JPH0845156A - Disk loading mechanism - Google Patents

Abstract

PURPOSE:To cope with plural kinds of disks which are different in diameter and to start a clamping operation without using a separate driving source. CONSTITUTION:A disk 100 inserted onto a base 1 is brought into contact with a 1st shaft 2a, and 1st levers 21 and 22 are rotated by a prescribed angle in response to a diameter of the disk, so that a control member 3 is moved in the direction of Y by a prescribed amt. in accordance with the rotated amt. Moreover, the disk 100 is brought into contact with a 2nd shaft 4a, and a 2nd lever 4 is rotated in response to the diameter of the disk by a prescribed angle, so that one of plural driving pins 4c and 4d provided in prescribed positions on the 2nd lever 4 is brought into contact with a contact part 3b of the control member 3, and the control member 3 is rotated around its rotary axis. Also, a clamping mechanism is started to operate by the rotation of the control member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player such as a compact disc, and more particularly to a disc player which is mounted on a vehicle and is capable of reproducing a plurality of discs of different sizes.

[0002]

2. Description of the Related Art In-vehicle disc players and the like are often inserted in the radial direction of the disc in order to make the disc insertion opening small. In addition, the compact disc player requires a disc loading mechanism that automatically detects the disc size to be used and allows the disc to be properly mounted so that discs having different diameters of 8 cm disc and 12 cm disc can be reproduced.

An example of a disc loading mechanism of a compact disc player, which is one of conventional disc players, will be described with reference to FIGS. 6 to 10. 6 and 9 are plan views showing the configuration of a disc loading mechanism of a conventional compact disc player, and FIGS. 7 and 10 are side views thereof. 8 shows the clamp operation mechanism portion of FIG. 6 and 7 show the operation when the 12 cm disc 100 is used, and FIGS. 9 and 10 show the operation when the 8 cm disc 101 is used.

6, FIG. 7, FIG. 9 and FIG. 10, the conventional disc loading mechanism includes a disc insertion opening 1a for inserting the disc 100 or 101, and a disc guide 11 for guiding the disc 100 or 101.
The disk guide 11 from the bottom of the disk 100 or 101
A disc driving roller 12 for moving the disc in and out of the player, a detection lever 13 for detecting the insertion of the disc 100 or 101, and a disc 100 or 101 provided above and below the disc 100 or 101 to block the disc. Photo sensor 14a for detecting the presence or absence,
14b and 14c. Further, as shown in FIG. 8, the conventional disk loading mechanism includes a plunger 15 for switching the disk mounting operation, a slider 18 for clamping the disk 100 or 101 to a turntable (not shown), and a rack portion 18a of the slider 18. And a gear 17 for engaging with and driving the slider 18.

First, the case of using the 12 cm disc 100 will be described. As shown in FIGS. 6 and 7,
When the disc 100 is inserted through the disc insertion opening 1a,
The outer circumference of the disc 100 contacts the shaft portion 13a of the detection lever 13, and the detection lever 13 is rotated about the rotation fulcrum 13b. The mechanical switch 16 is operated by the rotation of the detection switch 13, and the disk drive roller 12
Is rotated in the direction of sucking the disc 100. As shown in FIG. 7, the guide protrusion 13c of the detection lever 13 is convex in the direction of the disc 100, and the 12-centimeter disc 100 rides on the guide protrusion 13c and is provided on the disc guide 11 for the 8-centimeter disc. It passes through the first stopper 11a and hits the second stopper 11b for a 12 cm disc to stop. The state at this time is shown by 100a in FIG. At the position 100a in FIG. 6, the disc 100 is located at the positions of the photosensors 14a, 14b and 14c.
Is present and the mechanical switch 16 is in the state before the insertion, it is confirmed that the feeding of the disc 100 is completed. When the feeding of the disc 100 is completed, the plunger 15 is attracted, and the gear 17 causes the rack portion 1 of the slider 18 to move.
8a, and the operation of clamping the disc 100 on a turntable (not shown) is started.

