JPH1155778A - Cord reel for earphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily carry an earphone for a portable telephone set/radio receiver. SOLUTION: A cord reel 1 is made up of a housing 10, a wheel 50 fitted turnably with respect to the housing 10, a coil spring that energizes the wheel 50 in a winding direction of a cord 8, and a brake 17 suppressing the turning of the wheel 50 in the winding direction. When an extension/contraction part 8A of the cord 8 is extended to the outside of the housing 10, the wheel 50 is turned and the spring is energized. The wheel 50 is not turned in a direction of winding the extension/contraction part 8A of the cord 8 through the action of the brake 17. When the brake 17 is released, the wheel 50 is automatically turned in a winding direction of the cord 8 through the action of the energized spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel for retrievably winding a cord of an earphone used for a portable telephone, a portable radio or the like.

[0002]

2. Description of the Related Art Conventionally, a portable radio which can use an earphone and which has a mechanism for rewinding a cord of the earphone so as to be able to be pulled out is well known. In addition, earphones that are separate from and detachable from mobile phones and portable radios are also well known.

[0003]

In earphones that can be attached to and detached from a mobile phone or a portable radio, it is difficult to store a long cord so that it does not get in the way, regardless of whether it is used.

Accordingly, an object of the present invention is to provide a cord reel that allows the cord of an earphone to be pulled out by a required length and that can store an extra cord compactly.

[0005]

In order to solve the above-mentioned problems, the present invention is based on a cord reel for rewinding a cord of an earphone so that the cord can be pulled out.

According to the present invention based on such a premise, the code reel is configured as follows. The code reel is rotatably mounted in the housing having a housing having an upper surface portion, a lower surface portion, and a peripheral wall portion interposed between the both surface portions, and winds one end of the code so as to be able to be pulled out. And a coil spring capable of automatically rotating the wheel in the winding direction of the cord, and releasably engaging the wheel to inhibit the automatic rotation of the wheel. And brake means that can be used. The housing has an opening in the peripheral wall portion through which one end of the cord can be wound and pulled out, and the lower surface of the housing extends at an end opposite to the one end of the cord. It has a circular hole that can be put out. The wheel has an axial direction extending in a vertical direction of the housing,
A hollow cylindrical portion rotatably fitted in the circular hole in a circumferential direction thereof; and a disk-shaped portion extending radially outward from an axially intermediate portion of the cylindrical portion and bisecting the housing in the vertical direction. The disc-shaped portion forms a storage portion for accommodating the coil spring in a lower portion from the intermediate portion together with the housing lower surface portion, and an upper portion of the cylindrical portion from the intermediate portion has an outer periphery on the outer periphery thereof. A cord insertion portion that can take up a cord, can extend the cord between the inside and outside of the cylindrical portion on a peripheral wall of the portion, and can fix a part of the extended cord. Are formed. The coil spring has an inner end fixed to the cylindrical portion in the storage portion, and is wound around the outer periphery of the cylindrical portion in a direction opposite to a winding direction of the cord, and an outer end of the spring. A part is fixed to the housing. An operating portion slidable along the peripheral wall portion outside the housing peripheral wall portion; and a brake means coupled to the operation portion and detached from the wheel inside the peripheral wall portion under a spring bias with respect to the wheel. To prevent the automatic rotation of the wheel and allow the cord wound around the cylindrical portion to rotate in the pull-out direction in a direction opposite to the rotation direction. The operating portion is formed so as to be slidable in a direction in which the operating portion is separated from the wheel against the bias of the spring.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cord reel for an earphone according to the present invention.
It is as follows.

FIG. 1 is a perspective view showing a use state of a cord reel 1 and an earphone 2 detachably connected to a handset 3 of a portable telephone via the reel 1. The earphone 2 is a conventional one, and includes an ear plug 6 having a built-in microphone, a plug 7 for the handset 3, and a cord 8 extending between the plugs 6 and 7. The reel 1 has an upper surface 11, a lower surface 12,
The housing 10 includes a peripheral wall portion 13 interposed between the first and second cords 12, and the telescopic portion 8 </ b> A of the cord 8 on the plug 6 side can be pulled out and wound from the opening 14 of the peripheral wall portion 13. On the other hand, the fixed length portion 8B of the cord 8 on the plug 7 side extends from the first circular hole 16 (see FIG. 2) formed substantially in the center of the lower surface portion 12. The operating portion 18 of the brake 17 is provided on the peripheral wall portion 13 of the housing 10.
When the operating portion 18 slides in the direction of the arrow A in a state where the housing A is not wound up and the operation of the brake 17 is released, most of the telescopic portion 8A is largely removed
It is automatically wound up inside 0.

