JP4084211B2 - Disc transport mechanism of disc player - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc transport mechanism of a disc player that records and / or plays back a disc such as a CD (compact disc) or a DVD (digital versatile disc), and in particular, rotates a roller that sandwiches the disc between guide members. The present invention relates to a disc transport mechanism of a disc player that carries in and takes out the disc by driving.
[0002]
[Prior art]
Conventionally, as a disc transport mechanism of this type of disc player, a guide member fixed to the upper end portion on the front side (disc insertion port side) of the chassis, and a roller biased in a direction approaching the lower surface of the guide member A bracket and a roller rotatably supported by the roller bracket are provided, and the roller sandwiched between the guide member and the roller is rotated by rotating the roller in both directions using a motor as a drive source. A device that is conveyed in an insertion direction or a discharge direction according to the direction is known (see, for example, Patent Document 1).
[0003]
FIG. 7 is a plan view of an essential part showing a conventional example of such a disk transport mechanism, and FIG. 8 is a sectional view of the disk transport mechanism. As shown in these drawings, a guide member 101 is fixed to an upper end portion of the front surface side of the chassis 100, and a roller bracket 102 is rotatably supported at a position below the guide member 101. The bracket 102 is elastically urged in a direction close to the lower surface of the guide member 101 by a spring member (not shown). A rubber roller 103 is rotatably supported on the roller bracket 102. The roller 103 is driven to rotate in both forward and reverse directions by using a motor (not shown) as a drive source.
[0004]
In the conventional disk transport mechanism schematically configured as described above, the disk D is inserted into the inside of a disk insertion opening (not shown) provided on the front side of the chassis 100, and the disk D is inserted into the guide member 101, the roller 103, and the like. When the roller 103 is rotationally driven in the forward direction (arrow A direction in FIG. 8) while being sandwiched between the discs, the disk D is automatically conveyed from the eject position to the play position in the insertion direction (arrow X1 direction). Further, when the disk D is in the play position, the roller 103 is rotated in the reverse direction (arrow B direction in FIG. 8) to automatically convey the disk D from the play position to the eject position (arrow X2 direction) in the ejection direction. Therefore, the disc D can be taken out from the disc insertion slot.
[0005]
[Patent Document 1]
JP 2000-56991 A (page 3, Fig. 1-2)
[0006]
[Problems to be solved by the invention]
By the way, in recent years, a disc player having such a disc transport mechanism tends to be reduced in size and weight. However, since the conventional general roller bracket 102 is formed by pressing a metal plate, The weight of the bracket 102 is a major factor that hinders weight reduction. Thus, it is conceivable to reduce the weight by molding the roller bracket 102 with a synthetic resin material. However, the roller bracket 102 made of synthetic resin has a lower mechanical strength than a metal plate, and thus such a roller bracket 102 is made. As the strength decreases, a new problem occurs.
[0007]
That is, as shown in FIG. 9, when the disc D is transported from the play position to the eject position, if the user pushes the disc D downward again without taking it out from the disc insertion slot, the roller 103 is reversed at this point. Since it is driven to rotate in the direction (arrow B direction), a force to enter the lower side of the roller 103 acts on the disk D, and the disk D bends as indicated by the two-dot chain line of the roller bracket 102. It will end up. As a result, when the roller 103 is further rotated in the reverse direction, the disk D passes through a gap formed between the roller bracket 102 and the roller 103 and enters a place other than the regular conveyance path, and the disk D is inserted. There was a problem of inviting a fatal accident that it was impossible to remove from the disc insertion slot.
[0008]
The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a disc transport mechanism of a disc player that can reliably prevent erroneous insertion such as during a disc ejection operation. is there.
[0009]
[Means for Solving the Problems]
According to the present invention, a claw portion is formed so as to protrude substantially at the center of the roller bracket that rotatably supports the roller, and the claw portion prevents a disc from being erroneously inserted between the roller and the roller bracket. . If such a claw portion is formed on the roller bracket, even if the roller bracket is formed of, for example, a synthetic resin material in order to reduce the weight, the roller bracket and the roller bend in the same way via the claw portion. During the ejection operation, it is possible to reliably prevent the disk from being erroneously inserted into a place other than the regular conveyance path through between the roller bracket and the roller.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In the disc transport mechanism of the disc player according to the present invention, a guide member, a roller bracket biased in a direction approaching the lower surface of the guide member, a roller rotatably supported by the roller bracket, and the roller are rotated. Drive means for driving, and by rotating the roller in the forward direction, the disk sandwiched between the roller and the guide member is conveyed in the insertion direction, and the roller is rotated in the reverse direction. In the disc transport mechanism of the disc player configured to transport the disc sandwiched between the roller and the guide member in the ejecting direction, the rollers are respectively inserted through rotating shafts that are supported by the roller brackets. , A pair of rollers formed in a tapered shape whose diameter increases toward the outside, the inside being a small diameter portion The rotations that face each other with a predetermined distance and that form a claw portion that protrudes in the radial direction of the roller at a substantially central portion of the roller bracket, and the claw portion is exposed between the pair of rollers. By facing the shaft from above , the disc is prevented from being erroneously inserted between the roller and the roller bracket, and the claw portion is a position where the roller can clamp the disc between the guide member and the roller. The roller is configured not to protrude upward from the small diameter portion of the roller.
