Earphone

Abstract

The earphone is characterized in that a transverse partition plate located in an earphone cavity divides the earphone cavity into a sound cavity and an outer cavity, a loudspeaker unit comprises a loudspeaker support, a bass loudspeaker and a treble loudspeaker, the bass loudspeaker and the treble loudspeaker are installed in the loudspeaker support, and the loudspeaker unit is installed in the sound cavity. The loudspeaker unit divides the sound cavity into a front sound cavity and a rear sound cavity, and the rear sound cavity is divided into a low-pitch rear sound cavity communicated with the low-pitch loudspeaker and a high-pitch rear sound cavity communicated with the high-pitch loudspeaker. The housing main body is provided with a sound outlet communicated with the front sound cavity, a low-pitch tuning hole communicated with the low-pitch rear sound cavity, and a high-pitch tuning hole communicated with the high-pitch rear sound cavity. The high-pitch loudspeaker and the low-pitch loudspeaker are arranged in the earphone, the independent sound leakage cavities are adopted, airflow paths are optimized for different frequency bands, frequency band interference is avoided, low-frequency energy is isolated, high-frequency clearness is kept, and the independent sound leakage cavities can keep a complete frequency response curve.

Description

Technical Field

[0001] The invention belongs to the technical field of earphone products, and in particular relates to an earphone with a tweeter and a woofer. Background Art

[0002] The sound cavity in the earphone includes the front sound cavity and the rear sound cavity. The rear sound cavity is provided with a tuning hole (also called a pressure relief hole or a vent hole). The tuning hole has the function of balancing the air pressure and improving the wearing comfort. When the earphone is in a closed state, the vibration of the diaphragm will cause the air pressure in the cavity to change (especially at low frequencies), which may cause the eardrum to feel oppressed. The tuning hole releases pressure to avoid the "stuffy ear" effect and improve the comfort of long-term wearing.

[0003] In addition, in order to improve the sound effect of the headset, a Bluetooth headset with multiple speaker units is currently available on the market. At least two speakers are arranged in this headset. The two speakers are a woofer and a tweeter, which produce mid-bass or mid-high tones through a frequency division circuit. A common method is to set the tweeter and woofer in the sound cavity in the headset cavity. See patent document number CN210536918U, a utility model patent for an in-ear headset, which adopts the following technical solution: a two-frequency division circuit module is arranged in the headset housing, and a mid-high frequency speaker and a mid-low frequency speaker are respectively connected to the audio output end of the two-frequency division circuit module; an independent front cavity is arranged between the sound output side of the mid-high frequency speaker and the mid-low frequency speaker and the inner wall of the headset housing, and the outlets of the two groups of the front cavities are connected to a sound guide tube, and a middle partition is arranged in the sound guide tube, and the middle partition divides the headset into a mid-high frequency sound output channel corresponding to the mid-high frequency speaker, and a mid-low frequency sound output channel corresponding to the mid-low frequency speaker.

[0004] The two speakers in the above-mentioned prior art are arranged horizontally. Since the overall volume of general headphones is relatively small, this method is difficult to implement for ordinary headphones. Therefore, most of the products currently used are coaxial composite dual speaker products, which use a coaxial structure to combine tweeters and woofers. For example, the utility model patent with patent document number CN222464803U and name is a coaxial speaker for tweeters and basses; the utility model patent with patent document number CN218336418U and name is a dynamic flat-panel composite coaxial speaker. Although this coaxial composite dual speaker product can be directly applied to headphones, the two speakers share the front sound cavity and the rear sound cavity (pressure relief cavity). Since the strong air pressure fluctuations of the low frequency share the cavity with the high frequency, it may cause high-frequency distortion or interference distortion.

