JPH0945525A - Electromagnet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electromagnet device by which a sufficient damping characteristic is obtained by a method wherein a core is molded integrally with a coil bobbin. SOLUTION: An electromagnet device 20 is provided with a coil bobbin 21, a coil 22, a core 23, a yoke 24, a moving frame (a moving member) 25, an armature 26 and a permanent magnet 27. The coil bobbin 21 comprises flange parts 12b at both ends of a winding trunk part, and the coil 22 is wound on the winding trunk part. The core 23 is molded integrally with the coil bobbin 21 so as to pass the winding trunk part. A contact part comprises a contact face which forms nearly the same face as a magnetic pole face 23a at the core 23 so as to come into contact with a contact pole face at the armature 26 when the moving frame 25 is turned together with the armature 26. In addition, a groove part between the contact face and the magnetic pole face 23a at the core 23 is formed in the contact part. Thereby, the positioning of the core which passes the coil bobbin is hardly irregular, and a sufficient damping characteristic can be obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to household electric appliances,
The present invention relates to an electromagnet device having a damper applied to an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, as an electromagnet device of this type, FIG.
14 to 14 are available. In this device, the chambers B ₁ and C ₁ are formed on both sides of the substrate A by the sheets B and C that cover both ends of the through hole A ₁ formed in the substrate A, and one chamber B ₁ or C ₁ is pressed. Then, the damper E in which the fluid D is hermetically sealed so that it can move to the other chamber C ₁ or B ₁ through the through hole A ₁ of the substrate A and the substrate A of the damper E are integrally provided. Resin coil bobbin F, coil G wound around coil bobbin F, and iron core H that penetrates coil bobbin F
And the armature J, which has an armature surface that is attracted and separated from the magnetic pole surface H ₁ of the iron core H depending on the excitation state of the coil G, and the armature J that moves with the armature J to press the chambers B ₁ and C ₁ of the damper. And a movable member K provided with the portions K ₁ and K ₁ .

More specifically, the sheets B and C have peripheral edges B ₂ and C.
_{It is} made of elastic rubber provided with ridges B ₃ and C ₃ that circulate around ₂ , and its peripheral edges B ₂ and C ₂ are sandwiched between the substrate A by the sandwiching member L, and the fluid D is absorbed. It is tightly sealed.

According to the excitation state of the coil G wound around the coil bobbin F, the contact surface of the armature J is attracted and separated from the magnetic pole surface H ₁ of the iron core H penetrating the coil bobbin F,
The movable member K moves together with the armature J. At this time, the pressing portion K ₁ provided on the movable member K is moved to one chamber B _{1 of the} damper E.
Alternatively, C ₁ is pressed so that the fluid D moves through the through hole A ₁ of the substrate A to the other chamber C ₁ or B ₁ . Then, the moving speed of the fluid D of the damper E is reduced due to the resistance during movement, so that the collision speed and impact force of the movable member K can be reduced, that is, the damping characteristic can be obtained, so that household electric appliances and automobiles can be obtained. It is suitable for use in applications where it is desired to minimize the collision sound and vibration of the.

[0005]

In the conventional device described above, the damper E is such that the substrate A is the coil bobbin F.
Since it is formed integrally with the above, variations in relative positional relationship are reduced, and dimensional accuracy between the pressed portions of the sheets B and C and the pressing portion K ₁ of the movable member K is improved. The sheets B and C of the damper E are pressed accurately, and stable damping characteristics can be obtained.

However, in the above-mentioned conventional one, the relative positioning between the magnetic pole surface H ₁ of the iron core H and the armature surface of the armature J is caused by the variation in the positioning of the iron core H penetrating the coil bobbin F. If the relative positional relationship varies, the movement of the movable member K that moves together with the armature J also varies, and as a result, the pressing portion K ₁ of the movable member K and the seat B of the damper E,
Even the relative positional relationship with C may vary, and sufficient damping characteristics may not be obtained.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnet device capable of obtaining sufficient damping characteristics.

[0008]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a chamber is formed on both sides of the substrate by a sheet covering both ends of a through hole formed in the substrate. A damper in which a fluid is hermetically sealed so that it can move to the other chamber through the through hole of the substrate when pressed in one chamber, a resin coil bobbin integrally provided with the substrate of the damper, and a coil bobbin The coil wound around, the iron core that penetrates the coil bobbin, the armature that has the armature surface that is attracted and separated from the magnetic pole surface of the iron core depending on the excitation state of the coil, and the armature that moves together to move the damper chamber. In the electromagnet device including a movable member provided with a pressing portion for pressing, the iron core is formed integrally with the coil bobbin.

According to a second aspect of the present invention, in the first aspect of the present invention, the abutment has an abutment surface that is substantially flush with the magnetic pole surface of the iron core so as to abut the armature surface of the armature. The part is integrally provided with the coil bobbin.

