JPH0138765Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a strip-tape guide mechanism, and more particularly, a strip-tape guide having a configuration in which a tape loading strip and a tape pulled out from a cassette are guided by the same pole structure. The purpose is to provide a mechanism.

2. Description of the Related Art There is an apparatus in which a tape is pulled out from a cassette and loaded into a predetermined path attached to a drum, in which a loading pole is moved by driving a timing belt or the like. This type of device requires a belt guide pole for guiding the timing belt in addition to a tape guide pole for guiding the tape pulled out from the cassette. In conventional devices, the belt guide pole and the tape guide pole are distributed at different positions on a plane. Therefore, the installation space is required, making it difficult to miniaturize the recording and reproducing apparatus, and the number of parts increases.

The present invention has a configuration in which the same pole structure is provided in conjunction with a belt guide and a tape guide.
The above drawbacks have been eliminated, and one embodiment thereof will be described below with reference to the drawings.

Figures 1 and 2 show the belt-shaped body of the present invention, respectively.
The states of the recording and/or reproducing apparatus 1 to which the tape guide mechanism is applied are shown in the stop mode and in the recording and reproducing mode. This recording/reproducing apparatus 1 is roughly constructed by providing a guide drum 3, a cassette mounting section 4, etc. on a chassis 2, and further providing a tape loading mechanism 6, shown separately in FIG. 3, on the upper and lower surfaces of the chassis. This recording and reproducing apparatus 1 is a dedicated machine for the small cassette 10 shown in FIG. 4, and is smaller than the recording and reproducing apparatus for standard type cassettes.

A small cassette 10 shown in FIG. 4 is attached to this recording/reproducing apparatus 1. As shown in FIG. This small cassette 10
As shown in the figure, the cassette casing 12 is made up of a cassette casing 12 containing a magnetic tape 11, and a lid 13 which is provided on the front side of the cassette casing 12 so as to be openable and closable and which is normally closed. As shown in FIG. 1, the cassette housing 12 includes a small-diameter supply reel 14 and a take-up reel 15.
are placed side by side. The supply reel 14 is exposed through an opening 16 at the bottom of the cassette housing 12. The outer periphery of this lower flange of the take-up reel 15 is the gear part 1.
7, and a portion of this gear portion 17 is exposed through a side window 18 of the cassette housing 12. The magnetic tape 11 is attached to guide poles 19a, 19 on the left and right ends.
b, forming a tape path 11A along the front surface of the cassette housing 12. Furthermore, transparent tape portions (not shown) of a predetermined length are provided at both ends of the magnetic tape 11 to be detected by tape end detection means. This transparent tape portion is detected by a tape end detection device 5 comprising a light emitting source 130 and an end sensor 133 and a start sensor 134 facing thereto. This tape end detection operation is for tape 1
1 forms a loop 11B.

The tape loading mechanism 6 of the recording/reproducing apparatus 1 and related mechanisms will now be described with reference to FIG. 5.

The tape loading mechanism 6 includes timing gears 20, 2
1 rotates, the timing belt 22,
23 is running, loading poles 24, 25
is configured to move along the guide grooves 26, 27 of the chassis 2 from the position shown in FIG. 1 to the loading completion position shown in FIG. 2, and to load the tape into a predetermined tape path.

The timing gears 20 and 21 are superimposed with the main gear 28 in the center, the cam disc 29 at the top, and the angle detection disc 30 at the bottom, so that the main gear 28 corresponds to the horizontal position of the chassis 2, and the gears 20 and 21 correspond to the horizontal position of the chassis 2, respectively. The shaft 31 is rotatably fitted to the shaft 31 in a height relationship in which the lower side and the upper side of the shaft 2 are opposite to each other. Cam board 2
9 and the angle detection board 30 are the main gear 28 and pin 3.
2, and a timing gear 20, 2.
1 is connected to the pin 32 by coil springs 33 and 34, and the cam disk 29, angle detection disk 30, and timing gears 20 and 21 are substantially integrated with the main gear 28, and rotate clockwise during loading and counterclockwise during unloading. It is rotated approximately 360 degrees.

