JPH0991810A - Recording medium loading mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a power loading without increasing the number of motors in a tape cassette loading mechanism. SOLUTION: Loading is performed by the driving force of a capstan motor 2 through a capstan gear 7 and cam gears 8 and 18. The cam gear 8 is stopped so that a toothless part 13 may be opposed to the capstan gear 7 in the initial state. When an ejecting lever 22 is turned, preventing the cam gear 8 from rotating is released, and the cam gears 8 and 18 are rotated, so that a cassette holder 50 is operated to be opened/closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a recording medium loading mechanism for mounting a recording medium such as a tape cassette or a disk cartridge on a recording / reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, recording media for information signals such as tape cassettes and disk cartridges have been proposed. The recording / reproducing apparatus records / reproduces information signals on / from such a recording medium.

The recording / reproducing apparatus has a recording medium loading mechanism for mounting the recording medium on the recording / reproducing apparatus. As this recording medium loading mechanism, there is one having a holder member that is configured to hold the recording medium and is movably attached to the recording / reproducing apparatus.

The holder member is moved and operated with respect to the recording / reproducing apparatus while holding the recording medium, and the recording medium is moved and operated between a mounting position and a discharging position with respect to the recording / reproducing apparatus. .

That is, the holder member takes out and inserts the recording medium at the position where the recording medium being held is at the discharge position, and the recording medium is mounted on the holder member while holding the recording medium. The recording medium is mounted on the recording / reproducing apparatus by being set to the position.

In the recording medium loading mechanism, a so-called power loading mechanism has been proposed, which is configured to move the holder member by a driving force of a motor.

[0007]

By the way, in the recording medium loading mechanism as described above, when the holder member is moved by the driving force of the motor, a dedicated motor for loading operation is used. Is provided.

In the recording / reproducing apparatus, a motor for feeding and operating the recording medium to a head device for recording / reproducing an information signal on / from the recording medium, a motor for moving the head device, etc. Various motors are provided, and providing a motor dedicated to the loading operation on top of this causes the recording / reproducing apparatus to have a complicated structure, a large size, and complicated manufacturing.

Therefore, the present invention has been proposed in view of the above situation, and the structure of the recording / reproducing apparatus is complicated.
An object of the present invention is to provide a recording medium loading mechanism capable of performing a loading operation for mounting a recording medium on the recording / reproducing apparatus by a driving force of a motor without increasing the size and complicating the manufacturing. Is.

[0010]

In order to solve the above problems, a recording medium loading mechanism according to the present invention feeds the recording medium to a head device for recording and reproducing an information signal on the recording medium. And a state in which the toothless portion is opposed to a drive gear that includes a gear portion having a toothless portion, is rotatably supported, and is rotationally operated by the driving force of the motor. A cam gear that is rotated so that the gear portion is meshed with the drive gear, and a rotational force of the cam gear is transmitted to a holder member that holds a recording medium to move the holder member in accordance with the rotation of the cam gear. The transmission mechanism for moving the recording medium held by the holder member between the mounting position and the discharge position, and the rotation of the cam gear so that the rotation can be released, and the cam gear is driven by the toothless portion. A stopper member for holding the cam gear in a position facing the gear, and when the stopper member stops releasing the rotation of the cam gear, the cam gear is urged to rotate to rotate the gear portion. The cam gear is rotatably operated by the driving force of the motor via the drive gear when the gear portion is engaged with the drive gear, and the cam gear is operated via the transmission mechanism. The holder member is moved and the recording medium is moved between the mounting position and the discharging position.

Further, according to the present invention, in the recording medium loading mechanism, a first stopper control member that is moved according to a rotational position of the cam gear and a second stopper control member that is moved together with the holder member. A limiter member which is arranged in the transmission mechanism and which allows the cam gear to continue rotating even if the holder member is stopped by an external force while the cam gear is rotating; and the first stopper. A stopper control mechanism is provided which prohibits the stopper member from returning to the initial position and blocking the rotation of the cam gear depending on the position of the control member and the position of the second stopper control member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the recording medium loading mechanism according to the present invention is used in a tape recorder device which is a recording / reproducing device for recording / reproducing information signals by using a tape cassette as a recording medium. It is configured as.

As shown in FIG. 2, the tape cassette is constructed by housing a magnetic tape 207 wound around a pair of tape reels 203 and 204 in a housing-shaped cassette 202. That is, this tape cassette 201
Is a so-called "compact cassette" (trademark), and is constructed by rotatably housing the pair of tape reels 204 and 203 in a cassette 202 having a rectangular main surface portion. A magnetic tape 207 is wound around one of the tape reels 204. The tip end side of the magnetic tape 207, which is the outer peripheral side of the one tape reel 204, is joined to the other tape reel 203. The portion of the magnetic tape 207 that extends between the tape reels 204 and 203 is located outside the cassette 202 via a magnetic head entry hole and a pinch roller entry hole formed in the front surface of the cassette 202. Facing.

On both front and back main surface portions of the cassette 202,
A pair of reel shaft insertion holes for exposing the central portions of the tape reels 204 and 203 to the outside are provided. These reel shaft insertion holes are provided in the tape reels 20.
Reel shaft engaging hole 20 formed in the central portion of 4,203
6, 205 are exposed to the outside of the cassette 202.

Further, a pair of positioning holes 21 are provided on the front and rear main surface portions of the cassette 202 at the front side portions.
2,213 have been opened. Furthermore, the cassette 2
A pair of capstan shaft insertion holes 210 and 211 are formed in front and back main surface portions of 02 in the front portion.

