JP2519072B2 - Cassette loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mounting device, and more particularly to a cassette mounting device that can mount not only standard cassettes but also smaller cassettes.

Currently, standard cassettes and smaller cassettes smaller than this are commercially available as cassettes used in video tape recorders.

To attach a small cassette to a video cassette recorder for a standard cassette, a separate adapter was used, which was inconvenient.

Therefore, the advent of a cassette mounting device that allows a small cassette to be mounted as it is without using an adapter has been awaited.

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 61-269257 discloses a cassette mounting device which can mount a cassette of a certain size and a smaller cassette. In this device, the lateral width dimension of the holder into which the cassette is inserted is variable.

Further, there is also an apparatus in which a small cassette is guided and inserted into one side surface of the holder.

Both of them have a structure in which the cassette is inserted through the opening of the front panel of the video tape recorder.

On the other hand, Japanese Patent Application Laid-Open No. 61-182660 discloses a cassette mounting device using a cassette tray. Generally, the cassette loading device is provided with means for preventing erroneous loading of the cassette. In the above cassette mounting device, a protrusion is provided at a predetermined portion of the cassette tray, and when the cassette is placed on the cassette tray in the normal orientation, the recess on the bottom surface of the cassette fits into the protrusion, When the cassette is placed normally and the cassette is placed on the cassette tray in a direction different from the above, the bottom surface of the cassette abuts against the protrusion so that the cassette floats above the cassette tray. It is a thing.

Problems to be Solved by the Invention The former device (Japanese Patent Laid-Open No. 61-269257) has a problem that the structure is complicated.

On the other hand, in a device in which a small cassette is inserted by being guided by one side surface of the holder, the small cassette must be inserted deeply into the holder, which makes it difficult to operate, and the small cassette may not be operated due to an operation error. There is a problem in that it may be tilted, the operability is poor, and the stability is poor.

In the latter case (Japanese Patent Laid-Open No. 61-182660), whether or not the cassette is normally placed depends on the visual judgment of the operator, and the cassette is normally placed. However, there is a problem in that there is a risk that the operator may mistakenly make a wrong decision to operate the cassette mounting mechanism.

If the cassette mounting operation is performed in a state where the cassette is not properly mounted, not only the cassette is not mounted properly but also the cassette itself is damaged.

It is an object of the present invention to provide a cassette mounting device that solves the above problems.

Means for Solving the Problems As a first invention, a cassette table movably provided in a recording / reproducing apparatus main body in a horizontal direction, and a cassette table movable in the horizontal direction together with the cassette table in a vertical direction independently of the cassette table. A rectangular shape that is movably provided in the same shape and has a size and shape corresponding to a standard cassette, and has a concave part having a size and shape corresponding to a small cassette that is smaller than the standard cassette in a part thereof. And the cassette tray that is pulled out forward from the front panel of the main body of the recording / reproducing apparatus and on which the standard cassette or the small cassette is selectively placed, so that the cassette table can be pulled into the main body of the recording / reproducing apparatus. The cassette table moving mechanism to be moved and the cassette tray pulled into the main body of the recording / reproducing apparatus. In a cassette mounting device having a cassette tray elevating mechanism for lowering and moving the cassette to the mounting position, the cassette tray is mounted on the standard cassette mounting portion and the small cassette mounting portion in a direction other than the normal orientation. Is provided with an erroneous placement preventing member that abuts the bottom surface of each cassette to prevent normal placement of each cassette, and a standard cassette placing portion and a small cassette placing portion of the cassette tray. In each of the above, at least one diagonal line is provided with one cassette detection switch which is operated by being pushed by the bottom surface of each cassette, in the vicinity of both ends, and only when each cassette is normally mounted. Both of the two cassette detection switches arranged on each of the mounting portions are operated, and a signal from the cassette detection switch is supplied. , The operation of the cassette table moving mechanism and the cassette tray elevating mechanism is performed only when a signal indicating that both of the two cassette detection switches arranged on any one of the mounting portions are in the operating state is supplied. A control circuit for controlling the mounting operation of the cassette is provided.

