JP3128483B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus which can selectively mount two types of tape cassettes having different outer dimensions (length × width × depth) and reel intervals.
The present invention relates to a positioning mechanism for positioning a reel base at two positions.

[0002]

2. Description of the Related Art FIG.
An apparatus having a configuration as shown in FIG. 7 is disclosed in, for example, Japanese Unexamined Patent Publication No. 7-29250 (G11B 15/3).
It is disclosed in 2). 6 shows a plan view when a small tape cassette is mounted, and FIG. 7 shows a plan view when a large tape cassette is mounted. Now, when the small cassette 100 is mounted from the state shown in FIG.
Rotates in the counterclockwise direction (CCW), and the drive pin 101a of the swing driving body rotates the swing arm 102 toward the CCW about the support shaft 102a. The pin 103 of the interlocking arm 103 that is loosely fitted in the substantially central elongated hole 102b of the swing arm 102
The guide arm is guided by a shaft 104a of a chassis (not shown) in the elongated hole 103b of the interlocking arm 103 through the a, and the interlocking arm 103 moves upward in the drawing. With the pins 103c and 103d fixed at both ends of the interlocking arm 103, the reel base holding levers 107 and 108 which rotatably support the reel bases 105 and 106 are pivoted to the chassis shafts 104b and 104c.
6 in the CW and counterclockwise directions (CCW), respectively, and come into contact with the stoppers 109a and 110a to be positioned, resulting in the state of FIG. Note that 111 is the swing arm 10
This is a limiter mechanism that moderately holds 2 at two positions. When the large tape cassette 200 is mounted, the operation reverse to that described above is performed, and the state shown in FIG. 7 is obtained.

[0003]

The above-mentioned apparatus has a large component, a large number of components, and a complicated structure for moving the reel base to two positions. Furthermore, a dedicated limiter mechanism is required as a reel base positioning and pressing mechanism, which hinders miniaturization of the apparatus. In view of the above, an object of the present invention is to provide a reel base moving device that performs a reliable crimping operation with a small number of components in a small space.

[0004]

According to the present invention, there is provided a magnetic recording / reproducing apparatus having a reel base moving mechanism capable of mounting a plurality of types of tape cassettes having different reel intervals. A pair of rotating members that are urged in the direction to rotatably support the reel base, a slide body that rotates the rotating member and positions the reel base at two positions, and a slide body that is driven by a driving source. And a driving force transmitting means for driving the reel base, and a pressing force applying means for positioning and pressing the reel base at two positions is provided in the driving force transmitting means.

[0005] The driving force transmitting means includes a rotating lever connected to a driving source, a shaft supported by the rotating lever, one end of which is elastically connected to the rotating lever, and the other end of which is connected to the slide body. Consists of a connected seesaw lever. Further, the pressing force applying means includes a first driving pin provided on the rotating lever, a second driving pin provided on one end of the seesaw lever, and first and second driving pins provided on the rotating lever. It consists of a torsion spring to be clamped. The first and second drive pins move in a direction away from each other, whereby a pressing force is applied.

With the above configuration, the apparatus of the present invention detects the size of the tape cassette to be mounted, and if the reel base interval is different from that of the corresponding tape cassette, uses the driving force of the driving source via the driving force transmitting means. The slide moves. Along with the movement of the slide body, a rotating member that supports the reel base and is spring-biased in one direction rotates following the cam portion of the slide body and is positioned in contact with the stopper. The biasing force of the torsion spring constituting the application means absorbs the overstroke and elastically presses the slide body, whereby the reel base is pressed and held at a predetermined position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view when a large tape cassette is mounted, FIG. 2 is a plan view when a small tape cassette is mounted, FIG. 3 is a plan view showing a positional relationship when the large and small tape cassettes are used, and FIG. FIG. 5 is a plan view when the movement of the slide body is completed. The large and small tape cassettes will be described with reference to FIG.
The large tape cassette 1 is provided with positioning holes 1a to 1d and a hole 1e for releasing a reel lock. The small tape cassette 2 is provided with positioning holes 2a to 2d and a hole 2e for releasing a reel lock. In addition, 1h, 1
i indicates the center of the reel of the large tape cassette 1 and 2
h and 2i indicate the centers of the reels of the small tape cassette 2. ΔY indicates a moving distance of a slide body described later.

In FIG. 1, reference numerals 3 and 4 rotatably support, at one end, a take-up side and a supply side reel bases 5 and 6, and are rotatable around shafts 7a and 7b on a chassis (not shown). It is a simple rotating member. The shafts 7a and 7b have reel gears 5a and 6
a, the relay gears 8, 9 meshed with a
4 is coaxially supported. The rotating members 3 and 4 are constantly biased in one direction to CW and CCW by spring coils 10 and 11, respectively. 12a, 12b, 13
Reference numerals a and 13b denote stoppers provided on the chassis.
Reference numeral 14 denotes a slide body disposed on the chassis, and the slide body 14 has guide pins 14a, 14a and 1
4b, each of which has an elongated hole 7 cut into the chassis.
c, 7c, 7c.