As shown in FIG. 1, the tape cassette loading mechanism has a chassis 1 arranged in a substantially vertical state. A tape cassette mounting portion is formed on the front surface of the chassis 1. The tape cassette mounting portion is configured so that the tape cassette 201 is positioned and mounted, and recording / reproducing of an acoustic signal with respect to the magnetic tape 207 of the tape cassette 201 can be performed.

A cassette holder 50 serving as a holder member for holding the tape cassette 201 is rotatably attached to the chassis 1. The cassette holder 50 is formed in a housing shape having a size corresponding to the size of the cassette 202 so that the tape cassette 201 can be inserted and operated from the upper side to hold the tape cassette 201. Side is cassette insertion part 5
It is open as 1.

The cassette holder 50 has a pair of left and right support leg portions 52 and 53 protruding downward on both sides. In the lower end side portions of these support leg portions 52, 53,
The supported projections 54 and 55 are provided so as to project outward, respectively. On the other hand, a pair of left and right holder support pieces 58, 60 are provided on the lower portion of the front surface of the chassis 1 so as to project toward the front side. These support pieces 58, 60
The support holes 59 and 61, into which the supported projections 54 and 55 of the cassette holder 50 are fitted, are formed in the respective holes.

In the cassette holder 50, the supported projections 54, 55 are provided in the support holes 5 of the support pieces 58, 60.
Each of the supported projections 5 can be fitted to the corresponding projections 9 and 61.
It is supported so as to be rotatable around 4, 55. That is, the upper end portion of the cassette holder 50 can be brought into contact with and separated from the chassis 1, and the upper end portion is separated from the chassis 1 toward the front side, and the upper end portion is separated from the chassis 1. With respect to the mounting position to be brought closer to, the rotary operation is possible.

When the cassette holder 50 is at the ejection position, the tape cassette 20 from the upper side.
1 operation of inserting the tape cassette 2 toward the upper side
01 take-out operation is possible. Then, as shown by an arrow D in FIG. 1, when the cassette holder 50 is rotated to the mounting position while the tape cassette 201 is housed and held, the tape cassette 2
01 is mounted on the tape cassette mounting portion.

As shown in FIGS. 1 and 2, the tape cassette mounting portion has a pair of positioning pins, a pair of reel shafts 77 and 80, a capstan shaft 6, a pinch roller, which are arranged on the chassis 1. 91, and a recording / reproducing head 90 and an erasing head 89 which are head devices. The recording / reproducing head 90 is used for the tape cassette 201.
Is a magnetic head device for recording / reproducing information signals on / from the magnetic tape 207.

Each of the positioning pins is planted on the chassis 1 and fits into and engages with the pair of positioning holes 213 and 212 formed in the cassette 202.

The capstan shaft 6 is erected at the center of a flywheel 5 which is rotatably arranged on the back side of the chassis 1 and is attached to the chassis 1.
Through the capstan through hole 86 provided in the chassis 1. The flywheel 5 is rotatably supported by the chassis 1 and a frame (not shown) attached to the back surface of the chassis 1.

The flywheel 5 is rotatably operated at a constant rotation speed by the driving force of a capstan motor 2 supported by the frame and arranged on the back side of the chassis 1. That is, between the drive pulley 3 attached to the drive shaft of the capstan motor 2 and the outer peripheral edge of the flywheel 5, as shown in FIGS. 1 and 4,
The drive force of the capstan motor 2 is applied to the flywheel 5
The endless drive belt 4 for transmission to the.

The capstan motor 2 serves as a driving force source for feeding the magnetic tape 207 to the upper recording / reproducing head 90 and the erasing head 89. The capstan motor 2 is always rotationally driven when the main power supply of the tape recorder device is turned on.

The flywheel 5 is provided with a capstan gear (fly gear) 7 located at the base end side of the capstan shaft 6 and serving as a drive gear of the recording medium loading mechanism according to the present invention. The capstan gear 7 is rotated by the driving force of the capstan motor 2 together with the flywheel 5.

The reel shafts 77, 80 are provided on the chassis 1 so as to project toward the front side, and are rotatably supported by the chassis 1. These reel shafts 7
The reel shaft gears 78 and 8 are provided on the base end sides of the reels 7 and 80, respectively.
1 is provided. And these reel shafts 77, 8
0 is driven by the driving force of the capstan motor 2 in accordance with the operation mode selected in the tape recorder device, via the transmission gears 79 and 82 meshed with the reel shaft gears 78 and 81. It is selectively rotated.

A mode switching mechanism having a mode switching cam gear 99 rotatably disposed is provided on the rear side of the chassis 1. In this mode switching mechanism, the operation mode is selected according to the rotational position of the mode switching cam gear 99. That is, this mode switching mechanism is used for the mode switching cam gear 9 described above.
It is selected which reel shaft 77, 80 the driving force of the capstan motor 2 is to be transmitted to, depending on the rotational position of the capstan motor 2, and a head support plate to which an upper recording / reproducing head 90 and an erasing head 89 are attached. 83 is operated to move back and forth with respect to the tape cassette mounting portion.

When the tape cassette 201 is mounted in the tape cassette mounting portion, the reel shafts 77 and 80 are connected to the tape reels 204 and 203 through the pair of reel shaft insertion holes of the cassette 202. The reel shaft engaging holes 206 and 205 are fitted and engaged.

