JPH0366082A - Optical system cleaning cartridge - Google Patents

Abstract

PURPOSE:To prevent a damage of a cleaning member due to misoperation by releasing lock of a cleaning member moving means of a cartridge synchronously with loading of a cleaning cartridge to a driver. CONSTITUTION:When an objective lens cleaning cartridge is loaded on a driver, members 108b, 108c are skided by a release member 108 pressed by a side plate of a cartridge holder to release the lock of a stopper 109 preventing the pressing of a rotary knob 110 and a cleaner 124 is moved in the optical axis direction of an objective lens 126. Thus, dirt given to surrounding due to a cleaner 124 drawn out of a cartridge main body 104 or damage given to the cleaner 124 due to pressing of a rotary knob 110 in mistake except in operation is prevented, and a damage to a driver or the cleaner 124 due to loading of the cartridge on the driver while pressing the rotary knob 110 is avoided.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is an optical system cleaning method that cleans the surface of an objective lens by converging and moving a round laser beam on the medium surface to write and reproduce information on a medium using a laser beam. Regarding cartridge C.

[Prior Art] Generally, in optical information recording and reproducing devices such as optical disk devices, a recording medium with a width of 1 to 2 μm and a length of 1 to 3 μm is used.
Information pits are recorded.

In order to read information from this information pit, first a light beam is focused onto a minute spot using an objective lens and is irradiated onto the information pit. At this time, the reflected light or transmitted light from the recording medium changes optically depending on the presence or absence of information. This change is detected electrically using a photodetector.

By detecting the information pits, a reproduction signal corresponding to the information pits can be obtained.

In such an optical disk device, it is extremely important that the minute spot always accurately scan the information pit row on the recording medium. For this purpose, autofocus is required to correct the focus shift caused by warping of the recording medium, and autotracking is required to correct the irradiation position shift due to eccentricity of the recording medium.

As a method for realizing this autofocus function and autotracking function, there is an objective lens driving device that moves an objective lens in an autofocus direction and an autotracking direction.

This device has a powerful magnetic circuit and a bearing sliding part that is machined with high precision, so it is usually free from dust and dirt from the outside.
A dustproof case is installed to prevent foreign matter such as dust from entering.
I'm being kicked. However, the upper surface of the objective lens and the movable range in the tracking direction are exposed as openings. For this reason, if dust from the outside adheres to the top surface of the objective lens, especially if foreign matter adheres to the center of the lens, it will not be possible to irradiate a laser spot with accurate laser power onto the disk surface, making it impossible to record information. - It had the disadvantage of causing poor playback.

[Problems to be Solved by the Invention] An object of the present invention is to provide a cleaning cartridge that can efficiently clean foreign matter such as dirt and dust adhering to the objective lens, which occurs in the above-mentioned conventional example.

[Means for Solving the Problems] When a malfunction in recording and/or reproducing information occurs due to foreign matter such as dirt or dust adhering to the surface of the objective lens, a cleaning cartridge is inserted into the drive device.

At this time, the cleaning member provided in the cleaning cartridge is located near the exit side of the objective lens in the optical axis direction, has means for moving up to the upper surface of the objective lens, and synchronizes with the insertion of the cleaning cartridge drive device. Unlocking the cartridge cleaning member moving means.

[Embodiment] FIG. 1 is a perspective view of an optical system cleaning cartridge for cleaning an objective lens of the present invention and a drive device into which this cartridge is loaded. FIG. 2 is a sectional view and a side view of the optical system cleaning cartridge of the present invention. FIG. 3 is a sectional view and a side view showing the optical system cleaning cartridge of the present invention with the replacement part removed.

FIG. 4(a) is a sectional view of the cartridge before the cleaning operation, and FIG. 4(b) is a sectional view of the cartridge during the cleaning operation. FIG. 5 is an enlarged sectional view of the cleaner of the cleaning member. FIG. 6 is a sectional view of the optical system cleaning cartridge of the present invention loaded into a drive device. FIG. 7 is a sectional view showing a mechanism for fixing the optical system cleaning cartridge of the present invention to the drive device when it is loaded into the device.