Next, the case of using the 8-cm disc 101 will be described. As shown in FIGS. 9 and 10,
When the disc 101 is inserted through the disc insertion opening 1a,
The outer periphery of the disc 101 contacts the shaft portion 13a of the detection lever 13, and the detection lever 13 is slightly rotated about the rotation fulcrum 13b. However, since the disk 101 has a small diameter, the detection lever 13 is driven by a driving force such as a spring.
Immediately returned to the original position. Therefore, the guide protrusion 13c does not contact the disc 101, and the disc 101 comes into contact with the first stopper 11a for the 8 cm disc provided on the disc guide 11 and stops. As shown in FIG. 9, since the disc 101a does not exist at the position of the photosensor 14a and the disc 101a exists at the positions of 14B and 14c, the completion of the feeding of the disc 101 is confirmed. When the feeding of the disc 101 is completed, as shown in FIG. 8, the plunger 15 is attracted, the gear 17 engages with the rack portion 18a of the slider 18, and the disc 101 is clamped on a turntable (not shown). To start.

[0007]

However, in the disc loading mechanism of the above-mentioned conventional compact disc player, in order to deal with discs having different diameters, the feed completion position in the radial direction of the disc differs due to the difference in the diameter of the disc. Therefore, after the completion of the radial feeding operation, another drive source such as a plunger for starting the clamping operation is required according to the difference in the diameter of the disc. Therefore, there have been problems that the cost of the disk loading mechanism is increased, the structure is complicated, and the size is increased. Further, depending on the shape of the outer circumference of the disc 100 or 101, the shaft portion 13a of the detection lever 13 and the disc 100
Or 101 has a large contact resistance on the outer periphery, and the disc drive roller 12 or the like causes the disc 100 or 10 to move.
There is a problem that the load for sending 1 is increased, the loading and / or ejecting operation of the disk is blocked, and the operation of the disk loading mechanism is defective.

The present invention has been made in order to solve the problems of the above-mentioned conventional example, and is compatible with a plurality of types of disks having different diameters, and does not require the use of another drive source such as a plunger or the like. An object of the present invention is to provide a disc loading mechanism which can start an operation and can stably perform loading and ejecting of a disc without being influenced by the shape of the outer periphery of the disc.

[0009]

In order to achieve the above object, a disc loading mechanism of the present invention is provided in a base placed substantially parallel to the disc insertion direction and in the vicinity of the disc insertion opening of the base. A first lever rotatably supported about an axis perpendicular to the base and an end portion of the first lever on the side of the disc insertion opening, which is in contact with an outer peripheral portion of the disc, Sliding on the outer peripheral portion of the disk rotates the first lever in a predetermined direction, and is rotatable about a first axis perpendicular to the base and an axis perpendicular to the base. A second lever that is supported and that is disposed rearward of the first lever in the disc insertion direction, and a second lever that is provided in the vicinity of a rear side end of the second lever in the disc insertion direction and that has the disc outer periphery. Abut Rotating said second lever in a predetermined direction by sliding on the outer periphery of the disk portion,
A second axis perpendicular to the base and a plurality of perpendicular to the base that are provided at different positions on the second lever and function corresponding to a plurality of discs of different diameters. A drive pin, which is slidable in a predetermined direction on the base and rotatably supported about an axis perpendicular to the base, is engaged directly or indirectly with the first lever, The first lever slides in the predetermined direction as the lever rotates, and contacts the drive pin provided on the second lever to rotate the control member 1
And a control member that rotates in a predetermined direction by rotation of the second lever. In the above structure, the control member slides in a direction substantially orthogonal to the disc insertion direction, the displacement amount is different with respect to the diameter of the disc, and the plurality of drive pins move the rotation shaft of the second lever. It is preferable that they are provided on concentric circles having different radii as the center. Further, in the above structure, the displacement amount of the control member increases as the diameter of the disk increases, and the plurality of drive pins function with respect to the disk having a larger diameter as the radius of the concentric circle in which they are provided increases. Preferably. Further, in the above structure, the control member has a substantially oval guide groove provided in a direction substantially orthogonal to the disc insertion direction, and the control groove is mounted on the base by an axis perpendicular to the guide groove and the base. Is preferably slidable in a predetermined direction and rotatably supported about the shaft. Further, in the above configuration, it is preferable that the movement amount of the outer peripheral portion when the control member rotates is substantially constant regardless of the diameter of the disc. Further, in the above structure, it is preferable that the disc clamp mechanism be operated by moving a predetermined amount of the engaging portion provided on the outer peripheral portion of the control member. Further, in the above configuration, the disc clamp mechanism includes a clamp operating member which is perpendicular to the base and slidable in the disc inserting direction, and the clamp operating member drives a disc driving roller. It is preferable that the gear has a rack for engaging with a gear driven by the motor, and the gear and the rack are engaged by being driven by a predetermined amount in the disc insertion direction by rotation of the control member. . Further, in the above configuration, at least the first shaft and the second shaft
It is preferable that a roller is rotatably fitted to one of the shafts.

