JPS6364836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a movable body such as an optical system block of an optical video disc player that is movable in the radial direction of a disc, and a base that movably supports the movable body such as the optical system block. This invention relates to a shipping device that clamps between fixed members such as table blocks as necessary.

An optical video disc player is configured to irradiate a laser beam onto a video disc rotating at high speed, and detect the reflected beam with a detection means such as a photodetector to read recorded information signals. Therefore, in order to have the optical head track all the tracks from the inner recording track to the outer recording track of the disk, the optical system block including the optical head is supported so as to be movable in the radial direction of the disk. ing.

Since the optical system block is movable in this way, if an external shock is applied during transportation, it may damage the optical system block itself or the moving operation mechanism that operates it, which may impede accurate tracking operations. As a result, it becomes impossible to maintain good reproduction characteristics and reproduce video and audio signals. In particular, the track pitch of the disk is formed with a fine pattern of approximately 1.5μ. In order for the optical head to accurately track such minute recording tracks, it is necessary to sufficiently avoid slight deviations and errors in not only the optical system block but also the moving mechanism.

The present invention was proposed in view of the above circumstances, and is designed to prevent the moving body from moving unnecessarily during shipping or transportation of the product, and to sufficiently withstand external shocks and falls. This is what we are trying to do.

Further, the present invention makes it possible to clamp between a movable body and a fixing member that movably supports the movable body with a simple manual operation, and to easily perform this clamping operation and confirm the clamp position. It is something to rub.

Furthermore, the present invention allows the movable body to be easily moved to the clamp position by manual operation, and furthermore, the manual moving mechanism is configured such that it does not become inactive during automatic operation of the movable body and prevent the automatic movement operation. It is meant to be.

That is, in order to achieve the above objects, the present invention provides a movable body movably disposed relative to a fixed member, a position display means provided on the movable body for indicating the position of the movable body, and a a manual moving means for the movable body which is in an inoperative state position during an automatic movement operation and switches to an operable state position during a manual movement operation, and is lockable when the movable body is moved to a lock position by the manual movement means; The above-mentioned fixing member and fixing means are arranged relative to each other between the movable body.

An embodiment in which the present invention is applied to an optical system block supported movably in the radial direction of the disk in a video disk player will be described below.

FIG. 1 is an exploded perspective view showing a moving device portion of the optical system block 1.
is a laser tube 2 that emits a laser beam.
In addition, a case 3 is integrally provided with a built-in optical system element that forms an optical path for guiding the laser beam to the lower surface of the disk (not shown), and the case 3 further includes an objective lens 4 that constitutes an optical head facing the lower surface of the disk. is placed facing upward.

V grooves 5, 6 with two sides forming an angle of 90 degrees are cut in the longitudinal direction on both side surfaces 1A, 1B of the optical system block 1 in the moving direction. These V-grooves 5 and 6 serve as a cross roller mounting portion in which cross rollers constituting sliding means between the base block and the base block to be described later are mounted. Furthermore, a half nut 7 is integrally attached to the lower surface 1C of the optical system block 1, and has a semicircular threaded portion to be screwed into a feed screw, which will be described later.

Further, reference numeral 8 in FIG. 1 is a base block, and this base block 8 is fixedly supported by a mechanical chassis (not shown), and serves as a fixed side guide member that supports the optical system block 1 in a movable manner. A disk rotation drive motor 9 is disposed at the end of the base block 8. The base block 8 has a guide rail 1 having V grooves 10 and 11 opposite to each of the V grooves 5 and 6 of the optical system block 1.
2, 13 are provided, and these V grooves 5, 6 and 1
A gap for arranging cross rollers having a parallelogram cross section is maintained between 0 and 11. One guide rail 12 is integrally formed with the base block 8, and the other guide rail 13 is detachably attached to the base block 8 with a mounting screw 13A. It is configured so that it can be easily attached to and detached from the holder. In addition, 13B is a through hole for screw insertion drilled in the other guide rail 13,
13C is a screw hole into which the mounting screw 13A is screwed.

Further, on the base block 8, a long rod-shaped feed screw 14 for moving and operating the optical system block 1 has both ends 14A and 14B connected to the base block 8.
It is rotatably supported by bearing parts 15 and 16 that stand up from the ground. A wheel gear 17 that is transmitted to a manual operation section (described later) is integrally attached to one end 14A of the feed screw 14, and the other end 14A
4B has a wheel gear 18 for transmitting motor driving force.
are integrally attached to the shaft. The feed screw 14 is
Depending on the operation mode, either one of the pair of optical system block transport motors 19, 20 is rotationally driven. These motors 19, 20 are connected to the clutch 19
Output gears 19B and 20B of A and 20A are meshed with the wheel gear 18 and connected to the feed screw 14. Note that one optical system block transport motor 19 is for normal access, and the other optical system block transport motor 20 is for random access.

