Car speakers and audio systems

Abstract

The Company provides car speakers and audio systems. [Solution] A car speaker, comprising a basin frame, a diaphragm, a voice coil, and a magnetic circuit system having a magnetic gap, the diaphragm has an outer edge connected to the basin frame, the voice coil has an upper end connected to the middle part of the diaphragm and a lower end inserted into the magnetic gap, the magnetic circuit system is mounted on the basin frame, the car speaker further comprises two dampers independently spaced apart from each other, the two dampers are located on opposite sides of the voice coil, each damper has an edge part connected to the basin frame, the diaphragm has two first connection parts recessed downward, and the first connection parts are connected to the dampers. The car speaker of the present invention not only solves the problem of light weight and small size, but also ensures the advantages of high power and excellent low frequency limiting.

Description

Cross-Reference to Related Art Applications

[0001] This application claims priority to a Chinese patent application filed on September 9, 2022, application number CN2022111026654. [Technical Field]

[0002] The present invention relates to a car speaker and a car audio system. [Background technology]

[0003] A speaker typically includes a diaphragm, voice coil, damper, and magnetic circuit system. Car speakers for car audio systems, especially headrest or ceiling speakers, must be lightweight, compact, powerful, and offer excellent low-frequency response. While conventional speakers with a single damper typically have large mass and volume and require deep installation depth, damperless speakers are lightweight and compact but have low power. Neither of these two types of speakers is suitable for car ceiling or headrest audio system speakers. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION In view of the above problems, the present invention aims to provide a car speaker that can not only solve the problems of light weight and small size, but also ensure the advantages of high power and excellent low frequency limiting.

[0005] Another object of the present invention is to provide a car audio system. [Means for solving the problem]

[0006] One aspect of the present invention is a basin frame; a diaphragm having an outer edge connected to the basin frame; a voice coil having an upper end connected to a central portion of the diaphragm; A car speaker including: a magnetic circuit system having a magnetic gap and provided on the basin frame; The magnetic circuit system is provided on the basin frame, The car speaker further includes two dampers spaced apart and independent from each other, the two dampers being located on opposite sides of the voice coil, each damper having an edge that is partially connected to the basin frame, the diaphragm having two first connection portions recessed downward, each of the first connection portions being connected to a corresponding one of the dampers.

[0007] In some embodiments, the basin frame includes a housing and a magnetic circuit system mounting base, the housing is hollow and has an open upper end, the outer edge of the diaphragm is connected to the upper surface of the housing, the housing has a pair of opposite long sides, the magnetic circuit system mounting base is located within the housing and is fixedly connected to the middle of the long sides, the magnetic circuit system is mounted on the magnetic circuit system mounting base, and the dampers are respectively provided between the opposite sides of the magnetic circuit system mounting base and the housing.

[0008] In some embodiments, the basin frame further includes two damper mounting fixtures, each of which is provided with one of the dampers, and the housing further has two short sides connected between the ends of the two long sides, and the damper mounting fixtures are fixedly connected to the ends of the long sides and / or the short sides.

[0009] In some embodiments, each of the dampers includes an outer edge connected to the damper mounting fixture and a second connecting portion connected to the first connecting portion of the diaphragm, the outer edge being lower than the second connecting portion.

[0010] In some embodiments, each of the dampers includes a corrugated portion located between the outer edge and the second connecting portion, and the outer edge is lower than the corrugated portion.

[0011] In some embodiments, the shape of the outer edge is an arc or a portion of a rounded rectangle.

[0012] In some embodiments, the housing has an orthogonal projection in a horizontal plane of a rectangle or a rounded rectangle, and the voice coil, the magnetic circuit system, and the damper are housed in the housing.

[0013] In some embodiments, the diaphragm has a diaphragm hole, the voice coil passes through the diaphragm hole, and a dust cover is provided on the upper end of the voice coil, and the orthogonal projection of the diaphragm on a horizontal plane has an elliptical or track shape with a hole in the middle, and the diaphragm gradually slopes downward from the edge to the diaphragm hole.

[0014] In this specification, the term "track shape" specifically refers to a shape consisting of one rectangle and two semicircles / arches joined together, with the rectangle located in the middle of the two semicircles / arches. In some embodiments, the diaphragm has a plurality of reinforcing portions, each of which is raised or depressed, and each of which is located symmetrically on opposite sides of the diaphragm bore.

[0015] In some embodiments, the reinforcement extends from the diaphragm bore towards a short side of the basin frame.

[0016] In some embodiments, the number of the magnetic circuit systems is one, and the magnetic circuit system includes a T-iron, a magnetic steel attached to the T-iron, and a front panel, and the front panel is fixedly connected to the basin frame.

[0017] In some embodiments, a central portion of the lower surface of the T-iron is recessed upward to form a first blind hole, and a central portion of the upper surface of the cylindrical portion of the T-iron is recessed downward to form a second blind hole.

[0018] In some embodiments, the top surface of the T-iron base further comprises a circumferential groove surrounding the cylindrical portion thereof.

[0019] A second aspect of the present invention provides a car audio system including a headrest speaker, the car speaker being one of the above-described car speakers. Specifically, the headrest speaker is a speaker mounted in the headrest of a car seat.

[0020] A third aspect of the present invention provides a car audio system including a ceiling speaker, the car speaker being one of the above-described car speakers. Specifically, the ceiling speaker is a speaker attached to the ceiling of a car. [Effects of the Invention]

[0021] With the above solution, the present invention has the following advantages over the prior art:

[0022] The car speaker of the present invention reduces the overall height of the speaker, increases the vibration amplitude of the speaker, effectively reduces the resonance frequency of the speaker, and improves the depth of low frequencies, solving the problems of bass extension caused by the reduction in the area of ​​the positioning branch in the conventional speaker structure, and the problems of low power, transient distortion, and lateral movement distortion of the voice coil when there is no positioning branch, thereby achieving the functions of miniaturization and high power of the speaker, and at the same time allowing it to be installed in a narrow space, saving space inside the car and increasing the low frequency feeling of the speaker. In summary, it not only solves the problems of light weight and small size, but also ensures the advantages of high power and excellent low frequency limiting. [Brief explanation of the drawings]

[0023] In order to more clearly describe the technical solutions of the present invention, the following briefly introduces the necessary drawings used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work required.

[0024] [Figure 1] 1 is an exploded schematic view of a car speaker according to a first embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of a car speaker according to a first embodiment of the present invention. [Figure 3] FIG. 10 is a perspective view of a car speaker according to a second embodiment of the present invention. [Figure 4] FIG. 10 is an exploded schematic view of a car speaker according to a second embodiment of the present invention. [Figure 5] FIG. 10 is a plan view of a car speaker according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a perspective view of a diaphragm according to a second embodiment of the present invention. [Figure 7] 7 is a cross-sectional view taken along a direction perpendicular to the short side of the diaphragm shown in FIG. 6. [Figure 8] FIG. 10 is a perspective view of a diaphragm according to a third embodiment of the present invention. [Figure 9] FIG. 10 is a perspective view of a diaphragm of a comparative example. [Figure 10] FIG. 10 is a comparative diagram of distortion curves of speakers according to Example 2, Example 3, and a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0025] In order to facilitate understanding of the advantages and features of the present invention by those skilled in the art, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that the description of these embodiments contributes to understanding the present invention, but does not constitute a limitation on the present invention. Furthermore, the technical features of various embodiments of the present invention described below can be combined with each other unless they are mutually inconsistent.

[0026] In the present invention, "inside" and "outside" are defined relative to the center line of the voice coil, with the side closer to the center line of the voice coil being the inside and vice versa. The positional terms "upper," "lower," and "horizontal" are used to help those skilled in the art understand the structure of car speakers and do not limit the state of the speaker after it has been installed in a vehicle; for example, the speaker may be mounted on an inclined or upright member inside the vehicle, or on the underside of a vehicle interior component. Example 1

[0027] This embodiment provides a car speaker for use in a car audio system. The car speaker may be a headrest speaker attached to a headrest of a car seat and / or a ceiling speaker attached to a car ceiling. As shown in FIGS. 1 and 2 , the car speaker includes a basin frame 1, a diaphragm 2, a voice coil 3, and a magnetic circuit system 4 having a magnetic gap 40. The outer edge of the diaphragm 2 is connected to the basin frame 1, the upper end of the voice coil 3 is connected to the center of the diaphragm 2, and the lower end of the voice coil 3 is inserted into the magnetic gap 40. The magnetic circuit system 4 is mounted on the basin frame 1. The car speaker further includes two dampers 5 spaced apart from each other, each damper 5 positioned on either side of the voice coil 3 (e.g., on the left and right sides as shown in FIG. 2 ). The edge of each damper 5 is partially connected to the basin frame 1. The diaphragm 2 has two first connecting portions 21 recessed downward, which are connected to the dampers 5.

[0028] The basin frame 1 has an orthogonal projection of a rectangle or a rounded rectangle on a horizontal plane, so that the entire speaker has a long and narrow shape and can be easily installed in a vehicle without taking up much space inside the vehicle. Furthermore, the basin frame 1 includes a housing 11, which is hollow and open at both the top and bottom. The voice coil 3, magnetic circuit system 4, and damper 5 are all housed within the housing 11 and are essentially not exposed from the housing 11. The housing 11 is attached to other components of the vehicle (e.g., a headrest skeleton or ceiling), and the housing 11 supports and protects the diaphragm 2, voice coil 3, magnetic circuit system 4, and damper 5. The outer edge of the diaphragm 2 is connected to the upper surface of the housing 11. Specifically, the diaphragm 2 covers the upper end of the housing 11, and the outer edge of the diaphragm 2 is connected to the upper surface of the housing 11 via a yoke ring 20. The yoke ring 20 is elastic and is bonded to the upper surface of the housing 11. The housing 11 has a pair of opposing long sides 111 (extending in the left-right direction in FIG. 2) and two short sides 112 (extending in the direction of the paper in FIG. 2) connected between the long sides 111, and the two long sides 111 and the two short sides 112 are connected to enclose a space having a rectangular, rounded rectangle, or track shape, i.e., the short sides 112 extend along a straight line or an arc. In this specification, the term "track shape" refers to a shape consisting of one rectangle and two semicircles, with the rectangle located between the two semicircles.

[0029] The basin frame 1 further includes a magnetic circuit system mounting base 12 located on the housing 11 and fixedly connected to the middle of the long side 111, with a gap between it and the short side 112 of the housing 11 to provide a mounting space for the damper 5. The magnetic circuit system 4 is mounted on the magnetic circuit system mounting base 12. Specifically, the magnetic circuit system mounting base 12 is generally hollow cylindrical or annular, and the magnetic circuit system 4 is fixed within the magnetic circuit system mounting base 12. The magnetic circuit system mounting base 12 has several connecting ribs fixed to the middle of the long side 111 of the housing 11.

[0030] The basin frame 1 includes two damper mounting brackets 13. As shown in FIG. 2, the two damper mounting brackets 13 are located on the left and right sides of the magnetic circuit system mounting base 12, respectively. Each damper mounting bracket 13 is provided with a damper 5. That is, a damper 5 is provided between the housing 11 and the opposing left and right sides of the magnetic circuit system mounting base 12. Specifically, in a plan view, the damper mounting brackets 13 have a substantially arc-shaped configuration. The damper mounting brackets 13 are fixedly connected to the left or right ends of the short sides 112 and / or long sides 111 of the housing 11 by several connecting ribs. In this embodiment, the damper mounting brackets 13 are fixedly mounted between the long sides 111 by the connecting ribs and are not connected to the short sides 112 but are spaced apart. Furthermore, the damper mounting brackets 13, the magnetic circuit system mounting base 12, the connecting parts, and the housing 11 are integrally molded, for example, by integral plastic injection molding. The two damper mounting fixtures 13 are provided symmetrically with respect to the magnetic circuit system mounting base 12 .

[0031] The damper 5 includes an outer edge connected to the damper mounting fixture 13, a second connecting portion 53 connected to the first connecting portion 21 of the diaphragm 2, and a corrugated portion 52 located between the outer edge 51 and the second connecting portion 53. The outer edge 51 is horizontal and lower than the corrugated portion 52 and the second connecting portion 53. The outer edge 51 has an arc shape or a part of a rounded rectangle, and is bonded to the upper surface of the damper mounting fixture 13. The corrugated portion 52 has multiple wave crests and wave troughs and is higher than the outer edge 51 as a whole. The corrugated portion 52 surrounds the second connecting portion 53 and extends over half to three-quarters of the circumference of the second connecting portion 53. The second connecting portion 53 is horizontal, and the lower surface of the first connecting portion 21 of the diaphragm 2 is horizontal, and the two are bonded to each other.

[0032] The diaphragm 2 is provided symmetrically, with the two first connection portions 21 thereof being provided opposite each other. A diaphragm hole 22 is provided in the center of the diaphragm 2, and the voice coil 3 passes through the diaphragm hole 22, with a dust cover 30 covering the upper end of the voice coil 3. The orthogonal projection of the diaphragm 2 on a horizontal plane has the shape of an ellipse or track with a hole in the center, and the diaphragm 2 gradually slopes downward from the edge to the diaphragm hole 22, i.e., the main body of the diaphragm 2 is provided at an angle and roughly resembles a cone.

[0033] The upper end of the voice coil 3 is exposed above the diaphragm 2 through the diaphragm hole 22, and the voice coil 3 and the hole wall of the diaphragm hole 22 are adhered together, and the lower end of the voice coil 3 is inserted into the magnetic gap 40 of the magnetic circuit system 4. The upper end of the voice coil 3 is conductively connected to a pair of leads 31, a lead through hole is provided in the diaphragm 2, and a pair of solder lugs 32 are fixedly provided on the basin frame 1 (specifically, embedded in one damper mounting fixture 13 of the basin frame 1), and the lead 31 is conductively connected to the solder lugs 32 after passing through the lead through hole. This pair of solder lugs 32 may be used to connect a power amplifier or the like and to access the audio source to be played.

[0034] The magnetic circuit system 4 is one in number and includes a magnetically conductive train iron 41, a magnetic steel 42 attached to the train iron 41, and a front panel 43. The front panel 43 is laminated on the magnetic steel 42, and the underside of the front panel 43 is bonded to the upper side of the magnetic steel 42 with an adhesive. The magnetic steel 42 is laminated on the base of the train iron 41, and the underside of the magnetic steel 42 is bonded to the upper side of the base with an adhesive. The front panel 43 and the magnetic steel 42 are specifically attached to the cylindrical portion of the train iron 41, and this cylindrical portion extends upward from the base of the train iron 41. A magnetic gap 40 is formed between the outer surface of the train iron 41 and the inner surfaces of the magnetic steel 42 and the front panel 43. The magnetic steel 42 and the front panel 43 are fixedly connected to the basin frame 1; specifically, the magnetic steel 42 and the front panel 43 are inserted into the magnetic circuit system mounting base 12 and fixedly connected to the magnetic circuit system mounting base 12, for example, by adhesive. The magnetic steel 42 may be a permanent magnet. The center of the underside of the T-iron 41 is recessed upward to form a first blind hole, and the center of the upper surface of the cylindrical portion of the T-iron 41 is recessed downward to form a second blind hole. The upper surface of the base of the T-iron 41 is further provided with a circumferential groove surrounding the cylindrical portion. The base of the T-iron 41 may be connected to the basin frame 1 to improve connection strength.

[0035] The basin frame 1 is further provided with connection holes, through which it is connected to the interior panels of the car. Example 2

