TWI702852B - Earphone for stabilizing sound pressure and regulating acoustic leakage - Google Patents

Abstract

An earphone includes an earphone body having a front end, a rear end and an air flow channel extending from the front end to the rear end; a retaining space; a loudspeaker, disposed within the retaining space, having a vibration membrane; and a silencing unit, disposed inside the air flow channel, having an input section and an output section. Between the input section and the output section, a plurality of sound-silencing chambers is disposed and inner walls of each of the sound-silencing chambers form a cone-shaped cavity with it larger opening and end with shrink closer to the output section. The sound-silencing chambers can prevent sound leakage and attenuate sound waves to improve the sound quality of the base tones.

Description

Headphones control decompression and sound leakage structure

The present invention relates to an earphone structure that can improve the sound quality of bass and reduce the leakage of sound waves.

At present, the common headphone structure, such as the new patent case No. M529998 of "Moving Coil Piezoelectric Dual Audio Speaker Earphone" announced on October 1, 105 of the Republic of China, discloses: a housing and a composite speaker Unit; the inner hollow of the housing forms an inner cavity; the composite speaker unit is arranged in the inner cavity of the housing and includes: a basin body, a moving coil type sounder, a piezoelectric type sounder and a circuit unit; The pelvic body is a container with a bottom and a pelvic cavity is formed in it. The pelvic body has an opening. The piezoelectric sound device is arranged in the opening of the pelvic body. The moving coil sound device is arranged in the pelvic cavity and is located between the piezoelectric Between the pelvic sounder and the bottom of the pelvic cavity, the circuit unit is arranged outside the bottom of the pelvic body to electrically connect the moving coil sounder, the piezoelectric sounder, and the external sound source circuit; the moving coil sounder The structure of the pelvic body and the piezoelectric sounder arranged together can improve the assembly yield and reduce the occupied space in the inner cavity, and has the functions of expanding the bandwidth, improving the resolution and high frequency.

However, the earphone of the previous patent has the following deficiencies in use:

1. When the earphone is worn on the ear, the earphone will form a closed state of the ear canal, so the sound waves generated by the vibrating membrane will be transmitted back and forth in the ear canal between the earphone and the eardrum, causing the sound wave to produce abnormal pressure on the eardrum, causing the user Discomfort.

2. The sound waves transmitted back and forth in the ear canal will have a reverse depressive force on the diaphragm, which will affect the subsequent sound waves emitted by the diaphragm, resulting in distortion of the sound quality, especially the effect on the middle and high pitches.

Therefore, there is a patent case of Invention No. I628961 "Providing ear canal decompression and improving natural sound quality and its production method" announced by the Republic of China on July 1, 107, which discloses: the earphone includes: a earphone body, set An air flow channel penetrates the earphone body, the earphone body has an accommodating space, and a vibrating membrane is arranged in the accommodating space; a speaker is arranged in the accommodating space and corresponds to the vibrating membrane. When the user wears the earphone body on the ear, the air channel connects the ear canal of the ear to the outside world. When the sound wave generated by the vibrating membrane is reflected from the eardrum, it will not be transmitted back and forth in the ear canal, but will The air flow channel is transmitted to the outside, which can reduce the abnormal pressure of the sound wave on the eardrum, and can also prevent the sound wave from causing the reverse depressing force of the diaphragm due to the reflection, which causes the sound quality to be distorted.

Although the previous patent application uses the air flow channel to penetrate the front end, the center position and the back end of the earphone body directly and unimpededly, the sound waves generated by the vibrating membrane will not be transmitted back and forth in the ear canal after being reflected by the eardrum. The air flow channel is directly transmitted to the outside world to reduce the abnormal pressure on the eardrum caused by sound waves passing back and forth. Only with this structure, because the sound waves are directly transmitted to the outside world through the air flow channel, part of the sound waves will also leak out and be heard by people around the earphones. At the same time, the bass sound quality will also be affected.

In view of this, the current headphone structure has the above phenomenon. The present invention provides a structure for controlling pressure reduction and sound leakage of an earphone, which is provided with an earphone body with a front end, a rear end and an air flow passage. The air flow passage penetrates the front end and the rear end, and the earphone body Provide an accommodation space; A loudspeaker is arranged in the accommodating space, the loudspeaker is correspondingly provided with a vibrating membrane; a muffler unit is arranged in the air flow channel, the muffler unit is provided with an input end and an output end, the input end is connected to the air The flow channels are connected, and at least one silencing cavity is arranged inside the silencing unit.