The half nut 7 of the optical system block 1 is screwed onto the feed screw 14.
4 is rotationally driven, the optical system block 1 is moved in the axial direction of the feed screw 14.

Therefore, in the present invention, the optical system block 1, which is movable with respect to the base block 8 as described above, can be locked at a predetermined position with respect to the base block 8.

First, the means for moving the optical system block 8 by manual operation and the position display means for displaying the moving position of the optical system block 8 will be explained with reference to FIGS. 2 and 3.

In FIGS. 2 and 3, 21 is a gear wheel for manual operation, and this gear wheel 21 is operated by engaging and supporting a shaft portion 22 in an elongated bearing hole 24 formed in a chassis 23. It can freely move up and down along this bearing hole 24. The gear wheel 21 is pulled downward in FIGS. 2A and 3A by a pullback spring 25, and the shaft portion 22 is locked in the lower end 24A of the bearing hole 24. Note that a portion 21A of the outer peripheral side of this gear wheel 21 is protruded to the outside of the chassis 23,
It can be rotated from outside the main body of the device.
Further, on the upper side of the gear wheel 21, a second
As shown in Figure A and Figure 3A, the feed screw 1
An intermediate gear 26A meshed with the wheel gear 17 provided at 4 and a driving force transmission gear 26B meshed with the intermediate gear 26A are provided.

By the way, the feed screw 14 is normally automatically rotated by the optical system block transfer motor 19 or 20 by turning on a motor drive circuit (not shown), and the optical system block 1 is automatically moved. When attempting to move the optical system block 1 manually, the user presses the finger against the portion 21A of the gear wheel 21, resisting the pulling force of the pullback spring 25 as shown in FIGS. 2B and 3. Push up in the direction of arrow Y in B. When pushed up in this manner, the gear wheel 21 is moved upward with the shaft portion 22 guided by the bearing hole 24 and meshed with the driving force transmission gear 26B. While pushing upward like this, press the gear wheel 2
When the optical system block 1 is rotated, the wheel gear 17 is rotated via the driving force transmission gear 26B and the intermediate gear 26A, the feed screw 14 is manually rotated, and the optical system block 1 can be moved.

Further, when the pressing state is released from the state shown in FIG. 2B and FIG.
6B, and move the shaft portion 22 downward while being guided through the bearing hole 24, to the return position shown in FIGS. 2A and 3A, where the shaft portion 22 is locked to the lower end 24A of the bearing hole 24. be reinstated. A bulging portion 22A having a diameter larger than the width of the bearing hole 24 is formed at the end of the shaft portion 22 to prevent the shaft portion 22 from coming out of the bearing hole 24 and to prevent the shaft portion 22 from coming off in the axial direction. movement of the gear wheel 21 is restricted to ensure reliable meshing of the gear wheel 21 with the driving force transmission gear 26B.

Next, as shown in FIGS. 2 and 3, the position display means includes a support arm 27 that extends downwardly from the lower surface of the optical system block 1 and has a pointer section 27A at its tip; As shown in the figure, it consists of a reference scale 29 protruding from one side of a transparent indicator window 28 formed on the bottom surface of an outer casing 40 constituting the main body of the device. That is, the support arm 27
When optical system block 1 reaches the predetermined position,
A pointer portion 27A is provided on the optical system block 1 so as to face the indicator window 28. When the optical system block 1 reaches a lockable position as described later, by arranging the pointer 27A and the reference scale 29 so that they coincide, it is easy to locate the lockable position of the optical system block 1. Confirmation can be easily confirmed from the outside of the outer casing 40.

Next, as shown in FIGS. 4A and 4B, the fixing means for locking the optical system block 1 in the lock position includes an engagement hole 30 formed on the lower surface 1C side of the optical system block 1 and a base block. 8 and a lock pin 31 disposed at the top.

As shown in FIGS. 4A and 4B, the engagement hole 30 is formed so as to face the base block 8 so that the lock pin 31 can be engaged and disengaged therefrom.

