WO2020215380A1

WO2020215380A1 - Electromagnetic switch device

Info

Publication number: WO2020215380A1
Application number: PCT/CN2019/086250
Authority: WO
Inventors: 严绪东; 金云浩; 石梦珣; 游泳
Original assignee: 常州市瑞泰光电有限公司
Priority date: 2019-04-24
Filing date: 2019-05-09
Publication date: 2020-10-29
Also published as: CN109950067A; CN109950067B

Abstract

The present invention provides an electromagnetic switch device, comprising a housing having a receiving space, as well as a first coil and a second coil that are stacked in an axial direction and fixed in the receiving space. The electromagnetic switch device also comprises a movable iron core disposed in a first coil, a fixed iron core disposed in a second coil, and a connector connected to the side of the movable iron core away from the fixed iron core and configured to connect external components. The movable iron core is driven by the first coil and the second coil to move in the direction close to or away from the fixed iron core along the axial direction and drive the connector to move. In the electromagnetic switch device provided by the present invention, when the second coil is externally energized, the internal fixed iron core is magnetized to form a fixed magnetic field, and when the first coil is externally energized simultaneously, the internal movable iron core is magnetized to form an equivalent magnet together with the first coil, so that an electromagnetic force is generated between the movable iron core and the fixed iron core to drive the movable iron core to move. The connector is driven to move synchronously during the movement of the movable iron core so as to drive the lifting and lowering of the external components. The electromagnetic switch device provided by the present invention has a simple structure, the machining and assembly of parts are simple, and the cost is low.

Description

Electromagnetic switching device

【Technical Field】

The present invention relates to the field of electronic equipment, and in particular to an electromagnetic switch device used in a mobile terminal.

【Background technique】

The current component lifting scheme in the mobile phone industry relies on the module of stepper motor, reducer, and transmission screw pair to realize the lifting function of the internal components of the mobile phone; its working principle is: the extended gear shaft of the stepper motor meshes with the gear of the reducer , The motor rotates at high speed, and the torque is transmitted to the reducer through the gear to achieve speed reduction and torque increase. The rear end of the reducer is connected with the screw pair to convert the rotary motion into linear motion. The nut on the screw pair moves linearly to drive the internal components. Lift. This kind of existing lifting scheme has shortcomings and shortcomings: the structure of the module is complex, the parts processing accuracy is high, the assembly is difficult, the cost is high, and the mass production is difficult.

Therefore, it is necessary to provide an electromagnetic switching device with a simpler structure.

[Content of the invention]

The purpose of the present invention is to provide an electromagnetic switch device with a simpler structure.

The technical scheme of the present invention is as follows:

An electromagnetic switch device is provided, which is characterized in that it comprises a housing with a housing space, and a first coil and a second coil that are stacked in an axial direction and fixed in the housing space; the electromagnetic switch device further includes a sleeve The movable iron core in the first coil, the fixed iron core sleeved in the second coil, and the connection connected to the side of the movable iron core away from the fixed iron core and used for connecting external components The movable iron core is driven by the first coil and the second coil to move in an axial direction toward or away from the fixed iron core and drive the connecting piece to produce displacement.

Further, the electromagnetic switch device further includes a guide rod extending in the axial direction and having two ends respectively connected to the inner wall surface of the housing, and the movable iron core and the fixed iron core are sleeved on the guide rod, And the movable iron core can slide along the guide rod, and the fixed iron core is fixed relative to the guide rod.

Further, the number of the guide rods is two, the two guide rods are arranged side by side and spaced in a direction perpendicular to the axial direction, and the movable iron core and the fixed iron core are both sleeved on the two guide rods.

Further, a fixing protrusion is convexly provided on the end surface of one end of the guide rod, and a fixing groove adapted to the fixing protrusion is recessed on the inner wall surface of the housing.

Further, the electromagnetic switch device further includes a reset elastic member arranged between the moving iron core and the fixed iron core or between the moving iron core and the housing.

Further, the reset elastic member is a coil spring.

Further, the electromagnetic switch device further includes a first yoke attached to one side of the first coil and the moving iron core, and the first yoke is located between the moving iron core and the fixed iron core. between.

Further, the first yoke corresponding to the guide rod is penetrated with a first escape hole, and the guide rod extends through the first escape hole.

Further, the electromagnetic switch device further includes a second yoke covering one side of the second coil and the fixed iron core, and the second yoke is located between the fixed iron core and the moving iron core. And the first yoke is axially spaced apart, the second yoke is provided with a second escape hole corresponding to the guide rod, and the guide rod extends through the second escape hole.

Further, the connecting member includes a buckle and a connecting rod connecting the buckle and the moving iron core, and a through hole for the connecting rod to pass is opened on the housing.

Further, the housing includes a housing body having the accommodating space and a cover plate covering the housing body, and the through hole is provided on the cover plate.

Further, the housing body includes a bottom wall opposite to the cover plate and spaced apart, and a side wall extending from the edge of the bottom wall toward the cover plate, and the fixed iron core is fixed on the bottom wall , The movable iron core is arranged between the cover plate and the fixed iron core.

The beneficial effects of the present invention are that: in the electromagnetic switch device provided by the present invention, the second coil is energized externally, the internal fixed iron core is magnetized to form a fixed magnetic field, the first coil is energized externally at the same time, and the internal moving iron core is magnetized. An equivalent magnet is integrally formed with the first coil, and electromagnetic force is generated between the fixed iron core and the moving iron core to drive the moving iron core. During the movement of the moving iron core, the connecting piece is driven to move, thereby driving the external components to rise and fall, so that the electromagnetic switch device provided by the present invention Simple structure, simple parts processing and assembly, and low cost.

【Explanation of drawings】

FIG. 1 is a schematic structural diagram of an electromagnetic switch device provided by an embodiment of the present invention;

2 is a schematic cross-sectional view of the electromagnetic switching device along the line A-A in an embodiment of the present invention (the direction indicated by the arrow is the cutting direction);

3 is a schematic cross-sectional view of the electromagnetic switch device along the line A-A in another embodiment of the present invention (the direction indicated by the arrow is the cutting direction).

100. Electromagnetic switching device; 11. First coil; 12. Second coil; 21. Moving iron core; 22. Fixed iron core; 3. Connecting piece; 4. Shell; 5. Guide rod; 51. Fixed boss; 410. Fixing groove; 61. First yoke; 610. First escape hole; 62. Second yoke; 620. Second through slot; 31. Bolt; 32. Connecting rod; 420. Through hole; 40 41. Housing main body; 42, cover plate; 7, reset elastic member; 411, bottom wall; 412, side wall.

【Detailed ways】

The present invention will be further described below with reference to the drawings and embodiments.

1 and 2, the present invention provides an electromagnetic switch device 100, including a housing 1 having a receiving space, and a first coil 11 and a second coil 12 that are stacked in the axial direction and fixed in the receiving space The electromagnetic switch device also includes a movable iron core 21 sleeved in the first coil 11, a fixed iron core 22 sleeved in the second coil 12, and a side connected to the movable iron core 21 away from the fixed iron core 22 And for connecting the connecting piece 3 of external components, the movable iron core 21 is driven by the first coil 11 and the second coil 12 to move in the axial direction toward or away from the fixed iron core 22 and drive The connecting member 3 is displaced.

Current is applied to the second coil 12, and the inner fixed iron core 22 is magnetized to form a fixed magnetic field. At the same time, when current is applied to the first coil 11, the inner moving iron core 21 is magnetized, forming an equivalent magnet integrally with the first coil 11, and An electromagnetic force is generated between the iron core 22 and the second coil 12 to push the moving iron core 21 to move. The moving iron core 21 drives the connecting piece 3 to move synchronously during the movement, thereby driving the external components to rise and fall. Specifically, the first coil 11 is connected with The current in the same direction of the second coil 12, the inner movable iron core 21 and the first coil 11 are attracted to the fixed iron core 22, and the movable iron core 21 drives the buckle 31 down (moving to the right in FIG. 2). 11 passes current in the opposite direction to the second coil 12, the internal movable iron core 21 and the first coil 11 as a whole repel the fixed iron core 22, and the movable iron core 21 drives the latch 31 to rise (moving to the left in FIG. 2). The electromagnetic switch device 100 provided by the present invention has a simple structure, simple parts processing and assembly, and low cost.

Preferably, the electromagnetic switch device 100 further includes a guide rod 5 extending in the axial direction and connected to the inner wall surface of the housing 4 at both ends, the movable iron core 21 and the fixed iron core 22 are sleeved on the guide rod 5, and the movable The iron core 21 can slide along the guide rod 5, and the fixed iron core 22 is fixed relative to the guide rod 5.

The extension direction of the guide rod 5 is parallel to the axial direction of the coil, which can install and position the first coil 11, the second coil 12, the movable iron core 21 and the fixed iron core 22, and also fix the fixed iron core 22 It also plays a role of guiding the moving iron core 21.

Preferably, the number of guide rods 5 is two, and the two guide rods 5 are arranged side by side and spaced in a direction perpendicular to the axial direction, and the movable iron core 21 and the fixed iron core 22 are both sleeved outside the two guide rods 5.

Preferably, the end surface of one end of the guide rod 5 is convexly provided with a fixing protrusion 51, and the inner wall surface of the housing 4 is concavely provided with a fixing groove 410 adapted to the fixing protrusion 51, and the guide rod 5 is connected to the fixing protrusion 51 through the fixing protrusion 51. The fixing groove 410 is connected to the housing 4.

The number of guide rods 5 is two, which makes the installation of the first coil 11, the second coil 12, the moving iron core 21 and the fixed iron core 22 more stable. Preferably, the two guide rods 5 are opposite to the first coil 11 and the second coil 12 The central axis is symmetrical.

Preferably, referring to FIG. 3, the electromagnetic switch device further includes a reset elastic member arranged between the moving iron core and the fixed iron core or between the moving iron core and the housing 1. The return elastic member 7 can be a compression spring or a tension spring. The compression spring can help the movable iron core 21 to rise after being compressed, and the tension spring can help the movable iron core 21 to fall after being stretched to increase the restoring force. When the component is arranged between the moving iron core 21 and the fixed iron core 22, direct collision between the fixed iron core 22 and the moving iron core 21 can be avoided.

Preferably, the reset elastic member 7 is a coil spring. The coil spring is sleeved on the guide rod 5, and preferably two coil springs are provided on each guide rod 5 one by one.

Preferably, the electromagnetic switch device 100 further includes a first yoke 61 attached to the side of the first coil 11 and the moving iron core 21 close to the second coil 12 and the fixed iron core 22, and the first yoke 61 is located Between the movable iron core 21 and the fixed iron core 22.

The first yoke 61 is made of a magnetic material, which can reduce the magnetic resistance, increase the utilization rate of the magnetic field, and increase the electromagnetic force received by the coil, thereby providing a stronger driving force.

Preferably, the first yoke 61 corresponds to the guide rod 5 with a first escape hole 610 extending therethrough, and the guide rod 5 extends through the first escape hole 610.

Preferably, the electromagnetic switch device 100 further includes a second yoke 62 covering the second coil 12 and the fixed iron core 22, and the second yoke 62 is located between the fixed iron core 22 and the moving iron core 21 and The first yoke 61 is spaced apart from the first yoke 61 in the axial direction, and the second yoke 62 has a second escape hole 620 through the guide rod 5, and the guide rod extends through the second escape hole 620.

The second yoke 62 is made of a magnetic material, which further reduces the magnetic resistance, increases the utilization rate of the magnetic field, and increases the electromagnetic force received by the coil, thereby providing a stronger driving force.

Preferably, the connecting member 3 includes a buckle 31 and a connecting rod 32 connecting the buckle 31 and the movable iron core 21, and the housing 4 is provided with a through hole 420 through which the connecting rod 32 passes.

The internal component may be a camera, the latch 31 is ring-shaped, and a lock hook that engages with the latch 31 is installed on the camera. Of course, the camera and the latch 31 may also be fixedly connected by threads.

Preferably, the housing 4 includes a housing main body 41 having a housing space 40 for accommodating the first coil 11 and the second coil 12, the fixed iron core 22 and the moving iron core 21, and a cover plate 42 covering the housing main body 41 , The through hole 420 is provided on the cover plate 42. The arrangement of the cover plate 42 facilitates opening the housing 4 to inspect and repair internal components.

Preferably, the housing body 41 includes a bottom wall 411 opposite to the cover plate 42 and spaced apart, and a side wall 412 extending from the edge of the bottom wall 411 toward the cover plate 42. The fixed iron core 22 is fixed to the bottom wall 411, and the movable iron core 21 is arranged between the cover plate 42 and the fixed iron core 22.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

An electromagnetic switch device, characterized in that it comprises a housing with a housing space, and a first coil and a second coil that are stacked in the axial direction and fixed in the housing space; the electromagnetic switch device further includes The movable iron core in the first coil, the fixed iron core arranged in the second coil, and the connecting piece connected to the side of the movable iron core away from the fixed iron core and used to connect external components, so The movable iron core is driven by the first coil and the second coil to move in an axial direction toward or away from the fixed iron core and drives the connecting member to produce displacement.
The electromagnetic switch device according to claim 1, characterized in that: the electromagnetic switch device further comprises a guide rod extending in the axial direction and having two ends respectively connected to the inner wall surface of the housing, the movable iron core and the fixed The iron core is sleeved on the guide rod, and the movable iron core can slide along the guide rod, and the fixed iron core is fixed relative to the guide rod.
The electromagnetic switch device according to claim 2, wherein the number of the guide rods is two, and the two guide rods are arranged side by side and spaced in a direction perpendicular to the axial direction, and the movable iron core and the fixed The iron core is sleeved on the two guide rods.
The electromagnetic switch device according to claim 2, wherein the end surface of one end of the guide rod is convexly provided with a fixed convex post, and the inner wall surface of the housing is concavely provided with a fixed convex post. Fix the groove.
The electromagnetic switch device according to claim 1, wherein the electromagnetic switch device further comprises a reset provided between the movable iron core and the fixed iron core or between the movable iron core and the housing Elastic pieces.
The electromagnetic switch device according to claim 5, wherein the reset elastic member is a coil spring.
The electromagnetic switch device according to claim 2, wherein the electromagnetic switch device further comprises a first yoke attached to one side of the first coil and the moving iron core, the first yoke Located between the moving iron core and the fixed iron core.
7. The electromagnetic switch device according to claim 7, wherein the first yoke is provided with a first avoiding hole corresponding to the guide rod, and the guide rod extends through the first avoiding hole.
The electromagnetic switch device according to claim 7, wherein the electromagnetic switch device further comprises a second yoke covering one side of the second coil and the fixed iron core, the second yoke Located between the fixed iron core and the moving iron core and spaced from the first yoke in the axial direction, the second yoke is provided with a second escape hole corresponding to the guide rod. The rod extends through the second escape hole.
The electromagnetic switch device according to claim 1, wherein the connecting member includes a buckle and a connecting rod connecting the buckle and the moving iron core, and the housing is provided with a connecting rod for passing through Of through holes.
The electromagnetic switch device according to claim 10, wherein the housing includes a housing body having the accommodating space and a cover plate covering the housing body, and the through hole is provided in the cover plate on.
The electromagnetic switch device according to claim 11, wherein the housing main body includes a bottom wall opposite to the cover plate and spaced apart, and side walls extending from an edge of the bottom wall toward the cover plate , The fixed iron core is fixed on the bottom wall, and the movable iron core is arranged between the cover plate and the fixed iron core.