JPH0447770Y2 - - 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. Regarding.

(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 are recorded have become popular. As shown in Japanese Utility Model Application No. 59-71471, the disk player has an optical pickup mounted on a support member that slides on two mutually parallel guide rails consisting of a shaft disposed on a chassis. There is also a device in which the optical pickup is moved in the radial direction of the disk by driving the support member to perform disk playback.

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.

By the way, in recent years, small stereo sets called minicomputers have become popular. Among the minicomputers, there are many popular minicomputers that have an amplifier, tuner, and tape deck built into the same housing to reduce costs. Recently, minicomputers like this one with a built-in CD player have also started appearing. In conventional minicomputers of this type, the CD player was placed at the bottom or top of the case, so the optical pickup could be protected from shock during transportation using fixing parts. That is, although the fixing parts for fixing the optical pickup usually need to be removed using a tool such as a screwdriver, the CD player is installed so that the optical pickup is placed in a position where the tool can be reached from outside the housing. This is because

(c) Problems that the invention attempts to solve However, from the viewpoint of operability and design, CD
There are cases where it is desired to place the player in the middle of the housing. In that case, the optical pickup can be fixed by slightly rotating the fixing part, and a long lever is connected and fixed to the fixing part, and the lever can be operated from outside the housing. It is conceivable to rotate the fixing part by operating it and fix the optical pickup, but since this method involves operating a long lever, a strong force is applied to the fixing part due to the lever principle. There was a fear that the optical pickup would be damaged by the fixing parts.

The present invention aims to provide a fixing device for an optical pickup that has been made in view of the above points.

(d) Means for Solving the Problems The optical pickup fixing device according to the present invention includes a protrusion provided on a support member and an engaging portion with which the protrusion is engaged. a lock member attached to a chassis so as to be rotatable between a locked position where the engaging part and the protrusion are engaged and an unlocked position where the engaging part and the protrusion are disengaged; A connecting member having one end fixed to the member, and a substantially V-shape that is rotatably attached to the chassis around a shaft provided offset to one end, and the other end of the connecting member is loosely fitted to one end. It consists of a lever with a notch in the shape of a shape.

(E) Function The present invention is such that when the locking member is in the non-locking position, the other end of the connecting member is brought into contact with the inner wall of the inner wall of the notch of the lever, and when the locking member is in the vicinity of the locking position, , the other end of the connecting member is brought into contact with the inner wall of the opening of the notch of the lever, and when the other end of the lever is rotated, the rotational force of the locking member is applied when the locking member approaches the locking position. It is weakened.

(f) Example Figures 1 and 2 show an example of the present invention.
1 shows an optical pickup, 2 a support member on which the optical pickup 1 is placed, 3 a protrusion provided on the support member 2 , and 4 Reference numeral 5 indicates a locking member that is rotatable around the shaft 4a, 5 is a connecting member that has one end fixed to the locking member 4, and 6 is a linking member that is rotatable around the shaft 6a and has one end fixed to the locking member 4. The lever is provided with a substantially V-shaped notch 7 into which the other end of the connecting member 5 is loosely fitted.

As shown in FIG. 3, the support member 2 includes a mounting part 8 on which the central optical pickup 1 is mounted, first and second guide rails 10 fixed to a chassis 9 parallel to each other at one end, and It consists of a sliding part 12 that slides on the first guide rail 10 of 11, and a driving part 14 on which a rack 13 is formed at the other end,
The mounting portion 8 is made of a metal plate from the viewpoint of strength,
The sliding part 12 and the driving part 14 are made of a synthetic resin material from the viewpoint of ease of molding and slippage. As shown in FIG. 5, which is a partial sectional view from the front of FIG. 3, a locking piece 15 having a claw 15a is projected from the bottom surface of the sliding portion 12.
The claw 15a is positioned below the rib 10a provided on the side surface of the first guide rail 10. 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 system components of the optical pickup 1 are incorporated, and the base 16 is connected to the support member 2. It is designed to be slid along with the sliding of.

