Miniature residual-current circuit breaker
By designing limiting card plates and anti-tug components in the circuit breaker, the leakage problem caused by loose wiring holes of the circuit breaker is solved, and the safety of use is improved to prevent electric shock accidents.
Patent Information
- Application Number
- CN202420887091.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-26
AI Technical Summary
Existing circuit breakers are prone to loosening in the wiring hole, resulting in a risk of leakage, and the screws contacted by the screwdriver are dotted, which can easily cause electric shock if the screwdriver has poor insulation performance.
A small leakage circuit breaker is designed to limit the outward movement of the output wire by connecting bolts below the circuit breaker body to the limit card plate, and installing an anti-tug assembly between the limit card plate and the circuit breaker body, including a limit screw sleeve and a limit plug.
It effectively guarantees the safety and stability of the circuit breaker and prevents leakage and electric shock accidents.
Smart Images
Figure CN222619659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a small leakage circuit breaker. Background Art
[0002] A circuit breaker is a switch device that can close, carry and disconnect the current under normal circuit conditions and close, carry and disconnect the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. They are used to distribute electrical energy, start asynchronous motors infrequently, protect power lines and motors, etc., and automatically cut off the circuit when they have serious overloads or short circuits and undervoltage faults. Its function is equivalent to the combination of fuse switches and over-underheating relays. Moreover, it is generally not necessary to change parts after breaking the fault current. At present, it has been widely used.
[0003] Generally, circuit breakers usually use screwdrivers to tighten screws to clamp wires in wiring holes. Generally, the main component of wires is copper, which has strong plasticity but poor elasticity. It is easy to loosen in the wiring hole. Once loose, it will come loose from the wiring hole, causing the risk of leakage. In addition, the screws that the screwdriver touches are dotted. If the insulation performance of the screwdriver is poor, it is very easy to cause electric shock. In view of this, we propose a small leakage circuit breaker. Utility Model Content
[0004] The purpose of the utility model is to provide a small leakage circuit breaker to solve the problem that the existing circuit breaker proposed in the above background technology is easy to loosen in the wiring hole. Once loose, it will come loose from the wiring hole, causing the risk of leakage, and the screws that the screwdriver contacts are dotted. If the insulation performance of the screwdriver is poor, it is very easy to cause the risk of electric shock.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small leakage circuit breaker, comprising a circuit breaker body, a toggle rod and an output wire for connecting the circuit breaker with an external device, the lower end of the circuit breaker body is connected to a limit card plate by a connecting bolt, the limit card plate is provided with hole grooves for connecting the connecting bolts in a direction, an upper guide groove and a lower guide groove are arranged laterally between the limit card plate and the circuit breaker body, the upper guide groove and the lower guide groove are connected by a middle guide groove, an anti-drag component is arranged in the connecting cavity of the upper guide groove, the middle guide groove and the lower guide groove, the anti-drag component comprises a limit screw sleeve and a limit plug, the limit plug is sleeved on the lower end of the limit screw sleeve, and the limit screw sleeve is rotatably connected to the output wire.
[0006] Preferably, the anti-drag component is arranged below a limit clamping plate arranged between the circuit breaker body, and adjacent anti-drag components are arranged at intervals.
[0007] Preferably, the middle guide groove is a conical hole, and the diameter of the end of the conical hole is the same as the diameter of the upper guide groove and the lower guide groove on the corresponding side.
[0008] Preferably, the output wire passes through the limiting screw sleeve, the limiting plug and the lower guide groove in sequence from top to bottom.
[0009] Preferably, the limiting screw sleeve is connected to the circuit breaker body through a thread, and the upper side surface of the upper guide groove is provided with a thread for connecting the limiting screw sleeve.
[0010] Preferably, the limit plug is in movably contact with the middle guide groove, and the limit plug is arranged inside the middle guide groove.
[0011] Preferably, the limit plug is in movably contact with the middle guide groove, and the limit plug is arranged inside the middle guide groove.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. This type of small leakage circuit breaker is connected to a limit card plate by connecting bolts under the circuit breaker body, and an anti-drag component is arranged inside the cavity formed by the limit card plate and the circuit breaker body. When the output wire is subjected to external force and moves to the side away from the circuit breaker body, at this time, the middle guide groove is squeezed by the limit plug, and the limit plug is subjected to the shrinking effect of the middle guide groove. The limit plug will squeeze the output wire passing through the inside, thereby limiting the outward movement of the output wire, effectively ensuring the safety and stability of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;
[0016] Figure 3 This is a schematic diagram of the limit card structure of the utility model;
[0017] Figure 4 For this utility model Figure 2 The enlarged view of M;
[0018] Figure 5 It is a schematic diagram of the connection between the limiting screw sleeve and the limiting plug of the utility model.
[0019] In the figure: 1. circuit breaker body; 2. toggle lever; 3. output wire; 4. limit clamp; 41. lower guide groove; 42. upper guide groove; 43. middle guide groove; 5. connecting bolt; 6. anti-drag assembly; 61. limit screw sleeve; 62. limit plug. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] Example: See Figure 1-5 The utility model provides a technical solution: a small leakage circuit breaker, mainly for existing circuit breakers, which are easy to loosen in the wiring hole. Once loosened, they will come loose from the wiring hole, causing the danger of leakage, and the screws that the screwdriver contacts are dotted. If the insulation performance of the screwdriver is poor, it is very easy to cause the danger of electric shock. The specific scheme is as follows: It includes a circuit breaker body 1, a toggle rod 2 and an output wire 3 for connecting the circuit breaker with external equipment. The lower end of the circuit breaker body 1 is connected to a limit card plate 4 through a connecting bolt 5. A notch for the limit card plate 4 to be clamped is provided on the housing of the circuit breaker at a position corresponding to the limit card plate 4. The notch can facilitate the placement of the limit card plate 4. Holes and grooves for plugging in the connecting bolts 5 are distributed in a direction on the limit card plate 4.