[0010]

According to the disk loading mechanism of the present invention constructed as described above, the disk inserted on the base through the insertion slot contacts the first shaft of the first lever. First
Axis slides on the outer circumference of the disc as the disc is inserted. The first lever provided with the first shaft rotates in a predetermined direction (for example, the outer side direction of the base) around the rotation shaft as the first shaft slides. At this time, the first lever is rotated by a larger disc than a smaller disc. The movement amount (displacement amount) of the control member in a predetermined direction (for example, a direction substantially orthogonal to the disc insertion direction) also changes due to the difference in the rotation amount of the first lever. After the control member is moved, when the disc is further fed to the back of the base, the outer peripheral portion of the disc comes into contact with the second shaft of the second lever to rotate the second lever. When the disk reaches the position where the radial loading is completed, any one of the plurality of drive pins provided on the second lever (for example, on a concentric circle around the rotation axis of the second lever) causes the control member to move. The control member is pushed by making contact with the contact portion provided on the. As a result, the control member rotates about its axis of rotation. Since the position of the control member varies depending on the diameter of the disc used, each drive pin is provided at a different position corresponding to a plurality of types of discs having different diameters.
Therefore, regardless of the diameter of the disc, the completion of the disc loading operation for all the discs can be detected by the rotation of the control member.

Since the amount of displacement of the control member increases as the diameter of the disk increases, the plurality of drive pins correspondingly function with respect to the disk having the larger diameter as the radius of the concentric circle in which they are provided increases. By so setting, the structures of the control member and the second lever are simplified. Further, the control member is provided with a substantially oval guide groove provided in a direction substantially orthogonal to the disc insertion direction, and by engaging the guide groove and a shaft perpendicular to the base, a predetermined engagement structure is obtained. Since it can be slidable in the direction and can be rotated about the axis, the control member and its supporting structure can be simplified. Also, by setting the position of each drive pin on the concentric circle so that the movement amount of the outer peripheral portion when the control member rotates is substantially constant regardless of the diameter of the disc, various diameters corresponding to it can be set. The drive pins can push the control member at the positions where the different disks have been completely loaded in the radial direction. Further, by moving the engagement portion provided on the outer peripheral portion of the control member by a predetermined amount,
Since the disc clamp mechanism is configured to start the disc clamp operation, it is not necessary to use another clamp start drive source such as a plunger as in the conventional example. Further, the disc clamp mechanism is provided with a clamp operating member which is vertical to the base and slidable in the disc inserting direction, and the clamp operating member is driven by a motor for driving a disc driving roller. Has a rack for engaging with a gear, and is driven by a predetermined amount in the disc insertion direction by the rotation of the control member,
Since the gear and the rack are configured to engage with each other, the disk loading operation and the disk clamping operation can be shared by the same motor, and the mechanism can be simplified and the apparatus can be downsized. Further, by rotatably fitting the roller to at least one of the first shaft and the second shaft, when the outer peripheral portion of the disk abuts on the first shaft and / or the second shaft, the roller does not move. Since the disc rolls on the scoop outer periphery, the influence of the shape of the outer peripheral portion of the disc on the load resistance given to the first and / or second lever by the disc is small, and the outer peripheral portion of the disc is a disc having a large contact resistance. However, the rotational operation load of the first and / or second lever hardly increases, and the disc loading roller or the like can stably perform the disc loading and ejecting.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred first embodiment of the disk loading mechanism of the present invention will be described in detail with reference to FIGS. FIG. 1 is a plan view showing the configuration and operation of the disc loading mechanism of the first embodiment of the compact disc player when a 12 cm disc is used, and FIG. 2 is a side view thereof. FIG. 3 is a plan view showing the configuration and operation of the disc loading mechanism of the first embodiment when using an 8-cm disc. In each figure, 100 represents a 12 cm disc, and
101 represents an 8 cm disc.