[0011]
According to the disc transport mechanism of the disc player configured as described above, when the disc is transported from the play position to the eject position, even if the user pushes the disc downward again without removing the disc, the roller bracket and the roller Since it bends in the same way through the claw portion, the disk is not erroneously inserted into a place other than the regular conveyance path between the roller bracket and the roller .
[0012]
In the above configuration, the roller bracket may be formed by pressing a metal plate. However, in order to effectively reduce the weight, the claw portion is formed integrally with the roller bracket formed of a synthetic resin material. It is preferable.
[0014]
【Example】
An embodiment will be described with reference to the drawings. FIG. 1 is a plan view of an in-vehicle disc player according to the embodiment, FIG. 2 is a perspective view in which the top chassis and guide members are removed from the disc player, and FIG. FIG. 4 is a cross-sectional view of the disc transport mechanism, FIG. 5 is a perspective view of a roller bracket and a roller provided in the disc transport mechanism, and FIG. 6 is a perspective view of the disc transport mechanism provided in the player. It is explanatory drawing which shows the disk conveyance operation | movement of this disk conveyance mechanism.
[0015]
As shown in FIGS. 1 and 2, the in-vehicle disc player according to the present embodiment includes a chassis 1 and a top chassis 2 that form an apparatus main body, and the chassis 1 and the top chassis 2 are formed by pressing a metal plate. Consists of things. The front plate 1a bent forward of the chassis 1 is provided with a slit-like disk insertion slot 1b, and the disk D is inserted / discharged from / to the apparatus main body through the disk insertion slot 1b. The top chassis 2 is screwed to the upper surface of the chassis 1, and a guide member 3, a roller bracket 4, and the like that constitute a disk transport mechanism are disposed below the top chassis 2.
[0016]
Further, a drive unit 5 that can be switched between a locked state and an unlocked state is disposed inside the apparatus main body, and the drive unit 5 is fixedly supported with respect to the chassis 1 in the locked state, and a damper or the like in the unlocked state. It is elastically supported via the. The drive unit 5 is equipped with an optical pickup 6, a turntable (not shown), and the like, and an arm clamp 7 is mounted so as to be movable up and down. A clamper 8 facing the turntable is rotatable on the arm clamp 7. It is supported by. A pair of slide members 9 are disposed on the inner surfaces of both side walls of the chassis 1, and these slide members 9 are synchronously moved in the front-rear direction of the chassis 1 using a motor (not shown) as a drive source. When both the slide members 9 move in the front-rear direction, the drive unit 5 is locked / unlocked and the arm clamp 7 is moved up and down, and the guide member 3 and the roller bracket 4 are moved up and down. Operation is to be performed.
[0017]
Further, a pair of detection pins 10 are disposed on the back side of the disk insertion slot 1 b, and the upper ends of these detection pins 10 are inserted into arcuate guide holes 2 a formed in the top chassis 2. The two detection pins 10 are urged toward each other by a spring (not shown), and when the outer peripheral edge of the disk D inserted from the disk insertion slot 1b abuts on both the detection pins 10 and spreads them, FIG. A switch (not shown) is operated to start the motor described above.
