JP4591706B2 - Disk unit - Google Patents

Description

The present invention relates to a disk device such as a DVD player or a DVD recorder, and in particular,
The worm bearing is fast and easily fixed to the traverse chassis with an inexpensive structure.

An example of the disk device technology is shown in FIGS. This is a DVD player, in which a loader chassis 3 that supports a tray 2 so as to be able to move forward and backward a and b is provided in a housing 1 having a disk insertion slot 1a on the front surface, and a metal plate disposed in the loader chassis 3 The rear part of the made traverse chassis 4 is pivotally supported by the loader chassis 3 via a pivot shaft 5 so as to be able to move up and down c and d, and a spindle motor 7 with a turntable 6 for mounting a disk D is placed on the front part of the traverse chassis 4. Is mounted, and the optical pickup 8 with the objective lens OL is disposed in the central opening 4a of the traverse chassis 4, and the engaging portion 8a formed on one side of the optical pickup 8 is arranged on one side of the central opening 4a. The guide hole 8b formed on the other side of the optical pickup 8 is installed along the other side edge of the central opening 4a while being engaged with the guide rail 9 provided on the edge. By engaging the guide shaft 10, the optical pickup 8 is formed so as to be reciprocated along the radial direction of the disc D.

As shown in FIG. 7, the optical pickup 8 includes a rack and pinion mechanism 12 and a warm mechanism 1.
3 is linked to the feed motor 14 via the feed motor 14 and the gear mechanism 1
A driven pinion 16 that rotates forward and backward through e and f via 5 is disposed at the front portion of the loader chassis 3.

A cam slider 18 integrally formed with a slide rack 18a removably engaged with the driven pinion 16 is provided at the front part of the loader chassis 3 in the left-right direction g,
A cam pin 19 is slidably disposed along the cam groove 18b of the cam slider 18 and is integrally projected on the front surface of the traverse chassis 4. A trigger plate 21 is integrally formed on the cam slider 18, and the rack and pinion An operation groove 23 that is inclined obliquely is formed on the lower surface of the trigger plate 21 so as to face the operation pin 22 protruding from the front end of the rack of the mechanism 12. In FIG. 8, reference numeral 25 denotes a clamper which is disposed in a central storage portion 26 a of a cross rail 26 laid between both side plates of the loader chassis 3 so as to be able to move up and down within a certain range. Thus, the disk D is connected between the clamper 25 and the turntable 6.
Clamp.

Referring to the information reading operation, the solid line in FIG. 8 indicates the play mode, and the disk D is rotated at high speed via the turntable 6 by the spindle motor 7 with the disk D clamped by the turntable 6 and the clamper 25. Drive the feed motor 14 to
The optical pickup 8 is moved forward and backward a and b through the optical mechanism 13 and the rack and pinion mechanism 12, and laser light is projected from the optical pickup 8 onto the disk D, and recorded on the disk D based on the reflected light. Play video information.

In the above configuration, when the tray is opened, the optical pickup 8 is moved forward a, so that the operation pin 22 enters the operation groove 23 and pushes the inclined inner surface of the operation groove 23, so that the cam slider 18 moves in the direction of arrow g. The slide rack 18 a is slightly slid and meshes with the driven pinion 16. By rotating the driven pinion 16 forward in this meshing state, the cam slider 18 is slid in the direction of the arrow g, and the traverse chassis 4 is moved downward d through the cam groove 18b and the cam pin 19, whereby the disk D is turned on the turntable. 6 is transferred to the tray 2 (see the phantom line in FIG. 8). Subsequently, the slide rack 18a is separated from the driven pinion 16, and at substantially the same time, a rack (not shown) on the lower surface of the tray 2 is engaged with the large-diameter pinion 16a integrally formed with the driven pinion 16, and the large-diameter pinion 16a. The tray 2 is moved forward by a forward rotation e (see the phantom line in FIG. 8). The disk D is taken out from the open tray 2 or a new disk D is placed on the tray 2.

  At the time of tray-in, the reverse operation is performed.

As shown in FIG. 9, the worm mechanism 13 includes a worm wheel 13A linked to the optical pickup 8 via a rack and pinion mechanism 12, and a worm wheel connected to the rotation shaft of the feed motor 14. There is provided a worm gear 13B meshed with 13A, and a synthetic resin worm bearing 28 is provided to support the worm gear 13B so as not to be separated from the worm wheel 13A.

Conventionally, as shown in FIGS. 10 to 12, the worm bearing 28 includes a bearing body 28A having a bottom plate 28a and a side plate 28b integrally joined to each other at right angles, and a side plate 28 of the bearing body 28A.
b is formed of a substantially L-shaped arm 28B which is formed integrally with one side edge and extends laterally in parallel with the side plate 28b, and is substantially perpendicular to the side edge of the central opening 4a of the traverse chassis 4. A pair of left and right substantially L-shaped hooking pieces 2 on both side edges of the side plate 28b facing the bent edge piece 29.
8c is integrally formed, a tip bearing portion 28d for supporting the free end of the worm gear 13B is integrally formed at the tip of the arm 28B, and a pair of reinforcing plates 28e is provided between the bottom plate 28a and the side plates 28b.
Are integrally formed and a pair of positioning pins 28f are integrally projected on the lower surface of the bottom plate 28a so as to face the pair of positioning holes 30 penetrating the traverse chassis 4, and the base end of the arm 28B and the other side edge of the side plate 28b. A reinforcing frame 28g is formed integrally therewith, and a screw insertion hole 33 is inserted through the bottom plate 28a so as to face the screw hole 31 formed in the traverse chassis 4.

The fixing procedure of the worm bearing 28 will be described. The side plate 28b of the bearing main body 28A is attached to the edge piece 2
9, the hooking piece 28 c is hooked on the edge piece 29, and the positioning pin 28 f is fitted into the positioning hole 30, thereby positioning the bearing body 28 A at a predetermined position on the traverse chassis 4, By screwing a screw 32 into the screw hole 31 from the insertion hole 33, the bottom plate 28a is fixed to the traverse chassis 4, and the tip bearing portion 2 of the arm 28B is fixed.
8d is applied to the free end of the worm gear 13B. In addition, there exists what was described in patent document 1 as a technique relevant to this invention.
JP-A-2005-42793

In the above conventional configuration, the screw 32 is used to fix the worm bearing 28 to the traverse chassis 4, and the number of parts increases by the amount of the screw 32 used, and the screw hole 31 is formed in the traverse chassis 4. The cost is increased. Also,
The screwing operation of the screw 32 takes time and is troublesome.

An object of the present invention is to provide a disk device that can quickly and easily fix a worm bearing to a traverse chassis with an inexpensive structure.

In order to achieve the above object, according to the first aspect of the present invention, an optical pickup is disposed in a central opening of a traverse chassis on which a disk mounting turntable is mounted so as to be reciprocally movable along a radial direction of the disk. A feed motor for reciprocating the optical pickup via the rack and pinion mechanism and the worm mechanism is disposed on the traverse chassis, and is made of a synthetic resin that supports the free end of the worm gear that meshes with the worm wheel of the worm mechanism. The worm bearing comprises a bearing body having a bottom plate and a side plate integrally joined to each other at right angles, and an approximately L-shaped arm that is elastically displaceable extending laterally from the side plate of the bearing body, and a side edge of the central opening. A pair of hook pieces integrally formed on both side edges of the side plate are hooked on edge pieces bent at a substantially right angle from the side plate, and the bottom plate is trapped with screws. By fixing it to the chassis, the end bearing part of the arm is applied to the free end of the worm gear, the disk is rotated at a high speed by a turntable, and the worm mechanism and the rack and pinion mechanism are operated by a feed motor. Reciprocating the optical pickup, projecting laser light from the optical pickup toward the disk,
In the disk device that reads information recorded on the disk based on the reflected light, the screw is omitted, and a rising piece having a width that is the same as or slightly smaller than the interval between the two hooking pieces is integrated with the edge piece. A hook is integrally formed at the tip of an elastically displaceable elastic piece left by cutting and forming a pair of slits parallel to both hooking pieces at a predetermined interval in the center of the side plate. A hook hole is formed in the edge piece so as to face the hook, and both hooking pieces are engaged with both side edges of the rising piece, the hooking pieces are hooked on the edge piece, and the hook is hooked into the hook hole. By inserting, the bearing body is fixed on the traverse chassis, the reinforcing projection is integrally projected at the base end of the arm, and the bottom plate is opposed to the screw hole of the traverse chassis. It is characterized in that the insertion portion is formed.

According to a second aspect of the present invention, an optical pickup is disposed in a central opening of a traverse chassis on which a disk mounting turntable is mounted so as to be able to reciprocate along the radial direction of the disk, and the optical pickup is mounted on a rack and pinion mechanism. And a feed motor for reciprocating through the worm mechanism is disposed on the traverse chassis, and the synthetic resin worm bearings supporting the free end of the worm gear meshing with the worm wheel of the worm mechanism are perpendicular to each other. An edge formed of a bearing body having a bottom plate and a side plate integrally joined, and a substantially L-shaped arm that is elastically displaceable extending laterally from the side plate of the bearing body, and is bent at a substantially right angle from a side edge of the central opening. Hook a pair of hook pieces integrally formed on both side edges of the side plate on the piece, and fix the bottom plate to the traverse chassis. The end bearing portion of the arm is abutted against the free end of the worm gear, the disk is rotated at a high speed by a turntable, and the optical pickup is reciprocated by a feed motor via a worm mechanism and a rack and pinion mechanism. In a disk apparatus that is moved, projects laser light from the optical pickup toward the disk, and reads information recorded on the disk based on the reflected light, the distance between the two hook pieces is the same or slightly A tip of an elastically displaceable elastic piece left by cutting a small horizontal rising piece integrally formed on the edge piece and forming a pair of slits parallel to both hook pieces at a predetermined interval in the center of the side plate A hook hole is formed in the edge piece so as to face the hook, and both side edges of the rising piece are formed Is engaged with both the catching piece, hook the both said catching piece in the edge piece, and, by fitting the hook into the hook hole, is characterized in that the bearing body is fixed on the traverse chassis.

According to a third aspect of the present invention, in the second aspect of the present invention, a reinforcing projection is integrally provided at the base end of the arm.

A fourth aspect of the invention is characterized in that, in the invention of the second or third aspect, a screw insertion portion is formed on the bottom plate so as to face the screw hole of the traverse chassis.

The invention according to claim 1 corresponds to an embodiment (see FIGS. 1 to 6), and according to this, when the worm bearing is fixed to the traverse chassis, the edge piece is integrally projected. Engage the two hooking pieces of the bearing body with both side edges of the rising piece provided, hook the hooking pieces on the edge piece, and elastically displace the elastic piece of the bearing main body to be integrated with the tip of the elastic piece It is only necessary to fit the formed hook into the hook hole of the edge piece, and the fixing operation can be performed quickly and easily.

Also, by engaging both hooking pieces with both side edges of the rising piece, it opposes the load in the forward / backward direction along the longitudinal direction of the edge piece, and is perpendicular to the forward / backward direction by hooking both hooking pieces on the edge piece. It resists the load in the left and right direction, and by fitting the hook into the hook hole, it counters the forward and backward movement and the load in the up and down direction perpendicular to the left and right direction. A screw for screwing is not required, and a screw hole for screwing the screw is not required. Therefore, an inexpensive structure can be obtained.

Further, since the base end portion of the arm is reinforced by the reinforcing protrusion, the arm is relatively strongly elastically displaced, and the tip bearing portion of the arm is securely pressed against the free end of the worm gear. The gear can be supported so as not to be separated from the worm wheel.

Moreover, by screwing the screw into the screw hole of the traverse chassis through the screw insertion portion formed on the bottom plate of the bearing main body, the bearing main body can be fixed to the traverse chassis with screws as in the past.

The invention according to claim 2 corresponds to the basic form. According to this, when the worm bearing is fixed to the traverse chassis, the bearing body is provided on both side edges of the rising piece integrally projecting from the edge piece. The hooks that are integrally formed at the tip of the elastic piece are hooked to the edge hole of the edge piece by engaging both the hook pieces and hooking the hook pieces to the edge piece and elastically displacing the elastic piece of the bearing body. It only needs to be inserted, and the fixing operation can be performed quickly and easily.

Also, by engaging both hooking pieces with both side edges of the rising piece, it opposes the load in the forward / backward direction along the longitudinal direction of the edge piece, and is perpendicular to the forward / backward direction by hooking both hooking pieces on the edge piece. It resists the load in the left and right direction, and by fitting the hook into the hook hole, it counters the forward and backward movement and the load in the up and down direction perpendicular to the left and right direction. A screw for screwing is not required, and a screw hole for screwing the screw is not required. Therefore, an inexpensive structure can be obtained.

According to the third aspect of the invention, since the base end portion of the arm is reinforced by the reinforcing protrusion, the arm is relatively strongly elastically displaced, and the tip bearing portion of the arm is moved to the free end of the worm gear. And the worm gear can be supported so as not to be separated from the worm wheel.

According to the fourth aspect of the present invention, the screw is screwed into the screw hole of the traverse chassis through the screw insertion portion formed in the bottom plate of the bearing main body. Can be fixed to the traverse chassis.

1 to 5 show a DVD player (disk device) according to an embodiment of the present invention. Both hook pieces 28c are integrally formed on a side plate 28b of a bearing body 28A forming a worm bearing 28. FIG. A pair of slits 35, each having a rising width 35 having a width t2 that is the same as or slightly smaller than the interval t1 and projecting integrally with the edge piece 29 of the traverse chassis 4 and parallel to both hooking pieces 28c at the center of the side plate 28b. A hook 37a is integrally formed at the tip of the elastically displaceable elastic piece 37 left uncut by forming 36, and a hook hole 38 is formed through the edge piece 29 so as to face the hook 37a. In order to allow the elastic displacement of 37, a gap 39 communicating with both slits 36 is formed in the bottom plate 28a so as to surround the elastic piece 37. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 7 to 12, the same parts are denoted by the same reference numerals and the description thereof is omitted.

The procedure for fixing the worm bearing 28 will be described.
8c is engaged, and both the hooking pieces 28c are hooked on the edge piece 29, and the positioning pin 28f is fitted into the positioning hole 30. At the same time, the elastic piece 37 is elastically displaced to hook the hook 37a into the hook hole 38. The bearing body 28A is fixed to the traverse chassis 4 by fitting, and the tip bearing portion 28d of the arm 28B is applied to the free end of the worm gear 13B.

According to the above configuration, when fixing the worm bearing 28 to the traverse chassis 4,
The hook pieces 28c are engaged with both side edges 35a of the rising piece 35, the hook pieces 28c are hooked on the edge pieces 29, and the elastic pieces 37 are elastically displaced so that the hooks 37a are hooked into the hook holes 38.
It is only necessary to fit it in, and the fixing work can be performed quickly and easily.

Further, by engaging both hooking pieces 28 c with both side edges 35 a of the rising piece 35, the two hooking pieces 28 c are counteracted against the load in the forward and backward a and b directions along the longitudinal direction of the edge piece 29.
Against the load in the left and right directions g and h orthogonal to the forward and backward a and b directions,
By fitting the hook 37a into the hook hole 38, it is designed to resist loads in the vertical directions i and j orthogonal to the forward and backward movements a and b and the left and right directions g and h. The screw 32 for fixing the bearing (see FIG. 12) is unnecessary, and the screw hole 31 (see FIG. 12) for screwing the screw is also unnecessary. Can do.

As shown in FIG. 2, a reinforcing projection 40 is integrally provided at the base end portion of the arm 28B, whereby the base end portion of the arm 28B is reinforced, so that the arm 28B is relatively strong and elastic. The tip end bearing portion 28d of the arm 28B is displaced and reliably pressed against the free end of the worm gear 13B, so that the worm gear 13B can be supported so as not to be separated from the worm wheel 13A.

In the above embodiment, it has been described that the screw 32 and the screw hole 31 are unnecessary. However, as a precaution, the screw hole 31 is formed in the traverse chassis 4 as shown in FIG. It is preferable to form a semicircular screw insertion portion 41 in the bottom plate 28a against
In this case, as shown in FIG. 6, the bottom plate 28a is fastened to the traverse chassis 4 by screwing screws 32 into the screw holes 31 through the screw insertion portions 41 as necessary. Similarly, the bearing body 28 </ b> A can be fixed to the traverse chassis 4.

In the above embodiment, the DVD player has been described as an example. However, the present invention is not limited to this, and the present invention is also applicable to various disk devices such as a DVD recorder.

It is a bottom side perspective view of the principal part of the disc apparatus which is one Embodiment of this invention. It is a front side perspective view of the same warm bearing. It is a back surface side perspective view of the warm bearing. It is a front side exploded perspective view of the warm bearing. (A) is a front view of the warm bearing, (b) is the same plan view, (c) is an AA arrow view, (d) is a BB arrow view. (A) is a top view which shows the modification, (b) is CC arrow line view. 1 is a schematic plan view of a disk device. It is the longitudinal cross-sectional view. It is a lower surface side perspective view of a prior art example. It is a front side perspective view of the same warm bearing. It is a back surface side perspective view of the warm bearing. It is a back surface side exploded perspective view of the warm bearing.

