JPS60143472A - Tape loader - Google Patents

Abstract

PURPOSE:To obtain position accuracy of a tape guide post with simple constitution securely by abutting directly the lever part, which is a part of the tape guide post holding member which holds the second tape guide post, on the first tape guide post. CONSTITUTION:The first tape guide post 44c and an inclination post 49 move in the clockwise direction at a speed slower than that of a loading ring 40, and when a preceding tape guide post 44a arrives at the position shown in the figure, the 44c also arrives at the position shown in the figure, and after that, the 44a is fixed by the spring force of a press-contacting spring. The 44c is fixed by a V stopper 61. After that, rotation of the loading ring 40 is transmitted to an internal gear 42 through a planet gear 51, and it becomes the fixing force of the 44c by extending a spring 43. The second tape guide post 44d abuts on a lever part 58a of a guide post arm 58 and the head part of the 44c when the 44c approximates to the position of the figure, the arm 58 rotates in the counterclockwise direction since the 44c is fixed by the V stopper 61, and the arm 58 is fixed at the prescribed position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention involves pulling out a magnetic tape from a cassette having a built-in reel hub around which a magnetic tape is wound, and causing the magnetic tape to run attached to a rotating head drum installed outside the cassette. The present invention relates to a tape loading device for a recording/playback device such as a video tape recorder that records or plays back signals.

Conventional Structures and Their Problems In recent years, magnetic recording and reproducing devices such as cassette video tape recorders have been required to be smaller and lighter, and it is desired to further simplify the mechanism.

Hereinafter, the configuration of a conventional example will be explained using FIGS. 1 and 2. First, by mounting the cassette 1, the tape guide posts 2a, 2b, -2c, and 2d are installed.

2q, inclined post 3. The pinch rollers 4 are each inserted inside the magnetic tape 5 which has been passed as shown by the dashed dotted line in Figure 1. Next, installation of the cassette is detected by a switch (not shown), and the loading motor 6 rotates, transmitting rotation to the worm wheel 8 that meshes with the worm 7, and moves the loading ring 10 clockwise via pinion gears 9 and 12. Rotate. tape guide post) 2
a.

2b, 2c, 2g, 2d and the inclined post 3 are pulled out of the cassette 1 and fixed in a predetermined position by a loading ring. At this time, the tape guide post support member 11 (FIG. 2) that holds the tape guide post 2f is rotated counterclockwise by a lever 14 having a roller 16 corresponding to a cam portion 13 formed on the loading ring 10. fixed to form a predetermined tape path.

15 is a spring that applies rotational force to the tape guide post support member.

However, as mentioned above, as a means for rotating and fixing the tape guide support member, the output is taken from the cam part of the loading ring and is passed through a lever, so the positional accuracy of the tape guide post 2f is sufficiently ensured. This meant that there was a problem with the accuracy of parts assembly.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and an object of the present invention is to provide a tape loading device that has a simple configuration and can reliably obtain positional accuracy of a tape guide post.

Structure of the Invention In order to achieve the above object, the present invention is configured to record or reproduce signals by running the tape from a cassette containing a reel wound with tape attached to a head installed outside the cassette. The recording and reproducing device is a recording and reproducing device that pulls out the tape from the cassette by moving along a predetermined movement path, and includes a first tape guide post that guides the tape when the tape is running, and a first tape guide post that guides the tape while the tape is running; The second tape guide post is rotatable about a pivot shaft that is erected, and when the first tape guide post approaches a predetermined position, the first tape guide post is rotated. The above-mentioned second
The tape guide support member includes a tape guide support member configured to rotate the tape guide post to a position where the tape can run, and a spring that applies rotational force to the tape guide support member.

DESCRIPTION OF EMBODIMENTS Below, one embodiment of the present invention will be described with reference to the drawings (Figs. 3 to 10).
The explanation will be based on Figure).

