JPH0713346Y2 - Cord winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a cord winding device for winding a cord such as an earphone by rotating a cord winding portion and storing the cord.

[Summary of the Invention] The present invention relates to a cord winding device that winds a cord by rotating a cord winding portion by rotation of a rotation operating portion in a winding direction, wherein the rotation operating portion and the cord winding portion are respectively provided. It is provided separately and independently so as to be rotatable in the winding direction and the unwinding direction, and a cam whose distal end is movable by elastic deformation is provided in either one of the rotation operation portion and the cord winding portion, and A stopper is provided to prevent movement of the tip in the winding direction, and on the other hand, a locking part is provided that abuts against the end of the cam when the rotation operating part rotates, thereby keeping the rotation operating part in the winding direction. When rotated, the locking part hits the tip of the cam, and the stopper part stops the movement of this cam, and the locking part locks on the cam. When the operating part is rotated in the unwinding direction, the locking part Although it collides with the end of the cam, the tip of the cam moves due to elastic deformation and escapes, the locking part is not locked by the cam, the cord winding part is not rotated together with the rotation operating part, and the cord moves in the opposite direction. This prevents the cord from being wound in the reverse direction, and the cam is elastically deformed to escape from the locking part, so there is almost no wear of the cam and the unwinding direction of the rotary operation part is prevented. The damage to the cam and the like due to the application of an unreasonable torque is eliminated.

[Prior Art] Conventionally, for example, in a radio receiver or the like, there is a cabinet in which a take-up reel is rotatably provided, and the earphone cord can be taken up by rotating the take-up reel. As a known example of this,
There is a publication of 60-11583.

In this known example, a cord winding section is attached to a cabinet rotatably in both the winding direction and the unwinding direction, and the surface of the cord winding section is exposed to the outside of the cabinet. The cord is wound by rotating the portion in the winding direction, and the cord winding portion is rotated in the unwinding direction by pulling the cord to pull out the cord.

However, in the above-described known example, when the cord winding portion is mistakenly rotated in the unwinding direction when the cord is wound, a part of the cord may be bent and the cord may be wound in the opposite direction. Then, there is a problem that a part of the cord is bent and the internal lead wire is broken, and the cord is wound in the opposite direction, which hinders smooth rotation of the cord winding portion.

Therefore, in order to prevent the cord winding portion from being mistakenly rotated in the unwinding direction when winding the cord, the present applicant previously applied for Japanese Patent Application No. 62-34877.

In the prior invention, as shown in FIG. 4, a cord winding portion 13 and a rotation operating portion 16 are rotatably supported by a holder 1 in a winding direction (direction a) and a winding direction (direction b). ing. Engagement portions and engaged portions 30 are provided on the mutually opposing surfaces of the cord winding portion 13 and the rotation operating portion 16, respectively.
And are engaged only when the rotary operation portion 16 is rotated in the winding direction (direction a). Further, a rib 31 is formed on the outer circumference of the rotary operation portion 16, and a cam 32 is in contact with the rib 31.

The cam 32 is rotatably supported by a support shaft 33 formed integrally with the holder 1 so as to be rotatable in the directions of arrows c and d.
A tension coil spring 34 stretched between and is lightly urged in the direction of arrow d. And the cam 32 is the support shaft 33.
The distance from the cam surface 32a to the cam surface 32a is gradually reduced from the arrow c direction side to the arrow d direction side. Therefore, when trying to rotate the rotation operating part 16 in the winding direction (a direction), the cam 32 escapes in the arrow c direction with respect to the outer peripheral surface of the rib 31, so that the rotation operating part 16 moves in the winding direction (a direction). ) Rotation is possible. On the contrary, when the rotation operation portion 16 is rotated in the unwinding direction (b direction), the cam 32 causes the rib 31 to rotate.
Since it bites into the outer peripheral surface of the rib in the direction of the arrow d, the braking force by the lateral pressure is applied to the outer peripheral surface of the rib 31, and the rotation operating portion
16 is prevented from rotating in the unwinding direction (direction b). That is,
The rotation operating section 16 is configured to be rotatable only in the winding direction at an upper position of the cord winding section 13 independently of the cord winding section 13.

