JP2820821B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player used for a vehicle, for example, in which a pickup chassis is elastically supported by a housing, and more particularly to a disk capable of driving a clamp arm with high precision. Regarding the player.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing a schematic structure of a conventional on-vehicle optical disk player. An optical disk player 1 shown in FIG. 1 includes a housing 2 having an insertion hole 2a for an optical disk 4 formed on the front surface, and a pickup chassis 3 elastically supported by an elastic member such as a damper 9 in the housing 2. Have. A pair of take-in rollers 7 and 8 for taking the inserted optical disc 4 onto the pickup chassis 3 are provided on the back side of the insertion hole 2a.

A turntable 3b on which the inserted optical disk 4 is installed is provided substantially at the center of the upper surface of the pickup chassis 3, and a regulating pin member 3c protrudes from a side surface 3d. Arrows A1 and A2 are displayed on the inner wall of the housing 2 facing the side surface 3d (the optical disk 4).
The driving member 6 is slidably supported in the direction of insertion and ejection of the motor (not shown), and is appropriately slid by a motor (not shown). The driving member 6 has a notch 6a formed near the left end in the figure, and a pin member 6c protruding formed near the right end.

The notch 6a has a substantially raindrop shape as shown in FIG. 1, and has a restricting groove 6 on its A2 direction side into which the pin member 3c is inserted in parallel with the sliding direction.
b is formed. The function of the groove 6b is that the driving member 6 slides in the direction A1, and the pin member 3 is inserted into the groove 6b.
When c is inserted, the pickup chassis 3 and the housing 2 act so as to be in a locked state in which relative displacement does not occur in the vertical direction or the like in the drawing. Further, when the driving member 6 moves in the A1 direction and the groove 6b and the pin member 3c are fitted, the pickup chassis 3 is pushed in the same direction by the moving force of the driving member 6 in the A1 direction, and Pickup chassis 3 supported
Moves in the A1 direction. For this reason, a restriction member (not shown) is provided in the housing 2 for restricting the pickup chassis 3 from moving in the A1 direction when the groove 6b and the pin member 3c are fitted. in this way,
The lock state of the pickup chassis 3 is such that when the optical disc 4 is inserted or ejected from the insertion hole 2a, the optical disc 4 is normally guided and placed on a turntable 3b provided on the pickup chassis 3. In addition, this is for normally guiding the loaded optical disc 4 and ejecting it. Therefore, the locking operation of the pickup chassis 3 is performed when the optical disk 4 is inserted and ejected.

Upright pieces 3a, 3a extending upward are formed on both left and right sides of the turntable 3b. A clamp arm 5 is rotatably supported by a shaft provided on the upright pieces 3a, 3a. The clamp arm 5 is urged toward the pickup chassis 3 by a spring (not shown). A clamper 5 a is rotatably supported at the tip of the clamp arm 5. Clamp arm 5
Is lowered by the spring force, the optical disk 4 is held between the clamper 5a and the turntable 3b. The base of the clamp arm 5 is provided with a locking portion 5b which is bent downward in the figure, and a pin member 6 provided on the driving member 6 is provided at the lower edge of the locking portion 5b.
The inclined part 5c lifted by c is formed.

In the above configuration, when the driving member 6 is driven in the direction A1 by the power of the motor, the pin member 6c comes into contact with and slides on the inclined portion 5c of the locking portion 5b provided on the clamp arm 5. The moment generated at this time causes the clamp arm 5 to rotate upward and open, and the optical disc 4 enters the unclamped state. At the same time, the pin member 3c is inserted into the groove 6b of the notch 6a formed in the driving member 6.
Are moved relative to each other, the vertical movement of the pickup chassis 3 is regulated, and the movement of the pickup chassis 3 in the A1 direction is regulated by a regulating member (not shown). In the housing 2, the clamper 5 a is separated from the turntable 3 b and sent by the take-in rollers 7 and 8 in a state where the movement of the pickup chassis 3 supported by the damper 9 is restricted and locked in this way. Wait for the optical disk 4.

When the optical disk 4 is inserted into the housing 2, the driving member 6 is driven in the direction A2, the pin member 6c is separated from the inclined portion 5c of the locking portion 5b, and is clamped by the urging force of a spring (not shown). The arm 5 is lowered, and the optical disk 4 is clamped on the turntable 3b.
At the same time, the restricting groove 6b separates from the pin member 3c, and the restricting member that restricts the movement of the pickup chassis 3 in the direction A1 separates, so that the pickup chassis 3 is elastically supported by the damper 9, and A reproduction operation is performed.

