JPH0447771Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides an optical pickup fixing device for fixing an optical pickup used for reading out signals from a disk in order to protect the optical pickup from shock during transportation. In particular, the present invention relates to an optical pickup fixing device for preventing forgetting to unfasten the optical pickup during use. (b) Prior Art Recently, optical disc players such as CD players (compact disc players) that use optical pickup to read out signals from discs on which signals have been recorded have become popular. As shown in Japanese Utility Model Application No. 59-71471, the disk player has an optical pick-up mounted on a support member that slides on two mutually parallel guide rails consisting of a shaft disposed on a chassis. By driving the support member, the optical pickup is moved in the radial direction of the disk, thereby reproducing the disk. By the way, in order to reproduce a disc using the optical pickup, it is necessary to correctly project the light beam generated from the optical pickup onto the signal on the disc. Correspondingly, the optical pickup is precisely constructed so as to be driven vertically and horizontally along the track of the disk. Therefore, when transporting an optical disc player, it is necessary to protect the optical pickup from shock during transport. In order to protect the optical pickup from impact during transportation, conventionally, fixing parts such as screws and pins are used to secure the support member on which the optical pickup is placed to the guide rail on which the support member is abutted. The optical pickup was pressed against the upper surface of the optical pickup to increase the contact force and fixed to the chassis, and the movement of the optical pickup was restricted, thereby alleviating the shock during transportation. By doing so, the support member does not slide, so that the optical pickup and the drive mechanism for driving the support member can be protected from impact during transportation. (c) Problems that the invention aims to solve By the way, optical disc players are easy to handle, and CD players in particular can easily provide excellent sound quality, and are now widespread, so it is difficult to handle electronic devices. Even people who are not familiar with the disc player are using the disc player. Therefore, if you use the disc player with the optical pickup fixed without reading the instruction manual that came with the disc player, you may not only quickly determine that the disc player is malfunctioning, but also check its condition. repetition,
Accidents have occurred in which the drive mechanism that drives the optical pickup is damaged or the motor that is the drive source for the drive mechanism is damaged, and some kind of countermeasure has been desired. (d) Means for solving the problems The present invention is a fixing device for an optical pickup that has been created in view of the above-mentioned points. A locking member is provided so as to be movable between an unlocked and unlocked position, a switch that is switched in accordance with the movement of the locking member, and a display whose display state is switched in accordance with the switching state of the switch. ing. (E) Function The present invention provides a locking member that is movable between a locked position and an unlocked position, and the locking member restricts the sliding of the optical pickup, and also prevents the movement of the locking member. According to the switching state of the switch, the position of the locking member is detected, and a display indicates that the locking member is in the locked position. (F) Embodiment FIGS. 1 and 2 both show an embodiment of the mechanical part of the present invention, and show the locking member in the locked position and in the non-locked position, respectively. 1 is an optical pickup; 2 is a support member on which the optical pickup 1 is placed; 3 is a protrusion provided on the support member 2 ; 4 is a lock member rotatable about a shaft 4a; A connecting member 6 having one end fixed is rotatable around a shaft 6a, and a substantially V-shaped notch 6b into which the other end of the connecting member 5 is loosely fitted is provided at one end. The lever 7 is a leaf switch arranged to be switched in accordance with the rotation of the lock member 4. The support member 2 has a chassis 9 as shown in FIG.
It is supported by first and second guide rails 10 and 11 that are fixed parallel to each other, and a mounting section 8 on which the central optical pickup 1 is mounted slides on the first guide rail 10 at one end. It consists of a sliding part 12 that moves and a sliding part 14 on which a rack 13 is formed at the other end.The mounting part 8 is made of a metal plate for strength.
4 is made of a synthetic resin material from the viewpoint of ease of molding and slipperiness. And the sliding part 1
As shown in FIG. 6, which is a partial cross-sectional view from the front of FIG.
It is located below the rib 10a on the side surface of 0. Further, the protrusion 3 is formed at one corner of the bottom surface of the sliding portion 12. The second guide rail 11 passes through a sliding hole 16a provided in an aluminum die-cast base 16 in which the optical components of the optical pickup 1 are installed . It is designed to slide as it slides. As shown in FIG. 5, the locking member 4 has a U-shaped cut 4b formed in the center to be engaged with the protrusion 3, a tapered part 4c at the tip, and a connecting member 5 fixed to the upper part. and is rotatably attached to the chassis 9 between a locked position where the notch 4b is engaged with the protrusion 3 and an unlocked position where the engagement between the protrusion 3 and the notch 4b is released. There is. The leaf switch 7 is in an open state when the lock member 4 is in the locked position, and is switched to a closed state when the lock member 4 is rotated to the unlocked position. The contact pieces 7a and 7b of the leaf switch 7 are connected to the first and second terminals 17 of the control signal generating circuit 17, respectively, as shown in FIG.
a and 17b. The control signal generating circuit 17 detects whether or not the first and second terminals 17a and 17b are short-circuited, and also detects whether or not the first and second terminals 17a and 17b are short-circuited, and also detects the terminal _a1 , which is information obtained from the switching state of other switches (not shown). It detects the signals supplied to ao to _ao , and generates a control signal to operate the motor drive circuit 18 and the display drive circuit 19 in response to the detection. In that case, the control signal generation circuit 17 controls the first and second terminals 17a and 17b.
