TW201637460A - Earphone - Google Patents

Abstract

An earphone including a housing, a first speaker unit and a second speaker unit is provided. The housing has a rear chamber, a front chamber and a main audio-output opening that are sequentially communicated with each other. The first speaker unit is disposed in the rear chamber. The second speaker unit is disposed in the front chamber. Only portion of the side wall of the second speaker unit is contacted with the wall of the front chamber, and a channel is kept between the side wall of the second speaker unit and the wall of the front chamber. The area of the main audio-output opening is bigger than the minimum area of the cross-section of the channel.

Description

headset

The present invention relates to an earphone, and more particularly to an earphone having a dual speaker unit.

With the continuous advancement of technology, electronic products are all moving toward the trend of light and miniaturization. People can use mini-electronic products such as MP3 players, smart phones, tablets or notebook computers to enjoy various audio and video entertainment anytime, anywhere. . Regardless of the above-mentioned electronic products, in order to allow users to listen to the sound information provided by electronic products without disturbing others, the earphone has become an essential accessory for electronic products. In addition, the earphones also provide a better sound transmission for the listener, so that the listener can clearly hear and understand the sound content, unlike the transmission of sound in the air can cause unclear conditions, and especially during the user's movement, for example It will not be affected in sports, driving, intense activities or noisy environments.

At present, the earphones using the dual-speaker unit provide better sound quality by expanding the overall frequency response range of the earphone, and have become one of the considerations for various manufacturers to develop headphones. However, how to make the two speaker units work for maximum effect rather than interfere with each other is a subject worth studying.

The invention provides an earphone, which can enhance the sound quality performance of the earphone of the dual speaker unit.

The earphone of the present invention comprises a casing, a first horn unit and a second horn unit. The housing has a rear chamber, a front chamber and a main sound outlet that are sequentially connected. The first horn unit is disposed in the rear chamber. The second horn unit is disposed in the front chamber. The side wall of the second horn unit is only partially in contact with the chamber wall of the front chamber and retains a passage between the side wall of the second horn unit and the chamber wall of the front chamber. The area of the main sound outlet is larger than the minimum cross-sectional area of the channel.

In an embodiment of the invention, the chamber wall of the front chamber has a plurality of support ribs that contact the side walls of the second horn unit.

In an embodiment of the invention, the first horn unit is spaced from the second horn unit.

In an embodiment of the invention, the earphone further includes an ear pad assembled to the housing.

In an embodiment of the invention, the output audio of the first speaker unit is lower than the output audio of the second speaker unit.

In an embodiment of the invention, the outer diameter of the portion of the housing in which the second horn is disposed is less than or equal to 8 millimeters.

In an embodiment of the invention, the area of the main sound outlet is smaller than the cross-sectional area of the front chamber where the second speaker unit is disposed.

Based on the above, in the earphone of the present invention, the area of the main sound outlet is larger than the front The minimum cross-sectional area of the channel next to the speaker unit. Thereby, the possibility that the sound provided by the rear horn unit is attenuated before leaving the main sound outlet can be reduced, thus making the earphone of the present invention provide better sound quality.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧ headphones

110‧‧‧shell

120‧‧‧First speaker unit

130‧‧‧Second speaker unit

140‧‧‧ ear pads

C12‧‧‧ rear chamber

C14‧‧‧ front chamber

C14A‧‧‧Support ribs

C14A1‧‧‧ Bevel

C16‧‧‧ main sound outlet

C18‧‧‧ channel

L12, L14‧‧‧ curve

A12, A14‧‧‧ central axis

1 is a cross-sectional view of an earphone in accordance with an embodiment of the present invention.

2 is a cross-sectional view of the earphone of FIG. 1 with the second horn removed.

Figure 3 is a cross-sectional view of the earphone of Figure 1 taken along line A-A.

Figure 4 is a cross-sectional view of the earphone of Figure 1 taken along line B-B.

Figure 5 shows the effect of the area of the main sound outlet on the frequency response of the headphones.

Figure 6 is a perspective view of the earphone of Figure 1 after the ear pad is attached.