FIGS. 2 and 3 are a perspective view taken along line II-II of FIG. 1 and a partial exploded perspective view of the reel 1 in the vertical direction, in which the code 8 is indicated by a virtual line. The housing 10 is composed of an upper member 31 having an upper surface 11 and a lower member 32 having a lower surface 12.
The peripheral wall portions 31A and 32A formed on the housing 2 are joined to each other at their edges to form the peripheral wall portion 13 of the housing 10. A relatively large second circular hole 33 is formed in the upper member 31, and the upper surface portion 1 is formed around the second circular hole 33.
1 is extended. Second circular hole 33 and opening 1 of peripheral wall portion 13
4, a code guide portion 34 formed by lacking a part of the upper surface portion 11 extends. 2nd circular hole 3
A fitting portion 36 for the upper wheel 51 is formed at the periphery of the lower wheel 3 by lowering the upper surface portion 11.
A columnar portion 31 </ b> C hangs from the lower surface of the upper surface 11 toward the lower member 32.

The lower member 32 of the housing 10 has a relatively small first circular hole 16 substantially at the center of the lower surface portion 12, and the lower end of the circular hole 16 is chamfered 16A. The lower member 32 has a mounting groove 37 for the brake 17 formed by cutting out a part of the peripheral wall 32A,
The support wall 3 for the brake 17 is provided inside the groove 37.
8 are formed. In the vicinity of the support wall 38, a portion 32B of the peripheral wall portion 32A is curved inward of the lower member 32. Outside the curved portion 32B, a cylindrical fitting portion 32C extending toward the upper member 31 is fitted to the columnar portion 31C of the member 31.

The housing 10 is provided with a winding wheel 50 for winding the cord 8. The wheel 50 is
It is composed of an upper wheel 51, a lower wheel 52, and a coil spring 53. The upper wheel 51 has a first disc-shaped portion 56 and a cylindrical first shaft portion 57 extending downward from the center of the lower surface of the disc-shaped portion 56, and the first disc-shaped portion 56 rotates in the circumferential direction. It fits into the fitting part 36 of the upper member 31 as possible. On the peripheral wall of the first shaft portion 57, first to fourth groove portions 57A to 57D (see FIG. 4) extending upward in the axial direction from the lower end portion 61 are formed. The outer diameter of the first shaft portion 57 is
It is the largest at the upper end portion 58 near the disk-shaped portion 56, and the portion 5
8 is the smallest at the intermediate portion 59 and the lower portion 61
In the example, both portions 58 and 59 are formed in an intermediate size.

The lower wheel 52 includes a cylindrical second shaft portion 66.
A second disk-shaped portion 67 extending radially outward from an upper end edge of the portion 66; and a peripheral wall 68 hanging down from the outer peripheral edge of the portion 67 and extending in the circumferential direction. There is a clearance 71 between the lower edge 68A of the peripheral wall 68 and the upper surface 69 of the lower member 32. The outer diameter of the second shaft portion 66 is such that the upper end portion 72 in the immediate vicinity of the second disk-shaped portion 67 is larger than the inner diameter d ₁ of the upper portion of the first circular hole 16 and the first intermediate portion below the upper end portion 72. 73
Abuts on the upper portion of the first circular hole 16 so as to be slidable in the circumferential direction. The second intermediate portion 74 below the first intermediate portion 73 is a portion facing the chamfered portion 16A of the circular hole 16, and has a smaller diameter than the first intermediate portion 73. The lower end portion 76 further below the second intermediate portion 74 has a larger diameter than the second intermediate portion 74. Such a second shaft portion 66
Is a boundary portion 77 between the upper end portion 72 and the first intermediate portion 73.
Are slidably in contact with the upper surface 69 of the lower member 32.
The first intermediate portion 73, the lower end portion 76, and these portions 73,
The second intermediate portion 74 sandwiched between the second shaft portion 76
6 is formed on the outer periphery of the circular hole 6, and the retaining ring 78 fitted in the groove comes into contact with the surface of the chamfered portion 16A of the circular hole 16, so that the lower wheel 52
6 cannot be pulled out upward. A single projection 79 extending in the axial direction is formed on the inner peripheral surface of the second shaft portion 66.

The upper wheel 51 has an intermediate portion 59 of the first shaft portion 57 fitted inside the second shaft portion 66 of the lower wheel 52. In such fitting, the third slit 57 </ b> C of the first shaft portion 57 is fitted into the projection 79 of the second shaft portion 66, and the lower end portion 61 of the first shaft portion 57 is separated from the lower end portion 76 of the second shaft portion 66. Is located below and abuts the lower end portion 76 from below, so that the upper wheel 51 and the lower wheel 52 are integrated with the housing 10 around the first and second shaft portions 57 and 66. It turns around. In addition, the upper wheel 51 is provided with the lower wheel 52 unless the first shaft portion 57 is deformed radially inward and the lower end portion 61 abuts on the lower end portion 76 of the second shaft portion 66.
Never escape from

In the wheel 50 in which the upper and lower wheels 51 and 52 are fitted as described above, the cord 8 is connected to the first shaft 57.
Of the cord 8 is partially wound around the upper end portion 58 of the first shaft portion 57, and the remaining portion of the elastic portion 8A is
4 extends out. Fixed length part 8B of code 8
Extends from the lower end portion 61 to the outside through the inside of the first shaft portion 57. Since the top of the first slit 57A is formed in an inverted V-shape (see FIG. 3), the portion of the cord 8 inserted therein is pressed from the radial direction, and
The state is fixed to the shaft portion 57.

The lower wheel 52 includes a second disc-shaped portion 67.
, The peripheral wall 68 and the lower member 32 form a storage portion 81 for the coil spring 53. The spring 53 is wound around the outer periphery of the second shaft portion 66, the inner end portion 53A (see FIG. 3) is fixed to the second shaft portion 66, and the outer end portion 53B is bent in an inverted L-shape. It is fixed to the lower member 32 via a member 82 which is provided. The inverted L-shaped member 82 extends between the inside and outside of the storage portion 81 through a clearance 71 between the peripheral wall 68 and the lower member 32, and inside the storage portion 81, a spring 53 is provided.
In addition, it is attached to the lower member 32 outside the storage portion 81. Small projections 91 rising from the upper surface 69 of the member 32 are used for positioning the inverted L-shaped member 82.

FIG. 4 shows that the upper wheel 51 is connected to the lower end portion 61.
FIG. 4 is a plan view when viewed from above. The first shaft portion 57 has first to fourth slits 57A extending in the axial direction.
To 57D are arranged at equal intervals in the circumferential direction. The cord 8 is inserted through the first slit 57A, and the third slit 57
C fits into the protrusion 79 of the second shaft portion 66. The second and fourth slits 57B and D enable the first shaft portion 57 to be elastically deformed inward in the radial direction.

In FIG. 3, the code 8 is a first shaft 57
A part of the elastic portion 8A protruding from the first slit 57A is wound around the first shaft portion 57 clockwise. On the other hand, the coil spring 53 is wound around the second shaft portion 66 in a counterclockwise direction. The elastic portion 8A of the cord and the spring 53 are
When the telescopic portion 8A is pulled out of the reel 1 for a long time, the wheel 1 rotates clockwise and the spring 53 accumulates, and a force to rotate the wheel 1 counterclockwise, in other words, the expansion and contraction of the cord 8 The force in the direction of winding the portion 8A is increased. However, the brake 17 acts on the wheel 50 so that it does not rotate counterclockwise. When the operation of the brake 17 is released and the telescopic portion 8A is wound up, the stored energy of the spring 53 gradually weakens. In the reel 1, the first and second shaft portions 57 and 66 rotate with respect to the housing 10. Therefore, in the cord 8 fixed to the first shaft portion 57, the fixed length portion 8 </ b> B is the first shaft portion. It rotates with 57. Therefore, it is necessary to remove the plug 7 on the fixed length portion 8B side from the handset 3 when pulling out or winding up the expansion and contraction portion 8A.

As shown in FIG.
The operation unit 18, the stopping unit 86, these two parts 18, 8
6 and a connecting portion 87 interposed therebetween. When the connecting portion 87 is fitted into the groove 37 of the member 32 such that the operating portion 18 is located outside the housing lower member 32, the stopping portion 86 fits between the peripheral wall portion 32A and the support wall 38, and the stopping portion 86 End portion 86A of the lower wheel 52 abuts against the outer surface of the peripheral wall 68 of the lower wheel 52, and the curved end portion 86B located on the opposite side of the end portion 86A strongly abuts against a portion 32B of the peripheral wall portion 32A. By the contact, the entire brake 17 is
The end portion 86A is urged to press against the peripheral wall 68 of the lower wheel 52. By this pressing of the end portion 86A, the wheel 50 is rotated only when the telescopic portion 8A of the cord is pulled out, and a brake is applied so as not to rotate in the direction in which the telescopic portion 8A is wound. Brake 1
When the operating portion 18 of 7 is slid in the direction of arrow A against the bias, the end portion 86A is detached from the lower wheel 52.
The wheel 50 automatically rotates by the action of the stored spring 53, winds up the telescopic portion 8 A of the cord, and stores it on the reel 1.

In the cord reel according to the present invention, each member except for the coil spring can be formed as a plastic molded product. A conventional metal material is used for the coil spring. The cord inserted into the slit of the first shaft portion may be fixed to the first shaft portion via an appropriate member that engages with the first shaft portion.

[0020]

According to the cord reel of the present invention, the cord of the portable telephone or the earphone of the radio can be automatically wound up and stored, and the cord can be easily pulled out when used. , Making the code easier to carry.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of a code reel.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view of the code reel.

FIG. 4 is a plan view of an upper member as viewed from a lower end portion side.

[Explanation of symbols]

 1 code reel 8 cord 8A end 8B end 10 housing 11 upper surface part 12 lower surface part 13 peripheral wall part 14 opening 17 brake means 18 operating part 50 wheel 53 coil spring 53A inner end 53B outer end 57 cylindrical part (first axis) Part) 57A insertion part (first slit) 67 disk-shaped part 68 peripheral wall 81 storage part 86A stopping part

Claims (1)

[Claims] 1. A cord reel for rewinding a cord of an earphone so as to be able to be pulled out, wherein the cord reel has an upper surface portion, a lower surface portion, and a peripheral wall portion interposed between the both surface portions, and the housing. A wheel that is rotatably mounted in the inside, and that winds up one end of the cord so that the cord can be pulled out, and a coil spring that can automatically turn the wheel in the winding direction of the cord. A brake means which is detachably engaged with the wheel and capable of suppressing automatic rotation of the wheel, wherein the housing is capable of winding up and pulling out one end of the cord. The cord has an opening in the peripheral wall, and the lower surface of the housing has a circular hole capable of extending an end opposite to the one end of the cord. The wheel has an axial direction extending in the up-down direction of the housing, a hollow cylindrical portion that is rotatably fitted in the circular hole in a direction around the hollow hole, and an axially intermediate portion of the cylindrical portion. A disk-shaped part that extends radially outward and bisects the housing in the vertical direction, and the disk-shaped part forms a storage part in which the coil spring fits in a lower part from the intermediate part together with the housing lower part. A portion of the cylindrical portion above the intermediate portion can wind the cord around its outer periphery, and the peripheral wall of the portion extends the cord between the inside and outside of the cylindrical portion. A cord insertion portion capable of fixing a part of the extending cord, wherein the coil spring has an inner end fixed to the cylindrical portion in the storage portion. Together with the The outer periphery of the spring is fixed to the housing in a direction opposite to the winding direction of the cord, and the outer peripheral portion of the spring is fixed to the housing. An operating portion slidable along the portion, and detachably engaged with the wheel under a spring bias inside the peripheral wall portion under the bias of the spring to automatically rotate the wheel. And a restraining portion that is opposite to the rotating direction and that can allow the cord wound around the cylindrical portion to rotate in the pull-out direction. The code reel according to claim 1, wherein the stopping portion is slidable in a direction in which the stopping portion is separated from the wheel against the bias of the spring.