In the figure, 101 is an objective lens cleaning cartridge (main body + replacement part), 102 is a drive mounting device, and 10
Reference numeral 3 denotes an insertion slot into which a normal recording and/or reproduction disk cartridge and an objective lens cleaning cartridge are inserted, 104 a main body of the objective lens cleaning cartridge 101, and 105 a part of the cleaning section and moving means of the cartridge 101. The exchange part consists of 6
1.06a and 106b are lockers, and when the objective lens cleaning cartridge 101 is inserted into the drive device 102 as shown in FIGS. 2 and 7, the stopper located on the side plate of the cartridge holder 102a provided in the drive device Lock the main body lock springs 117a and 117b to the pins 102b and 102c, and then lock the cartridge 101.
is fixed to the cartridge holder 102a. Further, by pushing the rotation knob 110 in the direction of the arrow, the taper of the ratchet 111 moves the locking members 106a, 106b for preventing erroneous operation in the direction of the arrow in the force diagram, and locks the cleaning cartridge 101 to the front plate 102d of the drive device. Preventing it from being pulled out of the device 102. Moreover, 107a and 107b are springs C for returning the lockers 106a and 106b to their original positions when they are released. 108, when the cartridge is pushed into the cartridge holder 1028, the cartridge holder side plate moves in the direction of the arrow shown in FIG. This is a release member that allows movement in the direction of the arrow (rotary knob pushing direction). 108a is a release spring that returns the release member 108 to its original position. 109 is a stopper that locks the rotation knob 110 when not in use. 110 is a rotating knob for moving and rotating the cleaner moving member and the cleaner.

Reference numeral 111 denotes a ratchet, and a ratchet spring 112 allows the rotation knob 110 to rotate in only one direction. Reference numeral 113 is a positioning shaft that regulates the pushing stroke of the rotary knob. 114 is a click spring that temporarily locks the positioning shaft. Reference numeral 115 denotes a spring A that applies pressurization to the wire 121, the cleaner fixing base 122 made of metal such as aluminum, the elastic member 123 made of urethane or the like, and the cleaner 124 via the rotating member 116 and the wire fixing member 119 of the replacement part. Spring A is spring B11 provided on the replacement part side.
8, the load is larger for the same change.

120 is a guide for a wire 121; 121 is a wire made of a bendable close-contact coil spring; 122 is a cleaner fixing stand for fixing the wire; 123 is an elastic member in which a cleaning liquid sealed with a thin film is contained.

124 is a cleaner made of ultrafine fibers of polyester and nylon. An optical head 125 is equipped with an objective lens 126, its driving device, and an optical unit, and is movable by a linear motor 127 in the radial direction of an optical disk, which is an optical information recording medium. 128 is a turntable that holds an optical disc, and 129 is a spicy motor that rotates the disc.

With the above configuration, dirt, dust, etc. can be removed from the top surface of the objective lens 126.
When foreign matter such as oil adheres to an optical disk, which is an optical information recording medium, and information cannot be recorded and/or reproduced using normal laser power, the objective lens cleaning cartridge TOI shown in the figure is used.

When the objective lens cleaning cartridge 101 is inserted through the cartridge insertion port 103 of the drive device 102, the cartridge 101 is inserted into the cartridge holder 1.
Stopper pins 102b, 102c, which are cartridge positioning members guided along 028 and provided on both sides of the cartridge holder inner plate &: positioning ends 117c, 11 on both sides provided on the cartridge 101;
7d is abutted and positioned, and the main body lock spring 1 for positioning provided on the cartridge 101 is roughly positioned.
17a and 117b are locked, and the objective lens cleaning cartridge 101 is semi-fixedly locked to the cartridge holder 1028.

In this way, when the objective lens cleaning cartridge is inserted into the drive device, the cartridge is positioned in the drive device in the insertion direction and the withdrawal direction and is locked in a semi-fixed state. Good positioning is possible.

2) It is possible to prevent the relative position of the cleaning member and the objective lens from shifting due to movement of the cartridge during the cleaning operation.

Further, in this state, as shown in FIG. 7, the release member 108
By being pushed in the direction of the arrow in the figure by the side plate portion of the cartridge holder, the members 108b and 108c slide in the direction of the arrow in the figure, and the stopper 109 is unlocked.

Before the cartridge is inserted into the drive device, the cleaning member moving means is engaged with a locking member in a direction perpendicular to the moving direction C of the moving means to lock the cleaning member from moving in the protruding direction. By inserting the cartridge into the drive device in this state, a release member that can be interlocked with the locking member is provided protruding from the cartridge, and when the cartridge is inserted into the drive device and into the cartridge holder, the release member is released. By moving inward of the cartridge, the locking member interlocked with the releasing member synchronizes and moves in the direction of releasing the lock of the moving means, and the cleaning member is in a movable state, that is, the rotation knob is not moved. becomes possible. In this embodiment, the protrusion of the lock release member of the cartridge cleaning moving means is provided on the side surface of the cartridge, but it is also possible to provide the protrusion of the lock release member on the upper and lower surfaces of the cartridge.

