Circuit breaker with simplified torsion spring

Abstract

The utility model discloses a circuit breaker with a simplified torsion spring. The problems that a conventional circuit breaker needs two torsion springs to be matched with a support and a moving contact respectively, the cost is high, and the structure is complex are mainly solved. The device is characterized by further comprising a torsion spring (4), the torsion spring comprises a middle ring (41) and at least two pins (42), a pin shaft (21) used for being sleeved with the middle ring is arranged in the shell, one pin abuts against the inner wall of the shell, and the other pin abuts against the outer wall of the shell. The other pin abuts against the moving contact and is used for driving the moving contact to rotate towards a static contact (7) and driving the support to rotate towards an opening direction. According to the circuit breaker with the simplified torsion spring, the torsion spring acts on the support and the moving contact at the same time, the structure is simplified, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a circuit breaker with a streamlined torsion spring. Background Art

[0002] A miniature circuit breaker, also known as a small circuit breaker, is used for overload and short-circuit protection of circuits, and can also be used for infrequent operation conversion of circuits under normal conditions. Miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise buildings, and civil residences.

[0003] As shown in the Chinese patent with the publication number CN 116936311 A, the tripping structure of a circuit breaker usually includes a bracket, a moving contact, a latch, etc. Generally, a torsion spring for the bracket and a torsion spring for the moving contact are required for resetting and pre-tightening, that is, at least two torsion springs are required, resulting in higher costs and a more complex structure. Content of the Utility Model

[0004] In order to overcome the deficiencies of the background art, the utility model provides a circuit breaker with a streamlined torsion spring, mainly solving the problems that a conventional circuit breaker requires two torsion springs to respectively adapt to the bracket and the moving contact, resulting in higher costs and a more complex structure.

[0005] The technical solution of the utility model is as follows.

[0006] A circuit breaker with a streamlined torsion spring includes a housing, and a tripping mechanism is arranged inside the housing. The tripping mechanism includes a bracket rotatably installed inside the housing, and a moving contact rotatably arranged on the bracket. It also includes

[0007] a torsion spring, the torsion spring includes a middle ring and at least two pins. A pin shaft for sleeving the middle ring is arranged inside the housing. One pin abuts against the inner wall of the housing, and the other pin abuts against the moving contact to drive the moving contact to rotate towards the static contact direction,

[0008] and at the same time, it is used to drive the bracket to rotate towards the tripping direction.

[0009] The moving contact includes a shaft hole, a lower arm, and an upper arm. A moving contact point is arranged on the lower arm, and a stop wall is arranged on the upper arm. One pin applies a force on the outer wall of the stop wall.

[0010] A groove for partially inserting the pin is arranged on the stop wall.

[0011] The pin shaft is integrally arranged inside the housing. A shaft hole is arranged on the rotating shaft. The bracket is provided with a first rotating shaft and a second rotating shaft. The first rotating shaft is used for latch installation, and the second rotating shaft is hinged and matched with the shaft hole. The first rotating shaft and the second rotating shaft are coaxially arranged and are respectively arranged on two end faces of the bracket.

[0012] The bracket is provided with an arc-shaped wall, and at least part of the middle ring is correspondingly arranged inside the arc-shaped wall.

[0013] The bracket is provided with a first boss and a second boss arranged oppositely, and the moving contact is installed between the first boss and the second boss.

[0014] In the height direction, the retaining wall is arranged below the second rotating shaft.

[0015] The beneficial effect of the present utility model is that the present utility model provides a circuit breaker with a streamlined torsion spring. By using one torsion spring to act on the bracket and the moving contact simultaneously, the structure is streamlined and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an internal three-dimensional schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a partial three-dimensional schematic diagram of an embodiment of the present utility model.

[0018] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the present utility model.

[0019] Figure 4 It is a three-dimensional schematic diagram of the moving contact of an embodiment of the present utility model.

[0020] Figure 5 It is a partial cross-sectional schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present utility model with reference to the drawings: As shown in the figure, a circuit breaker with a streamlined torsion spring includes a housing 1. A tripping mechanism is arranged inside the housing. The tripping mechanism includes a bracket 2 rotatably installed inside the housing. A moving contact 3 is rotatably arranged on the bracket. A torsion spring 4 is further included. The torsion spring includes a middle ring 41 and at least two pins 42. A pin shaft 21 for sleeving the middle ring is arranged inside the housing. One pin presses against the inner wall of the housing, and the other pin presses against the moving contact to drive the moving contact to rotate towards the static contact 7 and at the same time drive the bracket to rotate towards the opening direction.

[0022] First, refer to Figure 3 , the rotation axis X1 of the moving contact. When a pin of the torsion spring contacts the moving contact and applies a force F, this F pushes on the retaining wall on the upper arm, driving the moving contact to rotate counterclockwise around the axis X1 (that is, making the moving contact rotate towards the direction where the static contact is located as described in the text).