Reference numeral 14e denotes a reel lock releasing member protruding from the slide body 14. Reference numeral 15 denotes a drive gear that is rotationally driven by a drive source such as a motor (not shown), and reference numeral 16 denotes a rotation lever that can rotate around a shaft 7d on the chassis. A link 17 is attached between the rotation lever 16 and the drive gear 15. Reference numeral 18 denotes a seesaw lever. The seesaw lever is pivotally supported at a substantially central portion by a rotating lever 16, a pin 14b of the slide body 14 is loosely fitted into a through hole 18a provided at one end, and is fixedly implanted at the other end. The driving pin (second driving pin) 19 is viewed through the through hole 16 b of the rotating lever 16. Reference numeral 20 denotes a drive pin (first
Drive pin). Reference numeral 21 denotes a torsion spring which is attached to the rotating lever 16 and clamps the two drive pins 19 and 20. Reference numerals 22 and 23 denote direct drive reel motors having gears 22a and 23a.

First, it is assumed that the reel base moving device of the present invention is at a position where a small tape cassette can be mounted as shown in FIG. Now, when the large tape cassette 1 is mounted, the detection means (not shown) detects that the large tape cassette 1 is the large tape cassette 1, and the motor (not shown) rotates to rotate the drive gear 15 clockwise (CW). ). The rotation of the drive gear 15 to CW causes the rotation lever 16 to rotate to CW about the shaft 7 d via the link 17. By the rotation of the rotation lever 16 to CW, the drive pin 19 and the drive pin 20 are held by the torsion spring 21 as shown in FIG.
The slide body 14 is moved downward in the drawing with the seesaw lever 18 integrated with the rotating lever 16. With the movement of the slide body 14, the rotating members 3 and 4 elastically abutting on the slide body 14 are respectively slidably in contact with the inclined cam portions 14c and 14c of the slide body 14 to move the CC.
It is forcibly rotated to W and CW.

Finally, the rotating members 3, 4 abut against the stoppers 12a, 13a, respectively, and the slide body 14 stops (see FIG. 1). At this time, the rotating members 3 and 4 are positioned by being sandwiched between the stoppers 12a and 13a and the cam portion 14d of the slide body 14. Even after the slide body 14 stops, the drive gear 15 slightly rotates to CW,
The drive pin 19 presses the spring piece 21a against the urging force of the torsion spring 21 and expands between the two drive pins 19 and 20, thereby absorbing the overstroke.
Here, by stopping the rotation of the motor and stopping the drive gear 14, the slide body 14 is elastically and reliably positioned and held at a predetermined position. Here, the slide body 14
Is set to be equal to Δy shown in FIG.
e is correctly set at the position of the hole 1e for releasing the reel lock of the large tape cassette 1.

The apparatus of the present invention rotates the reel motors 22 and 23 in accordance with the operation mode, and
The reel bases 5 and 6 are driven to rotate via 23 gears 22a and 23a, relay gears 8 and 9 and reel gears 5a and 6a.
When the small tape cassette 2 is mounted from the state in which the large tape cassette 1 can be mounted, the motor rotates in the reverse direction, the drive gear 15 rotates to CCW, and the operation shown in FIG. The explanation is omitted.

[0013]

According to the structure of the present invention, it is possible to accurately move the reel base and the reel unlocking member corresponding to the large and small tape cassettes having different sizes and reel intervals to predetermined positions, and to simplify the operation. With such a configuration, it is possible to provide a device that can fix the reel base by pressing at a predetermined position.

[Brief description of the drawings]

FIG. 1 is a plan view when a large tape cassette is mounted.

FIG. 2 is a plan view when a small tape cassette is mounted.

FIG. 3 is a plan view showing a positional relationship when the large and small tape cassettes are used.

FIG. 4 is a plan view of the slide body during movement.

FIG. 5 is a plan view when the movement of the slide body is completed.

FIG. 6 is a plan view of a conventional example when a small tape cassette is mounted.

FIG. 7 is a plan view of a conventional example when a large tape cassette is mounted.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 large tape cassette 2 small tape cassette 3 rotating member 14 slide body 16 rotating lever 18 seesaw lever 19 drive pin (second) 20 drive pin (first) 21 torsion spring

Claims (2)

(57) [Claims] 1. A magnetic recording / reproducing apparatus having a reel table moving mechanism capable of mounting a plurality of types of tape cassettes having different reel intervals, comprising: a pair of magnetic recording / reproducing apparatuses which are biased in one direction and rotatably support the reel table. A rotation member, a slide body for rotating the rotation member and positioning the reel stand at two positions, a driving force transmitting means for driving the slide body by a driving force of a driving source, and And a pressing force applying means for bringing the position into pressure contact with the position, the pressing force applying means being provided on the driving force transmitting means, a first drive pin provided on the rotating lever, and one end of the seesaw lever. And a torsion spring provided on the rotating lever and sandwiching the first and second drive pins. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein a pressing force is applied by moving the first and second drive pins in a direction away from each other.