JP7643185B2 - Vehicle door and vehicle - Google Patents

Description

This disclosure relates to a vehicle door and a vehicle.

A vehicle door having a speaker unit, as disclosed in Patent Document 1, for example, has an outer panel, an inner panel, a door trim, and a speaker unit. Here, the inner panel is disposed between the outer panel and the door trim, and an opening is provided in the inner panel for disposing the speaker unit.

Patent document 1 discloses a structure that releases sound from the surface of the speaker's diaphragm that faces the vehicle interior into the space inside the vehicle. In the structure described in Patent document 1, a storage section with a nearly sealed structure that prevents sound from leaking to the rear of the speaker is provided integrally with the inner panel.

JP 2004-320616 A

In Patent Document 1, the aforementioned storage section is provided so as to protrude from the opening of the inner panel into the space between the outer panel and the inner panel. Generally, mechanisms such as a window glass lifting mechanism and a door lock mechanism are disposed between the outer panel and the inner panel. For this reason, in the structure described in Patent Document 1, the storage section gets in the way when assembling the mechanisms, complicating door assembly and resulting in higher costs is an issue.

Taking the above into consideration, one aspect of the present disclosure aims to reduce the cost of vehicle doors that have speaker units.

A vehicle door according to a preferred embodiment of the present disclosure includes an outer panel facing the exterior of the vehicle, a door trim arranged on the passenger compartment side, an inner panel arranged between the outer panel and the door trim and having a first opening, and a speaker unit arranged in the first opening and having a diaphragm, the diaphragm having a first surface and a second surface facing in the opposite direction to the first surface, a first space sealed by using the first surface as a part of the wall surface is provided between the inner panel and the door trim, the first space is used as an enclosure for the speaker unit, a second space that propagates sound from the second surface is provided between the outer panel and the inner panel, and the inner panel has a second opening for releasing sound from the second space into the space inside the passenger compartment.

A vehicle according to a preferred embodiment of the present disclosure is equipped with a vehicle door according to the above-mentioned embodiment.

1 is an exploded perspective view of a vehicle door according to a first embodiment; 1 is a schematic cross-sectional view of a vehicle door according to a first embodiment. FIG. 2 is a schematic cross-sectional view of a vehicle door according to a first embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a vehicle door according to a second embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a vehicle door according to a second embodiment. FIG. 11 is a schematic cross-sectional view of a vehicle door according to a third embodiment. 1 is a diagram showing a vehicle according to an embodiment;

Below, an embodiment of the present disclosure will be described with reference to the drawings. Note that the dimensions and scale of each part in the drawings have been appropriately changed from the actual ones. Furthermore, the embodiment described below is a preferred specific example of the present disclosure. For this reason, various technically preferable limitations are imposed on this embodiment. However, the scope of the present disclosure is not limited to these forms unless otherwise specified in the following description to the effect that the present disclosure is limited.

1. Vehicle Door 1-1. First embodiment 1-1a. Overview of vehicle door FIG. 1 is an exploded perspective view of a vehicle door 1 according to a first embodiment. The vehicle door 1 is a door used in a vehicle such as an automobile, and has a speaker function. In the following, one direction in the thickness direction of the vehicle door 1 may be referred to as the X1 direction, and the opposite direction to the X1 direction may be referred to as the X2 direction. Here, when the vehicle door 1 is used in a vehicle, the X1 direction is the direction from the outside of the vehicle toward the inside of the vehicle cabin, and the X2 direction is the direction from the inside of the vehicle cabin toward the outside of the vehicle.

The vehicle door 1 will be outlined below with reference to FIG. 1. As shown in FIG. 1, the vehicle door 1 includes an outer panel 2, a door trim 3, an inner panel 4, a speaker unit 5, and a gasket 6. In the example shown in FIG. 1, a frame 8 for a window glass 7 that can move up and down is provided integrally with the outer panel 2 and the inner panel 4. Note that the frame 8 may be omitted.

The outer panel 2, inner panel 4, and door trim 3 are arranged in this order in the X1 direction. In this way, the outer panel 2 faces the outside of the vehicle, the door trim 3 is arranged on the passenger compartment side, and the inner panel 4 is arranged between the outer panel 2 and the door trim 3.

