CN106162461B

CN106162461B - Loudspeaker module

Info

Publication number: CN106162461B
Application number: CN201610675924.0A
Authority: CN
Inventors: 蒋国珠; 邓旭东; 邱诚; 季顺国
Original assignee: Jiangxi Lianchuang Sound Macro Electronic Co ltd
Current assignee: Jiangxi Lianchuang Sound Macro Electronic Co ltd
Priority date: 2016-08-17
Filing date: 2016-08-17
Publication date: 2021-09-07
Anticipated expiration: 2036-08-17
Also published as: CN106162461A

Abstract

The invention provides a loudspeaker module, which comprises a lower shell, a loudspeaker unit arranged in the lower shell, an upper shell connected with the lower shell and a special sound guide body arranged on the outer side surface of the upper shell, wherein a front cavity of the loudspeaker unit is formed between the top of the loudspeaker unit and the upper shell, two sides of the loudspeaker unit are respectively formed with a rear cavity of the loudspeaker unit between the upper shell and the lower shell, the special sound guide body comprises a sound guide channel, two sound guide pipelines arranged on two sides of the sound guide channel and a cavity communicated with the two sound guide pipelines, the sound guide channel is communicated with the front cavity, and each sound guide pipeline is correspondingly communicated with one rear cavity. According to the loudspeaker module, the two rear cavities are communicated with the cavity, so that the rear cavity of the loudspeaker unit is enlarged, the tone quality of the loudspeaker module is improved, and the sound impedance is reduced by half.

Description

Loudspeaker module

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a loudspeaker module.

Background

With the background of rapid development of electronic technology, portable electronic devices for mobile communication are moving toward being light and thin. Take large-screen mobile phones, tablets and notebooks as examples, the products are required to be thin enough, and the screens are large enough to meet the use requirements of people. Accordingly, the thickness of the speaker module which can be installed becomes thinner and thinner, and the sound emitted by the speaker module can only be emitted from the side surface or the back surface of the mobile phone because most of the space on the front surface of the mobile phone is occupied by the screen.

In the prior art, the sound emitting structure of the currently used speaker module mainly includes a normal sound emitting structure and a side sound emitting structure. The vibrating diaphragm of the loudspeaker module with the sound-emitting structure directly faces the sound-emitting port of the mobile phone, and the sound-emitting area occupied by the vibrating diaphragm is large, so that the sound can be emitted only from the back, and when people enjoy videos, the sound emitted by the videos can reach the ears only by being diffracted by 180 degrees, so that the medium-high frequency sound quality heard by the people is poor. The loudspeaker module with the side sound-emitting structure can emit sound from the side face of the mobile phone, which is a main trend of the current smart mobile phones. However, when people enjoy video, the sound produced by the audio amplifier is still 90 degrees to the ears of the listeners, which still affects people's enjoyment of high-frequency music with strong directivity. Moreover, the speaker module that uses at present is more and more littleer, and the back chamber that can lead to speaker unit like this is less, seriously influences speaker unit's low frequency dive to lead to the sound that speaker module sent to sharp and sound resolution variation, seriously influence speaker module's tone quality.

Disclosure of Invention

Accordingly, it is an object of the present invention to provide a speaker module which improves sound quality by enlarging a rear chamber.

The utility model provides a loudspeaker module, includes the casing down, installs the inside speaker unit of casing down, with last casing that casing block connects down and installing go up the special sound guide body on the outside side surface of casing, the top of speaker unit with form between the last casing the ante-chamber of speaker unit, the both sides of speaker unit respectively with go up the casing with form one down between the casing the back chamber of speaker unit, the special sound guide body is including leading the sound passageway, locating lead two of sound passageway both sides lead the sound pipeline and with two lead the cavity of sound pipeline intercommunication, lead the sound passageway with ante-chamber intercommunication, every lead the sound pipeline correspond with one the back chamber intercommunication.

Above-mentioned speaker module, because two that set up on the special sound conductor lead the sound pipeline respectively with two the back cavity intercommunication, and two lead the sound pipeline all with the cavity intercommunication makes the back cavity with the cavity intercommunication, thereby has increased under the condition of not increasing speaker module's volume the back cavity of speaker, and then improved speaker module's tone quality, simultaneously, every lead the sound pipeline and every the back cavity all is an independent structure, when two lead the sound pipeline respectively with two during the back cavity intercommunication, will form a pair of parallelly connected sound conduction structure, for a sound conduction structure, two sound conduction structures can make sound impedance reduce half, avoid effectively speaker module's frequency response curve forms the risk of intermediate frequency valley.