1 and 3, the disk loading mechanism according to the first embodiment is a disk 100 or 1
01 is substantially parallel to the insertion direction X, and a pair of first rotatably supported about an axis 2b substantially perpendicular to the base 1.
Levers 21 and 22, and a substantially oval guide hole 3e that fits with the shaft 3c, are supported slidably in a direction Y substantially orthogonal to the disc insertion direction, and are rotatable about the shaft 3c. It has a supported control member 3, a second lever 4 that is rotatably supported about a shaft 4b that is substantially perpendicular to the base 1, and a substantially oval guide hole 5b that fits with the shaft 2b. A slider 5 slidably supported in a direction Y substantially orthogonal to the disc insertion direction, a spring 9 for biasing the slider 5 leftward in the figure, and a spring 1 for biasing the control member 3 leftward in the figure.
It has 0 and.

Near the tip portions of the pair of first levers 21 and 22, there are provided substantially cylindrical first shafts 2a, respectively, and when the disc 100 or 101 is inserted, the outer peripheral portion of the disc 100 or 101 is inserted. Abut. The engagement pin 2c provided on the first lever 22 on the right side in the inset view is engaged with the fork portion 5a provided on the slider 5. The second lever 4 has three substantially cylindrical shafts 4a, 4c and 4
d is provided, and the second shaft 4a contacts the outer peripheral portion of the disc 100 or 101 when the disc 100 or 101 is inserted. The control member 3 is provided with an abutting portion 3b for abutting the first drive pin 4c or the second drive pin 4d, respectively.
The control member 3 is rotated in the direction shown by the arrow 202 by contacting the drive pin 4c or the second drive pin 4d.

Further, the disc loading mechanism is
As shown in FIG. 2, in a plane substantially perpendicular to the base 1,
Slide left and right along the guide groove 6a to move the disk 10
Clamp operation member 6 for performing 0 or 101 clamp operation
A gear 7 that meshes with a rack 6b provided on the clamp operating member 6; and a spring 8 that is provided between the clamp operating member 6 and the base 1 and biases the clamp operating member 6 to the right in the figure. It has. The gear 7 is the same motor (not shown) as the motor that rotates the disc driving roller (e.g., the roller 12 of the conventional example shown in FIG. 10).
Thus, during loading, it rotates clockwise in the figure.
When the clamp operating member 6 is located at the right end, the rack 6
Some of the teeth of the rack 6b are lacking so that the gear b and the gear 7 do not mesh (6c portion). Further, the clamp operating member 6 is provided with an abutting portion 6d for abutting the engaging portion 3d provided on the control member 3. When the control member 3 rotates in the direction indicated by the arrow 202 in the figure, the engaging portion 3d pushes the 6d portion of the clamp operating member 6 leftward against the biasing force of the spring 8 to the right, and the clamp operating member 6d is pressed. The rack portion 6b of 6 meshes with the gear 7. As a result, the rotation of the gear 7 moves the clamp operating member 6 to the left, and starts the disc clamp operation.

The operation of the disk loading mechanism according to the first embodiment constructed as described above will be described with reference to FIGS. 1 and 2. First, when using the 12 cm disc 100, as shown in FIG. 1, when the disc 100 is inserted through the insertion opening 1a, the disc 100
The outer periphery of the first lever 21 and 22 provided on the first
The first levers 21 and 22 are rotated about the rotation shaft 2b in the directions indicated by arrows 200, respectively. A disc drive roller (not shown) is rotated by a switch (not shown) that is interlocked with the first lever 21 and / or 22 to load the disc 100. Since the engaging pin 2c provided on the first lever 22 on the right side in the figure is engaged with the fork portion 5a provided on the slider 5, the rotation of the first lever 22 causes the slider 5 to move into the guide hole. Slide to the right in the figure along 5b.
When the slider 5 slides to the right in the drawing, the contact portion 5c of the slider 5 pushes the contact portion 3a of the control member 3 in the direction of the drawing, and moves the control member 3 to the right of the drawing. When the disc 100 is further moved to the back, the outer peripheral portion of the disc 100 and the second shaft 4a of the second lever 4 come into contact with each other, and the rotating shaft 4b
The second lever 4 is rotated in the direction indicated by the arrow 201 with the center as the center. When the disk 100 reaches the position 100a where the radial feeding is almost completed, the first drive pin 4c provided on the second lever 4 causes the contact portion 3 of the control member 3 to move.
b, and the control member 3 is rotated about the shaft 3c by the arrow 20.
Rotate in the direction indicated by 2.

When the control member 3 rotates in the direction of the arrow 202, as shown in FIG. 2, the engaging portion 3d provided on the control member 3 causes the engaging portion 3d to oppose the biasing force of the spring 8 to the right. Then, the 6d portion of the clamp operating member 6 is pushed to the left, and the rack portion 6b of the clamp operating member 6 meshes with the gear 7. As a result, the rotation of the gear 7 moves the clamp operating member 6 to the left, and starts the disc clamp operation.

Next, the operation when the 8-cm disc 101 is used will be described with reference to FIG. FIG.
, The disk 10 inserted from the insertion opening 1a
The outer periphery of the first lever 21 contacts the first shaft 2a provided on the first levers 21 and 22, and
Rotates about axis 2b in the direction indicated by arrow 203. A disc driving roller (not shown) is rotated by a switch (not shown) which is interlocked with the first lever 21 and / or 22 to load the disc 101. Since the engaging pin 2c of the first lever 22 on the right side is engaged with the fork portion 5a of the slider 5, the first lever 22
The rotation causes the slider 5 to slide to the right side in the figure along the guide hole 5b. When the slider 5 slides to the right in the drawing, the contact portion 5c of the slider 5 pushes the contact portion 3a of the control member 3 in the direction of the drawing, and moves the control member 3 to the right of the drawing. The biasing force of the spring 9 extends to the first levers 21 and 22 via the slider 5. Therefore, when the disk 101 is further moved further inward, the diameter of the disk 101 is smaller, so that the first levers 21 and 22 rotate in the direction opposite to the direction indicated by the arrow 203 due to the biasing force of the spring 9, and the slider 5 also moves. Return to the left side of the figure. Further, the control member 3 also returns to the left in the drawing by the biasing force of the spring 10.

