JP3264021B2 - Disc changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc changer capable of rotating three discs on a tray and sequentially reproducing the discs.

[0002]

2. Description of the Related Art In recent years, compact disks have become widespread, and there has been a great demand for disk changers.

Moreover, a method of rotating a disk on a tray and sequentially reproducing the disk has become popular because of its simple structure and easy operation.

An example of a rotary disk changer will be described below with reference to the drawings.

[0005] In FIGS. 12 and 13, reference numeral 1 denotes a tray base which horizontally moves from a position where a disk is loaded into a playable housing 26, and 2 denotes three disks provided on the tray base 1. Is a rotating tray in which the disc receiving portions 2a on which the tray can be placed are evenly arranged and formed. Reference numeral 3 denotes a disk reproducing device arranged at a predetermined position of the housing 26, and a turntable 4 driven by a motor (not shown);
An optical pick 5 for optically detecting information recorded on a disc is provided. As shown in FIG. 12, the width A of the tray base 1 is formed to be the same size (244.0 mm) as the size 4R which is four times the radius R of the disk, and the width B of the housing 26 is set to the right and left in the size C, respectively. It is formed so as to have a dimension (270.0 mm) which is increased only by the size of

FIG. 14 shows a back surface of the rotary tray 2.
A roller tray 9 having a rotary tray gear 6 integrally formed on the back surface thereof, and a rotary shaft 7 provided at the center of the rotary tray 2, is prevented from coming off by screws 8, and is supported by the tray base 1.
Thereby, it is rotatable on the tray base 1. On the back surface of the rotating tray 2, reflection plates 10 for detecting a rotation stop position are attached at four locations. The rotating tray gear 6 has a connecting gear 12 supported on the tray base 1 by a shaft 11.
Are always engaged.

In FIG. 12, reference numeral 13 denotes a rotation lock lever, which is shown in detail in FIG. 15. A spring 14 is supported on the tray base 1 by a shaft portion 13b so that one end 13a is engaged with a concave portion of the rotation tray 2. It is energized by. FIGS. 15B and 15C are side views of the tray base 1 when the tray base 1 is out of the housing 26.
3a is engaged with the concave portion of the rotating tray 2, and the rotating tray 2 does not rotate. FIG. 15C shows a state in which the tray base 1 enters the housing 26 and comes to the playing position, and is rotated by the fixing portion 20d of the mechanical base 20 and disengaged from the rotating tray 2. That is, the rotary tray 2 can be rotated only at the performance position.

In FIG. 12, reference numeral 15 denotes a roller which is fixed to the back side of the tray base 1 by a shaft support member 16 formed of a leaf spring. The roller 15 is provided at the opening 1 a of the tray base 1.
, The stop position of the rotating tray 2 is substantially fixed by three concave portions 2 b formed on the side surface of the rotating tray 2.

In FIG. 12, reference numeral 17 denotes a tray table.
The details are shown in FIG. The groove hooks 17a provided on the tray base 17 are engaged with the groove hooks on the tray base 1, and the tray base 1 is slidable on the tray base 17. , A speed increasing gear 18 is supported by a shaft 19, and the speed increasing gear 18 meshes with a rack portion 1b on the back surface of the tray base 1 and a rack portion 20a of the mechanical base 20 (FIGS. 17 and 18). reference).

Reference numeral 21 denotes a lock gear, which is rotatably fixed to the back surface of the tray table 17 and is urged inward by a spring 22. One side edge 17b of the tray base 17 is the mechanical base 2
The tray base 17 is slidable on the mechanical base 20 by engaging with the groove catching portion 20b of the zero.

FIG. 17 is a cross-sectional view as viewed from the front, showing a rotating tray 2, a tray base 1, a tray base 17, and a connecting gear 1.
2, the relationship between the speed increasing gear 18 and the mechanical base 20 is shown. The tray 17 has a groove 17c through which the coupling gear 12 passes, and a hole 17
d, and can be engaged with the gear portion 41b of the gear 41 of the mechanical base 20, which will be described later, with the coupling gear 12.

The operation of the above-configured tray will be described with reference to FIGS.
FIG. 18 is a cross-sectional view from the side, FIG. 18a shows a playing position, and FIGS. 18b and c show mounting positions. Due to the speed increasing gear 18, the movement amount L of the tray base 1 is twice as large as the movement amount L / 2 of the tray base 17. FIG. 19 is a plan view, and FIG.
19a shows the playing position, FIG. 19b shows the tray ejection and disc loading position in the playing state, and FIG. 19c shows the all tray ejection and disc loading position. Eject tray during performance (Fig. 19b)
Means that the tray base 1 moves by an amount of movement M by which two disc receiving portions other than the disc being played go out of the housing 26. In the tray ejection in the non-playing state (FIG. 19 c), the tray base 1 moves by a moving amount N in which all three disks come out of the housing 26. At that time, the tray table 17 may be moved by half the moving amount of M / 2 and N / 2, respectively.

Next, returning to FIG. 13, the components mounted on the mechanical base 20 will be described. FIG. 20 shows a plan view of only the mechanical base 20 and also shows the positional relationship. The slide plate 23 and the slide plate 24 are
Is guided by the groove 20c, and slides in the horizontal direction. The lever 25 is rotatably supported on the mechanical base 20 by a shaft portion 25c, and one end 25a is engaged with the hole 23a of the slide plate 23,
The other end 25b is engaged with a hole 24a of the slide plate 24. Therefore, the sliding directions of the slide plate 23 and the slide plate 24 are opposite. 21a, 21b and 21c show slide plates 23 and 2 respectively.
4 and 4 show side views of the disc reproducing apparatus 3 and the relationship between them. Slide plate 23,
Cam portions 23b and 24b are provided on the inner vertical side surface of the 24 so as to engage with the convex portions 3a and 3b of the reproducing apparatus 3. When the slide plate 24 is slid in the depth direction by the cam portions 23b and 24b, the slide plate 23 slides forward, and the reproducing device 3 rises up to enter a disk playing state. FIG. 22 shows a plan view of the apparatus, in which FIG. 22a shows a playing state and FIG. 22b shows a non-playing state.

