JPH04106753A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To selectively load large and small cassettes having different thickness by providing a first longitudinal pin moving means concerning the positioning of the compact cassette and a compact rocket pin holding means in a chassis so as to load the various kinds of cassettes having different thickness. CONSTITUTION:When loading a large cassette C2, the cassette C2 is positioned in a heightwise direction by a large longitudinal pin 306 and positioned horizontally by large rocket pins 307 and 308. When loading a small cassette C1, the cassette C1 is positioned vertically by first longitudinal pins 310 and 311 and a second longitudinal pin 312 through a supporting plate 313 and horizontally positioned by small rocket pins 314 and 315. When loading the large cassette C2, the first longitudinal pins 310 and 311, supporting plate 313 and small rocket pins 314 and 315 for the small cassette C1 are saved so as not to interrupt the operation of loading the large cassette C2. Therefore, the various cassettes having different thickness can be selectively loaded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a front-loading magnetic recording/reproducing device.

(Prior Art) Tape cassettes (hereinafter referred to as "cassettes") that store magnetic tapes are used for broadcasting, business, and home use due to differences in the width of the magnetic tape, the relative speed of the tape head, and the signal processing means. Many different types are used. These are, for example, VH3 (registered trademark) format, M
It has names such as II format, DI format, and D II format.

Although there are various types of magnetic tape recording and reproducing apparatuses (hereinafter abbreviated as rVTRJ) compatible with the above-mentioned cassettes, VTRs that can commonly handle different types of cassettes have also been developed. for example,
VH3 type VTRs that can selectively handle standard cassettes and small cassettes are becoming popular.

FIG. 23 is a perspective view of a standard cassette C2, showing a supply reel 211 wound with magnetic tape (not shown) inside a housing 210.
and a take-up reel 212 are housed therein. An opening 213 into which a tape loading member for pulling out the magnetic tape fits is formed on the front side, and a lift (front i) 214 is provided so as to cover the magnetic tape (not shown) on the front side. Further, 215 is a reference hole for positioning, and 216 is a reference surface for height determination.

The dimensions of the casing 210 are 104a+m long and 18811m wide.
1% Height (thickness) is 25 mm, and the width of the built-in magnetic tape is 12.65 mm.

FIG. 24 is a perspective view of the small cassette C1, with a supply reel 22 wound with magnetic tape (not shown) inside the housing 220.
1 and a take-up reel 222 are stored therein.

An opening 223 into which a tape loading member that pulls the magnetic tape fits is formed on the front side, and a lid (front 224) is provided to cover the magnetic tape (not shown) on the front side. 225 is a reference hole for positioning, 227 is a reference surface for height determination, and 226 is a protrusion for unlocking the slit 224 provided to protrude from the side surface.

The dimensions of the casing 220 are 59 mm long, 92 mm wide, and 22.5 mm high (thickness), and the width of the built-in magnetic tape is 12.55 mm.

Section 25 is a diagram showing the arrangement relationship when the standard cassette C2 and the small cassette C1 are installed. .221 or coaxial.

(Invention or problem to be solved) The above M II format, DI format and D
For I+ format cassettes, the height (thickness) is determined within each format so that it remains the same even if the cassette's vertical and horizontal dimensions change, so if the top surface of the cassette holder bottom plate is used as a reference, , centering (height positioning) of each magnetic tape can be easily done.

However, cassettes with different height (thickness) dimensions, such as VH
For S format cassettes, as mentioned above, the thickness of the standard cassette C2 is 25 mm, while that of the small cassette C1 is 22.5 mm, so the bottom of the small cassette C1 must be raised several II meters relatively. The centers of the magnetic tapes do not match.

There is a method of attaching a raising mechanism for small cassettes to the cassette holder that stores the cassette, but when storing a standard cassette, it gets in the way and must be removed, and such a raising mechanism is complicated and Since the cassette holder, which is repeatedly moved horizontally and vertically, is equipped with a raising mechanism, a heavy burden is placed on the cassette holder and the holder moving mechanism.

Therefore, there is a need for a front-loading type magnetic recording/reproducing apparatus that can selectively mount cassettes of different sizes and thicknesses.

(Means for Solving the Problems) In order to meet the above requirements, the present invention provides a chassis of a magnetic recording/reproducing device with a plurality of large vertical pins that abut against the bottom surface of a large cassette and position the large cassette in the height direction. is set up in a position that does not interfere with the bottom plate of the cassette holder in plan view, and apart from this, a small vertical first pin and A small vertical second pin is provided, and the small vertical first pin is attached to the chassis so as to be movable in the horizontal direction, and is forcibly moved under the cassette holder by the vertical first pin moving means, and the small vertical M2 pin is horizontally movable. The present invention is characterized in that it is configured to support the bottom plate of the cassette holder via a movable support plate.

The first vertical pin moving means includes a swing lever that is swingably supported by a bracket or chassis and is pushed down by the large cassette, and the lever moves horizontally to move the small vertical first pin below the cassette holder. It is composed of a slide plate and a spring that urges the slide plate in the opposite direction, and the small vertical second pin is erected on the chassis, and the support plate is used for loading a small cassette that has moved in response to the movement of the small cassette. It is characterized by being configured so that it overlaps the small vertical second pin at the pole base.

Alternatively, the first vertical pin moving means includes a swing lever that is pivotably supported by a bracket or chassis and is pushed down by the large cassette, and the lever moves horizontally to move the small vertical first pin below the cassette holder. The cassette holder comprises a slide plate that moves the cassette holder, and a spring that biases the slide plate in the opposite direction, the small vertical second pin hanging down from the bottom plate of the cassette holder, and the support plate connected to the slide plate with a pin. The present invention is characterized in that it is configured to overlap under the small vertical second pin by driving a slide plate that moves in accordance with the small cassette.

Furthermore, the support plate is horizontally rotatably supported on the chassis, the small vertical second pin is suspended from the bottom plate of the cassette holder, and the first vertical pin moving means is connected to the support plate and the end of the support plate. It consists of a slide plate that is connected with pins and moved horizontally by a support plate to move the small vertical first pin downwards in the cassette holder, and a spring that biases this slide plate in the opposite direction, and moves in response to the small cassette. The new loading pole base is characterized by a swinging lever that swings to a position where it overlaps under the small vertical second pin, which also forcibly moves the slide plate.

In addition, the chassis of the magnetic recording/reproducing device of the present invention has a plurality of large rocket pins that contact the bottom surface of the large cassette and position the large cassette in the horizontal direction. Separately, a plurality of small rocket pins for horizontal positioning of the small cassette are attached to the chassis so as to be movable up and down, and these pins are held in an elevated state by small rocket pin holding means. It was characterized by being configured so that it

The small rocket pin holding means includes a swing lever that is pivotably supported by a bracket or chassis and is pushed down by a large cassette, and is horizontally moved by this lever to drop the small rocket pin that was at a predetermined height. It consists of a slide plate that urges the slide plate and a spring that biases the slide plate in the opposite direction.