When the tape cassette 201 is mounted on the tape cassette mounting portion of the capstan shaft 6, the capstan shaft 6 is inserted through one of the pair of capstan shaft insertion holes 211 and 210 of the cassette 202, Enter the cassette 202. At this time, the capstan shaft 6
Is the magnetic tape 207 in the pinch roller entry hole.
To the position on the inner side of the cassette 202.

The pinch roller 91 corresponds to the chassis 1
Pinch roller support arm 92 rotatably disposed above
Is rotatably attached to. The pinch roller 91 is contacted with and separated from the capstan shaft 6 by the pinch roller support arm 92 being rotated with the movement of the head support plate 83. In the recording mode and the reproducing mode, the pinch roller 91 is moved to the tape cassette mounting portion side so as to enter the cassette 202 through the pinch roller entrance hole, and to move to the capstan shaft 6. The magnetic tape 207 is sandwiched in cooperation with each other.

Then, in the recording mode and the reproducing mode, the upper recording / reproducing head 90 and the erasing head 89 enter the cassette 202 through the magnetic head entry hole, and erase and delete the acoustic signal to the magnetic tape 207. Write or read.

A first cam gear 8, which is a cam gear, is rotatably arranged on the rear side of the chassis 1. The first cam gear 8 is formed in a substantially disc shape and has a support hole 11 in the center. The first cam gear 8 is
By inserting a support shaft planted in the back surface of the chassis 1 into the support hole 11, the support shaft 11 is rotatable around the support shaft.

A gear portion 9 is formed on the peripheral portion of the first cam gear 8. The gear portion 9 has a toothless portion 13 at one location. The first cam gear 8 has a state in which the toothless portion 13 faces the capstan gear 7 (initial state) and a state in which the gear portion 9 meshes with the capstan gear 7 (operating state). It can be rotated over.

The first cam gear 8 has the toothless portion 13
In the initial state in which is opposed to the capstan gear 7, the driving force is not transmitted from the capstan gear 7, and the torsion coil spring 96 serving as a biasing member disposed on the back surface of the chassis 1 causes , Is urged to rotate in one direction.

The torsion coil spring 96 has a coil portion supported by a support shaft 97 planted on the rear surface of the chassis 1, and one arm portion hooked by the chassis 1.
The other arm portion is pressed against the pressed ridge portion 106 provided on the first cam gear 8. The pressed ridges 106 are provided on the back surface of the first cam gear 8 in a protruding manner, and in the initial state in which the toothless portion 13 faces the capstan gear 7, the torsion coil spring 96 is pressed. The other arm portion is pressed in a direction deviated from the direction toward the support hole 11. That is, the other arm portion of the torsion coil spring 96 urges the first cam gear 8 to rotate in one direction when the first cam gear 8 is in the initial state.

The first cam gear 8 serves as a driving force source for the capstan motor 2 from the capstan gear 7 in the operating state in which the gear portion 9 is meshed with the capstan gear 7. The driving force is transmitted and it is rotated.

The front surface of the first cam gear 8 has a first
Cam 107 is formed to project. This first cam 1
As shown in FIGS. 16 and 17, 07 is formed as an end face cam having a substantially constant height from the 0 ° position to the 248 ° position. Then, the first cam 107
The front end portion of the first cam gear 8 in the rotating direction is substantially vertically raised and serves as a stopper portion 109.

A transmission gear portion 10 is provided on the center side of the first cam gear 8. As shown in FIGS. 1 and 5, a transmission gear 14 rotatably arranged on the rear surface of the chassis 1 meshes with the transmission gear portion 10. A peripheral portion of the transmission gear 14 is formed as a gear portion, and a support shaft planted in the rear surface of the chassis 1 is inserted into a support hole 15 at a central portion of the transmission gear 14 so as to be rotatable about the support shaft. . The transmission gear portion 10 has a toothless portion 104 at a portion facing the transmission gear 14 when the first cam gear 8 is in the initial state.

A second cam gear 18 rotatably arranged on the rear surface of the chassis 1 meshes with the transmission gear 14. A peripheral portion of the transmission gear 14 is a gear portion, and a support shaft 16 planted in the rear surface portion of the chassis 1 is inserted into a support hole 16 at a central portion of the transmission gear 14 so that the transmission gear 14 can rotate around the support shaft. . The second cam gear 18 has a second cam 17 protruding from the front main surface thereof and a third cam 108 protruding from the rear main surface thereof.

As shown in FIG. 19, the second cam 17 is an end face cam formed over a range excluding the 170 ° to 195 ° positions, and is 0 ° from the 234 ° position.
It has a constant height through the position and over the 135 ° position.

As shown in FIG. 18, the third cam 108 is an end face cam formed from the 0 ° position to the 300 ° position, and is substantially extended from the 110 ° position to the 245 ° position. Each has a certain height.

When the first cam gear 8 is rotationally operated, the second cam gear 18 moves the transmission gear 14
The driving force which is the driving force source of the capstan motor 2 is transmitted via the and is rotated. At this time, the second
The number of teeth of the gear portion of the second cam gear 18 is twice the number of teeth of the transmission gear portion 10 of the first cam gear 8 so that the rotation speed of the second cam gear 18 is reduced to (1/2). ,
While the first cam gear 8 makes one rotation (360 ° rotation), it makes (1/2) rotation (180 ° rotation).

