JPH11298983A - Monaural earphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monaural earphone that is provided with a cord winding mechanism with good operating convenience when winding the cord. SOLUTION: This monaural earphone 30 is provided with an earphone main body 12 and a cord winding mechanism 16 of a spiral spring type, that winds up freely a cord 14 connecting electrically to A/V equipment. The code winding mechanism is made up of a reel 22, to which one end of the cord is fixed and which winds up the cord while being turned around a rotary shaft, and a spiral spring drive mechanism that drives the rotary shaft, and when the earphone is not in use, the reel 22 winds up the cord. A rotary oil damper 32 that controls the torque of the rotary shaft caused by the spiral spring is provided to the rotary shaft. Thus, the cord is wound up at a nearly constant winding speed, regardless of fluctuations in the winding load, such as an external friction resistance with respect to the cord and a caught resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monaural earphone having a cord winding mechanism, and more particularly, to a monaural earphone having a cord durable and easy to use. .

[0002]

2. Description of the Related Art Small portable CD (compact disk) devices, portable tape recorders, portable radios, and other A-type devices.
/ V equipment often uses monaural earphones. Conventionally, a monaural earphone used in a portable A / V device is composed of an earphone body and a cord fixed at one end to the earphone body and connected to the other end with a plug for connection to the A / V device. Was composed. However, even when the monaural earphone is not used, since the long cord is extended for a long time, it is often troublesome that the cord is complicated on the way and forms a knot or is caught by something else. Was.

[0003] Accordingly, monaural earphones having a cord winding mechanism have been developed and used. Here, a configuration of a monaural earphone having a conventional cord winding mechanism will be described with reference to FIGS. FIG. 4 is an exploded perspective view showing a configuration of a monaural earphone having a conventional cord winding mechanism, showing a state in which the cord is wound, and FIG. FIG. 4 is a perspective view of a mounting plate to be attached to the device. As shown in FIG. 4, a monaural earphone 10 provided with a conventional cord winding mechanism freely winds an earphone body 12 and a cord 14 for electrically connecting the earphone body 12 to an A / V device. A spring-type cord take-up mechanism 16 is provided, and the whole is housed in a housing (not shown) of the A / V device. The cord take-up mechanism 16 is mounted on a mounting plate 18 shown in FIG. 5, and rotates with the rotating shaft 20 to take up the cord 14. The reel 22 is housed in a central recess of the reel 22 and drives the rotating shaft 20. A spring drive mechanism 22 is provided, and a pressing plate 24 having one end fixed to the reel 22 with a hinged joint and capable of opening and closing the spring drive mechanism 22 housed in a central recess of the reel 22 so as to be openable and closable. The monaural earphone 10 is fixed to a housing (not shown) of the A / V device via a mounting plate 18.

One end of the cord 14 is connected to the earphone body 12.
, The other end is fixed to the reel 22, and the A / V
It is connected to a connection terminal of a device (not shown). The mainspring drive mechanism 22 houses a mainspring (not shown) in which a belt-like plate or coil is spirally wound in a case 26 as a driving source. The center end of the mainspring is rotating shaft 2
0, and the outermost end of the spiral is fixed to the case 26. A spring is capable of storing a large rotation angle and energy in a small space, and is therefore frequently used in a cord winding device and the like. When the cord 14 is pulled out from the cord winding mechanism 16, the reel 22 and the rotating shaft 20 rotate together with the rewind of the cord 14 from the reel 22,
The mainspring contracts and accumulates spring force. Code 14
Is pulled out by a predetermined length, the reel 22 is locked by a lock (not shown) mechanism, and the cord 14 is not drawn out any longer. When winding the cord 14, when the lock mechanism is released, the cord 14 is mechanically wound around the reel by the spring force of the mainspring.
In FIG. 5, reference numeral 26 denotes a part of the lock mechanism.

When winding the cord 14, the cord 14
There are various winding loads such as a frictional resistance between the reel 14 and the cord 22, a snagging resistance between the cord 14 and the user's clothes and belongings, and a frictional resistance, and the winding load varies depending on the situation. Therefore, in order to accommodate the cord 14 in the reel 22 against the winding load, it is necessary to increase the spring strength of the mainspring of the mainspring cord winding mechanism 16.