[0008]

However, in the above configuration, in the unclamping operation of separating the clamper 5a from the turntable 3b, the driving member 6 is moved in the direction A1, and the pin member 6c provided on the driving member 6 is engaged. The clamp arm 5 is slid against the inclined portion 5c of the stop portion 5b, and the sliding force raises the clamp arm 5 against the urging force of the spring. That is, the linear moving force of the driving member 6 in the A1 direction is converted into the lifting force of the clamp arm 5 by the component force of the inclination angle of the inclined portion 5c. For this reason, the sliding friction force between the inclined portion 5c and the pin member 6c becomes extremely large due to the elastic force of the spring urging the clamp arm 5 in the downward direction, and the driving load when the driving member 6 is moved in the A1 direction. Becomes very large.

Further, when the clamp arm 5 is lifted by sliding between the pin member 6c and the inclined portion 5c, the entire pickup chassis 3 supported by the damper 9 tends to be lifted upward. Therefore, the pin member 3c, which tends to be lifted together with the pickup chassis 3 when the groove portion 6b is fitted with the pin member 3c substantially simultaneously with the clamping operation, slides between the groove portion 6b of the drive member 6 provided inside the housing 2. The dynamic frictional force becomes very large, and the driving load of the driving member 6 in the A1 direction further increases.

In the conventional example shown in FIG. 7, the clamp arm 5 is supported by the pickup chassis 3 and the inclined portion 5c is provided integrally with the clamp arm 5, and a driving member 6 for lifting the clamp arm 5 is provided. Are supported on the housing 2 side. Therefore, due to accumulated tolerances such as errors in the shape of the inclined portion 5c formed in the locking portion 5b, errors in the mounting position of the driving member 6, and errors in the position of the pin member 6c provided in the driving member 6, The lifting angle varies from product to product, and if this cumulative tolerance is large, the leading end of the optical disc 4 to be inserted may hit the clamper 5a or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical disk player capable of reducing a driving load acting on a driving system when a clamper is separated from a turntable and minimizing an angle error in opening and closing operations of a clamp arm. .

[0012]

According to a first aspect of the present invention, there is provided a pickup chassis elastically supported in a housing, and a pickup chassis rotatably supported by the pickup chassis. In a disk player provided with a clamp arm for holding a disk between the disk mounting portion provided on the pickup chassis, an arm opening / closing arm for moving the clamp arm in the clamp and unclamping directions by the rotation of the pickup chassis. A member is provided, and a drive member for restricting the pickup chassis from moving with respect to the housing by the operation thereof is provided on the housing side, and the drive member comes into contact with the arm opening / closing member and the arm A pressing portion for driving the opening / closing member is provided.

[0013]

In the above means, when inserting and ejecting a disk, the driving member provided on the housing is driven in one direction, and the pressing portion rotates the arm opening / closing member provided on the pickup chassis. The clamp arm also supported by the pickup chassis is driven in the unclamping direction by the turning force of the arm opening / closing member. In addition, by the operation of the driving member in the one direction, the restricting portion for restricting the pickup chassis is operated almost simultaneously with the unclamping operation, and the pickup chassis elastically supported in the housing does not move in the housing. Is regulated as follows. Since the clamp arm and the arm opening / closing member are provided on the same pickup chassis side, variation in the relative position between the clamp arm and the arm opening / closing member can be reduced, and thus the error in the opening angle of the clamp arm can be reduced. Further, for example, if the driving direction of the driving member is set to be horizontal with respect to the pickup chassis,
The lifting force can be prevented from acting on the pickup chassis by the driving force of the driving member, and the reaction force against the lifting force can be prevented from acting as a load on the driving member.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of an on-vehicle optical disc player as one embodiment, FIG. 2 is a partially enlarged view of FIG.
And FIG. 4 are explanatory views for explaining the disk unclamping operation, FIG. 5 is a plan view showing an example of a regulating mechanism for regulating the pickup chassis, and FIG. 6 is a partial side view showing another embodiment of the regulating mechanism. . In the optical disc player 10 shown in FIG. 1, a pickup chassis 3 is supported in a housing 2 via a plurality of dampers 16 (see FIG. 5). The damper 16 is an oil damper or an air damper. The damper 16 is interposed between the bottom surface of the pickup chassis 3 and the bottom surface of the housing 2, and the pickup chassis 3 is elastically supported inside the housing 2.