The inner cavity of the muffler cavity is a conical shape which is set from the input end to the output end and is divergent and then retracts.

The inside of the muffler unit is provided with a plurality of connected muffler cavities between the input end and the output end.

The muffler unit is arranged in the air flow channel near the rear end.

The aforementioned input end is located inside the air flow channel, and the output end is located outside the air flow channel.

The accommodating space is arranged inside the earphone body at a position close to the periphery of the air flow channel.

The loudspeaker is connected to a signal line, and the signal line runs through the earphone body.

The above technical features have the following advantages:

1. The silencing cavities are arranged from the input end to the output end to form a tapered straight path, which can reduce the transmission speed of a part of the sound wave and cause the sound wave to lag, and no part of the sound wave will leak out To the outside world and be heard by people around the earphones, the effect of suppressing and reducing the sound wave leakage can be achieved.

2. The sound wave passes through each silencing cavity of the silencing unit in sequence, and then is transmitted to the outside through the output terminal, so that the sound wave can be effectively attenuated to enhance the bass sound quality without causing sound quality distortion, so it can Achieve boost bass to avoid excessive reduction.

3. When the user wears the earphone body on the ear, the air passage allows the ear canal of the ear to communicate with the outside world. When the sound wave generated by the vibrating membrane is reflected from the eardrum, it will not be transmitted back and forth in the ear canal. And it will be transmitted from the air flow path to the outside, which can reduce the abnormal pressure of the sound wave on the eardrum due to the back and forth transmission, and it is more comfortable to use.

(1): Headphone body

(11): Front end

(12): Backend

(13): Air flow path

(14): Housing space

(2): Speaker

(21): Vibrating film

(22): Signal line

(3): Muffler unit

(31): Input

(32): Output

(33): Silence Chamber

(34): Conical

(A): Ear

(A1): Ear canal

(A2): Eardrum

[The first figure] is a perspective view of an embodiment of the invention.

[The second figure] is a combined cross-sectional view of an embodiment of the present invention.

[The third figure] is an enlarged schematic diagram of part III of the second figure of the embodiment of the present invention.

[Fourth Figure] is a schematic diagram of the application of the embodiment of the present invention in the ear.

[Fifth Figure] is a schematic diagram of sound attenuation according to an embodiment of the present invention.

[Figure 6] is an enlarged schematic diagram of part VI of Figure 5 of the embodiment of the present invention.

Please refer to the first and second figures, the embodiment of the present invention includes: an earphone body (1), a speaker (2) and a silencer unit (3), among which: the earphone body (1) is provided with a front end (11) ), a rear end (12) and an air flow passage (13) penetrating the front end (11) and the rear end (12). An accommodating space (14) is arranged inside the earphone body (1) near the periphery of the air flow channel (13).

The speaker (2) is arranged in the accommodating space (14) of the earphone body (1). The speaker (2) is correspondingly provided with a vibrating membrane (21), and the speaker (2) is connected with a signal line (22) that penetrates the earphone body (1).

The muffler unit (3) is arranged in the air flow channel (13) near the rear end (12). The muffler unit (3) is provided with an input end (31) and an output end (32). The input end (31) is located inside the air flow channel (13) and is connected to the air flow channel (13) through. The output end (32) is located outside the air flow channel (13). The muffler unit (3) is provided with a plurality of mutually connected muffler chambers (33) (as shown in the third figure), and the inner cavity of each muffler chamber (33) is directed from the input end (31) to the output The directions of the ends (32) are respectively a cone shape (34) that is gradually expanding and then retracting. The muffler cavities (33) are arranged from the input end (31) toward the output end (32) to form a gradually The constricted straight path can effectively attenuate the transmission of sound waves.

