Operating mechanism of miniature circuit breaker

Abstract

The utility model provides an operating mechanism of a miniature circuit breaker, which comprises a contact support which is rotatably mounted on a shell through a rotating shaft and comprises a contact mounting plate and a baffle plate vertically arranged on one side of the contact mounting plate, at least one barrier strip which extends outwards and is parallel to the contact mounting plate is arranged on the inner wall of the baffle plate, and the contact mounting plate is arranged on the contact support. The barrier strip and the contact mounting plate are opposite to each other to form a first slot into which the moving contact is inserted; and the moving contact rotates around the rotating shaft and is provided with a through hole for the rotating shaft to pass through, and the rotating shaft is a metal shaft. The moving contact rotates around the metal shaft, and the metal shaft is not easy to deform, so that the contact pressure of the contact is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, concretely relates to a kind of operating mechanism of miniature circuit breaker. BACKGROUND

[0002] Miniature circuit breaker refers to the protection electrical apparatus installed in terminal distribution line, prevent the fire safety hazard caused by overload, short circuit and the like, and guarantee the safety of electricity.

[0003] The existing miniature circuit breaker includes contact support and movable contact installed on the contact support, in order to ensure that the movable contact and the static contact maintain a certain contact pressure, the contact support can also rotate a certain angle relative to the movable contact after the contact of the movable contact and the static contact, in the prior art, the contact support is provided with a positioning column for the movable contact, since the positioning column is made of plastic material, it is easy to deform after long time contact with the movable contact at high temperature, so that the rotation of the movable contact may be stuck, and then the contact pressure is affected. SUMMARY

[0004] Therefore, the utility model wants to overcome the defect that the contact pressure in the prior art is affected, so as to provide an operating mechanism of miniature circuit breaker with high reliability.

[0005] Therefore, the utility model provides an operating mechanism of miniature circuit breaker, which includes contact support and movable contact, the contact support is rotatably installed on the shell through a rotating shaft, and includes contact mounting plate and baffle vertically arranged on one side of the contact mounting plate, at least one baffle strip is arranged on the inner wall of the baffle and extends outward and is parallel to the contact mounting plate, the baffle strip and the contact mounting plate form a first insertion slot for the movable contact, the movable contact rotates around the rotating shaft, and the rotating shaft is provided with a through hole for the rotating shaft, and the rotating shaft is a metal shaft.

[0006] Further comprising: a first torsional spring, which is sleeved on the rotating shaft and has a first branch and a second branch that extend outward and are arranged at a certain angle, the first branch abuts against the contact support, and the end of the second branch forms an L-shaped hook, and the L-shaped hook abuts against the part of the movable contact away from the baffle.

[0007] One side of the contact support away from the contact mounting plate is provided with a first reverse buckle, and the first reverse buckle and the contact mounting plate form a gap for the first branch to insert.

[0008] The shell is provided with an indication window, and the top of the contact support is formed with a first indication part corresponding to the indication window.

[0009] Further comprise: the lock catch, through the rotating shaft is installed on the shell, the lock catch is formed with the second indication part that can be arranged with the indication window corresponds, wherein, the contact support and the lock catch are different in color when injection molding.

[0010] The technical scheme has the following advantages:

[0011] 1. The operating mechanism of the miniature circuit breaker, the movable contact rotates around the rotating shaft, and the rotating shaft is provided with a through hole for the rotating shaft to pass through, and the rotating shaft is a metal shaft, so that the movable contact rotates around the metal shaft, the metal shaft is not easy to deform, thereby ensuring the contact pressure; in addition, the contact support comprises a contact mounting plate and a baffle vertically arranged on one side of the contact mounting plate, at least one baffle strip extending outward and arranged in parallel with the contact mounting plate is arranged on the inner wall of the baffle, the baffle strip and the contact mounting plate form a first insertion slot opposite to each other, and the second arm end of the first torsional spring forms an L-shaped hook; during assembly, after the movable contact is inserted into the first insertion slot, the L-shaped hook at the second arm end of the torsional spring is hooked against the part of the movable contact away from the baffle, thereby realizing the assembly of the movable contact and the contact support, and the above assembly structure is simple.

[0012] 2. The operating mechanism of the miniature circuit breaker, in the open state, the first indication part of the contact support is arranged corresponding to the indication window; in the closed state, the second indication part of the lock catch is arranged corresponding to the indication window, and since the color of the contact support and the lock catch is different when injection molding, compared with the prior art which needs to process different color indication surfaces on the contact support by silk printing after injection molding, the production process is simpler, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 It is the structure schematic diagram of the miniature circuit breaker of the utility model;

[0015] Figure 2 It is the assembly schematic diagram of the movable contact and the contact support;

[0016] Figure 3 It is the explosion structure schematic diagram of the movable contact and the contact support.

[0017] Explanation of reference numerals: 1, housing; 2, indication window; 7, contact support; 8, rotating shaft; 9, first indication part; 11, lock catch; 12, second indication part; 17, movable contact; 18, perforation; 19, contact mounting plate; 20, baffle; 21, baffle strip; 22, first insertion slot; 23, first torsional spring; 24, first supporting arm; 25, second supporting arm; 26, L-shaped hook; 27, first reverse buckle. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0022] EMBODIMENT

[0023] The present embodiment provides an operating mechanism of a miniature circuit breaker, as shown in Figure 1 and Figure 2 , comprising a contact support 7, a movable contact 17, a first torsional spring 23 and a lock catch 11.

