JPS6314433B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a disc playback device, and particularly relates to a disc playback device such as a cassette tape recorder in which a disc is attached/detached by opening and closing a lid body with respect to a main body. be. [Background Art] Recently, a digital audio disk (DAD) has been proposed in which an analog signal such as an audio signal is converted into a digital signal and recorded on a recording medium. This digital audio disk (DAD) has a diameter of 12 cm compared to the traditional analog audio disk (AAD).
(In the case of the compact disc developed by Philips), it has excellent effects such as small size, long playback time, and good sound quality. Furthermore, since the disk is small and easy to handle, it can be attached and removed like a cassette tape. [Purpose] This is a disc playback device in which the disc can be inserted and removed by opening and closing the lid, like a cassette tape recorder. The present invention provides a disc playback device that allows the user to perform the following steps. [Example] Figure 1 is a schematic perspective view of a disc playback device.
2 is the bottom chassis, 2 is the drive unit chassis attached to the bottom chassis 1, the motor unit 3 for driving the disk D, and the drive unit chassis 2 is attached to the bottom chassis 1.
A motor 4 and a pick-up feeding mechanism 5 are mounted for feeding a pick-up (not shown) equipped with an optical system for reading information recorded on the disk D in the radial direction of the disk D. Reference numeral 6 denotes a loading unit chassis attached to the bottom chassis 1, on which a cam member 9' having a motor 7 for loading, a speed reducer 8 for decelerating the rotational driving force of the motor 7, and a cam 9 is mounted. 2 and 3 are side views showing the lid closed state and the lid opened state, respectively, in which 10 is a lid that can be opened and closed with respect to the main body of the device, 11 is a shaft that is the center of rotation of the lid 10,
12 is a front plate fixed to the lid body 10; 13 is a clamp device rotatably attached to the front plate 12; and a turntable 14 provided on the main body side of the device.
Clamp disk D with the same force. For example, a magnet is provided on one side and a magnetic material is provided on the other side, and the disk D is clamped by magnetic force. Reference numeral 15 denotes an interlocking lever that interlocks with the lid 10, one end of which is pivotally connected to the rotation shaft 11 of the lid 10, a spring 16 wound around the rotation shaft 11, and the other end connected to the cam of the cam member 9'. 9 is pressed.
15a is a cutout portion formed on the interlocking lever 15;
Reference numerals 7 and 18 denote first and second lock levers which are pivotally mounted on a shaft 19 installed in the loading unit chassis 6, and are connected through a shaft 20. Furthermore, the first
The lock lever 17 follows the cam 9 of the cam member 10, and the second lock lever 18 has a lock portion 18a. 21 is the first and second lock lever 1
A connecting lever that moves according to the movements of 7 and 18.
One end is fixed to a connecting shaft 20 of the lock levers 17, 18, and the other end is loosely fitted into a long hole 21a with a shaft 22. Reference numeral 23 denotes a displacement member that displaces the clamping device 13 in the clamp release direction when the connecting lever 21 moves.One end is fixed to the shaft 22 around the shaft 24 fixed to the lid 10, and the other end is clamped in the figure. It is arranged on the left side of the upper plate 13a that constitutes the device 13 . Reference numeral 25 denotes an L-shaped lever attached between both ends of the interlocking lever 15, on which a switch 26 for detecting lid closure is placed. A switch lever 27 is rotatably attached to the interlocking lever 15, and a switch 28 is attached to one end.
Further, the switch lever 27 is biased by a spring 29 in the direction in which the switch 28 is turned on (ie, in the direction of arrow G). Therefore, the other end of the switch lever 27 comes into pressure contact with the cam 9 of the cam member 9' and follows the movement of the cam 9. [Operation] (i) Automatic lid opening operation From the closed lid state shown in Figure 2, for example, disk D
In order to replace the motor 7, a switch for opening the lid (not shown) is operated to drive the loading motor 7 mounted on the loading unit chassis 6. It is transmitted to the cam member 9' via the worm and the speed reducer 8 , and the cam member 9' is rotated in the A direction. When the cam member 9' rotates in the direction A from the state shown in FIG. 2, the protruding end 9a of the cam 9 presses the lock lever 17.
8 is rotated in the direction B about a shaft 19 installed in the loading unit chassis 6 as a fulcrum.
When the first and second lock levers 17 and 18 rotate in the B direction in this manner, the connection lever 21 whose one end is fixed to the connection shaft 20 moves in the C direction. Therefore, the shaft 2 loosely fitted to the other end of the connecting lever 21
2 is also moved in the C direction at the end of the elongated hole 21a. When the shaft 22 moves in the C direction in this manner, the displacement member 23 seesaws around the shaft 24 fixed to the lid 10, and the other end of the displacement member 23 comes into contact with the upper plate 13a constituting the clamp device 13. come into contact with This contact causes the clamp device 13 to be separated from the disk D. Thereafter, as the cam member 9' rotates in the A direction, the interlocking lever 15 that presses against the cam 9 of the cam member 9' rotates in the D direction.
That is, since the interlocking lever 15 is interlocked with the lid 10, the lid 10 is moved in the E direction (lid opening direction).
Rotate to. By the way, when the interlocking lever 15 rotates in the D direction, the support shaft 30 of the switch lever 27 mounted on the interlocking lever 15 also moves in the D direction, but the other end of the switch lever 27 is rotated by the cam due to the biasing force of the spring 29. It is in pressure contact with the cam 9 of the member 9'. When the lid body 10 is opened by a predetermined angle due to the rotation of the cam member 9' in the A direction, an open lid detection switch (not shown) detects that the lid is in an open state, and the loading motor is activated. Cut off the power supply to 7. In this way, the automatic opening operation of the lid body 10 is achieved. (ii) Automatic lid closing operation When the lid body 10 is slightly pressed in the lid closing direction (i.e., direction E') against the urging force of the spring 16 as shown in FIG. 4 from the open state shown in FIG. , lid body 1
The interlocking lever 15 interlocked with 0 rotates in the D' direction, and the pressure contact between the cam member 9' of the interlocking lever 15 and the cam 9 is released. Also, by rotating the interlocking lever 15 in the D′ direction, the interlocking lever 15
The support shaft 30 of the switch lever 27 installed in
Move in direction D′. At this time as well, one end of the switch lever 27 is pressed against the cam 9 of the cam member 9' by the biasing force of the spring 29. Therefore, the switch lever 27 has rotated clockwise relative to the interlocking lever 15 in the figure, and the operation piece 28a of the switch 28 attached to one end of the switch lever 27 has moved to the interlocking lever 15. The switch 28 is turned on by contacting the switching portion 15a formed in the switch 28. When the switch 28 is turned on, power is supplied to the loading motor 7, but the motor 7 rotates in the opposite direction to that when the lid is opened. Therefore, the cam member 9' to which the rotational driving force of the motor 7 is transmitted via the worm and the reducer 8 is
Rotate in direction A′. When the cam member 9' rotates in the direction A' in this manner, the interlocking lever 15 and the switch lever 2 which are in pressure contact with the cam 9 of the cam member 9'
7 rotate in the D' direction and the F' direction, respectively. Therefore, the lid body 10 also rotates in the E' direction (lid closing direction). When the cam member 9' continues to rotate in the A' direction and the protruding end 9b of the cam 9 comes into contact with the lock lever 17, the lock levers 17 and 18 are displaced in the B direction. At this time, the connecting lever 15 moves in the C direction and displaces the displacement member 23, thereby bringing one end of the displacement member 23 into contact with the upper plate 13a of the clamping device 13 , but the clamping device 13 is not in this state. , it is in a free state and does not have any influence. After that, the cam member 9'
When the rotation in the A' direction further progresses and the interlocking lever 15 and the switch lever 27 are rotated by the cam 9 to the position shown in FIG.
The lock piece 25a provided on the lock lever 1
It is locked at the lock part 18a of 8, and the L
A lid closure detection switch 26 provided on the letter-shaped lever 25 is turned on to detect that the lid is closed, and the power supply to the loading motor 7 is cut off. In this way an automatic closing operation is achieved. In addition, when the interlocking lever 15 is in the closed state,
Because it is locked by the cam 9 of the cam member 9',
As shown in FIG. 5, the L-shaped lever 25 and the lock portion 18a of the lock lever 18 are not necessarily required. [Effect] During the lid closing operation, the lid can be automatically and reliably closed by simply pressing the lid slightly in the closing direction.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a disc playback device according to the present invention, FIG. 2 is a side view showing the lid closed state, and FIG.
4 is a side view showing the lid in an open state, FIG. 4 is a diagram showing a state in which the lid body is slightly pressed in the closing direction from the state shown in FIG. 3, and FIG. 5 is a diagram showing another embodiment. 7, 9'...Motor and cam member constituting drive means, 10...Lid body, 15...Interlocking lever, 27...Switch lever.

Claims (1)

[Claims] 1. A lid that can be opened and closed with respect to the main body of the disc playback device, an interlocking member interlocking with the lid, a switching member displaceably disposed on the interlocking member, and a switch disposed on the interlocking member or the switching member. and a driving means for driving the lid, and when the lid is closed, the lid is slightly pressed in the closing direction to relatively displace the interlocking member and the switching member to turn on the switch. A disc playback device characterized in that the lid body is closed by driving the driving means.