JP3971160B2 - Electromagnetic coil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a molded electromagnetic coil used for a solenoid valve or a control valve.
[0002]
[Prior art]
A conventional molded electromagnetic coil is formed by integrally molding a coil body and a connector having connection terminals. The mold body is accommodated in a can-shaped housing and fixed by caulking the upper end.
[0003]
In such an electromagnetic coil, the caulking receiving portion of the mold body is formed in a flat annular shape. Therefore, when the electromagnetic coil is mounted, for example, in an engine room of an automobile, the mold body is subjected to vibrations received over a long period of time. And the housing may rotate relative to each other.
[0004]
[Problems to be solved by the invention]
In view of the above problems, the present invention provides an electromagnetic coil mold body in which a coil itself and a connection terminal connected to the coil are integrally molded using a mold resin, and an electromagnetic coil mold body is caulked by accommodating the electromagnetic coil mold body. It is an object of the present invention to prevent mutual rotation of an electromagnetic coil mold body and a housing in an electromagnetic coil composed of a fixed housing.
[0005]
[Means for Solving the Problems]
To achieve the above object, the present invention includes an electromagnetic coil molded body molded integrally with the connection terminal connected to the coil and coil with mold resin, a cylindrical accommodating the electromagnetic coil molding member housing and Ri Do from encountering the electromagnetic coil ing to fix the electromagnetic coil mold body and the housing by caulking bending press upper edge of the housing radially inward over the entire periphery, of the housing A concave portion is provided on the upper surface of the caulking portion at the upper edge, and the back surface of the concave portion is bitten into the caulking receiving portion of the electromagnetic coil mold body .
[0006]
Furthermore, the present invention comprises an electromagnetic coil mold body in which a coil and a connection terminal connected to the coil are integrally molded using a mold resin, and a cylindrical housing that accommodates the electromagnetic coil mold body. An electromagnetic coil formed by fixing the housing and the electromagnetic coil mold body by pressing and bending the upper edge of the housing inward in the radial direction over the entire circumference, and on the periphery of the upper surface of the electromagnetic coil mold body By providing an annular protrusion and a notch on the upper edge of the housing, and pressing and crimping the upper edge of the housing radially inward, the annular protrusion of the electromagnetic coil mold body is crushed. The annular protrusion of the electromagnetic coil mold body located at the notch portion of the housing is left without being crushed .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the structure of the electromagnetic coil according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of an electromagnetic valve using the electromagnetic coil of the present invention. 2 is a cross-sectional view of a main part taken along line AA in FIG. 1 and shows the first embodiment. FIG. 3 is a main part of the electromagnetic coil part of the electromagnetic valve according to the first embodiment. It is a perspective view (A), its enlarged view (B), and sectional drawing (C). FIG. 4 is a diagram for explaining a caulking process of the electromagnetic coil shown in FIG. FIG. 5 is a diagram illustrating a caulking process of an electromagnetic coil according to another example in the first embodiment of the present invention. FIG. 6 is an exploded perspective view of the electromagnetic coil unit according to the second embodiment. FIG. 7: is the principal part perspective view (A) of the electromagnetic coil part concerning 2nd Embodiment, its enlarged view (B), and sectional drawing (C).
[0009]
As shown in FIG. 1, for example, an electromagnetic valve using an electromagnetic coil according to the present invention includes an electromagnetic coil mold body 1 in which a connector portion is integrally molded, a housing 3 that houses the electromagnetic coil mold body 1, And an electromagnetic valve portion 5.
[0010]
As shown in FIG. 1 and FIG. 2, the electromagnetic coil mold body 1 is formed by molding a coil itself 23 wound around a coil bobbin 21 and a connection terminal 18 projecting into an opening of a connector 16 with a mold resin 11. Are integrally formed. The other end of the connection terminal 18 is connected to the wire of the coil itself 23. A mold resin layer 12 is formed on the surface of the coil itself 23. A connector 16 is formed on the upper surface of the electromagnetic coil mold body 1, and a locking projection 19 that engages with a locking piece of the mating connector is provided on the surface of the connector 16. On the periphery of the upper surface of the electromagnetic coil mold body 1, a caulking receiving portion 14 protruding outward is formed.
[0011]
The coil bobbin 21 is formed of an insulating resin, and has a coil winding part 212 provided with a flange part 211 on the left and right sides and a winding core 213 having a through part provided in the center. An electromagnetic valve mechanism part (not shown) of the electromagnetic valve part 5 is inserted into the penetrating part. One flange portion 211 is provided with an electromagnetic yoke 25 in contact with the housing 3.
[0012]
The housing 3 is configured in a can shape having an opening for attaching the electromagnetic valve portion 5 to the bottom using a magnetic material. A thin caulking portion 31 is formed in the upper opening of the housing 3. After the electromagnetic coil mold body 1 is inserted into the housing 3, the caulking portion 31 is caulked to fix the housing 3 and the electromagnetic coil mold body 1.
[0013]
The configuration near the caulking portion will be described in more detail with reference to FIG. The caulking receiving portion 14 of the electromagnetic coil mold body 1 is provided with a slope 141 on the outer lower surface, and further provided with an O-ring housing space 15 below it.
[0014]
The caulking portion 31 of the housing 3 is thinly formed via the inclined portion 33 and receives the inclined surface 141 formed on the caulking receiving portion 14 of the electromagnetic coil mold body 1. The caulking part 31 is pushed and bent to caulk the upper surface of the caulking receiving part 14 of the electromagnetic coil mold body 1. Further, in the present invention, the caulking portion 31 is provided with the concave portion 32, and the concave portion is cut into the upper surface of the caulking receiving portion 14.
[0015]
A process for forming the caulking portion having such a structure will be described with reference to FIG. First, the electromagnetic coil mold body 1 is inserted into the housing 3 (FIG. 4A). At this time, the electromagnetic yoke 25 forms a closed magnetic circuit in contact with the inner wall of the housing 3. Further, a sealing O-ring 29 is fitted in the O-ring housing space 15 to ensure reliable air tightness and liquid tightness of the caulking portion.
[0016]
Next, the caulking portion 31 is pushed and bent toward the caulking receiving portion 14 to fix the electromagnetic coil mold body 1 in the housing 3 (FIG. 4B). At this time, the inclined surface 141 of the caulking receiving portion 14 is pressed against the inclined portion 33 of the housing 3 to form an airtight / liquidtight structure between the inside and the outside. In this process, the caulking and fixing structure between the electromagnetic coil mold body 1 and the housing 3 is completed. However, in the present invention, the rotation between the electromagnetic coil mold body 1 and the housing 3 is prevented by vibration applied over a long period of time. In order to prevent this, rotation prevention processing is further performed.
[0017]
Concave portions 32 are formed by using the punches 6 at several places on the upper surface of the caulking portion 31 where the caulking step is completed (FIG. 4C). The back surface of the concave portion 32 bites into the caulking receiving portion 14 of the electromagnetic coil mold body 1, and can reliably prevent the rotation between the electromagnetic coil mold body 1 and the housing 3.
[0018]
Another forming process of the caulking portion having the structure shown in FIG. 3 will be described with reference to FIG. In this forming step, as shown in FIG. 5A, a plurality of recesses 32 are formed in the vicinity of the tip of the caulking portion 31 of the housing 3 and the surface of the caulking receiving portion 14 of the electromagnetic coil mold body 1 is formed. An anti-rotation recess 142 is formed at a location corresponding to the recess 32. After accommodating the electromagnetic coil mold body 1 in the housing 3 so that the concave portion 32 and the rotation prevention concave portion 142 are aligned, the caulking portion 31 is bent inward to fix the electromagnetic coil mold body 1 in the housing 3 (FIG. 4 ( B)). In this caulking step, the protrusion formed on the back surface of the concave portion 32 is combined with the rotation preventing concave portion 142 of the caulking receiving portion 14 to reliably prevent the rotation between the electromagnetic coil mold body 1 and the housing 3. it can.
[0019]
According to this example, as compared with the example shown in FIG. 4, the punching operation for forming the recess 32 can be eliminated, and the caulking process can be simplified.
[0020]
The structure of the caulking portion according to another embodiment of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIG. 6 (A), an annular protrusion 13 is provided on the upper surface of the caulking receiving portion 14 of the electromagnetic coil mold body 1 and the housing 3 is caulked as shown in FIG. 6 (B). The feature is that a plurality of notches 35 are provided at the upper end of the portion 31.
[0021]
A configuration in which the electromagnetic coil mold body 1 is accommodated in the housing 3 and then the caulking portion 31 is caulked and fixed will be described with reference to FIG. 7A is a perspective view of a caulking portion, FIG. 7B is an enlarged perspective view of a portion indicated by a circle B in FIG. A, and FIG. 7C is a cross-sectional view of FIG. FIG. The electromagnetic coil mold body 1 provided with the annular protrusion 13 on the upper surface of the caulking receiving portion 14 is accommodated in the housing 3 provided with a plurality of notches 35 at the upper end of the caulking portion 31, and then the caulking portion 31 is bent inward to electromagnetically. The coil mold body 1 is fixed. At this time, the annular protrusion 13 is crushed by the caulking portion 31 and the electromagnetic coil mold body 1 is fixed to the housing 3, but the annular protrusion 13 located at the notch 35 portion remains uncrushed and functions as a rotation preventing member.
[0022]
According to this embodiment, as compared with the example shown in FIG. 5, the alignment of the concave portion 32 and the rotation preventing concave portion 142 becomes unnecessary, and the caulking process can be simplified.
[0023]
【The invention's effect】
According to the present invention, the electromagnetic coil mold body 1 is housed in the housing 3 by housing the electromagnetic coil mold body 1 in the housing 3, caulking and fixing the caulking portion 31 of the housing 3 and providing an anti-rotation structure. The rotation of 1 can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a front view for explaining the shape of an electromagnetic valve using an electromagnetic coil according to the present invention.
FIG. 2 is a cross-sectional view of the main part of the electromagnetic coil taken along line AA in FIG.
3 is a perspective view (A), an enlarged perspective view (B), and a cross-sectional view (C) illustrating the configuration of the electromagnetic coil shown in FIG. 2. FIG.
FIG. 4 is a cross-sectional view illustrating a caulking process of an electromagnetic coil according to the present invention.
FIG. 5 is a cross-sectional view for explaining another caulking process of the electromagnetic coil of the present invention.
FIG. 6 is an exploded perspective view illustrating the configuration of an electromagnetic coil according to a second embodiment of the present invention.
7 is a perspective view (A), an enlarged perspective view (B), and a cross-sectional view (C) for explaining the configuration of the electromagnetic coil shown in FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electromagnetic coil mold body 11 Mold resin 12 Mold resin layer 13 Annular protrusion 14 Caulking receiving part 141 Slope 142 Anti-rotation recessed part 15 O-ring accommodating space 16 Connector 18 Connection terminal 19 Locking protrusion 21 Coil bobbin 211 ridge part 212 Coil winding part 213 Winding core 23 Coil itself 25 Electromagnetic yoke 29 Sealed O-ring 31 Caulking portion 32 Recessed portion 33 Inclined portion 35 Notch 5 Electromagnetic valve portion 6 Punch

Claims (2)

An electromagnetic coil molded body molded integrally with the connection terminal connected coils and the coil with a molding resin, the Ri Do and a cylindrical housing for accommodating the electromagnetic coil mold body, the upper edge of the housing met electromagnetic coil ing to fix the electromagnetic coil mold body and the housing by caulking bending press radially inward around the entire circumference,
An electromagnetic coil, wherein a concave portion is provided on an upper surface of a caulking portion at an upper edge of the housing , and a rear surface of the concave portion is bitten into a caulking receiving portion of the electromagnetic coil mold body . An electromagnetic coil mold body in which a coil and a connection terminal connected to the coil are integrally molded using a mold resin, and a cylindrical housing that accommodates the electromagnetic coil mold body, and the upper edge of the housing is entirely An electromagnetic coil formed by fixing the housing and the electromagnetic coil mold body by pressing and bending radially inward over the circumference,
By providing an annular protrusion on the peripheral edge of the upper surface of the electromagnetic coil mold body, providing a notch on the upper edge of the housing, and pushing and bending the upper edge of the housing radially inward, the electromagnetic coil mold An electromagnetic coil, wherein an annular protrusion of a body is crushed, but an annular protrusion of the electromagnetic coil mold body located at a notch portion of the housing remains without being crushed .

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