A circuit breaker

Abstract

The utility model belongs to low voltage electrical apparatus technical field discloses a circuit breaker, and the circuit breaker includes casing, movable contact structure and static contact, is equipped with on-off indication window and life indication window on the casing, the movable contact structure is rotationally arranged in the casing, is equipped with on-off mark and life mark on the movable contact structure, the static contact is arranged in the casing. The circuit breaker provided by the utility model, when the movable contact structure rotates to the closing position, the movable contact structure is in abutment with the static contact, the on-off mark is exposed to the on-off indication window, the life mark is exposed to the life indication window, and the on-off and life of the circuit breaker are identified separately, which is more conducive to the user to identify the on-off state and life state of the circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. The opening and closing of a circuit breaker can cause burn-out of its moving and stationary contacts.

[0003] In related technologies, it is difficult to observe the burn-out of the moving and stationary contacts from outside the circuit breaker housing. If the circuit breaker is not replaced in time due to severe burn-out of the moving and stationary contacts, it may affect the normal use of the circuit breaker and cause serious safety problems. Utility Model Content

[0004] The purpose of this invention is to provide a circuit breaker that allows for easy determination of the degree of contact burn-out.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A circuit breaker is provided, comprising:

[0007] A housing, wherein the housing is provided with an on / off indicator window and a lifespan indicator window;

[0008] A movable contact structure is rotatably disposed within the housing, and the movable contact structure is provided with an on / off mark and a life mark;

[0009] A stationary contact is located inside the housing;

[0010] When the moving contact structure rotates to the closed position, the moving contact structure abuts against the stationary contact, the on / off mark is exposed in the on / off indicator window, and the life mark is exposed in the life indicator window.

[0011] Optionally, the movable contact structure includes a contact support, a lever, and a first elastic member disposed between the contact support and the lever. The contact support is provided with a shielding portion, the lever is provided with a marking portion, and the marking portion is provided with the life mark.

[0012] When the moving contact structure rotates to the closed position, a gap is formed between the marking part and the shell wall of the housing where the life indicator window is provided, and the first elastic member makes the blocking part tend to insert into the gap.

[0013] Optionally, both the lever and the contact support are rotatably disposed within the housing, and the life mark includes a plurality of scale lines spaced apart along the rotation direction of the contact support.

[0014] Optionally, the first elastic element is a torsion spring.

[0015] Optionally, both the lever and the contact support are rotatably disposed within the housing, and the rotation axis of the contact support coincides with the rotation axis of the lever.

[0016] Optionally, the lever includes a lever body, the lever body having the marking portion protruding therefrom, and a reinforcing rib provided between the marking portion and the lever body.

[0017] Optionally, the reinforcing rib is located on the side of the marking portion facing the life indicator window.

[0018] Optionally, the contact support includes a support body, on which the blocking portion protrudes, and a clearance groove is formed between the blocking portion and the support body to accommodate the marking portion.

[0019] Optionally, the lever has an arc surface on the side facing the on / off indicator window, and the on / off mark is provided on the arc surface.

[0020] Optionally, the on / off markings include a closing marking and an opening marking;

[0021] When the moving contact structure rotates to the closed position, the closed mark is exposed in the on / off indicator window;

[0022] When the moving contact structure rotates to the open position, the open mark is exposed in the on / off indicator window.

[0023] Beneficial effects: The circuit breaker provided by this utility model has its on / off mark exposed in the on / off indicator window and its lifespan mark exposed in the lifespan indicator window when the moving contact structure is rotated to the closed position. That is, the on / off status and lifespan of the circuit breaker are identified separately, which is more conducive to users identifying the on / off status and lifespan status of the circuit breaker. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circuit breaker provided by this utility model when it is closed;

[0025] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker provided by this utility model when it is closed;

[0026] Figure 3 This is a partial structural diagram of the circuit breaker with burnt moving and stationary contacts provided by this utility model when it is closed.

[0027] Figure 4 This is a schematic diagram of the moving contact structure provided by this utility model when the circuit breaker is closed without the moving and stationary contacts being burned out;

[0028] Figure 5This is a schematic diagram of the lever structure provided by this utility model;

[0029] Figure 6 This is a schematic diagram of the contact support structure provided by this utility model.

[0030] In the picture:

[0031] 100. Housing; 101. On / off indicator window; 102. Life indicator window;

[0032] 200. Moving contact structure; 201. On / off mark; 2011. Closing mark; 2012. Opening mark; 202. Life mark; 2021. Scale line; 203. Gap; 210. Moving contact; 220. Contact support; 221. Shielding part; 2211. First plate part; 2212. Second plate part; 222. Support body; 223. Clearance groove; 224. Mounting groove; 225. Positioning post; 230. Lever; 231. Marking part; 232. Lever body; 233. Reinforcing rib; 234. Arc surface; 240. First elastic element;

[0033] 300. Stationary contact;

[0034] 400. Operating handle;

[0035] 500, pivot. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Reference Figures 1 to 6 As shown, this embodiment provides a circuit breaker, which includes a housing 100, a moving contact structure 200, and a stationary contact 300. The housing 100 has an on / off indicator window 101 and a lifespan indicator window 102. The moving contact structure 200 is rotatably disposed within the housing 100 and has an on / off mark 201 and a lifespan mark 202. The stationary contact 300 is disposed within the housing 100. When the moving contact structure 200 rotates to the closed position, it abuts against the stationary contact 300, exposing the on / off mark 201 in the on / off indicator window 101 and the lifespan mark 202 in the lifespan indicator window 102.

[0041] It is understood that the moving contact structure 200 includes a moving contact 210, which abuts against the stationary contact 300 when the moving contact structure 200 rotates to the closed position.

[0042] It is understandable that whenever the circuit breaker is opened or closed, both the moving contact structure 200 and the stationary contact 300 will burn out. For example, both the stationary contact 300 and the moving contact 210 of the moving contact structure 200 will burn out.

[0043] Understandably, burnt-out of the moving contact structure 200 and the stationary contact 300 will at least alter the shape of the moving contact structure 200 when it is rotated to the closed position, reducing the proportion of the lifespan marker 202 exposed to the lifespan indication window 102 when the moving contact structure 200 is rotated to the closed position. Understandably, the degree of burnt-out of the moving contact structure 200 and the stationary contact 300 can be inferred from the proportion of the lifespan marker 202 exposed to the lifespan indication window 102 when the moving contact structure 200 is rotated to the closed position. When the proportion of the lifespan marker 202 exposed to the lifespan indication window 102 when the moving contact structure 200 is rotated to the closed position decreases to a threshold value, that is, when the degree of burnt-out of the moving contact structure 200 and the stationary contact 300 reaches the maximum allowable value, it indicates that the circuit breaker needs to be replaced, ensuring safety and reliability.

[0044] In this embodiment, when the moving contact structure 200 rotates to the closed position, the on / off mark 201 is exposed to the on / off indicator window 101, and the life mark 202 is exposed to the life indicator window 102. That is, the on / off status and lifespan of the circuit breaker are identified separately, which is more conducive to the user identifying the on / off status and lifespan status of the circuit breaker.

[0045] It is understandable that the circuit breaker also includes an operating handle 400. Rotating the operating handle 400 can drive the moving contact structure 200 to rotate and switch between the open and closed positions, thereby realizing the opening and closing of the circuit breaker.

[0046] In one feasible implementation, the life marker 202 includes a plurality of scale lines 2021 spaced apart along the rotation direction of the contact support 220. By observing the number of scale lines 2021 exposed within the life indicator window 102, it is more helpful to estimate the degree of burn-out of the moving contact structure 200 and the stationary contact 300. For example, when the number of scale lines 2021 exposed within the life indicator window 102 is one, the degree of burn-out of the moving contact structure 200 and the stationary contact 300 has reached the maximum allowable value, at which point the circuit breaker needs to be replaced. The scale lines 2021 can be configured as transverse grooves on the marking portion 231.

[0047] In this embodiment, reference is made to Figure 4 As shown, the on / off indicator 201 includes a closing indicator 2011 and an opening indicator 2012. When the moving contact structure 200 rotates to the closing position, the closing indicator 2011 is exposed in the on / off indicator window 101. When the moving contact structure 200 rotates to the opening position, the opening indicator 2012 is exposed in the on / off indicator window 101, which facilitates the identification of the on / off status of the circuit breaker.

[0048] For example, the on / off indicator 201 can be set to English, Chinese characters, or color. For example, the open indicator 2012 is set to green, and the closed indicator 2011 is set to red. As another example, the open indicator 2012 is set to the English word "OFF", and the closed indicator 2011 is set to the English word "ON".

[0049] In this embodiment, reference is made to Figure 2 , Figure 4 and Figure 5 As shown, the moving contact structure 200 includes a contact support 220, a lever 230, and a first elastic member 240 disposed between the contact support 220 and the lever 230. The contact support 220 has a blocking portion 221, and the lever 230 has a marking portion 231 with a lifespan mark 202. When the moving contact structure 200 rotates to the closed position, a gap 203 is formed between the marking portion 231 and the shell wall of the housing 100 with the lifespan indicator window 102. The first elastic member 240 causes the blocking portion 221 to tend to insert into the gap 203. The moving contact 210 is disposed on the contact support 220. In this embodiment, as the moving contact 210 and the stationary contact 300 burn out, when the moving contact structure 200 rotates from the open position to the closed position, the angle of rotation of the contact support 220 will increase under the action of the first elastic member 240. This will cause the depth of the blocking part 221 inserted into the gap 203 when the moving contact structure 200 rotates to the closed position to gradually increase. In other words, the blocking area of ​​the blocking part 221 on the life mark 202 gradually increases when the moving contact structure 200 rotates to the closed position, that is, the proportion of the life mark 202 exposed to the life indicator window 102 when the moving contact structure 200 rotates to the closed position gradually decreases.

[0050] Exemplarily, both the lever 230 and the contact support 220 are rotatably disposed within the housing 100. In one feasible embodiment, the rotation axis of the contact support 220 coincides with the rotation axis of the lever 230, which facilitates the shielding of the life mark 202 by the shielding part 221 and makes the moving contact structure 200 more compact. Exemplarily, the circuit breaker also includes a rotating shaft 500, through which both the lever 230 and the contact support 220 are rotatably disposed within the housing 100, facilitating assembly and resulting in a compact structure.

[0051] For example, the marking portion 231 is fan-shaped.

[0052] For example, the first elastic element 240 causes the contact support 220 and the lever 230 to have a tendency to rotate relative to each other, and the rotational tendencies of the two are opposite.

[0053] For example, the first elastic element 240 is a torsion spring, which facilitates the assembly of the moving contact structure 200 and helps to improve the compactness of the moving contact structure 200. For example, a mounting groove 224 is provided on one side of the contact support 220, and a positioning post 225 is protruding from the bottom of the mounting groove 224. The spring body of the torsion spring is disposed in the mounting groove 224 and sleeved on the positioning post 225. One of the two torsion arms of the torsion spring protrudes out of the mounting groove 224 and abuts against the contact support 220, and the other protrudes out of the mounting groove 224 and abuts against the lever 230.

[0054] In this embodiment, reference is made to Figures 2 to 5 As shown, the contact support 220 includes a support body 222, on which a blocking portion 221 protrudes, and a clearance groove 223 is formed between the blocking portion 221 and the support body 222, consisting of a clearance mark portion 231. It is understood that when the moving contact structure 200 rotates to the closed position, and the moving contact 210 and the stationary contact 300 burn out, at least a portion of the mark portion 231 inserts into the clearance groove 223, effectively preventing position interference and improving the compactness of the moving contact structure 200.

[0055] For example, the shielding portion 221 includes a first plate portion 2211 and a second plate portion 2212. The first plate portion 2211 is connected to the support body 222, and the second plate portion 2212 is used to shield the life mark 202. The second plate portion 2212 can be fan-shaped, which helps to improve the compactness of the movable contact structure 200. The center of the fan-shaped second plate portion 2212 coincides with the rotation axis of the lever 230.

[0056] For example, the mounting slot 224 is provided on the support body 222.

[0057] In one feasible implementation, the lever 230 has an arc surface 234 on the side facing the on / off indicator window 101, and an on / off mark 201 is provided on the arc surface 234. It is understood that the center of the arc surface 234 coincides with the rotation axis of the lever 230, that is, the distance between the arc surface 234 and the on / off indicator window 101 remains unchanged, which is beneficial for identifying the on / off mark 201 through the on / off indicator window 101.

[0058] In this embodiment, reference is made to Figure 2 and Figure 6 As shown, the lever 230 includes a lever body 232, on which a marking portion 231 protrudes. The marking portion 231 protrudes from the lever body 232, which helps the lever 230 to make way for the contact support 220 and improves the compactness of the moving contact structure 200.

[0059] For example, a reinforcing rib 233 is provided between the marking part 231 and the lever body 232 to reduce the risk of the marking part 231 breaking.

[0060] For example, the reinforcing rib 233 is provided on the side of the marking portion 231 facing the life indicator window 102, which facilitates the clearance of the reinforcing rib 233 for the contact support 220 and improves the compactness of the moving contact structure 200. Of course, the reinforcing rib 233 can also be provided on the side of the marking portion 231 facing away from the life indicator window 102.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A circuit breaker, characterized in that, include: A housing (100) is provided with an on / off indicator window (101) and a life indicator window (102); A movable contact structure (200) is rotatably disposed within the housing (100), and the movable contact structure (200) is provided with an on / off mark (201) and a life mark (202); A stationary contact (300) is disposed within the housing (100); When the moving contact structure (200) rotates to the closed position, the moving contact structure (200) abuts against the stationary contact (300), the on / off mark (201) is exposed in the on / off indicator window (101), and the life mark (202) is exposed in the life indicator window (102).

2. The circuit breaker according to claim 1, characterized in that, The movable contact structure (200) includes a contact support (220), a lever (230), and a first elastic member (240) disposed between the contact support (220) and the lever (230). The contact support (220) is provided with a blocking part (221), the lever (230) is provided with a marking part (231), and the marking part (231) is provided with the life mark (202). When the moving contact structure (200) is rotated to the closed position, a gap (203) is formed between the marking part (231) and the shell wall of the housing (100) where the life indicator window (102) is provided, and the first elastic member (240) makes the blocking part (221) tend to insert into the gap (203).

3. The circuit breaker according to claim 2, characterized in that, Both the lever (230) and the contact support (220) are rotatably disposed within the housing (100), and the life mark (202) includes a plurality of scale lines (2021) spaced apart along the rotation direction of the contact support (220).

4. The circuit breaker according to claim 2, characterized in that, The first elastic element (240) is a torsion spring.

5. The circuit breaker according to claim 2, characterized in that, Both the lever (230) and the contact support (220) are rotatably disposed within the housing (100), and the rotation axis of the contact support (220) coincides with the rotation axis of the lever (230).

6. The circuit breaker according to claim 2, characterized in that, The lever (230) includes a lever body (232), on which the marking part (231) is protruding, and a reinforcing rib (233) is provided between the marking part (231) and the lever body (232).

7. The circuit breaker according to claim 6, characterized in that, The reinforcing rib (233) is located on the side of the marking part (231) facing the life indicator window (102).

8. The circuit breaker according to claim 2, characterized in that, The contact support (220) includes a support body (222), on which the blocking portion (221) protrudes, and a clearance groove (223) is formed between the blocking portion (221) and the support body (222) to accommodate the marking portion (231).

9. The circuit breaker according to claim 2, characterized in that, The lever (230) has an arc surface (234) on the side facing the on / off indicator window (101), and the on / off mark (201) is provided on the arc surface (234).

10. The circuit breaker according to claim 1, characterized in that, The on / off indicator (201) includes a closing indicator (2011) and a closing indicator (2012); When the moving contact structure (200) rotates to the closed position, the closed mark (2011) is exposed in the on / off indicator window (101); When the moving contact structure (200) is rotated to the open position, the open mark (2012) is exposed to the on / off indicator window (101).

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