According to a third aspect of the present invention, in the second aspect, when the armature surface of the armature and the magnetic pole surface of the iron core come into contact with each other, the armature surface of the armature and the magnetic pole surface of the armature are contacted with each other. A gap is provided between the contact portion and the contact surface.

According to a fourth aspect of the present invention, in the second aspect, the coil bobbin has a structure in which a groove is provided between the contact surface of the contact portion and the magnetic pole surface of the iron core. is there.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This electromagnet device includes a damper 10 and an electromagnet section 20.

First, the damper 10 will be described. The damper 10 includes a substrate 1, sheets 2 and 3, a fluid 4 and a holding member 5.
Is formed.

The substrate 1 is integrally formed of a resin material such as PBT and ABS together with a flange portion 21b of the coil bobbin 21 of the electromagnet portion 20 which will be described later in a substantially flat plate shape.
The substrate 1 is provided with a through hole 1a having a diameter of 0.5 mm, for example.

The sheets 2 and 3 are formed of silicon rubber or the like into a hemispherical dome shape having a two-stage cross-sectional area toward the substrate 1. Circular ridges 2a and 3a are formed on the peripheral portions 2b and 3b, respectively. It is provided. The sheets 2 and 3 cover the both ends of the through hole 1a, and have a first chamber 2c and a second chamber 3c that are hermetically sealed with a viscous fluid 4 such as fluorine grease on both sides of the substrate 1, respectively. Is forming. The procedure for hermetically sealing the fluid 4 will be described later in detail.

The holding member 5 is made of the same material as the substrate 1,
It is formed into a substantially flat plate, and the first chamber of the seats 2 and 3 is in the center.
An accommodation hole for accommodating the 2c and the second chamber 3c is provided.

Next, a method of manufacturing the damper 10 will be described with reference to FIG. First, as shown in FIG. 3A, an appropriate amount of fluid 4 is injected into the dome-shaped sheets 2 and 3 using a dispenser or the like. Next, as shown in FIG. 2B, the first chamber 2c is formed by the sheet 2 on one surface of the substrate 1 covering both ends of the through hole 1a, and the sheet 2 is pressed in contact with the ridge 2a. The substrate 1 and the sandwiching member 5 are joined by ultrasonic welding so as to sandwich the substrate in an airtight manner. Next, the same figure (c)
As shown in, the other side of the substrate 1 is also formed with the sheet 3 to form the second chamber 3c, and the substrate 1 and the holding member 5 are joined by ultrasonic welding. In this state, the first chamber 2c and the second chamber 3c are filled with air together with the fluid 4. Next, the same figure
As shown in (d), if this air is left under a reduced pressure in a sealed state, it is degassed through silicon rubber having a high gas permeability, and the fluid 4 is hermetically sealed. At this time, since the fluid 4 made of fluorine grease or the like has a relatively high boiling point, it hardly penetrates the silicone rubber and leaks to the outside.

Next, the electromagnet section 20 will be described. The electromagnet device 20 includes a coil bobbin 21, a coil 22, an iron core 23,
Yoke 24, movable frame (movable member) 25, armature 26, permanent magnet
Equipped with 27. The coil bobbin 21 has flanges 21b at both ends of the winding body 21a, and the coil 22 is wound around the winding body 21a. The iron core 23 is integrally formed with the coil bobbin 21 so as to pass through the winding drum portion 21a, and has a magnetic pole surface 23a at one projecting end thereof. The yoke 24 has an iron core 23 at one end thereof.
The magnetic pole surface 24a faces the magnetic pole surface 23a, and the other end is connected to the other end of the iron core 23. The movable frame (movable member) 25 is provided with a support portion 25a rotatably supported by a support shaft 24b protruding from the yoke 24, and holds an armature 26 and a permanent magnet 27. The movable frame 25 is provided with an insertion hole 25b through which the damper 10 integrally formed with the flange portion 21b of the coil bobbin 21 is inserted, and the movable frame 25 and the armature 26 are inserted from the opening end surface of the insertion hole 25b. Pressing parts 25c, 25c for rotating and pressing the seats 2, 3 of the damper 10 are extended. The armature 26 is located between the iron core 23 and the yoke 24, the surface of the iron core 23 facing the magnetic pole surface 23a is the armature surface 26a, and the surface of the yoke 24 facing the magnetic pole surface 24a is the armature surface 26b. Has become. The armature 26 controls the excitation of the coil 22 so that the armature faces 26a and 26b are attracted and separated from the pole faces 23a and 24a, respectively.

