JP2852987B2 - Drive switching mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive switching mechanism applicable to a multi-disc disk player capable of reproducing a plurality of CDs (compact disks) arranged side by side on a turntable in a desired program order.

[0002]

2. Description of the Related Art Conventionally, as a multi-type disk player, a turntable for mounting a CD is installed on a slide table in a casing, and a pickup, a disk support and members for driving them are assembled on the slide table side. The substrate is rotatably displaceable up and down by a hinge portion, and a free end of the substrate is linked to a rotating cam body provided on the slide table side, and the substrate is reproduced from a downward inclined posture by a cam action of the rotating body. There has been known a disc player configured to be displaced to a horizontal posture for supporting a CD on a turntable with a disc support and to be able to reproduce.

FIG. 8 shows a main part of a drive mechanism of the multi-type disc player. In FIG. 1, reference numeral 1 denotes a chassis supported on the slide table side, and 2 denotes a board supported on the chassis by a hinge portion 3 so as to be rotatable and displaceable. And the like are assembled.

The chassis 1 has three motors M ₁ , M ₂ ,
M ₃ is provided. Motor M ₁ is a loading motor, a pulley 6, a belt 7, a pulley 8, gear 9,
A slide system (not shown) that supports the chassis 1 is slid by a drive system including a gear 10, a pinion 11, and a rack 12. Motor M ₂ is a motor for the turntable, pulley 13, belt 14,
Pulley 15, pinion 16, turntable side gear 17
The turntable is rotated in a fixed direction by a drive system composed of: The motor M ₃ is a chucking motor for rotating and displacing the substrate 2 rotatably supported by the hinge 3, and includes a pulley 18, a belt 1
9, a pulley 20, a gear 21, a gear 22, a rotating cam body 23 integrated with the gear 22, and a pin 24 at the free end side of the substrate 2 and engaged with the spiral cam surface of the rotating cam body. The driving system rotates and displaces the substrate 2 from the downward inclined posture to a horizontal posture for reproduction.

[0005]

In the drive mechanism of the multi-type disc player, dedicated motors are used for loading, turntable, and chucking operations for each operation. There is a problem that the weight of the entire mechanism is increased and disadvantageous for a drop test or the like.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its main object to provide a drive switching mechanism capable of controlling the above-mentioned three drive systems with one motor.

[0007]

A drive switching mechanism according to the present invention comprises a motor capable of rotating forward and reverse, a pinion rotated by the motor, and a lever member meshed with the pinion and rotatably supported. An idler gear that is freely supported, and a lever that is installed in a rotation area of the lever member.
When the member hits, and the rotation range of the lever member
Control means for controlling the range of rotation of the lever member by moving in and out
And a lever portion provided in a rotation area of the idler gear.
When the material hits the hit, the idler gear meshes.
A first driven gear that engages, and the lever that is controlled by the control unit.
Second and third driven gears meshing at the time of controlling the rotation range of the member;
Switching the rotation direction of the motor and the control means
The first, second and third driven gears and the front
One of the motors is switched by meshing with the idler gear.
The main point is that three different operations are performed.

[0008]

According to the above arrangement, a plurality of drive systems can be selectively driven by one motor.

[0009]

Next, the present invention will be described in detail with reference to the drawings showing an embodiment of the present invention. Note that the same or similar members as those in FIG. 8 are denoted by the same reference numerals.

1 and 2, reference numeral 1 denotes a chassis, on which a motor M is fixed on the back side, and a pinion gear 26 is fixed on a motor rotating shaft 25 protruding on the front side.
An L-shaped lever member 27 is rotatably supported at the bent portion. Of the lever portions 27a and 27b protruding from the bent portion of the L-shaped lever member 27, a support shaft 27c is integrally formed on the distal end side of one of the lever portions 27a, and the upper and lower two-stage idler gear 28, 29 is rotatably supported by a spring 30 while being urged in the axial direction, and a gear 28 is meshed with the pinion gear 26. With this configuration, the two-stage idler gear 28,
29 follows the forward and reverse rotations of the motor M,
In addition, clockwise rotation and left rotation are possible.