Between the outer panel 2 and the inner panel 4, there is provided a space S10, which is an example of a "second space." The space S10 is used as part of a propagation path that guides sound from the speaker unit 5 into the space of the vehicle interior, and propagates the sound from the speaker unit 5. Although not shown, for example, a window lifting mechanism for raising and lowering the window glass 7 and a door lock mechanism are disposed in the space S10.

Between the door trim 3 and the inner panel 4, there are provided a space S21, which is an example of a "first space", and a space S22, which is an example of a "third space". The space S21 is a sealed space using the speaker unit 5 as part of the wall surface, and is used as an enclosure 20 for the speaker unit 5. The space S22 is a space that does not communicate with the space S21, and is used as a propagation path that guides sound from the space S10 into the vehicle interior space.

The inner panel 4 has an opening 4a, which is an example of a "first opening", an opening 4b, which is an example of a "second opening", and an opening 4c, which is an example of a "third opening". The opening 4a is a hole for placing the speaker unit 5. In this embodiment, the opening 4a is blocked by the speaker unit 5. The opening 4b is a hole that communicates with each of the spaces S10 and S22. Therefore, the spaces S10 and S22 communicate with each other through the opening 4b. The opening 4c is in communication with the space S10, and is a hole used, for example, in the assembly work related to the vehicle door 1, for placing the lifting mechanism and door lock mechanism, etc., described above, in the space S10.

The door trim 3 has an opening 3a, which is an example of a "fourth opening." The opening 3a is a hole that communicates with both the space S22 and the space inside the vehicle cabin. Therefore, the space S10 and the space S22 communicate with each other through the opening 3a.

In the example shown in FIG. 1, the door trim 3 is detachably attached to the inner panel 4 by a number of connecting members 9. Each connecting member 9 is, for example, a rivet or clip made of resin. Each connecting member 9 has one end that is fixed to the door trim 3 and the other end that is inserted into a hole 4d in the inner panel 4.

The speaker unit 5 is placed in the opening 4a of the inner panel 4. In the example shown in FIG. 1, the speaker unit 5 is attached to the inner panel 4 by screwing using a plurality of screws 10. Here, the inner panel 4 is provided with holes 4e into which each screw 10 fits.

The gasket 6 is disposed between the door trim 3 and the inner panel 4. The gasket 6 seals the gap between the door trim 3 and the inner panel 4 so that the space S21 is sealed.

As can be seen from the above, in the vehicle door 1, the sound emitted in the X2 direction from the speaker unit 5 is released into the space inside the vehicle cabin via the space S10, the opening 4b, the space S22, and the opening 3a in that order. Here, because the space S21 is sealed, the sound emitted in the X1 direction from the speaker unit 5 is prevented from being released into the space inside the vehicle cabin.

1-1b. Each part of the vehicle door Each part of the vehicle door 1 will be described in detail below with reference to Fig. 2. Fig. 2 is a schematic cross-sectional view of the vehicle door 1 according to the first embodiment. For convenience of explanation, Fig. 2 shows a cross-section of the vehicle door 1 passing through the openings 4a, 4b, and 4c in a simplified manner.

As described above, the vehicle door 1 shown in FIG. 2 includes an outer panel 2, a door trim 3, an inner panel 4, a speaker unit 5, and a gasket 6.

Each of the outer panel 2 and the inner panel 4 is made of, for example, a steel plate. The outer panel 2 and the inner panel 4 are joined to each other by welding or the like. Note that each of the outer panel 2 and the inner panel 4 is not limited to being made of a steel plate, and may be made of, for example, an aluminum alloy or a carbon fiber composite material.

As described above, the inner panel 4 is provided with openings 4a, 4b, and 4c. The positions, planar shapes, and sizes of these openings are not particularly limited and are arbitrary. However, from the viewpoint of making it easier to close the opening 4a with the speaker unit 5, it is preferable that the planar shape of the opening 4a be a circle or a polygonal shape similar thereto so as to fit the outer shape of the speaker unit 5.

The opening 4c may be closed by a sheet member made of a resin material or the like. The space S10 and the space S22 may be in communication with each other via the opening 4c.

As described above, a space S22 is provided between the inner panel 4 and the door trim 3, which is connected to the space S10 via the opening 4b. As described above, the door trim 3 has an opening 3a for releasing sound SN from the space S22 into the space within the vehicle cabin. This allows sound SN from the opening 4b to be efficiently released into the space within the vehicle cabin.

The door trim 3 is made of, for example, resin. In the example shown in FIG. 1, the opening 3a is made of multiple holes. Note that the opening 3a may also be made of a single hole. The opening 3a may also be covered with a mesh material such as a saran net.

Here, opening 3a overlaps with opening 4b when viewed in the X1 or X2 direction. Therefore, sound SN from opening 4b via space S22 can be efficiently released into the space within the vehicle cabin. Note that opening 3a only needs to be connected to opening 4b via space S22, and does not need to overlap with opening 4b when viewed in the X1 or X2 direction.

A wall portion 3b for forming space S21 is provided on the surface of the door trim 3 facing the X2 direction, protruding in the X2 direction. When viewed in the X1 or X2 direction, the wall portion 3b surrounds the opening 4a and the speaker unit 5. The shape of the wall portion 3b when viewed in the X1 or X2 direction is not particularly limited, but it is preferable that the shape of the wall portion 3b when viewed in the X1 or X2 direction follows the outer edge of the opening 4a. In this case, it is prevented that openings other than the opening 4a are located inside the wall portion 3b when viewed in the X1 or X2 direction. This makes it possible to simplify the configuration for sealing the space S21.

In the example shown in FIG. 2, the wall portion 3b is configured integrally with the door trim 3. This allows the number of parts in the vehicle door 1 to be reduced compared to a configuration in which the wall portion 3b is separate from the door trim 3. Note that the wall portion 3b may also be configured separate from the door trim 3. Also, for example, if it is possible to directly adhere the wall portion 3b to the inner panel 4, the gasket 6 may be omitted.

A packing 6 is disposed between the wall portion 3b and the inner panel 4. The packing 6 seals the gap between the wall portion 3b and the inner panel 4 when it is elastically deformed between them. The packing 6 is an annular elastic member that fits around the entire circumference of the wall portion 3b, and is made of, for example, a rubber material or an elastomer material. The packing 6 may also be made of a closed-cell foam.

In this way, the door trim 3 is integrated with at least a portion of the enclosure 20. This reduces the number of parts and simplifies assembly compared to a configuration in which the enclosure 20 is separate from the door trim 3, etc.

Here, the wall 3b constitutes a part of the enclosure 20. That is, the enclosure 20 has the wall 3b that surrounds the speaker unit 5 when viewed in the vibration direction of the diaphragm 5a. This has the advantage that it is easy to seal the space S21 even if the inner panel 4 has an opening 4c other than the opening 4a, or if there is a gap D between the inner panel 4 and the door trim 3 that leads to the space inside the vehicle cabin.

In this embodiment, a gap D is formed between the door trim 3 and the inner panel 4. The gap D is connected to both the space S22 and the space inside the vehicle cabin. Therefore, the space S22 and the space inside the vehicle cabin are connected to each other through the gap D. Therefore, the sound SN from the opening 4b can be efficiently released into the space inside the vehicle cabin through the gap D. Therefore, the gap D can be said to be an example of a "fourth opening". Note that, when the opening 3a is provided in the door trim 3 as described above, the gap D may be blocked by a packing made of rubber or elastomer. Also, when the space S22 and the space inside the vehicle cabin are connected to each other through the gap D, the aforementioned opening 3a may be omitted.

The speaker unit 5 is disposed in the opening 4a of the inner panel 4 so as to separate the space S10 from the space S21. The speaker unit 5 is an assembly made up of main components that convert electrical sound signals representing sound into sound. The speaker unit 5 has a diaphragm 5a, a drive unit 5b, and a frame 5c.

The speaker unit 5 has a magnetic circuit 5b1 for driving the diaphragm 5a. The magnetic circuit 5b1 is disposed between the diaphragm 5a and the outer panel 2. This has the advantage that it is easier to increase the volume of the enclosure 20 compared to a configuration in which the magnetic circuit 5b1 is disposed between the diaphragm 5a and the door trim 3.

The diaphragm 5a is a vibrating body made of a sheet material, and emits sound by vibration. In the example shown in FIG. 2, the diaphragm 5a vibrates in the X1 direction or the X2 direction. The sheet material is obtained, for example, by hardening or solidifying a resin material impregnated into a fiber substrate. Examples of the resin material include acrylic resin, polyurethane, melamine resin, modified rubber resin, and phenolic resin. Examples of the fiber substrate include carbon fiber, aramid fiber, glass fiber, ceramic fiber, silica fiber, metal fiber, potassium titanate fiber, zirconia fiber, polyacrylate fiber, polyphenylene sulfide fiber, vinylon fiber, rayon fiber, nylon fiber, polyester fiber, acrylic fiber, polypropylene fiber, polyethylene fiber, cotton fiber, hemp fiber, and cellulose fiber.

The diaphragm 5a has a surface FA and a surface FB facing in the opposite direction to surface FA. In this embodiment, surface FA is an example of a "first surface" and is used as part of the wall surface of space S21. Therefore, surface FA emits sound into space S21. Also, in this embodiment, surface FB is an example of a "second surface" and faces space S10. Therefore, surface FB emits sound SN into space S10. In the example shown in FIG. 2, the diaphragm 5a is cone-shaped, with surface FA being the inner wall surface and surface FB being the outer wall surface. Note that the shape of the diaphragm 5a is not limited to a cone shape and may be, for example, a dome shape, etc.

The driving unit 5b is a mechanism that drives the diaphragm 5a based on an input electrical sound signal. In this embodiment, the driving unit 5b is disposed between the diaphragm 5a and the outer panel 2. The driving unit 5b has a magnetic circuit 5b1 and a voice coil 5b2. The magnetic circuit 5b1 is, for example, composed of a permanent magnet and a yoke, and the magnetic flux from the permanent magnet is guided to the voice coil 5b2 by the yoke. The voice coil 5b2 is fixed to the diaphragm 5a, and when an electrical sound signal is input, it vibrates the diaphragm 5a by interaction with the magnetic force from the magnetic circuit. This vibration causes the diaphragm 5a to emit a sound based on the sound signal. Note that the driving unit 5b is not limited to a configuration having a magnetic circuit 5b1 and a voice coil 5b2, and may be any configuration as long as it can drive the diaphragm 5a based on a sound signal.

The frame 5c is a structure that supports the diaphragm 5a so that it can vibrate, and is fixed to the magnetic circuit 5b1 of the drive unit 5b. The diaphragm 5a and the drive unit 5b are each appropriately joined to the frame 5c using an adhesive or the like. The frame 5c is made of, for example, a metal material or a resin material. The frame 5c is attached to the inner panel 4 using the aforementioned multiple screws 10. Note that a packing may be placed between the frame 5c and the inner panel 4 to ensure airtightness of the space S21. The packing is made of, for example, rubber or elastomer.

Here, frame 5c is configured to be able to emit sound from diaphragm 5a in both the X1 and X2 directions. That is, in this embodiment, frame 5c is configured so that face FA is exposed to space S21 and face FB is exposed to space S10. Note that the shape of frame 5c is not limited to the example shown in FIG. 2 and may be any shape.

The above speaker unit 5 is preferably a subwoofer. In a configuration in which the enclosure 20 is provided between the inner panel 4 and the door trim 3, it is easier to increase the volume of the enclosure 20 compared to a configuration in which the enclosure 20 is provided between the outer panel 2 and the inner panel 4. For this reason, when a speaker unit for ultra-low frequencies such as a subwoofer is used as the speaker unit 5, the effect of the present disclosure of improving the bass reproduction capability is remarkable. Note that a subwoofer is a speaker responsible for reproducing ultra-low frequency range frequencies of approximately 100 Hz or less (preferably 80 Hz or less).

1-1c. Function of the Vehicle Door In the vehicle door 1 configured as above, the sound SN emitted from the surface FB of the diaphragm 5a to the space S10 is released into the space in the vehicle cabin through the opening 4b. On the other hand, since the space S21 using the surface FA of the diaphragm 5a as a part of the wall surface is sealed, the emission of the antiphase sound from the surface FA into the space in the vehicle cabin is reduced. As a result, the bass reproduction capability can be improved compared to the configuration in which the sound from the surface FA is emitted into the space in the vehicle cabin. In addition, since the space S21 is used as the enclosure 20, the bass reproduction capability can also be improved in this respect. Moreover, since the enclosure 20 is provided between the inner panel 4 and the door trim 3, the workability of assembling the mechanism disposed between the outer panel 2 and the inner panel 4 can be improved compared to the configuration in which the enclosure 20 is provided between the outer panel 2 and the inner panel 4. Therefore, the assembly of the vehicle door 1 is simplified, and as a result, the cost of the vehicle door 1 can be reduced.

In contrast, the configuration shown in FIG. 3 or FIG. 4 does not provide the above-mentioned effects of the vehicle door 1. This point will be briefly explained below with reference to FIG. 3 and FIG. 4.

Figure 3 is a schematic cross-sectional view of a vehicle door 1X according to Reference Example 1. The vehicle door 1X is configured so that the sound SNa from the surface FA is emitted into the space inside the vehicle cabin. In the door trim 3X of the vehicle door 1X, the opening 3a is connected to the space S21, and the sound SNa from the surface FA is emitted from the opening 3a into the vehicle cabin. Here, the sound SNb from the surface FB leaks into the space inside the vehicle cabin through the gap D. For this reason, in the vehicle door 1X, the sound SNa and the sound SNb cancel each other out inside the vehicle cabin, resulting in a deterioration in sound quality. Here, it is possible to consider sealing the gap D, but depending on the shape of the vehicle door 1X, etc., completely sealing the gap D may be practically difficult or may result in high costs.

Figure 4 is a schematic cross-sectional view of a vehicle door 1Y according to Reference Example 2. The vehicle door 1Y is configured so that the sound SNa from the surface FA is emitted into the space inside the vehicle cabin, similar to the vehicle door 1X of Reference Example 1. However, in the vehicle door 1Y, an enclosure 20Y is provided between the outer panel 2 and the inner panel 4. The enclosure 20Y forms a sealed space S11 using the surface FB as a part of the wall surface. In such a vehicle door 1Y, the enclosure 20Y protrudes into the space S10, which deteriorates the workability when assembling mechanisms such as a window lifting mechanism and a door lock mechanism to be placed in the space S10. In addition, since the size of the enclosure 20Y is restricted by the installation space in the space S10 and the size of the opening 4a, it is difficult to increase the capacity of the enclosure 20Y. For this reason, the vehicle door 1Y cannot improve the bass reproduction capability.

1-2. Second embodiment Hereinafter, a second embodiment of the present disclosure will be described. In the following exemplary embodiments, for elements whose actions and functions are similar to those of the first embodiment, the reference numerals used in the description of the first embodiment will be used and detailed descriptions of each will be omitted as appropriate.

Figure 5 is a schematic cross-sectional view of a vehicle door 1A according to the second embodiment. The vehicle door 1A is configured in the same manner as the vehicle door 1 of the first embodiment described above, except that the door trim 3 and the packing 6 are replaced with a door trim 3A and a packing 6A, and a sealing member 11 is added.

On the surface of the door trim 3A facing the X2 direction, a wall portion 3c is provided in place of the wall portion 3b. When viewed in the X1 or X2 direction, the wall portion 3c surrounds the speaker unit 5, the opening 4a, and the opening 4c. Here, the packing 6A seals the gap between the wall portion 3c and the inner panel 4 in a state where it is elastically deformed between them. The packing 6A is an annular elastic member that fits around the entire circumference of the wall portion 3c, and is made of, for example, a rubber material or an elastomer material, similar to the packing 6 in the first embodiment.

Here, the space S21 uses the inner panel 4 as a wall surface. Therefore, the volume of the enclosure 20 can be made larger than in a configuration in which the space S21 is formed using a member separate from the inner panel 4.

As described above, the space S21 used as the enclosure 20A is provided as an enclosed space inside the wall portion 3c.

As described above, the inner panel 4 has an opening 4c, which is an example of a "third opening", and the opening 4c communicates with the space S10. A sealing member 11 that closes the opening 4c is disposed between the inner panel 4 and the door trim 3. This prevents the space S21 from communicating with the space S10 via the opening 4c. As a result, the inner panel 4 can be used over a wide area as a wall surface of the enclosure 20A, and as a result, the volume of the enclosure 20 can be increased.

The sealing member 11 is provided over a range that includes the opening 4c when viewed in the X1 or X2 direction. The sealing member 11 is fixed to one of the door trim 3A and the inner panel 4 with adhesive or double-sided tape, etc.

The sealing member 11 is made of an elastic material such as a rubber material or an elastomer material. Here, the sealing member 11 is preferably a closed-cell foam. Closed-cell foam has extremely excellent flexibility. Therefore, by making the sealing member 11 a closed-cell foam, the sealing member 11 can be suitably attached to the inner panel 4 even if the shape of the inner panel 4 is complex. Moreover, closed-cell foam does not have air permeability. Therefore, by making the sealing member 11 a closed-cell foam, communication between the space S21 and the space S10 through the opening 4c is suitably prevented.

In addition, in addition to the wall portion 3c, a rib 3d is provided on the surface of the door trim 3A facing the X2 direction. The rib 3d is a protrusion for pressing the sealing member 11 toward the inner panel 4. The shape of the rib 3d when viewed in the X1 direction or the X2 direction is not particularly limited, but is configured so as not to divide the space S21. For example, a configuration may be adopted in which a gap is provided between the rib 3d and the wall portion 3c, or a through hole is provided in the rib 3d.

In this way, the door trim 3 has a rib 3d that presses the sealing member 11 against the inner panel 4, thereby improving the adhesion between the sealing member 11 and the inner panel 4.

The second embodiment described above also improves bass reproduction capabilities and reduces the cost of the vehicle door 1A.

1-3. Third embodiment Hereinafter, a third embodiment of the present disclosure will be described. In the following exemplary embodiments, for elements whose actions and functions are similar to those of the first embodiment, the reference numerals used in the description of the first embodiment will be used, and detailed descriptions of each will be omitted as appropriate.

Figure 6 is a schematic cross-sectional view of a vehicle door 1B according to the third embodiment. The vehicle door 1B is configured similarly to the vehicle door 1A of the second embodiment described above, except for the mounting posture of the speaker unit 5 and the related configuration. Here, the vehicle door 1B has a door trim 3B instead of the door trim 3A of the second embodiment.

In the vehicle door 1B, the speaker unit 5 is arranged so that the surface FA faces the X2 direction and the surface FB faces the X1 direction. In this embodiment, the surface FB is an example of a "first surface" and is used as part of the wall surface of the space S21. In this embodiment, the surface FA is an example of a "second surface" and faces the space S10 through the opening 4a. Therefore, sound from the surface FA is emitted into the space S10. By arranging the speaker unit 5 in this manner, the speaker unit 5 is prevented from protruding into the space S10. As a result, the workability of assembling the mechanism arranged between the outer panel 2 and the inner panel 4 can be improved compared to a configuration in which the surface FA faces the X1 direction and the surface FB faces the X2 direction.

In this embodiment, the speaker unit 5 is attached to the door trim 3B by screwing using the screw 10. Therefore, after the speaker unit 5 is attached to the door trim 3B, the door trim 3B can be attached to the inner panel 4. Therefore, compared to a configuration in which the speaker unit 5 is attached to the inner panel 4, the workability when attaching the speaker unit 5 can be improved.

Here, the door trim 3B is configured similarly to the door trim 3A of the second embodiment, except that it has a wall portion 3e instead of the wall portion 3c. The wall portion 3e is configured similarly to the wall portion 3c, except that it has a structure for fastening with the screw 10.

The third embodiment described above also improves bass reproduction capabilities and reduces the cost of the vehicle door 1B.

2. Vehicle Fig. 7 is a diagram showing a vehicle 100 according to an embodiment. The vehicle 100 is an automobile, and has five doors 101R, 101L, 102R, 102L, and 103. The door 101R is a right front side door. The door 101L is a left front side door. The door 102R is a right rear side door. The door 102L is a left rear side door. The door 103 is a back door.

Of the above doors 101R, 101L, 102R, 102L, 103, at least one door is any of the vehicle doors 1, 1A, 1B described above. That is, the vehicle 100 is equipped with any of the vehicle doors 1, 1A, 1B. In such a vehicle 100, the vehicle doors 1, 1A, 1B can be made at low cost, thereby enabling cost reduction. In addition, since the vehicle doors 1, 1A, 1B have excellent bass reproduction capabilities, excellent sound quality can be provided to the user inside the vehicle cabin.

3. Modifications The above embodiment may be modified in various ways. Specific modified embodiments are exemplified below. Two or more embodiments arbitrarily selected from the following examples may be appropriately combined as long as they are not inconsistent.

3-1. Modification 1
In the above-described first and second embodiments, the speaker unit 5 is attached to the inner panel 4, but the present invention is not limited to this configuration. For example, the speaker unit 5 may be attached to the door trim 3 by screwing or the like.

3-2. Modification 2
In the third embodiment described above, the speaker unit 5 is attached to the door trim 3B, but the present invention is not limited to this configuration. For example, the speaker unit 5 may be attached to the inner panel 4 by screwing or the like.

3-3. Modification 3
In each of the above-mentioned embodiments, the vibration direction of the diaphragm 5a is parallel to the thickness direction of the vehicle door 1, 1A, 1B, but is not limited to this configuration. For example, the vibration direction of the diaphragm 5a may be perpendicular or inclined to the thickness direction of the vehicle door 1, 1A, 1B. In this case, the shapes of the walls 3b, 3c, 3e, etc. are appropriately changed depending on the installation posture of the speaker unit 5.

4. Supplementary Note The above-described exemplary embodiments and modifications may be understood to include the following aspects.

A vehicle door according to a preferred first aspect of the present disclosure includes an outer panel facing the exterior of the vehicle, a door trim arranged on the passenger compartment side, an inner panel arranged between the outer panel and the door trim and having a first opening, and a speaker unit arranged in the first opening and having a diaphragm, the diaphragm having a first surface and a second surface facing in the opposite direction to the first surface, a first space sealed by using the first surface as a part of the wall surface is provided between the inner panel and the door trim, the first space is used as an enclosure for the speaker unit, a second space that propagates sound from the second surface is provided between the outer panel and the inner panel, and the inner panel has a second opening for releasing sound from the second space into the space inside the passenger compartment.

According to the above aspect, the sound emitted from the second surface of the diaphragm into the second space is released into the space in the vehicle cabin through the second opening. On the other hand, since the first space, which uses the first surface of the diaphragm as a part of the wall surface, is sealed, the emission of the antiphase sound from the first surface into the space in the vehicle cabin is reduced. As a result, the bass reproduction capability can be improved compared to a configuration in which the sound from the first surface is emitted into the space in the vehicle cabin. In addition, since the first space is used as an enclosure for the speaker unit, the bass reproduction capability can also be improved in this respect. Moreover, since the enclosure is provided between the inner panel and the door trim, the workability of assembling the mechanism disposed between the outer panel and the inner panel can be improved compared to a configuration in which the enclosure is provided between the outer panel and the inner panel. This simplifies the assembly of the vehicle door, and as a result, the cost of the vehicle door can be reduced.

According to the above aspect, since the enclosure is provided between the inner panel and the door trim, the workability of assembling the mechanism disposed between the outer panel and the inner panel can be improved compared to a configuration in which the enclosure is provided between the outer panel and the inner panel. This simplifies the assembly of the vehicle door, and as a result, the cost of the vehicle door can be reduced. Here, the sound emitted from the second surface of the first space diaphragm to the second space is released into the space in the vehicle cabin through the second opening. Meanwhile, since the first space, which uses the first surface of the diaphragm as part of the wall surface, is sealed, the emission of the antiphase sound from the first surface into the space in the vehicle cabin is reduced. As a result, the bass reproduction capability can be improved compared to a configuration in which the sound from the first surface is released into the space in the vehicle cabin.

In the second aspect, which is a preferred example of the first aspect, the door trim is integrated with at least a portion of the enclosure. In the above aspect, the number of parts can be reduced and assembly can be simplified compared to a configuration in which the enclosure is separate from the door trim, etc.

In the third aspect, which is a preferred example of the second aspect, the enclosure has a wall portion surrounding the diaphragm when viewed in the vibration direction of the diaphragm. This aspect has the advantage that the first space can be easily sealed even if there is a service hole in the inner panel or a gap between the inner panel and the door trim that leads to the space inside the vehicle.

In the fourth aspect, which is a preferred example of any of the first to third aspects, the first space uses the inner panel as a wall surface. In the above aspect, the volume of the enclosure can be made larger than in a configuration in which the first space is formed using a member separate from the inner panel.

In the fifth aspect, which is a preferred example of the fourth aspect, the inner panel has a third opening that communicates with the second space, and a sealing member that closes the third opening is provided between the inner panel and the door trim. In the above aspect, communication between the first space and the second space through the third opening, such as a service hole, is prevented. This allows the inner panel to be used as a wall surface of the enclosure over a wide area, which results in a larger volume for the enclosure.

In the sixth embodiment, which is a preferred example of the fifth embodiment, the sealing member is a closed-cell foam. In the above embodiment, the closed-cell foam has excellent flexibility, so that the sealing member can be suitably attached to the inner panel even if the shape of the inner panel 4 is complex. Moreover, because the closed-cell foam does not have air permeability, communication between the first space and the second space through the third opening is suitably prevented.

In the seventh aspect, which is a preferred example of the fifth or sixth aspect, the door trim has a rib that presses the sealing member against the inner panel. In the above aspect, the adhesion between the sealing member and the inner panel can be improved.

In the eighth aspect, which is a preferred example of any of the first to seventh aspects, the speaker unit has a magnetic circuit for driving the diaphragm, and the magnetic circuit is disposed between the diaphragm and the outer panel. The above aspect has the advantage that it is easier to increase the volume of the enclosure compared to a configuration in which the magnetic circuit is disposed between the diaphragm and the door trim.

In a ninth aspect, which is a preferred example of any of the first to eighth aspects, the speaker unit is a subwoofer. In the above aspects, in a configuration in which the enclosure is provided between the inner panel and the door trim, it is easier to increase the volume of the enclosure compared to a configuration in which the enclosure is provided between the outer panel and the inner panel. For this reason, when a speaker unit for ultra-low frequency sounds such as a subwoofer is used in the configuration of the present disclosure, the effect of the present disclosure of improving low frequency reproduction capability is remarkable.

In the tenth aspect, which is a preferred example of any of the first to ninth aspects, a third space is provided between the inner panel and the door trim, which is in communication with the second space via the second opening, and the door trim has a fourth opening for releasing sound from the third space into the space within the vehicle cabin. In the above aspect, sound from the second opening can be efficiently released into the space within the vehicle cabin.

The vehicle according to the tenth preferred embodiment of the present invention includes a vehicle door according to any one of the above-mentioned embodiments. According to the above embodiment, the cost of the vehicle door can be reduced, thereby reducing the cost of the vehicle. In addition, since the vehicle door has excellent bass reproduction capabilities, excellent sound quality can be provided to the user inside the vehicle.

1...vehicle door, 1A...vehicle door, 1B...vehicle door, 2...outer panel, 3...door trim, 3A...door trim, 3B...door trim, 3a...opening (fourth opening), 3b...wall portion, 3c...wall portion, 3d...rib, 3e...wall portion, 4...inner panel, 4a...opening (first opening), 4b...opening (second opening), 4c...opening (third opening), 4d...hole, 4e...hole, 5...speaker unit, 5a...diaphragm, 5b...driver, 5b1...magnetic circuit, 5b2...voice coil, 5c...frame, 6...packing, 6A...packing, 7...window glass, 8...frame body, 9...connecting member, 10...screw, 11...sealing member, 20...enclosure, 20A...enclosure, 100...vehicle, 101L...door, 101R...door, 102L...door, 102R...door, 103...door, D...gap, FA...surface, FB...surface, S10...space (second space), S21...space (first space), S22...space (third space), SN...sound.

Claims (11)

An outer panel facing the exterior of the vehicle;
A door trim arranged on the passenger compartment side;
an inner panel disposed between the outer panel and the door trim and having a first opening;
a speaker unit disposed at the first opening and having a diaphragm;
The diaphragm has a first surface and a second surface facing in an opposite direction to the first surface,
A first space is provided between the inner panel and the door trim, and is sealed by using the first surface as a part of a wall surface,
The first space is used as an enclosure for the speaker unit,
A second space for propagating sound from the second surface is provided between the outer panel and the inner panel,
The inner panel has a second opening for emitting sound from the second space into a space within the vehicle cabin.
A vehicle door characterized by: The door trim is integral with at least a portion of the enclosure.
The vehicle door according to claim 1 . The enclosure has a wall portion surrounding the speaker unit when viewed in a vibration direction of the diaphragm.
The vehicle door according to claim 2. The first space uses the inner panel as a wall surface.
The vehicle door according to any one of claims 1 to 3. the inner panel has a third opening communicating with the second space,
a sealing member that closes the third opening is disposed between the inner panel and the door trim;
5. The vehicle door according to claim 4. The sealing member is a closed-cell foam.
The vehicle door according to claim 5. The door trim has a rib that presses the sealing member toward the inner panel.
7. A vehicle door according to claim 5 or 6. The speaker unit has a magnetic circuit for driving the diaphragm,
The magnetic circuit is disposed between the diaphragm and the outer panel.
The vehicle door according to any one of claims 1 to 7. The speaker unit is a subwoofer.
The vehicle door according to any one of claims 1 to 8. a third space communicating with the second space through the second opening is provided between the inner panel and the door trim,
The door trim has a fourth opening for discharging the sound from the third space into a space in the vehicle cabin.
The vehicle door according to any one of claims 1 to 9. A vehicle door comprising: a door for a vehicle according to any one of claims 1 to 10;
A vehicle characterized by:

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