JPH0742212Y2 - Cord drawer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cord withdrawing device, and more particularly to a cord withdrawing device adapted to pull out a cord through an insertion hole formed in a wall.

[Outline of device]

For example, in the structure of pulling out the cord from the insertion hole of the bracket of the motor, the outer edge portion of the insertion hole is chamfered, and the holder is attached to the portion inside the bracket where the insertion hole is formed, Moreover, the size of the insertion hole of the holder is reduced and the both ends are chamfered to prevent the cord from being damaged by the inner edge of the insertion hole of the bracket.

[Conventional technology]

For example, in a motor, it is necessary to draw a cord for passing a driving current through a casing. Therefore, conventionally, as shown in FIG. 3, the cord 3 is drawn out through an insertion hole 2 formed in the front or rear bracket 1. When the bracket 1 is made of metal or hard thermosetting resin, the coating of the cord 3 is damaged by the edge portion of the insertion hole 2 during the assembling work, and the value of the product is impaired. In addition, the work must be done carefully so as not to damage the work, which deteriorates workability. Therefore, in order to eliminate such a problem, the chamfered portion 4 is conventionally formed by chamfering the edge portion of the insertion hole 2 as shown in FIG.

[Problems to be solved by the invention]

As described above, the chamfered portion 4 is formed at the edge portion of the insertion hole 2 in order to protect the cord 3, but the inner portion of the insertion hole 2 that is usually inside the bracket 1 is space-wise. It is often impossible to chamfer by machining. Therefore, conventionally, the inner edge of the insertion hole 2 is chamfered manually in a separate process, or a cord that is not easily scratched is used.

If you chamfer manually in a separate process,
The cost increases. Also, due to space limitations, it may not be possible to chamfer manually. In such a case, it is necessary to work carefully so as not to damage the cord 3 at the inner edge of the insertion hole 2. Alternatively, it is necessary to select a synthetic resin that is not easily scratched as the bracket 1 or to use the cord 3 that is coated with high strength, which limits the usable material. Alternatively, in order to prevent the inner edge of the insertion hole 2 from being scratched, it is necessary to take measures such as increasing the size of the insertion hole 2 of the cord 3, which limits the structure.

The present invention has been made in view of the above problems, and it is possible to reliably prevent the cord from being damaged without chamfering the inner edge portion of the insertion hole of the bracket or the like. It is intended to provide a drawer device.

[Means for solving problems]

The present invention relates to a device in which a cord is drawn out through an insertion hole formed in a wall portion, the edge of the insertion hole facing the outer surface of the wall portion is chamfered, and the inside of the wall portion is An insertion hole in which a pocket is provided in a portion where the insertion hole is formed, and a holder is mounted in the pocket, and in which the dimension in the radial direction is smaller than that of the insertion hole of the wall portion and the edge portions at both ends are chamfered. Is formed in the holder, and the cord inserted into the insertion hole of the wall portion is further inserted into the insertion hole of the holder.

[Action]

Therefore, the cord is positioned inside the wall by the insertion hole of the holder, and since the insertion hole of this holder is smaller than the insertion hole of the wall, the insertion hole of the wall The inner edge of the cord protects the cord from damage.

〔Example〕

FIG. 2 shows a DC motor having a cord pulling apparatus according to an embodiment of the present invention, which DC motor has a cup-shaped yoke 10. A bracket 11 is attached to the left open end of the yoke 10. The yoke 10 and the bracket 11 constitute the casing of this motor,
A rotary shaft 12 is rotatably arranged so as to penetrate the central portion of the casing. That is, the rotating shaft 12 is rotatably supported by a bearing bush 13 attached to the tip of the yoke 10 and a bearing bush 14 attached to the center of the bracket 11. A seal ring 15 is attached to the outside of the bearing bush 14 to prevent water from entering. The rotor core is attached to the rotary shaft 12.
The armature coil 17 is wound around the rotor core 16 while the 16 is fixed. A magnet 18 is attached to the inside of the yoke 10 so as to face the magnetic poles of the rotor core 16 via a small air gap.

A commutator 21 is further fixed on the rotating shaft 12. The brush 22 is held by the brush holder 23 so as to be pressed against the commutator 21. And brush 22 and commutator 21
Cord 24 for powering armature coil 17 through
Are drawn out through the insertion hole 25 of the bracket 11. The tip of the cord 24 is connected to the brush 22 via a pigtail (not shown).

