JP2002008289A - Recording medium reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost recording medium reproducing device capable of fixing a floating state by lowering a base chassis with a small torque and crushing an elastic member. SOLUTION: This device is provided with a main body 10 for housing and reproducing a recording medium 1, a base chassis 20 supported in a floating state by an elastic member 11 in the main body 10, and having a turntable 23 and a reproducing head mounted thereon, a cartridge holder 30 supported slidably by guiding grooves 24a and 24b provided in the chassis 20, and adopted to transfer a recording medium 1 to a reproducing/non-reproducing position, and a slider 27 engaged with the cartridge holder 30 and slid by the driving force of a motor 25 transmitted through a gear train 26. By providing the guiding grooves 24a and 24b for inclining and lowering the base chassis 20 so as to crush the elastic member 11 plural times during the transfer of the recording medium 1 to the non-reproducing position, the driving loads of the motor 25 and the gear train 26 are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium reproducing apparatus, and more particularly, to a cartridge for gripping a recording medium on a floating base chassis disposed in a main body and transferring the recording medium to a reproduction / non-reproduction position. The present invention relates to a recording medium reproducing device provided with a holder.

[0002]

2. Description of the Related Art Conventionally, a recording medium reproducing apparatus for reproducing a recording medium such as an MD or MO floats via an elastic member in order to absorb shocks such as vibrations in a main body.
A base chassis supported in a state is provided, and reproduction components such as a turntable and a reproduction head for reproducing a recording medium are mounted on the base chassis. As a result, it becomes possible for the reproducing component to read and reproduce information accurately from the recording medium by absorbing the impact by the elastic member.

In addition, the conventional recording medium reproducing apparatus includes a cartridge holder that separates a base chassis (turntable) from the recording medium and transfers the recording medium to a non-reproduction position when discharging the recording medium from the main body. With the operation of the cartridge holder, the floating state of the base chassis is fixed (locked) to enable a safe discharge operation. As a conventional technique for fixing the floating state when the recording medium is transferred to the non-reproduction position in this manner, for example,
It is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-103675.
FIG. 5 is a perspective view showing a conventional recording medium reproducing apparatus that fixes such a floating state. FIG.
6 is an operation explanatory diagram showing an operation of fixing the floating state by the recording medium reproducing device shown in FIG. 5, and FIG.
6A shows a state before fixing, FIG. 6B shows a state during fixing, and FIG. 6C shows a state after fixing.

The conventional recording medium reproducing apparatus shown in FIG.
The main body 10 forming the exterior of the car stereo and a plurality of (four in FIG. 5) elastic members 11 are supported in a floating state in the main body 10. Base chassis 40
A cartridge holder 30 which is slidably supported on both sides on the base chassis 40 and holds the recording medium (MD) 1 inserted into the main body 10 and moves up and down to transfer the recording medium (MD) to a reproduction / non-reproduction position. It has. Here, body 1
0 is a recording medium 1 (not shown) on a predetermined outer surface.
To form an insertion slot for inserting In the main body 10, a base chassis 40 and a cartridge holder 30 are arranged near the insertion opening and supported in a floating state.

The base chassis 40 is supported in the main body 10 via an elastic member 11 such as a damper, and is disposed in a state where the base chassis 40 is urged from an upper surface in the main body 10 to a predetermined position by a coil spring 12. Also, base chassis 4
At 0, a turntable 43, which is driven to rotate to reproduce the recording medium 1, is placed almost at the center. Also,
The base chassis 40 is formed integrally with a pair of wall surfaces 44 extending substantially parallel to the vertical direction on both sides of the turntable 43. The pair of wall surfaces 44 form a guide groove 44a cut out in an elongated hole shape so as to be symmetrical in the left-right direction shown in FIG. A motor 45 for applying a predetermined driving force to one side of the wall surface 44 is provided on the base chassis 40.
And a slider 47 slidably supported by the motor 45 via a plurality of gear trains 46 by gears.

