JPH0898290A - Inner ear type headphone - Google Patents

Abstract

PURPOSE: To provide an inner ear type headphone adaptable to everybody's earhole by providing a knob on the outer periphery of a tubular member inserted into the earhole and deforming a ring shape ear pad elastically by pivoting the knob. CONSTITUTION: A projecting part 11c is provided at the terminal part of a protrusive tubular member 11a inserted into the earhole in a housing 11, and it is fixed by adhering on the side face 15a of the ear pad 15. The knob 16 is provided between a stopping side part 11d at the other terminal of the member 11a and the ear pad 15. The ear pad 15 is deformed elastically by pivoting the knob 16, and the size of the ear pad can freely be adjusted. In this way, it is possible to make this headphone fit every type of earhole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner ear type headphone suitable for application to audio equipment such as radios, tape recorders, MDs (minidiscs) and headphone stereos.

[0002]

2. Description of the Related Art When listening to an audio device such as a radio alone without leaking the sound to the outside, an inner ear type headphone is usually used.

FIG. 10 is a diagram schematically illustrating a conventional inner ear type headphone. As shown in FIG. 10, a conventional inner ear type headphone includes a housing 1 in which a speaker unit (not shown) is housed, a closing member 2,
Cord 3, housing 1 connected to speaker unit
The ear pad 5 is made of, for example, rubber or urethane foam ear pads 5 for covering the ear canal side end surface 1a. The outer diameter L1 of the inner ear type headphones is about 16 mm to 18 m.
The type of m is common, and the change in the outer diameter at the time of wearing was only a very slight change in the ear pad 5.

[0004]

By the way, the size of the ear canal is different between children and adults, so that the size varies from person to person, and the outer diameter L1 of the ear pad 5 as shown in FIG. It is impossible to adapt to one's ear canal with one-design inner ear type headphones. Therefore, when a person with a large ear canal uses inner ear type headphones with a small outer diameter, sound leakage increases, leading to deterioration in sound quality. Also,
In the opposite case, it may be difficult to enter the ear canal and even painful in the ear canal.

Therefore, the present invention has been made in consideration of the above problems.
It is an object of the present invention to provide an inner ear type headphone that can be adapted to any ear canal of any person.

[0006]

In order to solve the above problems, in an inner ear type head according to claim 1 of the present invention, a main body having a tubular portion that can be inserted into an ear canal, and an outer periphery of the tubular portion are arranged. A ring-shaped pad that can be elastically deformed,
A ring-shaped knob that can be rotated, and the outer diameter of the ring-shaped pad is changed by rotating the ring-shaped knob.

According to a second aspect of the present invention, the outer diameter of the ring-shaped pad is expanded by the rotation of the ring-shaped knob moving toward the ear canal side, and the ring-shaped knob is rotated away from the ear canal side. It is characterized in that the outer diameter of the pad is reduced.

According to a third aspect of the present invention, the ring-shaped pad in the first aspect is made of rubber.

[0009]

According to the present invention, as shown in FIGS. 1 to 4, the housing 11 which is the main body is provided with the projecting tube member 11a which is inserted into the ear canal, and the knob 16 provided on the outer periphery of the projecting tube member 11a is rotated to remove the protruding tube member 11a. An ear pad 15 whose diameter changes is provided.

Therefore, the size of the ear pad 15 of the inner ear type headphone can be freely adjusted by rotating the knob 16, and the ear pad 15 can be sufficiently fitted to the ear of any person.

[0011]

Embodiments of the inner ear type headphones of the present invention will be described below in detail with reference to the drawings.

1 to 5 are views for explaining a first embodiment of the present invention. Particularly, FIGS. 1 and 2 are a perspective view and a cross-sectional view of a main part of the ear pad with its outer diameter reduced. Yes,
3 and 4 are a perspective view and a cross-sectional view of an essential part of the ear pad having an enlarged outer diameter, and FIG. 5 is a view showing the ear pad used in the first embodiment.

As shown in FIGS. 1 and 2, the inner ear type headphone of the first embodiment is provided with a projecting tube member 11a which projects in a tubular shape toward the ear canal and has the outer peripheral surface of the tube threaded (screw 11b). A ring-shaped ear pad 15 is arranged on the housing 11 as a main body and a tubular protruding member 11a on the peripheral surface of the ear canal side, and a ring-shaped knob 16 disposed adjacent to the ear pad 15 is screwed to the protruding member 11a. It is movably arranged. Reference numerals 2 and 3 are the same closing members and cords as in the conventional case.

A projecting portion 11c projecting in the outer peripheral direction is provided in a ring shape at the end portion of the protruding tube member 11a inserted into the ear canal, and the side surface 1 of the ear pad 15 on the ear canal side.
It is fixedly bonded to 5a. At the other end of the projecting pipe member 11a, a stop side portion 11d that projects in the outer peripheral direction is provided in the same manner. The stop side portion 11d stops the movement of the knob 16 that changes the outer diameter L11 (FIG. 5) of the ear pad 15.

In FIGS. 1 and 2, the knob 16 has a stop side portion 11d.
At this time, the outer diameter of the ear pad 15 is in the most reduced state, which is about 16 mm in this example, which fits a person with a small ear canal. The length L5 of the protruding tube member 11a is, for example, about 5 mm.