[0005] In view of the above, the present invention proposes the following technical solutions. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an earphone that combines a tweeter and a woofer. The earphone has a tweeter and a woofer that are arranged in parallel, and the tweeter and the woofer adopt an independent rear sound cavity design, which is conducive to optimizing the acoustic characteristics of different frequency bands and avoiding mutual interference, thereby improving the overall sound quality.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: the earphone comprises: a shell body, a cover body, a transverse partition, a speaker unit and a circuit board, wherein the shell body and the cover body cooperate with each other to form an earphone cavity, the transverse partition located in the earphone cavity divides the earphone cavity into a sound cavity and an external cavity, the circuit board is located in the external cavity and is installed on the transverse partition; the speaker unit comprises: a speaker bracket and a woofer and a tweeter installed in the speaker bracket, the speaker unit is installed in the sound cavity, and the speaker unit divides the sound cavity into a front sound cavity and a rear sound cavity, the rear sound cavity is isolated into a bass rear sound cavity connected to the woofer, and a treble rear sound cavity connected to the tweeter; the shell body is provided with a sound outlet connected to the front sound cavity, a bass tuning hole connected to the bass rear sound cavity, and a treble tuning hole connected to the treble rear sound cavity; the sound generated by the woofer enters the front sound cavity and is conducted out through the sound outlet; the sound generated by the tweeter enters the front sound cavity and is conducted out through the sound outlet.

[0008] Furthermore, in the above technical solution, a longitudinal partition is integrally formed in the shell body, and the internal cavity of the shell body is divided into a left space and a right space by the longitudinal partition. The left space cooperates with the transverse partition to form the sound cavity; the outer cavity is connected to the right space.

[0009] Furthermore, in the above technical solution, a microphone groove is formed in the right space, and a sound receiving pipe is installed in the microphone groove. One end of the sound receiving pipe is connected to the sound receiving hole on the shell body, and the other end of the sound receiving pipe is connected to the sound receiving microphone on the circuit board.

[0010] Furthermore, in the above technical solution, the woofer and the tweeter are arranged horizontally in a speaker bracket, and a bass connecting hole and a treble connecting hole are provided on the speaker bracket; the back of the woofer is connected to the bass rear sound cavity through the bass connecting hole, and the back of the tweeter is connected to the treble rear sound cavity through the treble connecting hole.

[0011] Furthermore, in the above technical solution, the cavity volume ratio of the bass rear cavity and the treble rear cavity is 1:2~1:3.

[0012] Furthermore, in the above technical solution, a first positioning portion, a second positioning portion and a third positioning portion are sequentially arranged on the inner wall of the shell body from the opening end downward, wherein the first positioning portion is used to cooperate with the cover body to achieve a fixed connection between the shell body and the cover body; the second positioning portion is used to cooperate with the transverse partition; and the third positioning portion cooperates with the outer edge of the speaker bracket.

[0013] Furthermore, in the above technical solution, the bass tuning hole and the treble tuning hole provided in the shell body are located between the second positioning portion and the third positioning portion.

[0014] Furthermore, in the above technical solution, a snap-fit ​​piece is formed at the open end of the transverse partition, and the transverse partition is positioned in the second positioning portion by the snap-fitting between the snap-fit ​​piece and the side wall of the shell body; and notches are respectively provided on both sides of the open end of the transverse partition corresponding to the positions of the bass tuning hole and the treble tuning hole.

[0015] Furthermore, in the above technical solution, the earphone is an ear-hook earphone, which includes an earphone part and an ear-hook part. The shell body, cover body, transverse partition, speaker unit and circuit board constitute the earphone part; the woofer and tweeter are installed side by side along the long axis direction of the earphone.

[0016] Furthermore, in the above technical solution, the sound outlet is located in the middle area between the woofer and the tweeter.

[0017] After adopting the above technical solution, the present invention has the following advantages over the prior art: the present invention sets high and low frequency speakers in the earphones, and adopts an independent sound leakage cavity to optimize the airflow path for different frequency bands, avoid frequency band interference, isolate low-frequency energy, and keep high-frequency clarity. The independently designed sound leakage cavity can retain a complete frequency response curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a stereogram of the present invention from a first viewing angle; Figure 2 is a stereogram of the second viewing angle of the present invention; Figure 3 is a stereogram of the present invention from a third viewing angle; Figure 4 is a three-dimensional exploded view of the present invention; Figure 5 is a three-dimensional diagram of a transverse partition in the present invention; Figure 6 is a three-dimensional diagram of the housing body of the present invention; Figure 7 is a stereogram of a speaker unit in the present invention; Figure 8 is a cross-sectional view of the present invention along the long axis direction of the earphone; Fig. 9 It is a cross-sectional view of the earphone part of the present invention along the short axis direction. DETAILED DESCRIPTION

[0019] The present invention is further described below by taking an earhook type headset as an example and accompanying drawings.

