JPH04107992U - ear speaker - Google Patents

Abstract

(57) [Summary] [Purpose] The ear speaker 10 of the present invention aims to reduce sound leakage when worn. [Structure] An ear speaker 10 includes an electroacoustic transducer 1 inside an outer casing 11. The ear speaker 10 is mounted by housing the outer housing 11 in a recess in the concha cavity between the tragus and antitragus of the auricle. Further, the region 13 of the sound hole 12 formed in the sound emitting surface 11a of the outer casing 11 is offset so as to substantially correspond to the external auditory canal in the worn state. A region 13 on the sound emitting surface 11a is depressed from its surroundings, and a bank portion 14 is provided outside the region 13 on the sound emitting surface 11a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an improvement of an auricle-mounted ear speaker.

0002

[Conventional technology]

BACKGROUND ART Auricular ear speakers that are comfortable to wear are becoming popular. This kind of As shown in Figure 5, the ear speaker is an electroacoustic transducer consisting of a diaphragm, a magnetic circuit, etc. an outer casing 2 provided with a transducer 1 and an external connection extending from the electroacoustic transducer 1 to the outer casing 2; It has a cord lead-out part 4 which leads out the connection cord 3 to the outside of the outer casing 2.

0003 As shown in FIG. 6, the concha located between the tragus 5a and the antitragus 5b of the auricle 5 By storing the outer casing 2 in the recess of the cavity 5c, the earpiece shown as a whole by the dashed line The peaker is attached.

0004 By the way, this type of ear speaker is prone to sound leakage, and As the nuisance caused by this problem became a social problem, it was necessary to take some measures.

[0005] Therefore, in the above configuration, the conventional ear speaker 8 shown in FIG. A region 7 of a large number of sound holes 6, 6, . . . formed on the sound emitting surface 2a is shifted to one side. This way 9, the area 7 will approximately correspond to the position of the external auditory canal 5d. Then, the sound from the electroacoustic transducer 1 is emitted only near the entrance of the ear canal 5d; Sound leakage to the outside can be further reduced. In addition, as shown in Figures 8(a) and (b), As shown in FIG. It was smooth and smooth.

[0006]

[Problem that the idea aims to solve]

However, with the ear speaker 8 mentioned above, it is still not possible to prevent sound leakage. It was not enough. The reason for this is that the sound emitting surface 2a of the outer casing 2 is smooth, as shown in FIG. When the ear speaker 8 is attached, the outside of the sound emitting surface 2a relative to the surroundings of the ear canal 5d is This is because the adhesion of the periphery 2a1 is poor, resulting in a gap, which makes it easy for sound to leak.

[0007]

[Means to solve the problem]

This invention was devised to solve the above-mentioned problems, and is based on an electroacoustic transducer element. The outer casing is placed in the recess of the concha cavity between the tragus and antitragus of the auricle. When the outer ear is stored and worn, and in such a way that it approximately corresponds to the ear canal, In the ear speaker in which the area of the sound hole formed on the sound emitting surface of the housing is shifted to one side, the above-mentioned The area on the sound emitting surface is depressed relative to its surroundings, and the area on the sound emitting surface is An ear speaker characterized by having a bank on the outside, and such an ear speaker. - In the speaker, a notch recess is formed in a predetermined part of the bank, and the left and right A convex portion for identification is placed in the notched recess so as to be lower than the bank portion. The present invention provides an ear speaker characterized in that it is provided with an ear speaker.

[0008]

【Example】

The present invention will be explained below with reference to the drawings. Figure 1 shows the ear speaker according to the present invention. A front view showing one embodiment, FIGS. 2(a) and 2(b) are sectional views taken along line a-a in FIG. 1, respectively. bb sectional view, FIG. 3 is a diagram showing how the ear speaker of this embodiment is installed, and FIG. 4 is a diagram of the installed state of the ear speaker of this embodiment. Frequency characteristics showing sound leakage measurement results for ear speakers and conventional ear speakers. FIG. 5 is a diagram showing a general example of an auricle-mounted ear speaker. In addition, the true truth The basic configuration of the example is almost the same as that in FIG. 5, so the same components are denoted by the same reference numerals. A detailed explanation will be omitted, and in this example, we will focus on the outer casing, which is a different component. Narrow down and explain.

[0009] In the ear speaker 10 shown in FIG. 1, the sound emitting surface 11a of the outer housing 11 has many Sound holes 12, 12... are formed, and areas 13 of these sound holes 12, 12... are the same as in the conventional example. It is offset to correspond to the external auditory canal 5d. Also, together with Figures 2(a) and (b), As shown in the figure, the area 13 of the sound holes 12, 12... on the sound emitting surface 11a is A bank portion 14 is formed outside the area 13 on the sound emitting surface 11a. has been done. Note that the height of the bank portion 14 is, for example, approximately 1 mm.