Next, the operation of the damper 10 will be described with reference to the example shown in FIG. In the figure (a), one pressing part 25c is in contact with one first chamber 2c of the damper,
When 22 is energized, as shown in (b) of the figure, the other pressing part
25c collides against the other second chamber 3c of the damper 10 and presses it.
As shown in (c) of the figure, the fluid 4 in the second chamber 3c is filled with the through hole 1a.
To the first room 2c on the other hand. Then, the pressing part
The moving speed of 25c, 25c is reduced by the resistance generated when the viscous fluid 4 moves, and the shock when the armature 26 collides with the iron core 23 or the magnetic pole surfaces 23a, 24a of the yoke 24 is alleviated. When the coil 22 is energized in the opposite direction, it operates in the reverse order to the state shown in FIG. 2 (d) and then returns to the state shown in FIG. 2 (a) .At this time, the armature 26 is also moved by the damper 10. Iron core
The impact when colliding with the magnetic pole surfaces 23a, 24a of the yoke 23 or the yoke 24 is mitigated.

In such an electromagnet device, the damper 10
Since not only the substrate 1 of the coil bobbin 21 but also the iron core 23 of the electromagnet part 20 are integrally formed with the coil bobbin 21,
Positioning of the iron core 23 penetrating the 21 is less likely to vary,
Unlike the conventional example, the relative positional relationship between the pressing portion 25c of the movable member and the seats 2 and 3 of the damper 10 does not fluctuate, and sufficient damping characteristics can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described below based on No. 10. The members having substantially the same functions as those of the first embodiment are denoted by the same reference numerals,
Only different points from the first embodiment will be described.

In the first embodiment, the collar portion of the coil bobbin 21.
While the substrate 1 and the iron core 23 of the damper 10 that are integrally molded are projected from the 21b, in the present embodiment, the contact portion is formed along the substrate 1 and the iron core 23 of the damper 10.
21c is integrally formed to have a protruding shape.

Specifically, the contact portion 21c is substantially flush with the magnetic pole surface 23a of the iron core 23 so as to contact the armature surface 26a of the armature 26 when the movable frame 25 rotates together with the armature 26. Has a contact surface 21d.

Next, the operation of this device will be described with reference to FIG. When the armature 26 is attracted to the iron core 23, the armature
The movable frame 25 moves together with 26, and the pressing portion 25c moves to the damper 10
The seats 2 and 3 of the damper 10 are pressed, but immediately before the pressing portion 25c presses the seats 2 and 3 of the damper 10, that is, the dampers.
Immediately before the damping characteristic of 10 begins to work, since the pressing portion 25c is located at the end of the movable frame 25, as shown in FIG.
The armature 26 is inclined, and the armature surface 26a of the armature 26 is
The contact surface 21d of the contact portion 21c is formed before the magnetic pole surface 23a of the iron core 23.
To contact the damper 10, and the pressing part 25c eventually becomes
When the sheets 2 and 3 are pressed to start the damping characteristic, the inclination of the armature 26 is restored, and the armature surface 26a and the magnetic pole surface 23a of the iron core 23 come into contact with each other. At this time, armature
There is a slight space S between the contact surface 26a of 26 and the contact surface 21d of the contact portion 21c.

In such an electromagnet device, in addition to the effects of the first embodiment, the movable frame 25 that moves together with the armature 26 is tilted so that the pressing portion 25c provided on the movable frame 25 is sufficient for the damper 10. Even if the first and second chambers 2c and 3c cannot be pressed and the moving speed is not sufficiently reduced, the armature
The armature surface 26a of the armature 26 is first contacted with the contact surface 21d of the contact portion 21c which is integrally formed with the coil bobbin 21 made of a resin material. No longer makes the noise of when the

Since the armature 26 is inclined, the armature surface 26a of the armature 26 comes into contact with the contact surface 21d of the contact portion 21c before the magnetic pole surface 23a of the iron core 23. When the contact surface 26a of the pole 26 contacts the magnetic pole surface 23a of the iron core 23,
Since the armature surface 26a of the armature 26 and the contact surface 21d of the contact portion 21c face each other through the air gap S, the armature surface 26a of the armature 26 surely contacts the magnetic pole surface 23a of the iron core 23. Sucked.

Next, a third embodiment of the present invention will be described below with reference to FIG. It should be noted that members having substantially the same functions as those in the second embodiment are designated by the same reference numerals, and only different points from the second embodiment will be described.

In the second embodiment, the contact surface 21d of the contact portion 21 of the coil bobbin 21 and the magnetic pole surface 23a of the iron core 23 are substantially continuous, whereas in the present embodiment, the contact surface 21d is A groove portion 21e between the iron core 23 and the magnetic pole surface 23a is provided in the contact portion 21c.