As a second invention, a cassette table is provided in the recording / reproducing apparatus main body so as to be movable in the horizontal direction, and a cassette table is provided so as to be movable in the horizontal direction together with the cassette table and independently of the cassette table in the vertical direction. A rectangular cassette tray having a size and shape corresponding to a standard cassette, and a part thereof having a recessed part having a size and shape corresponding to a small cassette smaller than the standard cassette, and the recording / reproducing A cassette table moving mechanism that moves the cassette table so that the cassette tray, which is pulled out forward from the front panel of the apparatus body and on which the standard cassette or the small cassette is selectively placed, is pulled into the recording and reproducing apparatus body, The cassette tray drawn into the main body of the recording / reproducing apparatus is lowered to load the cassette. In a cassette mounting device having a cassette tray lifting mechanism for moving the cassette tray to a position, when the cassettes are mounted in a direction other than the normal direction on the standard cassette mounting part and the small cassette mounting part of the cassette tray, An erroneous placement prevention member is provided to prevent the bottoms of the cassettes from coming into contact with each other, and at least one of the standard cassette placement portion and the small cassette placement portion of the cassette tray is provided. One cassette detection switch, which is operated by being pushed by the bottom surface of each of the above-mentioned cassettes, is provided near both ends of the diagonal line, and the cassette detection switches are arranged on the respective mounting parts only when the cassettes are properly mounted. Both of the two cassette detection switches are operated, and a signal from the cassette detection switch is supplied to move the cassette table. The operation of the mechanism and the cassette tray elevating mechanism is carried out only when the signal indicating that both of the two cassette detection switches arranged on any one of the mounting portions is in the operating state is supplied. The operation is controlled so that whether or not one of the cassettes is loaded is determined based on a signal indicating that both of the two cassette detection switches arranged on any one of the loading sections are in the operating state. A control circuit for identification is provided.

Action The arrangement of the cassette detection switch and the presence of the erroneous placement prevention projection ensure the detection of an abnormality in the cassette placement state.

The control circuit prevents the cassette mounting operation from being performed while the cassette mounting state is abnormal.

Embodiment FIG. 1, FIG. 2 and FIG. 3 are views showing a cassette mounting state of an embodiment of the cassette mounting apparatus of the present invention.

In each figure, 1 is a recording / reproducing apparatus main body, 2 is its front panel, 3 is an opening, and 4 is a guide drum.

Reference numeral 5 denotes a rectangular frame-shaped cassette table, which is provided on the apparatus body 1 so as to be movable in the horizontal direction as indicated by arrows X ₁ and X ₂ .

A cassette table moving mechanism 6 is operated by a motor 7 to move the cassette table 5.

Reference numeral 8 denotes a cassette tray, which has a rectangular dimension and shape corresponding to the bottom surface of a standard cassette described later, and is supported by the cassette table 5.

A cassette tray lifting mechanism 9 is operated by a motor 10 to vertically move the cassette tray 8 independently of the cassette table 5 as shown by arrows Z ₁ and Z ₂ in FIGS. 4 and 5. Let

The above cassette loading device operates generally as follows. The operation is controlled by the control circuit 11.

Initially, the cassette table 5 is retracted into the apparatus main body 1 as shown in FIG.

When the button 12 is operated, the motor 7 starts and rotates in the reverse direction, the cassette table moving mechanism 6 operates, and the cassette table 5 moves in the direction of arrow X ₂ to the positions shown in FIGS. 1 and 3.
The cassette tray 8 is supported by the cassette table 5, moves together with the cassette table 5, and projects forward from the front panel 2.

The standard cassette 13 shown in FIG. 6 is placed on the cassette tray 8 from above as indicated by the chain line.

When the button 12 is operated again, the motor 7 starts again and rotates normally, the cassette table moving mechanism 6 operates, and the cassette table 5 moves in the direction of arrow X ₁ to the position shown in FIG. The cassette tray 8 moves together with the cassette table 5, and the standard cassette 13 is pulled into the apparatus main body 1. The cassette tray 8 is released from the support by the cassette table 5.

Subsequently, the motor 10 is started to rotate in the normal direction, the cassette tray elevating mechanism 9 operates, and the cassette tray 8 moves independently of the cassette table 5 in the direction of arrow Z _{1 as} shown in FIG. Lower to the position shown.

The standard cassette 13 descends together with the cassette tray 8, the supply reel 14 and the take-up reel 15 are engaged with the supply reel shaft and the take-up reel shaft (both not shown), and are pressed against the positioning pins 16 to form the magnetic tape. The center of the width direction 17 is attached to a predetermined position with a height H. Thereafter, tape loading is performed, the magnetic tape 17 is wound around the guide drum 4, and recording / reproducing is performed. In FIG. 1, 18 is an opening for a supply reel shaft, and 19 is an opening for a take-up reel shaft.

