JPH102397A - Intermittent transmission gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a shock between the rotation and the stop of a driven member by providing a cam groove formed in a driving mem ber and a driven pin which is formed on a driven gear and guided by the cam groove. SOLUTION: A speed change part 43 of a cam groove 39 is formed by a groove like an easement curve for gradually increasing and decreasing the speed of a guided driven pin 40. When the driven pin 40 is guided to a stop part 41 and then guided by the speed change part 43, a driven gear 38 is rotated while being accelerated. Simultaneously with the change to the state of releasing the engagement of the driven gear 38, a driven pin 40 is guided by the speed change part 43, and the rotation of the driven gear 38 is gradually decelerated and stopped. Thus, the generation of a shock between the rotation and the stop of the driven gear can be prevented. Further a cam groove that is to be formed highly accurately is only a part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent transmission. More specifically, the present invention relates to an intermittent transmission using a toothless gear and a cam.

[0002]

2. Description of the Related Art An intermittent transmission is an apparatus for intermittently rotating a driven member by a driving member that rotates at a constant speed or slides at a constant speed. The intermittent transmission device includes an intermittent gear device, a ratchet device, a Geneva gear device, a cam device, and the like.

[0003]

However, in the above-described intermittent gear device, ratchet device, and Geneva gear device, when the driven member changes from the stopped state to the rotating state, and when the driven member changes from the rotating state to the stopped state, The driven member collides with the driving member. Therefore, when the driving member is rotated at a high speed, noise may be generated between the driven member and the driven member, or the life of the driven member and the driving member may be shortened. Also, due to the rebound of the collision part, poor engagement of gears etc. occurs,
There is a possibility that smooth rotation may be hindered.

In a ratchet device and a Geneva gear device,
It is extremely difficult to continuously rotate the driven member by 360 degrees or more. Further, in the ratchet device, it is impossible to reversely rotate the driven member by reversely rotating the driving member.

On the other hand, although the cam apparatus can suppress these inconveniences, the number of parts increases and the machining of the cam requires high precision as compared with other intermittent transmissions, so that the manufacturing cost of the intermittent transmission is increased. Will rise.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an intermittent transmission device which does not generate an impact between rotation and stop of a driven member and can be manufactured at low cost.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, an invention according to a first aspect of the present invention is directed to an intermittent motor having a driving member having a tooth portion and a toothless portion, and a driven gear engaged with the driving member and intermittently rotating. The transmission device includes a cam groove formed in the driving member, and a driven pin formed in the driven gear and guided by the cam groove, and the cam groove is provided when the driven gear and the tooth portion of the driving member do not mesh with each other. It is composed of a stop portion where the driven pin is guided, a rotating portion through which the driven pin passes when the driven gear meshes with the tooth portion, and a groove having a relaxed curve connecting both ends of the stopping portion and both ends of the rotating portion. And a transmission unit.

[0008] In the present specification, the term "relaxation-shaped groove" refers to
The groove means a shape in which the speed of the follower guided in this groove in the displacement direction gradually increases and decreases. That is, when two cam grooves having different radii of curvature are connected by a groove having a relaxed curve shape, the speed in the displacement direction of the follower guided from one cam groove to the other cam groove is set in one cam groove. Is gradually changed from the speed in the displacement direction to the speed in the displacement direction in the other cam groove.

Therefore, according to the first aspect of the present invention, when the driven gear does not mesh with the tooth portion of the driving member, the driven pin is guided by the stop portion of the cam groove, and the driven gear stops, swings, or the like. Perform a predetermined operation. Then, immediately before the driven gear meshes with the teeth of the driving member, the driven pin is guided to the transmission portion of the cam groove. Accordingly, the driven gear is rotated while being gradually accelerated, and when meshing with the teeth, the moving speed of the teeth and the peripheral speed of the driven gear are made substantially equal. For this reason, the driven gear meshes without giving an impact to the teeth of the drive member.

Immediately after the driving member is further rotated to separate the driven gear and the tooth portion, the driven pin is located at the transmission. When the driven pin is guided by the transmission, the driven gear is gradually decelerated. Then, when the driven gear almost stops, the driven pin reaches the stop.
Therefore, the driven gear is stopped without generating an impact between the driven pin and the stop.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on an example of an embodiment shown in the drawings.

As shown in FIG. 1, the intermittent transmission 36 is
It has an internal gear 37 as a drive member having a tooth portion 37a and a missing tooth portion 37b, and a driven gear 38 meshed with the internal gear 37 and intermittently rotating. The intermittent transmission 36 is provided with a cam groove 39 formed in the internal gear 37.
And a driven pin 40 formed on the driven gear 38. The driven pin 40 is fitted in the cam groove 39. Further, the cam groove 39 is provided between the driven gear 38 and the internal gear 3.
7, a stop portion 41 through which the driven pin 40 is guided when the toothed portion 37a is not engaged, a rotating portion 42 through which the driven pin 40 passes when the driven gear 38 is engaged with the toothed portion 37a,
There is provided a transmission section 43 formed of a groove having a relaxed curve connecting both ends of the stop section 41 and both ends of the rotating section 42.

