JP3166903B2 - Gear drive mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gear driving mechanism for selectively driving a pair of driven gears.

[0002]

2. Description of the Related Art As shown in FIG. 35, when there are a pair of driven gears 201 and 202 which are not meshed with each other and it is desired to rotate both of them at the same time or only one of them, Thus, the drive sources 203 and 204 are individually provided. As described above, the gear driving mechanism having the driving source for each driven gear is expensive.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a gear drive mechanism capable of selectively driving two gears by a single drive source. Is provided at low cost.

[0004]

SUMMARY OF THE INVENTION A gear driving mechanism according to the present invention has a range including a meshing position at which a driving force is transmitted and a non-meshing position at which a driving force is not transmitted. Two movable driven gears (29, 30)
And an interlocking mechanism (29f, 30f, 40) that moves the other driven gear in conjunction with the movement of one driven gear,
The interlocking mechanism moves the other from the non-meshing position to the meshing position in conjunction with the movement of one of the driven gears at the meshing position so that the two driven gears are both at the meshing position, The one is moved from the meshing position to the non-meshing position in conjunction with the movement of the other moved to the meshing position.

[0005]

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disc player including a gear driving mechanism according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 3, an upper tray 8 and a lower tray 9 carrying discs 5 and 6 to be played can protrude out of the player housing on the front surface or front panel 3 of the player housing 2. Thus, the rectangular disk supply port 3a extending in the left-right direction is provided. However, the arrow Y direction is forward and the arrow X direction is left. Arrow Z indicates the upper direction. The disk 5 is, for example, a compact disk having a diameter of about 12 cm, and the disk 6 is a disk having a diameter of about 8 cm. Both trays 8 and 9 are juxtaposed in a direction perpendicular to the disk carrying surface of the turntable described later, that is, in the vertical direction (the direction of arrow Z and the direction opposite thereto).
Two large and small circular recesses 8a, 8b, 9a, 9b into which the disks 5 and 6 are to be fitted are formed concentrically. A pair of upper and lower doors 10 and 11 for closing the disk supply port are swingably provided near the disk supply port 3a, and open and close in synchronization with the protruding and storing operations of the trays 8 and 9. A switch group 13 for operating the front loading disc player is provided on the front panel 3.

As shown in FIGS. 4 and 5, a vertical chassis 15 is provided in the player housing 2 as a guide member made of, for example, a steel plate. The vertical chassis 15 is fixed on a horizontal chassis 16 as shown in FIG. As shown in FIGS. 2 and 4, a turntable 17 is provided on the horizontal chassis 16.
As shown in FIG. 2, a carriage 20 carrying an optical pickup including an objective lens 19 is movably provided on the horizontal chassis 16 along the recording surface of the disc placed on the turntable 17. Has been
Carriage manual means (not shown) for moving the carriage is provided.

Next, a guide driving means for guiding and moving the upper tray 8 and the lower tray 9 to the projecting position, the storing position, and the playing position with respect to the player housing 2 will be described. The upper tray 8 and the lower tray 9
Are formed in substantially the same shape, and details thereof are shown in FIG.
It is shown in (b). As shown in FIGS. 2 to 4, an upper plate 23 and a lower plate 24 are provided on the left side surface of the vertical chassis 15, and the upper tray 8 and the lower tray 9 are provided at the right ends thereof. Are supported movably in a direction parallel to the disk carrying surface 17a (FIG. 4) of the turntable 17, in this case, in the front-rear direction (the arrow Y direction and the opposite direction). The details of the upper plate 23 and the lower plate 24 are shown in FIG.
(b) and FIGS. 8 (a) and (b). Specifically, the upper plate 23 and the lower plate 24 are formed with elongated holes 23a and 24a along the extending direction thereof, and the pins 8 projecting from the right end of the upper tray 8 and the lower tray 9 are provided in pairs.
d and 9d are slidably engaged with the long holes.