The outer peripheral portion of the disk 101 abuts on the second shaft 4a of the second lever 4 to move the second lever 4 into the rotary shaft 4a.
Rotate in the direction indicated by arrow 204 about b. Position 1 where the disk 101 is almost completely fed in the radial direction
When it reaches 01a, the position of the control member 3 is displaced to the left as compared with the case of the 12 cm disc shown in FIG. Therefore, the second drive pin 4d provided on the second lever 4 abuts on the abutting portion 3b of the control member 3 to move the control member 3 to the shaft 3c.
Is rotated in the direction indicated by the arrow 202. As a result, even if the rotation amount of the second lever 4 is smaller than that when the 12-cm disc is used, the control member 3 is moved to the arrow 202.
Can be rotated in the direction indicated by
The clamp operating member 6 can be operated in the same manner as when using the centimeter disk.

As described above, according to the first embodiment of the disc loading mechanism of the present invention, the clamp operating member can be used for a plurality of types of discs having different diameters without using another drive source such as a plunger. 6 racks 6b and gears 7
And can be engaged with each other to start the disc clamping operation. Further, since the first and second shafts that come into contact with the outer peripheral portion of the disc 100 or 101 are formed in a substantially cylindrical shape, they can slide smoothly on the outer peripheral portion of the disc 100 or 101, and An extreme increase in load does not occur between the outer peripheral portion and the first shaft 2a and / or the second shaft 4a. Therefore, the load on the disc drive roller does not increase extremely, and the load on the disc drive roller can be kept substantially constant without being affected by the outer peripheral surface of the disc. Therefore, it is possible to stably load and eject the disc.

Next, a second preferred embodiment of the disc loading mechanism of the present invention will be described in detail with reference to FIGS. 4 and 5. In FIG. 4, (a) is a side view of the first levers 21 and 22, and (b) is a side view of the second lever 4. FIG. 5 is a plan view showing the configuration and operation of the disc loading mechanism of the second embodiment when using a 12 cm disc. Since the members with the same numbers as in the first embodiment are substantially the same, the description thereof will be omitted.

In FIG. 4A, a first shaft 2a is provided near one end of each of the first levers 21 and 22, and a first roller is provided on the outer periphery of the first shaft 2a. 2e is rotatably fitted with a predetermined tolerance. A retaining ring 2f is attached to the open end of the first shaft 2a so that the first roller 2e does not fall off the first shaft 2a. Similarly, in FIG. 4B, a second shaft 4a is provided near one end of the second lever 4,
The second roller 4e is rotatably fitted to the outer peripheral portion of the second shaft 4a with a predetermined tolerance. A retaining ring 4f is attached to the open end of the second shaft 4a so that the second roller 4e does not fall off the second shaft 4a.

With respect to the disk loading mechanism according to the second embodiment having the first and second levers having the above construction,
The operation will be described with reference to FIG. As shown in FIG. 5, the disc 100 inserted from the disc insertion opening 1a.
The outer periphery of the first lever 21 and the second roller 22e provided on the first lever 2 and 22 is abutted, the first lever 2 to the rotation shaft 2b.
Is rotated in the direction indicated by arrow 200. At this time, even when the outer peripheral portion of the inserted disc 100 has a slight dent, or when the disc coating agent or the like adheres to the outer peripheral portion and the friction coefficient is high, the first roller 2
Since e can rotate with respect to the first shaft 2a,
The first roller 2e rolls on the outer peripheral portion of the disc 100, slipping occurs between the first shaft 2a and the first roller 2e, and between the outer peripheral portion of the disc 100 and the first shaft 2a, No extreme load increase occurs. Therefore, the disc 100 can be smoothly inserted.

