JP2010219123A - Coil device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil device which can reduce cost while protecting a connection part of a lead wire and terminal metal fitting. <P>SOLUTION: The coil device 10 includes a coil 12 formed by winding a winding wire 11 on a bobbin 20, and the terminal metal fitting 30 connected to the lead wire 13 which is drawn from the coil 12. A connector part 23 on which the terminal metal fitting 30 is supported is formed integrally with the bobbin 20. A cover 40 for covering the connection part of the lead wire 13 and terminal metal fitting 30 is mounted on the connector part 23. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a coil device.

  Conventionally, a coil device having a coil in which a winding is wound around a bobbin is known (see, for example, Patent Document 1). This coil device has a terminal fitting connected to a lead wire drawn out from the coil, and a connector portion for housing the terminal fitting is provided integrally with the bobbin. The coil device is manufactured by housing the terminal fitting in the connector portion, connecting the lead wire and the terminal fitting, and then forming an exterior portion around the coil and the connector portion by molding. This exterior portion protects the connection portion between the lead wire and the terminal metal fitting exposed to the outside.

JP 2004-247604 A

  However, as described above, since it is expensive to mold the exterior portion, there has been a demand for cost reduction while protecting the connecting portion between the lead wire and the terminal fitting.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a coil device capable of reducing the cost while protecting the connecting portion between the lead wire and the terminal fitting. .

The coil device of the present invention includes a coil in which a winding is wound around a bobbin, and a terminal fitting connected to a lead wire drawn from the coil, and the terminal fitting is held on the bobbin. And a cover that covers a connection portion between the lead wire and the terminal fitting is attached to the connector portion.
According to such a configuration, it is possible to protect the connecting portion between the terminal fitting and the lead wire without molding the exterior portion, so that the cost is reduced while protecting the connecting portion between the lead wire and the terminal fitting. can do.

Moreover, the said terminal metal fitting is good also as what is press-fitted and hold | maintained at the said connector part.
The cover may include a pair of engaging pieces that engage the connector portion so as to embrace the connector portion from the side.

  ADVANTAGE OF THE INVENTION According to this invention, the coil apparatus which can reduce cost can be provided, protecting the connection part of a lead wire and a terminal metal fitting.

The rear view of the coil apparatus which concerns on Embodiment 1. FIG. Top view Perspective view of cover Partially enlarged side view of coil device Same part enlarged front view BB sectional view of FIG. Sectional drawing of the AA position of FIG. 1 showing a mode that a cover is attached The rear view of the coil apparatus which concerns on Embodiment 2. FIG. Top view Perspective view of cover Partially enlarged side view of coil device Same part enlarged front view DD sectional view of FIG. Sectional drawing of the CC position of FIG. 8 showing a mode that a cover is attached Sectional drawing of the CC position of FIG. 8 showing the state which attached the cover

<Embodiment 1>
Hereinafter, Embodiment 1 which actualized this invention is demonstrated in detail, referring FIGS. 1-7.
The coil device 10 according to the present embodiment is provided in a transmission case of an automatic transmission of an automobile, and constitutes a solenoid device for opening and closing a hydraulic valve. The coil device 10 includes a coil 12 formed by winding a winding 11 around a bobbin 20 and a terminal fitting 30 connected to a lead wire 13 drawn from the coil 12. In the following, each component will be described with the upper side in FIG. 1 as the upper side, the lower side as the lower side, the upper side in FIG.

The bobbin 20 is made of an insulating synthetic resin, and has a cylindrical bobbin main body 21 and a pair of flanges 22 projecting radially outward from both axial ends of the bobbin main body 21.
A winding 11 is wound around the outer periphery of the bobbin main body 21. The winding 11 is made of a thin wire made of metal (for example, made of copper) having excellent conductivity. The winding 11 wound around the bobbin main body 21 is covered with a protective member (not shown). The protective member is, for example, a tape material having an adhesive layer (adhesive layer) on the inner peripheral surface, and the tape material is wound several times.

  The bobbin 20 is integrally provided with a connector portion 23 that holds the terminal fitting 30. The connector part 23 is provided so as to protrude from the flange 22 part of the bobbin 20, and a lead wire holding part 23A for holding the lead wire 13 drawn out from the coil 12, a terminal mounting part 23B to which the terminal fitting 30 is attached, And an external connector (not shown) which is a terminal of the external circuit.

  The lead wire holding portion 23A has a shape protruding from the flange 22 of the bobbin 20 in the axial direction of the bobbin 20 (see FIG. 4). On the side surface in the width direction of the lead wire holding portion 23A, a guide groove 24 that guides the lead wire 13 to the terminal mounting portion 23B side is formed.