2 to 4 and FIGS. 7 and 8
As shown, the upper plate 23 and the lower plate 2
A pair of pins 23b and 24b projecting from the right side surface of the vertical chassis 15 in the front-rear direction (the direction of the arrow Y and the opposite direction) project from each other. Are slidably fitted in the upper guide hole 26 and the lower guide hole 27 respectively.
That is, the upper guide hole 26 and the lower guide hole 27, respectively.
The upper plate 23 and the lower plate 24 are adapted to move along. The upper guide hole 26 and the lower guide hole 27 as a whole
(Shown in FIG. 4) extends along a plane perpendicular to the rotation center axis in a plane parallel to the rotation center axis direction, that is, in this case, in the front-back direction (arrow Y direction and the opposite direction). . More specifically, the upper guide hole 26 and the lower guide hole 27 have a first hanging portion 26a, which extends downward at a deepest portion, that is, at a rear end thereof, along a surface orthogonal to the disk carrying surface of the turntable 17 (FIG. 4). 27a, and second suspending portions 26b and 27b extending parallel to the first suspending portion at a position shallower than the deepest portion. These first hanging portions 26a and 27a and the second hanging portion 26
Between b and 27b are first flat portions 26c and 27c extending in the front-rear direction (the direction of the arrow Y and the opposite direction). In addition, it has second flat portions 26d, 27d for projecting the tray extending in the direction approaching the disk supply port 3a, that is, extending forward, following the second hanging portions 26b, 27b.

As shown in FIGS. 2 to 4, an upper rack 29 and a lower rack 30 as driven gears in the form of rectangular plates are arranged so as to sandwich the vertical chassis 15 together with the above-mentioned upper plate 23 and lower plate 24. I have. 9 (a) to 9 (c) show details of the upper rack 29, and FIGS. 10 (a) to 10 (c) show details of the lower rack 30. The upper rack 29 and the lower rack 30 are respectively attached to the receiving portions 15a of the vertical chassis 15 so as to be able to reciprocate in the front-rear direction (the direction of the arrow Y and the opposite direction). The pins 23b and 24b projecting from the outer surfaces of the upper plate 23 and the lower plate 24 are connected to the upper guide hole 26 and the lower guide hole 2 formed in the vertical chassis 15.
7 slidably engage with the mountain-shaped cam grooves 29a, 30a formed on the left side surfaces of the upper rack 29 and the lower rack 30. As shown in FIG. 9 (c), FIG. 10 (c), FIG. 11 and FIG. 12, the mountain-shaped cam grooves 29a, 30a are formed by a pair of inclined portions 29b, 29c, 30b,
30c. Each of the slanted portions is formed by a first guide hole 26 and a first guide hole 27 formed in the vertical chassis 15.
It is inclined at a predetermined angle with respect to the hanging parts 26a, 27a and the second hanging parts 26b, 27b. That is, the upper rack 29 and the lower rack 30 are moved back and forth (the direction of the arrow Y and the opposite direction)
To move the upper plate 23 and the lower plate 24 along the upper guide hole 26 and the lower guide hole 27, respectively.
a is formed.

As shown in FIGS. 11 and 12, the lower rack 30 is provided with an oscillating member 32 near the continuation of the two inclined portions 30b and 30c forming the mountain-shaped cam groove 30a. It is attached so that it can swing around the center. A tip 32b is formed at the free end of the swinging member 32, and the tip 32b can protrude into a continuous portion of the above-mentioned both inclined portions 30b, 30c. Further, a spring member 32c for applying a restoring force to the swing member 32 is provided. The vertical chassis 15 is provided with a linear cam member 33 with which the swing member 32 slides, extending along the moving direction of the upper rack 30, that is, in the front-rear direction (the direction of the arrow Y and the opposite direction). As shown in FIG. 12, the linear cam member 33 has a notch 33a, and functions as a swing member driving means for swinging the swing member 32 in accordance with the movement of the upper rack 30. The linear cam member 33 and the spring member 3
2c, the lower plate 24
A guide means for selectively guiding the pin 24b to one of the pair of inclined portions 30b and 30c of the mountain-shaped cam groove 30a as the lower rack 30 moves. That is, if it is attempted to move the pin 24b along the lower guide hole 27 using only the mountain-shaped cam groove 30a without providing such a guiding means, for example, when the lower rack 30 moves forward (in the direction of arrow Y), The first lower portion 2 of the lower guide hole 27 is formed by the action of the one inclined portion 30b of the shape cam groove 30a.
The pin 24b that has been raised in the inside 7a subsequently does not shift to the first flat portion 27c, but instead descends again along the first hanging portion 27a by the action of the other inclined portion 30c. The above-described guide means prevents the pins 24b from moving backward in accordance with the movement of the lower rack 30. Thus, for example, when the lower rack 30 moves forward, the pins 24b are connected to one side of the mountain-shaped cam groove 30. Slope 30 of
b, the first hanging part 27a of the lower guide hole 27
And the backward movement is prevented by the swinging member 32 when the ascending is completed. In this state, the pin 24b horizontally moves forward along the first flat portion 27c of the lower guide hole 27,
Next, it descends in the second hanging portion 27b by the action of the other inclined portion 30c of the mountain-shaped cam groove 30. After this, pin 2
4b moves horizontally in the tray protruding second flat portion 27d. Such a guiding means including the rocking member 32 is a lower rack 3
0, as well as on the upper rack 29.