0010 By the way, the ear speakers 10 mentioned above are usually used in pairs (in stereo). However, at this time, the sound is transmitted to each ear speaker 10 so that each ear corresponds to the left and right ears. The regions 13 of the holes 12, 12, . . . are offset in different ways. For this reason, the left and right It is necessary to provide the ear speaker 10 with a function for identifying. Therefore, bank part 14 In the center of the wide part 14a, there is a depression to the same extent as the area 13, and a part is continuous with this. A notched recess 15 is formed, and inside this notched recess 15 there is a A convex portion 16 depicting a character (such as "L" or "R") is formed. This convex part The height of the bank 16 is lower than the height of the bank portion 14. In addition, the year shown in Figure 1 Since the speaker 10 is attached to the left ear, the convex portion 16 has the letter “L”; If this ear speaker 10 is attached to the right ear, the convex portion 16 will be called "R". It becomes a character.

[0011] FIG. 3 shows the state in which this ear speaker 10 is worn. As illustrated, the outer casing 11 Because the bank portion 14 formed on the sound emitting surface 11a of Accordingly, the ear speaker 10 is attached in close contact with the external auditory canal 5d.

0012 Here, the ear speaker 10 of this embodiment and the ear speaker 8 of the conventional example are used respectively. FIG. 4 shows the frequency characteristic results obtained by measuring these sound leakages. In addition, measurement conditions are the same, and each ear speaker 10, 8 is attached to a human ear and a predetermined input is performed. and pick up the leaked sound using a small microphone placed 4 cm away from ear speakers 10 and 8. The sound pressure level was measured respectively.

[0013] From FIG. 4, it can be seen that the measurement results using the ear speaker 10 of the example are generally better than that of the conventional example. It can be seen that the sound pressure level is lower than the measurement result using the ear speaker 8. and In particular, at frequencies between 3000Hz and 10000Hz that are easily audible to outsiders, the actual output is about 7dB. The sound pressure level of the sound leakage according to the embodiment is lower than that of the conventional example. This is it This proves that the ear speaker 10 of this example has even less sound leakage. It will be revealed.

[0014] In addition, characters are drawn inside the cutout recess 15 formed in the bank 14 to identify left and right. Since the convex portion 16 is formed, it is easy to distinguish between left and right when wearing the ear speaker 10. Of course, this protrusion 16 can be easily formed when molding the outer casing 11. Moreover, since it is lower than the bank part 14, when the ear speaker 10 is attached, The convex portion 16 does not press around the external auditory canal 5d and cause discomfort.

[0015] Note that, as shown by the broken line in FIG. , the ear speaker 10 can be easily worn, and the wearing can be stabilized.

[0016]

[Effect of the idea]

From the above explanation, the ear speaker of the present invention has the following effects.

[0017] In the ear speaker according to claim 1, the bank portion provided on the sound emitting surface cuts around the external auditory canal. This increases the adhesion when worn and further reduces sound leakage. This has the effect of reducing the amount of

[0018] Further, in the ear speaker according to claim 2, the convex portion allows the left and right to be identified when worn. Of course, this protrusion can be easily formed when molding the outer casing. Moreover, since it is lower than the bank, the convex part will not come out when the ear speakers are attached. It has the effect of not putting pressure on the area around the ear canal and causing discomfort.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of an ear speaker according to the present invention.

2A and 2B are a sectional view taken along the line aa and a sectional view taken along the line bb, respectively, in FIG. 1;

FIG. 3 is a diagram showing the state in which the ear speaker of this embodiment is installed.

FIG. 4 is a frequency characteristic diagram showing the sound leakage measurement results of the ear speaker of this embodiment and the conventional ear speaker.

FIG. 5 is a diagram showing a general example of an auricle-mounted ear speaker.

FIG. 6 is a diagram showing how the auricle-mounted ear speaker is worn.

FIG. 7 is a front view showing a conventional ear speaker.

8A and 8B are a cross-sectional view taken along line aa and cross-sectional view taken along line bb in FIG. 7, respectively.

FIG. 9 is a diagram illustrating a state in which a conventional ear speaker is worn.

FIG. 10 is a diagram illustrating problems with conventional ear speakers.

[Explanation of symbols]

1 Electroacoustic conversion element 11 Outer casing 11a Sound emitting surface 5 Auricle 5a Tragus 5b Anti-bead 5c Concha cavity 5d external auditory canal 10 ear speaker 12 sound hole 13 areas 14 Bank part 15 Notch recess 16 Convex part

Claims (2)

[Scope of utility model registration request] 1. An electroacoustic transducer is provided in an outer casing, and the outer casing is housed and installed in a recess in a concha cavity between a tragus and an antitragus of an auricle, and the outer casing is installed. In the ear speaker, the region of the sound hole formed in the sound emitting surface of the outer casing is biased so as to substantially correspond to the external auditory canal, and the region of the sound emitting surface is recessed relative to its surroundings, An ear speaker characterized in that a bank portion is provided outside the area on the sound surface. 2. The ear speaker according to claim 1, comprising:
An ear speaker characterized in that a cutout recess is formed in a predetermined part of the bank, and a protrusion for distinguishing left and right is provided in the cutout recess so as to be lower than the bank.