JPS598897B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pull-out means for pulling out a magnetic tape from a cassette containing the magnetic tape, and a winding of the magnetic tape pulled out by the pull-out means around a rotating head drum and a predetermined tape running path. The present invention relates to a device for recording and reproducing signals by loading a magnetic tape onto the rotating head drum, and having a tape loading means such as an annular rotating ring with a plurality of guide pins installed therein for loading the magnetic tape into the rotating head drum. The object is to provide a drive transmission means for driving the pull-out means and the rotary ring with a compact and simple structure.

Conventionally, in order to perform a stable tape loading operation in a magnetic recording/reproducing device with a tape loading mechanism as described above, the tape is first pulled out from the cassette by a pull-out means, and then a guide post or the like on a rotating ring is used. At first, it passes through and then forms a roughly triangular tape loop that is large enough to come into contact with the tape, and then the guide posts on the rotating ring rotate as described above and are attached to the drum. There is a need to load the magnetic tape, so conventional methods
Because it is configured by switching the driving force from one drive source to the driving of the pull-out means and the driving of the rotating ring by a complicated combination of a cam and a group of gears, complicated adjustment is required.

Further, according to another embodiment, the above-mentioned tape loop is formed quickly by driving the drawing means and the rotary ring at the same time and increasing the drawing speed of the drawing means. If the withdrawal speed is increased, problems such as slackening of the magnetic tape occur, resulting in a longer time required for the entire loading operation. The present invention eliminates the above drawbacks, and one embodiment thereof will be described below with reference to the drawings. In Fig. 1, numeral 1 is a chassis, and approximately in the center thereof is a rotary head drum 2, and in the vicinity thereof are entrance posts 14, 18, an erasing head 16, an exit post 20, an audio control head 22, and a caftan 24. .

A rotating ring 4 is supported by support rollers 26, 28, and 30.

Guide posts 6a, 6b, 6 are provided on the upper surface of the rotating ring 4.
There is a C1 pinch roller 8, and a first pin 10 and a second pin 12 are provided on the bottom surface. In the figure, the first pin 10 is in contact with the first lever 52, and the second pin 12 is in contact with the first latch lever 32. The first lever 52 rotates around a shaft 54, and is further connected to a second lever 56 by, for example, a wire (not shown). Also, the first pin 10 and the first pin 10
Due to the contact with the lever 52, the tension spring 60, which is placed between one end of the second lever 56 and the spring hook pin 62, is stretched. The rotation center shaft 58 is the button lever 55
This button lever 55 is connected to a PLAY button 71 (not shown) via a pin 61, for example, by a wire or the like. Further, the button lever 55 is rotatable about a shaft 59, and a pin 57 on the button lever 55 is in contact with a second lever 56. One end of the second lever 56 abuts the drawer latch lever 66 and stretches a tension spring 70 that is hooked between one end of the drawer latch lever 66 and the spring hook pin 72. The pin 64 is rotated by the tension spring 60 so that the second lever 56 is rotated by the central axis 58.
This is the stop flange that should come into contact when rotating around . Note that the drawer latch lever 66 is rotatable about a rotation center shaft 68. Reference numeral 40 denotes a third lever that is rotatable about a rotation center shaft 42 .

A tension spring 48 is applied between one end of the third lever 40 and the spring-loading pin 50, and in the figure, the tension spring 48 is suspended by the contact between the pin 46 and the third lever 40.
The force of is locked. Reference numeral 44 designates a stopper with which the third lever 40 comes into contact when the third lever 40 rotates about the rotation center shaft 42 against the force of the tension spring 48.

The third lever 40 and the first latch lever 32 are connected to each other by, for example, a wire (not shown), and the first latch lever 32 is rotatable about the rotation center shaft 34, and the first latch lever 32 is A tension spring 36 is placed between one end of the spring 32 and the spring hook pin 38. Reference numeral 106 denotes a drawer I-arm, which rotates around the rotation center axis 104.

As shown, one end on the puller arm 106 has a puller pin 112 that extends inside the magnetic tape 114 in the force set 120. 116 and 118 are reels.

In FIG. 1, FIG. 3, and FIG. 4, 74 is a driving base. A rotating ring drive gear 82 is attached to the rotating shaft 84 and meshes with the rotating ring 4.

On the other hand, the rotating ring drive gear 82 also meshes with the fourth drive gear 90. This fourth drive gear 90 is connected to the drive base 74
It is fixed to a rotating shaft 92 having a bearing. Further, the fourth drive gear 90 is integral with a rotating disk 86 via a rotation center shaft 92, and the rotation disk 86 is connected to a first small gear 94 that rotates around a rotation center shaft 93, and a rotation center shaft 93. A second small gear 96 that rotates around a rotation center axis 95 and a third small gear 98 that rotates around a rotation center axis 97 are integrated. These small gears 94
, 96 and 98 mesh with the internal gear surface of the second drive gear 80 and the first drive gear 103, respectively. The side surface of the second drive gear 80 has a concave surface, and the drawer arm 106
A belt 81 is placed between the small pulley 110 and the small pulley 110 that rotate together around the rotation center axis 104. The second drive gear 80 is rotatably attached to the rotation center shaft 101. Said first
The drive gear 103 rotates together with the rotation center shaft 101, and is also integrated with the third drive gear 99 using the drive base as a bearing. The third drive gear 99 meshes with a motor gear 100 that rotates integrally with the rotation center shaft 102 . Next, the operation of the device of the present invention will be explained. In FIGS. 1 and 3, when the PLAY button 71 is first pressed, the pin 61 at one end of the button lever 55 is moved in the direction A by a connection such as teeth, and the contact between the pin 57 and the second lever 56 causes the pin 61 to move in the direction A. The second lever 56 is rotated clockwise about the rotation center shaft 59, and the drawer latch lever 66 is rotated counterclockwise about the rotation center shaft 68 while in contact with the second lever 56. Let it be.

