JPH0558497U - Automotive roof speaker device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a roof speaker device 20 that does not become an obstacle when getting on and off and has a good acoustic effect. [Structure] A roof speaker 22 is mounted in a storage recess 14 provided in a vehicle body roof 11 so as to be able to be taken in and out between a storage position in which a speaker surface is substantially parallel to the vehicle body roof 11 and a use position in which the speaker surface is inclined rearward. , A drive mechanism 30 for inserting and removing the speaker 22 is provided, and based on an output signal of a sensor 44 for detecting opening and closing of the entry / exit door,
There is provided control means 40 for controlling the drive mechanism 30 so that the roof speaker 22 is set to the storage position when the door for getting on and off is opened.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a vehicle-mounted roof speaker device.

[0002]

[Prior Art]

 Generally, as shown in FIG. 4, a roof speaker 10 for a radio of a medium-sized bus has a speaker surface in a storage recess 14 provided between a roof outer plate 12 and a roof lining 13 that form a vehicle body roof 11. It is installed in parallel with.

[0003]

[Problems to be solved by the device]

 By the way, as shown in FIG. 4, when the speaker surface is substantially parallel to the roof 11, the sound reverberates above the head, which gives the occupant a feeling of pressure. On the other hand, if the roof speaker 10 is attached so that the speaker surface faces the rear of the passenger compartment as shown by the chain double-dashed line in FIG. 4, the occupants can hear the sound coming from the front, so The sound effect is improved.

However, since the indoor height from the floor to the roof lining 13 of a medium-sized bus is set to be approximately the same as the average height of an adult male, if the roof speaker 10 is mounted rearward, it will be exposed to the indoor side. The amount of overhang becomes large and becomes an overhead obstacle when getting on and off. The present invention has been made in view of the above problems, and an object of the present invention is to provide a roof speaker device that does not become an obstacle when getting on and off and has a good acoustic effect.

[0005]

[Means for Solving the Problems]

 The roof speaker system for a vehicle according to the present invention is arranged such that the roof speaker is inserted into and retracted from the storage position where the speaker surface is substantially parallel to the vehicle body roof and the use position where the speaker surface is inclined rearward in the storage recess provided in the vehicle body roof. The roof speaker is installed in the storage position when the door is open based on the output signal of the sensor that detects the opening and closing of the door for loading and unloading. A control means for controlling the drive mechanism so as to be set is provided.

[0006]

[Operation and effect of the device]

 According to the present invention, the speaker surface of the roof speaker faces rearward in the use position, so that the occupant can hear the sound coming from the front. Therefore, the acoustic effect is improved. When the door for entry and exit is open, the roof speaker is stored in the storage recess, and the speaker surface is substantially parallel to the roof. Therefore, it is safe because the speaker does not become an overhead obstacle when moving inside the vehicle by opening the door for getting on and off.

[0007]

【Example】

 The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a vehicle-mounted roof speaker device 20 according to an embodiment of the present invention. The device 20 includes a speaker mounting plate 21 having a flat box shape, a roof speaker main body 22 having a speaker surface fixed to an opening provided at the bottom of the plate 21, and a driving mechanism 30. The speaker mounting plate 21 is attached to a storage recess 14 provided between the outer plate 12 and the inner lining 13 of the vehicle body roof 11, and the speaker mounting plate 21 has a storage position in which the speaker surface is substantially parallel to the vehicle body roof 11 as shown by the solid line in FIG. Insert the hinge pipe 24 and the same pipe 24 into the bracket 23 where both left and right sides are welded and fixed to the outer plate so that it can be taken in and out between the use positions that are inclined rearward as shown by the chain double-dashed line. The bolt 25 and the nut 26 are assembled so as to be rotatable in the vertical direction.

The drive mechanism 30 is integrally provided with a guide bracket 31 fixed to the bottom of the speaker mounting plate 21, a socket 32 slidably attached to the guide bracket 31 in the front-rear direction, and a ball 33 a fitted to the socket 32. Rotation of the screw shaft 33, the cylindrical nut member 34 screwed to the screw shaft 33, the worm wheel 35 fitted to the member 34 so as to rotate integrally with the nut member 34, the motor 36, and the motor 36. The worm 37 is connected to the shaft and meshes with the worm wheel 35. The nut member 34 is rotatably mounted on a bracket 38 fixed to the outer plate 12 via a bearing 39 so that the screw shaft 33 can be screwed up and down. The motor 36 is fixed to the bracket 38.

The drive mechanism has such a configuration. When the motor 36 is driven in the normal direction, the worm wheel and the nut member rotate integrally, so that the screw shaft 33 is screwed downward and the socket 32 is moved along the guide bracket 31. Advance. Along with this, the speaker mounting plate 21 rotates downward about the hinge pipe 24 as a fulcrum. On the other hand, when the motor 36 is driven in the reverse direction, the speaker mounting plate 21 rotates upward.

The forward / reverse driving of the motor 36 is controlled by the control means 40 having the circuit configuration shown in FIG. The control means 40 includes a NAND circuit 41 having three non-inverting input terminals 41a, 41b and 41c, and a NOR circuit 42 having two inverting input terminals 42a and 42b and one non-inverting input terminal 42c. .. An audio switch 43 is connected to the non-input terminal 41a of the NAND circuit, and a door switch 44 is connected to the input terminal 41b. Further, one fixed contact 45a of the speaker operating switch 45 is connected to the input terminal 41c of the NAND circuit 41. The audio switch 43 is connected to the inverting input terminal 42a of the NOR circuit 42, and the other fixed contact 45b of the speaker operating switch 45 is connected to the non-inverting input terminal 42c. A door switch 44 is connected to the inverting input terminal 42b of the NOR circuit 42.

The audio switch 43 also serves as a power switch of the vehicle audio device. When the switch 43 is turned on, the audio device is connected to the power battery 47 via the engine key switch 46. The speaker operation switch 45 is operated when the roof speaker 22 is put in and out of the storage recess 14, and when the speaker 22 is put out of the storage recess, it is switched to the fixed contact side 45a, and when it is put in the storage recess, the fixed contact 45b side. Switch to. The audio switch 43 and the speaker operation switch 45 are connected in parallel with the engine key switch 46. The door switch 44 is provided to detect the opening and closing of the vehicle entrance / exit door, and is installed near the door so that the door switch 44 turns on when the passenger door opens and closes when the door closes. The movable contact side is grounded.

The output terminal of the NAND circuit 41 is connected to the relay coil 49a of the relay switch 49 via the limit switch 48, and the output terminal of the NOR circuit 42 is connected to the relay coil 51a of the relay switch 51 via the limit switch 50. Is connected. One fixed contact 49a, 51a of the relay switch 49 and the relay switch 51 is connected to the power supply battery 47, and the other fixed contact 49c, 51c is grounded. The movable contacts of the relay switches 49 and 51 are connected to the motor 36, respectively. The limit switch 48 is turned off when the roof speaker 22 is installed in the use position, and the limit switch 50 is turned off when the speaker 22 is installed in the retracted position. It is arranged in the rotation area.

The present embodiment has the above configuration, and its operation will be described below. To bring the roof speaker 22 in the storage position to the use position, first close the door for getting on and off. As a result, the door switch 44 is turned off, so that the engine key switch 46 and the audio switch 43 are turned on next, and then the speaker operating switch 45 is switched to the fixed contact 45a side. As a result, an H level signal is applied to all of the non-inverting input terminals 41a, 41b, 41c of the NAND circuit 41. At this time, the roof speaker 22 is not in the use position and the limit switch 48 is turned on. Therefore, the output terminal of the NAND circuit 41 becomes L level and the relay coil 49a is energized. Switch to the 49b side. As a result, since the motor 36 is energized in the normal direction, the motor 36 rotates normally and the speaker mounting plate 21 rotates downward. When the roof speaker mounting plate 21 moves a predetermined amount, the limit switch 48 is turned off and the relay coil 49a is cut off from the power supply battery 47, so that the relay switch 49 is switched to the fixed contact 49c side and the motor 36 and the power supply are connected. The battery 47 is shut off. Therefore, the motor 36 is stopped and the roof speaker 22 is set to the use position.

Subsequently, in order to store the roof speaker 22 in the use position, the speaker operation switch 45 is switched to the fixed contact 45b side. Then, an H level signal is applied to the non-inverting input terminal 42c of the NOR circuit 42, so that an L level signal is output from the output terminal of the circuit 42. As a result, the relay coil 51a is energized, and the relay switch 51 is switched to the fixed contact 51b side. As a result, the motor 36 is energized in the reverse direction, so that the motor 36 rotates in reverse and the speaker mounting plate 21 rotates upward. When the speaker mounting plate 21 rotates a predetermined amount, the limit switch 50 is turned off and the relay coil 51a is disconnected from the power supply battery 47, so that the motor 36 is stopped and the roof speaker 22 is set to the retracted position. It

Further, when the door for opening / closing is opened when the roof speaker 22 is in the use position, the door switch 44 is turned on and an L level signal is applied to the inverting input terminal 42b of the NOR circuit 42. Therefore, the output signal of the circuit 42 becomes L level and the relay coil 51a is energized, and the motor 36 rotates in the reverse direction. At this time, an L level signal from the door switch 44 is applied to the non-inverting input terminal 41b of the NAND circuit 41, so that the output signal of the circuit 41 becomes H level, and the energization of the relay coil 49a is blocked. In this way, when the entry / exit door is opened, the motor 36 rotates in the reverse direction, so that the roof speaker 22 in the use position is automatically stored. Similarly, when the engine key switch 46 is turned off or the audio switch 43 is turned off, the motor 36 is rotated in reverse, so that the roof speaker 22 is retracted from the use position to the storage position.

According to the present embodiment, however, the speaker surface of the roof speaker 22 faces rearward in the use position, so that the occupant can hear the sound coming from the front. Therefore, the acoustic effect is improved. Further, when the door for getting on and off is opened, the roof speaker 22 is automatically stored in the storage recess 14, and the speaker surface becomes substantially parallel to the roof 11. Therefore, it is safe because the speaker 22 does not become an overhead obstacle when moving inside the vehicle by opening the door for getting on and off.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a vehicle-mounted roof speaker device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an electric circuit diagram of a control means that constitutes the device.

FIG. 4 is a sectional view showing a conventional vehicle-mounted roof speaker.

[Explanation of symbols]

11 ... Body roof, 12 ... Roof outer plate, 13 ... Roof lining, 14 ... Storage recess, 20 ... Vehicle roof speaker device, 21 ... Roof speaker mounting plate, 22 ... Roof speaker, 23 ... Bracket, 24 ... Hinge pipe Three
0 ... Drive mechanism, 31 ... Guide bracket, 32 ... Socket, 33 ... Screw shaft, 34 ... Nut member, 3
5 ... Worm wheel, 36 ... Motor, 37 ... Worm, 38 ... Bracket, 39 ... Bearing, 40 ... Control means,
41 ... NAND circuit, 42 ... NOR circuit, 43 ... Audio switch, 44 ... Door switch, 45 ... Speaker operation switch, 46 ... Engine key switch, 48 ... Limit switch, 49 ... Relay switch, 50 ... Limit switch, 51 ... Relay switch.

Claims (1)

[Scope of utility model registration request] 1. A roof speaker is mounted in a storage recess provided in a vehicle body roof so as to be able to be taken in and out between a storage position where the speaker surface is substantially parallel to the vehicle body roof and a use position where the speaker surface is inclined rearward. The driving mechanism is provided so that the roof speaker is set to the storage position when the door is open based on the output signal of the sensor that detects the opening / closing of the door for opening / closing the speaker. An on-vehicle roof speaker device comprising control means for controlling.