[0006] The cartridge holder 30 includes the main body 1.
0, which is formed so as to cover and hold the outer periphery of the recording medium 1 inserted in
2 is formed so that the turntable 43 and the reproducing head arranged on the base chassis 40 operate through the opening 32. This cartridge holder 30
A plurality of recording media 1 are provided on both side surfaces with respect to the insertion direction (FIG.
In this case, four guide pins 34 are provided, and the guide pins 34 are slidably supported on the base chassis 40 by inserting the guide pins 34 into guide grooves 44 a of the base chassis 40. One side of the guide pin 34 is engaged with the slider 47 of the base chassis 40, and is formed so that the driving force of the motor 45 is transmitted via the slider 47.

When reproducing the recording medium 1 using the conventional recording medium reproducing apparatus having such a configuration, first, the user grips the recording medium 1 and, as shown in FIG.
Into the insertion slot (not shown). At this time, in the main body 10, the guide pin 34 of the cartridge holder 30 is pushed forward by the slider 47 as shown in FIG. 5 and is fixed to one end side along the guide groove 44 a of the base chassis 40. Further, the base chassis 40 is lowered while crushing (deforming) the elastic member 11 in the downward direction shown in FIG. 5 by the guide pin 34 moving to one end side of the guide groove 44a. As a result, the base chassis 40 is
It is fixed (locked) in a state where it is urged in the upward direction shown in FIG.

The recording medium 1 inserted in the main body 10
Are stored and held in the cartridge holder 30. At this time, in the main body 10, the cartridge holder 30
The detection means (not shown) senses that the recording medium 1 is held by the controller and drives the motor 45 on the base chassis 40. When the motor 45 rotates, the rotational force is transmitted to the gear train 46 on the base chassis 40 as shown in FIG. 5, and the slider 47 slides rearward as shown in FIG. I do. Thereby, in the main body 10, the base chassis 40 rises upward as shown in FIG. 5 by the elastic force of the elastic member 11 and the coil spring 12 and is supported in a floating state at a predetermined reproducing position, and the cartridge holder 30 The guide pin 34 descends along the guide groove 44a. Thus, the cartridge holder 30
By descending along the guide groove 44a, the held recording medium 1 is placed on the turntable 43 as shown in FIG. As a result, the recording medium 1 is driven to rotate by the turntable 43 in the main body 10 so that predetermined information can be reproduced by a reproducing head (not shown) such as an optical pickup.

On the other hand, when the recording medium 1 is ejected from the main body 10 after the end of the reproducing operation, the user operates a predetermined key such as an operation key (not shown) so that the motor shown in FIG. By rotating 45, the slider 47 is slid forward. As a result, the guide pins 34 protruding from both side surfaces of the cartridge holder 30 are pushed to one end side by the slider 47 and rise along the guide grooves 44a. The cartridge holder 30 is moved by the slider 47 into the guide groove 44a.
As a result, as shown in FIG. 6 (b), it comes into contact with the upper surface of the main body 10. Further, in the main body 10, the guide pin 34 is further pushed forward by the slider 47 and slides, so that the base chassis 40 is lowered downward along the guide groove 44 a below the cartridge holder 30.
As a result, the base chassis 40 descends while crushing the elastic member 11 along the guide groove 44a, as shown in FIG. 6C, to secure a sufficient space between the base member 40 and the cartridge holder 30, and Floating state can be fixed.

As described above, the conventional recording medium reproducing apparatus is
When the recording medium 1 is transported to the non-reproduction position, the cartridge holder 30 supported in a floating state in the main body 10 and the base chassis 40 are guided by the guide grooves 44a so that they are sufficiently separated from each other to transfer the recording medium 1 to the non-reproduction position. , And the floating state in the main body 10 is fixed by the operation of the cartridge holder 30 and the base chassis 40.

[0011]

However, in the conventional recording medium reproducing apparatus, as shown in FIG. 6, when the base chassis 40 is lowered to squeeze the elastic member 11, especially when the elastic member 11 is at a low temperature, When it becomes hard, the operating load applied to the motor 45 and the gear train 46 shown in FIG. 5 increases, and a large torque is required for the motor 45 and the gear train 46. Was. Further, in the conventional recording medium reproducing apparatus, as described above, when a predetermined torque is required for the gear train 46, there is a problem that the number of gears in the reduction gear train increases or the speed decreases. An object of the present invention is to provide a low-cost recording medium reproducing apparatus capable of solving such a problem and lowering a base chassis with a small torque to crush an elastic member to fix a floating state.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a main body for loading a recording medium contained in a cartridge to a predetermined reproduction position and reproducing the same, and an elastic member provided in the main body via an elastic member. A base chassis on which a turntable and a reproducing head mounted on a floating state and for reproducing a recording medium are mounted; and a predetermined guide groove is provided in the base chassis, and the base chassis is slidably supported by the guide groove and provided on the turntable. A cartridge holder that moves up and down to transfer the recording medium to a reproduction / non-reproduction position; and a driving unit that is mounted on the base chassis and slides the cartridge holder along the guide groove. When the cartridge holder is moved to the playback position, the cartridge holder and the base chassis are moved in the direction in which the cartridge holder and the base chassis are relatively separated. The floating position is fixed by lowering the base chassis so that the elastic member is crushed with the position being restricted, and the base chassis is inclined at this fixing and the elastic member is divided into multiple parts and lowered to intermittently crush and drive It is provided to reduce the driving load of the source.

Here, the cartridge holder is provided with a plurality of guide pins protruding on both sides in the direction of inserting the recording medium, and has a pair of wall surfaces extending parallel to the surface of the base chassis, and the guide pins are inserted into the wall surfaces. It is preferable to form a slot-shaped guide groove for guiding the slidably on the base chassis. Further, the guide groove is formed so as to guide and lower the guide pin so that the cartridge holder is tilted to the left or right or back and forth when the recording medium is transferred to the non-reproduction position, so that the elastic member is intermittently crushed. Is preferred. Further, the guide groove is formed to have a width larger than the diameter of the guide pin, and to make a slight rotational movement by the clearance between the width and the guide pin, so as to tilt left and right or back and forth to intermittently crush the elastic member. Is preferred. Further, it is preferable that the driving means is provided with a motor for applying a predetermined driving force and a slider which engages with and slides on the cartridge holder through a gear train of gears from the motor mounted on the base chassis. The recording medium is an MD containing an optical disk in a cartridge,
It is preferably a medium such as an MO, and the main body is preferably a main body of a car stereo, a personal computer, or the like that stores and plays back a recording medium.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a recording medium reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a recording medium reproducing apparatus according to the present invention. FIG. 2 is a side view as seen from the direction of arrow A shown in FIG. FIG. 3 is a side view as seen from the direction of arrow B shown in FIG. FIG.
FIG. 4 is an operation explanatory view showing an operation of fixing a floating state by the recording medium reproducing apparatus shown in FIG. 1;
4A shows a state before fixing, FIG. 4B shows a state during fixing, and FIG. 4C shows a state after fixing. Here, in the present embodiment, the base chassis 20 shown in FIG.
Except for the above, all the components are the same as those of the related art shown in FIG. 5, and the same components are denoted by the same reference numerals.

As shown in FIG. 1, an embodiment of a recording medium reproducing apparatus according to the present invention is adopted in a car stereo for reproducing MD as in the prior art shown in FIG.
A main body 10 forming an exterior of the car stereo;
The base chassis 20 is supported in a floating state by a plurality of (four in FIG. 1) elastic members 11 in the inside of the main body 10, and both sides are slidably supported on the base chassis 20 so as to be inside the main body 10. Inserted recording medium (MD) 1
And a cartridge holder 30 for transferring the cartridge to a reproduction and non-reproduction position by moving the cartridge holder up and down. Here, although not shown, the main body 10 has an insertion opening for inserting the recording medium 1 in a predetermined outer surface. And the main body 1
In the space 0, the base chassis 20 and the cartridge holder 30 are arranged near the insertion port and supported in a floating state.

