JPS62154255A - Pinch roller moving device - Google Patents

Abstract

PURPOSE:To make a magnetic tape device thinner in thickness, by providing a pinch roller moving device composed of a tape pull-out member which pulls out a magnetic tape from its cassette, pinch roller, reciprocatively moving member which reciprocatively moved the pinch roller, and riving member which drives the reciprocatively moving member. CONSTITUTION:A capstan shaft 2 is positioned at a location where a capstan flywheel 3 and tape cassette 4 are not overlapped each other in the height direction of this device and the capstan flywheel section of a base plate 1is raised to a level where the flywheel does not interfere with the pulling out and running of a magnetic tape 12. In addition, in order to make a magnetic tape device thinner in thickness, a pinch roller 23 is moved from the outside of the magnetic tape loop to the inside of the magnetic tape loop and a tape pull-out member is locked to a prescribed position by the moving member which moves the pinch roller 23.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to pulling out a magnetic tape from a tape cassette.
The magnetic head located outside the cassette runs along the
This invention relates to a pinch roller moving device for a ζfI tape device for recording and reproducing signals.

2. Description of the Related Art In a conventional video tape recorder (n tape device), for example, as shown in Japanese Patent Publication No. 59-27983, the capstan shaft 2 is connected to the opening of the tape cassette 4 as shown in FIG. As shown in the ninth white side view of the device, the tape cassette 4 and capstan flywheel 3 overlap in the height direction of the device. To,
Direct-drive capstan motors are available that directly drive the capstan, but the tape cassette and direct drive capstan motor must be installed at the height of the device in order for the capstan shaft to enter the tape cassette opening. The configuration is such that they overlap in the horizontal direction.

Problems to be Solved by the Invention However, with such a configuration, the capstan flywheel 3 and the tape cassette 4 overlap in the height direction of the device. The minimum height of the device is the sum of the thickness of the capstan flywheel 3 and the thickness of the capstan flywheel 3, and there is a drawback that it is impossible to make the device thinner than that height.

It is an object of the present invention to eliminate such drawbacks and to reduce the thickness of a magnetic tape device.

Means for Solving the Problems In order to solve the above problems, a pinch roller invented by Jin
The moving device includes a tape drawer that pulls out the magnetic tape from inside the tape cassette to the outside of the tape force center, a pinch roller that moves the magnetic tape in cooperation with a capstan shaft, and a pinch roller that pulls out the magnetic tape from the inside of the tape cassette to the outside of the tape force center. 4
reciprocating between a first position that does not interfere with the tape pulling operation of the stage and a second position within the pulled-out magnetic tape loop;
The apparatus further includes a reciprocating member having a locking means for locking the tape drawing means in a predetermined position at the second position, and a drive member for driving the reciprocating member.

According to the present invention, with the above-described configuration, the capstan shaft can be placed at any position where the flywheel and the magnetic tape cassette do not overlap in the height direction of the device, and the position of the drawer member relative to the pinch roller is also accurate. You can decide on the position.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. 1 and 2 show its basic configuration.

In this embodiment, as shown in FIG. 1, the capstan shaft 2 is arranged at a position where the capstan flywheel 3 and the tape cassette 4 do not overlap in the height direction of the device, and as shown in FIG. In order to make the magnetic tape device thinner by raising the capstan flywheel portion to a position where it does not interfere with the drawing out of the magnetic chip 112 and the running of the magnetic tape 12, the L.
The pinch roller 23 is moved into the loop of the irrigating tape, and the tape pull-out member is locked at a predetermined position by the moving member that moves the pinch roller 23.

FIG. 3 shows a more specific configuration, and FIG. 4 shows a side sectional view thereof. In FIGS. 3 and 4, a loading motor 14 for driving a pinch roller 23 is fixed to the substrate 1. As shown in FIGS.

