JP2001319436A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device such that an optical component is prevented from being broken even when a device main body falls. SOLUTION: A buffer 7 is provided at the terminal end of a main shaft 12 and a leaf spring 6 is provided at the terminal end of a sub-shaft 2 to buffer a shock level when the device main body receives a falling shock by the buffer 7 and the spring 6 and to form a regulation wall 6a at the base end part of the spring 6 to reduce the breakage of the spring 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an optical disk device.

[0002]

2. Description of the Related Art In recent years, miniaturization and high performance of an optical disk apparatus which reads and reproduces data by an pickup unit using an optical disk as a recording medium have been advanced, and a mini disk (hereinafter referred to as MD) has been used as a portable optical disk apparatus. Portable MD players have become popular.

A conventional optical disk device will be described below with reference to FIGS. 6 and 7, taking a portable MD player disclosed in Japanese Patent Application Laid-Open No. 11-96747 as an example.
FIG. 6A shows the upper lid 16a of a portable MD player.
6A and 6B show a state in which the upper cover 16a is closed.

The outer case 16 of a portable MD player
Consists of an upper lid 16a that can be opened and closed and a lower case 16b that rotatably holds the upper lid 16a. Optical disk 10
Various information such as music information is recorded in the outer case 16 with the upper lid 16a opened while being stored in the MD case 18, and the spindle motor 14 is disposed at the substantially center of the lower case 16b. The optical disk 10 is mounted on the turntable 17 so as to be mounted thereon, and the upper lid 16a
Is closed.

[0005] Inside the lower case 16b, a pickup unit 9 holding an optical component 11 such as a lens or a suspension wire is held by a base 8, and the base 8 is disposed in parallel with the chassis 1. It is engaged with a feed shaft 12 as a main shaft and a guide rib 2 as a sub shaft.

When the optical disk 10 is driven to rotate by the spindle motor 14, the feed shaft 12 comprising a screw shaft drives the pickup unit 9 in the radial direction of the optical disk 10 (the direction of arrow X or Y) to access the optical disk 10. It is configured to be.

[0007] Inside the lower case 16b, electric components and electric circuits necessary for reproducing information from the optical disk 10 are arranged below a feed mechanism 13 including a feed shaft 12 and the like. 19 is a gum type battery.

In the portable MD player configured as described above, even if the pickup unit 9 moves in the radial direction of the optical disk 10, the pickup is set so that the focal length of the lens of the optical component 11 matches the recording surface of the optical disk 10. Since the relative distance between the unit 9 and the optical disk 10 is adjusted, music information can be reproduced by reading information on the recording surface of the optical disk 10.

[0009]

However, in the above-mentioned conventional portable MD player, the user may drop the main body of the apparatus or give vibrations when using the MD player. It may move beyond the movable range and collide with the inner walls 1a and 1b of the chassis 1.

As a result, the pickup unit 9 includes:
For example, there is a problem that the lens constituting the optical component 11 is deteriorated such as cracking or chipping or bending of the suspension wire, so that information on the optical disc 10 cannot be read accurately.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide an optical disk apparatus capable of reducing the deterioration of the pickup unit even if the apparatus main body receives an impact.

[0012]

According to the present invention, there is provided an optical disk apparatus comprising a buffer and a leaf spring at a terminal end of a main shaft and a terminal end of a sub shaft for preventing deterioration when a pickup unit exceeds a normal range of movement in a radial direction. Are provided.

According to the present invention, it is possible to realize an optical disk apparatus capable of reducing the shock level by the shock absorber and the leaf spring even if it receives a strong shock such as dropping, thereby reducing the deterioration of the pickup unit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk apparatus according to a first aspect of the present invention is configured such that a base holding a pickup unit for accessing an optical disk is engaged with a main shaft and a sub shaft arranged in parallel with each other on a chassis. An optical disk drive for driving the main shaft consisting of a screw shaft to move the main shaft in the radial direction of the optical disk, wherein the base is moved to the end of the main shaft at the end of the main shaft and abuts against the side wall of the base. A resin plate that is provided with a cushioning member that abuts against the collision to cushion the collision, and in which the base abuts on a side wall of the base while the base is moved to the end of the main shaft at the end of the countershaft. A spring is provided, and the shock absorber and the leaf spring buffer an impact level when the apparatus body receives an impact, and a distal end of the leaf spring is more elastic than a prescribed one at a base end of the leaf spring. In the deformed state on the side wall of the base Contact with, characterized in that the formation of the restricting wall for restricting elastic deformation of the tip of the leaf spring.

According to this configuration, even if a strong impact such as a drop is received, the shock level is reduced by the buffer and the leaf spring, and the deterioration of the pickup unit can be reduced. An optical disk device according to a second aspect of the present invention is the optical disk device according to the first aspect, wherein the leaf spring is formed by outsert molding on a chassis.

