CN110265272A - A kind of small type circuit breaker operating mechanism and miniature circuit breaker - Google Patents

Abstract

The present invention provides a miniature circuit breaker operating mechanism and a miniature circuit breaker, wherein the miniature circuit breaker operating mechanism includes: a moving contact, rotatably installed on a housing, having an opening position separated from the static contact, and The closing position where the static contact contacts and connects; the push button, which can be installed on the housing in a translational manner, and is connected with the moving contact in rotation, and the push button drives the moving contact to rotate toward the opening position or the closing position, so as to realize the opening and closing position. Closing action; locking structure, used to lock the push button in the closing state. Compared with the solution in the prior art that the handle needs to use a U-shaped push rod and a jumper to drive the moving contact to rotate, in the present invention, with the cooperation of the locking structure, the translational push button can directly drive the above-mentioned moving contact to realize For the opening and closing action, the push button does not need to drive the above-mentioned moving contact to rotate through the bracket assembly composed of the contact bracket, jumper, and lock. It has the advantages of simple transmission structure, fast opening and closing speed, and low production and maintenance costs.

Description

A miniature circuit breaker operating mechanism and miniature circuit breaker

technical field

The invention relates to the technical field of small circuit breakers, in particular to a small circuit breaker operating mechanism and a small circuit breaker.

Background technique

Miniature circuit breakers refer to protective appliances installed on terminal distribution lines, mainly used for overload and short circuit protection of lines and electrical equipment. Miniature circuit breakers are generally composed of operating mechanism, electromagnetic tripping mechanism, thermal tripping mechanism, arc extinguishing mechanism, etc. The operating mechanism refers to the components used to open and close the circuit breaker. The operating mechanism must not only ensure the reliable closing of the circuit breaker, but also ensure the rapid opening of the circuit breaker under fault conditions. The performance of the operating mechanism directly affects the miniature circuit breaker. function.

As shown in 8, the traditional small circuit breaker operating mechanism uses the U-shaped push rod 02 on the handle 01 to drive the bracket assembly composed of the contact bracket 03, the jumper 04, the lock 05, and the moving contact 06. Thereby, the moving contact 06 is driven to connect or disconnect with the static contact, so as to realize the opening and closing action. Realizing the linkage between the rotating handle and the moving contact 06 through the above-mentioned bracket assembly will not only affect the opening and closing speed of the circuit breaker, but also have the problems of complex transmission structure and high production and maintenance costs.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the fact that the handle of the operating mechanism in the prior art needs to drive the moving contact through a transmission member such as a bracket assembly, resulting in slow opening and closing speed of the circuit breaker, complicated transmission structure, and difficult production and maintenance. To solve the problem of high cost, a miniature circuit breaker operating mechanism and a miniature circuit breaker with the miniature circuit breaker operating mechanism are provided.

To this end, the present invention provides a small circuit breaker operating mechanism, including:

The moving contact is rotatably mounted on the housing, has an opening position separated from the static contact, and a closing position in contact with the static contact;

The push button is installed on the housing in a translational manner, and is connected to the movable contact in rotation, and the push button drives the movable contact to rotate toward the opening position or the closing position, so as to Realize opening and closing action;

The locking structure is used to lock the push button in the closed state.

As a preferred solution, the top of the moving contact is pivotally connected to the push button, a strip-shaped hole is formed in the middle, and the bottom is opposite to the static contact. The first mounting column in the bar-shaped hole is slidably arranged in the bar-shaped hole.

As a preferred solution, it further includes a first biasing member adapted to drive the push button to reset, and one end of the first biasing member abuts against the housing, and the other end of the first biasing member abuts against the push button.

As a preferred solution, the locking structure includes:

The locking piece is rotatably installed on the housing, and the first rotating arm is provided with a locking tooth that is locked with the slot of the push button, and the locking piece has a a locked position to lock the push button, and an unlocked position separated from the push button;

The second biasing member is connected at one end to the housing and at the other end to the locking member, and applies a biasing force for the locking member to rotate toward the locking position.

As a preferred solution, the contact surface between the lock teeth and the lock teeth is an inclined surface, so that the push button is driven by an external force to drive the lock teeth to separate from the lock teeth.

As a preferred solution, the housing is provided with a button opposite to the first rotating arm and adapted to drive the locking member to rotate from the locking position to the unlocking position.

As a preferred solution, it also includes a third biasing member, one end of which is connected to the housing, and the other end is connected to the moving contact, and applies a force toward the moving contact to the moving contact. The biasing force to move the brake position.