[0018]
The roller bracket 4 is formed of a synthetic resin material in order to reduce the weight. As shown in FIGS. 3 to 5, a flat plate portion 4 a extending in a direction perpendicular to the insertion / ejection direction of the disk D, It has a claw portion 4b protruding from the center of the rear end surface of the flat plate portion 4a and a pair of side plate portions 4c protruding in the vertical direction from both side ends of the flat plate portion 4a. The front side (the disc insertion slot 1b side) of these side plate portions 4c is rotatably supported by a locking plate 1c (see FIG. 2) that is bent on the bottom surface of the chassis 1, and the rear end portions of both side plate portions 4c. A metal rotary shaft 11 is rotatably supported on the shaft. A pair of rubber rollers 12 are fitted on the rotating shaft 11, and the rotating shaft 11 and the roller 12 rotate integrally. The roller 12 is formed in a tapered shape whose diameter increases toward the outside. In order to avoid contact with the roller bracket 4, the roller 12 is provided between the outer peripheral surface of both rollers 12 and the rear end surface of the flat plate portion 4 a. Some clearance is secured. However, the inner ends of both rollers 12 face each other with a predetermined distance, and the claw portion 4b of the roller bracket 4 overlaps the rotating shaft 11 exposed from between these rollers 12. As apparent from FIG. 4, the size and height of the claw portion 4 b are such that when the roller 12 is in a position where the disk D can be held between the roller 12 and the guide member 3, It is set so that it may become substantially the same surface, and it is careful so that the nail | claw part 4b may not protrude upwards from the roller 12. FIG.
[0019]
Both end portions of the rotating shaft 11 protrude from the side plate portion 4 c of the roller bracket 4, and these protruding ends are engaged with cam grooves formed in both slide members 9. As a result, when both slide members 9 move synchronously in the front-rear direction, the roller bracket 4 rotates about the engaging portion with the locking plate 1c as a fulcrum, and both rollers 12 approach or separate from the lower surface of the guide member 3. It is supposed to let you. Note that both ends of the guide member 3 are engaged with other cam grooves formed on the slide members 9, and the guide member 3 is moved up and down as the slide members 9 move in the front-rear direction. It has become.
[0020]
Further, the rear end portions of the arm members 13 are inserted into both end portions of the rotating shaft 11, and the front sides of these arm members 13 are rotatably supported on the side walls of the chassis 1. The roller bracket 4 is always applied in a direction close to the lower surface of the guide member 3 (a direction in which the roller 12 is close to the guide member 3) by biasing the arm member 13 in one direction by a spring (not shown). It is energized. Further, a gear 14 is press-fitted and fixed to one end of the rotating shaft 11, and a rotational driving force from another motor (not shown) is transmitted to the rotating shaft 11 through the gear 14. This motor is also started by the rotation of both detection pins 10, and when the rotary shaft 11 is selectively rotated in either the forward or reverse direction using this motor as a drive source, the rotary shaft 11 and the rollers 12 are integrally formed accordingly. Rotate.
[0021]
In the in-vehicle disc player configured as described above, when the disc D is ejected (standby state) when the disc D is not inserted into the apparatus main body, the guide member 3 descends to face the disc insertion slot 1b as shown in FIG. The roller bracket 4 is held at the raised position where the rollers 12 are pressed against the lower surface of the guide member 3. The drive unit 5 is fixedly supported with respect to the chassis 1 and is in a locked state. The arm clamp 7 is held at the raised position, and the clamper 8 is separated from the turntable.
[0022]
In this standby state, when the disk D starts to be inserted into the apparatus main body from the disk insertion slot 1b, the outer peripheral edge on the front end side in the insertion direction of the disk D abuts the detection pin 10, and both detection pins are driven by the insertion force of the disk D It rotates so that 10 may spread outside. As a result, a motor (not shown) is started to rotate the rotating shaft 11, and the rotating shaft 11 and both rollers 12 rotate integrally. When the disk D is further pushed in, the leading end portion in the insertion direction of the disk D is sandwiched between the lower surface of the guide member 3 and the large-diameter portions of both rollers 12, and as shown in FIG. The disk D is automatically conveyed in the insertion direction (arrow X1 direction) by the rotational force in the direction of arrow A. During this time, the drive unit 5 is maintained in the locked state, and the arm clamp 7 is also held in the raised position, so that a transport path for the disk D is secured between the clamper 8 and the turntable.
[0023]
Then, after the center hole of the disk D conveyed in the apparatus main body is aligned with the turntable, when both slide members 9 are moved from the retracted position to the advanced position by a motor (not shown), the guide is interlocked therewith. The member 3 further descends from the lowered position to the lowest position at one end and then rises again to return to the lowered position. The rotating shaft 11 and the roller bracket 4 move downward, and both rollers 12 are separated from the lower surface of the disk D. Further, the arm clamp 7 is lowered and the periphery of the center hole of the disk D is chucked between the clamper 8 and the turntable, and the guide member 3 is moved from the lowered position to the raised position, and further from both rollers 12. As a result, the drive unit 5 is switched from the locked state to the unlocked state to enter the play state. When a spindle motor (not shown) is rotationally driven in this play state, the turntable, the disk D, and the clamper 8 rotate integrally, and information is recorded and / or reproduced on the disk D by the optical pickup 6.
