Double-contact circuit breaker

Abstract

The utility model discloses a double-contact circuit breaker, which belongs to the technical field of circuit breakers and comprises a circuit breaker box body, a handle piece is arranged on the upper portion of an inner cavity of the circuit breaker box body, and a lock catch and a moving contact integrated rod piece are respectively arranged below the handle piece and located in the inner cavity of the circuit breaker box body. One end of the lock catch at the middle upper part of the circuit breaker box body is an indicating end, one end of the contact integrated rod piece is connected with a mechanism spring through a connecting assembly, and one side of a bottom driving end of the handle piece is in contact with the outer wall of the lock catch through a handle spring; the end, away from the handle piece, of the handle spring is provided with a protruding point part located on the outer wall of the upper cover of the circuit breaker box body. And in an opening state, the long arm of the handle spring can be in contact with the lock catch to provide reset force for the lock catch. The laminated assembly mode is realized, the assembly process is simplified, the size control is centralized, the quality control is facilitated, the cost advantage is obvious, and the market competitiveness of the product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, in particular to a double-contact circuit breaker. Background Art

[0002] Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, and protect power lines and motors. When they are seriously overloaded or short-circuited or undervoltage, they can automatically cut off the circuit. Their function is equivalent to the combination of fuse switches and overheating relays. Moreover, there is generally no need to change parts after breaking the fault current. At present, they have been widely used.

[0003] At present, the existing technology of miniature circuit breaker double contact mechanism scheme is a four-link structure, the mechanism is generally composed of an upper cover, a base, a handle, a handle spring, a U-shaped rod, a jumper, a jumper shaft pin, a lock, an indicator, a contact bracket, a main shaft, a tension spring shaft, a moving contact shaft pin, an upper moving contact, a lower moving contact, a soft copper wire, an upper moving contact spring, a lower moving contact spring, a mechanism spring, and a lock reset spring, and the number of parts reaches 20. Because the mechanism adds a moving contact and its contact parameters, the scheme design is complicated, the assembly is difficult, the number of parts and the process steps are large, resulting in low production efficiency and difficult quality control. Utility Model Content

[0004] The purpose of the utility model is to provide a double-contact circuit breaker to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-contact circuit breaker, comprising a circuit breaker box body, a handle member is arranged at the upper part of the inner cavity of the circuit breaker box body, a lock and a moving contact integrated rod member are arranged below the handle member and located in the inner cavity of the circuit breaker box body, one end of the lock member at the upper middle part of the circuit breaker box body is arranged as an indication end, one end of the contact integrated rod member is connected to a mechanism spring through a connecting assembly, one side of the bottom driving end of the handle member contacts the outer wall of the lock member through the handle spring, and a convex portion is arranged at one end of the handle spring away from the handle member and located on the outer wall of the upper cover of the circuit breaker box body.

[0006] Preferably, a U-shaped rod is clamped on the other side of the bottom driving end of the handle member, and a jump buckle is connected to the end of the U-shaped rod away from the handle member.

[0007] Preferably, one end of the jumper away from the U-shaped rod is connected to the top end of the contact integrated rod through a jumper pin;

[0008] The contact integrated rod is an inverted Y-shaped rod structure.

[0009] Preferably, the bottom of the contact integrated rod is in a fork structure, and the lower part of the contact integrated rod is respectively provided with an upper moving contact and a lower moving contact.

[0010] Preferably, a soft copper wire is provided on the upper outer wall of the contact integrated rod, the soft copper wire is in a U-shaped structure, and the soft copper wire is clamped and wrapped on the upper outer wall of the contact integrated rod.

[0011] Preferably, the connecting assembly comprises a tension spring shaft and a connecting piece, the tension spring shaft is fixedly mounted on the inner wall of the circuit breaker box body, and the connecting piece is sleeved on the upper part of the contact integrated rod.

[0012] Preferably, two ends of the mechanism spring are respectively connected to the tension spring shaft and the connecting piece, and an upper outer wall of the contact integrated rod is provided with a connecting hole for installing the connecting piece.