In this way, in synchronization with the insertion of the drive device of the objective lens cleaning cartridge, the member protruding from the cartridge outer shape moves inward of the cartridge, unlocking the cleaning member moving means of the cartridge, and the cleaner cleans the objective lens light. By allowing the cleaner to move in the axial direction, 1) it prevents the cleaner from being pulled out of the cartridge by accidentally pressing the rotary knob when not in use, contaminating the cleaner, or damaging the cleaner.

2) Prevent damage to the drive device and cleaner by accidentally inserting the cartridge into the drive device while pressing the rotation knob, that is, while pulling out the cleaner from the cartridge.

Here, the rotary knob 110 is pushed and the ratchet 111 slides, and the lockers 106a and 106b protruding from both external sides of the cartridge slide as shown in FIG. This locks the direction in which the cartridge is pulled out from the drive device. In this embodiment, the cartridge drawer locking member protrudes from both sides of the cartridge, but it is also possible to lock the cartridge by protruding the locking member from the upper and lower surfaces of the cartridge or from one side.

In this way, when the objective lens cleaning cartridge is inserted into the drive device, the
A member protruding from the outer shape of the cartridge engages near the cartridge inside the drive device and locks the cartridge in the direction of pulling it out of the drive device. Prevent damage to the device and optical head.

2) Prevents damage to the cartridge cleaner caused by accidentally pulling out the cartridge from the drive device during the cleaning operation.

Also, at the same time as pressing the rotation knob 110, the positioning shaft 113
slides and is locked in the groove of the positioning shaft by the click spring 114, thereby determining the pushing stroke of the rotary knob 110.

Furthermore, the rotating member 116 is pushed via the spring A115, and then the wire fixing member 119 and the wire 121 on the exchange section side are pushed. When the spring B118 is pressed, the cleaner fixing base 1221 which is attached to the end of the wire 121 and the elastic member 123. When the cleaner 124 protrudes from the cleaning cartridge and moves toward the optical head as shown in FIG. 4, the optical head 125 moves from the center of the optical disk to an arbitrary position as shown in FIG. It is initially set from position B (a distance I1 from the center to the distance B') to a position at the outermost periphery of the optical disc (a distance I11 from the center A'). The optical heald 125 is located at this home position when the drive device is powered on.

Here, as shown in FIGS. 4, 5, and 6, the cleaner 124 is pressed against the upper surface of the objective lens 126 on the optical helad 125 due to the difference in load between the spring A 115, the spring B 118, and the elastic member 123.

In this way, the spring A is attached to a part of the cleaning member moving means.
115, by providing a preloading mechanism for the cleaner consisting of a spring B118, the amount of movement of the cleaner from the cartridge to the upper surface of the lens in the optical axis direction of the objective lens becomes smaller than the amount of movement of the rotary knob that operates the cleaning member moving means, that is, A load corresponding to the difference in the amount of movement between the cleaner and the cleaning member moving means is applied to the objective lens via the cleaner. Therefore, 1) Since the cleaner rotates while being in pressure contact with the objective lens, cleaning efficiency is improved.

2) Since the cleaner is in pressure contact with the objective lens, stable cleaning is possible by preventing the cleaner from floating due to variations in the vertical position of the cartridge.

Further, as shown in FIG. 5, the cleaning liquid 123a enclosed in the elastic member 123 and sealed in the thin film 123b breaks due to the pressure when the film 123b is pressed, and as shown in the shaded area in the figure. The elastic member 123 and the cleaner 124 are penetrated, and in this permeated state, the cleaner 124 is pressed against the upper surface of the objective lens 126, and by rotating the rotation knob 110, the cleaner 124 rotates and slides on the upper surface of the objective lens 126. Dust, dirt, oil, etc. on the 126 are removed by wet cleaning.In this way, the cleaning liquid is placed in a thin film inside the elastic member provided in the cleaning part to form a sealed structure, and the film is removed only when it is pressed against the lens during use. The following effects can be obtained by allowing the tear cleaning liquid to penetrate into the elastic member and the cleaner (polyester ultrafine fiber).

1) Wet cleaning becomes possible, allowing efficient cleaning of the objective lens.

2) Because the cleaning liquid is built into the cleaning part,
There is no need to apply cleaning liquid from the outside during use, making cleaning easy.

When cleaning the objective lens and replacing dirt with the cleaner 124, as shown in FIG.
6 and the wire fixing member 119 as boundaries, and the 0 separation that separates the objective lens cleaning cartridge body 104 and the replacement part 105 is the knob 105a, 10 of the replacement part 105 example.
By pressing 5b, the sliders 104a and 104b on the objective lens cleaning cartridge main body 104 side are pushed, and the locking members 105c and 105d on the replacement part 105 side are released and separated.

In this way, by configuring the exchange part including the cleaning member and a part of the moving means for the cleaning member and the main body part including the remaining moving means to be detachable, 1) the cleaning member and the cleaning member By making the replacement part including a part of the moving means removable, there is no need to replace small parts of the cleaning member, and the cleaning member can be easily replaced.

2) By replacing only the cleaning member, it is possible to prevent the cleaner from falling off due to the installation process, etc.

Also, clean the objective lens and use Cleaner 1.
When the dirt exchanger 24 is used, it is also possible to separate the wire 121 and the cleaner fixing stand 122 as a boundary, as shown in FIG. The cleaner fixing base 122, the elastic member 123, and the cleaner 124 are bonded together with an adhesive 123C. Wire 121 and cleaner fixing stand 122
As shown in FIG. 8, the wire 121 and the cleaner fixing base 122 are screwed together by a threaded portion provided on the cleaner fixing base 122, so that the cleaner 124 can be removed from the threaded portion after cleaning. This threaded portion is cut in the aperture direction when the cleaner 124 is rotated by the rotation knob 110. With this configuration, only the cleaning part (cleaner fixing stand, cleaner) needs to be replaced, so a low-cost cleaning cartridge can be provided.

The cleaner 124 is bonded to the tip end of the rotary knob 110 via a wire 121 made of a bendable tight coil spring. During the cleaning operation, the tip of the wire 121 passes through the guide portion 101b of the cartridge and is exposed from the opening 101C of the cartridge.

The cleaner 124 is brought into pressure contact with the objective lens 126, and by rotating the rotation knob 110, the cleaner 124 is brought into pressure contact with the objective lens 126.
4 rotates. Therefore, as shown in FIG. 9, the cleaner 124 moves eccentrically on the objective lens (A, B in the figure).
swing in the direction). Therefore, when rotating around the objective lens, dirt, grime, oil, etc. located particularly at the center of the objective lens can be efficiently removed. Since the cleaner 124 is provided via the wire 121 made of a bendable close coil spring, the means for moving and rotating the cleaner 124 can be simplified.

The outer diameter of the cleaner 124 is larger than the outer diameter of the elastic member 123, and the area of the surface of the cleaner 124 in contact with the objective lens 126 is larger than the outer diameter of the elastic member 123 of the cleaner 124.
It is larger than the area of the surface connected to 3. Therefore, dust, dirt, oil, etc. attached to the objective lens can be efficiently removed. In addition, the cleaner 124 and the elastic member 1
23, even if the adhesive slightly protrudes beyond the outer diameter of the elastic member 123, it does not protrude beyond the outer diameter of the cleaner 124, which prevents the adhesive from adhering to the objective lens. can be prevented.

FIG. 10 is a sectional view and a side view of another optical system cleaning cartridge of the present invention. FIG. 11 is a partially enlarged view illustrating the operation of the optical system cleaning cartridge shown in FIG. 10. Since the basic structure of the optical system cleaning cartridge shown in FIGS. 10 and 11 is the same as that of the optical system cleaning cartridge shown in FIG. 2, the same members are given the same reference numerals and their explanations will be omitted.

In the figure, 130 is a worm wheel which is rotated by the rotation of the worm gear 131.

135 is a rotation shaft provided between the rotation knob 110 and the positioning shaft 113. 132 is a worm rotating slide gear that transmits the rotation of the rotating shaft 135 to the worm gear 131. A slider 133 is slid by a pin 134 rotating on the worm wheel 130.

When the rotation knob 110 is pressed, the positioning shaft 113 slides and is locked by the click spring 114 in the groove of the positioning shaft. In parallel with this operation, as shown in the figure, due to the movement of the rotating shaft 135, the slider 133 and the worm rotating slide gear 132 slide the inner diameter part of the ohm gear 131 and move to position B (shown in FIG. 11). do.

When the cleaning operation is started in this state and the rotation knob is rotated, the rotation of the rotation shaft 135 is transmitted to the worm gear 131 and the worm wheel 130 is rotated. When the worm wheel 130 rotates and the pin 134 provided on the worm wheel 130 rotates once and reaches position B' (shown in FIG. 11), the predetermined number of rotations of the rotation knob are completed.

Furthermore, by rotating the rotary knob several times, the pin 134 is
It moves from the position 'A' (shown in FIG. 11) to the position A' (shown in FIG. 11).

At the same time, the slider 133 moves from position B (shown in FIG. 11) to position A (shown in FIG. 11). As the slider 133 moves, the rotary knob is unlocked, the cleaning member is housed in the cartridge, and the rotary knob returns to its original position, completing lens cleaning.

In an optical system cleaning cartridge having a cleaning member moving means for moving the cleaning member to a position near the objective lens, a part of the cleaning member moving means is provided with an automatic locking mechanism for the cleaning member moving means consisting of an ohm gear and a worm wheel, and A mechanism is provided for unlocking the cleaning member moving means and storing the cleaning member in the cartridge in synchronization with the rotation of a rotary knob for operating the means a certain number of times.

In this way, when the rotary knob for cleaning is rotated a predetermined number of times, the rotary knob is automatically unlocked, the rotary knob and the cleaning member return to their original positions, and lens cleaning is completed. By doing so, 1) The cleaning effect can be kept constant and the operability can be improved.

2) There is no need to count the number of rotations of the rotary knob.

FIG. 12 is a cross-sectional view of the optical system cleaning cartridge of the present invention loaded into a drive device. As shown in FIG. , the thickness dimension A of the optical system cleaning cartridge (shown in FIG. 12), and the height dimension A' of the cartridge insertion slot of the drive device (first
2), and BAA'> A. Therefore, the cartridge can be prevented from being accidentally inserted backwards into the drive device, and the objective lens can be cleaned safely. In this case, instead of the outer diameter of the rotary knob, its outer shape may be larger than the dimension in the thickness direction of the cartridge.

[Effects of the Invention] As described above, in synchronization with the insertion of the objective lens cleaning cartridge drive device, the member protruding from the outer shape of the cartridge moves toward the inside of the cartridge, thereby unlocking the cleaning member moving means of the cartridge. By allowing the cleaner to move in the direction of the optical axis of the objective lens: 1) Prevents the cleaner from being pulled out of the cartridge by accidentally pressing the rotary knob when not in use, contaminating it, or damaging the cleaner.

2) Prevent damage to the drive device and cleaner by accidentally inserting the cartridge into the drive device while pressing the rotation knob, that is, while pulling out the cleaner from the cartridge.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an optical system cleaning cartridge for cleaning an objective lens of the present invention and a drive device into which this cartridge is loaded. FIG. 2 is a sectional view and a side view of the optical system cleaning cartridge of the present invention. FIG. 3 is a sectional view and a side view showing the optical system cleaning cartridge of the present invention with the replacement part removed. FIG. 4(a) is a sectional view of the cartridge before the cleaning operation, and FIG. 4(b) is a sectional view of the cartridge during the cleaning operation. FIG. 5 is an enlarged sectional view of the cleaner of the cleaning member. FIG. 6 is a sectional view of the optical system cleaning cartridge of the present invention loaded into a drive device. FIG. 7 is a sectional view showing a mechanism for fixing the optical system cleaning cartridge of the present invention to the drive device when it is loaded into the device. 8 and 9 are enlarged sectional views of the cleaner of the cleaning member. FIG. 10 is a sectional view and a side view of another optical system cleaning cartridge of the present invention. FIG. 11 is a partially enlarged view illustrating the operation of the optical system cleaning cartridge shown in FIG. 10. FIG. 12 is a sectional view when the optical system cleaning cartridge of the present invention is loaded into a drive device. 01... Objective lens cleaning cartridge 02.
...Drive device 04...Cartridge body 05...Cartridge replacement part 21...Wire 22...Cleaner fixing base 23...Elastic member 24...Cleaner 26...Objective lens -558- [=ko((1) (b)

Claims (2)

[Claims] (1) A cleaning member that is loaded into an optical information recording and reproducing device that records and/or reproduces information by irradiating an information recording medium with a light beam using an objective lens, and moves the cleaning member to a position near the objective lens. An optical system cleaning cartridge having a moving means, characterized in that the cleaning member moving means of the cartridge is unlocked in synchronization with insertion of the optical system cleaning cartridge into a device. (2) When the optical system cleaning cartridge is inserted into the device, the cartridge is positioned in the device in the insertion direction and the withdrawal direction, and is locked in a semi-fixed state. Optical system cleaning cartridge as described.