[0024] As shown in Figure 1 , the housing 1 is provided with an indication window 2.

[0025] A contact holder 7 is rotatably mounted on the shell 1 through a rotating shaft 8, as shown in Figure 2 and Figure 3 The contact holder 7 includes a contact mounting plate 19 and a baffle 20 vertically arranged on one side of the contact mounting plate 19. The inner wall of the baffle 20 is provided with at least one baffle strip 21 extending outward and arranged in parallel with the contact mounting plate 19. The baffle strip 21 and the contact mounting plate 19 form a first insertion slot 22 for inserting the movable contact 17. The top of the contact holder 7 is formed with a first indicating part 9 corresponding to the indicating window 2.

[0026] The movable contact 17 rotates around the rotating shaft 8 and is formed with a through hole 18 for the rotating shaft 8. The rotating shaft 8 is a metal shaft.

[0027] A first torsion spring 23 is sleeved on the rotating shaft 8, as shown in Figure 3 The first torsion spring 23 has a first branch 24 and a second branch 25 extending outward and arranged at an angle. The first branch 24 abuts against the contact holder 7, and the end of the second branch 25 forms an L-shaped hook 26. The L-shaped hook 26 abuts against the movable contact 17 away from the baffle 20. The contact holder 7 is provided with a first undercut 27 away from the contact mounting plate 19. The first undercut 27 and the contact mounting plate 19 form a gap for inserting the first branch 24.

[0028] A lock catch 11 is rotatably mounted on the shell 1 through the rotating shaft 8, as shown in Figure 1 The lock catch 11 is formed with a second indicating part 12 corresponding to the indicating window 2. The color of the contact holder 7 and the lock catch 11 is different when they are injection molded, that is, different colored pigments are added during injection molding. It should be noted that the cooperation structure between the lock catch 11 and the contact holder 7 is a mature technology, and therefore the specific structure and working principle are not described in detail.

[0029] The utility model provides a small -size circuit breaker's operating mechanism, and dynamic contact 17 rotates around rotating shaft 8, and it is shaped with the perforation 18 of dynamic contact 17 is around metal shaft 8 rotation, metal shaft 8 is not easy to deformation, thereby guaranteed contact pressure, in addition, contact support 7 includes contact mounting plate 19, and the baffle 20 of vertical in contact mounting plate 19 one side, the inner wall of baffle 20 is equipped with at least one blocking strip 21 of the outward extension, with contact mounting plate 19 parallel arrangement, and blocking strip 21 and contact mounting plate 19 opposite formation first slot 22, and the second arm 25 end of first torsional spring 23 forms L hook 26, when assembling, after dynamic contact 17 is inserted from first slot 22, and the L hook 26 of torsional spring 23 second arm 25 end is hooked with the part of dynamic contact 17 away from baffle 2 and is resisted, thereby realizes the assembly of dynamic contact and contact support, and the above-mentioned assembly structure is simple.

[0030] Obviously, the above-mentioned embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, on the basis of the above-mentioned description, other different forms of changes or variations can also be made. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived from still be within the scope of the utility model creates protection.

Claims

1. An operating mechanism of a miniature circuit breaker, characterized by The utility model relates to a kind of contactor, including: Contact support (7), it is rotatably installed on shell (1) by pivot (8), it includes contact mounting plate (19), and the baffle (20) vertically arranged in one side of the contact mounting plate (19), at least one baffle strip (21) is arranged on the inner wall of the baffle (20) and extends outward, with the contact mounting plate (19) parallel, the baffle strip (21) and the contact mounting plate (19) are opposite to form the first slot (22) for the insertion of movable contact (17); Movable contact (17), it rotates around the pivot (8), and it is formed with the perforation (18) for the pivot (8) to pass, and the pivot (8) is metal shaft.

2. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that Further including: First torsional spring (23), it is sleeved on the pivot (8), with the first branch (24) and second branch (25) that outwardly extend and are arranged at a certain angle, the first branch (24) and the contact support (7) are opposite, and the end of the second branch (25) forms L-shaped hook (26), L-shaped hook (26) and the part of movable contact (17) away from the baffle (20) are hooked and opposite.

3. The operating mechanism of a miniature circuit breaker according to claim 2, characterized in that The side of the contact support (7) away from the contact mounting plate (19) is provided with first reverse buckle (27), and the first reverse buckle (27) and the contact mounting plate (19) form the gap for the insertion of the first branch (24).

4. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that Shell (1) is provided with indicating window (2), and the top of the contact support (7) is formed with the first indicating portion (9) that can be arranged correspondingly with the indicating window (2).

5. The operating mechanism of a miniature circuit breaker according to claim 4, characterized in that Further including: Lock catch (11), it is rotatably installed on shell (1) by the pivot (8), and the lock catch (11) is formed with the second indicating portion (12) that can be arranged correspondingly with the indicating window (2), wherein the color of the contact support (7) and the lock catch (11) is different when injection molding.

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