At one side edge portion of the chassis 1, as shown in FIGS. 1 and 3, the eject lever 22 is provided.
Is rotatably arranged. This eject lever 2
Reference numeral 2 is a lever formed in a substantially U shape, and has a support hole 21 at one end side. This eject lever 2
The support shaft 2 is rotatably supported around the support shaft 19 by inserting a support shaft 21 planted laterally from the chassis 1 into the support hole 21. The other end of the eject lever 22 is the eject switch unit 27.
The eject switch portion 27 faces the front side. The eject lever 22 has a central portion located rearward of one end side and the other end side.

On one end side of the eject lever 22,
A stopper pin 23 serving as a stopper member is provided upright. The stopper pin 23 enters the rear surface side of the chassis 1 through the through hole 20 provided in the chassis 1, faces the front surface of the first cam gear 8, and the first pin
It is supposed to follow the cam 107 of FIG.

When the first cam gear 8 is in the initial state, the stopper pin 23 has the stopper portion 1
The first cam gear 8 is abutted against 09 to prevent the rotation of the first cam gear 8 from being released. At this time, the first cam gear 8 is
The toothless portion 13 is held in an initial state in which it faces the capstan gear 7.

When the eject lever 22 is rotated by pressing the eject switch portion 27 toward the rear side, the stopper pin 23 moves to the front side, and the stopper pin 23 moves from the third cam 108. Separate. At this time, the stopper pin 23 is connected to the stopper portion 109.
With further separation, the blocking of the rotation of the first cam gear 8 is released. In this way, the first cam gear 8 whose rotation is prevented from being stopped by the stopper pin 23 is
It is rotated in one direction by being rotationally biased by the torsion coil spring 96, the gear portion 9 is meshed with the capstan gear 7, and the operation state is brought about.

A holder operating lever 35 constituting a transmission mechanism is rotatably arranged at one side edge portion of the chassis 1. The holder operating lever 35 has a support hole 41 on the upper end side. The holder operating lever 35 is rotatably supported around the support shaft 42 by inserting the support shaft 42 provided in the chassis 1 into the support hole 41. This holder operating lever 35
Has a copying pin 93 protruding in the middle thereof. The copying pin 93 faces the third cam 108 of the second cam gear 18 and follows the third cam 108.

In the holder operating lever 35, a tension coil spring 37 is stretched between a spring retaining piece 36 provided at a midway portion and a spring retaining piece 38 provided on the chassis 1 so that the holder operating lever 35 in FIG. As indicated by an arrow B, the copying pin 93 is urged to rotate in a direction in which the copying pin 93 is pressed against the third cam 108.

On the lower end side of the holder operating lever 35,
The holder operation pin 39 is planted. The holder operating pin 39 is linked to the holder operating link 43 linked to the cassette holder 50.

That is, the holder operation link 43 is
The cassette holder 5 is inserted into the connecting hole 49 provided on the front end side.
0 of the cassette holder 5 is inserted through a linking pin 56 projecting from the side surface of the cassette holder 5 and rotatable about the linking pin 56.
Linked to 0. And this holder operation link 4
An engagement slit 44 is provided at the rear end side portion of the cable 3 with its longitudinal direction oriented in the front-rear direction. Holder operation pin 3
9 is inserted into the engagement slit 44 and is linked to the holder operation link 43 so as to be movable in the front-rear direction. A guide groove portion 40 is provided on the proximal end side of the holder operation pin 39 so as to engage with both side edge portions of the engagement slit 44 so as to be movable in the front-rear direction.

A limiter spring 48, which serves as a limiter member, is stretched between the holder operating pin 39 and the spring retaining pin 47 projecting from the holder operating link 43. As shown by the arrow A in FIG. 1, the limiter spring 48 urges the holder operation link 43 to move toward the direction in which it approaches the holder operation lever 35, that is, toward the rear side. The limiter spring 48 positions the holder operation link 43 relative to the holder operation lever 35 at a position where the front end of the engagement slit 44 abuts the holder operation pin 39.

The holder operating lever 35 applies the rotational force of the second cam gear 18 to the cassette via the holder operating link 43 when the first cam gear 8 is in the operating state and is being rotated. This is transmitted to the holder 50, that is, the cassette holder 50 is moved (rotated) with the rotation of the second cam gear 18, and the cassette holder 50 is moved between the mounting position and the discharging position. To do.

Further, the limiter spring 48 is arranged between the holder operating lever 35 and the holder operating link 43, and the cassette holder 50 receives an external force when the first cam gear 8 rotates. Even if it is stopped by, the rotation of the first cam gear 8 can be maintained.

That is, when the copying pin 93 of the holder operating lever 35 is pressed by the third cam 108 and moved rearward, the cassette holder 50 is stopped by an external force at a position separated from the chassis 1. If so, the gap between the holder operating pin 39 and the spring retaining pin 47 becomes wider. At this time, the limiter spring 48 is extended and the cassette holder 50 is extended.
Attempting to move it to the chassis 1 side,
Also, the rotation of the second cam gears 8 and 18 is not hindered.

Then, in the upper edge portion of the chassis 1,
A lifter 62 is rotatably arranged. This lifter 6
Reference numeral 2 denotes a laterally long member having a length substantially corresponding to the lateral width of the chassis 1, and is arranged so as to cover the upper portion of the chassis 1. The lifter 62 has a pair of left and right support holes 64, 65 at both side portions bent to the rear side, and a pair of left and right support holes provided on both sides of the upper edge side of the chassis 1 in the support holes 64, 65. By inserting the shafts 66 and 67, the front edge portion is rotatably supported so as to be vertically movable.

In the lifter 62, the operation parts of the detection switches 63 and 64 arranged on an electronic board (not shown) arranged on the back side of the chassis 1 are provided with the lifter 62.
Are engaged with each other in an engagement hole 70 provided in the. The lifter 62 is rotated in conjunction with the rotation operation of the cassette holder 50, and each of the detections is performed on the rear end of the tape cassette 201 mounted on the tape cassette mounting portion. The operating elements of the switches 63 and 64 are pressed to detect the states of various detection holes provided in the tape cassette 201.

A new information signal may be recorded in the detection hole by deleting the type of the magnetic tape 207 or the information signal already recorded in the tape cassette 201 mounted in the tape cassette mounting portion. Whether or not there is a hole is indicated by the presence or absence of a hole at a predetermined position.

Further, the lifter 62 has a pair of left and right hooking claws 68, 69 protruding toward the front side.
The lifter 62 is pivotally operated in conjunction with the pivotal operation of the cassette holder 50, so that the lifter 62 is provided on both sides of the cassette holder 50 when the cassette holder 50 is at the mounting position. Latch pin 57, 57
The rear edge portion 95 of each of the hooking claws 68 and 69 is hooked on, and the cassette holder 50 is hooked at the mounting position.

The lifter 62 has the second cam gear 1
The second cam 17 is moved in accordance with the rotation position of the cassette holder 8 so that the cassette holder 50 is rotated in association with the rotation operation of the cassette holder 50.

That is, the lifter 62 has the copying pin 73 on the side portion. The copying pin 73 is inserted into the rear side of the chassis 1 through a through hole provided in the upper portion of the chassis 1, and the second cam gear 1
8 facing the second cam 17 described above. The lifter 62
1 has a spring retaining piece 74 and is indicated by an arrow C in FIG. 1 by a tension coil spring 75 stretched between the spring retaining piece 74 and the spring retaining piece 76 provided on the chassis 1. As described above, the copying pin 73 is rotationally urged in the direction in which the copying pin 73 is pressed against the second cam 17.

In this tape cassette loading mechanism, when the eject lever 22 is rotated when the first cam gear 8 is in the initial state,
When the blocking of rotation by the stopper pin 23 is released,
It is rotated by the driving force of the capstan motor 2 and returns to the initial state by making one rotation, and is stopped by the stopper pin 22 again. While the first cam gear 8 makes one revolution, as shown in FIG. 16, when the first cam gear 8 is between the 0 ° position and the 238 ° position, the eject lever 22 operates so that the stopper pin 23 is By following the first cam 107, it is held in a rotated state.

While the first cam gear 8 makes one rotation, the second cam gear 18 rotates (1/2) from the 0 ° position to the 180 ° position as shown in FIG. To be done. At this time, the cassette holder 50 is
As shown in FIG. 8, it is rotated from the discharge position to the mounting position. Further, at this time, as shown in FIG. 19, the lifter 62 moves from the state in which the front edge portion is released to the upper side of the chassis 1 to the front side after the second cam gear 18 reaches the 135 ° position. The edge portion is lowered to the chassis 1 side.

While the first cam gear 8 makes one revolution next time, the second cam gear 18 moves from the 180 ° position to the 360 ° position (1/1) as shown in FIG.
2) It is rotated. At this time, the cassette holder 50
18 is rotated from the mounting position to the discharging position, as shown in FIG. At this time, the lifter 62 is
As shown in FIG. 19, from the state where the front edge portion is lowered to the chassis 1 side, after the second cam gear 18 reaches the 434 ° position, the front edge portion is released to the upper side of the chassis 1. Made state.

A stopper control arm 71 serving as a first stopper control member is integrally formed with the lifter 62 so as to extend to the rear side. The stopper control arm 71 is moved and operated by the second cam 17 as a part of the lifter 62 according to the rotational position of the second cam gear 18. The tip side of the stopper control arm 71 is a contact portion 72.

Then, in the holder operation link 43,
Stopper control pin 46 serving as a second stopper control member
Are provided so as to project toward the side. Since the holder operation link 43 is linked to the cassette holder 50, the stopper control pin 46 is moved in the front-rear direction as the cassette holder 50 rotates.

A stopper control lever 29 constituting a stopper control mechanism is rotatably attached to the eject lever 22. This stopper control lever 29 is
The support pin 33 having the support hole 28 and fitted in the fitting hole 26 provided in the eject lever 22 is
It is rotatably supported by being inserted through 8.

The stopper control lever 29 has a contact edge portion 31 which extends toward the front side and contacts the stopper control pin 46. The stopper control lever 29 is moved in the direction in which the contact edge portion 31 is moved upward as shown by an arrow E in FIG. 1 by a torsion coil spring 32 in which a coil portion is wound around the support pin 33. It is biased to rotate. The torsion coil spring 32 is
One arm is hooked on a spring hooking piece 24 provided on the upper end side of the eject lever 22, and the other arm is hooked on a spring hooking piece provided on the rear side of the stopper control lever 29. It is hooked at 30. The stopper control lever 29 is positioned at the initial position by the positioning piece 25 provided on the rear side portion of the eject lever 22.

As shown in FIG. 3, when the stopper control lever 29 is positioned at the initial position with respect to the eject lever 22, the abutting edge when the eject lever 22 is rotated. The movement locus of the portion 31 intersects with the movement locus of the stopper control pin 46 accompanying the rotation of the cassette holder 50 at the front side position.