Next, the rotating parts will be described with reference to FIG. 13, FIG. 20 and FIG. The rotating parts have meshing or transmitting relationships in the cross-sectional views shown in FIGS. 23a, 23b and 23c.

Rotating components are rotatably fixed to the mechanical base 20, respectively. A motor pulley 31 is pressed into the shaft of the motor 30, and its rotation is transmitted to a pulley gear 33 by a belt 32, and the rotation of the pulley gear 33 is transmitted to a gear 34. Here, the cam gear 36 having the missing teeth is in a meshing position with the gear 34, and the lever 3
7 is locked at one end 37a. Lever 37 is spring 3
8, the other end 37b is engaged with the movable piece 40 of the electromagnet 39. The lever 35 is rotatable around a gear 35 c concentric with the gear 34, and a convex portion 35 a at one end is engaged with the cam portion of the cam gear 36. The lever 35 swings by the cam portion.

The cam operation will be described in more detail with reference to FIGS. First, FIG.
a is a stop position of the cam gear 36 at which the gear 34a faces, and the concave portion 36b of the cam gear 36 and the convex portion 37 of the lever 37
a is engaged. In this state, when the electromagnet 39 is energized and the movable piece 40 is attracted, the lever 37 is turned against the spring 38.
Rotates clockwise. Then, as shown in FIG. 24B, the engagement of the engagement portion 36b of the cam gear 36 is released, and the gear 34a and the teeth 36c of the cam gear 36 mesh with each other. The cam gear 36 rotates clockwise to the next missing tooth portion via FIG. 24c and stops again in the state of FIG. 24a. Next, in FIG.
6 is seen through the lower surface to show the relationship with the lever 35. The convex portion 35a of the lever 35 is engaged with the groove cam portion 36d formed on the lower surface. The lever 35 is configured to be biased to a neutral position by a spring 42 and to be loaded in a swinging direction.
FIG. 25A corresponds to the state of FIG. 24A, in which the toothless portion 36a is stopped facing the gear 34. In this case, the projection 35
When a is shifted to the far right, the lever 35 is urged clockwise by the neutral spring 42 and fixed. Then, when the electromagnet 39 is energized, a state corresponding to the state of FIG. 24C is shown in FIG. 25B, and the lever 35 rotates clockwise about the shaft hole 35c. FIG. 25C shows a state in which the lever 35 is biased counterclockwise by the neutral spring 42 and fixed when the projection 35a is shifted to the leftmost position in a state where the lever 35 is stopped at the next toothless portion. Hereinafter, each time the electromagnet 39 is energized, the lever 35 swings between two positions. Gear 3 in two swing positions
4 is transmitted to another path.

FIG. 26 shows two positions of the lever 35.
A gear 41 is supported on a shaft 35b at the other end of the lever 35,
The rotational force of the gear 34 is received. When the lever 35 swings to one side (FIG. 15A), the teeth 41a of the gear 41 are brought into a meshing position with the teeth 45a of the drive gear 45, and when the lever 35 swings to the other side (FIG. 26B), The teeth 41b are engaged with the coupling gear 12 at the playing position of the tray base 1 (not engaged at the mounting position). Cam gear 36
The gear 41 also rotates clockwise during the switching (for a moment) because it does not always switch unless it rotates clockwise.
However, once the cam gear 36 is fixed, the motor can rotate in either direction.

Returning to FIG. 13, FIG. 20, and FIG. 23, the drive gear 45 and the gears 43, 44 are supported by the mechanical base 24 and are at meshing positions. The gear 44 is secured by the fixed plate 29. Although the gears 44 and 43 are always in the meshing position, the drive gear 45 has missing teeth, and there are times when the drive gear 45 and the gear 43 mesh and when the drive gear 45 and the gear 44 mesh. A cam portion 45b is provided on the upper surface of the drive gear 45, and one end 24c of the slide plate 24 is engaged with the cam groove portion 45b. Therefore, when the drive gear 45 rotates, the slide plates 24 and 23 slide and the reproducing device 3
Move up and down (FIG. 22).

FIGS. 27 and 28 show the operation of the drive gear 45. FIG. FIG. 27a corresponds to FIG. 22a and shows a playing state. The driving gear 45 has the same tooth shape as the tooth portion 45a that meshes with the gear 41, and the tooth portion 45c having a different diameter from the tooth portion 45c having a different height and number of teeth.
There is d. FIGS. 27B and 27C are shown without 45a for simplicity. When the drive gear 45 is rotated counterclockwise from FIG. 27a, it becomes FIG. 27b, the meshing of the lower gear 43a of the gear 43 starts from the tooth portion 45d, and the gear 43 rotates clockwise. Upper gear 43b to lower gear 4 of gear 44
4a, and the upper gear 44b rotates counterclockwise. When the gear 44 rotates counterclockwise, the tray base 17 comes out. As will be described later in detail, the cam groove 45b is concentric and the reproducing device 3 maintains the playing state until FIG. 27c in which the tray base 17 is extended. Also, the drive gear 45 is rotated so that the amount of movement of the tray base 17 at this time becomes M / 2 in FIG. 19B. If the drive gear 45 is rotated clockwise from the state of FIG. 27, the process returns to FIG. 27A. . Further rotation in the clockwise direction moves the slide plate 24 to a non-playing state shown in FIG. 28a (corresponding to FIG. 22b).

