JPS5848861Y2 - Automotive speaker rotation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating device for an automobile speaker.

Speakers are installed in public relations vehicles, fire command vehicles, patrol cars, etc., but conventionally speakers are fixedly attached to the vehicle body, so if the speakers are installed facing forward, for example, they will only amplify the sound to the front. It becomes clear,
Amplifying the sound □ in other directions was difficult.

In particular, when it becomes necessary to amplify the sound to the rear after entering a narrow road such as an open field, or when it becomes necessary to amplify the sound to the side or rear while driving, it is difficult to amplify the sound in the necessary direction. Therefore, there was a risk that the objectives of public relations activities etc. could not be achieved.

In view of the above-mentioned current situation, the present invention aims to provide an automobile speaker rotation device that can rotate the speaker with a simple operation and sufficiently amplify the sound in the required direction.

The configuration of the present invention will be described below with reference to the embodiments shown in the drawings.

In Fig. 1, 1 is the body of a vehicle such as a public information vehicle, fire department vehicle, or patrol car, 2 is a mounting member fixed to the vehicle body 1, and 3 is a rotary member rotatably supported on the top surface of the mounting member 2. The stand 4 is a speaker fixedly attached to the rotary stand 3.

FIGS. 2 and 3 show the rotation support structure of the rotary table 3, and in the figures, 5 is a support member fixed to the bottom plate of the mounting member 2 and has an upright cylindrical part 6; A fixed pipe has a communication hole 8 for wiring which is passed through the cylindrical portion 6 of the support member 5 and fixed upright, and a flange portion 9 is provided at the upper end of the fixed pipe.

Then, the central portion of the rotary table 3 is recessed downward to form a cylindrical recess 10, and a protrusion 11 is provided at a predetermined position on the outer surface of the side wall 10' as shown in FIG. A worm wheel 12 is attached and fixed to the portion.

Then, the speaker 4 is fixed to the rotary table 3 in a direction that corresponds to the projection 11.

Reference numeral 13 denotes a fixed ring which is screwed into the opening of the recess 10 of the rotary table 3 so as to be flush with the upper surface of the rotary table 3, and 14.14 is a fixed pipe 7 which is fitted and fixed in the recess 10. 15 is a spacer interposed between the bearings 14; 16 is a friction bearing inserted and fixed into the fixed pipe 7 and interposed between the worm wheels 12; 17; is the bracket attached and fixed to the above case 2, 18
is an electric motor fixed at a predetermined position on the bottom plate of the mounting member 2, and a worm screw 2 is attached to the rotating shaft 19 of the electric motor 18.
0, and its tip is rotatably supported by a bearing 21 attached to the bracket 17, and the worm screw 20 is screwed into the worm wheel 12,
The driving force of the electric motor 18 is this worm screw 2.
0 and the worm wheel 12 to the rotary table 3,
The rotary table 3 is rotated in forward and reverse directions.

22, 23, 24, and 25 are the protrusions 11 of the rotary base 3 arranged circumferentially on the upper surface of the mounting member 2 of the rotary base 3, that is, at positions in the desired direction in which the speaker 4 is to be directed, for example, at positions in the longitudinal and lateral directions of the vehicle body 10. This is a limit switch placed so that it is in contact with the

FIG. 4 shows an electric circuit diagram for rotating the rotary table 3, in which 26 is a power switch for driving the electric motor 18, and when this is in the neutral position, the electric motor 18 stops; When tilted to the right, the motor 18 rotates normally to rotate the rotary table 3 to the right, and when tilted to the left, the electric motor 18 reverses and rotates the rotary table 3 to the left.

The limit switches 22, 23, 24, and 25 all have a common contact a, a normally closed contact, and a normally open contact C, and the protrusion 11 of the rotary table 3 comes into contact with any of the limit switches. When the limit switch contacts a and c, they become conductive and at the same time, contacts a and t)
When the gap becomes non-conductive, the electric motor 18 stops driving, thereby stopping the rotation of the rotary table 3.

27, 28, 29 and 30 are each limit switch 2 above.
2.23. Pilot lamps are connected to the normally open contacts C corresponding to 24 and 25, respectively. When the rotary table 3 stops, the limit switch corresponding to the limit switch that the protrusion 11 abuts lights up to notify the direction of the speaker 4.

31 is a push button switch interposed between the electric motor 18 and the electric switch 26;
By pressing , the electric motor 18, which has been stopped due to contact between the protrusion 11 of the rotary table 3 and any of the nomit switches 22, 23, 24, and 25, is rotated forward or reverse, and the rotary table 3 is rotated in the right direction or in the reverse direction. It rotates to the left.

Furthermore, among the above limit switches, limit switch 25
After the electric motor 18 has stopped, the pushbutton switch 3
The connection structure is such that even if 1 is pressed, the rotary table 3 does not rotate more than one rotation, that is, 360 degrees.

Then, the power switch 26 and the pilot lamp 27
．． 28, 29, 30 and the push button switch 31 are provided on the operation panel 32 as shown in FIG.

If it is desired to direct the speaker 4 in a desired sound amplification direction, the procedure is as follows.

Note that the position A where the limit switch 22 is placed is the front, and the positions B, C, and D where the limit switches 23, 24 and 25 are placed are the right, rear, and left, respectively.

When the power switch 26 on the operation panel 32 is in the neutral position, the electric motor 18 is not driven, the rotary table 3 is stationary, and the speaker 4 is oriented in any desired sound amplification direction. .

Then, when the power switch 26 is turned to the right, the common contact a and the normally closed contact of each limit switch 22, 23, 24, and 25 are in a conductive state, so the electric motor 18 is driven to rotate. The rotational force is
It is transmitted to the rotating table 3 via the worm screw 20 and the worm wheel 12 of 9.

As a result, the speaker 4, which was facing diagonally forward to the left from position A, is rotated forward toward position A.

Then, when the speaker 4 falls to position A, the protrusion 11 of the rotary table 3 hits the limit switch 22, and the common contact a and the normally closed contact become non-conductive, and the drive of the electric motor 18 is stopped. As a result, the rotary table 3 stops rotating and the speaker 4 is fixed facing forward, and at the same time, the common contact a and the normally open contact C become electrically connected, and the pilot lamp 27 lights up and the speaker 4 informs the operator in the driver's seat that the vehicle is facing in the direction of position A, that is, facing forward.

If it is desired to further rotate the speaker 4 to the right, the pushbutton switch 31 is pressed.

Then, the electric motor 18 is driven, and the turntable 3 is rotated via the worm screw 20 and the worm wheel 12 in the same manner as described above.

Simultaneously with the rotation of the rotary table 3, the limit switch 22 returns and the common contact a and the normally closed contact become conductive.
Even when the pilot lamp 27 goes out and the pushbutton switch 31 is released, the rotary base 3 continues to rotate, and when the speaker 4 reaches position B, the protrusion 1 of the rotary base 3
1 hits the limit switch 23, and the common contact a is
The normally closed contact C is in a non-conducting state, and the normally open contact C is in a conducting state, so that the pilot lamp 28 lights up and the rotary table 3 stops rotating, and the speaker 4 moves in the direction of position B, that is, in the right direction. It is fixed in the position facing.

Then, when the pushbutton switch 31 is pressed again, the turntable 3 rotates, and the speaker 4 rotates in the same manner as described above.
It is stopped and fixed toward the rear at position C, and the pilot lamp 29 lights up.

When the pushbutton switch 31 is further pressed, the rotary table 3 rotates further and stops rotating at the position, and the pilot lamp 30 lights up.

When the speaker 4 stops at this position facing left,
Even if the push button switch 31 is pressed, the electric motor 18 is not driven, and therefore the rotary table 3 does not rotate any further in the right direction.

When the speaker 4 is in this position and you want to rotate it to the left, return the power switch 26 to the neutral position, then switch it further to the left, that is, in the reverse direction, and then press the push button switch 31. do.

Then, the electric motor 18 is reversely rotated, and the rotary table 3 is rotated to the left via the worm screw 20 and the worm wheel 12 in the same manner as described above.

Simultaneously with this rotation of the rotary table 3, the limit switch 25 returns and the common contact a and the normally closed contact become electrically connected.
Even when the pilot lamp 30 goes out and the push button switch 31 is released, the rotary table 3 continues to rotate in the reverse direction.

At each of the upper positions C, B, and A, limit switches 24, 23, .
22, the respective pilot lamps 29, 28, and 27 light up as in the case of forward rotation, and at the same time, the rotary table 3 stops and the speaker 4 is fixed facing backward, rightward, and forward, respectively.

Rotation of the speaker 4 from position C to B, from B to A, and further from A to D is performed by pressing the push button switch 31 in the same manner as in the case of forward rotation.

Then, when the speaker 4 falls into position, the speaker 4 is stopped and fixed facing leftward, and the pilot lamp 30 is turned on.

When the speaker 4 stops at this position, the electric motor 18 is not driven even if the push button switch 31 is pressed, and the rotary table 3 does not rotate further to the left.

Then, if you want to rotate the turntable 3 to the right again, return the power switch 26 to the neutral position, then switch it further to the right, that is, in the normal rotation direction, and then press the push button switch 31. The electric motor 18 is rotated in the forward direction, and the rotary table 3 is rotated in the same manner as described above.

Repeat the same operation below.

Incidentally, if it is desired to continuously hold and fix the speaker 4 at each position A, B, C, and D, the power switch 26 may be returned to the neutral position.

If the power switch 26 is in the neutral position in this way, the pushbutton switch 31. Even if you press , the electric motor 18 is not driven, and therefore the rotating table 3 can be prevented from rotating inadvertently.

As explained above, the present invention consists of a rotary table that is rotatably supported on the car body, on which a speaker is attached and fixed, and that has protrusions at predetermined positions; A no limit switch is arranged and fixed in such a way that it comes into contact with the protrusion, and stops the rotary table when the protrusion comes into contact with the limit switch, and a limit switch is provided corresponding to the limit switch, so that the protrusion of the rotary table comes into contact with the limit switch. A pilot lamp that lights up when the rotary table is stopped to indicate the direction of the speaker, an electric motor that rotates the rotary table, a power switch for switching between forward and reverse rotation of the electric motor, and a protrusion and a limit of the rotary table. It consists of a push button switch interposed between the power switch and the electric motor to rotate the rotary table which has stopped due to contact with the switch, so the speaker can be rotated and easily held in the desired sound amplification direction. It can be fixed, and in particular, if it is necessary to change the direction of sound amplification while driving, the direction of sound amplification can be changed by rotating only the speakers without changing the direction of the vehicle body.
The practical effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a speaker rotation device according to the present invention, FIG. 2 is an explanatory cross-sectional diagram thereof, FIG. 3 is a partial cross-sectional diagram thereof, and FIG.
The figure is an explanatory diagram of the electric circuit, and FIG. 5 is an explanatory diagram of the operation panel. 3... Rotating stand, 4... Speaker, 18
......Electric motor, 22, 23, 24.25...
... Limit switch, 26 ... Power switch, 27.28, 29.30 ... Pilot lamp, 31 ... Push button switch.

Claims (1)

[Scope of utility model registration request] A rotary table with a speaker rotatably supported on the vehicle body and provided with projections at predetermined positions; and a rotary table arranged and fixed at equidistant positions on the circumference around the center of the rotary table so as to come into contact with the projections. A limit switch is provided corresponding to each limit switch to stop the rotary table when the protrusion of the rotary table comes into contact with the limit switch, and lights up when the rotary table stops due to the contact between the protrusion of the rotary table and the limit switch, and the speaker is emitted. A pilot lamp that indicates the direction, an electric motor that rotates the rotary table, a power switch that switches the electric motor between forward and reverse rotation, and a rotary table that has stopped due to contact between the protrusion of the rotary table and the limit switch. An automobile speaker rotation device comprising a push button switch interposed between a power switch and an electric motor for rotation.