The driven pin 40 is formed near the outer periphery of the side surface of the driven gear 38 on the side of the internal gear 37. Driven gear 3
8 and the driven pin 40 are integrally formed of plastic. However, it is not limited to integral molding with plastic,
The driven gear 38 may be made of plastic and the driven pin 40 may be made of metal, and the driven pin 40 may be press-fitted into the driven gear 38.

The cam groove 39 is provided for the driven gear 3 of the internal gear 37.
It is formed on the side surface on the eight side. Rotating part 42 of cam groove 39
Is formed on a locus (indicated by a dashed line in the figure) drawn by the driven pin 40 when the driven gear 38 meshes with the tooth portion 37a. That is, the rotating portion 42 is a groove having an inner cycloid curve shape.

Also, both end portions 42a, 42 of the rotating portion 42
The portion other than a is formed sufficiently wider than the locus through which the driven pin 40 passes. A bottom portion 44 having a depth equal to the bottom surface of the cam groove 39 is formed from the wide portion to the tooth portion 37a. Therefore, when the driven pin 40 is located at both end portions 42a of the rotating portion 42,
The driven pin 38 is rotated by the guide of the driven pin 40 to the rotating part 42 and the engagement between the driven gear 38 and the tooth portion 37a. When the driven pin 40 is located at the center of the rotating part 42, the driven pin 40 is not guided by the rotating part 42, and the driven gear 38 is rotated only by the meshing between the driven gear 38 and the tooth 37a.

The stop 41 of the cam groove 39 is
, And has a circular arc-shaped groove extending about a half circumference around the rotation shaft 45, and the radius of the circular arc is substantially half the length of the radius of the internal gear 37. When the driven gear 38 and the tooth portion 37a do not mesh with each other, the stop portion 41 is
Is formed in the portion where is located. Therefore, when the driven pin 40 is guided to the stop portion 41, the internal gear 37
, The driven gear 38 does not rotate.

In the present embodiment, the stop portion 41 is formed in an arc shape, but the present invention is not limited to this, and the stop portion 41 may have a shape deformed in the radial direction of the internal gear 37. in this case,
Since the driven pin 40 is moved in the radial direction of the internal gear 37 by the stop portion 41, the driven gear 38 is swung. Thereby, the rotation pattern of the driven gear 38 by the intermittent transmission 36 can be further diversified. In addition, the stopping part 4
When the internal gear 1 has a shape deformed in the radial direction of the internal gear 37, the maximum swing angle of the driven gear 38 is preferably set to about ± 30 degrees.

The transmission portion 43 of the cam groove 39 connects both ends of the stop portion 41 and both ends of the rotating portion 42, as indicated by hatching in FIG. The speed change portion 43 is formed of a curved groove in which the speed of the driven pin 40 to be guided gradually increases or decreases, that is, a groove having a relaxed curve. Here, as the relaxation curve, for example, a secondary parabola, a tertiary parabola, a clothoid curve, a sine wave line, a single arc, or the like can be used, but it is particularly preferable to use a tertiary parabola or a clothoid curve. For example, when a tertiary parabola is used, as shown in FIG.
Displacement r 0 is indicated by the third order parabola, the velocity v _r is represented by a quadratic parabola, its acceleration a _r is represented by a linear proportional. For this reason, when the driven pin 40 is guided by the transmission 43, the acceleration applied to the driven pin 40 from the transmission 43 changes gradually, so that the occurrence of an impact is prevented.

In this embodiment, the number of teeth of the tooth portion 37a is slightly smaller than the number of teeth of the driven gear 38. The number of teeth is determined by the angle at which the driven gear 38 is rotated by the teeth 37 a when the driven pin 40 is located at the rotating part 42 and the driven gear 38 when the driven pin 40 is located at the transmission parts 43, 43. The angle rotated by the cam groove 39 is set to be 360 degrees in total. Thus, the driven gear 38 makes one intermittent rotation while the internal gear 37 makes one rotation. However, the number of rotations of the driven gear 38 is not limited to one rotation, and the number of teeth of the driven gear 38 and the tooth portion 37a may be set so as to be two rotations or more, a half rotation, or the like.

Further, the phase of the tooth portion 37a is set so that the driven gear 38 meshes as it is when the driven pin 40 moves from the transmission portion 43 to the end portion 42a of the rotating portion 42.

