A leakage protection switch
By designing the movable contacts into a shaped structure and close to the conductive arm, the problem of the small contact area between the existing leakage protection switch and the conductive arm is solved, which significantly reduces heat generation, extends service life and reduces the risk of electric shock.
Patent Information
- Application Number
- CN202520396246.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2035-03-07
AI Technical Summary
The moving contacts of existing leakage protection switches have small contact area with the conductive arms, resulting in large heat generation, shortening service life, and increasing the risk of electric shock.
The moving contact is designed into a shaped structure, which is close to the surface of the conductive arm, increases the contact area, and improves the positioning effect and contact area through the design of the guide grooves and grooves.
It significantly reduces heat generation, extends the service life of the leakage protection switch, reduces the risk of electric shock caused by its own damage, and makes its performance more reliable.
Smart Images
Figure CN222734871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switches, in particular to a leakage protection switch. Background Art
[0002] With the increasing popularity of industrial production facilities and household appliances, people have more and more opportunities to contact electricity, and the situation of electric shock casualties caused by faults of electrical equipment occurs from time to time. For personal safety and equipment safety, the leakage protection switch, as an effective electrical safety technical device, has been widely used and plays a crucial role.
[0003] At present, the leakage protection switches on the market usually include a base, a cover body, a leakage protection module, an operating mechanism and a contact system. Among them, the contact system includes a conductive arm linked with the operating mechanism, a reset member for resetting the conductive arm, a moving contact arranged on the conductive arm, a moving contact point arranged on the moving contact, a static contact arranged in the base and cooperating with the moving contact, and a static contact point arranged on the static contact. In the actual use process, since the moving contact only contacts the bottom surface of the conductive arm when installed on the conductive arm, the contact area is small, resulting in a large amount of heat generated during use, which will accelerate the reduction of its service life. Seriously, it will cause damage to the leakage protector itself, and then lead to the loss of the protection function of the circuit and increase the electric shock risk. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a leakage protection switch, which can significantly reduce heat generation, improve the service life of the leakage protection switch, reduce the electric shock risk, and make its performance more reliable.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: A leakage protection switch includes a base, a cover body, a leakage protection module, an operating mechanism and a contact system. The contact system includes a conductive arm linked with the operating mechanism, a reset member for resetting the conductive arm, a moving contact arranged on the conductive arm, a moving contact point arranged on the moving contact, a static contact arranged in the base and cooperating with the moving contact, and a static contact point arranged on the static contact. A guide groove for the conductive arm to move is arranged in the base; the moving contact includes a bottom plate and side plates arranged on both sides of the bottom plate, the moving contact point is installed on the bottom plate, and the bottom plate and the two side plates form a C-shaped structure, and the bottom plate and the two side plates are both tightly attached to the surface of the conductive arm.
[0006] By adopting the above technical scheme, the moving contact is set in the shape of a C-shaped structure and is tightly attached to the conductive arm. Compared with the prior art, the contact area between the moving contact and the conductive arm is increased. When energized, it can significantly reduce heat generation, improve the service life of the leakage protection switch, reduce the electric shock risk caused by its own damage, and make its performance more reliable.
[0007] The utility model is further configured that a groove is provided at the bottom of the conductive arm, the bottom plate of the moving contact is embedded in the groove, and the left and right sides of the bottom plate are tightly fitted with the left and right inner walls of the groove.
[0008] By adopting the above technical solution, not only can the positioning effect of the base plate be improved, making its installation structure more stable and reliable, but also the contact area between the conductive arm and the moving contact can be further increased, thereby further reducing heat generation.
[0009] The utility model is further configured such that a limiting protrusion is respectively provided on the left and right sides of the side plate, and a limiting block is provided on the conductive arm for abutting against the bottom of the limiting protrusion to limit the moving contact to a lower stroke, and a channel for the side plate to pass through is formed between the two limiting blocks corresponding to the two limiting protrusions on the same side plate.
[0010] By adopting the above technical solution, the moving contact and the conductive arm are connected in a coordinated manner through a snap-on installation method. The connection structure is simple and reliable, which is conducive to early assembly production and later disassembly and maintenance operations.
[0011] The utility model is further configured that a guiding inclined surface is provided at the bottom end of the limiting protrusion.
[0012] By adopting the above technical solution, a guiding inclined surface is provided on the limiting protrusion. When installing the moving contact, it is only necessary to push it upward from the bottom of the conductor arm. The limiting protrusions on the two side plates of the moving contact are deformed to both sides through the guiding inclined surfaces until the two limiting protrusions move to above the limiting block, and the side plates return to their original state. At the same time, the limiting block presses against the bottom of the limiting protrusion to limit it, thereby realizing the coordinated connection between the moving contact and the conductive arm.
[0013] The utility model is further configured that an upper end of one of the side panels is provided with a bending portion parallel to the bottom panel, and the bending portion, the bottom panel and the two side panels are an integrated structure.
[0014] By adopting the above technical solution, the function of the bent portion is to withstand the burning of the arc and protect the contact body. The bent portion, the bottom plate and the two side plates are designed as an integrated structure, which is not only easy to process, but also has high structural strength and long service life.
[0015] The utility model is further configured that a vent hole is provided through the conductive arm at a position above the bottom plate corresponding to the moving contact.
[0016] By adopting the above technical solution, when the moving contact is pressed against the conductive beam, air can be discharged through the vent hole to facilitate the installation of the moving contact.
[0017] The utility model is further configured that the position of the conductive arm corresponding to the lower end of the vent hole is provided with a clearance cavity for embedding the upper end of the movable contact.
[0018] By adopting the above technical solution, the setting of the clearance cavity can make way for the moving contact, so that the moving contact and the conductive arm can be installed in close cooperation.
[0019] The utility model is further configured such that the reset member is a spring, a positioning protrusion is provided at the bottom of the conductive arm, a positioning groove is provided on the inner wall of the base, one end of the reset member is sleeved on the outer periphery of the positioning protrusion, and the other end of the reset member is embedded in the positioning groove.
[0020] By adopting the above technical solution, a spring is used as a reset member. The advantages of spring reset are simple structure, low cost and easy maintenance. The spring positioning structure is set on the base and the conductive arm, which can improve the stability of the spring installation and movement process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A three-dimensional diagram of the utility model as a whole;
[0022] Figure 2 A cross-sectional view of the utility model as a whole;
[0023] Figure 3 This is a schematic diagram of the structure of the utility model after the cover body is removed;
[0024] Figure 4 This is a schematic diagram of the structure of the utility model after the cover and the base are removed as a whole;
[0025] Figure 5 It is a schematic diagram of the assembly structure of the movable contact and the conductive arm of the utility model;
[0026] Figure 6 It is a structural schematic diagram of the conductive arm of the utility model;
[0027] Figure 7 It is a structural schematic diagram of the moving contact of the utility model.
[0028] In the figure: 1. base; 2. cover; 3. leakage protection module; 4. operating mechanism; 5. contact system; 6. conductive arm; 7. reset member; 8. moving contact; 9. moving contact point; 10. static contact; 11. static contact point; 12. guide groove; 13. bottom plate; 14. side plate; 15. groove; 16. limiting convex part; 17. limiting block; 18. channel; 19. guide slope; 20. bending part; 21. vent hole; 22. give way cavity; 23. positioning protrusion; 24. positioning groove. DETAILED DESCRIPTION
[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0030] Embodiment: As shown in the attached Figures 1 to 7 figure, a leakage protection switch includes a base 1, a cover body 2, a leakage protection module 3, an operating mechanism 4, and a contact system 5. The operating mechanism 4 includes a bracket disposed in the base 1, a tripping pressure plate rotatably disposed on the bracket, a swing arm movably disposed on the bracket and cooperating with the tripping pressure plate, and a dial rotatably disposed at the upper end of the bracket for driving the swing arm to rotate. The contact system 5 includes a conductive arm 6 linked with the operating mechanism 4 (swing arm), a reset member 7 for resetting the conductive arm 6, a moving contact 8 disposed on the conductive arm 6, a moving contact point 9 disposed on the moving contact 8, a static contact 10 disposed in the base 1 and cooperating with the moving contact 8, and a static contact point 11 disposed on the static contact 10. A guide groove 12 for the conductive arm 6 to move is provided in the base 1. The moving contact point 9 is riveted to the moving contact 8, and the static contact point 11 is riveted to the static contact 10. Both the moving contact 8 and the static contact 10 are copper parts. The two static contacts 10 are respectively installed on the neutral wire terminal and the live wire terminal in the base 1. The moving contact 8 includes a bottom plate 13 and side plates 14 disposed on both sides of the bottom plate 13. The moving contact point 9 is installed on the bottom plate 13. The bottom plate 13 and the two side plates 14 form a U-shaped structure. The bottom plate 13 and the two side plates 14 are both closely attached to the surface of the conductive arm 6. The cross-section of the portion of the conductive arm 6 cooperating with the moving contact 8 is rectangular. The moving contact 8 is set in the shape of a U-shaped structure and is closely attached to the conductive arm 6. Compared with the prior art, the contact area between the moving contact 8 and the conductive arm 6 is increased. When energized, heat generation can be significantly reduced, the service life of the leakage protection switch can be improved, the触电 risk caused by its own damage can be reduced, and its performance is more reliable.
[0031] As shown in the attached Figures 5 to 7 figure, a groove 15 is provided at the bottom of the conductive arm 6. The bottom plate 13 of the moving contact 8 is embedded in the groove 15, and the left and right sides of the bottom plate 13 are closely attached to the left and right inner walls of the groove 15. This design can not only improve the positioning effect of the bottom plate 13 and make its installation structure more stable and reliable, but also further increase the contact area between the conductive arm 6 and the moving contact 8, thereby further reducing heat generation.
[0032] As shown in the attached Figures 5 to 7 It should be noted that in the above translation, the description of "触电风险" is a literal translation. In the context of electrical safety, it is more accurately expressed as "electric shock risk". You can adjust it according to the actual situation. Also, please check and correct the text for any possible grammar or expression issues in the original Chinese text to ensure the accuracy and clarity of the translation.As shown, a limiting convex portion 16 is respectively provided on the left and right sides of the side plate 14, and the limiting convex portion 16 and the side plate 14 are an integral structure. A limiting stopper 17 is provided on the conductive arm 6 for abutting against the bottom of the limiting convex portion 16 to limit the lower travel of the movable contact 8. The limiting stopper 17 and the conductive arm 6 are an integral structure, and a channel 18 for the side plate 14 to pass through is formed between two limiting stops 17 corresponding to the two limiting convex portions 16 on the same side plate 14. The matching connection between the movable contact 8 and the conductive arm 6 is realized by a snap-fit installation method, and the connection structure is simple and reliable, which is conducive to early assembly production and later disassembly and maintenance operations.
[0033] As attached Figures 5 to 7 As shown, the bottom end of the limiting protrusion 16 is provided with a guiding inclined surface 19. The limiting protrusion 16 is provided with the guiding inclined surface 19. When installing the moving contact 8, it is only necessary to push it upward from the bottom of the conductor arm, and the limiting protrusions 16 on the two side plates 14 of the moving contact 8 are deformed to both sides through the guiding inclined surface 19 until the two limiting protrusions 16 move to above the limiting block 17, and the side plate 14 returns to its original state. At the same time, the limiting block 17 abuts against the bottom of the limiting protrusion 16 to limit it, so as to realize the matching connection between the moving contact 8 and the conductive arm 6.
[0034] As attached Figure 7 As shown, a bending portion 20 parallel to the bottom plate 13 is provided at the upper end of one of the side plates 14, and the bending portion 20, the bottom plate 13 and the two side plates 14 are an integrated structure. The function of the bending portion 20 is to withstand the burning of the arc and protect the contact body. The design of the bending portion 20, the bottom plate 13 and the two side plates 14 as an integrated structure is not only easy to process, but also has high structural strength and long service life.
[0035] As attached Figure 5 As shown, the conductive arm 6 is provided with a vent hole 21 at a position above the bottom plate 13 corresponding to the movable contact 8. When the movable contact 8 is pressed against the conductive beam, exhaust can be conducted through the vent hole 21 to facilitate the installation of the movable contact 8.
[0036] As attached Figure 6 As shown, the conductive arm 6 is provided with a clearance cavity 22 for the upper end of the movable contact 9 to be embedded at a position corresponding to the lower end of the vent hole 21. The area of the clearance cavity 22 is consistent with the area of the vent hole 21, and can also be designed to be a structure with inconsistent areas according to design requirements. The clearance cavity 22 can be provided to make way for the movable contact 9, so that the movable contact 8 and the conductive arm 6 can be installed in close cooperation.
[0037] As attached Figure 2As shown, the reset member 7 is a spring, a positioning protrusion 23 is provided at the bottom of the conductive arm 6, a positioning groove 24 is provided on the inner wall of the base 1, one end of the reset member 7 is sleeved on the outer periphery of the positioning protrusion 23, and the other end of the reset member 7 is embedded in the positioning groove 24. The spring is used as the reset member 7, and the advantages of spring reset are simple structure, low cost, and easy maintenance. The spring positioning structure is provided on the base 1 and the conductive arm 6, which can improve the stability of the spring installation and movement process.
Claims
1. A leakage protection switch, comprising a base (1), a cover (2), a leakage protection module (3), an operating mechanism (4) and a contact system (5), wherein the contact system (5) comprises a conductive arm (6) arranged in linkage with the operating mechanism (4), a reset member (7) for resetting the conductive arm (6), a movable contact (8) arranged on the conductive arm (6), a movable contact point (9) arranged on the movable contact (8), a stationary contact (10) arranged in the base (1) and cooperating with the movable contact (8), and a stationary contact point (11) arranged on the stationary contact (10), wherein a guide groove (12) for allowing the conductive arm (6) to move is arranged in the base (1); and the characteristics are as follows: The moving contact (8) includes a bottom plate (13) and side plates (14) provided on both sides of the bottom plate (13). The moving contact point (9) is installed on the bottom plate (13). The bottom plate (13) and the two side plates (14) form a U-shaped structure, and the bottom plate (13) and the two side plates (14) are all arranged closely against the surface of the conductive arm (6).
2. A leakage protection switch according to claim 1, characterized in that: A groove (15) is provided at the bottom of the conductive arm (6). The bottom plate (13) of the moving contact (8) is embedded in the groove (15), and the left and right sides of the bottom plate (13) are in close fit with the left and right inner walls of the groove (15).
3. The leakage protection switch according to claim 1, characterized in that: A limiting convex portion (16) is provided on each of the left and right sides of the side plate (14). A limiting stop block (17) for abutting against the bottom of the limiting convex portion (16) to limit the downward stroke of the moving contact (8) is provided on the conductive arm (6), and a channel (18) for the side plate (14) to pass through is formed between the two limiting stop blocks (17) corresponding to the two limiting convex portions (16) on the same side plate (14).
4. A leakage protection switch according to claim 3, characterized in that: A guiding inclined surface (19) is provided at the bottom end of the limiting convex portion (16).
5. A leakage protection switch according to claim 4, characterized in that: A bent portion (20) parallel to the bottom plate (13) is provided at the upper end of one of the side plates (14), and the bent portion (20), the bottom plate (13) and the two side plates (14) are of an integral structure.
6. The leakage protection switch according to claim 1, characterized in that: A ventilation hole (21) is provided through the conductive arm (6) at a position above the bottom plate (13) of the moving contact (8).
7. A leakage protection switch according to claim 6, characterized in that: A让位腔(22) for the upper end of the moving contact point (9) to be embedded is provided at the position of the conductive arm (6) corresponding to the lower end of the ventilation hole.
8. The leakage protection switch according to claim 1, characterized in that: The resetting member (7) is a spring. A positioning protrusion (23) is provided at the bottom of the conductive arm (6), and a positioning groove (24) is provided on the inner wall of the base (1). One end of the resetting member (7) is sleeved on the outer periphery of the positioning protrusion (23), and the other end of the resetting member (7) is embedded in the positioning groove (24).