JP3981846B2 - Electromagnetic coil connection terminal structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic coil connection terminal structure to which a harness is externally attached.
[0002]
[Prior art]
As a conventional electromagnetic coil of a hydraulic electromagnetic valve used for an automatic transmission of an automobile, for example, there are those shown in FIGS.
[0003]
Briefly, a solenoid comprising a bobbin 3 and a coil 4 wound around the bobbin 3 is disposed inside a cylindrical solenoid body 1 whose upper end is closed by an insulating cover 2. The bobbin 3 includes a cylindrical main body 5 around which the coil 4 is wound, and upper and lower flange portions 6 and 7 provided integrally with the upper and lower ends of the cylindrical main body 5. The protrusion 8 protruding in the radial direction is integrally provided, and the concave groove 9 is formed at a position sufficiently separated from the protrusion 8 in the same direction.
[0004]
An elongated plate-like terminal portion 10 is disposed on the bottom surface of the concave portion 8a at the top of the protruding portion 8, and the terminal portion 10 is press-fitted into the upper portion of the upper flange portion 6 as shown in FIG. The fixing piece 11 is fixed to the upper flange portion 6. In addition, the fixed piece 11 has a base end portion 11a connected to the terminal portion 10 bent in a substantially U shape, and a tip edge of a tip portion 11b bent in a substantially square shape has the concave portion. It is arranged in the groove 9. That is, the tip edge is bent into a U-shape to form the fusing portion 12, and the winding start end portion 4a of the coil 4 held inside is electrically welded.
[0005]
In addition, one end of a harness core wire (not shown) is inserted into the groove 10a formed at the tip of the terminal 10 and connected by soldering.
[0006]
[Problems to be solved by the invention]
In the conventional connection terminal structure of the electromagnetic coil, in order to ensure the fixing of the terminal portion 10, the length of the fixing piece 11 is set to be long, and a complicated bending is performed. Since the upper flange portion 6 is press-fitted and fixed, the outer diameter of the upper flange portion 6 must be set to be large.
[0007]
In addition, since the fusing part 12 is disposed in the concave groove 9 in order to avoid collision between the fusing part 12 and other parts, it is necessary to secure a space for performing the electric welding work. It is relatively large. Therefore, also from this point, the outer diameter of the upper flange portion 6 has to be set large.
[0008]
As a result, the entire outer diameter of the bobbin 3 is increased, and the diameter of the solenoid valve has to be increased.
[0009]
Further, since the fixed piece 11 is formed in a long and complicated shape, the structure of the terminal portion 10 as a whole becomes large, the manufacturing work of the terminal portion 10 becomes complicated, and shape management becomes difficult.
[0010]
The present invention has been devised in view of the situation of the conventional connection terminal structure, and provides a terminal structure that can simplify the fixing structure of the terminal part to the protrusion and reduce the outer diameter of the flange part. Objective.
[0011]
[Means for Solving the Problems]
The present invention, coils projecting portion is provided which projects radially outward on the flange portion of the bobbin Body end wound around one end of the coil winding of the harness provided with a pressing portion to be electrically welded In the connection terminal structure of the electromagnetic coil in which the terminal portion having a U-shaped groove into which the core wire is inserted is provided at the distal end portion, the insertion portion has an insertion hole into which the terminal portion is inserted from the proximal end side. The locking portion is formed on the inner peripheral surface of the insertion hole, and the locking portion is configured by the wall surface of the locking hole, and the locking portion is inserted in the insertion hole. one of the elastic claw that is locking provided to the terminal portion, provided with the pressing portion which is formed bent upward on one side of the terminal portion leading end side extending from the insertion hole together, A substantially U-shape opening the fusing portion toward the tip of the terminal portion It was formed in.
[0012]
That is, when the terminal portion is inserted into the insertion hole of the protrusion formed on the flange portion, the elastic claw formed on the terminal portion is formed on the inner peripheral surface of the insertion hole. It is locked to and fixed.