[0024]
Further, when the disc D that has been reproduced is ejected to the outside of the main body of the apparatus, when the user operates an eject button (not shown), the motor rotates in the reverse direction and the reverse operation is performed. Is rotated in the reverse direction (arrow B direction in FIG. 6), the disk D is automatically conveyed in the ejection direction (arrow X2 direction in FIG. 6), and this disk D can be taken out from the disk insertion slot 1b. .
[0025]
Here, during the ejection operation of the disk D or immediately after the ejection is completed, when the user pushes the disk D transported to the ejection position downward again without taking it out from the disk insertion slot 1b, both rollers 12 are reversed at this time. Since the rotation is driven in the direction (the direction of arrow B in FIG. 6), a force to enter the lower side of the roller 12 acts on the disk D, and this force causes the flat plate portion 4a of the roller bracket 4 to bend. However, since the claw portion 4b protruding from the center of the rear end surface of the flat plate portion 4a overlaps the rotating shaft 11 exposed from between both rollers 12, the disk D cannot enter between the roller 12 and the roller bracket 4. Even when the disk D is pushed further downward, the roller bracket 4, the rotary shaft 11, and both rollers 12 bend in the same way via the claw 4 b, so that the disk D is a flat plate portion of the roller bracket 4. It is possible to prevent erroneous insertion into a place other than the regular conveyance path through between the rear end surface of 4a and both rollers 12. In particular, in the case of this embodiment, the mechanical strength of the roller bracket 4 formed of a synthetic resin material is weaker than that using a metal plate, but the claw portion 4b is integrally formed with the roller bracket 4. Thus, it is possible to reliably prevent erroneous insertion of the disk D while reducing the weight.
[0026]
In the above embodiment, the disk transport mechanism in which the guide member 3 is disposed so as to be movable up and down in the chassis 1 has been described. However, the present invention can be applied to a disk transport mechanism in which the guide member 3 is fixed to the chassis 1. Needless to say.
[0027]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0028]
A claw is formed at the approximate center of the roller bracket that rotatably supports the roller, and this claw prevents the disc from being erroneously inserted between the roller and the roller bracket. Even if the roller bracket is formed of, for example, a synthetic resin material, the roller bracket and the roller bend in the same way through the claw portion, and the disc passes between the roller bracket and the roller and is properly It is possible to reliably prevent erroneous insertion into a place other than the transport path .
[Brief description of the drawings]
FIG. 1 is a plan view of an in-vehicle disc player according to an embodiment.
FIG. 2 is a perspective view showing the disc player with a top chassis and a guide member removed.
FIG. 3 is a perspective view showing a disc transport mechanism provided in the disc player, broken away at a central portion.
FIG. 4 is a cross-sectional view of the disk transport mechanism.
FIG. 5 is a perspective view of a roller bracket and a roller provided in the disk transport mechanism.
FIG. 6 is an explanatory diagram showing a disk transport operation of the disk transport mechanism.
FIG. 7 is a plan view of a main part of a conventional disc transport mechanism.
FIG. 8 is a cross-sectional view of the disk transport mechanism.
FIG. 9 is an explanatory diagram showing a problem of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chassis 1b Disc insertion port 3 Guide member 4 Roller bracket 4a Flat plate part 4b Claw part 4c Side plate part 9 Slide member 11 Rotating shaft 12 Roller 13 Arm member 14 Gear D Disk

Claims (2)

A guide member, a roller bracket biased in a direction approaching the lower surface of the guide member, a roller rotatably supported by the roller bracket, and a driving means for driving the roller to rotate. By rotating in the forward direction, the disk sandwiched between the roller and the guide member is conveyed in the insertion direction, and by rotating the roller in the reverse direction, the disk is interposed between the roller and the guide member. In the disc transport mechanism of the disc player that transports the sandwiched disc in the ejection direction,
Each of the rollers is a pair of rollers that are inserted into a rotating shaft that is supported by the roller bracket, and that has a tapered shape whose diameter increases toward the outside. Are facing each other,
A claw portion that protrudes in the radial direction of the roller is formed at a substantially central portion of the roller bracket, and the claw portion is opposed to the rotation shaft exposed between the pair of rollers from above, so that the roller and the roller The disc is prevented from being erroneously inserted between the bracket and the claw portion is located above the small diameter portion of the roller when the roller is in a position where the disc can be sandwiched between the guide member and the roller. A disc transport mechanism for a disc player, wherein the disc transport mechanism is configured not to protrude into the disc.   2. The disk transport mechanism of a disk player according to claim 1, wherein the roller bracket is formed of a synthetic resin material, and the claw portion is integrally formed with the roller bracket.

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