The spur gear 16 that rotates integrally with l1l=15 of the loading motor 14 is connected to a shaft 136 implanted in the substrate l.
A gear portion 18a of the drive member 18 is rotatably supported by a shaft 17 implanted on the substrate 1.
It meshes with. The drive member 18 is rotatable on a shaft 21 implanted on the substrate 1 ↓ A second end face cam abuts on a first end face 27a of a rotary arm 27 supported and presses the first end face 27a. The part 18 (4) is loosely fitted into the shaft 17, is guided by the shaft 17, and comes into contact with the protrusion 19a of the elevating part + O ICI, which is movable in a direction substantially perpendicular to the substrate 1, and the elevating member 19 is moved. After the grooved cam portion 18b that closes the elevating group and the pinch roller 23 are moved to a predetermined position, the pinch roller 23 is moved to a predetermined position.
It has a first end cam portion 18d that comes into contact with the protrusion 22a of the crimping member 22 that presses the capstan 2 to the capstan 2, and presses the word origin 22a. The outer peripheral boss portion 20a of the pinch arm 20 that is rotatably engaged with the shaft 21 is
The crimping member 22 is loosely fitted into the inner circumferential surface 22c of the crimp member 22, is loosely fitted into a hole 19b provided at one end of the elevating member 19, is supported by the hole upper end surface 22d of the crimping member 22, and is 22 is the hole upper end surface 19 of the elevating member 19;
It is supported by c. Therefore, when the elevating member 19 is guided by the shaft 17 and moved upward or downward, the crimp member 22 and the pinch arm 20 are guided by the shaft 143 and moved upward or downward together with the elevating member 19. As shown in FIG. 3, a tension spring 25 is stretched between the spring hook 22e of the crimping member 22 and the spring hook 20b of the pinch arm 20, and the stopper 22b provided on the crimping member 22 is attached to the pinch arm. End face 2 of arm 20
By providing 0C, the crimping member 22 and the pinch arm 20 are integrated and rotated together. Further, the protrusion 22a of the crimping member 22 is biased
24, the protrusion 22a is constantly pressed against the outer peripheral surface of the drive member 18, and after the elevating member 19 has descended to the lowest position, the protrusion 22a is constantly pressed against the first end cam portion 18d, The crimp member 22 rotates about the shaft 21 by being guided by the first end cam portion 18d. In addition, a pinch roller 2 is attached to a shaft 32 installed at the end of the pinch arm 20 that rotates integrally with the pressure lever 22.
3 is rotatably supported. On the other hand, the guide post 31 for pulling out the magnetic tape 12 is implanted at one end of a guide post arm 29 rotatably supported by a shaft 28 implanted on the substrate 1, and the other end is implanted at the other end of the guide post arm 29, which is rotatably supported by a shaft 28 implanted on the substrate 1. A pin 30 is installed in contact with the second end surface 27b of the pivot arm 27, and the second end surface 27b of the pivot arm 27 presses the pin 30, so that the guide post arm 29 rotates about the shaft 28. move.

A positioning hole 29a is provided at one end of the guide boss arm 29.
When the pinch roller 23 descends to the second position 1, it engages with the protrusion 19C of the elevating member 19, and the guide post arm 29 is locked in a predetermined position.

The grooved cam portion +8b, the second end cam portion 18e, and the first end cam portion 18d are designed so that the lift l changes within a certain rotation angle range, as shown in FIG. 1O.

Now, when the counterclockwise rotation of the loading motor 14 is transmitted to the drive member 18 via the spur gear 16, the various drive members 18 rotate clockwise, and when the rotation angle reaches 34 degrees, the second end face cam By pressing the portion 180, the rotating arm 27 rotates counterclockwise about the shaft 21, and the guide post arm 29 that contacts the rotating arm 27 rotates clockwise about the shaft 28. , the guide post 31 pulls out the magnetic tape 12 to a predetermined position as shown in FIG. Drive member 1
8 continues to rotate up to 74°, the lifting member 19, the crimping member 22, and the pinch arm 20 that come into contact with the grooved cam portion 18b
The pinch roller 23 integrally descends substantially perpendicularly to the running surface of the magnetic tape 12 and is supported at the end of the pinch arm 20.
As shown in FIG. 4, the guide post 31 descends perpendicularly to the running surface of the magnetic tape 12 as shown in FIG. It is located inside the magnetic tape loop formed by the guide post 31 pulling out the magnetic tape 12 . When the drive member 18 continues to rotate further, the crimping member 22 and the pinch arm 20 are rotated clockwise around the shaft 21 by being pressed by the first end cam portion 18d, and the rotation angle of the drive member 18 is increased to 275. The pinch roller 23 comes into contact with the capstan 2 on the way to reach the capstan 2, preventing rotation of the pinch arm 20. From then on, only the crimp lever 22 continues to rotate, so it is crimped with the spring hook 20b of the pinch arm 20. When the spring hook 22e of the member 22 is separated against the biasing force of the tension spring 25 and the rotation angle of the drive member 18 reaches 275°, a predetermined pressing force of the pinch roller 23 against the capstan 2 is obtained. It's Nishide. The driving member 1
8 rotates beyond a rotation angle of 275 degrees, the lift ffl of the first end cam portion 18d does not change, so the pinch roller 23 remains pressed against the capstan 2, and the motor (not shown) rotates. As a result, the magnetic tape 12 is transferred by the cooperation of the capstan 2, which is rotationally driven by the motor, and the pinch roller 23.