[0036] This embodiment differs from the first embodiment in the diaphragm 2, but is otherwise substantially the same as the first embodiment. As shown in FIGS. 3 to 7 , the diaphragm 2 further includes a plurality of reinforcing portions 23, each of which is raised or recessed. The reinforcing portions 23 are located on opposite sides of the diaphragm bore 22 and are arranged symmetrically. The reinforcing portions 23 extend from the diaphragm bore 22 toward the short side 112 of the basin frame 1. Specifically, in this embodiment, the reinforcing portions 23 are raised and extend radially outward from the center of the diaphragm 2 as a whole. There are four reinforcing portions 23, and each reinforcing portion 23 has an inner end close to the diaphragm bore 22 and an outer end close to the apex corner of the diaphragm 2, extending linearly as a whole. In this embodiment, the reinforcing portions 23 and the main body of the diaphragm 2 are integrally formed and protrude upward from the main body of the diaphragm 2. Meanwhile, in some other embodiments, the reinforcing portions 23 may be fixed to the upper or lower surface of the diaphragm 2 body, and have an elongated shape as a whole. The first connecting portions 21 are located between adjacent reinforcing portions 23. The diaphragm 2 has a rounded rectangular design structure, and compared to conventional diaphragms that have an elliptical shape due to the addition of reinforcing portions, the diaphragm of this embodiment has good rigidity, is more stable during speaker vibration, has a more stable center of gravity, and is easier to complete production. Example 3

[0037] This embodiment differs from the second embodiment in the shape of the diaphragm 2. As shown in Fig. 8, the orthogonal projection of the diaphragm 2 on a horizontal plane is truck-shaped, with a rectangular central portion and roughly semicircular left and right side portions. Four reinforcing portions 23 extend from the diaphragm hole 22 to both the left and right sides of the diaphragm 2. Comparative Example

[0038] The car speaker of the comparative example differs from Example 2 in the diaphragm 2. As shown in Figure 9, the diaphragm 2 does not have a first connection part that is recessed downward, and does not have a reinforcing part that is raised upward. The height of the car speaker of the comparative example is roughly the same as that of the car speaker of Example 2, but the damper is attached at a slightly higher position.

[0039] When the same performance test was performed on the car speakers of Examples 2 and 3 and the comparative example, the distortion curves are shown in Figure 10. In Figure 10, the thickest curve represents the distortion curve of the car speaker of Example 2, the thicker curve represents the distortion curve of the car speaker of Example 3, and the thinnest curve represents the distortion curve of the car speaker using the comparative example diaphragm 2. It can be seen that the speakers of Examples 2 and 3 have lower total harmonic distortion in each frequency band compared to the speaker using the comparative example diaphragm 2, resulting in acoustic effects that are closer to the original sound and less distortion.

[0040] The diaphragm 2 in the above embodiment is not a completely rigid body, and is affected by its own processing process and unevenness in the material, resulting in partial vibrations during vibration, which causes wave peaks and / or wave troughs in the mid-range and treble frequency ranges of the speaker, resulting in distortion. The diaphragm 2 in the above embodiment can effectively reduce distortion.

[0041] The car speaker of the above embodiment reduces the overall speaker height, increases the vibration amplitude of the speaker, effectively reduces the speaker's resonance frequency, and improves the depth of low frequencies. This solves the problems of bass extension caused by a reduced area of ​​the positioning branch in conventional speaker structures, and the problems of low power, transient distortion, and lateral movement distortion of the voice coil 3 when no positioning branch is used. This allows the speaker to be compact and powerful, while also being able to be installed in a small space, saving space inside the car and increasing the low-frequency feel of the speaker. The use of a non-circular diaphragm 2 increases the speaker's radiating area compared to a conventional circular drum paper diaphragm 2, thereby improving the low-frequency feel of the speaker. This car speaker also has better stability.

[0042] Those skilled in the art will understand that, unless otherwise specified, the singular forms "a," "the," and "this," as used herein, can include the plural. As used in this specification and claims, the terms "comprising" and "including" are intended to indicate the inclusion of specifically labeled steps and elements only; however, these steps and elements do not constitute an exclusive list, and other steps or elements may also be included in the method or apparatus.

[0043] Additionally, "plurality" in this disclosure refers to two or more, and other quantifiers are understood thereto.

[0044] Furthermore, while terms such as "first," "second," etc. are used to describe various pieces of information, it is understood that such information should not be limited to these terms. These terms are merely used to distinguish between pieces of information of the same type and do not imply any particular order or importance.

[0045] Indeed, terms such as "first," "second," etc. may be used interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of this disclosure.

[0046] In this embodiment, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features via other features between them rather than direct contact. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may include the first feature being directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0047] The above examples are merely for the purpose of illustrating the technical ideas and features of the present invention and are preferred examples, and their purpose is to enable those skilled in the art to understand the contents of the present invention and to practice it, but they do not limit the scope of protection of the present invention. [Explanation of symbols]

[0048] 1. Basin frame 11. Housing 111, long side 112, short side 12. Magnetic circuit system mounting base 13. Damper mounting fixture 2. Diaphragm 20. York Ring 21, first connection part 22, diaphragm hole, 23. Reinforcement part 3. Voice coil 30. Dust cover 31. Lead 32. Solder lug 4. Magnetic circuit system 40. Magnetic gap 41. T-iron 42, magnetic steel 43. Front panel 5. Damper 51, outer edge 52, corrugated part 53, second connection part

Claims

1. a basin frame; a diaphragm having an outer edge connected to the basin frame; a voice coil having an upper end connected to a central portion of the diaphragm; a magnetic circuit system having a magnetic gap and provided on the basin frame; A car speaker in which a lower end of the voice coil is inserted into the magnetic gap, The car speaker further includes two dampers spaced apart from each other, the two dampers being located on opposite sides of the voice coil, the edges of each damper being partially connected to the basin frame, the diaphragm having two first connecting portions recessed downward from the body of the diaphragm, each of the first connecting portions being connected to a corresponding one of the dampers, a diaphragm hole is formed in the center of the diaphragm, and the body of the diaphragm is gradually inclined downward from the edge to the diaphragm hole; Each of the dampers includes an outer edge connected to the basin frame and a second connection portion directly connected to one of the first connection portions of the diaphragm, the outer edge being lower than the second connection portion; A car speaker characterized by:

2. 2. The car speaker of claim 1, wherein the basin frame includes a housing and a magnetic circuit system mounting base, the housing is hollow and has an open upper end, the outer edge of the diaphragm is connected to the upper surface of the housing, the housing has a pair of opposite long sides, the magnetic circuit system mounting base is located within the housing and is fixedly connected to the middle of the long sides, the magnetic circuit system is mounted on the magnetic circuit system mounting base, and the dampers are respectively provided between the opposite sides of the magnetic circuit system mounting base and the housing.

3. The car speaker of claim 2, wherein the basin frame further includes two damper mounting fixtures, each of which is provided with one of the dampers, the housing further has two short sides connected between the ends of the two long sides, and the damper mounting fixtures are fixedly connected to the ends of the long sides and / or the short sides.

4. A car speaker as described in Claim 3, characterized in that the outer edges are each connected to the damper mounting fixture.

5. The car speaker according to claim 4 , wherein each of the dampers includes a corrugated portion located between the outer edge and the second connecting portion, and the outer edge is lower than the corrugated portion.

6. 5. The car speaker according to claim 4, wherein the shape of the outer edge is an arc or a part of a rounded rectangle.

7. 3. The car speaker according to claim 2, wherein the housing has an orthogonal projection in a horizontal plane of a rectangle or a rounded rectangle, and the voice coil, the magnetic circuit system, and the damper are housed in the housing.

8. 3. The car speaker of claim 2, wherein the number of the magnetic circuit system is one, the magnetic circuit system includes a T-iron, a magnetic steel attached to the T-iron, and a front panel, and the front panel is fixedly connected to the basin frame.

9. A car speaker as described in claim 1, characterized in that the voice coil passes through the diaphragm hole and the upper end of the voice coil is covered with a dust cover.

10. The car speaker according to claim 9, wherein the diaphragm has an elliptical or track-like shape with a hole in the middle when projected on a horizontal plane, and the diaphragm gradually slopes downward from the edge to the diaphragm hole.

11. 10. The car speaker of claim 9, wherein the diaphragm has a plurality of reinforcing portions, each of which is raised or recessed, and each of which is located symmetrically on opposite sides of the diaphragm hole.

12. The car speaker according to claim 11, wherein the reinforcing portion extends from the diaphragm hole to a short side of the basin frame.

13. A car audio system including headrest speakers, 13. A car audio system, wherein the car speaker according to claim 1 is used as the headrest speaker.

14. A car audio system including ceiling speakers, 13. A car audio system, wherein the car speaker according to claim 1 is used as the ceiling speaker.

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