1 is a cross-sectional view of an earphone in accordance with an embodiment of the present invention. Referring to FIG. 1 , the earphone 100 of the embodiment includes a casing 110 , a first horn unit 120 , and a second horn unit 130 . The housing 110 has a rear chamber C12, a front chamber C14 and a main sound outlet C16 which are sequentially connected. In other words, fluid can flow between the back chamber C12 and the front chamber C14, and fluid can also flow between the front chamber C14 and the main sound outlet C16. The first horn unit 120 is disposed in the rear chamber C12. Second speaker unit 130 Placed in the front chamber C14. The side wall of the second horn unit 130 is only partially in contact with the chamber wall of the front chamber C14, and a passage C18 is left between the side wall of the second horn unit 130 and the chamber wall of the front chamber C14. The sound provided by the first horn unit 120 can pass from the passage C18 beside the second horn unit 130 and out of the main vent C16 to the outside of the housing 110 after entering the front chamber C14. The sound provided by the second horn unit 130 can be transmitted from the main sound outlet C16 to the outside of the housing 110. Therefore, the sound provided by the earphone 100 of the present embodiment may be the sum of the sounds provided by the first horn unit 120 and the second horn unit 130.

Referring to FIG. 1 and FIG. 2 simultaneously, in order to achieve the purpose of retaining the channel C18 between the sidewall of the second horn unit 130 and the cavity wall of the front chamber C14, the cavity wall of the front chamber C14 of the present embodiment has many Support ribs C14A. The support rib C14A contacts the side wall of the second horn unit 130, and thereby the second horn unit 130 is fixed in the front chamber C14. At the same time, the passage C18 is retained between the support ribs C14A. The relative position between the support rib C14A, the passage C18 and the second horn unit 130 can be more clearly seen from FIG. In this embodiment, the purpose of retaining the passage C18 is achieved by providing the support rib C14A. However, the purpose of retaining the passage C18 can be achieved in many ways, and the present invention is not limited to the manner in which the support rib C14A can be disposed. Further, the support rib C14A of the present embodiment is disposed in parallel to the central axis A14 of the second horn unit 130, and a total of four support ribs C14A are disposed at equal intervals, but the present invention is not limited thereto. Furthermore, in order to facilitate assembly, a side of the support rib C14A adjacent to the rear chamber C12 may be provided with a slope C14A1 for guiding positioning when the second horn unit 130 is inserted into the front chamber C14 from the rear chamber C12. .

Next, referring to FIG. 3 and FIG. 4 simultaneously, the housing 110 has a main sound outlet C16 in front of the front chamber C14. It should be noted that the main sound outlet C16 of the present embodiment is not at the foremost end of the casing 110 but at a position slightly inside, but the present invention is not limited thereto. The position of the main sound outlet C16 is, for example, the narrowest portion of the space defined by the housing 110 in front of the second horn unit 130. In addition, the cross-sectional area of the channel C18 can be designed to have a change or a fixed pattern, and the cross-sectional area of the channel C18 of the present embodiment is an example of maintaining a fixed value. In this embodiment, the area of the main sound outlet C16 is designed to be larger than the minimum cross-sectional area of the passage C18. With such a design, it is ensured that the sound supplied from the first horn unit 120 is not subjected to the transmission path from the passage C18 and is restricted by the main sound outlet C16, resulting in deterioration of sound quality.

Figure 5 shows the effect of the area of the main sound outlet on the frequency response of the headphones. The curve L12 in Fig. 5 is a frequency response curve obtained when the area of the main sound outlet C16 is 1.76 cm square and the minimum cross-sectional area of the channel C18 is 6.19 cm square, and the curve 14 is the area at the main sound outlet C16. The frequency response curve obtained at 10.17 cm square and the minimum cross-sectional area of channel C18 is 6.19 cm square. As can be seen from FIG. 5, the frequency response curve represented by the curve L12 is significantly inferior to the frequency response curve represented by the curve 14 in the partial frequency interval. Therefore, it can be proved that when the area of the main sound outlet C16 is designed to be larger than the minimum cross-sectional area of the channel C18, the overall frequency response curve of the earphone is ideal.

