JPH0451906B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information recording or reproducing device that records and/or reproduces video, audio, data signals, etc., and more specifically, although not limited thereto, and a video tape recorder (hereinafter abbreviated as VTR) for recording or reproducing audio signals. The present invention is characterized by a means for attaching a tape holder to an information recording or reproducing device.

Conventional home VTRs are generally stationary types that have a tuner and AC power supply and whose main function is to record and record programs broadcast by television broadcasting stations.
There are two types: VTRs and portable VTRs for camera photography. However, even with a portable VTR,
Like a stationary VTR, it uses a large cassette, and has the disadvantage of not being sufficiently portable in terms of volume and weight.

Therefore, various portable VTRs have been proposed that use small cassettes with small capacity tapes at the expense of recording time. However, these methods have the following problems. In other words, in addition to a stationary VTR primarily used for recording and broadcasting broadcasts that requires long-term recording functions, a portable VTR exclusively used for filming is required.
If the recording tape formats of a stationary VTR using a large cassette and a portable VTR using a small cassette are not compatible, the tape recorded on the portable VTR cannot be played directly on the stationary VTR, and It must be converted into an electrical signal. However, it is well known that after going through this conversion process, the SN ratio becomes worse than the original recording.

Therefore, an object of the present invention is to enable an information recording or reproducing apparatus to use a plurality of tape holders that may have different sizes by replacing them, and to attach tapes of different shapes or sizes to the main body of the information recording or reproducing apparatus. When the holder is attached, the outer shape of the entire device can be formed into a simple shape, such as a regular hexahedron, regardless of which tape holder is attached, making it convenient to handle.
It is an object of the present invention to provide an information recording or reproducing device in which most of the mechanisms of the main body of the device can be shared, whether it is portable or stationary.

To summarize, the information recording or reproducing apparatus of the present invention has a tape-shaped recording medium stretched and held on the front surface thereof, an opening into which the tape pull-out member enters, and a tape-like recording medium having a size that is different from that of the other. A plurality of different tape holders can be used, and a mounting mechanism is provided for mounting each of the plurality of tape holders at a predetermined position of the device, and the mounting mechanism places the front surfaces of the plurality of tape holders at a common position. In order to position
It is characterized by comprising a fixing member that fixes the lower surfaces of the plurality of tape holders at predetermined positions, and a movable part that moves according to the difference in position of the rear surfaces of the plurality of tape holders.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An information recording or reproducing apparatus according to the present invention and means for attaching a tape holder to the apparatus will be described below with reference to the drawings. The following explanations include the positioning movable part, the information recording or reproducing device main body, the reel shaft drive mechanism, the front panel section, the first and second holder units, the installation of the power supply device, the structure of the cassette, and modifications of the reel shaft drive mechanism. Do it in this order.

About the movable part for positioning Figures 1A and B relate to the first embodiment of the present invention, and show the case where two sets of holder units are replaced and installed in an information recording or reproducing apparatus (hereinafter abbreviated as the main body). show. Figure A shows the state in which the first holder unit (hereinafter the holder unit is simply referred to as the unit) that holds a small-capacity recording tape is installed. The first unit (tape holder) includes a cassette holder. 1st unit 3
By pressing the button 6 on both sides,
It can be removed from. 5 is a strap hanger, 28A is a cassette holder lid, and 48 is a cassette eject button.

FIG. 1B shows a state in which the first unit 3 is removed and a second unit 4 (tape holder) including a holder for a cassette containing a large capacity recording tape is attached. In order to attach the first and second units to a single main body in this way, it is necessary to attach and detach the units and move the movable parts. In this embodiment, the front operation panel part 2 is a movable part, and as shown in FIGS. 4A and 4B, it moves in the front and back direction with respect to the main body 1 by means of a rail 7. The first unit 3 has a thin regular hexahedral shape as shown in FIG. 1A, and when it is attached, the front operation panel section 2 is moved toward the main body 1. The second unit 4 has an L-shaped cross section as shown in FIG. 1B, and the height of the part in contact with the panel portion 2 is
The height is the same as that of the main body 1 and the panel section 2. Second
When installing the unit 4, pull the panel portion 2 toward you and install the unit into the stepped space created between it and the main body 1. The first unit 3 is mainly attached to a small and lightweight portable device, especially when used as a photographing device, and both the unit itself and the cassette attached thereto are small. On the other hand, the second unit 4 is mainly used when used as a stationary VTR for long-time recording and recording, and the unit itself is large, and the second unit 4 is the same as the lid 28B in FIG. 1B. As is clear from the comparison with the lid 28A of A, the cassette is also large. As mentioned above, in this example, the first and second units can be replaced and installed by moving the panel section 2 back and forth, and their positions can be determined. In either case, the shape of the entire device including the units can be corrected. It can be a hexahedron.

