KR850000856Y1 - Disc-shaped recording medium reproducing apparatus - Google Patents

Abstract

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Description

Information recording media player

1 is a partial cutaway perspective view showing an example of a disk storage case proposed by the present applicant as an apparatus applied to the present invention.

2 is a partial cutaway perspective view showing an example of the mechanical configuration of the reproducing apparatus proposed by the present applicant as a mechanical configuration of the apparatus according to the present invention.

3 is a circuit diagram showing an embodiment of the device according to the present invention.

The present invention relates to an information recording medium reproducing apparatus, wherein the information recording medium is reproduced or not reproduced by a state of a display signal, even though the information recording medium is not mounted. It is an object of the present invention to provide a reproducing apparatus which is prevented from being in a reproducing state by mistake.

In a device for reproducing a disc-shaped information recording medium (hereinafter referred to as a disc) such as a conventional video disc and a PCM audio disc, since the disc is recorded at a high density, it may be damaged, dust or fingerprints when handling the disc on such a signal recording surface. The disc is protected in the case so that hands are not in direct contact to avoid attachments. Such a device was a type in which a disc was collected in a reproducing apparatus while a storage case containing a disc was inserted into the reproducing apparatus and withdrawn, and an empty storage case was inserted into the reproducing apparatus for retrieving the disc and withdrawn. . Therefore, in such a disc reproducing apparatus, it is generally difficult to externally identify whether or not a disc is mounted. Therefore, either the first (surface) or the second (rear) surface of the disc in accordance with the presence or absence of the disc is mounted. On the other hand, there is a mark to indicate whether the player is installed in the state of playing. However, there is a case in which the play switch is accidentally pressed even though the disc is not mounted. In such a case, the playback device is brought into a playback state and the signal converter such as the needle is damaged.

The present invention is to remove the above-described drawbacks, it will be described with reference to the drawings and embodiments according to the drawings.

FIG. 1 is a perspective view of a device which is applied to the present invention, in which an example of a disc storage case previously proposed by the applicant in Japanese Patent Application No. 55-11278 is partially cut away. Reference numeral 1 denotes a disc storage case, and a lid 3 detachably coupled to a front side of a rectangular case body (hereinafter referred to as a sleeve) 2 and an insertion direction of the sleeve 2 (indicated by an arrow X ₁ ). The disk 4, which is roughly constituted by a signal and which signals are recorded on both surfaces in the flat space of the sleeve 2, is housed.

The sleeve 2 combines a pair of half bodies 5 in an up-and-down tub, the insertion direction side is the opening part 6, and the remaining three sides are closed. The lid 3 is composed of a main body 7, a locking arm 8 on the left and right sides of the main body 7, and a wide jaw portion 9 on the front side of the main body 7. The main body 7 (thickness equal to the interval of the opening 6) is inserted between the upper plate 10 and the lower plate 11 of the sleeve 2 so that the concave portion 12 of the locking arm 8 is closed. The wide jaw portion 9 is engaged in the recess 13 at both ends of the sleeve, and the wide jaw portion 9 is in contact with the open end faces of the upper plate 10 and the lower plate 11 and is restricted in movement in the directions of arrows X ₁ and X _2. In which the opening 6 is covered and joined to the sleeve 2. The disk 4 is locked to the circular arc top surface 14 of the main body portion 7 to restrict movement in the direction of arrow X ₁ , and to the side wall portions of the sleeve 2 and to the arrow Y ₁ .Y ₂ direction. The movement is limited, and is locked in the projection 24 so as to be stored in the sleeve 2 in a state where the movement in the direction of arrow X ₂ is limited.

At the end of the lid 3, a pair of recessed cutouts 16 are formed in the left and right symmetrical positions apart from the center with a pair of recessed portions 15 near the center. In addition, the display cutout 17 for display is formed adjacent to one cutout 16 of the front end of the lid 3. In the case where the disc 4 is a PCM audio disc, the cutout portion 18 is formed at the position indicated by the dotted line, but in the case of a video disc, the cutout portion is not formed.

2 is a perspective view showing an example of the mechanical configuration of the reproducing apparatus according to the present invention, which uses the reproducing apparatus previously proposed by the present applicant in the patent application No. 55-14221. Referring to FIG. 2, the reproducing apparatus 30 clamps the mechanism (not shown) for opening the opening 6 of the sleeve 2 up and down, the turntable 32 on which the disk 4 is disposed, and the disk 4. And a mechanism 34 for locking the lid 3. The locking mechanism 34 is configured symmetrically with respect to the arrow X ₁ direction line through the center of the turntable 32, and the same reference numerals are added by adding "a" in one component part.

The disc clamp mechanism 33 is composed of a lower clamp arm 60 and a pair of upper clamp arms 61 and 61a that are independent of each other, and are provided in the core portion of the reproducing apparatus 30. The clamp mechanism 33 is configured to clamp the disk 4 at two places. The lower clamp arm 60 has a pair of U-shaped clamp portions 62 and 62a as an integrated structure and is supported by the upper side 63. One end of the wire 64 is connected to the clamp arm 60, and the clamp arm 60 rotates in the arrow B direction (clamping direction) by the action of the spring mechanism 159 connected to the wire 64. do. The upper clamp arms 61 and 61a are supported by the shaft 66, respectively, and each of the jaw-shaped clamp portions 67 and 67a is in contact with or close to the clamp portions 62 and 62a which are opposed by their own weight.

The locking mechanism 34 is provided with a detection switch group for performing various types of detection in cooperation with the shape of the lid 3, while the identification detection switches 35 and 36 and the detection switch 37 for disc type discrimination are provided. As shown in FIG. 2, it is provided in a predetermined position. In other words, when the disc storage case 1 is inserted into the playback device 30, one of the cutouts 18 placed in the symmetrical position in FIG. 1 faces the detection switch 37, and the cutouts 17 are formed in the It is arranged so as to oppose the detection switch 36 at the one-side reproduction, but to the detection switch 35 at the second reproduction.

Reference numeral 48 denotes a pick case, which includes a playback needle 49 and a cantilever 50, and moves in the directions of arrows Y ₁ and Y ₂ in contact with a pair of guide rods 51 and 52.

The differential gear device 130 is installed at the right end portion close to the regeneration device 30, and has a bevel having the same shape as the first gear and the first gear which integrally constitute the bevel gear 132 and the drum 133. While supporting the second gear constituting the gear 136 and the winding drum 137 integrally, the drive shaft 134 rotatably supporting the first and second gears, and the bevel gears 141 and 142 rotatably, The third gear is fixed to the drive shaft 134 by screws (not shown).

The drive shaft 134 rotates from the motor 144 through the worm gear 145, where the motor 144 and the worm gear 145 are actually located at the other end side of the drive shaft 134, that is, in the regeneration device.

Reference numeral 150 denotes a wire belt for picket case transport, and is caught between the drum 133 and the drum 151, and an arm part 152 protruding from the pickcase case 48 is fixed to a part of the wire belt 150. It is.

The rotating plate 153 is supported on the shaft 154, the rotational force is added in the direction of the arrow K by the tension spring 155, the spring force of the spring 155 is four springs (supporting the platen plate 103) It is larger than the total spring force of 104). A wire 156 is hooked through the pulley 157 between the rotating plate 153 and the pin 146 standing on the winding drum 137.

The disk clamp wire 158 is wound around the semicircular cross section of the winding drum 157 and is fixed. A spring mechanism 159 is provided in the middle of the wire 158.

Here, in the vehicle gear device 130, a gear having a smaller rotational load among the first gear and the second gear is selectively rotated. Meanwhile, the transfer load of the pick case 48 is larger than the disk lowering operation load and the disk lifting operation. Smaller than haha

The differential gear device 130, the pick case 48, and the like in the state where the disc 4 is clamped in the reproducing apparatus and positioned at an upper position of the turntable 32 are in a state as shown in FIG. That is, the detection switch 160 is turned on by being pressed by the rotating plate 153 and has a function of checking the state. When the play operation is performed in this state, the motor 144 is started and the drive shaft 134 rotates in the direction of the arrow M. As shown in FIG. In addition, by this operation, the second gears 136 and 137 of the light load rotate in the same direction, the wire 156 is relaxed, and the rotating plate 153 rotates in the direction of arrow K by the spring 155. Accordingly, the rotating plate 100 is pressed by the extended arm portion 153a of the rotating plate 153 to rotate in the direction of the arrow D, and the piezoelectric body 106 descends. The disk clamp is also released as the wire 158 relaxes. When the second gears 136 and 137 rotate at a predetermined angle, the pin 146 abuts against the fixing plate 16 fixed to the right wall 147, thereby limiting the rotation. That is, since the rotation loads of the second gears 136 and 137 are greater than the rotation loads of the first gears 132 and 133, the first gears 132 and 133 start to rotate in the direction of the arrow M. FIG. Due to the rotation of the gears 132 and 133, the wire 150 travels and the pick case 48 is transported at a high speed to the position opposite to the left end of the disk in the direction of arrow Y ₁ . At the time of regeneration, the transfer of the pick case 48 is also performed by the motor 144.