[0020] See Figures 1 to 9 As shown, this embodiment is an earhook type earphone, which includes an earphone part 91 and an earhook part 92. The earphone sound generating part is installed in the earphone part 91, and the battery power supply part is installed in the earhook part 92. The earhook type earphone is worn on the auricle of the user through the earhook part 92.

[0021] Usually, the earphone part 91 of the earhook earphone is generally in the shape of an oblong or ellipse. That is, its length along the long axis direction is greater than its length along the short axis direction. Compared with the earplug earphone, the earphone part 91 of the earhook earphone has a relatively large lateral space. Through a reasonable structural design, two speakers can be installed in parallel, thereby achieving independent high-pitched and low-pitched sound effects through the frequency division circuit.

[0022] Combination Figure 3 As shown, the earphone part 91 of the embodiment of the present invention comprises: a shell body 1, a cover body 2, a transverse partition 3, a speaker unit 4 and a circuit board 5. The shell body 1 has a cavity, and the cover body 2 is fixed to the open end of the cavity by snapping or welding. The shell body 1 and the cover body 2 cooperate with each other to form an earphone shell of the earphone part 91, and an earphone cavity 100 is formed in the earphone shell.

[0023] The lower end surface of the shell body 1 is provided with a sound outlet 10, and the front and rear sides of the shell body 1 are respectively provided with a bass tuning hole 11 and a treble tuning hole 12. Sound nets are respectively installed at the sound outlet 10, the bass tuning hole 11 and the treble tuning hole 12.

[0024] A sound receiving hole 15 is also provided on one side of the shell body 1 connected to the ear hook 92, and the sound receiving hole 15 is used for receiving sound by the sound receiving microphone 6 for conversation.

[0025] The transverse partition 3 is installed horizontally in the earphone cavity 100 to divide the earphone cavity 100 into: a sound cavity 101 located on the lower side and an external cavity 102 on the upper side. The sound cavity 101 is used to install the speaker unit 4. The circuit board 5 is located in the external cavity 102 and is fixedly installed above the transverse partition 3.

[0026] The shell body 1 has an integrally formed longitudinal partition 13, which divides the shell body 1 cavity into a left space and a right space 105. The left space cooperates with the transverse partition 3 to form a sound cavity 101 of the earphone part 91; the outer cavity 102 is connected to the right space 105.

[0027] The right side space 105 is used to install other related parts in the earphone. In this embodiment, a microphone slot 14 is provided in the right side space 105, and the microphone slot 14 is formed integrally with the shell body 1. A sound receiving pipe 61 is installed in the microphone slot 14, one end of the sound receiving pipe 61 is connected to the sound receiving hole 15 on the shell body 1, and the other end of the sound receiving pipe 61 is connected to the sound receiving microphone 6 on the circuit board 5. The electrodes used for charging in the earphone, the magnets 8 used for generating charging adsorption alignment, etc. are also installed in the right side space 105.

[0028] Combination Figure 8 As shown, the sound cavity 101 of the present invention forms a relatively independent cavity through the transverse partition 3 and the longitudinal partition 13, which is used to install the speaker unit 4, thereby isolating the sound-emitting part from other components, which not only facilitates assembly, but also avoids interference between the assembled components.

[0029] The speaker unit 4 includes: a speaker bracket 40, a woofer 41 and a tweeter 42 installed in the speaker bracket 40. The speaker unit 4 is installed in the sound cavity 101, and the speaker unit 4 divides the sound cavity 101 into a front sound cavity 103 adjacent to the sound outlet 10 and a rear sound cavity 104 adjacent to the transverse partition 3. The rear sound cavity 104 is isolated into a bass rear sound cavity 1041 connected to the woofer 41 and a tweeter rear sound cavity 1042 connected to the tweeter 42.

[0030] The speaker bracket 40 is in the shape of a cap with an opening downward, and the woofer 41 and the tweeter 42 are installed side by side along the long axis of the earphone part 91. The sound outlet surfaces of the two speakers face downward toward the sound outlet 10, that is, the two speakers share a front sound cavity 103. In order to avoid attenuation caused by reflection of sound waves, the diameter of the opening area of ​​the sound outlet 10 matches the diameter of the speaker sound outlet surface, and the sound outlet 10 should be roughly located in the middle area of ​​the woofer 41 and the tweeter 42. In this way, after the sound emitted by the woofer 41 and the tweeter 42 enters the front sound cavity 103, it can be directly output from the sound outlet 10, reducing the attenuation caused by sound reflection.