In such an electromagnet device, in addition to the effect of the second embodiment, a molten molding material that may become a burr in the case of integral molding can be formed on the contact surface 21d of the contact portion 21c and the iron. By flowing so as to fill the groove 21e provided between the core 23 and the magnetic pole surface 23a, the molding material does not adhere to the surface of the iron core 23, and the magnetic pole surface 23a of the iron core 23 and the armature 26 The attraction / separation from the armature surface 26a is not affected, and variations in electromagnet characteristics do not occur.

In both the second and third embodiments, when the armature surface 26a of the armature 26 and the magnetic pole surface 23a of the iron core 23 come into contact with each other, the armature surface 26a of the armature 26 is contacted with the armature surface 26a. Although there is a slight gap S between the contact surface 21d of the contact portion 21c and the contact surface 21d, for example, the contact surface 26a of the armature 26 and the magnetic pole surface 23 of the iron core 23.
Even when there is a gap between a and a, if the electromagnet portion 20 has a large attraction force and can be sufficiently attracted, the gap S is provided between the contact surface 26a and the contact surface 21d. It may not be necessary, in which case the design accuracy can be lowered.

[0031]

According to the first aspect of the present invention, not only the substrate of the damper but also the iron core are formed integrally with the coil bobbin. Therefore, the positioning of the iron core penetrating the coil bobbin is less likely to vary, and the conventional example As described above, the relative positional relationship between the pressing portion of the movable member and the seat of the damper does not vary, and sufficient damping characteristics can be obtained.

According to a second aspect of the invention, in addition to the effect of the first aspect, the movable member movable together with the armature is inclined, and the pressing portion provided on the movable member can sufficiently press the chamber of the damper. Even if the movable speed is no longer reduced and the movable speed is not sufficiently reduced, the contact surface of the armature comes into contact with the contact surface of the contact portion that is generally provided integrally with the coil bobbin made of resin material. , The noise as when the metal members such as the armature and the iron core contact each other does not occur.

According to a third aspect of the present invention, in addition to the effect of the second aspect, a molten molding material that may become a burr when integrally molded is also used as the contact surface of the contact portion and the iron core. By flowing in so as to fill the groove provided between the magnetic pole surface of the iron core and the magnetic pole surface, the molding material does not adhere to the surface of the iron core, and the gap between the magnetic pole surface of the iron core and the armature surface of the armature is eliminated. The attraction and separation will not be hindered, and variations in electromagnet characteristics will not occur.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the above coil bobbin.

FIG. 3 is a perspective view of the same damper.

FIG. 4 is a cross-sectional view of the same damper.

FIG. 5 is a cross-sectional view showing a manufacturing process of the above damper.

FIG. 6 is a cross-sectional view showing a state in which the above-mentioned damper is pressed by a pressing portion.

FIG. 7 is a cross-sectional view showing a state in which the armature of the above contacts the iron core.

FIG. 8 is a perspective view of a second embodiment of the present invention.

FIG. 9 is a perspective view of the above coil bobbin.

FIG. 10 is a cross-sectional view showing a state in which the above armature contacts the contact portion.

FIG. 11 is a cross-sectional view showing a groove portion between a contact portion and an iron core according to the third embodiment of the present invention.

FIG. 12 is a perspective view of a conventional example.

FIG. 13 is a perspective view of the above coil bobbin.

FIG. 14 is a cross-sectional view of the same damper.

[Explanation of symbols]

 1 Substrate 1a Through hole 2 Seat 2c First chamber 3 Seat 3c Second chamber 4 Fluid 10 Damper 21 Coil bobbin 21c Contact part 21d Contact surface 21e Groove part 22 Coil 23 Iron core 23a Magnetic pole surface 25 Movable frame (movable member) 25c Press Part 26 Armature 26a Armature surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuyasu Kawamoto 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (3)

[Claims] 1. A sheet covering both ends of a through hole formed in a substrate forms a chamber on both sides of the substrate, and when one chamber is pressed, it moves through the through hole of the substrate to the other chamber. A damper in which a fluid is hermetically sealed so that a fluid is obtained, a resin coil bobbin integrally provided with a substrate of the damper, a coil wound around the coil bobbin, an iron core penetrating the coil bobbin, and an exciting state of the coil. An electromagnet device comprising: an armature having an armature surface that is attracted and separated from a magnetic pole surface of an iron core; and a movable member that is provided with a pressing portion that moves together with the armature to press the chamber of the damper. The core is formed integrally with the coil bobbin. 2. An abutting portion having an abutting surface that is substantially flush with the magnetic pole surface of the iron core so as to abut the armature surface of the armature is integrally provided with the coil bobbin. The electromagnet device according to claim 1. 3. The electromagnet device according to claim 2, wherein the coil bobbin is provided with a groove portion between a contact surface of the contact portion and a magnetic pole surface of the iron core.