JPS61160873A - Magnetic disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To perform the smooth ejecting action of a magnetic disk cartridge simultaneously with the positioning action of said cartridge, by securing such a structure where the stopper surface of the stopper pawl part of a loading device always has a contact with the upper edge of a positioning hole for the cartridge. CONSTITUTION:A stopper 17 is attached to a holder 12 for a magnetic disk cartridge 2 and pressed by a plate spring 13. The stopper 17 contains a folded part 17a interlocking the open cam part 4b of a cam 4, a stopper pawl part 17b entering the positioning hole 2a of the cartridge 2 and an auxiliary pawl part 17c with its bottom surface set higher by an amount equal to the plate thickness so that the part 17c is set a level equal to the part 17b. When the cartridge 2 is loaded toward an arrow head (a), the drop amount of the cartridge 2 is controlled by the part 17c. Then the cartridge 2 interlocks the hole 2a at the read end of this hole and at a relative position where the upper surface of the part 17b is set at the same level as the surface of the cartridge 2. Thus the cartridge 2 is positioned. Thus it is possible to perform a smooth ejecting action simultaneously with the positioning action of the cartridge 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic disk recording/reproducing device used in various OA type equipment.

(Conventional structure and its problems) In recent years, magnetic disk recording and reproducing devices have rapidly progressed as easy-to-handle, highly reliable, and inexpensive random access memory, with the field of application expanding to office automation equipment such as personal computers. are doing.

A conventional general magnetic disk recording/reproducing device will be explained with reference to FIGS. 1 to 3.

FIG. 1 is a perspective view showing the inside of a conventional magnetic disk recording/reproducing device. A magnetic disk 1 for recording and reproducing information is
Magnetic disk cartridge 2 that rotatably supports this
The device is housed in the device and is attached to the recording/reproducing position of the main body of the device by a loading device comprising a chassis 3, a cam plate 4, and a stopper 5.

A rotary drive device 6 that rotates the magnetic disk 1 is driven by an electric motor 8 via a belt 7.

The magnetic head 9 arranged so as to be in contact with the surface of the magnetic disk 1 described above is driven in the radial direction of the magnetic disk 1 by a magnetic head feeding device 10 .

A control circuit section 11 that controls the movements of the magnetic disk rotation drive device 6 and the magnetic head feeding device 10 described above, as well as the recording and reproducing of the magnetic disk 1 by the magnetic head 9, is mounted on the bottom of the main body of the device.

The operation of the magnetic disk recording/reproducing apparatus configured as above will be explained.

First, the magnetic disk cartridge 2 is attached to the recording/reproducing position of the main body of the apparatus by a loading device, and at the same time the magnetic disk 1 is rotated by the magnetic disk rotation drive device 6, the magnetic head feeding device 10 operates to move the magnetic head 9. It is moved in the radial direction and remains stationary at a predetermined relative position for recording on or taking out recordings from the magnetic disk 1.

Next, an electric signal from the control circuit section 11 causes the magnetic head 9 to
Information is recorded on or reproduced from the magnetic disk 1 through the magnetic disk 1.

FIGS. 2 and 3 are an enlarged perspective view of a magnetic disk recording and reproducing device showing a conventional loading device, respectively. FIG. 2 is viewed from the opposite direction to FIG. Each figure shows the state viewed from the same direction.

The loading device includes a holder 12 that stores the magnetic disk cartridge 2, a stopper 5 that is pivoted to the holder 12 and is biased by a leaf spring 13 on the upper surface of the left rear thereof, and a stopper 5 that is provided front and rear on both left and right sides. 2
The cam roller 14 of the book and the above cam roller 1 formed on the upper edge of the chassis 3 on both the left and right sides attached to the main body of the device
4 and two guide protrusions 15 each having a guide groove 15a that engages with the guide grooves 15a.

Two cam plates 4 and 16 are provided on both the left and right sides of the chassis 3, respectively, which can slide forward and backward. Note that the front cam plate 16 has only a groove-shaped cam portion 16a that engages with the cam roller 14, and the rear cam plate 4 has a groove that engages with the cam roller 14, which has the same shape as the groove-shaped cam portion 16a of the front cam plate 16. A cam portion 4a and an open cam portion 4b with which the bent portion 5a of the stopper 5 engages are formed.