[0013] Preferably, the contact integrated rod is connected to the lock through a main shaft.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0015] The double-contact circuit breaker shrinks the conventional 4-link mechanism to a 3-link mechanism, eliminates the moving contact bracket and the moving contact shaft pin, reduces the size chain, reduces the hole-shaft matching of the parts, integrates the size into one part, and has better control over the parameters of batch contacts; integrates the two springs, and through the design of the length of each torque arm, makes the handle reset force very large and the lock reset force very small; in the closed state, the handle spring is separated from the lock, and the tripping force between the lock and the tripping buckle is not affected by the spring, and there is only a friction force, which makes the product tripping force more stable; when in the open state, the long arm of the handle spring can contact the lock again, which can provide it with a reset force. A stacked assembly method is realized, the assembly process is simplified, the size control is centralized, which is conducive to quality control, and the cost advantage is obvious, which improves the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the connection state of the mechanism spring of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the handle spring of the utility model in the open state;

[0020] Figure 4 It is a structural schematic diagram of the mechanism spring of the utility model in the open state;

[0021] Figure 5 It is a structural schematic diagram of the contact integrated rod of the utility model in the closed state;

[0022] Figure 6 It is a structural schematic diagram of the handle spring of the utility model in the closed state.

[0023] Description of reference numerals:

[0024] In the figure: 1. handle; 2. lock; 3. jumper; 4. pin shaft; 5. soft copper wire; 6. upper moving contact; 7. lower moving contact; 8. handle spring; 9. main shaft; 10. mechanism spring; 11. U-shaped rod; 12. tension spring shaft; 13. connecting piece; 14. circuit breaker box; 15. indication end; 16. connecting hole; 17. contact integrated rod; 18. convex point. DETAILED DESCRIPTION

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0026] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0027] This embodiment discloses Figures 1 to 6 A double-contact circuit breaker shown in the figure includes a circuit breaker box body 14, a handle member 1 is arranged on the upper part of the inner cavity of the circuit breaker box body 14, a lock 2 and a moving contact integrated rod member 17 are arranged below the handle member 1 and in the inner cavity of the circuit breaker box body 14, respectively. The moving contact is designed to be integrated, and the conventional 4-link mechanism is reduced to a 3-link mechanism, and the moving contact bracket and the moving contact shaft pin are eliminated, the dimension chain is reduced, the hole-shaft matching of the parts is reduced, the dimensions are integrated into one part, and the parameters of batch contacts are better controlled.

[0028] One end of the lock 2 in the upper middle part of the circuit breaker box body 14 is set as the indicating end 15, and one end of the contact integrated rod 17 is connected to the mechanism spring 10 through a connecting assembly. One side of the bottom driving end of the handle member 1 contacts the outer wall of the lock 2 through the handle spring 8. The handle spring 8, in the micro-breaker L7 with lock and jump buckle structure, the spring must meet the requirements of large handle reset force and small lock reset force to meet the mechanism reset requirement. Usually, it is realized by two springs (handle spring, lock reset spring), and this embodiment integrates the two springs. By designing the length of each torque arm, the handle reset force is large and the lock reset force is small.

[0029] A convex portion 18 is provided on the outer wall of the upper cover of the circuit breaker box body 14 and is away from one end of the handle spring 8. The handle spring 8 is designed with a convex point on the upper cover. In the closed state, the handle spring is separated from the lock. At this time, the tripping force between the lock and the tripping buckle is not affected by the spring, and there is only a friction force, which makes the product tripping force more stable; when in the open state, the long arm of the handle spring can contact the lock, which can provide it with a reset force.

[0030] Specifically, a U-shaped rod 11 is clamped on the other side of the bottom driving end of the handle member 1 , and a jump buckle 3 is connected to one end of the U-shaped rod 11 away from the handle member 1 .

[0031] Specifically, one end of the trip button 3 away from the U-shaped rod 11 is connected to the top of the contact integrated rod 17 through the trip button pin 4;

[0032] The contact integrated rod 17 is an inverted Y-shaped rod structure.

[0033] Specifically, the bottom of the contact integrated rod 17 is in a fork structure, and the lower portion of the contact integrated rod 17 is provided with an upper moving contact 6 and a lower moving contact 7 .

[0034] Specifically, the upper outer wall of the contact integrated rod 17 is provided with a soft copper wire 5 , the soft copper wire 5 is in a U-shaped structure, and the soft copper wire 5 is clamped and wrapped on the upper outer wall of the contact integrated rod 17 .

[0035] Specifically, the connecting assembly includes a tension spring shaft 12 and a connecting member 13 . The tension spring shaft 12 is fixedly mounted on the inner wall of the circuit breaker box body 14 , and the connecting member 13 is sleeved on the upper portion of the contact integrated rod 17 .

