JP2002353027A - Solenoid device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid device which enables miniaturization and can be recycled. SOLUTION: In the solenoid device 10, a wind bobbin 20, having a coil 11 wound on the outer periphery of a bobbin portion 21, is so mounted in a casing 30 of an independent body as to attach a metal cylinder 12 to the outer periphery of the casing 30. Thereby, the outer periphery of the coil 11 is covered with a cylinder portion 31, and the periphery of a terminal 15 is also covered and concealed with a connector housing 32. Since the periphery of the coil 11 of the solenoid device 10 is covered with the casing 30 of an independently formed body, the wall thickness of the casing 30 is made smaller than the conventional molded casings so as to make reducible the size of the solenoid device 10. Further, since resin will not penetrate into the spaces between the wires of the coil 11 differently from the conventional molded casings, the decomposition of the solenoid device for its recycling is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid device provided with a casing for covering an outer periphery of a coil wound around a bobbin.

[0002]

2. Description of the Related Art Conventionally, as this type of solenoid device,
Japanese Unexamined Patent Application Publication No. 11-30738211 discloses an example. In this case, an integral covering portion is formed by molding in order to cover the outer periphery of the coil wound around the bobbin. However, the winding of the electric wire around the bobbin is not always performed uniformly,
A raised part may be generated in a part of the coil. In addition, the electric wire may be pressed by the injection pressure of the resin that acts when the covering portion is formed, and a raised portion may be generated. When such a situation occurs, there is a concern that the electric wire may be exposed at the raised portion of the coil. Therefore, conventionally, in consideration of such a situation, the thickness of the covering portion is set to be relatively large in advance.

[0003]

However, increasing the thickness of the mold corresponding to the above-mentioned raised portion causes an increase in the size of the entire solenoid device. Furthermore, when the casing is formed by molding, the resin enters the gap between the windings, so that the disassembly is poor,
There was also a problem that reuse was extremely difficult. The present invention has been completed based on the above circumstances, and has an object to provide a solenoid device that can be reduced in size and can be reused.

[0004]

According to a first aspect of the present invention, there is provided a wound bobbin in which a coil is wound around a bobbin, and a bobbin formed separately from the wound bobbin. The coil bobbin in the winding bobbin has a characteristic that the coil bobbin is assembled along an axis so as to cover the outer periphery of the coil.

According to a second aspect of the present invention, in the first aspect, the coil is drawn out to both ends of the coil radially outward of the winding bobbin, and a terminal is connected to the drawn portion. A feature is that a connector housing capable of accommodating the terminal is integrally formed on the outer surface of the casing as the winding bobbin is incorporated into the casing.

According to a third aspect of the present invention, in the first or second aspect, a support portion for supporting the terminal is formed at the axial end of the winding bobbin so as to stand radially outward. On the other hand, the casing is characterized in that it is formed so as to be incorporated along the axis from the end on the side where the support portion is not provided to the winding bobbin.

[0007]

According to the construction in which the winding bobbin is covered with a separate casing, even if a bulging portion is formed in a part of the coil, the winding of the coil can be performed with the casing. By mounting the winding bobbin while holding down the outer circumference, it is possible to correct the swelling portion of the coil. Thereby, it is not necessary to consider the swelling of the coil, and the casing can be made thin, so that the solenoid device can be downsized. Furthermore, if the casing is a separate one, the resin does not enter the gap between the windings unlike the case of the conventional molding, so that the disassembly is good and the reuse is easy.

<Invention of Claim 2> Since the connector housing accommodating the terminals can be assembled with the assembly of the casing to the winding bobbin, workability in assembling the solenoid device is improved.

<Invention of Claim 3> At the time of assembling the casing, it is possible to avoid interference between the casing and the supporting portion for supporting the terminal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the solenoid device 10 is
And a casing 30.

The wound bobbin 20 is formed of a synthetic resin bobbin 21 having a cylindrical shape and flanges 23 protruding at both ends, and a coil 1 wound around the bobbin 21.
1 (see FIG. 1). The coil 11 is wound around an electric wire so that the outer periphery does not protrude beyond the outer diameter of the flange portion 23 of the bobbin portion 21.

A terminal support 22 is provided integrally with the flange 23R on one side (the right side in FIG. 1) of the bobbin 21 radially outward of the bobbin 21. The terminal support portion 22 extends in a hook shape from the flange portion 23R, and a pair of terminals 15, 15 to which both ends of the electric wire of the coil 11 are connected are provided in parallel at the upper end portion (FIG. 2). , 3
reference). The terminal 15 is a male type having an electric wire connecting portion 17 formed behind the tab portion 16, and one of the pair of terminals 15, 15 with one electric wire connecting portion 17 directed upward while projecting the tab portion 16 forward. The other wire connection portion 17 is integrally supported by the terminal support portion 22 so as to face downward.

A support piece 22T for supporting the terminal 15 protrudes forward from the upper end of the terminal support portion 22. Further, a projecting wall 26 is provided on the upper surface of the terminal supporting portion 22 behind the wire connecting portion 17 facing upward. The lower side of the support piece 22T is open in the left-right direction in FIG. This is necessary for performing the welding work between the terminal 15 and the lead wire of the coil 11 as described below. In the present embodiment, the wire connection portions 17, 17 of the adjacent terminals 15, 15 are arranged alternately up and down, and the lower side of the support piece 22T is open in the left-right direction in FIG. The left and right directions of the parts 17, 17 are open. Thereby, each electric wire connection part 1
It becomes possible to perform welding by approaching the welding device for connecting the electric wire connection portion 17 and the electric wire of the coil 11 to the wires 7 and 17 from both sides of the electric wire connection portion 17 (left and right sides in FIG. 3). I have.

The wound bobbin 20 is connected to a terminal support 22.
Flange 2 on the opposite side (left side in FIG. 1) to the side provided with
An annular positioning projection 24 is provided on the end face on the 3F side. When the winding bobbin 20 is inserted into the casing 30 described later from the positioning projection 24 side, the locking projection 25 is engaged with the casing 30 to fix the casing 30. The three locking projections 25 are arranged on the outer peripheral surface of the flange portion 23R at equal intervals in the circumferential direction, and one locking projection is also provided near the center of the upper end surface of the terminal support portion 22. Protrusion 25
Are arranged.

The casing 30 is made of a synthetic resin, and is integrally provided with a tubular portion 31 and a connector housing 32. The cylindrical portion 31 has a cylindrical shape and is open at both ends in the axial direction, so that the above-described wound bobbin 20 can be accommodated inward. Tube part 31
Is formed so that its inner diameter is equal to the outer diameter of the flange portion 23 of the winding bobbin 20, and the entire length can be covered over both flange portions 23 of the bobbin portion 21. One open end of the cylindrical portion 31 (the right side in FIG. 1) is opened with a diameter equal to the outer diameter of the flange portion 23 to form an insertion opening 31A for inserting the winding bobbin 20, and is formed at an opening end of the insertion opening 31A. In the figure, three locking holes 37 into which the locking projections 25 of the flange 23 are fitted are formed at equal intervals in the circumferential direction. In addition, a disc-shaped stopper 3
3 is provided so as to protrude inward in the radial direction.

The connector housing 32 has a substantially rectangular cylindrical shape, and is provided to be spaced radially outward of the cylindrical portion 31 from an end of the cylindrical portion 31 on the side of the insertion opening 31A. In the connector housing 32, a hood portion 34 opening to the stopper 33 side and a terminal accommodating portion 36 opening to the insertion opening 31A side are formed, and a partition wall 35 is provided at a boundary between the hood portion 34 and the terminal accommodating portion 36. Is provided. The terminal accommodating portion 36 has a substantially rectangular cylindrical shape capable of accommodating the terminal supporting portion 22 and has an opening on the cylindrical portion 31 side.
A concave portion 36A for fitting the two projecting walls 26 is formed. Further, a tab insertion hole 35A for penetrating the tab portion 16 of the terminal 15 is formed at substantially the center of the partition wall 35 at two locations corresponding to the terminals. A locking hole 37 into which the locking projection 25 of the terminal support 22 is fitted is formed in the ceiling wall of the terminal housing 36.

As shown in FIG. 7, when the casing 30 is assembled to the winding bobbin 20, the opening of the stopper 33 and the positioning projection 24 of the flange 23 are fitted to each other.
The cylindrical portion 31 and the bobbin portion 21 are aligned with each other, and the insertion operation of the wound bobbin 20 to the back is restricted.
Further, the engagement between the locking projection 25 and the locking hole 37 restricts the removal of the casing 30 and the winding bobbin 20. The outer periphery of the coil 11 is covered and covered by the tubular portion 31, and the terminal 15 is covered by the connector housing 32.
Cover the outer circumference of the. The winding bobbin 20 and the casing 3
After assembling, the metal cylinder 12 for magnetic circuit formation is attached so as to cover the outer periphery of the cylindrical portion of the casing 30 (see FIG. 7).

Subsequently, the solenoid device 10 of the present embodiment
Will be described. First, a winding bobbin 20 in which the coil 11 is wound around the outer periphery of the bobbin portion 21 is prepared (see FIG. 1). Then, the winding bobbin 20 is inserted into the insertion opening 31A of the casing 30 from the positioning projection 24 side. At this time, the tab 16 of the terminal 15 is inserted into the tab insertion hole 3.
The wound bobbin 20 is inserted deep into the casing 30 while being inserted through 5A. When the terminal support portion 22 is inserted into the terminal accommodating portion 36 of the connector housing 32, the insertion operation can be guided by fitting the protruding wall 26 into the concave portion 36A. Further, the winding bobbin 20 is inserted into the back of the casing 30, and the locking projection 25 is locked to the locking hole 37 while the positioning projection 24 is fitted to the stopper 33. As a result, the assembly of the winding bobbin 20 and the casing 30 is completed, and the outer periphery of the coil 11 can be covered with the cylindrical portion 31 so as to cover the entire periphery, and the periphery of the terminal 15 can be covered and concealed with the connector housing 32.
At this time, the electric wire connection part 17 is
Is closed when the protruding wall 26 fits into the concave portion 36A (see FIG. 10). After that, the casing 30
By assembling the metal cylinder 12 around the outer periphery of the device (see FIG. 2).

As described above, according to the solenoid device 10 of the present embodiment, the periphery of the coil 11 is covered by the casing 30 formed separately. Thus, it is not necessary to increase the thickness in advance to cover the raised portion of the coil as in the conventional case, and the thickness of the casing 30 can be reduced and the solenoid device 10 can be downsized.

Further, even if the outer diameter of the coil 11 mounted on the winding bobbin 20 is slightly varied, the coil 1
By mounting the winding bobbin 20 while pressing the outer periphery of the coil 1, variation in the outer diameter of the coil 11 can be corrected.

Further, the casing 3 previously formed separately is
If 0 is used, the resin does not enter between the electric wires of the coil unlike the molding, so that the disassembly for reuse is easy.

In the conventional method, the bobbin is formed once, then the coil is mounted on the bobbin, and the bobbin is inserted into the mold again to perform the molding, and the forming process and the assembling process are alternately mixed. On the other hand, in the present embodiment, the bobbin 21 and the casing 30 need only be separately molded and assembled with each finished product. That is, since the molding process and the assembly process are separated, Excellent productivity.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. The solenoid device 10A of the present embodiment differs from the first embodiment in the direction in which the wound bobbin 20 is inserted into the casing 30, and the structure is changed accordingly.
Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

The casing 30 has a relief groove 31S formed in the upper end surface of the cylindrical portion 31 along the axial direction of the cylindrical portion 31 over the entire length of the cylindrical portion 31. The relief groove 31S is formed to have the same width as the connecting portion between the terminal support portion 22 and the flange 23R, and is for preventing interference with this portion.
In the cylindrical portion 31, the insertion hole 31A and the locking hole 37 are provided on the left side in FIG.
Reference numeral 3 is provided on the right side of FIG. The connector housing 32 has a structure in which the hood portion 34 and the terminal accommodating portion 36 are connected, and is closed rightward in FIG. Also,
The partition wall 35 is formed on the terminal support 22. further,
In the present embodiment, the electric wire connection portion 17 of the terminal 15 performs welding by approaching a welding tool from above and below.

In the present embodiment, the winding bobbin 20 is inserted into the casing 30 from the right side in FIG. Then, the metal tube 12 is assembled from the left side of FIG. 11 (see FIG. 15). The solenoid device according to the present embodiment configured as described above has the same effects as those of the first embodiment.

<Other Embodiments> The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the bobbin 21 and the terminal support 22 made of synthetic resin are directly adhered to the casing 30 made of synthetic resin. A seal member such as rubber may be interposed between them. (2) In the above embodiment, the terminal 15 is a male type, but may be a female type.

[Brief description of the drawings]

FIG. 1 is an exploded longitudinal sectional view of a first embodiment of the present invention.

FIG. 2 is an exploded plan view thereof.

FIG. 3 is a front view of a wound bobbin.

FIG. 4 is a rear view thereof.

FIG. 5 is a front view of a casing.

FIG. 6 is a rear view thereof.

FIG. 7 is a longitudinal sectional view of a solenoid device.

FIG. 8 is a plan view thereof.

FIG. 9 is a front view thereof.

FIG. 10 is a rear view thereof.

FIG. 11 is an exploded longitudinal sectional view of the second embodiment.

FIG. 12 is an exploded plan view thereof.

FIG. 13 is a front view of a casing.

FIG. 14 is a front view of a wound bobbin.

FIG. 15 is a longitudinal sectional view of a solenoid device.

FIG. 16 is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Solenoid device 11 ... Coil 15 ... Terminal 20 ... Winding bobbin 21 ... Bobbin part 22 ... Terminal support part (support part) 30 ... Casing 32 ... Connector housing

Claims (3)

[Claims] A winding bobbin in which a coil is wound around the bobbin; and a winding bobbin formed separately from the winding bobbin in a cylindrical shape, and a winding portion of the coil in the winding bobbin is incorporated along an axis so that the coil is wound. A solenoid device comprising a casing capable of covering an outer periphery of a coil. 2. The coil bobbin is drawn out radially outward from both ends of the coil, and a terminal is connected to the drawn portion. The winding bobbin is incorporated into the casing on an outer surface of the casing. 2. The solenoid device according to claim 1, wherein a connector housing capable of accommodating the terminal is integrally formed. 3. A supporting portion for supporting the terminal is formed at an end of the winding bobbin in the axial direction to stand radially outward, and the casing is provided with the supporting portion for the winding bobbin. The solenoid device according to claim 1, wherein the solenoid device is formed so as to be installed along an axis from an end on a side not provided.