JPS63140449A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent the loading defect to the driving shaft of a cassette hub by abutting a pressure means to a locking means with the opening and closing mechanism of a cover, pressuring the hub, interlocking to the locking motion of the locking means and releasing the pressure. CONSTITUTION:The device is equipped with a cassette holder 24, a cover 22 to cover the cassette holder 24 of a loading position at the closed position while it is turned between an opened position and a closed position to a main body 21, a pressuring means 101 to pressure and insert a hub 2 of a recording medium cassette 5 to a driving shaft 26a by the motion from the opened position of the cover 22 to the closed position and release the pressure force at the closed position and a locking means 102 to lock the cover 22 to the device main body 21 in the closed position. The pressuring means 101 is respectively interlocked to the opening closing motion of the cover 22 and the locking motion to lock the cover 22 with the locking means 102, the pressuring means 101(47b) is abutted to the locking means 102(30c) by the opening closing motion of the cover 22, the hub 2 is pressured, interlocked to the locking motion of the locking means 102 and the pressure is released.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a mounting device for a cassette, such as a magnetic sheet cassette, in which a rotating recording medium is housed.

B. Prior Art Still images are recorded by forming concentric tracks on a small magnetic disk. A recording and reproducing system using a so-called "still video floppy" as a medium has been developed. FIG. 3 shows a still video floppy 5 of this type. A hub 2 is fixed to the center of the magnetic disk 1, and a substantially pentagonal hole 3 is formed in the center of the hub 2, into which a spindle shaft of a spindle motor for rotating the disk is inserted. A spring portion 4 is formed in the hub 2 adjacent to the hole 3, and a driving spindle shaft (not shown) inserted through the hole 3 is pressed against a 7-shaped inclined surface 3a formed on the side opposite to the spring portion 4. Thereby, the rotation center of the spindle shaft and the rotation center of the magnetic disk 1 are positioned with high precision. Therefore, in order to attach the still video frame 5 to the spindle shaft, the spindle shaft must be forced into the hub hole 3 against the frictional force generated between the hub 2 and the spindle shaft by the pressing force of the spring portion 4. A suppression mechanism is required to be inserted. In addition, in Figure 3,
5a and 5b are holes for positioning the cassette.

The conventional device will be explained below with reference to FIGS. 5 to 7.

Figures 5 to 7 are previously filed by the applicant in patent application No. 1983-198.
753 is a cross-sectional view of the cassette mounting device proposed in the specification of No. 753; FIG. Note that in the following description, the still video floppy will be referred to as a cassette.

In this cassette loading device, as shown in FIGS. 5 to 7, the hub 2 of the cassette 5 is pressed by the suppressing member 7 while the cassette lid 6 is being closed (FIG. 5), and the spindle shaft 1 is
Attach the hub 2 to the cassette M6 as shown in Figure 6.
When completely closed, this pressing member 7 is retracted from the hub 2. That is, the pressing member 7 is fixed to the pressing substrate 11,
As shown in FIG. 5, in the process of closing the cassette lid 6, the plate spring 12 presses the suppression board 11 toward the spindle shaft lo, thereby inserting the hub 2 into the spindle shaft 10 under pressure. Further, a seesaw lever 14 is attached to the upper surface of the cassette holder 13 that accommodates the cassette 5, and a sixth
As shown in the figure, when the cassette M6 is completely closed, one end 14a of the seesaw lever 14 is pushed down by the cassette lid 6, the other end 14b pushes up the tip 11a of the pressing board 11, and the pressing member 7 is retracted from the hub 2. .

C0 Problem to be Solved by the Invention However, if the positioning pins 15a and 15b are not inserted correctly into the positioning holes 5a and 5b of the cassette 5 as shown in FIG. 7 while the cassette lid 6 is being closed, the positioning of the cassette 5 is Hole 5a.

The resistance force of the positioning pins 15a and 15b entering 5b is large, and the pressing board 11 is pushed up by the seesaw lever 14 before the hub 2 is inserted into the spindle shaft 10, causing the cassette lid 6 to close while the cassette is not properly installed. There was a problem with this.

Further, as shown in FIG. 6, when the cassette 5 is correctly attached to the spindle shaft 10, the pressing force of the leaf spring 12 is always applied to the pressing board 11, and the pressing force causes the pressing board 11 and the seesaw lever 14 to move. There was also a problem that the pressing member 7 and the hub 2 came into contact with each other due to the bending, resulting in a rotational load on the spindle shaft 10. In addition, in FIGS. 5 to 7, 8 is the rotation axis of the cassette holder 13.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette mounting device in which there is no mounting failure and the pressing force does not become a rotational load on the drive shaft.