  The terminal mounting portion 23B has a shape protruding outward in the radial direction of the bobbin 20 from a position near the protruding end of the lead wire holding portion 23A (see FIG. 6). The width dimension of the terminal mounting portion 23B is smaller than the width dimension of the lead wire holding portion 23A and the connector portion 23, and terminal fitting recesses 25 are formed at both corners in the width direction. A part of a terminal fitting 30 to be described later is fitted into the terminal mounting portion 23B.

  The connector fitting portion 23C has a shape protruding in the axial direction of the bobbin 20 from the protruding end of the terminal mounting portion 23B. The connector fitting portion 23C has a shape that opens forward, and an external connector (not shown) can be fitted from the front. A press-fitting hole 26 into which the connector-side connection part 32 of the terminal fitting 30 can be press-fitted is formed in the back wall of the connector fitting part 23C. A pair of press-fitting holes 26 are formed side by side in the width direction of the connector fitting portion 23C.

  The terminal fitting 30 is press-fitted and held in the press-fitting hole 26 of the connector portion 23. A pair of terminal fittings 30 are provided corresponding to the lead wires 13 of the coil 12. Each terminal fitting 30 includes a coil-side connecting portion 31 connected to the lead wire 13, a connector-side connecting portion 32 connected to an external terminal (not shown) of the external connector, and a connecting portion 33 that connects between them. And is composed of.

  The connector-side connecting portion 32 has a shape that protrudes in the vertical direction from the end of the connecting portion 33 with respect to the connecting portion 33, is press-fitted into the press-fitting hole 26, and its tip protrudes into the connector fitting portion 23C.

  The coil side connecting portion 31 has a shape bent sideward after protruding forward from the end of the connecting portion 33. In the state where the terminal fitting 30 is held by the connector part 23, a part of the coil side connection part 31 is fitted in the terminal fitting recessed part 25 of the connector part 23, and the other part is a terminal. It will be in the state protruded to the side from the mounting part 23B (refer FIG. 7). Note that the lead wire 13 is connected to a portion (referred to as a connection piece 34) that protrudes laterally from the terminal mounting portion 23 </ b> B in the coil side connection portion 31 of the terminal fitting 30. The connection piece 34 has a substantially rectangular plate shape with a long width dimension in the protruding direction from the terminal mounting portion 23B. The pair of connection pieces 34 project from the terminal mounting portion 23B to both sides in a direction in which the plate surface is substantially parallel to the front surface of the terminal mounting portion 23B (a direction perpendicular to the side surface of the terminal mounting portion 23B).

  Now, a cover 40 is attached to the connector portion 23 so as to cover a connecting portion between the lead wire 13 and the terminal fitting 30. The cover 40 is assembled to the rear of the terminal fitting 30 in the press-fitting direction, and has a rear wall 41 that covers the rear of the terminal fitting 30, a pair of side walls 42 that covers the sides, and a front wall 43 that covers the front. .

  The rear wall 41 has a substantially rectangular plate shape that covers the entire rear side of the terminal fitting 30 attached to the connector portion 23. The vertical dimension of the rear wall 41 is equivalent to the vertical dimension of the terminal mounting part 23B and the connector fitting part 23C of the connector part 23, and the width dimension is equivalent to the width dimension of the connector fitting part 23C. Has been.

  A terminal accommodating recess 44 in which a part of the terminal fitting 30 is accommodated is formed on the front surface of the rear wall 41 (the surface facing the terminal mounting portion 23B and the connector fitting portion 23C). The terminal accommodating recess 44 has a shape that is recessed rearward at the center in the width direction of the rear wall 41. The terminal accommodating recess 44 accommodates the connecting portion 33 of the terminal fitting 30, and the connecting portion 33 is covered by the rear wall 41 in the upper, lower and rear directions.

  The side wall 42 and the front wall 43 are configured to engage the terminal mounting portion 23B so as to embrace the terminal mounting portion 23B of the connector portion 23 from the side, and constitute an engagement piece of the present invention (FIG. 7). The side wall 42 and the front wall 43 are connected to both end edges in the width direction of the rear wall 41 via hinges 45 so as to be rotatable around the hinges 45. Specifically, the side wall 42 and the front wall 43 can rotate between a closed state that covers the side and front of the connecting portion between the lead wire 13 and the terminal fitting 30 and an open state that opens the connecting portion. It has become.