Further, the angle of inclination of the open cam portion 4b is set smaller than the angle of inclination of the grooved cam portions 4a and 16a.

Further, the stopper 5 is formed with a stopper claw portion 5b that falls into a positioning hole 2a formed on the surface of the magnetic disk cartridge 2.

The operation of the loading device having such a configuration will be explained. In FIG. 3, when the magnetic disk cartridge 2 is inserted in the direction of arrow a, the stopper claw portion 5b enters the positioning hole 2a of the magnetic disk cartridge 2 by the action of the leaf spring 13, and the spring ( (not shown) in the direction of the arrow A, and is positioned between the inner wall surface of the rear end of the positioning hole 2a.

To eject the magnetic disk cartridge 2, press the cam plate 4.
and 16 (16 is not drawn in FIG. 3) are simultaneously moved in the direction of arrow a, the cam rollers 14 at two locations on each side of the holder 12 are moved to the groove-shaped cam portions 4a and 16.
a (16a is not shown in FIG. 3) and is guided by both the guide groove 15a of the chassis 3 and floats directly upward. At the same time, the bent portion 5a of the stopper 5
It is lifted from the surface of the holder 12 by being guided by the inclined surface of the open cam part 4b, which has a larger angle of inclination than the grooved cam part 4a. The claw portion 5b of the stopper 5 inserted into the positioning hole 2a of the magnetic disk cartridge 2 comes off because the tip of the stopper 5 is lifted, and the magnetic disk cartridge 2 moves in the direction of the arrow by the action of a built-in spring (not shown). The magnetic disk cartridge 2 is ejected from the apparatus.

However, in the above configuration, the claw portion 5b of the stopper 5 and the positioning hole 2 of the magnetic disk cartridge 2
In order to ensure sufficient margin for engagement with the stopper claw portion 5b, the stopper claw portion 5b is inserted into the plate more than the thickness of the stopper claw portion 5b.

If the inner wall of the positioning hole 2a is damaged, or if the inner wall of the cartridge 2 is made of resin and has shrinkage due to shrinkage during molding, the claw portion 5b will dig into the shrinkage and the stopper 5 will not rise, preventing the magnetic disk cartridge. There was a problem that 2 was no longer discharged.

(Objective of the Invention) The present invention solves the above-mentioned drawbacks, and aims to provide a magnetic disk recording and reproducing device in which the magnetic disk cartridge can be smoothly ejected regardless of the shape and condition of the inner wall of the positioning hole of the magnetic disk cartridge. It is something.

(Structure of the Invention) In order to achieve the above object, in the present invention, a part of the stopper surface at the tip of the claw part of the stopper provided on the holder of the loading device is always located at the upper edge of the positioning hole of the magnetic disk cartridge. By making contact with the magnetic disk cartridge, the magnetic disk cartridge is positioned at the recording/reproducing position of the magnetic disk recording/reproducing device, and at the same time, it is intended to be smoothly ejected regardless of the shape or condition of the inner wall of the positioning hole. be.

(Description of Embodiments) Two embodiments of the present invention will be described with reference to FIGS. 4 and 5.

FIG. 4 is an enlarged perspective view of a part of the stopper of the loading device showing the first embodiment of the present invention, and the structure of the loading device other than the stopper 17 according to the present invention is the same as that of the conventional example shown in FIG. 3. . The stopper 17 includes a bent portion 17a having the same shape as the conventional example that engages with the open cam portion 4b of the cam plate 4, and a stopper claw portion 17b that fits into the positioning hole 2a of the magnetic disk cartridge 2 and also has the same shape as the conventional example. In addition, an auxiliary pawl 17c is formed so as to be lined up with this, and whose bottom surface is made higher by the thickness of the plate.

The operation of the loading device provided with such a stopper 17 will be explained. In FIG. 4, when the magnetic disk cartridge 2 is inserted in the direction of arrow a, the stopper claw portion 17b enters the positioning hole 2a of the magnetic disk cartridge 2 by the action of the leaf spring 13, but the amount of fall is limited by the auxiliary claw 17c. and the stopper claw portion 17b
At the position where the magnetic disk cartridge 2 is inserted by the thickness of the plate, a spring (not shown) built into the magnetic disk cartridge 2 pushes it back in the direction of the arrow, and the upper surface of the stopper claw portion 17b is at the rear end of the positioning hole 2a. It is positioned by engaging with the surface of the magnetic disk cartridge 2 at a relative position that forms one plane.

