JP3133655B2 - 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 mechanism for moving detection means for detecting information such as the types and contents of two types of tape cassettes in accordance with the two types of tape cassettes.

[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 in the state shown in FIG. 7, the swing driving body 101 is moved counterclockwise (CCW).
Then, the drive pin 101a of the swing driving body rotates the swing arm 102 clockwise (CW) about the support shaft 102a. Via a pin 103a of an interlocking arm 103 loosely fitted into a substantially central elongated hole 102b of the swing arm 102,
The interlocking arm 103 is guided by a shaft 104a of a chassis (not shown) in a long hole 103b of the interlocking arm 103, and the interlocking arm 103 moves downward in the drawing. The pins 103c, 103d fixed at both ends of the interlocking arm 103 cause the reel bases 105, 10 to move.
Reel holding levers 107, 1 rotatably supporting the reel 6
08 rotate to the CW and CCW around the shafts 104b and 104c of the chassis, respectively, and the stoppers 109a and 1
It is positioned in contact with 10a.

When the swing driving body 101 rotates in the CCW direction, the driving pin 101a engages with the moving lever 112, rotates the moving lever 112 to the CW centering on the shaft 104d, and sets the click point by the torsion spring 113. Beyond,
The moving lever 112 is held at the position shown in FIG. The drive link 114 connected to the moving lever 112 rotates to CW about the shaft 104e. Accordingly, the drive link 114
The holding member 115 connected to the
Swing to W. That is, it moves upward in the drawing. The sector gear 116 connected to one end of the holding member 115 has a shaft 104f.
And the reel lock release plate 117 meshed with the sector gear 116 is rotated to CCW around the shaft 104g.
It turns to W and it will be in the state of FIG. 118 is the holding member 11
5 is an information detection switch of the tape cassette placed on the reference numeral 5. Reference numeral 111 denotes a limiter mechanism for holding the swing arm 102 at two positions, and reference numeral 104h denotes a stopper pin. When the large tape cassette 200 is installed,
The operation reverse to that described above is performed and the state shown in FIG. 7 is obtained.

[0005]

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, since the information detection switch for detecting the information such as the type and contents of the tape cassette is moved to two positions corresponding to the two types of tape cassettes, the number of components is large and complicated.
This hinders downsizing of the device. 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.

[0006]

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 urged in the direction to rotatably support the reel base, a slide body for rotating the rotating member and positioning the reel base at two positions, and a slide body driven by a driving source. It comprises driving force transmitting means for driving, detecting means for detecting information such as the type and contents of the tape cassette, and connecting means for connecting the detecting means and the slide body. The detecting means is moved to a position corresponding to the two kinds of tape cassettes via the connecting means.

[0007] The connecting means is pivotally supported on the chassis, and has a rotating lever having a pin of a slide body engaged with the first cam groove, and a first pin which moves following the second cam groove of the chassis. A second pin that is loosely fitted into the through hole of the rotating lever,
And a supporting member on which the detecting means is mounted. The groove width at the end of the second cam groove is formed to be smaller than the first pin diameter.

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, the driving force of the driving source causes the driving force to be transmitted via the driving force transmitting means. The slide moves. Along with the movement of the slide body, the rotating member that supports the reel base and is spring-biased in one direction rotates while following the cam portion of the slide body and is positioned in contact with the stopper. In conjunction with the movement of the slide body, the support member on which the tape cassette detecting means is mounted moves via the rotating lever, and the tape cassette information can be detected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings. 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 and a front view showing a positional relationship when the large and small tape cassettes are used, and FIG. FIG. 5 is a partial plan view of the connecting means, and FIG. First, 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 has a positioning hole 2a.
2d (as shown, 2a and 2b are at the same positions as the positioning holes 1a and 1b of the large tape cassette 1) and a hole 2e for releasing the reel lock. In addition, 1h, 1i
Indicates the center of the reel of the large tape cassette 1 and 2h,
2i indicates the center of the reel of the small tape cassette 2. ΔY indicates a moving distance of a slide body described later. Further, detection terminals 1j and
2j, the large tape cassette 1 and the small tape cassette 2 have different thicknesses and different bottom heights, and the difference is represented by Δh.