The stopper control arm 71 is
When the eject lever 22 is pivotally operated to pivot the cassette holder 50 from the mounting position to the ejection position, the front edge of the lifter 62 is located above the chassis 1 as shown in FIG. When it is released, the abutting portion 72 presses the abutted portion 94 provided on the rear side portion of the stopper control lever 29 so that the stopper control lever 29 is biased by the torsion coil spring 32. It is rotated with respect to the eject lever 22.

In the state where the stopper control lever 29 is rotated with respect to the eject lever 22, the movement locus of the contact edge portion 31 when the eject lever 22 is rotated is the cassette holder 50. At the rear position, the movement locus of the stopper control pin 46 due to the rotation of is crossed.

The stopper control lever 29 is
When the eject lever 22 is rotated and the first cam gear 8 is in the operating state, the position of the stopper control arm 71 and the stopper control pin 4 are set.
When the contact edge portion 31 is brought into contact with the stopper control pin 46 according to the position of 6, the eject lever 22 is prevented from returning to the initial position.

That is, this stopper control lever 29
When the contact edge portion 31 is to be brought into contact with the stopper control pin 46 according to the position of the stopper control arm 71 and the position of the stopper control pin 46, the first state in the operating state is set. The stopper pin 23 is prohibited from stopping the rotation of the cam gear 8 in the initial state.

By this stopper control mechanism, the cassette holder 5 is rotated even though the first cam gear 8 is rotated after the eject lever 22 is rotated.
0 is stopped by an external force, and the copying pin 93 of the holder operating lever 35 is separated from the third cam 108, or when the limiter spring 48 is extended, the cassette holder 50 moves the first cam gear. It is detected that the position does not correspond to the rotation angle position of No. 8, and the first cam gear 8 is further rotated once, and the eject lever 22 is returned to the state when rotated.

In the tape cassette loading mechanism constructed as described above, as shown in FIG. 6, when the cassette holder 50 is at the mounting position,
As indicated by an arrow H in FIG. 6, when the eject switch portion 27 is pressed, the stopper pin 23 is moved in a direction away from the first cam 107, and the first cam gear 8 rotates. Is released, and is rotated by the driving force of the capstan motor 2. Then, the eject lever 22 is, as shown in FIG.
It is rotated to the rear side. At this time, the lifter 62 is rotated in a direction to allow the front edge portion to escape to the upper side of the chassis 1, and the stopper control arm 71 causes the contact portion 72 to move the stopper control lever 29 to the eject lever 22. Rotate against. Further, the cassette holder 50 is rotated toward the ejection position, and the stopper control pin 46 is moved forward as the cassette holder 50 is rotated, as indicated by an arrow K in FIG. .

When the first cam gear 8 makes one revolution and returns to the initial state, the stopper pin 23
Will be stopped by. At this time, the second cam gear 18
Is rotated by (1/2), and the cassette holder 50
Is set to the discharge position as shown in FIG.

In the process of rotating the cassette holder 50 from the mounting position to the discharging position as described above,
As shown in FIG. 9, when the cassette holder 50 is stopped by an external force by the hand 214 or the like, the first cam gear 8 is rotated in the same manner as when the cassette holder 50 is not stopped. However, the copying pin 93 of the holder operating lever 35 is separated from the third cam 108, and the stopper pin 46 is inserted into the cassette holder 50.
Will be located on the rear side as compared with the case where is not stopped. Then, since the stopper control lever 29 is rotated with respect to the eject lever 22 by pressing the contacted portion 94 by the stopper control arm 71, the eject lever 22 will return to the initial position. Then, the contact edge portion 31 is brought into contact with the stopper control pin 46.

Since the contact edge portion 31 is in contact with the stopper control pin 46, the eject lever 22 is in a state of being supported by the stopper control pin 46 and cannot be returned to the initial position, so that the stopper Since the pin 23 cannot be returned to the initial position, the first cam gear 8 cannot be stopped. Therefore, the first cam gear 8 passes through the initial state and continues to rotate. Then, the first cam gear 8 makes two revolutions after the eject switch portion 27 is pressed, that is, the second cam gear 18 makes one revolution, and the cassette holder 50 is set to the mounting position. At the same time, the above-mentioned initial state is again established and the operation is stopped.

Further, in the process of rotating the cassette holder 50 from the mounting position to the discharging position, as shown in FIG.
As shown in 0, even when the cassette holder 50 is stopped at the mounting position by the external force of the hand 214 or the like, the first cam gear 8 is the same as when the cassette holder 50 is not stopped. Is rotated to
The copying pin 93 of the holder operating lever 35 is separated from the third cam 108, and the stopper pin 46 is located on the rear side as compared with the case where the cassette holder 50 is not stopped. Then, the stopper control lever 29
Is pressed against the contacted portion 94 by the stopper control arm 71 and rotated with respect to the eject lever 22, so that when the eject lever 22 attempts to return to the initial position, The contact edge portion 31 is brought into contact with the stopper control pin 46.

Since the contact edge 31 is in contact with the stopper control pin 46, the eject lever 22 is in a state of being supported by the stopper control pin 46 and cannot be returned to the initial position, so that the stopper is stopped. Since the pin 23 cannot be returned to the initial position, the first cam gear 8 cannot be stopped. Therefore, the first cam gear 8 passes through the initial state and continues to rotate. Then, the first cam gear 8 makes two revolutions after the eject switch portion 27 is pressed, that is, the second cam gear 18 makes one revolution, and the cassette holder 50 is set to the mounting position. At the same time, the above-mentioned initial state is again established and the operation is stopped.