In use, as shown in Figures 4 and 5, the front end (11) of the headset body (1) is worn in an ear (A) so that the front end (11) of the headset body (1) can It is attached to an ear canal (A1) of the ear (A), so that the earphone body (1) can be fixed. When playing audio, a sound signal is externally input through the signal line (22), and the sound signal can be sent to the speaker (2). The speaker (2) vibrates through the diaphragm (21) and emits a sound wave, which can pass through the air flow channel (13) and output from the front end (11) of the headphone body (1), and then enter the Inside the ear canal (A1) of the ear (A). When the sound wave is reflected from an eardrum (A2) of the ear (A), the sound wave will be reflected back into the air channel (13) through the ear canal (A1), and then the sound wave will pass through the air channel (13), through the input end (31) of the muffler unit (3), sequentially enter the muffler chambers (33) (as shown in the sixth figure), when the sound wave enters close to the input end (31) ) Is inside the muffler cavity (33), the muffler cavity (33) is arranged from the input end (31) toward the output end (32) to form a tapered straight path, which can reduce Part of the sound wave The speed makes the sound wave lag. The sound wave passes through each independent muffler cavity (33) in sequence, and is finally transmitted to the outside through the output terminal (32) of the muffler unit (3), so that after the sound wave is attenuated, there will be no Part of the sound wave leaks out of the earphone body (1) and is heard by people around the earphone. At the same time, the sound wave can be effectively attenuated to avoid excessive low frequencies, thereby improving the bass sound quality without causing sound quality distortion. At the same time, through the air channel (13) that penetrates the front end (11) and the rear end (12) of the earphone body (1), the ear canal (A1) of the ear (A) can be directly connected to the outside world Therefore, the sound wave will not travel back and forth in the ear canal (A1), except that the pressure in the ear canal (A1) can be balanced, and the pressure in the ear canal (A1) can be relieved, thereby reducing the impact of the sound wave on the The eardrum (A2) causes abnormal pressure. Therefore, whether the headphones are over-ear headphones or earbud headphones, or any other types of headphones, such as ear canal, ear-hook, neck-hook, Bluetooth wireless, full-face headset, noise-resistant, semi- The hood head-mounted type, rear open type or rear closed type, etc., as long as the structure of the muffler unit (3) and its muffler cavity (33) are provided, are all within the protection scope of the present invention.

Based on the description of the above-mentioned embodiments, when one can fully understand the operation and use of the present invention and the effects of the present invention, the above-mentioned embodiments are only preferred embodiments of the present invention, and the implementation of the present invention cannot be limited by this. The scope, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the description of the invention, are all within the scope of the present invention.

(1): Headphone body

(11): Front end

(12): Backend

(13): Air flow path

(14): Housing space

(2): Speaker

(21): Vibrating film

(22): Signal line

(3): Muffler unit

(31): Input

(32): Output

(33): Silence Chamber

(34): Conical

Claims (5)

A structure for controlling pressure reduction and sound leakage of an earphone includes: an earphone body provided with a front end, a rear end and an air flow passage, the air flow passage runs through the front end and the rear end, and the earphone body is provided with a The accommodating space; a loudspeaker is arranged in the accommodating space, the loudspeaker is correspondingly provided with a vibrating membrane; a muffler unit is arranged in the air flow channel, the muffler unit is provided with an input end and an output end, the input end Is connected to the air flow channel, the input end is located inside the air flow channel, and the output end is located outside the air flow channel. The muffler unit is provided with a plurality of muffler cavities continuously connected to each other. The inner cavity of the silencing cavity is set from the input end to the output end to be gradually expanded and then retracted. Each of the silencing cavities communicated with each other is formed with an inwardly contracted section toward the output end. The cavities are arranged together from the input end toward the output end to form a tapered straight path. For example, the structure for controlling pressure reduction and sound leakage of the earphone described in item 1 of the scope of patent application, wherein the inner cavity of the muffler cavity is provided in a conical shape. For example, the structure for controlling pressure reduction and sound leakage of the earphone described in the first item of the scope of patent application, wherein the muffler unit is arranged in the air flow channel near the rear end. For example, the structure for controlling pressure reduction and sound leakage of the earphone described in item 1 of the scope of patent application, wherein the accommodating space is provided inside the earphone body at a position close to the periphery of the air flow channel. For example, the structure for controlling pressure reduction and sound leakage of the earphone described in the first item of the scope of patent application, wherein the loudspeaker is connected to a signal line for signal, and the signal line runs through the earphone body.

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