Explanation of symbols

4 Traverse Chassis 4a Central Opening of Traverse Chassis 6 Turntable 8 Optical Pickup 12 Rack and Pinion Mechanism 13 Worm Mechanism 13A Worm Wheel 13B Worm Gear 14 Feed Motor 28 Worm Bearing 28A Bearing Body of Worm Bearing 28B Worm bearing arm 28a Bearing body bottom plate 28b Bearing body side plate 28c Bearing body hook piece 28d Arm tip bearing part 29 Edge piece 32 Screw 35 Rising piece 36 Slit 37 Elastic piece 37a Hook 38 Hook hole 40 Reinforcing protrusion Part 41 Screw insertion part D disk

Claims (4)

An optical pickup is disposed in a central opening of a traverse chassis on which a disk mounting turntable is mounted so as to be able to reciprocate along the radial direction of the disk, and the optical pickup is reciprocated through a rack and pinion mechanism and a worm mechanism. And a synthetic resin worm bearing for supporting a free end of a worm gear meshing with a worm wheel of the worm mechanism has a bottom plate and a side plate integrally joined to each other at right angles. A bearing body and a substantially L-shaped arm that is elastically displaceable extending laterally from the side plate of the bearing body, and is integrated with both side edges of the side plate at edge pieces bent at a substantially right angle from the side edge of the central opening. By hooking the formed pair of hook pieces and fixing the bottom plate to the traverse chassis with screws, The end bearing portion the Wo - and abutting the free end of Mugiya,
The disk is rotated at high speed by the turntable, the optical pickup is reciprocated through the worm mechanism and the rack and pinion mechanism by the feed motor, the laser beam is projected from the optical pickup toward the disk, and the reflected light is used. In the disk device that reads the information recorded on the disk, the screws are omitted, and a rising piece having a width that is the same as or slightly smaller than the interval between the two hooking pieces is integrally projected on the edge piece, A hook is integrally formed at the tip of an elastically displaceable elastic piece left uncut by forming a pair of slits parallel to both hooking pieces at a predetermined interval in the center of the side plate, and facing the hook. A hook hole is formed through the edge piece, and both hook pieces are engaged with both side edges of the rising piece, and the hook pieces are used as edge pieces. By hooking and fitting the hook into the hook hole, the bearing body is fixed on the traverse chassis, a reinforcing projection is integrally projected at the base end of the arm, and the screw hole of the traverse chassis is formed on the bottom plate. A disk device characterized in that a screw insertion portion is formed oppositely. An optical pickup is disposed in a central opening of a traverse chassis on which a disk mounting turntable is mounted so as to be able to reciprocate along the radial direction of the disk, and the optical pickup is reciprocated through a rack and pinion mechanism and a worm mechanism. And a synthetic resin worm bearing for supporting a free end of a worm gear meshing with a worm wheel of the worm mechanism has a bottom plate and a side plate integrally joined to each other at right angles. A bearing body and a substantially L-shaped arm that is elastically displaceable extending laterally from the side plate of the bearing body, and is integrated with both side edges of the side plate at edge pieces bent at a substantially right angle from the side edge of the central opening. By hooking the formed pair of hook pieces and fixing the bottom plate to the traverse chassis, the tip shaft of the arm Is applied to the free end of the worm gear, the disk is rotated at a high speed by a turntable, and the optical pickup is reciprocated through the worm mechanism and the rack and pinion mechanism by a feed motor. In the disk device that projects laser light toward the disk and reads information recorded on the disk based on the reflected light, the rising piece having a width that is the same as or slightly smaller than the interval between the two hooking pieces is A hook is integrally formed on the tip of an elastically displaceable elastic piece that is cut off by forming a pair of slits that are integrally protruded from the edge piece and parallel to both hook pieces at a predetermined interval in the center of the side plate. Both hook holes are formed in the edge piece so as to face the hook, and both hooking pieces are engaged with both side edges of the rising piece. In, hooked both said catching piece in the edge piece, and, by fitting the hook into the hook hole, the disk apparatus characterized by bearing body is fixed on the traverse chassis. The disk device according to claim 2, wherein a reinforcing projection is integrally provided at a base end portion of the arm. 4. The disk device according to claim 2, wherein a screw insertion portion is formed in the bottom plate so as to face a screw hole of the traverse chassis.

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