[0022] See also Figure 2 , Figure 3 and Figure 4 An upper guide groove 42 and a lower guide groove 41 are arranged horizontally between the limit card plate 4 and the circuit breaker body 1. The upper guide groove 42 and the lower guide groove 41 are connected through a middle guide groove 43. The middle guide groove 43 is a conical hole, and the diameter of the end of the conical hole is the same as the diameter of the upper guide groove 42 and the lower guide groove 41 on the corresponding side. An anti-drag component 6 is arranged in the communication cavity between the upper guide groove 42, the middle guide groove 43 and the lower guide groove 41. The anti-drag component 6 can prevent the output wire 3 of the circuit breaker from falling off the circuit breaker body 1, further ensuring the stability of the circuit breaker.
[0023] See also Figure 4 and Figure 5, wherein the anti-drag assembly 6 includes a limiting screw sleeve 61 and a limiting plug 62, and the output wire 3 passes through the limiting screw sleeve 61, the limiting plug 62 and the lower guide groove 41 from top to bottom in sequence. The limiting plug 62 is sleeved on the lower end of the limiting screw sleeve 61, and the limiting screw sleeve 61 is rotatably connected to the output wire 3. The limiting card plate 4 is arranged below the anti-drag assembly 6 and is arranged between the circuit breaker body 1, and adjacent anti-drag assemblies 6 are arranged at intervals. The limiting screw sleeve 61 is connected to the circuit breaker body 1 by a thread, and the upper side surface of the upper guide groove 42 is provided with a thread for connecting the limiting screw sleeve 61. The limiting plug 62 is in active contact with the middle guide groove 43, and the limiting plug 62 is arranged inside the middle guide groove 43. The limiting plug 62 and the limiting screw sleeve 61 are collinear in center, and the circuit breaker body 1 and the limiting card plate 4 are symmetrically provided with a card slot for the limiting plug 62 and the limiting screw sleeve 61 to be clamped.
[0024] It is worth noting that the limit plug 62 is made of flexible rubber, and the degree of fit between the limit plug 62 and the middle guide groove 43 can be changed by rotating the limit screw sleeve 61 so that the limit screw sleeve 61 pushes the limit plug 62 to move, thereby changing the fit between the limit plug 62 and the middle guide groove 43, and further limiting the outward movement of the output wire 3.
[0025] For this type of small leakage circuit breaker, when the output conductor 3 is subjected to an external force and moves to a side away from the circuit breaker body 1, at this time, the middle guide groove 43 is squeezed by the limit plug 62, and the limit plug 62 is subjected to the shrinking effect of the middle guide groove 43. The limit plug 62 will squeeze the output conductor 3 passing through the inner side thereof, thereby limiting the outward movement of the output conductor 3; and after the force disappears, the limit plug 62 can restore to the initial state through the elastic reset effect, thereby avoiding the output conductor 3 being pulled and reducing its service life, and further ensuring the safety of the circuit breaker.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A small leakage circuit breaker, comprising a circuit breaker body (1), a toggle lever (2) and an output wire (3) for connecting the circuit breaker to an external device, characterized in that: The lower end of the circuit breaker body (1) is connected to a limit clamping plate (4) via a connecting bolt (5); the limit clamping plate (4) is provided with holes and grooves for inserting the connecting bolts (5) in a directionally distributed manner; an upper guide groove (42) and a lower guide groove (41) are arranged laterally between the limit clamping plate (4) and the circuit breaker body (1); the upper guide groove (42) and the lower guide groove (41) are connected via a middle guide groove (43); an anti-drag component (6) is arranged in a cavity connecting the upper guide groove (42), the middle guide groove (43) and the lower guide groove (41); the anti-drag component (6) comprises a limit screw sleeve (61) and a limit plug (62); the limit plug (62) is sleeved on the lower end of the limit screw sleeve (61); and the limit screw sleeve (61) is rotatably connected to the output conductor (3).
2. A small leakage circuit breaker according to claim 1, characterized in that: The anti-drag component (6) is arranged below a position limiting clamping plate (4) disposed between the circuit breaker body (1), and adjacent anti-drag components (6) are arranged at intervals.
3. A small leakage circuit breaker according to claim 1, characterized in that: The middle guide groove (43) is a conical hole, and the diameter of the end of the conical hole is the same as the diameter of the upper guide groove (42) and the lower guide groove (41) on the corresponding side.
4. A small leakage circuit breaker according to claim 1, characterized in that: The output wire (3) passes through the limiting screw sleeve (61), the limiting plug (62) and the lower guide groove (41) in sequence from top to bottom.
5. A small leakage circuit breaker according to claim 1, characterized in that: The limiting screw sleeve (61) is connected to the circuit breaker body (1) via a thread, and the upper side surface of the upper guide groove (42) is provided with a thread for connecting the limiting screw sleeve (61).
6. A small leakage circuit breaker according to claim 1, characterized in that: The limiting plug (62) is in movable contact with the middle guide groove (43), and the limiting plug (62) is arranged inside the middle guide groove (43).
7. A small leakage circuit breaker according to claim 1, characterized in that: The centers of the limiting plug (62) and the limiting screw sleeve (61) are colinear, and the circuit breaker body (1) and the limiting clamping plate (4) are symmetrically provided with clamping grooves for clamping the limiting plug (62) and the limiting screw sleeve (61).