CN111031455A - Adjustable loudspeaking system for automobile seat headrest - Google Patents
Adjustable loudspeaking system for automobile seat headrest Download PDFInfo
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- CN111031455A CN111031455A CN201811170940.XA CN201811170940A CN111031455A CN 111031455 A CN111031455 A CN 111031455A CN 201811170940 A CN201811170940 A CN 201811170940A CN 111031455 A CN111031455 A CN 111031455A
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- 238000009434 installation Methods 0.000 claims abstract description 44
- 210000005069 ears Anatomy 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The invention relates to an adjustable loudspeaker system for a headrest of an automobile seat, which is characterized in that: the loudspeaker device comprises an adjustable loudspeaker device, wherein the adjustable loudspeaker device comprises a driving assembly and a deflection assembly, the driving assembly comprises a driving motor, the mounting body can elastically contract or expand under the driving of the driving assembly, the deflection assembly comprises a deflection motor, and the mounting body can swing under the driving of the deflection assembly; the ultrasonic sensor is installed on the installation body, the output end of the ultrasonic sensor is connected with the analog-to-digital input end of the A/D converter, the digital-to-electric output end of the A/D converter is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the signal input end of the processor, the first output end of the processor is connected with the driving motor, and the second output end of the processor is connected with the deflection motor. The invention has the beneficial effects that the auditory effect of drivers can be improved while the privacy conversation is achieved.
Description
Technical Field
The invention belongs to the field of automobile accessories, and particularly relates to an adjustable loudspeaker system for an automobile seat headrest.
Background
With the rapid development of the automobile industry, the requirements of consumers for functional accessories of automobiles are higher and higher.
The loudspeaker is a necessary device on the automobile, not only has the function of voice communication, but also has the entertainment functions of listening to music and the like, and the requirements of drivers on the automobile on the tone quality are high, so that the requirements on the tone quality are high, the drivers need to be clear and smooth, and the best hearing effect needs to be obtained.
The conventional speaker is generally installed in a fixed connection manner in a car, so that the privacy effect is not achieved. At present, a private automobile loudspeaker is arranged at the position of an automobile headrest, and only a person on the seat can hear voice. However, the speaker has the following disadvantages: the direction of sound transmission and the range of sound transmission of the loudspeaker are always fixed, and actually, the head of a driver on a vehicle is movable, and the ear position is not fixed, so that the driver is possibly not in the optimal position for receiving the sound of the loudspeaker, and the optimal hearing effect is not achieved.
Disclosure of Invention
Aiming at the defect that the traditional loudspeaker cannot achieve the privacy and auditory effect and simultaneously has the advantages that the device can carry out corresponding state adjustment on the loudspeaker according to the detected position of the ear of a person, so that the privacy conversation and the auditory effect are optimal.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a speaker system with adjustable be used for car seat headrest which characterized in that: the adjustable loudspeaker device comprises an installation plate, wherein an installation body made of elastic materials is fixedly supported on one side of the installation plate through an installation column, and a loudspeaker is arranged on the installation body;
the adjustable loudspeaker device also comprises a driving assembly and a deflection assembly, wherein the driving assembly comprises a driving motor, the mounting body can elastically contract or expand under the driving of the driving assembly, the deflection assembly comprises a deflection motor, and the mounting body can swing under the driving of the deflection assembly;
the installation body is further provided with an ultrasonic sensor, the output end of the ultrasonic sensor is connected with the input end of a filter circuit, the output end of the filter circuit is connected with the analog-to-digital input end of an A/D converter, the digital-to-electric output end of the A/D converter is connected with the signal input end of a processor, the first output end of the processor is connected with the driving motor, and the second output end of the processor is connected with the deflection motor.
Adopt above-mentioned scheme, adjustable speaker installs in the headrest both sides, and when ultrasonic sensor detected that passenger's head position changes, will change position and distance and pass to the treater, and treater control beat motor and driving motor adjust adjustable speaker's state through beat subassembly and driving assembly, change adjustable speaker's best sound receiving position to reach the combination of privacy and best hearing effect simultaneously.
