JP7077775B2 - Vehicle back doors, vehicle warning systems and vehicle warning methods - Google Patents

Description

The present invention relates to a vehicle back door. The present invention also relates to a vehicle warning system and a vehicle warning method.

A support system configured to emit a warning sound from a speaker installed near the driver's seat when a sensor installed at the rear of the vehicle detects an obstacle behind the vehicle while the shift shift lever of the vehicle is set to reverse. Is disclosed in Patent Document 1.

Japanese Unexamined Patent Publication No. 2000-177512

However, in such a rear obstacle detection and warning system, it is preferable to generate a warning sound from the rear of the vehicle interior, not from near the driver's seat. This is because it is easy for the front seat occupants (particularly the driver) to intuitively understand that there is a danger of a collision on the rear side.

However, in order to arrange the speaker that emits the horn sound at the rear of the vehicle, a member that supports the speaker is required. If such a support member is newly provided, many parts other than the speaker are required. Further, in order to ensure that the driver at the front of the vehicle can hear and confirm the warning sound generated at the rear of the vehicle, it is necessary to give sufficient consideration to the position and direction of the speakers.

Therefore, the present invention has been made to solve such a problem, and is a vehicle back door in which a speaker is attached to a rear wiper motor bracket of the back door, a vehicle warning system using the vehicle back door, and a vehicle warning system. It provides a warning method for vehicles.

Specifically, the embodiment according to claim 1 is
The back door body for vehicles and
The back door glass attached to the back door body and
The bracket fixed to the center of the back door body in the vehicle width direction,
The motor fixed to the bracket and
The wiper drive shaft driven and connected to the motor,
In a vehicle back door equipped with a wiper attached to the wiper drive shaft,
The bracket is provided with a speaker support.
The speaker is supported by the speaker support portion.

According to the vehicle back door according to the first aspect, a speaker support portion is provided on a bracket for supporting the motor for driving the wiper, and the speaker is supported therein. Therefore, when mounting the speaker on the back door, it is not necessary to significantly change the existing configuration (for example, the wiper drive unit).

In the vehicle back door according to claim 2, the motor is arranged in either the left side or the right side of the wiper drive shaft in the vehicle width direction, and the left side or the right side of the other area. It is characterized in that the speaker is arranged in.

According to the vehicle back door according to the second embodiment, it is possible to avoid interference between the wiper drive motor and the speaker. In addition, the left and right weights can be balanced across the wiper drive shaft.

In the vehicle back door according to the third aspect, the speaker has a state in which the angle of the central axis of the speaker with respect to the vehicle height direction axis is smaller than the inclination angle of the back door glass with respect to the vehicle height direction axis. , It is characterized in that it is fixed to the bracket.

According to the vehicle back door according to the third embodiment, the sound emitted by the speaker is reflected on the back door glass and sent to the front of the vehicle interior, so that the front seat occupant can surely hear the warning sound from the rear speaker. Can be recognized.

The vehicle back door according to claim 4 is characterized in that the speaker is fixed to the bracket with the central axis of the speaker facing the back door glass.

According to the vehicle back door according to the fourth embodiment, the sound emitted by the speaker is reflected on the back door glass and sent to the front of the vehicle interior, so that the front seat occupant reliably hears a warning sound or the like from the rear speaker. Can be recognized.

The vehicle back door according to claim 5 is characterized in that the speaker is arranged so that the sound reflected by the back door glass is directed above the horizontal plane.

According to the vehicle back door according to the fifth aspect, the sound reflected by the back door glass is directed above the horizontal plane, so that the sound emitted by the speaker is reliably transmitted to the front seat occupants beyond the rear seats. Will be done. Therefore, the driver can reliably recognize the sound coming from behind.

In the vehicle warning system according to the sixth embodiment, which detects an obstacle behind the vehicle and emits a warning sound.
The vehicle is provided with the vehicle back door according to any one of claims 1 to 5.
The vehicle warning system is
A detector that detects obstacles behind the vehicle,
It is characterized by including a control unit that drives the speaker and emits a warning sound when the distance between the obstacle and the vehicle is equal to or less than a predetermined value.

According to the vehicle warning system according to the sixth aspect, the sound emitted by the speaker is reflected by the back door glass and sent to the front of the vehicle interior. Therefore, the driver recognizes the sound emitted by the speaker as the sound coming from the rear and recognizes the existence of the rear obstacle.

The vehicle warning method according to the seventh embodiment, which detects an obstacle behind the vehicle and emits a warning sound from a speaker, is the same as the vehicle warning method.
The vehicle is provided with the vehicle back door according to any one of claims 1 to 5.
When the distance between the vehicle and the obstacle is equal to or less than a predetermined value, the speaker is driven to emit a warning sound.

According to the vehicle warning method of the embodiment according to claim 7, the sound emitted by the speaker is reflected by the back door glass and sent to the front of the vehicle interior. Therefore, the driver recognizes the sound emitted by the speaker as the sound coming from the rear and recognizes the existence of the rear obstacle.

As described above, according to the embodiment of the present invention, when the speaker is attached to the back door, it is not necessary to provide a new configuration, and it is not necessary to significantly change the existing configuration (for example, the wire drive unit).

It is a vertical sectional view of the back door for a vehicle. It is a figure which shows the structure of the back door main body of the vehicle back door shown in FIG. 1 and seen from the vehicle interior side. FIG. 2 is a schematic view of the inner panel as viewed from the front of the vehicle, showing the arrangement position of the speaker with the back door trim removed from the back door main body shown in FIG. 2. It is an enlarged view of the rear wiper motor bracket shown in FIG. It is the schematic which looked at the rear wiper motor bracket shown in FIG. 4 from the direction A. It is sectional drawing explaining the direction in which the sound emitted from a speaker travels. It is a figure which shows the structure of the warning system for a vehicle including a speaker. It is a block diagram which shows the structure of the warning system for a vehicle shown in FIG. 7. It is a flowchart explaining the operation of the warning system for a vehicle shown in FIGS. 7 and 8.

Hereinafter, embodiments of a vehicle back door, a vehicle warning system, and a vehicle warning method according to the present invention will be described.

(1) Vehicle back door FIGS. 1 and 2 show the rear structure of the vehicle 2, particularly the structure of the flip-up back door 4. A rear seat 6 is arranged in front of the back door 4, and a luggage compartment 10 forming a part of the vehicle interior 8 is formed between the back door 4 and the rear seat 6.

The present invention is not limited to the flip-up type back door. As is well known, as the opening / closing method of the back door 4, a flip-up method, a single-opening method, and a double-opening method are known, and the present invention can be similarly applied to the single-opening method and the double-opening method.

The back door 4 of the embodiment is provided with a hinge mechanism (not shown) at the upper end of the back door 4 and the corresponding vehicle body portion, and the back door 4 is flipped up (opened and closed) with respect to the vehicle body by this hinge mechanism. ) It is possible. Further, a latch mechanism (not shown) is provided on the vehicle body portion corresponding to the lower end of the back door 4, and the back door 4 can be locked to the vehicle body by this latch mechanism.

The back door 4 has a back door main body 12. The back door main body 12 includes a back door main body upper portion 14 and a back door main body lower portion 16. The upper portion 14 of the back door main body is provided with a window opening 18, and a back door glass (rear window glass) 20 is attached to the window opening 18. In the embodiment, the window opening 18 is formed so that the back door glass 20 attached thereto is directed diagonally upward from the rear to the front. In the embodiment, as shown in FIG. 1, the back door glass 20 is slightly curved from the inside to the outside of the passenger compartment 8.

As shown in FIG. 1, the back door main body 12 has an inner inner panel 22 on the inner side and an outer panel 24 on the outer side. In the embodiment, the reinforcing panel 26 is arranged between the inner panel 22 and the outer panel 24 in the lower portion 16 of the back door main body. Further, a back door trim 28 is provided inside the inner panel 22.

The back door trim 28 has an upper horizontal portion 30 extending from the vicinity of the window opening 18 toward the front on the vehicle interior side, a vertical portion 32 extending downward from the front end of the upper horizontal portion 30, and a lower end of the vertical portion 32. It has a lower horizontal portion 34 extending rearward. As shown in the figure, in the embodiment, the upper horizontal portion 30 is inclined diagonally downward and forward from the vicinity of the window opening 18.

A speaker opening 36 is formed near the center of the upper horizontal portion 30 of the back door trim in the vehicle width direction, and the speaker 38 is arranged in the speaker opening 36.

Explaining in detail with reference to FIG. 3, the speaker 38 is attached to a rear wiper motor bracket (hereinafter referred to as “bracket”) 40 which is located below the back door glass 20 and is fixed to the central portion in the vehicle width direction. .. The central portion in the vehicle width direction includes not only the central position in the vehicle width direction but also a region in the vicinity thereof. In an embodiment, the bracket 40 is a suitable means (eg, bolt) at the left and right fastening points 42, 44 located on both sides in the vehicle width direction and the central fastening point 46 located between these fastening points 42, 44. It is fixed to the inner panel 22 by.

Explaining in detail with reference to FIGS. 4 and 5, the bracket 40 supports the wiper drive unit 47. The wiper drive unit 47 includes a motor 48, a gear box 50 having a built-in gear mechanism (not shown), and a wiper drive shaft 52, and the rotation of the motor 48 is performed via the gear mechanism in the gear box 50. It is configured to be transmitted by the drive shaft 52, and the wiper drive shaft 52 rotates forward and reverse within a range of a predetermined angle based on the drive of the motor 48. The wiper drive shaft 52 penetrates the back door main body 12 or the back door glass 20 and protrudes outside the vehicle interior, and a rear wiper 53 (see FIG. 3) is attached to the protruding portion.

In the embodiment, when viewed from the inside to the outside of the vehicle interior, the motor 48 and the gearbox 50 are arranged on the left side of the wiper drive shaft 52, and the speaker 38 is arranged on the right side of the wiper drive shaft 52. ing. Therefore, the motor 48 and the speaker 38 do not interfere with each other, and the left and right weights can be balanced. Further, since the bracket 40 is fixed to the inner panel 22 at the left and right fastening points 42 and 44 and the central fastening point 46, the vibration of the motor 48 is not amplified by the bracket 40.

As shown in FIG. 4, the appearance of the speaker 38 is composed of an upper structure 54 and a lower structure 56. The superstructure 54 has a diaphragm 58 and a frame 60 surrounding the diaphragm 58. Substructure 56 includes coils, magnets, and yokes (none of which are shown). In the embodiment, an annular flange 62 for attaching the speaker 38 to the bracket 40 is fixed to the speaker 38 near the boundary between the upper structure 54 and the lower structure 56.

On the other hand, in the bracket 40, the speaker support portion 64 that supports the speaker 38 is formed with a hole or a bay-shaped notch having a size and shape corresponding to the outer shape of the speaker lower structure 56, and this hole or bay is formed. The speaker 38 is fixed to the bracket 40 by fitting the lower structure 56 into the shape notch and connecting the annular flange 62 to the bracket 40 with bolts 66.

Explaining the posture (particularly orientation) of the speaker 38, as shown in FIG. 1, the speaker 38 is oriented so that the vibration direction of the diaphragm 58, that is, the central axis of the speaker 38 diagonally hits the back door glass 20. Has been done.

Explaining in detail with reference to FIG. 6, on the vertical cross section in the vehicle front-rear direction, the intersection angle between the vehicle height axis (vertical axis) 68 and the speaker center axis 70 is α1, and the speaker center axis 70 corresponds to the back door glass 20. Assuming that the intersection angle between the back door glass tangent line 74 and the vehicle height direction axis 68 at the point 72 is α2, the speaker 38 is set for the back door glass 20 so as to satisfy the relationship of α1 <α2.

Hereinafter, with respect to the direction of the sound emitted by the speaker 38, the “direction” of the sound means the direction of the sound traveling along the central axis 70 of the speaker. When the sound emitted by the speaker 38 is reflected by an object (specifically, the back door glass 20) and the direction is changed, the sound incident on the object with an incident angle along the center axis 70 of the speaker is reflected at the same angle as the incident angle. The direction in which the sound reflected from an object with an angle travels is referred to as a speaker central axis, and the reflected speaker central axis is indicated by reference numeral 71 in FIG.

According to this embodiment, for example, α1 is set to 27 degrees and α2 is set to 57 degrees. Therefore, the sound emitted by the speaker 38, particularly the portion having the highest sound pressure level traveling along the central axis 70, hits the back door glass 20 and then moves forward with an ascending angle of about +3 degrees with respect to the horizontal plane 76. move on. As a result, the reflected sound travels forward along the central axis of the speaker indicated by reference numeral 71 in FIG. 6 over the rear seat 6. Therefore, the driver in front of the vehicle compartment 8 can clearly hear the sound sent from the rear of the vehicle.

(2) Warning system FIGS. 7 and 8 show the configuration of the warning system 80 according to the present invention. The warning system 80 of the illustrated embodiment includes the speaker 38 described above, a shift sensor 82 for detecting that the shift range is set to reverse, and one or more obstacle detection sensors 84 present at the rear of the vehicle body. The controller 86 is electrically connected to the shift sensor 82 and the obstacle detection sensor 84. The obstacle detection sensor 84 may be any type of sensor as long as it can detect the presence or absence of a rear obstacle or the distance between the vehicle and the rear obstacle.

According to the warning system 80 configured in this way, as shown in FIG. 9, the controller 86 receives the output of the shift sensor 82 (step S1) and determines whether or not the shift is set to the reverse range. (Step S2). When the shift is set to the reverse range, the controller 86 receives the output of the obstacle detection sensor 84 (step S3), determines the presence or absence of an obstacle (step S4), and if there is an obstacle, the obstacle. It is determined whether or not the distance (D) between the vehicle and the vehicle is equal to or less than a predetermined threshold value (Dt) (step S5), and if the distance (D) is equal to or less than the threshold value (Dt), the speaker 36 is driven to give a predetermined warning. Make a sound (step S6). As described above, the warning sound from the speaker 36 is reflected by the back door glass 20 and sent to the front of the vehicle interior. Therefore, the driver can intuitively recognize that there is an obstacle in the rear by listening to the warning sound transmitted from the rear.

4: Back door 12: Back door body 20: Back door glass 38: Speaker 40: Rear wiper motor bracket 47: Wiper drive unit 48: Motor 52: Wiper drive shaft 53: Wiper 64: Speaker support portion 68: Vehicle height direction axis 70 : Speaker central axis

Claims (7)

The back door body for vehicles and
The back door glass attached to the back door body and
The bracket fixed to the center of the back door body in the vehicle width direction,
The motor fixed to the bracket and
The wiper drive shaft driven and connected to the motor,
In a vehicle back door equipped with a wiper attached to the wiper drive shaft,
The bracket is provided with a speaker support.
A vehicle back door characterized in that a speaker is supported by the speaker support portion. The claim is characterized in that the motor is arranged in one of the left and right regions of the wiper drive shaft in the vehicle width direction, and the speaker is arranged in either the left or right region of the wiper drive shaft. Item 1. The vehicle back door according to item 1. The speaker is characterized in that the angle of the central axis of the speaker with respect to the vehicle height direction axis is smaller than the inclination angle of the back door glass with respect to the vehicle height direction axis, and is fixed to the bracket. The vehicle back door according to claim 1 or 2. The vehicle back door according to claim 1 or 2, wherein the speaker is fixed to the bracket in a state where the central axis of the speaker is directed to the back door glass. The vehicle back door according to any one of claims 1 to 4, wherein the speaker is arranged so that the sound reflected by the back door glass is directed above the horizontal plane. It is a warning system for vehicles that detects obstacles behind the vehicle and emits a warning sound.
The vehicle is provided with the vehicle back door according to any one of claims 1 to 5.
The vehicle warning system is
A detector that detects obstacles behind the vehicle,
A vehicle warning system comprising a control unit that drives the speaker to emit a warning sound when the distance between the obstacle and the vehicle is equal to or less than a predetermined value. It is a warning method for vehicles that detects obstacles behind the vehicle and emits a warning sound from the speaker.
The vehicle is provided with the vehicle back door according to any one of claims 1 to 5.
A vehicle warning method, characterized in that when the distance between the vehicle and the obstacle is equal to or less than a predetermined value, the speaker is driven to emit a warning sound.

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