JPH0482046A - Turning device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotation device used in a cassette loading device such as a video floppy drive device.

2. Description of the Related Art In recent years, with the diversification of recording media, floppy disks housed in small hard cases have come to be used for recording video, audio, and digital data. Hereinafter, it will be commonly referred to as a video floppy cassette.

FIG. 4 shows a plan view of a video floppy cassette, and FIGS. 5 to 7 show a rotating device used in a conventional cassette loading device of a video floppy drive. As shown in Figure 4, the cassette 1 has a center core 2.
A magnetic sheet 3 with a magnetic sheet 3 arranged in the center is rotatably built-in. Holes 4 and 5 provided in the cassette 1 are positioning holes provided for positioning when installing the cassette into a video floppy drive device. Reference numeral 7 denotes a movable shutter, which moves to 7' when the cassette 1 is attached, so that windows 8 into which the head is inserted appear on both sides of the cassette 1.

Now, as shown in FIGS. 5 to 7, a shaft 10 is supported by a shaft support plate 16 located at the rear end of the chassis 9, and an outer frame 11. The rear portions of the inner frames 12 are rotatably supported by shafts 10, respectively. The shaft 10 is held by an E-ring 17.17a so as not to come off. Further, the inner frame 12 is raised along with the outer frame 11 by a mechanism not shown. Further, on the chassis 9 side, positioning pins 13 and 14 are fixed, and a spindle 15 is provided in the center, each of which is inserted into the cassette 1. Therefore, the cassette 1 is inserted into the inner frame 12. When inserting or removing the
The outer frame 11 and the inner frame 12 are thick (held in an open state) as shown in FIG. This state is shown in FIG. 6, and FIG. 7 is a view from above.

In the state shown in FIG. 6, the positioning pins 13 and 14 are fitted into the positioning holes 4.5 of the J set, respectively, and the center core 2 is also engaged with the spindle 15 to complete loading.

Problems to be Solved by the Invention In the conventional rotating device described above, when the cassette 1 is inserted into or removed from the inner frame 12 (in the wide open state as shown in FIG. 5), the positioning pins 13 and 14 are used to position the cassette 1. It is necessary to completely remove it from the hole 5.4, but for this reason, in such a conventional rotation device, the position of the shaft 10, which is the fulcrum of rotation, is at a position away from the positioning pin 14. must be placed. That is, since it is necessary to provide a sufficient distance as shown in FIG. 7, the device becomes larger than necessary, which is a major obstacle in realizing a small cassette-sized video floppy drive device. For this purpose, a loading method using a link mechanism may be considered, but this is not a good idea because the mechanism becomes complicated and the number of parts increases, leading to increased costs and the occurrence of defects.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a rotating device that can reduce the size of a cassette in a cassette loading device of a video floppy drive device at low cost.

Means for Solving Problems In order to achieve the above object, the present invention does not provide a fulcrum at the center of rotation, but instead provides at least two concentric elongated holes or elongated holes centered on a virtual rotation axis, and a It has a configuration in which the rotational movement is guided by a pin that engages with each of the holes or elongated holes.

Effect of the present invention With the above-described configuration, the rotating body is rotated while being guided by two concentric elongated holes (or elongated holes).

The center of rotation is the center of curvature of the concentric elongated hole, but there is no fulcrum at that center like in the past, and it is a virtual center, so we want to increase the radius of curvature of the elongated hole (or elongated hole). Even in this case, it can be realized without increasing the size of the rotation device.

Embodiment Hereinafter, a rotating device according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 3, taking as an example a cassette loading device of a video floppy drive using this device.

The chassis body 20 is provided with positioning pins 21 and 22 for positioning the cassette 1 and a spindle 23 that engages with the center core 2 to rotate the magnetic sheet 3, as well as pin fixing plates 24 and 24'' (hereinafter referred to as Items with the same name on the side that cannot be seen in Figures 1 and 2 are shown with a “” attached.
5, 26° 25", 26° (25', 26' are not shown). Pin fixing plate 24
A first pin 27.27' and a second pin 28.2s' are provided at 24°. The outer frame 29 has a first elongated hole (or elongated hole, a hole is a through hole, a hole is a hole with a bottom, hereinafter referred to as an elongated hole) 30.30' and a second elongated hole 31.3.
1', the first and second elongated holes 30.3
0", 31.31' are concentric elongated holes centered on the axis P (virtual center), and the tenth elongated holes 30, 30' are connected to the first pin 27.27' and the second pin 27.27'. The elongated holes 31 and 31' are engaged with and held by the second pins 28 and 28', respectively.In other words, the outer frame 29 can rotate around the axis P. The frame 29 has a support shaft 34 that serves as a rotation support shaft for the inner frame 35, a bent portion 32 for hooking and lifting the inner frame 35, and a spring 36. 36' is provided, and the outer frame 29 is urged in a direction away from the chassis main body 20. 33 is a holding part when pushing down the outer frame 29 by hand against the spring 36.

