JPH06273Y2 - Directional control device for automobile speakers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention controls the direction of a rotatable speaker arranged on a rear parcel shelf of an automobile so as to give an indirect sound or a direct sound to an occupant. It relates to the device.

[Prior Art] Conventionally, as a mounting structure of a speaker that can be switched to give an indirect sound or a direct sound to an occupant, a speaker box (actual exploitation Sho 54-166316) and a speaker system (actual exploitation Sho 49-95943). ) And a speaker device (Japanese Patent Laid-Open No. 57-116495).

In the speaker box, the speaker is mounted on the front plate of the rotating case rotatably supported in the opening of the fixed case, and the teeth of the ratchet mechanism are formed on the rear plate of the rotating case having an arcuate cross section. The fixed case at the rear of the opening is provided with a claw that can be engaged with or disengaged from the teeth of the ratchet mechanism.

In this speaker box, the pawl is disengaged from the teeth of the ratchet mechanism, the rotating case is rotated, and when the rotating case reaches a desired angle, the pawl is locked to the ratchet mechanism teeth so that the speaker faces upward. It is possible to change forward continuously and freely.

Further, in the above speaker system, the side surface is formed into a substantially isosceles triangular shape, and a mounting plate that pivotally supports the apex of the cabinet is rotatably formed with a hole that substantially matches the outer shape of the cabinet, and a locking device is mounted. The rotation of the cabinet with respect to the plate is prevented, and the speakers are attached to the upper plate and the front plate of the cabinet, respectively.

In this speaker system, the direction of the sound radiated from the speaker can be changed by rotating the cabinet, and by housing the cabinet below the mounting plate, the upper surface of the cabinet and the upper surface of the mounting plate are substantially the same. The space above the mounting plate can be effectively used.

Further, in the above speaker device, a tweeter speaker disposed in the interior of an automobile is configured to be capable of being diverted by a motor and a power transmission means, and a motor switch is provided by a control switch provided in a place away from the speaker device, that is, in a driver's seat or the like. It is configured to control rotation.

In this speaker device, the level of mid-high frequencies can be freely changed by remote operation from the driver's seat or the like according to the occupant's preference.

However, in the above speaker box and the above speaker system, the rotating case or cabinet must be manually rotated, and when the rotating case or cabinet is separated from the occupant, it reciprocates between the seat and the rotating case or cabinet. There was a problem that had to be solved.

Further, in the above-mentioned speaker system, there is a problem that a speaker must be attached to each of the top plate part and the front plate part of the cabinet, which raises the manufacturing cost. When the high-pitched speaker is attached to the mounting front plate, the high-pitched speaker is located below the mounting plate when the cabinet is contracted below the mounting plate.

Further, in the above speaker device, it is not necessary to go to the tweeter speaker each time in order to change the direction of the tweeter speaker, but only the occupant who operates the control switch can obtain a desired acoustic effect, and the other occupants are not affected. There is a problem that a good acoustic effect is not always obtained.

In order to eliminate these points, the adjusting means adjusts the sound volume of at least two speakers provided in the vehicle compartment, and the boarding detection means detects the boarding state of the left front seat and the rear seat, and the boarding detection is performed. An on-vehicle audio equipment control device has been proposed in which the control means is configured to adjust the volume of the at least two speakers based on the detection output of the means (Japanese Patent Laid-Open No. 58-53300).

In this control device, when the boarding detection means detects that the occupant is seated in the front seat and the rear seat on the left side, the control means adjusts the volume of the speaker based on the detected output and adjusts the sound image to the center in the vehicle width direction. When the passenger detection means detects that the occupant is not seated in the left front seat and rear seat, the control means positions the sound image on the driver seat side.

[Problems to be solved by the invention] However, in the above control device, in order to control the sound image to be located at the driver's seat side or in the center in the vehicle width direction, two or more speakers each having a built-in speaker at left and right positions are provided. However, there is a problem that the sound image cannot be controlled for a single speaker box as described above.

The purpose of the present invention is to eliminate a discomfort by giving a gentle indirect sound to the passenger in the rear seat when the passenger is seated in the rear seat, and to give a force to the passenger in the front seat when the passenger is not seated in the rear seat. There is a certain direct sound, and the indirect sound and the direct sound can be automatically switched depending on whether or not the occupant is seated in the rear seat, and it can be applied to a single speaker box with a built-in speaker. An object is to provide a direction control device for an automobile speaker.

[Means for Solving the Problems] In order to achieve the above object, the structure of the present invention will be described with reference to FIGS. 1 and 2 corresponding to the embodiment.

The present invention is arranged below the rear glass 24 which is tilted forward,
A speaker 13 is built-in, is rotatably attached to the periphery of an opening 11 provided in the rear parcel shelf 10 behind the rear seat, and can be retracted above or below the rear parcel shelf 10 through the opening 11. This is an improvement of the speaker box for automobiles.

The characteristic configuration is that the speaker box 14 has a speaker 13 on a predetermined single surface and is supported rotatably around a support shaft 12 provided at the front edge of the opening 11.
The speaker box 14 is rotated so that the sound emitted from the speaker is reflected by the rear glass 24 and is switched to the first position facing the front seat and the sound emitted from the speaker 13 is switched to the second position facing the front seat. An actuator 16 is provided below the rear parcel shelf 10, and a seat switch 25 for detecting whether or not an occupant is seated is provided in the rear seat.
Based on the detection output of the seat switch 25, the orientation of the speaker 13 is switched to the first position when the passenger is seated in the rear seat, and the orientation of the speaker 13 is switched to the second position when the passenger is not seated in the rear seat. Is provided with a control circuit for controlling the actuator 16.

[Action]

When the seat switch 25 detects that the occupant is seated in the rear seat, the control circuit drives the actuator 16 based on the detected output, and the speaker box 14 is stored under the rear parcel shelf 10 as shown in FIG. That is, the sound emitted from the speaker 13 is reflected by the rear glass 24 and the speaker box 14 is rotated to the first position toward the front seat.

When the seat switch 25 detects that the passenger is not seated in the rear seat, the control circuit projects the speaker box 14 above the rear parcel shelf 10 as shown in FIG. The speaker box 14 is rotated to the second position where the sound is directly directed to the front seat.

[Embodiment] Next, an embodiment of the present invention will be described in detail.

As shown in FIGS. 1 and 2, the rear parcel shelf 10 is located substantially horizontally behind the seat back of the rear seat of the passenger car.
Is provided. The lower end of the rear glass 24 is located near the rear end of the rear parcel shelf 10. Rear glass 2
4 is tilted forward so as to cover above the rear parcel shelf 10, and the upper end of this glass 24 is connected to the rear end of the roof panel via a weather strip.

An opening 11 is provided in the rear parcel shelf 10. A support shaft 12 is mounted on the front edge of the opening 11 of the rear parcel shelf 10. A speaker 13 is attached to the spindle 12.
A speaker box 14 having a built-in speaker is attached. The speaker box 14 has a speaker 13 on a predetermined single surface of the box 14. In the speaker box 14, the sound radiated from the speaker 13 is reflected by the rear glass 24 to face the front seat (FIG. 1), and the sound radiated from the speaker 13 is directly directed to the front seat. It is configured so as to be rotatable around the support shaft 12 between the position (FIG. 2).

The rear parcel shelf 10 is provided with upper and lower stoppers (not shown) that stop the rotation of the speaker box 14 at the first position and the second position, respectively. A pulley 15 is fixed to the end of the support shaft 12, and a reversible motor 16 which is an actuator is provided below the rear parcel shelf 10. The rotation of the motor 16 is the belt 1
It is transmitted to the pulley 15 via 7.

As shown in FIG. 3, the control circuit for controlling the reversible motor 16 includes an overload stop circuit 20, a relay 21, and a selection switch 22, and the reversible motor 16 has an overload stop circuit 2.
0, the relay 21, and the selection switch 22 are connected to the battery 23. The selection switch 22 includes two movable switching pieces a and b and fixed contacts c, d, e and f. The fixed contacts c and f are connected to the battery 23, and the fixed contact d
And e are grounded. The selection switch 22 is configured such that when the switching pieces a and b are switched to the contacts c and d, respectively, the motor 16 rotates in the forward direction, and when the switching pieces are switched to the contacts e and f, respectively, the motor 16 is rotated in the reverse direction.

Further, the rear seat is provided with a seat switch 25 which is turned on when an occupant is seated in the rear seat and is turned off when the occupant is not seated. The output of the seat switch 25 provides a switching piece a of the selection switch 22. And b are switch-controlled. One contact point g of the seat switch 25 is connected to the battery 23, and the other contact point h is connected to the switching control input of the selection switch 22.

In the vehicle speaker directional control device configured as described above, when the occupant is seated in the rear seat, the seat switch 25 is turned on, so that the switching pieces a and b of the selection switch 22 of the control circuit are connected to the contact points e and b. The motor 16 is reversely rotated by switching to f, and the speaker box 14 is housed below the rear parcel shelf 10 as shown in FIG. That is, since the speaker box 14 rotates to the first position and then stops, the occupant hears an indirect sound whose volume is reduced by being reflected by the rear glass 24.

Further, when the occupant is not seated in the rear seat, the seat switch 25 is turned off, so that the switching pieces a and b of the selection switch 22 of the control circuit are switched to the contacts c and d, respectively, and the motor 16 is normally rotated. As shown in FIG. 2, the speaker box 14 projects above the rear parcel shelf 10. That is, the speaker box 14 rotates to the second position and stops, so that the occupant at the front seat can hear a powerful direct sound.

When the speaker box 14 contacts the upper or lower stopper (not shown), the overload stop circuit 20 causes the motor 16 to operate.
Stops at a predetermined position above or below the rear parcel shelf 10.

In the above example, the reversible point motor 16 is used as the actuator 16 that moves the speaker box 14 above or below the rear parcel shelf 10.
The actuator is not limited to this, but may be a solenoid, an air cylinder, or the like.

[Advantages of the Invention] As described above, according to the present invention, the control circuit controls the actuator based on the detection output of the seat switch provided in the rear seat, so that the sound emitted from the speaker 13 is transmitted to the rear glass. The speaker box can be automatically rotated between the first position where the sound is emitted from the speaker 13 and the second position where the sound emitted from the speaker 13 is directly reflected toward the front seat. As a result, when the occupant is seated in the rear seat, only the indirect sound reflected on the rear glass is heard, and thereby the passenger in the rear seat is prevented from hearing an excessive speaker sound, which does not cause discomfort. Further, when the passenger is not seated in the rear seat, the passenger in the front seat can enjoy a powerful direct sound from the speaker.

Further, in the conventional speaker box, speaker system, and speaker device, the occupant had to operate the rotating case, cabinet, control switch, etc., whereas in the present invention, the speaker box automatically rotates. Therefore, the occupant's operation as described above is not necessary and there is no trouble.

Further, in the conventional speaker system, mounting the speakers on the top plate and the front plate of the cabinet increases the manufacturing cost, or mounting the speaker for mid-low range on the top plate and mounting the speaker for high range on the front plate causes the cabinet to rise. When the vehicle is stored under the mounting plate, the treble from the high-frequency speaker located below the cabinet cannot be heard by the occupants, whereas the present invention has a speaker on a predetermined single surface of the speaker box. The speaker is not hidden below the rear parcel shelf due to the rotation of the speaker box.

Further, in the conventional on-vehicle audio equipment control device, in order to control the sound image to be positioned at the driver's seat side or the center in the vehicle width direction, two or more speaker boxes each having a speaker are provided at left and right positions. However, the present invention can be applied to a single speaker box with a built-in speaker.

[Brief description of drawings]

1 and 2 are cross-sectional views showing a speaker direction control device according to an embodiment of the present invention. FIG. 3 is a control circuit diagram including a seat switch. 10: rear parcel shelf, 11: opening, 12: support shaft, 13: speaker, 14: speaker box, 16:
Reversible motor (actuator), 24: rear glass,
25: Sheet switch.

Claims (1)

[Scope of utility model registration request] 1. A rear glass (24) which is tilted forward, is arranged below a rear glass (24), has a built-in speaker (13), and is provided at the periphery of an opening (11) provided in a rear parcel shelf (10) at the rear of a rear seat. A speaker box for an automobile, which is rotatably attached and is configured to be capable of appearing above and below a rear parcel shelf (10) through the opening (11), wherein the speaker box (14) has a predetermined single surface. Speaker (1
3) is rotatably supported around a support shaft (12) provided at the front edge of the opening (11), and the sound emitted from the speaker (13) is the rear glass.
The first position toward the front seat, which is reflected by (24), and the speaker (1
An actuator (16) for rotating the speaker box (14) is provided below the rear parcel shelf (10) so that the sound radiated from 3) is switched to the second position directly facing the front seat. A seat switch (25) for detecting whether or not a passenger is seated is provided in the rear seat, and the speaker (13) when the passenger is seated in the rear seat based on the detection output of the seat switch (25). And a control circuit for controlling the actuator (16) so that the direction of the speaker (13) is switched to the second position when the passenger is not seated in the rear seat. A direction control device for an automobile speaker characterized by the following.