JP2015192466A - Coil wound body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil wound body capable of preventing a winding from slipping off from a shoulder portion when putting the winding on the shoulder portion, even if the shoulder portion is narrow.SOLUTION: A coil wound body is equipped with a cylindrical body portion around which a winding is wound in a coil-shape; a pair of flange portions formed at both ends in an axial direction of the cylindrical body portion; and a terminal supporting portion provided on one of the flange portions, and having a terminal supporting surface on which a terminal pin tied up with the winding is raised. The terminal supporting portion has a shoulder portion which is a generally right-angled corner portion, at an end portion in a direction orthogonal to the axial direction of the cylindrical body portion, on the terminal supporting surface. On the terminal supporting surface, a stopper portion is provided, which prevents the wound up winding from slipping off from the terminal supporting surface, when the wound up winding is tied up to the terminal pin through the shoulder portion.

Description

  The present invention relates to a coil wound body, and more particularly, to a coil wound body including a mechanism for preventing a winding from falling off during winding.

  Conventionally, when manufacturing a coil used for a stepping motor or the like, in order to prevent the winding near the terminal portion of the coil from being broken due to a molding pressure at the time of insert molding, Generally, the winding near the terminal portion has a slack.

  Another way to allow the winding to sag is when winding the winding around the bobbin, do not wind the shortest distance between the terminal pin that connects the winding at the beginning and end of winding and the body. Once the terminal pin is erected, the winding is passed through the corner of the terminal support surface on the coil circumferential direction side (hereinafter also referred to as “shoulder”) and the winding is hooked on the shoulder. There is a method in which a slack is provided by winding a wire around a terminal pin, and then pulling down a winding wound on a shoulder portion toward the body side.

JP 2005-33920 A

  While miniaturization of the device and efficiency of the mechanism are required, the number of turns of the coil and the space factor must often be maintained, and the bobbin thickness may be reduced as a measure to achieve both of them. . When the thickness of the bobbin is reduced, the area of the terminal support surface is also reduced, and the width of the shoulder portion is also reduced. As a result, when the other methods described above are used, the difficulty of adjusting the nozzle trajectory of the automatic winding machine becomes high, and there is a problem that the winding easily falls off from the shoulder when the winding is applied to the shoulder. Arise. Such a problem becomes more prominent when a multi-axis winding machine is used.

  In view of the above problems, the problem to be solved by the present invention is that the coil winding can prevent the winding from falling off the shoulder when the winding is applied to the shoulder even if the shoulder is narrow. To provide a body.

  In order to solve the above-mentioned problems, a coil winding body of the present invention includes a cylindrical body portion in which a winding is wound in a coil shape, and a pair of flange portions formed at both axial ends of the cylindrical body portion. A coil support comprising a terminal support surface provided on one side of the flange portion and having a terminal support surface on which a terminal pin around which the winding is wound is provided, wherein the terminal support portion is At the end of the terminal support surface in a direction perpendicular to the axial direction of the cylindrical body portion, there is a shoulder portion that is a substantially right angle corner, and the winding at the end of winding is provided on the terminal support surface. A gist is that a stopper portion is provided to prevent the winding at the end of winding from falling off from the terminal support surface when it is entangled with the terminal pin through the shoulder portion.

  By providing a stopper part on the terminal support surface to prevent the coil from falling off, the effective range of the shoulder part on which the coil can be hung is widened, which can reduce the difficulty of adjusting the nozzle of the automatic winding machine. it can.

  As a preferred configuration of the stopper portion, the terminal support is provided on the shoulder side of the terminal support surface and on the outer side opposite to the cylindrical body side with respect to the standing position of the terminal pin. The structure which forms the protrusion part extended perpendicularly | vertically from a surface can be considered. With this configuration, the winding at the end of winding is prevented from falling off to the outside of the terminal support surface when passing through the shoulder and then entangled with the terminal pin after passing through the outside. can do.

  By forming the protrusion, which is the stopper, on the shoulder side of the terminal pin and on the outside, the winding is connected to the outside from the terminal support surface while avoiding interference between the nozzle and the protrusion of the automatic winding machine. Moreover, when the winding hung on the shoulder portion after the binding is lowered to the cylindrical body side, the protruding portion does not hinder.

  Furthermore, since the protruding portion extends in the vertical direction from the terminal support surface, the mold structure for molding can be simplified as compared with the case where the convex portion and the concave portion are formed in the horizontal direction of the terminal support portion. it can.

  Further, since the shoulder portion is formed of a curved surface, damage to the winding due to the edge of the corner can be reduced, and the effect of preventing disconnection of the winding can be further improved.

  In addition, the extending position of the protruding portion and the standing position of the terminal pin on the terminal support surface have a portion that overlaps in a direction orthogonal to the axial direction of the cylindrical body portion, so that the winding becomes the protruding portion. It can be tangled to the terminal pin in a state where the winding is tensioned while abutting, and it is possible to prevent the winding from overcoming the protrusion and falling off to the outside due to the slack of the winding during tying it can.

  As another suitable configuration of the stopper portion, a configuration in which a staircase portion is formed on the shoulder portion is conceivable.

  By forming a staircase on the shoulder, the contact between the winding and the shoulder is increased, the frictional force with which the shoulder fixes the winding is increased, and the winding is prevented from falling off the terminal support surface. Can do. In this case, there is an advantage that the winding direction for winding the winding to the terminal pin may be either. However, the amount of sag when the winding wound around the shoulder is pulled down is smaller than in the case where the protrusion is formed.

  By pulling down the winding hung on the shoulder by each of the above means to the cylindrical body side after entanglement, the vicinity of the winding entangled with the terminal pin can be slackened.

  According to the coil winding body according to the present invention, even when the shoulder portion is narrow, it is possible to prevent the winding from dropping from the shoulder portion when the winding is applied to the shoulder portion.

It is an external appearance perspective view of the coil winding body in this embodiment. It is explanatory drawing which shows the state after the winding by the automatic winding machine. It is a fragmentary perspective view which shows other embodiment of a stopper part.

(Configuration of coil winding body)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of a coil wound body in the present embodiment. FIG. 2 is an explanatory view showing a state after winding by the automatic winding machine.

  The coil winding body according to the present embodiment is a bobbin 1 used for a stepping motor or the like. As shown in FIGS. 1 and 2, the bobbin 1 includes a cylindrical body portion 11 in which a winding 10 is wound in a coil shape, and a pair of flange portions 12 formed at both axial ends of the cylindrical body portion 11. And a terminal support portion 13 formed integrally with one of the flange portions 12.

  The terminal support portion 13 has a substantially right-angled corner portion at a longitudinal end portion of the terminal support surface 135 in which a terminal hole 133 in which the terminal pin 20 on which the winding start and end windings 100 are entangled is formed is formed. The shoulder portion 130 is.

  The terminal hole 133 is provided with a first terminal pin 21 with which the winding 101 at the beginning of winding is entangled and a second terminal pin 22 with which the winding 102 at the end of winding is entangled. The winding 101 at the beginning of winding wound around the first terminal pin 21 is hung on the first shoulder 131 and connected to the winding 10, and the winding at the end of winding wound around the second terminal pin 22. The wire 102 is hung on the second shoulder 132 and connected to the winding 10. In the present embodiment, the winding 100 at the start and end of winding is entangled with respect to the terminal pin 20 counterclockwise as viewed in the drawing.

(Embodiment of stopper part)
With reference to the standing position of the second terminal pin 22, a terminal support is provided at the second shoulder 132 side of the terminal support surface 135 and at the corner on the outer side opposite to the cylindrical body 11 side. A protrusion 30 that is a stopper portion extending in the vertical direction from the surface 135 is formed. The winding 102 at the end of winding passes through the second shoulder portion 132, and then is wound around the second terminal pin 22 counterclockwise after passing through the outside.

  Since the protrusion 30 is formed at such a position, when the winding end winding 102 is entangled with the second terminal pin 22, the winding end winding 102 is detached from the terminal support surface 135 to the outside. This increases the effective range of the second shoulder 132 through which the winding 102 at the end of winding can be hung, and the position of the protrusion 30 also interferes with the nozzle of the automatic winding machine. This makes it difficult to adjust the nozzle trajectory even when a multi-axis winding machine is used.

  The protrusion 30 extends from the terminal support surface 135 in the vertical direction. Therefore, when the protrusion 30 is extended in the horizontal direction and the recess 30 is formed at the symmetrical position of the protrusion 30 in the terminal support portion 13 so that the protrusion 30 is accommodated in another bobbin 1 adjacent in that direction. In comparison, the structure of the mold for injection molding the bobbin 1 is simplified.

  Moreover, by making the shoulder part 130 into a curved surface, damage to the winding 100 at the start and end of winding due to the edge of the corner can be reduced, and the effect of preventing the disconnection of the winding 10 can be further improved. .

  Further, the winding end of the winding end is made by bringing the extension position of the protrusion 30 on the terminal support surface 135 and the standing position of the second terminal pin 22 close to each other so as to partially overlap in the longitudinal direction of the terminal support surface 135. The winding 102 at the end of winding can be entangled with the second terminal pin 22 in a state where the winding 102 is in contact with the protrusion 30 and the winding 102 at the end of winding at the time of winding is slack. It is possible to prevent the winding 102 at the end of winding from overcoming the protrusion 30 and falling off to the outside.

  The winding 10 is wound around the bobbin 1 of FIG. 1 by the automatic winding machine, and after the state shown in FIG. 2 is reached, the winding 100 at the start and end of winding on the shoulder 130 is connected to the cylindrical body 11 side. By pulling it down, it is possible to give a slack in the vicinity of the winding 100 at the beginning and end of winding wound around the terminal pin 20, and that the winding 10 is disconnected by the molding pressure at the time of insert molding. Can be prevented.

  Even in this case, the protrusion 30 does not hinder the winding 102 at the end of winding from being lowered to the cylindrical body 11 side.

  FIG. 3 is a view showing another embodiment of the stopper portion. The stopper portion in the present embodiment is the staircase portion 31 formed on the second shoulder portion 132.

  By forming the step portion 31 on the second shoulder 132, the contact between the winding end winding 102 and the second shoulder 132 is increased, and the second shoulder 132 connects the winding end winding 102. The fixing frictional force is increased, and the winding end winding 102 can be prevented from falling off the terminal support surface 135.

  When forming the staircase portion 31, there is an advantage that the winding direction for winding the winding end winding 102 to the second terminal pin 22 may be either, but compared with the case where the projection portion 30 is formed, The amount of sag when the winding 102 at the end of winding wound on the second shoulder 132 is pulled down is reduced.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Bobbin 10 Winding 100 Winding start and end winding 101 Winding start winding 102 Winding end winding 11 Cylindrical body part 12 Flange part 13 Terminal support part 130 Shoulder part 131 First shoulder part 132 Second Shoulder part 133 terminal hole 135 terminal support surface 20 terminal pin 21 first terminal pin 22 second terminal pin 30 protrusion 31 step part

Claims (6)

A cylindrical body portion in which the winding is wound in a coil shape;
A pair of flange portions formed at both axial ends of the cylindrical body portion;
A coil winding body comprising: a terminal support portion provided on one of the flange portions and having a terminal support surface on which a terminal pin on which the winding is wound is erected,
The terminal support portion has a shoulder portion that is a substantially right angle corner at an end portion of the terminal support surface in a direction orthogonal to the axial direction of the cylindrical body portion,
The terminal support surface has a stopper portion for preventing the winding end winding from falling off the terminal support surface when the winding end winding is entangled with the terminal pin through the shoulder portion. The coil winding body characterized by being provided. Based on the standing position of the terminal pin, on the shoulder side of the terminal support surface and on the outer side opposite to the cylindrical body side, it extends vertically from the terminal support surface. A protrusion that is a stopper is formed,
2. The coil wound body according to claim 1, wherein the winding at the end of winding passes through the shoulder portion and then passes through the external side before being wound around the terminal pin.   The coil winding body according to claim 2, wherein the shoulder portion is formed of a curved surface.   The extended position of the projection and the standing position of the terminal pin on the terminal support surface have a portion that overlaps in a direction orthogonal to the axial direction of the cylindrical body. The coil winding body according to 3.   The coil winding body according to claim 1, wherein a stepped portion that is the stopper portion is formed on the shoulder portion. Further comprising the wound winding,
A slack portion, which is the winding having a slack, is provided between the winding wound around the cylindrical body portion and the winding wound around the terminal pin. The coil winding body according to any one of claims 1 to 5.

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