A disc drive roller is rotated by a switch (not shown) interlocking with the first lever 21 and / or 22 to load the disc 100, but the first roller 2e moves on the outer peripheral portion of the disc 100. Since it is rotating, the load acting on the disc driving roller is small. Similarly, when the second roller 4e provided on the second lever 4 and the outer peripheral portion of the disc 100 contact each other, the second roller 4e can also rotate with respect to the second shaft 4a. The second roller 4e rolls on the outer peripheral portion of the disc 100, and the second shaft 4a and the second roller 4e
Slippage occurs between the outer periphery of the disc 100 and the second
An extreme increase in load does not occur between the shaft 4a and the shaft 4a. Therefore, the load on the disc drive roller does not increase extremely, and the load on the disc drive roller can be kept substantially constant without being affected by the outer peripheral surface of the disc. Therefore, it is possible to stably load and eject the disc.

[0025]

As described above, according to the disc loading mechanism of the present invention, the disc inserted on the base through the insertion port comes into contact with the first shaft of the first lever, so that the disc has a diameter equal to that of the disc. In response, the first lever rotates in a predetermined direction by a predetermined angle, the control member moves in a predetermined direction by a predetermined amount in accordance with the rotation angle of the first lever, and the outer peripheral portion of the disc moves to the second position.
When the disc reaches the position where it is almost loaded in the radial direction by contacting with the second shaft of the lever of the disc and rotating the second lever by a predetermined angle according to the diameter of the disc, the difference in the disc diameter is dealt with. One of the plurality of drive pins provided at a predetermined position on the second lever comes into contact with an abutment portion provided on the control member, and the control member rotates about its rotation axis. Therefore, regardless of the diameter of the disc, the completion of the disc loading operation for all the discs can be detected by the rotation of the control member.

Since the displacement amount of the control member increases as the diameter of the disk increases, the plurality of drive pins correspondingly function with respect to the disk having the larger diameter as the radius of the concentric circle in which they are provided increases. By so setting, the structures of the control member and the second lever are simplified. Further, the control member is provided with a substantially oval guide groove provided in a direction substantially orthogonal to the disc insertion direction, and by engaging the guide groove and a shaft perpendicular to the base, a predetermined engagement structure is obtained. Since it can be slidable in the direction and can be rotated about the axis, the control member and its supporting structure can be simplified. Also, by setting the position of each drive pin on the concentric circle so that the movement amount of the outer peripheral portion when the control member rotates is substantially constant regardless of the diameter of the disc, various diameters corresponding to it can be set. The drive pins can push the control member at the positions where the different disks have been completely loaded in the radial direction. Further, by moving the engagement portion provided on the outer peripheral portion of the control member by a predetermined amount,
Since the disc clamp mechanism is configured to start the disc clamp operation, it is not necessary to use another clamp start drive source such as a plunger as in the conventional example. Further, the disc clamp mechanism is provided with a clamp operating member which is vertical to the base and slidable in the disc inserting direction, and the clamp operating member is driven by a motor for driving a disc driving roller. Has a rack for engaging with a gear, and is driven by a predetermined amount in the disc insertion direction by the rotation of the control member,
Since the gear and the rack are configured to engage with each other, the disk loading operation and the disk clamping operation can be shared by the same motor, and the mechanism can be simplified and the apparatus can be downsized. Further, by rotatably fitting the roller to at least one of the first shaft and the second shaft, when the outer peripheral portion of the disk abuts on the first shaft and / or the second shaft, the roller does not move. Since the disk rolls on the outer circumference, the shape of the outer circumference of the disk has little influence on the load resistance given to the first and / or second lever by the disk, and the outer circumference of the disk has a large contact resistance. However, the rotational operation load of the first and / or second lever hardly increases, and the disc loading roller or the like can stably perform the disc loading and ejecting.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a first preferred embodiment of a disc loading mechanism of the present invention and an operation when a 12-cm compact disc is used.

2 is a side view of the first embodiment shown in FIG.

FIG. 3 is a plan view showing the operation of the compact disc player according to the first embodiment when using an 8-cm disc.

FIG. 4 is a side view showing a detailed configuration of first and second shafts in a second preferred embodiment of the disk loading mechanism of the present invention.

FIG. 5 is a plan view showing the configuration of a second preferred embodiment of the disc loading mechanism of the present invention and the operation when using a 12-cm compact disc.

