Car Subwoofer Unit

Abstract

To provide an on-vehicle subwoofer unit which enables downsizing and secures the sufficient box capacity while inhibiting the on-vehicle subwoofer unit from occupying a vehicular interior space.SOLUTION: An on-vehicle subwoofer unit 100 includes: a box body 110; and a woofer 120 provided at the box body. The box body has a connection port 113 for connecting an internal space provided at the box body with an internal space provided at a structure part of a vehicle body. The on-vehicle subwoofer unit is disposed in a luggage space provided at the vehicle body and connected to a lower back panel provided at the vehicle body.EFFECT: The structure allows the internal space of the on-vehicle subwoofer unit and the internal space of the lower back panel to be integrated to secure the sufficient box capacity for outputting low range sound with the on-vehicle subwoofer unit housed within the luggage space.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an in-vehicle subwoofer unit. [Background technology]

[0002] The following Patent Document 1 discloses a speaker device for a subwoofer that is placed on a seat cushion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-330951 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technique disclosed in Patent Document 1 requires a large-sized housing in order to ensure a sufficient box capacity, and there is a risk that the speaker device will occupy space inside the vehicle. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, one embodiment of an in-vehicle subwoofer unit comprises a box body and a woofer provided in the box body, and the box body has a connection port for connecting the internal space of the box body to an internal space of a structural portion of the vehicle body. Effect of the Invention

[0006] According to one embodiment of the in-vehicle subwoofer unit, the in-vehicle subwoofer unit can be made smaller, and sufficient box capacity can be secured while preventing the space inside the vehicle from being occupied by the in-vehicle subwoofer unit. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is an external perspective view of a vehicle-mounted subwoofer unit according to an embodiment of the present invention, viewed obliquely from above; [Diagram 2] FIG. 1 is an external perspective view of an in-vehicle subwoofer unit according to an embodiment of the present invention, viewed from diagonally below; [Diagram 3] 1 is a cross-sectional view of an in-vehicle subwoofer unit according to an embodiment of the present invention; [Figure 4] FIG. 2 is an external perspective view of a vehicle-mounted subwoofer unit and a lower back panel according to an embodiment of the present invention, viewed obliquely from above; [Diagram 5] FIG. 1 is an external perspective view of a vehicle-mounted subwoofer unit and a lower back panel according to an embodiment of the present invention, viewed obliquely from below; [Figure 6] 1 is a cross-sectional view of a vehicle-mounted subwoofer unit and a lower back panel according to an embodiment; [Figure 7] FIG. 1 is a view showing an example of installation of an in-vehicle subwoofer unit according to an embodiment, viewed from outside the vehicle. [Figure 8] FIG. 1 is a diagram showing an example of an installation of an in-vehicle subwoofer unit according to an embodiment, viewed from inside the vehicle. [Figure 9] FIG. 1 is a diagram showing an example of an output characteristic of an in-vehicle subwoofer unit according to an embodiment; [Figure 10] FIG. 1 is a diagram showing an example of an output characteristic of an in-vehicle subwoofer unit 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 subwoofer unit 100) Fig. 1 is an external perspective view of a vehicle-mounted subwoofer unit 100 according to an embodiment, as viewed obliquely from above. Fig. 2 is an external perspective view of the vehicle-mounted subwoofer unit 100 according to an embodiment, as viewed obliquely from below. Fig. 3 is a cross-sectional view of the vehicle-mounted subwoofer unit 100 according to an embodiment.

[0010] The vehicle-mounted subwoofer 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 vehicle-mounted subwoofer unit 100 is connected to an audio device mounted on the vehicle, and outputs mainly low-frequency sounds in response to sound signals supplied from the audio device.