First, the tape loading means will be explained. The cassette 31 is horizontally mounted and positioned on a plurality of positioning pins 33 provided on a substrate 32 such as a chassis. In addition, when installing this cassette, the front cover of cassette 31 (
(not shown) is opened. With this cassette installed, the magnetic tape 34 in the cassette 31 is bussed as shown by the dashed line in Figure 3. Also, by installing this cassette,
A supply reel 36 and a take-up reel 36 in the cassette 31 are engaged with a supply reel stand 37 and a take-up reel stand 38 disposed on the substrate 32, respectively. On the other hand, the rotary head drum 39 is arranged approximately at the center in front of the mounted cassette 31 so that the tape 34 exiting the rotary head drum 39 is tilted so that the tape 34 that has left the rotary head drum 39 advances perpendicularly to the substrate 32 and horizontally when the tape loading is completed. The ring 40 is arranged at an eccentric position on the outer periphery of the rotating head drum 39,
The internal gear 41 fixed on the base plate 32 is placed concentrically with the loading ring 4o. 042 is formed concentrically with the internal gear 41 and is placed on the base plate 32 so as to be slidable in the circumferential direction. Internal gear □A wheel that is always pulled in one direction by a spring 43. A main base 45 having two tape guide posts 44a and 44b for guiding the tape 34 is disposed above the loading ring 40 (see FIG. 6).
A hook 47 formed on the main base 45 is movably engaged with a loading guide 48 formed along the lead of the rotary head drum 39. There is. 1st
The subbase 5° having the tape guide post 44c and the inclined post 49 connects the loading ring 40 and the internal gear 4.
1, and is rotatably attached to the lower part of the sub-base 60. The planetary gear 51 is formed concentrically with gears with different numbers of teeth, and the gear with fewer teeth meshes with the loading ring 4o. A large number of gears mesh with the internal gear 41. The loading ring 40 is a pinion gear 52
The gear 54 is rotatable about a shaft 53 through the gear 53 and meshes with a gear 54 having a worm gear portion and a spur gear portion formed concentrically.

A gear 55 having a worm portion and a spur tooth portion formed coaxially with the worm portion meshes with the gear 64 and is rotatable around a shaft 57 fixed to a gear holder 56 provided on the base plate 32. and is attached so as to be slidable in the axial direction of the shaft 57.

59 is a guide post arm having a tape guide post) 44e, 60 is an erase head, and 61 is a sub base 5o.
This is a V stopper that fixes the tape when loading is completed. 62 is a pinion gear 5 attached to the spur gear portion of the gear 64.
2. A cam gear 64 that meshes with the relay gear 63 is a guide post drawer rond that has a rack portion that meshes with the gear portion of the guide post arm 59 and a cam follower pin 66 that corresponds to the cam of the cam gear 62. ,
When the gear 54 rotates in the tape loading mode, the cam gear 62 rotates, and as a result, the guide post arm 59 rotates clockwise and stops.

In Fig. 11, 58 is the second tape guide post) 4
The tape guide support member 58a holding the tape guide 4d is the first
This is the part of the lever that comes into contact with the tape guide post) 44c. 98 is a spring that applies a clockwise rotational force to the tape guide support member 58, and 99 is a rotation axis of the tape guide support member 58.

Next, the operation switching means for switching the operation mode of the device will be explained. A worm holder 66 is slidable using the shaft 57 as a guide, and is connected to an L-shaped lever 68 disposed on the base plate 32 so as to be rotatable about the pivot shaft 67 . 69 is a main rod, which has a cam portion that switches the supply reel soft brake 7°, the take-up reel soft brake 71, and the main brake 72 according to each operation mode, and also applies a predetermined tension to the tape 34 during recording and reproduction. It has a cam part that releases the tension regulator in a desired mode. 73 is a pinch lever that has a pinch roller 74 and is rotatable about a pivot shaft 76. 76 is a pinch pressure spring.

Next, the driving means for driving the gear 65 will be explained. 77 is a reduction gear formed coaxially with gears having different numbers of teeth, and meshes with the spur gear part of the gear 55. Reference numeral 78 denotes a pulley in which a gear part and a pulley part are coaxially formed, which meshes with the reduction gear 77 and drives the loading motor 80 via a belt 79.
The motor pulley 81 is interlocked with the motor pulley 81.

Next, a blocking means for blocking the gear 55 from sliding in the axial direction will be explained. 82 is a detent roller 83
It is a detent arm arranged so as to be rotatable coaxially with the pinion gear, and when the device is in tape loading mode, movement of the worm holder 66 is prevented by a detent roller 83.

Next, a description will be given of the blocking means which prevents the rotation of the gear 64 from sliding in the axial direction of the gear 66 from sliding 'ft1s11+I-dimension A. 84 is rotatable around a pivot shaft 85, has a detent roller 86 that rotates in contact with the inside of the loading ring 4o, and always has a detent spring 87.
This is a detent arm to which a clockwise rotational force is applied by.

