CN216250603U

CN216250603U - Operating mechanism of miniature circuit breaker

Info

Publication number: CN216250603U
Application number: CN202122982323.3U
Authority: CN
Inventors: 黄佳; 史克少; 赵质胜; 包晓忠; 潘畅
Original assignee: Zhejiang Tengen Intelligent Electrical Appliance Co ltd; Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Intelligent Electrical Appliance Co ltd; Zhejiang Tengen Electric Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-08
Anticipated expiration: 2031-11-26

Abstract

The utility model provides an operating mechanism of a miniature circuit breaker, which comprises a shell, a handle, a connecting rod, a contact support, a lock catch and a main torsion spring, wherein the handle, the connecting rod, the contact support, the lock catch and the main torsion spring are arranged on the shell, a moving contact is arranged on the contact support, the main torsion spring comprises a main torsion spring body, a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm extend outwards from two ends of the main torsion spring body respectively, a mounting column for the main torsion spring body to be sleeved on is formed on the shell, and a limiting block is arranged between the two first elastic arms and the second elastic arm, two side surfaces of the limiting block are respectively abutted against the corresponding first elastic arm and the second elastic arm, and the second elastic arm is suitable for abutting against the moving contact. The limiting block can limit the positions of the first elastic arm and the second elastic arm of the main torsion spring in advance, so that the assembly of subsequent components is facilitated, and the assembly efficiency is improved; in addition, the main torsion spring not only can provide the reset force supported by the contact, but also can provide the contact pressure of the movable contact and the static contact, so that the materials and the assembly procedures are reduced, and the production cost is reduced.

Description

Operating mechanism of miniature circuit breaker

Technical Field

The utility model relates to the technical field of low-voltage electric appliances, in particular to an operating mechanism of a miniature circuit breaker.

Background

The miniature circuit breaker is a protective electric appliance installed on a terminal distribution line and is mainly used for overload and short-circuit protection of lines and electric equipment.

As shown in fig. 8, an operating mechanism of an existing miniature circuit breaker includes a handle 01, a U-shaped connecting rod 02, a contact support 03, a trip, a latch 04, a support spring 05, and a contact torsion spring 06, wherein a moving contact 07 is installed on the contact support 03, the support spring 05 is used for driving the contact support 03 to reset, and the contact torsion spring 06 is installed on the contact support 03 and is used for providing a final pressure for the moving contact 07 to contact with a fixed contact. During assembly, the moving contact 07 and the contact torsion spring 06 need to be installed on the contact support 03 to form an assembly, and then the assembly is integrally assembled on the shell, and the assembly process adopts manual assembly, so that the assembly efficiency is low; in addition, since the bracket spring 05 and the contact torsion spring 06 need to be installed separately, material and assembly costs are increased.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defect of low assembly efficiency of the operating mechanism in the prior art, and to provide an operating mechanism of a miniature circuit breaker with high assembly efficiency.

Therefore, the utility model provides an operating mechanism of a miniature circuit breaker, which comprises a shell, a handle, a connecting rod, a contact support, a lock catch and a main torsion spring, wherein the handle, the connecting rod, the contact support, the lock catch and the main torsion spring are arranged on the shell, a moving contact is arranged on the contact support, the main torsion spring comprises a main torsion spring body, a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm extend outwards from two ends of the main torsion spring body respectively, a mounting column for the main torsion spring body to be sleeved on is formed on the shell, a limiting block is arranged between the two first elastic arms and the second elastic arm, two side surfaces of the limiting block are respectively abutted against the corresponding first elastic arm and the second elastic arm, and the second elastic arm is suitable for abutting against the moving contact.

The limiting block is provided with a first chamfer angle for guiding the first elastic arm to insert.

And a clamping groove matched with the second elastic arm is formed on the movable contact.

And a second chamfer for guiding the second elastic arm to insert is arranged at the front end of the clamping groove.

The moving contact has the contact board, and with the integrative bending connection of contact board, court the connecting plate that the casing curb plate direction extends, the connecting plate have with the spacing portion that the second elastic arm offseted to and the weld part fixed with the flexible connection line, the shaping has in the spacing portion the draw-in groove with the second chamfer.

The contact support is rotatably arranged on the shell through a main shaft, and the moving contact is provided with a first through hole for the main shaft to penetrate through and allowing the moving contact to move relative to the main shaft and a second through hole for a rivet to penetrate through so as to enable the moving contact and the contact support to be assembled.