When the drive gear 45 is further rotated clockwise from the state shown in FIG. 28A, the state shown in FIG.
5c begins to mesh with the lower gear 44a of the gear 44, and the gear 44 rotates counterclockwise. When the gear 44 rotates counterclockwise, the tray base 17 comes out via the upper gear 44b. FIG. 17c showing a state in which the tray base 17 comes out as will be described later.
Up to this point, the cam groove 45b is concentric and the reproducing device 3 keeps the non-playing state. The amount of movement of the tray 17 at this time is shown in FIG.
The drive gear 45 is rotated so as to be N / 2 of 9c, and the gear 44 is rotated. When the drive gear 45 is rotated clockwise, the flow returns to the original state shown in FIG. 17A.

FIG. 29 shows an operation state for the tray base 17. The upper gear 44b of the gear 44 is the tray base 17
18a is in the meshing position with the rack portion 17b of the lock gear 21 and the rack portion of the lock gear 21. In FIG. 18a, when the tray base 17 is fully extended, when the gear 44b is rotated clockwise from this position, the tray base 17 is pulled in by the rack portion 17b. FIG.
b, the wall portion 21c of the lock gear 21 comes into contact with the fixing plate 29 and starts rotating clockwise. When the lock gear 21 reaches the position shown in FIG. 29c, the linear rack portion 21a of the lock gear 21 meshes with the gear 44b. 29d, the regulation of the fixing plate 29 is removed, and the tooth portion 21b of the lock gear 21 is removed.
And the gear 44b mesh with each other, and the lock gear 21 rotates counterclockwise to lock the gear 44 (FIG. 29e). In this rotation locked state, the tray base 17 is in the storage completed state in which the tray base 17 does not move, and the tray base 17 does not come forward because the lock gear 21 is locked by the gear 44b. This state is a state in which the gear 44 does not rotate, and is a playing state and a non-playing state between FIGS. 27b to 27a, 28a, and 28b. From the state of FIG.
29e is rotated counterclockwise, from FIG. 29e to FIG.
Then, the tray table 17 comes out in the reverse state.

In FIG. 13, reference numeral 46 denotes a clamper which has a magnet 49 incorporated in a fixed plate 48. The assembled product is held by a clamp plate 47, and when the reproducing device 3 is raised, a disk is sandwiched between the turntables 4 by the attraction of a magnet. Here, the clamp plate 47 is fixed to the mechanical base 20 with screws.

As shown in FIGS. 13 and 23, the gear 33 is press-fitted with a count ring 50 so as to rotate integrally. The counting ring 50 has a slit portion 50a, which transmits and blocks light from the light receiving / emitting element 51, thereby electrically outputting the number of rotations of the motor.
The switch 52 shown in FIG. 13 is engaged with the lower surface of the drive gear 45, 52a is the raised position of the reproducing apparatus 3 at the position where the tray base 1 is inserted (FIG. 16a state), and 52b is the lowered position (FIG. The rotation position of the drive gear 45 corresponding to the state 28a) is detected. The switch 53 is engaged with the lower surface of the tray base 1 to detect a mounting position (53a in FIG. 19B, 53b in FIG. 19C). Numeral 54 denotes a light emitting / receiving element for detecting the rotation stop position of the rotary tray 2, and a mechanical base such that the tray base 1 enters the playing position and faces the reflector 10 attached to the lower surface of the rotary tray 2. It is fixed to the table 20 side.

FIG. 30 shows the relationship between the control circuit and the respective input devices and output devices. As input devices, light emitting / receiving elements 51 and 54 and position detecting switches 51a, b and 53 are provided.
a, b, a motor 30 and an electromagnet 39 are shown as output devices.

FIG. 31 shows the outputs of the light receiving / emitting elements 51 and 54. The output of the light emitting / receiving element 54 corresponds to the output crossing the dashed line shown in FIG. 14, and the outputs (B) corresponding to the three performance stop positions and the stop position rotated by 60 °, and the location between them are detected (A). Outputs with different numbers of pulses are generated. The light emitting / receiving element 51 outputs a constant pulse during the movement. By the above-described pulse output, the motor 30 can be rotated to the desired stop position, and the speed can be reduced by the pulse detected by the light emitting / receiving element 51 just before the stop position, and the motor 30 can be stopped reliably.

A series of operations of the disk changer configured as described above will be described below.

First, during the performance, the state shown in FIG. 22A is reached, the disk reproducing device 3 is raised, the tray base 1, the rotating tray 2
Is the state of FIG. 19a. The cam gear 36 is shown in FIG.
a, FIG. 25a, in which the rotational force is connected to the drive gear 45 as in FIG. 26a, but the motor 30 is not energized and does not rotate.

Here, when exchanging the disk by taking out the tray base 1 during the performance, power is supplied to the motor 30 from the control circuit by the operation button. Then, the drive gear 45 rotates counterclockwise from the state of FIG. 27b to the state of c, the gear 44 rotates counterclockwise, and the tray base 1 is discharged. This state is shown in FIG. 19B, and the disk can be mounted only on the two disk receiving portions 2a of the rotary tray 2 other than during the performance. When the operation button is set to the performance state, the motor 30 is reversed and returns to the state of FIG. 19A. In the non-playing state, the driving cam 45 rotates clockwise and moves from FIG. 27A to FIG. 28A (FIGS. 22A to 22B).
), And the playback device 3 descends. The rotating tray 2 can rotate only at this lowered position.

Therefore, when changing the performance disk using the operation buttons, first, the electromagnet 39 is energized to connect the gear 41 to the connecting gear 12 (see FIGS. 24 to 26b). When the cam gear 36 is switched, the rotating tray 2 selects a desired disk in the shortest rotating direction (FIG. 3).
1 disk position detection). When the disk is selected, the gear 41 is connected to the drive gear 45 by energizing the electromagnet 39 again (FIG. 26a). At this time, the gear 41 rotates clockwise, and the drive gear 45 rotates counterclockwise. When the drive gear 45 rotates counterclockwise, the routine shifts from FIG. 28A to FIG.