As shown in FIG. 4, the locking member 4 has a U-shaped notch 4b formed in the center that serves as an engaging part to be engaged with the protrusion 3, a tapered part 4c at the tip, and a tapered part 4c in the upper part. A connecting member 5 is fixed and rotatably attached to the chassis 9.

Assume that the locking member 4 is now in the unlocked position shown in FIG. In this case, as shown in FIG. 5, the sliding part 12 of the support member 2 is placed on the upper surface of the first guide rail 10, and the claw 15a of the locking piece 15 is attached to the rib 10a of the first guide rail 10. is not in contact with the Therefore, when a disk is played or searched and a motor (not shown) rotates, the rotation of the motor is transmitted to the pinion 17 via a transmission mechanism (not shown), and the rotation of the pinion 17 is supported. The rotation of the pinion 17 causes the support member 2 to slide in the direction of the arrow A or B as the rotation of the pinion 17 is transmitted to the rack 13 provided on the side surface of the drive portion 14 of the member 2.

During transportation, first slide the support member 2 to the position closest to the turntable 18 on which the disk is placed, and then slide the support member 2 to the position closest to the turntable 18 on which the disk is placed. The knob 20 provided at the other end is operated in the direction of arrow C. Then, one end of the lever 6 rotates in the direction of arrow D around the shaft 6a. In this case, since the shaft 6a is provided at a position that is considerably offset from the center of the lever 6 to one end of the lever 6,
Compared to the moving distance of the other end of the lever 6,
The movement distance of one end is small, and the operation of the other end requires only a weak force due to the lever principle. Further, a substantially V-shaped notch 7 is formed at one end of the lever 6, and the other end of the connecting member 5 is loosely fitted into the notch 7, but when the locking member 4 is in the non-locking position, The tip of the other end of the connecting member 5 is in contact with the inner wall of the inner wall of the notch 7 (near the point X), and the tip of the connecting member 5 is rounded.
Therefore, when one end of the lever 6 rotates in the direction of arrow D, the tip of the connecting member 5 slides along the inner wall of the notch 7. When the tip of the connecting member 5 slides along the inner wall of the notch 7, a force in the direction of arrow E is applied to the connecting member 5, so that the locking member 4 moves in the direction of arrow E around the shaft 4a. Rotate to. When the locking member 4 rotates, the tapered portion 4c of the locking member 4 is inserted 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 E, the tapered portion 4c
c, the thicker part is gradually inserted between the sliding part 12 and the chassis 9, and the notch 4b of the locking member 4 and the protrusion 3 provided on the lower surface of the sliding part 12 are connected. Engagement takes place. Here, when the operating distance of the lever 6 reaches a predetermined amount and the notch 4b and the protrusion 3 are engaged by a predetermined amount, the other end of the connecting member 5 comes into contact with the inner wall of the notch 7 of the lever 6. The point of contact is from near point X in Figure 1 to Y in Figure 2.
transition to a point. Therefore, since the force applied to the connecting member 5 approaches the shaft 4a of the locking member 4, if the force for operating the lever 6 is constant, the rotational force applied to the locking member 4 weakens. Therefore, the notch 4b of the lock member 4 and the projection 3 are engaged with a weak force from the middle, so that the impact on the support member 2 due to the rotational force of the lock member 4 is alleviated.

