JPH043587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic disk device, and more particularly to an operating mechanism for coupling a spindle and a clamper that clamp and rotate a magnetic disk and for releasing this coupling. .

[Technical background of the invention and its problems] In a floppy disk device, a disk is held between a spindle that is rotationally driven by a motor and a clamper that approaches and separates from the spindle. Some devices move the clamper using a freely movable operating arm to move the clamper toward and away from the spindle.

In this case, the rear end of the operating arm is pivotally supported within the main body, and the front end thereof is provided with an operating button that protrudes from the front of the main body, but the clamper is provided directly in the middle of the operating arm. is a conventional example.

Therefore, the operating stroke of the operating button is larger than the moving stroke of the clamper, so if you try to ensure a sufficient moving stroke of the clamper, there is a problem that the operating stroke of the operating button becomes considerably large. To solve this problem, lengthen the operating arm.
The problem is that the device becomes larger and moreover, there are many design and assembly constraints related to the magnetic head mechanism that records signals on the disk and reads signals recorded on the disk. A new occurrence had occurred.

[Purpose of the invention]

The present invention was made in view of the above-mentioned points, and an object of the present invention is to ensure a sufficient movement stroke of the clamper without increasing the operation stroke of the operation button and the length of the operation arm. .

[Summary of the invention]

The magnetic disk device of the present invention has a lower substrate provided with a spindle rotationally driven by a motor, an upper substrate facing the lower substrate with a disk storage gap in between, and a disk insertion opening communicating with the disk storage gap. an operating arm that is pivotally supported by the upper substrate so as to be swingable in the vertical direction, is biased upward, and has an operating button at its front end that protrudes from the front panel; The clamper arm has a clamper whose middle part is pivotally supported by the operation arm so as to be able to swing vertically, and a clamper which is rotatably supported at the rear end to move toward and away from the spindle, and when the operation button is lowered, the clamper arm is an elastic body that elastically engages with a front end portion to elastically press the clamper against the spindle; and an elastic body that locks the operating arm in that position when the operating button is lowered to bring the clamper and the spindle into pressure contact. It is characterized by a lock body that holds the operation button in place and releases the lock of the operation arm when the operation button is lowered next time.With this, the operation stroke of the operation button is expanded by the clamper arm, and the clamper can be enlarged. It is meant to be moved.

[Embodiments of the invention]

A magnetic disk device of the present invention will be explained in detail based on an embodiment shown in the drawings.

In FIGS. 1 to 3, 1 is a lower substrate, a motor 2 is disposed at the bottom of this lower substrate 1, and a spindle 3, which is rotationally driven by this motor 2, is disposed on the upper surface of the lower substrate 1. ing.

Reference numeral 6 denotes an upper substrate, and the upper substrate 6 is screwed onto projecting edges 7 integrally provided on both sides of the lower substrate 1, and is opposed to the lower substrate 1 with a disk storage gap 8 in between. There is.

11 is a front panel, and this front panel 11 is screwed to the front end of the lower substrate 1, and the lower substrate 1
A disk insertion port 12 is formed at the front of the upper substrate 6 and communicates with the disk storage gap 8, and a through hole 13 for an operation button 20, which will be described later, is connected to the upper center of the disk insertion port 12. At the same time, a protrusion 14 facing the operation button 20 is formed at the lower central portion of the disk insertion slot 12.

17 is an operating arm, and this operating arm 17 is
Its rear end is supported slightly behind the spindle 3 on the upper substrate 6 via a shaft 18 so as to be able to swing in the vertical direction, and is supported upwardly by a spring 19 attached to the shaft 18. An operation button 20 is attached to the front end thereof and projects from the front panel 11 through the through hole 13. Note that this operating arm 17 is normally operated as follows.
The operating button 20 is raised by the spring 19 to a position where it does not block the disk insertion opening 12, and is held in contact with the front panel 11.