Effects of the Invention The present invention provides a tape pull-out member for pulling out a magnetic tape to the outside of a tape cassette, a pinch roller for transporting the magnetic tape in cooperation with a capstan shaft, and a pinch roller for transferring the magnetic tape.
reciprocally moves between a first position that does not interfere with the tape drawing operation of the tape drawing member and a second position within the pulled-out magnetic tape loop, and locks the tape drawing means at a predetermined position in the second position. By providing a pinch roller moving device consisting of a reciprocating member having a locking means and a drive member for driving the reciprocating member, a capstan shaft, Alternatively, it is not necessary for either of the pinch rollers to enter the loop of the magnetic tape at the opening of the tape cassette, and the capstan shaft can be connected to the capstan flywheel, the capstan direct drive motor, or the pinch roller. Since the support member and the tape cassette can be arranged at positions where they do not overlap in the direction perpendicular to the tape running surface, the magnetic tape device can be made thinner.

Further, by driving the tape pull-out member and the reciprocating member with the same drive member, the magnetic tape is pulled out from inside the tape cassette to form a tape loop, and the first position of the pinch I-ler is set; The timing of the two movements to and from the second position can be set accurately and easily, and there is no need to adjust the timing when assembling the device, unlike when each is driven separately. The numbers will no longer be added.

Furthermore, since the reciprocating member has a locking means for the tape pull-out means, the tape pull-out means can be accurately positioned with respect to the pinch roller, and when a cam is used as the drive member, the cam can be rotated more than 360 degrees. It can also be driven by

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a front view of a pinch roller moving device according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a front view of a specific embodiment in a stopped state. Fig. 4 is a sectional view of the same essential part, Fig. 5 is a front view of the same showing fourteen other aspects, Fig. 6 is a sectional view of the same essential part, and Fig. 7 is a sectional view of the same essential part. The same front view showing the side, No. 8
9 is a front view of a conventional pinch roller moving device, FIG. 9 is a side view of the same, and FIG. 10 is a timing diagram showing the 1-degree movement of each cam portion of the drive member. ■... Board, 2... Capstan shaft,
3...Cab Skun flywheel, 4...
... Tape force cent, 5 ... Supply side reel stand, 6 ... Take-up side reel stand, 7 ... Rotating head drum, 8.11 ...・・Limiter post,
9.10... Inclined post, 12... Ru n staple, 14... Loading motor,
18... Drive member, 19... Reciprocating member, 20... Pinch arm, 22...
・Crimping member, 23...Pinch roller-129・
...Tape drawer arm. Name of agent: Patent attorney Toshio Nakao Haka1 person! -1, Plate 2---Capstan wheel 3, Capstan> Flywheel 4-1-Tape cassette No. 7 [174-...Loading motor 18-Hachi! 7 members lq--survival moving member 22--1 pressure bonding member 23--Troller 29-1-4 dowel door A 1-substrate 72-Magnetic tape 23--Pinch roller--Figure 10

Claims (1)

[Claims] tape pulling means for pulling out the magnetic tape from the inside of the cassette containing a pair of supply reel hub and take-up reel hub for winding the magnetic tape to the outside of the cassette; and a pinch that works with a capstan shaft to transport the magnetic tape. reciprocating the roller and the pinch roller between a first position that does not interfere with the tape pulling operation of the tape pulling means and a second position within the pulled out magnetic tape loop, and moving the tape pulling means to a predetermined position in the second position. A pinch roller moving device comprising a reciprocating member having a locking means for locking the reciprocating member at a position, and a drive member for driving the reciprocating member.