[0036] Specifically, the two ends of the mechanism spring 10 are respectively connected to the tension spring shaft 12 and the connecting piece 13. The upper outer wall of the contact integrated rod 17 is provided with a connecting hole 16 for installing the connecting piece 13. The mechanism spring 10 and the connecting piece 13 can provide both the mechanism reset force and the contact final pressure to the upper moving contact and the lower moving contact, thereby eliminating the upper and lower contact springs.

[0037] Specifically, the contact integrated rod 17 is connected to the lock buckle 2 through the main shaft 9 .

[0038] How it works

[0039] In the double-contact circuit breaker, when in the open state, the lock 2 adds an indication function, the mechanism spring 8, and the connector 13 can provide both the mechanism reset force and the contact final pressure for the upper and lower moving contacts, eliminating the upper and lower contact springs and the handle spring. In the micro-breaker L7 with lock and jump buckle structure, the spring must meet the requirements of large handle reset force and small lock reset force to meet the mechanism reset requirements, which are usually achieved by two springs (handle spring and lock reset spring). This solution integrates the two springs, and through the design of the length of each moment arm, the handle reset force is large and the lock reset force is small;

[0040] When in the closed state, the handle spring 8 is designed with a convex point on the upper cover, so that the handle spring is separated from the lock. At this time, the tripping force between the lock and the tripping buckle is not affected by the spring, and there is only a friction force, which makes the product tripping force more stable; when in the open state, the long arm of the handle spring can contact the lock again, which can provide it with a reset force. The moving contact is integrated into the design, and the conventional 4-bar linkage is reduced to a 3-bar linkage, and the moving contact bracket and moving contact shaft pin are eliminated, the size chain is reduced, the part hole and shaft matching are reduced, the size is integrated into one part, and the batch contact parameters are better controlled.

[0041] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-contact circuit breaker, comprising a circuit breaker box (14), characterized in that: A handle member (1) is provided at the upper part of the inner cavity of the circuit breaker case (14); a lock catch (2) and a moving contact integrated rod member (17) are provided below the handle member (1) and in the inner cavity of the circuit breaker case (14); one end of the lock catch (2) at the upper middle part of the circuit breaker case (14) is provided as an indicating end (15); one end of the contact integrated rod member (17) is connected to a mechanism spring (10) via a connecting assembly; one side of the bottom driving end of the handle member (1) contacts the outer wall of the lock catch (2) via a handle spring (8); and a convex point portion (18) is provided at one end of the handle spring (8) away from the handle member (1) and located on the outer wall of the upper cover of the circuit breaker case (14).

2. A double-contact circuit breaker according to claim 1, characterized in that: A U-shaped rod (11) is clamped on the other side of the bottom driving end of the handle member (1), and a jump buckle (3) is connected to one end of the U-shaped rod (11) away from the handle member (1).

3. A double-contact circuit breaker according to claim 2, characterized in that: One end of the trip lock (3) away from the U-shaped rod (11) is connected to the top end of the contact integrated rod (17) via a trip lock pin shaft (4); The contact integrated rod (17) is an inverted Y-shaped rod structure.

4. A double-contact circuit breaker according to claim 3, characterized in that: The bottom of the contact integrated rod (17) is in a fork structure, and the lower part of the contact integrated rod (17) is respectively provided with a moving contact upper (6) and a moving contact lower (7).

5. A double-contact circuit breaker according to claim 4, characterized in that: The upper outer wall of the contact integrated rod (17) is provided with a soft copper wire (5), the soft copper wire (5) is in a U-shaped structure, and the soft copper wire (5) is clamped and wrapped on the upper outer wall of the contact integrated rod (17).

6. A double-contact circuit breaker according to claim 5, characterized in that: The connecting assembly comprises a tension spring shaft (12) and a connecting piece (13); the tension spring shaft (12) is fixedly mounted on the inner wall of a circuit breaker box body (14); and the connecting piece (13) is sleeved on the upper part of the contact integrated rod (17).

7. A double-contact circuit breaker according to claim 6, characterized in that: The two ends of the mechanism spring (10) are respectively connected to the tension spring shaft (12) and the connecting piece (13), and the upper outer wall of the contact integrated rod (17) is provided with a connecting hole (16) for installing the connecting piece (13).

8. A double-contact circuit breaker according to claim 7, characterized in that: The contact integrated rod (17) is connected to the lock buckle (2) via a main shaft (9).

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