Next, the operation of the rotating device configured as described above will be explained below. FIG. inserted. At this time, the inner frame 35 is supported by a support shaft 34 and a bent portion 32 provided on the outer frame 29. From this state, when the presser part 33 is manually pushed in the direction of the arrow F, the outer frame 29 will open the first elongated holes 30, 30', the first pins 27, 27', and the second elongated hole 31°. 31' and the second pin 28, 28', it rotates about the axis P and approaches the chassis body (at this time, the pins in the long holes 31 and 31 in Figure 1 2B, 26"
The center where is located and the elongated holes 30, 30 in Fig. 2
Since the distance between the centers of the pins 27 and 27' is longer than the distance between the centers of the pins 27 and 28, the side wall of the elongated hole 31 and 31' has an axis as it rotates. An outward force is applied from P, and a component of that force causes the axis 28.28
' is pushed to the position shown in FIG. 2 within the elongated holes 31, 31' and becomes stable. In addition, the inner frame 35 approaches the chassis body 20 in accordance with the rotation of the outer frame 29, and the positioning holes (5, 4) of the cassette 1 in the inner frame 35 are aligned with the positioning pins 21 and 22, respectively, and the center core 2 engages with the spindle 23, and the loading of the cassette 1 is completed. FIG. 2 shows the state in which the outer frame 29 has been pushed. In this state, the outer frame 29 is held by the holding means (
(not shown). FIG. 3 is a top view of this state.

Next, when you want to take out the cassette 1, when you release the holding means (not shown) of the outer frame 29, the spring 36
Due to the force, the outer frame 29 moves away from the chassis body 20 while rotating in a direction opposite to the front end. Inner frame 35 is also outer frame 2
The cassette 1 inside the inner frame 35 is separated from the positioning pins 21.22 and the spindle 23. In the state shown in FIG. 1, it is sufficient to pull out the cassette l in the direction opposite to the arrow E.

In the rotational movement of the outer frame 29 performed for loading or unloading the cassette described above, the rotational center axis P is aligned with the right positioning pin 22.22' in FIGS. 1 and 2.
Since the position is sufficiently far away, the cassette 1 can rotate between a position where it engages with the positioning pin 22 and a position where it is sufficiently separated. In the past, an actual axis was required at the position of this rotation center axis, which resulted in a larger device or the rotation angle of the outer frame had to be made thicker. With this configuration, this is not necessary, and the device can be made much smaller.
Furthermore, the configuration itself is very simple and can be realized at low cost.

Note that the point of emphasis on the outer frame 29 is the elongated hole 30 (30')
If it is set midway between the long hole 31 (31") and the long hole 31 (31"), it will rotate smoothly, but it is not desirable to set the point of force outside the long hole.

In this embodiment, a concentric elongated hole is provided on the outer frame 29 side, and a pin is provided on the pin fixing plate 24.24° side. It goes without saying that a concentric long hole may be provided instead of a pin on the . It goes without saying that a second pin may be provided, and the first pin and second elongated hole may be provided on the pin fixing plate side.

In addition, although this embodiment has been described as having a configuration with a double rotating frame body of an outer frame and an inner frame, there is no outer frame and only an inner frame,
It goes without saying that the inner frame and the pin fixing plate may be connected by a concentric elongated hole and a pin that engages with the elongated hole.

Also, as explained in the example of video floppy cassettes, this rotating device is also used for audio compact cassettes and digital audio tape cassettes.

Needless to say, it can also be applied to video cassette tapes, etc.

Effects of the Invention As is clear from the above explanation, when the rotating device according to the present invention is used in a cassette loading device of a video floppy drive device, the outer frame (or inner frame) rotates around the virtual rotation axis, so that the mechanism It is possible to reduce the size of the device, realize a cassette-sized mechanism, and does not require a complicated structure like a device using a link mechanism, which has great effects.

[Brief explanation of the drawing]

1 and 2 are detailed views showing the structure and operation of a cassette loading device for a video floppy drive using a rotating device according to an embodiment of the present invention, FIG. 3 is a plan view thereof, and FIG. 5 is a plan view of a video floppy cassette used in the same device, FIGS. 5 and 6 are side views showing the configuration and operation of a cassette loading device for a video floppy drive using a conventional rotating device, and FIG. FIG. 1...Cassette, 20...Chassis body, 21゜22...Positioning pin, 23...
...Spindle, 24...Pin fixing plate, 27.27'...First pin, 28,28"
...Second pin, 29...Outer frame, 30
．． 30'...First long hole, 31.31'...
...Second long hole, 34...Spindle, 35...
···The inner frame. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (4)

[Claims] (1) Rotation is performed without a fulcrum at the center of rotation, with at least two concentric elongated holes or elongated holes centered around an imaginary rotation axis, and a pin that engages with each of the elongated holes or elongated holes. A rotating device configured to guide motion. (2) The rotating device according to claim 1, wherein a pin is provided on the chassis body side and an elongated hole or a long hole is provided on the rotating frame side. (3) The rotating device according to claim 1, further comprising an elongated hole or a long hole on the chassis body side and a pin on the rotating frame side. (4) The rotating device according to claim 1, wherein the elongated hole or the elongated hole and the pin are arbitrarily arranged on the chassis body side and the rotating frame side so as to be compatible with each other.