When the terminals are short-circuited, a control signal is generated to operate the motor drive circuit 18 and the display drive circuit 19 according to the signals supplied to the terminals _a1 to _ao , and the first and second terminals are connected to each other. When 17a and 17b are not short-circuited, _the motor drive circuit ₁
It generates a control signal that prohibits the display device drive circuit 19 from operating, and also generates a control signal that causes the display device drive circuit 19 to generate a predetermined drive signal. The motor drive circuit 18 includes the control signal generation circuit 1
The current supplied to the motor 20 that drives the support member 2 is controlled in accordance with the control signal from the motor 2.
Drive 0. Further, the display device drive circuit 19
is a display device 21 composed of a plurality of display elements according to a control signal from the control signal generation circuit 17;
In particular, the control signal generating circuit 17 drives the first
When a control signal generated when a short circuit is detected between the second terminals 17a and 17b is supplied, a predetermined display element of the display 21 is turned on. Assume that the lock member 4 is now in the lock position shown in FIG. In this case, as shown in FIG .
The lock member 4 is slid to the position closest to the lock member 4.
The tapered portion 4c is the sliding portion 12 of the support member 2 .
and the chassis 9, and the lock member 4
The notch 4b and the protrusion 3 provided on the lower surface of the sliding portion 12 are engaged with each other. Further, the thickest part of the tapered part 4c is made thicker than the distance between the sliding part 12 and the chassis 9, and the support member 2 is configured to be rotatable around the second guide rail 11. Since the tapered portion 4
The support member 2 is pushed upward by the abutting force of c on the sliding portion 12. Then, when the support member 2 is pushed up by a predetermined amount, the locking piece 1
The claw 15a of No. 5 is connected to the rib 10 of the first guide rail 10.
Since the support member 2 is brought into contact with the support member 2, the sliding movement of the support member 2 is restricted by the contact force. Further, at this time, the notch 4b of the locking member 4 and the protrusion 3 are engaged, and since the protrusion 3 is gripped by the tip and base of the locking member 4, the sliding of the supporting member 2 is also prevented. movement is regulated. Therefore, when the locking member 4 is in the locked position, the optical pickup 1 and the supporting member 2 are protected from impact during transportation.
The drive mechanism for driving the is protected. By the way, when the above-mentioned locking member 4 is in the locked position, the leaf switch 7 is in the open state. Therefore, if the disc player is powered on in this state, the control signal generation circuit 17 will
It is detected that the leaf switch 7 is in the open state, and a control signal is supplied to the motor drive circuit 18 and the display drive circuit 19 accordingly. Therefore, in this state, even if a regeneration operation or a search operation is performed, the motor 20 does not rotate, which places a burden on the drive mechanisms such as the pinion 25 and rack 13 for driving the support member 2 and the motor 20. Alternatively, a predetermined display element of the display 21 lights up to indicate that the locking member 4 is in the locked position, prompting the user to release the restriction on the sliding of the optical pickup 1, and preventing the disk player from malfunctioning. Let me know that it's not. During use, the knob 23 fitted to the other end of the lever 6 protruding from the surface of the panel 22 constituting a part of the housing of the disc player is operated in the direction of arrow A. Then, one end of the lever 6 is connected to the shaft 6.
It rotates in the direction of arrow B around a. In this case, since the shaft 6a is provided at a position that is far away from the center of the lever 6 toward one end of the lever 6, the distance that one end of the lever 6 moves is smaller than the distance that the other end of the lever 6 moves. It is small and requires only a weak force to operate the other end due to the lever principle. Further, a substantially V-shaped notch 6b is formed at one end of the lever 6, and a connecting member 5 is provided in the notch 6b.