At a predetermined portion of the chassis 1, a solenoid 3
1, one end of an arm 33 rotatably supported by a support shaft 32 is linked to the solenoid 31, and the other end of the arm 33 is a plate 3 slidably disposed on a chassis.
4 is linked. This plate 34 is a solenoid 3
1 slides through the arm 33 in the direction of the arrow. Reference numeral 35 denotes a spring for urging the plate 34 to a fixed position.

The three driven gears 36, 37, 3 are located in a rotation range in which the idler gears 28, 29 supported by the lever member 27 rotate around the rotation shaft 25 of the motor M.
8 are rotatably arranged. The first driven gear 36 is supported coaxially with the loading pulley 6 shown in FIG. 8, and the second driven gear 37 is supported coaxially with the turntable gear 16 shown in FIG. The third driven gear 38 is coaxially supported with a gear 39 on the rear side of the chassis 1, and the gear 39 is meshed with the gear 22 integrated with the rotary cam body 23 shown in FIG. FIG. 3 shows the rotary cam body 2.
3 shows a state where the gear 3 and the gear 22 are disassembled.

An idler gear 2 is provided on the chassis 1.
A stopper piece 40 is provided in a part of the rotation area of the lever portion 27a that supports 8, 29. Next, the operation and operation of the drive switching mechanism will be described.

FIGS. 1 and 4 show a state where the solenoid 31 is not operated. Here, in FIG.
When the motor M is rotated forward (to the right in the drawing) and the motor M is rotated forward, as shown in FIG. 5, the idler gear 28 rotates together with the lever member to the stopper portion piece 40, and the driven gear 3
6 meshes. At this time, the solenoid 31 is deactivated after operating for a certain period of time. In this state, if the motor M is continuously driven while rotating forward, the pulley 6, the belt 7, the pulley 8, the gear 9, the gear 10, the pinion 11 , the rack 12
Drive system operates, and the loading operation is performed. That is, the slide table supporting the chassis 1 is slid, and the disc can be replaced. At this time, the end of the loading open is detected by a limit switch (not shown) on the set side, and the motor M is stopped. Further, at this time, since the substrate 2 on which members such as the pickup 4 are mounted is loaded at the same time, it is possible to perform the loading while performing and the performance with the loading open.

Following the above, the motor M is reversed. At this time, since the solenoid 31 is deenergized, the plate 34 is positioned at the home position. The lever member 27 and the idler gears 28 and 29, which should follow the rotation of the motor M,
As shown in FIG. 5, the tip of the lever portion 27b is restricted by one shoulder portion 34a of the plate 34, so that the rotation (reverse rotation) is continued on the spot. As a result, the loading drive system described above is driven in the opposite direction, so that the slide table is slid in the opposite direction, and the loading is closed. At this time, the end of the loading close is detected by a limit switch (not shown) on the set side, and the motor M is stopped.

Next, in FIG. 4, when the solenoid 31 is operated, the motor M is reversed. At this time, since there is no restriction on the lever member 27, the lever member 27 can be rotated leftward (in the drawing) together with the idler gears 28 and 29, and as shown in FIG.
It rotates until it is restricted by another stopper piece 41 provided thereon, and at the same time, the idler gear 29 is driven by the driven gear 3.
8 meshes. In this state, the rotation (reverse rotation) of the motor M is transmitted to the rotary cam body 23 via the gears 39 and 22. As shown in FIG. 3, the rotary cam body 23 is formed as an up-down cam that returns to the uppermost position from the uppermost position to the lowermost position by one rotation.