Referring to FIG. 1 again, in this embodiment, the first horn unit 120 and the second horn unit 130 are kept at a distance, that is, the two are not in direct contact. In this way, the sound emitting surface of the first horn unit 120 can be prevented from being obscured by the second horn unit 130, which helps to improve The sound quality of the earphone 100. In addition, in the present embodiment, the central axis A12 of the first horn unit 120 and the central axis A14 of the second horn unit 130 are exemplified by an angle with each other, but in other embodiments, the two may be parallel to each other. When the size of the second horn unit 130 is small, the portion of the housing 110 of the embodiment for accommodating the second horn unit 130 can be placed in the ear canal of the user. For example, the outer diameter of the portion of the housing 110 configured with the second horn unit 130 is less than or equal to 8 mm. In this way, the second horn unit 130 can be brought closer to the tympanic membrane of the user, and a lower hearing power can be produced as long as the power is lower. In addition, in this embodiment, the output audio of the first speaker unit 120 is lower than the output audio of the second speaker unit 130, but the present invention is not limited thereto. The combination of the two horns complements the defect that the single horn monomer does not easily achieve the desired frequency response curve.

Referring to FIG. 1, in order to allow the sound provided by the first speaker unit 120 and the second speaker unit 130 to be properly mixed and then leave the main sound outlet C16, the area of the main sound outlet C16 can be designed to be smaller than the front cavity. The chamber C14 is configured with a cross-sectional area at the second horn unit 130. The area of the main sound outlet C16 can be referred to the cross-sectional view of Fig. 4 as seen from the line B-B of Fig. 1. The cross-sectional area of the front chamber C14 disposed with the second horn unit 130 can be referred to the cross-sectional view of FIG. 3 as seen from the AA line of FIG. 1, corresponding to the cross-sectional area of the channel C18 of FIG. 3 and the second horn unit 130. The sum of the cross-sectional areas. The cross-sectional area of the second horn unit 130 is a cross-sectional area obtained perpendicular to the central axis A14.

The housing 110 of the present embodiment has a stopper in front of the front chamber C14, and the size of the front chamber C14 is smaller than the size of the first horn unit 120. The housing 110 also has a stop at the rear chamber C12 near the front chamber C14. In assembling the earphone of the embodiment At 100 o'clock, the second horn unit 130 can be first placed into the front chamber C14 from the rear end of the housing 110 via the rear chamber C12, then the first horn unit 120 is placed in the rear chamber C12, and finally the housing The rear end of the 110 is closed and the assembly process is completed. In general, the earphone 100 of the present embodiment is easy to assemble, and the positioning of the first speaker unit 120 and the second speaker unit 130 is not required to be performed manually, and it is easy to ensure that the relative positions of the components are the same as the ideal design. In order to get the best sound quality. In addition, as shown in FIG. 6, the earphone 100 may further include an ear pad 140 assembled to the end of the housing 110 having the main sound outlet C16 for providing a comfortable tactile feel of the ear canal in contact with the ear pad 140.

In summary, the earphone of the present invention employs a dual-speaker unit to compensate for the insufficient frequency response. Moreover, by designing the area of the main sound outlet to be larger than the minimum cross-sectional area of the channel to prevent the sound from interfering with each other in the casing, the overall frequency response of the earphone can be further improved to a better state, thereby providing a more ideal sensory feeling for the user. enjoy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ headphones

110‧‧‧shell

120‧‧‧First speaker unit

130‧‧‧Second speaker unit

C12‧‧‧ rear chamber

C14‧‧‧ front chamber

C14A‧‧‧Support ribs

C14A1‧‧‧ Bevel

C16‧‧‧ main sound outlet

A12, A14‧‧‧ central axis

Claims (7)

An earphone comprising: a casing having a rear chamber sequentially connected, a front chamber and a main sound outlet; a first horn unit disposed in the rear chamber; and a second horn a body disposed in the front chamber, wherein a sidewall of the second horn unit is only partially in contact with a cavity wall of the front chamber, and between a sidewall of the second horn unit and a cavity wall of the front chamber One channel is reserved, and the area of the main sound outlet is larger than the minimum cross-sectional area of the channel. The earphone of claim 1, wherein the cavity wall of the front chamber has a plurality of support ribs that contact the side walls of the second horn unit. The earphone of claim 1, wherein the first speaker unit is kept at a distance from the second speaker unit. The earphone of claim 1, further comprising an ear pad assembled to the housing. The earphone of claim 1, wherein the output audio of the first speaker unit is lower than the output audio of the second speaker unit. The earphone of claim 1, wherein the housing is provided with a portion of the second horn unit having an outer diameter of 8 mm or less. The earphone of claim 1, wherein the area of the main sound outlet is smaller than the cross-sectional area of the front chamber where the second speaker unit is disposed.