Electromagnetic power supply main switch with stable contact

Abstract

The utility model discloses a stable-contact electromagnetic power supply main switch, which comprises a switch shell, a fixed iron core coil assembly, a polar plate and a movable iron core assembly are arranged in the switch shell, the movable iron core assembly can axially move in the fixed iron core coil assembly, a static contact plate connected with the fixed iron core coil assembly is arranged in the switch shell, and the static contact plate is connected with the polar plate. A switch contact disc is fixed at the front end of the movable iron core assembly, and the movable iron core assembly realizes contact or disconnection through axial movement; a reset spring axially located at the tail end of the movable iron core assembly is arranged in the switch shell, and a wiring terminal is arranged outside the switch shell. The switch contact disc is a circular contact plate; the switch contact disc can rotate on the movable iron core; the switch contact disc is a circular contact plate, and stable contact can still be achieved after the positions of the switch contact disc and the static contact plate are changed in a rotating mode. The rotary design of the switch contact disc is adopted, stable contact can still be achieved after rotation, different contact faces are achieved, abrasion of a single contact point is reduced, and the service life can be prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive power switch, specifically relating to an electromagnetic power switch with stable contact. Background Technology

[0002] The working principle of an automotive electromagnetic power switch is based on the attraction of an electromagnet to control the power supply. Specifically, when the power switch is in the off state, the electromagnet's coil is not energized and therefore does not generate a magnetic field. When power needs to be turned on, operating the switch attracts the electromagnet's core to one side of the magnetic field, thus closing the power switch and turning on the power. Conversely, when power needs to be turned off, operating the switch again de-energizes the electromagnet's coil, the magnetic field disappears, the core loses its magnetism, the power switch opens, and the power is cut off.

[0003] Currently, automotive electromagnetic power switches on the market have two contacts welded between the moving and stationary contact plates. The positions of these contacts are fixed, meaning they are always in contact at these two points to connect the power. First, the contact points are prone to wear after frequent use, resulting in a short service life. Second, the moving contact plate needs anti-rotation positioning when it moves axially with the moving iron core. However, after frequent use, if the positioning becomes loose or wears down, the moving contact plate may rotate, causing the two contacts to not make proper contact, resulting in poor contact stability. Utility Model Content

[0004] This invention provides a stable electromagnetic power switch with a circular contact plate design. The switch contact plate can maintain stable contact even after the position of the switch contact plate and the stationary contact plate changes due to rotation. The design of the switch contact plate to rotate, and the ability to maintain stable contact after rotation, allows for different contact surfaces, reduces wear at a single contact point, and improves service life, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stable electromagnetic power switch, comprising a switch housing, wherein a fixed iron core coil assembly, a pole plate, and a moving iron core assembly are installed inside the switch housing, the moving iron core assembly can move axially within the fixed iron core coil assembly, a stationary contact plate connected to the fixed iron core coil assembly is installed inside the switch housing, a switch contact plate is fixed at the front end of the moving iron core assembly, and the moving iron core assembly achieves contact or disconnection between the switch contact plate and the stationary contact plate through axial movement; a return spring is installed inside the switch housing and axially located at the end of the moving iron core assembly, and a wiring terminal is provided outside the switch housing.

[0006] Preferably, the moving iron core assembly includes a moving iron core, an insulating platform, an insulating washer, a node spring, and a basin-shaped retaining ring. The switch contact plate is clamped to the head end of the moving iron core via the insulating platform and the insulating washer. The basin-shaped retaining ring is also fixed to the head end of the moving iron core, and the node spring is installed between the basin-shaped retaining ring and the insulating washer.

[0007] Preferably, the switch contact plate is a circular contact plate.

[0008] Preferably, the switch contact plate can rotate on the moving iron core.

[0009] Preferably, the bottom surface of the switch contact plate is provided with a plurality of strip-shaped ribs, the strip-shaped ribs protruding from the bottom surface of the switch contact plate.

[0010] Preferably, the plurality of the strip-shaped ribs are evenly distributed around the bottom surface of the switch contact plate.

[0011] Preferably, the included angle between adjacent strip ribs is 30°.

[0012] Preferably, the top surface of the switch contact plate is provided with a strip-shaped groove corresponding to the strip-shaped rib.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The switch contact plate is designed as a circular contact plate, which ensures stable contact even after the positions of the switch contact plate and the stationary contact plate change due to rotation.