  The side wall 42 and the front wall 43 are continuous in an L-shaped cross section, and the wall thickness dimension thereof is smaller than the wall thickness dimension of the rear wall 41 and is substantially constant from the side wall 42 to the front wall 43. The height dimension of the side wall 42 and the front wall 43 (dimension in the direction along the radial direction of the coil 12) is the same as the height dimension of the terminal mounting portion 23B of the connector portion 23 (see FIG. 6). ).

  The side wall 42 has a substantially rectangular plate shape that is long in the vertical direction and covers substantially the entire side surface of the terminal mounting portion 23B. In the closed state, the wall surface of the side wall 42 is substantially perpendicular to the wall surface of the rear wall 41.

  The front wall 43 has a wall shape that rises substantially vertically from the front end edge (end edge opposite to the hinge 45) of each side wall 42 toward the center in the width direction of the terminal mounting portion 23B. The width dimension of each front wall 43 is slightly smaller than approximately half the width dimension of the rear wall 41, and most of the front wall 43 faces the rear wall 41 in the closed state.

  The front wall 43 is formed with a cover-side relief portion 46 that avoids interference with a connector-side claw portion 27 described later. One cover-side relief portion 46 is formed on each front wall 43 at a portion overlapping the front of the terminal mounting portion 23B. Of the two cover side relief portions 46, one cover side relief portion 46 is provided on the upper portion of one front wall 43, and the other cover side relief portion 46 is provided on the lower side portion of the other front wall 43. The two cover side relief portions 46 are provided at positions shifted vertically and horizontally. Each cover-side relief portion 46 is a hole that has a substantially rectangular shape and opens the front wall 43 in the wall thickness direction, and can be fitted with a connector-side claw portion 27 described later.

  A cover-side claw portion 47 is provided at the hole edge of the cover-side relief portion 46 (see FIG. 7). The cover side claw portion 47 is provided on the edge on the opposite side to the side wall 42 in the hole edge portion of each cover side relief portion 46. The cover side claw portion 47 protrudes to the rear surface side of the front wall 43 (opposite surface side to the terminal mounting portion 23B) and protrudes from the hole edge portion of each cover side relief portion 46 into the cover side relief portion 46. I am doing. Each front wall 43 has a shape in which a portion where the cover-side claw portion 47 is provided protrudes on the opposite side of the side wall 42 from the other portions.

  In a state where the front wall 43 is closed, the cover-side claw portion 47 engages with a connector-side claw portion 27 described later in the front-rear direction and engages with a connector-side relief portion 26 described later. ing.

  A connector side relief portion 26 that avoids interference with the cover side claw portion 47 is formed in the terminal mounting portion 23 </ b> B of the connector portion 23. The connector-side relief portion 26 is a recess formed in the front surface of the terminal mounting portion 23B, and has a long groove shape in the width direction of the terminal mounting portion 23B. A pair of connector-side relief portions 26 are provided at an upper position and a lower position (a height position corresponding to the cover-side claw portion 47 respectively) of the terminal mounting portion 23B, and are substantially parallel to each other (see FIG. 5).

  In addition, the terminal mounting portion 23 </ b> B of the connector portion 23 is provided with a connector side claw portion 27 that engages with the cover side claw portion 47. The connector side claw portions 27 are provided at positions spaced apart in the vertical direction, one at each of the one end and the other end in the width direction of the terminal mounting portion 23B. The pair of connector-side claw portions 27 has a shape that rises from one end and the other end of the pair of connector-side relief portions 26 to the front of the connector-side relief portion 26 and protrudes to the side facing the connector-side relief portion 26. There is no.

  In a state where the cover side claw portion 47 and the connector side claw portion 27 are engaged, the opposing surfaces are aligned with the front surface of the terminal mounting portion 23B (the rear surface of the front wall 43 of the cover 40) in the front-rear direction. become. It should be noted that while the front wall 43 is in the open state to the closed state, the surface on which the cover-side claw portion 47 and the connector-side claw portion 27 are in contact with each other has an inclined surface with an almost equal gradient. Guide surfaces 48 and 28 for guiding the engagement are formed. Further, in a state where the cover side claw portion 47 and the connector side claw portion 27 are engaged, the connector side claw portion 27 does not protrude forward from the front wall 43 of the front wall 43 of the cover 40, and the front surface thereof is covered with the cover 40. It is designed to be almost flush with the front of the.