As shown in FIG. 3, the upper rack 29 and the lower rack 30 are provided with a single pinion 35 as a drive gear.
Can be movably engaged with each other in opposite directions. Pinion 3
5 is rotated by a motor 37 via a speed reduction mechanism 36 formed by combining a plurality of gears and the like. As shown in FIGS. 9 (a) and 10 (a), toothless portions 29e and 30e are formed at the front ends of the upper rack 29 and the lower rack 30, respectively. As shown in FIGS. 9 (a) and 9 (b) and FIGS. 10 (a) and (b), the right side surfaces of the upper rack 29 and the lower rack 30 extend over substantially the entire length of each rack. And 30f are formed. As shown in FIG. 3, a cam follower 40 which is always engaged with the two cam grooves 29f and 30f is provided, and a sub-chassis 41 fixed to the vertical chassis 15 is mounted on the sub-chassis 41 in an up-down direction (arrow Z direction) And the opposite direction). First
3 (a) and (b) show details of the cam follower 40. FIG.
The cam follower 40 has a pair of upper and lower pins 40a and 40b, and the pins are in sliding contact with the cam grooves 29f and 30f. By means of the cam follower 40 and the cam grooves 29f, 30f slidably contacting with each other, when one of the upper rack 29 and the lower rack 30 reaches a predetermined position, the activation means activates the other to a position for meshing with the pinion 35. Is configured. That is, for example, when the lower rack 30 is not meshed with the pinion 35 due to the missing tooth portion and the upper rack 29 meshed with the pinion 35 moves by a predetermined distance, the cam grooves 29f and 30f and the cam follower 40 are moved. Causes the lower rack 30 to move forward by a predetermined distance (in the direction of the arrow Y), whereby the lower rack 30 meshes with the pinion 35 and
Is started in the direction opposite to the direction in which the upper rack 29 moves. Note that the upper rack 29 has a toothless portion 29e.
The same applies when the pinion 35 is not engaged with the pinion 35, and conversely, one of the upper rack 29 and the lower rack 30 is moved in accordance with the movement of the other.
And a non-meshing state.

[0013] With such a construction, the upper rack 29 and the lower rack 30 as a pair of driven gears are moved in opposite directions by a single motor 37 without providing a separate driving source for each of the two racks. Or selectively driven. As shown in FIGS. 2 and 4, the upper plate 23 and the lower plate 24 which support the right end portions of the upper tray 8 and the lower tray 9 movably in the front-rear direction (arrow Y direction and the opposite direction).
Are provided with gears 43 and 44 on the lower surface thereof. As shown in FIGS. 2 and 5, rack portions 45, 46 and 47 are provided on the left side surface of the vertical chassis 5,
The gears 43 and 44 mesh with one of the rack portions according to the vertical movement of the upper plate 23 and the lower plate 24, respectively. Also, the upper plate 23 and the lower plate 24
Transition rack portions 49 and 50 are formed for moving the respective gears 43 and 44 to transition between the respective rack portions during the vertical movement of the rack. As shown in FIGS. 2, 4 and 6 (b),
On the lower surfaces of the upper tray 8 and the lower tray 9, a rack portion 8 that extends in the direction of protruding storage with respect to the player housing 2, that is, the front-back direction (the direction of the arrow Y and the direction opposite thereto).
f and 9f are formed respectively, and each of the gears 43,
44 also meshes with these rack portions 8f and 9f.

The gears 43 and 44 and the rack 4
5, 46, 47, 8f, 9f and the transition rack portions 49 and 50, the upper plate 23 and the lower plate 2
A double-speed mechanism is configured to move the upper tray 8 and the lower tray 9 with respect to each of the plates at twice the moving speed of each of the plates in accordance with the movement of the plate 4. The above-mentioned double speed mechanism, the pinion 35, the drive source including the motor 37 and the speed reduction mechanism 36 for rotating the pinion, the upper rack 29 and the lower rack 30, the upper plate 23 and the lower plate 24, and the related peripherals The small member constitutes a driving means for moving the upper tray 8 and the lower tray 9 along the upper guide hole 26 and the lower guide hole 27 of the vertical chassis 15, respectively.