When the cassette eject operation is performed, each of the above mechanisms operates in the reverse order and in the opposite direction, and the standard cassette 13 is placed on the cassette tray 8 so that the apparatus main body 1 as shown in FIGS. It is separated to the outside.

 Next, the main part of the present invention will be described.

Reference numerals 20 and 21 denote cassette detection switches, which are arranged near both ends of one diagonal line 22 of the cassette tray 8.
As shown in FIG. 7, the cassette detection switches 20, 2
1 has actuating pins 20a and 21a.
The a and 21a are attached so as to project from the upper surface of the cassette tray 8.

Reference numeral 23 denotes an erroneous placement preventing projection, which is formed on the cassette tray 8. The protrusion 23 is formed at a portion of the bottom surface 24 facing the recess 25 when the standard cassette 13 is placed in a normal orientation. This part is approximately in the center of the cassette tray 8.

The eighth embodiment is smaller than the standard cassette 13 in the eighth embodiment.
The small cassette 30 shown in the figure is also mountable.

On the cassette tray 8, a cassette tray portion 31 having a size and shape corresponding to the bottom surface of the small cassette 30 is formed in a concave shape.

Cassette detection switches 33 and 34 are provided near both ends of one diagonal line 32 of the cassette tray portion 31. 33a, 34a
Is an operating pin and is located at a height lower than the upper surface of the cassette tray 8.

The standard cassette 13 is placed as shown in FIGS. 9 and 10, and the small cassette 30 is placed as shown in FIGS. 11 and 12.

FIG. 13 shows the relationship between the cassette mounting state and the ON / OFF state of the switch. ON is indicated by "1" and OFF is indicated by "0". As a result, a set of four detection signals can be obtained by indicating the state of the upper surface of the cassette tray 8 and the mounting state of the cassette.

When the cassette is not placed, as shown in FIG. 7, the switches 20, 21, 33 and 34 are all in the OFF state, and the detection signal becomes "0000".

FIG. 9 shows a state in which the standard cassette 13 is normally placed. The protrusion 23 fits into the recess 25, and the standard cassette 13 abuts the cassette tray 8 and is placed horizontally. The bottom surface 24 pushes the operating pins 20a, 20b, and the switches 20, 21 are turned on. Actuating pins 33a, 34a are not pushed, switches 33, 34 are OFF
It remains. The detection signal is "1100".

FIGS. 10A and 10B show a state in which the standard cassette 13 is placed in an abnormal orientation. Standard cassette 13 is a protrusion
23, and a part thereof floats above the cassette tray 8. The switch 20 (or the switch 21) is turned on, and the remaining switches 21, 33, 34 (or the switches 20, 33, 34) remain off. The detection signal is “1000” (or “0100”).

FIG. 11 shows a state in which the small cassette 30 is normally placed. A brake release pin (not shown) for the standard cassette 13 of the apparatus body 1 fits into the recess 35 (see FIG. 8). The small cassette 30 contacts the cassette tray portion 31 and is placed horizontally. The bottom surface 36 pushes the operating pins 33a, 34a,
The switches 33 and 34 are turned on. The switches 20 and 21 remain off. The detection signal is “0011”. Figure 12 (A),
(B) shows a state in which the small cassette 30 is placed in an abnormal orientation. The small cassette 30 comes into contact with the protrusion 23 and the like, and a part of the small cassette 30 floats above the cassette tray unit 31. The switch 33 (or the switch 34) is turned on, but the switch 34 (or the switch 33) remains off. Switches 20, 21 are also OF
It remains F. The detection signal is "0010" (or "0001")
Becomes

The above detection signal is supplied to the control circuit 11,
Controls the operation of the cassette table moving mechanism 6 (motor 7) and the cassette tray elevating mechanism 9 (motor 10) according to the detection signal at that time.

The control circuit 11 is composed of a microcomputer.

The operation of this microcomputer will be described below with reference to FIG.

First, it is judged whether or not the detection signal is "0000" (step 40). If the result of the determination is "YES", the process proceeds to the required cassette loading / standby process (step 4).
1).

When the determination result is "NO", it is determined whether or not the detection signal is "0011". (Step 42). If the determination result is “YES”, the process proceeds to the small cassette in-process for mounting the small cassette 30 at the predetermined mounting position. (Step 43).

If the determination result is "NO", it is determined whether or not the detection signal is "1100" (step 44). The judgment result is "YE
In the case of "S", the process proceeds to the standard cassette in-process for mounting the standard cassette 13 at the predetermined mounting position (step 4).
Five).

If the determination result is "NO", the state of the cassette tray 8 is determined in step 46.

