CN111212367A

CN111212367A - Sound production module and electronic equipment

Info

Publication number: CN111212367A
Application number: CN201811401812.1A
Authority: CN
Inventors: 刘文展; 孙亚轩; 赵永吉; 赵波; 周美华
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2020-05-29
Anticipated expiration: 2038-11-22
Also published as: CN111212367B; WO2020103757A1

Abstract

The disclosure relates to a sound production module and an electronic device. The sounding module comprises a vibrating diaphragm, a moving iron unit, a sound guide tube and an earphone socket, wherein the moving iron unit is connected to one side of the vibrating diaphragm, a sound guide tube connecting hole is formed in the earphone socket, one end of the sound guide tube is connected with a sound outlet hole of the moving iron unit, and the other end of the sound guide tube is connected with the sound guide tube connecting hole of the earphone socket. In the sound production module of this disclosure, send the high frequency audio through the vibrating diaphragm, send the low frequency audio in order to supplement the low frequency part through leading note pipe and earphone socket to make tone quality more even complete.

Description

Sound production module and electronic equipment

Technical Field

The present disclosure relates to a sound module and an electronic device having the same.

Background

The earphone is one of the indispensable structures of the electronic equipment as an important part for converting an electric signal into mechanical energy in the electronic equipment so as to generate sound through vibration.

Patent document No. CN206559644U discloses a piezoelectric ceramic sound generating module and an electronic device, in which a piezoelectric ceramic sound generating element and a vibrating element are bonded together to form a piezoelectric ceramic sound generating module fixed on a through hole reserved in a frame of a housing, and the working mode is that the piezoelectric ceramic sound generating element vibrates to drive the vibrating element to vibrate to generate sound.

The above solution mainly has the following drawbacks: firstly, the piezoelectric ceramic sounding element is directly bonded on the vibrating element, so that a large amount of effective vibration area of the vibrating element is occupied, and the tone quality is influenced; secondly, the vibrating element adopts a thick plate special-shaped structure, has small vibration amplitude, is not suitable for small-sounding electric appliances such as mobile phone receivers and earphones, and cannot generate good sound; and thirdly, the design of a sound cavity is avoided, so that the centralized sounding and feedback of sound are influenced, and the tone quality is influenced.

Disclosure of Invention

The purpose of this disclosure is to provide a sound production module that vocal effect is better.

In order to achieve the above object, the present disclosure provides a sound production module, including a vibrating diaphragm, a moving iron unit, a sound guide tube and an earphone socket, the moving iron unit is connected to one side of the vibrating diaphragm, the earphone socket is provided with a sound guide tube connecting hole, one end of the sound guide tube is connected to a sound outlet hole of the moving iron unit, and the other end of the sound guide tube is connected to the sound guide tube connecting hole of the earphone socket.

Optionally, the diaphragm is made of a composite material.

Optionally, the moving iron unit is adhered to the diaphragm.

Optionally, the front surface of the moving iron unit is adhered to the diaphragm.

Optionally, the moving iron unit is adhered to the center of the diaphragm.

Optionally, the sound outlet hole of the moving iron unit is arranged towards the earphone socket.

Optionally, the length of the diaphragm is 15-20mm, the width is 5-10mm, and the thickness is 0.3-0.8 mm.

Optionally, the length of the moving iron unit is 7-10mm, the width of the moving iron unit is 3-5mm, and the thickness of the moving iron unit is 1-3 mm.

Optionally, the sound guide tube has a length of 20-30mm, an inner diameter of 1-2mm, and an outer diameter of 2-3 mm.

Another object of the present disclosure is to provide an electronic device with better sound production effect.

In order to achieve the above object, the present disclosure provides an electronic device including: the earphone comprises an equipment body, wherein a diaphragm hole and an earphone jack are arranged on a shell of the equipment body; and as above sound production module, sound production module's vibrating diaphragm setting is in vibrating diaphragm hole department, the moving-iron unit, leading note pipe and the earphone socket of generation module all are located in the shell, the earphone socket set up with the position that the earphone jack corresponds.