At the left end of the pickup chassis 3 in the figure, upright pieces 3a, 3a are formed, and these upright pieces 3a, 3a are formed.
a about the axis 3e provided on the
Is rotatably mounted. The clamper 5a is attached to the tip of the clamp arm 17. A shaft 12a is provided on a side surface 3d of the pickup chassis 3, and an arm opening / closing member 12 is rotatably attached to the shaft 12a. The arm opening / closing member 12 is a plate-like member having a substantially L-shape. The arm upper end 12b is provided with a cylindrical guide pin 12c, and the arm lower end 12d is provided with one end of a driving member 11 which will be described in detail later. A contact pin 12e having a cylindrical shape with which the portion contacts is provided. A coil spring 13 is hung between the lower end 12 d of the arm and the side surface of the pickup chassis 3.
Is always urged counterclockwise about the shaft 12a.

Arm upper end 12b of arm opening / closing member 12
The guide pin 12c provided on the pickup arm 3 is inserted into an opening / closing portion 14 formed on a side surface of the clamp arm 17 rotatably mounted on the pickup chassis 3. The opening / closing portion 14 is a plate-like member integrally bent from the clamp arm 17 and has a guide groove 15 for guiding the guide pin 12c. The guide groove 15 has an upper side 15a formed in a direction substantially perpendicular to the insertion and ejection directions A1 and A2 of the optical disk 4 in a state shown in FIG. 1, and a lower side 15b corresponds to FIGS.
In this state, the arm opening / closing member 12 is formed so as to substantially coincide with an arc locus having a radius R centered on the axis 12a of the arm opening / closing member 12. Therefore, when the guide pin 12c formed on the arm opening / closing member 12 is located on the upper side 15a, the rotation of the arm opening / closing member 12 causes the clamp arm 1 to rotate.
7 is rotated, and the guide pin 12c is
When it is located at position “b”, no turning power is given to the clamp arm 17 by the rotation of the arm opening / closing member 12.

As shown in FIG. 5, the driving member 11 has a cross section bent in a U-shape, and its bottom portion is provided with guide pins 21 and 21 provided on the bottom surface of the housing 2.
Are slidably supported in the A1 and A2 directions. A groove 11b extending in a direction perpendicular to the plane of the drawing is formed in the lower bent portion 11a of the drive member 11 in FIG. On the other hand, a drive cam 22 is provided on a side plate of the housing 2, and a drive pin 23 provided on the drive cam 22 is inserted into the groove 11b. From a power transmission mechanism (not shown) to the switching gear 24
When the drive cam 22 is rotated by approximately 180 degrees in the normal and reverse directions via the drive pin 23, the drive pin 11 drives the drive member 11 in the A1 or A2 direction. A pressing portion 11c is bent at a bent portion 11d above the driving member 11 in FIG. 5, that is, on an inner side of the housing 2, and the pressing portion 11c is provided at an arm lower end portion 12d of the arm opening / closing member 12. It faces the contact pin 12e from the right side in the figure.

Next, a regulating mechanism for locking the pickup chassis 3 provided inside the housing 2 will be described with reference to FIG. As shown in the drawing, a connecting pin 25 is provided on the right side of the bent bottom of the driving member 11 in the drawing, and a connecting link 26 provided rotatably with respect to a shaft 27 provided on the bottom surface of the housing 2 is provided. The rotation is driven by the connection pin 25.
The connection link 26 is provided with a pin 28,
Are engaged with the lock lever 29. Lock lever 2
Reference numeral 9 denotes a guide pin 31 provided on the bottom surface of the housing 2 so as to be movable in a B1-B2 direction along a substantially arc-shaped locus. In FIG. 5, when the driving member 11 is driven in the A1 direction, the lock lever 29 is driven in the B1 direction via the connection link 26, and when the driving member 11 is driven in the A2 direction, the lock lever 29 is driven in the B2 direction. Is done.

As shown in FIG. 5, a shaft 3 is provided on the bottom of the housing 2.
When the driving member 11 is driven in the direction A2, the lock member 33 is rotatably supported via
3 is driven counterclockwise, and the pin 33a at the tip of the lock member 33 is inserted into the groove 3f provided in the pickup chassis 3.
Hanged on. A lock arm 35 is rotatably supported on the bottom surface of the housing 2 via a shaft 34. The lock arm 35 is driven clockwise when the lock lever 29 is driven in the direction B2. The support piece 3g on the right side in the drawing of the pickup chassis 3 is held by the forked portion 35a at the tip. A lock member 37 is rotatably supported by a shaft 36 provided on the bottom surface of the housing 2, and when the lock lever 29 is driven in the direction B2, the lock member 37 is driven in a counterclockwise direction. At this time, the pin 37a at the tip of the lock member 37 is
In the groove 3h.