Further, the installation body comprises a base plate in a spherical cambered surface structure and arc plates distributed along the circumferential direction of the base plate in an annular array, each arc plate extends outwards along the radial direction from the outer edge of the base plate, and the loudspeakers are distributed on the inner surfaces of the spherical cambered surfaces of the base plate and the arc plates;
the driving assembly is installed on one side of the installation plate, the driving assembly is arranged on the outer surface of the spherical cambered surface of the installation body, and the deflection assembly is arranged on the other side of the installation plate.
Adopt above-mentioned scheme, the speaker distributes on base plate and arc to the installation body has elasticity, and when the position of sitting of the personnel of driving changes, under drive assembly's effect, the installation body outwards expands or inwards contracts, and the convergent point of speaker sound propagation direction moves on the central line of installation body, in order to reach the best receiving position adjustable effect of sound.
Preferably, at least four ultrasonic sensors are mounted on the base plate of the mounting body, and each ultrasonic sensor is used for detecting the distance between the human ears.
Further, four ultrasonic sensors are distributed on the side of the arc concave surface of the base plate in a square shape, the distances between the four ultrasonic sensors and the center point of the base plate are consistent, and the square surface is used as a reference surface for deflection adjustment of the adjustable loudspeaker device.
By adopting the scheme, in order to simplify the calculation processing and neglect the spatial fall, the four ultrasonic sensors and the central point of the base plate can be merged into the same plane for processing. Connecting lines among the installation positions of the four ultrasonic sensors form a square surface as a reference surface, because the distances of human ears detected by each ultrasonic sensor are different, the processor controls the adjustable loudspeaker to rotate, the average value of the distances of two far sides is d1, the average value of the distances of two near sides is d2, when the difference value between d1 and d2 is less than or equal to 0.5cm, the adjustable loudspeaker stops rotating, and the position projected by the human ears onto the reference surface is the center position of the reference surface. If the difference is greater than 0.5cm, the deflection assembly drives the adjustable loudspeaker device to rotate, and if the difference between d1 and d2 is greater than 0.5cm after 1 rotation, the rotation is stopped.
Further, a driving calculation module for calculating an adjustment amount of a driving module of the adjustable speaker is disposed in the processor, and a driving formula is stored in the driving calculation module, where an expression of the driving formula is:
wherein, DeltaY is the stepping amount of the driving motor, DeltaX is the deformation amount of the arc-shaped plate, m is the arc length of the arc-shaped plate on the mounting body, and l0Is the acoustic focal distance in the original state of the mounting body,/1The distance between the ears detected by the ultrasonic sensor after the adjustable loudspeaker deflects and is adjusted.
By adopting the scheme, the arc length of the arc-shaped plate on the mounting body is known, the sound wave junction points of all the loudspeakers on the adjustable loudspeaker device are found out, the distance from each loudspeaker to the junction point is equal, the distance from all the loudspeakers on the adjustable loudspeaker device to the junction point is equal to the distance from the human ear detected by ultrasonic waves after the deflection adjustment is finished, and therefore the deformation quantity of the arc-shaped plate is calculated. In the scheme, the push ring is arranged in the middle of the arc-shaped plate, so that the stepping quantity delta Y of the driving motor is half of the deformation quantity delta X of the arc-shaped plate.
Further, the deflection assembly comprises a mounting shell, a rotating platform with a central hole is rotatably mounted on the bottom of the mounting shell, and a ball seat fixedly connected to the mounting shell, wherein the ball seat is located inside the central hole, and the rotating platform is further provided with a first inclined surface at one end far away from the mounting shell;
one side of the mounting plate is provided with a ball head rod connected with a ball head of the ball seat and a guide boss matched with the rotating table, wherein the guide boss is provided with a second inclined surface in sliding abutting joint with the first inclined surface; and a power mechanism for driving the rotating table to rotate is also arranged in the mounting shell.