By the way, as the tapered part 4c of the lock member 4 is inserted between the sliding part 12 and the chassis 9,
When the notch 4b of the locking member 4 and the protrusion 3 are engaged, the thickest part of the tapered part 4c is made thicker than the distance between the sliding part 12 and the chassis 9. Therefore, due to the abutting force of the tapered portion 4c on the sliding portion 12,
Since the support member 2 is rotated about the second guide rail 11, the support member 2 is pushed upward by the rotation of the lock member 4 in the direction of arrow E. Then, when the support member 2 is pushed up by a predetermined amount,
As shown in FIG. 6, the claw 15a of the locking piece 15 is
Since it comes into contact with the rib 10a of the guide rail 10, the knob 20 is operated in the direction of arrow C to rotate the lock member 4. In this state, that is, the state in which the locking member 4 is in the locked position, the engagement between the notch 4b of the locking member 4 and the protrusion 3 is completed as shown in FIG. The sliding movement of the support member 2 is restricted by being gripped by the tip and base of the support member 4. Also, at this time, the locking piece 1 of the sliding portion 12
5 claw 15a and the rib 10 of the first guide rail 10
The sliding movement of the support member 2 is also restricted by the force of contact with the support member a.

On the other hand, in order to release the sliding restriction of the support member 2 by the lock member 4, the knob 20 may be operated in the direction of arrow F in FIG. When the knob 20 is operated in the direction of arrow F, the other end of the lever 6 is rotated in the direction of arrow F, and one end of the lever 6 is rotated in the direction of arrow G. When one end of the lever 6 rotates in the direction of arrow G, a force in the direction of arrow H is applied to the connecting member 5, so that the locking member 4 rotates in the direction of arrow H. Therefore, when the knob 20 is operated in the direction of arrow F to a predetermined position, the locking member 4 is rotated to the unlocked position shown in FIG. 1, and the sliding movement of the supporting member 2 is released. Incidentally, when one end of the lever 6 is rotated in the direction of arrow G, the tip of the connecting member 5 is attached to the lever on a side different from the inner wall on which it slides when the one end of the lever 6 is rotated in the direction of arrow D. 6 is slid along the inner wall of the notch 7, but the notch 7
has a substantially V-shape that is symmetrical with respect to the center line of the lever 6 passing on the shaft 6a, so that the rotational force of the locking member 4 is reduced when the locking member 4 is rotated from the non-locking position to the locking position. On the contrary, it is weak at first and then becomes strong.

(g) Effects of the invention As described above, the optical pick-up fixing device according to the present invention protects the optical pick-up from impact during transportation even when the optical pick-up is located far away from the panel surface that constitutes the housing. be able to,
Moreover, this has a great practical effect in that the force applied when fixing the optical pickup does not damage the optical pickup and the support member that supports the optical pickup.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
3 is a perspective view showing the positional relationship between the optical pickup of the present invention and the guide rail, FIG. 4 is a perspective view showing the locking member, and FIG. 5 is a plan view showing the locking member in the unlocked position. and FIG. 6 are partial sectional views showing the positional relationship between the support member and the guide rail at the position of the lock member. Explanation of main drawing numbers, 1... light pick-up, 2 ...
...Support member, 3...Protrusion, 4...Lock member, 5
...Connecting member, 6...Lever, 7...Notch.

Claims (1)

[Scope of utility model registration request] In an optical disk player, an optical pickup for optically reading out signals recorded on a disk is mounted, and a support member is provided to be slidable by a guide rail arranged on a chassis, and the support member is provided with a A protrusion provided therein and an engaging portion that engages with the protrusion are formed, and a lock position where the engaging portion and the protrusion are engaged and the engagement between the engaging portion and the protrusion are formed. A locking member is attached to the chassis so as to be rotatable between the unlocked and unlocked positions, a connecting member has one end fixed to the locking member, and the coupling member is attached to the chassis around a shaft provided offset to one end. Approximately V is rotatably attached and the other end of the connecting member is loosely fitted to one end
It consists of a lever with a letter-shaped notch,
When the locking member is in the unlocked position, the other end of the connecting member is brought into contact with the inner wall of the inner wall of the notch of the lever, and when the locking member is in the vicinity of the locking position, the connecting member is The other end of the lever is brought into contact with the inner wall of the opening of the notch of the lever, so that when the other end of the lever is rotated, the rotational force of the locking member is weakened when the locking member approaches the locking position. Optical pickup fixing device.