Alternatively, the small rocket pin holding means includes a swinging lever that is horizontally rotatably supported on the chassis and has one end pushed out by a loading pole base, and a pin connected to the other end of the swinging lever, so that the small rocket pin holding means can be horizontally moved to the chassis. The small rocket pin is raised by the slide plate which is horizontally moved via the swinging lever pushed out by the loading pole base which has moved quickly to accommodate the small cassette. It was characterized by being held in

(Function) When installing a large cassette, the cassette is positioned vertically using large vertical pins and horizontally using large rocket pins.

When installing a small cassette, the cassette is positioned in the height direction using the first vertical pin and the second pin via the support plate, and the small rocket pin is used to position the cassette in the horizontal direction.

The first vertical pin, support plate, and small rocket pin for a small cassette are retracted when a large cassette is installed, and do not interfere with the operation of installing the large cassette.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

In order to facilitate understanding, an overall explanation of 5 will be given first.

FIG. 2 is a plan view of the VTR cassette loading device according to the present invention with the top plate removed, and FIG. 3 is a front view of the same.

The cassette mounting device 1 can be roughly divided into a bracket 10 constituting a cassette housing body, a first cassette insertion slot 20 on the front surface of the bracket 10, a first door 21 that blocks this, and a first door 21. A second cassette insertion slot 30 formed with a cutout and a second door 31 that closes the second cassette insertion slot 30
It consists of a cassette holder 40 movably disposed within the bracket 10, and a movement mechanism 50 for the cassette holder 40 (referred to as "holder movement mechanism").

These configurations will be explained in detail below.

The bracket 10 includes left and right side plates 11, 12 and a top plate 13 (
3) and a front panel 14, and the right side panel 12 has a lid (front M) of a standard cassette C2 (hereinafter referred to as a "large cassette" in contrast to a "small cassette" described later). A lid opener member 15 for opening the lid is provided.

The first cassette insertion port 20 is for the large cassette C2, and the second cassette insertion port 30 is for the small cassette C1.For convenience of aligning the centers of the supply reels built into the cassette, as shown in FIG. , the first and second cassette insertion slots 2
0.30 is characterized by the fact that both the left and right ends are not in the same position.

As shown in FIG. 3, the first door 21 is a large door that almost blocks the first cassette insertion slot 20, and the second door 3
1 is much smaller in width (left and right dimensions) than the first door 21.

FIG. 4 is a cross-sectional view of the first and second door parts. door 31
The upper end thereof is swingably locked to the first door 21 by a short shaft 32.

In addition, at both left and right ends of the front surface of the second door 31, there are convex upper guides 33. for guiding the small cassette C1.
There are 33.

FIG. 5 is a diagram showing the area around the second cassette insertion opening.
The small cassette C1 manually inserted into the cassette insertion slot 30 is inserted into the left and right upper guides 33 of the second door 31.
．． 33 and lower guides 34 and 34 of the left and right second door rotor members 82, which will be described later, are used to fix the position in the vertical and horizontal directions.

As shown in FIG. 2, the cassette holder 40 has a mouth shape when viewed from the front from a bottom plate 41, a top plate 42, and left and right side plates 43 and 44 (described later in FIG. 10), and its width is approximately the same as that of a large cassette. A large cassette storage section is formed for storing a large cassette, and a small cassette storage section is formed inside the large cassette storage section. Note that the inner surface (upper surface) of the bottom plate 41 is a flat surface.

The upper cassette holder 40 is moved by the holder moving mechanism 50 between the cassette insertion standby position shown in the second section and the cassette predetermined mounting position. For that purpose, Holter moving mechanism 5
0 transmits the driving force of the housing motor 51 in the upper right corner of the figure to the lower part of the figure via the heald 51 and a gear train (not shown) to swing the left and right main gears Mg. Left and right main gear M
g is provided with a two-pronged fork portion, and this fork portion similarly swings as the main gear Mg swings. On the other hand, pins (not shown) protrude from the left and right sides of the cassette holder 40, and these pins engage with abbreviated guide grooves (not shown) formed on both side plates 11 and 12 of the bracket. . Since the left and right pins are narrowed so that they can be moved in the longitudinal direction of the hawk through the guide grooves, the housing motor 51 of the holder moving mechanism 50 is started, and the hawk is moved to Y in FIG. When tilted in the Y direction, the cassette holder 40
direction, and then descends (towards the back of the blade).

Next, the locking mechanism of the first and second doors will be explained. 1st
・The second door is locked except when necessary (when loading and unloading cassettes) to prevent foreign objects from entering. This tunnel will be explained next based on the drawings.

Fig. 6 is a front view of the second door '81, and Fig. 7 is a plan view of the same, in which a first door lock mechanism 60, 60 is provided on the left and right sides of the first cassette insertion slot 2o. There is. , the first door lock mechanism 6o has a first door lock member 62 that swings around a fulcrum 61 on the front panel 14 as a main component,
As shown in FIG.
A locking recess 6 formed by a front tapered portion 63 that can be retracted into the cassette insertion slot 20 and a claw portion 64 that can be engaged with the rear surface of the first door.
2a, and a rear taper portion 65 used when pushing out the claw portion 64 of the locking recess 62a to the open position.

A large cassette detection switch 66, 66 (for example, a button head type limit switch) is provided on the outer side of the first door lock member 62, 62, and both switches 66, 66 are provided.
6.66 is on and it is determined that a dog-shaped cassette has been inserted. If only one of the detection switches 66 is turned on, it is determined that the cassette has been inserted by mistake.

When the large cassette 02 is installed at a predetermined mounting position, the first door 21 is closed and locked by the first door lock member 62, but the large cassette C2 installed at this predetermined mounting position Since it is necessary to open the first door 21 when ejecting (extracting), at least the lock is released during this intermittent operation.

The first door lock release mechanism 70 includes a first door lock release member 72 that is swingably supported on a shaft 71 that is horizontally hooked to the left and right side plates 11 and 12 of the bracket 10 at the rear of the first door 21. The main body of the first door unlocking member 72 has a seesaw shape, and is positioned upwardly on the side opposite to the door (upper side in the figure) by means of a spring (not shown), and positioned downwardly on the near side. Then, the first
An operating portion 73 having a tapered surface related to the rear tapered portion 65 of the door lock member 62 is formed, and has an abutting portion 74 on the back side that abuts the lower surface of the large cassette. Therefore, when the large cassette C2 that is mounted to a predetermined mounting position for recording or playback comes down, the contact portion 74
is pushed down, the actuating part 73 goes up, and this actuating part 73
The lock by the first door lock mechanism 60 is released by pushing out the first door lock member 62 in the opening direction (arrow ■).

The second door locking mechanism and release mechanism for the second door will now be described.