FIGS. 2 to 11 show how the driven gear 38 is intermittently rotated by the above-described intermittent transmission device 36 while the internal gear 37 makes one rotation. In each figure, the internal gear 37 and the driven gear 38 are rotated clockwise as indicated by arrows.

As shown in FIGS. 2 and 3, the driven pin 40
Is guided by the stop portion 41, the stop portion 41 has an arc shape concentric with the internal gear 37 and the driven gear 38 is located at the toothless portion 37b, so that the driven gear 38 does not rotate. Then, as shown in FIG. 4, when the driven pin 40 is guided by the transmission 43, the driven pin 40 is moved in the radial direction of the internal gear 37, so that the driven gear 38 is rotated while accelerating. . Further, as shown in FIG.
When the driven pin 40 passes through the transmission 43 and reaches one end 42a of the rotating part 42, the driven gear 38 and the tooth 37a are engaged. Here, since the peripheral speed of the driven gear 38 is made equal to the peripheral speed of the tooth portion 37a by passing the driven pin 40 through the transmission portion 43, the meshing between the driven gear 38 and the internal gear 37 may be an impact. Without any problems. In addition, since the phase is set so that the driven gear 38 and the tooth portion 37a mesh with each other, the tips of the teeth do not collide with each other and hinder smooth rotation.

As shown in FIGS. 6 to 9, the driven gear 38 is rotated by meshing with the teeth 37a. At this time, the driven pin 40 moves on the inner cycloid curve, but since the rotating part 42 is formed in the inner cycloid curve, the rotation of the driven gear 38 is caused by the contact between the driven pin 40 and the rotating part 42. There is no hindrance. In addition, since the central portion of the rotating portion 42 has a sufficiently large groove width than the driven pin 40, the driven pin 40
No contact with 9. Further, as shown in FIGS. 10 and 11, at the same time as the driven gear 38 changes from a state in which the driven gear 38 meshes with the end of the tooth portion 37 a to a state in which the meshing is released,
The driven pin 40 is guided from the other end portion 42 a of the rotating portion 42 to the transmission portion 43. Thus, the rotation of the driven gear 38 is gradually reduced. Then, as shown in FIG. 2, the driven pin 40 is again positioned at the stop portion 41. Here, since the driven pin 40 is almost stopped by passing through the transmission unit 43, the driven pin 40 reaches the stop unit 41 without generating an impact. Further, the driven pin 40 is guided by the stopping portion 41, so that it is reliably stopped. In addition, by adjusting the groove width of the stop portion 41, the backlash when the driven gear 38 stops can be set to a minimum.

As described above, while the internal gear 37 makes one rotation, the driven pin 40 is guided in the order of the stop part 41 → the transmission part 43 → the rotation part 42 → the transmission part 43 → the stop part 43. Of these, the driven pin 40 is connected to the rotating section 42 and the transmission sections 43, 43.
, The driven gear 38 is rotated.

In the above-described series of operations, the internal gear 37 is rotated clockwise in each figure as shown in FIGS. 2 to 11, but may be rotated in the opposite direction. Also in this case, the driven pin 40 reaches the rotating part 42 from the stop part 41 via the transmission part 43, and at the same time, the driven gear 3
8 meshes with the tooth portion 37a, and the driven pin 40 is again positioned at the stop portion 41 from the rotating portion 42 via the transmission portion 43. Therefore, the intermittent transmission 36 is operated regardless of the rotation direction of the internal gear 37. The rotation direction of the driven gear 38 is the same as the rotation direction of the internal gear 37.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.

For example, in this embodiment, the intermittent transmission 36
Although the driving member is the internal gear 37, the present invention is not limited to this, and the driving member may be the external gear 37 '. In this case, as shown in FIG. 12, a fan-shaped cam groove plate 46 extending substantially 180 degrees is formed around the toothless portion 37b 'of the external gear 37'. Then, a cam groove 39 is formed on the side surface of the cam groove plate 46 on the driven gear 38 side. When the external gear 37 'and the driven gear 38 mesh with each other, the rotating portion 42 of the cam groove 39
0 is formed on the locus of the outer cycloid curve passing through. The other parts are the same as those in the case where the internal gear 37 is used as the driving member, so that the same reference numerals are used and the description is omitted.

Accordingly, even with the intermittent transmission 36 in which the driving member is an external gear 37 ′, the driven pin 40 reaches the rotating part 42 from the stop part 41 via the transmission part 43, and at the same time, the driven gear 38 and the external tooth The gear 37 'meshes with the driven pin 40, and the driven pin 40 is again located at the stop portion 41 from the rotating portion 42 via the transmission portion 43.