[0015] 2. The switch contact plate is designed to rotate, and it can still maintain stable contact after rotation, achieving different contact surfaces, reducing wear on a single contact point, and improving service life.

[0016] 3. The design of multiple strip ribs creates gaps between the contact surfaces, which facilitates airflow and heat dissipation at the contact points. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model from a top-down view.

[0018] Figure 2 This is a partial side sectional view of the present invention.

[0019] Figure 3 This is a side sectional view of the present invention.

[0020] Figure 4 This is a bottom view schematic diagram of the switch contact plate structure of this utility model;

[0021] Figure 5 This is a side sectional view of the moving iron core assembly of this utility model.

[0022] In the diagram: 1. Switch housing; 2. Fixed iron core coil assembly; 3. Electrode plate; 4. Stationary contact plate; 5. Switch contact plate; 6. Return spring; 7. Terminal block; 8. Moving iron core; 9. Insulating platform; 10. Insulating washer; 11. Node spring; 12. Basin-shaped retaining ring; 13. Strip-shaped rib; 14. Strip-shaped groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a stable electromagnetic power switch, including a switch housing 1. The switch housing 1 contains a fixed iron core coil assembly 2, an electrode plate 3, and a moving iron core assembly. The moving iron core assembly can move axially within the fixed iron core coil assembly 2. The switch housing 1 contains a stationary contact plate 4 connected to the fixed iron core coil assembly 2. A switch contact plate 5 is fixed at the front end of the moving iron core assembly. The axial movement of the moving iron core assembly enables the switch contact plate 5 to contact or disconnect from the stationary contact plate 4. The switch housing 1 contains a return spring 6 axially located at the end of the moving iron core assembly. The switch housing 1 is provided with a terminal block 7. When the terminal block 7 is connected to the power supply, the operation of the switch causes the iron core of the fixed iron core coil assembly 2 and the electrode plate 3 to generate magnetism, attracting the moving iron core assembly. This causes the switch contact plate 5 at the front end of the moving iron core assembly to contact the stationary contact plate 4, thereby closing the power switch and connecting the power supply. Conversely, when it is necessary to cut off the power, the switch is operated again to stop the electromagnet coil from being energized, the magnetic field disappears, the magnet core loses its magnetism, the return spring 6 squeezes the moving iron core assembly back to its original position and separates it from the stationary contact plate 4, the main power switch is turned off, and the power is cut off; the design of the switch contact plate 5 allows for a larger contact surface with the stationary contact plate 4 and better contact stability.

[0025] Specifically, the moving iron core assembly includes a moving iron core 8, an insulating platform 9, an insulating washer 10, a node spring 11, and a basin-shaped retaining ring 12. The switch contact plate 5 is clamped to the head end of the moving iron core 8 through the insulating platform 9 and the insulating washer 10. The basin-shaped retaining ring 12 is also fixed to the head end of the moving iron core 8. The node spring 11 is installed between the basin-shaped retaining ring 12 and the insulating washer 10. In this embodiment, the basin-shaped retaining ring 12, together with the node spring 11, positions the moving iron core 8 relative to the other end of the return spring 6, preventing the return spring 6 from excessively squeezing the moving iron core assembly.

[0026] Specifically, the switch contact plate 5 is a circular contact plate; in this embodiment, the stationary contact plate 4 is designed as two pieces, one above the other, and the switch contact plate 5 is designed as a circular contact plate, so that the switch contact plate 5 and the stationary contact plate 4 can still make stable contact after their positions change due to rotation.

[0027] Specifically, the switch contact plate 5 can rotate on the moving iron core 8; in this embodiment, the stationary contact plate 4 is designed as two pieces, upper and lower, and the switch contact plate 5 is designed to rotate, and can still make stable contact after rotation, so as to realize different contact surfaces, reduce the wear of a single contact point, and improve service life.

[0028] Specifically, the bottom surface of the switch contact plate 5 is provided with a plurality of strip-shaped protrusions 13, which protrude from the bottom surface of the switch contact plate 5; in this embodiment, the design of a plurality of strip-shaped protrusions 13 makes there gaps between the contact surfaces, which is conducive to air circulation and heat dissipation at the contact point.

[0029] Specifically, multiple strip-shaped ribs 13 are evenly distributed around the bottom surface of the switch contact plate 5; in this embodiment, after the switch contact plate 5 is rotated, the equally distributed strip-shaped ribs 13 can ensure that they have the same contact surface as the upper and lower stationary contact plates 4.

[0030] Specifically, the included angle between adjacent strip ribs 13 is 30°; in this embodiment, the strip ribs 13 with an included angle of 30° are the preferred embodiment of this application, ensuring that the strip ribs 13 can contact the stationary contact plate 4 after rotation.

[0031] Specifically, the top surface of the switch contact plate 5 is provided with a strip groove 14 corresponding to the strip rib 13; in this embodiment, the strip groove 14 is provided to facilitate heat dissipation on the back side of the switch contact plate 5 at the contact point with the strip rib 13.

[0032] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0033] Working principle: When the power is connected to terminal 7, the operation of the switch causes the iron core of the fixed iron core coil assembly 2 and the pole plate 3 to generate magnetism, attracting the moving iron core assembly. This causes the switch contact plate 5 at the front end of the moving iron core assembly to contact the stationary contact plate 4, thereby closing the main power switch and connecting the power supply. Conversely, when it is necessary to disconnect the power, the switch is operated again to stop the electromagnet coil from being energized. The magnetic field disappears, the magnet core loses its magnetism, and the return spring 6 presses the moving iron core assembly back to its original position, separating it from the stationary contact plate 4. The main power switch is then turned off, and the power supply is disconnected. The design of the switch contact plate 5 allows for a larger contact area with the stationary contact plate 4, resulting in better contact stability.

[0034] The switch contact plate 5 is designed as a circular contact plate, so that it can still make stable contact after the positions of the switch contact plate 5 and the stationary contact plate 4 are rotated. The switch contact plate 5 is designed to rotate, and it can still make stable contact after rotation, so as to achieve different contact surfaces, reduce wear at a single contact point, and improve service life. The design of multiple strip ribs 13 makes gaps between the contact surfaces, which is conducive to air circulation and heat dissipation at the contact points.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contact-stable electromagnetic main power switch, comprising a switch housing (1), characterized in that, The switch housing (1) contains a fixed iron core coil assembly (2), a pole plate (3), and a moving iron core assembly. The moving iron core assembly can move axially within the fixed iron core coil assembly (2). The switch housing (1) contains a stationary contact plate (4) connected to the fixed iron core coil assembly (2). A switch contact plate (5) is fixed at the front end of the moving iron core assembly. The moving iron core assembly achieves contact or disconnection between the switch contact plate (5) and the stationary contact plate (4) through axial movement. The switch housing (1) contains a return spring (6) axially located at the end of the moving iron core assembly. The switch housing (1) is provided with wiring terminals (7) on the outside.

2. The contact-stable electromagnetic main power switch according to claim 1, characterized in that, The moving iron core assembly includes a moving iron core (8), an insulating platform (9), an insulating washer (10), a node spring (11), and a basin-shaped retaining ring (12). The switch contact plate (5) is clamped to the head end of the moving iron core (8) by the insulating platform (9) and the insulating washer (10). The head end of the moving iron core (8) is also fixed with the basin-shaped retaining ring (12). The node spring (11) is installed between the basin-shaped retaining ring (12) and the insulating washer (10).

3. The contact-stable electromagnetic main power switch according to claim 2, characterized in that, The switch contact plate (5) is a circular contact plate.

4. The contact-stable electromagnetic main power switch according to claim 3, characterized in that, The switch contact plate (5) can rotate on the moving iron core (8).

5. The contact-stable electromagnetic main power switch according to claim 4, characterized in that, The bottom surface of the switch contact plate (5) is provided with a plurality of strip-shaped ribs (13), which protrude from the bottom surface of the switch contact plate (5).

6. A contact-stable electromagnetic main power switch according to claim 5, characterized in that, Multiple strip-shaped ribs (13) are evenly distributed around the bottom surface of the switch contact plate (5).

7. A contact-stable electromagnetic main power switch according to claim 6, characterized in that, The included angle between adjacent strip ribs (13) is 30°.

8. A contact-stable electromagnetic main power switch according to claim 6, characterized in that, The top surface of the switch contact plate (5) is provided with a strip groove (14) corresponding to the strip rib (13).

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