KR20110068511A - Solenoid - Google Patents

Abstract

PURPOSE: A solenoid is provided to reinforce the lifting power of a plunger by directly magnetic force generated from a coil to the plunger through bushing. CONSTITUTION: A case(11) forms the outer appearance of a solenoid(10). A bobbin(12) has a cylindrical shape and is combined with the inner side of the case. A coil(13) is wound around the outer side of the bobbin and generates magnetic force. A plunger(14) is vertically moved by the magnetic force generated from the coil. A sleeve(15) is inserted into the inner side of the bobbin and guides the lifting of the plunger.

Description

Solenoid {SOLENOID}

The present invention relates to a solenoid, and more particularly to a solenoid that can increase the force by improving the structure to minimize the half of the magnetic force.

In general, solenoids are long coils that generate a magnetic field when current flows through them. The solenoid, in consultation, refers to an electromechanical device that generates dynamics using current as energy.

1 is a cross-sectional view showing a conventional solenoid.

As shown in FIG. 1, a conventional solenoid is inserted into a bobbin 3 formed in a cylindrical shape inside a case 2, a coil 4 wound around an outer circumferential surface of the bobbin 3, and a bobbin 3. And a plunger 6 which is inserted into the sleeve 5, which is formed in a pipe shape, and moves up and down by a magnetic force generated when power is applied to the coil 4.

In addition, the conventional solenoid 1 further includes a bushing 7 coupled to the upper outer peripheral surface of the sleeve 5, the outer surface of the bushing 7 being in contact with the inner peripheral surface of the bobbin 3.

The bushing 7 is made of a magnetic material and serves to increase the magnetic force generated from the coil 4 and transmit it to the plunger 6.

Therefore, when power is applied to the coil 4, as the magnetic force is generated inside the coil 4 and the plunger 6 is lowered, the shaft 8 connected to the lower end of the plunger 6 is lowered.

At this time, the auxiliary spring (9) embedded in the plunger (6) is extended in length as the plunger (6) is lowered to have an elastic force.

On the other hand, when power is not applied, the plunger 6 is raised and returned to its original state by the spring force of the object connected to the shaft 8 and the elastic force of the auxiliary spring 9.

Therefore, the plunger 6 repeats the lowering or raising operation depending on whether the power is applied.

However, in the conventional solenoid 1, since the bushing 7 is attached to the upper outer circumferential surface of the sleeve 5, the magnetic force generated in the coil 4 passes through the sleeve 5, which is a nonmagnetic material, to the plunger 6. As it is transmitted, there is a problem that the lifting force of the plunger 6 is weakened as the magnetic force is reduced while passing through the sleeve 5.

The present invention is to solve the problems as described above, an object of the present invention is to provide a solenoid that can directly transfer the magnetic force generated in the coil to the plunger through the bushing to strengthen the lifting force of the plunger.

According to a feature of the present invention for achieving the object as described above, the present invention is formed in a case, a cylindrical shape, the bobbin is coupled to the inside of the case, when the power is applied to the outer peripheral surface of the bobbin A coil generating magnetic force, a plunger lifting and lowering by the magnetic force generated from the coil, a sleeve inserted into the inner circumferential surface of the bobbin and guiding the lifting operation of the plunger, and increasing the magnetic force generated from the coil to be transmitted to the plunger It is made of a magnetic material and includes a bushing in direct contact with the inner peripheral surface of the bobbin and the plunger.

The present invention further includes a lower body provided as a permanent magnet in the lower portion of the plunger and a spring provided between the lower body and the plunger to provide elastic force to the plunger.

The case has an upper and a lower plate coupled to shield the upper and lower surfaces, the case and the upper and lower plates are formed of a conductive material, characterized in that the bushing is installed in contact with the upper plate.

The bushing is characterized in that it comprises a coating layer on the inner peripheral surface.

The bushing is made of a cold rolled steel material, the sleeve is made of a non-magnetic material, characterized in that provided in the lower portion of the bushing to guide the lifting operation of the plunger.

The present invention further includes a shaft connected between the plunger and the object to be operated and a damper installed at the upper and lower portions of the plunger to absorb noise and vibration during the lifting operation of the plunger and the shaft operating according to the lifting operation of the plunger. It is characterized by including.

As described above, the present invention is a magnetic body of the bushing provided on the upper portion of the sleeve for guiding the lifting operation of the plunger is coupled between the bobbin and the plunger to directly contact the upper plate and the bushing and the plunger.

Accordingly, the present invention prevents the magnetic force transmitted from the coil to the plunger to be weakened by the nonmagnetic sleeve, and directly transfers the magnetic force generated inside and outside the coil to the plunger through the bushing to improve the force of the plunger's lifting operation. You can. The present invention, as a result of measuring the lifting force of the plunger, can be increased by about 15% or more compared with the conventional solenoid.

As a result, the present invention has the effect of improving the operating performance of the solenoid.