Optionally, the sound guide tube connecting hole is disposed on a side of the earphone socket away from the earphone jack.

Optionally, a partition plate is formed on the inner side of the housing, the partition plate and the housing are integrally formed, the partition plate, a part of the housing and the diaphragm together enclose a sound cavity, the moving iron unit is located in the sound cavity, the earphone socket is located outside the sound cavity, the sound guide tube penetrates through the partition plate to connect the moving iron unit and the earphone socket, and a signal line of the electronic device penetrates through the partition plate to be connected with the moving iron unit.

Optionally, the housing includes a bottom plate and a rim formed around the bottom plate, and the diaphragm hole and the earphone jack are disposed on the rim.

In the sound production module of this disclosure, send the high frequency audio through the vibrating diaphragm, send the low frequency audio in order to supplement the low frequency part through leading note pipe and earphone socket for tone quality is more even complete.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic diagram of an electronic device of the present disclosure;

FIG. 2 is a schematic view of the assembly of the sound module of the present disclosure with an electronic device housing;

fig. 3 is a schematic diagram of a sound module of the present disclosure;

figure 4 is an exploded view of a sound module of the present disclosure;

fig. 5 is a cross-sectional view of one embodiment of a moving-iron unit in the sound module of the present disclosure;

FIG. 6 is a functional schematic diagram of a sound module of the present disclosure;

fig. 7 is a frequency response graph of a sound generation module according to a first embodiment of the present disclosure;

fig. 8 is a frequency response graph of a sound module according to a second embodiment of the present disclosure;

fig. 9 is a frequency response graph of a sound module according to a third embodiment of the present disclosure;

fig. 10 is a frequency response graph of a sound module according to a fourth embodiment of the present disclosure;

FIG. 11 is a graph of the frequency response of the sound module of comparative example one;

fig. 12 is a graph of the frequency response of the sound module of the comparative example.

Description of the reference numerals

10 case 11 bottom plate

12 frame 121 diaphragm hole

122 earphone jack 20 sound production module

21 signal line 22 moving iron unit

220 sound outlet hole 221 shielding shell

222 magnet 223 yoke

224 solenoid 225 armature

226 linking member 227 vibrating plate

228 obverse and 229 reverse

23 diaphragm 24 leading sound tube

25 earphone socket 251 sound guide tube connecting hole

28 baffle 30 shield

100 electronic device

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

The present disclosure provides a sound generation module and an electronic device having the same. As shown in fig. 1 to 4, the electronic device 100 includes a device body and a sound emitting module 20. The casing 10 of the apparatus body is provided with a diaphragm hole 121 and an earphone jack 122.

The sound module 20 includes a diaphragm 23, a moving-iron unit 22, a sound-guiding tube 24, and an earphone socket 25. A diaphragm 23 is disposed at the diaphragm hole 121, the center of the diaphragm 23 may be aligned with the center of the diaphragm hole 121, and the edge of the diaphragm 23 may be connected to the case 10. The moving-iron unit 22, the sound-guiding tube 24 and the earphone socket 25 are all located within the housing 10. The signal line 21 of the electronic device is connected to a moving-iron unit 22, and the moving-iron unit 22 is disposed inside the diaphragm 23 and connected to the diaphragm 23. The earphone jack 25 is disposed at a position corresponding to the earphone jack 122 and is connected to the housing 10. The earphone socket 25 is provided with a sound guide tube connection hole 251, one end of the sound guide tube 24 is connected to the sound outlet hole 220 of the moving iron unit 22, and the other end is connected to the sound guide tube connection hole 251 of the earphone socket 25. Here, the earphone socket 25 may be a 3.5 earphone socket or a 4.5 earphone socket, which are well known to those skilled in the art.

The moving iron unit 22 is a nearly closed electromagnetic vibrator, and vibrates according to an input electrical signal, and the vibration state of the electrical signal changes. Since the moving-iron unit 22 is disposed on the diaphragm 23, the moving-iron unit 22 will push the diaphragm 23 to vibrate and generate sound when vibrating. Meanwhile, the moving-iron unit 22 is also a sound-producing device besides a vibrating device, sound is emitted from the sound-emitting hole 220 of the moving-iron unit 22 and is transmitted to the cavity of the earphone socket 25 through the sound-guiding tube 24, and sound is transmitted from the cavity of the earphone socket 25 through the earphone jack 122, so that the earphone jack 122 also serves as a receiver sound-emitting hole.

Because the moving-iron unit 22 is directly arranged on the vibrating diaphragm 23, the area shape proportion of the moving-iron unit 22 and the vibrating diaphragm 23 is limited, and the design can influence the low-frequency effect of sound, the vibrating unit 22 adopted by the invention is the moving-iron unit 22, the moving-iron unit 22 can vibrate and can independently sound, the sound emitted by the moving-iron unit 22 is transmitted out through the sound guide pipe 24 to enhance the bass effect, and just fills the gap of the bass part of the vibrating diaphragm 23, and the composite design can meet the acoustic requirement of the receiver of the electronic equipment and improve the tone quality.

The moving-iron unit is an acoustic device well known to those skilled in the art, and the structure and operation principle thereof will be described only briefly.

As shown in fig. 5, the moving iron unit 22 includes a shield case 221, a magnet 222, a yoke 223, an electromagnetic coil 224, an armature 225, an interlocking member 226, and a vibrating piece 227. One end of the shielding shell 221 is provided with a sound outlet hole 220, the magnets 222 are two permanent magnets with different magnetic poles, the two magnets 222 are fixed on the upper and lower surfaces inside the hollow magnet yoke 223, a gap is left between the two magnets 222, and the hollow magnet yoke 223 is used as a support for fixing the magnets 222. The armature 225 is U-shaped, one side of the U-shape is fixed on the outer side wall of the yoke 223, the free end of the other side of the U-shape passes through the gap between the magnets 222, one end of the linkage part 226 is connected with the free end, the other end of the linkage part 226 is connected with the vibrating piece 227 through welding or gluing, and the electromagnetic coil 224 is wound on one side of the U-shape passing through the magnets 222. The linkage member 226 may take a variety of forms, and is generally of a post-type construction.

In operation, an alternating current signal is transmitted to the electromagnetic coil 224, a magnetic field generated by the electromagnetic coil 224 is transmitted to the armature 225, so that the armature 225 is polarized, the armature 225 vibrates in a gap between the magnets 222 under the action of magnetic force along with the change of the magnetic pole of the armature 225 and the change of the magnetic field strength, the vibration is transmitted to the vibrating plate 227 through the linkage part 226, and the vibrating plate 227 blows the surrounding air to transmit sound through the sound outlet hole 220.

In order to generate a better vibration effect of the diaphragm 23, the front surface 228 of the moving iron unit 22 is preferably adhered to the diaphragm 23. Herein, the "front surface of the moving-iron unit" refers to an outer surface of the shield case 221 on a side opposite to the vibration plate 227 and close to the vibration plate 227. In other possible embodiments, the reverse side 229 of the moving-iron unit 22 may be adhered to the diaphragm 23. Herein, the "reverse side of the moving-iron unit" refers to an outer surface of the shield case 221 on a side opposite to the vibration plate 227 and away from the vibration plate 227.

In the present disclosure, the moving iron unit 22 has two functions, namely, driving the vibrating diaphragm 23 to vibrate and generate sound, and transmitting the sound generated by itself through the sound guiding tube 24 to enhance the bass effect. The moving iron unit 22 is preferably a low-frequency moving iron unit, and can also be a medium-low frequency or medium-frequency moving iron unit.