In this tape cassette loading mechanism, as shown in FIG. 11, when the cassette holder 50 is at the ejecting position, the eject switch section 27 is operated as indicated by an arrow N in FIG. When the pressing operation is performed, the stopper pin 23 is moved in a direction away from the first cam 107, the first cam gear 8 is unlocked from rotation, and the driving force of the capstan motor 2 causes the first cam gear 8 to release. It is rotated. Then, the eject lever 22 is rotated rearward, as shown in FIG. At this time, the cassette holder 50
Is rotated toward the mounting position, and the stopper control pin 46 is moved rearward as the cassette holder 50 is rotated, as indicated by an arrow L in FIG.

At this time, since the lifter 62 is still rotated in the direction in which the front edge portion is released to the upper side of the chassis 1, the stopper control arm 71 causes the contact portion 72 to move to the stopper control lever 29. It is located on the front side of the movement locus of the contacted portion 94, and the stopper control lever 29 is not rotated with respect to the eject lever 22. Then, after the cassette holder 50 is set to the mounting position, the lifter 62 is rotated in a direction in which the front edge portion is lowered to the chassis 1 side.

When the first cam gear 8 makes one revolution and returns to the initial state, the stopper pin 23
Will be stopped by. During this time, the second cam gear 18
Is rotated by (1/2), and the cassette holder 50
Is set to the mounting position as shown in FIG.

In the process of rotating the cassette holder 50 from the ejection position to the mounting position as described above,
As shown in FIG.
If it is stopped by an external force such as
The first cam gear 8 is rotated in the same manner as when the cassette holder 50 is not stopped, but the limiter spring 48 is extended and the stopper pin 46 is used when the cassette holder 50 is not stopped. In comparison, it will be located on the front side. Then, the stopper control lever 29 causes the contact edge portion 31 to contact the stopper control pin 46 when the eject lever 22 tries to return to the initial position.

When the contact edge portion 31 contacts the stopper control pin 46, the eject lever 22
Cannot be returned to the initial position by being supported by the stopper control pin 46, and the stopper pin 23 cannot be returned to the initial position. Therefore, the first cam gear 8 cannot be stopped. Therefore, the first cam gear 8 passes through the initial state and continues to rotate. Then, the first cam gear 8 makes two revolutions after the eject switch portion 27 is pressed, that is, the second cam gear 18 makes one revolution, and the cassette holder 50 is set to the ejection position. At the same time, the above-mentioned initial state is again established and the operation is stopped.

In the process of rotating the cassette holder 50 from the ejecting position to the mounting position, as shown in FIG.
As shown in FIG. 5, even when the cassette holder 50 is stopped at the discharge position by an external force by the hand 214 or the like, the first cam gear 8 is the same as when the cassette holder 50 is not stopped. Is rotated to
The limiter spring 48 is extended so that the stopper pin 46 is located on the front side as compared with the case where the cassette holder 50 is not stopped. Then, the stopper control lever 29 positions the contact edge portion 31 to the rear side of the stopper control pin 46 when the eject lever 22 returns to the initial position. At this time, the first cam gear 8 is stopped in the initial state.

Since the contact edge portion 31 is located on the rear side of the stopper control pin 46, the external force on the cassette holder 50 is released, and the cassette holder 50 is mounted by the restoring force of the limiter spring 48. When rotated to the position side, the stopper control pin 46
As shown by an arrow P in FIG. 15, the corresponding edge portion 31 is pressed to rotate the eject lever 22 via the stopper control arm 29. Therefore, the first cam gear 8 is rotated again, and when the eject switch portion 27 is pressed and rotated two times, that is, the second cam gear 18 is rotated once, and the cassette holder 50 is rotated. When the discharge position is reached, the initial state is restored again and the operation is stopped.

In this tape cassette loading mechanism, as shown in FIG. 11, the abutting edge 31 is located behind the stopper control pin 46 even when the cassette holder 50 is at the ejecting position. It is located on the side. Therefore, when the cassette holder 50 is at the discharge position, the cassette holder 5
When 0 is rotated to the mounting position side by an external force, the stopper control pin 46 presses the contact edge portion 31 and rotates the eject lever 22 via the stopper control arm 29. At this time, the first cam gear 8
Is rotated in the same manner as when the eject switch unit 27 is pressed, and when rotated once, that is,
When the second cam gear 18 is rotated by (1/2) to bring the cassette holder 50 to the mounting position, the cassette holder 50 is stopped in the initial state.

The recording medium loading device according to the present invention is not limited to the tape cassette loading mechanism used in the tape recorder device as in the above-mentioned embodiment, but various recording / reproducing devices such as a video tape recorder device and a disk recorder. It can be configured as a device or a mechanism used in a disc player device or the like.

The recording medium in the disc recorder device or the disc player device is a recording disc such as a so-called optical disc, magnetic disc, or magneto-optical disc. In such a disc recorder device or disc player device, the driving force source for feeding and operating the recording disc with respect to the head device for recording / reproducing information signals on / from the recording disc is the recording disc. It becomes a spindle motor to rotate the.