Further, the pivot shaft 88 of the detent roller 86 corresponds to the slit portion 82a of the detent arm 82, and as shown in FIG. 10, when tape loading is started and the loading ring 4o rotates to the position where tape loading is completed, The detent roller 86 enters the cam groove 40a provided in the lob ring 40, the loading ring 4o is fixed, and as a result, the pinion gear 52 and gear 64 are also fixed. Further, the detent arm 82 that interlocks with the detent arm 84 rotates counterclockwise, and the worm holder 66 becomes movable.

Next, a part of the tension regulator will be explained. 8
Reference numeral 9 denotes a tension arm rotatably arranged around a rotation support shaft 90, and reference numeral 91 denotes a tension port that comes into contact with the magnetic tape 34 to detect tape tension when the tape is running. A tension band 92 is wound around the supply reel stand 37 and is used to apply a constant tape tension to the tape 34 during tape running. Reference numeral 93 denotes a sector gear, which is rotatably arranged around a pivot shaft 94, has a gear that meshes with a gear portion of the tension arm 89, and has cam bins 95a and 95b corresponding to the cam portion of the main rod 69. Both ends of the tension band 92 are rotatably mounted at different distances from the rotation support shaft 94, so that the brake torque applied by the tension band 92 during reverse playback is less than the brake torque applied by the tension band 92 during recording and playback. It is configured to be. Conventionally, one end of the tension band 92 is fixed on the substrate 32, and if reverse playback is performed in this state, the supply reel stand 37 cannot be rotated because the tension band 92 and the supply reel stand 37 are bitten, and the tape 34 cannot be wound.・When playing in reverse, it was necessary to forcibly release the tension band 92. Therefore, there was a problem in that a mode different from the recording/playback mode had to be provided, but by adopting the configuration shown in this embodiment, even if the supply reel stand 37 is rotated counterclockwise during reverse playback, the tension can be maintained. The magnetic recording and reproducing apparatus of this embodiment configured as above has the advantage that it is possible to prevent the occurrence of biting with the band 92, and there is no need to provide a reverse reproduction mode in the apparatus as in the conventional case. The operation will be explained below. First, the tape loading operation will be explained.Since the 0 cassette 31 is installed, the preceding tape guide post) 44a
~44f and inclined post 49, tension post 91,
Pinch rollers 74 are inserted inside each of the magnetic tapes 34 that have been passed in FIG. Next, the switch detects that the cassette is attached, and the loading motor 80 shown in FIGS. 7 and 8 rotates forward, and the pulley 78 and the reduction gear 7
7, and the rotation is transmitted to the gear 55.

At this time, the gear 65 is moved to the shaft 5 by the detent arm 82.
Movement in seven directions is blocked. Therefore, gear 55
The rotation is transmitted to the gear 54, and the loading ring 40 is rotated clockwise via the pinion gear 52. As a result, the tape 34 is caught on the preceding tape guide post 44a, and the tape 34 is caught on the tape guide post 44a.
The tape 34 is gradually drawn out of the cassette 31 as a moves. And the tape 34 that was pulled out
is gradually wound around the circumferential surface of the rotating head drum 39 from a clockwise direction. On the other hand, in synchronization with the clockwise rotation of the loading ring 40, the first tape guide post 44C and the inclined post 49, which are arranged on the sub base 6o by the planetary gear 61 and the internal gear 41, are rotated at a slower speed than the loading ring 4o. When the leading tape guide post (44a) moves clockwise and reaches the position shown in FIG.
The first tape guide post) 44c has also reached the position shown in FIG. 4, after which the tape guide post) 44a is fixed by the spring force of the compression spring 96 shown in FIG.

The first tape guide post) 44c is fixed by a stopper 61. Thereafter, the rotation of the loading ring 4o is transmitted to the internal gear 42 via the planetary gear 51, and by stretching the spring 43, the first tape guide host 4
It becomes the fixing force of 4C. Also, the second tape guide post 4
When the first tape guide post 44c approaches the position shown in FIG. 4, the lever portion 58a of the guide post arm 58 comes into contact with the head of the tape guide post 44c, and 44C is fixed to the stopper 61, the guide post arm 58 is rotated counterclockwise and fixed at a predetermined position. Regarding the tape guide post 44e, when the gear 54 rotates, the cam gear 62 rotates, and the cam of the cam gear 62 moves the guide post pull-out rod 64, which causes the guide post arm 69 to rotate counterclockwise. , tape guide post) 44c is fixed, it stops and is fixed at that position. When the loading ring 4o rotates to the position where the springs 43.96 sufficiently press each tape guide post, the detent roller 86 moves into the cam groove 40 of the loading ring 40, as shown in FIG.
a, the rotation of the loading ring 40 is stopped, and the loading ring 4o is locked at that position. At this time, as explained earlier, the detent roller 8
The prevention of sliding of the warm holder 66 of No. 3 is released. Therefore, due to the screw effect between the gears 54 and 56, the gear 55 starts to slide, and as a result, the main rod 69 moves to the right, the tension arm 89 is moved to the position shown in FIG. 4, and the main rod 69 is moved to the right. A brake 72 brakes the take-up reel stand 38 and the supply reel stand 37. At this time, the completion of loading is detected by the switch, the rotation of the loading motor 8o is stopped, and the loading is completed.

Next, the pinch roller crimping operation will be explained.

When the loading motor 80 is further rotated in the forward direction from the loading completion state, the gear 65 further moves as shown in FIG. Crimp to 97. In addition, some parts of the fast-forwarding mode are connected to the gear 55.
The mode is set between the loading completion mode and the pinch crimping mode by making 7 rides.

In the figure, 449.44h is a tape guide post, 98 is a reel motor, and 99 is an idler.

Effects of the Invention As described above, according to the present invention, in order to ensure the positional accuracy of the second tape guide post that forms a predetermined tape path, the tape guide post holding member that holds the second tape guide post is provided. It has a simple configuration in which a part of the lever, which is a part of the tape guide post, is brought into direct contact with the first tape guide post to ensure positional accuracy, making it possible to achieve sufficient tape path accuracy. .

[Brief explanation of drawings]

FIG. 1 is a plan view of a conventional magnetic recording and reproducing device, FIG. 2 is an enlarged view of the main parts of a conventional magnetic recording and reproducing device, and FIGS. 3 to 5 show a tape loading device according to an embodiment of the present invention. 6 is an enlarged perspective view of the main parts of the same embodiment, FIGS. 7 and 8 are front and side views of the drive unit of the same embodiment, and FIGS. 9 and 10 are The figure is a plan view of the blocking means and release means of the same embodiment, and FIG. 11 is an enlarged view of the main part of the same embodiment. 1... Cassette, 2... Tape guide post, 3... Inclined post, 4... Pinch roller, 5... Magnetic tape, 6...
・Loading motor, 7... Worm, 8
...Worm wheel, 9.°pa pinion gear, 10...Loading ring, 11...
...Tape guide post support member, 12...
Pinion gear, 13...Cam, 14...
・Lever, 15... Spring, 16... Roller, 31... Cassette, 32...
Board, 34... Tape, 35... Supply reel, 36... Take-up reel, 39...
Rotating head drum, 4o...Loading ring, 41.42...Internal gear, 43...Spring, 44a-44h...Tape guide post, 44C... ...first tape guide post,
45... Main base, 46... Connecting rod, 47... Hook, 48... Loading guide, 49... Inclined post, 5Q
...Sub base, 61 ... Planetary gear,
62...Pinion gear, 53...Shaft,
64.55...Gear, 56...Gear holder, 57...Shaft, 58...Tape guide support member, 58a...Lever Department, 59...
...Guide host arm, 60...Erase bottom, 61...■ Stopper, 62...
...Cam gear, 63...Relay gear, 64...
...Guide post pull-out rod, 65...
Cam follower bin, 66... Worm holder, 68... L-type lever, 69...
Main rod, 70... Supply reel soft brake. 71...Take-up reel soft brake, 72...
... Main brake, 73 ... Pinch lever, 74 ... Pinch roller -176 ...
・Pinch crimp spring, 77...Reduction gear,
γ8...Pulley, 79...Belt, 8
0...Loading motor, 81...
・Motor pulley, 82... Detent arm, 83... Detent roller, 84...
... Detent arm, 86 ... Detent roller, 87 ... Detent link, 89
...Tension arm, 91...Tension post, 92...Tension band, 9
3...Sector gear, 95a, 95b...
...Cambin, 96...Crimp spring, 97
...Capstan, 98 ...Spring, 9
9...Rotation axis. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 324 Figure 2 Figure 6 Figure 4q Figure 7, 57. 5i'? Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] A recording and reproducing device configured to record or reproduce signals by running the tape from a cassette containing a reel wound with a tape attached to a head installed outside the cassette, the device a first tape guide post that guides the tape when the tape is running;
When the second tape guide post is held and the first tape guide post approaches a predetermined position, the second tape guide post is held by a lever part that abuts a part of the first tape guide post. A tape guide support member configured to rotate a tape guide post to a position where the tape can run, and a spring that applies a rotational force to the tape guide support member.