FIGS. 2A and 2B relate to a second embodiment of the invention, in which a movable part 2C rotates so that the first unit 3C and the second unit 4C can be replaced and installed. There is. Figure 2A
shows the state in which the first unit 3C is attached. 1st
Unit 3C is approximately the same as the first unit 3 in FIG. 1A.
The movable part 2C stands up when the first unit 3C is attached. In FIG. 2B, the movable part 2C falls forward due to rotational movement, and the second unit 4C is installed in the empty space created there.
Its position can be determined. The second unit 4C has an L-shaped cross section with a thick bottom, and the entire device can have a regular hexahedral shape when either the first or second unit is attached.

Regarding the main body of the information recording or reproducing apparatus Up to now, we have explained the attachment of the holder unit or cassette holder to the main body 1 and the accompanying movement of the movable parts.Next, we will explain the various devices necessary for recording or reproducing. The following description will primarily be directed to the first embodiment of the apparatus shown in FIGS. 1A and 1B.

The main body 1 in the first embodiment, that is, the information recording or reproducing device, includes at least a signal conversion device such as a video magnetic head that records signals on a recording medium or picks up recorded signals, and a signal conversion device such as a video magnetic head that records signals on a recording medium or picks up recorded signals. It is necessary to provide a recording tape scanning device such as a rotary head drum and a recording tape traveling mechanism for scanning the recording tape by means of the following methods. Signal processing circuits for luminance signals, color signals, audio signals, etc. can be provided in this information recording or reproducing apparatus, but they may also be provided in the first or second unit. A power supply device such as a battery can be provided in either of the two. Of course, a servo mechanism and a system control system may be provided in the information recording or reproducing device as necessary, and a tuner, RF converter, etc. may also be built into the device. However, since this information recording or reproducing device does not have a built-in cassette or cassette holder for storing the recording tape, it does not perform recording or reproducing by itself, but it can be replaced with a cassette or holder unit for storing the recording tape. By doing so, as will be clear from the explanation of the specific example below, with a simple configuration,
This has the effect of being able to fulfill the functions of a photographing system and a long-time recording/recording system.

FIG. 3 shows a state in which the second unit 4 is removed by pressing the button 6 in FIG. 1B. 7 indicates the right two rails among the four rails fixed to the panel portion 2, and these rails are slidably fitted into holes provided in the main body 1. Reference numeral 13 indicates holes into which four pins (FIG. 7A, FIG. 9A) provided in the first and second units enter. 16 is a capstan; 17, 18, 20, and 21 are drawer members for mounting recording tapes in cassettes at predetermined positions in the main body 1; 17 is a right guide roller; 18 is a right inclined post; 20 21 is a left side inclined post, and 21 is a left side guide roller. In relation to the movement of this drawer member, the tension lever 1
9 moves, and the cassette eject locking pin 14 protrudes. 24 is a pin for releasing the reel brake built into the cassette, 25
is a lamp, 26 is a photodetector, and 25 and 2 are
Reference numeral 6 is used to detect the end of the tape by detecting transparent leader tape sections at both ends of the recording tape. The members with four holes 70, 71, 72, and 73 are located at the lower protrusion 77 of the reel shaft, respectively.
79, 81, 83 (FIGS. 8, 10) to rotationally drive the reel shafts 76, 78, 80, 82 (FIGS. 8, 10).

FIG. 4 is a partially cutaway top view of the information recording or reproducing apparatus shown in FIG. 3, and is for explaining the locking and release of the rail 7 and pin 27. The button 6 is supported by a bearing member 11 and a hole in the outer wall of the main body 1, and is urged outward by a spring 10. The members 8 and 9 are fixed to the button 6, and are fixed by sinking into the notch of the rail 7 and the notch 27' of the pin 27, respectively, and when the button 6 is pressed, these locks are released and the rail 7
The pin 27 becomes free, and the panel portion 2 can be moved and the first unit 3 or the second unit 4 can be attached or detached. Here, the panel portion is moved and the first and second units are attached and detached using one set of buttons 6, but it is also possible to use individual buttons or levers. The lever 12 locks the push button 6 in conjunction with the recording tape drawer members 17, 18, 20, and 21, and prevents the unit from being attached or detached while the drawer member is pulling out the recording tape, so as not to damage the recording tape. do.

About the reel shaft drive mechanism FIG. 5 shows an example of the reel shaft drive mechanism. Here, 53 is a motor, 54 is a pinion attached to the motor shaft, and 55 is an idler gear. The idler gear 55 is rotatable and is mounted so as to be rotatable around the central axis of the pinion 54 while meshing with the pinion 54. 57,5
8, 59, 61, 62, and 63 are all rotatable gears whose centers of rotation are fixed. When the motor 53 begins to rotate in the direction of the arrow, the idler gear 55 meshes with the gear 61 and transmits rotational driving force. These rotational directions are as shown in the figure, and the rotational driving force is 5.
4, 55, and 61 are pressed against each other. When the motor rotates in the opposite direction, the idler gear 55 separates from the gear 61 and meshes with the gear 57, transmitting rotational driving force. Gear 57, 59, 6
1 and 63, reel shaft drive hole members 71 and 7, respectively.
3, 70, and 72 (FIG. 4) are mounted coaxially, these reel shaft drive hole members can be rotated by the motor 53. In the illustrated example, the rotational driving force is transmitted from one motor 53 using the idler gear 55, but as a modification, one motor may be provided coaxially with the gears 58 and 62.
In the illustrated example, two sets of reel shaft drive members are rotated, but by increasing the number of gears in the gear train, three or more sets of reel shaft drive members are rotated.
It is also possible to exchange and use more than one set of recording tapes.

Regarding the Front Panel Section FIG. 6 is a back view of the panel section 2, with the rail 7 cut away. Rail 7 as shown
A hole is formed vertically through the inside of the panel, and by passing an electric wire, optical fiber, etc. through the hole, power and signals can be transmitted and received between the main body 1 and the panel section 2. Reference numeral 15 denotes an accidental erasure prevention switch, which prohibits recording depending on the state of this switch.

About the First and Second Units FIG. 7A is a perspective view showing the appearance of the first unit 3, with the cassette holder ejected. In addition, some outer walls and eject button 4
8 (FIG. 1A) is shown removed. Figure B is an enlarged perspective view of the locking mechanism. To explain how to attach and detach the first unit 3 to the main body with reference to FIG. 4, the four pins 27 on the bottom surface of the first unit enter through the holes 13, and the member 9 engages with the notches. Fixed. At this time, lower protrusions 77 and 79 (FIG. 8) of reel shafts 76 and 78 fit into drive hole members 70 and 71, respectively. Although not shown, holes into which the reel brake release pin 24 and end detection lamp 25 enter are also provided. Next, insertion and removal of the cassette will be explained.
In the state shown in FIGS. 7A and 7B, the cassette holder surrounded by the lid 28A, the lower surface and the side surfaces 29 includes levers 35 and 36 and a fixing plate 3 having a cam portion.
It is supported by a link mechanism consisting of 7 and a tension spring 38. When the cassette is inserted and the holder is pushed down, the pin 39 is locked by the member 40. One member 40 is provided on each side. 41 is a shaft that connects the members 40, and 42 is a shaft that urges the spring member 40 in the direction of arrow A. When the eject button 48 (FIG. 1A) is pressed, the member 40 rotates in the direction opposite to the arrow A, and the pin 39 is released. As a result, the link mechanisms 35 to 37 are actuated by the spring 38, and the cassette holder is raised to return to the state shown in FIG. 7, allowing the cassette to be taken out. Reference numeral 34 denotes an interlocking member for preventing accidental erasing, which is biased toward the cassette side by a plate spring (not shown), and protrudes (or enters) through a recess (or protrusion) for preventing accidental erasing in the cassette, and is connected to the switch 15 ( (Fig. 6), and pressing (or not pressing) this enables (or prohibits) recording. 43 is a movable member, 44 is a pin that is the rotation axis of the member 43, and 45 is a spring member 43 indicated by arrow B.
It is biased in the opposite direction. Pin 14 (Figure 3)
protrudes from the hole 33 (Fig. 8) to the first unit 3.
enter the inside of the unit and push the member 43 in the direction of arrow B,
One end of the member 43 goes under the member 40 and locks the ejecting operation. This prevents damage to the recording tape while it is being pulled out.

FIG. 8 is a back view of the first unit 3 viewed from the direction of X in FIG. 7A. Here, 30 is the upper surface of the cassette holder, 31 is a spring, and the upper surface 30
is attached to the lid 28A by a spring 31. A claw 32 is attached to the side plate 29 by a leaf spring or the like (not shown), and is used to position the cassette. 33 is a hole into which the aforementioned pin 14 enters. Reel shafts 76 and 78 are rotatably attached to the bottom of the casing of the first unit 3, and their lower protrusions 77 and 79 are configured to fit into the drive hole members 70 and 71, respectively. As described above (see FIG. 5), the motor 53
The reel shafts 76 and 78 can be rotationally driven by the rotation of the reel shafts 76 and 78. For example, by clockwise rotation of the motor 53, the take-up reel shaft 76 of the first unit 3 is driven through the gear 61, the drive hole member 70, and the lower protrusion 77 to run the recording tape.
On the other hand, the counterclockwise rotation of the motor 53 similarly drives the supply reel shaft 78 of the first unit 3 to rewind the recording tape.

9A is an external perspective view of the second unit 4, and FIG. 9B is an enlarged perspective view of the locking mechanism. Note that in FIGS. 9A and 9B, parts having the same functions as those in FIGS. 7A and B are given the same reference numerals. The second unit 4 differs from the first unit 3 in the shape of the cassette holder, the position and shape of the reel shafts 80 and 82, and the ejection inhibiting device, but is substantially the same as the first unit in other respects. The shape of the cassette holder and the position and shape of the reel shafts 80 and 82 are determined by the cassette used. Usually the second unit 4 holds a recording tape having a larger recording capacity than the first unit 3, and therefore its cassettes are larger than those of the first unit.
Regarding the ejection inhibiting device, 46 is a member forming the main body of the device, 47 is a spring, and the member 46 is a spring.
is biased by a spring 47 in the direction opposite to arrow B. And like the first unit, pin 14
(Fig. 3) enters through the hole 33 (Fig. 10) and pushes the member 46 in the direction of arrow B, which enters under the member 40 and locks the pin 39 and the member 40, prohibiting ejection. Note that 50 in FIG. 9A is a notch, which is provided to allow the rail (FIG. 3) to escape.

FIG. 10 is a back view of the second unit 4 seen from the direction of X in FIG. 9A. In the figure, 80 and 82 are reel shafts, 81 and 83 are 80 and 82, respectively.
The lower protrusions 81 and 83 are configured to fit into the drive hole members 72 and 73, respectively. For other parts, refer to section 8.
According to the diagram.

Installation of the power supply device In FIG. 7A, 51 indicates the portion of the first unit 3 other than the cassette holder and its support, which is hollow in this figure. The portions 51 can be placed on both the left and right sides as shown in FIG.
Therefore, a battery can be housed on one or both sides of the portion 51 to serve as a power source, especially for a portable camera. The power supply connection is made by connecting the terminal of the battery to the main body 1 or the front panel part using a connector or pin 27. Similarly, in FIG. 9A, 52 is the second
The lower part of the unit 4 is hollow in the figure. Therefore, a battery can be built in as described above, but since the cassette installed in the second unit is usually for long-term recording and playback, a power supply circuit such as an AC/DC converter adapter may be used instead of the battery. can be provided. By making the volume of the portion 52 larger than that of the portion 51, a large capacity power supply device can be provided in the former, and it is possible to adapt it to the length of the recording time.

Regarding the structure of the cassette: FIG. 11 shows an example of a cassette suitable for the first unit 3. 87 is a code indicating the entire cassette. Reels 88 and 89 are fitted with reel shafts 76 and 78, respectively. 90 is a recording tape wound on a reel. 91 and 92 are guide rollers, and the tape 90 is stretched over the opening of the cassette 87 by these guide rollers, and the tape 90 is stretched over the opening of the cassette 87.
21 is positioned inside the recording tape loop. 93 is the entrance of the ramp 25 (Fig. 3), 9
4 is a hole into which a reel brake release pin 24 (FIG. 3) enters. 95 and 97 are brake members,
Reference numerals 96 and 98 are springs that bias these brake parts, and 99 is a plate, and the plate 99 is connected by the pin 24.
is pushed up, and the brake members 95 and 97 are rotated to release the lock from the reels 88 and 89. Reference numeral 100 is a folding claw for preventing erroneous erasure, and the member 34 (FIG. 7A) is pushed by this claw to push the switch 15 (FIG. 6).

FIG. 12 shows an example of a cassette suitable for the second unit 4. Reference numeral 108 indicates the entire cassette. 109 and 110 are reels. Although the reel is large and the casing is also large, other parts are the same as the cassette 87 of the first unit 3, except for the brake mechanism described below.

In the figure, the brake lever L is biased upward in the drawing by a spring S, and the reels 109 and 11
0 hub is locked. When the cassette 108 is installed, the brake release pin (24 in Figure 4A)
enters through the hole 94 and hits the tapered portion of the upper end of the lever L in the drawing, the lever L is pushed down in the drawing and the locking of the reels 109 and 110 is released.

In FIGS. 11 and 12, the cassette 87 of the first unit and the cassette 10 of the second unit are shown.
8 to the main body 1, the recording tape drawer members 17, 18, 20, 21 are positioned so as to be located inside the tape loop in the cassette of the recording tape 90. In operating condition,
These drawer members pull out the recording tape by known means, and record or reproduce the tape by mounting it over a cylindrical drum, a pinch roller, a capstan, various guide rollers, and various magnetic heads. For example, when the recording tape is pulled out and its reverse operation is pulled back, the recording tapes of all cassettes are pulled out at the same position (for example, the pull-out members 17, 18, 20, 2 shown in FIG. 11).
Since the recording tape starts from and ends at the inactive position (1), the recording tape pull-out and pull-back mechanism is simplified and the operation is simple and reliable.

13 and 14 show modified examples of the reel shaft drive mechanism, in which the common reel shafts 22 and 23 are connected to the grooves 6 and 7 in conjunction with the movement of the rail 7, respectively.
4 and 65. FIG. 13 is a partially cutaway top view of the information recording or reproducing device main body 1, in which reference numeral 53 indicates a motor;
and 62 transfers the rotational force from the motor 53 to the reel shaft 2.
This is part of the gear train (Fig. 14) for transmitting data to the 2nd gear. 66 is a lever fixed to the rail 7, 67
is a pin installed at the tip of the lever 66, 68 is a lever, and 69 is a rotating shaft of the lever 68. The lever 68 has two cam parts, one of which is attached to the pin 67,
The other is engaged with the reel shaft 22. When the button 6 is pressed and the rail 7 is pushed into the main body 1, the lever 66 moves upwards in the paper, and the lever 68
is pushed by pin 67 and rotates counterclockwise around shaft 69. The rotation of the lever 68 causes the reel shaft 22 to move along the guide groove 64 in the direction of the arrow. The reel shaft 23 also moves at the same time by a similar mechanism.

FIG. 14 shows an example of a mechanism for transmitting rotational driving force by changing the position of the reel shaft. In the figure, 53 is a motor, 54 is a pinion attached to the motor shaft, and 55 is an idler gear, which is rotatable and rotatably attached around the pinion. 56, 57, 60, and 61 are gears with fixed shafts. 58, 59, 62, 63 are gears,
It is rotatable and has gears 57, 58, respectively.
It is rotatably attached around 61 and 62. The action of the idler gear 55 is similar to that shown in FIG. 5, and when the motor 53 rotates counterclockwise, the idler gear 55 meshes with the gear 60.
Gears 60, 61, 62, and 63 are rotationally driven in the direction of the arrow in the figure. Then, for example, the take-up reel shaft 22 attached to the gear 63 is driven to run the recording tape. When the motor 53 rotates clockwise, the idler gear 55 meshes with the gear 56, and the gears 56, 57, 58, and 59 are rotationally driven, and for example, the supply side reel shaft 23 attached to the gear 59 is driven, and the recording tape is rotated. Rewind. When the reel shafts 22 and 23 move as described above and the gears 63 and 59 occupy the positions indicated by the broken lines in the figure, the gears 62 and 58 also move and the gears 57, 5
8, 59 and 61, 62, 63 are never separated from each other, and rotational driving force is transmitted to them. In the illustrated example, one motor 53 drives the gear train and the reel shaft, but as a modification, the gears 61 and 57 may be driven by separate motors.

The first and second units in this example are basically equivalent to those shown in Figures 7 and 9, respectively, except that in Figures 7 and 9, the reel shaft is attached to the unit. Instead, holes into which the reel shafts 22 and 23 enter are provided in the bottom surfaces of both the first and second units, respectively. The cassettes that fit this example are the small cassette shown in Fig. 11 and the large cassette shown in Fig. 12.
However, unlike the above example, the shape and size of both reel shaft fitting parts must be the same.

Figures 4 to 12 and Figures 13 and 1
The reel shaft drive mechanism shown in FIG.
and the reels of the second unit are configured to be driven by a common drive member. In this way, many of the reel shaft drive devices can be used in common when recording tapes are exchanged, and the apparatus can be simplified. In both cases, the common driving member is the pinion 54 (Figs. 5 and 14) when driven by one motor, and when a motor is provided for each reel, the common driving member is the gear 62 or 58 in the former case, and the gear 62 or 58 in the latter case. Then gear 61 or 57
It is. The reel shaft drive mechanism may be modified in many ways in addition to the above. For example, in Fig. 13, the reel shafts 22 and 23 are fixed, the reels of the cassette on the first unit side are directly driven by these reel shafts, and the reels of the cassette on the second unit side are driven by gears between these reel shafts. It is possible to drive by conduction.

Although various devices such as the reel shaft drive mechanism described above have been described with respect to the embodiment shown in FIGS. 1A and B, these devices can basically be similarly applied to the embodiment shown in FIGS. 2A and B. . Note that in FIG. 2, the operating section can be provided on the back or side surface of the main body 1.

Since the present invention has the above-described structure and operation, based on this, by replacing and using tape holders of different sizes for a common information recording or reproducing device, the main body of the information recording or reproducing device can be used. When recording medium holding devices of different shapes or sizes are attached to the device, the external shape of the entire device can be made into a simple shape such as a regular hexahedron, regardless of which holding device is attached, and the mechanism of the main body of the device can be made simple. Most of it can be shared.

[Brief explanation of the drawing]

The drawings show a specific example embodying the invention, and FIGS. 1A and 1B show a first unit and a second unit, respectively.
A perspective view of an information recording or reproducing apparatus showing a first embodiment in which a unit is installed, and FIGS. 2A and 2B are a perspective view of an information recording or reproducing apparatus showing a second embodiment in which a first unit and a second unit are installed, respectively. FIG. 3 is a perspective view of FIG. 1B with the second unit removed, FIG. 4 is a partially cutaway top view of FIG. 3, and FIG. 5 is a plan view showing the reel shaft drive mechanism. , FIG. 6 is a back view of the front panel section, FIG. 7A is a perspective view showing the external appearance of the first unit, FIG. 7B is an enlarged perspective view showing the locking mechanism of FIG. 7
A back view of the first unit seen from the direction of X in Figure A,
Fig. 9A is a perspective view showing the external appearance of the second unit, Fig. 9B is an enlarged perspective view showing the locking mechanism in Fig. 9A, and Fig. 10 is a perspective view of the second unit as seen from the direction of 11 and 12 are plan views showing cassettes adapted to the first and second units, respectively. 13 and 14 relate to a modification of the reel shaft drive mechanism, FIG. 13 is a partially cutaway top view of the information recording or reproducing device with the second unit removed, and FIG. 14 is the reel shaft drive mechanism. FIG. In the figure, 1 is an information recording or reproducing device, 2, 2C, 2
D is the movable part, 3, 3C is the first unit, 4, 4C
is the second unit, 6 is the push button, 7 is the rail, 1
7 and 21 are right and left guide rollers, respectively, 18 and 20 are right and left inclined posts, respectively, 22, 76 and 80 are take-up side reel shafts, 2
3, 78 and 82 are supply side reel shafts, 53 is a motor, 54 is a pinion, 55 is an idler gear, 5
6 to 63 are gears, 70 to 73 are reel shaft drive hole members, 87 is a cassette for the first unit, 8
8 and 109 are take-up reels, 89 and 110 are supply reels, 108 is a cassette for the second unit, 8
7' is a holder for a small cassette, and 101' is a holder for a large cassette.

Claims (1)

[Scope of Claims] 1. A tape-shaped recording medium 90 is stretched and held on the front side, and a tape pull-out member 16 is provided on the front side.
An information recording or reproducing device which has an opening through which tape holders 3 and 21 enter and is capable of using a plurality of tape holders 3 and 4 of mutually different sizes, wherein each of the plurality of tape holders 3 and 4 is inserted into the device. The mounting mechanism includes a fixing member 13 that fixes the lower surfaces of the plurality of tape holders at a predetermined position in order to position the front surfaces of the plurality of tape holders at a common position. , a movable part 2 that moves according to the difference in position of the rear surface of the plurality of tape holders.