JPH0527862U - Guide mechanism for pick-up carriage - Google Patents

Abstract

(57) [Abstract] [Purpose] A spring plate may not be used to elastically displace the guide rod in order to support and guide the pickup carriage along the guide rod without play. (EN) Provided is a guide mechanism for a pickup carriage, which can be easily and well-balanced and made with appropriate elasticity and can reduce the number of kinds of parts. [Structure] One of two parallel guide rods is formed on both end sides so that an intermediate guide portion is elastically bendable when pushed by a guide roller of a carriage, and an end side of the flexible portion is formed. A guide mechanism for a pickup carriage that is elastically displaceable by fixing the.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a guide mechanism for a carriage that carries and moves a recording / reproducing head, that is, a pickup head of an optical disk device for reading and writing recorded information such as a CD and a magneto-optical disk.

[0002]

[Prior Art]

 The partial plan view of FIG. 5 and the partial side view of FIG. 6 show an example of an optical disc device for recording and reproducing information on a magneto-optical disc. In these figures, 1 is a device frame and 2 is a device frame 1. This is a cartridge holder in which the magneto-optical disk cartridge 3 inserted therein and inserted in the direction of the white arrow is set. The disc in the magneto-optical disc cartridge 3 set in the cartridge holder 2 is rotationally driven by the driving means 4 which is detachably provided in the magneto-optical disc cartridge 3.

Reference numeral 5 denotes a laser light incident means, which is a semiconductor laser 5 a, a collimator lens (not shown), a prism, a beam splitter, and an objective lens 5 b and drives them to form a laser light collecting spot on a track of a magneto-optical disk. It is composed of a pickup head and the like including an actuator 5c for following.

Reference numeral 6 denotes a reflected light detecting means for detecting reflected light from the magneto-optical disk, which includes an objective lens, an actuator, a beam splitter, a beam splitter of a detection optical path (not shown), and a condenser lens common to the laser light incident means 5. , An analyzer and a light detecting element 6a.

A carriage 7 is provided with a laser light incident means 5 and a reflected light detection means 6, and moves a pickup head to a track position so that reading / writing of a magneto-optical disk can be performed. The carriage 7 is supported and guided by two parallel guide rods 8 and 9 attached to the device frame 1. Numeral 10 is a magnetic field generating means for causing a bias magnetic field to act on the magneto-optical disk when laser light is incident to read / write the magneto-optical disk.

Reference numeral 11 denotes a pair of drive coils 11 a provided on both sides of the carriage 7, and a pair of magnetic circuits provided on the device frame 1 so as to intersect the drive coils 11 a and follow the guide rods 8 and 9. It is a carriage moving means of a moving coil type linear motor which is combined with 11b.

The partial perspective view of FIG. 7 and the partial front view of FIG. 8 show the support guide mechanism of the carriage 7. The main body of the carriage 7 is composed of an upper body 7a and a lower body 7b attached to the lower portion of the upper body 7a on the guide rod 8 side.

The upper body 7a has two sets of guide rollers 12, 13 and 14, 15 (guide rollers 15) which come into contact with the inner surface obliquely from above and from below at two positions distant from each other in the longitudinal direction of the guide rod 9. Is provided and is not visible. Further, the guide roller 1 is in contact with the inner side surface of the guide rod 8 from obliquely above at a position corresponding to the center between the above two positions.
6 are provided. Further, the lower body 7b is provided with a guide roller 17 on the inner surface of the guide rod 8 that abuts from an obliquely lower side so as to form a set with the guide roller 16.

The lower body 7b is attached to the upper body 7a on the side opposite to the guide rod 8 side of the lower body 7b as shown in the partial side view of FIG. 9 and the partial sectional view of FIG. A fulcrum 18 of a steel ball or a round bar is interposed between the facing surface and the facing surface of the upper body 7a so that the lower body 7b can be rotated about the fulcrum 18 with respect to the upper body 7a to some extent. Between the upper body 7a and the upper body 7a, there is provided a biasing engagement means 19 composed of a spring and a rod for transmitting the force for pulling the free end side of the lower body 7b toward the upper body 7a side (the arrow direction in FIG. 10). Is being done.

As a result, the guide roller 17 of the lower body 7 b pushes the guide rod 8, and the guide roller 16 of the upper body 7 a pushes the guide rod 8 with the reaction force thereof. The two guide rollers 12, 13 and 14, 15 of the body 7a push the guide rod 9, so that the carriage 7 is supported by the guide rods 8 and 9 without rattling.

However, the carriage supporting and guiding mechanism shown in FIGS. 7 to 10 requires the carriage body to be divided into two parts and the engagement so as to be biased and restrained so that the carriage body can be appropriately separated. However, there is a problem that the device tends to increase in size. Therefore, as a mechanism for solving this problem and for supporting and guiding the carriage without play, there is a mechanism shown in the partial plan view of FIG. 11 and the partial front view of FIG. 12 or the partial front view of FIG.

The support guide mechanism of FIGS. 11 and 12 is different from that of FIGS. 7 to 10 in that the main body of the carriage 7 is integrated, and therefore the guide roller 17 is also attached to the carriage 7 like the guide rollers 12 to 15 and 16. A spring plate 21 is provided on a fixed shaft, and the guide rod 8 is attached to the receiving seat 20 at both end sides. In the illustrated state in which the guide rods 8 and 9 support and guide the carriage 7, The point is that the rod 8 is pushed by the guide rollers 16 and 17 and is elastically displaced away from the vertical receiving surface 20a of the receiving seat 20. The support guide mechanism of FIG. 13 differs from the support guide mechanism of FIGS. 11 and 12 only in that the spring plate 21 attached to the receiving seat 20 of the guide rod 8 is attached to the vertical surface of the receiving seat 20.

These carriage support guide mechanisms have a simpler structure of the carriage as compared with the support guide mechanisms of FIGS. 7 to 10, but the receiving seat 22 of the guide rod 9 and the stopper plate 23 of the guide rod 8 are the same. Different from the seat 20 and the spring plate 21, there are many kinds of parts, and it is quite troublesome to balance the urging force of the spring plate 21 at both ends of the guide rod 8 or to make them have appropriate strength. ..

[0014]

[Problems to be solved by the device]

 The present invention has been made to solve the problem of the carriage support mechanism that allows the guide rod to be elastically displaced as described above, and requires a spring plate to elastically displace the guide rod. It is an object of the present invention to provide a guide mechanism for a pick-up carriage, in which the elastic displacement of the guide rod can be easily performed with good balance and appropriate elasticity, and the number of types of parts can be reduced.

[0015]

[Means for Solving the Problems]

 According to the present invention, two parallel guide rods are attached to a fixed frame of an optical disk device, press-contacted to a pickup carriage at two positions apart from one of the guide rods in the length direction, and the other one. A book is attached by pressing at one position in the middle of the above two positions or at two similar positions, and attaching a plurality of guide rollers for applying a force to the two guide rods in the direction of expanding or narrowing their parallel width. In the guide mechanism of the pickup carriage, one of the two guide rods has an extension portion at both ends which can be elastically bent by the force, and the tip of the extension portion is supported by the fixed frame. The guide mechanism of the pickup carriage is characterized in that it can be elastically displaced in a direction in which the parallel width is expanded or narrowed. To achieve.

[0016]

[Action]

 That is, in the guide mechanism of the carriage of the present invention, one of the two parallel guide rods can elastically displace the intermediate guide portion by the flexible portions at both ends, so that elastic displacement is possible. There is no need for a spring plate to do so, the two guide rods can be attached in the same way, and the balance of elastic displacement and elastic force can be easily made appropriate and the number of types of parts can be reduced. ..

[0017]

【Example】

 Hereinafter, the present invention will be described with reference to the embodiments shown in FIGS.

1 and 2 are a plan view and a front view showing a guide rod and its attachment mechanism portion, and FIGS. 3 and 4 are perspective views showing another example of the guide rod which is elastically displaced.

The carriage support guide mechanism shown in FIGS. 1 and 2 is a carriage in which two sets of the carriage 7 or the guide rollers shown in FIGS. 11 and 12 are symmetrically provided on both left and right sides, that is, parallel guides. It supports and guides a carriage having guide rollers that press against the inner surfaces of the rods 81 and 91. Both ends of the parallel guide rods 81 and 91 are fixed by a common receiving seat 24 and a stopper plate 25. However, the guide rod 81 is formed on the flexible portion 81b having a cross-sectional shape that is easily elastically bent and deformed in the direction in which both outer sides of the intermediate guide portion 81a are pushed by the guide rollers. Since both end portions are fixed by the receiving seat 24 and the stopper plate 25, when the guide portion 81a is pushed by the guide roller, it is elastically displaced as shown by the chain double-dashed line in FIG.

Therefore, the carriage can be supported without play and guided along the guide rod 91 accurately and lightly.

The guide mechanism of the carriage of the present invention is not limited to the examples of FIGS.
1 may be as shown in FIGS. 3 and 4, or the guide rollers provided on the carriage may be in pressure contact with the outer surfaces of two parallel guide rods. The fixing means at both ends of the guide rods 81 and 91 is not limited to the same.

[0022]

[Effect of the device]

 In the guide mechanism of the carriage of the present invention, it is not necessary to use a spring plate to elastically displace one of the two parallel guide rods, and the number of types of parts can be reduced. The excellent effect that the balance of elastic displacement and elastic force can be easily adjusted to an appropriate value can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a guide rod of a guide mechanism of the present invention and its mounting mechanism.

FIG. 2 is a front view of a guide rod of the guide mechanism of the present invention and its mounting mechanism.

FIG. 3 is a perspective view of a guide rod used in the guide mechanism of the present invention.

FIG. 4 is a perspective view of a guide rod used in the guide mechanism of the present invention.

FIG. 5 is a partial plan view of a disk device to which the present invention is applied.

FIG. 6 is a partial side view of a disk device to which the present invention is applied.

FIG. 7 is a partial perspective view showing an example of a conventional carriage support guide mechanism.

FIG. 8 is a partial front view of a conventional carriage support guide mechanism.

FIG. 9 is a partial side view of a conventional carriage support guide mechanism.

10 is a partial cross-sectional view taken along the line AA of FIG.

FIG. 11 is a partial plan view showing another example of a conventional carriage support guide mechanism.

FIG. 12 is a partial front view of a conventional carriage support guide mechanism.

FIG. 13 is a partial front view of a conventional carriage support guide mechanism in which a carriage is omitted.

[Explanation of symbols]

 5b Objective lens 7 Carriage 8, 9, 81, 91 Guide rod 81a Guide part 81b Flexible part 11a Drive coil 12, 13, 14, 15, 16, 17 Guide roller 20, 22, 24 Receiving seat 21 Spring plate 23, 25 Clasp

Claims (1)

[Scope of utility model registration request] 1. A pair of parallel guide rods are attached to a fixed frame of an optical disk device, and are pressed into contact with a pickup carriage at two positions apart from one of the guide rods in the length direction thereof, and the other one. A book is a pickup in which a plurality of guide rollers are attached by pressing at one intermediate position between the two positions or at two similar positions and applying a force to the two guide rods in the direction of expanding or narrowing their parallel width. In the guide mechanism of the carriage, one of the two guide rods has an extension portion at both ends that can be elastically bent by the force, and the tip end of the extension portion is supported by the fixed frame. A guide mechanism for a pickup carriage, wherein the guide mechanism can be elastically displaced in a direction of expanding or narrowing the parallel width.