JPH09106594A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reel stand moving device for surely positioning and holding two kinds of big and small tape cassettes having different reel intervals with a narrow space and a little parts by providing a supporting pin fitted to a slider to be turned and a saving part for this supporting pin. SOLUTION: This magnetic recording and reproducing device is provided with the reel stand moving device for mounting two kinds of tape cassettes having different sizes and different reel intervals. A slider 14 moves reel stands 5 and 6 to respective positions corresponding to two kinds of different tape cassettes (a tape casstte 1 is bigger) and positions them, and a supporting pin 30 is turned orthogonally with the moving direction of the slider 14 with its move. Then, the supporting pin 30 is saved in a saving part 32 of a chassis 7 with the move of the slider 14 caused by the loading of the bigger cassette tape 1. Besides, a driving gear 15, turn lever 16, link 17 and seesaw lever 18 or the like are provided as driving force transmitting means for driving the slider 14.

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 capable of selectively mounting two types of tape cassettes having different outer dimensions (length × width × depth) and reel intervals.
The present invention relates to a positioning and holding mechanism for two types of tape cassettes.

[0002]

2. Description of the Related Art As a reel base moving mechanism of this type, FIG.
And an apparatus configured as shown in FIG. 10 is disclosed in, for example, Japanese Patent Laid-Open No. 7-29250 (G11B 15/3).
It is disclosed in 2). 9 shows a plan view when a small tape cassette is mounted, and FIG. 10 shows a plan view when a large tape cassette is mounted.

Now, from the state of FIG. 10, the small cassette 100
Is mounted, the counterclockwise direction (CC
Drive pin 1 of the oscillating drive body 101 by rotation to W).
01a rotates the swing arm 102 in the clockwise direction (CW) about the support shaft 102a. Pin 1 of the swing arm 102 loosely fitted in the elongated hole 103a at the substantially center of the interlocking arm 103.
02b, the interlocking arm 103 has its long hole 103b.
Guided by the shaft 104a of the chassis (not shown), the interlocking arm 103 moves downward in the drawing. Interlocking arm 10
By pins 103c and 103d fixed at both ends of 3,
The reel base holding levers 107 and 108 that rotatably support the reel bases 105 and 106 are mounted on the chassis shaft 104b,
It rotates to CW and CCW centering on 104c, respectively, and contacts the stoppers 109a and 110a to be positioned.

The rotation of the oscillating drive body 101 toward the CCW causes the drive pin 101a to engage with the moving lever 112, rotate the moving lever 112 to the CW centering on the shaft 104d, and set 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 about the shaft 104e toward CW. Accordingly, the drive link 114
The holding member 115 connected to the
Swing to W. That is, it moves upward in the drawing. The fan gear 116 connected to one end of the holding member 115 has a shaft 104f.
To the CCW, and the reel lock release plate 117 meshed with the fan-shaped gear 116 is rotated about the shaft 104g.
It turns to W and becomes the state of FIG. 118 is a holding member 11
5 is an information detection switch of the tape cassette placed on the recording medium 5. Incidentally, 111 is a limiter mechanism for holding the swinging arm 102 in two positions moderately, and 104h is a stopper pin. When the large tape cassette 200 is installed,
The operation opposite to the above is performed and the state shown in FIG. 10 is obtained. In addition, 117
The small tape cassette 100 is positioned in the height direction by a and 117a.

[0005]

In the above-mentioned apparatus, the component parts for moving the reel base in two positions in a moderation manner are large, the number of parts is large, and the device is complicated. Further, the moving mechanism of the positioning pin in the height direction of the tape cassette is also constituted by several rotating parts, and the number of parts is large and complicated, which hinders downsizing of the device. Therefore, it is an object of the present invention to provide a reel base moving device that surely positions and holds a tape cassette with a small number of parts and saves space.

[0006]

In order to achieve the above object, according to the present invention, in a magnetic recording / reproducing apparatus equipped with a reel base moving mechanism capable of mounting two types of tape cassettes having different reel intervals, A pair of rotating members that rotatably support the base and are urged in the position direction by being pivotally supported by the chassis, and rotating the rotating members and sliding on the chassis to position the reel base in two positions. And a drive force transmission means for driving the slide body by the drive force of the drive source, and a first support pin for supporting one tape cassette on the slide body in the moving direction of the slide body. In addition to being provided so as to be rotatable in a direction orthogonal to each other, a first retracting portion is provided at a predetermined portion of the chassis, and the first support pin is rotated by the rotation of the support pin as the slide body moves. In the evacuation area So as to avoid. The support pin is always biased in the retracting direction. Further, the retracting portion is composed of an inclined surface formed on the chassis, a through hole formed on the chassis, or a concave portion.

[0007] Further, the slide body slides with the movement,
A second support pin that pivots and is positioned at two positions and supports one tape cassette is provided, and the second support pin is interlocked with the movement of the slide body to move the second support pin to the outside of the other tape cassette mounting area ( It is configured to be saved in the second saving unit).

With the above-described structure, the device of the present invention detects the size of the tape cassette to be mounted, and when the reel stand spacing is different from the corresponding tape cassette, the driving force of the driving source causes the driving force to be transmitted through the driving force transmitting means. The slide body moves. Along with the movement of the slide body, a rotating member that supports the reel base and is urged by a spring in one direction rotates while following the cam portion of the slide body to be positioned in contact with the stopper. By interlocking with the movement of the slide body, the support pins are retracted or set up at predetermined positions, so that the corresponding tape cassettes can be attached to the two types of tape cassettes.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A specific embodiment of the present invention will be described in detail below 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 a large tape cassette is used, and FIG. 4 is a connection at two positions. FIG. 5 is a partial plan view of the means, FIG. 5 is a partial cross-sectional view when the small cassette is mounted, FIG. 6 is a partial cross-sectional view showing the relationship of the positioning pin with respect to the large and small tape cassette reference holes, and FIG. FIG. 8 is a side view, and FIG. 8 is a partial side view of another embodiment of the support pin.

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 reel lock releasing hole 1e. The small tape cassette 2 has a positioning hole 2a
2d (as shown, 2a and 2b are the same positions as the positioning holes 1a, 1b of the large tape cassette 1) and a reel lock releasing hole 2e. Therefore, in the case of the small tape cassette 2, the large tape cassette 1 shown in FIG.
In this case, the large cassette 1 is set higher than the bottom surface of the small cassette 2 as shown in FIG. 2B. Therefore, if the cassette positioning pin PC has a stepped shape, The small tape cassette 2 also serves as a support pin in the vertical direction. 1h, 1i
Indicates the center of the reel of the large tape cassette 1, 2h, 2
i indicates the center of the reel of the small tape cassette 2.
ΔY indicates a moving distance of the slide body described later. Furthermore, on the back of the tape cassettes 1 and 2, the type of tape cassette,
Detection terminals 1j and 2j for detecting information such as contents are provided, and the large tape cassette 1 and the small tape cassette 2 have different thicknesses and bottom heights, and the difference is Δh.

In FIGS. 1 and 2, 3 and 4 rotatably support the take-up side and supply side reel bases 5 and 6 at one end, and are rotatable around shafts 7a and 7b on the chassis 7. It is a rotating member. Reel gears 5a and 6a are provided on the shafts 7a and 7b.
The relay gears 8, 9 meshing with the rotatably rotate members 3, 4
Is coaxially supported. The rotating members 3 and 4 are constantly urged in one direction to CW and CCW by spring coils 10 and 11, respectively. 12a, 12b, 13a,
Reference numeral 13b is a stopper provided on the chassis 7. 1
Reference numeral 4 denotes a slide body arranged on the chassis 7. The slide body 14 has guide pins 14a, 14a and
4b are provided and are inserted into the long holes 7c, 7c, 7c cut into the chassis 7, respectively. Reference numeral 14e is a reel lock releasing member provided on the slide body 14 so as to project therefrom. still,
A pin support member 31 having a first support pin 30 that supports the bottom surface of the small tape cassette 2 is attached to the slide body 14 rotatably in a direction orthogonal to the sliding direction of the slide body 14. Reference numeral 32 denotes an inclined surface (first retracting portion) provided in the through hole 33 of the chassis 7. Instead of the inclined surface 32, only the through hole 33 or a recess (not shown) may be formed.

Reference numeral 15 is a drive gear that is rotationally driven by a drive source such as a motor (not shown), and 16 is a shaft 7 on the chassis 7.
This is a rotation lever that can rotate around d. A link 17 is attached between the rotary lever 16 and the drive gear 15.
Reference numeral 18 denotes a seesaw lever. The seesaw lever 18 is pivotally supported 16a at a substantially central portion by the rotating lever 16, a pin 14b of the slide body 14 is loosely fitted in a through hole 18a provided at one end, and the other end is fixedly planted. The drive pin 19 that has been rotated
Through the through hole 16b. Reference numeral 20 is a drive pin fixedly mounted on the rotary lever 16. Reference numeral 21 denotes a torsion spring that is attached to the rotating lever 16 and holds the two drive pins 19 and 20. Reference numerals 22 and 23 are direct drive reel motors having gears 22a and 23a.