[0031] A portion of the top of the speaker bracket 40 is tightly combined with the bottom surface of the horizontal partition 3, and the speaker bracket 40 is used to separate the rear sound cavity 104 into two independent areas, which are the bass rear sound cavity 1041 connected to the woofer 41 and the treble rear sound cavity 1042 connected to the tweeter 42. Specifically, the top of the speaker bracket 40 is provided with a bass communication hole 401 and a treble communication hole 402 on two opposite sides. The bass communication hole 401 is connected to the rear side of the diaphragm of the woofer 41, and the treble communication hole 402 is connected to the rear side of the diaphragm of the tweeter 42. At the same time, the bass communication hole 401 is connected to the bass rear sound cavity 1041, and the treble communication hole 402 is connected to the treble rear sound cavity 1042. In this way, the bass rear sound cavity 1041 and the treble rear sound cavity 1042 are isolated from each other as the sound leakage cavity of the woofer 41 and the tweeter 42, respectively, and do not interfere with each other.

[0032] In headphone products, for products with dual speakers for treble and bass, the sound wave characteristics of treble and bass are very different. The wavelength of low frequency is longer, requiring a larger air chamber and slow air pressure release, while the wavelength of high frequency is short, requiring rapid pressure release to reduce reflection and phase distortion. The present invention uses independent sound leakage chambers for treble and bass speakers to optimize airflow paths for different frequency bands, avoid frequency band interference, isolate low-frequency energy, and keep high frequencies clear. The independently designed sound leakage chamber can retain a complete frequency response curve.

[0033] In addition, for a woofer, since the wavelength of low frequency is long, a larger air chamber and slow air pressure release are required. Therefore, in this embodiment, the size of the bass rear sound cavity 1041 and the treble rear sound cavity 1042 can be adjusted as needed, and usually the cavity volume ratio of the bass rear sound cavity 1041 and the treble rear sound cavity 1042 is 1:2~1:3.

[0034] During installation, the inner wall of the housing body 1 is provided with a first positioning portion 16, a second positioning portion 17 and a third positioning portion 18 in sequence from the opening end downward, wherein the first positioning portion 16 is used to form a match with the cover body 2 to achieve a fixed connection between the housing body 1 and the cover body 2. The second positioning portion 17 is used to match with the horizontal partition 3. The third positioning portion 18 matches with the outer edge of the speaker bracket 40.

[0035] The bass tuning hole 11 and the treble tuning hole 12 formed in the housing body 1 are located between the second positioning portion 17 and the third positioning portion 18 .

[0036] Combination Figure 5 , Fig. 9As shown, the transverse partition 3 is generally in the shape of a cap with an opening downward, and a positioning pin is formed on the top surface thereof for fixing the circuit board 5. A snap-fit ​​piece 31 is formed at the open end of the transverse partition 3, and the snap-fit ​​piece 31 is engaged with the snap-fit ​​on the side wall of the housing body 1 to position the transverse partition 3 on the second positioning portion 17. In order to achieve the connection between the bass tuning hole 11, the treble tuning hole 12 and the bass rear sound cavity 1041, the treble rear sound cavity 1042, notches 32 are respectively formed on both sides of the open end of the transverse partition 3.

[0037] An upper notch 30 is formed at the lower end of the side wall of the transverse partition 3 adjacent to the longitudinal partition 13, and a corresponding lower notch 130 is formed on the longitudinal partition 13. The holes formed by the upper and lower notches are used for wires to pass through. A wire hole 400 is formed on the speaker bracket 40 at positions corresponding to the upper notch 30 and the lower notch 130, which is used to connect the woofer 41, the tweeter 42 and the circuit board 5 through wires.

[0038] In addition, a touch control FPC circuit board 7 is arranged on the inner surface of the cover 2 and above the circuit board 5, and the FPC circuit board 7 is electrically connected to the circuit board 5 through electrodes. A noise reduction hole 21 is opened on the cover 2, and the noise reduction hole 21 corresponds to the noise reduction microphone 62 on the circuit board 5, which is used to collect external noise of the earphone.

