An earphone cavity structure capable of changing the sound field and timbre

Abstract

The present invention discloses a headphone cavity structure capable of changing the sound field and timbre, which includes a headphone housing and an earcap inner sleeve below the headphone housing. A first cavity and a second cavity connected to the first cavity are provided on the headphone housing. A sound field tuner is placed in the second cavity in a matching manner. A sound conduction hole communicating with the sound field tuner is provided on the bottom inner wall of the second cavity. A silicone earcap annular buckle groove is provided on the outer side of the earcap inner sleeve. An annular groove with an open top is formed on the side wall of the earcap inner sleeve, and a first circular tube is rotatably installed in the annular groove. The design of the present invention is reasonable. By using the different inherent resonance frequencies of sound field tuners made of different materials, the timbre and sound field can be corrected. And on the basis of the change, the symmetrical angles of the two sound guiding adjustment plates can be appropriately adjusted according to the needs and errors of different people, so as to further accurately and better change the reverberation time and timbre of the sound, making the sound more balanced and pleasant.

Description

Technical Field

[0001] The present invention relates to the technical field of in-ear headphones, and particularly relates to a headphone cavity structure capable of changing the sound field and tone color. Background Art

[0002] For in-ear headphones, the installation position of the speaker is restricted, and there are not many adjustable positions. The sound-emitting angle of the speaker is not the same as the sound-emitting angle of the sound outlet nozzle, resulting in unsmooth sound output. Although there are two-chamber headphone shells on the market, by placing sound field tuning sleeves made of different materials (such as copper, aluminum, silver, wood, etc.) in one of the chambers, the tone color and sound field are corrected by using the inherent resonance frequencies of different materials; however, once changed, it cannot be changed and adjusted again, which is not convenient for different people to adjust and correct according to actual needs. For some people who love high-quality and high-level music, the needs of different people will vary, and it is necessary to appropriately adjust the sound field and tone color by changing the sound output style. In view of this phenomenon, we have therefore proposed a headphone cavity structure capable of changing the sound field and tone color. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes a headphone cavity structure capable of changing the sound field and tone color.

[0004] A headphone cavity structure capable of changing the sound field and tone color proposed by the present invention includes a headphone housing and an ear cap inner sleeve below the headphone housing. A first cavity and a second cavity communicating with the first cavity are provided on the headphone housing. A sound field tuner is placed in the second cavity in a matching manner. A sound passage hole communicating with the sound field tuner is provided on the bottom inner wall of the second cavity. A silicone ear cap annular buckle groove is provided on the outer side of the ear cap inner sleeve. An annular groove with an open top is provided on the side wall of the ear cap inner sleeve, and a first circular tube is rotatably installed in the annular groove. The top end of the first circular tube extends above the ear cap inner sleeve and is fixed to the bottom of the headphone housing. The first circular tube communicates with the sound passage hole. A second circular tube is slidably sleeved in the first circular tube, and the bottom end of the second circular tube extends into the ear cap inner sleeve and is fixed with an external thread sleeve. The ear cap inner sleeve is threadedly sleeved on the external thread sleeve. Rectangular holes are provided on the front inner wall and the rear inner wall of the second circular tube. Two rotating shafts are rotatably installed between the front inner wall and the rear inner wall of the first circular tube. Both rotating shafts are located in the two rectangular holes. Inclined sound guiding adjustment plates are fixedly sleeved on the rotating shafts. The two sound guiding adjustment plates are symmetrically arranged. The mutually approaching sides of the two sound guiding adjustment plates are both serrated. Grooves with open sides on both sides are provided at the top of the sound guiding adjustment plate. Gears located in the corresponding grooves are fixedly sleeved on the rotating shafts. Rack bars are embedded on both inner walls of the second circular tube, and the rack bars are meshed with the corresponding gears.

[0005] Preferably, an annular chute is provided on the outer side of the first circular tube, and two semi-circular ring slide rails are fixedly connected in the annular groove. The two semi-circular ring slide rails form a complete circular ring track, and the circular ring track is slidably connected with the annular chute.

[0006] Preferably, a limiting hole is provided on the side wall of the first circular tube, a limiting block is fixedly connected to the outer side of the second circular tube, and the limiting block is slidably connected with the limiting groove.

[0007] Preferably, an internal thread is provided on the inner side of the inner sleeve of the ear cap, and the internal thread is threadedly connected with the external thread sleeve.

[0008] Preferably, bearings are fixedly connected to the inner walls of the front side and the rear side of the first circular tube, and the inner rings of the bearings are fixedly sleeved on the outer sides of the corresponding rotating shafts.

[0009] Preferably, first circular holes are provided on the inner walls of the front side and the rear side of the groove, and the side walls of the first circular holes are fixedly connected to the outer sides of the corresponding rotating shafts.

[0010] Preferably, a second circular hole is provided on the front side of the gear, and the side wall of the second circular hole is fixedly connected to the outer side of the corresponding rotating shaft.

[0011] Preferably, rectangular grooves are provided on both sides of the second circular tube, and the inner walls of the front side and the rear side of the rectangular groove are respectively fixedly connected to the front side and the rear side of the corresponding rack.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The setting of the sound field tuner can form an independent cavity. Different sound field guiding sleeves made of different materials can be adopted according to actual needs. By using the inherent resonance frequencies of different materials, just like musical instruments, for the same tone, when played with different musical instruments, the sounds are different, that is, the timbres are different. It can change the reverberation time and timbre of the sound, so that the sound is more balanced and pleasant. Its principle is actually to adjust the reverberation time of the sound by changing the shape and volume inside the headphone housing to achieve the effect of the on-site sound field;

[0014] When different personnel need to adapt and adjust, rotate the inner sleeve of the ear cap in the positive direction to drive the two semi-circular slide rails to slide in the circular chute. The rotation of the inner sleeve of the ear cap can drive the external thread sleeve to move upward. The external thread sleeve drives the two racks to move upward through the second round tube. When the two racks move upward, they can drive the two gears to rotate in opposite directions. The gears drive the sound guide adjustment plate to rotate through the corresponding rotating shafts. At this time, the two sound guide adjustment plates rotate in the direction away from each other, so as to be able to change the different symmetric angles formed by the two sound guide adjustment plates according to different needs, so that the area and position of the sound passing through during sound output will both change. When the bottoms of the two sound guide adjustment plates are closer, the space for the sound to pass through will be smaller. Then, using the serrations on the sound guide adjustment plate, resonance can be better formed, improving the sense of the surrounding and shocking live sound field. On the contrary, it is the opposite.

[0015] The design of the present invention is reasonable. By using the inherent different resonance frequencies of the sound field tuners made of different materials, the timbre and sound field can be corrected. And on this basis, the symmetric angles of the two sound guide adjustment plates can be appropriately adjusted according to the needs and errors of different personnel, realizing a further precise and better change in the reverberation time and timbre of the sound, making the sound more balanced and pleasant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention;

[0017] Figure 2 It is a top three-dimensional schematic view of the headphone housing of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention;

[0018] Figure 3 It is a three-dimensional schematic view of the sound field guiding sleeve of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention;

[0019] Figure 4 It is a top three-dimensional schematic view of the sound field guiding sleeve of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention;

[0020] Figure 5 It is Figure 1 the partial cross-sectional structure schematic view of part A in

[0021] Figure 6 It is a three-dimensional schematic view of the first round tube of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention;

[0022] Figure 7 It is a three-dimensional schematic view of the two semi-circular slide rails of a headphone cavity structure capable of changing the sound field and timbre proposed by the present invention.

[0023] In the figure: 1 earphone housing, 2 sound field tuner, 3 second cavity, 4 sound conduction hole, 5 inner sleeve of ear cap, 6 silicone ear cap annular buckle groove, 7 annular groove, 8 first round tube, 9 second round tube, 10 external thread sleeve, 11 rectangular hole, 12 rotating shaft, 13 rack, 14 sound conduction adjustment plate, 15 groove, 16 gear, 17 limit block, 18 circular ring chute, 19 semi-circular ring slide rail, 20 internal thread. Specific implementation mode

[0024] The present invention will be further explained below in conjunction with specific embodiments.

[0025] Embodiment

[0026] Referring to Figure 1-7 , this embodiment proposes an earphone cavity structure capable of changing the sound field and tone color, including an earphone housing 1 and an inner sleeve 5 of the ear cap below the earphone housing 1. A first cavity and a second cavity 3 communicated with the first cavity are arranged on the earphone housing 1. A sound field tuner 2 is placed in the second cavity 3 in a matching manner. The sound field tuner 2 can be made of different materials, such as copper, aluminum, silver, wood, etc. A sound conduction hole 4 communicated with the sound field tuner 2 is arranged on the bottom inner wall of the second cavity 3. A silicone ear cap annular buckle groove 6 is arranged on the outer side of the inner sleeve 5 of the ear cap. An annular groove 7 with an open top is formed on the side wall of the inner sleeve 5 of the ear cap. A first round tube 8 is rotatably installed in the annular groove 7. The top end of the first round tube 8 extends above the inner sleeve 5 of the ear cap and is fixedly connected to the bottom of the earphone housing 1. The first round tube 8 is communicated with the sound conduction hole 4. A second round tube 9 is slidably sleeved in the first round tube 8. The bottom end of the second round tube 9 extends into the inner sleeve 5 of the ear cap and is fixed with an external thread sleeve 10. The inner sleeve 5 of the ear cap is threadedly sleeved on the external thread sleeve 10. Rectangular holes 11 are formed on the front inner wall and the rear inner wall of the second round tube 9. Two rotating shafts 12 are rotatably installed between the front inner wall and the rear inner wall of the first round tube 8. Both rotating shafts 12 are located in the two rectangular holes 11. An inclined sound conduction adjustment plate 14 is fixedly sleeved on the rotating shaft 12. The two sound conduction adjustment plates 14 are symmetrically arranged. The sides of the two sound conduction adjustment plates 14 close to each other are both serrated. Grooves 15 with both sides open are formed at the top of the sound conduction adjustment plate 14. Gears 16 located in the corresponding grooves 15 are fixedly sleeved on the rotating shafts 12. Rack bars 13 are embedded on both inner walls of the second round tube 9. The rack bars 13 are meshed with the corresponding gears 16. The design of the present invention is reasonable. The inherent different resonance frequencies of the sound field tuners 2 made of different materials can correct the tone color and sound field, and on the basis of the change, the symmetrical angle of the two sound conduction adjustment plates 14 can be appropriately adjusted according to the needs and errors of different people, so as to further accurately and better change the reverberation time and tone color of the sound, and make the sound more balanced and pleasant.

[0027] In this embodiment, an annular chute 18 is provided on the outer side of the first circular tube 8. Two semi-circular ring slide rails 19 are fixedly connected in the annular groove 7. The two semi-circular ring slide rails 19 form a complete circular ring track, and the circular ring track is slidably connected with the annular chute 18. A limiting hole is provided on the side wall of the first circular tube 8. A limiting block 17 is fixedly connected to the outer side of the second circular tube 9, and the limiting block 17 is slidably connected with the limiting groove. An internal thread 20 is provided on the inner side of the inner sleeve 5 of the ear cap, and the internal thread 20 is threadedly connected with the external thread sleeve 10. Bearings are fixedly connected to the front inner wall and the rear inner wall of the first circular tube 8. The inner ring of the bearing is fixedly sleeved on the outer side of the corresponding rotating shaft 12. First circular holes are provided on the front inner wall and the rear inner wall of the groove 15, and the side wall of the first circular hole is fixedly connected to the outer side of the corresponding rotating shaft 12. A second circular hole is provided on the front side of the gear 16, and the side wall of the second circular hole is fixedly connected to the outer side of the corresponding rotating shaft 12. Rectangular grooves are provided on both sides of the second circular tube 9, and the front inner wall and the rear inner wall of the rectangular groove are respectively fixedly connected to the front side and the rear side of the corresponding rack 13. The design of the present invention is reasonable. The inherent different resonance frequencies of the sound field tuner 2 made of different materials can correct the timbre and sound field, and on the basis of the change, the symmetrical angle of the two sound guiding adjustment plates 14 can be appropriately adjusted according to the needs of different personnel, so as to further accurately and better change the reverberation time and timbre of the sound, making the sound more balanced and pleasant.

[0028] In this embodiment, the setting of the sound field tuner 2 can form an independent cavity. Different materials of the sound field tuner 2 can be adopted according to actual needs. Utilizing the inherent resonance frequencies of different materials, just like musical instruments, for the same pitch, when played with different musical instruments, the sounds emitted are different, which is the difference in timbre. It can change the reverberation time and timbre of the sound. Its principle is actually to adjust the reverberation time of the sound by changing the shape and volume inside the earphone housing 1 to achieve the effect of the on-site sound field.

[0029] When different personnel need to adaptively adjust the in-ear timbre and sound field on this basis according to actual needs, rotate the inner sleeve 5 of the ear cap in the positive direction. The inner sleeve 5 of the ear cap drives the circular ring track formed by the two semi-circular ring slide rails 19 to slide in the annular chute 18. Under the action of the internal thread 20, the rotation of the inner sleeve 5 of the ear cap can drive the external thread sleeve 10 to move upward. The external thread sleeve 10 drives the limiting block 17 to slide in the limiting hole through the second circular tube 9. The second circular tube 9 drives the two racks 13 to move upward. When the two racks 13 move upward, they can drive the two gears 16 to rotate in opposite directions. The gear 16 drives the sound guiding adjustment plate 14 to rotate through the corresponding rotating shaft 12. At this time, the two sound guiding adjustment plates 14 rotate in the direction away from each other. At this time, the angle between the two sound guiding adjustment plates 14 changes and the distance between them also changes, so that the symmetrical angle formed by the two sound guiding adjustment plates 14 can be changed according to different needs.

[0030] When the angle of the sound guiding adjustment plate 14 changes, both the area and position through which the sound passes during sound output will change. For example, when the bottoms of the two sound guiding adjustment plates 14 are relatively close, the space through which the sound is compressed and passes is smaller, and at this time, the inclination angle of the sound guiding adjustment plate 14 is relatively small. By using the serrations on the sound guiding adjustment plate 14, resonance can be better formed, enhancing the sense of the surrounding and shocking live sound field. On the contrary, vice versa, enabling the reverberation and timbre of the sound field to be appropriately adjusted according to the needs of different people. Generally speaking, it is like a person speaking directly and speaking to others after aligning the mouth with external sleeves of different sizes. There are errors in the timbre and sound field feeling heard.

[0031] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A headphone cavity structure capable of changing the sound field and timbre, comprising a headphone housing (1) and an earcap inner sleeve (5) below the headphone housing (1). A first cavity and a second cavity (3) connected to the first cavity are provided on the headphone housing (1). A sound field tuner (2) is placed in the second cavity (3) in a matching manner. A sound passage hole (4) communicating with the sound field tuner (2) is provided on the bottom inner wall of the second cavity (3). Characterized in that, A silicone earcap annular buckle groove (6) is provided on the outer side of the earcap inner sleeve (5). An annular groove (7) with an open top is provided on the side wall of the earcap inner sleeve (5). A first circular tube (8) is rotatably installed in the annular groove (7). The top end of the first circular tube (8) extends above the earcap inner sleeve (5) and is fixedly connected to the bottom of the headphone housing (1). The first circular tube (8) communicates with the sound passage hole (4). A second circular tube (9) is slidably sleeved in the first circular tube (8). The bottom end of the second circular tube (9) extends into the earcap inner sleeve (5) and is fixed with an external thread sleeve (10). The earcap inner sleeve (5) is threadedly sleeved on the external thread sleeve (10). Rectangular holes (11) are provided on the front inner wall and the rear inner wall of the second circular tube (9). Two rotating shafts (12) are rotatably installed between the front inner wall and the rear inner wall of the first circular tube (8). Both rotating shafts (12) are located in the two rectangular holes (11). An inclined sound guiding adjustment plate (14) is fixedly sleeved on the rotating shaft (12). The two sound guiding adjustment plates (14) are symmetrically arranged. The sides of the two sound guiding adjustment plates (14) close to each other are serrated. Grooves (15) with both sides open are provided at the top of the sound guiding adjustment plate (14). Gears (16) located in the corresponding grooves (15) are fixedly sleeved on the rotating shaft (12). Rack bars (13) are embedded on both inner walls of the second circular tube (9). The rack bars (13) are meshed with the corresponding gears (16).

2. The headphone cavity structure capable of changing the sound field and timbre according to claim 1, Characterized in that, A circular ring-shaped sliding groove (18) is provided on the outer side of the first circular tube (8). Two semi-circular ring-shaped sliding rails (19) are fixedly connected in the annular groove (7). The two semi-circular ring-shaped sliding rails (19) form a complete circular ring-shaped track. The circular ring-shaped track is slidably connected to the circular ring-shaped sliding groove (18).

3. The headphone cavity structure capable of changing the sound field and timbre according to claim 1, Characterized in that, A limiting hole is provided on the side wall of the first circular tube (8). A limiting block (17) is fixedly connected to the outer side of the second circular tube (9). The limiting block (17) is slidably connected to the limiting groove.

4. The headphone cavity structure capable of changing the sound field and timbre according to claim 1, Characterized in that, Internal threads (20) are provided on the inner side of the earcap inner sleeve (5). The internal threads (20) are threadedly connected to the external thread sleeve (10).

5. The headphone cavity structure capable of changing the sound field and timbre according to claim 1, Characterized in that, On the inner walls of the front side and the rear side of the first circular tube (8), bearings are fixedly connected, and the inner rings of the bearings are fixedly sleeved on the outer sides of the corresponding rotating shafts (12).

6. The headphone cavity structure capable of changing sound field and timbre according to claim 1, characterized in that, On the inner walls of the front side and the rear side of the groove (15), first round holes are formed, and the side walls of the first round holes are fixedly connected to the outer sides of the corresponding rotating shafts (12).

7. The headphone cavity structure capable of changing sound field and timbre according to claim 1, characterized in that, On the front side of the gear (16), a second round hole is formed, and the side wall of the second round hole is fixedly connected to the outer side of the corresponding rotating shaft (12).

8. The headphone cavity structure capable of changing sound field and timbre according to claim 1, characterized in that, On both sides of the second circular tube (9), rectangular grooves are formed, and the inner walls of the front side and the rear side of the rectangular grooves are respectively fixedly connected to the front side and the rear side of the corresponding rack (13).

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