JP2000207802A - Recording medium reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording medium reproducing device capable of releasing the holding of a recording medium after the recording medium is placed at a specified position of a turntable. SOLUTION: The recording medium reproducing device for reproducing information from a recording medium 120 is constructed in such a manner that the recording medium 120 is held and carried to a position to be held between a turntable 21 and a clamper 42, the recording medium 120, the turntable 21 and the clamper 42 are moved in directions for approaching one another and, when the recording medium 120 is held between the turntable 21 and the clamper 42, the holding of the recording medium 120 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium reproducing apparatus for reproducing information using a recording medium such as a CD (compact disk) and a DVD (digital video disk), and more particularly, to a slot-in system. The present invention relates to a recording medium reproducing device that is accurately placed on a turntable after a recording medium is inserted from an insertion slot.

[0002]

2. Description of the Related Art Conventionally, a recording medium reproducing apparatus for reproducing information by using a recording medium such as a CD or a DVD generally has a turntable on which a recording medium is mounted and a turntable which can approach and separate from the turntable. And an optical pickup provided. Then, the recording medium is horizontally mounted on a turntable attached to a rotation shaft of a spindle motor, and is driven to rotate. On the other hand, the laser beam is radiated perpendicularly to the information recording surface of the recording medium by the objective lens of the optical pickup, and the information is recorded on the information recording surface while the objective lens is horizontally moved radially outward from the inner periphery of the recording medium. An information signal is reproduced.

As a disk mounting method for such a recording medium reproducing apparatus, there is a so-called slot-in method in which a recording medium is directly inserted into a main body of the apparatus from a recording medium insertion port. Although the slot-in type recording medium reproducing apparatus is mainly used as an in-vehicle CD player, a structure that is resistant to vibration is required in its use environment.

FIG. 10 is a structural diagram of a main part of a slot-in system in a recording medium reproducing apparatus. For example, FIG.
When the recording medium 3 is inserted from the insertion opening 2 of the device main body 1 as shown in FIG. 1A, the recording medium 3 is sandwiched between the guide member 4 and the roller 5 and the rotation of the roller 5 causes the device main body 1 to rotate.
Conveyed inside. When the recording medium 3 is conveyed to a predetermined position, the rollers 5 are moved to the recording medium 3 as shown in FIG.
In the direction of the arrow. Thereafter, the turntable 6 moves upward as shown in FIG.
Is inserted into the central hole of the recording medium 3, is sandwiched between the turntable 6 and the clamper 7, and the recording medium 3 rotates with the rotation of the turntable 6.

[0005]

Generally, a slot-in type transport mechanism transports a recording medium to a predetermined position inside the apparatus main body with the recording medium sandwiched between the guide member 4 and the roller 5 or two rollers. The roller 5 is configured to separate from the recording medium 3 before being sandwiched between the clamper 7 and the turntable 6. As described above, in the case of a vehicle-mounted device, since the environment is always subject to vibration, even when the recording medium 3 is released from the sandwiched state even temporarily, the recording medium 3 moves due to the vibration, and the turntable is accurately moved. 6 and a malfunction occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a recording medium reproducing apparatus configured to release the holding of a recording medium after the recording medium is placed at a predetermined position on a turntable. To provide.

[0007]

According to the first aspect of the present invention,
A recording medium reproducing apparatus for reproducing information from a recording medium, comprising: a turntable for rotating the recording medium; a clamper for clamping the recording medium in cooperation with the turntable; and a turntable and a clamper for clamping the recording medium. A conveyance mechanism that conveys the recording medium to a position that can be pinched between the recording medium and the recording medium and that can move in a direction in which the recording medium and the turntable or the clamper relatively approach each other, the conveyance mechanism includes: When the recording medium is clamped by the turntable and the clamper, the clamping of the recording medium is released.

According to a second aspect of the present invention, in the recording medium reproducing apparatus according to the first aspect, the transport mechanism has a roller and a guide member, and the recording medium is held between the roller and the guide member. The recording medium is transported to a position where the recording medium can be held between the turntable and the clamper by the rotation of.

According to a third aspect of the present invention, there is provided the recording medium reproducing apparatus according to the first aspect, wherein the biasing member biases the roller and the guide member so as to be rotatable in the same direction. And a regulating member that controls the regulation of the rotation of the roller and the guide member and the release of the regulation of the rotation of the guide member, and the holding of the recording medium by the roller and the guide member and the release of the clamping are performed based on the control by the regulation member. The configuration is as follows.

[0010]

The recording medium reproducing apparatus of the present invention has a transport mechanism which can move the recording medium and the turntable or the clamper in a direction in which the recording medium and the turntable or the clamper are relatively approached while sandwiching the recording medium.
When the recording medium is clamped by the turntable and the clamper, the clamping of the recording medium is released.
It is not affected by vibration. The transport mechanism is
Since the recording medium has a roller and a guide member, the recording medium is nipped between the roller and the guide member, and the recording medium is conveyed to a position where the recording medium can be nipped between the turntable and the clamper by the rotation of the roller. It is accurately transported to a predetermined position on the table.

An urging member for urging the roller and the guide member so as to be rotatable in the same direction, and a regulating member for controlling the regulation of the rotation of the roller and the guide member and the release of the regulation by the urging member. With the configuration in which the recording medium is nipped and released by the roller and the guide member based on the control by the restriction member, the rotation of the roller and the guide member can be restricted with a simple structure. The rotation restriction is released.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In describing a structure of a recording medium reproducing apparatus according to an embodiment of the present invention, the recording medium reproducing apparatus has a structure in which a bottom surface side of a chassis is opened.
Each structural diagram is shown in a form viewed from the bottom side. The recording medium reproducing apparatus will be described below in which the right side of the paper is the front side where the recording medium is inserted, the left side is the rear side, the upper side of the paper is the left side of the recording medium reproducing apparatus, and the lower side of the paper is the right side.

FIG. 1A is a plan view of the recording medium reproducing apparatus, and FIG. 1B is a right side of the recording medium reproducing apparatus. FIG. 2A is a plan view of the rotary drive unit A when the right side plate 12 of the casing 10 of the recording medium reproducing device is removed, FIG. 2B is a right side view of the rotary drive unit A, FIG.
(C) has shown the front view of the rotation drive part A. FIG. 3A is a plan view including the rotation driving unit A when the right side plate 12 of the housing 10 is removed and a guide plate 15 that presses a non-recording surface of a recording medium 120 described later. (b) is a right side view of the plan view. 4A is a plan view of the recording medium reproducing apparatus with the right side plate 12 removed, and FIG. 4B is a right side view of the recording medium reproducing apparatus. FIGS. 5 and 6 are explanatory diagrams of the operation of the transport mechanism section B. The structure and operation of the recording medium reproducing apparatus will be described with reference to FIGS.

As shown in FIG. 1, the recording medium reproducing apparatus is a lifting chassis which is supported in a vibration-resistant manner by four dampers 13a to 13d fixed to a left side plate 11 and a right side plate 12 of a housing 10 by fixing members 14. A rotation driving unit A including a clamp 20 and a clamper support plate 40; and a holding cam 60, a driving cam 70, a roller elevating lever 80, a holding lever 90, which are disposed on a sub-chassis 50 fixed to the housing 10 with screws or the like. The transport mechanism section B includes a pressing cam 100, a roller section 110, and a guide plate 15 on which a guide member 15a is formed.

As shown in FIG. 2 (b), the lifting chassis 20 has a rotating piece 27 formed by bending both sides on the back side into an L shape, and holding pins 26a and 26b are implanted on the rotating piece 27. At the same time, holding pins 26c and 26d are implanted on both side surfaces on the front side of the elevating chassis 20. Similarly to the lifting chassis 20, the clamper support plate 40 is formed with a rotating piece 41 having both sides on the back side bent in an L shape.
By inserting the holding pins 26a and 26b implanted on the back side of the lifting chassis 20 into the round holes provided in the rotating piece 41, the lifting chassis 20 and the clamper support plate 40 support the holding pins 26a and 26b as fulcrums. Are rotatably mounted on each other. A spring 44 is provided between the lift chassis 20 and the clamper support plate 40, and the turntable 21 of the lift chassis 20 and the clamper 42 of the clamper support plate 40 are provided.
Are biased in a direction to approach each other.

The four dampers 13a to 13d fixed to the left and right side plates 11 and 12 of the housing 10 are formed in a triangular pyramid shape with butyl rubber or the like, and are holding members into which a viscous fluid is injected. 4 with a spherical tip
The tips of the holding pins 26a to 26d are connected to the dampers 13a to 1d.
By being immersed in the 3d head, the front side of the elevating chassis 20 is held so as to be openable and closable, and the elevating chassis 20 and the clamper support plate 40 are supported by the housing 10 in a vibration-resistant manner.

Elevating chassis 20 that constitutes rotary drive section A
, A stepping motor 22 on which a turntable 21 is pivotally mounted, a pickup 24 suspended on two transport rails 23, a pickup drive motor 25, and the like are provided. A curved sliding hole 28 is formed in the bottom surface of the elevating chassis 20, and a T-shaped fixing screw 30 is provided in the sliding hole 28 from the inside of the elevating chassis 20.
Is slidably suspended by the lift lever 29
Are urged toward the front side of the rotation drive unit A by a spring (not shown). At one end (back side) of the lifting lever 29, a ring 32 is rotatably mounted on a holding portion 31 bent in a U-shape, and the ring 32 is mounted on a lifting piece 43 formed on a clamper support plate 40 described later. Contacted.

On the other hand, as shown in FIG. 2, a clamper 42 is rotatably supported on a clamper support plate 40 constituting the rotary drive section A at a position facing the turntable 21 of the lifting chassis 20. An elevating piece 43 that contacts the ring 32 that moves with respect to the elevating chassis 20 is formed, and the head of the elevating piece 43 is composed of a flat portion 43a and an inclined portion 43b whose front side is inclined. A detection lever 45 for detecting that the recording medium 120 has been conveyed to a predetermined position is rotatably mounted on the rotation shaft 45c on the clamper support plate 40. The detection lever 4 is rotated by a spring (not shown).
The fifth detector 45a is urged toward the front. When the detection portion 45a of the detection lever 45 is pressed by the outer peripheral edge of the recording medium 120, the detection lever 45 rotates counterclockwise around the rotation shaft 45c in FIG. Presses the rack 46. The rack 46 is engaged with a driving gear 47 described later by being pressed by the pressing portion 45 b of the detection lever 45.

The rack 46 is connected to a slide plate 17 disposed on the side surface of the right side plate 12 of the housing 10.
The slide plate 17 moves in the front-rear direction along the right side plate 12 with the movement of. The front surface of the slide plate 17 has a drive surface 17b bent in an L shape toward the roller drive gear 115 of a roller unit 110 constituting a transport mechanism unit B, which will be described later. A pressing piece 17c bent in an L shape is formed on the surface side, and a U-shaped
A groove 17a is formed. The slide plate 17 is urged rearward by an urging member (not shown), and
5 is moved to the front side by being pressed by the pressing portion 45b.

When the slide plate 17 is moved to the front side by the pressing of the detection lever 45 in FIG. 1A, the U-shaped groove 17a of the slide plate 17 is formed in the hook 74 formed in the hook 74 of the drive cam 70. The pin 75 is pressed. When the drive receiving pin 75 is pressed, the drive cam 70 rotates, and the pressing cam 100 presses the elevating lever 29. Lift lever 2
9 is pressed, the ring 32 is disengaged from the elevating piece 43, and the elevating chassis 20 is raised.
And the clamper 42 comes closer to the closed state of the rotation drive unit A. The pressing piece 17c of the slide plate 17 is provided for pressing a roller shaft 114 that constitutes a roller unit 110 described later. When the slide plate 17 is located on the back side, the pressing piece 17c is provided. 17c presses the roller shaft 114, moves the roller drive gear 115 and the transport roller 112 to the top side, and when the slide plate 17 moves to the front side,
The roller drive gear 115 and the transport roller 112 are configured to move to the bottom side.

FIG. 2C shows the front of the lifting chassis 20.
As shown in FIG. 5, a holding plate 33 is provided for holding the lifting chassis 20 so as not to move up and down due to vibration of the vehicle body when the lifting chassis 20 is in the open state. Holding plate 33
Has two holding holes 3 having surfaces inclined outwardly from each other.
The hooks 64 of the holding cam 60 and the hooks 92 of the holding lever 90 described below hold and fix the lifting chassis 20 by sandwiching the holding holes 34 of the holding plate 33 from both sides.

As shown in FIG. 3A, a guide plate 15 for pressing the non-recording surface of the recording medium 120 is provided in front of the rotary drive section A, and a part of the guide plate 15 has a smooth surface. A resin guide member 15a is formed. Guide plate 1
One end (right side) of 5 is bent into an L-shape, and a T-shaped fixing screw 19 is inserted into a lifting hole 18 of a slide plate 17 whose tip is slidably disposed on the left plate 12 of the housing 10. A sliding pin 19a is pivotally mounted on the right side of the front surface of the guide plate 15, and the front surface of the guide plate 15 is biased toward the bottom surface of the housing 10 by a spring 16.
As shown in FIG. 3 (b), the elevating hole 18 formed in the slide plate 17 is a groove which is inclined toward the bottom side as it goes to the front side. The outer peripheral edge of the top surface side of the slide plate 17 has an inclined portion 17 d having the same inclination as the elevating hole 18.
The sliding pin 19a implanted in the guide plate 15 slides on the inclined portion 17d. Therefore, when the slide plate 17 moves to the front side, the fixing pin 19 of the guide plate 15 moves along the elevating hole 18 of the slide plate 17 and the slide pin 19a of the guide plate 15 moves.
Slides along the inclined portion 17d of the slide plate 17, and the guide plate 15 moves horizontally to the top surface side against the spring 16. When the slide plate 17 moves to the back side, the guide plate 15 is configured to move horizontally to the bottom side while being held by the fixing pins 19 and the slide pins 19a.

At a position inside the right side plate 12 of the housing 10,
As shown in FIG. 4, a transmission gear 49, a conversion gear 48, a drive gear 47, and a rack 46 are provided. The rotation of the drive motor (not shown) is transmitted and reduced in the order of the transmission gear 49, the conversion gear 48, and the drive gear 47, and the teeth of the drive gear 47 mesh with the teeth of the rack 46. It is converted into 46 linear motions. The rack 46 is pressed by the detection lever 45, meshes with the drive gear 47 by approaching the drive gear 47, and slides the slide plate 17 to the front side with the rotation of the drive gear 47.

The rotation of the transmission gear 49 is transmitted to the roller drive gear 115 of the roller unit 110 constituting the transport mechanism B. When the rotation drive unit A is in the open state, a roller unit 100 described later rotates, and as shown in FIG. 4B, the roller drive gear 115 is arranged obliquely, and the transmission gear 49 and the roller drive gear 115 mesh with each other. , The roller drive gear 115 rotates. On the other hand, when the rotation drive unit A is in the closed state, the roller unit 1
00 is horizontal, the transmission gear 49 and the roller drive gear 11
5 are separated from each other and the rotation of the roller drive gear 115 is stopped.

On the other hand, as shown in FIGS. 5 and 6, the transport mechanism portion B is provided with a holding plate 3 disposed on the front surface of the elevating chassis 20.
3, a holding cam 60 rotatably mounted on the sub-chassis 50, a driving cam 70 driven by the slide plate 17, and a roller portion 11 for holding one end of the holding hole 34.
0, a holding lever 90 for holding the other end of the holding hole 34 of the holding plate 33, a pressing cam 100 for pressing the lifting lever 29 suspended on the lifting chassis 20, a roller unit 110, The guide plate 15 is provided.

As shown in FIG.
The roller lifting lever 80 and the holding lever 9
O-shaped sliding holes 51 and 52 that slide through 0 are formed, and roller holding brackets 53 that are integrally bent with the sub-chassis 50 in an L shape are formed on both short sides of the sub-chassis 50. On the inner surface of the sub-chassis 50, a holding cam 60 is rotatably mounted on a shaft by a fixing screw 61. The holding cam 60 has a curved elliptical sliding hole 62 formed therein and has a cylindrical shape at a predetermined position. Drive pins 63 are implanted. The tip of the holding cam 60 is formed with a hook portion 64 that fits into the narrowest portion 34 a of the holding hole 34 formed in the holding plate 33.

Further, as shown in FIG.
Numeral 0 is rotatably mounted on the sub-chassis 50 by a fixing screw 71. The drive cam 70 is positioned at a predetermined position.
The columnar drive pins 72 and 73 are implanted, and the drive pin 72 is attached to the holding cam 6 previously mounted on the sub-chassis 50.
0 is inserted into the sliding hole 62. A drive receiving pin 75 is implanted in a hook 74 at the outer peripheral edge of the drive cam 70,
When the slide plate 17 described above slides, the slide plate 17
Into the U-shaped groove 17a formed in the
The driving cam 70 is rotated around the fixed screw 71 as a rotation axis in accordance with the movement of the driving cam 70. For example, when the hook 74 of the driving cam 70 receives a force in the direction of arrow C in the figure, the driving cam 70
1, the driving pin 72 implanted in the driving cam 70 slides along the sliding hole 62 of the holding cam 60, and the holding cam 60 is turned about the fixing screw 61 as a fulcrum. Cam 6
The 0 hook 64 is moved in the direction of arrow D. Therefore, when the hook 74 of the driving cam 70 receives a force in the direction of arrow C, the hook 64 of the holding cam 60 comes off the narrowest portion 34a of the holding hole 34 of the holding plate 33, and the fixing of the lifting chassis 20 is released. You.

Next, as shown in FIG. 5C, a T-shaped fixing screw 81 is inserted into a sliding hole 51 formed in the sub-chassis 50.
As a result, the roller lifting lever 80 is slidably suspended.
One end of roller elevating lever 80 (near drive cam 70)
Has a curved sliding hole 82 formed therein.
The driving pin 73 implanted in the driving cam 70 previously mounted on the sub-chassis 50 is inserted. Roller lifting lever 8
Two drive pieces 83 partially bent in an L shape on the long side surface of the zero
When the hook 74 of the drive cam 70 receives a force in the direction of arrow C, the drive pin 73 of the drive cam 70 presses the sliding hole 82 of the roller lift lever 80, and the roller lift lever 8
0 is slid in the direction of arrow D to press a projecting piece 116 of the roller unit 110 described later.

Next, as shown in FIG. 6A, a T-shaped fixing screw 91 is inserted into a sliding hole 52 formed in the sub-chassis 50.
Thereby, the holding lever 90 is slidably suspended. The holding lever 90 is formed with a hook portion 92 that fits into the narrowest portion 34a of the holding hole 34 formed in the holding plate 33. A sliding hole 93 curved toward the drive cam 70 is formed at one end of the holding lever 90.
Are formed. The driving pin 63 of the holding cam 60 previously mounted on the sub-chassis 50 is inserted into the sliding hole 93. The fixing screw 91 of the holding lever 90 includes:
Locked between the sub-chassis 50 and a spring 94,
It is urged in the direction of arrow E in the figure. When the hook 74 of the driving cam 70 receives a force in the direction of arrow C in the figure, the driving cam 70
As a result, the holding cam 60 rotates. When the holding cam 60 rotates, the driving pin 63 of the holding cam 60 presses the sliding hole 93 of the holding lever 90, and moves the holding lever 90 in the direction of arrow E. When the holding lever 90 moves in the direction of the arrow E, the hook portion 92 of the holding lever 90 is disengaged from the narrowest portion 34a of the holding hole 34 of the holding plate 33, and the fixing of the lifting chassis 20 is released in cooperation with the holding cam 60. You.

Next, as shown in FIG. 6 (b), a pressing cam 100 is rotatably mounted on the sub-chassis 50 by a fixed screw 101, and is driven between the sub-chassis 50 by a spring 104. It is urged to the side opposite to 70. A roller 102 is rotatably mounted on the tip of the pressing cam 100, and the roller 1 is placed on the surface of the pressing cam 100.
An oblong sliding hole 103 extending to the side opposite to 02 is formed. In the sliding hole 103 of the pressing cam 100, the driving pin 72 implanted in the driving cam 70 previously mounted on the sub-chassis 50 is inserted. Therefore, the driving pin 72 of the driving cam 70 is connected to the sliding hole 62 of the holding cam 60 and the pressing cam 1.
00 is inserted into the sliding hole 103. As described above, when the hook 74 of the driving cam 70 receives a force in the direction of arrow C in the figure, the driving pin 72 of the driving cam 70 presses the sliding hole 103 of the pressing cam 100, and the tip of the pressing cam 100 is It turns in the F direction.

FIG. 6C is a plan view of the roller unit 110, and FIG. 6D is a front view of the roller unit 110. The roller unit 110 includes a roller plate 111 and a transport roller 11.
The transport roller 112 has a truncated cone-shaped elastic member, such as rubber, whose diameter becomes larger toward the outside, is fitted into the roller shaft 114, and a roller driving gear 115 is fixed to the tip of the roller shaft 114. I have. On the other hand, the roller plate 111 has a holding portion 113 that rotatably holds a roller shaft 114 whose both short sides are bent in an L shape, and a long side that is pressed by the driving pieces 83 and 84 of the roller lifting lever 80. Two protruding pieces 1 formed by bending a part into an L shape
16, when the recording medium 120 is mounted on the rotation drive unit A, the cushioning member 1 is provided on the surface to cover the insertion opening of the rotation drive unit A.
The two protection pieces 117 to which 18 is attached are formed. The projecting piece 116 is composed of an inclined portion 116a in which the drive cam 70 side is partially inclined and a flat portion 116b.

The roller section 110 is a roller plate 1
The sub-chassis 50 is rotatably mounted on a roller holding bracket 53 by a fixing pin 119 implanted in the holding portion 113 of the sub-chassis 50. When the roller portion 110 is pivotally mounted on the sub-chassis 50, the protrusions 11 formed on the roller plate 111 are rotated.
6 is arranged at a position where it contacts the driving pieces 83 and 84 of the roller lifting lever 80. When the driving cam 70 rotates in the same manner as described above, the driving cam 70 rotates about the fixed screw 71 as a fulcrum, and the driving pin 73 of the driving cam 70 slides in the sliding hole 82 of the roller lifting lever 80, and the roller lifting lever 80 Is slid in the direction of arrow C.

As the roller lift lever 80 slides, the driving piece 83 of the roller lift lever 80 slides and presses the inclined portion 116 a of the protrusion 116 of the roller plate 111. The roller plate 111 is a sub-chassis 5
The roller plate 111 is inclined with respect to the sub-chassis 50 with the fixing pin 119 as a fulcrum when the drive piece 83 presses the inclined portion 116 a because the roller plate 111 is rotatably mounted on the shaft. The roller plate is a spring 11
1a, the roller plate 111 is returned to a position horizontal to the sub-chassis 50 when the driving piece 83 is removed from the inclined portion 116a. When the roller plate 111 is inclined, the rotation of the transmission gear 49 is transmitted to the roller drive gear 115 as described above, and the transport roller 112 rotates, that is, the recording medium 120 can be transported.