[0012] In this embodiment, the vehicle-mounted subwoofer unit 100 is disposed in a luggage space 13 of the vehicle body 10, and is connected to a lower back panel 200 of the vehicle body 10. As a result, the vehicle-mounted subwoofer unit 100 is accommodated within the luggage space 13, while the internal space of the vehicle-mounted subwoofer unit 100 (internal space 111 described below) and the internal space of the lower back panel 200 (internal space 200A described below) are integrated, and a box capacity sufficient for outputting low-frequency sounds can be ensured.

[0013] 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).

[0014] As shown in FIGS. 1 to 3, the in-vehicle subwoofer unit 100 includes a box body 110 and a woofer 120. The box body 110 and the woofer 120 are made of a plastic material.

[0015] <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 to be separable into upper case part 110A and lower case part 110B. Box 110 is box-shaped as shown in FIGS. 1 to 3, with upper case part 110A on the upper side (Z-axis positive side) and lower case part 110B on the lower side (Z-axis negative side) fitted together and fixed with a plurality of screws.

[0016] 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 in the luggage space 13 of the vehicle body 10, and therefore has an outer shape that fits into the surplus space 13A of the luggage space 13.

[0017] For example, the box body 110 has an elongated shape with the longitudinal direction being the front-to-rear direction (X-axis direction) and the transverse direction being the left-to-right direction (Y-axis direction) in accordance with the spatial shape of the surplus space 13A of the luggage space 13.

[0018] Also, for example, in accordance with the spatial shape of the surplus space 13A of the luggage space 13, the box body 110 has a relatively thin thickness in the up-down direction (Z-axis direction).

[0019] Also, for example, the side wall portion on the right side (positive side of the Y axis) of the box 110 has a recess 110C that is recessed inward so as to avoid objects or structures installed in the luggage space 13.

[0020] Also, for example, the side wall portion on the left side (positive side of the Y axis) of the box 110 has a shape that is partially curved along the inner wall surface on the left side (positive side of the Y axis) of the luggage space 13.

[0021] As a result, the box body 110 can effectively utilize the surplus space 13A of the luggage space 13, i.e., the box body 110 can have as large a capacity as possible without changing the design of the luggage space 13, and can be installed in the luggage space 13.

[0022] Furthermore, a plurality of mounting portions 116 are provided on a side wall portion on the rear side (X-axis negative side) of the box body 110, protruding rearward (X-axis negative direction). Each of the plurality of mounting portions 116 is provided with a screw 117 penetrating therethrough in the front-rear direction (X-axis direction) for screwing and fixing the mounting portion 116 to the front surface 201A of the lower back panel 200.

[0023] Further, a mounting portion 116 is provided on the right side (positive side of the Y axis) of the side wall of the box body 110 (lower case portion 110B) so as to protrude rightward (positive direction of the Y axis). A screw 117 for screwing and fixing the mounting portion 116 to the inner bottom surface of the luggage space 13 is provided penetrating the mounting portion 116 in the vertical direction (Z axis direction).

[0024] In this embodiment, the box 110 is shaped to fit into the surplus space 13A of the luggage space 13, so that the capacity of the internal space 111 of the box 110 is 6.5 L.

[0025] A connection port 113 is provided on a side wall portion on the rear side (X-axis negative side) of the box body 110. The connection port 113 is connected to an internal space 111 of the box body 110. The connection port 113 is connected to an opening 202 formed in a front surface 201A of a lower back panel 200 of the vehicle body 10. This allows the connection port 113 to connect the internal space 111 of the box body 110 to an internal space 200A of the lower back panel 200. In this embodiment, the connection port 113 has a horizontally long rectangular shape in accordance with the shape of the opening 202 of the lower back panel 200, but the shape of the connection port 113 is not limited thereto.

[0026] An annular cushioning member 114 is provided along the periphery of connection port 113 in box body 110. By being sandwiched between the periphery of connection port 113 and the periphery of opening 202 of lower back panel 200, cushioning member 114 comes into close contact with the periphery of opening 202, thereby making it possible to increase the degree of sealing of the connection portion between connection port 113 and opening 202.

[0027] <Woofer 120> The woofer 120 is a large-diameter speaker that mainly outputs low-frequency sounds. The woofer 120 is provided so as to face downward (Z-axis negative direction) with respect to the bottom surface of the box body 110. Specifically, as shown in FIG. 2 and FIG. 3, a speaker arrangement section 112 having an upwardly recessed shape is formed on the bottom surface of the lower case section 110B of the box body 110. Also, a circular speaker opening 112A (see FIG. 3) is formed on the ceiling surface of the speaker arrangement section 112. The woofer 120 is fitted into the speaker opening 112A from the lower side of the speaker opening 112A with the diaphragm 121 facing downward. The woofer 120 is then fixed to the ceiling surface of the speaker arrangement section 112 by a plurality of screws in the frame section 122.

[0028] The woofer 120 is connected to a cable (not shown) via a connector 115 provided on the surface of the upper case portion 110A of the box body 110, and is further connected to an audio device mounted on the vehicle via the cable. Thus, the woofer 120 is driven by a sound signal supplied from the audio device.

[0029] The woofer 120 is configured to include, for example, a large-diameter, disk-shaped diaphragm 121, a metallic, frame-shaped frame portion 122 surrounding the diaphragm 121, a magnet (not shown), a voice coil (not shown), etc., and outputs a sound corresponding to the sound signal by vibrating the diaphragm 121 in response to the sound signal. In this embodiment, the woofer 120 used has a diameter (200 mm, for example) suitable for outputting low-frequency sounds.

[0030] (Example of connection of the in-vehicle subwoofer unit 100) Fig. 4 is an external perspective view of the in-vehicle subwoofer unit 100 and the lower back panel 200 according to an embodiment, as viewed obliquely from above. Fig. 5 is an external perspective view of the in-vehicle subwoofer unit 100 and the lower back panel 200 according to an embodiment, as viewed obliquely from below. Fig. 6 is a cross-sectional view of the in-vehicle subwoofer unit 100 and the lower back panel 200 according to an embodiment.

[0031] As shown in Figures 4 and 5, the lower back panel 200 is a structural part that constitutes part of the body 10 of the vehicle, and is a metal panel-like member having a longitudinal shape with its longitudinal direction extending in the left-right direction (Y-axis direction).

[0032] 4 to 6, a cylindrical portion 201 extending in the left-right direction (Y-axis direction) from the left end to the right end of the lower back panel 200 is formed in the upper portion of the lower back panel 200. As a result, a large-capacity internal space 200A extending in the left-right direction (Y-axis direction) is formed in the upper portion of the lower back panel 200. As shown in Fig. 6, the cross-sectional shape of the internal space 200A in the XZ plane is approximately rectangular.

[0033] As shown in Figures 4 to 6, the in-vehicle subwoofer unit 100 is connected to the front surface 201A of the lower back panel 200 by abutting the peripheral edge of a connection port 113 provided on the side wall portion on the rear side (negative side of the X-axis) of the box body 110 against the peripheral edge of an opening 202 formed at the left end of the front surface 201A of the tubular portion 201 of the lower back panel 200.

[0034] The in-vehicle subwoofer unit 100 is fixed to the front surface 201A of the lower back panel 200 by a plurality of screws 117 that pass through each of the mounting portions 116 that protrude rearward from the side wall portion on the rear side (negative side of the X-axis) of the box body 110.

[0035] At this time, the cushioning material 114 provided on the peripheral portion of the connection port 113 is pressed against the peripheral portion of the opening 202 and adheres closely to the peripheral portion of the opening 202, thereby increasing the degree of sealing of the connection portion between the connection port 113 and the opening 202.

[0036] As a result, the in-vehicle subwoofer unit 100 integrates the internal space 111 of the box body 110 and the internal space 200A of the lower back panel 200 through the connection port 113, as shown in Figure 6, thereby ensuring sufficient box capacity for outputting low-frequency sounds.