The other end is loosely fitted, and the tip of the other end of the connecting member 5 is in contact with the inner wall of the notch 6b, and the tip of the connecting member 5 is rounded. Therefore, when one end of the lever 6 rotates in the direction of arrow B, the tip of the connecting member 5 slides along the inner wall of the notch 6b. When the tip of the connecting member 5 slides along the inner wall of the notch 6b, a force in the direction of arrow C is applied to the connecting member 5, so that the locking member 4 moves in the direction of arrow C around the shaft 4a. Rotate to. When the locking member 4 rotates, the tapered portion 4c of the locking member 4 is removed from between the sliding portion 12 of the supporting member 2 and the chassis 9, and as the locking member 4 rotates in the direction of arrow C, the tapered portion 4c The thicker portion 4c is gradually removed from between the sliding portion 12 and the chassis 9. Therefore, as the notch 4b of the locking member 4 and the protrusion 3 are disengaged, the support member 2 descends downward. Eventually, when the knob 23 is operated by a predetermined amount and the notch 4b is completely disengaged from the protrusion 3, and the locking member 4 is brought to the unlocked position as shown in FIG. As shown in the figure, the sliding portion 12 is placed on the first guide rail 10, and in this state, the claw 15a of the locking piece 15 is separated from the rib 10a of the first guide rail 10. Note that arrow A on knob 23
When the operation in the direction exceeds a predetermined amount, the point of contact between the other end of the connecting member 5 and the inner wall of the notch 6b of the lever 6 shifts from point X in FIG. 1 to point Y in FIG. The force applied to the connecting member 5 approaches the axis 4a of the locking member 4. Therefore, if the force for operating the knob 23 is constant, the rotational force applied to the locking member 4 weakens, so that the engagement between the notch 4b of the locking member 4 and the protrusion 3 is gradually released more strongly. It is done. By the way, when the lock member 4 rotates in the direction of arrow C, the contact piece 7a of the leaf switch 7 eventually comes into contact with the lock member 4. When the locking member 4 is rotated until the notch 4b and the protrusion 3 are completely disengaged from each other, the leaf switch 7 is in the closed state. Therefore, when the disc player is energized in this state, the control signal generation circuit 17 outputs the terminals a ₁ to a _o
Since a control signal for operating the motor drive circuit 18 and display drive circuit 19 is generated in response to a signal supplied to the When supplied from any or all of a ₁ to a _o , the control signal generation circuit 17 supplies a control signal corresponding to the operation to the motor drive circuit 18 and the display drive circuit 19. Therefore,
The motor drive circuit 18 operates according to the control signal to rotate the motor 20, and the display drive circuit 19 operates according to the control signal,
A predetermined display element of the display 21 is turned on to display an operation corresponding to the operation. When the motor 20 rotates, the rotation of the motor 20 is transmitted to the pinion 25 via a transmission mechanism (not shown), and the rotation of the pinion 25 is transmitted to the rack 13 provided on the side surface of the drive section 14 of the support member 2. communicated. Here, the notch 4b of the locking member 4 and the protrusion 3 are disengaged, and the locking piece 15 is disengaged.
The claw 15a is the rib 10a of the first guide rail 10.
Since the support member 2 is made slidable, the support member 2 slides in the direction of arrow D or E in accordance with the rotation of the pinion 25, thereby performing reproduction and searching. . On the other hand, when transporting again, turn the knob 23 to the second position.
In the figure, the operation may be performed in the direction of arrow F. When the knob 23 is operated in the direction of arrow F, the other end of the lever 6 is rotated in the direction of arrow F, one end of the lever 6 is rotated in the direction of arrow G, and the lock member 4 is rotated in the direction of arrow H. Therefore, when the knob 23 is operated in the direction of arrow F to a predetermined position, the lock member 4 is moved to the first position.
The leaf switch 7 is rotated to the lock position shown in the figure, the sliding of the support member 2 is regulated, and the leaf switch 7 is rotated.
switches from the closed state to the open state. Therefore, the drive mechanism for driving the optical pickup 1 and the support member 2 is again protected from impact during transportation, and when the disk player is energized, the rotation of the motor 20 is prevented. At the same time, the display 21 indicates that the locking member 4 is in the locked position. (g) Effects of the invention As stated above, the optical pickup fixing device according to the invention is configured to switch the display state of the display according to the movement of the locking member that restricts the sliding of the optical pickup. It is possible to display that the sliding of the optical pickup is restricted, and if the disk player is used in this state, the drive mechanism that drives the optical pickup or the motor that is the drive source of the drive mechanism will be damaged. It has the advantage of being able to reduce the number of
Further, as in the embodiment, if the motor is prohibited from rotating when the sliding of the optical pickup is restricted, it is possible to completely prevent damage to the drive mechanism and the motor at this time, and also prevent the disc player from being damaged. This has the advantage of preventing the user from mistakenly assuming that there is a malfunction due to the inoperation.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the mechanism of the present invention, and are plan views showing the locking member in the locked position and the unlocked position, respectively, and Figure 3 shows an embodiment of the invention. A circuit diagram, FIG. 4 is a perspective view showing the positional relationship between the optical pickup and the guide rail of the present invention, and FIG. 5 is a perspective view showing the locking member.
6 and 7 are partial sectional views showing the positional relationship between the support member and the guide rail at the position of the lock member, respectively. Explanation of main drawing numbers, 1... light pick-up, 2 ...
...Support member, 3...Protrusion, 4...Lock member, 5
... Connection member, 6 ... Lever, 6b ... Notch, 7 ... Leaf switch, 17 ... Control signal generation circuit, 18 ... Motor drive circuit, 20 ... Motor, 19 ... Display drive circuit, 21 ……display.

Claims (1)

[Scope of utility model registration request] In an optical disk player in which an optical pickup for optically reading signals recorded on a disk is made slidable, a lock position that restricts sliding of the optical pickup and a lock position that restricts the sliding of the optical pickup are released. The locking member includes a locking member movably mounted to and from an unlocked position, a switch that is switched in accordance with the movement of the locking member, and a display whose display state is switched in accordance with the switching state of the switch, A fixing device for an optical pickup, characterized in that the indicator indicates that the locking member is in the locked position.