JPH11135321A - Electromagnetic solenoid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic solenoid in which the production of buffer sounds between a stator and a mover is reduced. SOLUTION: An electromagnetic solenoid is provided with a coil 12, a stator 14 the magnetization of which is controlled by means of an exciting current flowing through the coil 12, a mover 14 which faces opposite to the stator 14 so that the mover 15 moves upon receiving a magnetic attracting force from the state 14, and an elastic body 16 which can resist to the magnetic attracting force between the stator 14 and a mover 15. In the solenoid, an elastic buffer material (a) is provided on the stator 14 side between the counter armature planes of the stator 14 and the mover 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic solenoid used for a massage machine or a vibrator.

[0002]

2. Description of the Related Art FIGS. 7 and 8 are side sectional views of a conventional electromagnetic solenoid. FIG. 7 is a side cross-sectional view showing a state in which an external force from a limb or the like to be massaged is applied to the electromagnetic solenoid, and the stator and the mover are separated. FIG. 8 is a side cross-sectional view showing a state where no external force is applied, or the electromagnetic solenoid is excited, the electromagnetic attraction force overcomes the external force, and the stator and the mover are attracted.

As shown in FIGS. 7 and 8, a conventional electromagnetic solenoid 1 includes a non-magnetic disc-shaped plate 10, an outer yoke 11, a coil 12, and a bobbin 13 around which the coil 12 is wound. , A stator 14 fixed to one end of the bobbin 13, a movable element 15 formed of an exciter that is disposed to face the stator 14 and guides the inner wall of the bobbin 13, and a movable element 15. A coil spring 16 corresponding to an elastic body that urges the stator 14 against the load force, a damper 17 that alleviates the collision, and a non-magnetic rod-shaped shaft 18 fixed to the tip of the movable element 15 are formed. Prepare.

The outer yoke 11 is a hollow, substantially columnar member made of a magnetic metal such as silicon steel or soft magnetic iron, and is fixed to the plate 10 by appropriate means.

The coil 12 has a cylindrical winding body 13a and bobbin flanges 13b connected to both ends thereof. The coil 12 is formed on the outer periphery of the winding body 13a of a bobbin 13 formed of synthetic resin. Is formed by winding a soft copper wire covered with an insulating layer. The coil 12 is attached to the outer yoke 1 together with the bobbin 13.
One is stored.

The stator 14 is made of a magnetic metal having a cylindrical shape, and is formed by cutting or the like into a shape having a stator cylindrical portion 14 a having an outer diameter substantially equal to the inner diameter of the bobbin 13. The stator cylindrical portion 14a is provided with a bobbin 13a of the bobbin 13.
And a movable element 15 described later is coaxially loosely fitted therein. In the stator 14, the stator cylindrical portion 14 a is inserted from one end of the bobbin 13 a of the bobbin 13, and is fixed at one end of the bobbin 13.

The mover 15 is made of a substantially cylindrical magnetic metal which can move with the inner wall of the stator cylindrical portion 14a of the stator 14 as a guide, and has a ring-shaped flange 15a on the opposite side. .

A non-magnetic rod-shaped shaft 18 is provided upright at the center of the stator-side end surface of the mover 15 and penetrates through the plate 10. 19 is fixed.

The coil spring 16 is a coil spring made of stainless steel or the like, penetrated by the shaft 18, and interposed between the plate 10 and the spring receiver 19.

The damper 17 has a donut shape formed of an elastic resin such as rubber. The damper 17 has a rib portion 17a along the vicinity of the outer peripheral edge, and is attached to the bottom portion 11a of the outer yoke 11.

The shaft 18 is formed of a non-magnetic metal material such as brass and is fixed to the mover 15.

The electromagnetic solenoid 1 constructed as described above
When the exciting current of the coil 12 is zero, the mover 15 is at the position shown in FIG. 8 by the spring force of the coil spring 16 loosely fitted on the shaft 18. When an exciting current flows through the coil 12, a magnetic attraction acts on the mover 15 in a direction opposite to the spring force of the coil spring 16, and as shown in FIG. Spring 16
Move to a position where the spring force of is balanced.

The rib 17a of the damper 17 is
When the coil 4 is magnetized by energizing the coil 12 and attracts the mover 15, the flange 15 a of the mover 15 is moved before the stator-side end face of the mover 15 contacts the stator 14.
To the rib portion 17a of the damper 17,
The collision energy between the flange 15a and the mover 15 is absorbed by the damper 17, so that the collision sound generated by the mover 15 is reduced.

[0014]

In the electromagnetic solenoid 1 having the above structure, the movable element 15 is vibrated when the load force F is large and the coil spring 16 is sufficiently compressed. When the intermittent current is applied to the coil 12, even if the flange portion 15 a of the mover 15 abuts against the rib portion 17 a of the damper 17, it does not hit so strongly and does not generate so much damping sound. However, in a case where the load force F is weak and the coil spring 16 is not so compressed, the flange portion 15a of the mover 15 urges the rib portion 17a of the damper 17 vigorously. It has the problem of producing a very intense damping sound.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic solenoid in which the generation of a damping sound between a stator and a mover is reduced. .

[0016]

According to the first aspect of the present invention,
A coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, a mover opposed to the stator whose magnetization is controlled and arranged to be movable by receiving a magnetic attraction from the stator, and a stator. In an electromagnetic solenoid including an elastic body that opposes magnetic attraction between the stator and the mover, an elastic cushioning material is provided on the stator side between opposing contact surfaces of the stator and the mover. It is characterized by having done.

According to a second aspect of the present invention, a coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a stator which is opposed to the magnetization-controlled stator and can be moved by receiving a magnetic attraction from the stator. In an electromagnetic solenoid provided with a mover disposed on the stator and an elastic body that opposes magnetic attraction between the stator and the mover, the stator is disposed on the stator side between opposing contact surfaces of the stator and the mover. An elastic buffer material is provided, and a magnetic member is provided between opposed contact surfaces of the buffer material and the mover.

According to a third aspect of the present invention, a coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a stator which is opposed to the stator whose magnetization is controlled can be moved by receiving magnetic attraction from the stator. An electromagnetic solenoid provided with a mover disposed on the base and an elastic body that opposes magnetic attraction between the stator and the mover, wherein a magnetic member is provided as a magnetic member between opposing contact surfaces of the stator and the mover. It is characterized in that rubber is provided.

According to a fourth aspect of the present invention, the coil, the stator whose magnetization is controlled by the exciting current flowing through the coil, and the stator whose magnetization is controlled are opposed to the stator and can be moved by receiving magnetic attraction from the stator. An electromagnetic solenoid having a mover disposed in the armature and an elastic body that opposes magnetic attraction between the stator and the mover, a soft member serving as a magnetic member between opposing contact surfaces of the stator and the mover. A magnetic material is provided.

According to a fifth aspect of the present invention, in the electromagnetic solenoid of the first to fourth aspects, a stopper for limiting a movable range of the magnetic member and the cushioning member is provided.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG. 1 and a second embodiment will be described with reference to FIG.
3 and FIG. 3, a third embodiment will be described in detail with reference to FIG. 4 to FIG. In the related art, the same parts as those of the electromagnetic solenoid described based on FIGS. 7 and 8 are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 1 is a side sectional view of an electromagnetic solenoid.

As shown in FIG. 1, the electromagnetic solenoid 1 is
A non-magnetic disc-shaped plate 10, an outer yoke 11,
The coil 12, a bobbin 13 around which the coil 12 is wound, a stator 14 fixed to one end of the bobbin 13, and disposed opposite to the stator 14, and the inner wall of the bobbin 13 is used as a guide. A movable element 15 made of an exciter, a coil spring 16 corresponding to an elastic body for urging the movable element 15 against the stator 14 against the load force, and a non-magnetic rod-shaped fixed to the tip of the movable element 15 And a shaft 18.

The electromagnetic solenoid 1 shown in FIG. 1 is different from the conventional one in the following features. That is, an elastic cushioning member a made of a spring, rubber, or the like is provided between opposing contact surfaces of the stator 14 and the mover 15. Then, before the outer yoke 11 and the flange 15a of the mover 15 come into contact with each other, the stator 14 and the mover 15 are brought into contact with each other via the buffer material a inside the stator 14.

The cushioning material a has a substantially cylindrical shape, and the stator 1
4 has a diameter such that it can be disposed in the inner top part, and a through hole through which the shaft 18 is inserted is provided at the center.

According to the present embodiment, the cushioning material a
In the state where no external force is applied or the electromagnetic solenoid is excited, the electromagnetic attraction force overcomes the external force, and in the state where the stator and the mover are attracted, the impact between the stator 14 and the mover 15 is relieved by the stator 14. It becomes possible. Also,
Since the buffer portion between the stator 14 and the mover 15 exists inside the stator 14, it is possible to significantly reduce the damping noise generated as compared with the conventional electromagnetic solenoid 1 in which the buffer portion is exposed. Becomes

[Second Embodiment] FIG. 2 is a side sectional view of an electromagnetic solenoid. FIG. 3 is a perspective view of a buffer section made of a buffer material and magnetic rubber.

As shown in FIG. 1, the electromagnetic solenoid 1
A non-magnetic disc-shaped plate 10, an outer yoke 11,
The coil 12, a bobbin 13 around which the coil 12 is wound, a stator 14 fixed to one end of the bobbin 13, and disposed opposite to the stator 14, and the inner wall of the bobbin 13 is used as a guide. A movable element 15 made of an exciter, a coil spring 16 corresponding to an elastic body for urging the movable element 15 against the stator 14 against the load force, and a non-magnetic rod-shaped fixed to the tip of the movable element 15 And a shaft 18.

The electromagnetic solenoid 1 shown in FIG. 1 is different from the conventional one in the following features. That is, an elastic cushioning material a made of a spring, rubber, or the like is disposed between the opposing contact surfaces of the stator 14 and the mover 15, and a magnetic material is provided between the opposing contact surfaces of the cushioning material a and the mover 15. The configuration is such that a magnetic rubber b is provided as a member. Before the outer yoke 11 and the flange portion 15a of the mover 15 come into contact with each other, the stator 14 and the mover 15
And a magnetic rubber b.

A buffer c comprising a buffer material a and a magnetic rubber b
Is substantially cylindrical, as shown in FIG.
Have through-holes d1 and d2 at the center where shafts 18 are inserted.

Here, the magnetic rubber b is formed by mixing a magnetic powder such as iron into a rubber material having elasticity.
It has the properties of both a cushioning material and a magnetic material, and it is possible to increase the magnetic permeability from several times to several tens times depending on the magnetic properties and amount of the magnetic powder, and also to adjust the hardness. .

A buffer c comprising a buffer material a and a magnetic rubber b
Thus, when no external force is applied or the electromagnetic solenoid is excited, the electromagnetic attraction force overcomes the external force, and the stator and the movable element 15 are attracted by the stator and the movable element.
Can be reduced. Further, since the magnetic path of the magnetic flux can be secured by the magnetic rubber b, the magnetic resistivity is several times smaller than the case where only the buffer material a is provided between the opposed contact surfaces of the stator 14 and the mover 15. It can be reduced from one-fifth to one-tenth, and the decrease in the electromagnetic attraction can be reduced.

When a soft magnetic material such as electromagnetic soft iron or ferrite is used in place of the magnetic rubber b, the buffer effect at the time of adsorption between the stator 14 and the movable element 15 is smaller than that of the magnetic rubber b. Although smaller, the soft magnetic material has a higher magnetic permeability than the magnetic rubber b, so that the decrease in the electromagnetic attraction can be greatly suppressed.

In the present embodiment, the buffer c is provided with a buffer material a.
And magnetic rubber b (or soft magnetic material)
The buffer section c may be composed of only the magnetic rubber b (or soft magnetic material).

[Third Embodiment] FIG. 4 is a side sectional view of an electromagnetic solenoid. FIG. 5 is a perspective view showing a state in which a buffer portion made of a buffer material and magnetic rubber is attached to a stator, and the internal structure is clarified by cutting out a part of the stator. FIG. 6 is a side cross-sectional view showing a state in which a buffer made of a buffer material and magnetic rubber is attached to a stator.

As shown in FIG. 4, the electromagnetic solenoid 1 is
A non-magnetic disc-shaped plate 10, an outer yoke 11,
The coil 12, a bobbin 13 around which the coil 12 is wound, a stator 14 fixed to one end of the bobbin 13, and disposed opposite to the stator 14, and the inner wall of the bobbin 13 is used as a guide. A movable element 15 made of an exciter, a coil spring 16 corresponding to an elastic body for urging the movable element 15 against the stator 14 against the load force, and a non-magnetic rod-shaped fixed to the tip of the movable element 15 And a shaft 18.

The electromagnetic solenoid 1 shown in FIG. 3 is different from the conventional one in the following features. That is, an elastic cushioning material a made of a spring, rubber, or the like is disposed between the opposing contact surfaces of the stator 14 and the mover 15, and a magnetic material is provided between the opposing contact surfaces of the cushioning material a and the mover 15. The configuration is such that a magnetic rubber b is provided as a member. In the present embodiment, the cushioning material a and the magnetic rubber b are not fixed by an adhesive or the like, but are locked and fixed to the inner surface of the stator 14.

A buffer c comprising a buffer material a and a magnetic rubber b
Is substantially cylindrical, as shown in FIG.
Have through-holes d1 and d2 at the center where shafts 18 are inserted.

Here, the magnetic rubber b is formed by mixing a magnetic powder such as iron into a rubber material having elasticity.
It has the properties of both a cushioning material and a magnetic material, and it is possible to increase the magnetic permeability from several times to several tens times depending on the magnetic properties and amount of the magnetic powder, and also to adjust the hardness. .

The magnetic rubber b may be fixed to the cushioning material a or the inner wall of the stator 14 using an adhesive or the like, but if the magnetic rubber b is not firmly fixed to the cushioning material a or the inner wall of the stator 14, There is no problem if the magnetic rubber b and the mover 15 are not attracted and the magnetic rubber b moves integrally with the mover 15. Therefore, in this embodiment, as shown in FIGS. 5 and 6, in order to prevent the magnetic rubber b from integrally operating while being attracted to the mover 15, the opening 14 b of the stator 14 is A stopper 14c is provided on the inner wall in the vicinity. The mover 15 has a diameter that can be inserted into the opening 14b, and the magnetic rubber b has a diameter larger than the opening 14b. As a result, the magnetic rubber b is
The stopper 14
The operation of the magnetic rubber b is restricted by c, and the magnetic rubber b and the movable element 15 which are adsorbed are prevented from coming off and operating integrally. If the buffer material a has a larger diameter than the opening portion 14b, it is not necessary to similarly firmly fix the inner top portion of the stator 14 using an adhesive or the like.

Buffer section c comprising buffer material a and magnetic rubber b
Thus, when no external force is applied or the electromagnetic solenoid is excited, the electromagnetic attraction force overcomes the external force, and the stator and the movable element 15 are attracted by the stator and the movable element.
Can be reduced. Further, since the magnetic path of the magnetic flux can be secured by the magnetic rubber b, the magnetic resistivity is several times smaller than the case where only the buffer material a is provided between the opposed contact surfaces of the stator 14 and the mover 15. It can be reduced from one-fifth to one-tenth, and the decrease in the electromagnetic attraction can be reduced.

Further, the magnetic rubber b is formed by the stopper 14c.
If the movable range is limited, the magnetic rubber b operates integrally with the movable element 15 even if the cushioning material a and the magnetic rubber b are not firmly fixed to the stator 14 and the like using an adhesive or the like. And other problems can be prevented. In the present embodiment, the stopper 14c is provided on the stator 14;
The location of the stopper 14c is not limited to this.

When a soft magnetic material such as electromagnetic soft iron or ferrite is used in place of the magnetic rubber b, the buffer effect at the time of adsorption between the stator 14 and the movable element 15 is smaller than that of the magnetic rubber b. Although smaller, the soft magnetic material has a higher magnetic permeability than the magnetic rubber b, so that the decrease in the electromagnetic attractive force can be greatly suppressed.

Further, the buffer portion c of the present embodiment is provided with a buffer material a.
And magnetic rubber b (or soft magnetic material)
The buffer section c may be composed of only the magnetic rubber b (or soft magnetic material).

[0045]

As described above, according to the first aspect of the present invention, the coil, the stator whose magnetization is controlled by the exciting current flowing through the coil, and the stator which is opposed to the stator whose magnetization is In an electromagnetic solenoid including a mover arranged to be movable under magnetic attraction, and an elastic body that opposes magnetic attraction between the stator and the mover, the electromagnetic solenoid includes a stator and a mover. An elastic cushioning material is arranged on the stator side between the opposing contact surfaces, so that the damping noise generated by the contact between the stator and the mover is suppressed inside the stator by the cushioning material. Therefore, it is possible to provide an electromagnetic solenoid in which the generation of buffer noise between the stator and the mover is reduced.

According to the second aspect of the present invention, the coil, the stator whose magnetization is controlled by the exciting current flowing through the coil, and the stator which is opposed to the stator whose magnetization is controlled and which receives magnetic attraction from the stator and moves. In an electromagnetic solenoid provided with a mover disposed so as to be able to perform the magnetic attraction between the stator and the mover, the fixing between the opposed contact surfaces of the stator and the mover is performed. A cushioning material with elasticity is arranged on the child side,
Since the magnetic member is arranged between the opposing contact surfaces of the cushioning member and the mover, the buffering sound generated by the contact between the stator and the mover can be reduced by the cushioning material. The magnetic member has an effect that it is possible to prevent a reduction in the electromagnetic attraction force between the stator and the mover.

According to the third aspect of the present invention, the coil, the stator whose magnetization is controlled by the exciting current flowing through the coil, and the stator which is opposed to the stator whose magnetization is controlled and which receives magnetic attraction from the stator and moves. And an elastic body that opposes a magnetic attraction between the stator and the movable element, the magnetic solenoid between the opposed armature surfaces of the stator and the movable element. Since the magnetic rubber is provided as the member, it is possible to prevent the magnetic attraction between the stator and the mover from being reduced by the magnetic rubber, and to further reduce the damping sound.

According to the fourth aspect of the present invention, the coil, the stator whose magnetization is controlled by an exciting current flowing through the coil, and the stator which is opposed to the stator whose magnetization is controlled and which receives a magnetic attraction from the stator and moves. And an elastic body that opposes a magnetic attraction between the stator and the movable element, the magnetic solenoid between the opposed armature surfaces of the stator and the movable element. Since a soft magnetic material is provided as a member, it is possible to further reduce the electromagnetic attraction force while reducing the damping noise between the stator and the mover by the soft magnetic material. It has the effect of becoming.

In the invention according to claim 5, claim 1 is
In the electromagnetic solenoid according to the present invention, a stopper is provided to limit the movable range of the magnetic member and the cushioning member. Therefore, the magnetic member and the cushioning member are movable because the magnetic member is attracted to the mover by a magnetic force. This brings about an effect that it is possible to prevent the device from operating integrally with the child.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electromagnetic solenoid according to a first embodiment.

FIG. 2 is a side sectional view of an electromagnetic solenoid according to a second embodiment.

FIG. 3 is a perspective view of a buffer portion made of a buffer material and magnetic rubber.

FIG. 4 is a side sectional view of an electromagnetic solenoid according to a third embodiment.

FIG. 5 is a perspective view showing a state in which a buffer made of a buffer material and magnetic rubber is attached to a stator.

FIG. 6 is a side cross-sectional view showing a state in which a buffer made of a buffer material and magnetic rubber is attached to a stator.

FIG. 7 is a side sectional view of a conventional electromagnetic solenoid.

FIG. 8 is a side sectional view of a conventional electromagnetic solenoid.

[Description of Signs] 1 Electromagnetic solenoid 12 Coil 14 Stator 14c Stopper 15 Mover 16 Elastic body (coil spring) a Buffer material b Magnetic member (magnetic rubber)

Claims (5)

[Claims] 1. A coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a movable member which is opposed to the stator whose magnetization is controlled and which is movable to receive a magnetic attraction from the stator. A solenoid, comprising an armature and an elastic body that opposes magnetic attraction between the stator and the mover,
An electromagnetic solenoid, wherein an elastic cushioning material is provided on a stator side between opposing contact surfaces of a stator and a mover. 2. A coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a movable member facing the stator whose magnetization is controlled and movable to receive a magnetic attraction from the stator. A solenoid, comprising an armature and an elastic body that opposes magnetic attraction between the stator and the mover,
An elastic cushioning material is arranged on the stator side between the opposed contact surfaces of the stator and the mover, and a magnetic member is arranged between the opposed contact surfaces of the cushion and the mover. An electromagnetic solenoid characterized by the following. 3. A coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a movable member which faces the stator whose magnetization is controlled and is movable to receive a magnetic attraction from the stator. A solenoid, comprising an armature and an elastic body that opposes magnetic attraction between the stator and the mover,
An electromagnetic solenoid, wherein a magnetic rubber is disposed as a magnetic member between opposing contact surfaces of a stator and a mover. 4. A coil, a stator whose magnetization is controlled by an exciting current flowing through the coil, and a movable member which faces the stator whose magnetization is controlled and is movable to receive a magnetic attraction from the stator. A solenoid, comprising an armature and an elastic body that opposes magnetic attraction between the stator and the mover,
An electromagnetic solenoid, wherein a soft magnetic material is provided as a magnetic member between opposing contact surfaces of a stator and a mover. 5. The electromagnetic solenoid according to claim 1, wherein a stopper for limiting a movable range of the magnetic member and the cushioning material is provided.