JPH03164041A - Field coil for starter - Google Patents

Abstract

PURPOSE:To facilitate the bending processing by forming a spacer part between the cylindrical part of a bobbin and a straight angle line, when bending the inner periphery side end part of the straight angle line wound on a bobbin in L shape as a terminal for connection and drawing out to the periphery of a coil. CONSTITUTION:A straight angle line 1a approximately 3mm in board thickness is wound plural times (three times in figure) on a bobbin made of resin so as to make a field coil 1. The bobbin 2 is composed of a rectangular tube part 2a for engaging with the periphery of a pole core 4 and a brim part 2b for supporting the straight angle line 1a. The periphery side end part of the coil 1 is twisted 90 deg. and made a terminal for connection, and the inner periphery side end part 1b is bent in L shape and drawn out to the periphery of the coil 1, and is made a terminal for connection. To fill the gap arising between the tube part 2a of the bobbin 2 and the second layer of the coil 1, a projection 9a l in thickness is provided in the tube part 2a at the winding start part of a coil 1, and a spacer part 9 is made. Hereby, the bending processing of the inner periphery side end part 1b can easily be done.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a field coil for a starter.

[Prior Art] Conventionally, there has been a starter that uses a flat wire as a field coil.

As shown in FIG. 5, the field coil is constructed by winding a rectangular wire 100 around the outer periphery of a bobbin 101, and after attaching it to the outer periphery of a ball core 102,
It is fixed to the inner periphery of the yoke 104, facing the outer periphery of the yoke 03.

As shown in FIGS. 5 and 6, the inner peripheral end of the flat/square wire 100 wound around the bobbin 101 is connected to a connecting terminal 10.
It is bent into an L-shape as 0a and pulled out to the outer periphery of the flat rectangular wire 100.

[Problem to be solved by the invention] However, it is difficult to use a thick rectangular wire 1 as a field coil.
00, the bent portion of the L-shaped connecting terminal 100a interferes with the end play 1 105, which is the axial corner of the armature core 103.

For this reason, as shown in FIG. 6, it was necessary to flatten the bent portions to reduce the thickness of the rectangular wire 100.

As a result, there were problems such as an increase in the number of man-hours required to process the field coil, and the crushing of the bent portion making it difficult to perform L-shaped bending of the rectangular wire.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to reduce the number of processing steps and to provide a starter field that can easily perform L-shaped bending of a rectangular wire wound around a bobbin. Our goal is to provide coils.

[Means for Solving the Problems] In order to achieve the above object, the present invention has an inner circumferential measuring end of a rectangular wire disposed facing the outer circumferential surface of an armature core and wound around a bobbin. In the starter field coil, which is bent in an I-shape as a terminal and extended to the outer periphery of the flat wire, the bobbin includes a bent portion of the flat wire bent in an I-shape, and the armature core. The technical means is that a spacer part is formed to provide a predetermined gap between the corner part in the axial direction.

[Operations] and Effects of the Invention The present invention having the above-mentioned configuration forms a smoothing part on the bobbin to form a smoothing part between the bent part of the rectangular wire wound on the bobbin and the axial corner of the armature core. By providing a predetermined gap between
Interference between the bent portion of the flat wire and the axial corner of the armature core can be eliminated.

Therefore, compared to conventional field coils that require flattening of flat wires, the number of processing steps can be reduced, and the elimination of flattening involves the L-shaped bending of the inner end of the flat wire. Processing can be performed easily.

[Example] Next, the starter field coil of the present invention will be explained based on an example shown in the drawings.

FIG. 1 is a sectional view of a main part of a starter equipped with a field coil, and FIG. 2 is a plan view of the field coil.

As shown in FIG. 2, the field coil 1 of this embodiment consists of a rectangular wire 1a with a plate thickness of approximately 3 mm wound around a resin bobbin 2 (lm in this embodiment), and integrally wrapped with a pinned tape 3. It is fixed. Bobbin 2 has ball core 4
A rectangular cylindrical portion 2a that is fitted around the outer periphery of the cylindrical portion 2a, and a collar portion 2b that supports the rectangular wire 1a that is wound around the cylindrical portion 2a.
(See Figure 3).

The inner peripheral marked end of the flat wire 1a wound around the bobbin 2 is the second
As shown in the figure, the flat wire 1a is bent into an L shape and pulled out to the outer periphery of the flat wire 1a, and the connecting terminal 1
b, 1C.

Each field coil 1 is attached to the outer periphery of a ball core 4, and is arranged to face the outer periphery of an armature core 7 by fixing the ball core 4 to the inner periphery of a yoke 6 with a screw 5. At this time, the L-shaped connecting terminal 1b is connected to the end plays 1 and 8 of the armature core 7.
In order to prevent interference, the bobbin 2 of this embodiment is provided with a spacer portion 9, as shown in FIGS. 2 and 3. Note that FIG. 3 is a sectional view of the bobbin 2.

The spacer part 9 is for providing a predetermined gap between the bent part of the connection terminal 11) and the end plate 8, which is the corner part in the axial direction of the armature core 7. It is formed by increasing the wall thickness of the cylindrical portion 2a of the bobbin 2 corresponding to that portion.

This spacer portion 9 has a wall thickness D in the axial direction (horizontal direction in Fig.
A convex portion 9a is formed to fill the gap with the second layer (see FIG. 2).

Therefore, the field coil 1 wound around this bobbin 2
Since there is a distance 9 between the inner periphery of the connecting terminal 1b which is a single layer surface (jjl1 surface and the side surface of the ball core 4), there is a distance between the bent part of the connecting terminal 1b and the end plates 1 and 8. A predetermined gap will be formed.

By forming the spacer portion 9 on the bobbin 2 in this manner, interference between the connection terminal 1b and the end plate 8 can be eliminated. Therefore, as in the conventional case, the connection terminal 1b
There is no need to crush the field coil 1, and the number of man-hours required to process the field coil 1 can be reduced. Further, by omitting the crushing process, the L-shaped bending process of the inner circumferential end of the flat wire 1a can be easily performed.

In this embodiment, the spacer portion 9 is provided with a convex portion 9a for filling the gap between the first and second layers of the finoretokoinore 1, but the convex portion 9a is not necessarily formed. It is not necessary to do so, and the spacer portion 9 may have a partially convex shape having a wall thickness 9, as shown in FIG.

[Brief explanation of the drawing]

Figures 2 to 3 show an embodiment of the wooden invention.
FIG. 1 is a sectional view of a main part of a starter equipped with a field coil, FIG. 2 is a plan view of the field coil, and FIG. 3 is a sectional view of a bobbin. FIG. 4 is a plan view of a Feel 1ζ coil showing a modification of the spacer portion. 5 and 6 explain the prior art, FIG. 5 is a sectional view of the main part of a starter equipped with a field coil, and FIG. 6 is a plan view of the main part of the field coil. In the figure 1...Field coil 1a...Flat wire 1b, 1
C... Connection terminal 2... Bobbin 7 ・Armadure core 9... Spacer department agent Kenji Ishiguro 114 Figure 1b 1C Figure 5 116 Figure 100a

Claims (1)

[Scope of Claims] 1) The inner peripheral end of a flat wire placed opposite to the outer peripheral surface of the armature core and wound around a bobbin is bent into an L-shape as a connection terminal, and the flat wire is bent into an L-shape as a connection terminal. In the starter field coil pulled out to the outer periphery of the bobbin, the bobbin includes a bent part of the flat wire bent in an L-shape and an axial corner of the armature core,
A field coil for a starter, characterized in that a spacer portion is formed to provide a predetermined gap.