The drive member of the intermittent transmission 36 may be a rack 37 ". In this case, as shown in FIG. 13, a cam groove plate 47 is formed on the tooth side of the rack 37" along the longitudinal direction. I do. The driven gear 3 of the cam groove plate 47
A cam groove 39 is formed on the side surface on the eight side. The rotating portion 42 of the cam groove 39 is formed on a locus of a cycloid curve through which the driven pin 40 passes when the rack 37 "meshes with the driven gear 38. Further, the rack 37" and the cam groove 39.
Is provided only for one rotation of the driven gear 38 and is used by reciprocating it. However, the present invention is not limited to this, and the rack 37 "and the cam groove 39 may be formed continuously for a plurality of rotations of the driven gear 38, and may be moved. 37, the same reference numerals are used and the description is omitted.

Therefore, even with the intermittent transmission device 36 in which the driving member is a rack 37 ", the driven pin 40 reaches the rotating portion 42 from the stop portion 41 via the transmission portion 43, and at the same time, the driven gear 38 and the driving gear are connected. Mesh with the driven pin 4
0 is located at the stop portion 41 again from the rotating portion 42 via the transmission portion 43.

Here, an embodiment in which the intermittent transmission device 36 using the internal gear 37 shown in FIG. 1 of the present embodiment is applied to a disk changer of a type accommodating three disks is shown. The application target of the intermittent transmission device 36 is not limited to the disc changer, but may be applied to other uses.

As shown in FIGS. 14 to 47, this disc changer comprises three carriages 1, 1, 1 on which the disc 7 is mounted, and three carriages 1, 1, 1
The tray 2 accommodates two of them and reciprocates between a disk take-out position 8 and a disk storage position 9, and is disposed at a drive position 10 on the back side of the apparatus with respect to the disk storage position 9 to record / reproduce a disk. A disk drive 3 to perform;
The one carriage 1 and the disk 7 thereon are moved up and down with respect to the disk drive 3 to the disk drive loading position 11 or the disk non-loading position 12 at the same level as the lowest carriage 1 in the disk storage position 9. A disk setting mechanism 4 for moving; a carriage elevating mechanism 5 for elevating the carriage at the disk storage position 9 and the drive position 10 between the disk non-loading position 12 of the disk setting mechanism 4 and a position higher than the disk loading position 12; The operation of the carriage elevating mechanism 5 allows the disk storage position 9
Alternatively, a carriage moving mechanism 6 for moving the carriage to the spaces S1 and S2 formed at any of the drive positions 10 is provided.

As shown in FIG. 33, the carriage 1 is made of, for example, a plastic thin plate having a substantially square planar shape, and has a concave portion 13 for mounting the disk 7 at the center thereof. It is provided to be. The recess 13 is a large recess 1 for accommodating a 12 cm disc.
3a and a small recess 13b for accommodating an 8 cm disk are formed concentrically. As shown in FIG.
As shown in FIG. 3 and FIG. 34, teeth 14 projecting laterally at a constant pitch are integrally formed. These teeth 14 correspond to a rack, but are provided so that a pin 16 of a pin gear 15 can pass through the portion except for a portion corresponding to a tooth bottom in a vertical direction. The carriage 1 has a through hole 17 through which the optical pickup 3 serving as a disk drive passes from the center of the concave portion 13 to the front side of the apparatus. Further, notches 18 are provided on both sides of the carriage 1 on the inner side of the apparatus. The notch 18 is provided in the clamper 1 located above the carriage 1.
9 to pass through a column portion of a clamper arm 20 that supports the clamper 9.
The disc changer is provided so as to be able to fit in the size of two carriages 1 as a whole.
The carriage 1 is disposed at the disk storage position 9 in a state where two carriages are stacked, and one carriage is disposed at the disk loading position 11 or the non-loading position 12 of the drive position 10 at the back of the apparatus.

In the case of the present embodiment, the tray 2 accommodates two carriages 1 and reciprocates between a disk take-out position 8 and a disk storage position 9 by a drive motor and a rotation transmission system (not shown). Star gears 22 and 31 having a wide tooth width are provided on the front and rear sides of the tray at the drive position 10, and a pin gear 15 is provided at the boundary between the disk storage position 9 and the drive position 10. . As shown in FIGS. 44 and 47, the tray 2 has two carriages 1 and 2 at the disk storage position 9.
1, a side support 21a for supporting the edge of the lower carriage 1 and a front support 2 for supporting the leading edge of the carriage 1.
1b. Since the two carriages 1, 1 stacked are supported by the pedestals 21a, 21b and the star gear 22, respectively, they can be moved separately. Then, after the two carriages 1, 1 stacked in the disk storage position 9 are drawn out to the disk take-out position 8 by driving the tray 2, only the upper carriage 1 is pulled into the apparatus by the rotation drive of the pin gear 15. Then, the disk 7 placed on the lower carriage 1 is exposed. Therefore, the lower carriage 1
Can be exchanged for the disk 7 accommodated in the storage device.
The movement (horizontal movement) of the carriage 1 toward the inner side of the apparatus is performed using the tooth surfaces 22a, 31a of the star gears 22, 31 as rails.

At the center of the rear carriage 1, an optical pickup 3 as a disk drive is installed.
The optical pickup 3 is fixed to the apparatus frame 23, and the loading and unloading of the disk 7 is performed by raising and lowering the disk 7, the carriage 1 on which the disk 7 is mounted, and the clamper 19.

The clamper 19 for fixing the disk 7 to the optical pickup 3 is made of, for example, a cylindrical body having flanges at both ends, and the upper and lower flanges are used for a large C-shaped hole 24 at the tip of the clamper arm 20. Supported so as to be able to move slightly in the vertical and horizontal directions.
Although not shown, the clamper arm 20 is provided so as to be able to move up and down by driving a motor or the like. The clamper arm 20 is formed by, for example, fitting guide ribs 35 of the clamper support arm 20 into guide rails 34 arranged on both sides of the device frame 23 as shown by phantom lines in FIG. 33 and as shown in FIG. , Are supported so as to be able to move up and down along the groove of the guide rail 34. Also,
The clamper 19 has an iron plate (not shown) that is attracted to a magnet embedded in the hub 25 of the pickup main body 3.
When the disk 7 is inserted into the portion 5, the disk 7 is attracted to the hub 25 and the disk 7 is held between the hub 25 and the turntable. Of course, depending on the type of the optical pickup, a magnet may be arranged on the clamper 19 side so that the hub 25 of the pickup 3 is attracted. When descending, the clamper arm 20 contacts the edge of the carriage 1 supported by the lifter 26 at the disc non-loading position 12 and pushes down the carriage 1 together with the lifter 26 while the hub 2 of the disc drive 3
The disk 7 fitted in the five portions is sandwiched and fixed by the clamper 19.

A return spring 27 for pushing up the lifter 26 is provided between the lifter 26 and the apparatus frame 23. The spring 27 is a U-shaped spring whose both ends are raised in comparison with the center. Both ends are fitted into the groove 28 of the lifter 26 and the center is pressed against the apparatus frame 23. On the other hand, the lifter 26 is almost entirely engaged with the guide pins 30 at both ends in the oblique guide grooves 29 provided in the device frame 23 without being twisted due to the pushing up by the spring 27 and the pushing down by the clamper arm 20. It is provided so as to be able to move up and down within the range of the guide groove 29 while maintaining a horizontal state. The lifter 26, the clamper arm 20 and the return spring 27 constitute the disc setting mechanism 4.

The carriage elevating mechanism 5 includes star gears 22 and 31 having long tooth widths arranged on the front side and the back side of the tray 2 and a driving source (not shown) for rotating the gears.
The teeth 14 on both sides of the carriage 1 are hooked by star gears 22 or 31 to support substantially the center of the carriage 1 and to be raised or lowered by the rotation of the star gears 22 and 31. I have. Star gear 2
2, 31 has a tooth width of about half the length of the carriage 1, and the star gears 22, 22, or 31, 3 on both sides.
1 so that the carriage 1 can be supported therebetween. The star gears 22, 31 are provided at positions supporting the central portions of the respective carriages 1, 1 at the disk storage position 9 and the drive position 10. The star gears 22 and 31 are provided so that they can be driven to rotate separately.

The carriage moving mechanism 6 includes star gears 22 and 31 disposed on the front side and the rear side of the tray 2, respectively.
And a pin gear 16 disposed at the boundary between the two gears. The pin gear 16 and the teeth 14 on both sides of each carriage 1 are engaged with each other, and the carriage 1 is rotated by the rotation of the pin gear 15 to form the star gears 22 and 31. Is provided so as to move on the tooth surface. The carriage 1 when moving from the near side to the far side of the tray 2 is supported by the lower carriage 1 or the receiving table 21 a or the lifter 26 on both sides of the tray 2. The tray 2 is provided with a rack, for example,
The motor can be driven in and out freely.

Further, as shown in FIG. 14, the rotating mechanism of each pin gear 15, 15 is connected to the intermediate gears 48, 48 meshed with each pin gear 15, 15, and the intermediate gears 48, 48. Intermittent transmissions 36, 36, a large gear 49 for driving the intermittent transmissions 36, 36, a worm wheel 50 meshed with the large gear 49, a worm 51 meshed with the worm wheel 50, and the worm And a motor (not shown) for rotating 51. In the figure, a gear meshing with the left side of the large gear 49 performs power transmission for driving a rotation mechanism of each pin gear on the opposite side (not shown).

When the motor rotates, the worm 51 rotates and the worm wheel 50 rotates. Then, the large gear 49 is rotated, and the two intermittent transmissions 36, 36 connected thereto are driven. As a result, the internal gears 37, 37 in which the external gear portions 37c, 37c mesh with the large gear 49 are rotated, and the driven gears 38, 38 are intermittently rotated. Here, the rotation timing of each of the driven gears 38 is set such that the driven gears 38 rotate one by one. That is, the two driven gears 38, 38 do not rotate simultaneously. And each driven gear 38,
38 rotates through each intermediate gear 48, 48 and each pin gear 1
5 and 15. For this reason, each pin gear 15, 1
The rotation direction of No. 5 is the same.

In the intermittent transmission device 36, the driven gear 38 makes one intermittent rotation while the internal gear 37 makes one rotation. And, while the driven gear 38 makes one rotation,
The pin gear 15 is rotated a plurality of times to move each carriage 1 by a predetermined distance.

According to the disk changer configured as described above, the operation is as follows.

First, the operation of replacing a playing disk will be described with reference to FIGS. In FIG. 15, the disk 1 is clamped on the turntable of the disk drive 3 so that it can be played, and the carriage 1 is located below the disk 1. At this time, the other second and third disks 7 are stored in the respective carriages 1 and 1 and are stocked on the disk storage position 9 on the front side of the tray and on the front side of the apparatus. This is the play mode. In this state, when the disc selection key [DISC2] is pressed to replace the disc 1 at the playing position with another stocked disc, for example, the second disc 7, the lifter 26 and the clamper 19 are raised and the disc 7 is moved. The carriage 1 is released and the carriage 1 is raised to the height of the third carriage 1. The clamper 19 is lifted by the motor drive of the clamper arm 20, and the lifter 26 is lifted by the spring force of the return spring 27. As a result, the disk 7 is separated from the turntable and fits in the carriage 1 (see FIG. 16). In the case of replacement with the third disk 7, the carriage 1 is lifted to the position of the carriage 1 in which the second disk 7 fits.

Next, the clamper 19 further moves up to the top. The change mode is now set (Fig. 1
7). A selected one of the second and third disks 7, 7 stocked in the disk storage position 9 on the front side of the tray 2, that is, the carriage 1 in which the second disk 7 is stored in this example. Moves horizontally toward the space S2 at the drive position 10 on the back side of the apparatus (see FIG. 18), and the first
Move to a position directly above the first carriage 1 in which the disc 7 is stored. Then, the second carriage 1 rides on the first carriage 1. (See FIG. 19).

Thereafter, the third carriage 1 is moved up to the space S1 where the second carriage 1 was located by driving the carriage lifting mechanism 5 at the disk storage position 9 (see FIG. 20). Then, the third carriage 1
Is the same height as the second carriage 1 (see FIG. 21). Thereafter, the first carriage 1 is moved to the disk storage position 9 in front of the apparatus by driving the carriage moving mechanism 6 (see FIG. 22). Then, the first carriage 1 enters under the third carriage 1 (see FIG. 23). Thereafter, the second carriage 1 at the drive position 10 starts descending (see FIG. 24), and descends until it reaches the same height as the first carriage 1 (see FIG. 25). Second carriage 1
Is lowered by driving the carriage lifting mechanism 5 at the drive position 10. This ends change mode.

Further, when the clamper arm 20 descends, the clamper 19 descends and the lifter 26 is pushed down (see FIG. 26).

The second carriage 1 and the lifter 26 are lowered together with the clamper 19, and the second disk 7 is clamped on the turntable. Thus, the mode is changed to the play mode again, and the exchange of the disk is completed (see FIG. 27). When changing from the first disk 7 to the third disk 7, the first carriage 1 receiving the first disk 7 from the disk drive 3 does not stop in the state of FIG.
, And then moves in the order of FIG. 22 → FIG. 21 → FIG. 20 → FIG. 19 → FIG. 18 → FIG. 17 (FIG. 25) → FIG. 26 → FIG. 27, and the carriage moves counterclockwise.

Next, the second, which is stocked on the near side,
The operation of taking out the third disk 7 and replacing it during a performance or the like will be described. FIG. 28 shows the same state as FIG. Here, the operation key [OPE
N], the tray 2 pops out by the motor drive (see FIG. 29), and the tray 2 is fully opened (see FIG. 30). Thus, the second disk 7 can be taken out. If [CLOSE] is pressed here, the tray 2 is pulled into the apparatus and returns to the state of FIG. To remove the third disk 7, when [OPEN] is pressed again, the pin gear 15 of the carriage moving mechanism 6 in the upper row is pressed.
Rotates to move the second carriage 1 onto the star gear 31 on the back side of the tray. At this time, the second carriage 1
Moves on the tooth surfaces of the star gear 22 on the front side of the tray and the star gear 31 on the rear side of the tray.