The present invention will be explained with reference to FIGS. 1(a) to 1(c) showing an embodiment of a means for solving the D0 problem. The cassette loading device according to the present invention accommodates a recording medium cassette 5 and a main body 21 of the device. A cassette holder 24 that rotates between an attachment/detachment position and an attachment position with respect to the main body 21, and a lid that rotates between an open position and a closed position with respect to the main body 21 and covers the cassette holder 24 in the attachment position in the closed position. 22, a pressing means 101 that presses and inserts the hub 2 of the recording medium cassette 5 onto the drive shaft 26a by movement of the lid 22 from the open position to the closed position, and releases the pressing force in the closed position; and a locking means 102 for locking the device to the device main body 21. The above-mentioned problem is solved when the pressing means 101 is
The opening/closing movement of the lid 22 and the locking movement of the locking means 102 to lock the lid 22 are linked respectively, and the opening/closing movement of the lid 22 causes the pressing means 101 (47b) to press the locking means 102 (30).
c), the hub 2 is pressed against the hub 2, and the pressure is released in conjunction with the locking movement of the locking means 102.

When the 80 action cassette 5 is accommodated in the cassette holder 24 and the lid 22 is closed, the pressing means 101 (47b) engages the locking means 102.
(30c), the hub 2 is pressed and inserted into the drive shaft 26a (see FIG. 1(b)).

When the lid 22 is locked by the locking means 102, the pressing of the hub 2 by the pressing means 101 (44) is released in conjunction with the locking movement, and a gap between the pressing means 101 (44) and the hub 2 is released. The void 50 is reliably formed (see Figure 1 CQ))
.

F. Example One embodiment will be described with reference to FIGS. 1 to 4.

In FIG. 2, in which the upper surface of the cassette lid is removed to show the inside of the cassette loading device, and in FIG. is a board of the main body of the apparatus, and a cassette lid 22 is rotatably supported on the ear portion 21a of the board. Main board 2
A cassette holder 24 is rotatably supported on a shaft 23 supported by the cassette holder 1 . When the cassette 5 is loaded into the cassette holder 24 and the cassette lid 22 is closed, the cassette holder 24 also rotates about the shaft 23 as a fulcrum. A spindle motor 26 is installed in the center of the main body board 21, and around it are positioning holes 5a and 5b drilled in the cassette 5.
(See Fig. 3) Positioning pins 21b, 2
1a is erected.

FIG. 4(a) is a sectional view taken along line bb in FIG. 2.

Further explanation will be given with reference to FIG. 2. As shown in FIG. 2, a slide board 27 is attached to the main board 21, and holes X 28 a are formed in the elongated holes 27a and 27b.

A slide knob 29 is attached by fitting 28b. A slide locking member 30 (
2) is fixed and slides integrally with the slide knob 29 with respect to the slide board 27 in the directions of arrows A and B. Reference numeral 31 denotes a locking lever provided to urge the slide locking member 30 in six directions, and the locking lever 31
The spring 32 is tensioned between the spring hook part 31a and the spring hook part 30a of the slide locking member 3o, and the slide locking member 30 is biased in six directions. At the same time, the locking lever 31 is urged clockwise. The fourth cassette lid 22 is open (open position).
In the state shown in Figure (a), the claw 30b of the slide locking member 3o
engages with the stepped portion 31b of the locking lever 31, and the A direction biasing force is locked, and the counterclockwise biasing force of the locking lever 31 is also locked. When the cassette lid 22 is completely closed (closed position) as shown in FIG. The engagement with the claw 30b is released,
Since the locking member 33 faces the notch of the striker portion 30c of the slide locking member 30, the force of the spring 32 engages the two. This is the locked state of the cassette lid 22.

Further, referring to FIG. 1(a), FIG. 2, and FIG. 4(a), the pressing board 41 is supported by the shaft 23.