Here, the judgment result is “NO”, as shown in FIG. 10 or FIG. 12, that the standard cassette 13 or the small cassette 30 is placed in an abnormal state, or it is placed normally at first. Although it has been done, it means that it moved unnecessarily in the process of moving and became an abnormal state.

When it is determined that the cassette tray 8 is stopped (the state shown in FIG. 1), a flag is set to reject the input from the button 12 (step 47).

As a result, when the standard cassette 13 or the small cassette 30 is erroneously placed in an abnormal state, the cassette table moving mechanism 6 does not operate even if the button 12 is operated, and the cassette mounting operation is not started. Incorrect mounting is reliably prevented.

Next, the operation of the above microcomputer when the mounting state of the cassettes 13 and 30 becomes abnormal during the process of mounting and removing the cassette will be described.

When it is determined in step 46 that the cassette tray 8 is moving horizontally, it is determined in step 48 whether the moving direction is the arrow X ₁ direction.

When the judgment result is "YES" (the process of mounting operation),
The motor 7 is reversed and reversed (step 49). As a result, the cassette tray 8 is returned to the position shown in FIG.

When the result of the determination is "NO" (the process of the disengagement operation), the rotation of the motor 7 is continued (step 50). As a result, the cassette tray 8 moves to the position shown in FIG.

If it is determined in step 46 that the cassette tray 8 is moving vertically, the movement direction is indicated by the arrow in step 51.
Judge whether it is in the Z ₁ direction.

When the judgment result is "YES" (the process of mounting operation),
The motor 10 is reversed and reversely rotated, and then the motor 7 is reversely rotated (step 52). This allows the cassette tray 8
Moves first in the direction of arrow Z ₂ and then in the direction of arrow X ₂ , and is returned to the position shown in FIG.

If the determination result is “NO” (when the cassette placement state becomes abnormal in the initial stage of the detaching operation), step 53
Then, it is determined whether or not the standard cassette 13 has been placed.

If the result of the determination is "YES", the motor 10 is reversed to rotate normally (step 54). This allows a standard cassette
13 is returned to the mounting position shown in FIG.

When the determination result is "NO" (when the small cassette 30 is placed), the motor 10 is reversed to rotate normally (step 55). As a result, the small cassette 30 is returned to the mounting position shown in FIG.

As can be seen from the above, the cassette mounting state is abnormal during the cassette loading operation, that is, the cassette tray 8 is moving in the arrow X ₁ direction or the cassette tray 8 is moving in the arrow Z ₁ direction. In this case, the cassette loading operation does not proceed any further, and the cassette tray 8 is returned to the position shown in FIG. Therefore, erroneous mounting of the cassette is surely prevented.

Effects of the Invention As described above, the cassette mounting apparatus according to the present invention has the following features.

If the cassette is not placed on the cassette tray abnormally, the cassette loading operation is not performed.Therefore, the cassette loading operation is performed despite the abnormal loading state of the cassette on the cassette tray. It is possible to reliably prevent the occurrence of an accident that damages the cassette and the mechanism.

With the configuration in which the cassette detection switch is provided near both ends of the diagonal line of the cassette tray and the erroneous placement preventing projection is provided on the cassette tray, it is possible to reliably detect the placement error of the cassette.

Since the standard cassette and the smaller cassette smaller than the standard cassette can be selectively placed in one cassette tray, the operability is excellent.

Since it can automatically identify whether the standard cassette or the small cassette is installed, it is extremely convenient.

[Brief description of drawings]

FIG. 1 is a plan view showing a state of a cassette mounting apparatus according to an embodiment of the present invention when a cassette is placed, FIGS. 2 and 3 are front and side views of the apparatus shown in FIG. 1, respectively. The figure shows a state in which the cassette tray is pulled into the main body of the apparatus. Fig. 5 shows the state in which the cassette tray is lowered and the cassette is mounted. Fig. 6 is a perspective view of a standard cassette. 7 is a view showing a cassette tray, FIG. 8 is a perspective view of a small cassette, FIG. 9 is a view showing a normal loading state of a standard cassette, and FIGS. 10A and 10B are abnormal loading of the standard cassette. FIG. 11 is a diagram showing a state where the small cassette is normally placed, FIGS. 12A and 12B are diagrams showing a state where the small cassette is abnormally placed, and FIG. 13 is a diagram showing how the cassette is placed. FIG. 14 is a diagram showing the detection signal according to the state, and FIG. 14 is a micro controller which constitutes the control circuit in FIG. It is a flowchart of operation | movement of a computer. 1 ... Recording / reproducing apparatus main body, 5 ... Cassette table, 6
…… Cassette table moving mechanism, 7,10 …… Motor, 8…
… Cassette tray, 9 …… Cassette tray lifting mechanism, 11
...... Control circuit, 12 ...... Button, 13 ...... Standard cassette, 20,21,
33,34 …… Cassette detection switch, 20a, 21a, 33a, 34a ……
Actuating pins, 22, 32 ... Diagonal line, 23 ... Misplacement prevention projection, 24, 36 ... Bottom, 25, 35 ... Recess, 30 ... Small cassette, 31 ... Cassette tray section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Harumatsu 3-12 Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa Japan Victor Company of Japan, Ltd. (56) Reference JP-A-61-182660 (JP, A) JP-A-SHO 61-269257 (JP, A) Actually opened 62-129141 (JP, U) Actually opened 62-73345 (JP, U)