Furthermore, the upper shell comprises a first side surface connected with the special sound guide body, an upper shell sound outlet hole and two rear cavity circulation holes arranged on two sides of the upper shell sound outlet hole are formed in the first side surface, the sound guide channel is communicated with the front cavity through the upper shell sound outlet hole, and each sound guide pipeline is correspondingly communicated with the corresponding rear cavity through one rear cavity circulation hole.

Further, the special sound guide body comprises a second side surface connected with the first side surface, the second side surface and the first side surface are both inclined structures, and the first side surface and the second side surface are completely attached.

Furthermore, the first side surface is connected with the second side surface through double-sided back adhesive foam, and the size and the shape of the double-sided back adhesive foam correspond to those of the first side surface.

Furthermore, the sound guide channel is a through hole structure formed by connecting two holes which form an angle of 90 degrees with each other.

Furthermore, the bottom of casing is equipped with first through-hole down, the shape of first through-hole is "protruding" font, the top edge periphery of first through-hole is equipped with annular supporting part, the bottom joint of speaker unit is in on the supporting part.

Furthermore, the top of the upper shell is provided with a square groove, a second through hole positioned at the bottom of the square groove and a steel sheet inserted in the square groove, and the second through hole is opposite to the loudspeaker unit.

Further, the steel sheet is of a square structure, a plurality of first inserting portions which are inclined downwards are arranged on any three sides of the steel sheet respectively, a plurality of second inserting portions which are inclined upwards are arranged on the other side of the steel sheet, two third inserting portions are further arranged on one side of any three sides, and each third inserting portion comprises a connecting portion which is connected with the steel sheet and is inclined downwards and a straight portion which is connected with the connecting portion.

Further, all of the first insertion portions, the second insertion portions, and the connection portions are inclined outward, and each of the third insertion portions is longer than all of the first insertion portions and the second insertion portions.

Furthermore, the outside of cavity is equipped with the recess that both ends are the through state, the arbitrary one end of recess is equipped with the breach of stairstepping.

Drawings

Fig. 1 is an exploded perspective view of a speaker module according to a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a speaker module according to a first embodiment of the invention.

Fig. 3 is a schematic perspective view of a special sound conductor according to a first embodiment of the present invention.

Fig. 4 is a schematic perspective view of another direction of the special sound conductor in the first embodiment of the present invention.

Fig. 5 is a schematic perspective view of an upper housing according to a first embodiment of the present invention.

FIG. 6 is a perspective view of a steel sheet according to a first embodiment of the present invention.

Description of the main elements

Lower casing	10	Speaker unit	20
				Upper shell	30	Double-sided adhesive-backed foam	40
Special sound conductor	50	First through hole	11
				Square groove	31	Second through hole	32
Steel sheet	33	Clamping groove	321
				First insertion part	331	Second insertion part	332
Third insertion part	333	First side surface	34
				Upper casing sound outlet	341	Rear cavity flow hole	342
Second side surface	51	Sound conducting channel	52
				Sound conducting pipeline	53	Hollow cavity	54
Groove	55	Gap	551

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, a speaker module according to a first embodiment of the present invention is shown, which includes a lower housing 10, a speaker unit 20, an upper housing 30, a double-sided adhesive-backed foam 40, and a special sound conductor 50.

The bottom of the lower shell 10 is provided with a first through hole 11, the first through hole 11 is in a shape of a Chinese character 'tu', and the periphery of the top edge of the first through hole 11 is provided with an annular supporting part.

Speaker unit 20 locates the inside of casing 10 down, speaker unit 20's bottom joint is in on the supporting part, speaker unit 20 is used for turning into acoustic signal with the signal of telecommunication, speaker unit 20 is the sound generating element of speaker module.

The top of the upper casing 30 is provided with a square groove 31, a second through hole 32 arranged at the bottom of the square groove 31, and a steel sheet 33 inserted into the square groove 31, the bottom of the second through hole 32 is provided with a clamping groove 321, the clamping groove 321 is communicated with the second through hole 32, the upper casing 30 is clamped and connected with the lower casing 10, so that the top of the speaker unit 20 is clamped in the clamping groove 321, and the speaker unit 20 is fixed in an area enclosed by the upper casing 30 and the lower casing 10. When the upper housing 30, the lower housing 10 and the speaker unit 20 are mounted and fixed, the second through hole 32 is sandwiched between the steel sheet 33 and the top of the speaker unit 20, so as to form a cavity structure, the cavity structure is a front cavity of the speaker unit 20, and simultaneously, two sides of the speaker unit 20 respectively form a rear cavity of the speaker unit 20 with the upper housing 30 and the lower housing 10. The steel sheet 33 is of a square structure, a plurality of first inserting portions 331 which are inclined downward are respectively arranged on any three sides of the steel sheet 33, a plurality of second inserting portions 332 which are inclined upward are arranged on the other side of the steel sheet 33, two third inserting portions 333 are further arranged on one side of any three sides, each third inserting portion 333 comprises a connecting portion which is connected with the steel sheet 33 and is inclined downward and a straight portion which is connected with the connecting portion, and each third inserting portion 333 is longer than all the first inserting portions 331 and the second inserting portions 332. All of the first insertion portions 331, the second insertion portions 332, and the connection portions are inclined outward. The bottom edge of the square groove 31 is provided with a plurality of insertion grooves which are matched with the shapes, positions and sizes of the first insertion part 331, the second insertion part 332 and the third insertion part 333 respectively, the thickness of the steel sheet 33 is consistent with the depth of the square groove 31, and the steel sheet 33 is inserted in the square groove 31, so that the upper shell 30 is sealed, and the thickness of the steel sheet 33 can be freely adjusted, so that the space of the front cavity can be freely adjusted, and the design allowance of the loudspeaker module is large. The upper shell 30 further includes a first side surface 34 located outside the upper shell 30, the first side surface 34 is an inclined structure, the first side surface 34 is provided with an upper shell sound outlet 341 and rear cavity circulation holes 342 located at two sides of the upper shell sound outlet 341, the upper shell sound outlet 341 is communicated with the front cavity and is used for guiding the sound waves emitted by the speaker unit 20 in the front cavity to the special sound conductor 50, and each rear cavity circulation hole 342 is correspondingly communicated with one rear cavity and is used for guiding the sound waves emitted by the speaker unit 20 in the rear cavity to the special sound conductor 50.

The double-sided adhesive-backed foam 40 is adhered to the first side surface 34, and the shape and size of the double-sided adhesive-backed foam 40 correspond to the first side surface 34, so that the double-sided adhesive-backed foam 40 can completely cover the non-porous area of the first side surface 34.

The special sound guide body 50 is connected with the upper shell 30 through the double-sided back adhesive foam 40, and the double-sided back adhesive foam 40 is connected, so that on one hand, the special sound guide body 50 is connected with the upper shell 30 without rigid connection, resonance risks are effectively avoided, the mounting stability is improved, on the other hand, the connection process between the special sound guide body and the upper shell is greatly simplified, and the cost is saved. The special sound guiding body 50 comprises a second side surface 51, a sound guiding channel 52 arranged on the second side surface 51, two sound guiding pipes 53 and a cavity 54 communicated with the two sound guiding pipes 53, wherein the two sound guiding pipes 53 are respectively arranged on two sides of the sound guiding channel 52. The second side surface 51 is of an inclined structure, and the inclined direction of the second side surface 51 corresponds to the inclined direction of the first side surface 34, so that the first side surface 34 and the second side surface 51 are completely attached, and the inclined structure can increase the contact area and improve the installation stability. The second side surface 51 is connected to the first side surface 34 by the double-sided adhesive-backed foam 40. The sound guiding channel 52 is a through hole structure formed by connecting two holes which are at 90 degrees with each other, and the sound outlet of the sound guiding channel 52 is located at the top of the special sound guiding body 50 and faces the front surface of the speaker module. The sound guide channel 52 and the upper shell sound outlet 341 have the same opening size, the sound guide channel 52 is communicated with the front cavity through the upper shell sound outlet 341 and is used for sending out the sound wave guided out by the upper shell sound outlet 341, because the sound guide channel 52 is a through hole structure formed by connecting two holes which are 90 degrees with each other, the sound wave sent out by the front cavity is converted to 90 degrees on the special sound guide body 50 and is sent out from the front surface of the loudspeaker module, the problem that the sound sent out by the loudspeaker module adopting the side sound outlet structure is 90 degrees with the ears of a listener in the prior art is solved, meanwhile, the sound outlet mode is more in line with the habit that people tend to face the screen when using the mobile phone, the appreciation of music and video by people is facilitated, and because the sound guide channel 52 adopts the through hole structure formed by connecting two holes which are 90 degrees with each other, the conducting path of the front cavity sound wave is shortened, the front cavity sound wave can be emitted in a short path, and the phenomenon that the high-frequency cut-off is too far ahead due to the fact that the front cavity path is too long is effectively avoided. Each sound guide pipe 53 is correspondingly communicated with the corresponding rear cavity through one rear cavity through hole 342, so that the two rear cavities are communicated with the cavity 54, the rear cavity space of the loudspeaker module is increased, and the opening size of each sound guide pipe 53 is consistent with that of the corresponding rear cavity through hole 342. Each of the back cavities, each of the back cavity through holes 342, and each of the sound guide pipes 53 are independent structures, so that when two back cavities are respectively communicated with the cavity 54 through corresponding channels, a pair of sound guide structures connected in parallel is formed, which is beneficial to reducing sound wave impedance. The outer side of the cavity 54 is provided with a groove 55 with two ends in a through state, any end of the groove 55 is provided with a notch 551 in a stepped shape, and when the loudspeaker module is installed on equipment, the groove 55 and the notch 551 can be clamped with the shell wall of the shell of the equipment, so that the installation stability and the product tightness can be improved.

In summary, in the above embodiment of the present invention, the two sound guiding pipes 53 disposed on the special sound guiding body 50 are respectively communicated with the two rear cavities, and the two sound guiding pipes 53 are both communicated with the cavity 54, so that the two rear cavities are both communicated with the cavity 54, thereby increasing the rear cavity of the speaker unit 20 without increasing the volume of the speaker module, and further improving the sound quality of the speaker module, and meanwhile, when the two rear cavities are respectively communicated with the cavity 54 through corresponding channels, a pair of parallel sound guiding structures is formed. Moreover, the sound guide channel 52 arranged on the special sound guide body 50 can convert the sound wave transmitted from the front cavity by 90 degrees and then transmit the sound wave from the front side of the loudspeaker module, so that the sound output mode is more in line with the habit that people tend to face the screen when using the mobile phone, and the people can enjoy music and videos conveniently, and the sound guide channel 52 shortens the transmission path of the sound wave, so that the phenomenon that the high-frequency cut-off is too far ahead due to the too long path of the front cavity can be effectively avoided.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A speaker module, its characterized in that: the loudspeaker comprises a lower shell, a loudspeaker unit arranged in the lower shell, an upper shell connected with the lower shell in a clamping way, and a special sound guide body arranged on the outer side surface of the upper shell, wherein a front cavity of the loudspeaker unit is formed between the top of the loudspeaker unit and the upper shell, two sides of the loudspeaker unit are respectively formed with a rear cavity of the loudspeaker unit between the upper shell and the lower shell, the special sound guide body comprises a sound guide channel, two sound guide pipelines arranged on two sides of the sound guide channel, and a cavity communicated with the two sound guide pipelines, the sound guide channel is communicated with the front cavity, each sound guide pipeline is correspondingly communicated with one rear cavity, the upper shell comprises a first side surface connected with the special sound guide body, an upper shell sound outlet hole and two rear cavity circulation holes arranged on two sides of the upper shell sound outlet hole are arranged on the first side surface, the utility model discloses a sound guide channel, including sound guide channel, front chamber, sound outlet hole, sound guide channel, sound guide channel, and sound guide channel, sound guide channel, sound channel, and sound guide channel, and sound guide channel, sound guide channel, sound channel.

2. The speaker module of claim 1, wherein: the special sound conductor comprises a second side surface connected with the first side surface, the second side surface and the first side surface are both inclined structures, and the first side surface and the second side surface are completely attached.

3. The speaker module as claimed in claim 2, wherein: the first side surface is connected with the second side surface through double-sided back adhesive foam, and the size and the shape of the double-sided back adhesive foam correspond to those of the first side surface.

4. The speaker module of claim 1, wherein: the sound guide channel is a through hole structure formed by connecting two holes which are 90 degrees from each other.

5. The speaker module of claim 1, wherein: the bottom of casing is equipped with first through-hole down, the shape of first through-hole is "protruding" font, the edge periphery at first through-hole top is equipped with annular supporting part, the bottom joint of speaker unit is in on the supporting part.

6. The speaker module of claim 1, wherein: the top of the upper shell is provided with a square groove, a second through hole positioned at the bottom of the square groove and a steel sheet inserted in the square groove, and the second through hole is opposite to the loudspeaker unit.

7. The speaker module as claimed in claim 6, wherein: the steel sheet is of a square structure, a plurality of first inserting portions which are inclined downwards are arranged on any three sides of the steel sheet respectively, a plurality of second inserting portions which are inclined upwards are arranged on the other side of the steel sheet, two third inserting portions are further arranged on one side of any three sides, and each third inserting portion comprises a connecting portion which is connected with the steel sheet and is inclined downwards and a straight portion which is connected with the connecting portion.

8. The speaker module as claimed in claim 7, wherein: all of the first insertion portions, the second insertion portions, and the connection portions are inclined outward, and each of the third insertion portions is longer than all of the first insertion portions and the second insertion portions.

9. The speaker module of claim 1, wherein: the outside of cavity is equipped with the recess that both ends are the through state, the arbitrary one end of recess is equipped with the breach of stairstepping.