[0014]
Further , since the fusing part is integrally provided on the side part of the terminal part at the projection part, it is necessary to form a concave groove in the flange part in which the fusing part is arranged as in the prior art. Disappear.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment of a terminal structure of an electromagnetic coil according to the present invention. Since the basic structure is the same as that of the prior art, the same parts are denoted by the same reference numerals and detailed description thereof is omitted. .
[0016]
That is, 1 is a solenoid body, 2 is a core, 20 is a bobbin in which a cylindrical plunger 13 is fixed on the inner peripheral side, and this bobbin 20 includes a cylindrical main body 22 around which a coil 21 is wound, It is comprised from the flange parts 23 and 24 integrally provided in the upper and lower ends of the cylindrical main body 22. As shown in FIG.
[0017]
The upper flange portion 23 has an outer diameter set to about 24 mm, and has an annular plate-shaped metal retainer 25 on the upper surface thereof bent downwardly at claws 25a and 25b provided at 180 ° positions on the outer periphery. The terminal portion 21a of the coil 21 winding is connected to the fusing portion 26 projecting from the claws 25a, 25b of the retainer 25 at the outer peripheral edge at a position of 90 ° by electric welding.
[0018]
And the protrusion part 27 is integrally protrudingly provided in the position on the opposite side to the said fusing part 26 of the upper side flange part 23 along the radial direction. As shown in FIGS. 1 and 2, the protrusion 27 has a substantially rectangular plane shape, and a base end portion 27 a that is integrally fixed to the upper flange portion 23 is formed to be relatively thick like the upper flange portion 23. In addition, the distal end portion 27b is formed in a stepped thin shape that is about half the thickness of the proximal end portion 27a. Further, the protrusion 27 has a pair of locking claws 29a and 29b to which the insulating cover 28 is engaged on both sides of the distal end side of the base end portion 27a, and a protrusion with the upper flange portion 23 of the base end portion 27a. In the vicinity of the root portion, an arc groove 30 to which the start end portion 21b of the coil 21 is attached is formed. Further, the outer edge of the narrow groove 31 formed on the side portion of the base end portion 27a and having the same thickness as the distal end portion 27b guides the coil 21 starting end portion 21b inward and avoids contact with other components. A rising wall 27c is projected.
[0019]
Further, as shown in FIGS. 3 and 4, a rectangular insertion hole 33 through which the terminal portion 32 is inserted from the upper surface of the distal end portion 27b is formed in the front end portion of the base end portion 27a from the lateral direction. A locking hole 34 penetrating from the top to the insertion hole 33 is formed in the upper part of the base end portion 27a, and a front end edge 34a of the locking hole 34 is a locking portion.
[0020]
On the other hand, as shown in FIGS. 3 and 4, the terminal portion 32 is formed in a long and narrow shape with a metal plate, and an elastic claw 35 is cut and raised at a substantially central position of the base portion 32a, and a harness 36 is formed on the distal end portion 32b. A U-shaped groove 37 into which the core wire 36a is inserted is formed.
[0021]
The elastic claw 35 is formed such that a distal end edge 35b on the distal end portion 32b side is inclined and is elastically deformable in the vertical direction with the base end 35a as a fulcrum, and the length in the front-rear direction is the locking hole. The tip edge 35 b is set to a length that makes contact with the front end edge 34 a of the locking hole 34 at a position where it is completely fitted into the hole 34. Further, a fusing portion 38 that is bent upward is integrally provided on one side of the terminal portion 32, and the fusing portion 38 is formed in the coiled U-shape inside the coil. The starting end 21b of 21 is held and connected to the starting end 21b by electric welding.
[0022]
In the present embodiment configured as described above, in order to attach the terminal portion 32 to the bobbin 20, first, the base end 32a side of the terminal portion 32 is placed on the upper surface of the distal end portion 27b of the protruding portion 27 as shown in FIG. Then, as it is pushed into the insertion hole 33 as it is, the elastic claw 35 is gradually pushed down at the hole edge 33a of the insertion hole 33, cut and raised, and once inserted into the groove 39, the insertion hole 33 is formed. Pass through. When further pushed in, as shown in FIG. 4, when the elastic claw 35 is fitted into the locking hole 34, the leading edge 35b rises by its own elastic reaction force with the base end 35a as a fulcrum, and at the same time, the leading edge 35b. Engages with the front end edge 34 a of the engagement hole 34. Therefore, the terminal portion 32 is firmly and securely attached to the protruding portion 27 with one touch.