By adopting the scheme, the power mechanism drives the rotating table to rotate, and the rotating table and the guide boss are in sliding fit through the first inclined plane and the second inclined plane, and the ball head rod is connected to the ball seat in a spherical hinge mode, so that when the rotating table rotates, the guide boss can float along with the rotation of the rotating table, and the installation body on the installation plate swings to further realize the deflection of the loudspeaker.
Preferably, the power mechanism comprises a first worm wheel and a first worm which are meshed with each other, wherein the first worm wheel is sleeved on the rotating table, and one end of the first worm is connected with the deflection motor.
Preferably, the rotating table is provided with a notch at one end abutting against the guide boss.
Further, the driving assembly comprises a push ring abutted with the arc-shaped plate and a driving mechanism used for pushing the push ring to move along the central line direction of the installation body;
threaded sleeves are symmetrically arranged on two sides of the push ring; the driving mechanism comprises a gear box arranged on the mounting plate, and a screw rod with one end installed in the gear box and the other end in threaded fit with the threaded sleeve, wherein a second turbine and a second worm which are meshed with each other are arranged in the gear box, the second turbine is sleeved on the screw rod, and the second worm is connected with one end, away from the end meshed with the second turbine, of the second worm to drive the motor.
By adopting the scheme, the installation body is elastic, and the contraction or expansion of the installation body can be controlled by the advancing or retreating of the push ring, so that the distance of the sound intersection point of the loudspeaker on the installation body can be adjusted.
Preferably, the thread sleeves are provided with mounting parts at one ends close to the push rings and are sleeved on the push rings through the mounting parts.
Has the advantages that: compared with the prior art, the adjustable loudspeaker device is adopted, the position change of the ears of a person is detected in real time, and the direction of sound transmission and the spread range are controllably adjusted, so that the optimal sound receiving position is adjusted, the hearing effect of drivers can be improved on the basis of privacy conversation, and the hearing experience of users is improved.
Drawings
Fig. 1 is an overall structure diagram of an adjustable speaker device;
FIG. 2 is a block diagram of the control system of the present invention;
fig. 3 is a cross-sectional view of an adjustable speaker device;
FIG. 4 is a schematic diagram of a partial structure of the deflection assembly;
FIG. 5 is a schematic structural view of the mounting body and the mounting post;
FIG. 6 is a schematic diagram of the change of the sound convergence point on the center line;
FIG. 7 is an auxiliary schematic of the derivation of the drive algorithm;
fig. 8 is a diagram showing the projected positions of the human ears on the reference plane before and after yaw adjustment.
Detailed Description
The invention is further illustrated by the following examples and figures:
as shown in fig. 1, an adjustable speaker system for a headrest of a car seat is characterized in that: the adjustable loudspeaker comprises a mounting plate 3, wherein a mounting body 1 made of elastic materials is fixedly supported on one side of the mounting plate 3 through a mounting column 4, a loudspeaker 2 is arranged on the mounting body 1, the mounting body 1 comprises a base plate 1c in a spherical cambered surface structure and arc plates 1d distributed along the circumferential annular array of the base plate 1c, each arc plate 1d extends outwards along the radial direction from the outer edge of the base plate 1c, and the loudspeaker 2 is distributed on the inner surfaces of the spherical cambered surfaces of the base plate 1c and the arc plates 1 d; drive assembly A installs one side of mounting panel 3, and drive assembly A establishes on the spherical cambered surface of the installation body 1, the installation body 1 can be elastic contraction or open under drive assembly A drives, beat subassembly B establishes 3 opposite sides of mounting panel, the installation body 1 can swing under beat subassembly B's drive. At least four ultrasonic sensors 22 are installed on the base plate 1c of the installation body 1, and each ultrasonic sensor 22 is used for detecting the distance between the human ears.
In this embodiment, as shown in fig. 8, the four ultrasonic sensors are distributed in a square shape on the side of the arc concave surface of the base plate, the distances between the four ultrasonic sensors and the center point of the base plate are the same, and the square surface is used as a reference surface for deflection adjustment of the adjustable speaker. And the four ultrasonic sensors and the central point of the base plate are merged into the same plane for processing.
As shown in fig. 2, the driving assembly a includes a driving motor 6D, the deflection assembly B includes a deflection motor 12c, the mounting body 1 is further mounted with an ultrasonic sensor 22, an output end of the ultrasonic sensor 22 is connected to an input end of a filter circuit, an output end of the filter circuit is connected to an analog electrical input end of an a/D converter, a digital electrical output end of the a/D converter is connected to a signal input end of a processor, a first output end of the processor is connected to the driving motor, and a second output end of the processor is connected to the deflection motor.
Preferably, the processor, the A/D converter and the filter circuit are integrated on the same mainboard and are installed inside the automobile headrest; the types and specific circuit structures of the processor, the a/D converter and the filter circuit in this patent are all prior art, and are not described herein again.
In this embodiment, a driving calculation module for calculating an adjustment amount of a driving module of the adjustable speaker device is disposed in the processor, and a driving formula is stored in the driving calculation module, where an expression of the driving formula is:
as shown in fig. 7, Δ Y is the stepping amount of the driving motor, Δ X is the deformation amount of the arc-shaped plate 1d, m is the arc length of the arc-shaped plate 1d on the installation body 1, and l0Is the acoustic focal distance in the original state of the mounting body 1,/1The ear distance detected by the rear ultrasonic sensor 22 is adjusted for adjustable speaker deflection.
As shown in fig. 3 and 4, the yawing assembly B includes a mounting housing 8, a rotating table 9 having a central hole 9a and a ball seat 8a fixedly connected to the mounting housing 8 are rotatably mounted on a bottom of the mounting housing 8, wherein the ball seat 8a is located inside the central hole 9a, the rotating table 9 further has a first inclined surface 9B at an end far away from the mounting housing 8, a ball rod 10 connected to a ball of the ball seat 8a and a guiding boss 11 engaged with the rotating table 9 are disposed on one side of the mounting plate 3, wherein the guiding boss 11 has a second inclined surface 11a slidably abutted to the first inclined surface 9B, and a power mechanism 12 for driving the rotating table 9 to rotate is further disposed in the mounting housing 8. The power mechanism 12 comprises a first worm wheel 12a and a first worm 12b which are meshed with each other, wherein the first worm wheel 12a is sleeved on the rotating table 9, and one end of the first worm 12b is connected with the deflection motor 12 c. As shown in fig. 6, the forward and reverse rotation of the rotation table 9 can be controlled by the forward and reverse rotation of the deflection motor 12c, so that the deflection of the installation body 1 in the direction of the center line can be realized.
In this embodiment, in order to facilitate the installation of the device of the present invention in the seat headrest, the edge of the bottom side of the installation casing 8 is provided with an outwardly extending extension plate 8b, and positioning holes 8c are distributed on the extension plate 8 b.
Preferably, as shown in fig. 3 and 4, a notch 9c is distributed at one end of the rotating table 9 abutting against the guide boss 11. In order to reduce the relative friction between the first inclined surface 9B and the second inclined surface 11a and improve the motion stability of the swing arm assembly B, a notch 9c is distributed at one end, abutted to the guide boss 11, of the rotating table 9.
As shown in fig. 1 and 5, the driving assembly a includes a push ring 5 abutting against the arc-shaped plate 1d, and a driving mechanism 6 for pushing the push ring 5 to move along the central line direction of the installation body 1; threaded sleeves 2a are symmetrically arranged on two sides of the push ring 5; the driving mechanism 6 comprises a gear box 6a arranged on the mounting plate 3 and a screw rod 6b, one end of the screw rod is arranged in the gear box 6a, the other end of the screw rod is in threaded fit with the threaded sleeve 2a, a second turbine and a second worm which are meshed with each other are arranged in the gear box 6a, the second turbine is sleeved on the screw rod 6b, and one end, meshed with the second turbine, of the second worm is far away from the second worm and is connected with a driving motor 6 d.
As shown in fig. 5, the threaded sleeves 2a are provided with mounting portions 2c at one ends thereof close to the push ring 5, and are sleeved on the push ring 5 through the mounting portions 2 c.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a speaker system with adjustable be used for car seat headrest which characterized in that: the adjustable loudspeaker comprises an adjustable loudspeaker arranged in a headrest of an automobile seat, wherein the adjustable loudspeaker comprises a mounting plate (3), one side of the mounting plate (3) is fixedly supported with a mounting body (1) made of elastic materials through a mounting column (4), and the mounting body (1) is provided with a loudspeaker (2);
the adjustable loudspeaker device further comprises a driving assembly (A) and a deflection assembly (B), the driving assembly (A) comprises a driving motor (6d), the installation body (1) can elastically contract or expand under the driving of the driving assembly (A), the deflection assembly (B) comprises a deflection motor (12c), and the installation body (1) can swing under the driving of the deflection assembly (B);
still install ultrasonic sensor (22) on installation body (1), the input of filter circuit is connected to the output of this ultrasonic sensor (22), the analog-to-digital input end of AD converter is connected to the output of filter circuit, the number electric output end of AD converter connects the signal input part of treater, the first output of treater is connected driving motor, the second output of treater is connected deflection motor.
2. The adjustable acoustic speaker system for an automotive seat headrest according to claim 1, characterized in that: the mounting body (1) comprises a base plate (1c) in a spherical cambered surface structure and arc plates (1d) distributed along the base plate (1c) in a circumferential annular array manner, each arc plate (1d) extends outwards along the radial direction from the outer edge of the base plate (1c), and the loudspeakers (2) are distributed on the inner surfaces of spherical cambered surfaces of the base plate (1c) and the arc plates (1 d);
drive assembly (A) is installed one side of mounting panel (3), and drive assembly (A) is established on the spherical cambered surface of installation body (1), beat subassembly (B) is established mounting panel (3) opposite side.
3. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 2 wherein: at least four ultrasonic sensors (22) are installed on a base plate (1c) of the installation body (1), and each ultrasonic sensor (22) is used for detecting the distance between the ears of a human body.
4. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 3 wherein: the four ultrasonic sensors (22) are distributed on the side of the arc concave surface of the base plate (1c) in a square shape, the distances between the four ultrasonic sensors (22) and the center point of the base plate (1c) are consistent, and the square surface is used as a reference surface for deflection adjustment of the adjustable loudspeaker device.
5. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 4 wherein: the processor is provided with a driving calculation module used for calculating the adjustment quantity of the driving module of the adjustable loudspeaker device, a driving formula is stored in the driving calculation module, and the expression of the driving formula is as follows:
wherein, DeltaY is the stepping amount of the driving motor, DeltaX is the deformation amount of the arc-shaped plate (1d), m is the arc length of the arc-shaped plate (1d) on the installation body (1), and l0Is the acoustic focal distance of the mounting body (1) in its original state1The distance of the ear detected by the rear ultrasonic sensor (22) is adjusted for the adjustable loudspeaker deflection.
6. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 2 wherein: beat subassembly (B) including installation casing (8), rotate on the shell bottom of this installation casing (8) and install swivel mount (9) that have centre bore (9a) to and ball seat (8a) of fixed connection on installation casing (8), wherein ball seat (8a) are located the inside of centre bore (9a), swivel mount (9) still have first inclined plane (9B) in the one end of keeping away from installation casing (8), be equipped with bulb pole (10) of being connected with ball seat (8a) bulb on mounting panel (3) to and with swivel mount (9) complex direction boss (11), wherein direction boss (11) have with second inclined plane (11a) of first inclined plane (9B) slip butt, still be equipped with drive swivel mount (9) pivoted power unit (12) in installation casing (8).
7. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 6 wherein: the power mechanism (12) comprises a first turbine (12a) and a first worm (12b) which are meshed with each other, wherein the first turbine (12a) is sleeved on the rotating table (9), and one end of the first worm (12b) is connected with the deflection motor (12 c).
8. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 7 wherein: and a notch (9c) is distributed at one end of the rotating table (9) which is abutted to the guide boss (11).
9. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 2 wherein: the driving assembly (A) comprises a push ring (5) abutted against the arc-shaped plate (1d) and a driving mechanism (6) for pushing the push ring (5) to move along the central line direction of the installation body (1);
threaded sleeves (2a) are symmetrically arranged on two sides of the push ring (5); actuating mechanism (6) are including setting up gear box (6a) on mounting panel (3) to and one end is installed in gear box (6a), and lead screw (6b) of the other end and thread bush (2a) screw-thread fit, gear box (6a) embeds there are intermeshing's second turbine and second worm, and wherein the second turbine suit is on lead screw (6b), and the second worm is keeping away from to be connected with second turbine meshing's one end driving motor (6 d).
10. The adjustable acoustic speaker system for use in an automotive seat headrest according to claim 9 wherein: the threaded sleeve (2a) is provided with an installation part (2c) at one end close to the push ring (5), and is sleeved on the push ring (5) through the installation part (2 c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170940.XA CN111031455B (en) | 2018-10-09 | 2018-10-09 | Adjustable sound-raising system for headrest of automobile seat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170940.XA CN111031455B (en) | 2018-10-09 | 2018-10-09 | Adjustable sound-raising system for headrest of automobile seat |
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| Publication Number | Publication Date |
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| CN111031455A true CN111031455A (en) | 2020-04-17 |
| CN111031455B CN111031455B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811170940.XA Active CN111031455B (en) | 2018-10-09 | 2018-10-09 | Adjustable sound-raising system for headrest of automobile seat |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595275A (en) * | 2012-02-29 | 2012-07-18 | 长城汽车股份有限公司 | Vehicle loudspeaker system with adjustable sound field |
| CN205248831U (en) * | 2015-11-17 | 2016-05-18 | 重庆瑞升康博电气有限公司 | Electric automobile exchanges intelligent charging stake |
| US20160241966A1 (en) * | 2015-02-17 | 2016-08-18 | Frank Joseph Pompei | Amplifiers for parametric loudspeakers |
| CN209159580U (en) * | 2018-10-09 | 2019-07-26 | 重庆延锋安道拓汽车部件***有限公司 | Voice device for car seat headrest |
-
2018
- 2018-10-09 CN CN201811170940.XA patent/CN111031455B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595275A (en) * | 2012-02-29 | 2012-07-18 | 长城汽车股份有限公司 | Vehicle loudspeaker system with adjustable sound field |
| US20160241966A1 (en) * | 2015-02-17 | 2016-08-18 | Frank Joseph Pompei | Amplifiers for parametric loudspeakers |
| CN205248831U (en) * | 2015-11-17 | 2016-05-18 | 重庆瑞升康博电气有限公司 | Electric automobile exchanges intelligent charging stake |
| CN209159580U (en) * | 2018-10-09 | 2019-07-26 | 重庆延锋安道拓汽车部件***有限公司 | Voice device for car seat headrest |
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| CN111031455B (en) | 2024-05-31 |
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Address after: No. 99, Pingtai Road, huangmaoping, Liangjiang New District, Chongqing Applicant after: Chongqing andotuo Auto Parts System Co.,Ltd. Address before: No. 99, Pingtai Road, huangmaoping, Liangjiang New District, Chongqing Applicant before: Chongqing Yanfeng Johnson Automotive Parts System Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: No. 99, Pingtai Road, huangmaoping, Liangjiang New District, Chongqing Applicant after: Anduto (Chongqing) Automotive Parts Co.,Ltd. Address before: No. 99, Pingtai Road, huangmaoping, Liangjiang New District, Chongqing Applicant before: Chongqing andotuo Auto Parts System Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |