensional structure when the handle of the present invention is locked;

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the first baffle and the limiting block in the present invention.

[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0021] 1. First shell; 2. Second shell; 3. Handle; 4. Locking plate; 5. Mounting slot; 6. Limit block; 11. Lock block; 12. Locking slot; 21. Guide slot; 31. Plug hole; 41. First baffle plate; 42. Second baffle plate; 43. First plug plate; 44. Second plug plate; 45. Slot; 46. Plug; 47. Guide column; 51. Mounting shaft; 52. Opening; 53. Limit slot; 61. Limiting part; 62. Positioning block; 63. Rotation slot. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0023] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0025] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0026] like Figure 1-Figure 3 As shown, it is a preferred embodiment of the present invention, a small circuit breaker with a lockable handle, comprising a first shell 1 and a second shell 2 installed horizontally, a handle 3 is rotatably installed at the top between the first shell 1 and the second shell 2, a socket 31 is horizontally passed through the handle 3, a locking plate 4 is movably arranged in the socket 31, and a first baffle 41 and a second baffle 42 are respectively arranged on both sides of the locking plate 4, wherein the first baffle 41 is located at the outer side of the first shell 1, and the second baffle 42 is located at the additional side of the second shell 2, and a locking block 11 is also arranged on the first shell 1.

[0027] After pushing the first baffle plate 41 to move toward the first shell 1, the locking plate 4 drives the second baffle plate 42 to move away from the second shell 2, and the first baffle plate 41 is engaged with one side of the locking block 11. The handle 3 cannot rotate because the first baffle plate 41 is engaged with one side of the locking block 11, thereby entering a locked state. According to the state of the handle 3 before being locked, the handle 3 can be locked in a closed or open state; after pushing the second baffle plate 42 to move toward the second shell 2, the locking plate 4 drives the first baffle plate 41 to move away from the first shell 1. After the first baffle plate 41 moves to the outside of the locking block 11, it is no longer engaged with it, so that the handle 3 is unlocked, the handle 3 can be rotated normally, and the handle 3 can change its state.

[0028] Specifically, in this embodiment, Figure 3 As shown, the locking plate 4 includes a first plug plate 43 and a second plug plate 44, and a slot 45 and a first baffle 41 are respectively provided at both ends of the first plug plate 43. After the first plug plate 43 is partially inserted into the socket 31, the slot 45 is located in the socket 31, and a plug 46 and a second baffle 42 are respectively provided at both ends of the second plug plate 44. Similarly, after the second plug plate 44 is partially inserted into the socket 31, the plug 46 is also located in the socket 31, and the plug 46 is also inserted into the slot 45 to fix the first plug plate 43 and the second plug plate 44. During the movement of the first plug plate 43 and the second plug plate 44, the first baffle 41 or the second baffle 42 will first contact with the first shell 1 or the second shell 2.

[0029] On the basis of the above, a limiting groove 53 is provided between the first baffle plate 41, the second baffle plate 42 and the handle 3. After the two plug plates are pushed, the width of the limiting groove 53 will change, and since the baffle plate will first contact the shell during the pushing process, the width of the limiting groove 53 is always not zero. The operator can use a specific tool to insert the limiting groove 53, and then pull the baffle plate outward to separate the first plug plate 43 and the second plug plate 44. The first baffle plate 41 and the second baffle plate 42 are both provided with a mounting groove 5 that penetrates into the first plug plate 43 and the second plug plate 44. A mounting shaft 51 is provided in the mounting groove 5. An opening 52 that is connected to the limiting groove 53 is provided above the mounting shaft 51. A limiting block 6 is movably installed on the mounting shaft 51. The limiting block 6 is provided with a limiting portion 61 that matches the bottom of the mounting groove 5. In order to improve the stability of the installation of the limiting block 6, a threaded fastener that is threadedly connected to the end of the mounting shaft 51 can also be provided on the outside of the limiting block 6, or the limiting block 6 can be directly threadedly connected to the mounting shaft 51.

[0030] After one of the baffles moves to contact the shell, the width of the limit slot 53 between the other baffle and the handle 3 reaches the maximum. At this time, the limit block 6 is rotated around the mounting shaft 51. Figure 5 As shown, the limiting portion 61 rotates accordingly and finally enters the limiting groove 53. The limiting portion 61 located in the limiting groove 53 is engaged between the baffle and the handle 3 to prevent the baffle from moving toward the handle 3. Due to the restriction of another baffle, the baffle cannot move away from the handle 3, and finally the purpose of preventing the first plug plate 43 and the second plug plate 44 from moving horizontally in the insertion hole 31 is achieved, so that the handle 3 can always be fixed in the locked state and the unlocked state, and the stability and reliability of the handle 3 when subjected to external force are improved; accordingly, as shown in FIG. Figure 4 As shown, after the limiting portion 61 is rotated into the mounting groove 5, the restriction on the movement of the first plug plate 43 and the second plug plate 44 can be released.

[0031] In this embodiment, if Figure 6 As shown, a positioning block 62 extending horizontally outward is further provided on one side of the limit block 6. When the limit portion 51 does not enter the limit groove 53, the positioning block 62 is blocked at the upper left side of the opening 52. A strip-shaped rotation groove 63 is also provided on the outer side of the limit block 6. After a specific tool is inserted into the rotation groove 63, the limit block 6 can be rotated. During the rotation of the limit block 6, the positioning block 62 rotates therewith. When the positioning block 62 is blocked at the upper right side of the opening 52, the positioning block 62 stops rotating. At this time, the limit portion 51 completely enters the limit groove 53 to prevent the locking plate 4 from moving relative to the handle 3.

[0032] In this embodiment, an arc-shaped guide groove 21 is provided on the second shell 2, and a guide column 47 is provided on the second baffle plate 42 to be inserted into the guide groove 21. After the handle 3 is rotated, the guide column 47 is driven to move along the guide groove 21. The guide groove 21 ensures that the guide column 47 remains stable during the movement. The movement of the second baffle plate 42 caused by the first baffle plate 41 being pushed will not allow the guide column 47 to escape from the guide groove 21. Furthermore, a plurality of locking blocks 11 are provided, and are arranged in an arc shape. Locking grooves 12 for the first baffle plate 41 to be inserted into are provided between adjacent locking blocks 11, so as to further improve the stability of locking the handle 3.

[0033] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A small circuit breaker with a lockable handle, comprising a first housing (1) and a second housing (2), wherein a handle (3) is rotatably mounted between the first housing (1) and the second housing (2), characterized in that: The handle (3) is provided with a through insertion hole (31), a locking plate (4) is movably provided in the insertion hole (31), a first baffle (41) and a second baffle (42) are respectively provided on both sides of the locking plate (4), the first baffle (41) is located at the outer side of the first shell (1), and the second baffle (42) is located at the outer side of the second shell (2), and a locking block (11) is also provided on the first shell (1), after the locking plate (4) drives the first baffle (41) to move toward the first shell (1), the first baffle (41) is engaged with one side of the locking block (11), so that the handle (3) is locked and cannot be rotated, and after the locking plate (4) drives the second baffle (42) to move toward the second shell (2), the first baffle (41) is no longer engaged with the locking block (11), so that the handle (3) is unlocked and can be rotated; The locking plate (4) comprises a first plug plate (43) and a second plug plate (44); one end of the first plug plate (43) is provided with a slot (45) located in the plug hole (31), and the other end is connected to the first baffle plate (41); one end of the second plug plate (44) is provided with a plug (46) located in the plug hole (31), and the other end is connected to the second baffle plate (42); the plug (46) is inserted into the slot (45) to fixedly connect the first plug plate (43) and the second plug plate (44); A limiting groove (53) is provided between the first baffle plate (41) and the second baffle plate (42) and the handle (3); a limiting block (6) is movably provided on the first plug plate (43) and the second plug plate (44); and a limiting portion (61) is provided on the limiting block (6) which enters the limiting groove (53) after rotation, so as to prevent the first plug plate (43) and the second plug plate (44) from moving horizontally in the plug hole (31); The first baffle plate (41) and the second baffle plate (42) are provided with mounting grooves (5), a mounting shaft (51) is provided in the mounting grooves (5), an opening (52) communicating with the limiting groove (53) is provided above the mounting shaft (51), and after the limiting block (6) rotates, the limiting portion (61) rotates into the limiting groove (53); A positioning block (62) is provided on one side of the limit block (6), and the positioning block (62) is abutted against the upper part of one side of the opening (52); and a strip-shaped rotation groove (63) is provided on the outer side of the limit block (6).

2. The miniature circuit breaker according to claim 1, characterized in that: The second shell (2) is provided with a guide groove (21), and the second baffle (42) is provided with a guide column (47) that fits and is inserted into the guide groove (21); when the handle (3) is rotated, the guide column (47) is driven to move along the guide groove (21).

3. The miniature circuit breaker according to claim 1, characterized in that: A plurality of locking blocks (11) are provided and arranged in an arc shape, and locking grooves (12) for the first baffle plate (41) to be inserted into are provided between adjacent locking blocks (11).

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