The tip 41a extends above the spindle shaft 26a. A leaf spring 43 is attached to the tip 41a by a pin 42, and a back surface 43a of the leaf spring 43 faces the cassette hub 2, and a pressing pin 44 is fixed thereto. This suppression board 41 is biased in a direction away from the cassette holder 24 by a weak leaf spring 45 provided on the upper surface of the cassette holder 24 . Further, a seesaw lever 47 is swingably provided on the back surface of the cassette lid 22 by means of a pin 46, and its inner end 47a is attached to the tip end 47 of the pressing board 41.
a, and its outer end 47b extends close to the folded wall 22a of the cassette lid 22. Due to the closing operation of the cassette lid 22, the outer end 47b of the seesaw lever 47
Moving downward from the state shown in Fig. 4(a), the state shown in Fig. 1(b)
), the inner end 47 a presses the tip 41 a of the pressing board 41 against the spring force of the leaf spring 45 . When the cassette lid 22 is completely closed, when the striker 30c moves in six directions,
The outer end 47b of the seesaw lever 47 is shown in FIG.
As shown in FIG. 4(b), the spring force of the plate spring 45 causes the striker part 30c to escape downward along the slope 30e, so that the pressing force on the pressing board tip 41a by the inner end 47a of the seesaw lever 47 is released. Ru. In addition, Fig. 1(a)
2, 46a is a pin head which prevents the seesaw lever 47 from being pulled out, 48 is a rotation prevention pin of the seesaw lever 47, and 49 is a long hole of the seesaw lever 47 into which the pin 46 is inserted.

In the embodiment with the above configuration, the pressing board 41, the pressing pin 44, and the seesaw lever 47 control the pressing means 101, the locking member 32, the slide locking member 30, and the locking lever 31.
, and springs 32 constitute locking means 102, respectively.

Next, the operation of the embodiment will be explained with reference to FIGS. 1(b) and 1(c). In addition, Fig. 1 (b) and (c) are shown in Fig. 1 (
The same cross section as a) is shown, (b) shows the cassette hub being pressed toward the spindle shaft just before the cassette lid is completely closed, and (c) shows the cassette hub being pressed toward the spindle shaft with the cassette lid completely closed. Indicates the state in which the pressing force acting on is released.

(1) Opening operation of the cassette lid In the state shown in FIG. 4(b), when the slide knob 29 is operated in the direction B against the force of the spring 32, the slide locking member 30 moves in the direction B. When the engagement between the striker portion 30c and the tip portion 33a of the locking member 33 is released, the cassette lid 22 is opened by a cassette lid opening spring (not shown). When the slide knob 29 is released in this state, the claw portion 30b of the slide locking member 3o, which is urged in the input direction by the spring force of the spring 32, moves the second locking lever 31 as shown in FIG. 4(a). The slide locking member 3 engages with the stepped portion 31b.
The biasing force of o and the rotational biasing force of the locking lever 31 are locked. Then, as shown in FIG. 1(a), the cassette lid 22
is fully opened, and the cassette 5 inside the cassette holder 24, which has been set to the detachment position, is taken out.

(II) Attaching the cassette In the state shown in Figure 1 (a), place the cassette 5 into the cassette holder 2.
Accommodate in 4. When the cassette lid 22 is rotated in the closing direction, the cassette holder 24 is also rotated in the same direction. During the rotational movement, as shown in FIG. 1(b), the outer end 47b of the seesaw lever 47
When sealed to L, the seesaw lever 47 is attached to the pin 46.
The tip portion 41 of the suppression board 41 swings counterclockwise using the plate spring 45 as a fulcrum, and the inner end 47a of the plate spring 45 resists the spring force of the plate spring 45.
Press a. As a result, the suppression pin 44 presses the cassette hub 2, and the cassette 5 is mounted on the spindle shaft 26a.

When the cassette lid 22 is further rotated to close, the lower surface 33b of the locking member 33 presses the bent portion 31c of the locking lever 31 downward, and the locking lever 31 moves counterclockwise against the spring force of the spring 32. Rotate.

This rotation disengages the claw portion 30b of the slide locking member 30 and the stepped portion 30b of the locking lever 31, and the slide locking member 30 becomes able to slide in the direction of the arrow by the spring force of the spring 32. . When the cassette M22 is further closed, the tip 33a of the locking member 33 engages the striker portion 30c.
facing the notch, the slide locking member 30 slides in the direction of arrow A, resulting in the state shown in FIG. 4(b). As a result,
The striker portion 30c and the locking member 33 engage to lock the cassette lid 22.

