JPH0611160U - Disc player - Google Patents

Abstract

(57) [Abstract] [Purpose] To increase the degree of freedom in designing the location of the detection sensor. [Structure] A support plate 50 for holding the posture of a disk D when clamped by a clamp mechanism 400.
The detection sensor P was attached to the No. 6 through the sensor attachment portion 507. Further, with respect to the support plate 506, the detection sensor P does not project to the lower surface side of the support plate 506. [Effect] Since the detection sensor P may be arranged on the lower surface side of the support plate 506 without protruding, the detection sensor P
The restrictions on the location of the are greatly relaxed, and the degree of freedom in design can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc player in which the restriction on the mounting position of a detection sensor for detecting the presence or absence of a CD to be reproduced and its size is relaxed.

[0002]

[Prior art]

 2. Description of the Related Art In recent years, multi-type CD players (hereinafter simply referred to as CD players) capable of continuously playing a plurality of CDs have become popular. The basic structures of car and home players are often similar.

As a major difference, when attention is paid to a car CD player, due to the special condition of use in a car, consideration is given to securing an installation space, humidity, vibration, dust, operability, and the like.

FIG. 1 and FIG. 2 show an example of a CD player for such a car. As shown in these figures, the CD player has a magazine loading mechanism 200 in which the magazine 100 is loaded, an extrusion mechanism 300 for selecting a predetermined tray from the magazine 100 and pushing it to the turntable side, and a CD from the pushed tray. A clamp mechanism 400 for clamping the turntable, a reproducing mechanism 500 for reading the information recorded on the clamped CD, and a power transmission system 600 for interlocking the movement between these mechanisms are provided.

Further, each mechanism is attached to a predetermined portion of the support frame 700. The support frame 700 is floatingly supported by the outer casing 99 via a damper 701 and a vibration-proof spring 702.

In the magazine 100, trays 101 are stored in multiple stages. A push-out window 102 is formed on the side surface of the magazine 100 in accordance with the number of trays 101 to be accommodated.

When the push-out lever 301 of the push-out mechanism 300 is pushed into any of the push-out windows 102, the tray 101 rotates about the rotary shaft 103 in the arrow direction.

On the side plate 703 of the support frame 700, the panel hooks 704 that support one end of the anti-vibration spring 702 are provided so as to project at an angle of approximately 45 ° to the horizontal direction.

The side plate 703 of the support frame 700 has a vertically elongated groove 705 formed therein. The spring 706 prevents the magazine holder 216 from vibrating in the directions of arrows a and b. A slide plate 220 is attached inside the side plate 703 of the support frame 700 so as to be movable in the directions of arrows a and b.

In the step groove 212 of the slide plate 220, a step portion 213 corresponding to the number of trays holding the CDs stored in the magazine 100 is provided.

On the slide plate 220, a position detection plate 230 having a slit corresponding to the picked-up position of the selected tray is provided in a protruding manner.

A gear portion 606 is formed on the slide plate 220. The gear portion 606 meshes with an end portion of a gear group 607 described later.

Engagement pins 215 that engage with the step grooves 212 via projecting pieces 214 are provided on both side surfaces of the magazine holder 216. On the upper surface of the magazine holder 216, a rotation member 240 having a magazine engagement portion 256, a switch engagement portion 254 and a gear portion 246 is arranged to be rotatable in the directions of arrows c and d via a shaft 241. It is installed.

A damper 247 is arranged near the gear portion 246 of the rotating member 240 to keep the rotating speed of the rotating member 240 rotated in the direction of arrow d by the biasing force of the spring 242 constant. .

In the vicinity of the magazine engaging portion 256 of the rotating member 240, a rotating plate 250 biased in the direction of arrow f by a spring 252 via a shaft 251 is rotatable in the directions of arrow e and f. It is arranged to be.

A substrate 630 mounted on the shaft via a screw is disposed above the rotary cam 610. A tray position detection switch 632 having a lever 633 for notifying the start time and end time of the tray 101 when the selected CD storage tray is moved to a predetermined position is attached to the substrate 630. A CD position detection switch 634 having a lever 635 for notifying the position of the CD is attached near the tray position detection switch 632.

A detection sensor P that detects the presence of the CD and the tray 101 when the tray 101 holding the CD is delivered to the turntable 501 side is provided near the other end of the CD pressing lever 403. There is.

A motor 502 having a turntable 501 is arranged. A stepping motor 504 is arranged near the motor 502. A guide rail 511 for guiding the pickup 510 is arranged at a position sandwiching the motor 502.

In the CD player having such a structure, when the selected disc D is clamped, the operation as shown in FIGS. 3 to 5 is performed.

That is, the motor 502 is attached to the chassis 505. A turntable 501 is rotatably attached below the motor 502. The above-mentioned detection sensor P is attached to the lower surface side of the chassis 505.

A support plate 506 for stabilizing the posture of the disk D is attached to the chassis 505 via a slide pin 506a so as to be movable back and forth. The structure and operation of such a support plate 506 is disclosed in Japanese Patent Application Laid-Open No. 61-230666.

When the selected disc D is clamped, the disc D housed in the tray 101 is pushed upward by the clamp mechanism 400 located below the turntable 501.

At this time, the support plate 506 is separated from the chassis 505 and is moving downward. As the clamp mechanism 400 is pushed up, the support plate 506 contacts the surface of the disc D, and prevents the posture of the disc D from being disturbed by external vibration or the like until the completion of clamping.

In this state, the support plate 506 moves upward in synchronization with the pushing operation of the clamp mechanism 400.

When the central portion of the disk D contacts the turntable 501 and the clamping operation by the clamping mechanism 400 is completed, the support plate 506 continues to move upward and retracts to a position approaching the back surface of the chassis 505. As a result, when the disc D rotates, the support plate 506 does not get in the way.

Further, in the clamping operation by the clamping mechanism 400, the presence or absence of the disc and the disc size are detected by the detection sensor P attached to the lower surface side of the chassis 505.

[0027]

[Problems to be solved by the device]

 As described above, in the above-mentioned conventional CD player, the reflection type is used as the detection sensor P for detecting the presence or absence of the disc D and the disc size.

This is because the number of parts involved in the detection of the disc D can be made as small as possible, and the adjustment of the detection position accuracy by the detection sensor P does not require strictness.

By the way, when such a reflection type detection sensor P is adopted, it is necessary to dispose the detection sensor P near the disk D surface at the time of clamping because of its function. Further, since the tray 101 containing the selected disk D from the magazine 100 rotates in a horizontal plane and passes below the turntable 501, the tray 101 is located at a position that does not hinder the rotation of the tray 101. It is also necessary to provide the detection sensor P.

As described above, there are many restrictions on the location where the detection sensor P is arranged, and the degree of freedom in design is reduced.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a disc player capable of increasing the degree of freedom in designing the location of the detection sensor.

[0032]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an auto-loading type disc player, a clamp means for holding a disc between a turntable and a clamp means which moves in the clamp direction by the clamp means, and which uses the clamp means. Support plate that supports the posture of the disc until the disc is clamped by the turntable, and a detection sensor that is provided on the support plate and that detects the presence and size of the disc to be clamped. It is characterized by having and.

[0033]

[Action]

 In the disc player of the present invention, in order to increase the degree of freedom in design, a detection sensor is provided on the support plate for supporting the posture of the disc until the disc is clamped by the clamp means. It is a thing.

With this, since the support plate comes into contact with the disc when the disc is clamped, the detection sensor approaches the disc, so that the presence or absence of the disc and the size can be reliably detected.

In addition, when the disc is transported to the turntable side and when the disc is rotated after being clamped, the support plate is retracted to a position apart from the disc, so that the detection sensor transports and rotates the disc. Does not interfere.

[0036]

【Example】

 Hereinafter, details of embodiments of the present invention will be described with reference to the drawings. In the drawings described below, parts common to those in FIGS. 3 to 5 are designated by the same reference numerals, and redundant description will be omitted.

6 to 8 show an embodiment of the disc player of the present invention. As shown in these figures, a motor 502 is attached to the chassis 505. A turntable 501 is rotatably attached below the motor 502.

A support plate 506 for stabilizing the posture of the disk D is attached to the chassis 505 via a slide pin 506a so as to be movable back and forth.

At the end of the support plate 506, a sensor mounting portion 507 that is folded back upward is provided. A detection sensor P for detecting the presence or absence of the disc D and the disc size is attached to the sensor mounting portion 507. In the mounted state of the detection sensor P, the detection sensor P is mounted so that the detection surface thereof is substantially flush with the lower surface of the support plate 506.

In the disc player having such a configuration, when the tray 101 accommodating the disc D selected from the magazine 100 is pushed out to the turntable 501 side, the support plate 506 approaches the back surface of the chassis 505. I am evacuating to. In this state, since the detection sensor P is attached to the sensor attachment portion 507 that is folded back upward, the detection sensor P is disposed at a position higher than the support plate 506. Therefore, the lower surface side of the support plate 506 has no protrusion. There is no state.

As a result, since it is easy to see that the detection sensor P is attached in the mounting state shown in FIG. 4 described above, there is no protrusion by the detection sensor P, so that the tray 101 can be rotated toward the turntable 501 side. Moreover, the tray 101 is not caught by the detection sensor P due to vibration or the like, and the tray 101 can be reliably rotated at one time.

When the tray 101 reaches a predetermined position below the turntable, the clamp mechanism 400 located below the turntable 501 pushes the disc D accommodated in the tray 101 upward.

At this time, the support plate 506 is separated from the chassis 505 and is moving downward. As the clamp mechanism 400 is pushed up, the support plate 506 contacts the surface of the disc D, and the posture of the disc D is maintained until the completion of clamping due to external vibration.

In this state, as described above, since there is no protrusion on the lower surface side of the support plate 506, the entire surface of the support plate 506 abuts the disk D in a stable state. Further, since there is no protrusion on the lower surface side of the support plate 506, the disk D surface is not scratched.

In this state, the support plate 506 moves upward in synchronization with the pushing operation of the clamp mechanism 400. When the center portion of the disk D contacts the turntable 501 and the clamping operation by the clamping mechanism 400 is completed, the support plate 506 continues to move upward and retracts to a position approaching the back surface of the chassis 505. As a result, the support plate 506 does not interfere with the rotation of the disk D.

Further, in the clamping operation by the clamping mechanism 400, the presence or absence of the disc and the disc size are detected by the detection sensor P attached to the lower surface side of the chassis 505.

As described above, in the present embodiment, the detection sensor P is attached to the support plate 506 for holding the attitude of the disc D during the clamping by the clamp mechanism 400 via the sensor attachment portion 507. Further, with respect to the support plate 506, the detection sensor P does not project to the lower surface side of the support plate 506.

Therefore, when the tray 101 containing the selected disk D is pushed out from the magazine 100 and rotated to the turntable 501 side, since there is no protrusion on the lower surface side of the support plate 506, vibration does not occur. As a result, the problem that the tray 101 is caught by the detection sensor P 1 is eliminated, and the clamping operation of the turntable 501 of the disc D can be performed reliably.

Further, since the detection sensor P is arranged on the lower surface side of the support plate 506 so as not to project, the original function of supporting the disk D by the support plate 506 is not hindered.

As a result, since the detection sensor P may be arranged on the lower surface side of the support plate 506 in a state that it does not project, the restriction on the arrangement position of the detection sensor P is greatly relaxed, and the degree of freedom in design is increased. To be

[0051]

[Effect of device]

 As described above, according to the disc player of the present invention, the detection sensor is provided on the support plate for supporting the posture of the disc until the disc is clamped by the clamp means by the clamp means. Since the detection sensor approaches the disc when the support plate comes into contact with the disc when the disc is clamped, it is possible to reliably detect the presence or absence of the disc and the size of the disc.

Further, when the disc is transported to the turntable side and when the disc is rotated after being clamped, the support plate is retracted to a position away from the disc, so that the detection sensor performs the disc transporting operation and the rotating operation. Does not interfere. As a result, the detection sensor may be arranged on the lower surface side of the support plate in a state that it does not project, and the restriction on the arrangement position of the detection sensor is greatly relaxed, so that the degree of freedom in design can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal configuration of a conventional CD player.

FIG. 2 is a perspective view showing the magazine loading mechanism of FIG.

FIG. 3 is a diagram for explaining a mounting location of the detection sensor of FIG.

FIG. 4 is a diagram for explaining a support state for a disc by the support plate of FIG.

5 is a diagram for explaining a support state for a disc by the support plate of FIG.

FIG. 6 is a view showing an embodiment of a disc player of the present invention.

FIG. 7 is a diagram for explaining a support state for a disc by the support plate of FIG.

FIG. 8 is a diagram for explaining a support state for a disc by the support plate of FIG.

[Explanation of symbols]

 501 turntable 502 motor 505 chassis 506a slide pin 506 support plate 507 sensor mounting part P detection sensor D disk

Front page continued (72) Kiyoto Kajiwara Kiyoto Kajihara 25-1 Nishimachi, Yamada, Kawagoe, Saitama Prefecture Pioneer Co., Ltd. Kawagoe Factory (72) Atsushi Togashi 25-1 Nishimachi, Yamada, Kawagoe, Saitama Prefecture Pioneer Kawagoe Factory Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. In an auto-loading type disc player, clamp means for holding the disc between the turntable and the turntable, and moving in the clamp direction by the clamp means, and the clamp means holding the disc on the turntable. Until that time, a disc is provided with a support plate that supports the posture of the disc, and a detection sensor that is provided on the support plate and that detects the presence and size of the disc to be clamped. Player.