[0023]
After that, the starting end portion 21b of the coil 21 drawn out in advance is disposed along the arc groove 30 and the narrow groove 31, and the tip edge is held by the fusing portion 38 and is joined by electric welding.
[0024]
Next, as shown in FIG. 1, the core wire 36a of the harness 36 is engaged by soldering while being inserted into the U-shaped groove 37 of the terminal portion 32, and the insulating cover 28 is then engaged with the locking claws 29a and 29b. Then, if it is locked and fixed while covering the entire protrusion 27, the mounting operation is completed.
[0025]
As described above, according to the present embodiment, the terminal portion 32 can be easily and firmly attached to the protruding portion 27 by the locking hole 34 and the elastic claw 35 with one touch. A lengthy and complicated fixing piece is completely unnecessary. Therefore, it is not necessary to make the outer diameter of the upper flange portion 23 large, and it can be set sufficiently small.
[0026]
In addition, since the fusing portion 38 is provided directly on the terminal portion 32, it is not necessary to form a conventional concave groove at all, so that the outer diameter of the upper flange portion 23 can be further reduced in this respect.
[0027]
As a result, the outer diameter of the entire bobbin 20 can be reduced, and the entire solenoid valve can be reduced in size.
[0028]
Furthermore, since the terminal portion 32 can be simply formed in the shape of a short thin plate as described above, the terminal portion 32 can be made compact and has a simple structure, so that the manufacturing operation is facilitated and the cost is low. Can be achieved.
[0029]
In addition, this invention is not limited to the structure of the said embodiment, For example, a locking part is not a locking hole, but simply provides a groove on the inner peripheral surface of the insertion hole to form a locking part. Is also possible.
[0030]
【The invention's effect】
As apparent from the above description, according to the connection terminal structure of the electromagnetic coil according to the present invention, the outer diameter of the flange portion of the bobbin can be sufficiently reduced, and the entire electromagnetic coil can be reduced in size.
[0031]
In addition, since the terminal portion can be attached very easily and can be made to have a short structure, the manufacturing efficiency of the terminal portion can be improved, the cost can be reduced, and the installation efficiency can be improved.
[0032]
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a side view of an essential part showing an attaching operation of a terminal part provided for the embodiment.
FIG. 4 is a side view of an essential part showing an attaching operation of a terminal part provided for the embodiment.
FIG. 5 is a longitudinal sectional view showing a connection terminal structure of a conventional electromagnetic coil.
6 is a view taken in the direction of arrow B in FIG. 5;
[Explanation of symbols]
20 Bobbin 21 Coil 21b Start end 22 Tubular body 23 Upper flange 24 Lower flange 27 Projection 32 Terminal 33 Insertion hole 34 Locking hole 34a Front edge (locking part)
35 Elastic Claw 36 Harness 38 Fusing Part

Claims (1)

Coil protrusions provided to project radially outward flange portion of the bobbin Body end wound, the core wire of the harness is inserted provided with a pressing portion to which one end portion of the coil winding is electrically welded In the connection terminal structure of the electromagnetic coil in which the terminal portion having the U-shaped groove at the tip portion is provided on the projection portion ,
An insertion hole into which the terminal portion is inserted from the base end side is formed in the protrusion, and a locking hole is provided on the inner peripheral surface of the insertion hole, and the locking portion is configured by the wall surface of the locking hole. together, while the elastic claw to be locked to the locking portion of the terminal portion in a state of being inserted into the insertion hole provided in the terminal portion,
The fusing part bent upward is integrally provided on one side part of the terminal part tip side extending from the insertion hole, and the fusing part opens toward the tip side of the terminal part. The connection terminal structure of the electromagnetic coil characterized by having formed in the substantially U shape .

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