JPH0715769B2 - Pinch roller moving device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention extracts a magnetic tape from a tape cassette,
Make it run with a magnetic head located outside the cassette,
The present invention relates to a pinch roller moving device of a magnetic tape device that records and reproduces signals.

2. Description of the Related Art In a conventional magnetic tape device such as a video tape recorder, for example, as shown in Japanese Patent Publication No. 59-27983, the capstan shaft 2 is located at the opening of the tape cassette 4 as shown in FIG. The structure is such that the tape cassette 4 and the capstan flywheel 3 overlap in the height direction of the device as shown in the side view of the device in FIG. Also, instead of a capstan flywheel, a direct drive capstan motor that directly drives the capstan is also provided, but in order for the capstan shaft to enter the opening of the tape cassette, The direct drive capstan motor is configured to overlap in the height direction of the device.

However, in the case of such a configuration, when the capstan flywheel 3 and the tape cassette 4 overlap in the height direction of the device, the tape cassette is thinned when the magnetic tape device is thinned. There is a drawback in that the dimension of the thickness of No. 4 and the thickness of the capstan flywheel 3 is the minimum height of the device, and it is impossible to make the device thinner than the height.

Further, there has been proposed a structure in which the capstan 2 is arranged at a position distant from the tape cassette 4 and the pinch roller 23 is moved from the outside of the tape loop to the inside of the tape loop. The roller moving means and the pinch roller pressure contacting means with respect to the capstan are separately driven, and the magnetic tape may be damaged when the operation timings of the three means are deviated.

Therefore, according to the present invention, as shown in FIG. 1, the capstan flywheel 3 and the capstan shaft 2 are arranged at a position where the tape cassette 4 does not overlap in the height direction of the apparatus.
As shown in the figure, the capstan flywheel portion of the substrate 1 is raised to a position where it does not interfere with the pulling out of the magnetic tape 12 and the running of the magnetic tape 12, and in order to realize a thin magnetic tape device, the magnetic tape The pinch roller 23 is moved from the outside of the loop to the inside of the magnetic tape loop, and the only drive is to pull out the magnetic tape, move the pinch roller 23 into the tape loop, and press the pinch roller 23 into the capstan. This is done by members.

Means for Solving the Problems In order to solve the problems, the pinch roller moving device of the present invention is configured to remove a magnetic tape from a cassette containing a pair of supply reel hubs and a reel reel hub for winding the magnetic tape. A magnetic tape device for recording and reproducing a signal by pulling out to the outside of a cassette and running along with a magnetic head located outside the cassette, and a tape pulling member for pulling a magnetic tape from the inside of the cassette to the outside of the cassette, and a capstan shaft. A pinch roller for transferring the magnetic tape in cooperation with the magnetic tape, and a magnetic tape pulled out at a first position different from the magnetic tape in the height direction, the pinch roller not interfering with the tape pulling operation of the tape pulling member. A reciprocating member that reciprocates between the second position in the loop and the second position in the loop, and the cap from the second position. A pressing member that drives a pinch roller to a third position that presses the magnetic tape on the push-stan shaft, and a tape pulling member that drives the magnetic tape from a position inside the cassette to a position outside the cassette to form a tape loop. The second cam portion for driving the first cam portion and the reciprocating member to move the pinch roller from the first position to the second position, and the pressing member for driving the pinch roller to the first position. The second drive member has a third cam portion that moves the second position to the third position.