Hereinafter, a solenoid according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of a solenoid according to a preferred embodiment of the present invention.

As shown in FIG. 2, the solenoid 10 according to the preferred embodiment of the present invention has a case 11, a bobbin 12 formed in a cylindrical shape and coupled to the inside of the case 11, and the bobbin 12. Coil (13) wound around the plunger (14) inserted into the bobbin (12) to move up and down, the sleeve (15) inserted into the bobbin (12), the upper portion of the sleeve (15) It includes a bushing 16 to be inserted, a lower body 17 provided below the plunger 14 and a spring 18 provided between the plunger 14 and the lower body 17.

The case 11 forms an outer appearance of the solenoid 10, and is formed in a box shape having approximately an upper surface and a lower surface opened.

The upper plate 111 and the lower plate 112 are coupled to the upper and lower surfaces of the case 11, respectively.

The case 11 and the upper and lower plates 111 and 112 may be formed of a conductive material so that a magnetic field formed in the coil 13 flows.

Bobbin 12 is formed in a substantially cylindrical shape, the upper and lower flanges 121, 122 to prevent the coil 13 from spreading outside the bobbin and the bushing coupling is coupled to the bushing 16 on the upper inner peripheral surface The coupling part 123 which forms the space 123 'is provided.

That is, as shown in FIG. 2, the bobbin 12 is provided with a stepped diameter because the diameter of the upper portion of the inner circumferential surface corresponding to the coupling portion 123 is larger than the diameter of the lower portion.

The coil 13 is wound to overlap the outer circumferential surface of the bobbin 12 a plurality of times, and generates a magnetic force by forming a magnetic field when power is applied. It is preferable that the coil 13 is fixed so as not to be loosened arbitrarily, and that the coil 13 is dressed with a tape 131 on the outer circumferential surface of the coil 13 in order to prevent damage by foreign matter or impact.

The plunger 14 is inserted into the bobbin 12 to move up and down in accordance with the magnetic force generated from the coil 13 and the magnetic force of the lower body 17 provided as a permanent magnet in the lower portion of the plunger 14.

That is, the plunger 14 is lowered by the pulling force with the lower body 17 when power is applied to the coil 13 to generate a magnetic field. On the other hand, when the power applied to the coil 13 is cut off and the magnetic field is extinguished, the plunger 14 is raised by the elastic force of the spring 18 and returns to its original state.

The plunger 14 has a shaft 141 connected to the object to be operated, and between the plunger 14 and the upper plate 111 to absorb shock and noise during the lifting operation of the plunger 14; Dampers 142 and 143 are provided between the plunger 14 and the lower body 17, respectively.

The mating surfaces of the plunger 14 and the lower body 17 are formed to correspond to each other. For example, as illustrated in FIG. 2, the plunger 14 has a recess groove formed by being recessed in a lower surface thereof, and the lower body 17 has a coupling protrusion formed by protruding to correspond to the recess groove in an upper surface thereof. It can be provided. On the other hand, as shown in Figure 1, the plunger 14 has a coupling protrusion, the lower body 17 may be changed to have a recess groove.

The sleeve 15 is formed in a pipe shape to guide the lifting operation of the plunger 14. The sleeve 15 is made of a nonmagnetic material such as brass having high strength and hardness.

The bushing 16 is formed in a cylindrical shape through which the center portion is inserted so that the plunger 14 is inserted, and is coupled to the bushing coupling space 123 ′ formed by the coupling portion 123 of the bobbin 12. The bushing 16 is formed to be smaller than the height of the plunger 14 for smooth lifting operation of the plunger 14, the coating layer is preferably formed on the inner peripheral surface.

The bushing 16 includes a magnetic force generated outside the coil 13 and a magnetic force generated inside the coil 13 together with the magnetic material generated through the upper plate 111, which is provided as a conductive material and serves as a ruler, to the plunger 14. It serves to convey.

To this end, the bushing 16 is preferably provided such that the upper surface in contact with the upper plate 111 or a portion of the upper portion is inserted by using a magnetic material such as cold drawn steel (Cold Drawn Steel).

Next, the coupling relationship and operation of the solenoid according to an embodiment of the present invention will be described in detail.

As shown in FIG. 2, the solenoid 10 according to the preferred embodiment of the present invention has a plurality of coils 13 formed on the outer circumferential surface of the bobbin 12 in a state in which the case 11 and the lower plate 112 are coupled to each other. And insert the sleeve 15 into the inner circumferential surface of the bobbin 12, and then insert the lower body 17, the spring 18, the damper 143, the plunger 14, and the bushing 15. Binding inside. In addition, the upper plate 111 having the damper 142 attached to the lower surface is coupled to the upper surface of the case 11 to be shielded.

When power is applied to the coil 13 of the solenoid 10 according to the preferred embodiment of the present invention configured as described above, a magnetic field is formed inside the coil 13.