The cam portion of the rotary cam body 23 has a structure shown in FIG.
As shown in FIG. 7, since the engagement pin 24 at the tip of the board 2 is engaged, when the rotating cam body 23 rotates by the reverse rotation of the motor M, the board 2 When the gear 22 makes a half turn around the hinge 3 (see FIG. 1) as a fulcrum, the chucking down (lowest order) is completed. At this time, the completion of chucking down is detected by a limit switch (not shown) for detecting the angular position of the gear 22, and the motor M is stopped. After this operation is completed, when the motor M is again rotated in the reverse direction, the gear 22 is rotated half a second time again, so that the substrate 2 completes chucking up (uppermost position). At this time, the gear 22
The completion of chucking is detected by the limit switch from the angular position of, and the motor M is stopped.

After the operation of the motor M in the reverse direction as described above,
When rotated in the forward direction, the lever member 27 rotates clockwise with the idler gears 28 and 29. At this time, the solenoid 31
Is inactive, so plate 34 is in place. Thereby, as shown in FIG. 4, the tip of the lever portion 27b is restricted by the shoulder 34b on the opposite side of the plate 34, and the idler gear 28 meshes with the driven gear 37. Thus, the turntable is rotated via the gears 16 and 17. The angular position of the gear 17 is detected by an optical sensor or the like, and when the designated position is detected, the motor M is stopped.

The forward and reverse rotations of the motor M, including the above-described operation, enable continuous performance such as chucking down, disc selection, and chucking up.

[0020]

According to the present invention, three motors used for loading, turntable, and chucking in the conventional multi-type disc player can be reduced by two. Accordingly, the transmission mechanism can be simplified, and the cost can be significantly reduced.
Further, by reducing the weight of two motors, damage in a drop test or the like can be reduced. In addition, the present invention
The present invention can be applied not only to the drive mechanism of the multi-type disc player but also to a switching mechanism of another drive mechanism.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a drive switching mechanism when the present invention is applied to a multi-type disc player, and showing a state at the time of a chucking operation of the player.

FIG. 2 is an enlarged sectional view of a main part of the mechanism.

FIG. 3 is an exploded perspective view of a rotary cam body.

FIG. 4 is a plan view of a drive switching mechanism when a player turns a turntable.

FIG. 5 is a plan view of a drive switching mechanism during a loading operation of the player.

FIG. 6 is a side view showing a linked state between the rotary cam body and the substrate at the time of chucking up.

FIG. 7 is a side view showing a linked state between the rotating cam body and the substrate at the time of chucking down.

FIG. 8 is a plan view of a drive switching mechanism in a conventional multi-type disc player.

[Explanation of symbols]

1 Chassis 2 substrate 3 hinge portion 4 pickup 5 disk support M _{1, M} 2, _{M 3} motor 6 pulley 7 belt 8 pulleys 9, 10 gear 11 pinion 12 rack 13 pulley 14 belt 15 pulley 16 pinion 17 gear 18 pulley 19 belt 20 Pulleys 21, 22 Gear 23 Rotating cam body 24 Engagement pin 25 Rotary shaft of motor M 26 Pinion gear 27 Lever member 27a, 27b Lever portion 27c Support shaft 28, 29 Idler gear 30 Spring 31 Solenoid 32 Support shaft 33 Arm 34 Plate 35 Spring 36 , 37, 38 Followed gear 40 Stopper piece 34a, 34b Shoulder 41 Stopper piece

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) G11B 25/04 101 G11B 17/22 G11B 17/30

Claims (1)

(57) [Claims] A motor capable of rotating forward and backward, a pinion rotated by the motor, an idler gear meshed with the pinion and rotatably supported by a rotatably supported lever member; Installed in the rotation area
The contact between the bar member and the rotation of the lever member
Control to control the rotation range of the lever member by entering and exiting the area
Means, and the lever provided in a rotation area of the idler gear.
-The idler gear when the member hits the hit
A first driven gear that meshes with
Second and third driven gears that mesh when controlling the rotation range of the bar member.
Switching the rotation direction of the motor and the control
The first, second, and third driven gears by control switching with means
And the idler gear is engaged.
A drive switching mechanism characterized in that the motor performs three different operations .