[0039] During operation, the sound generated by the woofer 41 enters the front sound cavity 103 and is then conducted out through the sound outlet 10; the bass rear sound cavity 1041 corresponding to the woofer 41 serves as an independent sound leakage cavity and is adjusted through the bass tuning hole 11; the sound generated by the tweeter 42 enters the front sound cavity 103 and is then conducted out through the sound outlet 10, and the treble rear sound cavity 1042 corresponding to the tweeter 42 serves as an independent sound leakage cavity and is adjusted through the treble tuning hole 12.

[0040] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A headset, comprising: A housing body, a cover body, a transverse partition, a speaker unit and a circuit board, wherein the housing body and the cover body cooperate with each other to form an earphone cavity, characterized in that: The transverse partition located in the earphone cavity divides the earphone cavity into an acoustic cavity and an external cavity, and the circuit board is located in the external cavity and mounted on the transverse partition; The speaker unit comprises: a speaker bracket and a woofer and a tweeter installed in the speaker bracket, the speaker unit is installed in a sound cavity, and the speaker unit divides the sound cavity into a front sound cavity and a rear sound cavity, the rear sound cavity is isolated into a bass rear sound cavity connected to the woofer, and a treble rear sound cavity connected to the tweeter; The shell body is provided with a sound outlet connected to the front sound cavity, a bass tuning hole connected to the bass rear sound cavity, and a treble tuning hole connected to the treble rear sound cavity; The sound produced by the woofer enters the front sound cavity and is conducted out through the sound outlet; The sound produced by the tweeter enters the front sound cavity and is conducted out through the sound outlet.

2. The earphone according to claim 1, characterized in that: A longitudinal partition is integrally formed in the shell body, and the inner cavity of the shell body is divided into a left space and a right space by the longitudinal partition. The left space cooperates with the transverse partition to form the sound cavity; the outer cavity is connected to the right space.

3. The earphone according to claim 2, characterized in that: A microphone slot is formed in the right side space, and a sound receiving pipe is installed in the microphone slot. One end of the sound receiving pipe is connected to the sound receiving hole on the shell body, and the other end of the sound receiving pipe is connected to the sound receiving microphone on the circuit board.

4. The earphone according to claim 1, characterized in that: The woofer and the tweeter are arranged transversely and installed in a speaker bracket, and a woofer communication hole and a tweeter communication hole are provided on the speaker bracket; The back of the woofer is connected to the bass rear sound cavity through a bass communication hole, and the back of the tweeter is connected to the treble rear sound cavity through a treble communication hole.

5. The earphone according to claim 1, characterized in that: The cavity volume ratio of the bass rear sound cavity and the treble rear sound cavity is 1:2~1:

3.

6. The earphone according to claim 1, characterized in that: The inner wall of the shell body is provided with a first positioning portion, a second positioning portion and a third positioning portion in sequence from the opening end downward, wherein the first positioning portion is used to cooperate with the cover body to achieve a fixed connection between the shell body and the cover body; the second positioning portion is used to cooperate with the transverse partition; and the third positioning portion cooperates with the outer edge of the speaker bracket.

7. The earphone according to claim 6, characterized in that: The bass tuning hole and the treble tuning hole formed on the shell body are located between the second positioning portion and the third positioning portion.

8. The earphone according to claim 6, characterized in that: A snap-fit ​​piece is formed at the open end of the transverse partition, and the transverse partition is positioned at the second positioning portion by the snap-fitting of the snap-fit ​​piece and the snap-fitting piece on the side wall of the shell body; notches are respectively provided on both sides of the open end of the transverse partition corresponding to the positions of the bass tuning hole and the treble tuning hole.

9. An earphone according to any one of claims 1 to 8, characterized in that: The earphone is an ear-hook earphone, which comprises an earphone part and an ear-hook part. The earphone part is composed of a shell body, a cover body, a transverse partition, a speaker unit and a circuit board; the woofer and the tweeter are installed in parallel along the long axis direction of the earphone.

10. The earphone according to claim 9, characterized in that: The sound outlet is located in the middle area between the woofer and the tweeter.

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