JPH0438748A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To make the inserting position of a small cassette clear, and to record and reproduce the small cassette without using an adapter by providing a recessed step part at the bottom part of a cassette holder. CONSTITUTION:The cassette holder 1 is exposed to this side, and the recessed step part 1a to a prescribed position. Then, it is recognized that an inserted cassette is the small cassette by a detecting switch, and a loading motor is started so as to load the small cassette 17. Thus, the position to which the small cassette is inserted is made clear, and simultaneously, the small cassette is prevented from being inserted into the position other than the prescribed position, and the small cassette can be recorded and reproduced even without using the adapter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing apparatus using two types of cassettes, large and small.

[Conventional technology]

FIG. 13 is a perspective view showing a conventional magnetic recording/reproducing device disclosed in, for example, Japanese Patent Application Laid-Open No. 59-22'7061.
In the figure, 29 is an insertion port for standard cassettes and adapters, 30 is an insertion port for small cassettes, 31 is an insertion port 3o for small cassettes, and FIGS. 14 and 15 are the apparatus I\L of FIG. 13, respectively. In the figure, 32 is an adapter (standard tape cassette) automatic attachment/detachment mechanism, 33 is a cassette holder on which a cassette is placed, and 34.35 is a vertical support plate. , 34a * 34b * 34 c ) 35 a
+35b, 35c are guide grooves provided on the vertical support plate 34.35, 36.3'i' are the side plates of the cassette holder 33, and 36a, 37a are provided on the lower part and front side periphery of the side plates 36, 37. A rack gear 38 is a rack gear 36a of the side plate 36.3'i' of the cassette holder 33,
A pinion meshes with 37a, 39 is a cassette loading motor, and 40 is a gear train for transmitting the driving force of the harrowing motor 39 to the cassette holder group.0 Figure 16 shows an example of an adapter for a small tape cassette, and the plate is removed. In the figure, 41 is an adapter for a small tape cassette, 41a is a front lid of the adapter 41, 43 is a small tape storage part of the adapter 41, 1
7 is a small tape cassette), l'i'a is the lid of the small cassette, 44 is a loading arm on the supply side provided in the adapter 41, 45 is a loading arm on the winding side provided in the adapter 41, and 46 is a loading arm on the winding side provided in the adapter 41. A take-up gear 47 for winding up the magnetic tape 100 of a small cassette 43 provided in the adapter 41 is a take-up reel provided in the adapter 41 that meshes with the take-up gear 46 . FIG. 17 is a plan view showing the configuration of a rotary head type magnetic recording/reproducing apparatus.
18 is a standard cassette; 18a is a lid of the standard cassette; 18 is a standard cassette; Reference numeral 19 denotes a tape guide 201 on the supply side for drawing the magnetic tape 100 from the small cassette 17 loaded in the standard melt type cassette]-8 and the adapter 41 and winding it around the drawer cylinder unit 24.
4 the same tape guide on the winding side, 21 a capstan for feeding the magnetic tape 100 at a constant speed, 22 sandwiching the magnetic tape 100 between it and the capstan 21 to apply the driving force of the capstan 2 to the magnetic tape 100. 25 is a tension pin for detecting the tension generated in the magnetic tape 100; 26 is a supply reel stand for feeding out the magnetic tape 100; 27 is a capstan 21
and a take-up side reel stand for winding up the magnetic tape 100 sent out by the pinch roller 22; 2B is a base on which each component is placed;

Next, the operation will be explained. The case where a standard type cassette is used will be explained. In Figure 14, the standard cassette (hereinafter referred to as cassette) is inserted into the standard cassette insertion slot 2 of the device.
Insert from 9. As shown in FIG. 15, when the cassette is inserted to a predetermined position, a loading switch (not shown) is turned on, the loading motor 39 is activated, and the driving force of the loading motor 39 is transmitted to the pinion 38 via the gear train 40. By transmitting driving force to the rack gear 37a meshing with this, the cassette holder 33 is driven, and the cassette 18 is loaded into the apparatus. Next, during recording and reproduction, the magnetic tape 100 is pulled out from the cassette 1B shown in FIG. Next, by pushing the pinch roller 22 against the capstan 21, driving force is transmitted to the magnetic tape 100, and the magnetic tape 100 is fed out. The magnetic tape 100 is supplied from the supply reel stand 26 and wound up by the take-up reel stand 27. At this time, magnetic tape 1■
The tension generated is detected by the tension ball 25,
It is controlled by varying the load on the supply reel stand 26 so that it remains constant, and signals such as video and audio are recorded on the magnetic tape 100 by the magnetic head 23. Next, the case where a small cassette is used will be explained. First, the adapter 41 is inserted into the standard cassette insertion slot 29. When the adapter 41 is inserted to a predetermined position, a detection switch (not shown) detects that it is an adapter, and then a loading switch (not shown) is turned on and the loading motor 39 is activated. Thereafter, the driving force of the loading motor 39 is transmitted to the cassette holder 33 in the same manner as in the case of the standard type cassette, and the driving force of the loading motor 39 is transmitted to the cassette holder 33.
starts to move, and the small cassette insertion slot 30 and adapter 41
When it moves to a position where it matches the small cassette storage section 43, it stops, and the door 31 of the small cassette insertion opening opens. Here, the small cassette 17 is loaded into the adapter 41 through the small cassette insertion opening 30, and the door 31 is closed.

Then, the supply side loading arm 4 in the adapter 41
4 and the winding side loading arm 45, the magnetic tape 100 is pulled out from the small cassette 17, and the tape path in the adapter 41 is made equal to that of a standard cassette (FIG. 23). Then, the cassette holder 33 is driven again and the adapter 41 is loaded into the device. After that, the magnetic tape 100 fed out by the capstan 21 and the pinch roller 22 is wound up by the take-up reel 47 and the take-up gear 46, which engage with the take-up reel stand 27. are the same.

[Problem to be solved by the invention]

Conventional magnetic recording and reproducing devices are configured as described above, so when using a small cassette, an adapter is required, and not only is it necessary to search for an adapter each time, but it is also possible to accidentally replace the small cassette with a standard cassette. There is a problem in that if the tape is inserted into the insertion slot, the device and the magnetic tape may be damaged.

This invention was made to solve the above-mentioned problems, and it is possible to record on a small cassette without using an adapter.
This allows for playback and prevents damage to the device or magnetic tape even if a cassette is inserted by mistake! -1 The purpose is to obtain a magnetic recording and reproducing device.

[Failure to solve the problem]

In the magnetic recording/reproducing device according to the present invention, a member for preventing erroneous insertion is provided in the cassette holder so that the height of the cassette insertion slot is lower than the height of the small tape cassette, and a member for preventing the small cassette from being inserted is provided in the bottom portion on which the small cassette is placed. It is also slightly wider in width and has a recessed step portion deep enough to avoid the erroneous insertion prevention member.

Further, in order to achieve the same purpose, the erroneous insertion prevention member is provided with a notch portion slightly wider than the width of the small cassette.

[Effect]

In the magnetic recording/reproducing device of the present invention, the insertion position of the small cassette is made clear by the recessed step provided at the bottom of the cassette holder, and the small cassette is inserted in the left and right direction by being accommodated in the recessed step. The device can be inserted into the device even though its position is restricted.

Furthermore, in the case where a notch is provided, the small cassette can be inserted without erroneous insertion by inserting the small cassette along both side walls of the notch.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a perspective view showing a magnetic recording and reproducing apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a cassette holder on which a standard cassette 18 and a small cassette 17 are placed. 2, 3, and 4 are perspective views showing the state in which the small cassette 17 is placed on the cassette holder 1, perspective views showing the configuration of the cassette holder 1, and states in which the small cassette 17 is placed in the cassette holder 1. In the figure, 1a is a concave stepped portion, 2 is a cassette holder that holds the small cassette 17, 2a is a spring A for urging the cassette holder 2, and 3 is a cassette holder that is attached to the standard cassette 18. G1.
The small cassette 1 is a rotatable standard cassette holder, and the small cassette 17 is inserted in a predetermined position.
7, a position regulating member for the left and right force directions, and a mis-insertion prevention member for preventing the small cassette 17 from being inserted in a position other than the predetermined position; 3a for urging the mis-insertion prevention member 3; Spring B, 3b is a notch slightly wider than the width of the small cassette provided in the incorrect insertion prevention member 3, and 4 is a winding side opening lever 15 that prevents rotation of the incorrect insertion prevention member 3.
are supply side lock levers 4a and 5a are lock levers 4 and 5.
4b, 5bfl: abutting portion with the standard cassette 18, 6.7 is the lock lever 4,
This is a spring C for biasing 5. FIG. 5 is a side sectional view of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and in the figure, reference numeral 8 indicates a lock 117a of a small cassette.
and a door opener for opening the lid; 9 is a rotation drive mechanism for the small cassette door opener 8; 10 is a rear positioning pin for the small cassette 17; 11 is a front receiving portion of the small cassette 17; 12 is the front side of the standard cassette 18. A positioning bin, 13 is a rear receiving portion of the standard cassette 18, 14 is a door opener for the standard cassette 18, 15 is a cassette insertion opening, and 16 is a door of the cassette insertion opening. FIG. 12 is a plan view showing the configuration of a magnetic recording and reproducing apparatus according to one embodiment of the present invention (+11). In FIG. , mI when a small cassette is loaded into the device.
This is an I/l1vJ gear that engages with and drives the take-up side reel gear l'i'l) of the small cassette.

Next, the operation will be explained. First, a case where a small cassette is used will be explained. As shown in Fig. 1, press the open/close button of the device (not shown) to expose the cassette holder 1 to the front side of the device, and insert the small cassette 17 through the insertion slot 15 into the concave stepped portion 1a of the cassette holder 1 to a predetermined position. Insert (Figures 2 and 4). Alternatively, if the recessed stepped portion 1a is not provided, it is inserted along the side wall of the notch 3b. Then, as shown in Fig. 6, the detection switch (not shown) recognizes it as a small cassette, and when the cassette holder 1 is further pushed in, or the record or playback button (not shown) or the open/close button of the device is pressed, the loading motor starts. A switch (not shown) is turned on, a loading motor (not shown) is started, and the driving force of the loading motor is transmitted to the cassette holder 1, driving the cassette holder 1 and loading the small cassette 17 into the device (the first Figure 6). At this time, the small cassette 17 is opened by the small cassette door opener 8.
is opened, and on the apparatus side, a rear positioning bin 10 for small cassettes, a front receiving part 11, tape guides 19, 20, and other tape drawer members are waiting at predetermined positions. The small cassette 17 is a cassette presser 2 for small cassettes.
The small cassette is pressed against the rear positioning pin 10 and the front receiving part 11 and loaded into the apparatus. Then the first
As shown by the dashed line in Figure 2, the magnetic tape 100 is pulled out from the small cassette 1, wound around the cylinder unit 24, and stands ready for recording and playback. 21 and pinch roller 22, the magnetic tape 100 is taken up by the drive gear 48 engaged with the take-up reel stand 27 and the take-up reel gear l'i'b in the small cassette 17, and then wound by the magnetic head 23. The signal is recorded and played back.

Next, when inserting the small cassette 17 into the cassette holder 1, what will happen if the small cassette 17 is inserted in the wrong position will be described below.

FIG. 4 is a side cross-sectional view of the cassette holder 1, and as shown in the figure, the erroneous insertion prevention member 3 normally has a lock lever 4,
5 engaging portion 4a,! Rotation is restricted by 5a. FIG. 7 is a front view of the cassette holder 1, and in this state, as is clear from FIG.
7 is a position other than the concave stepped portion 1a of the cassette holder l;
However, at positions other than the notch 3b, the height is restricted (as indicated by the two-dot chain line in the figure), and insertion into the cassette holder 1 is prevented. If you try to load the cassette into the device in this state, the detection switch will not operate, so the device will recognize that no cassette has been inserted, and the cassette holder 1 will move to the intermediate stop position set in the middle of horizontal movement, as shown in Figure 6. The case of a standard type cassette of order 0, which stops at (-dotted chain line), will be explained.

In the same way as for small cassettes, expose the cassette holder 1 to the front side of the device (Fig. 1), and then remove the cassette holder 1.
Insert the standard cassette 1st.

At this time, as shown in FIG. 9, the advancement type cassette 18 comes into contact with the contact portions 41) and 51) of the lock levers 41) and 51), and the lock levers 41) and 51) rotate and the lock levers 4 and 5 rotate. ，
The engaging parts 4a and 5a of 5 are separated from the erroneous insertion prevention member 3, the erroneous insertion prevention member 3 becomes rotatable (double-dashed line), and by further inserting the standard cassette 18, the erroneous insertion prevention member 3 is moved away from the erroneous insertion prevention member 3. Figure 8 for rotation.

9 and 10), the detection switch (not shown) recognizes it as a standard cassette, and the loading motor starts in the same way as for small cassettes, and the cassette holder 1
to drive. Next, the door opener 8 for the small cassette is rotated by the rotation drive mechanism 9 to avoid interference with the standard cassette 18, and on the device side, the front positioning pin 12 for the standard cassette and the rear holder of the standard cassette 1B are 13
A tape pull-out member such as a tape guide 19 or 20 is waiting at a predetermined position. In this way, standard type cassette) 1B
The lid 18a of the standard cassette is opened by the standard cassette door opener 14, and the cassette is loaded into the device (11th
Figure 12 (solid line section). Thereafter, recording and reproduction are performed in the same manner as in the small cassette.

〔Effect of the invention〕

According to the invention of claim 1, an incorrect insertion prevention member is provided in the cassette holder so that the height of the cassette insertion slot is lower than the height of the small tape cassette, and the bottom surface on which the small cassette is placed. The width of the small cassette is slightly below the floor, and by providing a concave step with a depth that can avoid the erroneous insertion prevention member described in h, the position to insert the small cassette becomes clear, and it is possible to insert the small cassette at the specified position. This has the effect of preventing insertion into a device other than the cassette, making it possible to record and reproduce information on a small cassette without using an adapter, and providing an easy-to-use device.

Moreover, in the invention of claim 2, since the erroneous insertion prevention member is only provided with a notch, the object can be achieved with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a small cassette placed on a cassette holder, and FIG. 3 is a perspective view showing the structure of the cassette holder. , FIG. 4 is a side view showing a state in which a small cassette is placed on a cassette holder, and FIG. 5 is a side sectional view showing a state in which a small cassette is placed in a cassette holder of a magnetic recording/reproducing apparatus according to an embodiment of the present invention. FIG. 6 is a side sectional view showing a state in which a small cassette is loaded into the device;
Figure 7 is a front view showing a small cassette placed on the cassette holder, Figure 8 is a perspective view showing a standard cassette placed on the cassette holder, and Figure 9 is a standard cassette placed on the cassette holder. Side view showing the condition, 1st
Figure 0 is a side sectional view showing a standard cassette placed on a cassette holder of a nonmagnetic recording/reproducing device according to an embodiment of the present invention, and Figure 11 is a side sectional view showing a standard cassette loaded into the device. 12 is a plan view of the device showing the state in which a magnetic tape is pulled out from a small cassette and a standard cassette for recording or reproduction, FIG. 13 is a perspective view showing a conventional magnetic recording and reproducing device, and FIG. 14 15 is a plan view of an automatic adapter attachment/detachment mechanism in a conventional device, FIG. 15 is a side view of the same, and FIG. 16 is an example of an adapter for a small cassette.
FIG. 17 is a plan view showing the state with the plate removed, and FIG. 17 is a plan view showing the configuration of the magnetic recording/reproducing device. In the figure, 1 is the cassette holder, 'la is the concave stepped part, and 3
3a is a spring, 31) is a notch, and 4. is an incorrect insertion prevention member.
5 is the lock lever 41), 5tl is the contact part, 6゜7
17 is a small cassette, and 18 is a standard cassette. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A magnetic recording and reproducing device in which a standard-sized tape cassette or a small tape cassette is selectively placed on the cassette holder and installed in the recording and reproducing device main body, and the height of the cassette insertion slot in the cassette holder is adjusted. An erroneous insertion prevention member is provided so as to be lower than the height of the small tape cassette, and a concave stepped portion is provided on the bottom surface on which the small cassette is placed, slightly wider than the width of the small cassette and deep enough to avoid the erroneous insertion prevention member. A magnetic recording and reproducing device characterized in that the cassette holder is provided with engaging portions on both sides of the cassette holder for a lock lever that comes into contact with a standard-sized tape cassette to release the lock and release the erroneous insertion prevention member. . (2) A magnetic recording/playback device in which a standard-sized tape cassette or a small tape cassette is selectively placed on a cassette holder and installed inside the recording/playback device, and the height of the cassette insertion slot inside the cassette holder is reduced. Install a member to prevent incorrect insertion so that it is lower than the height of the tape cassette,
Providing the erroneous insertion prevention member with a notch slightly wider than the width of the small cassette and having a shape that allows the erroneous insertion prevention member to be avoided, and on both sides of the cassette holder, the cassette holder comes into contact with a standard size tape cassette to release the lock; A magnetic recording and reproducing device characterized in that it is provided with an engaging portion of a lock lever that releases the erroneous insertion prevention member.