Next, the disk mounting operation and operation will be described.

The disc loading operation is performed by holding the grip of the disc storage case 1 and inserting it into the reproducing apparatus 30 to the core in the direction of arrow X ₁ horizontally, and then taking out the case.

When the disc storage case 1 faces the cover 3 forward and is inserted into the playback device 30 through the insertion hole 38, the opening 6 of the sleeve 2 is moved up and down by a sleeve expansion mechanism (not shown). In the open position, it is inserted in the direction of arrow X ₁ together with the sleeve expansion mechanism. As the slab expansion mechanism moves in the direction of arrow X ₁ , the rotating plate 100 rotates in the direction of arrow D. As the rotating plate 100 rotates, four wires 102 are tensioned, and the piezoelectric plate 103 descends accordingly. The rolling plate 103 is supported by four springs perpendicularly to the supporting plate 105 by a spring 104. As the platen plate 103 moves downward, the platen body 106 (which rotates integrally with the turntable 32 and moves up and down) moves downward to move away from the insertion container of the disc storage case.

When the disc storage case 1 is inserted into the core of the reproducing apparatus 30 through the upper side of the turntable 32 together with the sleeve expansion mechanism, the recess 15 of the lid 3 is clamped arms 60, 61, 61a. The clamp arm compresses and passes between the clamp arms 62 and 67 (62a and 67a) facing each other. The clamp arms 60, 61, 61a are in place after the recess 15 of the lid 3 passes, and the clamps 62, 67 clamp the groove guard of the disk 4. The recessed part 15 of the cover 3 is loosely fitted in the space, and the disk clamp operation is not restricted by the cover 3 when the disk storage case 1 is inserted to the final position.

Accordingly, the final moving position of the disk 4 is determined by the latch mechanism of the final position of the disk storage case 1, and the position of the disk 4 is set by the protrusions 24 in the direction of the arrow X ₂ . By locking, the turn tie loop 32 is accurately determined by being accurately determined in the disk storage case 1 or the like. As a result, the disk 4 is clamped and positioned almost accurately in a position located immediately above the turntable loop 32. Thus, the disk 4 is not pulled out together when the sleeve 2 is subsequently taken out.

On the other hand, the lid 3 is caught and supported by the locking mechanism 34 in connection with the disc clamp operation. At this time, when the disc 4 is a video disc, since the cutout 18 is not provided in the lid 3 of FIG. 1, the detection switch 37 of FIG. 2 does not cover the reproduction of any of the first and second surfaces. When engaging (3), it is turned ON by being pushed in by the front end of the lid 3, and it is detected and displayed as a video disk.

In addition, when the first surface of the disc 4 is inserted into the reproducing apparatus 30 as the upper surface to be reproduced, the detection switch 35 of FIG. 2 is formed by the wide jaw portion 9 of the lid 3 of FIG. ) Is turned on as the press-in is pressed, and the detection switch 36 enters the notch 17 and is turned off without being press-fitted. Accordingly, it is electrically detected and displayed that the first surface of the mounted disc 4 is reproduced. On the other hand, when the disc storage case 1 of FIG. 1 is inverted up and down and the second surface is placed on the top surface in the reproducing apparatus 30 to reproduce the second surface of the disc 4, the detection switch 35 While entering the notch 17 and turned off, the detection switch 36 is pushed in by the wide jaw portion 9 of FIG. Thus, it is electrically detected and displayed that the second surface of the mounted disc 4 is reproduced.

When the detection switches 35, 36, 37 are all in the OFF state, the state where the disc 4 is not mounted is detected. In the case of the PCM disc, as described above, the cutout portion 18 of FIG. 1 is re-installed on the lid 3 so that the detection switch 37 is cutout 18 even if either of the first and second surfaces becomes the upper surface. ), It can be detected and displayed that the disc being played back is a PCM disc. Furthermore, even in the case of such a PCM disc, since the cutout 17 is formed in the cover 3 of the same state as the video disc, the surfaces to be reproduced by the detection switches 35 and 36 can be identified and displayed.

The present invention does not allow the playback apparatus to be in the playback state unless the display signal is present, and an embodiment thereof will be described with the circuit diagram of FIG. In the drawings, the same reference numerals are attached to the same parts as those in FIG. The detection switch 35 for the first surface detection display is grounded through the first surface display lamp L ₁ and the resistor 201 in series, and the detection switch 36 for the second surface detection display is the second surface. The display lamp L ₂ and the resistor 201 are grounded in series. The connection points of the lamps L ₁ , L ₂ and the resistor 201 are connected to the base of the NPN transistor 203 via the play switch 202. The transistor 203 has an emitter grounded, and the collector is connected to the power supply 200 with the other end of the detection switch 35.36 through the motor 144 described above.

As described above, when the disc 4 is mounted in the reproducing apparatus 30, when the surface of the disc 4 to be reproduced is the first surface, the detection switch 35 is turned ON. 36 is so because in the off (oFF) the lamp L ₁ only to the power source 200, an on (oN) by the switch 35, the lamps L ₁ and the closed circuit of the resistor 201 is formed to flow the current The lamp L ₁ is turned on to indicate that the first side is the side on which the regeneration is performed. In addition, since the detection switch 36 is turned off, the lamp L ₂ is not turned on.

When the circuit of the detection switch 35 is closed, a signal at the time of detecting the first surface is generated, and a potential is generated at both ends of the resistor 201. However, if the place position 202 is closed in this state, The positive voltage is applied to turn the transistor 203 ON. Accordingly, the motor 144 is energized and rotates, so that the pick-up case 48 is conveyed in the direction of the arrow Y ₁ as described above, and then the regeneration of the first surface of the disk 4 starts according to the above-described operation. do.

On the other hand, the second surface to the upper surface detection switch 36 when it is equipped with a disk 4 is turned on (ON), be a detection switch 35 is OFF) OFF) will light up only the light L _2, the It is indicated that the two sides are reproducible. Subsequently, when the place position 202 is closed, the motor 144 rotates in the same manner as described above, and the pick case 48 is transferred to reproduce the second surface of the disc.

On the other hand, when the disk 4 is not mounted, since the detection switches 35.36 are all turned OFF, the lamps L ₁ and L ₂ are not turned on, and thus the lamps L ₁ and L ₂ and the resistor 201 are turned on. The potential of the connection point with is at ground level. Therefore, even when the operator accidentally turns the play switch 202 ON, the transistor 203 does not turn ON and remains OFF, so the motor 144 does not rotate.

Therefore, when the disc 4 is not mounted in the playback device 30, the motor 144 does not rotate even when the play switch 202 is pressed, and the playback device 30 does not start the playback operation. Therefore, an accident such as a damage to the regeneration needle 49 is prevented.

In the above embodiment, the present applicant has described the use of the playback device and the disc storage case proposed before, but the present invention is not limited thereto, and the present invention can be applied to anything that can obtain a signal for display on the disc.

As described above, the information recording medium reproducing apparatus according to the present invention, on the other hand, is configured to select either the reproducing state or the non-reproducing state of the information recording medium in response to the state of the display signal. If it is not mounted on the device, the information recording medium cannot be played back. Therefore, if the information recording medium is not mounted in the playback device, it will not be played even if the play switch is operated by mistake. It is possible to prevent accidents in advance.

Claims (1)

One or more display circuits 35, L ₁ , 36, and L ₂ for displaying the other of the two reproductions of the information recording medium, the motor 144 for performing the reproduction operation, and In an information recording medium reproducing apparatus including at least a play switch (202) for intermittent supply to a motor, a transistor (203) is inserted into the motor and the play switch, and two pieces of play switches are provided. On the other hand, the display circuit is connected by connecting a terminal on the opposite side of the shaft connected to the transistor to the display circuit, and inserting a potential generator 201 between the connected point and the ground again. And when none of the display lamps L ₁ or I _{2 in} the display lamp is lit, the motor is not started even when the play switch is closed.