[0006]

However, the conventional cord winding mechanism has the following problems because the spring strength of the mainspring spring is high. Firstly, in a situation where the winding load is small, the winding speed is increased,
There has been a problem that the earphone main body is rapidly pulled and collides with the winding mechanism, thereby damaging the earphone main body, and applying a large force to the cord due to overload, which may damage the cord and the like. Secondly, when the winding load during winding is low, the winding speed increases,
If you try to take up the earphone without holding the cord rewind mechanism of the earphone by hand, the cord rewind mechanism or the earphone may collide with your finger etc. due to the recoil of the rewind, and you may feel painful. Was. As described above, the monaural earphone provided with the conventional cord take-up mechanism is not easy to use when taking up the cord.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a monaural device having a cord winding mechanism which is easy to use when winding the cord at a constant speed regardless of the magnitude of the winding load of the cord. To provide earphones.

[0008]

SUMMARY OF THE INVENTION The present inventor has solved the problems of the conventional cord winding mechanism and has realized a monaural earphone having a cord winding mechanism which is easy to use when winding a cord. Next, we considered attaching a rotary damper to a rotating shaft. The rotary damper is a device that absorbs shocking rotational energy, and has a relationship between a rotational speed and a torque load as shown in FIG. As shown in FIG. 6, the torque load of the rotary damper increases as the rotation speed increases. By attaching such a rotary damper to the rotation shaft of the reel, when the rotation speed of the reel increases, the torque load increases, and an increase in the rotation speed of the reel can be suppressed. Conversely, when the rotation speed of the reel is low, the torque load is small, and the rotation speed of the reel is large. By providing a spring that generates a torque larger than the torque load of the rotary damper when the rotation speed of the reel is low, the reel can be rotated at a constant rotation speed and the cord can be wound at a substantially constant speed.

In order to achieve the above object, based on the above-mentioned findings, a monaural earphone according to the present invention has a mainspring for freely winding an earphone body and a cord for electrically connecting the earphone body to an A / V device. A spring-type cord take-up mechanism is provided.The cord take-up mechanism has a reel to which one end of the cord is fixed, and which rotates with the rotating shaft to take up the cord, and a mainspring drive mechanism that rotates the rotating shaft. In a monaural earphone in which the cord is wound around a reel when the earphone is not used, a damper for controlling the rotation force of the rotation shaft by a mainspring is provided on the rotation shaft.

The type of the damper used in the present invention is not limited as long as the rotational force of the rotating shaft by the mainspring can be controlled. Preferably, the damper is a rotary oil damper, and is provided at an end of the rotating shaft.
More preferably, the rotary oil damper is filled with a fixed inner cylinder, an outer cylinder outside the inner cylinder, which rotates around the rotation axis together with the rotation axis, and between the inner cylinder and the outer cylinder. And a viscous fluid. The viscous fluid means a fluid having a high viscosity, such as grease. The rotary oil damper is not limited to this, and may be, for example, one that rotates a blade in a viscous fluid. In a preferred embodiment of the present invention, the cord winding mechanism of the monaural earphone is housed in the housing of the portable A / V device.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment Example This embodiment is an example of an embodiment of a monaural earphone according to the present invention, FIG. 1 is an external perspective view of a monaural earphone of the present embodiment, FIG. 2 is an external perspective view of a damper, 3 is a sectional view of the damper. The monaural earphone 30 of the present embodiment has the same configuration as that of the conventional monaural earphone 10 except that a damper is provided on the head of the rotating shaft 20. As shown in FIG. 1, the monaural earphone 30 includes an earphone body 12 and a cord 14 having the same configuration as the conventional one, a cord winding mechanism 16 having the same configuration as the conventional one, and a rotating shaft 20 (FIG. 4) of the cord winding mechanism 16. (See FIG. 1). In FIG. 1, the winding direction of the cord 14 is opposite to the winding direction in FIG. 4, so that the direction of the earphone body 12 is also opposite to that in FIG.