The base chassis 20 is supported in the main body 10 via an elastic member 11 such as a damper, and is disposed in a state where the base chassis 20 is biased to a predetermined position by the coil spring 12 from the upper surface in the main body 10. Also, base chassis 2
At 0, a turntable 23, which is driven to rotate to reproduce the recording medium 1, is placed substantially at the center. Also,
In the base chassis 20, a pair of wall surfaces 24 extending substantially parallel to the vertical direction on both sides of the turntable 23 are integrally formed. On the base chassis 20, a motor 25 for applying a predetermined driving force to one side of the wall surface 24 and a slider 27 slidably supported by the motor 25 via a plurality of gear trains 26 by gears are mounted. are doing. Here, unlike the prior art shown in FIG. 5, the pair of wall surfaces 24 form guide grooves 24a and 24b cut out in a long hole shape so as to be asymmetric in the left-right direction. here,
Guide groove 24a formed on left wall surface 24 shown in FIG.
Is cut out on the wall surface 24 so as to be inclined at a predetermined angle, as shown in FIG. On the other hand, as shown in FIG. 3, the guide groove 24b formed on the right wall surface 24 shown in FIG.
The wall 24 is cut out so as to be inclined at a predetermined angle, bent at a predetermined lower end, and cut out so as to extend in parallel with the insertion direction with a width C shown in FIG.

Referring again to FIG. 1, the cartridge holder 30 is formed so as to cover and hold the outer periphery of the recording medium 1 inserted into the main body 10, as in the prior art shown in FIG. A turntable 2 in which an opening hole 32 opening to a predetermined size is formed and arranged on the base chassis 20
3 and a reproducing head (not shown) are formed so as to be operable through the opening 32. Further, the cartridge holder 30 is provided with a plurality of (four in FIG. 1) projecting guide pins 34 on both side surfaces in the insertion direction of the recording medium 1, and the guide pins 34 are provided in the guide grooves 24 a and 24 b of the base chassis 20. Into the base chassis 2
It is slidably supported on the zero. This guide pin 34
Is formed so that one side is engaged with the slider 27 of the base chassis 20, and the driving force of the motor 25 is transmitted through the slider 27.

When reproducing the recording medium 1 using the embodiment of the recording medium reproducing apparatus according to the present invention having such a configuration, first, the user grips the recording medium 1 and as shown in FIG. It is inserted into an insertion opening (not shown) of the main body 10.
At this time, in the main body 10, the guide pin 34 of the cartridge holder 30 is pushed forward by the slider 27 as shown in FIG. 1 and slides along the guide grooves 24 a and 24 b of the base chassis 20 and is fixed to one end. ing. In addition, the base chassis 20 includes the guide pins 34 in which the guide grooves 24a, 24
By moving to one end side of b, the elastic member 11 descends while crushing the elastic member 11 in the downward direction shown in FIG. Thereby, the base chassis 20 is fixed (locked) in a state of being urged in the upward direction shown in FIG. 1 by the elastic force of the elastic member 11 and the coil spring 12.

Then, the recording medium 1 inserted into the main body 10
Are stored and held in the cartridge holder 30. At this time, in the main body 10, the cartridge holder 30
The detection means (not shown) senses that the recording medium 1 is held by the controller and drives the motor 25 on the base chassis 20. When the motor 25 rotates, the rotational force is transmitted to the gear train 26 on the base chassis 20 as shown in FIG. 1, and the slider 27 slides rearward as shown in FIG. I do. Thereby, in the main body 10, the base chassis 20 rises upward as shown in FIG. 1 by the elastic force of the elastic member 11 and the coil spring 12 and is supported in a floating state at a predetermined reproduction position, and the guide of the cartridge holder 30 is formed. When the pin 34 is in the guide groove 24a, 24
descend along b. Thus, the cartridge holder 3
0 descends along the guide grooves 24a, 24b,
The held recording medium 1 is placed on the turntable 23 as shown in FIG. Thereby, the recording medium 1
Is rotated by a turntable 23 in the main body 10 so that predetermined information can be reproduced by a reproducing head (not shown) such as an optical pickup.

