Car speaker unit

Abstract

To improve sound quality while suppressing cost increase.SOLUTION: An onboard speaker unit includes a box that is incorporated into a vehicle body, a single speaker provided in the box so as to face the interior of the vehicle, and a tubular portion connected to the box and extending downward from the box. The tubular portion has an opening facing the interior of the vehicle at its lower end.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a car speaker unit. [Background technology]

[0002] The following Patent Document 1 discloses a technique for mounting a plurality of speakers on an inner panel of a vehicle door in order to ensure high-performance sound quality. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-330964 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology disclosed in Patent Document 1 requires attaching multiple speakers to the inner panel of the door, which may increase costs. Also, the technology disclosed in Patent Document 1 requires installing two speakers close to each other on the inner panel of the door, which may prevent good quality sound from being provided to viewers seated in the vehicle. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, an in-vehicle speaker unit according to one embodiment comprises a box body to be incorporated into the vehicle body, a single speaker provided in the box body facing toward the inside of the vehicle cabin, and a tubular portion connected to the box body and extending downwardly from the box body, with the tubular portion having an opening at its lower end configured to face toward the inside of the vehicle cabin. Effect of the Invention

[0006] According to the in-vehicle speaker unit according to one embodiment, it is possible to improve sound quality while suppressing an increase in costs. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is an external perspective view of a car speaker unit according to an embodiment; [Diagram 2] 1 is a plan view of a car speaker unit according to an embodiment; [Diagram 3] 1 is a cross-sectional view taken along line AA of a car-mounted speaker unit according to one embodiment; [Figure 4] FIG. 1 is a diagram showing an example of installation of an in-vehicle speaker unit in an inner door panel according to an embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0009] (Configuration of the in-vehicle speaker unit 100) Fig. 1 is an external perspective view of an in-car speaker unit 100 according to an embodiment. Fig. 2 is a plan view of the in-car speaker unit 100 according to an embodiment. Fig. 3 is a cross-sectional view of the in-car speaker unit 100 according to an embodiment taken along line AA (see Fig. 2).

[0010] The car speaker unit 100 shown in Figs. 1 to 3 is mounted on various vehicles (for example, gasoline engine automobiles, diesel engine automobiles, hybrid automobiles, electric automobiles, etc.).

[0011] The in-vehicle speaker unit 100 is incorporated into the body of a vehicle. In particular, the in-vehicle speaker unit 100 is incorporated into an inner door panel 10 of a right rear door of the body of the vehicle. The in-vehicle speaker unit 100 is connected to an audio device mounted in the vehicle, and outputs sound in response to a sound signal supplied from the audio device.

[0012] In this embodiment, for convenience, the direction corresponding to the fore-aft direction of the vehicle is referred to as the fore-aft direction (X-axis direction), the direction corresponding to the left-right direction of the vehicle is referred to as the left-right direction (Y-axis direction), and the direction corresponding to the up-down direction of the vehicle is referred to as the up-down direction (Z-axis direction).

[0013] As shown in FIGS. 1 to 3, the car speaker unit 100 includes a box body 110, a speaker 120, and a cylindrical portion .

[0014] <Box 110> Box 110 is a resin (for example, PP (polypropylene)) box-shaped member having a closed internal space 111 (see FIG. 3). Box 110 is configured so as to be separable into two parts: interior case part 110A and exterior case part 110B. Box 110 is box-shaped as shown in FIGS. 1 to 3, with interior case part 110A facing the interior of the vehicle (negative side of the Y axis) and exterior case part 110B facing the exterior of the vehicle (positive side of the Y axis) fitted together and fixed with a plurality of screws.

[0015] The box body 110 has an outer shape according to the installation location of the box body 110. For example, in this embodiment, the box body 110 is installed inside (at an upper part) of the inner door panel 10 of the right rear door of the vehicle, and therefore has an outer shape that fits into the surplus space inside (at an upper part) of the inner door panel 10.

[0016] For example, the upper part of the box body 110 has a roughly horizontally elongated rectangular shape when viewed in a plane, but the corners on the upper side (positive side of the Z axis) and rear side (negative side of the X axis) are cut out so as to avoid objects installed inside (the upper part) of the inner door panel 10.

[0017] In addition, for example, the lower part of the box body 110 has a curved shape that curves forward (positive direction of the X-axis) and downward (negative direction of the Z-axis) along the excess space inside (upper part) of the inner door panel 10.

[0018] Also, for example, the box body 110 has a small overall thickness in the direction corresponding to the lateral width direction of the vehicle (Y-axis direction) so that it can be accommodated in the surplus space inside (at the top) of the inner door panel 10.

[0019] This allows the box body 110 to effectively utilize the excess space inside (at the top) of the inner door panel 10, i.e., it can be installed inside (at the top) of the inner door panel 10 of the right rear door without changing the design of the inner door panel 10.

[0020] <Speaker 120> The speaker 120 is provided in the box 110 so as to face the inside of the vehicle cabin (Y-axis negative side). Specifically, a speaker holding part 112 protruding toward the inside of the vehicle cabin (Y-axis negative side) is formed on the surface of the inside-of-vehicle case part 110A of the box 110. The speaker holding part 112 has a roughly cylindrical shape. The speaker 120 is installed inside the speaker holding part 112 so as to face the inside of the vehicle cabin from the internal space 111 side of the box 110. At this time, the speaker 120 is fixed to the speaker holding part 112 so that its circular outer peripheral edge part is in close contact with the inner peripheral edge part of a circular speaker opening part 112A of the speaker holding part 112.

[0021] The speaker 120 is connected to a cable (not shown) via a connector (not shown) provided on the back of the box 110, and is further connected to an audio device mounted on the vehicle via the cable, so that the speaker 120 is driven by a sound signal supplied from the audio device.

[0022] The speaker 120 is configured with, for example, a diaphragm, a magnet, a voice coil, etc., and outputs a sound corresponding to the sound signal by vibrating the diaphragm in response to the sound signal. In this embodiment, a mid-high range speaker capable of outputting low-pitched sound and mid-high range sound is used as the speaker 120. Accordingly, the speaker 120 has a diameter (for example, 5.5 cm) suitable for outputting mid-high range sound.

[0023] A first buffer member 113 having an annular shape is provided along the periphery of speaker opening 112A in speaker holding portion 112. First buffer member 113 is sandwiched between the periphery of speaker opening 112A and inner door panel 10, thereby bringing the periphery of speaker opening 112A into close contact with inner door panel 10 and providing the effects of suppressing vibrations transmitted from the periphery of speaker opening 112A to inner door panel 10 and suppressing sound leakage from speaker opening 112A to the inside of the door.

[0024] <Cylindrical portion 130> The cylindrical portion 130 is a cylindrical member made of resin (for example, made of PP) that extends in a substantially straight line in the vertical direction (Z-axis direction). The upper end of the cylindrical portion 130 is connected to the lower end of the box body 110. Specifically, as shown in FIG. 3, the cylindrical portion 130 is fixed to the vehicle interior case portion 110A of the box body 110 by screwing inside the box body 110 with the upper end of the cylindrical portion 130 inserted into an opening 114 formed in the lower end of the box body 110. As a result, the cylindrical portion 130 is provided so as to extend downward from the lower end of the box body 110. The cylindrical portion 130 has an inner cylindrical space 130A (see FIG. 3), and the inner cylindrical space 130A is connected to the internal space 111 of the box body 110.

[0025] The cylindrical portion 130 has an opening 131 at its lower end, which is configured to face the inside of the vehicle cabin (Y-axis negative side). The opening 131 is connected to the cylindrical space 130A. This allows the in-vehicle speaker unit 100 to output the sound propagating from the internal space 111 of the box body 110 through the cylindrical space 130A (i.e., the low-frequency sound generated inside the box body 110 and inside the cylindrical portion 130 by resonating the low-frequency sound generated by the speaker 120) from the opening 131 toward the inside of the vehicle cabin (Y-axis negative side).

[0026] In particular, the in-vehicle speaker unit 100 of this embodiment is configured to generate Helmholtz resonance in the internal space 111 of the box 110 and the in-cylinder space 130A of the cylindrical portion 130, so that a sound in a specific low-frequency range can be output from the opening 131. Specifically, the shapes of the box 110 and the cylindrical portion 130 (in particular, the internal volume, the length of the cylindrical portion 130, and the inner diameter of the cylindrical portion 130) of the in-vehicle speaker unit 100 of this embodiment are determined by simulation and hearing evaluation so that a low-frequency sound (an example of the specific low-frequency sound) having a center frequency of 70 Hz can be output from the opening 131.

[0027] That is, the in-car speaker unit 100 of this embodiment can adjust the frequency range of the low-pitched sound output from the opening 131 to a desired frequency range by changing the shapes of the box 110 and the cylindrical portion 130. For example, by making the length of the cylindrical portion 130 longer, the sound output from the opening 131 can be made lower-pitched, and by making the inner diameter of the cylindrical portion 130 smaller, the sound output from the opening 131 can be made lower-pitched.

[0028] In this embodiment, the tubular portion 130 is a separate part from the box body 110, but this is not limited thereto, and the tubular portion 130 may be formed integrally with the box body 110. Also, in this embodiment, the tubular portion 130 has an elliptical tubular shape, but this is not limited thereto, and the tubular portion 130 may have other tubular shapes (for example, a cylindrical shape, a rectangular tubular shape, etc.).

[0029] In addition, an elliptical ring-shaped second buffer member 132 is provided along the peripheral edge of the opening 131 in the cylindrical portion 130. The second buffer member 132 is sandwiched between the peripheral edge of the opening 131 and the inner door panel 10, thereby bringing the peripheral edge of the opening 131 into close contact with the inner door panel 10, thereby suppressing vibrations transmitted from the peripheral edge of the opening 131 to the inner door panel 10 and suppressing sound leakage from the opening 131 to the inside of the door.

[0030] (Installation example of the in-vehicle speaker unit 100) FIG. 4 is a diagram showing an example of installation of the in-vehicle speaker unit 100 according to one embodiment on an inner door panel 10. As shown in FIG.

[0031] The inner door panel 10 shown in Fig. 4 is for a right rear door of a vehicle. As shown in Fig. 4, the inner door panel 10 has an upper opening 11 at the front and upper part. Also, as shown in Fig. 4, the inner door panel 10 has a lower opening 12 at the front and lower part.

[0032] An in-vehicle speaker unit 100 according to one embodiment is installed at a predetermined position on the rear side of the inner door panel 10 (i.e., on the vehicle exterior side (positive Y-axis side)). As a result, as shown in FIG. 4, the speaker 120 of the in-vehicle speaker unit 100 is disposed in the upper opening 11 of the inner door panel 10. Also, as shown in FIG. 4, the opening 131 of the in-vehicle speaker unit 100 is disposed in the lower opening 12 of the inner door panel 10.

[0033] 4, the in-vehicle speaker unit 100 is provided with a plurality of mounting portions 140 on the outer edge of the box body 110 and the outer edge of the cylindrical portion 130. Each mounting portion 140 is formed with a mounting hole 141. The in-vehicle speaker unit 100 is fixed to the back side of the inner door panel 10 with a plurality of screws (not shown) passing through each of the plurality of mounting holes 141, while being disposed at a predetermined position on the back side of the inner door panel 10.

[0034] (Operation of the car speaker unit 100) The in-vehicle speaker unit 100 of one embodiment is installed in the inner door panel 10 as shown in FIG. 4, so that when a sound signal is supplied from an audio device, sound mainly in the mid-to-high range corresponding to the sound signal can be output from the speaker 120 provided at the top of the box body 110 through the upper opening 11 of the inner door panel 10 toward the inside of the vehicle compartment (negative side of the Y axis).

[0035] At this time, the in-vehicle speaker unit 100 according to one embodiment can generate a sound in a specific low-frequency range (for example, a low-frequency range with a center frequency of 70 Hz) according to the sound signal by generating Helmholtz resonance in the internal space 111 of the box body 110 and the in-cylinder space 130A of the cylindrical portion 130 by vibration of the speaker 120. Then, the in-vehicle speaker unit 100 according to one embodiment can propagate the sound in the specific low-frequency range downward (Z-axis negative direction) through the in-cylinder space 130A and output it from the opening 131 provided at the bottom of the cylindrical portion 130 through the lower opening 12 of the inner door panel 10 toward the inside of the vehicle compartment (Y-axis negative side).

[0036] As a result, the in-vehicle speaker unit 100 according to one embodiment can output mainly mid-to-high range sounds toward the vicinity of the heads of viewers seated in the back seats in the vehicle cabin, and can also output a specific low range sound toward the vicinity of the feet of viewers seated in the back seats in the vehicle cabin, with a relatively simple configuration having a single speaker 120. Therefore, the in-vehicle speaker unit 100 according to one embodiment can improve sound quality while suppressing increases in costs.

[0037] 4, an excess space 13 is generated on the rear side and front of the inner door panel 10, and the in-vehicle speaker unit 100 according to one embodiment has an outer shape that fits into the excess space 13. This allows the in-vehicle speaker unit 100 according to one embodiment to be installed in the inner door panel 10 without changing the design of the inner door panel 10. The excess space 13 is a space that does not have any parts, structures, etc. that would be obstacles to the installation of the in-vehicle speaker unit 100.

[0038] In addition, in the vehicle, a pair of left and right in-vehicle speaker units 100 may be installed on each of the inner door panel 10 of the right rear door (see FIG. 4) and the inner door panel of the left rear door (not shown). In this case, a pair of in-vehicle speaker units 100 having a symmetrical structure may be installed on the inner door panel 10 of the right rear door and the inner door panel of the left rear door. In this case, the pair of left and right in-vehicle speaker units 100 can output mainly mid-high frequency sounds from both left and right directions toward the vicinity of the head of a viewer sitting in the back seat in the vehicle cabin, and can output a specific low frequency sound from both left and right directions toward the vicinity of the feet of a viewer sitting in the back seat in the vehicle cabin.

[0039] As described above, the in-vehicle speaker unit 100 of one embodiment comprises a box body 110 that is incorporated into the vehicle body, a single speaker 120 that is provided in the box body 110 so as to face the inside of the vehicle cabin, and a tubular portion 130 that is connected to the box body 110 and extends downward from the box body 110, and the tubular portion 130 has an opening 131 at its lower end that is configured to face the inside of the vehicle cabin.

[0040] As a result, the in-vehicle speaker unit 100 according to one embodiment has a relatively simple configuration having a single speaker 120, and can output a sound in a first range from the speaker 120 toward a relatively high position in the vehicle cabin, and can output a sound in a second range different from the first range toward a relatively low position in the vehicle cabin from the opening 131. Therefore, the in-vehicle speaker unit 100 according to one embodiment can improve sound quality while suppressing an increase in costs.

[0041] In particular, in one embodiment of the in-vehicle speaker unit 100, the speaker 120 outputs low-frequency and mid-high frequency sounds, and the opening 131 outputs low-frequency sounds generated inside the box body 110 and inside the cylindrical portion 130 by resonating the low-frequency sounds generated by the speaker 120.

[0042] As a result, the in-vehicle speaker unit 100 according to one embodiment has a relatively simple configuration having a single speaker 120, and can output mid-to-high range sounds from the speaker 120 toward a relatively high position in the vehicle cabin, and can also output low range sounds toward a relatively low position in the vehicle cabin from the opening 131. Therefore, the in-vehicle speaker unit 100 according to one embodiment can improve sound quality while suppressing increases in costs.

[0043] In addition, in the in-car speaker unit 100 according to one embodiment, the opening 131 outputs a low-frequency sound having a target frequency range that is generated according to the internal shape of the box 110 and the internal shape of the cylindrical portion 130 .

[0044] As a result, the in-car speaker unit 100 according to one embodiment can adjust the frequency range of the low-frequency sound output from the opening 131 to a target frequency range by changing the internal shape of the box 110 and the cylindrical portion 130.

[0045] In addition, the vehicle speaker unit 100 of one embodiment is incorporated into an inner door panel 10 of a door of the vehicle body, the speaker 120 is arranged at the upper part of the inner door panel 10 so as to face the inside of the vehicle compartment, and the opening 131 is arranged at the lower part of the inner door panel 10 so as to face the inside of the vehicle compartment.

[0046] As a result, the in-vehicle speaker unit 100 according to one embodiment has a relatively simple configuration having a single speaker 120, and can output mid- to high-range sounds from the speaker 120 toward the vicinity of the heads of viewers seated in seats inside the vehicle cabin, and can output low-range sounds toward the vicinity of the feet of viewers seated in seats inside the vehicle cabin from the opening 131. Therefore, the in-vehicle speaker unit 100 according to one embodiment can improve sound quality while suppressing increases in costs.

[0047] In addition, in the in-vehicle speaker unit 100 according to the embodiment, the speaker 120 is provided in the box 110, so that it is possible to suppress sound generated by the speaker 120 from leaking into the door.

[0048] In the in-vehicle speaker unit 100 according to the embodiment, the box body 110 has an outer shape that fits into the surplus space 13 on the rear side of the inner door panel 10.

[0049] As a result, the in-vehicle speaker unit 100 according to one embodiment can be installed on the rear side of the inner door panel 10 without changing the design of the inner door panel 10. Therefore, the in-vehicle speaker unit 100 according to one embodiment can improve sound quality while suppressing increases in costs.

[0050] In addition, the in-vehicle speaker unit 100 in one embodiment includes a first buffer member 113 provided between the speaker 120 and the inner door panel 10, and a second buffer member 132 provided between the opening 131 and the inner door panel 10.

[0051] As a result, the in-vehicle speaker unit 100 of one embodiment has the effects of suppressing vibrations transmitted from the speaker 120 and the opening 131 to the inner door panel 10, and suppressing sound leakage from the speaker 120 and the opening 131 to the inside of the door.

[0052] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

[0053] For example, the in-vehicle speaker unit 100 according to one embodiment may be installed not only in the inner door panel of the rear door of the vehicle body, but also in other parts of the vehicle body (for example, the inner door panel of the front door, an interior panel other than the inner door panel, etc.). [Explanation of symbols]

[0054] 10 Inner door panel (interior panel) 100 Car speaker unit 110 Box body 110A Vehicle interior case 110B Vehicle exterior case 111 Interior Space 112 Speaker holder 112A Speaker opening 113 First cushioning member 114 Opening 120 Speaker 130 Cylindrical part 130A cylinder space 131 Opening 132 Second cushioning member 140 Mounting part 141 Mounting hole

Claims

1. A box body to be incorporated into an interior panel of a vehicle body; a single speaker provided in the box body so as to face the inside of the vehicle interior; a cylindrical portion connected to the box body and extending downward from the box body; Equipped with The cylindrical portion is An opening portion is provided at a lower end portion thereof so as to face the inside of the vehicle compartment, The box body is The interior panel has an outer shape that conforms to the surplus space on the rear side thereof, The outer shape of the box body is The curved shape is curved forward and downward along the excess space, The cylindrical portion is The speaker extends downward at a position shifted forward from the single speaker provided in the box body. The in-vehicle speaker unit is characterized by the above.

2. The outer shape of the box body is The interior panel has a cutout shape that avoids objects to be installed on the rear side of the interior panel.

2. The car speaker unit according to claim 1, wherein the speaker unit is a speaker unit for a vehicle.

3. The speaker includes: Outputs low, mid and high range sounds, The opening is The low-frequency sound generated by the speaker resonates inside the box body and the cylindrical portion, thereby outputting the low-frequency sound generated inside the box body and the cylindrical portion.

3. The car speaker unit according to claim 1, wherein the speaker unit is a speaker unit for a vehicle.

4. The opening is Outputs low-pitched sounds with a center frequency of 70 Hz 4. The car speaker unit according to claim 3, wherein the speaker unit is a speaker unit for a vehicle.

5. The opening is The low-frequency sound having a target frequency range is output, the frequency range being generated according to the internal shape of the box body and the internal shape of the cylindrical portion.

5. The car speaker unit according to claim 3 or 4.

6. The speaker includes: The interior panel is disposed on an upper portion of the interior panel so as to face the inside of the vehicle compartment, The opening is The interior panel is disposed on a lower portion of the interior panel so as to face the inside of the vehicle compartment.

6. The car speaker unit according to claim 3, wherein the speaker unit is a speaker unit for a vehicle.

7. The interior panel is an inner door panel.

7. The car speaker unit according to claim 6,

8. a first buffer member provided between the speaker and the interior panel; a second buffer member provided between the opening and the interior panel.

8. The car speaker unit according to claim 6 or 7.

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