As shown in FIG. 2, the rotary oil damper 32 has a mounting portion 3 fixed to a housing (not shown) of an A / V device having a monaural earphone 30.
4 and a cap-shaped rotating body 38 that is connected to the head of the rotating shaft 20 and rotates around a central axis 36 of the mounting portion 34. As shown in FIG. 3, the mounting portion 34 is formed of a columnar central axis 34 and an inner cylindrical portion 40 having a low height provided around the central axis 34.
As shown in FIG. 3, the cap-shaped rotator 38 includes a bearing portion 42 for rotatably receiving the center shaft 34 of the mounting portion 34.
And a cap-shaped member comprising an outer cylindrical portion 44 fitted outside the inner cylindrical portion 40 of the mounting portion 34 and a bottom 46 of the outer cylindrical portion 44, wherein the lower surface of the bottom 46 of the cap-shaped rotator 38 is , The center of which is coupled to the end of the rotating shaft 20. There is a space between the cap-shaped rotating body 38 and the mounting portion 34, that is, an annular space 48 between the inner cylindrical portion 40 and the bearing portion 42, an annular space 50 between the inner cylindrical portion 40 and the outer cylindrical portion 44, and the like. , Filled with grease.

With the above configuration, when the rotary shaft 20 is rotated by the driving force of the mainspring spring, the rotary oil damper 3 is rotated.
The second cap-shaped rotating body 38 rotates with respect to the mounting portion 34 while the rotation is suppressed by grease. As a result, the rotary oil damper 32 can control the rotation of the rotary shaft 20 with a torque load characteristic as shown in FIG.

Thus, when the cord 14 connected to the earphone body 12 is wound, the monaural earphone 30 of the present embodiment is not affected by load variations such as external frictional resistance and hooking resistance to the cord 14. The cord 14 can be wound at a substantially constant winding speed.

[0015]

According to the present invention, the earphone body is A / A
A monaural earphone having a mainspring-type cord winding mechanism that freely winds a cord electrically connected to the V device and that winds the cord around the cord winding mechanism when the earphone is not used. By providing a damper on the rotating shaft to control the rotating force of the rotating shaft, when the monaural earphone is not used,
Despite variations in the winding load such as external frictional resistance and hooking resistance to the cord, the cord can be wound at a substantially constant winding speed. This prevents damage to the earphone body, cord, etc., which has occurred with conventional monaural earphones, and
The usability of the earphone can be improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a monaural earphone according to an embodiment.

FIG. 2 is an external perspective view of a damper.

FIG. 3 is a sectional view of a damper.

FIG. 4 is an exploded perspective view of a conventional monaural earphone.

FIG. 5 is a perspective view of a mounting plate of a conventional monaural earphone, showing a state where a lead wire is wound up.

FIG. 6 is a graph showing characteristics of a rotary oil damper.

[Explanation of symbols]

10 ... Monaural with conventional cord winding mechanism
Earphones, 12: Earphone body, 14: Lead wire, 16: Spring-spring cord winding mechanism, 1
8 mounting plate, 20 rotating shaft, 22 reel
Reference numeral 24: holding plate, 26: case, 30: embodiment of monaural earphone according to the present invention, 32: rotary oil damper, 34: mounting portion, 36: central shaft, 38: cap Rotating body, 40 ... inner cylindrical part,
42 ... bearing part, 44 ... outer cylindrical part, 46 ... bottom part, 48 ... annular space, 50 ... annular space.

Claims (4)

[Claims] 1. An earphone body and an earphone body
A mainspring-type cord winding mechanism for freely winding a cord electrically connected to the / V device, wherein the cord winding mechanism has one end of the cord fixed, and rotates with the rotating shaft to wind the cord. In a monaural earphone having a reel and a mainspring drive mechanism for driving the rotary shaft to rotate, and winding the cord around the reel when the earphone is not used, a damper for controlling the rotational force of the rotary shaft by the mainspring is provided. A monaural earphone, which is provided on a rotating shaft. 2. The monaural earphone according to claim 1, wherein the damper is a rotary oil damper, and is provided at an end of the rotation shaft. 3. A rotary oil damper is filled between a fixed inner cylinder, an outer cylinder outside the inner cylinder, which rotates around the rotation axis together with the rotation axis, and between the inner cylinder and the outer cylinder. 3. The monaural earphone according to claim 2, comprising a viscous fluid. 4. The monaural earphone cord winding mechanism is housed in a housing of a portable A / V device.
Monaural earphones described in the item.