Safety lock structure for circuit breaker and circuit breaker having the same

Abstract

The present invention relates to a safety lock structure for a circuit breaker and a circuit breaker having the same. The safety lock structure of the present invention comprises: a first push rod having a first body, a first connecting portion and a first positioning portion; a second push rod having a second body, a second connecting portion and a second positioning portion; and a safety lock having a lock tongue and a driving member. The circuit breaker of the present invention comprises a housing and an operating mechanism arranged in the housing, and the operating mechanism is connected to the above-mentioned safety lock structure. The safety lock structure for a circuit breaker of the present invention and the circuit breaker having the same can be compatible with the original OFF button function while also adding a locking function of the OFF state, making the user operation more flexible and reliable.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage circuit breakers, and in particular to a safety lock structure for circuit breakers. Background Art

[0002] In the low-voltage electrical field, frame-type circuit breakers are a common mechanical switching device that can connect, carry and disconnect currents under normal circuit conditions, and can also connect, carry for a certain time and disconnect currents under specified abnormal circuit conditions.

[0003] As we all know, circuit breakers are equipped with two buttons, ON and OFF, on their housing. Pressing the ON button closes the circuit breaker, while pressing the OFF button opens it. To improve operational reliability and ensure the safety of maintenance personnel, circuit breakers are often equipped with a safety lock. Specifically, installing a safety lock on the OFF button can provide a locking function for the circuit breaker. When the OFF button is locked, the circuit breaker cannot be closed, ensuring safe operation.

[0004] However, installing a safety lock in the prior art requires first removing the circuit breaker's OFF button, then installing the safety lock in its original position. Consequently, even when the circuit breaker is not in the OFF lock position, the safety lock is the only way to open the circuit breaker. This approach is inconvenient, unpleasant, and expensive to manufacture.

[0005] In order to solve the above technical problems, those skilled in the art are in urgent need of developing a new type of safety lock structure for circuit breakers. Summary of the Invention

[0006] The object of the present invention is to provide a safety lock structure for a circuit breaker, which is compatible with the original OFF button function while adding an OFF state locking function, making the operation more flexible and reliable.

[0007] The safety lock structure for a circuit breaker of the energy storage motor of the present invention is connected to the operating mechanism of the circuit breaker. The safety lock structure includes: a first push rod, one end of which is connected to the operating rod of the operating mechanism, the first push rod having: a first body; a first connecting portion, which extends vertically outward along one side of the first body; and a first positioning portion, which is connected to a side plate of the operating mechanism of the circuit breaker; a second push rod, which has: a second body, which is arranged parallel to the first body and maintains a predetermined interval; a second connecting portion, which extends vertically outward along one side of the second body in a direction close to the first body, the first connecting portion is rotatably connected to the second connecting portion; and a second positioning portion, which is connected to the other side of the operating mechanism of the circuit breaker. a side panel; and a safety lock, which is installed on the housing of the circuit breaker and has: a lock tongue and a driving member, the lock tongue can abut against the second connecting part; wherein, when the driving member is switched to the unlocked state, the lock tongue is disengaged from the abutment with the second connecting part, and the OFF button located on the housing applies a driving force to the first connecting part, and the first connecting part can be rotated relative to the second connecting part, thereby driving the operating lever to move, so that the circuit breaker is in the open state; when the driving member is switched to the locked state, the lock tongue abuts against the second connecting part, and the position of the first connecting part is locked, so that the circuit breaker is locked in the open state.

[0008] According to one aspect of the present invention, the first connecting portion is a columnar connecting rod, and the second connecting portion is formed with a receiving chamber for receiving the columnar connecting rod.

[0009] According to another aspect of the present invention, the outer contour of the connecting rod partially covers the interior of the accommodating chamber, and in the unlocked state, the connecting rod can achieve relative rotation inside the accommodating chamber.

[0010] According to another aspect of the present invention, the second connecting portion is an arc-shaped plate structure with a predetermined curvature, and the accommodating chamber formed by the curvature is adapted to the outer contour of the connecting rod.

[0011] According to another aspect of the present invention, the first positioning portion comprises: a first positioning protrusion with a first mounting groove formed thereon; a first rotating shaft which can be passed through and connected to the first mounting groove; and a first resetting component.

[0012] According to another aspect of the present invention, one end of the first rotating shaft is connected to the one side plate, and the other end thereof penetrates the first mounting groove and is mounted to the first positioning protrusion.

[0013] According to another aspect of the present invention, the first reset assembly includes a torsion spring. The torsion spring is sleeved on the outer periphery of the first positioning protrusion, and one end of the torsion spring is connected to the one side plate.

[0014] According to another aspect of the present invention, the first reset assembly further includes a retaining spring, which is disposed on the other end of the first rotating shaft away from the one side plate.

[0015] According to one aspect of the present invention, the second positioning portion comprises: a second positioning protrusion with a second mounting slot formed thereon; a second rotating shaft which can be passed through and connected to the second mounting slot; and a second reset assembly.

[0016] According to another aspect of the present invention, one end of the second rotating shaft is connected to the other side plate, and the other end thereof penetrates the second mounting groove and is mounted on the second positioning protrusion.

[0017] According to another aspect of the present invention, the second reset assembly includes a torsion spring. The torsion spring is sleeved on the outer periphery of the second positioning protrusion, and one end of the torsion spring is connected to the other side plate.

[0018] According to another aspect of the present invention, the second reset assembly further includes a retaining spring, which is disposed on the other end of the second rotating shaft away from the other side plate.

[0019] According to another aspect of the present invention, the locking tongue may be vertically abutted against the outer wall of the plate-like structure, and the pressing end of the OFF button may be vertically abutted against the outer wall of the connecting rod.

[0020] According to another aspect of the present invention, the operating mechanism is further connected to the safety lock structure having the above-mentioned structure and features and a combination thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 A schematic diagram of a partial structure of a circuit breaker with a safety lock structure according to an embodiment of the present invention;

[0023] Figure 2 It is from Figure 1 A schematic diagram of the partial structure of a circuit breaker with a safety lock structure is observed from another angle;

[0024] Figure 3 This is a schematic diagram of the structural decomposition of a safety lock structure for a circuit breaker according to an embodiment of the present invention;

[0025] Figure 4 for Figure 1An enlarged view of part A shows the positions and connections of the components when the safety lock is unlocked and the OFF button is not actuated.

[0026] Figure 5 for Figure 1 An enlarged view of part A shows the position and connection relationship of each component when the safety lock is unlocked and driven by the OFF button;

[0027] Figure 6 for Figure 1 An enlarged view of part A of FIG, which shows the safety lock in the unlocked state and the second push rod in the unlocked position;

[0028] Figure 7 for Figure 1 An enlarged view of part A of the safety lock is shown, which shows that the safety lock is in the locked state, with the second push rod and the first push rod both in the locked position.

[0029] Description of labels

[0030] Safety lock structure 100 first positioning protrusion 41

[0031] OFF button 101 First mounting slot 410

[0032] Pressing end 101a First rotating shaft 42

[0033] ON button 102 torsion spring 43 / 83

[0034] Operating mechanism 200 circlip 44 / 84

[0035] Operating rod 201 Second push rod 50

[0036] Side plate 202 Second body 60

[0037] The other side plate 203 second connection portion 70

[0038] First push rod 10 accommodating chamber 71

[0039] First body 20 Second positioning portion 80

[0040] First connecting portion 30 Second positioning protrusion 81

[0041] First positioning portion 40 Second rotating shaft 82

[0042] Safety lock 90 Lock tongue 93

[0043] Lock housing 91 Drive member 94

[0044] Lock body 92 DETAILED DESCRIPTION

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0046] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0047] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled.

[0048] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the positional relationship between related parts, rather than to limit their absolute positions.

[0049] In this article, "first", "second", etc. are only used to distinguish each other, rather than to indicate their importance or order.

[0050] In this article, “parallel”, “perpendicular”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0051] See Figure 1 and Figure 2 , which shows a circuit breaker with a safety lock structure 100 according to an embodiment of the present invention. The safety lock structure 100 is connected to the operating mechanism 200 of the circuit breaker. Although the figure only shows a portion of the circuit breaker structure to highlight the key technical content of the present invention, those skilled in the art will understand that by controlling the ON button 102 and the OFF button 101 provided on the housing, the circuit breaker circuit can be turned on and off respectively. The technical solution of the present invention can simultaneously retain the function of the OFF button 101 and the function of the safety lock in the OFF state, making user operation more convenient and reliable compared to the existing technology.

[0052] Specifically, the safety lock structure according to one embodiment of the present invention includes: a first push rod 10, a second push rod 50, and a safety lock 90. Because one end of the first push rod 10 is connected to the operating rod 201 of the operating mechanism 200, actuating the first push rod 10 can cause the operating rod 201 to rotate, thereby opening the circuit breaker.

[0053] Combine Figure 3As shown, the first push rod according to the present invention comprises a first body 20, a first connecting portion 30, and a first positioning portion 40. The first connecting portion 30 extends vertically outward along one side of the first body 20. The first positioning portion 40 is connected to a side plate 202 of the operating mechanism 200 of the circuit breaker.

[0054] Meanwhile, the second push rod 50 has a second body 60, a second connecting portion 70, and a second positioning portion 80. The second body 60 and the first body 20 are arranged parallel to each other, with a predetermined distance between them. The second connecting portion 70 extends vertically outward along one side of the second body 60, toward the first body 20. The first connecting portion 30 is rotatably connected to the second connecting portion 70. The second positioning portion 80 is connected to the other side plate 203 of the circuit breaker operating mechanism 200.

[0055] Furthermore, the safety lock 90 is mounted on the housing of the circuit breaker. Specifically, the safety lock 90 has a lock tongue 93 and a drive member 94. The lock tongue 93 can abut against the second connecting portion 70. Figure 3 It can be seen that it is more preferred that the safety lock 90 further comprises a lock housing 91 and a lock body 92. The lock body 92 is installed inside the lock housing 91, and the lock tongue 93 and the driving member 94 are connected to both ends of the lock body 92 respectively.

[0056] It is worth pointing out that, combined with Figure 4 and Figure 5 As shown, when the driving member 94 is switched to the unlocked state, the locking tongue 93 disengages from the abutment with the second connecting part 70, and the OFF button 101 located on the housing applies a driving force to the first connecting part 30, and the first connecting part 30 can rotate relative to the second connecting part 70. The first connecting part 30 drives the first push rod 10 to move, and the first push rod 10 then drives the operating rod 201 to move, so that the circuit breaker is in the open state.

[0057] Combine Figure 6 and Figure 7 As shown, when the driving member 94 is switched to the locked state, the locking tongue 93 abuts against the second connecting portion 70, and the second connecting portion 70 is pushed from an active position to a locked position. Due to the linkage relationship between the first connecting portion 30 and the second connecting portion 70, the position of the first connecting portion 30 is locked at this time, and the first push rod 10 and the operating rod 201 cannot move, which causes the circuit breaker to be locked in the open state.

[0058] As an optional embodiment, Figure 3 The first connecting part 30 is a columnar connecting rod, and the second connecting part 70 is formed with a accommodating chamber 71, which is used to accommodate the columnar connecting rod. When in the unlocked state, a part of the columnar connecting rod can rotate inside the accommodating chamber 71, thereby driving the first push rod 10 to move, and then driving the operating rod 201 to realize the disconnecting operation.

[0059] Preferably, to achieve a better clamping effect, the outer contour of the connecting rod partially covers the interior of the accommodating chamber 71. In the unlocked state, the connecting rod can achieve relative rotation within the accommodating chamber 71. When the driving member 94 switches to the locked state, the outer wall of the second connecting portion 70 is subjected to a force through the locking tongue 93, causing a certain positional displacement, that is, moving from the active position to a locked position. At this time, the displacement of the accommodating chamber 71 causes the connecting rod to become stuck and unable to rotate, thereby achieving a locking effect.

[0060] like Figure 3 As shown, as a preferred embodiment, the second connecting portion 70 is an arc-shaped plate structure with a predetermined curvature, and the accommodating chamber formed by the curvature is adapted to the outer contour of the connecting rod.

[0061] As an exemplary embodiment, the first positioning portion 40 includes a first positioning protrusion 41, a first rotating shaft 42, and a first reset assembly. The first positioning protrusion 41 defines a first mounting slot 410. The first rotating shaft 42 can be inserted into and connected to the first mounting slot 410.

[0062] Specifically, in order to achieve connection with the operating mechanism, one end of the first rotating shaft 42 is connected to one side plate 202 of the operating mechanism, and the other end of the first rotating shaft 42 penetrates the first mounting groove 410 and is mounted to the first positioning protrusion 41 .

[0063] In order to better achieve the effect of self-reset of the first push rod 10 after rotation, the first reset assembly includes a torsion spring 43 . The torsion spring 43 is sleeved on the outer periphery of the first positioning protrusion 41 , and one end of the torsion spring 43 is connected to the one side plate 202 .

[0064] Preferably, the first reset assembly further includes a retaining spring 44, which is clamped at the other end of the first rotating shaft 42 away from the one side plate 202 to perform an axial clamping and fixing function to prevent the first rotating shaft 42 from falling off from the first mounting groove 410 during rotation.

[0065] Similarly, as an exemplary embodiment, the second positioning portion 80 includes a second positioning protrusion 81, a second rotating shaft 82, and a second reset assembly. The second positioning protrusion 81 is provided with a second mounting slot. The second rotating shaft 82 can be passed through and connected to the second mounting slot.

[0066] Specifically, in order to achieve coupling with the operating mechanism, one end of the second rotating shaft 82 is connected to the other side plate 203 of the operating mechanism, and the other end of the second rotating shaft 82 penetrates the second mounting groove and is mounted to the second positioning protrusion 81 .

[0067] In order to better achieve the effect of self-reset of the first push rod 10 after rotation, the second reset assembly includes a torsion spring 83 . The torsion spring 83 is sleeved on the outer periphery of the second positioning protrusion 81 , and one end of the torsion spring 83 is connected to the other side plate 203 .

[0068] Preferably, the second reset assembly further includes a retaining spring 84, which is clamped at the other end of the second rotating shaft 82 away from the other side plate 203 to perform an axial clamping and fixing function to prevent the first rotating shaft 42 from falling off from the first mounting groove during rotation.

[0069] In a preferred embodiment, when the driver 94 is rotated to the locked position, the locking tongue 93 abuts perpendicularly against the outer wall of the plate-like structure. When the OFF button 101 is pressed, the pressing end 101a of the OFF button 101 abuts perpendicularly against the outer wall of the connecting rod. Specifically, the driver 94 can be an external key.

[0070] At the same time, the present invention also discloses a circuit breaker, which includes a housing and an operating mechanism disposed inside the housing, wherein the operating mechanism is further connected to a safety lock structure 100 having the above-mentioned structure and features.

[0071] According to the above-mentioned design scheme of the present invention, when the safety lock 90 is in the unlocked state, the first push rod 10 can rotate in the accommodating chamber 71 of the second push rod 50, and when the safety lock 90 is switched to the locked state, the second push rod 50 will lock the first push rod 10 in the open position and cannot rotate. At this time, the circuit breaker is locked in the open state.

[0072] In summary, by adopting the safety lock structure of the present invention, the circuit breaker can retain the functions of the OFF button and the OFF button safety lock at the same time, so that users have more choices when using it, and the cost of this safety lock is lower.

[0073] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0074] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present invention, such as the combination, division or repetition of features, should be included in the scope of protection of the present invention.

Claims

1. A safety lock structure (100) for a circuit breaker, connected to an operating mechanism (200) of the circuit breaker, characterized in that: The safety lock structure includes: A first push rod (10), one end of which is connected to the operating rod (201) of the operating mechanism (200), wherein the first push rod (10) has: a first body (20); a first connecting portion (30) extending vertically outward along one side of the first body (20); and a first positioning portion (40) connected to a side plate (202) of the operating mechanism (200) of the circuit breaker; A second push rod (50) having: a second body (60) arranged parallel to the first body (20) and maintaining a predetermined interval; a second connecting portion (70) extending vertically outward along one side of the second body (60) in a direction close to the first body (20), the first connecting portion (30) being rotatably connected to the second connecting portion (70); and a second positioning portion (80) connected to another side plate (203) of the operating mechanism (200) of the circuit breaker; and A safety lock (90) is mounted on the housing of the circuit breaker and has: A locking tongue (93) and a driving member (94), wherein the locking tongue (93) can abut against the second connecting portion (70); wherein, When the driving member (94) is switched to the unlocked state, the locking tongue (93) is disengaged from the abutment with the second connecting portion (70), and the OFF button (101) located on the housing applies a driving force to the first connecting portion (30), so that the first connecting portion (30) can be rotated relative to the second connecting portion (70), thereby driving the operating lever (201) to operate, so that the circuit breaker is in the open state; When the driving member (94) switches to the locked state, the locking tongue (93) abuts against the second connecting portion (70), and the position of the first connecting portion (30) is locked, so that the circuit breaker is locked in the open state.

2. The safety lock structure for a circuit breaker according to claim 1, wherein: The first connecting portion (30) is a columnar connecting rod, and the second connecting portion (70) is formed with a receiving chamber (71) for receiving the columnar connecting rod.

3. The safety lock structure for a circuit breaker according to claim 2, characterized in that: The outer contour of the connecting rod partially covers the interior of the accommodating chamber (71), and in the unlocked state, the connecting rod can achieve relative rotation inside the accommodating chamber (71).

4. The safety lock structure for a circuit breaker according to claim 2, wherein: The second connecting portion (70) is an arc-shaped plate-like structure with a predetermined curvature, and the accommodating chamber (71) formed by the curvature is adapted to the outer contour of the connecting rod.

5. The safety lock structure for a circuit breaker according to claim 1, wherein: The first positioning portion (40) has: A first positioning protrusion (41) is provided with a first mounting groove (410) a first rotating shaft (42) which can be passed through and connected to the first mounting slot (410); and A first reset component.

6. The safety lock structure for a circuit breaker according to claim 5, characterized in that: One end of the first rotating shaft (42) is connected to the one side plate (202), and the other end penetrates the first mounting groove (410) and is mounted on the first positioning protrusion (41).

7. The safety lock structure for a circuit breaker according to claim 5, wherein: The first reset assembly comprises a torsion spring (43), which is sleeved on the outer periphery of the first positioning protrusion (41), and one end of which is connected to the side plate (202).

8. The safety lock structure for a circuit breaker according to claim 5, wherein: The first reset assembly further includes a retaining spring (44), the retaining spring (44) being secured to the other end of the first rotating shaft (42) away from the one side plate (202).

9. The safety lock structure for a circuit breaker according to claim 1, wherein: The second positioning portion (80) has: a second positioning protrusion (81) having a second mounting groove formed thereon; a second rotating shaft (82) which can be passed through and connected to the second mounting slot; and A second reset assembly.

10. The safety lock structure for a circuit breaker according to claim 9, wherein: One end of the second rotating shaft (82) is connected to the other side plate (203), and the other end penetrates the second mounting groove and is mounted on the second positioning protrusion (81).

11. The safety lock structure for a circuit breaker according to claim 9, wherein: The second reset assembly comprises a torsion spring (83), which is sleeved on the outer periphery of the second positioning protrusion (81), and one end of which is connected to the other side plate (203).

12. The safety lock structure for a circuit breaker according to claim 9, wherein: The second reset assembly further includes a retaining spring (84), which is secured to the other end of the second rotating shaft (82) away from the other side plate (203).

13. The safety lock structure for a circuit breaker according to claim 4, wherein: The locking tongue (93) can vertically abut against the outer wall of the plate-like structure, and the pressing end (101a) of the OFF button (101) can vertically abut against the outer wall of the connecting rod.

14. A circuit breaker comprising a housing and an operating mechanism disposed inside the housing, characterized in that: The operating mechanism is also connected to a safety lock structure (100) according to any one of claims 1 to 13.

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