Thus, the upper part of the third carriage 1 is opened, and the third disk 7 can be taken out. When [CLOSE] is pressed here, the pin gear 15 of the carriage moving mechanism 6 in the upper row rotates again in the opposite direction to the above, pulls the second carriage back toward the tray, and returns to the state of FIG.

The above embodiment is a preferred embodiment of the present invention, but the present invention is not limited to this embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in this embodiment, three disks can be exchanged. However, the present invention is not particularly limited to this, and two, four, or more disks can be stocked. However, when storing about three discs, it is possible to provide a disc changer that is simplest in structure, inexpensive, low in height, and small overall. Furthermore, in the present embodiment, the disc is not particularly limited to a CD, and other recording media such as a CD-ROM and an MO can be reproduced.

[0052]

As is apparent from the above description, the present invention has a cam groove formed in the driving member and a driven pin formed in the driven gear, and the cam grooves are formed at both ends of the stop portion and at the rotating portion. Since it has a transmission portion formed of a groove having a relaxed curve connecting both ends, the driven pin is guided by the transmission portion immediately before the driven gear meshes with the tooth portion. The relative speed almost disappears, and the driven gear and the teeth are meshed without any impact. Also, immediately after the driven gear and the tooth part are separated, the driven pin is guided to the transmission unit, the relative speed of the driven pin and the stop in the groove width direction is almost zero, and the driven pin does not give an impact to the stop. be introduced. For this reason, it is possible to prevent the generation of noise due to the impact between the rotation and the stop of the driven gear, and to prolong the life of the intermittent transmission.

The rotating portion of the cam groove is formed so that the driven pin passes when the driven gear meshes with the tooth portion, so that it is not necessary to form the rotating portion with high precision. For this reason, only a part of the cam groove to be formed with high accuracy is sufficient, so that the intermittent transmission can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment in which a drive member of an intermittent transmission of the present invention is an internal gear, (A) is a front view,
(B) is a side view cut along the II line of (A).

FIG. 2 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin is guided to a stop.

FIG. 3 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin is guided to a stop.

FIG. 4 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin is guided to a transmission unit.

FIG. 5 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin is guided by a rotating unit.

FIG. 6 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin passes through a rotating part.

FIG. 7 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin passes through a rotating part.

FIG. 8 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin passes through a rotating part.

FIG. 9 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin passes through a rotating part.

FIG. 10 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin passes through a rotating part.

FIG. 11 is a view showing one embodiment of the intermittent transmission of the present invention, and shows a state in which a driven pin is guided to a transmission unit.

FIG. 12 is a diagram showing an embodiment in which a drive member of the intermittent transmission of the present invention is an external gear, (A) is a front view,
(B) is the side view cut | disconnected by the XII-XII line of (A).

FIG. 13 is a view showing one embodiment in which the drive member of the intermittent transmission of the present invention is a rack, (A) is a front view,
(B) is a side view.

FIG. 14 is a schematic diagram showing a rotation mechanism of a pin gear.

FIG. 15 is a schematic diagram showing an embodiment in which the intermittent transmission of the present invention is applied to a disc changer, and shows a play mode state.

FIG. 16 is a schematic diagram showing an embodiment of a disk changer, showing a state in which a disk is being removed from a disk drive for disk replacement.

FIG. 17 is a schematic diagram showing one embodiment of a disk changer, showing a state where a disk is removed from a disk drive for disk replacement.

FIG. 18 is a schematic view showing an embodiment of a disk changer, showing a state where a carriage is moved from a disk storage position to a drive position for disk replacement.

FIG. 19 is a schematic view showing an embodiment of a disk changer, showing a state where a carriage is moved from a disk storage position to a drive position for disk replacement.

FIG. 20 is a schematic view showing an embodiment of a disk changer, showing a state in which a carriage below a disk storage position is moved to an empty space above for disk replacement.

FIG. 21 is a schematic view showing an embodiment of a disk changer, showing a state in which a carriage below a disk storage position has been moved to a space opened above for disk replacement.

FIG. 22 is a schematic view showing an embodiment of a disk changer, showing a state in which a carriage containing a disk mounted on a disk drive up to now is moved from a drive position to a disk storage position for disk replacement.

FIG. 23 is a schematic view showing an embodiment of a disk changer, showing a state in which a carriage containing a disk mounted on a disk drive up to now is moved to a disk storage position from a drive position for disk replacement.