Then, since the bushing 16 provided as a magnetic material is in contact with the upper plate 111 formed of a conductive material, the magnetic force generated inside the coil 13 transmitted through the upper plate 111 and the coil 13 inside. The magnetic force generated in the transfer to the plunger (14). Thus, the plunger 14 is provided along the inner circumferential surface of the bushing 16 and the inner circumferential surface of the sleeve 15 as the magnetic force generated from the coil 13 and the magnetic force of the lower body 17 provided with the permanent magnet act in the pulling direction. Descend. At this time, since the coating layer is formed on the inner circumferential surface of the bushing 16, the plunger 14 is smoothly lowered.

By the lowering operation of the plunger 14, the spring 18 is elastically deformed to reduce the height, and the plunger 14 and the lower body 17 are in contact with each other and remain in contact with each other.

At this time, the solenoid 10 according to the preferred embodiment of the present invention is formed in the bushing coupling formed on the upper portion of the sleeve 15 by forming the length of the sleeve 15 shorter than the conventional sleeve 5 by the length of the bushing 16 Since the bushing 16 is coupled to the space 123 ′ and the bushing 16 is installed in contact with the upper plate 111, there is no overlapping portion of the bushing 16 and the sleeve 15. The magnetic force generated in) is directly transmitted to the plunger 14 via the bushing 16.

In particular, since the bushing 16 receives the magnetic force generated outside the coil 13 through the upper plate 111 in contact with the upper plate 111 made of a conductive material, the bushing 16 is generated inside the coil 13. The magnetic force and the magnetic force generated outside the coil 13 may be added to transfer the increased magnetic force to the plunger 14.

Thus, the plunger 14 is directly lowered by receiving a magnetic force without being disturbed by the sleeve 15, which is a nonmagnetic material, and thus the force of the lowering operation is improved.

Accordingly, the shaft 141 coupled to the plunger 14 and the object connected to the shaft 141 also move downward.

As a result of experiment using the solenoid 10 according to the present embodiment, the force acting during the lowering operation of the plunger 14 in the solenoid 10 according to the present embodiment is about 530 gf, the plunger in the conventional solenoid 1 It can be seen that an increase of about 15% or more compared to the force of about 460 gf acting during the lowering operation of (6).

On the other hand, when the power supplied to the coil 13 is cut off, the magnetic field formed inside the coil 13 is extinguished.

Then, as the force acting in the direction in which the plunger 14 and the lower body 17 are in contact with each other is dissipated, the plunger 14 is raised by the elastic force of the elastically deformed spring 18 to its original state. To return.

Through the operation as described above, the present invention is to combine the bushing to the upper portion of the sleeve is inserted into the inner peripheral surface of the bobbin to improve the force of the lifting operation of the plunger by supplying the magnetic force generated from the coil directly to the plunger through the bushing Can be.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

1 is a cross-sectional view showing a conventional solenoid.

2 is a cross-sectional view of a solenoid according to a preferred embodiment of the present invention.

`` Explanation of symbols for main parts of drawings ''

10: solenoid 11: case

12: bobbin 13: coil

14: plunger 15: sleeve

16: bushing 17: underbody

18: spring

Claims (6)

A case 11 forming an appearance, Bobbin 12 is formed in a cylindrical shape coupled to the inside of the case 11, A coil 13 which is wound around the outer circumferential surface of the bobbin 12 and generates magnetic force when power is applied; Plunger 14, which is lifted and operated by the magnetic force generated from the coil 13, A sleeve 15 inserted into an inner circumferential surface of the bobbin 12 to guide a lifting operation of the plunger 14; It is characterized in that it comprises a bushing (16) made of a magnetic material to increase the magnetic force generated from the coil 13 to the plunger 14 to directly contact the inner circumferential surface of the bobbin 12 and the plunger 14 Solenoid. The method of claim 1, Lower body 17 is provided as a permanent magnet in the lower portion of the plunger 14 and And a spring (18) provided between the lower body (17) and the plunger (14) to provide an elastic force to the plunger (14). The method according to claim 1 or 2, The case 11 has upper and lower plates 111 and 112 coupled to shield the upper and lower surfaces, The case 11 and the upper and lower plates 111 and 112 are formed of a conductor material. The bushing (16) is characterized in that the solenoid is installed in contact with the upper plate (111). 4. The bushing (16) according to claim 3, wherein the bushing (16) A solenoid comprising a coating layer on an inner circumferential surface. The method of claim 4, wherein The bushing 16 is made of cold rolled steel material, The sleeve 15 is made of a nonmagnetic material, characterized in that provided in the lower portion of the bushing (16) to guide the lifting operation of the plunger (14). The method of claim 4, wherein A shaft 141 connected between the plunger 14 and an object to be operated and operated according to the lifting operation of the plunger 14; The solenoid further comprises a damper (142, 143) installed on the upper and lower portions of the plunger (14) to absorb noise and vibration during the lifting operation of the plunger (14).

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