When the stored earphone 7 is pulled, only the cord winding section 13 rotates and the cord 8 is pulled out. To store the pulled-out cord 8, the rotation operation portion 16 is rotated in the winding direction (direction a). Then, the engaging portion is engaged with the engaged portion 30, the cord winding portion 13 rotates together with the rotation operating portion 16, and the cord 8 is wound. At the time of this winding, if the rotation operating portion 16 is mistakenly rotated in the unwinding direction (b direction), the rotation of the rotating operating portion 16 is prevented by the cam 32 in the unwinding direction (b direction). It Therefore, the cord winding portion 13 is also prevented from being rotated in the unwinding direction (b direction), and the cord 8 is reliably prevented from being bent and wound in the opposite direction.

[Problems to be Solved by the Invention] However, since the rotation of the cord winding portion 13 in the unwinding direction (direction b) is prevented by making the cam 32 bite into the rotation operation portion 16, wear of the cam 32 is prevented. Extremely inferior in durability. Further, there is a drawback in that the cam 32, the support shaft 33, and the like are damaged if an unreasonable rotational force is applied in the unwinding direction (b direction) even though the rotation operating portion 16 does not rotate in the unwinding direction (b direction). there were.

Therefore, an object of the present invention is to provide a cord winding device in which the above-mentioned drawbacks are eliminated by making the rotation of the rotation operation portion rotate in the unwinding direction.

[Means for Solving the Problems] The cord winding device of the present invention for achieving the above object is
A cord winding unit configured to be rotatable in a winding direction and a winding direction, and a winding direction and an unwinding direction which have the same rotation axis center as the cord winding unit and are independent of the cord winding unit. Attached to any one of the rotation operating portion configured to be rotatable and the cord winding portion and the rotation operating portion, and its tip end is movable in the winding direction and the unwinding direction by elastic deformation. A cam, a stopper portion fixed to the same member to which the cam is attached to prevent movement of the tip end portion of the cam in the winding direction, and the cord winding portion or the rotation member which is a member to which the cam is not attached. A locking portion that is attached to the operation portion and that abuts against the tip end portion of the cam when the rotation operation portion is rotated.

[Operation] When the rotation operating portion is rotated in the winding direction, the locking portion abuts against the end of the cam, and the movement of the cam is blocked by the stopper portion. The cord winding section is rotated to wind the cord. At this time, if the rotation operation part is also rotated in the unwinding direction, the locking part abuts against the tip part of the cam, but the tip part of the cam moves due to elastic deformation and escapes, and the locking part is not locked to the cam. Therefore, the cord winding portion is not rotated together with the rotation operation portion, and the cord is prevented from being wound in the opposite direction. That is, since the cam is prevented from being wound in the reverse direction by escaping from the engaging portion by elastic deformation of the cam, the cam is hardly worn. In addition, since the rotation operation unit rotates idly, there is no damage to the cam or the like due to the action of an unreasonable torque.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS.

1 to 3, the holder 1 is provided with a battery storage portion 2 at one end and an earphone storage portion 3 at the other end. The lids 2a and 3a are attached to the flat side of the holder 1, respectively. A base portion mounting hole 4 is formed in the center of the holder 1, and the base portion mounting hole 4 is surrounded by a ring-shaped wall portion 5. A hole 6 communicating with the inside of the earphone housing 3 is formed in the wall portion 5, and the earphone 7 is formed through the hole 6.
The cord 8 is guided into the base mounting hole 4. or,
Locking holes 9 are formed in the wall portion 5 at several places, and the locking projections 10c of the base portion 10 are inserted into the locking holes 9 to attach the base portion 10 to the holder 1. The base portion 10 is provided with an outer peripheral wall 10b outside the peripheral wall 10a.
The locking projection 10c is provided on the outer surface of b. Further, a center hole 10d is formed at the center of the base portion 10 and the center hole 1d is formed.
A shaft 17 described below is inserted through 0d, and a positioning hole 10e for positioning the fixed slip ring 11a of the slip ring unit 11 is formed near the center hole 10d.

The slip ring unit 11 is a fixed slip ring 11a.
And a movable slip ring 11b are rotatably configured, a central hole 11c is formed in the center thereof, and positioning pins 11d (not shown) are provided on the outer surfaces of the fixed and movable slip rings 11a and 11b, respectively. Has been. The positioning pin 11d of the fixed slip ring 11a is inserted into the positioning hole 11e of the base portion 10, and the positioning pin (not shown) of the movable slip ring 11b is inserted into the positioning hole (not shown) of the cord winding portion 13. ing. Fixed slip ring 11
a is supported and fixed by the base portion 10, and the movable slip ring 11b is supported by the cord winding portion 13 and is fixed by the cord winding portion 13.
Rotate with.

