JP2500212Y2 - Cord winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a non-contact type cord winding device which is used for various electric appliances and the like and which winds and stores a cord.

2. Description of the Related Art In the conventional cord winding device of this type, as shown in FIG. 4, the non-drawing cord portion 10'b is the central shaft 5'of the case 1 ', more strictly speaking, the center. It is adapted to be wound around a boss portion 9'of a reel fitted on a shaft. Therefore, by pulling out the pull-out cord portion 10'a, the cord portion 10'b becomes the center of bending of the reel 3'while the non-pull-out cord portion 10'b changes from the expanded state to the reduced diameter state. There is a problem that the annular wall 8'does not bend smoothly from the penetrating locking portion, but abruptly bends in the vicinity of the boss portion 9 ', the stress becomes excessive and the wire is easily broken.

In the experiment conducted by the inventor, in contrast to the general standard that wire breaks should not occur after 5000 windings, in the conventional device, wire breaks occurred after 3000 windings. .

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a cord winding device capable of extending the service life of the non-drawing cord portion with less disconnection.

Means for Solving the Problems In order to achieve the above-mentioned object, according to the present invention, in the cord winding device as described above, the wall surface of the annular wall of the reel which faces the second winding portion protrudes from the center axis of the case. Not a flat surface. In this case, the winding shaft may be provided on the wall surface of the annular wall of the reel on the side of the second winding portion, in the vicinity of the boundary between the withdrawal cord portion and the non-withdrawal cord portion penetrating and locking the annular wall. .

Action With the above-described configuration, when the withdrawal cord portion is pulled out, the non-withdrawal cord portion is smoothly bent and wound at a position near the through locking portion of the annular wall of the reel, which is the center of bending, at a position close thereto. The stress change in the cord portion becomes gentle.

Embodiment 1 In FIGS. 1 to 3, 1 is a case, 2 is a case cover, and a reel 3 is supported by a central shaft 5 of the case 1 and is rotatable inside a hollow formed by the case 1 and the cover 2. The spring 6 is installed so as to be urged in one direction.

The reel 3 integrally has an annular wall 8 on the outer periphery of the boss portion 9 that guides the power cord, which will be described later, in two stages on the left and right sides so as to be wound, and one of which is separated by the annular wall. Is formed on the first winding portion A and the other surface side is formed on the second winding portion B with an axial width slightly larger than the width of the cord.

10 is a power cord, which is the first reel 3
It comprises a withdrawal cord portion 10a wound around the winding portion A and a non-withdrawing cord portion 10b wound around the second winding portion B. The withdrawal cord portion 10a is wound around the first winding portion A in the direction opposite to the biasing direction of the spring 6, and the outer end side is taken out to the outside from a cord withdrawing port (not shown) provided in the outer peripheral portion of the case 1. 12 is this withdrawal cord part
It is a plug attached to the outer end of 10a. Both boundary portions, which are the inner end side of the withdrawal cord portion 10a and the inner end side of the non-withdrawing cord portion 10b, are locked in through holes (not shown) provided in the annular wall 8 at a position eccentric from the center of the reel 3, The non-pull-out cord portion 10b whose inner end side is thus locked through is wound around the second winding portion B in the opposite direction to the pull-out cord portion 10a. Then, it is locked by a non-drawing cord portion withdrawing port 13 provided on the outer peripheral portion of the case 1 and taken out to the outside, and a crimp terminal (not shown) is attached to the outer end of the taken-out non-drawing cord portion 10b. ing. The wall surface of the annular wall 8 of the reel 3 facing the second winding portion B is the central axis 5
Also, the boss portion 9 is a flat surface that does not project, and the non-drawing cord portion 10b is wound at a position near the through lock at the boundary portion of both the drawing cord portions on the wall surface of the annular wall 8 which is the flat surface. A rotating winding shaft 15 is provided.

In the above description, the length of the non-withdrawal cord portion 10a of the cord 10 is shorter than the length of the withdrawal cord portion 10b, and is usually 2/3 of that. Also, the non-withdrawal cord part 10b
In the state in which the withdrawal cord portion 10a is completely wound around the first winding portion A of the reel 3, it is in a state where it is expanded to the maximum at the second winding portion B as shown in FIG.

 The operation of the above embodiment will be described.

In order to pull out the pull-out cord portion 10a from the case 1 from the state where the pull-out cord portion 10a of the cord 10 is completely wound around the first winding portion A of the reel 3 in the case 1, the cord portion 10a is pulled out from the cord pull-out opening. Pull out. By this drawing, the reel 3 is rotated in the direction of the arrow in FIG. 2 against the bias of the spring 6, and the cord portion 10 wound around the first winding portion A is shown.
a is gradually pulled out from the outlet.

When the withdrawal of the cord portion 10a is stopped at a predetermined length, the reel 3 is rotated in the opposite direction by the bias of the spring 6 to wind up the cord portion 10a. The rotation of the reel 3 is stopped by the operation of the stopper mechanism (not shown) provided, and the cord portion 10a is not wound any further, and is stopped at that position.

At this time, the non-drawing-out cord portion 10b wound around the second winding portion B of the reel 3 is expanded from the maximum state, and then the penetrating locking portion of the annular wall 8 of the reel 3, which is the center of bending, is pulled out. The diameter is reduced while being smoothly bent and wound around the nearby winding shaft 15. Therefore, the stress change in the cord portion 10b becomes gentle, and the stress does not become excessive. Then, when the cord portion 10a is completely pulled out of the case 1, the minimum diameter reduction state is obtained as shown in FIG.

Next, in order to wind the pull-out cord portion 10a of the cord 10 pulled out as described above around the first winding portion A of the reel 3, the cord portion 10a is pulled out again. As a result, the operation of the stopper mechanism is released, the reel 3 is rotated by the urging force of the spring 6, and the cord portion 10a is wound around the first winding portion A of the reel 3 before being pulled out.

At this time, the non-drawing cord portion 10b, which was in the smallest diameter-reduced state, is gradually expanded, and when the cord portion 10a is completely wound, it is in the original expanded state (the first state). (Fig. 2).

Since the structure and operation of the stopper mechanism described above are conventionally known, the description thereof will be omitted including the drawings.

Although the winding shaft 15 is provided in the above embodiment, it may be omitted.

Effect of the Invention In the device according to claim 1, the non-drawing cord portion is wound around a position near the through locking portion that is the center of bending to relieve the excessive stress of the cord portion. It is possible to reduce the number of wire breakage accidents that occurred in step # 3 as much as possible and extend the service life.

According to the second aspect of the present invention, the non-drawing cord portion can be wound around the winding shaft, and the winding shaft can prevent the second winding portion side of the case from being depressed.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a cord winding device showing an embodiment of the present invention, FIG. 2 is a vertical sectional side view taken along the line II-II of FIG. 1, and FIG. 4 is a drawing corresponding to FIG. 3 showing a conventional example. 1 ... Case, 2 ... Case cover, 3 ... Reel 5 ... Center axis, 6 ... Spring, 8 ... Annular wall, 10a ... Drawing cord part 10b ... Non-drawing cord part, 15 ... Winding Axis A: 1st winding section, B: 2nd winding section

Claims (2)

(57) [Scope of utility model registration request] 1. A reel having axially first and second take-up portions separated by an annular wall in a case is supported by a central axis of the case so as to be rotatable and biased in one direction. In this reel, one cord is provided with its withdrawal cord portion on the first winding portion in the direction opposite to the urging direction of the reel, and the non-drawing cord portion on the second winding portion. In a cord winding device in which a portion of the reel is wound around an annular wall of the reel at a position eccentric from the center, the wall surface of the annular wall of the reel facing the second winding portion is the central axis. A cord winding device having a flat surface that does not project. 2. The cord winding device according to claim 1,
It is characterized in that the winding shaft is provided on a wall surface of the annular wall of the reel on the side of the second winding portion, near a position where a boundary portion between the withdrawal cord portion and the non-withdrawal cord portion penetrates and is engaged with the annular wall. Cord winding device.