JP2014187851A - Stepping motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stepping motor including a wiring member which does not hinder winding of a coil of an insulator and is securely attached to the insulator without causing backlash.SOLUTION: A stepping motor includes: a cylindrical insulator around which a coil is wound, the cylindrical insulator having a protection wall of the coil at an inner periphery; a stator in which the insulator fits; and a wiring member which has the same shape as a shape of the one end side of the insulator, is disposed overlapping with the one end side, and integrally includes a connector housing disposed adjacent to a part of an outer periphery of the stator. In the insulator, multiple claw parts are formed on the protection wall. In the wiring member, claw receiving parts which extend facing an inner surface of the insulator and are provided corresponding to the claw parts are formed. The wiring member is disposed so that engagement between the claw parts and the claw receiving parts restrict the wiring member from moving relative to the insulator in a radial direction and an axial direction.

Description

  The present invention relates to a stepping motor, and more particularly to a wiring structure between a winding and a connector.

For example, the stepping motor connects a coil wound around the salient pole of the stator to a printed wiring board disposed on the top of the insulator, and supplies power to the coil via a connector terminal mounted on the wiring board. What was comprised is known (refer patent document 1).
As another configuration, there is known a configuration in which a connector housing is configured integrally or separately with an insulator, and a coil is electrically connected to a connector terminal of the connector housing via a crossover (patent) Reference 2).
Furthermore, as another configuration, the length of the collar at the base of the magnetic pole of the insulator attached to the stator core is made longer than the length of the collar at the tip of the magnetic pole, and a wedge-shaped projection is formed on the inner circumference of the collar at the base of the magnetic pole. There is a known configuration in which a printed circuit board is supported by the wedge-shaped projection and the end face of the tip of the magnetic pole (see Patent Document 3).

Japanese Utility Model Publication No. 61-32762 JP 2001-145325 A Japanese Patent Laid-Open No. 9-327165

However, the stepping motor described in Patent Document 1 has a disadvantage that a printed wiring board used for the stepping motor is expensive.
In addition, the stepping motor described in Patent Document 2 has a disadvantage that the insulators used in the stepping motor have different shapes at the top and bottom thereof, and the formation thereof is expensive.
Furthermore, the stepping motor described in Patent Document 3 is obstructed when winding the winding by providing a locking structure on the inner peripheral portion of the flange of the base portion of the magnetic pole of the insulator. It was not sufficient, and the wiring member was easy to come off and had the disadvantage of causing disconnection.

  The present invention has been made in view of such circumstances, and the object thereof is to provide a wiring member that is firmly attached to the insulator without play without being disturbed when winding the winding of the insulator. The object is to provide an inexpensive stepping motor.

The present invention is grasped by the following composition.
(1) The stepping motor of the present invention has a cylindrical insulator around which a winding is wound and has a protective wall for the winding on the inner periphery, a stator on which the insulator is fitted, and a shape on one end side of the insulator And a wiring member integrally including a connector housing disposed adjacent to a part of the outer periphery of the stator, and having a plurality of insulators on the protective wall. A first locking portion is formed, the wiring member extends opposite to an inner surface of the insulator, and a second locking portion provided corresponding to the first locking portion is formed, and the wiring member Is characterized in that the movement in the radial direction and the axial direction is restricted with respect to the insulator by mutual locking of the first locking portion and the second locking portion.
(2) In the stepping motor of the present invention, in the configuration of (1), a notch is provided in a part of the outer periphery of the wiring member, and one end of the winding wound around the insulator is passed through the notch. The wiring member is drawn to the surface opposite to the insulator and led to a connector pin provided on the wiring member.
(3) The stepping motor of the present invention is characterized in that, in the configuration of (1) or (2), a wiring relay portion for regulating a routing direction of one end of the winding is formed on the surface of the wiring member. And

  The stepping motor configured as described above does not get in the way when winding the winding of the insulator, and an inexpensive one having a wiring member that is firmly attached to the insulator without looseness can be obtained.

It is a block diagram which shows the stepping motor of this invention (The rotor which has a rotating shaft is abbreviate | omitted). It is a perspective view which shows the insulator with which the stepping motor of this invention is equipped. It is a perspective view which shows the wiring member with which the stepping motor of this invention is equipped. It is sectional drawing in the IV-IV line of FIG. It is a modification of the connector pin of the stepping motor of the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.
(Embodiment 1)
FIG. 1 is a configuration diagram showing a stepping motor of the present invention, in which a rotor having a rotating shaft is omitted.
That is, in FIG. 1, there is a stator 20 disposed around the periphery of the rotor, and the insulator 10 is fitted from above and below the stator 20, and the winding is wound around the winding portion of the insulator 10. ing. The stator 20 with the winding wound around the insulator 10 is arranged around the rotor.

Further, on one end side of the insulator 10, a wiring member 30 that is partially the same shape as the one end side is disposed so as to overlap the one end side of the insulator 10. The wiring member 30 is integrally formed with a connector housing 40 disposed adjacent to a part of the outer periphery of the stator 20.
In the wiring member 30, the winding wound around the insulator 10 is drawn out as a lead wire 50 on the surface opposite to the insulator 10, and is electrically connected to the connector pin 41 provided in the connector housing 40 of the wiring member. It has become so. The connector housing 40 is adapted to be fitted with a power supply connector (not shown) that supplies power to the winding of the insulator 10.

Hereinafter, the insulator 10 and the wiring member 30 will be described in more detail.
FIG. 2 is a perspective view showing the insulator 10. As shown in FIG. 2, a plurality of (e.g., eight in the figure) projecting plates at equal intervals along the circumferential direction on the inner peripheral surface of the cylindrical body 11 that forms a polygon (e.g., octagon in the figure). 12 is formed, and a protective wall 13 having a side protruding from the outer periphery of the protruding plate 12 is provided on the surface of the protruding plate 12.

A winding (not shown) is wound around each protruding plate 12 between the cylindrical body 11 and the protective wall 13 so that the winding is prevented from spilling from the protruding plate 12 by the protective wall 13. It has become.
Each protective wall 13 is arranged on a circle coaxial with the cylindrical body 11, and a rotor (not shown) having a rotation shaft is arranged in a space surrounded by the protective wall 13. .

Further, among the protective walls 13, for example, one end side (one end side along the central axis of the insulator 10) of the pair of protective walls 13 facing each other, respectively, is a claw portion (referred to as a first locking portion in this specification). 15) may be provided. The claw portion 15 is formed integrally with the protective wall 13, for example, and is formed as a protruding portion having an inclination 15 </ b> A that increases in height from the one end side to the other end side along the central axis of the insulator 10. The claw portion 15 functions as a locking portion that is locked with a claw receiving portion (indicated by reference numeral 38 in FIG. 3) of the wiring member 30 described later.
3A and 3B are perspective views showing the wiring member 30. FIG. 3A is a perspective view of the wiring member 30 viewed from the front side, and FIG. 3B is a perspective view of the wiring member 30 viewed from the back side.

As shown in FIGS. 3A and 3B, the wiring member 30 is provided with a circular hole 31 in the center thereof. The diameter of the hole 31 is substantially equal to the diameter of a circle formed by the inner peripheral surface of the protective wall 13 of the insulator 10.
A part of the outer periphery of the wiring member 30 has an extending portion 30A extending in the radial direction, and a connector housing 40 is formed integrally with the wiring member 30 in the extending portion 30A. The connector housing 40 has a box shape protruding from the back side of the wiring member 30, and a plurality of (for example, four in the figure) connector pins 41 are implanted in the box. As apparent from FIG. 3A, the connector pin 41 protrudes to the front side of the wiring member 30.
A cutout 33 is provided on the outer periphery of the wiring member 30, and one end (leader wire 50) of the winding wound around the insulator 10 is drawn out to the front side of the wiring member 30 through the cutout 33. (See FIG. 1).

  Further, on the front side of the wiring member 30, a circumferential projection 35 is provided in a part of the periphery of the hole 31 on the connector housing 40 side, and further, between the circumferential projection 35 and the projected connector pin 41. A wiring relay portion 36 made of a protruding bar is provided. The circumferential protrusion 35 prevents one end of the winding (leading wire 50) routed to the front side of the wiring member 30 from being arranged in the region of the hole 31, and the wiring relay portion 36 has one end of the winding ( When the lead wire 50) is electrically connected to the connector pin 41, the direction can be changed (see FIG. 1).

  A claw receiving portion (which may be referred to as a second locking portion in this specification) 38 is provided around the hole 31 of the wiring member 30 and at a position corresponding to the claw portion 15 provided in the insulator 10. Is provided. The claw receiving portion 38 has a recessed portion 38B on the surface (surface on the central axis side of the hole) of the plate member 38A extending from the side surface of the hole 31 beyond the back surface of the wiring member 30 along the direction of the central axis of the hole 31. It is provided by forming.

FIG. 4 is a view showing a cross section taken along line IV-IV in FIG.
As shown in FIG. 4, the wiring member 30 is arranged on the insulator 10 so as to overlap the one end side of the insulator 10 from the direction A in the drawing. In this case, as will be apparent from FIG. 4, the claw portion 15 formed on the protective wall 13 of the insulator 10 is fitted into the recessed portion 38 </ b> B of the claw receiving portion 38 formed on the wiring member 30. 38 is engaged.

In this case, the width of the claw portion 15 and the width of the recessed portion 38B of the claw receiving portion 38 are formed to be substantially equal, whereby the wiring member 30 is restricted from moving around the central axis of the hole 31 and the wiring member 30 Movement in the radial direction (the radial direction of the hole) and the axial direction is regulated. For this reason, disconnection of the winding lead-out line 50 (refer FIG. 1) by the movement with respect to the insulator 10 of the wiring member 30 can be made hard to occur.
Further, the wiring member 30 configured as described above can be configured easily and at low cost when compared with, for example, a printed wiring board.

  In FIG. 4, an insulator 10 ′ is also fitted on the other end side of the stator 20, and this insulator 10 ′ has the same configuration as the above-described insulator 10, and includes a claw portion 15. It has become. By configuring the insulator 10 ′ in this manner, the wiring member 30 can be attached to the insulator 10 ′ side as necessary.

(Embodiment 2)
In the first embodiment, the number of the claw portions 15 formed on the insulator 10 is two, and the number of the claw receiving portions 38 formed on the wiring member 30 corresponding to this is also two. However, it is not limited to this number, and it goes without saying that the number may be three or more.

(Embodiment 3)
In the first embodiment, the first locking portion formed on the insulator 10 is the claw portion 15, and the second locking portion formed on the wiring member 30 is the claw receiving portion 38. However, the present invention is not limited to this, and the first locking portion formed on the insulator 10 is the claw receiving portion 38 and the second locking portion formed on the wiring member 30 is the claw portion 15. It goes without saying.

(Embodiment 4)
In the first embodiment, the connector pin 41 has a rod shape and is inserted or outsert in the wiring member 30. However, as shown in FIG. 5, the connector pin is bent and extended to the vicinity of the notch 33 of the wiring member 30. The connector pin 42 is insert-molded into the wiring member 30 so as to protrude outward near the notch 33, and one end of the winding wound around the insulator 10 is outward near the notch 33. It is possible to perform continuity treatment by entangled with the protruding portion.
Thereby, the winding position of the winding can be brought close to the notch 33 without requiring the circumferential protrusion 35 and the wiring relay part 36, and the effect of preventing disconnection can be further improved.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

10: Insulator,
11 ... Cylindrical body,
12 …… Protruding plate,
13 ... Protective wall,
15: Claw part (first locking part),
15A ... Inclined,
20: Stator,
30: Wiring member,
30A …… Extension part,
31 ... hole,
33 …… Notch,
35 …… Circumferential projection,
36 …… Wiring relay part,
38 …… Nail receiving part (second locking part),
38A ... Plate material,
38B ...... concave part,
40 …… Connector housing,
41, 42 …… Connector pins,
50 …… Lead wire.

Claims (3)

A cylindrical insulator around which a winding is wound and having a protective wall of the winding on the inner periphery;
A stator for fitting the insulator;
A wiring member integrally formed with a connector housing disposed substantially adjacent to the one end side of the insulator and arranged adjacent to a part of the outer periphery of the stator.
The insulator has a plurality of first locking portions formed on the protective wall,
The wiring member has a second locking portion that extends opposite to the inner surface of the insulator and is provided corresponding to the first locking portion,
The stepping motor is characterized in that the wiring member is disposed such that movement in a radial direction and an axial direction is restricted with respect to the insulator by mutual locking of the first locking portion and the second locking portion. . A notch is provided in a part of the outer periphery of the wiring member,
One end of the winding wound around the insulator is pulled out to the surface of the wiring member opposite to the insulator through the notch, and is guided to a connector pin provided on the wiring member. The stepping motor according to claim 1. The stepping motor according to claim 1, wherein a wiring relay portion that regulates a direction in which one end of the winding is routed is formed on a surface of the wiring member.

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