In FIG. 1, reference numerals 3 and 4 denote rotatable members rotatably supporting, on one end, take-up and supply-side reel bases 5 and 6 about shafts 7a and 7b on a chassis 7, respectively. It is. Relay gears 8, 9 meshed with the reel gears 5a, 6a are rotatably supported on the shafts 7a, 7b coaxially with the rotating members 3, 4. 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, 13a and 13b are stoppers provided on the chassis 7. Reference numeral 14 denotes a slide body disposed on the chassis 7, and the slide body 14
Are provided with guide pins 14a, 14a and 14b facing downward, and elongated holes 7c and 7 cut out from the chassis 7, respectively.
c, 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 7.
A link 17 is attached between the rotation lever 16 and the drive gear 15. Reference numeral 18 denotes a seesaw lever, and the seesaw lever 18 is pivotally supported by a rotating lever 16 at a substantially central portion thereof.
The pin 1 of the slide body 14 is inserted into the through hole 18a provided at one end.
4b is loosely fitted, and the drive pin 19 fixedly implanted at the other end is looking through the through hole 16b of the rotating lever 16. Reference numeral 20 denotes a driving pin fixed to the rotating lever 16. Reference numeral 21 denotes a torsion spring which is attached to the rotating lever 16 and clamps the two drive pins 19 and 20. 22 and 23 are gears 22
a and 23a are direct drive reel motors.

Numeral 24 denotes a relay lever having a first cam groove 24a and a through hole 24b and rotating about a shaft 7f on the chassis 7, and a downward pin 14f of the slide body 14 is provided in the first cam groove 24a. Is penetrated. Reference numeral 25 denotes a holding member on which a detection switch 26 as detection means for detecting information such as the type and contents of the tape cassette is mounted. The holding member 25 engages with the second pin 25a loosely fitted in the through hole 24b of the relay lever 24 and the arc-shaped second cam groove 7g of the chassis 7 to follow the first pin 25a. Pin) 2
5b, a tape cassette positioning pin 25c, and a support pin 25d are provided (see FIG. 5).

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 the large tape cassette 1 and the motor (not shown) rotates to rotate the drive gear 15 to 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 rotating the rotation lever 16 to CW, the drive pin 19 and the drive pin 20 are sandwiched by the torsion spring 21, and the slide body 14 is moved downward with the seesaw lever 18 integrated with the rotation lever 16. Move to With the movement of the slide body 14,
A rotating member 3 elastically in contact with the slide body 14;
4 is forcibly rotated to CCW and CW, respectively, while sliding the inclined cam portions 14c, 14c of the slide body 14.

Finally, the rotating members 3 and 4 abut against the stoppers 12a and 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 15, 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.

As the slide body 14 moves downward in the drawing, the pin 14f rotates the relay lever 24 to CW around the support shaft 7f along the first cam groove 24a of the relay lever 24. Let it. Therefore, the following pin 2 of the holding member 25
5b moves downward along the cam groove 7g of the chassis 7. That is, the detecting means moves from the position (b) of FIG. 4 to the position (a) of FIG.
Is allowed.

The positioning holes 1a, 1 of the large tape cassette 1
b and the positioning holes 2a and 2b of the small tape cassette 2 are located at a common position, and the positioning of one of the tape cassettes 1 and 2 (opening side) is determined by the pair of positioning holes 1a and 1b.
Alternatively, the positioning is performed by a fixed positioning pin (not shown) on the chassis 7 corresponding to 2a, 2b, but the positioning pin 25c corresponding to the other positioning holes 1c, 2c is movable, and in the present invention. As shown in FIG. 4B, the groove width W1 at the end of the cam groove 7g is set slightly larger than the diameter D1 of the following pin 25b for the positioning hole 1c of the large tape cassette 1. I have. Thereby,
There is a margin for the holding member 25 and the detecting means 26 to move slightly in the front-rear and left-right directions, so that a slight variation of the tape cassette can be absorbed. Then, the large tape cassette 1 is accurately positioned at a predetermined position.

