JP4329985B2 - Flat cable winder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flat cable winder capable of winding and unwinding a flat cable following the movement of a moving body such as a cover of an electric device or a door of an automobile.
[0002]
[Prior art]
Flat cables have been used for electrical wiring of electrical equipment and automobiles. The flat cable has a structure in which flat insulating coatings made of plastic such as polyethylene terephthalate are collectively coated on flat conductors made of strip conductors such as copper and aluminum arranged in parallel.
[0003]
In the conventional flat cable winder, as shown in FIG. 4, the casing 1 is divided into halves 1a and 1b, and the winding core 2 that does not rotate at the center in the lower half 1a is upward. A part of the flat cable 3 on the winding start end 3a side is fixed to the winding core 2, and the winding start end 3a side is taken out from the long hole 4 in the center of the half split body 1a. 3 is connected to the winding start end 3a side and a leaf spring 9 having a base end fixed to the winding core 2 is spirally wound around the outer periphery of the winding core 2, and the winding end 3b side of the flat cable 3 is placed on the casing. 1 by going out from the cable entry / exit 5 on the side wall of 1 and covering the half-split body 1a with the half-split body 1b and screwing it into the core 2 through the screw 6 from the center hole 6 of the half-split body 1b. The casing 1 is configured by connecting the split bodies 1a and 1b (for example, patents). Document 1 reference.).
[0004]
In such a flat cable winder, as shown in FIG. 5, the spiral winding of the flat cable 3 is caused by the elasticity of the leaf spring 9 and the flat cable 3. Due to its own elasticity, it spreads in the radial direction A, thereby increasing the circumferential length of each winding layer of the spiral flat cable 3, thereby generating a force in the B direction for drawing the flat cable 3, and from the cable inlet / outlet 5. The flat cable 3 is drawn in the C direction, and as a result, the flat cable 3 is wound.
[0005]
According to such a flat cable winder, even when the flat cable 3 is wound and unwound as the moving body supporting the winding end 3b side of the flat cable 3 moves, the electrical connection state is maintained. become.
[0006]
[Patent Document 1]
JP 2001-128350 A
[Problems to be solved by the invention]
However, in the conventional flat cable winder as described above, the winding end 3b side fed out from the outermost layer of the flat cable 3 is on the inner wall of the housing 1 in the vicinity of the cable inlet / outlet 5 of the housing 1. Since it comes out in contact with a considerable length, the casing 1 hinders the outermost layer of the wound layer of the flat cable 3 from spreading in the radial direction, and the outermost layer of the wound layer of the flat cable 3 The mechanical contact resistance due to contact with the casing 1 with a considerable length is increased, and when the flat cable 3 is wound around the outer periphery of the winding core 2, the winding is stopped halfway. There was a risk that winding would be incomplete.
[0008]
The object of the present invention is to prevent the outermost layer of the flat cable winding layer from spreading in the radial direction, and the winding end end fed out from the outermost layer of the flat cable contact the inner wall of the housing. An object of the present invention is to provide a flat cable winder that can reduce the length of the cable.
[0009]
[Means for Solving the Problems]
In the present invention, the flat cable is spirally wound around the outer periphery of a non-rotating winding core provided in the casing and accommodated in the casing, and the winding end end side of the flat cable is moved out of the casing A flat cable winder that is connected to a body and is configured to wind and unwind the flat cable following the movement of the winding end is intended. In the flat cable winder targeted by the present invention, the winding of the flat cable is not caused by the spiral winding layers of the flat cable but by the elasticity of the flat cable itself in the radial direction. This is done by increasing the circumference .
[0010]
In the flat cable winder according to the present invention, the winding end end drawn out from the outermost layer of the flat cable winding layer formed in the casing is first placed on the inner wall of the casing in the vicinity of the cable inlet / outlet of the casing. The outer space of the flat cable is provided in the housing in front of the contact point, and this expansion space does not prevent the outermost layer of the flat cable from expanding in the radial direction during winding of the flat cable. It is provided as follows. In addition , the inner wall of the housing is formed such that a portion extending from the expanding space side to the cable entry / exit through a portion serving as the contact has an inwardly convex curved shape .