The timing belt 22 is connected to the timing gear 20
and guide rollers 35 to 38, with one end directly connected to the loading pole support 39 and the other end connected to the same support 39 via a coil spring 40.
9 to form a closed loop along the lower surface of the chassis 2. Another timing belt 23 includes a timing gear 21, a guide roller 41,
42, is stretched along the guide pole 43 and the stop pole 44, one end is directly connected to the loading pole support 45, the other end is connected to the same support 45 via a coil spring 46, and the chassis 2
A closed loop is formed along the top side of the . The supports 39 and 45 are fitted into the guide grooves 26 and 27, respectively, so as to be movable along the guide grooves 26 and 27.

A substantially spiral cam groove 47 is formed in the cam disc 29. This rotation of the cam disk 29 causes the audio control head 48 and the pinch roller 4 to
9 is moved as described below. Before loading the tape,
As shown in FIG.
The pinch roller 49 is located further back so as not to interfere with the tape loading operation, and the pinch roller 49 is separated from the cassette loading section. The head 48 is mounted on the tip of a support arm 51 that is pivotally supported on a shaft 50. The auxiliary arm 52 is pivotally supported by a pin 54 on the support arm 51, and has a pin 55 at its tip. The pin 55 fits into the cam groove 47. Further, a pin 56 of the auxiliary arm 52 is fitted into an elongated hole of the support arm 51. A torsion spring 57 is provided between the support arm 51 and the auxiliary arm 52, and the spring 57 biases the auxiliary arm 52 in a counterclockwise direction. Also, the bell crank lever 58 is attached to the mounting plate 59.
It is pivotally supported by the upper pin 60, and the pin 61 of the lever 58 fits into the cam groove 47. 62 is a roller that prevents the belt 23 from coming off.

The angle detection board 30 has a reflection plate 6 of a predetermined shape on the bottom surface.
3 is attached. Three light-emitting/light-receiving elements 64, 65, and 66 are fixed on a base facing the reflecting plate 63. The reflecting plate 63 and the elements 64 to 66 cooperate to detect the rotation angle positions of the detection plate 30, that is, the cam plate 29, and the timing gears 20 and 21, and control tape loading operations and the like.

Next, the operation of the recording/reproducing apparatus 1 having the above configuration will be explained.

The small cassette 10 is inserted into the housing 70, moved down, and mounted on the cassette mounting portion 4 as shown in FIG. The lid 13 is opened by the opening mechanism 71 as shown in FIGS. 2 and 4, and the supply reel 14 or the supply reel stand 72 is fitted, and the take-up reel 15 has its gear portion 17 used for tape winding. It meshes with the small diameter gear 73a of the take gear body 73. Furthermore, loading poles 24, 25, tension pole 7
4 and the capstan 75 relatively enter into the front cutout of the small cassette 10.

Next, when a recording or playback operation is performed, the loading motor 76 starts, and the belt 77 and worm 7
8, via the worm gear 79 and the drive gear 80,
The timing gears 20, 21, the cam disk 29, and the angle detection disk 30 rotate clockwise (arrow _A1 direction) together with the main gear 28.

Due to the rotation of the timing gears 20 and 21, the timing belts 22 and 23 run in the directions of arrows B and C, and the support stands 39 and 45 move into the guide grooves 26 and 27, respectively.
move along. At this time, poles 24 and 25
locks the magnetic tape 11 and inserts it into the cassette 10.
Bring out more. The support stand 39 moves pushing aside the impedance roller 81, and finally the loading pole 24 is pressed against the stopper 82. The impedance roller 81 and the full-width erasing head 83 are mounted on a rotating support base 85 supported by a pole 84.
Both are positioned by a coil spring 86 and a stopper 87. The support stand 45 moves past the front side of the head 48 which is in the retracted position, and finally the loading pole 25 is pressed and locked to the stopper 88.