The second door lock mechanism 80 is provided on the front panel 14 at both left and right end positions of the second cassette insertion slot 30, as shown in FIG. 8-8
As shown in FIG. 8, which is a line cross-sectional view, the main elements of the second door lock mechanism 80 are left and right second door lock members 82 rotatably supported on the front panel 14 by shafts 81, Although it is biased clockwise by the spring in FIG. 8, a part of it comes into contact with a part of the front panel 14 and is held in the horizontal state shown in the same figure, and is rotated counterclockwise from this horizontal state. It is possible.

As shown in FIG. 5 when viewed from the front, the second door lock member 82 is lower by a step, and a small cassette portion 83 that matches the width of the small cassette C1 is formed with a notch, and a higher point outside of the small cassette portion 83 is formed with a notch. The large cassette volume has a surface 84, and this step is connected to the lower guide 34.34 of the small cassette C1 mentioned above.
It is said that

The tip of the second door lock member 82 (left side in FIG. 8)
A lock portion 85 that can be engaged with the lower end of the left or right side of the second door 31 is provided in a protruding manner. Therefore, in the state shown in FIG. 8, the second door 31 is not rotated counterclockwise, that is, is not opened, but is in a locked state. , when the second door lock member 82 is rotated counterclockwise in the figure, the second door 31 can be opened.

The second door unlocking mechanism 90 that forcibly opens the second door locking mechanism 80 may be any mechanism that pushes down the second door locking member 82. The operated lever 91, 91 is swung (indicated by the arrow ■ in FIG. 8), and the pin 86 on the second door locking member 82 is pushed down to release the door.

Note that the shaft 71 is rotated by an operating lever 93 at the left end in FIG. The shaft 71 and the operating lever 93 are biased counterclockwise in FIG. 8 by the action of the torsion spring 94, but they are restricted by a stopper (not shown) and cannot rotate counterclockwise further than in the figure (clockwise rotation only). Possible).

As described above, in the cassette loading device of this embodiment, since both the first door 21 and the second door 31 are locked and held in the closed state, it is difficult to insert a cassette of a different type or manually. Even if you try to push it open, the first door 21
'EL and the second door 31 do not open, which prevents incorrect insertion of a different type of cassette, and also prevents children from inserting their hands and damaging the VTR device or causing injury. can.

The small cassette C1 passed through the first cassette insertion port 20
is the cassette holder 4 prepared for the large cassette C2.
However, because the cassette holder 40 is large,
It is necessary to position the small cassette C1 separately from the large cassette C2.

Therefore, in the wooden embodiment, the front positioning mechanism, the detection mechanism, the left and right positioning mechanism, the lid opener mechanism, the cassette holding mechanism, and these mechanisms of the small cassette C1 are collectively placed below the top plate 42 of the cassette holder 40. It is equipped with a holding means such as a mechanism for holding a small cassette. These will be explained based on the following drawings.

Figure 9 is a plan view showing the lower part of the top plate of the cassette holder in Figure 2 (however, Figure 2 has been rotated by 180 degrees), Figure 10 is a view taken from arrow 10 in Figure 9, and Figure 11 is 11-1 in Figure 10
12 is a sectional view taken along the line 12-12 of FIG. 10, and FIG. 13 is a sectional view taken along the line 13-13 of the 'tSe diagram.

The small cassette mechanism holding means 100 includes first support arms 102, 102 extending downward in the figure from a long drive shaft 1'01 (attached to the bottom surface of the top plate 42 of the cassette holder) shown in FIG. Shikaku arm 10210
2 is fixed to the drive shaft 101), the support shaft 103 is hung on the tips of these, and this support shaft 10
Lock arms 104, 104 are rotatably attached to the drive shaft 101 and extend downward in the figure.
A second support arm 105° 105 (in FIG. 11, it can only rotate counterclockwise due to the effect of an unillustrated stopper and cannot move further clockwise) is attached to the second support arm 105°105, and extends downward in the figure. and attach lock shaft 1 to the tips of these.
06 is given to Kakeha. As shown in FIG. 11, the present invention is characterized in that a first support arm 102, a lock arm 104, and a second support arm 105 form a triangle with a drive shaft 101 at the top. The tip of the lock arm 104, which corresponds to the bottom side, is a hook portion 104b, which engages with the lock shaft 106 from above.

The bottom surface 1 of the lock arm 104 in FIG.
04a is located above the top surface of the small cassette C1 and below the top surface of the large cassette C2.
The small cassette mechanism holding means 100 consisting of the above is unique in that it retracts the small cassette mechanisms upward all at once when the large cassette C2 is inserted. Note that, as shown in the figure, two sets of lock arms 104, 104, etc. are provided on the left and right, but the present invention is not limited to this, and one set may be provided near the center.
The size of 1 g ('t%9 in the left-right direction in the figure) may be increased.

The front positioning mechanism 110 of the small cassette C1 includes a pair of stopper arms 111, 111 that are suspended outside the second support arm 105105 of the drive shaft 101 within the area of the small cassette C1 shown by phantom lines in FIG.
Consisted of. The stopper arm 111 has its base rotatably locked to the drive shaft 101, bends toward the tip, and has a locking portion 1 there shown clearly in FIG.
12, and cannot be rotated clockwise in the figure by a stopper (not shown) (it can only be rotated counterclockwise in the figure; it is always biased clockwise by a torsion spring).

A small force cera [-The detection mechanism 120 is as shown in FIG.
Small switch means attached to the side of the stopper arm 111, 111 (e.g. micro limit switch > 121, 121) and the second support arm
It consists of operating pins 122, 122 stretched outward from the left and right, and along with stopper arms 111, 111 that are slightly pushed by the small cassette C1 in FIG.
The small switch means 121.121 rises and abuts the operating pin 122.122 waiting upwards, and the small switch means 121.121 are both turned on. With this, it is detected that the small cassette 01 has been inserted to a predetermined position.

The small cassette C1 oven mechanism 130 has a first
It is suspended from the drive shaft 101 slightly to the left of the center of FIG.

As shown in FIG. 12, the base portion 131 is pressed against a stopper (not shown) by a spring (not shown) that biases it in the clockwise direction, so that it can rotate counterclockwise from the position shown in the figure. .

Further, in FIG. 10, the opener 132 is pressed against a stopper by a counterclockwise biasing spring (not shown), so that it can rotate clockwise from the position shown in the figure.

The left and right positioning mechanism 140 for the small cassette C1 consists of a pair of side guide levers 141 and 141 extending from the drive shaft 101 so as to sandwich the small cassette C1 from left and right sides, as shown in FIGS. 9 and 10. It is pressed against a stopper (not shown) by a spring (not shown) biasing the cassette in the direction opposite to the cassette insertion direction, so that it can swing in the cassette insertion direction from the position shown in the figure. Note that the guide lever 141 on the left side of the figure also serves as a sliding release member for the small cassette C1, as will be described later.

The cassette holding mechanism 150 is a mechanism that holds down the small cassette C1 and the large cassette C2 in the cassette holder 40 from above, and as shown in FIG.
1 is a seesaw-shaped cassette holding support arm 151, 15.
1, and these cassette holding support arms 151, 1
A presser support shaft 152 is attached to one end of the presser foot 51 (upper side in FIG. 9), and a first cassette presser 153 and a second cassette presser 154 are attached to this presser support shaft 152 (in a V-shape in FIG. 13). Install the base. Note that the first cassette holder 153 is rotatably fitted to the holder support shaft 152, and the second cassette holder 154 is fixed.

Also, the other end of the cassette presser support arm 151 (¥
The operation parts 151a, 151a of the lower part of FIG.
It is in contact with a.

Note that the cassette presser support arms 151, 151 are as follows:
In FIG. 13, the drive shaft 101 is biased counterclockwise by a spring. Further, the first cassette presser foot 153 is pressed against a stopper (not shown) by a spring (not shown) that biases the presser foot support shaft 152 clockwise, and can be rotated counterclockwise from the position shown in the figure. and large and small cassettes C2 and CI at the lowest position.
It is made to come into contact with the top surface of.

It should be noted that the cassette holding mechanism 150 is used to hold down not only the small cassette C1 but also the large cassette C2, and in pressing the large cassette C2, the pressure from the first and second cassette presses 153 and 154 is sufficient. Yes, but
If it is necessary to further press both ends of the large cassette C2, a cassette holding member such as a well-known plate spring may be provided as necessary.

Returning to FIG. 9, what is shown on the left side of the figure is the drive shaft rotation mechanism 160, which includes a drive motor 181 and a gear group 16.
This is a mechanism that rotates the drive shaft 101 in the forward and reverse directions in the following order: 2-cam gear 163 -> cam groove 164 - rack 165 that moves in the vertical direction in the figure - pinion 166 ->.

The overall configuration of the cassette loading device 1 according to the embodiment has been described above, and the configuration of the present invention is shown in FIG. 1(a).

(b) It will be explained below based on. FIG. 1(a) is an internal plan view of a VTR according to the present invention, in which a rotating drum 302 is provided at the back of a chassis 301 of a VTR (Ia replay recording device 300), and The left and right loading pole bases 304, 304, which run while being fitted into guide grooves 303, 303 extending from the cassettes CI and C2, pull out the magnetic tape from the cassettes CI and C2 and wind it around the rotating drum 302.

Cassette)-CI, C2 must be positioned in the height direction and horizontal direction.

The thick (lower bottom surface) large cassette C2 has a large vertical pin 305. which positions the large cassette in the height direction.
Positioning in the height direction is performed at a total of four points: 306 (lower part of the figure) and large rocket pins/vertical pins 307 and 308 shown in the upper part of the figure.
8, horizontal positioning is performed.

That is, the large rocket pins/vertical pins 307 and 308 are the rocket parts 307a and 308a that enter the positioning reference holes 215 and 215 (FIG. 23) of the large cassette C2,
It has stepped portions 307b and 308b on which the large cassette C2 is placed.

On the other hand, the small cassette C1 has a support plate 313 mounted on the left and right small vertical first pins 310, 311 and the small vertical second pin 312 in the center of the figure. The positioning in the height direction is done, and the small rocket pins 314 and 315 on the left and right sides of the bottom of the figure are
The small cassette C1 is directly positioned in the height direction and in the horizontal direction. These small rocket pins 3
14 and 315 enter the positioning reference holes 225 and 225 (FIG. 24) of the small cassette C1.

The vertical pins 305 and 306 for the large cassette C2 have a low upper surface level, and the large rocket pin and vertical pin 307.
As is clear from the figure, 308 is located at a position unrelated to the small cassette C1, so it does not interfere with the mounting of the small cassette C1.

However, the first vertical pin 310.3 for the small cassette C1
11, support plate 313 and small rocket pin 31
Since 4,315 is located at a high position, it gets in the way when installing the large cassette C2. Therefore, this embodiment has the configuration described below.

Both the small vertical first pins 310 and 311 are mounted on a slide plate 321, and can move from side to side in the figure together with the slide plate 321. This slide plate 32
1 is a long hole and large vertical pins 305, 306, which do not go any further to the right. As shown in FIG. 26, when it is slid to the left, the first vertical pin 310 on the left comes off from the bottom plate 41 of the cassette holder 40, and the first vertical pin 311 on the right comes out of the protrusion 41b provided on the bottom surface of the bottom plate 41. It comes off.

FIG. 1(b) is a front view of FIG. 1(a), in which the rotary lever 322 is pivotally supported by a pin 322a on the bracket 10 side, and the lower part of the rotary lever 322 is attached to the slide plate 321 via a spring 323. connected. The slide plate 321, rotation lever 322, spring 323, etc. constitute a vertical first pin moving means 320A.

Therefore, when the cassette is not installed and when the small cassette C1 is installed, the state is as shown in FIG. Rotate clockwise, resulting in the 26th
As shown in the figure, the slide plate 321 is forcibly moved to the left in the figure.

The tJs type rocket pin 314 on the left is the small pin 314a.
It is locked to the chassis 301 so as to be able to swing up and down, and rests on the rotation regulating member 325 of the slide plate 321, as shown in FIGS. 1(a) and 1(b). Therefore, as shown in FIG.
21 moves to the left, the rotation regulating member 325 comes off from the left small rocket pin 314, loses its support, and the left small rocket pin 314 falls.

The right small rocket pin 315 is locked to the chassis 301 by a small pin 315a so as to be able to swing up and down, as shown in FIG.
It rests on the rotation regulating member 326 of the 0-shaped plate 324 shown in a) and (b). The other end of the 0-shaped plate 324 is a reel lock release pin 324a that connects to the chassis 301.
As shown in FIG. 26, it is also locked to the slide plate 321.
When it moves to the left, the 0-shaped plate 324 rotates clockwise around the small pin 324a, and the rotation regulating member 326 comes off the right small rocket pin 315, leaving it with nothing but support. Therefore, the right small rocket pin 315 is also attached to the slide plate 3.
If 21 moves to the left, it will fall.

That is, the slide plate 321 and the rotation lever 322
and a small rocket pin holding means 32 with a spring 323
0B is configured.

The second vertical pin 312 stands up from the chassis 301.
J(c)), the upper end level of which is slightly lower than the lower surface level of the large cassette C2. A support plate 33 is placed on this second vertical pin 312, and this support plate 313 is horizontally rotatable around the large rocket pin 307 shown in FIG. The right loading ball head 30
4 is pushed to the 1st place in the diagram. Further, a hole 41c is formed in the bottom plate 41 of the holder 40 to correspond to the second vertical pin 312.

On the other hand, since the starting point of the loading ball for the large cassette C2 is located above the position shown in FIG. 1(a) as shown in FIG. It comes off the pin 312.

The configuration described above is characterized in that the pins, rocket pins, etc. for the small cassette C1 are quickly retracted when the large cassette C2 is attached.

