JP3603646B2 - Electromagnetic solenoid for Tataki massager machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic solenoid used for a tachy massage machine.
[0002]
[Prior art]
FIG. 9 is an explanatory view showing a conventional electromagnetic solenoid for a tataki massage machine. FIG. 9A is a cross-sectional side view showing a state in which an external force F from a limb or the like to be massaged is applied to the electromagnetic solenoid and the stator and the mover are separated, and FIG. 9B is an external force F applied. FIG. 7 is a cross-sectional side view showing a state where the stator is not engaged or the electromagnetic solenoid is excited, the electromagnetic attraction force overcomes the external force and the stator and the plunger are attracted.
[0003]
As shown in FIG. 9, a conventional electromagnetic solenoid 1 includes a non-magnetic disk-shaped plate 10, an outer yoke 11, a coil 12, a bobbin 13 around which the coil 12 is wound, and one end of the bobbin 13. And a plunger 15 made of a magnetic material, which is disposed to face the stator 14 and guides the inner wall of the bobbin 13, and the movable element 15 which faces the stator 14 against the load force. The plunger 15 includes a coil spring 16 corresponding to an elastic body which is negatively biased, a damper 17 for mitigating a collision, and a non-magnetic rod-shaped shaft 18 fixed to the tip of the plunger 15.
[0004]
The outer yoke 11 is formed 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 is wound around a bobbin 13 made of an insulating material, and is housed together with the bobbin 13 in a hollow portion of the outer yoke 11. The plunger 15 is made of a columnar magnetic metal that can move with the inner wall of the through-hollow portion coinciding with the central axis of the bobbin 13 as a guide, and the stator-side contact surface has a tapered shape. A ring-shaped flange 15a is formed on the side. The stator 14 is made of a magnetic metal, and the contact surface with the plunger has a tapered shape corresponding to the shape of the mover. The through hole 13 a having a circular cross section formed along the central axis of the bobbin 13. To one end.
[0005]
The non-magnetic rod-shaped shaft 18 is provided upright at the center of the end face of the plunger 15 on the stator side, penetrates the plate 10, and a disk-shaped spring receiver 19 is fixed to the tip of the shaft 18. . The coil spring 16 is penetrated by the shaft 18 and is 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 installed on a plane portion of the outer yoke 11 by appropriate means. The massage machine body is fixed to the massage machine body by a suitable means using the plate 10 or the outer yoke 11.
[0006]
In the above-described electromagnetic solenoid 1, when the stator 14 is magnetized by energizing the coil 12 and attracts the mover 15, the stator-side end face of the plunger 15 contacts the stator 14. Before the contact, the flange 15a of the plunger 15 is applied to the rib 17a of the damper 17 to absorb the collision energy of the flange 15a and the plunger 15 with the damper 17, thereby reducing the impact sound generated by the plunger 15. ease.
[0007]
In such a solenoid, when the coil is energized and a magnetic field is generated, an electromagnetic attraction force is generated at the opposed contact surface between the stator and the plunger. Separately, a rubber damper for absorbing shock is required. Further, since thrust is generated even when no external force is applied, noise is generated.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional electromagnetic solenoid 1, when the load force F is large and the coil spring 16 is sufficiently compressed, that is, in order to vibrate the plunger 15, the intermittent current is applied to the coil 12. At this time, even if the flange portion 15a of the plunger 15 contacts the rib portion 17a of the damper 17, the impact force is not so strong, so that a strong impact sound is not generated, but the load force F is small and the coil spring 16 is compressed so much. If not, the flange 15a of the plunger 15 vigorously hits the rib 17a of the damper 17, so that even if the damper 17 is interposed, there is a problem that a considerably intense impact sound is generated.
[0009]
The present invention has been made in view of this point, and an object of the present invention is to provide an excellent electromagnetic solenoid for a tataki massager capable of reducing noise and suppressing a decrease in electromagnetic attraction force accompanying the noise. To provide.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, a plunger made of a rod-shaped magnetic material, an exciting coil surrounding the plunger in a cylindrical shape, a coil frame made of an insulator around which the exciting coil is wound, and an exciting coil surrounding the exciting coil are formed. and in a substantially C-shaped to a core to form a made magnetic flux path of a magnetic material, and a guide for supporting the slide in the axial direction of the plunger, the attachment holder for transmitting the thrust generated by the plunger to the beating treatment section , A connecting rod for connecting the attachment holder and the plunger, and an elastic member connected to the attachment holder and the core and holding the plunger at a neutral point of magnetic force.
[0011]
According to a second aspect of the present invention, there is provided the electromagnetic solenoid according to the first aspect, wherein the guide for supporting the sliding of the plunger is made of an insulating material such as resin molding.
[0012]
According to a third aspect of the present invention, in the electromagnetic solenoid according to the first aspect, a guide for supporting the sliding of the plunger is integrated with the coil frame.
[0013]
According to a fourth aspect of the present invention, in the electromagnetic solenoid of the first aspect, as shown in FIG. 3, the angle of the outer end face of the inner diameter portion of the core projection having a substantially C-shaped cross section is 90 degrees. It is.
[0014]
According to a fifth aspect of the present invention, in the electromagnetic solenoid according to the first aspect, when the plunger is located at a neutral point of the magnetic force as shown in FIG. Assuming that the distances at which the portions overlap each other are d1 and d2, and the axial lengths of the upper and lower protrusions are d3 and d4, respectively, the dimensions satisfy d1 = d2, d3 = d4, and d1 = 0.5 × d3. It is characterized by having a relationship.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of an electromagnetic solenoid according to the present invention is shown in FIGS. 1 to 3, a second embodiment is shown in FIG. 4, a third embodiment is shown in FIG. 5, and a fourth embodiment is shown. An embodiment will be described in detail with reference to FIG. 6, and a fifth embodiment will be described in detail with reference to FIGS. 7 and 8, respectively.
[0016]
[First Embodiment] The electromagnetic solenoid for a tataki massager machine shown in FIG. 1 is different from the conventional one in the following features. That is, a plunger 23 made of a rod-shaped magnetic material, an exciting coil 26 surrounding the plunger 23 in a cylindrical shape, a coil frame 24 made of an insulating material around which the exciting coil 26 is wound, and a cross section substantially C surrounding the exciting coil 26. and a mold, a core 22 forming the magnetic flux path of a magnetic material, a guide 25 for supporting the slide in the axial direction of the plunger 23, the attachment holder 20 which transmits the thrust generated by the plunger 26 to the beating treatment section And a connecting rod 21 connecting the attachment holder 20 and the plunger 23, and an elastic member 27 connected to the attachment holder 20 and the core 22 and holding the plunger 23 at a neutral point of magnetic force.
[0017]
In the above penetrating structure, the plunger 23 does not stick to the stator, so that only the sliding sound does not generate an impact sound, and the noise can be reduced. Further, by setting the elastic member 27 so that the position of the plunger 23 is at the neutral point of the magnetic force in a state where no external force is applied, no thrust is generated. It is possible to achieve a quiet operation. However, most of the electromagnetic attraction force is generated in the direction from the stator to the plunger 23, that is, in the direction perpendicular to the axis, and the axial component required for the movement of the plunger 23 is substantially the axis of the plunger 23. This occurs at both ends in the direction, and the thrust generation efficiency is reduced. Therefore, the portion of the plunger 23 facing the protrusion of the core 22 is not tapered, is substantially rod-shaped, and has an angle on the inner diameter side of the protrusion end face of the substantially C-shaped core 22 for generating electromagnetic attraction and the plunger 23. Is 90 degrees, the magnetic flux density at both ends of the plunger 23 is increased to increase the electromagnetic attraction force. However, the corners at both ends may be chamfered to a sufficiently small degree with respect to each diameter depending on workability and productivity.
[0018]
When the plunger 23 is located at the neutral point of the magnetic force as shown in FIG. 2, distances at which the plunger 23 and the upper and lower protrusions of the core 22 having a substantially C-shaped cross section overlap are represented by d1 and d2, respectively. The thrust characteristics are as shown in FIG. Here, the maximum thrust is obtained when the tip of either one of the upper and lower portions of the core and the upper and lower corners of the plunger have the same height, that is, A in FIG. 3B or FIG. B), the point at which the thrust becomes maximum can be freely set by the axial length of the plunger and the height of the core projection.
[0019]
[Second embodiment]
A feature of the electromagnetic solenoid shown in FIG. 4 is that in the electromagnetic solenoid of the first embodiment, the guide 25 that supports the sliding of the plunger 23 is made of an insulating material such as resin molding. Thereby, the eddy current flowing through the guide portion can be eliminated, and the efficiency of the electromagnetic solenoid can be improved.
[0020]
Note that the basic configuration of the electromagnetic solenoid for a tataki massager of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. .
[0021]
[Third Embodiment]
A feature of the electromagnetic solenoid shown in FIG. 5 is that in the electromagnetic solenoid of the first embodiment, a guide for supporting sliding of the plunger 23 is integrated with the coil frame. Here, since the plunger 23 is supported by the inner diameter portion of the coil frame 24, there is a functional problem if the inner diameter dimension changes due to the temperature rise of the coil. Therefore, a material having a small thermal deformation is used as the material of the coil frame. Although it is necessary, the same effect as that of the electromagnetic solenoid according to the second embodiment can be obtained because it is made of an insulator, and the number of parts can be further reduced.
[0022]
Note that the basic configuration of the electromagnetic solenoid for a tataki massager of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. .
[0023]
[Fourth Embodiment]
The electromagnetic solenoid shown in FIG. 6 is characterized in that, in the electromagnetic solenoid of the first embodiment, the protrusion of the core 22 is formed of a flange-type member such as a cutting process, and the angle of the outer end face of the inner diameter portion of the protrusion is changed. Is 90 degrees. Here, the thrust is represented by the sum of the axial components of the electromagnetic attraction force of the two core projections, and the point at which the thrust is maximum is the tip of one of the upper and lower two projections and the vertical corner of the plunger 23. Are the same height, the angle of the outer end face of the inner diameter portion of the projection of the core 22 facing the corner of the plunger 23 on the opposite side is 90 degrees, and the maximum thrust is increased by increasing the magnetic flux density. can do.
[0024]
However, if the projection of the core is formed by drawing, the corner becomes a curved surface and the magnetic flux density becomes low. However, if it is formed by press-fitting a flange-like member by cutting, the angle of this part is 90 degrees. Can be
[0025]
Note that the basic configuration of the electromagnetic solenoid for a tataki massager of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. .
[0026]
[Fifth Embodiment]
The feature of the electromagnetic solenoid shown in FIG. 7 is that, when the plunger 23 is located at the neutral point of the magnetic force as shown in FIG. Assuming that the distances at which the upper and lower protrusions of the mold core 22 overlap each other are d1 and d2, and the lengths of the upper and lower protrusions in the axial direction are d3 and d4, respectively, the dimensions are d1 = d2, d3 = d4, d1 = 0.5 × d3. In FIG. 8, the electromagnetic attraction force is generated only at two corners of the plunger 23 opposite to the facing portions A and B of the core 22 and the plunger 23 and the corner A outside the inner diameter of the projection of the core 22. ', B'.
[0027]
Here, in FIG. 8B, the position of the plunger 23 is d3-d1 in the thrust generating portion A ', and the position of the plunger 23 in the thrust generating portion A is d2, and the thrust is maximum. Therefore, d2 = d3-d1 is required to simultaneously maximize the thrust in A and A '. Similarly, in FIG. 8C, the position of the plunger 23 is d4-d2 in the thrust generating portion B ', and the position of the plunger 23 in the thrust generating portion B is d1 at the maximum thrust. Accordingly, d1 = d4−d2 is necessary to simultaneously maximize the thrust in B and B ′. When the neutral point of the magnetic force is set at the center of the solenoid in the axial direction, it becomes vertically symmetric and d1 = d2 and d3 = d4. Therefore, the above relational expressions are d1 = 0.5 × d4 and d2 = 0.5 × d3, respectively. Become.
[0028]
Here, if the above dimensional relationship is satisfied, the neutral point of the magnetic force can be set at the center in the axial direction of the solenoid, so that the maximum electromagnetic attractive force point at A (B) and the maximum electromagnetic attractive force at A ′ (B ′) Since the points coincide, the axial thrust, which is the sum of these electromagnetic attractive forces, can be maximized.
[0029]
Note that the basic configuration of the electromagnetic solenoid for a tataki massager of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. .
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, the plunger does not stick to the stator, so that only a sliding sound does not generate an impact sound, so that noise can be reduced and no external force is applied. By setting the elastic member so that the position of the plunger is at the neutral point of the magnetic force in the state, no thrust is generated, and the noise can be significantly reduced as compared with the conventional one. The taper is not provided at the portion facing the core projection, and the rod is substantially rod-shaped, and the angle of the inner diameter side of the end surface of the core projection having a substantially C-shaped cross section and the plunger at which the electromagnetic attraction force is generated is 90 degrees. This has the effect of increasing the magnetic flux density at both ends of the plunger and increasing the electromagnetic attraction force.
[0031]
According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the eddy current flowing through the guide portion can be further eliminated, so that the efficiency of the electromagnetic solenoid can be improved. Play.
[0032]
According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, the number of parts can be further reduced.
[0033]
According to the fourth aspect of the present invention, in addition to the effect of the first aspect, the maximum thrust can be further increased by increasing the magnetic flux density by setting the angle of the outer end face of the inner diameter portion of the core projection to 90 degrees. It has the effect of being able to do it.
[0034]
According to the fifth aspect of the invention, in addition to the effect of the first aspect, the neutral point of the magnetic force can be set at the axial center of the solenoid, and the maximum electromagnetic attraction point at A or B and A Since the maximum electromagnetic attraction points at 'or B' coincide, the axial thrust, which is the sum of these electromagnetic attraction forces, can be maximized.
[Brief description of the drawings]
FIG. 1 is a view showing a configuration of an electromagnetic solenoid for a tataki massager according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a state in which a plunger is located at a neutral point of a magnetic force.
FIG. 3 is a diagram showing thrust characteristics of the electromagnetic solenoid.
FIG. 4 is a view showing a configuration of an electromagnetic solenoid for a tataki massager according to a second embodiment of the present invention.
FIG. 5 is a view showing a configuration of an electromagnetic solenoid for a tataki massager according to a third embodiment of the present invention.
FIG. 6 is a diagram illustrating a configuration of an electromagnetic solenoid for a tataki massager according to a fourth embodiment of the present invention.
FIG. 7 is a view showing a configuration of an electromagnetic solenoid for a tataki massager according to a fifth embodiment of the present invention.
FIG. 8 is a diagram showing thrust characteristics of the electromagnetic solenoid.
FIG. 9 is a view showing a configuration of a conventional electromagnetic solenoid for a tataki massager.
[Explanation of symbols]
Reference Signs List 20 attachment holder 21 connecting rod 22 core 23 plunger 24 coil frame 25 guide 26 coil 27 coil spring

Claims (5)

A plunger made of a rod-shaped magnetic material, an exciting coil surrounding the plunger in a cylindrical shape, a coil frame made of an insulator around which the exciting coil is wound, and a substantially C-shaped section surrounding the exciting coil and having a magnetic property. a core forming a magnetic flux path consists body, binds a guide for supporting the slide in the axial direction of the plunger, the attachment holder for transmitting the thrust generated by the plunger to the beating treatment section, the attachment holder and plunger An electromagnetic solenoid for a tataki massager machine, comprising: a connecting rod; and an elastic member coupled to the attachment holder and the core and holding the plunger at a neutral point of magnetic force. The electromagnetic solenoid according to claim 1, wherein the guide is made of an insulating material such as a molding material. The electromagnetic solenoid according to claim 1, wherein the guide is formed integrally with the coil frame, and supports the plunger at an inner diameter portion of the coil frame. 2. The electromagnetic solenoid for a tataki massager machine according to claim 1, wherein an angle of an outer end surface of an inner diameter portion of the core having the substantially C-shaped cross section is 90 degrees. When the plunger is located at the neutral point of the magnetic force, the distances at which the plunger and the upper and lower protrusions of the substantially C-shaped core overlap each other are d1 and d2, respectively. 2. The structure according to claim 1, wherein, when the lengths of the jars in the axial direction are d3 and d4, respectively, the dimensions satisfy a relationship of d1 = d2, d3 = d4, and d1 = 0.5 × d3. Electromagnetic solenoid for Tataki massager machine.

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