According to this configuration, a highly reliable optical disk device can be easily realized. According to a third aspect of the present invention, in the optical disk device according to the first aspect, the contact position between the leaf spring and the side wall of the base is set on a line passing through a center of gravity of a moving body including the pickup unit and the base. It is characterized by being configured to be located.

According to this configuration, the side wall of the base and the leaf spring are in contact with each other without extra movement such as rolling, so that deterioration and damage of the pickup unit can be reduced. Hereinafter, a portable MD player will be described as an example of the optical disk device of the present invention, and a description will be given based on specific embodiments with reference to FIGS.

6 and 7 showing the above-mentioned conventional example will be described with the same reference numerals. (Embodiment) FIG. 1 is a plan view of a chassis of an assembled portable MD player, and FIG. 2 is a perspective view of a rear side of the chassis.

In the optical disk device constructed in the same manner as in FIGS. 6 and 7 showing the conventional example, in this embodiment, the pickup unit 9 is provided in order to reduce the deterioration of the pickup unit 9 due to an impact such as dropping. Outside the normal movement range of the shock absorber 7 and the leaf spring 6
Is provided.

More specifically, when accessing the optical disk, the pickup unit 9 moves from the innermost position R1 where the information on the optical disk can be read to the outermost position R2 where the information on the optical disk indicated by the broken line A can be read. It is configured to be driven along the radial direction of the optical disc.

A buffer 7 is provided at an end of the feed shaft 12 as a main shaft in a region inside the normal movement range R1-R2 inside R1 and a resin material is provided at an end of the guide rib 2 as a sub shaft. Is provided.

As shown in FIGS. 3 and 4, a cushioning rubber is used as the cushioning member 7 here.
2 at the end. The feed shaft 12 provided with the buffer 7 is inserted into a hole 8c of the base 8 and held by a bearing 3b provided on the chassis 1, and further provided with a bearing 3a and a presser 4 provided at the center of the chassis 1. Is held by A gear 15 is provided at one end of the feed shaft 12 so as to receive a driving force by a feed mechanism (not shown), and is rotatably held by the chassis 1.

The feed shaft 12 configured as described above
A tip 5a of a nut plate 5 made of a spring material and arranged below the base 8 is engaged with the groove. On the other hand, a leaf spring 6 made of resin provided at the end of the guide rib 2 has a distal end 6b in the moving direction of the pickup unit 9, that is, an optical disk, so as to buffer the impact when the base 8 collides due to, for example, dropping. Is easy to bend in the radial direction. In addition, when the distal end portion 6b is elastically deformed more than a prescribed state, the proximal end portion contacts the side wall 8a of the base 8 to prevent the leaf spring 6 from being broken or damaged.
A restricting wall 6a restricts the elastic deformation of b.

When the pickup unit 9 is at the position R1, a gap d1 is formed between the side wall 8a of the base 8 and the buffer body 7 in the buffer body 7 and the leaf spring 6 configured as described above. A gap d2 is provided between the side wall 8a of the base 8 and the distal end 6b of the leaf spring 6, and the gap d1 and the gap d2 are arranged to be substantially the same size.

Further, a gap d3 larger than the gaps d1, d2 is arranged between the side wall 8a of the base 8 and the regulating wall 6a. The thickness d4 of the leaf spring 6 is substantially the same as the thickness d5 of the base 8.

Hereinafter, the portable MD configured as described above will be described.
A case where the player falls in the direction of arrow E due to carelessness of the user will be described as an example. As shown in FIG. 5, the pickup unit 9 moves in the normal movement range R1-R.
2, the tip 6b of the leaf spring 6
It is at the position shown by the broken line.

However, if a large impact is applied due to a drop or the like, the engagement between the tip 5a of the nut plate 5 and the groove of the feed shaft 12 is released. Since the nut plate 5 is made of a spring material, the nut plate 5 itself does not break down even if the nut plate 5 rides on the groove of the feed shaft 12, but when the feed shaft 12 rotates, the tip 5a of the nut plate 5 becomes the feed shaft. 12, the pickup unit 9 moves in the direction of the arrow “E”, and moves in the normal movement range R1-R2.
And moves to a region inside R1.

As a result, the gap d1 between the side wall 8a of the base 8 and the buffer 7 and the gap d2 between the side wall 8a of the base 8 and the distal end 6b of the leaf spring 6 are eliminated, and in the conventional portable MD player described above. In addition, the base 8 holding the pickup unit 9 collides with the chassis 1 and the pickup unit 9 is broken or deteriorated.

However, in the portable MD player in this (embodiment), the pickup unit 9
Is moved inward from the position, the base 8 holding the pickup unit 9 comes into contact with the buffer 7, so that the shock level received by the apparatus main body can be buffered.

When the distal end portion 6b of the leaf spring 6 in the state shown by the broken line abuts on the side wall 8a of the base 8, it is elastically deformed to the state shown by the solid line, similarly damping the impact level. At this time, since the thickness d4 of the leaf spring 6 is configured to be substantially the same as the thickness d5 of the base 8, the tip of the leaf spring 6 is parallel to the surface of the turntable 17, and the pickup unit 9 and the base 8 The side wall 8a of the base 8 and the leaf spring 6 can buffer the shock level without extra movement such as rolling, and prevent the pickup unit 9 from being deteriorated or damaged. Can be reduced.

Further, a more intense impact is applied to the leaf spring 6.
When the distal end portion 6b is elastically deformed more than specified, a regulating wall 6a is formed at the base end of the leaf spring 6, and the side wall 8a of the base 8 and the regulating wall 6a Since the gap d3 between them is set to be larger than the gaps d1 and d2, the side wall 8a of the base 8 contacts the regulating wall 6a and
Breakage and breakage can be reduced.

Therefore, even if the portable MD player is repeatedly subjected to a severe impact such as a drop due to the carelessness of the user, the level of the impact applied to the entire apparatus is reduced as described above, and the damage and deterioration of the pickup unit 9 are reduced. And a highly reliable optical disk device can be realized.

In the above description, the case where the pickup unit 9 moves inward of R1 beyond the normal movement range R1-R2 has been described. However, the present invention is not limited to this, and the present invention is not limited thereto. The same configuration can be applied to the case in which both move outward.

In the above description, the leaf spring 6 is attached to the chassis 1 via the guide ribs 2. However, if the leaf spring 6 is outsert molded to the chassis 1, the position accuracy is improved and the work of attaching another part is performed. Is not required, so that production efficiency can be improved.

In the above description, when the pickup unit 9 is at the position R1, the gap d1 between the base 8 and the cushioning rubber 7, and the gap d between the base 8 and the tip 6b of the leaf spring 6 are set.
2, the gap d1 and the gap d2 do not necessarily have to be the same size. However, the gap d1 between the base 8 and the tip 6b of the leaf spring 6 at the same position
It is necessary to make the gap d3 between the base 8 and the regulating wall 6a larger than in order to obtain the effect of the above embodiment.

[0036]

As described above, according to the optical disk apparatus of the present invention, by providing a buffer at the end of the main shaft and providing a leaf spring made of resin at the end of the sub-shaft, the pickup unit can be moved by a shock such as dropping. Even if it deviates from the normal movement range, the base holding the pickup unit abuts on the buffer and the leaf spring, thereby reducing the impact level received by the entire apparatus and reducing the damage and deterioration of the pickup unit. . Further, since a restricting wall for restricting elastic deformation of the distal end portion is formed at a base end portion of the leaf spring, another portion of the base abuts on the restricting wall even when a greater impact is applied. Damage and deterioration can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an assembled chassis according to an embodiment of the present invention.

FIG. 2 is a perspective view of a chassis on the back side of FIG. 1;

FIG. 3 is a sectional view taken along line T1-T2 in FIG.

FIG. 4 is a sectional view taken along line S1-S2 in FIG. 1;

FIG. 5 is an enlarged view of a main part of FIG. 1;

FIG. 6 is a cross-sectional view of a conventional portable MD player with a lid opened and a lid closed.

FIG. 7 is a perspective view of an assembled chassis of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chassis of 1st Example 6 Leaf spring 6a Writing wall 7 Buffer rubber 8 Base 9 Pickup unit 10 Optical disk 11 Optical component 12 Feed shaft

Claims (3)

[Claims] 1. A base holding a pickup unit for accessing an optical disk is engaged with a main shaft and a sub shaft arranged in parallel with each other on a chassis, and the main shaft comprising a screw shaft is driven to drive the main shaft. An optical disc device for moving in the radial direction, comprising: a buffer at an end of the main shaft, which abuts against a side wall of the base in a state where the base is moved to an end of the main shaft to cushion a collision; A resin leaf spring is provided at the end of the base, the tip being in contact with the side wall of the base in a state where the base has moved to the end of the main shaft, and cushioning a collision. While buffering the impact level when the main body receives an impact, the base end of the leaf spring contacts the side wall of the base in a state where the distal end of the leaf spring is elastically deformed more than specified. A regulation that regulates the elastic deformation of the leaf spring tip. An optical disk device with a control wall. 2. The optical disk device according to claim 1, wherein said leaf spring is formed by outsert molding on a chassis. 3. The optical disk apparatus according to claim 1, wherein a contact position between said leaf spring and a side wall of said base is located on a line passing through a center of gravity of a moving body comprising said pickup unit and said base. .