Further, the lock pin 31 has a retaining piece 31B such as an E-ring fitted in the middle part thereof, and the distal end side of the retaining piece 31B is inserted into the fitting part 30 into the engagement hole 30.
A, a male thread 31C is formed on the base end side, and a head 31D with a coin engaging groove 31E carved on the base end is formed to bulge out. This lock pin 31 has a fitting portion 30A on the tip side that is connected to the engagement hole 3.
It is disposed vertically movably within a lock pin hole 32 formed in the base block 8 so as to protrude toward the zero side.
That is, as shown in FIG. 4A, the lock pin 31 is prevented from coming off by locking the retaining piece 31B in the middle of the lock pin hole 32 to the periphery of the lock pin hole 32, and the engaging portion 30A is placed on the engaging hole 30 side. It is inserted and supported in the lock pin hole 32 in a protruding state. A large diameter spring housing portion 32A is formed in the middle of the lock pin hole 32, and a pullback spring 33 wound around the lock pin 31 is housed therein. The pullback spring 33 is wound between the locking piece F, such as an E-ring, fitted to the middle part of the lower end of the lock pin 31 and the spring storage portion 32A, so that the lock pin 31 is always kept in the engagement position. It is pulled back and biased in the direction away from the hole 30. Also,
A fitting portion 30 is provided on the lower end side of the lock pin hole 32.
A female screw 32B is cut into the lock pin 31 so that it screws into the male screw 31C of the lock pin 31 when the pin A is engaged with the engagement hole 30.

The lock pin 31 is disposed at a position below the movement locus of the engagement hole 30 as the optical system block 1 moves, and when the optical system block 1 is moved, the lock pin 31 connects the engagement hole 30 with the fitting portion 30A at the tip. When the two face each other and reach a state where they can be engaged, the pointer portion 27A of the display means and the indication scale 29 are arranged to coincide with each other. In addition, the lock pin 31
When the optical system block 1 is not locked, which prevents the fitting portion 30A from engaging with the engagement hole 30, as shown in FIG. It is screwed back from the female screw 32B. Then, the fitting portion 30A is engaged with the engagement hole 30 to remove the optical system block 1.
When the optical system block 1 is locked, the male screw 31C screws into the female screw 32B, as shown in FIG. 4B, and the optical system block 1 is securely locked.

In the shipping device configured as described above, during normal access or random access during normal use, the gear wheel 21 is separated from the transmission gear 26B;
Moreover, since the lock pin 31 is out of the lock hole 30, the optical system block transfer motor 19
Alternatively, the optical system block 1 is automatically moved in the radial direction of the disk by the rotational drive of the optical system block 20. On the other hand, during shipping or transportation, when the gear wheel 21 is pushed up and rotated, the optical system block 1 is moved by the manual operation force, and the amount of this movement is measured by the pointer of the display means. Since the lock position can be confirmed while looking at the lock position, it can be easily moved to the lock position by manual operation. After setting the lock position to the lock position, use a coin to tighten the lock pin 31, and the optical system block 1 will be easily and reliably connected to the base block 8. They are integrally engaged and fixed. Therefore, the originally movable optical system block 1 is fixed to the base block 8.

As mentioned above, in the present invention, a movable body such as an optical system block can be clamped to a fixed member such as a base block that supports this movable body, so there is no need for a movable body when shipping or transporting the product. In addition, the movable body and the fixed member that movably supports the movable body can be clamped with a simple manual operation. This clamp operation and confirmation of the clamp position can be easily performed.

Furthermore, the movable body can be easily moved to the clamp position by manual operation, and the manual moving mechanism does not become inactive during automatic operation of the movable body and does not interfere with the automatic movement operation.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the outline of the main parts of the optical system block of a video disk player. Second
The figures are front views showing the manual moving means and the display means, with FIG. 2A showing the automatic moving state and FIG. 2B showing the manual moving state. Figure 3 is also a side view,
FIG. 3A shows the automatic movement, and FIG. 2B shows the manual movement. FIG. 4 is a side cross-sectional view showing the locking means, FIG. 4A is when the lock is not locked, and FIG. 4B is when the lock is locked. FIG. 5 is a bottom view showing the indicator and the operating section. 1... Optical system block as a moving body, 8...
Base block as a fixing member, 21... Gear wheel, 22... Shaft portion, 24... Bearing hole, 25...
...Retraction spring, 27A...Pointer section, 30...Lock hole, 31...Lock pin.

Claims (1)

[Claims] 1 A movable body disposed movably with respect to a fixed member, a position display means provided on the movable body for indicating the position of the movable body, and a position indicating the position of the movable body that is in an inactive state during an automatic movement operation of the movable body, and a manual movement operation. A manual moving means for the movable body, which is sometimes switched to an operable state position, and a movable body disposed relative to the fixed member that can be locked when the movable body is moved to a locked position by the manual moving means. and a securing means.