Here, the operation of the recording medium reproducing apparatus according to the embodiment of the present invention will be described in detail with reference to FIGS. FIG. 7 shows a state in which the front side of the rotation drive unit A of the recording medium reproducing apparatus is open and the recording medium 120 can be inserted, and shows an initial state of the operation description. Also, FIG.
This shows a state in which, after the recording medium 120 is conveyed to the recording medium reproducing device, the recording medium 120 is nipped by the pressing member 15a and the conveying roller 112 and is moved onto the turntable 21. FIG. 9 shows a state in which the recording medium 120 is sandwiched between the turntable 21 and the clamper 42 in the recording medium reproducing apparatus, that is, a state in which the recording medium 120 is reproduced. In describing the operation of the recording medium reproducing device, in addition to the plan view (a) and the side view (b) in each of FIGS.
A description will be given with reference to a side view (c) of the slide plate 17 disposed in FIG.

First, an initial state of the recording medium reproducing apparatus will be described with reference to FIG. Recording medium 120 in the recording medium reproducing device
Is not inserted, the slide plate 17 is urged to the rear side of the housing 10, and the hook 74 of the drive cam 70 constituting the transport mechanism B is located on the rear side. Therefore,
The holding cam 60 and the roller lifting lever 80 are slid in the direction of arrow E, and the holding lever 90 is slid in the direction of arrow D. In this state, the hook portion 64 of the holding cam 60 and the hook portion 92 of the holding lever 90 hold and fix the narrowest portion 34a of the holding hole 34 of the holding plate 33 provided on the front surface of the rotation drive unit A. I have.

The pressing cam 100 of the transport mechanism B is
Since the hook 74 of the drive cam 70 is located on the rear side, the hook 74 is in a position rotated in the direction of arrow G, and
Is pressed to the back side. Since the lift lever 29 is at the position moved to the rear side, the ring 32 of the lift lever 29 rides on the lift piece 43 formed on the clamper support plate 40, and the lift chassis 20 is moved to the bottom side of the housing 10. And the turntable 21 and the clamper 42 are separated from each other. Further, since the slide plate 17 is urged to the rear side, the pressing piece 17c of the slide plate 17 presses the roller shaft 114 constituting the roller unit 110. When the slide plate 17 is at a position moved to the rear side, the roller shaft 114 is pressed by the pressing piece 17c of the slide plate 1 against the bias of the spring 111a. It will be in an inclined state. Therefore,
The roller drive gear 115 is in a state of being meshed with the transmission gear 49. The above is the initial state of the recording medium reproducing apparatus, that is, the state where the recording medium 120 can be inserted. Here, the state in which the roller unit 110 is inclined is a state in which the roller unit 110 is moving to the bottom surface side of the housing 10, and moving to the horizontal state means that the roller unit 110 is raised to the top surface side. Means.

Next, the operation when the recording medium 120 is inserted will be described. When the recording medium 120 is inserted from the insertion slot with the recording surface of the recording medium 120 facing down (the bottom side of the housing 10) by the operator, a photodetector (not shown) provided inside the insertion slot is provided. The insertion of the recording medium 120 is detected.
Upon receiving a detection signal from the photodetector, a CPU (not shown) incorporated in the recording medium reproducing device rotates a drive motor (not shown). The rotation of the drive motor is transmitted to the roller drive gear 115 of the roller unit 110 via the transmission gear 49, and the recording medium 120 is conveyed to the inside of the recording medium reproducing device by the conveyance roller 112 which is mounted on the roller drive gear 115. Rotate in the direction. The recording medium 120 is conveyed to the inside of the rotation drive unit A while the non-recording surface side is pressed by the guide member 15a, and the recording surface side is sandwiched by the conveying rollers 112.

On the other hand, the rotation of the drive motor is
Thus, the speed is reduced and transmitted by the conversion gear 48 and the drive gear 47. At this time, since the drive gear 47 is not engaged with the rack 46, the rotation of the drive motor is not transmitted to the rack 46. When the recording medium 120 is conveyed to a predetermined position in the rotation drive unit A, the outer peripheral edge of the recording medium 120 presses the detection unit 45a of the detection lever 45. Note that the predetermined position of the rotation drive unit A is a position where the center hole of the recording medium 120 is slightly near the center of the centering part 21a of the turntable 21. This slightly before is a distance corresponding to a stroke from when the detection unit 45a is pressed to when the conveyance of the recording medium 120 by the roller unit 110 is released.

The detecting portion 45a rotates with the conveyance of the recording medium 120, and the pressing portion 45b of the detecting lever 45
Press 6. When the rack 46 is pressed by the pressing portion 45b, the teeth of the rack 46 mesh with the teeth of the drive gear 47, and the rotational movement of the drive gear 47 is converted into the linear movement of the rack 46. Move to the front side. Since the rack 46 is connected to the slide plate 17, the slide plate 17 moves to the front side along the right side plate 12. When the slide plate 17 moves to the front side, the pressing piece 17 c of the slide plate 17 comes off the roller shaft 114.

FIG. 8 shows the pressing piece 1 of the slide plate 17 described above.
7c shows a state where the roller shaft 7c is disengaged from the roller shaft 114. That is, when the pressing piece 17 c of the slide plate 17 is disengaged from the roller shaft 114, the roller 110
The roller 1 is returned to the horizontal state by the urging force of 1a, the roller drive gear 115 is separated from the transmission gear 49, and the rotation of the transport roller 112 is stopped. At this time, the rotation of the drive motor stops.

On the other hand, since the guide plate 15 is urged toward the bottom surface of the housing 10 by the spring 16, as the slide plate 17 moves to the front side, the lifting hole 18 of the slide plate 17 and the sliding piece are formed. The fixing pin 19 and the sliding pin 19a of the guide plate 15 move along 17d, and the roller 110
The guide plate 15 moves with the movement of. Accordingly, the recording medium 120 moves in a direction approaching the turntable 21 while being sandwiched between the guide member 15 a of the guide plate 15 and the transport roller 112. The position of the recording medium 120 when the rotation of the conveying roller 112 is stopped corresponds to the position where the center hole of the recording medium 120 is conveyed to the substantially center of the centering portion 21a of the turntable 21. As approaching the table 21, the recording medium 120 moves onto the centering portion 21a of the turntable 21 while being sandwiched between the guide plate 15 and the transport roller 112. At this time, the center hole of the recording medium 120 is conveyed on the centering part 21a of the turntable 21 and substantially coaxially with the centering part 21a.

On the other hand, when the rack 46 continues to move further to the front side as shown in FIG.
a presses the drive receiving pin 75 and rotates the drive cam 70. As the driving cam 70 rotates, the holding cam 60
Moves in the direction of arrow D, and the holding lever 90 moves in the direction of arrow E to separate from the holding hole 34 of the holding plate 33 and release the fixing of the holding plate 33. Further, when the driving cam 70 rotates, the pressing cam 100 rotates in the direction of arrow F. When the pressing cam 100 is removed, the lifting lever 29 is returned to the front side by the bias of the spring. Ring 32 of lifting lever 29
In the process, the elevating chassis 20 gradually rises in the process from the flat portion 43a of the elevating piece 43 to the inclined portion 43b, so that the turntable 21 approaches the recording medium 120.

When the ring 32 of the lift lever 29 comes off the lift piece 43, the centering portion 2 of the turntable 21 is moved.
1a is inserted into the center hole of the recording medium 120, the turntable 21 rises to the top surface side of the housing 10, and the recording medium 1 is clamped by the turntable 21 and the clamper 42.
20, the rotation drive unit A is in a closed state, that is, a reproducible state. In the process of clamping the recording medium 120 by sliding the slide plate 17 to the front side, the guide plate 15 pivotally mounted on the lift hole 18 formed in the slide plate 17 is provided with the lift hole 18 and the sliding piece. It rises along the inclination of 17d, moves from the surface of the recording medium 120 to the bottom side of the housing 10, and releases the guide of the recording medium. Then, the recording medium 120 is separated from the transport roller 112 when the recording medium 120 is sandwiched between the turntable 21 and the clamper 42.

When the CPU detects that the recording medium 120 is placed on the turntable 21, it drives the stepping motor 22 to rotate the turntable 21 at a predetermined speed, and the pickup drive motor 25 picks up the pickup 24. Is transported to a predetermined position, the TOC information of the recording medium 120 is read, and a series of reproducing operations are performed. The CPU stops the rotation of the stepping motor 22 and stops the pickup 2 by the pickup driving motor 25 when the processing of the reproducing operation by the operator is completed.
4 is returned to a predetermined position.

Further, the operator does not show “EJEC
When the "T" button is operated, the CPU confirms that the stepping motor 22 or the turntable 21 is stopped, and then rotates the drive motor (not shown) in the reverse direction. The rotation of the drive motor is controlled by the transmission gear 49, the conversion gear 48, and the drive gear 4.
7 to move the rack 46 to the rear side. Since the rack 46 is connected to the slide plate 17, the slide plate 17 moves rearward (in the direction opposite to the arrow G) as the rack 46 moves. When the slide plate 17 moves, the guide plate 15 moves to the bottom surface side and comes into contact with the non-recording surface side of the recording medium 120. Further, with the movement of the slide plate 17, the drive cam 70 rotates and the pressing cam 100
Roller 102 rotates to the rear side (in the direction opposite to arrow F),
The lifting lever 29 is pressed.

When the elevating lever 29 is pressed, the roller 32 of the elevating lever 29 rides on the elevating piece 43 along the inclined portion 43b of the elevating piece 43 to lower the elevating chassis 20 to the bottom side. Also, the slide plate 17
The pressing piece 17c of the slide plate 17 presses the roller shaft 114 of the roller unit 110 with the movement of
2 is tilted toward the recording surface side of the recording medium 120, and the recording medium 1
20 is held between the guide member 15a and the transport roller 112. When the roller section 110 is inclined, the roller section 1 is rotated.
10, the roller drive gear 115 meshes with the transmission gear 49,
The rotation of the drive motor is transmitted to the roller drive gear 115. Accordingly, the recording medium 120 is discharged from the inside of the housing 10 of the recording medium reproducing apparatus to a predetermined position while being nipped by the guide member 15a and the transport roller 112. The CPU
When it is detected that the recording medium 120 has been ejected to the predetermined position, the rotation of the drive motor is stopped, and the ejection operation processing of the recording medium 120 ends.

In the recording medium reproducing apparatus of the present invention, the recording medium 120 is held between the guide member 15a and the conveying roller 112, and the recording medium 120 is conveyed to a position where the recording medium can be held between the turntable 21 and the clamper 42. Later, the turntable 21 was configured to move up.
You may comprise so that two sides may be lowered.

[0048]

As described above, in the recording medium reproducing apparatus of the present invention, the recording medium 120 is conveyed by the conveying roller 112 and the guide member 15a. When the recording medium 120 is moved to the centering portion 21a of the table 21 and is sandwiched between the turntable 21 and the clamper 42, the guide member 15
Since a is separated from the recording medium 120 to release the pinching, the recording medium 120 can be accurately placed on the tar table 21 without being affected by vibration or the like. Further, the recording medium reproducing apparatus of the present invention includes a recording medium 1
Since the conveyance roller 112 and the guide member 15a which hold the sheet 20 can be urged in the same direction, the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view and a right side view of a rotation drive unit of a recording medium reproducing device of the present invention.

FIG. 2 is a diagram illustrating a rotary drive unit A when a right side plate of the rotary drive unit is removed.
, A right side view and a front view.

FIGS. 3A and 3B are a plan view and a right side view including a rotating unit and a pressing plate when a right side plate of the rotation driving unit is removed. FIGS.

FIG. 4 is a plan view and a right side view when a right side plate of the rotation drive unit is removed.

FIG. 5 is an explanatory diagram of the operation of the transport mechanism.

FIG. 6 is an explanatory view of the operation of the transport mechanism (continuation of FIG. 5).

FIG. 7 is an explanatory diagram of the operation of the recording medium reproducing apparatus (in a state where a recording medium can be inserted).

FIG. 8 is an explanatory diagram of the operation of the recording medium reproducing apparatus (moving state in which the recording medium is nipped).

FIG. 9 is an explanatory diagram of the operation of the recording medium reproducing apparatus (recording medium reproducing state).

FIG. 10 is a diagram illustrating the operation of a conventional recording medium reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Housing 15 ... Guide plate 15a ... Guide member 16 ... Spring 17 ... Slide plate 18 ... Elevating hole 20 ... Elevating chassis 21 ... Turntable 29 ...・ Lifting lever 32 ・ ・ ・ Roller 40 ・ ・ ・ Clamper support plate 42 ・ ・ ・ Clamper

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenji Uchiyama 25-1 Nishimachi, Yamada, Kawaji-shi, Saitama Prefecture Pioneer Corporation Kawagoe Factory F-term (reference) 5D038 AA03 BA01 BA04 CA21 EA27 EA30 GA04 5D046 AA19 CB03 EB01 FA01 FA06 FA07 FA13 HA08

Claims (3)

[Claims] 1. A recording medium reproducing apparatus for reproducing information from a recording medium, comprising: a turntable for rotating the recording medium; a clamper for clamping the recording medium in cooperation with the turntable; To convey the recording medium to a position where it can be clamped between the turntable and the clamper, and the recording medium and the turntable or the clamper relatively approach each other while clamping the recording medium. A transport mechanism that is movable in a direction in which the recording medium is held by the turntable and the clamper. The transport mechanism releases the holding of the recording medium. apparatus. 2. The apparatus according to claim 1, wherein the transport mechanism includes a roller and a guide member, and the recording medium is sandwiched between the roller and the guide member, and can be sandwiched between the turntable and the clamper by rotation of the roller. 2. The recording medium reproducing apparatus according to claim 1, wherein the recording medium is transported to a position. 3. An urging member for urging the roller and the guide member so as to be rotatable in the same direction, and restricting the rotation of the roller and the guide member by the urging member and canceling the restriction of the rotation. 2. The control member according to claim 1, wherein the holding of the recording medium by the roller and the guide member and the release of the holding are performed based on the control by the control member. 3. Recording medium playback device.