Next, an example of a method for manufacturing the connector device will be described.
First, a molded product in which the connector portion 23 and the bobbin 20 are integrated is manufactured, and then the terminal fitting 30 is held by the connector portion 23. At this time, the connector side connection portion 32 of the terminal fitting 30 is press-fitted into the press-fitting hole 28 of the connector portion 23. And while accommodating a part of coil side connection part 31 in the terminal fitting recessed part 25, let the connection part 33 be the state along the rear surface of the terminal mounting part 23B.

  Next, the winding wire 11 is wound around the bobbin 20 and a tape material is wound around the outer periphery thereof. Further, the lead wire 13 is fitted into the guide groove 24 of the lead wire holding portion 23A and pulled out to the terminal mounting portion 23B side, and the lead wire 13 and the connection piece 34 of the terminal fitting 30 are welded to each terminal fitting 30. And the coil 12 are electrically connected.

  Thereafter, the cover 40 is attached to the connector portion 23. After the cover 40 with the side wall 42 and the front wall 43 opened is mounted on the rear side of the connector portion 23, the side wall 42 and the front wall 43 are rotated in the closing direction. Then, the guide surface 48 of the cover side claw portion 47 and the guide surface 28 of the connector side claw portion 27 come into contact with each other, and the cover side claw portion 47 is guided to the side over the connector side claw portion 27 and the connector side claw portion. 27 is slightly elastically displaced outward in the width direction of the terminal mounting portion 23B, and the cover-side claw portion 47 is fitted into the connector-side relief portion 26 and the connector-side claw portion 27 is fitted into the cover-side relief portion 46. The side claw portion 47 and the connector side claw portion 27 are engaged. In this way, the cover 40 is attached to the connector portion 23, and the connection portion between the lead wire 13 and the terminal fitting 30 is covered with the cover 40. In addition, the cover 40 reliably prevents the terminal fitting 30 from being detached from the connector portion 23.

According to the first embodiment configured as described above, the following effects can be obtained.
Since the cover 40 is attached to the connector portion 23 so as to cover the connection portion between the lead wire 13 and the terminal fitting 30, the terminal fitting 30 and the lead wire 13 can be connected to each other without molding the exterior portion as in the prior art. The connecting part can be protected. Therefore, the cost can be reduced while protecting the connection portion between the terminal fitting 30 and the lead wire 13.

<Embodiment 2>
Next, a coil device 10 according to a second embodiment embodying the present invention will be described with reference to FIGS.
The coil device 50 of the present embodiment is different from the first embodiment in that the shape of the cover 51 is different. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and the overlapping description is abbreviate | omitted.

  As in the first embodiment, the coil device 50 according to the present embodiment includes a coil 12 in which the winding wire 11 is wound around the bobbin 20 and a terminal fitting 30 to which the lead wire 13 drawn from the coil 12 is connected. The bobbin 20 is integrally formed with a connector portion 23 that holds the terminal fitting 30.

  A cover 51 is attached to the connector portion 23 so as to cover a connection portion between the lead wire 13 and the terminal fitting 30 as in the first embodiment. The cover 51 is assembled to the rear of the terminal fitting 30 in the press-fitting direction. The cover 51 is a rear wall 52 covering the rear of the terminal fitting 30, a pair of side walls 53 covering the sides, and a pair of engagements engaged with the terminal mounting portion 23B. A joining piece 54 is provided.

  As in the first embodiment, the rear wall 52 has a substantially rectangular plate shape of substantially the same shape and the same size that covers substantially the entire rear side of the terminal fitting 30 attached to the connector portion 23, and its front surface (terminal mounting portion 23 B and A terminal housing recess 58 in which a part of the terminal fitting 30 is housed is formed on the surface facing the connector fitting portion 23C (see FIG. 13).

  A window portion 55 is formed at a substantially central position of the rear wall 52 (see FIG. 2). The window portion 55 has a rectangular shape that is long in the width direction of the rear wall 52 and penetrates the rear wall 52 in the wall thickness direction. The window portion 55 is provided continuously to the terminal accommodating recess 58, and the width dimension in the length direction is the same as the width dimension of the terminal accommodating recess 58 (see FIG. 14).

  The side wall 53 has a wall shape that rises substantially vertically from both end edges in the width direction of the rear wall 52. The vertical dimension of the side wall 53 is the same as the vertical dimension of the terminal mounting part 23B and the connector fitting part 23C of the connector part 23.