[0011]
In this way, the end of winding end drawn out from the outermost layer of the flat cable winding layer formed in the housing is located near the cable inlet / outlet of the housing and in front of the contact point that first contacts the inner wall of the housing. If the outer space of the outermost layer of the flat cable is provided in the housing, the outer surface of the outer layer of the flat cable will be prevented from expanding radially by the outer space of the flat cable. Therefore, the force for pulling the flat cable into the housing can be increased compared to the conventional case. In addition, due to the presence of the outermost layer spreading space of this flat cable, the length at which the winding end end drawn from the outermost layer of the flat cable winding layer comes into contact with the inner wall of the housing is shortened, and the contact resistance is reduced. Occurrence of a situation where the winding of the flat cable stops midway can be prevented, and the winding of the flat cable can be performed stably.
[0012]
In this case, the expanding space may be formed by one corner portion of a substantially rectangular casing, or may be formed by a substantially circular casing. It may be formed so as to protrude from the top.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing a first example of an embodiment of a flat cable winder according to the present invention. Note that portions corresponding to those in FIG. 4 described above are denoted by the same reference numerals.
[0014]
In the flat cable winder of this example, a rectangular one is used as the housing 1. The winding end 3b drawn from the outermost layer 3c of the spiral wound layer of the flat cable 3 formed in the casing 1 is on the inner wall of the casing 1 in the vicinity of the cable inlet / outlet 5 of the casing 1. An expansion space 8 of the outermost layer 3c of the flat cable 3 is provided in the housing 1 at a position in front of the contact P that contacts first. In this example, the wide space 8 is formed inside the corner portion 1c of the rectangular casing 1. The cable entrance / exit 5 is formed in the middle of the adjacent corner portion 1c of the rectangular casing 1. As is clear from FIG. 1, the portion extending from the expanding space 8 side of the inner wall of the housing 1 to the cable entrance / exit 5 through the portion that becomes the contact P is formed to have a curved surface that is convex inward. . The winding end 3b of the flat cable 3 is connected to a moving body such as a cover of an electric device or an automobile door, and the casing 1 having the winding start end 3a is supported on the main body side of the electric device or the main body side of the automobile. Has been.
[0015]
In the flat cable winder having such a configuration, the spiral winding of the flat cable 3 is caused by the spiral winding layers of the flat cable 3 spreading in the radial direction A due to the elasticity of the flat cable 3 itself. As a result, the circumferential length of each winding layer becomes longer, and a force in the B direction for drawing the flat cable 3 is generated, and the flat cable 3 is drawn in the C direction from the cable inlet / outlet 5. Is done. In the flat cable winder having such a structure, the number of turns when the flat cable 3 is wound as shown by the solid line is the same as the number of turns when it is rewound as shown by the broken line.
[0016]
Thus, the position before the contact P where the winding end 3b side fed out from the outermost layer 3c of the winding layer of the flat cable 3 first contacts the inner wall of the casing 1 in the vicinity of the cable entrance / exit 5 of the casing 1 If the expansion space 8 of the outermost layer 3c of the flat cable 3 is provided in the casing 1 of the flat cable 3, the outermost layer 3c of the winding layer of the flat cable 3 is radially expanded by the expansion space 8 of the outermost layer 3c of the flat cable 3. The force of pulling the flat cable 3 into the housing 1 can be increased compared to the conventional case without obstructing the expansion. Further, due to the presence of the spreading space 8 of the outermost layer 3c of the flat cable 3, the length of the winding end 3b drawn from the outermost layer 3c of the winding layer of the flat cable 3 contacts the inner wall of the housing 1 is shortened. The occurrence of such a situation that the contact resistance is reduced and the winding of the flat cable 3 stops in the middle can be prevented, and the flat cable 3 can be wound stably.
[0017]
Further, according to the rectangular casing 1, the wide space 8 can be easily formed by using the corner portion 1c.
[0018]
FIG. 2 is a cross-sectional view showing a second example of the embodiment of the flat cable winder according to the present invention. Note that portions corresponding to those in FIG. 1 described above are denoted by the same reference numerals.
[0019]
In the flat cable winder of this example, the casing 1 has a substantially circular cross section. The winding end 3b drawn from the outermost layer 3c of the spiral wound layer of the flat cable 3 formed in the casing 1 is on the inner wall of the casing 1 in the vicinity of the cable inlet / outlet 5 of the casing 1. An expansion space 8 of the outermost layer 3c of the flat cable 3 is provided in the housing 1 at a position in front of the contact P that contacts first. In this example, the wide space 8 is formed inside the substantially circular casing 1. Also in this example, as is apparent from the drawing, the portion extending from the side of the inner wall 8 of the housing 1 to the cable entry / exit 5 through the portion that becomes the contact point P from the side of the space 8 is formed so as to exhibit a curved surface that is convex inward. Has been.
[0020]
Even with such a structure, the same effect as in the first example can be obtained. Moreover, according to the substantially circular housing | casing 1, formation of the expansion space 8 can be easily performed by utilizing the circular shape.
[0021]
FIG. 3 is a cross-sectional view showing a third example of the embodiment of the flat cable winder according to the present invention. Note that portions corresponding to those in FIG. 1 described above are denoted by the same reference numerals.
[0022]
In the flat cable winder of this example, the casing 1 has a substantially rectangular cross section. The end of winding 3b drawn from the outermost layer 3c of the spirally wound layer of the flat cable 3 formed in the casing 1 is on the inner wall of the casing 1 in the vicinity of the cable inlet / outlet 5 of the casing 1. An expansion space 8 of the outermost layer 3c of the flat cable 3 is provided in the housing 1 at a position in front of the contact P that contacts first. In this example, the wide space 8 is formed on the inner side of one side surface 1d of a substantially rectangular casing that protrudes outward in an arc shape. Also in this example, as is apparent from the drawing, the portion extending from the side of the inner wall 8 of the housing 1 to the cable entry / exit 5 through the portion that becomes the contact point P from the side of the space 8 is formed so as to exhibit a curved surface that is convex inward. Has been.
[0023]
Even with such a structure, the same effect as in the first example can be obtained. Moreover, according to the substantially rectangular housing 1, the wide space 8 can be easily formed by projecting one side surface 1d outward in an arc shape .
[0024]
【The invention's effect】
In the flat cable winder according to the present invention, the winding end end drawn out from the outermost layer of the flat cable winding layer formed in the casing is first placed on the inner wall of the casing in the vicinity of the cable inlet / outlet of the casing. Since the outer space of the outermost layer of the flat cable is provided in the housing in front of the contact point, the outermost layer of the flat cable is expanded in the radial direction by the outer space of the outer layer of the flat cable. it is not possible from the wax housing inhibits, can be increased compared with the prior art force pulling the flat cable in the housing. In addition, due to the presence of the outermost layer spreading space of this flat cable, the length at which the winding end end drawn from the outermost layer of the flat cable winding layer comes into contact with the inner wall of the housing is shortened, and the contact resistance is reduced. Occurrence of a situation where the winding of the flat cable stops midway can be prevented, and the winding of the flat cable can be performed stably.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first example of an embodiment of a flat cable winder according to the present invention.
FIG. 2 is a cross-sectional view showing a second example of the embodiment of the flat cable winder according to the present invention.
FIG. 3 is a cross-sectional view showing a third example of the embodiment of the flat cable winder according to the present invention.
FIG. 4 is a perspective view of an assembling process of a conventional flat cable winder.
FIG. 5 is an explanatory diagram of a winding operation of a conventional flat cable winder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing | casing 1a, 1b Half-divided body 1c Corner part 1d Side surface 2 Winding core 3 Flat cable 3a Winding start end 3b Winding end 3c Outermost layer 4 Long hole 5 Cable entrance / exit 6 Hole 7 Screw 8 Expansion space 9 Leaf spring

Claims (4)

A flat cable is spirally wound around the outer periphery of a non-rotating winding core provided in the casing and accommodated in the casing, and the end of the flat cable winding is taken out of the casing and connected to the moving body The flat cable is wound and unwound in accordance with the movement of the winding end, and the flat cable is wound with each spiral winding layer of the flat cable being a spring. In the flat cable winder that is performed by extending the circumference of each winding layer by extending in the radial direction due to the elasticity of the flat cable itself instead of
The end of winding end drawn out from the outermost layer of the flat cable winding layer formed in the casing is positioned near the cable inlet / outlet of the casing and in front of the contact point that first contacts the inner wall of the casing. The casing is provided with a space for spreading the outermost layer of the flat cable,
The spreading space is provided so as not to hinder the outermost layer of the flat cable from expanding in the radial direction during winding of the flat cable,
A flat cable winder characterized in that a portion of the inner wall of the housing that reaches the cable entry / exit through a portion that becomes the contact point from the spreading space side has an inwardly convex curved shape.   2. The flat cable winder according to claim 1, wherein the expanding space is formed by one corner portion of the substantially rectangular casing.   2. The flat cable winder according to claim 1, wherein the casing has a substantially circular cross section, and the expanding space is formed inside the casing having a circular cross section. .   2. The flat cable winder according to claim 1, wherein the expanding space is formed by projecting one side surface of the substantially rectangular casing outward in an arc shape.

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