[0092]

As described above, in the recording medium loading mechanism according to the present invention, the cam gear having the gear portion having the toothless portion is rotated by the motor serving as a driving force source for feeding and operating the recording medium. When it is meshed with the drive gear that is being driven, it is rotated by the driving force of the motor through this drive gear, and the holder member is moved through the transmission mechanism, and the recording that is held by this holder member is performed. The medium is moved and operated between the mounting position and the ejecting position in the recording / reproducing apparatus.

That is, according to the present invention, the structure of the recording / reproducing apparatus is not complicated, the size is large, and the manufacturing is complicated.
It is possible to provide a recording medium loading mechanism in which a loading operation for mounting a recording medium on the recording / reproducing apparatus can be performed by a driving force of a motor.

Further, in this recording medium loading mechanism, the first stopper control member moved and operated in accordance with the rotational position of the cam gear, the second stopper control member moved and operated together with the holder member, and the transmission described above. The position of the limiter member, which is arranged in the mechanism and allows the rotation of the cam gear to be maintained even if the holder member is stopped by an external force while the cam gear is rotating, and the position of the first stopper control member. And a stopper control mechanism that prohibits the stopper member from returning to the initial position and blocking the rotation of the cam gear according to the position of the second stopper control member, the holder member is moved by an external force. When is blocked, the holder member can be returned to the position before the start of the moving operation and stopped.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a recording medium loading mechanism according to the present invention.

FIG. 2 is a front view showing the configuration of the recording medium loading mechanism.

FIG. 3 is a side view showing the configuration of the recording medium loading mechanism.

FIG. 4 is a front view showing a configuration of a driving force transmission system of the recording medium loading mechanism.

FIG. 5 is a side view showing an internal configuration of the recording medium loading mechanism.

FIG. 6 is a side view showing an initial state of the recording medium loading mechanism.

FIG. 7 is a side view showing a lid opening operation start state of the loading operation of the recording medium loading mechanism.

FIG. 8 is a side view showing a state where the opening operation of the recording medium loading mechanism is completed.

FIG. 9 is a side view showing a state in which movement of the holder is blocked by an external force during the opening operation of the recording medium loading mechanism.

FIG. 10 is a side view showing a state in which the lid opening operation is started while the holder in the lid closed state is prevented from moving by an external force in the recording medium loading mechanism.

FIG. 11 is a side view showing an opened state of the holder of the recording medium loading mechanism.

FIG. 12 is a side view showing a closing operation start state of the loading operation of the recording medium loading mechanism.

FIG. 13 is a side view showing a state where the closing operation of the recording medium loading mechanism is completed.

FIG. 14 is a side view showing a state in which the movement of the holder is blocked by an external force during the closing operation of the recording medium loading mechanism.

FIG. 15 is a side view showing a state in which the lid-opening operation is started while the holder with the lid opened in the recording medium loading mechanism is prevented from moving by an external force.

FIG. 16 is a cam diagram showing a cam shape of a first cam gear.

FIG. 17 is a cam diagram showing the cam shape of the cam of the first cam gear, in which the scale of the horizontal axis corresponds to the reduction ratio for the motor.

FIG. 18 is a cam diagram showing a cam shape of a cam on the back surface side of a second cam gear.

FIG. 19 is a cam diagram showing a cam shape of a cam on the front surface side of a second cam gear.

FIG. 20 is a cam diagram showing respective cam shapes of a cam of the first cam gear, a back cam and a front cam of the second cam gear.

[Explanation of symbols]

 2 Capstan motor 7 Capstan gear 8 First cam gear 9 Gear portion 13 Toothless portion 18 Second cam gear 23 Stopper pin 29 Stopper control lever 35 Holder operating lever 46 Stopper control pin 48 Limiter spring 50 Cassette holder 71 Stopper control arm 89 Erase head 90 Recording / reproducing head 96 Twisting coil spring 201 Tape cassette 207 Magnetic tape

Claims (2)

[Claims] 1. A motor provided as a driving force source for feeding and operating a recording medium to and from a head device for recording and reproducing an information signal on a recording medium, and a gear portion having a toothless portion for rotation. A cam gear that is rotatably supported and that is rotated in a state in which the toothless portion faces a drive gear that is rotationally operated by the driving force of the motor and a state in which the gear portion meshes with the drive gear; The rotational force of the cam gear is transmitted to a holder member that holds the recording medium, and the holder member is moved and operated in accordance with the rotation of the cam gear, and the recording medium held by the holder member is moved to the mounting position and the ejecting position. A transmission mechanism for moving and operating the cam gear, and a stopper member for blocking the rotation of the cam gear so that the cam gear can be released and holding the cam gear at a position where the toothless portion faces the drive gear. When the stopper member stops releasing the rotation of the cam gear, the cam gear is urged to rotate so that the gear portion meshes with the drive gear. When the gear portion is meshed with the drive gear, it is rotated by the driving force of the motor through the drive gear, and the holder member is moved through the transmission mechanism to move the recording medium at the mounting position. And a recording medium loading mechanism that is moved between the ejecting position and the ejecting position. 2. A first stopper control member that is moved according to the rotational position of the cam gear, a second stopper control member that is moved together with the holder member, and the cam gear that is disposed in the transmission mechanism. A limiter member that enables the rotation of the cam gear to be maintained even if the holder member is stopped by an external force while rotating, the position of the first stopper control member, and the second stopper. 2. The recording medium loading mechanism according to claim 1, further comprising a stopper control mechanism that prohibits the stopper member from returning to the initial position and blocking the rotation of the cam gear according to the position of the control member.