As the slide locking member 30 slides in the entry direction, the outer end 47b of the seesaw lever 47, which has been suppressed by the upper surface 30d of the striker part 30c, descends the slope 30e of the striker part 30c due to the spring force of the leaf spring 45, and the seesaw The lever 47 swings clockwise about its fulcrum 46, and the tip 41 of the suppression board 41 along with the inner end 47a
a moves toward the cassette lid 22. Due to this.

The suppressing pin 44 is separated from the cassette hub 2, and a gap 50 (see FIG. 1 (Q)) is formed between them, so that no rotational load is applied to the spindle shaft 26a.

The position of the cassette holder 24 at this time is the mounting position.

In the above embodiment, after the seesaw lever 47 reliably presses the tip 41a of the pressing board 41 in the process of closing the cassette lid 22, the slide locking member 30 slides to the lock position to suppress the seesaw lever 47. Since it is released, there is no risk that the hub 2 will be incompletely attached to the drive shaft 26a. The amount by which the hub 2 is pushed by the suppression pin 44 is the height of the upper surface 30d of the striker 30c.

This is determined by the lever ratio of the seesaw lever 47 and the height of the cassette I-M 22, and the pushing amount of the hub 2 is always constant, so that the cassette 5 is not installed incorrectly.

Furthermore, when the cassette lid 22 is completely closed, the pressing board 41 is pressed against the back side of the cassette lid 22 by the urging force of the spring 45, but the spring force of the spring 45 is sufficient to overcome the weight of the pressing board 41. Because of the weak ability of the pressing board 4
There is no force acting on 1 that would cause it to deform. Furthermore, since almost no force acts on the seesaw lever 47, there is no risk that the suppressing pin 44 will come into contact with the hub 2 due to deformation of the suppressing board 41 and seesaw lever 47, and no rotational load will be applied to the spindle motor 26. Therefore, according to this embodiment, desired recording and reproduction is reliably performed.

G8 Effects of the Invention The present invention allows the pressing means to be linked to the opening/closing movement of the lid and the locking movement of the locking means to lock the lid, so that the opening/closing movement of the lid causes the pressing means to come into contact with the locking means to lock the hub. Since the pressure is released in conjunction with the locking movement of the locking means, it is possible to prevent incorrect installation of the cassette hub onto the drive shaft, and to ensure that the pressing means is separated from the hub during installation. Undesired rotational loads due to hub suppression are also prevented.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, and FIG.
) to (c) are cross-sectional views taken along the line a-a in FIG. It shows a state in which it is pressed toward the shaft, and (c) shows a state in which the cassette lid is completely closed and the pressing force acting on the cassette hub is released. Fig. 2 is a plan view showing the inside of the cassette mounting device with the top surface of the cassette lid removed, Fig. 3 is a plan view showing an example of the cassette, and Figs. 4 (a) and (b).
2 shows a cross-sectional view taken along the line b-b of FIG. 7 to 7 are sectional views each illustrating the operation of the conventional example. 1°: Magnetic disk 5: Cassette 21: Main body board 22: Cassette lid 24: Cassette holder 26: Spindle motor 26a Nispindle shaft 29 Nislide knob 3o Nislide locking member 30C Nistriker 31: Locking lever 32: Spring 33: Locking member 41: Pressing base plate 41a: Tip portion 44: Pressing pin 47: Seesaw lever 47a: Inner end 47b = Outer end 1o1: Pressing means 1o2: Locking means Patent applicant
Nippon Kogaku Kogyo Co., Ltd. Representative Patent Attorney Fuyuki Nagai 21st XJ! Figure 3 (] β□ □A Figure 4 Figure 5 Figure 6 Early δ Cylinder 7 Figure

Claims (1)

[Claims] A cassette holder that accommodates a recording medium cassette and rotates between an attachment position and an attachment position with respect to the apparatus main body, and a cassette holder that rotates between an open position and a closed position with respect to the apparatus body. A lid that covers the cassette holder at the mounting position in the closed position, and a pressing force that presses and inserts the hub of the recording medium cassette into the drive shaft by movement of the lid from the open position to the closed position, and releases the pressing force in the closed position. and a locking means for locking the lid to the device main body in the closed position, wherein the pressing means controls the opening/closing movement of the lid and the locking means for locking the lid. The pressing means contacts the locking means and presses the hub due to the opening/closing movement of the lid, and is configured such that the pressing means is released in conjunction with the locking movement of the locking means. A cassette loading device characterized by: