Lock catch for adding anti-adhesion dust full protection to miniature circuit breaker
By installing a dustproof box and filler on the locking and tripping surfaces of the miniature circuit breaker, the problem of dust accumulation and adhesion is solved, ensuring the normal operation and electrical safety of the circuit breaker and achieving a highly efficient dustproof effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-24
AI Technical Summary
In existing miniature circuit breakers, dust tends to accumulate at the engagement point of the latch and trip latch, causing sticking, which affects the normal switching operation of the circuit breaker and increases safety hazards.
A dustproof mechanism is designed, including a dustproof box and a filler. The dustproof box covers the engagement surfaces of the latch and the snap fastener. The filler consists of a spring and an insulating plug, used to fill the gap when the latch and the snap fastener separate, preventing dust from entering.
It effectively prevents the lock from sticking due to dust accumulation, ensuring the normal operation of the circuit breaker and improving electrical safety performance. The dust box and filler are made of insulating material to ensure that they do not conduct electricity under high voltage and high current conditions, thus avoiding circuit failure.
Smart Images
Figure CN224036306U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electrical safety equipment, specifically relates to a lock catch of small circuit breaker increases dust full protection of anti -adhesion. BACKGROUND
[0002] In the existing small circuit breaker, the on-off of power supply is realized through the cooperation of lock catch and jump catch. However, in the use process, dust is easy to accumulate in the circuit breaker, especially in the occlusion position of lock catch and jump catch, the accumulation of dust can cause the adhesion between lock catch and jump catch, thereby affecting the normal on-off operation of circuit breaker, in addition, dust can also cause circuit short circuit, increase the security risk. SUMMARY
[0003] In view of the above problems, the lock catch of small circuit breaker increases dust full protection of anti -adhesion provided by the application, which effectively prevents the adhesion phenomenon caused by dust accumulation.
[0004] The technical scheme of the application is as follows: a lock catch of small circuit breaker increases dust full protection of anti -adhesion, a dustproof mechanism is arranged on the lock catch, the dustproof mechanism comprises: a dustproof box, the dustproof box is integrally formed with the lock catch, and the dustproof box covers the occlusion surface of the lock catch and the jump catch; a filler, the filler is arranged on the inner side of the dustproof box and is used to fill the gap between the lock catch and the jump catch when the lock catch is separated from the jump catch.
[0005] Further, the filler comprises a spring and an insulating plug, one end of the spring is fixedly connected to the inner side of the dustproof box, the other end of the spring is fixedly connected to the insulating plug, a guide inclined surface is arranged on the insulating plug, when the lock catch and the jump catch are occluded, the insulating plug is extruded and exits the gap, and when the lock catch and the jump catch are separated, the spring pushes the insulating plug into the gap.
[0006] Further, the insulating plug is made of hard insulating material.
[0007] Further, the shape of the insulating plug is matched with the shape of the gap.
[0008] Further, the dustproof box comprises an upper cover body and a lower cover body, the upper cover body and the lower cover body are buckled with each other, a through hole is formed in the dustproof box for the movement of the jump catch, and the shape of the through hole is matched with the shape of the jump catch.
[0009] Further, a dustproof coating is arranged on the inner side surface of the dustproof box.
[0010] Further, the through hole is provided with a closure, the closure comprising: a first sliding plate and a first spring and a second sliding plate and a second spring, one end of the first spring being fixedly connected with the inner side surface of the dustproof box, the other end being fixedly connected with one end of the first sliding plate, one end of the second spring being fixedly connected with the inner side surface of the dustproof box, the other end being fixedly connected with one end of the second sliding plate; the first sliding plate and the second sliding plate are respectively located on the two sides of the through hole, a first supporting plate is arranged below the first sliding plate, a second supporting plate is arranged below the second sliding plate, and the first sliding plate and the second sliding plate slide in the left-right direction of the through hole.
[0011] Further, the first sliding plate and the second sliding plate are made of lightweight plastic.
[0012] Further, the first sliding plate and the second sliding plate are smooth in surface.
[0013] Further, the lightweight plastic is polypropylene or polyethylene.
[0014] The beneficial technical effects of the present application are:
[0015] The small circuit breaker with the lock catch with full protection against dust adhesion of the present application can effectively prevent the adhesion of the lock catch caused by dust accumulation, thereby ensuring the normal operation of the circuit breaker and improving the electrical safety performance. The design of the dustproof box can not only effectively block the external dust from entering the engagement surface of the lock catch and the trip catch, but also further fill the gap when the lock catch and the trip catch are separated, thereby avoiding the accumulation of dust in the gap. The closure on the through hole of the dustproof box further enhances the dustproof effect and improves the protection performance of the lock catch. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 : a structure diagram of an existing small circuit breaker;
[0017] Figure 2 : a structure diagram of the small circuit breaker with the lock catch with full protection against dust adhesion of the present application;
[0018] Figure 3 : a structure diagram of the dustproof box of an embodiment of the present application;
[0019] Figure 4 : a structure diagram of the filler of an embodiment of the present application;
[0020] Figure 5 : a structure diagram of the dustproof box of another embodiment of the present application;
[0021] Figure 6 : a structure diagram of the filler of another embodiment of the present application;
[0022] In the above figure: 1 handle, 2 connecting rod, 3 jump buckle, 301 jump buckle occlusal surface, 4 lock buckle, 401 lock buckle occlusal surface, 5 dustproof box, 501 through hole, 502 upper cover body, 6 filler, 601 spring, 602 insulating plug, 701 first sliding plate, 702 first spring, 703 second sliding plate, 704 second spring, 705 first supporting plate, 706 second supporting plate. DETAILED DESCRIPTION
[0023] The following examples further illustrate the content of the present application, but should not be construed as limiting the present application. Any modification or replacement of the method, steps or conditions of the present application without departing from the spirit and essence of the present application shall fall within the scope of the present application.
[0024] As shown in Figure 1 The existing miniature circuit breaker includes a handle 1, a connecting rod 2, a lock buckle 4, and a jump buckle 3. The handle 1 is connected to the lock buckle 4 through the connecting rod 2. One end of the lock buckle 4 is occluded with the jump buckle 3. In the normal use process of the circuit breaker, the handle 1 is operated to drive the connecting rod 2, so that the lock buckle 4 and the jump buckle 3 are occluded or separated, thereby controlling the on-off of the circuit.
[0025] In the closing process of the miniature circuit breaker, the handle is pushed upward to drive the connecting rod 2, and the connecting rod 2 drives the jump buckle occlusal surface 301 to move away from the lock buckle occlusal surface 401, thereby completing the closing action. In the opening process, the handle 1 drives the connecting rod 2 downward, and the connecting rod 2 drives the jump buckle occlusal surface 301 to move away from the contact surface of the lock buckle occlusal surface 401, thereby completing the opening action.
[0026] However, the occlusal surfaces of the lock buckle 4 and the jump buckle 3 of the existing miniature circuit breaker are invaded by the decoration paint in a misty form and are adhered and accumulated between the occlusal surfaces, so that the lock buckle 4 and the jump buckle 3 cannot be normally and rapidly tripped when the miniature circuit breaker is overloaded or short-circuited, thereby affecting the safe disconnection of the circuit. Moreover, the decoration paint invaded in a misty form and adhered and accumulated between the occlusal surfaces cause the lock buckle 4 and the jump buckle 3 to be not tightly occluded, thereby affecting the normal operation of the circuit breaker and possibly causing the circuit to be not completely disconnected or closed.
[0027] To solve this problem, the present application provides a lock buckle of a miniature circuit breaker with full protection against adhesion of dust.
[0028] In some embodiments, as shown in Figure 2 A lock buckle of a miniature circuit breaker with full protection against adhesion of dust, the lock buckle is provided with a dustproof mechanism, and the dustproof mechanism comprises:
[0029] The dustproof box 5 is integrally formed with the lock buckle 4, and covers the occlusal surfaces of the lock buckle 4 and the jump buckle 3.
[0030] The filler 6 is arranged on the inner side of the dustproof box 6, and is used to fill the gap between the lock catch 4 and the jump catch 3 when the lock catch 4 is separated from the jump catch 3.
[0031] In this embodiment, by arranging the dustproof box 5 and the filler 6, the invasion of the decoration paint mist into the engagement surface between the lock catch 4 and the jump catch 3 is effectively prevented, and the problem of adhesion and accumulation of the engagement surface is avoided. The design of the dustproof box 5 being integrally formed with the lock catch 4 ensures the stability and durability of the dustproof box 5, so that it is not easy to fall off or be damaged in the long-term use. At the same time, the arrangement of the filler 6 can quickly fill the gap between the lock catch 4 and the jump catch 3 when they are separated, further preventing dust or other impurities from entering the engagement surface. In addition, the materials of the dustproof box 5 and the filler 6 are insulating materials, which ensure the safety and stability of the circuit. In the use process, even if the circuit breaker is in a high-voltage or high-current state, the dustproof box 5 and the filler 6 will not conduct electricity or produce electric arc, thereby avoiding the occurrence of circuit failure or safety accidents.
[0032] Specifically, in some embodiments, as shown in Figure 4 or Figure 6 the filler 6 includes a spring 601 and an insulating plug 602. One end of the spring 601 is fixedly connected to the inner side of the dustproof box 5, and the other end is fixedly connected to the insulating plug 602. The insulating plug 602 is provided with a guide inclined surface. When the lock catch 4 engages with the jump catch 3, the insulating plug 602 is extruded out of the gap. When the lock catch 4 is separated from the jump catch 3, the spring 601 pushes the insulating plug 602 into the gap. This design enables the filler 6 to automatically fill and exit during the engagement and separation of the lock catch 4 and the jump catch 3, without the need for manual operation, greatly improving the convenience and efficiency of the circuit breaker. In addition, the arrangement of the guide inclined surface enables the insulating plug 602 to be smoothly extruded out of the gap during engagement, avoiding problems caused by loose engagement.
[0033] In some embodiments, the shape of the insulating plug 602 is wedge-shaped, matching the shape of the engagement surface of the lock catch 4 and the jump catch 3, to ensure that the insulating plug 602 can tightly fill the gap and prevent dust or impurities from entering. The wedge-shaped insulating plug 602 can be gradually extruded into the gap during engagement, further enhancing the filling effect. At the same time, the wedge-shaped insulating plug 602 can also smoothly exit the gap when separated, without hindering the engagement of the lock catch 4 and the jump catch 3. This design not only improves the dustproof performance of the circuit breaker, but also ensures its normal working state, ensuring the safety and stability of the circuit. In addition, the materials of the insulating plug 602 and the spring 601 are high-strength insulating materials, which can withstand high-voltage and high-current impact, further improving the safety and reliability of the circuit breaker.
[0034] In some embodiments, as shown in Figure 3 The dustproof box 5 includes an upper cover 502 and a lower cover, which are buckled to each other. A through hole 501 is formed in the dustproof box 5 for the movement of the snap buckle 3. The shape of the through hole 501 matches that of the snap buckle 3.
[0035] The buckling design of the upper cover 502 and the lower cover not only enhances the structural strength of the dustproof box 5, but also ensures the reliability of the dustproof effect. The through hole 503 allows the snap buckle 3 to perform normal engagement and separation actions within the dustproof box 5 without being hindered by the dustproof box 5. The shape of the through hole 503 matches that of the snap buckle 3, ensuring the stability and accuracy of the snap buckle 3 during movement. The amount of dust entering the interior of the dustproof box 5 through the through hole 503 is minimized, further improving the dustproof effect.
[0036] In some embodiments, as shown in Figure 5 To further reduce the amount of foreign matter entering, a closure is provided on the through hole 501. The closure includes a first sliding plate 701 and a first spring 702, and a second sliding plate 703 and a second spring 704. One end of the first spring 702 is fixedly connected to the inner side of one end of the dustproof box 5. The other end of the first spring 702 is fixedly connected to one end of the first sliding plate 701. One end of the second spring 704 is fixedly connected to the inner side of the other end of the dustproof box 5. The other end of the second spring 704 is fixedly connected to one end of the second sliding plate 703. The first sliding plate 701 and the second sliding plate 703 are respectively located on the left and right sides of the through hole 501. A first supporting plate 705 is provided below the first sliding plate 701, and a second supporting plate 706 is provided below the second sliding plate 703. The first sliding plate 701 and the second sliding plate 703 slide in the left and right directions of the through hole.
[0037] When the handle drives the connecting rod 2, and the connecting rod 2 drives the snap buckle 3 to move, the first sliding plate and the second sliding plate move left and right under the joint action of the snap buckle 3 and the first spring and the second spring. The first sliding plate and the second sliding plate are always attached to the left and right sides of the snap buckle 3 under the elastic force of the first spring and the second spring, effectively blocking external dust or other foreign matter from entering the interior of the dustproof box 5 through the through hole 503.
[0038] The first sliding plate 701 and the second sliding plate 703 are made of light plastic, such as polypropylene or polyethylene, which is a light and high-strength material. Such light plastic has good wear resistance and corrosion resistance, and can maintain its performance and function during long-term use. At the same time, the material of the light plastic ensures that the first sliding plate 701 and the second sliding plate 703 only need to be pushed with slight force, maintaining the flexibility and stability of the jump buckle 3 during movement, so that they can closely fit on both sides of the jump buckle 3, effectively blocking the entry of dust or other foreign matter.
[0039] The elastic force of the first spring and the second spring does not hinder the normal movement of the jump buckle 3. When the jump buckle 3 performs the clamping or separating action, the elastic force of the first spring and the second spring can both keep the first sliding plate and the second sliding plate closely fitted with the jump buckle 3 and allow the jump buckle 3 to move smoothly within the dustproof box 5. The dustproof box 5 and the dustproof mechanism inside it do not hinder the movement of the jump buckle 3, thereby ensuring the normal working state of the circuit breaker.
[0040] In addition, in order to further improve the dustproof effect, in some embodiments, a dustproof coating is provided on the inner side surface of the dustproof box 5. The dustproof coating can effectively adsorb and block dust particles entering the inside of the dustproof box 5, reducing the accumulation of dust on the clamping surface, thereby further improving the dustproof effect. The selection of the dustproof coating can be customized according to the actual working environment and the type of dust to ensure the best dustproof performance.
[0041] In summary, the utility model provides a kind of lock catch design of small circuit breaker to increase anti-adhesion dust full protection, by the synergies of dustproof box 5 and filler 6 and first sliding plate 701 and second sliding plate 703, and the application of dustproof coating, the dustproof performance of small circuit breaker and the safety and stability of circuit are significantly improved.In practical application, this design can effectively prevent the invasion of decoration paint mist material and other dust into the clamping surface of the lock catch and the jump buckle, avoid the problem of adhesion and accumulation on the clamping surface, and ensure the normal working state of the circuit breaker.
[0042] Although the utility model has been described in detail above with general description, specific embodiments and tests, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made without deviating from the spirit of the utility model are within the scope of protection required by the utility model.
Claims
1. A locking mechanism for a miniature circuit breaker with enhanced anti-adhesion dust protection, characterized in that, The latch (4) is provided with a dustproof mechanism, which includes: Dustproof box (5) The dustproof box (5) is integrally formed with the buckle (4), and the dustproof box (5) covers the engagement surface of the buckle (4) and the snap fastener (3); Filler (6) The filler (6) is disposed on the inner side of the dust box (5) and is used to fill the gap between the lock (4) and the jump buckle (3) when the lock (4) and the jump buckle (3) are separated.
2. The miniature circuit breaker as described in claim 1, characterized in that, a locking mechanism with anti-adhesion dust protection is added. The filling element (6) includes a spring (601) and an insulating plug (602). One end of the spring (601) is fixedly connected to the front inner side of the dust box (5), and the other end of the spring (601) is fixedly connected to the insulating plug (602). The insulating plug (602) is provided with a guide slope. When the latch (4) engages with the jumper (3), the insulating plug (602) is squeezed out of the gap. When the latch (4) separates from the jumper (3), the spring (601) pushes the insulating plug (602) into the gap.
3. The miniature circuit breaker as described in claim 2, characterized in that, The insulating plug (602) is made of a rigid insulating material.
4. The miniature circuit breaker as described in claim 2, characterized in that, The shape of the insulating plug (602) matches the shape of the gap.
5. The miniature circuit breaker as described in claim 1, characterized in that, a locking mechanism with full protection against sticking dust is added. The dust box (5) includes an upper cover (502) and a lower cover, which are fastened together. The dust box has a through hole (501) for the movement of the snap fastener (3).
6. The miniature circuit breaker as described in claim 1, characterized in that, The dustproof box (5) has a dustproof coating on its inner surface.
7. The miniature circuit breaker as described in claim 5, characterized in that, A sealing component is provided on the through hole. The sealing component includes: a first sliding plate (701), a first spring (702), a second sliding plate (703), and a second spring (704). One end of the first spring (702) is fixedly connected to the inner side of one end of the dust box (5). The other end of the first spring (702) is fixedly connected to one end of the first sliding plate (701). One end of the second spring (704) is fixedly connected to the inner side of the other end of the dust box (5). The other end of the second spring (704) is fixedly connected to one end of the second sliding plate (703). The first sliding plate (701) and the second sliding plate (703) are located on both sides of the through hole (501). A first support plate (705) is provided below the first sliding plate (701), and a second support plate (706) is provided below the second sliding plate (703). The first sliding plate (701) and the second sliding plate (703) slide in the left and right directions of the through hole (501).
8. The miniature circuit breaker as described in claim 7, characterized in that, The first skateboard (701) and the second skateboard (703) are made of lightweight plastic.
9. The miniature circuit breaker as described in claim 8, characterized in that, The surfaces of the first slide plate (701) and the second slide plate (703) are smooth.
10. The miniature circuit breaker as described in claim 8, characterized in that, The lightweight plastic is polypropylene or polyethylene.