Next, the structure of the lead-out portion of the cord 24 will be described in more detail. As shown in FIG. 1, a pocket 26 is formed inside the insertion hole 25 of the bracket 11 and a holder is provided in this pocket 26. 27 is to be retained. An insertion hole 28 is formed in the holder 27. The diameter of the insertion hole 28 is set to be smaller than the diameter of the insertion hole 25 of the bracket 11. And bracket
The outer edge portion of the insertion hole 25 of 11 is configured as a chamfered portion 29, and the edge portions of both ends of the insertion hole 28 of the holder 27 are configured of chamfered portions 30 and 31, respectively.

In the above configuration, the cord inserted through the insertion hole 25 of the bracket 11 and the insertion hole 28 of the holder 27.
When power is supplied through 24, an electric current flows through the armature coil 17 via the brush 22 and the commutator 21 shown in FIG. Moreover, this current is switched by the commutator 21 according to the rotational position. Therefore, the rotor core 16 and the magnet
Mutual magnetic interaction with 18 will cause the rotor to rotate. This rotation comes to be taken out through the rotary shaft 12.

Moreover, in this motor, in order to eliminate the conventional problems, the chamfering 3 is previously performed in the insertion hole 28 separately from the bracket 11.
A holder 27 provided with 0 and 31 is prepared, and the holder 27 is set in the cord insertion portion inside the bracket 11, and the holder 27 prevents damage to the coating of the cord 24.

The holder 27 has chamfered portions at the inner and outer edges of the insertion hole 28 to form chamfered portions 30 and 31. Therefore, the directionality of the inside and outside of the holder 27 is eliminated, and the workability at the time of setting is improved. The diameter of the insertion hole 28 for inserting the cord 24 of the holder 27 is set to be slightly smaller than the diameter of the bracket 24 for inserting the cord 24.
It is designed so that the 27 may move a little or become out of size. Further, the bracket 11 is provided with a pocket 26 forming a guide structure for setting the holder 27 to prevent the holder 27 from moving, and the insertion hole 28 of the holder 27 is provided.
And the insertion hole 25 of the bracket 11 are accurately aligned with each other.

Therefore, according to such a structure, the insertion hole of the bracket 11
Since it is not necessary to chamfer the inner edge portion of 25, the cost can be reduced. Further, due to the guide structure including the pocket 26 for setting the holder 27, the mutual hole positions of the insertion hole 28 of the holder 27 and the insertion hole 25 of the bracket 11 are accurately aligned,
The code 24 is inserted smoothly, and the workability is very good. Moreover, since the structure is simple, it can be easily implemented even in a narrow space. Further, as the material of the bracket 11, the cord 24, etc., it is not necessary to select a special material for preventing the cord 24 from being damaged, and the degree of freedom in selecting the material of these members is expanded. In addition, such a structure allows anyone to work accurately, even if it is not a hot worker.

[Effect of device]

As described above, the present invention chamfers the edge of the insertion hole facing the outer surface of the wall portion, and provides the pocket inside the wall portion where the insertion hole is formed, and mounts the holder on the pocket. In addition, an insertion hole having a smaller radial dimension than the insertion hole of the wall portion and chamfered at both end edges is formed in the holder, and the cord inserted into the insertion hole of the wall portion is formed. Further, the holder is inserted through the insertion hole. Therefore, according to such a structure, the cord can be reliably positioned inside the wall portion by the insertion hole of the holder, and the cord can be surely prevented from being damaged at the edge portion inside the insertion hole of the wall portion. Will be prevented.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of an essential part showing a cord pulling-out device according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of a motor equipped with this pulling-out device, and FIG. It is a principal part expanded longitudinal cross-sectional view which shows the drawing apparatus of a code. The names of the main parts in the drawings are as follows. 11 …… Bracket 24 …… Cord 25 …… Insertion hole 26 …… Pocket 27 …… Holder 28 …… Insertion hole 29 to 31 …… Chamfer

Claims (1)

[Scope of utility model registration request] 1. A device in which a cord is drawn out through an insertion hole formed in a wall portion, the edge of the insertion hole facing the outer surface of the wall portion is chamfered, and the cord is inside the wall portion. A pocket is provided in the portion where the insertion hole is formed, and a holder is attached to the pocket. Further, the radial dimension of the wall portion is smaller than that of the insertion hole, and the edge portions at both ends are chamfered. A cord withdrawing device, characterized in that an insertion hole is formed in the holder, and the cord inserted into the insertion hole of the wall portion is further inserted into the insertion hole of the holder.