On the other hand, when the recording operation is finished and the recording medium 1 is ejected from the main body 10, the user operates a predetermined key such as an operation key (not shown) so that the motor shown in FIG. The rotation of the slider 25
Is slid forward. As a result, the cartridge holder 30 is configured such that the guide pins 34 projecting from both side surfaces
7 and pushed up along one of the guide grooves 24a and 24b. At this time, the cartridge holder 30 is
Since the guide grooves 24a and 24b shown in FIGS. 2 and 3 are formed in different shapes, unlike the related art shown in FIG.
The left and right guide pins 34 rise in a state of being inclined to one side.
That is, the guide pin 34 has one side of the guide groove 2 shown in FIG.
4a, the guide groove 2 shown in FIG.
In 4b, the cartridge holder 30 is moved in parallel in the insertion direction along the width C, and the rising timing is shifted by tilting the cartridge holder 30.

As a result, the cartridge holder 30 ascends along one of the guide grooves 24a and 24b with one side inclined, and comes into contact with the upper surface of the main body 10 as shown in FIG. 4B. In the main body 10, a slider 27 (see FIG. 1)
As a result, the guide pin 34 is further pushed forward and slides, so that one side of the base chassis 20 descends along the guide groove 24a. And the base chassis 20
The elastic member 11 is lowered while being crushed on one side, and a sufficient space between the elastic member 11 and the cartridge holder 30 is secured, and the floating state in the main body 10 is fixed. Thereafter, the cartridge holder 30 is mounted on the other guide pin 3.
4 rises along the guide groove 24b shown in FIG.
As shown in (c), they are arranged substantially in parallel with the upper surface inside the main body 10. Also, in the main body 10, the other side of the base chassis 20 descends while crushing the elastic member 11,
The space between the cartridge holder 30 and the cartridge holder 30 is sufficiently ensured, and the floating state in the main body 10 is fixed. As described above, in the embodiment of the recording medium reproducing apparatus according to the present invention, the plurality of elastic members 11 can be simultaneously moved by executing the vertical movement of the cartridge holder 30 and the base chassis 20 while tilting the left and right timings. By crushing in several times without crushing, the motor 25
And the driving load applied to the gear train 26 is reduced.

Although the embodiment of the recording medium reproducing apparatus according to the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention. . For example, in the embodiment, the guide groove 24
Although the lower end of b is bent to provide a portion extending in parallel with the insertion direction, the width of the guide groove 24 may be substantially larger than the diameter of the guide pin 34 without providing the parallel portion. Similar operations can be performed. That is, in this case, the guide pin 34 that contacts the slider 27 is
The guide pin 34 comes into contact with the guide groove 24 before the book guide pin 34, so that the cartridge holder 30 makes a slight rotational movement when viewed from above, and is located near the guide pin 34 that contacts the slider 27. The elastic member 11 acts so as to be crushed first. Further, the embodiment of the guide groove for tilting the cartridge holder to the left and right with respect to the insertion direction has been described. However, the present invention is not limited to this. May be reduced.

[0023]

As described above, according to the recording medium reproducing apparatus of the present invention, since the elastic member is crushed and lowered in a plurality of times, the operation load for deforming the elastic member is reduced, and the motor and the gear having a small torque are reduced. It can work with columns. Further, according to the recording medium reproducing apparatus of the present invention, since it can operate with a motor and a gear train having a small torque, it is possible to reduce the number of reduction gears and to improve the operation speed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a recording medium reproducing apparatus according to the present invention.