As described above, the upper tray 8 and the lower tray 9 are guided with their right ends supported by the upper plate 23 and the lower plate 24. On the other hand, as shown in FIGS. 2 and 4, the left ends of the upper tray 8 and the lower tray 9 are movably supported in the front-rear direction (the direction of the arrow Y and the opposite direction) by the movable holding member 53. I have. The movable support member 53 is mounted on the horizontal chassis 16.
The guide member 54 fixed on the upper and lower sides (arrow Z)
Direction and the opposite direction). FIGS. 14 (a) to (c) show details of the movable carrying member 53, and FIGS. 15 (a) and (b) show details of the guide member 54. FIG. As shown in FIGS. 4 and 14 (a) to (c), a linear guide on which the left ends of the upper tray 8 and the lower tray 9 are slidably fitted is on the right side surface of the movable supporting member 53. Grooves 53a and 53b are formed. Also, three pins 53c are protruded from the left side surface of the movable supporting member 53, and three guide holes 54a, 54 formed in the guide member 54 so as to extend in the up-down direction (the direction of the arrow Z and the opposite direction).
Each of the pins is slidably fitted to each of the pins b and 54c, so that the movable supporting member 53 can move up and down.

As shown in FIGS. 2 and 3, an interlocking member 56 is disposed between the vertical chassis 15 and the above-mentioned guide member 54, and a disk supporting surface of the turntable 17 is supported by a support pin 56a. Is attached to the vertical chassis 15 and the guide member 54 so as to be swingable in a plane perpendicular to the vertical axis. 16 (a) and 16 (b) show details of the interlocking member 56. Pins 56 are provided at the left and right free ends of the interlocking member 56.
The right pin 56b is slidably fitted in a long hole 24d formed in the lower plate 24 by extending in the front-rear direction (the arrow Y direction and the opposite direction). . Further, the left pin 56c is fitted into the long hole 53d formed in the movable supporting member 53 described above. That is, as the lower plate 24 moves up and down together with the lower tray 9 supported by the lower plate 24, the movable supporting member 53 moves up and down through the interlocking member 56 as the interlocking means together with the pin 56c slidingly contacting it. It is. In this embodiment, the supporting members movably supporting the left end portions of the upper tray 8 and the lower tray 9 each include a movable supporting member 53 and a pin 56c. Alternatively, the movable supporting member 53 may be omitted, and a pair of pins 56c may be provided for the upper tray 8 and the lower tray 9, and the respective pins 56c may directly carry each of the trays. Further, the pin 56c may be formed integrally with the interlocking member 56.
With such a configuration, the guide member 54 for guiding the movable supporting member 53 becomes unnecessary, and this can be reduced.

The interlocking means, the supporting member including the movable supporting member 53 and the pin 56c, the guide member 53, the vertical chassis 15 as another guide member, and the upper guide hole 26 and the lower guide hole 27 of the vertical chassis. A guide drive for guiding and moving each of the upper tray 8 and the lower tray 9 to the projecting position, the storing position, and the playing position with respect to the player housing 2 by the above-described driving means for moving the upper tray 8 and the lower tray 9 along the same. Means are configured. The guide driving means positions one of the upper tray 8 and the lower tray 9 when the other tray is in the storage position or the projecting position when one of the upper tray 8 and the lower tray 9 is in the playing position. The guide driving means, the upper tray 8 and the lower tray 9 constitute a disk transport mechanism for carrying a disk to be played and transporting the disk to the turntable 17 in the player housing 2.

Here, the upper guide hole 26 and the lower guide hole 27 formed in the vertical chassis 15 will be described in detail.
As described above, the upper guide hole 26 and the lower guide hole 27
Are the first hanging parts 26a, 27a and the second hanging parts 26b, 2
7b. That is, for example, the upper guide 8 is
a, the first flat portion 26c and the second
The turntable 17 is moved along the hanging portion 26b in order.
When moving while avoiding the above, the other lower tray 9 moves in conjunction with this, the second hanging part 27b of the lower guide hole 27, the first flat part 27c continuous with the second hanging part, and the first hanging part 2
It is configured to move while avoiding the turntable 17 sequentially along 7a. As described above, since one of the two trays 8 and 9 is also moved up and down in accordance with the up and down movement, at least a part of both trays 8 and 9 are placed in a plane parallel to the disk carrying surface of the turntable 17. However, even if they overlap each other, they do not interfere with each other during movement, and by making them overlap, the size of the player in the plane is minimized.

As is apparent from FIG. 5, the lower end of the first hanging portion 26a of the upper guide hole 26 is connected to the second hanging portion 26b.
The lower end of the first hanging portion 27a of the lower guide hole 27 is located above the lower end of the second hanging portion 27b. With such a configuration, it is possible to adjust the position of the two trays 8 and 9 near the disk supply port 3a (shown in FIGS. 1, 2 and 5) in the vertical direction (the direction of the arrow Z and the opposite direction). The two trays are protruded and stored in the player housing 2 at an appropriate distance from each other.

Next, a description will be given of a disk clamp mechanism for clamping a disk carried by the above-described disk carrying mechanism and placed on the turntable 17. As shown in FIGS. 2 and 3, a plate-like support member 58 is disposed above the interlocking member 56, and the disk of the turntable 17 is supported via a support pin 58a similarly to the interlocking member 56. It is attached to the vertical chassis 15 and the guide member 54 so as to swing freely in a plane perpendicular to the supporting surface. 17 (a) and 17 (b) show details of the support member 58. FIG. As shown in FIGS. 4 and 17 (a) and (b), a turntable 1 is provided at the free end of the support member 58.
A disk-shaped pressing member 59 for pressing a disk placed on the disk 7 toward the turntable is rotatably mounted. The pressing force of the pressing member 59
The magnet 59a provided on the turntable 17 and a magnetic member (not shown) fixed to the turntable 17 are obtained by adsorption. A pair of rollers 58b, 58c is provided on the left side of the free end of the support member 58, and these rollers are connected to the upper plate 23 (see FIGS. 2, 3, 4, and 7). Engaging surface 23 formed on the upper edge
e, 23f (shown in FIG. 7 (b)). That is, the upper tray 8 on which the upper plate 23
The supporting member 58 swings by appropriately pressing the pair of rollers 58b and 58c when moving up and down. As will be described later, the upper plate 23 as an engagement member with the support member 58 engages with the roller 58b near the tip of the support member 58 in the first section of the vertical movement path, and Roller 58 in a second section different from
B engages with another roller 58c between the support pin 58a and the support pin 58a that is the swing center axis.

As shown in FIG. 3, the position of the upper tray 8 and the lower tray 9 is detected by detecting the positions of the upper rack 29 and the lower rack 30 on the sub-chassis 41 arranged on the side of the vertical chassis 15. The three detection switches 61, 62 and 63 for performing the above are arranged in the front-rear direction. The center detection switch 62 operates when the lower end of the cam follower 40 provided between the upper rack 29 and the lower rack 30 abuts on the cam follower 40. Two other cam followers 65 and 66 are arranged before and after the cam follower 40, and are attached to the sub-chassis 41 so as to be able to reciprocate in the vertical direction together with the cam follower 40. FIGS. 18 (a) and (b) show details of the cam follower 65, and FIGS. 19 (a) and (b) show another cam follower 66.
The details are shown below. The two detection switches 61 and 63 sandwiching the detection switch 62 in the front and rear directions are the cam followers 65 and 6.
It operates when the lower ends of 6 abut. As shown in FIGS. 18 and 19, the cam follower 6
Pins 65a and 66a project from the left side surfaces of the upper and lower racks 30 and 30, respectively, and slidably engage with cam grooves 29g and 30g formed in the upper rack 29 and the lower rack 30, respectively. Accordingly, each of the cam followers 65 and 66 moves up and down as appropriate in accordance with the movement of the upper rack 29 and the lower rack 30.

Next, the operation of the front loading disc player having the above-described structure will be briefly described with reference to FIGS. 20 to 33. As shown in FIGS. 1 to 3, the upper tray 8 is projected out of the player housing 2 and the compact disc 5 is placed on the upper tray.
(Illustrated in FIGS. 1 and 4). Note that the protruding operation of the upper tray 8 is performed by following the completely reverse process of the storing operation described below, and thus will not be described in detail.

After the compact disk 5 is placed on the upper tray 8, a loading button included in the switch group 13 (shown in FIG. 1) is pressed. Then, the motor 37 (see FIG. 3) is rotated, whereby the pinion 35 is rotated, and the upper rack 29 is moved backward (the direction opposite to the arrow Y direction) as shown in FIGS. 20 and 21. . As a result, the upper tray 8 is housed in the player housing 2 at a speed twice the moving speed of the upper rack 29 by the action of the above-mentioned double speed mechanism as shown in FIGS. 22 and 23. In the state shown in FIG.
No. 0 is in a non-meshing state with the pinion 35 due to the missing tooth portion 30e, so that the lower tray 9 is stationary at the playing position. When the upper rack 29 reaches the position shown in FIG. 21, the cam follower 40 operates, whereby the lower rack 30 is moved forward by a predetermined distance (in the direction of the arrow Y) and meshes with the pinion 35.

Thereafter, the pinion 35 continues to rotate,
The upper rack 29 and the lower rack 30 move as shown in FIGS. Due to the movement of each rack, as shown in FIGS. 28 to 32, the upper plate 23 and the lower plate 24 sequentially turn the turntable 17 and the like along the respective hanging portions and flat portions of the upper guide hole 26 and the lower guide hole 27, respectively. Move while dodging, FIG. 32 and FIG.
As shown in FIG. 3, the upper tray 8 is positioned at the playing position, and the lower tray 9 is positioned at the storage position. The compact disc 5 on the upper tray 8 is placed on the turntable 17 and clamped for playing. However,
The positions of the upper tray 8 and the lower tray 9 are not shown in FIGS. 28 and 29.

The disc clamping operation will be described.
With the movement of the upper rack 29 as described above, the upper plate 23 engaged with the upper rack by the pins 23b moves along the upper guide holes 26. As shown in FIG. 23, at the time of the initial movement of the upward movement of the upper plate 23, the upper plate, which is an engagement member, engages with a roller 58b disposed near the tip of a support member 58 which is a main member of the disk clamp mechanism. And push it upwards. As a result, a sufficient clamping release force is obtained, and the pressing member 59 that has been attracted to the turntable 17 by the magnetic force of the magnet 59a (shown in FIG. 17 (b)) is easily separated from the turntable. Thereafter, as shown in FIGS. 28 to 30, the upper plate 23 is positioned in front of the roller 58b, that is,
8 is engaged with the roller 58c disposed at a portion near the swing center axis and pushes it upward. Therefore, the support member 58 swings upward rapidly. Thus, the clamp of the disc already placed on the turntable 17 is released,
The disc is carried on the lower tray 8 and returned along with the movement of the upper tray 8 and the lower tray 9 described above.

As shown in FIGS. 32 and 33, the upper tray 8 has reached the playing position and the lower tray 9 has reached the storage position by the above operation.
By pressing the eject button for ejecting the lower tray 9, the lower tray 9 protrudes out of the player housing 2, and the disc on the lower tray 9 can be replaced with a new one. At this time, the upper tray 8 is stationary at the playing position, and the performance of the compact disc carried on the turntable 17 by the upper tray can be continued.

As shown in FIGS. 23 and 32, the upper tray 8 and the lower tray 9 are located at the storage positions, respectively.
A photo sensor 71 is provided as detection means for detecting the upper disk. Upper tray 8 and lower tray 9
Is in the playing position, focusing by an optical pickup is performed, so that the presence or absence of a disc on each tray at the playing position can be known.
When each of the trays protrudes out of the player housing 2, the presence or absence of a disc on each of the trays is visually confirmed. Therefore, the presence or absence of the disc on each tray at the playing position, the storing position, and the protruding position can be confirmed only by providing one photosensor 71 described above.

In this embodiment, the upper plate 2
3 and the lower plate 24 are provided with pins 23b, 24b protruding therefrom so as to form each of the mountain-shaped cam grooves 2 of the upper rack 29 and lower rack 30.
9a and 30a, each pin is inserted into the upper guide hole 26.
And it is configured to be moved along the lower guide hole 27,
Further, the rocking member 32 (see FIGS. 11 and 12) prevents the pin from moving backward in each hanging portion included in each guide hole. Not only this configuration but also the configuration shown in FIG. 34 can prevent the pins 23b and 24b from moving backward.

That is, between the first and second hanging portions 26a and 26b included in the upper guide hole 26 and the first flat portion 26c continuous with the first and second hanging portions 26a and 26b, the inclined portions are inclined with respect to the respective hanging portions and the first flat portion. A portion 26f is formed, and between the first and second hanging portions 27a and 27b included in the lower guide hole 27 and the first flat portion 27c connected thereto, the respective hanging portions and the first flat portion are formed. An inclined portion 27f is formed. By providing the inclined portions 26f and 27f, the pins 23
b and 24b smoothly move to the flat portion without going backward in the hanging portion. Further, as shown in the figure, a pair of oscillating members 72 and 73 each having a slidable portion are slidably fitted to each of the pins 23b and 24b, and this is replaced with the aforementioned oscillating member 32. May be used.

[0030]

As described above, according to the present invention, it is possible to selectively drive two driven gears by a single drive source, and to keep the timing of selection switching between the two driven gears constant at all times. Switching with high certainty becomes possible.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a front loading disc player according to the present invention.

FIG. 2 is a plan view of the internal structure of the front loading disc player shown in FIG.

FIG. 3 is a view taken along the line III-III in FIG. 2;

FIG. 4 is a view taken along the line IV-IV in FIG. 2;

FIG. 5 is a view taken in the direction of arrows VV in FIG. 2;

FIG. 6 is a plan view and a bottom view of the tray.

FIG. 7 is a detailed view of components having the internal structure shown in FIGS. 2 to 5;

FIG. 8 is a detailed view of components having the internal structure shown in FIGS. 2 to 5;

FIG. 9 is a detailed view of components having the internal structure shown in FIGS. 2 to 5;

FIG. 10 is a detailed view of components having an internal structure shown in FIGS. 2 to 5;

FIG. 11 is a detailed view of components having the internal structure shown in FIGS. 2 to 5;

FIG. 12 is a detailed view of components having an internal structure shown in FIGS. 2 to 5;

FIG. 13 is a detailed view of components having an internal structure shown in FIGS. 2 to 5;

FIG. 14 is a detailed view of components having an internal structure shown in FIGS. 2 to 5;

FIG. 15 is a detailed view of the components having the internal structure shown in FIGS. 2 to 5;

FIG. 16 is a detailed view of components having the internal structure shown in FIGS. 2 to 5;

FIG. 17 is a detailed view of the components having the internal structure shown in FIGS. 2 to 5;

FIG. 18 is a detailed view of the components having the internal structure shown in FIGS. 2 to 5;

FIG. 19 is a detailed view of components having an internal structure shown in FIGS. 2 to 5;

FIG. 20 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 21 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 22 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 23 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 24 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 25 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 26 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 27 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 28 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 29 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 30 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 31 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 32 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 33 is a view for explaining the operation of the front loading disc player shown in FIGS. 1 to 19;

FIG. 34 is a view showing a modification of a part of the front loading disc player.

FIG. 35 shows a conventional example.

[Explanation of symbols]

 2 Player housing 3a Disk supply port 5, 6 Disk 8 Upper tray 9 Lower tray 15 Vertical chassis (guide member) 17 Turntable 20 Carriage 23 Upper plate 24 Lower plate 26 Upper guide 26a, 27a First hanging part 26b, 27b Second Hanging portions 26c, 27c First flat portion 26d, 27d Tray projecting second flat portion 27 Lower guide (driven gear) 29 Upper rack 29a, 30a Mountain-shaped cam groove 29b, 29c, 30b, 30c Slant portion 29e, 30e Missing part 30 Lower rack (driven gear) 32 Swinging member 33 Cam member 35 Pinion (driving gear) 37 Motor 40, 65, 66 Cam follower 53 Movable carrying member 54 Guide member 56 Interlocking member 58 Supporting member 59 Pressing member 59a Magnet 61, 62, 63 Intellectual switch 71 photosensor

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-64129 (JP, U) JP-A 62-67385 (JP, U) JP-A 60-80553 (JP, U) JP-A 63-67 32331 (JP, U)

Claims (1)

(57) [Claims] The two driven gears (2) that can move within a range including a meshing position where the driving force is transmitted and a non-meshing position where the driving force is not transmitted and a non-meshing position where the driving force is not transmitted.
9, 30) and an interlocking mechanism (29f, 30f, 40) that moves the other driven gear in conjunction with the movement of one driven gear,
The interlocking mechanism moves the other of the driven gears at the meshing position from the non-meshing position to the meshing position in conjunction with the movement of one of the driven gears, and the two driven gears are both at the meshing position. A gear driving mechanism, wherein the one is moved from the meshing position to the non-meshing position in conjunction with the movement of the other moved to the meshing position.