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, application number CN2022111026654, filed on September 9, 2022. [Technical field]

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

[0003] A speaker usually includes a diaphragm, a voice coil, a damper, and a magnetic circuit system, etc., but for car speakers applied to car audio systems, especially headrest speakers or ceiling speakers, the requirements of light weight, small size, high power, and good low frequency limiting must be met. Meanwhile, for general conventional speakers with a single damper, the mass and volume are generally large and require a deep installation depth, while for speakers without a damper, the weight is small but the power is low. Neither of these two speakers is applicable to car ceiling or headrest audio system speakers. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT Regarding 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, an edge of each of the dampers being partially connected to the basin frame, and 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 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 provided between the housing and opposite sides of the magnetic circuit system mounting base.

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

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

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

[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 on a horizontal plane of a rectangle or a rounded rectangle, and the voice coil, the magnetic circuit system and the damper are accommodated in the housing.

[0013] In some embodiments, the diaphragm has a diaphragm hole, the voice coil is provided through the diaphragm hole, and a dust cover is provided on the upper end of the voice coil, and the diaphragm has an elliptical or track shape with a hole in the middle when orthogonally projected on a horizontal plane, 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 a 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 reinforcement portions, which are raised or recessed, and which are 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 includes 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 headrest speaker being the car speaker described above. Specifically, the headrest speaker is a speaker mounted in a 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-mentioned speakers being used as the ceiling speaker. Specifically, the ceiling speaker is a speaker attached to the ceiling of a car. Effect 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, improves the depth of low frequency, solves the problems of bass expansion due to the reduction of 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, and realizes the functions of miniaturization and high power of the speaker, and at the same time, can be installed in a narrow space, saves space in the car, and increases the low frequency feeling of the speaker. In summary, it not only solves the problem of light weight and small size, but also ensures the advantages of high power and good low frequency limiting. [Brief description 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 the need for creative work.

[0024] [Figure 1] FIG. 1 is an exploded schematic view of a car speaker according to a first embodiment of the present invention. [Diagram 2] 1 is a cross-sectional view of a car speaker according to a first embodiment of the present invention. [Diagram 3] FIG. 11 is a perspective view of a car speaker according to a second embodiment of the present invention. [Figure 4] FIG. 11 is an exploded schematic view of a car speaker according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a plan view of a car speaker according to a second embodiment of the present invention. [Figure 6] FIG. 11 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. 11 is a perspective view of a diaphragm according to a third embodiment of the present invention. [Figure 9] FIG. 13 is a perspective view of a diaphragm of a comparative example. [Figure 10] FIG. 11 is a comparative diagram of distortion curves of speakers according to Example 2, Example 3, and a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 drawings. The description of these embodiments contributes to the understanding of the present invention, but does not constitute a limitation on the present invention. In addition, the technical features according to the various embodiments of the present invention described below can be combined with each other as long as they are not inconsistent with each other.

[0026] In the present invention, "inside" and "outside" are defined based on 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 intended to make the structure of car speakers easier to understand for those skilled in the art, and do not limit the state of the speaker after it is installed in the car. For example, the speaker may be mounted on an inclined or upright member inside the car, or on the underside of a car interior part. Example 1

[0027] In this embodiment, a car speaker for use in a car audio system is provided. Furthermore, the car speaker is 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 middle part of the diaphragm 2, and the lower end of the voice coil 3 is inserted into the magnetic gap 40, and the magnetic circuit system 4 is provided on the basin frame 1. The car speaker further includes two dampers 5 that are provided independently and spaced apart from each other, the two dampers 5 being located on opposite sides of the voice coil 3 (for example, on the left and right sides shown in Fig. 2), respectively, and the edge of each damper 5 is partially connected to the basin frame 1, the diaphragm 2 has two first connecting parts 21 recessed downward, and the first connecting parts 21 are connected to the dampers 5.

[0028] The basin frame 1 has a rectangular or rounded rectangular shape in the horizontal plane, so that the speaker as a whole has a long and narrow shape and can be easily installed in the vehicle without taking up space in the vehicle. Furthermore, the basin frame 1 includes a housing 11, which is hollow and has both upper and lower ends open, and the voice coil 3, the magnetic circuit system 4 and the damper 5 are all accommodated in the housing 11 and are basically not exposed from the housing 11, and are attached to other parts of the vehicle (such as a headrest skeleton or a ceiling) by the housing 11, and the housing 11 supports and protects the diaphragm 2, the voice coil 3, the magnetic circuit system 4 and the 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, which has elasticity 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 composed of a 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 in 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 provided 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 in the magnetic circuit system mounting base 12. The magnetic circuit system mounting base 12 has several connection ribs fixed to the middle of the long side 111 of the housing 11.

[0030] The basin frame 1 includes two damper mounting fixtures 13. As shown in FIG. 2, the two damper mounting fixtures 13 are located on the left and right sides of the magnetic circuit system mounting base 12, respectively, and each damper mounting fixture 13 is provided with one damper 5, that is, a damper 5 is provided between the housing 11 and the left and right opposing sides of the magnetic circuit system mounting base 12. Specifically, in a plan view, the shape of the damper mounting fixture 13 is approximately arc-shaped. The damper mounting fixture 13 is fixedly connected to the left end or right end of the short side 112 and / or long side 111 of the housing 11 by some connecting ribs. In this embodiment, the damper mounting fixture 13 is fixedly installed between the long side 111 by the connecting ribs, and is not connected to the short side 112 and is spaced apart. Furthermore, the damper mounting fixture 13, the magnetic circuit system mounting base 12, the connecting part and the housing 11 are integrally molded, for example, by plastic integral 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 connection portion 53 connected to the first connection portion 21 of the diaphragm 2, and a corrugated portion 52 located between the outer edge 51 and the second connection portion 53. The outer edge 51 is horizontally provided and lower than the corrugated portion 52 and the second connection portion 53, the shape of the outer edge 51 is an arc shape or a part of a rounded rectangle, and the outer edge 51 is bonded to the upper surface of the damper mounting fixture 13. The corrugated portion 52 has a plurality of wave crests and wave troughs, and is higher than the outer edge 51 as a whole. The corrugated portion 52 is provided to surround the second connection portion 53 and extends from half to three-quarters of the circumference of the second connection portion 53. The second connection portion 53 is provided horizontally, and the lower surface of the first connection portion 21 of the diaphragm 2 is provided horizontally, and the two are bonded to each other.

[0032] The diaphragm 2 is provided symmetrically, and the two first connection parts 21 are 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, and a dust cover 30 is provided on the upper end of the voice coil 3. The orthogonal projection of the diaphragm 2 on a horizontal plane is an ellipse or track shape with a hole in the middle, and the diaphragm 2 gradually slopes downward from the edge to the diaphragm hole 22, that is, 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 bonded, 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, the diaphragm 2 is provided with a lead through hole, 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 an audio source to be played.

[0034] The number of the magnetic circuit system 4 is one, and the magnetic circuit system 4 includes a magnetic conductive T-iron 41, a magnetic steel 42 attached to the T-iron 41, and a front panel 43, the front panel 43 is laminated on the magnetic steel 42, the lower surface of the front panel 43 and the upper surface of the magnetic steel 42 are bonded by an adhesive, the magnetic steel 42 is laminated on the base of the T-iron 41, the lower surface of the magnetic steel 42 and the upper surface of the base of the T-iron 41 are bonded by an adhesive, and the front panel 43 and the magnetic steel 42 are specifically attached to the cylindrical part of the T-iron 41, and this cylindrical part extends upward from the base of the T-iron 41. A magnetic gap 40 is formed between the outer surface of the T-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 bonding with an adhesive. The magnetic steel 42 may be a permanent magnet. The center of the lower surface of the T-iron 41 is recessed upward to form a first blind hole, and the center of the upper surface of the cylindrical part 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 part. The base of the T-iron 41 may be connected to the basin frame 1 to improve the connection strength.

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

[0036] The present embodiment is different from the first embodiment in the diaphragm 2, and the other parts are almost the same as the first embodiment. As shown in FIG. 3 to FIG. 7, the diaphragm 2 further includes a plurality of reinforcing parts 23, which are raised upward or recessed downward, and are located on both sides of the diaphragm hole 22, respectively, and are provided symmetrically. The reinforcing parts 23 extend in a direction from the diaphragm hole 22 to the short side 112 of the basin frame 1. Specifically, in this embodiment, the reinforcing parts 23 are raised upward and extend radially outward from the center of the diaphragm 2 as a whole. The number of reinforcing parts 23 is four, and each reinforcing part 23 has an inner end close to the diaphragm hole 22 and an outer end close to the apex corner of the diaphragm 2, and extends linearly as a whole. In this embodiment, the reinforcing parts 23 and the main body part of the diaphragm 2 are provided integrally and raised upward from the main body of the diaphragm 2. Meanwhile, in some other embodiments, the reinforcing portion 23 may be fixed to the upper or lower surface of the diaphragm 2 body, and has an elongated shape as a whole. The first connecting portion 21 is located between adjacent reinforcing portions 23. The diaphragm 2 has a rectangular design with rounded corners, and compared with a conventional diaphragm having an elliptical shape with 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] The present 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 a track shape, with the center being rectangular and the left and right side portions being roughly semicircular. The four reinforcing portions 23 extend from the diaphragm center 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 Fig. 9, the diaphragm 2 does not have a first connection part recessed downward, and does not have a reinforcing part protruding 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 is 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 diaphragm 2 of the Comparative Example. It can be seen that the speakers of Examples 2 and 3 have lower total harmonic distortion in each frequency band, and the acoustic effect is closer to the original sound and the distortion is smaller than that of the speaker using the diaphragm 2 of the Comparative Example.

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

[0041] In the car speaker of the above embodiment, the overall height of the speaker is reduced, the vibration amplitude of the speaker is increased, the resonance frequency of the speaker is effectively reduced, and the low-frequency depth is improved, solving the problems of the bass expansion caused by the reduction of 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 3 when there is no positioning branch, and realizing the functions of miniaturization and high power of the speaker, and at the same time, it can be installed in a narrow space, saving space in the car, and increasing the low-frequency feeling of the speaker. By using the non-circular diaphragm 2, the radiation area of ​​the speaker is expanded compared with the ordinary circular drum paper diaphragm 2, and the low-frequency feeling of the speaker is increased. This car speaker has better stability.

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

[0043] Additionally, it will be understood that "plurality" in this disclosure refers to two or more and other quantifiers of similar value.

[0044] Further, while the terms "first," "second," etc. are used to describe various pieces of information, it is understood that such information should not be limited to these terms, as these terms are merely used to distinguish between similar types of information 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 through other features between them, but not directly between them. And a first feature being "above," "upper," 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 only indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "lower," 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 only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0047] The above embodiments are merely intended to illustrate the technical ideas and features of the present invention and are preferred embodiments, with the objective of allowing those skilled in the art to understand the contents of the present invention and to practice the invention accordingly, but are not intended to 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 section 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 mounted 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 and independent of 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 connection portions recessed downward, each of the first connection portions being connected to a corresponding one of the dampers.

2. The car speaker according to claim 1, characterized in that 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 long sides arranged opposite each other, the magnetic circuit system mounting base is located within the housing and 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 opposing sides of the magnetic circuit system mounting base and the housing.

3. The car speaker of claim 2, characterized in that 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. The car speaker according to claim 3, characterized in that each of the dampers includes an outer edge connected to the damper mounting fixture and a second connection portion connected to the first connection portion of the diaphragm, the outer edge being lower than the second connection portion.

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 connection portion, and the outer edge is lower than the corrugated portion.

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

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

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

9. 2. The car speaker according to claim 1, wherein the diaphragm has a hole in the diaphragm, the voice coil passes through the hole in the diaphragm, and an upper end of the voice coil is covered with a dust cover.

10. The car speaker of claim 9, wherein the diaphragm, when projected orthogonally on a horizontal plane, is an ellipse or a track shape with a hole in the middle, and the diaphragm gradually slopes downward from the edge to the diaphragm hole.

11. The car speaker according to claim 9, characterized in that the diaphragm has a plurality of reinforcing portions, the reinforcing portions being raised upward or recessed downward, and the plurality of reinforcing portions being respectively located on opposite sides of the diaphragm hole and being arranged symmetrically.

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 a headrest speaker, 13. A car audio system, comprising a car speaker according to claim 1 as the headrest speaker.

14. A car audio system including a ceiling speaker, 13. A car audio system, comprising a car speaker according to claim 1 as the ceiling speaker.

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