  A pair of engaging pieces 54 are provided in the width direction of the cover 51 so as to face each other, and engage the terminal mounting portion 23B so as to embrace the terminal mounting portion 23B of the connector portion 23 from the side. The engagement piece 54 is cantilevered from both ends of the rear wall 52 in the longitudinal direction of the window portion 55 and protrudes forward, and the protruding end reaches a position ahead of the side wall 53 (FIG. 14). reference). The pair of engaging pieces 54 has a symmetrical shape with respect to the center thereof, and can be elastically displaced in the direction of separation and approach.

  Each engagement piece 54 has a leg portion 54A that protrudes forward from the rear wall 52, and a cover-side claw portion 54B that protrudes inward (on the opposite side to the side wall 53) from the tip of the leg portion 54A. The cover-side claw portion 54B protrudes in a substantially vertical direction with respect to the leg portion 54A. The rear surface of the cover-side claw portion 54B has a position where the front end edge of the side wall 53 and the position in the front-rear direction are substantially equal. Further, in a state where the engagement piece 54 is engaged with the terminal mounting portion 23B, the front surface thereof is continuous with the front surface of the terminal mounting portion 23B.

  A connector side claw portion 56 with which the cover side claw portion 54B of the engagement piece 54 is engaged is formed in the terminal mounting portion 23B of the connector portion 23. The connector side claw portion 56 is a bottom surface of a recess formed in the front surface of the terminal mounting portion 23B, and a pair is provided at both ends in the width direction of the terminal mounting portion 23B (see FIG. 13). The pair of connector side claws 56 are respectively provided at positions near the upper end of the terminal mounting portion 23B (positions above the terminal fitting recess 25).

  Further, a guide groove 57 for guiding the cover side claw portion 54B to the connector side claw portion 56 is formed in the terminal mounting portion 23B. The guide grooves 57 are recessed on both side surfaces of the terminal mounting portion 23B, and extend in the front-rear direction from the rear end of the terminal mounting portion 23B to the connector-side claw portion 56. The depth dimension of the guide groove 57 is equal to the thickness dimension of the leg portion 54A of the engagement piece 54.

Next, an example of the manufacturing method of said coil apparatus 50 is demonstrated.
First, as in the first embodiment, a molded product in which the connector portion 23 and the bobbin 20 are integrated is manufactured, the terminal fitting 30 is held by the connector portion 23, the winding wire 11 is wound around the bobbin 20, and then the lead wire 13. And the connection piece 34 of the terminal fitting 30 are connected.

  Next, the cover 51 is attached to the connector portion 23. When the cover 51 is pushed into the connector portion 23 from the rear, the cover-side claw portion 54B of the engagement piece 54 is fitted into the guide groove 57 of the terminal mounting portion 23B, and the leg portion 54A is elastically displaced in the opening direction, and further the cover When 51 is pushed in, the cover side claw portion 54B is guided by the guide groove 57 and eventually fits into the connector side claw portion 56, and the leg portion 54A is elastically restored almost simultaneously. Thus, the cover-side claw portion 54B and the connector-side claw portion 56 are engaged, and the cover 51 is held in a state where it is attached to the connector portion 23.

  As described above, in the present embodiment, since the connector 51 is provided with the cover 51 that covers the connection portion between the lead wire 13 and the terminal fitting 30, as in the first embodiment, the exterior is provided as in the prior art. The connecting portion between the terminal fitting 30 and the lead wire 13 can be protected without molding the portion, and thus the cost can be reduced while protecting the connecting portion between the terminal fitting 30 and the lead wire 13. .

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the said embodiment, although the terminal metal fitting 30 is press-fitted and hold | maintained at the connector part 23, it is not restricted to this, For example, it accommodates in a connector part without press-fitting a terminal metal fitting, and attaches a cover. You may make it hold | maintain a terminal metal fitting in a connector part.

DESCRIPTION OF SYMBOLS 10,50 ... Coil apparatus 11 ... Winding 12 ... Coil 13 ... Lead wire 20 ... Bobbin 23 ... Connector part 30 ... Terminal metal fitting 40 ... Cover 42 ... Side wall (engagement piece)
43 ... Front wall (engagement piece)
54 ... engaging piece

Claims (3)

A coil having a winding wound around a bobbin, and a terminal fitting connected to a lead wire drawn out from the coil,
The bobbin is integrally formed with a connector portion for holding the terminal fitting,
A coil device in which a cover that covers a connection portion between the lead wire and the terminal fitting is attached to the connector portion.   The coil device according to claim 1, wherein the terminal fitting is press-fitted and held in the connector portion.   3. The coil device according to claim 1, wherein the cover includes a pair of engagement pieces that engage with the connector portion so as to embrace the connector portion from a side.

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