[0037] In other words, the in-vehicle subwoofer unit 100 has a box body 110 made compact so that it can fit into the surplus space 13A of the luggage space 13, while the internal space 200A of the lower back panel 200 is utilized as part of the box capacity, so that the shortage of box capacity sufficient to output low-frequency sounds can be made up for by the internal space 200A of the lower back panel 200.

[0038] Therefore, according to one embodiment of the in-vehicle subwoofer unit 100, the in-vehicle subwoofer unit 100 can be made compact, and sufficient box capacity can be secured while preventing the in-vehicle space from being occupied by the in-vehicle subwoofer unit.

[0039] For example, in this embodiment, 6.5 [L] is ensured as the internal volume of the internal space 111 of the box 110. Also, in this embodiment, 13.0 [L] is ensured as the internal volume of the internal space 200A of the lower back panel 200. As a result, in this embodiment, it is possible to ensure a box volume of 19.5 [L], which is a large volume suitable for outputting low-frequency sounds, while miniaturizing the box 110.

[0040] In addition, the lower back panel 200 may have a plurality of relatively small openings formed therein in addition to the opening 202 to which the in-vehicle subwoofer unit 100 is connected. In this case, it is preferable that the plurality of openings be blocked with a sealant, a rubber plug, or the like to prevent sound from leaking out from the plurality of openings.

[0041] Also, the opening 202 of the lower back panel 200 may be an existing opening or may be newly formed. In the latter case, the opening shape of the opening 202 of the lower back panel 200 may be formed to match the opening shape of the connection port 113 of the box body 110. In the former case, the opening shape of the connection port 113 of the box body 110 may be formed to match the opening shape of the opening 202 of the lower back panel 200.

[0042] Furthermore, the capacity of the internal space 111 of the box 110 is not limited to 6.5 [L], and for example, the capacity of the internal space 111 may be 4.0 [L]. In this case, by connecting the box 110 to the lower back panel 200, the box 110 can be made even smaller while still ensuring a box capacity of 17.0 [L], which is a large capacity suitable for outputting low-frequency sounds.

[0043] (Installation example of the in-vehicle subwoofer unit 100) Fig. 7 is a diagram showing an installation example of the in-vehicle subwoofer unit 100 according to an embodiment from the vehicle exterior side. Fig. 8 is a diagram showing an installation example of the in-vehicle subwoofer unit 100 according to an embodiment from the vehicle interior side.

[0044] As shown in FIG. 7, the lower back panel 200 is provided below (Z-axis negative side) the rear door opening 11 of the vehicle body 10, extending in the left-right direction (Y-axis direction) from the left end to the right end of the vehicle body 10.

[0045] 7 and 8, a luggage space 13 is provided in front of the lower back panel 200 (X-axis positive side) and behind the rear seat 12 (X-axis negative side) in the vehicle body 10. In the luggage space 13, for example, a spare tire, tools, etc. are stored.

[0046] 7 and 8, a surplus space 13A is generated at the left end of the luggage space 13. The surplus space 13A is a space that does not have any parts or structural parts that would be obstacles to the installation of the in-vehicle subwoofer unit 100.

[0047] 7 and 8, a flat luggage tray 14 is placed on the luggage space 13. The luggage tray 14 covers the luggage space 13 and can flatten the upper part of the luggage space 13.

[0048] 7 and 8, the in-vehicle subwoofer unit 100 is placed in the surplus space 13A of the luggage space 13 so that the woofer 120 faces downward, and is connected to the lower back panel 200. The box body 110 of the in-vehicle subwoofer unit 100 is formed to have an outer shape that fits into the surplus space 13A according to the spatial shape of the surplus space 13A. Therefore, the in-vehicle subwoofer unit 100 can be installed in the luggage space 13 without changing the design of the internal structure of the luggage space 13.

[0049] 7 and 8, the in-vehicle subwoofer unit 100 fits into the surplus space 13A below the luggage tray 14, and can be installed in the luggage space 13 without interfering with the flatness of the luggage tray 14 and without occupying the in-vehicle space above the luggage tray 14. Furthermore, the in-vehicle subwoofer unit 100 can be installed in the luggage space 13 so as not to be visible from the outside through the luggage tray 14.

[0050] (An example of output sound characteristics) 9 and 10 are diagrams showing an example of characteristics of the output sound of the in-vehicle subwoofer unit 100 according to one embodiment. Fig. 9 shows the frequency-sound pressure characteristics of the output sound when the in-vehicle subwoofer unit 100 is not connected to the lower back panel 200. Fig. 10 shows the frequency-sound pressure characteristics of the output sound when the in-vehicle subwoofer unit 100 is connected to the lower back panel 200.

[0051] When a sound signal is supplied from an audio device to the in-vehicle subwoofer unit 100 of one embodiment, the subwoofer 120 mounted on the bottom surface of the box 110 outputs low-frequency sound toward the bottom of the box 110 (negative direction of the Z axis).

[0052] In this case, the in-vehicle subwoofer unit 100 of one embodiment connects the internal space 200A of the lower back panel 200 to the internal space 111 of the box body 110, and ensures sufficient box capacity (e.g., 19.5 [L]), thereby making it possible to increase the sound pressure of low-frequency sounds without increasing the size of the box body 110, and to suppress unnecessary reverberation when low-frequency sounds are generated.

[0053] For example, as shown in Figures 9 and 10, when the in-vehicle subwoofer unit 100 of one embodiment is connected to the lower back panel 200, it can sufficiently improve the sound pressure of low-frequency sounds below 100 Hz, compared to when it is not connected to the lower back panel 200.

[0054] As described above, the in-vehicle subwoofer unit 100 of one embodiment comprises a box body 110 and a woofer 120 provided in the box body 110, and the box body 110 has a connection port 113 for connecting an internal space 111 of the box body 110 to an internal space of a structural part of the vehicle body.

[0055] As a result, the in-vehicle subwoofer unit 100 according to one embodiment can reduce the size of the box 110, thereby preventing the space inside the vehicle from being occupied by the in-vehicle subwoofer unit 100. Furthermore, the in-vehicle subwoofer unit 100 according to one embodiment can ensure a box capacity sufficient to output low-frequency sounds by integrating the internal space 111 of the box 110 with the internal space of the structural part of the vehicle body through the connection port 113.

[0056] In addition, in one embodiment of the in-vehicle subwoofer unit 100, the connection port 113 is connected to an opening 202 in the lower back panel 200 of the vehicle body 10, thereby connecting the internal space 111 of the box body 110 to the internal space 200A of the lower back panel 200.

[0057] As a result, the in-vehicle subwoofer unit 100 of one embodiment can ensure sufficient box capacity to output low-frequency sounds by integrating the internal space 111 of the box body 110 and the internal space 200A of the lower back panel 200 through the connection port 113.

[0058] In the in-vehicle subwoofer unit 100 according to the embodiment, the connection port 113 has an opening shape that matches the opening 202 of the lower back panel 200 .

[0059] As a result, the in-vehicle subwoofer unit 100 according to the embodiment can efficiently integrate the internal space 111 of the box body 110 and the internal space 200A of the lower back panel 200.

[0060] In the in-vehicle subwoofer unit 100 according to one embodiment, the box body 110 is placed in a luggage space 13 provided in front of the lower back panel 200 in the vehicle body 10.

[0061] As a result, the in-vehicle subwoofer unit 100 of one embodiment can be installed in the vehicle body 10 so as not to occupy any space inside the vehicle other than the luggage space 13 (e.g., passenger living space, luggage compartment, etc.) and so as not to be noticeable.

[0062] In the in-vehicle subwoofer unit 100 according to the embodiment, the box body 110 has an outer shape that fits into the surplus space 13A of the luggage space 13.

[0063] As a result, the in-vehicle subwoofer unit 100 of one embodiment can be installed in the luggage space 13 without making design changes to the internal structure of the luggage space 13, thereby suppressing increases in installation costs.

[0064] Furthermore, the in-vehicle subwoofer unit 100 of one embodiment can be installed in the luggage space 13 without protruding from the luggage space 13, and therefore does not occupy any space within the vehicle other than the luggage space 13 (e.g., passenger living space, luggage compartment, etc.).

[0065] Moreover, the in-vehicle subwoofer unit 100 according to the embodiment includes a buffer member 114 provided along the periphery of the connection port 113.

[0066] As a result, the in-vehicle subwoofer unit 100 of one embodiment can tightly seal the connection port 113, thereby suppressing vibrations transmitted from the connection port 113 to the lower back panel 200 and suppressing sound leakage from the connection port 113, etc.

[0067] In the in-vehicle subwoofer unit 100 according to the embodiment, the capacity of the internal space 111 of the box 110 is half or less the capacity of the internal space 200A of the lower back panel 200.

[0068] As a result, the in-vehicle subwoofer unit 100 of one embodiment can reduce the size of the box body 110, while by utilizing the internal space 200A, it is possible to ensure a box capacity suitable for sufficiently outputting low-frequency sounds.

[0069] In addition, in the in-vehicle subwoofer unit 100 according to one embodiment, the total volume of the volume of the internal space 111 of the box 110 and the volume of the internal space 200A of the lower back panel 200 is 17 liters or more.

[0070] As a result, the in-vehicle subwoofer unit 100 of one embodiment can reduce the size of the box body 110, while by utilizing the internal space 200A, it is possible to ensure a box capacity suitable for sufficiently outputting low-frequency sounds.

[0071] 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.

[0072] For example, the in-vehicle subwoofer unit 100 according to an embodiment may be connected to any other structural part of the vehicle body, not limited to the lower back of the vehicle body, as long as it has at least an internal space. [Explanation of symbols]

[0073] 10. Body 11 Rear door opening 12 Rear seat 13 Luggage space 13A Excess Space 14 Luggage Tray 100 Car Subwoofer Unit 110 Box body 110A Upper case part 110B Lower case part 110C Recess 111 Interior Space 112 Speaker arrangement section 112A Speaker opening 113 Connection port 114 Cushioning material 115 Connector 116 Mounting part 117 Screw 120 Woofer 121 Diaphragm 122 Frame section 200 Lower back panel (structural part) 200A internal space 201 Cylindrical part 201A Front 202 Opening

Claims

1. A box body and A woofer provided in the box; Equipped with The box body is a connection port for connecting an internal space of the box body to an internal space of a structural portion of a vehicle body; The connection port is By being connected to an opening in a lower back panel of the vehicle body, the box body connects an internal space of the box body to an internal space of the lower back panel. A vehicle-mounted subwoofer unit.

2. The connection port is The lower back panel has an opening shape that matches the opening of the lower back panel.

2. The vehicle-mounted subwoofer unit according to claim 1.

3. The box body is The vehicle body is installed in a luggage space provided in front of the lower back panel.

3. The vehicle-mounted subwoofer unit according to claim 1 or 2.

4. The box body is The vehicle has an outer shape that fits into the surplus space of the luggage space.

4. The vehicle-mounted subwoofer unit according to claim 3.

5. A buffer member is provided along the periphery of the connection port.

5. The vehicle-mounted subwoofer unit according to claim 1, wherein the subwoofer unit is a casing.

6. The volume of the internal space of the box is equal to or less than half the volume of the internal space of the lower back panel.

6. The vehicle-mounted subwoofer unit according to claim 1,

7. The total volume of the internal space of the box and the internal space of the lower back panel is 17 liters or more.

7. The vehicle-mounted subwoofer unit according to claim 1,

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