In order to make the vibration of each point on the diaphragm 23 more uniform, so that the sound wave can be uniformly diffused all around, in one embodiment, as shown in fig. 3, the moving iron unit 22 may be adhered to the center of the diaphragm 23.

In order to improve the sound quality of the sound generated by the diaphragm 23, the diaphragm 23 and the moving iron unit 22 may be preferably designed according to the following dimensional parameters, that is, the length of the diaphragm 23 is 15-20mm, the width is 5-10mm, and the thickness is 0.3-0.8 mm; the length of the moving iron unit 22 is 7-10mm, the width is 3-5mm, and the thickness is 1-3 mm.

In order to make the diaphragm 23 durable and not easily damaged, the diaphragm 23 may be made of a composite material. It is preferable to use a composite material of Polyamide (PA), copper foil and bulletproof cloth, and a composite material of polypropylene (PP) and glass fiber, a composite material of rubber and aluminum-magnesium alloy, a composite material of carbon fiber and glass fiber, paper, etc., which are not limited in the present disclosure. So adopt above-mentioned combined material, firstly in order to guarantee that the rigidity and the elastic modulus of vibrating diaphragm 23 accord with the requirement of conventional vibrating diaphragm and then guarantee tone quality, secondly in order to guarantee the anti tearing intensity of vibrating diaphragm 23, make vibrating diaphragm 23 can not damaged by external force easily.

The elements of the sound module may be connected by any suitable connection method, such as screwing, bonding, ultrasonic welding, heat melting, and the like, which is not limited by the disclosure. In one embodiment, the moving-iron unit 22 is adhered to the diaphragm 23, one end of the sound guide tube 24 is inserted into the sound outlet hole 220 of the moving-iron unit 22 and adhered with glue, and the other end of the sound guide tube 24 is inserted into the sound guide tube connection hole 251 of the earphone socket 25 and adhered with glue.

In order to reduce the length of the sound guide tube 24, save the arrangement space, and avoid the problem of great sound attenuation caused by the sound guide tube 24 being too long, it is preferable that the sound outlet hole 220 of the moving-iron unit 22 be disposed toward the earphone socket 25, as shown in fig. 3. The length of the sound-guiding duct 24 is preferably 20-30 mm.

In order to transmit sound waves smoothly in the sound guide tube 24, as shown in fig. 3, the path of the sound guide tube 24 should be as smooth as possible to avoid right angles or loops.

In order to transmit sound waves smoothly inside the sound guide tube 24, it is preferable that the inner circumference of the sound guide tube 24 is circular in cross section. However, the present disclosure is not limited thereto, and the inner circumferential cross-section of the sound guide tube 24 may also be other shapes, such as a square, a triangle, and the like. Preferably, the inner and outer circumferential cross-sections of the sound guide tube 24 are circular, and the inner diameter of the sound guide tube 24 is 1-2mm and the outer diameter is 2-3 mm.

In the present disclosure, by providing the sound guide tube 24, the lower limit of the low frequency can be raised, the low frequency effect can be enhanced, and the loudness can be enhanced. The sound guide tube 24 may be made of polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS), or aluminum, titanium, beryllium, or other metal materials.

In one embodiment, as shown in fig. 2, a partition 28 is formed inside the housing 10, the partition 28 is integrally formed with the housing 10, the partition 28 and a portion of the housing 10 and the diaphragm 23 together define a sound cavity, the moving-iron unit 22 is located in the sound cavity, the earphone socket 25 is located outside the sound cavity, the sound guide tube 24 passes through the partition 28 to connect the moving-iron unit 22 and the earphone socket 25, and the signal line 21 of the electronic device 100 passes through the partition 28 to connect the moving-iron unit 22. By forming the acoustic chamber as described above, it is possible to concentrate the vibration wave toward the diaphragm 23 on the one hand, and to increase the bass effect on the other hand.

The diaphragm aperture 121 and the earphone jack 122 may be disposed at any suitable location on the housing 10, and the present disclosure is not limited thereto. In one embodiment, as shown in fig. 2, the housing 10 includes a bottom plate 11 and a rim 12 formed around the bottom plate 11, and the diaphragm hole 121 and the earphone jack 122 are disposed on the rim 12. Further, the frame 12 may include an upper frame 12, a lower frame 12, a left frame 12 and a right frame 12, and the diaphragm hole 121 and the earphone jack 122 may be disposed on the upper frame 12 for better ergonomics.

Through directly arranging vibrating diaphragm 23 on frame 12 for vibrating diaphragm 23 can have frame 12 and two kinds of functions of earphone diaphragm concurrently, and can save earphone phonate hole and earphone dust screen on frame 12, and sound directly sends from frame 12 surface. Moreover, by moving the position of the receiver away from the screen of the electronic device, the screen maximization can be realized under the condition that the electronic device keeps a certain volume, and convenience and better experience are provided for users.

The electronic device 100 of the present disclosure may be a mobile phone, or may be a device that needs to generate sound, such as a tablet computer, a sound box, an electric toy, and the like, which is not limited by the present disclosure.

The following explains the sound production effect of the sound production module of the present disclosure through experimental data.

The test environment for the experimental data was an acoustic anechoic chamber and the test equipment was CMU200, ACQUA system, and 3.3 dummy heads. The CMU200 is an analog base station, and is used for audio test of electronic devices, and is used for realizing wireless connection with the electronic devices, performing voice coding and decoding modulation, and establishing a call state. The ACQUA system is used for analyzing and testing call audio signals. 3.3 the artificial head is used for simulating the state of a human during conversation.

The test process is as follows: and establishing a call state between the electronic equipment and the CMU by using the special test white card for the CMU200, and analyzing data by using the ACQUA system and the matched software thereof to obtain a corresponding test result.

Fig. 7 is a frequency response graph of a sound generation module according to a first embodiment of the present disclosure. In this embodiment, the sound emitting module includes a moving-iron unit 22, a sound-guiding tube 24, an earphone socket 25, and a diaphragm 23, and the inner circumference of the sound-guiding tube 24 has a circular cross section, the length of the sound-guiding tube 24 is within the above-mentioned preferred range, and no right angle or loop occurs in the path of the sound-guiding tube 24.

Fig. 8 is a frequency response graph of a sound generation module according to a second embodiment of the present disclosure. In this embodiment, the sound generating module includes a moving-iron unit 22, a sound guide tube 24, an earphone socket 25, and a diaphragm 23, and the inner peripheral cross-section of the sound guide tube 24 is square, the length of the sound guide tube 24 is within the above-mentioned preferred range, and no right angle or loop appears on the path of the sound guide tube 24

Fig. 9 is a frequency response graph of a sound module according to a third embodiment of the present disclosure. In this embodiment, the sound generating module includes a moving-iron unit 22, a sound guide tube 24, an earphone socket 25, and a diaphragm 23, and the inner circumference of the sound guide tube 24 has a circular cross-section, the length of the sound guide tube 24 is 100mm, and no right angle or loop occurs on the path of the sound guide tube 24.

Fig. 10 is a frequency response graph of a sound module according to a fourth embodiment of the present disclosure. In this embodiment, the sound emitting module includes a moving-iron unit 22, a sound-guiding tube 24, an earphone socket 25, and a diaphragm 23, and the inner circumference of the sound-guiding tube 24 has a circular cross section, the length of the sound-guiding tube 24 is within the above-mentioned preferred range, and a right angle and a loop are present on the path of the sound-guiding tube 24.

Fig. 11 is a graph of the frequency response of the sound module of the comparative example. In this comparative example, the sound module includes only the moving-iron unit 22 and the diaphragm 23, and does not include the sound guide tube 24 and the earphone socket 25.

Fig. 12 is a graph of the frequency response of the sound module of the comparative example. In this comparative example, the sound module includes only the moving-iron unit 22, the sound-guiding duct 24, and the earphone socket 25, and does not include the diaphragm 23.

In each figure, the region of the test curve between the upper limit and the lower limit is an ideal audio curve, and high-quality sound can be played; if the test curve exceeds the upper limit or falls below the lower limit, the non-ideal audio curve will produce a sound with flaws. The closer the non-ideal audio curve is to the region between the upper and lower limits, the fewer flaws in the sound are played and vice versa the more flaws. Among them, in comparative example one and comparative example two, since the sound loudness was too small, the upper limit and the lower limit could not be displayed.

From the experimental data of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the first comparative example and the second comparative example, it can be seen that the first embodiment is superior to the second embodiment, the third embodiment and the fourth embodiment, and the second embodiment, the third embodiment and the fourth embodiment are superior to the first comparative example and the second comparative example in terms of sound effect.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides a sound production module, its characterized in that, includes vibrating diaphragm (23), moves indisputable unit (22), leading note pipe (24) and earphone socket (25), move indisputable unit (22) and connect in one side of vibrating diaphragm (23), be provided with leading note pipe connecting hole (251) on earphone socket (25), the one end of leading note pipe (24) with move out sound hole (220) of indisputable unit (22) and link to each other, the other end with leading note pipe connecting hole (251) of earphone socket (25) link to each other.

2. The sound generating module of claim 1, wherein the diaphragm (23) is made of a composite material.

3. The sound generating module according to claim 1, wherein the moving-iron unit (22) is adhered to the diaphragm (23).

4. The sound generating module according to claim 3, wherein the front surface of the moving-iron unit (22) is adhered to the diaphragm (23).

5. The sound production module of claim 3, wherein the moving iron unit (22) is adhered to the center of the diaphragm (23).

6. The sound emitting module of claim 1, wherein the sound emitting hole (220) of the moving-iron unit (22) is disposed toward the earphone socket (25).

7. The sound generating module of claim 1, wherein the diaphragm (23) has a length of 15-20mm, a width of 5-10mm and a thickness of 0.3-0.8 mm.

8. The sound generating module according to claim 1, wherein the moving-iron unit (22) has a length of 7-10mm, a width of 3-5mm and a thickness of 1-3 mm.

9. The sound generating module according to claim 1, wherein the sound guiding tube (24) has a length of 20-30mm, an inner diameter of 1-2mm and an outer diameter of 2-3 mm.

10. An electronic device, comprising:

the earphone comprises an equipment body, wherein a diaphragm hole (121) and an earphone jack (122) are formed in a shell (10) of the equipment body; and

the sound generating module according to any one of claims 1-9, wherein a diaphragm (23) of the sound generating module is disposed at the diaphragm hole (121), and a moving-iron unit (22), a sound guide tube (24), and an earphone socket (25) of the sound generating module are all located within the housing (10), the earphone socket (25) being disposed at a position corresponding to the earphone jack (122).

11. An electronic device as claimed in claim 10, characterized in that the sound guide tube connection opening (251) is provided on a side of the earphone socket (25) facing away from the earphone jack (122).

12. The electronic device according to claim 10, wherein a partition plate (28) is formed inside the housing (10), the partition plate (28) is integrally formed with the housing (10), the partition plate (28), a part of the housing (10), and the diaphragm (23) jointly enclose a sound cavity, the moving-iron unit (22) is located in the sound cavity, the earphone socket (25) is located outside the sound cavity, the sound guide tube (24) penetrates through the partition plate (28) to connect the moving-iron unit (22) and the earphone socket (25), and a signal line (21) of the electronic device penetrates through the partition plate (28) to connect the moving-iron unit (22).

13. The electronic device according to claim 10, wherein the housing (10) includes a base plate (11) and a rim (12) formed around the base plate (11), and the diaphragm hole (121) and the earphone jack (122) are provided on the rim (12).