Reference numeral 24 is a relay lever having a first cam groove 24a and a through hole 24b, which rotates about a shaft 7f on the chassis 7, and a downward pin 14f of the slide body 14 is inserted into the first cam groove 24a. Has been penetrated. Reference numeral 25 is a holding member on which a detection switch 26 is mounted as a detection means for detecting information such as the type and contents of the tape cassette. The holding member 25 has a second pin 25a loosely fitted into the through hole 24b of the relay lever 24 and a second pin 25a which is engaged with the second circular arc-shaped cam groove 7g of the chassis 7 to follow the movement (first pin). Pin)
25b and a tape cassette positioning pin 25c are provided (see FIG. 5).

A holding lever 35 having a second support pin 34 for supporting the bottom surface of the small tape cassette 2 coaxially with the follower pin 25b is rotatably supported by a torsion spring 37 so as to be C.
As shown in FIG. 2, it is biased to W and abuts against the small tape cassette 2 against the stopper 36 and is held at a position corresponding to the positioning hole 2c of the small tape cassette 2.

Next, the operation of the invention will be described. First, it is assumed that the reel base moving device is in a position where the small tape cassette can be loaded, as shown in FIG. Now, when the large tape cassette 1 is loaded, the detection means (not shown) detects that the large tape cassette 1 is present, 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 about the shaft 7d to CW via the link 17. The drive pin 19 and the drive pin 20 are clamped by the torsion spring 21 by the rotation of the rotary lever 16 to the CW, and the seesaw lever 18 is integrated with the rotary lever 16 so that the slide body 14 is moved downward in the drawing. Move to. As the slide body 14 moves, the rotating members 3 and 4 elastically abutting on the slide body 14 are forced to CCW and CW while slidingly contacting the inclined cam portions 14c and 14c of the slide body 14, respectively. Is rotated to.

Finally, the rotating members 3 and 4 come into contact with 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 is stopped, 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 to absorb 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
By setting the moving distance of the reel equal to Δy shown in FIG.
e is correctly set at the position of the reel lock release hole 1e of the large tape cassette 1. When the slide body 14 moves in the direction of arrow A from the state of FIG. 7A to reach the state of FIG. 7B, the pin holding member 31 retracts to the inclined surface 32 of the chassis 7. Therefore, the first support pin 30 does not contact the bottom surface of the large tape cassette 1. As shown in FIG. 8, if the pin holding member 31 is urged toward the CCW by the torsion spring 38, the pin holding member 31 moves as the slide body 14 moves.
Is forcibly retracted to the inclined surface 32.

As the slide body 14 moves downward in the drawing, the pin 14f rotates the relay lever 24 along the first cam groove 24a of the relay lever 24 toward the CW centering around the support shaft 7f. Let Therefore, the follower pin 2 of the holding member 25
5b moves downward along the cam groove 7g of the chassis 7. That is, the detecting means 26 moves from the position shown in FIG. 4B to the position shown in FIG. 4A and enters the state shown in FIG. 1, and the large tape cassette 1 can be mounted. Along with the movement of the holding member 25, the holding lever 35 is rotated to CW by the urging force of the torsion spring 37 to change from the state of FIG. 4B to the state of FIG. 4A and support the bottom surface of the small tape cassette 2. The second support pin 34 retracts outside the placement area of the large tape cassette 1 on the chassis 7 (second retracting portion) (see FIG. 1). At this time, the second support pin 34 is attached to the protrusion 25 of the holding member 25.
It is locked to e. The holding lever 35 is used as the holding member 2.
It also has the function of supporting 5.

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 at a common position, and the positioning of one (opening side) of both tape cassettes 1 and 2 is performed by the pair of positioning holes 1a and 1b.
Alternatively, the positioning pins (not shown) fixed on the chassis 7 corresponding to 2a and 2b are positioned, but the positioning pin 25c corresponding to the other positioning holes 1c and 2c is movable, and in the present invention. For the positioning hole 1c of the large tape cassette 1, as shown in FIG. 4 (b), the groove width W1 at the end of the cam groove 7g is set to be slightly wider than the diameter D1 of the follower pin 25b. There is. Thereby,
The holding member 25 and the detection means 26 are allowed to move to the front, rear, left and right to some extent, so that a slight variation in the tape cassette can be absorbed, and the cylindrical portion of the positioning pin 25c penetrates into the positioning hole 1c of the large tape cassette 1. Then, the large tape cassette 1 is accurately positioned at a predetermined position.

When a small tape cassette is installed, it is shown in FIG.
By rotating the drive gear 15 to CCW from the state of (2), the operation exactly opposite to the above is followed, and the state of FIG. 2 is reached. Here, how the small tape cassette 2 is mounted on the reel stands 5 and 6 and the detecting means 26 which are positioned will be described. In the case of the small tape cassette 2 as well, as in the case of the large tape cassette 1, the protruding positioning pin 25c of the detection means 26 causes the positioning hole 2 of the small tape cassette 2 to move.
When fitted to c, as shown in FIG. 5, the height difference between the bottoms of the small tape cassette 2 and the large tape cassette 1 is used to reduce the height of the cylindrical portion of the positioning pin 25c to Δh or less. After the setting, as shown in the figure, the conical portion of the positioning pin 25c is loosely fitted into the positioning hole 2c of the small tape cassette 2. That is, the positioning of the detection 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 that is pressed and 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 vertical, the lateral position of the holding member 25 is determined. Further, the end surface 14g of the slide body 14 contacts the pin 25a, and
The spring terminal 26a (see FIG. 5) of the detection switch 26 is pressed against the detection terminal 2j on the back surface of the small tape cassette 2 to be mounted, and the reaction force acts to press the pin 25a against the end surface 14g. 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 detection means 26 are provided.
Are uniquely positioned. Although the support of the bottom surface of the large tape cassette 1 is not specifically shown, it is easily conceivable to provide the large tape cassette support pins at several places outside the mounting area of the small tape cassette 2.

The apparatus of the present invention rotates the reel motors 22 and 23 according to the operation mode,
The reel bases 5 and 6 are rotationally driven via the gears 23a and 23a of 23, the relay gears 8 and 9, and the reel gears 5a and 6a.
When the small tape cassette 2 is mounted from the mountable state of the large tape cassette 1, the motor rotates in the opposite direction, the drive gear 15 rotates to the CCW, and the operation shown in FIG. Therefore, I will omit the explanation.

[0022]

According to the present invention, the reel base and the support pins of the tape cassette are moved to correspond to large and small tape cassettes having different sizes and reel intervals by a simple structure, and the positioning of the tape cassette is surely performed. Can be provided.

[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.

3A and 3B are a plan view and a front view showing a positional relationship when a large and small tape cassette is used.

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

FIG. 5 is a partial cross-sectional view when a small cassette is attached.

FIG. 6 is a partial cross-sectional view showing the relationship between large and small tape cassette reference holes and positioning pins.

FIG. 7 is a partial side view of a small tape cassette support pin in a different state.

FIG. 8 is a partial side view of another embodiment of the support pin.

FIG. 9 is a plan view of a conventional small tape cassette mounted.

FIG. 10 is a plan view of a conventional large tape cassette mounted.

[Explanation of symbols]

 1 Large Tape Cassette 2 Small Tape Cassette 3 Rotating Member 4 Rotating Member 14 Slide Body 15 Drive Gear 30 First Support Pin 32 First Retracting Section (Slope) 34 Second Support Pin

Claims (7)

[Claims] 1. A magnetic recording / reproducing apparatus having a reel base moving mechanism capable of mounting two types of tape cassettes having different reel intervals, wherein the reel base is rotatably supported and pivotally supported by a chassis. A pair of rotating members that are biased in one direction; a slide member that rotates the rotating members and slides on the chassis to position the reel base at two positions; And a driving force transmitting means for driving the slide body by means of which the first tape cassette is supported by the slide body.
The support pin is rotatably provided in a direction orthogonal to the moving direction of the slide body, and a first retreat portion is provided at a predetermined portion of the chassis, and the first support is provided in association with the movement of the slide body. A magnetic recording / reproducing apparatus, wherein the first support pin is retracted to the first retracting portion by rotating the pin. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the first support pin is biased in a retracting direction. 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the first retracting portion is an inclined surface formed on the chassis. 4. The magnetic recording / reproducing apparatus according to claim 1, wherein the first retracting portion is a through hole formed in the chassis. 5. The magnetic recording / reproducing apparatus according to claim 1, wherein the first retracting portion is a recess formed in the chassis. 6. A magnetic recording / reproducing apparatus having a reel base moving mechanism capable of mounting two types of tape cassettes having different reel intervals, wherein the reel base is rotatably supported and pivotally supported by a chassis. A pair of rotating members that are biased in one direction, a slide member that rotates the rotating member and slides on the chassis to position the reel base at two positions, and a movement of the slide members. A second supporting pin that slides and rotates in accordance with the movement to be positioned at two positions and that supports the one tape cassette; and a driving force transmission unit that drives the slide body by the driving force of the driving source. The magnetic recording / reproducing apparatus, wherein the second support pin is retracted to the second retracting portion in association with the movement of the slide body. 7. The magnetic recording / reproducing apparatus according to claim 6, wherein the second retracting portion is outside the other tape cassette mounting area on the chassis.