In FIG. 5, a lock slider 41 is provided on the upper side plate of the housing 2 in the drawing, and when the lock member 37 is driven counterclockwise, an arm 37b provided on the lock member 37 is used. The lock slider 41 is driven in the direction A2. At this time, the protrusion 41 a provided on the lock slider 37 is locked in the groove 3 i of the pickup chassis 3.

The operation of the embodiment apparatus having the above configuration will be described with reference to FIGS. In the state shown in FIG. 1, the driving member 11 moves in the direction A <b> 1 and separates from the arm opening / closing member 12, and the arm opening / closing member 12 is urged counterclockwise by the spring 13. The guide pin 12c provided on the arm opening / closing member 12 engages with the upper side 15a of the guide groove 15, and the counterclockwise urging force of the arm opening / closing member 12 causes the clamp arm 17 to rotate clockwise about the shaft 3e. A biasing moment is applied to the clamper 5 provided at the tip of the clamp arm 17.
The optical disk 4 is held on the turntable 3b by a. When the disc ejection mode is selected, a rotating force is applied to the switching gear 24 shown in FIG. 5 by a motor (not shown), and the take-in roller 7 rises while rotating clockwise in FIG. The optical disk 4 is pinched. At the timing before the optical disk is nipped by the rollers 7 and 8, the power of the switching gear 24 is applied to the drive cam 22, the drive cam 22 rotates substantially 180 degrees, and the drive pin 23 moves the drive member 11 in the A2 direction. Start to be driven.

As shown in FIG. 3, a pressing portion 11c provided on the driving member 11 moving in the direction A2 is provided with a contact pin 12e provided on an arm lower end portion 12d of the arm opening / closing member 12.
, The contact pin 12e is pressed in the A2 direction. Therefore, the arm opening / closing member 12 is rotated clockwise in the figure around the shaft 12a. The rotational force of the arm opening / closing member 12 is controlled by the guide pin 12 c and the upper side 15
The clamp arm 17 is rotated counterclockwise about the shaft 3e against the urging force of the spring 13 by being transmitted to the opening / closing section 14 by sliding with the a.

As described above, the clamp arm 17 is driven in the opening direction by the movement of the driving member 11 in the direction A2.
The moving force of the drive member 11 moving in the A2 direction only applies the same pressing force to the pickup chassis 3 in the A2 direction, and does not apply the upward lifting force to the pickup chassis 3 in the drawing. That is, the force itself for rotating the clamp arm 17 is merely generated as an internal force by the arm opening / closing member 12 and the opening / closing section 14 attached to the pickup chassis 3 side.

As shown in FIG. 3, the guide pin 12c of the arm opening / closing member 12 is connected to the upper side 15a of the guide groove 15.
When the clamp arm 17 is located at the boundary (a) between the clamp arm 17 and the lower side 15b, the opening angle of the clamp arm 17 is determined.
2c moves in the lower side 15b of the guide groove 15. Since the lower side 15b of the guide groove 15 is formed substantially on the circumference around the shaft 12a in the state of FIGS. 3 and 4, after the guide pin 12c moves to the lower side 15b (see FIG. 4), no turning power is given to the clamp arm 17 by the rotation of the arm opening / closing member 12. As described above, in the present embodiment, since the rotation angle of the clamp arm 17 is determined based on the relative positional relationship between the arm opening / closing member 12 and the clamp arm opening / closing section 14, the moving position of the driving member 11 and the pickup chassis A2 of the driving member 11 even if the relative positional relationship with the
The error of the final moving position in the direction is absorbed by the circular arc locus on the lower side 15b of the guide groove 15, so that the clamp arm 17 can always be rotated at a constant angle.

Immediately after the driving member 11 starts to be driven in the A2 direction, the lock member 33 shown in FIG. 5 is driven in the counterclockwise direction by the driving force of the driving member 11 in the A2 direction, and the pickup chassis is driven by the pin 33a. 3 is locked. The lock lever 29 is driven in the direction B2 by the power of the drive member 11 in the direction A2. The lock arm 35 is driven in the clockwise direction by the driving force of the lock lever 29, and the support piece 3 g of the pickup chassis 3 is clamped by the forked portion 35 a of the lock arm 35.
7, the pickup chassis 3 is locked by the pin 37a. Further, the lock slider 41 is driven in the direction A2, and the pickup chassis 3 is locked by the protrusion 41a.

Immediately after the driving member 11 starts to be driven in the A2 direction as described above, the pickup chassis 3 is completely locked in the A1-A2 direction and the vertical direction by the lock members 33, 37, the lock arm 35 and the lock slider 41. After that, the opening operation of the clamp arm 17 is performed. Therefore, when the pressing portion 11c of the driving member 11 presses the arm opening / closing member 12 in the direction A2, the pickup chassis 3 is not pushed out in the same direction. As shown in FIG. 4, when the clamp arm 17 rotates, the optical disc 4 unclamped by the clamper 5a is released.
Is discharged between the take-up rollers 7 and 8 to the outside of the housing by the rotation of the roller 8.

Next, when the optical disk 4 is inserted, the operation is the reverse of the above-described operation, and the optical disk 4 is fed into the housing by the rotation of the roller 8 in the counterclockwise direction. Is driven, and the driving member 11
And the pressing portion 11 c is separated from the arm opening / closing member 12. Therefore, the arm opening / closing member 12 is
As a result, the clamp arm 17 rotates clockwise, and the optical disc 4 is held between the clamper 5a and the turntable 3b. The movement of the driving member 11 in the direction A1 and the movement of the lock lever 29 in the direction B1 cause the lock members 33 and 37 and the lock arm 3 to move.
5. The lock of the pickup chassis 3 is released by the lock slider 41.

Next, FIG. 6 shows another embodiment for locking the pickup chassis 3. In this embodiment, a hole 51 and a lock groove 51a are formed in the driving member 11 having the pressing portion 11c, and the locking groove 51a is formed in the pin 42 provided in the pickup chassis 3 by the moving force of the driving member 11 in the A2 direction. Fit. A lock arm 45 that rotates about a shaft 44 is provided on a side plate of the housing 2.
Is provided. A pin 46 provided on the lock arm 45 is inserted into a guide groove 43 formed in the driving member 11. When the drive member 11 is driven in the direction A2, the lock arm 45 provided on the housing 2 side is driven clockwise by the guide groove 43, and the lock groove 4 at the distal end thereof is driven.
5 a is a pin 47 provided on the pickup chassis 3.
Fits. In this structure, the pressing portion 11 of the driving member 11
When c pushes the contact pin 12e of the arm opening / closing member 12 in the A2 direction, the pin 42 provided on the pickup chassis 3 fits into the lock groove 51a, thereby regulating the pickup chassis 3 in the vertical direction. The lock groove 45a is fitted to the pin 47, thereby regulating the pickup chassis 3 in the upper part of the drawing and in the A1-A2 direction.

[0029]

According to the present invention described in detail above, the arm opening / closing member provided on the pickup chassis drives the clamp arm similarly provided on the pickup chassis, so that the opening angle of the clamp arm is the same as that of the pickup. It is determined only by the assembly accuracy of the arm opening / closing member provided on the chassis and the clamp arm, so that the opening angle of the clamp arm can be set with high accuracy.

The arm release member is driven by the one-way operation of the drive member. If the direction in which the arm release member is pushed is set to, for example, a horizontal direction, the pickup chassis is not lifted by the power of the drive member. Therefore, the load acting on the driving member can be minimized.

[Brief description of the drawings]

FIG. 1 is a side view showing the configuration of an on-vehicle optical disc player as one embodiment.

FIG. 2 is a partially enlarged detailed view of the optical disc player shown in FIG.

FIG. 3 is an explanatory diagram showing an operation state of the optical disc player shown in FIG. 1;

FIG. 4 is an explanatory diagram showing an operation state of the optical disc player shown in FIG. 1;

FIG. 5 is a plan view showing a regulating mechanism for locking the pickup chassis.

FIG. 6 is an explanatory view showing another embodiment of the regulating mechanism.

FIG. 7 is a perspective view showing a schematic configuration of a conventional optical disc player.

[Explanation of symbols]

 Reference Signs List 3 pickup chassis 3b turntable 3c pin member 4 optical disk 5a clamper 11 drive member 11c pressing portion 12 arm opening / closing member 12c guide pin 13 spring 14 opening / closing portion 15 guide groove 17 clamp arm 33, 37 lock member 35 lock arm 41 lock slider

Claims (1)

(57) [Claims] A clamp arm elastically supported in a housing and a clamp arm rotatably supported by the pickup chassis to clamp a disk between the disk mounting portion provided on the pickup chassis. In the disk player provided with the arm, the pickup chassis is provided with an arm opening / closing member for moving the clamp arm in the clamp and unclamping directions by its rotation operation, and the housing side is provided with the pickup by the operation. A driving member for regulating the chassis so as not to move with respect to the housing is provided, and the driving member is provided with a pressing portion which contacts the arm opening / closing member and drives the arm opening / closing member. Disc player.