As shown particularly in FIG. 5, the ear pad 15 has a floating ring shape having a flat inner peripheral portion 15a and is made of sponge rubber. The outer diameter L11 of the ear pad 15 is gradually expanded by the compressive force from the side. In this example, this compressive force is applied by movement (screw engagement) of the ring-shaped knob 16 in the P direction (FIG. 2).

3 and 4, the knob 16 in the P direction is shown.
The outer diameter L11 of the ear pad 15 is shown to be the most expanded by the movement of, and is about 18 mm in this example. In this way, the outer diameter of the ear pad is controlled by turning (moving) the knob so that it can fit all people.

Inner diameter L10 of the ring-shaped ear pad 15
Is slightly smaller than the outer diameter of the protruding tube member 11a, and when the ear pad 15 is attached to the outer periphery of the protruding tube member 11a, the ear pad 15 is in a state of being urged toward the surface of the protruding tube member 11a. As in this example, the stop side portion 11
Even if the speaker unit 7 is slightly larger in the housing 11 provided with d, the speaker unit 7 can be arranged.

FIG. 6 shows a floating ring-shaped ear pad 25 used in the second embodiment. FIG. 7 shows the ear pad 25 used together with the housing 11 and the knob 16 shown in the first embodiment. It is a principal part sectional view which shows the 2nd Example comprised in FIG.

In particular, FIG. 7A shows a state where the knob 16 whose outer diameter of the ear pad 25 is most reduced is stopped by the stop side portion 11d, and FIG. 7B shows the state shown in FIG. 7A. Rotate the knob 16 and move it in the P direction to move the ear pad 25.
Shows the state in which the outer diameter of is expanded most.

In the second embodiment as well as the first embodiment described above, the outer diameter of the ear pad 25 can be appropriately changed by controlling the rotation of the knob 16.

FIG. 8 shows a third embodiment of the present invention. In the third embodiment, a ring-shaped rubber ear pad 35 having a horseshoe-shaped cross section is used, and one side surface of the housing 21 protrudes. It is fixedly adhered to the projection 21c of the pipe member 21a, and the other side surface is expanded and contracted by the movement of the ring-shaped knob 16 by the rotation as in the above-described embodiment, and its outer diameter is changed in size. In this example, the housing 21 does not have the above-described stop side portion and has a compact shape.

FIG. 9 shows a fourth embodiment of the present invention. In the fourth embodiment, a ring-shaped ear pad 45 having a horseshoe-shaped cross section similar to that used in the above-mentioned third embodiment is formed. The two knobs 26a and 26b are fixedly adhered to each other and arranged on the outer peripheral surface of the protruding pipe member 31a of the housing 31. The size of the outer shape of the ear pad 45 in this example is controlled by rotating the ear pad 45 itself including the knobs 26a and 26b. In this case, the knob 26a on the ear hole side is engaged with the end portion 31c of the housing 31, but only rotates the screw portion in place. On the other hand, the knob 26b is screwed with the threaded portion 31b of the housing 31, and can be rotated by the rotation of the ear pad 45 and moved in the P direction or the opposite direction to control the outer diameter of the ear pad.

As the material of the ear pad used in the present invention, various materials other than the above-mentioned rubber can be used as long as they are elastically deformable materials.

[0025]

As described above, according to the present invention, in the inner ear type headphone, the size of the outer diameter of the ring-shaped ear pad inserted into the ear canal can be freely adjusted.

Therefore, it is possible to fit the ear pads sufficiently according to the size of the ear canal.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of an inner ear type headphone according to the present invention (a state where a pad outer diameter is small).

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a perspective view of a first embodiment of the inner ear type headphone according to the present invention (a state in which the pad outer diameter is large).

4 is a cross-sectional view of FIG.

FIG. 5 is an ear pad used in the first embodiment of the present invention.

FIG. 6 is an ear pad used in the second embodiment of the present invention.

FIG. 7 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

FIG. 8 is a cross-sectional view of an essential part for explaining a third embodiment of the present invention.

FIG. 9 is a cross-sectional view of a main part for explaining a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram showing a conventional inner ear type headphone.

[Explanation of symbols]

 1, 11, 21, 31 Housing 2 Closing member 3 Cord 5, 15, 25, 35, 45 Ear pad 7 Speaker unit 11a, 21a, 31a Projecting tube member 16, 26a, 26b Knob

Claims (3)

[Claims] 1. A ring-shaped knob comprising: a main body having a tubular portion that can be inserted into an ear canal; an elastically deformable ring-shaped pad disposed on the outer periphery of the tubular portion; and a rotatable ring-shaped knob. The inner ear type headphone, wherein the outer diameter of the ring-shaped pad is changed by rotating the. 2. The outer diameter of the ring-shaped pad is enlarged by the rotation of the ring-shaped knob moving toward the ear canal side, and the outer diameter of the ring-shaped pad is reduced by the rotation away from the ear canal side. The earbud headphones according to claim 1. 3. The inner ear type headphone according to claim 1, wherein the ring-shaped pad is made of rubber.