Effect of the Invention With the above-described structure, the present invention enables the capstan shaft to be arranged at any position where the capstan flywheel and the magnetic tape cassette do not overlap in the height direction of the device, and the magnetic tape can be pulled out into the tape loop. It is possible to accurately set the switching operation between the movement operation of the pinch roller and the pressure contact operation of the pinch roller to the capstan shaft.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 3 shows an embodiment of the present invention.
The figure shows a side cross-sectional view of one embodiment of the present invention. In FIGS. 3 and 4, the loading motor 14 that drives the pinch roller 23 is fixed to the substrate 1. A spur gear 16 that rotates integrally with the shaft 15 of the loading motor 14 meshes with a gear portion 18a of a drive member 18 that is rotatably supported by a shaft 17 planted on the substrate 1. The drive member 18 abuts on a first end surface 27a of a turning lever 27 rotatably supported by a shaft 21 planted on the base material 1,
A second end cam portion 18e that presses the end surface 27a of the above and the shaft 17 is loosely fitted, and is guided by the shaft 17 and abuts on a protrusion 19a of an elevating member 19 which is movable in a substantially vertical direction with respect to the substrate 1, After the groove cam portion 18b for raising and lowering the elevating member 19 and the pinch roller 23 have moved to predetermined positions, the protrusion portion 22a of the crimp lever 22 for crimping the pinch roller 23 to the capstan 2
It has a first end surface cam portion 18d that abuts against the projections 22a and presses the projections 22a. The outer peripheral boss portion 20a of the rotating arm 20 that is rotatably engaged with the shaft 21 is the inner peripheral surface 2 of the pressure bonding lever 22.
A hole 19 that is loosely fitted in 2c and is provided at one end of the elevating member 19.
It is loosely fitted in b and is supported by the hole upper end surface 22d of the pressure bonding lever 22, and the pressure bonding lever 22 is supported by the hole upper end surface 19c of the elevating member 19. Therefore, when the elevating member 19 is guided by the shaft 17 and moves upward or downward, the crimping lever 22 and the rotating arm 20 are guided by the shaft 21 and move upward or downward integrally with the elevating member 19. As shown in FIG. 3, a spring hook 22 of the crimp lever 22 is provided.
A stopper provided on the crimping lever 22 by tensioning a tension spring 25 between e and the spring hook 20b of the rotating arm 20.
By providing the end surface 20c of the rotating arm 20 to 22b, the crimping lever 22 and the rotating arm 20 are integrated,
It is designed to rotate together. Further, the protrusion 22a of the crimping lever 22 is constantly pressed by the biasing spring 24 against the outer peripheral surface of the drive member 18, and after the elevating member 19 descends and is located at the lowermost end, the protrusion 22a is First end cam portion 18d
The pressing lever 22 is constantly pressed by and is guided by the first end surface cam portion 18d, whereby the crimping lever 22 rotates about the shaft 21. Further, the rotating arm that rotates integrally with the full crimping lever 22.
A pinch roller 23 is rotatably supported on a shaft 32 planted at the end of 20. On the other hand, the shaft planted on the substrate 1
At one end of a guide post arm 29 rotatably supported by 28, the guide post 31 for pulling out the magnetic tape 12 is provided.
Is planted in the second end surface 27 of the rotary lever 27 at the other end.
A pin 30 that comes into contact with b is planted, and the second end surface 27b of the rotating lever 27 presses the pin 30, whereby the guide post arm 29 rotates about the shaft 28. The groove cam portion 18b, the second end surface cam portion 18e, and the first end surface cam portion 18d are
As shown in FIG. 10, the lift amount is changed within a certain rotation angle range.

Now, when the counterclockwise rotation of the loading motor 14 is transmitted to the drive member 18 through the spur gear 16, the drive members 18 rotate clockwise, and when the rotation angle reaches 34 °,
The rotation lever 27 is rotated counterclockwise about the shaft 21 by the pressing of the second end surface cam portion 18e, and the guide post arm 29 abutting on the rotation lever 27 is rotated clockwise about the shaft 28. As a result, the guide post 31 pulls out the magnetic tape 12 to a predetermined position as shown in FIG. 5, and the guide post 31 is locked. When the drive member 18 continues to rotate up to 74 °, the elevating member 19, which is in contact with the groove cam portion 18b, the crimping lever 22, and the rotating arm 20 are integrated into the magnetic tape 12.
The pinch roller 23, which descends substantially perpendicularly to the running surface of and is supported by the end of the rotating arm 20, from a position that does not hinder the magnetic tape 12 pulling out operation of the guide post 31, as shown in FIG. It descends substantially perpendicularly to the running surface of the magnetic tape 12 shown in FIG. 6 and is positioned inside the magnetic tape loop formed by the pulling operation of the magnetic tape 12 of the guide post 31 as shown in FIG. When the drive member 18 continues to rotate further, the drive member 18 is pressed by the second end face cam portion 18d and is pressed by the pressure bonding lever 22.
Also, the rotating arm 20 integrally rotates clockwise around the shaft 21, and the pinch roller 23 contacts the capstan 2 while the rotation angle of the driving member 18 reaches 275 °.
Rotation is blocked, and only the crimp lever 22 continues to rotate after that.
When the rotation angle of the driving member 18 reaches 275 °, the pinch roller 23 is pressed against the capstan 2 so that a predetermined pressure is applied to the capstan 2. is there. Even if the drive member 18 rotates over a rotation angle of 275 °, the lift amount of the first end surface cam portion 18d does not change, so that the pinch roller 23 is maintained in a pressure-bonded state with respect to the capstan 2 and the capstan drive motor (see FIG. The magnetic tape 12 is transferred by the cooperation of the capstan 2 and the pinch roller 23, which are rotationally driven by the motor as a result of rotation of the magnetic tape 12.

Advantageous Effects of Invention The pinch roller moving device of the present invention is a magnetic head that is located outside the cassette by pulling the magnetic tape out of the cassette from a cassette that incorporates a pair of supply-side reel hub and winding-side reel hub that wind the magnetic tape. A magnetic tape device for recording and reproducing signals by splicing and traveling, wherein a tape drawing member for drawing the magnetic tape from the inside of the cassette to the outside of the cassette, and a pinch roller for transferring the magnetic tape in cooperation with a capstan shaft. A pinch roller having a first position in the height direction different from the magnetic tape that does not hinder the tape pulling operation of the tape pulling member, and a second position in the loop at substantially the same height as the pulled magnetic tape. A reciprocating member that reciprocates between the second position and a third position that presses the magnetic tape from the second position to the capstan shaft. A pressing member for driving a pinch roller, a first cam portion for driving the tape pulling member from a position inside the cassette to a position for forming a tape loop by drawing a magnetic tape outside the cassette, and the reciprocating member. To drive the pinch roller from the first position to the second position and the pressing member to drive the pinch roller to move the pinch roller from the second position to the third position.
A magnetic tape device, such as a video tape recorder, in which only one of the capstan shaft and the pinch roller is a tape cassette. At the opening of the magnetic tape, it is not necessary to enter the loop of the magnetic tape, and the capstan shaft is connected to the capstan flywheel or the capstan direct drive motor or the pinch roller supporting member and the tape cassette with respect to the tape running surface. Since the magnetic tape devices can be arranged at positions that do not overlap each other in the vertical direction, the magnetic tape device can be made thin.

Further, the operation of pulling out the magnetic tape from the inside of the tape cassette to form a tape loop, the reciprocating movement of the pinch roller between the first position and the second position, and the second position to the third position
It is possible to accurately and easily set the timing of the three operations of reciprocating movement with respect to the position, and there is no need to adjust the timing when assembling the device as in the case where they are driven separately, and the dimensional error of the component is No more numbers will be added.

[Brief description of drawings]

FIG. 1 is a front view showing the arrangement of a capstan shaft of the present invention, FIG. 2 is a side view showing the effect of the present invention, and FIG.
4 is a front view showing one mode, FIG. 6 is a front view showing a stop mode, FIG. 4 is a front view showing one mode, FIG.
Drawing is a front view showing one mode, Drawing 8 is a front view showing the conventional composition, Drawing 9 is a side view showing the conventional composition, and Drawing 10 shows the timing of each cam part of a drive member. It is a figure. 1 ... Substrate, 2 ... Capstan shaft, 3 ... Capstan flywheel, 4 ... Tape cassette, 5 ... Supply side reel stand, 6 ... Winding side reel stand, 7 ... Rotating head drum, 8,11 …… Limiter post, 9,10 …… Inclined post, 12 …… Magnetic tape, 14 …… Loading motor,
18 …… Drive member, 19 …… Reciprocating member, 20 …… Pinch arm, 22 …… Crimping member, 23 …… Pinch roller, 29 ……
Tape drawer arm.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Minabe 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Kaoru Matsuoka, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References Japanese Unexamined Patent Publication No. 61-94256 (JP, A) Actually opened 51-83310 (JP, U) Actually opened 50-110210 (JP, U) Actually opened 50-108408 (JP, U) Actual Kai-sho 50-147606 (JP, U) Japanese Patent 6-41919 (JP, B2) Japanese Patent 3-73064 (JP, B2) Japanese Patent 57-32421 (JP, B2) Japanese Patent 51-5769 (Japanese) JP, B2) Japanese Patent Publication 3-19631 (JP, B2)

Claims (1)

[Claims] 1. A magnetic tape is pulled out of the cassette from a cassette containing a pair of supply-side reel hub and winding-side reel hub around which the magnetic tape is wound, and the magnetic tape is run by being attached to a magnetic head located outside the cassette. A magnetic tape device for recording and reproducing, wherein a tape pull-out member for pulling out the magnetic tape from the inside of the cassette to the outside of the cassette, a pinch roller for transferring the magnetic tape in cooperation with a capstan shaft, and the pinch roller are provided. A reciprocating movement that reciprocates between a first position that differs from the magnetic tape in the height direction that does not hinder the tape drawing operation of the tape drawing member and a second position in the loop at substantially the same height as the drawn magnetic tape. A moving member and a pressing member that drives a pinch roller from the second position to a third position that presses the magnetic tape on the capstan shaft. A timber, a first driving into position to form a tape loop, the tape drawer is pulled out the magnetic tape to the cassette outside from a position inside the cassette
Second cam for driving the cam portion and the reciprocating member to move the pinch roller from the first position to the second position.
Pinch roller moving device having a cam portion and a third driving portion that drives the pressing member to move the pinch roller from the second position to the third position.