Also, due to the rotation of the cam disc 29, the loading pole 25 passes in front of the head 48, and then the pin 5
5 is guided by the cam groove 47 and displaced toward the outer circumference of the cam disc 29. As a result, the support arm 51 and the auxiliary arm 52 rotate together in the clockwise direction, and the head 48 approaches the magnetic tape 11 drawn out of the small cassette 10 and attaches thereto. Eventually, as shown in FIG. 2, the auxiliary arm 52 rotates independently of the support arm 51, and the support arm
1 is biased clockwise by the spring force of the torsion spring 57 and presses against the stop pole 44, and the head 48 is positioned.

Further, due to the rotation of the cam disc 29, the lever 58 rotates the pin 61 counterclockwise with the pin 61 guided by the cam groove 47, and the pinch roller support arm 92 is rotated counterclockwise about the shaft 93 via the connecting levers 90, 91. The pinch roller 49 rotates clockwise, and the pinch roller 49
Crimp to 5. The pressing force of the pinch roller 49 against the capstan 75 is obtained by the spring force of the coil spring 94 between the levers 90 and 91.

Further, due to the rotation of the support arm 51, the L-shaped lever 101 is moved to the shaft 102 via the lever 100.
The string 103 is loosened, and the L-shaped lever 104 is rotated clockwise by the spring 105. The string 103 is guided by guide rollers 106 and is mounted at right angles along the periphery of the device, and is connected to the lever 101 and the L-shaped lever 104.
are connected. As the lever 104 rotates, the tension arm 107 is rotated counterclockwise about the shaft 109 by the spring 108, the tension pole 74 reaches the operating position, and the brake band 110 is tensioned.

As a result, the recording/reproducing apparatus 1 enters the state shown in FIG. 2, and the magnetic tape 11 pulled out from the supply reel 14 is attached to the fixed guide pole 111, the tension pole 74, and the full-width erasing head 83, and then the impedance roller Attached to 81. The magnetic tape 11 is further helically attached between poles 24 and 25 to the circumferential surface of a guide drum 3 having a rotating video head. Tape 11 is guide drum 3
A rotating video head records or reproduces video signals while traveling along the vehicle.

Tape 11 released from attachment to guide drum 3
is attached to the audio control head 48, guided by the guide roller 112, driven to be pinched by the pinch roller 49 and the capstan 75, enters the cassette 10, and is taken up on the take-up reel 15. Capstan 75 is rotated by capstan motor 113.

In addition, as the reel drive motor 120 on the lower side of the cassette mounting section 4 rotates clockwise, the oscillating idler 121 that is in pressure contact with the rotating shaft 120a is rotated clockwise.
moves by rolling on the idler movement assisting plate 122, and comes into pressure contact with the intermediate gear 123 meshing with the large diameter gear 73b of the gear body 73. As a result, the rotation of the motor 120 is controlled by the idler 121 and the intermediate gear 12.
3. It is transmitted to the take-up reel 15 via the gear body 73, which rotates clockwise to wind up the tape.

Furthermore, the plunger solenoid 125 is energized and the sliding plate 126 moves to the left. As a result, the brake shoes 127 and 128 are separated from the supply reel stand 72 and the gear body 73, respectively, and the braking is released.

When a stop operation is performed during the recording/reproduction mode, each mechanism that operated during the tape loading operation operates in the reverse direction in the reverse order to the loading operation, and an unloading operation is performed.

Next, an embodiment of the band-tape guide mechanism according to the present invention applied to the recording/reproducing apparatus described above will be described with reference to FIGS. 6 and 7.

The timing belt-tape guide pole structure 140, which is an embodiment of the mechanism of the present invention,
Above, magnetic tape 1 pulled out from cassette 10
1 and the timing belt 23 intersect in a plan view, and a timing belt guide part is provided at the lower part and a magnetic tape guide part is provided at the upper part on the same axis. The pole member 141 is screwed onto the chassis 2 by screws 142 from the bottom side of the chassis.
It is planted on top. This pole member 141 has a pole portion 14 at the bottom which functions as a guide pole 43.
1a and a flange portion 141b, and further includes a flange portion 141b.
It consists of a pin portion 141c that protrudes further upward and has a threaded upper portion. The guide roller 112 is rotatably fitted into this pin portion 141c. The guide roller 112 is provided with its height adjusted by a lower coil spring 143 and an upper locking nut 144.

The timing belt 23 is guided by a pole portion 141a (guide pole 43), and the magnetic tape 11 is guided by a guide roller 112.

For this reason, the guide poles 43 and guide rollers 112, which are generally distributed, are coaxially arranged and placed together in one place on the plan view, so the installation space for one is omitted. Therefore, the recording and reproducing apparatus can be made smaller. Further, the pin portion 141a of the pole member 141 is connected to the guide roller 112.
Since it functions as a shaft for the guide roller 112, there is no need to separately prepare a shaft member for the guide roller 112, and the number of parts can be reduced accordingly.

FIG. 8 shows a modification of the mechanism of the present invention. This timing belt-tape guide structure 150 can be applied when the timing belt is mounted on the lower surface side of the chassis 2, and the pole member 151 installed through the chassis 2 is commonly used. A timing belt guide roller 152 is installed at the bottom as a shaft, and a magnetic tape guide roller 153 is installed at the top.
is provided. This structure 150 has the same effects as the timing belt-tape guide structure 140 described above.

As mentioned above, the strip-tape guiding mechanism according to the present invention is a device that moves a loaded strip to move a loading member, pulls out a tape from a cassette, and loads the tape into a predetermined path. is disposed at a predetermined position on the chassis, and the pole structure guides both the strip and the tape pulled out of the cassette. They can be placed together in the same location on the plan view, which is advantageous in downsizing the recording and reproducing device.In addition, each guide section requires only one pole, which reduces the number of parts used. have

[Brief explanation of the drawing]

Figures 1 and 2 show the belt-shaped body of the present invention, respectively.
A plan view showing the state of a recording and reproducing apparatus to which an embodiment of the tape guide mechanism is applied before loading the tape and the state in the recording and reproducing mode after the tape loading is completed;
FIG. 3 is a perspective view showing the tape loading mechanism taken out from FIG. 1, FIG. In the figure, a perspective view showing an exploded structure of the timing gear part, FIGS. 6 and 7 are a perspective view and a cross-sectional view showing the band-tape guiding mechanism of the present invention, and FIG. 8 is a perspective view of the mechanism of the present invention. It is a sectional view showing a modification of . 1...Recording/reproducing device, 3...Guide drum, 6
...Tape loading mechanism, 10...Small cassette, 1
1... Magnetic tape, 14... Supply side reel, 15
...Take-up reel, 20,21...Timing gear, 22,23...Timing belt, 24,2
5... Loading pole, 26, 27... Guide groove, 29... Cam disc, 43... Guide pole, 4
8...Audio control head, 49...
...Pinch roller, 75...Capstan, 76...
...Loading motor, 83...Full-width erasing head, 112...Guide roller, 140, 150...
...timing belt-tape guide pole structure,
141, 151... Pole member, 141a... Pole portion, 142... Screw, 143... Coil spring, 144... Locking nut, 152... Timing belt guide roller, 153... Magnetic tape guide roller.

Claims (1)

[Scope of utility model registration request] In a device that moves a loaded strip to move a loading member, pulls the tape out of a cassette, and loads it in a predetermined path, a pole structure is disposed at a predetermined position on the chassis, and the pole structure allows A strip-tape guide mechanism configured to guide the strip and the tape pulled out of the cassette together.