FIG. 6 is a plan view showing the configuration of a conventional disc loading mechanism and the operation of a compact disc player when a 12-cm disc is used.

FIG. 7 is a side view of FIG.

FIG. 8 is a clamp operation mechanism portion of a conventional compact disc player.

FIG. 9 is a plan view showing an operation of a compact disc player in a conventional disc loading mechanism when using an 8-cm disc.

FIG. 10 is a side view of FIG.

[Explanation of symbols]

 1: Base 2a: First shaft 2e: Roller 3: Control member 3a: Contact part 3b: Contact part 3c: Shaft 3d: Engagement part 3e: Guide groove 4: Second lever 4a: Second Shaft 4b: Rotating shaft 4c: First drive pin 4d: Second drive pin 5: Slider 6: Plump operation member 7: Gear 8: Spring 9: Spring 10: Spring 21: First lever 22: First lever

Front page continuation (72) Inventor Yasuya Toyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] 1. A base placed substantially parallel to the disc insertion direction, and a base provided near the disc insertion opening of the base and rotatably supported about an axis perpendicular to the base. No. 1 lever and an end portion of the first lever on the side of the disc insertion opening, which comes into contact with the disc outer peripheral portion and slides on the disc outer peripheral portion to move the first lever in a predetermined direction. A first axis that is perpendicular to the base, and is rotatably supported about an axis that is perpendicular to the base, and is arranged rearward with respect to the first lever in the disc insertion direction. And a second lever provided in the vicinity of a rear end of the second lever in the disc insertion direction, abutting on the disc outer peripheral portion and sliding on the disc outer peripheral portion. Turn the lever of the Let a second axis perpendicular to said base, provided at different positions on the second lever, functions corresponding plurality kinds of disks having different diameters,
A plurality of drive pins perpendicular to the base, and supported rotatably around an axis perpendicular to the base and slidable in a predetermined direction on the base, directly with the first lever or Indirectly engaged, slides in the predetermined direction as the first lever rotates, and abuts on any of a plurality of drive pins provided on the second lever to rotate the control member 1 A disk loading mechanism having one contact portion and a control member that rotates in a predetermined direction by rotation of the second lever. 2. The control member slides in a direction substantially orthogonal to the disc insertion direction, the displacement amount is different with respect to the diameter of the disc, and the plurality of drive pins are the rotation shafts of the second lever. 2. The disc loading mechanism according to claim 1, wherein the disc loading mechanism is provided on concentric circles having different radii with respect to the center. 3. The displacement amount of the control member increases as the diameter of the disk increases, and the plurality of drive pins function with respect to the disk having a larger diameter as the radius of the concentric circle in which they are provided increases. Claim 2
The described disc loading mechanism. 4. The control member has a substantially oval guide groove provided in a direction substantially orthogonal to the disc insertion direction, and is mounted on the base by an axis perpendicular to the guide groove and the base. 4. The disk loading mechanism according to claim 1, which is supported so as to be slidable in a predetermined direction and rotatable about the shaft. 5. The disc loading mechanism according to claim 1, wherein the amount of movement of the outer peripheral portion when the control member rotates is substantially constant regardless of the diameter of the disc. 6. The disc loading mechanism according to claim 5, wherein the disc clamp mechanism is operated by moving a predetermined amount of an engaging portion provided on an outer peripheral portion of the control member. 7. The disc clamp mechanism comprises a clamp operating member which is perpendicular to the base and slidable in the disc inserting direction, and the clamp operating member drives a disc driving roller. 7. The gear has a rack for engaging with a gear driven by a motor, and the gear and the rack are engaged by being driven by a predetermined amount in the disc insertion direction by rotation of the control member. Disc loading mechanism. 8. The disk loading mechanism according to claim 1, wherein a roller is rotatably fitted to at least one of the first shaft and the second shaft.