JPS63306582A - Automatic performance device for cylinder record - Google Patents

Abstract

PURPOSE:To realize a performance with the high quality of sound by entirely uniformizing the diameter of the surface of a record recorded and reproduced with a laser beam and traced with an optical pickup. CONSTITUTION:A cylinder record is started to be rotated and a music is performed by irradiating the protruded pit 1 on the surface of the cylinder record from the objective lens 14 of a lens moving window 15 at the lower side of the record with the aid of the laser beam. The structure of an automatic performance device is as follows. When the performance is finished, a front cover 11 and a record supporting pole 12 are moved forward a little along a movement groove 13 and a housing device 8 is turned at a fixed angle with the aid of a rotation axis 16 which is at the center of the device. Simultaneously to that, a second record is moved to the lowest side. Then when the record supporting pole 12 and the front cover 11 are moved backward and installed in the housing device 8, the second record is rotated at a fixed speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic performance device for cylinder records.

The cylinder record that is the basis of this patent was created in January 1985! A patent application was filed on May 8, 1988, with application number 60-2-56656, and it was disclosed to the public on May 28, 1986, with patent publication number 62-117152.

(1) Problems with the conventional technology Conventional compact discs are recorded and played back using laser light and rely on digital signals, which has dramatically improved the sound quality. 2
The speed of tracing at the pick-up position is kept constant, with 00 rotations and 500 rotations on the inner circumference, but this technique is difficult and there are no players from any manufacturer on the market that match this.

(2) Purpose of the Invention The present invention provides a long-time automatic performance device for cylinder records.

This automatic performance device can be used to: ■ Store several cylinder records in a home player and listen to automatic performances continuously or arbitrarily, or ■ Use it as a pocket-sized player.
This invention aims to improve one's knowledge and enrich one's social life by listening to music, languages, natural science, literature, cooking, morality, etc. using an auto-reversing book record.

(3) Structure of the invention (a) Manufacturing process of cylinder records A photosensitizer is applied to the surface of a cylindrical glass, and when it is developed by irradiating it with a laser beam, the areas hit by the beam are cut and pits are formed. This surface is then plated with silver to create a metal master.

A mold is made from a metal master using an inversion method on the surface of a plastic cylinder that has a connection part with the motor on one end and a connection part with the support column on the other side, and aluminum vapor deposition with good reflection efficiency is applied to this. A cylindrical record is produced by coating it with a protective layer of transparent plastic.

(a) The configuration of a cylinder record player in Figure 1 is as follows:
In the front view of the cylinder record player of this invention, press the button to open/close the window of the player and fold down the window to store it! Move the front a (11) of (8) to store several cylinder records, or take them out and replace them.

Figure 2A is a configuration diagram of a cylinder record.The outer periphery of the cylinder, in which the motor joint (3) is provided at one end of the cylindrical record, is mostly formed by the tracing surface of the record, and the laser pickup is attached to this. Laser light from the objective lens (14) illuminates the pit (1), and music or the like is played.

On the back side of this cylinder record is the motor shaft joint (
3) has a connecting part (4) on the front that connects to the record support column (12), and a label (5) that shows the song title and a lead-in that records information other than music such as the song number and elapsed playing time. It consists of part (2).

FIG. 2B is a diagram showing the arrangement of pits (1) on the trace surface. Figure 2C is a cross-sectional view of a cylinder record, and the pits (1) are fine protrusions formed of aluminum reflective patterns (6), and the outer periphery of the pits (1) is coated with transparent plastic protection M (7). (4) is a connection part with the support column (I2).

Figure 3 is a configuration diagram of a cylinder record and an objective lens. The laser light from the semiconductor laser (20) of the optical pickup becomes a sharp conical beam from the objective lens (14), focuses on the signal surface of the record, and protrudes. shaped pit (1
) passes through the objective lens (14) again and exchanges the optical signal from the detector (26) into a digital signal, which is further converted into an analog signal and passes through each circuit to reproduce ultra-high-fidelity audio. be done.

Figure 4 is a configuration diagram of a cylinder record and an optical pickup. The light emitted from the semiconductor laser (20) is converted into a parallel beam by the collimating lens (21) and then the prism (
22) in 4 minutes! It reaches the wave plate (24). When the laser beam passes through this wave plate twice, the direction of polarization is rotated by 90 degrees. The laser beam that has passed through the wave plate (24) is focused by the objective lens (14), which is equipped with a drive actuator (23) that responds at high speed so that the track can always be kept in focus on the record. ing.

In this way, the laser beam from the objective lens (14) irradiates the pit (1) on the outer periphery of the cylinder record, and only the light that hits the pit (1) is reflected and leaves the objective lens (14) for 4 minutes. It passes through the 1-wavelength plate (24), is deflected by 90° with the prism h (22), and is attached to the sensor lens (25).
), the light is focused by a photodiode detector (26) that converts the optical signal into a digital signal, which converts the light into a digital signal, which is converted into an analog signal and reproduced as audio.

(1) Long-term automatic performance device FIG. 5A is a sketch of a storage device for cylinder records. Drill several long circular holes to store the record, and from these holes, drill a horizontally long laser beam irradiation window (9) on the outer periphery, and drill several small holes in the bottom to attach the motor shaft (lO) to the inside. Install a spring at the bottom of the

Next, a rotating shaft (16) is installed in the center of the cylinder to complete the cylinder record storage device (8). The front side of the storage device is provided with a front 11 (11) to be attached to the storage device and a record support column (12) connected to this, and a support column movement groove (13).
).

The 1FJii (11) is shaped like a horseshoe, with a tunnel-like hole bored in the lower center so that the record support column (12) can easily hold the cylinder record. The record support column (12) has a joint part with the record on the back side.

When the player's door open/close button is pressed, the player's door opens, and at the same time, the support column (12) moves forward a little, and the front 11 (11) of the storage device (8) also moves forward, and this moves sideways. Several cylinder records are inserted into the six holes on the front side of this storage device (8), which can be moved or tilted forward to facilitate taking in and out of records.

When you press the player's open/close button again, the front M (11) will stand up or move sideways and open the record support column (12) and front cover (
11) is coupled to the storage device (8). At this time, the motor shaft (lO) and the record support column (12) are connected to the lowest cylinder record, and the window of the player is closed.

When you press the play button on the player, the cylinder record located at the bottom of the storage device (8) rotates at a constant speed using a motor, and the lens movement window (15) installed at the bottom of the record is moved to the objective of the optical pickup. Music is played by moving the lens (14) and irradiating the pits (1) on the record surface with laser light.

When the first record is finished, the motor shaft (10) is separated from the record and attached to the support column (12). (11
) is the movement groove (13) that moves forward and the storage device (8)
rotates at a fixed angle (60° for a record that stores 6 records) on the rotating shaft (16), and as the next record moves to the bottom, the record support column (12) and the front! [(11) moves rearward and is coupled to the storage device (8). At this time, the motor shaft (lO) is connected to the next record at the bottom, and the second cylinder record automatically starts playing.

This automatic performance device for cylinder records is characterized in that it continuously plays several records stored in a storage unit W (8) for a long time.

(1) Pocket-type auto-reverse type automatic performance device FIG. 6 is a sketch of a pocket-type auto-reverse type automatic performance device for cylinder records. As shown in Figure 7, two cylinder records, A and B, are set in the housing of a storage box with opposite directions, and a laser irradiator (17) with a built-in optical pickup is installed at a position midway between the two records. The laser irradiator (17) has a cylindrical shape and has a horizontally long lens moving window (15) bored on one side in the horizontal direction, and the objective lens (14) of the optical pickup moves through the lens moving window in conjunction with the rotation of the cylinder record. (15) Move horizontally. The structure is such that a laser beam from an objective lens (I4) of an optical pickup traces pits (1) on the outer peripheral surface of a cylinder record to reproduce audio.

When the performance of the first cylinder record is finished, the motor shaft (10) is switched to the second record and rotates in the opposite direction to the direction of rotation for the first record. At the same time, the laser irradiator (17) also rotates 180 degrees, and the lens moving window (15) rotates to the front position of the next cylinder record.

At this time, the position of the objective lens (14) has moved to the starting point of the performance of the cylinder record, so the laser beam is directly irradiated from this objective lens (14) to the pits (1) on the dressing surface of the cylinder record. Can be done.

This performance equipment! (8) is an automatic playing device for an auto-reverse type Q-pocket type cylinder record that alternately traces two records with a laser beam.

In practice, as shown in Figure 2C, the diameter between both pits of the cylinder record (the length between both bits when cut) is approximately 26 mm, and a 1 mm transparent protective layer is coated on the outside. If the diameter is 28 mm, the pit surface is 90 mm long, and the rotational speed is the same as the average speed of a compact disc, the playing time of one cylinder record is 73 minutes, which means that the playing time for both is almost the same. .

In addition, the width and depth of conventional portable compact disc recorders are more than 125 mm at their minimum width and depth, making it impossible to carry them in a pocket, but the Oto-reverse pocket recorder of this invention has a housing width of 115 mm. This cylinder record has a height of 85 mm and a depth of 85 mm.This cylinder record is recorded and played back using a laser, and because it relies on digital signals, it has the advantage of particularly excellent sound quality. .

Furthermore, with this cylinder record, the diameter of the record surface that the optical pickup traces is completely constant everywhere, so the rotation speed of the motor can always be kept constant, so the rhythm between the actual performance and the record playback sound is consistent.

[Brief explanation of the drawing]

Figure 1 is a diagram of a player equipped with an automatic playing device for cylinder records, Figure 3 is a diagram of laser beam irradiation, Figure 4 is a configuration diagram of a cylinder record and objective lens, and Figure 5A is a sketch of the record storage device. 5B is a diagram showing the front cover installed in the storage device, FIG. 5C is a partially cutaway structural diagram of the automatic performance device, and FIG. 6 is a front view and a structural diagram of the pocket recorder. Answer r 圓 6 ri/J jinrノ'mC-

Claims (1)

[Scope of Claims] 1 Several long round holes are drilled into a cylindrical body made of plastic or the like into which cylinder records are inserted, and a horizontally elongated laser beam irradiation window (9) extends from the holes toward the outer periphery, and a motor is connected to the bottom. A storage device (8) is manufactured by drilling a hole and installing a spring at the inner bottom and a rotating shaft (16) at the center. The support column movement groove (1
3) and install a support column (12) and a horseshoe-shaped front lid (11) connected thereto. When you press the opening/closing button on the player window, the window will fall forward centering on the bottom, the front cover (11) and support column (12) will move forward a little, and the front cover (11) will move laterally or pivot on the bottom. When the player tilts forward, inserts several cylinder records from the record insertion slot, and presses the player window open/close button again, the player window closes and the front cover (11) and support column (12) move rearward. storage device (
8), and the supporting column (12) is connected to the bottom cylinder record, and the cylinder record starts to rotate. The pit of the protrusion on the record surface (1
) is irradiated with laser light and music is played. When the record finishes playing, the record stops rotating, and the front cover (11) and support column (12) move into the moving groove (13).
The storage device (8) is rotated at a certain angle by the rotating shaft (16) in the center, and the next record is moved to the bottom, and the record support column (12) and front cover are moved slightly forward. (1
1) An automatic playing device for a cylinder record, characterized in that the second record rotates at a constant speed when the second record moves backward and is installed in the storage device (8), and performs continuous automatic play. . 2 Place two cylinder records (A and B) facing in opposite directions in the housing of the storage box, and place a laser irradiator (17
). The laser irradiator (17) has a cylindrical shape with a horizontally long lens moving window (15) bored on one side, and the objective lens (14) of the optical pickup is linked to the rotation of the cylinder record.
The lens movement window (15) is moved laterally, and the laser beam traces the pits (1) on the outer peripheral surface of the cylinder record to reproduce the sound. When the performance of A's cylinder record ends, the motor shaft (10) is switched to B's cylinder record and rotates in the opposite direction to the rotating direction of A's record. At the same time, the laser irradiator (17) also rotates 180 degrees, and the lens moving window (15) moves to the front position of the next record (B). At this time, the position of the objective lens (14) has moved to the starting point of the performance of the cylinder record, so the laser beam is continuously irradiated from this objective lens (14) onto the pits (1) on the trace surface of the Otsu record. can do. This performance device (8) has a cylindrical laser irradiator (17) with a built-in laser pickup installed in the middle position between the two cylinder records A and B, which can be rotated 180 degrees. An auto-reverse type automatic playing device for a cylinder record, characterized in that the laser beam of a pickup irradiates the pits of the cylinder record, and two records are played consecutively.