JPH0677392U - earphone - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an earphone that is easily worn and surely fits into the ear canal. [Structure] The expandable / contractible portion 5 is provided in the ear hole insertion portion 1b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an earphone having a structure that fits in an ear hole.

[0002]

[Prior art]

 It is important to fit the earphone to the ear canal to prevent sound leakage, noise intrusion, and dropout. Therefore, it has been conventionally known to fit a medical rubber pad to the outer periphery of the ear hole insertion portion (sound guide portion) of the earphone.

[0003]

[Problems to be solved by the device]

 However, the above conventional example has the following problems. Increasing the outer diameter of the rubber pad to fit in the ear canal makes it difficult to fit in the ear. On the other hand, if the outer diameter of the rubber pad is made smaller, the function of preventing sound leakage, noise intrusion, and dropout deteriorates. An object of the present invention is to provide an earphone that is easy to wear and that surely fits in the ear canal.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, in this invention, the expandable / contractible portion is provided in the ear hole insertion portion.

【Example】

 An embodiment of this invention will be described below.

FIG. 1 and FIG. 2 show one embodiment. 1 is a longitudinal sectional view, and FIG. 2 is a side view.

A main body 1 made of resin or the like transmits a sound by being inserted into an ear hole and a conversion portion 1a having a coil 3 and a diaphragm 4 for converting an electric signal transmitted through a cord 2 into a sound. Sound guide part (ear hole insertion part) 1b. A pad 5 is fitted on the outer circumference of the sound guide portion 1b as an expandable / contractible portion made of an air bag. The pad 5 is made of a flexible material such as rubber. A part of the pad 5 extends to the end surface of the conversion portion 1a. 6 is a band for fixing the pad 5 to the main body 1. A pump chamber 7 for sending air to the pad 5 is provided on the end surface of the conversion unit 1a. The pump chamber 7 is made of a film material that can be deformed and restored. 8 is an air hole. The pump chamber 7 is adapted to push air with a finger to feed air. A backflow prevention valve 9 is provided between the pump chamber 7 and the pad 5 to prevent backflow of air from the pad 5 to the pump chamber 7.

This embodiment operates as follows.

The pad 5 is reduced (represented by a chain line in FIG. 1) and the sound guide portion 1b is inserted into the ear canal. Next, while grasping the conversion portion 1a by hand, as shown in FIG. 1, the pump chamber 7 is pushed with a finger as shown in FIG. 1 to inject air into the pad 5 to expand (expand) the pad 5 (solid line state in FIG. 1). . When the pad 5 fits well in the ear canal, stop pushing the pump chamber 7. After use, push back the check valve 9 with your finger to remove air from the pad 5 and return it to the state of broken line in FIG.

Since the pad 5 is enlarged to fit the ear canal, the earphone 1 can be easily and easily attached without fail, and the ear canal can be surely fitted. It is especially suitable for hearing aids. Further, even the earphones 1 of the same size can be comfortably fitted to ear holes of different sizes depending on the person. In addition, each person can be adjusted to the best fit condition.

The present invention is not limited to the above embodiment.

For example, as shown in FIG. 3, a expansion / contraction material 12 made of a shape memory alloy is built in a pad 11 made of rubber or the like. The expansion member 12 is expanded and deformed at, for example, 35 degrees and returned to its original shape at 25 degrees. The expansion / contraction material 12 naturally expands due to body temperature when worn, and the pad 11 fits into the ear canal. Further, as shown in FIG. 4, the main body may be made of shape memory resin, and the expansion / contraction part 21 may be provided integrally with the sound guide part. According to the examples of FIGS. 3 and 4, there is an advantage that the body naturally deforms due to the body temperature during fitting and fits into the ear canal. Further, particularly in the example of FIG. 4, there is an advantage that the structure can be greatly simplified.

[0012]

[Effect of device]

 According to this invention, since the earpiece insertion portion is provided with the expandable / contractible portion so that the earpiece fits in the earhole, the earphone can be easily and effortlessly mounted, and the earpiece can be fitted accurately.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partial vertical sectional view showing another embodiment.

FIG. 4 is a partial vertical sectional view showing still another embodiment.

[Explanation of symbols]

 1 main body 1b sound guide part (ear hole insertion part) 5 pad 7 pump chamber 11 pad 12 expansion / contraction material 21 expansion / contraction part

Claims (2)

[Scope of utility model registration request] 1. An earphone having an expandable / retractable portion provided at an ear hole insertion portion. 2. The earphone according to claim 1, wherein a pad made of an air bag is provided on the outer periphery of the ear hole insertion portion, and a pump portion for injecting air into the pad and inflating the pad is provided.