The cord winding portion 13 includes a central hub portion 13a, an upper flange portion 13b and a lower flange portion 1 extending from the outer periphery of the hub portion 13a.
Composed of 3c and. A center hole 13d is formed in the center of the hub portion 13a, and the boss portion 16a of the rotation operating portion 16 is inserted into the center hole 13d so that the cord winding portion 13 can wind in the winding direction (direction a) and in the winding direction (direction a). It is configured to be rotatable in the (b direction). Also, the hub
A slip ring storage chamber 13e is formed in 13a, and the slip ring unit 11 is installed in this slip ring storage chamber 13e.
Are arranged. Further, a hole (not shown) is formed in the hub portion 13a, the end of the cord 8 is fixed to the hub portion 13a, and the tip of the cord 8 is guided to the slip ring storage chamber 13e through this hole. The tip of the cord 8 is connected to the movable slip ring 11b. A cord storage space is provided between the upper flange portion 13b and the lower flange portion 13c.
13f is configured, and the cord winding portion 13 is in the winding direction (direction a).
When the cord 8 is rotated, the cord 8 is wound around the cord storage space 13f. Further, in the upper flange portion 13b, a long hole 13g and a support hole 13h are formed on a parallel line B of a line A passing through the diametrical direction. The elongated hole 13g has a longitudinal direction on the parallel line B, and restriction walls 13i project from both sides of the elongated hole 13g. The cam 14 is attached to the elongated hole 13g and the support hole 13h.

The cam 14 includes an elongated flexible portion 14a and a plate-shaped rotating portion 14b to which one end of the flexible portion 14a is connected. Flexible part 1
A moving pin 14c is provided at the free end of 4a so as to project downward, and the moving pin 14c is inserted into the elongated hole 13g. Rotating part 14b
A rotation pin 14d is provided so as to project downward near the connection point of the flexible portion 14a, and the rotation pin 14d is inserted into the support hole 13h. When a rotational force acts on the tip of the rotating portion 14b of the cam 14 in the winding direction (direction a) or the unwinding direction (direction b), for example, as shown by the alternate long and short dash line in FIG. The flexible part 14a is flexed by elastic deformation as it moves in 13g, and the flexure causes the rotary part 14b to rotate by a predetermined angle in the winding direction (a direction) and the unwinding direction (b direction) about the rotation pin 14d as a fulcrum.
When the rotational force is released, the elastic force restores the original state.

A stopper portion 15 is integrally formed on the upper flange portion 13b. The stopper portion 15 contacts the rotating portion 14b of the cam 14 to prevent the rotating portion 14b from rotating in the winding direction (direction a). Therefore, the rotating portion 14b of the cam 14 rotates only when the rotational force in the unwinding direction (direction b) acts.

The rotation operation portion 16 is arranged at a position where the upper surface thereof is exposed to the holder 1, and a boss portion 16a is provided at the center thereof so as to project downward. A shaft hole 16b is formed in the boss portion 16a, and the shaft 17 is press-fitted into the shaft hole 16b. As described above, the boss portion 16a and the shaft 17 are the central holes of the cord winding portion 13 and the like.
13d, 11c, 10d, the rotation operating portion 16 has the same rotation axis center as the cord winding portion 13, and is independent of the cord winding portion 13 in the winding direction (direction a). It is configured to be rotatable in the outgoing direction (direction b). The tip of the shaft 17 projects toward the lower surface of the base portion 10, and a retaining ring 18 is fixed to this projecting portion. A locking portion 19 is integrally formed on the lower surface of the rotary operation portion 16 so as to project symmetrically with respect to the center of rotation. The locking portion 19 is provided on a rotation locus intersecting with the rotating portion 14b of the cam 14, and is configured to abut the tip of the rotating portion 14b of the cam 14 when the rotation operation portion 16 rotates. Further, a hole 16c is formed in the rotation operating portion 16 and the hole 1c is formed.
The finger hook 20 is fitted to 6c.

The operation of the above configuration will be described below.

When the earphone 7 stored in the earphone storage portion 3 is pulled, the cord winding portion 13 and the rotation operation portion 16 are both rotated in the unwinding direction (b direction) by this tensile force, and the cord 8 is pulled out. In order to wind the pulled-out cord 8 around the cord winding portion 13, a finger is put on the finger hooking portion 20 to rotate the rotation operating portion 16 in the winding direction (direction a). Then, the locking portion 19 of the rotation operating portion 16 abuts against the tip of the rotating portion 14b of the cam 14. The rotation of the cam 14 is blocked by the stopper portion 15 and the locking portion 19 is locked to the cam 14, so that the cord operating portion 16 and the cord winding portion 13 are locked together.
The cord 8 is wound by rotating in the winding direction (direction a).

At the time of this winding, it is assumed that the rotation operation portion 16 is mistakenly rotated in the unwinding direction (direction b). Then, the locking portion 19
It hits the tip of the rotating part 14b of 14. When the locking portion 19 further advances in the unwinding direction (direction b), the cam force is generated by the rotation force of the locking portion 19.
The flexible portion 14a of 14 bends, and the rotating portion 14b unwinds (direction b).
Rotate to. When the tip of the rotating portion 14b of the cam 14 escapes to a position where it does not engage with the engaging portion 19, the engaging portion 19 moves in the unwinding direction (b
Direction) and the cam 14 returns to its original state. Then, the rotational force of the rotation operating portion 16 is not transmitted to the cord winding portion 13, and only the rotation operating portion 16 rotates to rotate the cord winding portion 13.
Does not rotate. Therefore, the cord winding section 13 has the cord 8
Does not wind in the opposite direction.

When the locking portion 19 hits the cam 14, the cam 14 elastically deforms and escapes from the locking portion 19, so that the cam 14 is hardly worn. In addition, the cam 14 does not receive an unreasonable torque.
The 14th magnitude will not be damaged.

In this embodiment, the cord winding portion 13 is provided with the cam 14 and the stopper portion 15 and the rotation operating portion 16 is provided with the locking portion 19, but the cord winding portion 13 has the opposite structure. The locking portion 19 may be provided, and the rotation operating portion 16 may be provided with the cam 14 and the stopper portion 15.

In addition, in this embodiment, the cord winding portion 13 is provided with a stopper portion.
Since 15 is integrally formed and the locking portion 19 is integrally formed with the rotation operation portion 16, since only the cam 14 is the only component as the reverse winding prevention means, there is an advantage that the number of components is small and assembly is easy. .

[Advantages of the Invention] As described above, according to the present invention, the rotation operating portion and the cord winding portion are separately and independently rotatably provided in the winding direction and the winding direction, and the rotation operating portion and the cord winding portion are provided. A cam whose distal end is movable by elastic deformation is provided on either one of the cord winding parts, and a stopper part for preventing movement of the tip of the cam in the winding direction is provided on the other side, and the rotation operation is provided on the other side. Since the locking part that abuts against the end of the cam when the part rotates is provided, the cam is prevented from being wound in the reverse direction by the elastic deformation of the cam to escape from the locking part, and there is almost no wear of the cam. The present invention has an effect that damage to the cam and the like caused by applying an unreasonable rotational force in the unwinding direction of the rotation operation unit is eliminated.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a plan view of a cord winding device, FIG. 2 is an exploded perspective view of the cord winding device seen from the bottom side, and FIG. FIG. 4 is a sectional view taken along the line AA of FIG. 1, and FIG. 4 is a partially cutaway plan view of a conventional cord winding device. 13 ... Cord winding section, 14, 32 ... Cam, 15 ... Stopper section, 16
... Rotating operation part, 19 ... engaging part, a ... winding direction, b ... unwinding direction.

Claims (1)

[Scope of utility model registration request] 1. A cord winding portion configured to be rotatable in a winding direction and a winding direction, and a winding portion having the same rotation axis center as that of the cord winding portion and independent of the cord winding portion. Attached to either one of the rotation operating portion, which is configured to be freely rotatable in the winding direction and the winding direction, and the cord winding portion and this rotation operating portion, and the tip end portion thereof is wound and unwound by elastic deformation. Direction movable cam, a stopper portion fixed to the same member to which the cam is attached to prevent movement of the tip end portion of the cam in the winding direction, and the cord winding that is a member to which the cam is not attached. A winding part of the rotation operating part, which is attached to the take-up part or the rotation operating part, and is provided with a locking part which is located at a position where the rotation operating part does not hit the stopper part but hits the tip of the cam when the rotation operating part is rotated. When rotating in the take-up direction, the locking part Abuts against the front end portion of the cam, and,
Movement of the tip portion of the cam is blocked by the stopper portion, the locking portion is locked to the tip portion of the cam, and the locking portion causes the cam to move when the rotation operation portion rotates in the unwinding direction. When it hits the tip of the cord, the tip of the cam moves in the unwinding direction due to elastic deformation of the cam to release the locking with the locking portion.