Reference numeral 23 designates a clamper arm. The clamper arm 23 has its central portion supported by the operating arm 17 slightly in front of the spindle 3 via a shaft 24 so as to be able to swing vertically. The rear end portion is biased upward by the attached spring 25, and a clamper 26 that moves toward and away from the spindle 3 is rotatably supported on this rear end portion.

As shown in FIG. 4, the clamper 26 is rotatably supported by a cylindrical clamper shaft 30 via a bearing 29, and an elastic ring 31 formed of rubber or the like is attached to the clamper shaft 30. ,
A washer 32 and an E-ring 33 are attached, and a pair of protrusions 34 protruding parallel to the rear end of the clamper arm 23 are engaged between the E-ring 33 and the washer 32. Axis 3
A guide shaft 35 having a small diameter at its lower end is inserted into the shaft 0, and this guide shaft 35 is implanted in a support frame 36 attached to the upper substrate 6.

Therefore, when the clamper 26 is lowered onto the spindle 3, the clamper shaft 30 is moved toward the guide shaft 35.
The spindle 3 is loosely fitted into the small diameter portion of the clamper arm 23 and can freely move between the pair of protrusions 34 of the clamper arm 23, and the only force that the spindle 3 receives from the clamper 26 is the force for clamping the disk.

Reference numeral 39 denotes a compression spring as an elastic body, and this compression spring 39 is supported by a shaft 40 installed on the upper substrate 6 at a position relative to the front end of the clamper arm 23, and is supported on this shaft 40 so as to be vertically movable. The ring-shaped push-up plate 41 is lifted until it comes into contact with an E-link 42 attached to the upper end of the shaft 40.

A pair of protrusions 45 that protrude parallel to the front end of the clamper arm 23 are opposed to the upper surface of the push-up plate 41.

Therefore, when the operating button 20 is pushed downward to lower the operating arm 17, the entire clamper arm 23 is lowered via the shaft 24, and during this lowering, the front end of the clamper arm 23 is first lowered. The projecting piece 45 at the rear end contacts the push-up plate 41, and then, due to this contact, the clamper arm 23 rotates clockwise about the shaft 24, which is descending in FIG. The clamper 26 descends significantly using the protrusion 45 at the front end as a fulcrum, and as the protrusion 34 descends, the clamper 26 descends and comes into contact with the spindle 3, and then, due to this contact, the protrusion at the front end of the clamper arm 23 45 pushes the push-up plate 41 downward to compress the compression spring 39, and this compression in turn applies a clockwise urging force to the clamper arm 23, causing the clamper 26 to come into elastic pressure contact with the spindle 3.

48 is a lock body, and this lock body 48 is the fifth
As shown in the figure, the rear end is connected to the compression spring 3.
The shaft 40, which supports the compression spring 39, is inserted into an arcuate hole 50 formed near the front end thereof, and is supported on the upper substrate 6 at the rear of the upper substrate 6 so as to be able to swing horizontally. The swinging range of the shaft 49 is restricted, and the shaft 49 is urged rightward by a spring 51 attached to the shaft 49 when viewed from the front.

A vertical piece 5 is attached to the front end of the lock body 48.
4 is bent and formed, a locking piece 55 is bent forward from the upper right edge of the vertical piece 54, and a locking piece 56 is bent rightward from the upper front edge of this locking piece 55, A spacing piece 5 is inserted from the lower right edge of the vertical piece 54 opposite to the locking piece 55 and the locking piece 56.
7 and a guide piece 58 are sequentially bent forward and to the right.Furthermore, a mounting piece 59 is bent in front of the upper left edge of the vertical piece 54, and a leaf spring 60 is attached to this mounting piece 59. Installed, this leaf spring 60
The tip of the locking piece 55 is in contact with the upper edge of the locking piece 55 .

Further, an engagement pin 63 whose tip has a small diameter from the rear of the operation button 20 is connected to the lock body 48.
A large diameter portion 64 of this engagement pin 63 faces the right side of the leaf spring 60, and a small diameter portion 65 of the engagement pin 63 is configured to engage and disengage from the locking piece 55, locking piece 56, etc. Note that the small diameter portion 6 of this engagement pin 63
5 is normally positioned above the lock piece 56.

68 is a magnetic head that records signals on the disk and reads signals recorded on the disk.
This magnetic head 68 is adapted to move in the front and back direction along a pair of guide rods 69.

72 is a first presser lever that brings the disk into contact with the magnetic head 68;
is adapted to move in the front and back direction together with the magnetic head 68 and is urged downward, and a contact member 73 such as a felt that contacts the disk is located at the lower part of the front end facing the magnetic head 68. It is provided.

76 is a case containing a disk and is attached to the lower board 1.
This presser lever 76 is urged downward, and a contact member 77 such as a sponge that contacts the case containing the disk is attached to the upper surface of the upper board 6 at the bottom. They are placed facing each other.

Each of the presser levers 72 and 76 is adapted to rise in conjunction with the operating arm 17 when the operating arm 17 is raised.

80 is an ejector lever, and the shaft 8 is attached to the upper board 6.
The shaft 81 is pivoted so as to be swingable in the front and rear directions, and is biased forward and downward by a spring 82 attached to this shaft 81. , a second engaging portion 85 for the locking claw 84 formed on the upper substrate 6, and the second presser lever 7.
The third engaging portions 87 for the locking release pieces 86 made of plate springs provided in the respective portions 6 are bent.

90 is a rectangular case that houses a floppy disk.

Next, the operation will be explained.

In the state shown in FIGS. 1 to 5, when the case 90 is pushed into the disk storage gap 8 from the disk insertion opening 12 of the front panel 11, the left side of the rear edge of the case 90 is pushed into the first position of the ejector lever 80. When the ejector lever 80 engages with the engaging portion 83 and moves rearward together with the case 90, and the case 90 is pushed to a predetermined position, the second engaging portion 85 of the ejector lever 80 engages with the upper substrate 6. It is locked by the locking claw 84. In addition, at this time, the engine lever 80
The third engaging portion 87 contacts the left side surface of the lock release piece 86 of the second presser lever 76, and
is deformed to the right.

In this state, when the operation button 20 is pushed downward to lower the operation arm 17, the entire clamper arm 23 is lowered. Raised board 41
Due to this contact, the clamper arm 23 rotates clockwise around the shaft 24, which is descending in FIG. As a result, the clamper 26 descends and comes into contact with the disk inside the case 90, and then the protrusion 45 at the front end of the clamper arm 23 compresses the compression spring 39 via the push-up plate 41, and Therefore, the clamper arm 23 is biased clockwise by the compression spring 39, and the clamper 26 elastically clamps the disc in the case 90 between it and the spindle 3, and in this state, the operating arm 17 is pressed against the lock body. Locked by 48.

That is, when the operation button 20 is pushed downward, the small diameter portion 65 of the engagement pin 63 of the operation button 20 first touches the upper edge of the lock piece 56 of the lock body 48, as shown in FIGS. Upon engagement, the lock body 48 moves to the left, and then, as shown in FIGS. In this state, the lock body 48 is moved to the right by the spring 51 so that the guide piece 58 of the lock body 48 comes into contact with the small diameter portion 65 of the engagement pin 63, and in this state, by stopping the pressing of the operation button 20, As the engagement pin 63 rises slightly together with the operation button 20, the lock body 48 moves to the right, and the small diameter portion 65 of the engagement pin 63 is guided by the guide piece 58 of the lock body 48, and the lock body 48 is locked. Lower edge of piece 56 and locking piece 5
5, thereby locking the operating arm 17 and maintaining the state in which the clamper 26 and the spindle 3 are in pressure contact with each other via the disk.

In this state, the first and second presser levers 72 and 76 are lowered so that the disk comes into contact with the magnetic head 68, and the case 90 is in pressure contact with the lower substrate 1, so the motor 2 moves the spindle 3 At the same time, a drive mechanism (not shown) moves the magnetic head 68 and the first presser lever 72 in the radial direction of the rotating disk to record signals on the disk or record signals on the disk. The signal can be read and transmitted. At this time, the lock release piece 86 of the second presser lever 76 descends together with the second presser lever 76 and disengages from the third engaging portion 87 of the eject lever 80, and the third engaging portion 87 of the eject lever 80 is removed. It will be in a state located below the section 87.

Then, in this state, when the operation button 20 is pushed downward again, firstly, the
As shown in the figure, the engagement pin 63 of the operation button 20
With the small diameter portion 65 of the lock body 48 passing over the lower end of the locking piece 55 of the lock body 48, the lock body 48 is moved to the right by the spring 51, and the small diameter portion 65 of the engagement pin 63 locks the lock body 48. Positioned to the left of the piece 55, the operating arm 17 is unlocked, and the large diameter portion 64 comes into contact with the leaf spring 60 of the lock body 48, and then the pushing of the operating button 20 is stopped in this state. , the engagement pin 63 along with the operation button 20
9 to 6, the small diameter portion 65 of the engagement pin 63 engages with the locking piece 5 of the lock body 48.
5 and beyond the upper end of the locking piece 55, the lock body 48 is moved to the left by the leaf spring 60 of the lock body 48, and the lock body 48 and the engagement pin 63 are The relationship returns to its original state.

Then, the operating arm 1 is operated by the locking body 48.
When the lock 7 is released and the operating arm 17 returns to its upward position, the clamper arm 23 also rises, and the clamper 26 rises and leaves the disk within the case 90.

Also, in this state, the first and second presser levers 72 and 76 are raised, and the disk and case 9
0, and the lock release piece 86 of the second presser lever 76 rises together with the second presser lever 76. is lifted, thereby causing the second ejector lever 80 to
As the engaging portion 85 of the first engaging portion 85 is disengaged from the locking claw 84 of the upper substrate 6, the ejector lever 80 is moved forward by the spring 82, and the case 90 that is engaged with the first engaging portion 83 is pushed forward. , the front end of the case 90 protrudes in front of the disk insertion slot 12 of the front panel 11, allowing the case 90 to be taken out.

[Effects of the Invention] As described above, according to the present invention, since the clamper arm is pivotally supported on the operation arm and the clamper is provided on the clamper arm, the swinging motion of the operation arm can be expanded by the clamper arm. A sufficient movement stroke of the clamper can be secured without increasing the operating stroke of the operating button or lengthening the operating arm. Both the coupling of the clamper and the spindle and the release of this coupling can be achieved by pressing the operation button.

[Brief explanation of drawings]

The figures show an embodiment of the magnetic disk device of the present invention, in which Fig. 1 is a plan view thereof, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a front view thereof, and Fig. 4 is a longitudinal sectional view of the clamper portion thereof. 5 is a perspective view of the lock body portion, and FIGS. 6 to 9 are explanatory diagrams of the operation of the lock body, where a is a plan view and b is a front view. DESCRIPTION OF SYMBOLS 1...Lower board, 2...Motor, 3...Spindle, 6...Upper board, 8...Disk storage gap, 11...Front panel, 12...Disk insertion slot, 17...Operation arm, 20... …Manual operation button,
23... Clamper arm, 26... Clamper, 3
9... Spring as an elastic body, 48... Lock body.

Claims (1)

[Claims] 1. A lower substrate provided with a spindle rotationally driven by a motor, an upper substrate opposed to the lower substrate with a disk storage gap in between, a front panel provided with a disk insertion port communicating with the disk storage gap, and the above-mentioned an operating arm that is pivotally supported by the upper substrate so as to be swingable in the vertical direction and is biased upward, and has an operating button at its front end that protrudes from the front panel; A clamper arm is pivotably supported to be able to swing vertically, and has a clamper rotatably supported at its rear end to move toward and away from the spindle, and when the operation button is lowered, the clamper arm is elastically engaged with the front end of the clamper arm. an elastic body that elastically presses the clamper against the spindle; and an elastic body that locks the operating arm in that position when the operating button is lowered to hold the clamper and the spindle in pressure contact, and then operates the operating arm. A magnetic disk device comprising a lock body that unlocks an operating arm when a button is lowered.