On the other hand, when the PLAY button 71 is pressed, the motor gear 100 rotates counterclockwise, and the third drive gear 99
0 and rotates clockwise, and further the first drive gear 1
03 also rotates together. The driving force of the first driving gear 103 is transmitted to each small gear 94, 96, 98, and drives the fourth driving gear 90, which rotates together with the rotary disk 86, clockwise.
Then, the rotary ring 4 is attempted to be rotated clockwise via the rotary ring drive gear 82 meshed with the fourth drive gear 90, but at this time, the second pin 12 on the lower surface of the rotary ring 4 is connected to the first latch lever 32. Since the rotation ring 4 is locked by the rotation ring 4, the rotation ring 4 cannot be rotated clockwise.
Therefore, the driving force for rotating the first driving gear 103 in the clockwise direction is transmitted to the second driving gear 8 through each small gear 94, 96, 98.
0 in the counterclockwise direction. This counterclockwise rotation of the second drive gear 80 is caused by the rotation of the second drive gear 80 through the belt 81 and the small pulley 11.
Delivered on October 10th. The small pulley 110 is the rotation center shaft 10
Because it rotates integrally with the drawer arm 106 via 4,
Extraction pin 112 at one end of extraction arm 106 begins to withdraw magnetic tape 114 within force set 120. As the counterclockwise rotation of the drawer arm 106 progresses further, the second
As shown, one end of the drawer arm 106 abuts the third lever 40, which abuts the stopper 40 while stretching the tension spring 48 away from the pin 46.

At this time, the pin 108 on the drawer arm 106 enters the recess while abutting the drawer latch lever 66, so that the drawer arm 106 is prevented from rotating clockwise.

Since the third lever 40 is connected to the first latch lever 32 by, for example, a wire, the third lever 40
Due to this movement, the first latch lever 32 rotates about the central rotation axis 34 while stretching the tension spring 36.

At this time, the second pin 12 separates from the first latch lever 32. Here, the driving force of the first drive gear 103 is
Since the driving load on the pull-out arm 106 is lighter than the driving load on the pull-out arm 106, the driving load is transferred from each small gear 94, 96, 98 to the rotating ring driving gear 82 via the rotating disk 86 and the fourth driving gear 90.
As a result, the rotating ring 4 receives a clockwise rotational force. When the rotating ring 4 rotates clockwise, the first
The pin 10 is separated from the first lever 52, and the force of the tension spring 60 between the second lever 56 and the pin 62 is transmitted from the second lever 56 to the first lever 52 by, for example, a wire, so that the first lever 52 is rotated counterclockwise about the rotation center axis 54.

On the other hand, the second lever 56 is rotated about the rotation center shaft 58 by the force of the tension spring 60 and comes into contact with the pin 64 .
During the unloading operation, the pin 61 of the button lever 55 is driven in the direction B by the return of the PLAY button 71, but since the first lever 52 is not in contact with the first pin 10, the first lever 52 and the wire etc. Since the second lever 56 connected to the pin 64 contacts the pin 64, and the clockwise rotation of the drawer lever 106 is stopped by the drawer latch lever 66, when the motor gear 100 is reversed, the rotation ring 4 is first reversed. The pin 1 on the drawer arm 106 rotates clockwise and the first pin 10 comes into contact with the first lever 52.
08 and the drawer latch lever 66 are released, the drawer arm 106 rotates clockwise and the magnetic tape 11
4 is housed in the force set 120.

As described above, according to the magnetic recording and reproducing apparatus of the present invention, the tape loading drive force is divided and transmitted to the rotation ring and the pull-out arm by the planetary gear mechanism, so that the drive force is completely divided. It's reasonable and doesn't require complicated adjustments.

In addition, the drawer arm can be held with a simple mechanism, and the operating speed of the drawer arm and rotation ring can be designed arbitrarily, making it possible to reasonably shorten the time required for loading and providing high reliability. It can perform a loading function.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are schematic top views of a recording/reproducing apparatus, FIG. 3 is a side partial sectional view of the tape loading drive section, and FIG. 4 is a tape loading drive section. FIG. 2...Rotating head drum, 4...Rotating ring, 6a-6c...Guide pin, 80...
...Second drive gear, 94, 96, 98...
Small gear, 100...Motor gear, 103...
...First drive gear, 106...Drawer arm, 114...Magnetic tape, 120...
Power set.

Claims (1)

[Claims] 1. A pull-out means for pulling out a magnetic tape from a cassette storing the magnetic tape, and a plurality of guide pins for winding the magnetic tape pulled out by the pull-out means around a rotating head drum and loading it onto a predetermined tape running path. A device for recording and reproducing signals, which has a tape loading means such as an implanted annular rotating ring, and includes a tape loading drive source, a sun gear connected to the tape loading drive source, and the drawing means or the tape. A drive gear that drives a loading means, a plurality of planetary gears that mesh with the sun gear and the drive gear and perform a revolution movement when the drive gear is stopped, and a rotation support shaft for the planetary gears, and and a rotating body that rotates due to the revolution of the planetary gear to drive the drawing means or the tape loading means, and the sun gear rotates when the tape loading drive source is driven, thereby causing the plurality of It is characterized in that the rotating body is rotated when the planetary gear performs a revolving motion, and the rotation of the rotating body is stopped, and the driving gear is driven when the planetary gear only performs a rotational motion. magnetic recording and reproducing device.