The magnetic disk cartridge 2 is ejected using the same procedure as in the conventional example, but according to the stopper 17 of the present invention, even if the inner wall surface of the positioning hole 2a has scratches during molding or during use, it can be ejected. Since the stopper claw portion 17b does not fall into the positioning hole 2a beyond its plate thickness, it can be smoothly removed from the positioning hole 2a, so that the magnetic disk cartridge 2 can be ejected smoothly and reliably.

Although the auxiliary pawls 17c are arranged side by side in the stopper pawl portion 17b in the above embodiment, the positions do not matter if there is a step equal to the thickness of the plate.

FIG. 5 is an enlarged perspective view of a portion of a stopper of a loading device showing a second embodiment of the present invention, and the structure of the loading device other than the stopper 18 of the present invention is the same as that of FIG. 3 of the conventional example. . The stopper 18 includes a bent portion 18a having the same shape as the conventional example that engages with the open cam portion 4b of the cam plate 4, and a hook-shaped stopper claw portion 18b bent into two stages that fits into the positioning hole 2a of the magnetic disk cartridge 2. is formed. The hook-shaped stopper claw portion 18b is.

In contrast to the prior art and the first embodiment in which the cut surface was used as a stopper surface, the surface is used as a stopper surface and the contact surface is widened.

The operation of the loading device provided with such a stopper 18 will be explained. In FIG. 5, when the magnetic disk cartridge 2 is inserted in the direction of arrow a, the hook-shaped stopper claw portion 18b enters the positioning hole 2a of the magnetic disk cartridge 2 by the action of the leaf spring 13, and the hook-shaped stopper claw portion 18b is inserted into the magnetic disk cartridge 2. It is pushed back in the direction of the arrow by a spring (not shown) and is positioned at the rear end of the positioning hole 2a. At this time, the flat end portion of the hook-shaped stopper claw portion 18b engages with the surface of the magnetic disk cartridge 2 with the end thereof slightly protruding from the surface of the magnetic disk cartridge 2.

Ejection of the magnetic disk cartridge 2 is carried out in the same manner as in the conventional example, but according to the stopper 18 of the present invention, it is carried out smoothly and reliably, regardless of the shape and condition of the positioning hole 2a, as in the first embodiment. .

(Effects of the Invention) According to the present invention, it is possible to eject the magnetic disk cartridge smoothly and reliably regardless of the shape and condition of the positioning hole of the magnetic disk cartridge, and it has excellent operability and high reliability. A magnetic disk recording/reproducing device can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a cross section of a conventional magnetic disk recording/reproducing device, Fig. 2 is a perspective view showing a loading device seen from the opposite direction to Fig. 1, and Figs. 3 to 5 show a stopper of the loading device. FIG. 3 shows a conventional example, and FIGS. 4 and 5 show examples of the present invention. DESCRIPTION OF SYMBOLS 1... Magnetic disk, 2... Magnetic disk cartridge, 2a... Positioning hole, 3... Chassis, 4,
16...Cam plate, 4a, 16a...Groove cam part, 4b...Open cam part, 5.17.18...Stopper, 5a, 17a, 18a...Bending part, 5b, 17b...Stopper claw portion, 6...Magnetic disk rotation drive device, 7...Belt, 8...Electric motor, 9...Magnetic head, 10...Magnetic head feeding device, 11...・Control circuit section, 12...Holder, 13
... Temporary spring, 14... Cam roller, 15... Guide projection, 15a... Guide groove, 17c... Auxiliary claw, 1
8b...Hook-shaped stopper claw part. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A loading device that attaches a magnetic disk cartridge that rotatably supports a magnetic disk to a recording/reproducing position, a magnetic disk rotation drive device that rotates the magnetic disk in the recording/reproducing position, and a recording surface of the magnetic disk. In a magnetic disk recording and reproducing device that includes a magnetic head in contact with the magnetic head, a magnetic head feeding device that moves the magnetic head in the radial direction of the magnetic disk, and a control circuit that controls the various devices described above, positioning of the magnetic disk cartridge is performed. A magnetic disk recording characterized in that a stopper surface of a claw portion of a stopper of the loading device that engages with the hole, positions the recording/reproducing position, and maintains the position is always in contact with the upper edge of the positioning hole. playback device.