When a small tape cassette is mounted, the tape cassette shown in FIG.
By rotating the drive gear 15 to CCW from the state shown in FIG. 2, the operation exactly opposite to the above is followed, and the state shown in FIG. 2 is reached. Here, how the small tape cassette 2 is mounted on the positioned reel bases 5, 6 and the detecting means 26 will be described. In the case of the small tape cassette 2, similarly to the case of the large tape cassette 1, the protruding positioning pins 25 c of the detecting means 26 are connected to the positioning holes 2 of the small tape cassette 2.
c, the height of the cylindrical portion of the positioning pin 25c is set to be equal to or less than Δh by using the difference Δh in height between the bottom surfaces of the small tape cassette 2 and the large tape cassette 1, as shown in FIG. As shown in the figure, the conical portion of the positioning pin 25c is loosely fitted in the positioning hole 2c of the small tape cassette 2. That is, the positioning of the detecting means 26 when the small tape cassette 2 is mounted is not performed by positioning the positioning pin 25c into the positioning hole 2c of the small tape cassette 2, but by the moving mechanism itself. I do.

The relay lever 24 is uniquely determined by the stop position of the slide body 14 at which the press-stop is stopped. As shown in FIG. 4B, the through hole 24b in which the pin 25a of the holding member 25 is loosely fitted has a long diameter. Since the direction is substantially in the vertical direction, the horizontal position of the holding member 25 is determined. Further, while the end surface 14g of the slide body 14 contacts the pin 25a,
A spring terminal 26a (see FIG. 5) of the detection switch 26 is pressed against the detection terminal 2j on the back of the small tape cassette 2 to be mounted, and acts to press the pin 25a against the end face 14g by the reaction force. Therefore, the pin 2 of the holding member 25
5a is also positioned in the vertical direction. On the other hand, since the pin 25b is in contact with the end of the cam groove 7g of the chassis and its vertical position is regulated, the holding member 25 and the detecting means 2
6 is uniquely positioned.

The apparatus according to the present invention rotates the reel motors 22 and 23 in accordance with the operation mode.
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.

[0020]

According to the present invention, there is provided a reel unit corresponding to large and small tape cassettes having different sizes and reel intervals with a simple structure, and a detecting means for detecting information such as the type and contents of the tape cassette. It is possible to provide a device that moves the tape cassette to a position corresponding to the tape cassette to be mounted and appropriately positions the tape cassette.

[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.

FIGS. 3A and 3B are a plan view and a front view showing a positional relationship when the large and small tape cassettes are used.

FIG. 4 is a partial plan view of the connecting means at two positions.

FIG. 5 is a partial sectional view when a small cassette is mounted.

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 7g second cam groove 14 slide body 24 relay lever 24a first cam groove 25 holding member 25a second pin 25b first pin 26 detecting means

Claims (1)

(57) [Claims] 1. A magnetic recording / reproducing apparatus having a reel stand moving mechanism capable of mounting two types of tape cassettes having different reel intervals, comprising: a pair of reels that are biased in one direction and rotatably support the reel stand. A rotation member, a slide body for rotating the rotation member and positioning the reel base at two positions, a driving force transmitting unit for driving the slide body by a driving force of a driving source, and a type of the tape cassette. Detecting means for detecting information such as information, contents, etc .; a relay lever which is pivotally supported on a chassis and a pin of the slide body is engaged with a first cam groove; and moves following a second cam groove of the chassis. And a detecting means holding member having a second pin that is loosely fitted into the through hole of the relay lever. The groove width at the end of the second cam groove is equal to the first pin. Smaller than diameter A magnetic recording / reproducing apparatus which is formed wide and moves the detecting means to a position corresponding to the two kinds of tape cassettes via the relay lever and the detection holding member as the slide body moves. .