Claims (2)

(57) [Claims] 1. A cassette table movably provided in the recording / reproducing apparatus main body in a horizontal direction, and a cassette table movably in a horizontal direction together with the cassette table so as to be movable in a vertical direction independently of the cassette table. A rectangular cassette tray having a size and shape corresponding to a cassette, and a part thereof having a recess having a size and shape corresponding to a small cassette which is smaller than the standard cassette, and the recording / reproducing apparatus. A cassette table moving mechanism that moves the cassette table so as to draw the cassette tray, which is pulled out from the front panel of the main body and on which the standard cassette or the small cassette is selectively placed, into the main body of the recording / reproducing apparatus; The cassette tray pulled into the main body of the recording / reproducing device is lowered to mount the cassette. In a cassette mounting device having a cassette tray elevating mechanism to be moved, when the cassettes are mounted on a standard cassette mounting portion and a small cassette mounting portion of the cassette tray in a direction other than a normal direction, the cassettes An erroneous placement preventing member for preventing normal placement of the cassettes by contacting the bottom surface of the cassette is provided, and at least one diagonal line is provided on each of the standard cassette placement portion and the small cassette placement portion of the cassette tray. Near both ends,
One cassette detection switch, which is operated by being pushed by the bottom surface of each of the placed cassettes, is provided, and two cassettes are detected for each cassette only when the cassettes are properly placed. Both of the switches are operated, and the operations of the cassette table moving mechanism and the cassette tray elevating mechanism are arranged on any one of the mounting portions by being supplied with a signal from the cassette detection switch. A cassette mounting apparatus having a control circuit for controlling the mounting operation of the cassette only when a signal indicating that both of the two cassette detection switches are operating is supplied. 2. A cassette table movably provided in the main body of the recording / reproducing apparatus in the horizontal direction, and a cassette table movably in the horizontal direction together with the cassette table and independently of the cassette table in the vertical direction. A rectangular cassette tray having a size and shape corresponding to a cassette, and a part thereof having a recess having a size and shape corresponding to a small cassette which is smaller than the standard cassette, and the recording / reproducing apparatus. A cassette table moving mechanism that moves the cassette table so as to draw the cassette tray, which is pulled out from the front panel of the main body and on which the standard cassette or the small cassette is selectively placed, into the main body of the recording / reproducing apparatus; The cassette tray pulled into the main body of the recording / reproducing device is lowered to mount the cassette. In a cassette mounting device having a cassette tray elevating mechanism to be moved, when the cassettes are mounted on a standard cassette mounting portion and a small cassette mounting portion of the cassette tray in a direction other than a normal direction, the cassettes An erroneous placement preventing member for preventing normal placement of the cassettes by contacting the bottom surface of the cassette is provided, and at least one diagonal line is provided on each of the standard cassette placement portion and the small cassette placement portion of the cassette tray. Near both ends,
One cassette detection switch, which is operated by being pushed by the bottom surface of each of the placed cassettes, is provided, and two cassettes are detected for each cassette only when the cassettes are properly placed. Both of the switches are operated, and the operations of the cassette table moving mechanism and the cassette tray elevating mechanism are arranged on any one of the mounting portions by being supplied with a signal from the cassette detection switch. Only when a signal indicating that both of the two cassette detection switches are in the operating state is supplied, control is performed so that the above cassette mounting operation is performed, and the two cassettes placed on either one of the mounting sections are controlled. Based on a signal indicating that both of the cassette detection switches are in the operating state, a cassette mounting device having a control circuit for identifying which cassette is loaded .