Pull ring mechanism of plug-in circuit breaker and circuit breaker

Abstract

The present invention relates to a pull ring mechanism and a circuit breaker for a plug-in circuit breaker. The plug-in circuit breaker includes a housing and a handle operating part. The housing includes a front end face and a rear end face that are arranged opposite to each other. The front end face is provided with a handle mounting opening and a wire outlet. The handle operating part is installed in the handle mounting opening. The pull ring mechanism includes a pull ring. The front end of the housing is provided with a horizontal slide groove that is perpendicular to the front end face. The pull ring is installed in the horizontal slide groove. At the same time, the front end of the pull ring extends out of the housing to separate the front end face up and down. The handle mounting opening and the wire outlet are respectively located on the upper and lower sides of the extended end of the pull ring. Compared with the prior art, the present invention improves the convenience of pulling out the plug-in circuit breaker by arranging a pull ring on the housing. At the same time, the pull ring can also serve as a partition to separate the handle operating part and the wires of the terminal, thereby avoiding interference of the wires with the handle operating part, overcoming the defect that the opening and closing switches cannot move into place, and improving safety.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage circuit breakers, and in particular to a pull ring mechanism of a plug-in circuit breaker and the circuit breaker. Background Art

[0002] In recent years, plug-in circuit breakers have been increasingly used. Especially with the rapid development of the 5G industry, the demand for 5G cabinets is increasing, and the plug-in circuit breakers used with them are increasingly valued by manufacturers.

[0003] The Chinese invention application with publication number CN107993900A discloses a plug-in miniature circuit breaker. This invention application is for the most common plug-in circuit breaker on the market. The plug-in circuit breaker adopts a button-type structure. When the button is pressed, the circuit breaker closes; when the button is pulled out, the circuit breaker opens. However, this structure is prone to the problem of misoperation when the circuit breaker falls out of the cabinet. To solve this problem, the Chinese invention application with application number 202010287069.2 provides a plug-in circuit breaker opening and closing handle mechanism, which controls closing and opening by rotating the handle rocker arm, and operates the locking member by linear movement.

[0004] However, the above structures all have the following shortcomings: 1. The height and width of the plug-in circuit breaker are only about 4x2cm, and the front face of the circuit breaker needs to be provided with a handle operating part (button or handle rocker arm) and a wire outlet to connect the outlet terminal. The installation space of the cabinet is relatively small, which causes the wires of the outlet terminal to be pressed against the handle operating part, causing inconvenience to the user. The interference of the wires on the handle operating part is also prone to the risk of inadequate closing (virtual closing), and the risk of inadequate opening of the product in the event of a short circuit / overload fault, posing a greater safety hazard to users. 2. Plug-in circuit breakers are generally pulled out of the cabinet by the handle operating part. Due to the small size of the plug-in circuit breaker, especially the smaller contact area of ​​the handle rocker arm or button, and the large pulling force required, it is difficult for the user to pull it out of the cabinet. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a pull ring mechanism and a circuit breaker for a plug-in circuit breaker, thereby improving the convenience of pulling and isolating the wires of the terminal and the handle operating part, thereby improving the safety of users' electricity use.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A pull ring mechanism for a plug-in circuit breaker, the plug-in circuit breaker includes a shell and a handle operating part, the shell includes a front end face and a rear end face arranged opposite to each other, the front end face is provided with a handle mounting opening and a wire outlet, the handle operating part is installed in the handle mounting opening, and is characterized in that the pull ring mechanism includes a pull ring, the front end of the shell is provided with a horizontal slide groove perpendicular to the front end face, the pull ring is installed in the horizontal slide groove, and the front end portion of the pull ring extends out of the shell to separate the front end face up and down, and the handle mounting opening and the wire outlet are respectively located on the upper and lower sides of the extended end of the pull ring.

[0008] Furthermore, the pull ring mechanism also includes a locking member, which is hinged in the shell through a locking shaft and a torsion spring, and a shell opening is provided on the top surface of the shell. The locking member includes a linkage portion and a boss portion, and the boss portion extends from the shell opening. The linkage portion is used to contact the rear end of the pull ring. When the pull ring moves along the horizontal slide groove toward the front end of the shell, the rear end of the pull ring drives the linkage portion to rotate the locking member along the locking shaft, so that the boss portion retracts from the shell opening.

[0009] Furthermore, a limit block is provided above the horizontal chute, and a protrusion is provided at the rear end of the pull ring. When the pull ring moves to a certain position in the horizontal chute, the limit block contacts the protrusion to limit the movement of the pull ring.

[0010] Furthermore, two limiting blocks are included, and the protrusion moves between the two limiting blocks.

[0011] Furthermore, the pull ring is a rectangular pull ring.

[0012] Furthermore, the pull ring is a metal pull ring.

[0013] Furthermore, the handle operating part is a button or a rotary handle.

[0014] A plug-in circuit breaker comprises a pull ring mechanism as described above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention improves the convenience of pulling out the plug-in circuit breaker by providing a pull ring on the housing. The user can easily pull it out by hand or with auxiliary tools. At the same time, the pull ring can also serve as a partition to separate the handle operating part and the wires of the terminal blocks, preventing the wires from interfering with the handle operating part, overcoming the defect of the opening and closing switches not being able to move into place, and improving safety.

[0017] 2. The present invention also provides a locking member to improve the stability of the plug-in circuit breaker installed in the cabinet, and the locking member and the pull ring are linked. On the one hand, this structure makes the exposed aperture larger when the circuit breaker is pulled out, making it easier to operate; on the other hand, the pull ring directly drives the locking member to unlock during the movement, allowing the plug-in circuit breaker and the cabinet to be separated smoothly, and the operation is more integrated.

[0018] 3. The present invention prevents the pull ring from falling out of the horizontal chute during movement by providing a limit block on the horizontal chute and a protrusion at the rear end of the pull ring, thereby improving structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of Example 1.

[0020] Figure 2 This is a partial internal structure diagram of Example 1.

[0021] Figure 3 This is a structural diagram of Example 2.

[0022] Figure 4 This is a partial internal structure diagram of Example 2.

[0023] Figure numerals: 1. shell, 11. handle mounting port, 12. wire outlet, 13. horizontal slide groove, 14. shell opening, 15. limit block, 2. handle operating part, 3. pull ring mechanism, 31. pull ring, 31a. protrusion, 32. locking member, 32a. linkage part, 32b. boss part, 33. locking shaft, 34. torsion spring. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0025] Example 1

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a pull-ring mechanism for a plug-in circuit breaker, which is installed in a plug-in circuit breaker. The plug-in circuit breaker itself includes a housing 1 and a handle operating portion 2. The housing 1 includes a front face and a rear face that are arranged opposite each other. The front face is provided with a handle mounting opening 11 and a wire outlet 12. The handle operating portion 2 is installed in the handle mounting opening 11. The handle operating portion 2 can be a button or a rotary handle structure. The circuit breaker is opened and closed by changing the position of the handle operating portion 2. The handle operating portion 2 in this embodiment is preferably a rotary handle.

[0027] The pull ring mechanism 3 includes a pull ring 31. The front end of the shell 1 is provided with a horizontal slide 13 perpendicular to the front end face. The horizontal slide 13 can be a slide rail structure. In this embodiment, the horizontal slide 13 is composed of the internal partition of the outlet 12 and is a horizontal plane. The pull ring 31 is installed on the horizontal plane. A limiting block 15 is provided above the horizontal slide 13, and the pull ring 31 is installed between the horizontal slide 13 and the limiting block 15 to form a vertical limit for the pull ring 31. A protrusion 31a is provided at the rear end of the pull ring 31, and the specific number of the limiting blocks 15 is two. When the pull ring 31 moves in the horizontal slide 13, the protrusion 31a moves between the two limiting blocks 15. When the pull ring 31 is installed on the horizontal slide 13, the front end of the pull ring 31 extends out of the shell 1 to form an upper and lower partition of the front end face. The handle mounting opening 11 and the cable outlet 12, located on the front face, are located above and below the extended end of the pull ring 31. In this embodiment, the handle mounting opening 11 is located on the upper side, and the cable outlet 12 is located on the lower side. The front end of the pull ring 31 can be arc-shaped, horseshoe-shaped, trapezoidal, rectangular, or other shapes, with no particular limitation. The rear end of the pull ring 31 is rectangular, allowing it to fit neatly into the horizontal chute 13. In this embodiment, a generally rectangular pull ring 31 is used for the simplest structure. The pull ring 31 can be made of a variety of materials, including metal and hard plastic, with metal being preferred.

[0028] The operating principle of this embodiment is as follows: when the plug-in circuit breaker is in the cabinet, the pull ring 31 is in a semi-retracted state, with its exposed front end forming a partition that separates the handle operating unit 2 from the wires of the terminal blocks. This prevents interference between the wires and the handle operating unit 2, overcomes the problem of incomplete movement during opening and closing, and improves safety. When the plug-in circuit breaker needs to be pulled out of the cabinet, the user slightly moves the pull ring 31 with a tool or finger. At this time, the pull ring 31 will initially extend outward, increasing the aperture of the pull ring 31, making it easier for the tool or finger to enter, allowing the circuit breaker to be pulled out smoothly, improving operational convenience.

[0029] Example 2

[0030] like Figure 3 and Figure 4As shown, the overall structure of this embodiment is the same as that of the first embodiment, with the difference being that the pull ring mechanism 3 further includes a locking member 32. The locking member 32 includes a linkage portion 32a and a boss portion 32b that are interconnected, and the connection between the linkage portion 32a and the boss portion 32b is hinged in the housing 1 through a locking shaft 33 and a torsion spring 34. Specifically, the torsion spring 34 is nested on the locking shaft 33, with one end fixedly connected to the locking member 32 and the other end fixed to the inner wall of the housing 1. The locking member 32 is located above and behind the pull ring 31. A housing opening 14 is provided at the top of the housing 1. Under normal circumstances, the locking member 32, under the action of the torsion spring 34, causes the boss portion 32b to always extend out of the housing 1 from the housing opening 14, thereby being fixed to the cabinet. When the plug-in circuit breaker needs to be pulled out from the cabinet, the rear end of the pull ring 31 drives the linkage portion 32a on the locking member 32 to move, so that the locking member 32 overcomes the restoring force of the torsion spring 34 and rotates around the locking shaft 33, and the boss portion 32b retracts from the housing opening 14 at the top of the housing 1 into the housing 1, thereby achieving separation.

[0031] The linkage structure of the locking member 32 and the pull ring 31 can not only improve the stability of the plug-in circuit breaker installed in the cabinet, but also directly drive the locking member 32 to unlock during the movement of the pull ring 31, so that the plug-in circuit breaker and the cabinet can be separated smoothly, and the operation integrity is better.

[0032] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A pull ring mechanism for a plug-in circuit breaker, the plug-in circuit breaker comprising a housing (1) and a handle operating portion (2), the housing (1) comprising a front end face and a rear end face arranged opposite to each other, the front end face being provided with a handle mounting opening (11) and a wire outlet (12), the handle operating portion (2) being mounted in the handle mounting opening (11), and characterized in that: The pull ring mechanism (3) includes a pull ring (31), and the front end of the housing (1) is provided with a horizontal slide groove (13) perpendicular to the front end surface. The pull ring (31) is installed in the horizontal slide groove (13), and the front end of the pull ring (31) extends out of the housing (1) to separate the front end surface up and down. The handle installation port (11) and the wire outlet (12) are respectively located on the upper and lower sides of the extended end of the pull ring (31); The pull ring mechanism (3) further includes a locking member (32), which is hinged in the housing (1) via a locking shaft (33) and a torsion spring (34). A housing opening (14) is provided on the top surface of the housing (1). The locking member (32) includes a linkage portion (32a) and a boss portion (32b). The boss portion (32b) extends from the housing opening (14). The linkage portion (32a) is used to contact the rear end of the pull ring (31). When the pull ring (31) moves toward the front end of the housing (1) along the horizontal slide groove (13), the rear end of the pull ring (31) drives the linkage portion (32a) to rotate the locking member (32) along the locking shaft (33), so that the boss portion (32b) retracts from the housing opening (14).

2. The pull ring mechanism of a plug-in circuit breaker according to claim 1, characterized in that: A limit block (15) is provided above the horizontal chute (13), and a protrusion (31a) is provided at the rear end of the pull ring (31). When the pull ring (31) moves to a certain position in the horizontal chute (13), the limit block (15) contacts the protrusion (31a) to limit the movement of the pull ring (31).

3. The pull ring mechanism of a plug-in circuit breaker according to claim 2, characterized in that: It comprises two limiting blocks (15), and the protrusion (31a) moves between the two limiting blocks (15).

4. The pull ring mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The pull ring (31) is a rectangular pull ring.

5. The pull ring mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The pull ring (31) is a metal pull ring.

6. The pull ring mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The handle operating part (2) is a button or a rotary handle.

7. A plug-in circuit breaker, characterized in that: The invention comprises a pull ring mechanism of a plug-in circuit breaker as claimed in any one of claims 1 to 6.

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