[0023] Then, the rotation axis X2 of the bracket will drive the bracket to rotate clockwise under the action of the force F (that is, the bracket rotates in the direction of opening the switch as mentioned above).

[0024] The other pin of the torsion spring presses against the boss 15 inside the housing.

[0025] In this embodiment, as shown in the figure, the moving contact includes a shaft hole 31, a lower arm 32 and an upper arm 33. A moving contact 321 is provided on the lower arm, and a stop wall 331 is provided on the upper arm. One of the pins applies a force on the outer wall of the stop wall. Taking the horizontal center plane of the shaft hole as the boundary, the upper arm extends upward, and the lower arm extends downward and is provided with a moving contact for cooperating with the static contact.

[0026] In this embodiment, as shown in the figure, a groove 332 for part of the pin to extend into is provided on the stop wall. This prevents the pin of the torsion spring from coming out and makes the use more stable.

[0027] In this embodiment, as shown in the figure, the housing is provided with the pin shaft integrally. The rotating shaft is provided with a shaft hole 211. The bracket is provided with a first rotating shaft 23 and a second rotating shaft 24. The first rotating shaft is used for installing the locking buckle 5, and the second rotating shaft is hinged and cooperated with the shaft hole. The first rotating shaft and the second rotating shaft are coaxially arranged and are respectively arranged on two end faces of the bracket. The structure is compact and convenient for processing.

[0028] In this embodiment, as shown in the figure, the bracket is provided with an arc-shaped wall 25, and at least part of the middle ring is correspondingly arranged inside the arc-shaped wall. This prevents the middle ring from coming out and makes the use more stable. Of course, other methods such as using a stop block can also be used to achieve this.

[0029] In this embodiment, as shown in the figure, the bracket is provided with a first boss 26 and a second boss 27 which are oppositely arranged. The moving contact is installed between the first boss and the second boss. The installation holes on the first boss, the second boss and the moving contact are connected by a rotating shaft. The two ends of the rotating shaft are fixed on the first boss and the second boss. At the same time, an empty slot for installing the moving contact is formed between the first boss and the second boss. The structure is compact and the moving contact is limited.

[0030] In this embodiment, as shown in the figure, in the height direction, the stop wall is arranged below the second rotating shaft. The height direction mentioned here takes Figure 3 as an example, the stop wall is higher than X1 and lower than X2.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0033] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model. The embodiments should not be regarded as a limitation to the present utility model, but any improvement made based on the spirit of the present utility model should be within the protection scope of the present utility model.

Claims

1. A circuit breaker with simplified torsion springs, comprising a housing (1), wherein a tripping mechanism is arranged in the housing, wherein the tripping mechanism comprises a bracket (2) rotatably mounted in the housing, wherein a rotatably mounted moving contact (3) is arranged on the bracket, wherein: Also includes A torsion spring (4), the torsion spring comprising a middle ring (41) and at least two pins (42), the housing being provided with a pin shaft (21) for sleeves of the middle ring, one of the pins being pressed against an inner wall of the housing, and the other of the pins being pressed against the moving contact to drive the moving contact to rotate in a direction toward the stationary contact (7). At the same time, it is used to drive the bracket to rotate in the direction of opening the gate.

2. The circuit breaker with simplified torsion spring according to claim 1, characterized in that: The moving contact comprises an axial hole (31), a lower arm (32) and an upper arm (33); the lower arm is provided with a moving contact point (321); the upper arm is provided with a retaining wall (331); and one of the pins applies force on the outer wall of the retaining wall.

3. The circuit breaker with simplified torsion spring according to claim 2, characterized in that: A groove (332) on the retaining wall for a portion of the pin to extend into.

4. The circuit breaker with simplified torsion spring according to claim 1, characterized in that: The housing is provided with an integral pin shaft, the rotating shaft is provided with an axis hole (211), the bracket is provided with a first rotating shaft (23) and a second rotating shaft (24), the first rotating shaft is used for installing the lock buckle (5), the second rotating shaft is hingedly matched with the axis hole, the first rotating shaft and the second rotating shaft are coaxially arranged and are respectively arranged on two end surfaces of the bracket.

5. The circuit breaker with simplified torsion spring according to claim 1, characterized in that: The bracket is provided with an arc-shaped wall (25), and at least part of the middle ring is correspondingly arranged on the inner side of the arc-shaped wall.

6. The circuit breaker with simplified torsion spring according to claim 1, characterized in that: The bracket is provided with a first boss (26) and a second boss (27) which are arranged opposite to each other, and the moving contact is installed between the first boss and the second boss.

7. The circuit breaker with simplified torsion spring according to claim 4, characterized in that: In the height direction, the blocking wall is arranged below the second rotating shaft.

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