FIG. 2 is a side view as seen from the direction of arrow A shown in FIG. 1;

FIG. 3 is a side view as seen from the direction of arrow B shown in FIG. 1;

FIG. 4 is an operation explanatory view showing an operation of fixing a floating state by the recording medium reproducing device shown in FIG. 1;

FIG. 5 is a perspective view showing a conventional recording medium reproducing apparatus.

FIG. 6 is an operation explanatory view showing an operation of fixing a floating state by the recording medium reproducing device shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording medium 10 Main body 11 Elastic member 12 Coil spring 20 Base chassis 23 Turntable 24 Wall surface 24a, 24b Guide groove 25 Motor 26 Gear train 27 Slider 30 Cartridge holder 32 Opening hole 34 Guide pin

Continued on the front page (72) Inventor Joji Tomioka 1-14-6 Dogenzaka, Shibuya-ku, Tokyo Inside Kenwood Corporation (72) Inventor Hisanori 1-14-6 Dogenzaka, Shibuya-ku, Tokyo Inside Kenwood Corporation F Terms (reference) 5D038 AA03 EA13 EA21 EA22 5D046 AA19 BA12 CB02 CC02 FA01 FA13 HA10

Claims (6)

[Claims] 1. A main body for loading and reproducing a recording medium stored in a cartridge at a predetermined reproduction position, and floating within the main body via an elastic member.
A turntable for supporting the recording medium and a turntable for reproducing the recording medium and a base chassis on which a readhead is mounted; and a predetermined guide groove provided in the base chassis, slidably supported by the guide groove and provided on the turntable. A cartridge holder for moving the recording medium up and down to transfer the recording medium to a reproduction / non-reproduction position; and a driving unit mounted on the base chassis to slide the cartridge holder along the guide groove. Operates the cartridge holder and the base chassis in the main body in a direction in which the cartridge holder is relatively separated when the recording medium is transferred to the non-reproduction position, and the position of the cartridge holder is regulated in the main body and the base chassis is moved. Is fixed (locked) by lowering the elastic member so as to crush the elastic member. Recording medium reproducing apparatus characterized by providing to reduce the driving load of the driving source by lowering the base chassis is inclined so crush intermittently in a plurality of said resilient member. 2. The recording medium reproducing apparatus according to claim 1, wherein the cartridge holder has a plurality of guide pins protruding on both sides in a direction in which the recording medium is inserted, and extends in parallel with a surface of the base chassis. A pair of wall surfaces to be inserted, and the guide holes are formed in the wall surface so as to guide the insertion of the guide pins, so that the guide grooves are slidably supported on the base chassis. Media playback device. 3. The recording medium reproducing apparatus according to claim 2, wherein the guide groove is provided with a guide pin so as to tilt the cartridge holder left or right or back and forth when transferring the recording medium to a non-reproduction position. A recording medium reproducing apparatus characterized in that the elastic member is intermittently crushed by being guided and lowered. 4. The recording medium reproducing apparatus according to claim 2, wherein the guide groove is formed to have a width larger than a diameter of the guide pin, and a slight rotational movement is caused by a clearance between the width and the guide pin. A recording medium reproducing apparatus characterized in that the elastic member is intermittently crushed by inclining left and right or back and forth. 5. The recording medium reproducing apparatus according to claim 1, wherein said driving means is provided with a motor for applying a predetermined driving force, and said motor is slidably engaged with said cartridge holder via a gear train of gears. A recording medium reproducing apparatus, wherein a moving slider is mounted on the base chassis. 6. The recording medium reproducing apparatus according to claim 1, wherein the recording medium is a medium such as an MD or MO in which an optical disk is stored in a cartridge, and the main body stores and reproduces the recording medium. A recording medium reproducing apparatus, which is a main body of a car stereo, a personal computer, or the like.