Earphone rear cavity sound guide structure

Abstract

The utility model discloses an earphone rear cavity sound guide structure, which comprises an earphone shell, a rear cavity body, a front cover sheet, a rear cover sheet and sound absorption cotton, the rear cavity body is provided with a front spiral sound guide groove and a rear spiral sound guide groove communicated with the front spiral sound guide groove, the front and rear cover sheets are correspondingly covered on the front and rear spiral sound guide grooves, and the sound absorption cotton is arranged on the front and rear cover sheets. The sound-absorbing cotton is arranged in the rear sound cavity of the rear cavity body, and the sound-absorbing cotton is arranged in the rear sound cavity of the rear cavity body. The loudspeaker is reasonable in structural design, the front spiral sound guide groove and the rear spiral sound guide groove are ingeniously formed in the rear cavity and covered and sealed through the front cover piece and the rear cover piece to form a long spiral guide pipe, the sound absorption cotton is matched, the air damping of the rear cavity of the loudspeaker can be effectively adjusted, the sound quality of the loudspeaker can be adjusted and controlled on the physical property, and the loudspeaker is convenient to use. According to the technical scheme of the utility model, the sound pressure at the frequency of about 150Hz can be adjusted without the adjustment of a Bluetooth filter, so that the low frequency is elastic and free of head bombardment feeling, the human voice is relatively natural and warm, and a user can enjoy better sound quality experience.

Description

Technical Field

[0001] The utility model relates to the technical field of speakers, and particularly relates to a sound guiding structure for the rear cavity of an earphone. Background Art

[0002] With the development of electroacoustic technology, lossless sound sources, and the improvement of living standards, consumers' requirements for earphones, which are the direct devices for sound quality output, are getting higher and higher. To meet the sound effects, the Bluetooth earphones on the market generally adjust the sound effects of the earphones through the filter adjustment of the Bluetooth chip. This method has disadvantages because only through the filter adjustment, the sound will become rigid and unnatural. Controlling the level of the signal will disrupt the smooth operation of some receivers, making the low-frequency sound effect style of the earphones relatively rigid. Content of the Utility Model

[0003] Aiming at the above deficiencies, the purpose of the utility model is to provide a sound guiding structure for the rear cavity of an earphone with reasonable structural design, which adjusts the sound effects through physical properties and makes the low frequency of the earphone more elastic.

[0004] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0005] A sound guiding structure for the rear cavity of an earphone, which includes an earphone housing, a rear cavity, a front cover plate, a rear cover plate, and a sound-absorbing cotton. The rear cavity is arranged inside the earphone housing. The rear cavity is provided with a rear sound cavity corresponding to the position of the speaker rear cavity of the earphone housing. The front spiral sound guiding groove is arranged in the rear sound cavity. On the other side of the rear sound cavity, a rear spiral sound guiding groove communicated with the front spiral sound guiding groove is arranged on the rear cavity. The front cover plate covers the front spiral sound guiding groove and is provided with a sound inlet hole. The rear cover plate covers the rear spiral sound guiding groove and is provided with a sound outlet hole. The sound-absorbing cotton is located in the rear sound cavity.

[0006] As a preferred scheme of the utility model, the cross-sectional outer contour of the rear sound cavity is crescent-shaped, and the cross-sectional outer contour of the sound-absorbing cotton is crescent-shaped, with good matching effect.

[0007] As a preferred scheme of the utility model, the direction of the front spiral sound guiding groove is spirally extended from the outside to the inside in sequence, and the direction of the rear spiral sound guiding groove is spirally extended from the inside to the outside in sequence. The spiral extension path helps to adjust the air damping of the speaker rear cavity, making the low frequency elastic and without a booming feeling.

[0008] As a preferred scheme of the utility model, a notch is formed at a corner position of the front cover plate to form the sound inlet hole, and a notch is formed at a corner position of the rear cover plate to form the sound inlet hole. The structural design is simple and reasonable.

[0009] As a preferred embodiment of the present utility model, a through hole for communicating the front spiral sound guiding groove and the rear spiral sound guiding groove is provided on the rear cavity, which helps to continuously transmit sound, ensures smooth transition of sound between different sound guiding grooves, and forms a more coherent and natural sound effect experience.

[0010] As a preferred embodiment of the present utility model, both the front cover sheet and the rear cover sheet are PET with adhesive on one side, which is convenient for assembly.

[0011] The beneficial effects of the present utility model are as follows: The structure of the present utility model is reasonably designed. A front spiral sound guiding groove and a rear spiral sound guiding groove are ingeniously provided on the rear cavity, and a relatively long spiral conduit is formed by covering and sealing with the front cover sheet and the rear cover sheet, and is combined with a sound absorbing cotton, which can effectively adjust the air damping of the rear cavity of the speaker, and physically regulate the sound quality of the speaker. It can adjust the sound pressure of the frequency near 150 Hz without adjusting through a Bluetooth filter, making the low frequency rich in elasticity and without a booming feeling, and the human voice is more cordial and natural.

[0012] The following further describes the present utility model in conjunction with the drawings and embodiments. Description of the Drawings

[0013] Figure 1 is a three-dimensional structure schematic diagram of the present utility model.

[0014] Figure 2 is an exploded structure schematic Figure 1 .

[0015] Figure 3 is an exploded structure schematic Figure 2 .

[0016] Figure 4 is a structure schematic diagram of the middle cavity and the front cover sheet of the present utility model.

[0017] Figure 5 is a front view structure schematic diagram of the middle cavity of the present utility model.

[0018] Figure 6 is a structure schematic diagram of the middle cavity and the rear cover sheet of the present utility model.

[0019] Figure 7 is a comparative frequency response curve graph before and after the use of the present utility model. Detailed Embodiments

[0020] Referring to Figures 1 to 7 , a sound guiding structure for the rear cavity of an earphone provided in this embodiment includes an earphone housing 1, a rear cavity 2, a front cover sheet 3, a rear cover sheet 4, and a sound absorbing cotton 5, and the rear cavity 2 is disposed inside the earphone housing 1.

[0021] The rear cavity 2 is provided with a rear sound cavity 21 corresponding to the position 11 of the speaker within the earphone housing 1. The outer contour of the cross-section of the rear sound cavity 21 is preferably crescent-shaped. The sound-absorbing cotton 5 is located within the rear sound cavity 21, and the outer contour of the cross-section of the sound-absorbing cotton 5 is also preferably crescent-shaped, with good matching effect.

[0022] A front spiral sound guide groove 22 is provided within the rear sound cavity 21. The direction of the front spiral sound guide groove 22 extends spirally from the outside to the inside in sequence. On the other side of the rear sound cavity 21 relative to the rear cavity 2, a rear spiral sound guide groove 23 is provided and is connected to the front spiral sound guide groove 22. Specifically, a through hole 24 for connecting the front spiral sound guide groove 22 and the rear spiral sound guide groove 23 is provided on the rear cavity 2, which helps the continuous transmission of sound, ensures the smooth transition of sound between different sound guide grooves, and forms a more coherent and natural sound effect experience. The direction of the rear spiral sound guide groove 23 extends spirally from the inside to the outside in sequence. The spiral extension path helps to adjust the air damping of the rear cavity of the speaker, making the low frequency rich in elasticity and without a booming feeling.

[0023] Preferably, both the front cover piece 3 and the rear cover piece 4 are PETs with adhesive on one side. The front cover piece 3 is covered on the front spiral sound guide groove 22 through the adhesive, and is provided with a sound inlet hole 221. Specifically, a notch 31 is provided at a corner position of the front cover piece 3 to form the sound inlet hole 221. The rear cover piece 4 is covered on the rear spiral sound guide groove 23 through the adhesive, and is provided with a sound outlet hole 231. Specifically, a notch is provided at a corner position of the rear cover piece 4 to form the sound inlet hole 221.

[0024] During use, since the front spiral sound guide groove 22 and the rear spiral sound guide groove 23 are provided on the rear cavity 2 and are covered and sealed by the front cover piece 3 and the rear cover piece 4 to form a spiral conduit with a relatively long length, and are combined with the sound-absorbing cotton 5, the air damping of the rear cavity of the speaker can be effectively adjusted, and the sound quality of the speaker can be regulated physically. Refer to Figure 7 After adopting the structure of the present utility model, the sound pressure of the frequency near 150 Hz can be adjusted without adjusting through a Bluetooth filter, making the low frequency rich in elasticity and without a booming feeling, and the human voice is more cordial and natural, enabling users to enjoy a better sound quality experience.

[0025] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the above specific embodiments, and any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present utility model all fall within the protection scope of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model. Other structures obtained by adopting the same or similar structures are all within the protection scope of the present utility model.

Claims

1. An earphone rear cavity sound guide structure, comprising an earphone housing, characterized in that: It also includes a rear cavity, a front cover, a rear cover and sound-absorbing cotton. The rear cavity is arranged in the earphone shell. The rear cavity is provided with a rear sound cavity corresponding to the speaker rear cavity position of the earphone shell. A front spiral sound guide groove is provided in the rear sound cavity. A rear spiral sound guide groove connected to the front spiral sound guide groove is provided on the rear cavity on the other side of the rear sound cavity. The front cover covers the front spiral sound guide groove and is provided with a sound inlet port. The rear cover covers the rear spiral sound guide groove and is provided with a sound outlet port. The sound-absorbing cotton is located in the rear sound cavity.

2. The earphone rear cavity sound guide structure according to claim 1, characterized in that: The cross-sectional profile of the rear sound cavity is crescent-shaped.

3. The earphone rear cavity sound guide structure according to claim 2, characterized in that: The cross-sectional profile of the sound-absorbing cotton is crescent-shaped.

4. The earphone rear cavity sound guide structure according to claim 1, characterized in that: The direction of the front spiral sound guide groove is to extend spirally from outside to inside in sequence.

5. The earphone rear cavity sound guide structure according to claim 4, characterized in that: A notch is provided at a corner of the front cover to form the sound inlet opening.

6. The earphone rear cavity sound guide structure according to claim 4, characterized in that: The direction of the rear spiral sound guide groove is to extend spirally from inside to outside in sequence.

7. The earphone rear cavity sound guide structure according to claim 6, characterized in that: A notch is provided at a corner of the rear cover to form the sound inlet opening.

8. The earphone rear cavity sound guide structure according to claim 1, characterized in that: The rear cavity is provided with a through hole which connects the front spiral sound guide groove and the rear spiral sound guide groove.

9. The earphone rear cavity sound guide structure according to any one of claims 1 to 8, characterized in that: The front cover sheet and the rear cover sheet are both PET with adhesive on one side.

Images