The contact support is provided with a third through hole for the driving end of the connecting rod to insert and move, the middle of the inner wall of the third through hole is provided with a blocking part which can be abutted against the driving end, a first channel and a second channel which are respectively arranged on two sides of the blocking part and are mutually communicated, and the lock catch is provided with a first position for blocking the driving end so as to enable the driving end to be positioned in the first channel and a second position for releasing the blocking of the driving end and enabling the driving end to move towards the direction of the second channel under the action of external force.

The blocking portion has a guide ramp facilitating sliding movement of the driving end from the first channel to the second channel.

The lock catch is provided with a step which can be abutted against the driving end, and when the lock catch is in a closing state, the step and the blocking part are opposite to form a notch which is suitable for preventing the driving end from moving out.

The contact terminal is characterized by further comprising a lock catch torsion spring suitable for driving the lock catch to reset, one end of the lock catch torsion spring is abutted to the first barb on the lock catch, and the other end of the lock catch torsion spring is abutted to the second barb on the contact terminal support.

The technical scheme of the utility model has the following advantages:

1. the operating mechanism of the miniature circuit breaker provided by the utility model is characterized in that the shell is provided with the mounting column for sleeving the main torsion spring main body thereon and the limiting block arranged between the two first elastic arms and the second elastic arms, and two side surfaces of the limiting block are respectively abutted against the corresponding first elastic arms and the second elastic arms. The limiting block can limit the positions of the first elastic arm and the second elastic arm of the main torsion spring in advance, so that the assembly of subsequent components is facilitated, and the assembly efficiency is improved; in addition, the first elastic arm of the main torsion spring abuts against the limiting block, the second elastic arm abuts against the moving contact, and the moving contact is installed on the contact support, so that the main torsion spring can provide not only the reset force of the contact support, but also the contact pressure of the moving contact contacting with the static contact.

2. According to the operating mechanism of the miniature circuit breaker, the limiting block is provided with the first chamfer angle for the first elastic arm to be guided and inserted, and the first elastic arm can be installed on the shell along the first chamfer angle by pressing during assembly, so that the position of the torsion spring does not need to be adjusted by means of a tool, and the assembly is quicker and more convenient.

3. According to the operating mechanism of the miniature circuit breaker, the clamping groove matched with the second elastic arm is formed in the movable contact, the second chamfer angle for the second elastic arm to be inserted in a guiding mode is arranged at the front end of the clamping groove, so that the second elastic arm can slide into the clamping groove along the second chamfer angle through pressing, and the assembly is quicker and more convenient.

4. The utility model provides an operating mechanism of a miniature circuit breaker, wherein a third through hole for inserting a driving end of a connecting rod and moving the connecting rod is formed on a contact support, a blocking part which can be abutted against the driving end is arranged in the middle of the inner wall of the third through hole, a first channel and a second channel which are respectively arranged on two sides of the blocking part and are mutually communicated, and a lock catch is provided with a step which can be abutted against the driving end and has a first position for blocking the driving end so as to enable the driving end to be positioned in the first channel and a second position for releasing the blocking of the driving end and enabling the driving end to move towards the direction of the second channel under the action of external force. When the switch is switched on, the driving end of the connecting rod is positioned in the first channel, and the handle drives the contact to support rotation through the connecting rod, so that the movable contact is in contact communication with the fixed contact; when short circuit or overload occurs, the lock catch is switched from the first position to the second position under the action of external force, so that the blocking of the driving end of the connecting rod is removed, the connecting rod moves towards the direction of the second channel, and the contact supports the reset acting force of the main torsion spring to drive the moving contact and the static contact to be separated and disconnected, so that brake opening is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a circuit breaker according to the present invention;

FIG. 2 is a schematic view of the assembly of the main torsion spring with the housing;

fig. 3 is a schematic structural view of an operating mechanism of the miniature circuit breaker;

fig. 4 is another structural schematic diagram of the operating mechanism of the miniature circuit breaker;

fig. 5 is a perspective view of the movable contact;

FIG. 6 is a schematic view of a contact support structure;

FIG. 7 is a perspective view of the latch;

fig. 8 is a schematic structural diagram of an operating mechanism of a small and medium sized circuit breaker in the prior art.

Description of reference numerals: 01. a handle; 02. a U-shaped connecting rod; 03. a contact support; 04. locking; 05. a bracket spring; 06. a contact torsion spring; 07. a moving contact;

1. a housing; 2. a handle; 3. a connecting rod; 4. a contact support; 5. locking; 6. a main torsion spring; 7. a moving contact; 8. a main torsion spring body; 9. a first resilient arm; 10. a second resilient arm; 11. mounting a column; 12. a limiting block; 13. a first chamfer; 14. a card slot; 15. a second chamfer; 16. a contact plate; 17. a connecting plate; 18. a limiting part; 19. welding the part; 20. a main shaft; 21. a first perforation; 22. a second perforation; 23. a driving end; 24. a third perforation; 25. a blocking portion; 26. a first channel; 27. a second channel; 28. a step; 29. a notch; 30. a locking torsion spring; 31. a first barb; 32. a second barb.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides an operating mechanism of a miniature circuit breaker, as shown in fig. 1, 3 and 4, including a housing 1, and a handle 2, a connecting rod 3, a contact support 4, a latch 5, a main torsion spring 6, a movable contact 7, and a latch torsion spring 30, which are disposed on the housing 1.

Casing 1, as shown in fig. 2, it has the confession the erection column 11 on it is located to main torsional spring main part 8 cover, and locate two first elastic arm 9 with stopper 12 between the second elastic arm 10, the both sides face of stopper 12 respectively with main torsional spring 6 first elastic arm 9 with second elastic arm 10 offsets, stopper 12 has the confession first elastic arm 9 direction male first chamfer 13, the middle part of erection column 11 is equipped with and supplies main shaft 20 male slot.

A handle 2 rotatably mounted on the housing 1; and the connecting rod 3 is a U-shaped connecting rod, one end of the connecting rod 3 is connected with the handle 2, and the other end of the connecting rod is a driving end matched with the contact support 4.

The contact support 4 is rotatably mounted on the housing 1 through a main shaft 20, as shown in fig. 6, a third through hole 24 for inserting the driving end 23 of the connecting rod 3 and for moving is formed on the contact support 4, a blocking portion 25 capable of abutting against the driving end 23 is formed in the middle of the inner wall of the third through hole 24, and a first channel 26 and a second channel 27 are respectively arranged on two sides of the blocking portion 25 and are communicated with each other, and the blocking portion 25 has a guide inclined surface facilitating the driving end 23 to slide from the first channel 26 to the second channel 27. The contact support 4 is provided with a second barb 4.

The lock catch 5 is rotatably mounted on the housing 1 through the spindle 20, and as shown in fig. 7, the lock catch 5 is provided with a step 28 capable of abutting against the driving end 23, and the lock catch 5 has a first position for blocking the driving end 23 to be located in the first channel 26 and a second position for releasing the blocking of the driving end 23 and moving the driving end 23 toward the second channel 27 under the action of external force. In the closed state, the step 28 and the blocking portion 25 form a notch 29 opposite to each other, which is adapted to prevent the driving end 23 from moving out.

And one end of the lock catch torsion spring 30 abuts against the first barb 31 on the lock catch 5, and the other end abuts against the second barb 32 on the contact support 4, and the lock catch torsion spring 30 is suitable for applying an elastic acting force moving towards the first position direction to the lock catch torsion spring 30.

The main torsion spring 6 comprises a main torsion spring main body 8, and a first elastic arm 9 and a second elastic arm 10 which respectively extend outwards from two ends of the main torsion spring main body 8, wherein the first elastic arm 9 abuts against one side face of the limiting block 12, and the second elastic arm 10 abuts against the moving contact 7.

The moving contact 7 has a contact plate 16, and with the integrative bending connection of contact plate 16, towards connecting plate 17 that the side plate direction of casing 1 extends, connecting plate 17 have with spacing portion 18 that second elastic arm 10 offsets to and with the fixed welding part 19 of flexible connecting line, the shaping has on the spacing portion 18 second elastic arm 10 complex draw-in groove 14, the front end of draw-in groove 14 is equipped with the confession second elastic arm 10 direction male second chamfer 15. The movable contact 7 has a first through hole 21 for the main shaft 20 to pass through and allowing the movable contact 7 to move relative to the main shaft 20, and a second through hole 22 for a rivet to pass through so that the movable contact 7 is assembled with the contact support 4.

According to the operating mechanism of the miniature circuit breaker, the positions of the first elastic arm 9 and the second elastic arm 10 of the main torsion spring 6 can be limited in advance by the limiting block 12, so that the assembly of subsequent components is facilitated, and the assembly efficiency is improved; in addition, the first elastic arm 6 of the main torsion spring 3 abuts against the limiting block 12, the second elastic arm 10 abuts against the moving contact 7, and the moving contact 7 is installed on the contact support 4, namely, the main torsion spring 6 can provide not only the reset force of the contact support 4, but also the contact pressure of the moving contact 7 contacting with the fixed contact.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. An operating mechanism of a miniature circuit breaker comprises a shell (1), a handle (2), a connecting rod (3), a contact support (4), a lock catch (5) and a main torsion spring (6) which are arranged on the shell (1), wherein a moving contact (7) is arranged on the contact support (4), the main torsion spring (6) comprises a main torsion spring main body (8), a first elastic arm (9) and a second elastic arm (10) which respectively extend outwards from two ends of the main torsion spring main body (8), and is characterized in that a mounting column (11) for the main torsion spring main body (8) to be sleeved on and a limiting block (12) arranged between the two first elastic arms (9) and the second elastic arms (10) are formed on the shell (1), two side faces of the limiting block (12) are respectively abutted against the corresponding first elastic arms (9) and the second elastic arms (10), the second elastic arm (10) is suitable for abutting against the movable contact (7).

2. The operating mechanism of a small size circuit breaker according to claim 1 wherein the stopper (12) has a first chamfer (13) for guiding insertion of the first resilient arm (9).

3. The operating mechanism of a miniature circuit breaker according to claim 1 or 2 wherein said movable contact (7) is formed with a snap groove (14) cooperating with said second resilient arm (10).

4. The operating mechanism of a small size circuit breaker according to claim 3, wherein the front end of the card slot (14) is provided with a second chamfer (15) for guiding insertion of the second elastic arm (10).

5. The operating mechanism of a miniature circuit breaker according to claim 4, wherein said movable contact (7) has a contact plate (16), and a connecting plate (17) connected with said contact plate (16) in an integral bending manner and extending towards the side plate of said housing (1), said connecting plate (17) has a limiting portion (18) abutting against said second elastic arm (10), and a welding portion (19) fixed with a flexible connecting wire, said limiting portion (18) is formed with said slot (14) and said second chamfer (15).

6. The operating mechanism of a miniature circuit breaker according to claim 1, wherein said contact support (4) is rotatably mounted on said housing (1) by means of a main shaft (20), said movable contact (7) having a first through hole (21) for said main shaft (20) to pass through and allowing said movable contact (7) to move relative to said main shaft (20), and a second through hole (22) for a rivet to pass through so as to fit said movable contact (7) with said contact support (4).

7. The operating mechanism of the miniature circuit breaker according to claim 1, wherein the contact support (4) is formed with a third through hole (24) for inserting and moving the driving end (23) of the connecting rod (3), the middle portion of the inner wall of the third through hole (24) is provided with a blocking portion (25) capable of abutting against the driving end (23), and a first channel (26) and a second channel (27) which are respectively arranged at two sides of the blocking portion (25) and are communicated with each other, the latch (5) has a first position for blocking the driving end (23) to be located in the first channel (26), and a second position for unblocking the driving end (23) and moving the driving end (23) towards the second channel (27) under the action of external force.

8. The operating mechanism of a small size circuit breaker according to claim 7 wherein the blocking portion (25) has a guide slope facilitating the sliding movement of the driving end (23) from the first channel (26) to the second channel (27).

9. Operating mechanism of a miniature circuit breaker according to claim 7 or 8 wherein said latch (5) has a step (28) which can abut against said actuation end (23), said step (28) forming a notch (29) opposite said blocking portion (25) adapted to prevent said actuation end (23) from moving out in the closed position.

10. The operating mechanism of a miniature circuit breaker according to claim 7 or 8 further comprising a latch torsion spring (30) adapted to drive said latch (5) to return, said latch torsion spring (30) having one end abutting against a first barb (31) on said latch (5) and another end abutting against a second barb (32) on said contact support (4).