As a preferred solution, the housing is provided with a second mounting column that blocks and cooperates with the movable contact so as to limit the opening position of the movable contact near the inner wall thereof.

As a preferred solution, a chute for the reciprocating movement of the slider of the push button is formed on the housing, and the first biasing member is arranged in the chute.

The present invention provides a miniature circuit breaker, including the above-mentioned miniature circuit breaker operating mechanism.

The technical solution of the present invention has the following advantages:

1. The small circuit breaker operating mechanism provided by the present invention includes a moving contact, a push button and a locking structure. The push button can be installed on the housing in a translational manner, and is connected with the moving contact in rotation. The push button drives the moving contact toward The direction of the opening position or the closing position is rotated to realize the opening and closing action. Since the push button is directly connected with the rotation of the moving contact, the push button moves back and forth to drive the moving contact and the static contact to open and close, which is different from the existing technology. Compared with the solution that the handle needs to use a U-shaped push rod and a jumper to drive the moving contact to rotate, the push button that can translate in translation under the cooperation of the locking structure in the present invention can directly drive the above-mentioned moving contact to realize the opening and closing action. The button does not need to drive the above-mentioned movable contact to rotate through the bracket assembly composed of the contact bracket, jumper and lock. It has the advantages of simple transmission structure, fast opening and closing speed, and low production and maintenance costs.

2. In the operating mechanism of the small circuit breaker provided by the present invention, the top of the moving contact is pivotally connected with the push button, the middle part is formed with a bar-shaped hole, the bottom is opposite to the static contact, and the housing is provided with a hole extending into the bar-shaped hole. The first mounting column is slidably arranged in the bar-shaped hole. When the push button reciprocates and translates, it drives the moving contact to move up and down relative to the first mounting column and rotates around the first mounting column. The moving contact has a structure The advantage of simplicity.

3. In the small circuit breaker operating mechanism provided by the present invention, the locking structure includes: a locking member, which is rotatably installed on the housing, and the first rotating arm is provided with a locking tooth that cooperates with the locking groove of the push button. The locking member has a locking position that cooperates with the push button to lock the pushing button, and an unlocking position that is separated from the pushing button; the second biasing member is connected with the housing at one end and connected with the locking member at the other end, and is a lock The clasp exerts a biasing force that rotates toward the locked position. The inventor creatively sets the locking member to lock and cooperate with the push button. Compared with the prior art lock and jumper, the jumper is omitted, the structure is simpler, and the production and maintenance costs are low.

4. In the operating mechanism of the small circuit breaker provided by the present invention, the contact surface where the locking tooth and the locking groove cooperate with each other is an inclined surface, so that the push button is driven by external force, and the locking groove is separated from the locking tooth, that is, the pushing button can be manually driven to realize The setting of the opening and the inclined surface has the advantage of simple structure.

5. In the small circuit breaker operating mechanism provided by the present invention, the casing is provided with a button opposite to the first rotating arm, which is suitable for driving the locking member to rotate from the locking position to the unlocking position. When the button drives the locking member to rotate to When in the unlocked position, the push button drives the movable contact to move to the opening position under the action of the first biasing member, thereby realizing the opening. On the basis of manually driving the push button to realize the opening, the inventor added a push button to drive the push button. The way to realize the opening, so that the opening operation is simpler.

6. The small circuit breaker operating mechanism provided by the present invention also includes a third biasing member, one end of the third biasing member is connected to the housing, and the other end is connected to the moving contact, and the moving contact is applied to move toward the closing position. Bias force, when the switch is in the closing position, the third bias member keeps the moving contact and the static contact in contact, so that the moving contact will not be separated from the static contact due to vibration, thereby generating an arc and prolonging the life of the moving contact. Service life of contacts and static contacts.

7. In the operating mechanism of the small circuit breaker provided by the present invention, the side of the housing close to the inner wall is provided with a second installation column that is in cooperation with the movable contact to limit the opening position of the movable contact, so that the movable contact can be connected with the housing. The internal wall maintains a certain gap to prevent the high-temperature movable contact from melting the plastic shell.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is the perspective view of miniature circuit breaker of the present invention;

Fig. 2 is a structural schematic diagram of the operating mechanism of the miniature circuit breaker of the present invention in the closing state;

Fig. 3 is a structural schematic diagram of the operating mechanism of the miniature circuit breaker of the present invention in the opening state;

Fig. 4 is a perspective view after removing the housing in Fig. 2;

Figure 5 is a schematic diagram of the explosion structure of the push button and the moving contact;

Fig. 6 is a structural schematic diagram of a locking member;

Fig. 7 is a schematic diagram of an exploded structure of the push button and the housing;

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

Description of reference signs: 01, handle; 02, U-shaped push rod; 03, contact bracket; 04, jumper; 05, lock; 06, moving contact;

1. Shell; 11. First mounting column; 12. Second mounting column; 13. Slide groove; 2. Moving contact; 21. Strip hole; 22. Third biasing member; 3. Static contact; 4. Push button; 41. First biasing member; 42. Card slot; 43. Slider; 5. Locking member; 51. First rotating arm; 52. Lock teeth; 53. Second biasing member; 54 , the contact surface; 55, the second rotating arm; 6, the button; 61, the block.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to 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. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

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 there is no conflict with each other.

Example

This embodiment provides a small circuit breaker, as shown in Fig. 1, Fig. 5 and Fig. 7, which is provided with an operating mechanism, and the operating mechanism includes a moving contact 2, a push button 4, a button 6 and a locking structure.

The moving contact 2 is rotatably installed on the housing 1, and has an opening position separated from the static contact 3, and a closing position in contact with the static contact 3. The top of the moving contact 2 It is pivotally connected with the push button 4, and a bar-shaped hole 21 is formed in the middle, and the bottom is opposite to the static contact 3. The housing 1 is provided with a first mounting column extending into the bar-shaped hole 21 11. The first mounting column 11 is slidably arranged in the bar-shaped hole 21. The housing 1 is provided with a third biasing member 22 and a second mounting column 12. One end of the third biasing member 22 is connected to the housing 1, the other end is connected with the moving contact 2, and applies a biasing force for the moving contact 2 to move toward the closing position. The housing 1 is provided with a The head 2 blocks the second mounting column 12 that fits to limit the opening position of the moving contact 2 .

The push button 4 is installed on the housing 1 in a translational manner, the top of the push button 4 protrudes from the housing 1, and the bottom slider 43 is connected to the movable contact 2 in rotation. The sliding block 43 of the push button 4 reciprocates the chute 13, the first biasing member 41 is arranged in the chute 13, one end of the first biasing member 41 is against the housing 1, and the other end is against the pushing The button 4 offsets and is used to drive the push button 4 to reset.

The locking structure includes: a locking member 5 and a second biasing member 53 .

As shown in FIG. 6 , the locking member 5 is rotatably mounted on the housing 1 and has a first rotating arm 51 and a second rotating arm 55 . The locking groove 42 is matched with the locking tooth 52, and the contact surface 54 between the locking tooth 52 and the locking groove 42 is an inclined surface, so that the push button 4 is driven by an external force to drive the locking groove 42 and the locking groove 42. The locking teeth 52 are separated, and the locking member 5 has a locking position that cooperates with the push button 4 to lock the push button 4 , and an unlocking position that is separated from the push button 4 . The second rotating arm 55 of the locking member 5 is set opposite to the push rod of the electromagnetic tripping mechanism (it should be noted that the electromagnetic tripping mechanism is an existing mature technology, so its internal structure and working principle will not be described in detail). When a short circuit occurs, the push rod of the electromagnetic tripping mechanism will drive the second rotating arm 55 to rotate, thereby causing the locking member 5 to rotate from the locking position to the unlocking position, and the push button 4 is reset under the action of the first biasing member 41, Drive the moving contact 2 to separate from the static contact 3, thereby realizing the opening.

The second biasing member 53 has one end connected to the housing 1 and the other end connected to the locking member 5 , and applies a biasing force for the locking member 5 to rotate toward the locking position.

Button 6, the top protrudes from the casing 1, and the bottom is opposite to the first rotating arm 51. The side wall of the button 6 is formed with a mounting groove inserted into the casing 1, and a stopper 61 that is blocked and matched with the top wall and bottom wall of the mounting groove. , the button 6 is driven by an external force to drive the first rotating arm 51 to rotate, and then drives the locking member 5 to rotate from the locking position to the unlocking position, and the push button 4 is reset under the action of the first biasing member 41, driving The moving contact 2 is separated from the static contact 3, so as to realize opening.

In the operating mechanism of the small circuit breaker of the present invention, the push button 4 that can be moved in translation under the cooperation of the locking structure can directly drive the above-mentioned movable contact 2 to realize the opening and closing action, and the push button 4 does not need to pass through the contact bracket, jumper, and lock. The formed bracket assembly drives the above-mentioned movable contact 2 to rotate, and has the advantages of simple transmission structure, fast opening and closing speed, and low production and maintenance costs.

In this embodiment, the first biasing member 41 , the second biasing member 53 and the third biasing member 22 are springs.

As an alternative embodiment, the first mounting column 11 and the second mounting column 12 are two parallel mounting columns of a U-shaped bar inserted in the mounting groove of the housing.

As shown in Figures 2 to 4, the working principle of the miniature circuit breaker operating mechanism of the present invention is as follows:

Closing:

In the initial state, the operating mechanism is in the opening position shown in Figure 3, and the push button 4 is manually pushed to overcome the force of the first biasing member 41 to move to the right, and the push button 4 drives the moving contact 2 around the first installation column 11 Clockwise rotation, when the push button 4 moves to the closing position shown in Figure 2, the moving contact 2 contacts and communicates with the static contact 3 to realize closing. The card slot 42 cooperates and locks.

Opening:

1) Realize opening by pushing the button:

Manually push the push button 4 to move to the left, because the contact surface 54 between the lock tooth 52 and the said card slot 42 is an inclined surface, when the push button 4 moves to the left, the locking member 5 is driven to rotate counterclockwise, and the moving contact is driven. The head 2 rotates counterclockwise around the first mounting column 11, so that the moving contact 2 is separated from the static contact 3, thereby realizing opening.

2) Realize opening by button:

The button 6 is manually driven to move downward, the button 6 is offset against the first rotating arm 51, and the locking member 5 is driven to rotate counterclockwise. A biasing member 41 moves to the left, and drives the movable contact 2 to rotate counterclockwise around the first mounting column 11, so that the movable contact 2 is separated from the static contact 3, thereby realizing opening.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (10)

1. A small circuit breaker operating mechanism, characterized in that: comprising: The moving contact (2) is rotatably mounted on the housing (1), has an opening position separated from the static contact (3), and a closing position in contact with the static contact (3); The push button (4) is installed on the casing (1) in a translational manner, and is connected to the movable contact (2) in rotation, and the push button (4) drives the movable contact (2) toward The direction of the opening position or the closing position is rotated to realize the opening and closing action; The locking structure is used to lock the push button (4) in the closed state. 2. The miniature circuit breaker operating mechanism according to claim 1, characterized in that: the top of the movable contact (2) is pivotally connected to the push button (4), and a bar-shaped hole (21) is formed in the middle, The bottom is set opposite to the static contact (3), and the housing (1) is provided with a first mounting column (11) extending into the bar-shaped hole (21), and the first mounting column ( 11) Slidingly arranged in the strip hole (21). 3. The miniature circuit breaker operating mechanism according to claim 2, characterized in that it further comprises a first biasing member (41) suitable for driving the push button (4) to reset, the first biasing member ( 41) One end is against the housing (1), and the other end is against the push button (4). 4. The miniature circuit breaker operating mechanism according to claim 3, wherein the locking structure comprises: The locking member (5) is rotatably installed on the housing (1), and its first rotating arm (51) is provided with a lock that cooperates with the locking groove (42) of the push button (4) Teeth (52), the locking member (5) has a locking position that cooperates with the push button (4) to lock the push button (4), and is separated from the push button (4) unlock position; The second biasing member (53), one end is connected with the housing (1), and the other end is connected with the locking member (5), and applies a direction to the locked position for the locking member (5). Rotational bias force. 5. The operating mechanism of the miniature circuit breaker according to claim 4, characterized in that: the contact surface (54) where the locking tooth (52) and the locking groove (42) cooperate with each other is an inclined surface, so that the The push button (4) is driven by external force to drive the card slot (42) to separate from the locking tooth (52). 6. The operating mechanism of the miniature circuit breaker according to claim 4 or 5, characterized in that: the housing (1) is provided opposite to the first rotating arm (51), suitable for driving the lock Button (6) for the clasp (5) to rotate from said locked position to said unlocked position. 7. The miniature circuit breaker operating mechanism according to any one of claims 1-6, characterized in that it further comprises a third biasing member (22), one end of the third biasing member (22) is connected to the The casing (1) is connected, and the other end is connected with the moving contact (2), and applies a biasing force for the moving contact (2) to move toward the closing position. 8. The operating mechanism of the miniature circuit breaker according to claim 1, characterized in that: the side of the housing (1) close to its inner wall is provided with a blocking fit with the moving contact (2) to limit the moving contact. The second mounting post (12) for the opening position of the contact (2). 9. The miniature circuit breaker operating mechanism according to claim 3, characterized in that: the housing (1) is formed with a chute (13) for the slider (43) of the push button (4) to reciprocate ), the first biasing member (41) is arranged in the sliding groove (13). 10. A miniature circuit breaker, characterized by comprising the operating mechanism of a miniature circuit breaker according to any one of claims 1-9.