The operation of the cassette loading device having the above configuration will be described below. In order to make it easier to understand, the overall explanation will be given first, and the operation of the first and second doors, insertion of the small cassette C1,
The order of insertion of the large cassette C2 will be described.

14(a) to 14(f) are explanatory views of the operation of the first door 21, and FIGS. 15(a) to 15(f) are explanatory views of the operation of the second door 31.

In FIG. 14(a), when the large cassette C2 is inserted from the first cassette insertion port 20, both ends of the large cassette C2 are attached to the front tapered portions 63 of the left and right first door lock members 62.
(Fig. 7) is pushed outward against a spring (not shown), the 'fs1 door lock member 62 rotates (arrow ■ in Fig. 7) about the fulcrum 61, and the first door lock member 62 rotates (arrow ■ in Fig. 7). Since the locking recess NS62a of 62 is disengaged from the end of the first door 21, the first door 21 is unlocked.

On the other hand, as shown in FIG. 14(b), the bottom surface of the large cassette C2 pushes the surface 84 of the second door lock member 82, and the second door lock member 82 moves counterclockwise in the figure around the axis 81. 14(C), the lock part 85 of the 7i%2 door lock member 82 comes off from the second door 31, and the second door 31 is unlocked. Ru. As a result, the first door 21 and the second
Since the door 31 is rotatable, it is pushed open by the inserted large cassette, and the large cassette C2 is opened as shown in FIG.
Cassette holder 40 shown in d) (not shown in the figure)
14(e) and reaches the predetermined mounting position shown in FIG. 14(f) by the operation of the holder moving mechanism 50.

When the standard power cellar 1-C2 is mounted at the predetermined mounting position shown in FIG. 14(f), the rear end of the lower surface of the large cassette C2 is attached to the abutting portion 74 of the first door lock release member 72 shown in FIG. The first door lock release member 72 contacts and presses the first door lock release member 72.
rotates around the shaft 71, so that the lower part of the rear tapered part 65 of the first door locking member 62 is pressed outward and supported by the tapered surface of the actuating part 73 of the first door unlocking member 72. Therefore, the first door 21 is maintained in the unlocked state.

On the other hand, the left main gear M that should move the cassette holder 40
By rotation of g, Fig. 14(e) and Fig. 14(f)
As shown in the figure, the pin Mgl provided on the left main gear Mg
touches the operating lever 93 and pushes it up clockwise in the figure, so the shaft 71 also rotates clockwise,
The operating piece 91 also rotates clockwise in the figure to abut and hold the pin 86 of the second door lock member 82, so that the second door 3
1 remains unlocked.

By kneading, when the large cassette C2 is installed in the predetermined mounting position, both the door 21 of the vS1 and the second door 31 are unlocked, and when the large cassette C2 is ejected, the housing door (not shown) is opened. Due to the mechanism,
There is no problem when opening both the first door 21 and the second door 31.

In addition, the first door 21 and the second door 21 shown in FIG.
When the small cassette C1 is inserted from the second cassette insertion slot 30 with the door 31 locked, the first door lock member 62 is activated because the small cassette C1 does not engage with the left and right first door lock members 62. Without a doubt, the first
The door 21 remains open and locked.

On the other hand, as shown in FIG. 15(b), the bottom surface of the inserted small cassette C1 pushes the small cassette receiver of the left and right second door lock members 82, and the 142 door lock member 82 rotates around the axis 81. Rotate counterclockwise in the middle and turn to Fig. 15 (c
), the second door rotor member 82
The lock portion 85 is removed from the second door 31, and the second door 31 is unlocked.

As a result, the first door 21 cannot rotate and only the second door 31 can rotate, so only the second door 31 is pushed by the inserted small cassette C1 and opens. The small cassette C1 is inserted into the cassette holder 40 (not shown in the figure) as shown in FIG. 15(d).

At this time, the left and right second door lock members 82 (FIG. 5) are
Small cassette C inserted with its lower guide 34.34
While guiding the left and right lower corners of 1, the upper guide part 3
3. Guide the left and right upper corners of the small cassette C1 at 33. This restricts the movement of the small cassette C1 in the left and right direction, so that the small cassette C1 can be reliably inserted into a predetermined position in the left and right direction. Furthermore, the small cassette C1 mounted in the cassette holder 40 by the operation of the holder moving mechanism 5o passes through FIG.
The predetermined device position shown in Figure (f) is reached.

When the small cassette C1 is installed in the predetermined mounting position shown in FIG. 15(f), this small cassette C1 is attached to the first
Since it does not come into contact with the door lock release member 72 (see FIG. 7), the first door lock release mechanism 70 does not operate, and the first door 21 is held in the locked state by the first door lock member 62. . On the other hand, the operating piece 91 of the second door lock release mechanism 90 rotates clockwise in the figure in the same way as when the large cassette C2 is installed, and comes into contact with and holds the pin 86 of the second door lock member 82. , the second door 31 is maintained in the unlocked state.

As a result, only the second door 31 is unlocked when the small cassette C1 is installed in the predetermined mounting position, and only the second door 31 is opened by the opening mechanism (not shown) when the small cassette C1 is ejected. It will not cause any trouble.

Fig. 16 (a) to (f) are insertion action diagrams of the small cassette C1, Fig. 17 (a) to (d) are action diagrams of the glue rad oven for the small cassette C1, and Fig. 18 (a) to (e) are FIGS. 19(a) and 19(b) are diagrams showing the action of the cassette holding mechanism on the small cassette C1, and FIGS. 19(b) are diagrams showing the ejection action of the small cassette C1.

The small cassette C1 is passed through the second door 31 in FIG.
a) and FIG. 18(a), the cassette holder 4
When the small cassette C1 is inserted into the 0 position, the small cassette C1 is guided by the left and right side guide levers 141, 141 shown in FIG. 9, and its position in the left and right direction is performed.

As shown in FIG. 18(b), the upper part of the tip (lid side) of the small cassette C1 is attached to the first cassette presser 153.153.
When the first cassette presser 153 is inserted, the first cassette presser
．． ! 53 resists the biasing force of a spring (not shown) = t
As it rotates slightly counterclockwise as shown in Figure A (c), this presses the upper surface of the tip of the inserted small cassette C1.

Then, as shown in Fig. 16(b), the small cassette C
The front end surface of 1 is the engaging part 1 of the stopper arm 111.111
12.112 and further insertion results in xis diagram (
C) As shown in FIG.
The movement of the small cassette C1 is stopped by contacting the operation pins 122, 122 of No. 5, and the small cassette C1 is firmly held.
The forward position at the time of insertion is determined.

At this time, the convex portion 2 for lid lock release protrudes from the side surface of the small cassette C1 using the side guide lever 141 on the center side.
26 to hold the lid 224 in the unlocked state, and open the small cassette C as shown in FIG. 17(a).
The lit oven mechanism 130 of No. 1 has an opener 132.
is located slightly in front of the lit.

Also, at this time, the small switch means 121, 121 of the left and right small cassette detection mechanisms 120 provided on the stopper arms 111, 111 are pushed by the operation pins 122, 122 and are both turned on, so that the small cassette C1 is pushed into the predetermined position. Detects what is happening.

This small cassette detection mechanism 120 switch means 121,
121 detects that the small cassette c1 has been inserted into a predetermined position, the housing motor 51 is driven and the cassette holder 40 moves in the direction to draw in the cassette (in the center direction in FIG. 18).

Along with this 8-stroke, the cassette presser support arm 151°15
The first operation parts 151a, 151a are guided by the cam part 13a provided on the top plate 13 of the bracket 10, but after the second door 31 is removed from the rotation trajectory of the second cassette holder 154, this cam part 13a It also came off, which caused the 18
As shown in the figure (()), the cassette presser support arm 15
1,151 rotates counterclockwise around the drive shaft 101, and the tip of the second cassette holder 154 presses the rear upper surface of the small cassette C1, pressing the small cassette C1 from the front and back to reliably prevent movement. .

Note that the cassette presser support arm 151. The rotational movement of '151 increases the biasing force of the spring provided on the presser support shaft 152 of the first cassette presser 153, 153.
The pressing force on the cassette is increased. This reduces the force of pushing up the first cassette presser 153 when inserting the small cassette C1, thereby reducing the load during insertion.

After the small cassette C1 is held down from the front and back, the movement of the cassette holder 40 is temporarily stopped, and the drive motor 161 is driven to rotate the drive shaft 101 by a required amount counterclockwise in FIG. 16. Due to this rotation of the drive shaft 101, the stopper arms 111, 111 rotate counterclockwise in the figure as shown in FIG. 16(d).
As shown in Fig. 7(b), the opener 132 of the small cassette C1 oven mechanism 130 is connected to the small cassette C1.
It gets caught on the lid 224 of. Due to further rotation of the drive shaft 101, the stopper arms 111, 111
The opener 132 rotates through FIG. 16(e) to FIG. 16(f) so as not to interfere with the operation of the lid oven.At the same time, the opener 132 also rotates through FIG. Since the small cassette C1 is rotated counterclockwise to the position shown in (tl), the lid 224 of the small cassette C1 is opened and kept in the oven state. At this time, as shown in FIG. 18(e), the front and rear upper surfaces of the small cassette C1 are pressed by the first and second cassette holders 153, 154, so that
There is no lifting caused by the lit oven operation.

When the lift oven operation is completed, the housing motor 51 is driven again, and the cassette holder 40 is lowered and mounted at a predetermined mounting position.

When ejecting the small cassette 1-CI mounted at a predetermined mounting position, the housing motor 51 and the drive motor 15
1 rotates in the opposite direction to that described above, resulting in the opposite operation of the insertion operation, but due to the rotation of the drive motor 161 in the opposite direction, the stopper, b 111, shown in FIG. 16(a),
Even if the drive motor 151 returns to the initial state, the drive motor 151
rotates in the opposite direction by a predetermined amount, and then the stopper arm Ill, +
11 Rotate clockwise.

As a result, the lJz type upper cassette C119 (b)
11.1 until the stopper arm 111 reaches the position shown in
The small cassette CI is pushed out in the direction of the second cassette insertion opening 30, that is, ejected, thereby increasing the amount of projection of the small cassette CI from the cassette insertion opening 30, thereby facilitating the ejection operation.

The stopper arms 111, 111, which have finished discharging a predetermined amount of the small cassette c1, are operated by the drive motor 16 again.
1 returns to the initial state (FIG. 16(a)).

Figures 20 (a) to (e) are diagrams showing the insertion action of the large cassette c2, Figures 21 (a) to (C) are diagrams showing the large cassette C2 and the lit opener, and Figures 22 (a) to ( e
) is an operational view of the cassette holding mechanism for the large cassette c2.

The large cassette C2 is passed through the first door 21 in FIG.
) and the cassette holder 40 as shown in FIG. 22(a).
When the large cassette C2 is inserted into the lock arm 10, the top end (lid side) of the large cassette C2 is inserted into the lock arm 10, as shown in FIG. 20(b).
4,104 and push it up. As a result, the hook portions II) 4b, 104b of the lock arm 0+4, 104 are removed from the lock shaft 105, and the second support arm 11]5
j[15 becomes rotatable.

Due to the rough insertion, the front end surface of the large cassette C2 is brought into contact with the stopper arms 111, 11 as shown in FIG. 20(c).
When the large cassette C2 collides with the locking portions 112, 112 of 1, the stopper arm 111, 111 is pushed by the large cassette C2 and rotates counterclockwise in the figure around the drive shaft 101. The large cassette C2 is retracted together with the second support arms 105, 105 to the upper position of the large cassette C2 as shown in FIG. 20(d).
so that it does not interfere with the insertion operation. and,
It comes into contact with a raised piece 41a (FIG. 2) formed on the Y end side of the bottom plate 41 of the well-known cassette holder 40, and its insertion front position is determined.

At this time, the small cassette stack oven mechanism 130 is also pushed upward by the inserted large cassette C2, as shown in FIGS. 21(a) to 21(c), so that it does not interfere with the insertion operation.

Furthermore, as shown in FIG. 22(b), the inserted large cassette C2 is pushed up by the upper surface of the large cassette C2 coming into contact with the first cassette presser 153, 153.
The front upper surface of the large cassette C2 is pressed by the biasing force of the springs provided in the first cassette holders 153, 153 (however, the load is such that it does not become an excessive load during insertion).

Then, as shown in FIG. 22(C), when the small cassette c1 is opened during insertion, it comes into contact with the cut and raised piece 41a of the cassette holder 40, and then the insertion force is used to hold the cassette holder 4.
0 moves slightly, the housing motor 51 is driven to move the cassette holder 40 B. When the movement of the cassette holder 40 causes the first door 21 to deviate from the rotation trajectory of the second cassette holder 154 as shown in FIG. 22(d), the cassette holder support arms 151, 151
The operation parts 151a, 151a are the top plate 1 of the bracket 10.
The cassette presser support arm 151.151 rotates counterclockwise around the drive shaft 101, and the tip of the second cassette presser 154 presses the rear upper surface of the large cassette 1-C2. , large cassette 1
- Press C2 from the front and back to reliably prevent its movement.

Thereafter, the cassette holder 40 is lowered as shown in Section 22 (e), and this lowering action opens the lid 214 of the large cassette C2 shown in FIG. It is installed in the installation position.

In addition, with the insertion of the large cassette C1, the left and right large cassette detection switches 66, 66 provided on the outside of the first door lock member 62 are turned on and detect that the large cassette C2 is installed. As the small cassette detection mechanism 120 is inserted, the switch means 121 of the small cassette detection mechanism 120
, 121 are turned on, the drive motor 161 and the housing motor 51 will not malfunction.

Next, the mounting operation of the large cassette and the small cassette, which is a feature of the present invention, will be described below.

¥S1 As described in the configurations of Figures (a) and (b), the present invention is characterized by cleverly using positioning pins and the like for the large cassette C2 and the small cassette C1.

Figure YS26 is an operational diagram when the large cassette C2 is installed, and as mentioned earlier, the rotary lever 322 pushed by the bottom surface of the large cassette C2 moves the slide plate 321 to the left side of the country. Then, the first pin 3 between the left small
10 comes off from the bottom plate 41 of the cassette boulder 4o, the right small vertical first pin 311 comes off from the protrusion 41b, and the rotation regulating members 325.32 [i] come off from the left and right small rocket pins 314.315, respectively. In addition, a small vertical second
Since the support plate 313 of the pin 312 is also retracted,
The hole 41c of the bottom plate 41 of the boulder 40 is directly widened.

Therefore, the large cassette c2 that has moved horizontally together with the cassette holder 4o and has descended is attached to the large group pins 305 and 306.
Positioning in the height direction is performed by a total of four points, the large rocket pins/vertical pins 307 and 308 shown in the figure (lower part of the figure) and the figure above, and horizontal positioning is carried out by the large rocket pins 307 and 308. Ru.

In FIG. 26, when the large cassette c2 begins to rise prior to the ejection operation, the slide plate 321 is moved to the right by the force of the spring 323 ('fS1 (b)). Then, as shown in FIG. 1(a), the left and right vertical first pins 310, 311 move to the position where they hit the bottom plate 41 and the protrusion 41b of the cassette holder 40, and the left small rocket pin 314 slides. plate 3
Similarly, the right rocket pin 315 is supported by the rotation regulating member 325 of the U-shaped plate 324 in a counterclockwise direction.
26 in a raised position.

Next, when the small cassette C1 is inserted, the cassette C1
In response to the signal that the loading pole base 304 is inserted, the loading pole base 304 moves to the starting end of the guide groove 303 and rotates the support plate 313 clockwise, so that the support plate 313 overlaps the second vertical pin 312 (the (See Figure 1 (c))
.

Therefore, the small cassette C1 is mounted on the bottom plate 41 of the cassette holder 40 at a total of three points, including the support plate 313 mounted on the small vertical first pins 310 and 311 on the left and right sides of the figure and the small vertical second pin 312 in the center of the figure. The horizontal positioning is done, and the small rocket pins 314 and 315 on the left and right sides of the bottom of the figure are
Direct positioning in the height direction and horizontal direction is performed.

FIG. 27(a) is a diagram showing a second embodiment of FIG. 1(a). In the figure, the same constituent members as those in FIG. 1(a) are designated by the same numbers, and detailed explanation thereof will be omitted.

In this second embodiment, the support plate 313 in FIG.
27(b) which is a front view of FIG. 27(a)).

In FIG. 27(a), the height of the front part of the small cassette C1 is the total height of the swing lever 331 held in a predetermined position by the slide plate 321 and the second vertical pin 332. The position is made. Other small M'$1
Pins 310, 311 and small rocket pins 314, 31
5 has the same effect as in Fig. 1(a).

Figures 28(a) and (b) are similar to Figure 27(a) and (
b), the slide plate 321 moved to the left by the downward movement of the large cassette c2 is the swing lever 3.
31 in the clockwise direction, and as a result, the second M pin 332 can be lowered as shown in FIG. 28(b). If necessary, an escape hole 333 is provided in the chassis 301.

This second embodiment has /JX type vertical first and second pins 310°3
11 and 332 are both operated by the slide plate 321, and as shown in FIG. 1(a), the loading pole base 30
The feature is that it does not put a burden on 4.

FIG. 29(a) is a diagram showing the third embodiment of FIG. 1(a). In this example, the rotary lever 322 of FIG. 1(a) is abolished, and the support plate 313 is replaced with a long swinging lever. Change to 341,
In addition, the second vertical pin 332 is connected to the bottom plate 4 of the cassette holder 40.
It is characterized by hanging down from 1.

When the first cassette C1 is installed, the long swing lever 341 is pushed out by the right loading pole base 304, rotates counterclockwise around the pin 341a, and moves the slide plate 321 to the right. Forced to move.

Then, FIG. 29(b) which is a front view of FIG. 29(a)
As shown, the second vertical pin 332 and the swing lever 341
The height position of the small cassette C2 is determined by the sum of . Other pins, rocket pins, etc. are the same as in Fig. 1(a).

Figure 30 (a) and (b) are East Figure 29 (a) and (
There is a working diagram of b), loading pole base 304
When the large cassette C2 is moved to a position for the large cassette C2, the long swinging lever 341 is rotated clockwise by the action of a spring (not shown), and the slide plate 321 is moved to the left.

At this time, if the opening 34]b of the swing lever 341 is aligned with the relief hole 342 of the chassis 301 (FIG. 30(b)), and the second fir pin 332 is inserted into these,
The large cassette C2 is installed smoothly.

This third embodiment is based on the rotary lever 322 of the first and second embodiments.
etc. can be eliminated, reducing the number of parts.

Incidentally, the first small vertical pins 310, 311, the second small vertical pin 312, and the small rocket pins 314, 315 of the first embodiment may be made to stand up on a common base, and this common base may be attached to the chassis 301 so as to be movable up and down. .

(Effects of the Invention) As described above, in the present invention, the first vertical pin moving means for positioning the small cassette and the small rocket pin holding means are provided on the chassis, so the cassette holder is lightweight like the conventional product. The present invention is a compact and lightweight device that can selectively mount large and small cassettes with different thicknesses. The present invention provides a front-loading type magnetic recording/reproducing device.

[Brief explanation of drawings]

FIG. 1(a) is an internal plan view of a VTR according to the present invention.
Figure 1(b) is a front view of Figure 1(a), Figure 1(c) is a sectional view of the main part, and Figure 2 is a view of the VTR cassette loading device according to the present invention with the top plate removed. A plan view, FIG. 3 is a front view of the same, FIG. 4 is a sectional view of the first and second door sections, and FIG. 5 is a cross-sectional view of the second door section.
Figure 6 is a front view of the first and second doors, Figure 7 is a plan view of the same, 'tSS diagram is a sectional view taken along the line 8-8 in Figure 6, Figure 9 is a diagram showing the area around the cassette insertion opening, and Figure 9 is a front view of the first and second doors. A plan view showing the lower part of the top plate of the cassette holder in Fig. 2 (however, Fig. 2 has been rotated by 180°), Fig. 10 is a view taken from arrow 10 in Fig. 9, and Fig. 11 is a view from Fig. 10. 1l-11 line sectional view, $12 figure is 1 of figure 10
13 is a sectional view taken along line 13-13 in FIG. 9, FIGS. 14 (a) to (f) are explanatory views of the operation of the first door, and FIGS. 15 (a) to ( f) is an explanatory diagram of the operation of the second door, Figures 16 (a) to (f) are diagrams of the insertion of a small cassette, and Figures 17 (a) to (d) are diagrams of the operation of the small cassette slot opener. 18 (a) to (a) are operational views of the cassette holding mechanism for small cassettes, No. 19
Figures (a) and (b) are diagrams of ejecting a small cassette, Figures 20 (a) to (e) are diagrams of inserting a large cassette, and Figures 21 (a) to (C) are diagrams of a large cassette and an oven. Figures 22 (a) to (e) are operational views of the cassette holding mechanism for large cassettes, Figure 23 is a perspective view of a standard cassette, Figure 24 is a perspective view of a small cassette, and Figure '825 is a standard cassette. 26 is a diagram showing the arrangement when the large cassette C2 is installed, FIG. 27(a) is a diagram of the second embodiment, and FIG. 27(b) is a diagram showing the arrangement when the large cassette C2 is installed. Front view of Figure 27(a), 2nd
Figures 8(a) and (b) are similar to Figure 27(a) and (b).
Figure 29 (a) is a diagram of the third embodiment, Figure 29 (
b) is the front view of Figure 29 (a), Hso diagram (a), (
b) is an action diagram of FIGS. 29(a) and (b). DESCRIPTION OF SYMBOLS 10... Bracket, 2o... First cassette insertion slot, 30... Second cassette insertion slot, 4o... Cassette holder, 300... VTR (magnetic reproducing and recording device), 3
01... Chassis, 302... Rotating drum, 3o3
...Guide groove, 304...Loading ball head, 3o5306...Large vertical pin, 307.308.
・Large rocket pin and vertical pin, 310, 311...
Small vertical first pin, 312... Small vertical second pin, 313
...Support plate, 314.315...Small rocket pin, 320A...Vertical first pin moving means, 320B
... Small rocket pin holding means, 321 ... Slide plate, 322 ... Rotating lever, 323 ... Spring, 331 ... Swinging lever, 341 ... Long swinging lever C1 ... Small size Cassette, c2...large cassette (standard cassette).

Claims (7)

[Claims] (1) Large and small cassettes can be selectively inserted from the cassette insertion slot on the front of the main unit, the inserted cassette is supported by a cassette holder, this cassette holder is movably supported by a bracket, and a rotating drum is formed. When the magnetic tapes are pulled out from the large and small cassettes by the loading pole and wound onto the rotating drum, the bottom of the small cassette is held at a slightly higher position than the large cassette, and the height of each magnetic tape is In a magnetic recording/reproducing device, the chassis of the magnetic recording/reproducing device has a plurality of large vertical pins that contact the bottom surface of the large cassette to position the large cassette in the height direction. , is set up in a position that does not interfere with the bottom plate of the cassette holder when viewed from above, and in addition to this, there is also a small vertical first plate that holds the bottom plate of the cassette holder at a predetermined high position when a small cassette is inserted.
A pin and a small vertical second pin are provided, the small vertical first pin is attached to the chassis so as to be movable in the horizontal direction, and is forcibly moved under the cassette holder by the vertical first pin moving means,
In addition, the small vertical second pin is configured to support the bottom plate of the cassette holder via a horizontally movable support plate, and when a large cassette is installed, the cassette is directly supported by multiple large vertical pins. At this time, both the first and second small vertical pins are in a standby state, and when the small cassette is installed, the cassette is supported by the first small vertical pin and the second small vertical pin via the support plate. A magnetic recording/reproducing device characterized in that it is supported via a cassette holder. (2) The first vertical pin moving means includes a swing lever that is pivotably supported by a bracket or chassis and is pushed down by a large cassette, and a swing lever that is moved horizontally by the lever to move the small vertical first pin to the cassette holder. It consists of a slide plate that moves downward and a spring that biases the slide plate in the opposite direction. 2. The magnetic recording/reproducing device according to claim 1, wherein the magnetic recording/reproducing device is forcibly moved so as to overlap the small vertical second pin by a loading pole base. (3) The first vertical pin moving means includes a swing lever that is pivotably supported by a bracket or chassis and is pushed down by a large cassette, and a swing lever that is moved horizontally by the lever to move the small vertical first pin to the cassette holder. It consists of a slide plate that moves downward and a spring that biases this slide plate in the opposite direction, the small vertical second pin hangs down from the bottom plate of the cassette holder, and the support plate is connected with a pin to the slide plate. 2. The magnetic recording and reproducing apparatus according to claim 1, wherein the slide plate is forcibly moved to overlap with the second small vertical pin by driving a slide plate that has been moved in correspondence with the small cassette. (4) The support plate is horizontally rotatably supported on the chassis, the small vertical second pin is suspended from the bottom plate of the cassette holder, and the first vertical pin moving means is attached to the support plate and one end of the support plate. It consists of a slide plate that is connected with pins and moved horizontally by a support plate to move the small vertical first pin downwards in the cassette holder, and a spring that biases this slide plate in the opposite direction, and moves in response to the small cassette. 2. The magnetic recording and reproducing apparatus according to claim 1, wherein the swinging lever swings to a position overlapping the small vertical second pin in the loading pole base that has been installed, and the swinging lever also forcibly moves the slide plate. Device. (5) Large and small cassettes can be selectively inserted from the cassette insertion slot on the front of the main unit, the inserted cassette is supported by a cassette holder, this cassette holder is movably supported by a bracket, and a rotating drum is formed. When the magnetic tapes are pulled out from the large and small cassettes by the loading pole and wound onto the rotating drum, the bottom of the small cassette is held at a slightly higher position than the large cassette, and the height of each magnetic tape is In a magnetic recording and reproducing device that requires the same position, the chassis of the magnetic recording and reproducing device includes a plurality of large rocket pins that contact the bottom surface of the large cassette to horizontally position the large cassette. Separately, multiple small rocket pins are installed on the chassis in a vertically movable manner to position the small cassette in the horizontal direction. A magnetic recording/reproducing device characterized in that it is held in an elevated state by a small rocket pin holding means. (6) The small rocket pin holding means includes a swing lever that is swingably supported by a bracket or chassis and is pushed down by a large cassette, and a small rocket that is horizontally moved by this lever to a predetermined height. 6. The magnetic recording and reproducing apparatus according to claim 5, comprising a slide plate that causes the pin to fall, and a spring that biases the slide plate in the opposite direction. (7) The small rocket pin holding means includes a swinging lever that is horizontally rotatably supported on the chassis and has one end pushed out by the loading pole base, and a pin connected to the other end of the swinging lever, which is horizontally rotatable on the chassis. It consists of a movably mounted slide plate, and the small rocket pin is raised and held by the slide plate, which is moved horizontally via a swinging lever pushed out by the loading pole base, which has been moved to accommodate the small cassette. 6. The magnetic recording and reproducing apparatus according to claim 5, characterized in that: