A protective switch

Abstract

The utility model discloses a protective switch, including base, upper cover, static contact, moving contact, outgoing line terminal and handle, and the outgoing line terminal is connected through a conducting wire between moving contact, and the both ends of conducting wire are welded with moving contact and outgoing line terminal respectively, moving contact includes moving contact main part and first welding portion, and the first interface is at the joint of moving contact main part and first welding portion, and conducting wire includes bending part and second welding portion, and the second interface is at the joint of bending part and second welding portion, and the face welding of second welding portion and first welding portion is towards terminal, and the orientation of second welding portion is placed with first interface close to second interface, and the outer end of second welding portion is close to the outer end of first welding portion. The utility model changes the welding structure of conducting wire and moving contact, shortens the swing radius of the junction position of the welding portion and the bending portion of conducting wire when switch opens and closes, thereby reduces the deformation and load of the position, greatly improves the service life of conducting wire and switch.

Description

Technical Field

[0001] This utility model relates to a protective switch. Background Technology

[0002] Publication No. CN108389748B discloses a miniaturized protective switch, comprising a body, a stationary contact, a moving contact, and a handle. The stationary and moving contacts are respectively disposed on the body, and the handle is rotatably disposed on the body. The body includes a base and a top cover. The stationary and moving contacts are respectively disposed on the base, and a reset elastic element is provided between the moving contact and the base or the top cover. The handle is rotatably disposed on the base, and the top cover is disposed on the base. One end of the moving contact is provided with a moving contact that cooperates with the stationary contact. The other end of the moving contact is movably disposed on the base. The top cover extends downward with a limiting portion to limit the upward movement distance of the other end of the moving contact in the open state. (Refer to this invention.) Figure 5 This is a cross-sectional view of the invention in the open state. The moving contact and the outgoing terminal are connected by a wire. The two ends of the wire are welded to the moving contact and the outgoing terminal, respectively. The wire is bent in the middle and has a certain degree of flexibility. When the circuit is open, the upper surface of the moving contact abuts against the lower end of the limiting part. When the handle is turned, the cam part of the handle drives the contact of the moving contact to swing downward. At the same time, the welded end of the moving contact will swing upward with the lower end of the limiting part as the fulcrum. The part welded to the moving contact moves with the moving contact, and the bent part of the wire moves with the welded part. When the switch is opened and closed, the junction of the welded part and the bent part of the wire is repeatedly pulled. With the above structure, the protective switch is prone to breakage at this position when the number of opening and closing is large, which will cause the protective switch to fail. Utility Model Content

[0003] In view of the shortcomings of existing technology, this utility model provides a protective switch.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a protective switch, comprising a base, a top cover, a stationary contact, a moving contact, an outgoing terminal, and a handle. The handle is rotatably mounted on the base. A reset elastic element is abutted between the moving contact and the base. A limiting part is provided on the top cover facing the base. When the switch is open, the upper surface of the moving contact abuts against the lower end of the limiting part. The moving contact and the outgoing terminal are connected by a wire. The two ends of the wire are respectively welded to the moving contact and the outgoing terminal. The moving contact includes a moving contact body and a first welding part. The junction of the moving contact body and the first welding part is the first boundary. The wire includes a bent part and a second welding part. The junction of the bent part and the second welding part is the second boundary. The second welding part and the first welding part are welded to the surface facing the terminal, and the second welding part is positioned such that the first boundary is close to the second boundary and the outer end of the second welding part is close to the outer end of the first welding part.

[0005] Preferably, the first welding portion is bent toward the base, and the bent portion of the wire protrudes toward the upper cover.

[0006] Preferably, the first welding portion is bent toward the upper cover, and the bent portion of the wire protrudes toward the base.

[0007] Preferably, the welding surface of the first welding part is provided with grooved texture.

[0008] Preferably, the limiting portion of the upper cover is provided with reinforcing ribs.

[0009] The beneficial effects of this utility model are as follows: By changing the welding structure of the wire and the moving contact, this utility model shortens the swing radius at the junction of the welded part and the bent part of the wire when the switch is opened and closed, thereby reducing the deformation and load at this position and greatly improving the service life of the wire and the switch. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0011] Figure 2 This is a schematic diagram of the moving contact structure of the first embodiment of this utility model;

[0012] Figure 3 This is a schematic diagram of the wire structure according to the first embodiment of the present invention;

[0013] Figure 4 This is a schematic diagram of the upper cover structure of the first embodiment of the present utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present utility model. Detailed Implementation

[0015] First embodiment, such as Figures 1-4As shown, a protective switch includes a base 10, a top cover 20, a stationary contact 30, a moving contact 40, an outgoing terminal 70, and a handle 50. The handle 50 is rotatably mounted on the base 10. A reset elastic member 51 is abutting between the moving contact 40 and the base 10. The top cover 20 has a limiting part 21 facing the base 10. When the switch is open, the upper surface of the moving contact 40 abuts against the lower end of the limiting part 21. The moving contact 40 and the outgoing terminal 70 are connected by a wire 60, with both ends of the wire 60 connected to the moving contact 40 and the outgoing terminal 70, respectively. The moving contact 40 includes a moving contact body 41 and a first welding portion 42. The junction of the moving contact body 41 and the first welding portion 42 is a first boundary 43. The wire 60 includes a bent portion 61 and a second welding portion 62. The junction of the bent portion 61 and the second welding portion 62 is a second boundary 63. The second welding portion 62 and the first welding portion 42 are welded towards the terminal block, and the second welding portion 62 is positioned such that the first boundary 43 is close to the second boundary 63, and the outer end of the second welding portion 62 is close to the outer end of the first welding portion 42. The first welding portion 42 is bent towards the base 10, and the bent portion 61 of the wire 60 protrudes towards the upper cover 20. In this embodiment, the swing radius of the second junction 63 is reduced from 7.14 mm in the existing structure to 4.11 mm. The swing radius is significantly reduced. After testing, under the conditions of an operating frequency of 450 times / hour and a switching ratio of 1:3, the existing protection switch failed after 26,303 opening and closing tests due to wire breakage. However, the protection switch of this utility model did not break after 60,000 opening and closing tests, and the switch functioned normally.

[0016] The welding surface of the first welding part 42 is provided with grooves 44. The limiting part 21 of the upper cover 20 is provided with reinforcing ribs 22.

[0017] The second embodiment differs from the first embodiment in that the first welding part 42 is bent toward the upper cover 20, and the bent part 61 of the wire 60 protrudes toward the base 10.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Simple modifications and substitutions made by those skilled in the art without departing from the spirit and scope of this utility model are within its protection scope.

Claims

1. A protective switch, comprising a base, a top cover, a stationary contact, a moving contact, an outgoing terminal block, and a handle, wherein the handle is rotatably mounted on the base, a reset elastic element is abutting between the moving contact and the base, a limiting portion is provided on the top cover facing the base, and when the switch is open, the upper surface of the moving contact abuts against the lower end of the limiting portion, and the moving contact and the outgoing terminal block are connected by a wire, characterized in that, The two ends of the wire are respectively welded to the moving contact and the outgoing terminal. The moving contact includes a moving contact body and a first welding part. The junction of the moving contact body and the first welding part is the first boundary. The wire includes a bending part and a second welding part. The junction of the bending part and the second welding part is the second boundary. The second welding part and the first welding part are welded to the surface facing the terminal, and the second welding part is positioned with the first boundary close to the second boundary and the outer end of the second welding part close to the outer end of the first welding part.

2. A protective switch as described in claim 1, characterized in that, The first welding part is bent toward the base, and the bent part of the wire protrudes toward the upper cover.

3. A protective switch as described in claim 1, characterized in that, The first welded part is bent toward the upper cover, and the bent part of the wire protrudes toward the base.

4. A protective switch as described in claim 1, characterized in that, The welding surface of the first welding part has grooves.

5. A protective switch as described in claim 1, characterized in that, The limiting part of the upper cover is provided with reinforcing ribs.

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