JP3048545U - Slide feeder - Google Patents

Abstract

(57) [PROBLEMS] To reverse a lead screw even when the tooth rides on the outer peripheral surface of a lead screw, and to return the tooth into the spiral groove of the lead screw. SOLUTION: A tooth portion 6c provided at a distal end portion of an elastically deformable synthetic resin arm 6b extending laterally from a movable body 2 of the optical pickup for a disc player is fitted into a spiral groove 5a of a lead screw 5. In a slide feeder in which the movable body 2 is slid via the teeth 6c and the arm 6b by rotating the lead screw 5 in the forward and reverse directions, the lead screw 5 is formed of a magnetic material, and the distal end 17 of the arm 6b is formed. A magnet 20 is attached to the helical groove 5 by magnetic attraction acting between the magnet 20 and the lead screw 5.
a.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 SUMMARY OF THE INVENTION The present invention relates to a disk player optical pickup for reproducing, recording, or erasing information stored on an optical disk or a magneto-optical disk (hereinafter referred to as a disk), which is abbreviated as a CD, for example. The present invention relates to a slide feed device for performing a slide feed along a direction.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there are techniques disclosed in Japanese Patent Application Laid-Open No. 62-36786 and Japanese Utility Model Application Laid-Open No. 4-58858 as a slide feed device for a disc player. One example of the technology will be described with reference to FIGS. A lead screw 5 which is inserted into a pair of front and rear cylindrical portions 2a and 2b provided at one end of the movable body 2 and both ends of which are rotatably supported by bearings 4 on a support frame 3; And a synthetic resin interlocking connection member 6 for interlocking and connecting the movable body 2 to the movable body 2. The interlocking connection member 6 is elastically deformable and extends from the fixed block 6 a on the movable body 2 toward the lead screw 5. An arm 6b, and a tooth 6c provided at the tip of the arm 6b and fitted in the spiral groove 5a of the lead screw 5. The fixed block 6a is mounted on the fixed block 6a. By pressing the distal end of a leaf spring 8 fixed to the movable body 2 integrally with a fastener 7 such as a bolt against the distal end of the arm 6b, the floating of the tooth 6c is prevented, and the The portion 6c is fitted in the spiral groove 5a. In FIG. 6, reference numeral 9 denotes a guide rail for movably supporting the other end of the movable body 2, reference numeral 10 denotes a turntable rotated by a spindle motor 11, and reference numeral 12 denotes that the movable body 2 has reached the front end. The detector 13 is an objective lens provided on the movable body 2.

In the above configuration, the disk D is placed on the turntable 10, the turntable 10 is rotated at a high speed by the spindle motor 11, and the lead screw 5 is rotated in the normal and reverse directions so that the teeth 6 c and the arms 6 b are rotated. The movable body 2 is slid forward and backward along the radial direction a, b of the disk through the optical disk, thereby reproducing, recording or erasing information stored on the disk D through the objective lens 13 provided on the movable body 2. It can be performed.

[0004]

[Problems to be solved by the invention]

 In the above-mentioned conventional configuration, as shown in FIGS. 9 and 10, when the movable body 2 is slid forward to the front end or the rear end and stopped, the teeth 6 c of the lead screw 5 are rotated by the rotation of the lead screw 5. In this case, the leaf spring 8 is largely elastically deformed and the tooth portion 6c is strongly pressed against the outer peripheral surface of the lead screw 5, so that the rotational load of the lead screw 5 increases and In some cases, the lead screw 5 cannot be reversed, and the tooth 6c cannot be returned into the spiral groove 5a.

In view of the above problems, the present invention can reverse the lead screw and return the tooth portion into the spiral groove of the lead screw even when the tooth portion rides on the outer peripheral surface of the lead screw. It is intended to provide a slide feeder.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a tooth portion provided at a tip portion of an elastically deformable synthetic resin arm extending laterally from a transferred object is fitted into a spiral groove of a lead screw. In a slide feeder configured to slide and convey an object to be conveyed through the teeth and the arm by rotating the lead screw forward and reverse, the lead screw is formed of a magnetic material, and the arm is provided on the arm. A magnet is attached, and the teeth are pressed toward the inside of the spiral groove by magnetic attraction acting between the magnet and the lead screw.

In the above configuration, for example, a movable body (transported object) of an optical pickup for a disc player will be described. For example, a disc is placed on a turntable, and the turntable is rotated at a high speed by a spindle motor. By rotating the lead screw forward and backward and sliding the movable body back and forth along the radial direction of the disk through the teeth and the arm, the movable body is stored on the disk through the objective lens provided on the movable body. Information can be reproduced, recorded or erased.

In this case, the teeth are pressed into the spiral groove by the magnetic attraction acting between the magnet attached to the arm and the lead screw to prevent the teeth from floating. The rotational force of the lead screw is reliably transmitted to the arm and the movable body via the spiral groove and the tooth portion, and the movable body can be smoothly slid.

Further, when the movable member is slid to the front end or the rear end and stopped, and the tooth portion rides on the outer peripheral surface of the lead screw by rotation of the lead screw, the magnet is driven by the magnet. Since the rotational load of the lead screw is not reduced due to the magnetic attraction force being reduced apart from the screw, or at least the rotational load is not increased, the lead screw is reversely rotated so as to be inserted into the spiral groove. The teeth can be easily returned.

According to a second aspect of the present invention, in the first aspect, the arm has a base end extending from the fixed block fixed to the object to be transported toward the lead screw, and a substantially right angle from the base end. A central portion that bends at a right angle, and a distal portion that is bent from the central portion in a direction opposite to the base end at substantially a right angle. The teeth are integrally formed on the inner surface of the distal end, and It is characterized in that the magnet is attached to the outer surface.

According to the above configuration, since the magnet and the lead screw are opposed to each other with the tooth portion interposed therebetween, the tooth portion is directly pressed by magnetic attraction generated between the magnet and the lead screw, and the tooth is pressed. The part can be reliably prevented from floating.

According to a third aspect of the present invention, in the first aspect, the arm has a base end extending from the fixed block fixed to the object to be transported toward the lead screw, and a substantially right angle from the base end. A central portion that bends at a right angle, and a distal portion that is bent from the central portion in a direction opposite to the base end at substantially a right angle.The teeth are integrally formed on the inner surface of the distal end, and the central portion is formed at the central portion. It is characterized in that the magnet is attached.

[0013] According to the above configuration, the central portion of the arm is pressed toward the lead screw by the magnetic attraction force, so that the tooth portion can be prevented from being separated from the spiral groove.

According to a fourth aspect of the present invention, in the device according to any one of the first to third aspects, a plurality of projections are provided at the magnet mounting position of the arm, and the plurality of projections are provided between the plurality of projections. It is characterized in that the magnet is detachably fitted.

According to the above configuration, the magnet can be easily attached to the arm only by fitting the magnet between the plurality of protrusions.

According to a fifth aspect of the present invention, in the device according to any one of the first to fourth aspects, the transferred object is a movable body of an optical pickup for a disc player.

According to the above configuration, the movable body of the optical pickup for a disc player can be reliably slid and fed along the radial direction of the disc.

[0018]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a disk player provided with a slide feeder according to an embodiment of the present invention, in which a lead screw 5 is made of a magnetic material such as stainless steel and an interlocking connecting member 6 made of synthetic resin. An elastically deformable arm 6b has a base end 15 extending from the fixed block 6a fixed to the movable body 2 with the fastener 7 toward the lead screw 5, and a central portion 16 bent substantially at right angles from the base end 15. And a distal end portion 17 which is bent from the central portion 16 at a substantially right angle in a direction opposite to the proximal end portion 15, and between the proximal end portion 15 and the central portion 16 and between the central portion 16 and the distal end portion 17. The bent portion between them is a hinge portion 18. Further, the teeth 6c are integrally formed on the inner surface of the tip portion 17, and a plurality of projections 19 are provided on the outer peripheral edge of the tip portion 17, and a magnet 20 is provided between the plurality of projections 19. Mated. Since the configuration other than the above is almost the same as the conventional example shown in FIGS. 6 to 10, the same portions are denoted by the same reference numerals and description thereof will be omitted.

In the above configuration, simply pushing the magnet 20 between the plurality of projections 19 causes the magnet 20 to push the upper inner inclined surface 19 a of each projection 19 outward and fit between the projections 19, The concave step portion 19b which is continuous with the lower end of the inclined surface 19a is engaged with the magnet 20, so that the magnet 20 can be detachably and securely attached to the distal end portion 17 of the arm 6b.

When reproducing, recording, or erasing the information stored in the disk D, the disk D is placed on the turntable 10 in substantially the same procedure as in the above-described conventional example, and the turntable 10 Is rotated by the spindle motor 11 at high speed, and the lead screw 5 is rotated forward and reverse to slide the movable body 2 forward and backward along the disk radial directions a and b via the teeth 6c and the arms 6b. .

In this case, the magnet 20 and the lead screw 5 are opposed to each other with the tooth portion 6c interposed therebetween, and the tooth portion 6c is directly pressed by the magnetic attraction generated between the two, and the tooth Since the portion 6c is prevented from floating, the rotational force of the lead screw 5 is reliably transmitted to the arm 6b and the movable body 2 via the spiral groove 5a and the tooth portion 6c, and the movable body 2 is smoothly moved. The slide can be fed.

As shown in FIGS. 4 and 5, when the movable body 2 is slid to the front end or the rear end and stopped, the teeth 6 c of the lead screw 5 are rotated by the rotation of the lead screw 5. When the magnet rides on the outer peripheral surface, the magnet 20 is separated from the lead screw 5 and its magnetic attraction is reduced to reduce the rotational load of the lead screw. The tooth portion 6c can be easily returned into the groove 5a.

In the above-described embodiment, the magnet 20 is attached to the outer surface of the distal end portion 17 of the arm 6b. However, the present invention is not limited to this. For example, as shown by a virtual line in FIG. The magnet 20 may be attached to the outer surface of the part 16. Thereby, the central portion 16 of the arm 6b is pressed toward the lead screw 5 by the magnetic attraction force, so that the tooth portion 6c is not separated from the spiral groove 5a, and the tooth portion 6c is connected to the lead screw 5. When the vehicle rides on the outer peripheral surface of the magnet 5, the magnetic attraction force acting between the magnet 20 and the lead screw 5 does not increase. 6c can be easily returned.

Also, the disc player has been described as an example, but the present invention can also be applied to various electronic devices that require a slide feed.

[0025]

[Effect of the invention]

 According to the first aspect of the present invention, the teeth are pressed toward the inside of the spiral groove by the magnetic attraction acting between the magnet attached to the arm and the lead screw to prevent the teeth from floating. Therefore, the rotational force of the lead screw can be reliably transmitted to the arm and the movable body via the spiral groove and the tooth portion, and the movable body can be smoothly slid.

When the movable member is slid to the front end or the rear end and stopped, and the tooth portion rides on the outer peripheral surface of the lead screw by rotation of the lead screw, the magnet is driven by the lead. Since the rotational load of the lead screw is not reduced due to the magnetic attraction force being reduced apart from the screw, or at least the rotational load is not increased, the lead screw is reversely rotated so as to be inserted into the spiral groove. The teeth can be easily returned.

According to the invention of claim 2, since the magnet and the lead screw are opposed to each other with the teeth interposed therebetween, the magnets are directly pressed by the magnetic attraction generated between them. As a result, it is possible to reliably prevent the teeth from floating.

According to the third aspect of the present invention, the central portion of the arm is pressed toward the lead screw by the magnetic attraction force, so that the tooth portion can be prevented from being separated from the spiral groove.

According to the present invention, the magnet can be easily attached to the arm only by fitting the magnet between the plurality of protrusions.

According to the invention of claim 5, the movable body of the optical pickup for a disc player can be reliably slid and fed along the radial direction of the disc.

[Brief description of the drawings]

FIG. 1 is a plan view of a disc player provided with a slide feeding device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the main part.

FIG. 3 is a longitudinal sectional view of the main part.

FIG. 4 is a cross-sectional view of a main part showing a state in which the tooth portion rides on the outer peripheral surface of the lead screw.

FIG. 5 is a longitudinal sectional view of a main part in the same state.

FIG. 6 is a plan view of a disc player provided with a conventional slide feeder.

FIG. 7 is a cross-sectional view of the main part.

FIG. 8 is a longitudinal sectional view of the main part.

FIG. 9 is a cross-sectional view of a main part showing a state in which the tooth portion rides on the outer peripheral surface of the lead screw.

FIG. 10 is a longitudinal sectional view of a main part in the same state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 optical pickup 2 movable body of optical pickup (transported object) 5 lead screw 5 a spiral groove 6 a fixed block 6 b arm 6 c tooth 15 base end of arm 16 central part of arm 17 distal end of arm 19 protrusion 20 magnet

Claims (5)

[Utility model registration claims] An elastically deformable synthetic resin arm extending laterally from an object to be transferred is provided with a tooth portion provided at a distal end portion thereof, which is fitted into a spiral groove of a lead screw, and the lead screw is rotated forward and reverse. In a slide feeding device configured to slide and convey an object to be conveyed through the teeth and the arm, the lead screw is formed of a magnetic material, and a magnet is attached to the arm,
A slide feeder, wherein the tooth portion is pressed into the spiral groove by a magnetic attraction force acting between the magnet and the lead screw. 2. A base end portion of the arm extending from a fixed block fixed to a conveyed object toward a lead screw, a central portion bent substantially at right angles from the base end portion, and the base end portion extending from the central portion. And a tip that bends at a substantially right angle in the opposite direction, wherein the teeth are integrally formed on the inner surface of the tip, and the magnet is attached to the outer surface of the tip. The slide feeder according to claim 1. 3. A base end portion of the arm extending from the fixed block fixed to the object to be conveyed toward the lead screw, a center portion bent substantially at right angles from the base end portion, and the base end portion extending from the center portion. A tip portion bent at a substantially right angle in the opposite direction to the tip portion, wherein the tooth portion is integrally formed on an inner surface of the tip portion, and the magnet is attached to the central portion. The slide feeder according to 1. 4. The arm according to claim 1, wherein a plurality of protrusions are protruded at a position where the arm is attached to the magnet, and the magnet is removably fitted between the plurality of protrusions. The slide feeder according to any one of the above. 5. The apparatus according to claim 1, wherein the transferred object is a movable body of an optical pickup for a disc player.
5. The slide feeder according to any one of items 1 to 4.