FIG. 24 is a schematic view showing an embodiment of a disc changer, showing a state where a carriage containing a selected disc is moved to an empty space on the disc drive.

FIG. 25 is a schematic view showing one embodiment of a disc changer, showing a state where a carriage containing a selected disc is moved to an empty space on the disc drive.

FIG. 26 is a schematic view showing an embodiment of a disc changer, showing a state in which a clamper arm is lowered to move a clamper toward a disc drive.

FIG. 27 is a schematic view showing an embodiment of a disc changer, showing a state where a carriage and a lifter are lowered by a clamper arm and a disc is loaded into a disc drive.

FIG. 28 shows the disc changer in the play mode state.

FIG. 29 shows a state in which a tray is being opened to exchange a disk at a disk storage position during disk reproduction.

FIG. 30 shows a state where a tray is opened to exchange a disk at a disk storage position during disk reproduction.

FIG. 31 shows a state in which the upper carriage is moved to the inner side of the tray in a state where the tray is opened to exchange the disk at the disk storage position during the reproduction of the disk, and the lower carriage is being opened.

FIG. 32 shows a state in which the upper carriage is moved to the inner side of the tray while the tray is opened in order to exchange the disk at the disk storage position during disk reproduction, and the lower carriage is opened.

FIG. 33 is a plan view schematically showing a carriage, a carriage elevating mechanism, and a moving mechanism arranged in a disc changer.

FIG. 34 is an explanatory diagram showing a relationship between a pin gear constituting a carriage moving mechanism and teeth formed on a side edge of the carriage.

FIG. 35 is a schematic explanatory view of a disk setting mechanism, showing a state in which a carriage supported by a lifter is arranged at a disk non-loading position.

FIG. 36 is a schematic explanatory view of the disk setting mechanism, showing a state where the carriage is pushed up from the disk non-loading position to the same position as the carriage below the disk storage position by the lifter.

FIG. 37 is a schematic explanatory view of a carriage elevating mechanism, showing a state in which the carriage pushed up to the same position as the carriage below the disk storage position is further lifted to an upper space by a star gear.

FIG. 38 is a schematic explanatory view of a carriage elevating mechanism, showing a state in which the carriage pushed up to the same position as the carriage below the disk storage position is further lifted to an upper space by a star gear.

FIG. 39 is an explanatory diagram showing the movement of the carriage during disk replacement, showing a state in which the carriage containing the playing disk has moved to the disk loading position.

FIG. 40 is an explanatory diagram showing the movement of the carriage during disk replacement, showing a state in which the carriage has been moved from the disk loading position to the disk non-loading position in order to replace a playing disk.

FIG. 41 is an explanatory diagram showing the movement of the carriage during disk replacement, showing a state in which the carriage containing the disk recovered from the disk drive is moved to a further upper space.

FIG. 42 is an explanatory view showing the movement of the carriage during disk replacement, in which the carriage containing the disk recovered from the disk drive is moved to a further upper space, and is arranged at the same position as the carriage above the disk storage position. Show.

FIG. 43 is an explanatory diagram showing the movement of the carriage during disk replacement, showing a state in which the carriage below the disk storage position containing the selected disk is moved to the space below the carriage containing the disk recovered from the disk drive. Show.

FIG. 44 is a longitudinal sectional view showing an embodiment of the disc changer of the present invention.

FIG. 45 is a sectional view showing a side edge of a carriage of the disc changer of FIG. 44;

FIG. 46 is a transverse sectional view of the drive position of the disc changer of FIG. 44.

FIG. 47 is a cross-sectional view of the disc changer of FIG. 44 at a disc storage position.

FIG. 48 is a graph showing a relationship between displacement, speed, and acceleration of the driven pin with respect to the rotation angle of the transmission when the driven pin is guided by the tertiary parabolic transmission.

[Explanation of symbols]

 36 intermittent transmission device 37 internal gear (drive member) 37 ′ external gear (drive member) 37 ″ rack (drive member) 37a tooth portion 37b toothless portion 38 drive gear 39 cam groove 40 driven pin 41 stop portion 42 rotating portion 43 Transmission

Claims (1)

[Claims] 1. An intermittent transmission having a drive member having a tooth portion and a toothless portion and a driven gear meshing with the drive member and intermittently rotating, wherein a cam groove formed in the drive member and the driven gear A driven pin formed in the cam groove and guided by the cam groove, wherein the cam groove is configured to guide the driven pin when the driven gear and the tooth portion of the driving member do not mesh with each other, A rotating portion through which the driven pin passes when the driven gear meshes with the tooth portion;
An intermittent transmission, comprising: a transmission portion formed of a groove having a relaxed curve connecting both ends of the stop portion and both ends of the rotating portion.