Next, when exchanging the disk by taking out the tray base 1 from the non-playing state (FIG. 29a), first, the electromagnet 39 is energized to connect the gear 41 to the connecting gear 12. Then, the rotating tray 2 is rotated by 60 degrees from the playing position as shown in FIG. 19C, and the gear 41 is connected to the driving gear 45 by energizing the electromagnet 39 again, and the driving gear 45 is turned clockwise from the state of FIG. As a result, the gear 44 rotates counterclockwise, and the tray base 1 is discharged. This state is shown in FIG. 19C, and all the disk receiving portions 2a can be mounted. If all the discs can be mounted, it is not necessary to turn the rotary tray 2 with the tray base 1 protruding (the rotation lock lever 13 also prevents the rotation).

Here, when the tray is rotated by 60 degrees, the tray base 1
The outer circumference of the disc can be received by the outer wall 1b of
Also, as shown in FIG. 19c, the disc number can be discriminated by engraving the disc number 1c on the tray base 1 at a location visible from the opening of the rotating tray 2. When the operation button is set to the playing state, the motor 30 is reversed and returns to the state of FIG. 19A.

[0032]

[Problems to be solved by the invention]

The conventional one has the following problems. That is, (1) the tray base horizontally moved into the housing, when the tray base is stored in the housing, the tray base regulates the pushing direction between the lock gear and the gear provided on the tray base. Conversely, in the storage direction, the restriction is made between the speed increasing gear and the standing wall of the mechanical base. However, with respect to the tray base, the position is determined only by the meshing of the gears provided on the tray base and the teeth of the rack provided on the tray base,
The stop position of the tray base varies from the tray base due to the inclination of the speed increasing gear shaft and the backlash between the gear speed increasing gear and the rack teeth. For this reason, when playing a disc placed on a rotating tray provided on a tray base, the position of the disc may be significantly shifted, and the turntable of the playback device can skillfully chuck the disc. A problem that playback cannot be performed.

(2) In order for the playback device to play and play the disc placed on the rotating tray, the position where the rotating tray rotates and stops is the range where the turntable of the playback device can chuck the disc. It is hoped for. However, the above configuration has the following problems.

First, the rotating tray is stopped by the control circuit output from the light emitting element. However, there are cases where the stop position of the rotating tray varies greatly and the turntable of the reproducing apparatus cannot chuck the disc.

Second, a reflector is attached to the lower portion of the rotating tray, and the rotation of the rotating tray is stopped due to the relationship between the reflection of the reflector and the light emitting / receiving elements. However, the reflector is attached to the lower portion of the rotating tray. There is a problem that the output of the light receiving / emitting element is not stable due to the variation of the stop position due to the accuracy of the reflection, or the clouding of the reflector itself due to dust or the like attached to the reflector.

(3) The rotating tray rotates while riding on three rollers provided on the tray base. However, when receiving the roller, it is necessary to perform the operation on a portion having a surface on the entire circumference. However, since the outer peripheral portion of the rotating tray is cut out in a U-shape as described above, the radius from the rotation center to the roller is not much. I can't take it big. For this reason, the dimensions of the outer peripheral portion are shifted up and down due to the warp of the rotating tray itself and variations in dimensions, and the disc placed on the rotating tray hits the clamper, or the outer peripheral portion of the rotating tray contacts the tray base. There was a problem. In addition, the sound provided by the rollers provided on the shaft support member entering the concave portion of the rotating tray and the sound of rotating the side surface portion are generated, and the quality is significantly impaired.

(4) A compact disk (typically C
Since it is called D single, it will be referred to as CD single below)
Can be reproduced and played. By mistake, the end of this CD single is dropped on the U-shaped notch of the rotary tray, and the rotary tray is rotated for reproduction and playing. The CD single is placed on one side of the U-shaped portion of the rotary tray. , And falls into a notch at the rear of the tray base (a runaway when the playback device is raised). If this happens, this CD single will not only be able to play and play, but also if the tray base is pushed out of the housing again,
Since the single is not placed on the rotating tray or the tray base, there is a problem that the single cannot be taken out while entering the housing.

[0038]

In order to solve the above-mentioned problems, a disc changer according to the present invention is provided with a tray lock lever on a tray base, which rotates in conjunction with a lock gear.
A rib is provided on the tray base to allow the tip of the tray lock lever to enter, and a positioning pin is provided on one of the slide plates arranged on the left and right sides of the playback device. That is, a structure in which a guide groove is provided on the rotating tray so that the reproducing device can enter the disc at a position where the disc can be chucked, and a light emitting element provided on the clamp plate without using a component called a reflection plate,
A light-receiving element provided on the mechanical base opposite to the light-emitting element, a slit is provided on the rotating tray to allow light to enter the light-receiving element when it reaches the stop position, and three slits are provided on the tray base. Without using the rollers, and without using the shaft support member and the roller provided at the tip thereof, a plurality of felts hidden under the rotating tray at the disc mounting position are arranged on the tray base, and the An arc-shaped rib is provided at the lower portion with a radius from the center of rotation to almost the center of the U-shaped notch, and a structure is provided in which friction is caused by contacting the rib with the felt;
o. No. 1 of the rotating tray at the position where the disc is loaded in the station No. 1. The radial distance from the innermost part of the U-shaped notch of one station to the standing wall provided on the tray base is larger than the diameter of the CD single placed on the rotating tray, and The standing wall of the tray base continued to the vicinity of the reproducing apparatus, and felt was attached to a part of the standing wall. One station has a structure in which the radial distance from the innermost dimension of the U-shaped cutout portion is smaller than the diameter of the CD single.

[0039]

According to the present invention, the tray lock lever provided on the tray base is interlocked with the rotation of the lock gear, and the tip end of the tray lock lever enters the rib of the tray base, thereby providing the tray. Regulations before and after the base can be performed.

(2) Also, immediately before the playback device clamps the disc, that is, immediately before chucking, the slide plate moves from the rear to the front, so that the pin provided on the slide plate becomes
Since the disc passes through the guide groove provided on the rotating tray, the rotating tray is rotated and corrected from the position where the rotating tray is stopped to the correct stop position where the disc can be chucked, so that the reproducing apparatus can play the disc stably.

Further, since the rotary tray itself is provided with a slit corresponding to the stop position, and the reflector is not used, there is no variation in sticking of the reflector, and the stop position can be improved in accuracy. The output of the light receiving / emitting element is always stable because it is not affected by the environment.

(3) Since the ribs of the rotating tray are placed on a plurality of felts attached to the tray base, the distance from the center of rotation to the ribs can be increased.
The height of the outer periphery of the rotating tray is fairly stable. Therefore, the disc does not come into contact with the outer periphery of the clamper or the rotating tray and the tray base. In addition, since the shaft support member is not used, the operation sound becomes quiet.

(4) No. of rotating tray In the event that the CD single is accidentally dropped into the U-shaped notch of the first station and mounted and the CD tray is pressed by one side of the U-shaped notch, the rotating tray pushes the CD single.
This C between the standing wall of the tray base and the U-shaped notch
The D single enters and tries to rotate as it is, but the disc is blocked from rotating by the felt provided on the standing wall of the tray base, and the CD single passes through the U-shaped cutout of the rotating tray and falls on the tray base. . Thereafter, when the tray base is pushed out of the housing, the user can take out the CD single because the CD single is on the tray base.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In the drawings, the same parts as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIGS. 1 and 2 are layout diagrams of the tray section of this embodiment. FIG. 3 is a perspective view of a component position of the disc changer of this embodiment. FIG. 4 is a front sectional view of the tray section and the mechanical base, and FIG. 5 is an explanatory view of a tray lock lever section.

In FIG. 5A, reference numeral 107 denotes a lock gear of the present invention.
7b, the cam portion 108 of the tray lock lever 108
b to rotate the tray lock lever 108. Bosses 104b and 104c provided on the tray base 104 are respectively provided with through holes 10 of the lock gear 107.
The lock gear 107 and the tray lock lever 108 are mounted on the tray base 104 by fitting the through holes 108a of the tray lock lever 108 with the lock gears 107 and 110. The lock gear 107 and the tray lock lever 108 can be freely rotated around the bosses 104b and 104c of the tray base 104, respectively, even after being mounted.

FIG. 5B is a sectional view of the tray lock lever. The tip 108c of the tray lock lever 108 (see FIG. 5A) is
After the rotation of the tray base 101, the ribs 101d and 101e provided at the lower portion of the tray base 101
Position is regulated. In this figure, the rib 101a of the tray base 101 is a forward regulation, and the rib 101b is similarly a rear regulation. Further, a gear 107d is provided below the lock gear 107, and a force for rotating the lock gear 107 itself is received from this portion.

FIG. 1 corresponds to FIG. 19 (c) of the conventional example in which three discs can be loaded at the same time when the tray portion of the present invention is at the full discharge position. 102a
Is a place where a normal CD (diameter 12 cm) is placed, and 102b is a place where a CD single (diameter 8 cm) is placed.
o. One station carries a normal CD or a CD single disc, and plays and plays the disc. 102c, d, e, and f are rotating trays 1.
02 is a slit for stopping the rotation lock lever 13, and a notch 10 into which the rotation lock lever 13 enters.
2g, h, i, j. After the tray base 101 is housed in the housing, the rotating tray 102 rotates in the direction of arrow A, and normally the No. Play from the disc placed in the first station.

FIG. 2 shows the rotation tray 102 with N
o. The position of the rotary tray 102 when playing and playing one station is shown. This No. 1 has a guide groove 102l at the lower portion thereof. As shown in FIG.
02u and 102v are provided. This is the slide plate 1
06 is the guide groove 10 of the rotating tray 102.
It is for getting into 2l smoothly. Further, as shown in FIG. 2, No.
The same guide grooves 102m and 102 are provided in the third station.
Although not shown in the drawing and the drawing, a similar tapered portion for guiding is provided.

Although the mechanism for rotating and stopping the rotating tray 102 is the same as that of the conventional example, the present invention does not use a reflection plate, and instead, a slit is formed in the rotating tray 102 as shown in FIGS. 102c, d, e, and f are provided, and a printed board 112 is mounted on the clamp plate 106. A light emitting element 116 and a holder 115 for preventing inclination are provided on the printed board 112, and a mechanical board is provided immediately below the light emitting element 116. The light receiving element 117 is provided on the printed circuit board 111 mounted on the mechanical board 105 and the slit 105 c of the mechanical board 105. This light receiving element 117
In order to prevent the inclination, the holder 114 is similarly used. Also, as shown in FIG. 8, the width “C” of the slit 105 c provided on the mechanical substrate 105 has the same or larger dimensional relationship as the width “D” of the slit 102 c of the rotating tray 102. A power supply circuit 118 supplies a voltage for causing the light emitting element 116 to emit light.
Represents the output from the light receiving element 117,
Is a control circuit that issues a command to stop the operation.

As shown in FIGS. 2 and 4, an arc-shaped rib 102o,
P, q, r, s, and t are provided, and the rotating tray 102 can be rotated by riding on six felts 103 arranged on the tray base 101. The six felts 103 have the same shape in order to improve workability. Also, the six felts 103 are located below the rotating tray 102 even when the rotating tray 102 is at the stop position as shown in FIGS. 1 and 2 so that the felt 103 does not appear when the tray base 101 is pushed out. Has become.

As shown in FIGS. 1, 3, and 10,
No. of the rotating tray 102 A standing wall 101c of the tray base 101 is provided on the outer periphery of one station. The height of the standing wall 101c is higher than a normal disk placed on the rotating tray 102. In addition, No. The distance “A” from the innermost part of the U-shaped notch 102k to the standing wall 101c is CD
It is larger than the diameter of the single 120. The standing wall 1
01c, a felt 113 is attached to a portion from the reproducing apparatus 3, and the felt 113 and the N
o. The shortest distance “B” to the innermost part of the U-shaped notch 102 k is smaller than the diameter of the CD single 120.

The operation of the disk changer configured as described above will be described below.

First, the tray lock lever 1 will be described with reference to FIG.
Operation 08 will be described. FIG. 6A shows the tray table 104.
Is at the moment when it enters the housing, and the tray table 104 is stopped because it has been stored. However, the gear 44 is rotated by the mechanism of the conventional example, and the gear 10 of the lock gear 107 is rotated.
7b, the lock gear 107 rotates around the through hole 107a. Then, the pin 10 of the lock gear 107
7b pushes the cam portion 108b of the tray lock lever 108, so that the tray lock lever 108 rotates around the through hole 108a. Then, as shown in FIG. 6B, the tray lock lever 108 is provided on the rib 1 provided on the tray base.
01d and e. However, the lock gear 107
The pin 107b of the lock gear 107 at this time is rotated by receiving the force from the gear 44,
08 is disengaged from the cam portion 108b, so that the tray lock lever 108 does not rotate any more. Next, in FIG. 6C, the force is not transmitted from the gear 44 to the lock gear 107,
When the lock gear 107 is rotated by the force of the spring 22, FIG.
Rotate until (d). At this time, the pin 107 (b) of the lock gear 107 is
Since 08 (b) is pressed, the tray lock lever 108 is fixed. Therefore, the tray base 101 can also be regulated back and forth.

Next, as shown in FIGS. 2 and 7, the slide plate 106 moves from the direction of arrow D to the direction of arrow C in the guide groove
6b enters. Before and after this, the reproducing device 3 is being lifted by the cam portion of the slide plate 106 (see FIG. 21 of the conventional example), but after the pin 106b completely enters the guide groove 102l of the rotating tray 102, the rotating tray 102 The playback device 3 is configured to chuck the disc placed on the. Therefore, the variation in the stop position of the rotating tray 102 is reduced by the pin 106b of the slide plate 106 entering the guide groove 102l of the rotating tray 102.
The rotation of the rotating tray 102 can be corrected to a correct position.

The stop of the rotating tray 102 is as follows. As shown in FIG. 9, the rotating tray 102 rotates in the direction of arrow A, and the slit 102c of the rotating tray 102 is rotated.
Comes near the light emitting element 116,
From the light reaches the light receiving element 117. Then, the light receiving element 117 reacts and a voltage is output, and it is understood that the rotating tray 102 has come to the position to be stopped.
FIG. 9A shows an output characteristic diagram of the light receiving element 117. When no light enters the light receiving element 117,
Hi ", when the slit 102c of the rotating tray 102 approaches the light emitting element 116, light enters the light receiving element 117, and the output of the light receiving element 117 changes. When the time" t1 "comes, the output voltage is increased. "Hs".
This “Hs” is a value called a threshold voltage and recognized by the control circuit 119. At this time, the control circuit 119
The supply of the voltage to the rotation tray 102 is stopped, and the rotation of the rotating tray 102 is stopped via a series of reduction mechanisms. “Lo” is the output of the light receiving element 117 when the light of the light emitting element 116 passes through the width of the slit 102c. FIG. 9B shows a time change diagram of the angular velocity around the outer periphery of the rotating tray 102. Since the rotating tray 102 starts to stop at the time “t1”, the angular velocity decreases, and the time “t2”. And the angular velocity becomes zero. That is, at this time, the rotating tray 102 stops. In addition, from the time “t1” shown in FIG.
The area “S” of the angular velocity up to 2 ”is the amount of overrun from when the control circuit 119 issues a stop command to when the rotary tray 102 stops.

As shown in FIGS. 2 and 4, arc-shaped ribs 102 o, p, q, and 102 of the rotating tray 102 lie on the six felts 103 arranged on the tray base 101.
Since r, s, and t rotate, friction occurs due to contact with the surface of the felt 103, which is effective in stopping the rotating tray 102 quickly. The centers of the arc-shaped ribs 102p, r, and t of the rotating tray 102 are the same as the center of rotation of the rotating tray 102, but the centers of the arc-shaped ribs 102o, q, and s are the center of rotation of the rotating tray 102. Removed from This is because the arc-shaped ribs 102p, r, and t of the rotating tray 102 have a constant surface that comes into contact with the felt 103 even when the rotating tray 102 rotates, and may be seized. Rib 1
By providing 02o, q, and s, the surface to be brought into contact with the felt 103 is not constant, so that burn-in can be prevented. Further, since the felt 103 does not appear on the appearance, even if powder on the felt 103 remains due to the scraping of the rib 102o (representative) due to the repetitive operation, the appearance is not impaired because the user cannot see it.

Also, as shown in FIG.
When the player is mistakenly placed on the tray base 101 and tries to play, the rotating tray 102 rotates and the CD single 120 is rotated as shown in FIG.
The end of the CD single 120 hits No. 3 and no longer rotates. Also, since the dimension from the standing wall 103c of the tray base 101 to the innermost part of the U-shaped cutout 102k of the rotating tray 102 is larger than the diameter of the CD single 120, the CD single 120 is placed on the rotating tray 102. Part falls to the tray base 101 and stops.

As described above, according to the embodiment of the present invention, the following effects can be expected. First, since the tray lock lever 108 regulates the ribs 101d and 101e of the tray base 101, the front and rear positions of the tray base 101 with respect to the tray base 104 are determined. Therefore, the position of the rotating tray 102 on the tray base 101 is determined, and the position of the disk placed on the rotating tray 102 is determined. Therefore, a chucking mistake between the turntable 4 of the reproducing apparatus 3 and the disk can be eliminated. In addition, rattling before and after the tray base 101 is reduced, and the quality can be improved.

The pins 106b,
By simply providing the shape of the guide groove 102l below the rotating tray 102, the stop position of the rotating tray 102 can be corrected to a correct position without increasing the number of components.

Further, by simply providing the slit 102c (representative) for stopping the rotary tray 102, it is possible to reduce the number of components such as the reflection plate 10 and also to reduce the number of working steps. Improvement and stabilization of the output of the light receiving element 117 can be realized. Light emitting element 1
16, the light receiving element 117 includes the clamp plate 105 and the mechanical base 1
05, which is not on the same side as the playback device 3, that is, on the side of the moving tray unit, so that the wiring is easy to connect. The accuracy is greatly improved as compared with the case where the light receiving element 117 is provided in the tray section.

The arc-shaped rib 1 of the rotary tray 102
Since 02s and t can be provided in the vicinity of the outer periphery and can be put on and rotated on the six felts 103 arranged on the tray base 101, the warp of the rotary tray 102 and variations in dimensional accuracy with respect to the outer periphery can be absorbed. Further, the shaft support member 16,
Since a component called the roller 15 is not used, cost reduction by reducing the number of components and an improvement in quality such as a reduction in operation noise can be realized.

The standing wall 1 provided on the tray base 101
The simple configuration of attaching the felt 113c and the felt 113 can prevent the small-diameter CD single 120 from entering the housing.

In this embodiment, the rotating tray 102 is rotated only in the direction of arrow A. 3
It is needless to say that the same effect can be obtained even if the standing wall 101c and the felt 113 are provided at the symmetric position at the station, that is, the right rear portion of the tray base 101.

[0065]

As described above, the disc changer of the present invention has a structure in which a tray lock lever that rotates by itself in conjunction with a lock gear is provided on a tray base, and a rib for inserting the tip of the tray lock lever is provided on the tray base. By taking the above, the tray lock lever provided on the tray base interlocks with the rotation of the lock gear, and the front end of the tray lock lever enters the rib of the tray base, thereby regulating the front and rear of the tray base. it can.

Further, pins for positioning are provided on one of the slide plates arranged on the left and right sides of the reproducing apparatus, and these pins are properly inserted at a correct stop position of the rotating tray, that is, a position where the reproducing apparatus can chuck the disc. By adopting a structure in which such a guide groove is provided in the rotary tray, the pin provided on the slide plate by moving the slide plate from the rear to the front just before the playback device clamps the disc, that is, immediately before chucking, Since the rotation tray passes through the guide groove provided in the rotation tray, the rotation tray is rotated and stopped to a correct stop position where the disk can be chucked, so that the playback device can play the disk stably.

Also, without using a component called a reflection plate, a light emitting element provided on a clamp plate, a light receiving element provided on a mechanical base opposite to the light emitting element, By adopting a structure in which a slit that allows light to enter the light-receiving element is provided on the rotating tray, a slit corresponding to the stop position is provided on the rotating tray itself, so a reflector is not used. As a result, the accuracy of the stop position can be improved, and the output of the light emitting / receiving element is always stable because it is not affected by the environment such as dust.

Also, instead of using the three rollers provided on the tray base, a plurality of felts hidden at the lower part of the rotary tray at the disc mounting position are arranged on the tray base, and the center of rotation is provided at the lower part of the rotary tray. A circular arc-shaped rib is provided with a radius from the center to the center of the U-shaped notch, and a friction is applied by bringing the rib into contact with the felt. Since the arc-shaped ribs of the rotary tray rest on the felt, the distance from the center of rotation to the ribs can be increased, so that the height of the outer peripheral portion of the rotary tray is considerably stabilized. Therefore, the disc does not come into contact with the outer periphery of the clamper or the rotating tray and the tray base.

Further, the rotation tray No. No. 1 of the rotating tray at the position where the disc is loaded in the station No. 1. 1
The radial distance from the innermost part of the U-shaped notch of the station to the standing wall provided on the tray base is larger than the diameter of the CD single placed on the rotating tray, and The standing wall of the tray base continued to the vicinity of the reproducing apparatus, and felt was attached to a part of the standing wall. 1 has a structure in which the radial distance from the innermost dimension of the U-shaped notch of the station No. 1 is smaller than the diameter of the CD single. In the case where the end of the CD single is mistakenly dropped into the U-shaped cutout portion of the first station and the CD single is mounted, and the user tries to play the CD single, the rotating tray is set to the U-shaped.
One side of the notch of the letter shape pushes, but this CD single enters between the standing wall of the tray base and the notch of the U-shape and tries to rotate as it is, but is provided on the standing wall of the tray base. The felt blocks the disc from rotating, and the CD single passes through the U-shaped cutout of the rotating tray and falls on the tray base. Thereafter, when the tray base is pushed out of the housing, the user can take out the CD single because the CD single is on the tray base.

[Brief description of the drawings]

FIG. 1 is a plan view of a tray unit in an embodiment of a disc changer of the present invention.

FIG. 2 is a plan view of the tray unit.

FIG. 3 is an exploded perspective view showing the positional relationship of the parts.

FIG. 4 is a front sectional view of the tray unit and a mechanical base.

FIG. 5A is a perspective view of the tray lock lever, and FIG.

FIG. 6 is a plan view showing the operation relationship of the tray lock lever unit.

FIG. 7 is a perspective view of the rotary tray and a slide plate.

FIG. 8 is a perspective view of the rotating tray unit and a light emitting and light receiving element unit.

9A is a time change diagram of the output of the light emitting element, and FIG. 9B is a time change diagram of the angular velocity of the rotating tray.

FIG. 10 is a plan view of the tray unit at a mounting position.

FIG. 11 is a plan view of the tray unit in a position where the rotating tray is rotating.

FIG. 12 is a plan view of a tray portion of a conventional disc changer.

FIG. 13 is an exploded perspective view showing the positional relationship of the parts.

FIG. 14 is a rear view of the rotating tray.

FIG. 15 is an operational exploded view of the lock lever.

FIG. 16 is a plan view of the tray base.

FIG. 17 is a front sectional view of the tray unit and the mechanical base.

FIG. 18 is an operational exploded side view of the tray unit.

FIG. 19 is an operational exploded plan view of the tray unit.

FIG. 20 is a plan view of a rotating unit of the mechanical base.

FIG. 21 is a side view of the reproducing apparatus and a slide plate.

FIG. 22 is a plan view showing the vertical drive relationship of a playback device using a slide plate.

FIG. 23 is a cross-sectional view showing a transmission relationship of a rotating unit on the mechanical base.

FIG. 24 is an exploded plan view of the operation of the cam gear.

FIG. 25 is an exploded plan view of the operation of the cam gear.

FIG. 26 is an operational exploded plan view of the gear 41.

FIG. 27 is an operational exploded plan view of the drive gear.

FIG. 28 is an operational exploded plan view of the drive gear.

FIG. 29 is an operational exploded plan view of the lock gear 21.

FIG. 30 is a block diagram of the electric circuit.

FIG. 31 is an electric output waveform diagram of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tray base 2 rotating tray 3 reproducing device 4 turntable 5 optical pick 6 rotating tray gear 7 rotating shaft 9, 15 roller 10 reflector 12 connecting gear 13 rotation lock lever 14 spring 16 leaf spring support member 18 speed-up gear 20 Mechanical base 21 Lock gear 23, 24 Slide plate 25 Lever 26 Housing 27 Front panel 29 Fixing plate 30 Motor 31 Motor pulley 32 Belt 33, 34 Gear 35, 37 Lever 36 Cam gear 39 Electromagnet 40 Movable piece 41, 43, 44 Gear 45 Drive gear 50 Count ring 51 Rotation speed detection light emitting / receiving element 52 Cam position detection switch 53 Tray position detection switch 54 Rotating tray position detection light emitting / receiving element 101 Tray base 102 of the present invention 102 Rotating tray 103 Felt 104 Tray base 105 of the present invention 105 Same mechanical base 106 the slide plate 107 the lock gear 108 tray lock lever 109, 110 screwed 113 felt 116 emitting element 117 light-receiving element 118 power circuit 119 control circuit 120 CD Single

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yuji Yuji ▼ 1006 Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References Japanese Utility Model No. 5-33343 (JP, U) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) G11B 17/24

Claims (5)

(57) [Claims] 1. A drive mechanism provided in a housing pushes out of the housing or is placed on an upper portion of a tray base for storage.
A tray base interlocked with the movement of the tray base is provided via a gear provided on the tray base, a rotation shaft is provided on the tray base, and a disk receiving portion on which three disks are mounted is evenly distributed. Equipped with a rotating tray arranged and formed, a playing device for sequentially playing and playing the discs placed on the rotating tray,
In addition, a lock gear that restricts the tray base from moving in the push-out direction when the tray base is stored by rotating by itself, and moves the tray base in the push-out direction or the storage direction by interlocking with the lock gear and rotating by itself. A disc changer wherein a tray lock lever for regulating is provided on the tray base. 2. A tray base horizontally moving from a position where a disc is mounted into a playable housing, a rotating shaft provided on the tray base, and a disc receiving portion on which three discs are mounted is equally distributed. , A driving mechanism for horizontally driving the tray base, and a reproducing device for reproducing and playing a disk in the housing, provided on slide plates disposed on the left and right sides of the reproducing device. By the cam shape, there is provided a mechanism that enables playing by moving the slide plate up and down and moving the playback device up and down.Furthermore, immediately before the playback device clamps the disc, a pin provided on one of the slide plates is provided. A disc changer configured to pass through a guide groove provided in the rotating tray. 3. A tray base horizontally moving from a position where a disc is loaded into a playable housing, a rotating shaft provided on the tray base, and a disc receiving portion on which three discs are mounted is equally distributed. , A drive mechanism for horizontally driving the tray base, a playback device for playing and playing the disc in the housing, and a clamp holding a clamper for clamping the playback device when playing the disc. Plate, the clamp plate is provided with a light emitting element, the mechanical base in the housing is provided with a light receiving element at a position corresponding to the light emitting element, the rotary tray is provided with a slit corresponding to the stop position, A disk changer comprising a control circuit for stopping the rotary tray by detecting light from a light emitting element passing through the slit and the light receiving element detecting the light. 4. A tray base horizontally moving from a position where a disc is loaded into a playable housing, a rotating shaft provided on the tray base, and a disc receiving portion on which three discs are mounted is equally distributed. A rotating tray disposed horizontally, a motor and a driving mechanism for horizontally driving the tray base, a rotating mechanism for rotating the rotating tray so that the discs placed on the rotating tray can be sequentially played and played, and a disc. A plurality of felts are arranged on the tray base, arc-shaped ribs are provided at a lower portion near the outer periphery of the rotating tray, and friction is given by contacting the ribs. In a position where the tray base is further extruded and the disc is mounted on the rotating tray, the felt is located below the rotating tray so that the felt is invisible or almost invisible. A disk changer characterized by being achieved. 5. A tray base horizontally moving from a position where a disc is mounted to a playable housing, a rotating shaft provided on the tray base, and a disc receiving portion on which three discs are mounted is equally arranged. A rotary tray having three U-shaped notches, a drive mechanism for horizontally driving the tray base, and a rotary mechanism for sequentially playing and playing the discs placed on the rotary tray. A rotating mechanism for rotating the tray and a reproducing device for playing and playing the disk are provided, and the disk mounting position of the rotating tray that comes first at the position of the reproducing device for rotating and playing the disk and playing the disk is first. The radial distance from the innermost part of the U-shaped notch of the first station of the rotating tray to the standing wall provided on the tray base at the mounting position of the disk is the rotating tray. To The standing wall of the tray base is larger than the diameter of the small-diameter disc to be mounted, and the standing wall of the tray base continues to the position of the reproducing apparatus. A felt is attached to a part of the standing wall, and the felt and the first A disk changer characterized in that a radial distance from the innermost part of the U-shaped notch of the station is smaller than the diameter of the small-diameter disk.