JPH0249014Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a cartridge insertion opening opening/closing mechanism.
In particular, the present invention relates to a cartridge insertion opening/closing mechanism configured to stably press and hold a lid member that closes the insertion opening.

BACKGROUND TECHNOLOGY For example, in a magnetic disk device, etc., a lid member for opening and closing an insertion opening into which a cartridge is inserted is rotatably provided inside the insertion opening, and the lid member is pushed in the closing direction by the force of a torsion spring. An insertion port opening/closing mechanism configured to force the insertion port to open and close is provided. However,
In this mechanism, since the torsion springs are arranged on both sides of the lid member, there is a problem that the number of parts increases. In order to solve such problems, Jikoaki
"Door opening/closing mechanism" disclosed in Publication No. 63-43651
is proposed. This mechanism consists of a lid member that opens and closes the insertion slot, an eccentric shaft located at a position offset from the axis of rotation of the lid member, and a leaf spring that presses the eccentric shaft and urges the lid member to the closed position. and has.

Problems to be Solved by the Invention However, in the conventional mechanism described above, the eccentric shaft of the lid member is pressed against the free end of the leaf spring, and the rotating shaft is detachably supported. If the lid member is inserted well, the force pressing the lid member into the attachment increases, or if the spring force of the leaf spring is weakened by opening and closing the lid member, the rotating shaft and eccentric shaft of the lid member tend to come off. There is. In addition, in the conventional mechanism, a wide leaf spring is provided on the upper inner wall of the insertion port, and both ends of this leaf spring press the eccentric shaft of the lid member, so a space is required to install the leaf spring at the top of the insertion port. Another issue is that it is not possible to make the device thinner.

Therefore, an object of the present invention is to provide a cartridge insertion port opening/closing mechanism that solves the above problems.

Means for Solving the Problems The present invention includes a lid member that has a rotation shaft near both left and right ends and is rotatably provided to open and close an insertion opening into which a cartridge is inserted; A pair of protrusions protrude from eccentric positions to both ends of the lid member, and are provided on the left and right inner walls of the peripheral edge of the insertion port, one end of which is fixed to the inner wall, and the other end of which is attached to a hole drilled near the insertion port. It consists of a pair of spring members that are loosely fitted and press the pair of protrusions in the closing direction of the lid member.

Function The spring member that biases the pair of protrusions protruding from both ends of the lid member in the lid closing direction has one end fixed to the inner wall of the peripheral edge of the insertion opening, and the other end fitted into the hole near the insertion opening. , it is possible to prevent the rotation axis of the lid member from coming off. Moreover, by arranging the pair of spring members on the left and right sides of the lid member, there is no need for a space for attaching the leaf spring members on the upper part of the lid member, and the device can be made thinner.

Embodiment Next, an embodiment of the cartridge insertion port opening/closing mechanism according to the present invention will be described.

First, to roughly explain a disk device to which the cartridge insertion port opening/closing mechanism of the present invention is applied, FIGS. 1A to 1F are respectively a plan view, a front view, a right side view, a left side view, and a FIG. 2 is a partially cutaway bottom view and rear view of the cartridge housing; FIG. 2 is a partially cutaway plan view of the cartridge housing with the disk cartridge installed; It is a right side view.

The disk device 1 generally includes a chassis 2, a front panel 3, a single motor 4, and a cartridge housing 5. This disk device 1
A disk cartridge 6 shown in FIG. 4 is attached to the. The disk cartridge 6 has a 2.8-inch flexible magnetic disk 9 rotatably housed in a cartridge body 8 formed by combining a pair of cartridge halves 7.

The disk cartridge 6 is inserted into the cartridge housing 5 in the direction of arrow _X1 through a cartridge insertion opening (hereinafter referred to as insertion opening) 11 of the front panel 3 with the head window 10 facing forward. When the cartridge 6 is inserted deep into the housing 5, the eject member 12 is unlocked and slid by the spring ₁₃ in the direction of the arrow Processing is performed in _one direction, and the cartridge 6 is installed in a predetermined position. The magnetic disk 9 has a center hole 1
4 is fitted onto the drive shaft 15, the hub 16 is placed on the turntable 17, and the motor 4 starts rotating in the direction of arrow A, rotating at 423 RPM. Further, the lower surface of the magnetic disk 19 is in contact with the magnetic head 18, and the pad 19 is in contact with the upper surface of the magnetic disk 9.

In addition, the cam plate 20 rotates approximately 330 degrees clockwise in FIGS.
It moves in the _two directions of arrow X while being guided by b and 24. The magnetic head 18 moves from position _P1 in the radial direction of the magnetic disk 9 to position _P2 in about 8 seconds in FIG. The information signal is written here.

When the eject button 26 is pressed, the eject member 12 slides in the direction of arrow _X1 and pushes up the housing 5 in the direction of arrow _Z2 . Cartridge 6
The housing 5 rises together with the housing 5, comes off the drive shaft 15, is pushed in the direction of arrow _X2 , and is ejected with a portion protruding from the insertion opening 11.

Next, the configuration of each part of the disk device 1 will be explained.

First, the housing 5 will be explained. As shown in FIGS. 1A to C, 2, and 3, the housing 5 has holes 30 and 31 formed at both ends of the first diagonal line in FIG. Guide poles 32, 33 installed at the locations where
The guide poles 32 and 33 are fitted into the guide poles 32 and 33 to guide the guide poles 32 and 33 so as to be movable in the directions of the arrows Z ₁ and Z ₂ . One hole 31 is designed to absorb dimensional errors and to allow smooth vertical movement of the housing 5.
is a long hole. This hole 31 is connected to the guide pole 3
The direction of the diagonal line of the housing 5 passing through the housings 2 and 33 is the longitudinal direction. As a result, the housing 5 is less likely to have rotational play in a plane centering on the guide pole 32, and the housing 5 can move up and down more smoothly than when a long hole is formed in the shape of arrow _X1 , for example. Further, two protrusions 5a to 5d are provided on the left and right side surfaces of the housing 5, respectively, and the protrusions 5a and 5b are connected to the slope portions 12a and 12b of the eject member 12, as shown in FIG. 1D.
The other protrusions 5c and 5d are in contact with C in Fig. 1.
As shown in FIG.
c, is in contact with 12d.

In the initial state in which the ejecting member 12 is moving in the direction of arrow _X1 , the housing 5 is in the raised position. When the eject member 12 moves in the direction of _arrow
is pulled by springs 34, 35, and 36, and descends along guide poles 32, 33 in the direction of arrow _Z1 . When the ejecting member 12 moves in the direction of arrow _X1 , the slope portions 12a to 12d push up the corresponding protrusions 5a to 5d, respectively, and the housing 5 rises in the direction of arrow _Z2 along the guide poles 32 and 33.

Further, as shown in FIG. 6, the slope portion 12a is constituted by an elongated plate portion bent outward. Other slope parts 12b, 12c, 12
d also has the same configuration as the slope portion 12a.

Next, a mechanism for rotating the drive shaft 15 and the cam plate 20 will be explained with particular reference to FIGS. 7 to 9.

In each figure, reference numeral 40 denotes a support made of diamond cast, which integrally includes a substantially triangular flat plate portion 40a and support portions 40b, 40c, and 40d at the top of each of the flat plate portions 40a. As shown in FIGS. 9 and 10, this support 40 has recesses 41a to 41a formed in the base plate 2a of the chassis 2 at the tips of the respective support columns 40b to 40d.
41c and is screwed with screws 42a to 42c.

In particular, as shown in FIG.
3b. Reference numeral 44 denotes a flywheel, which is fixed to overlap the pulley portion 43a. Pulley gear body 43 to which flywheel 44 is fixed
is press-fitted into the drive shaft 15 and fixed. The drive shaft 15 has its lower end supported by a bearing 45 press-fitted into the flat plate part 40a, and its upper end near the base plate part 2a.
It is supported by a bearing 46 fixed to.

The cam plate 20 and the resin gear 47 are integrally configured and are rotatably supported on the drive shaft 15 at a position between the gear 43b and the base plate portion 2a.

The gear body 48 has a large diameter gear 48a and a small diameter gear 48b.
The large diameter gear 48a meshes with the gear 43, and the small diameter gear 48b meshes with the gear 47. No oil-impregnated bearing is provided in the boss portion of the gear body 48, and the gear body 48 is attached to the shaft 49.
It is directly bearing the shaft. Further, the gear body 48 is connected to the shaft 4
It is prevented from coming off by a flange 49a at the top of 9.

A flat belt 51 is stretched between the pulley 50 of the motor 4 and the pulley 42a.

The drive shaft 15 is rotated by the motor 4 via a flat belt 51. The cam plate 20 is rotated by decelerating the rotation taken out from the drive shaft 15 via the gear body 48 and the gear 47.

Next, the opening/closing mechanism of the insertion port 11, which is a main part of the present invention, will be explained with reference to FIGS. 10 to 13.

As shown in FIGS. 10 and 12A, a lid member 80 is attached to the back side of the front panel 13 so as to be openable and closable. The elongated lid member 80 is
As shown in FIGS. 11A and 11B, ribs 81 on both sides,
82, shaft portion 8 protruding inward from ribs 81, 82
3 and 84, and protrusions 85 and 86 that protrude on both sides from the ribs 81 and 82 at positions offset from the axes of the shaft parts 83 and 84. Shaft portions 83, 84 and protruding portion 8
5 and 86 are offset in both the _Z1 direction and the _X1 direction so that their axes are eccentric.

As shown in FIG. 10 and FIG. 12A, the lid member 80 described above has shaft portions 83 and 84 connected to projecting pieces 87 and 84, respectively.
8, and the protrusions 85 and 86 are pressed by leaf springs 89 and 90, respectively, and biased in the direction of arrow _X2 , thereby blocking the insertion opening 11.
Further, the protruding parts 85 and 86 are connected to the top plate part 91 and the protruding piece 8.
It falls between 7 and 88.

The leaf springs 89 and 90 have their lower parts connected to the front panel 3.
It is attached to the front panel 3 on the tip side.
It is fitted into the holes 92 and 93 of the top plate part 91 of.
The reason why the tips of the leaf springs 89, 90 are inserted into the holes 92, 93 is that the upper ends of the leaf springs 89, 90 are
To prevent displacement in the Y ₁ and Y ₂ directions, that is,
This is to prevent the leaf springs 89, 90 from coming off the protrusions 85, 86.

Note that the upper ends of the leaf springs 89 and 90 have holes 92 and 93.
It fits loosely inside. This causes the lid member 80 to open and close as shown in FIGS. 12A and 12B.
This is to allow the protrusions 85 and 86 of No. 0 to move in the directions of arrows X ₁ and X ₂ .

Further, the lower end portions of the leaf springs 89 and 90 are fixed to the inner wall of the front pulse 3, and the upper end portions are connected to the holes 92 and 9.
3, even if the lid member 80 rotates greatly in the opening direction, the plate springs 89 and 90 only bend at the contact portions of the protrusions 85 and 86, as shown in FIG. 12B. . Therefore, when the lid member 80 is fully opened, the shaft portion 8
3 and 84 and the protrusions 85 and 86 are reliably prevented from coming off from the front panel 3. That is, in the present invention, the lid member 80 is attached to the front panel 3 in a non-removable manner.

This configuration is simpler than the general configuration in which the lid member is mounted with the shafts on both sides supported by bearings, and the shaft is biased in the direction of closing the lid by a torsion coil spring installed on the shaft. Therefore, it is easy to assemble.

Further, a leaf spring 8 biases the lid member 80 in the lid opening direction.
0 and 90 are arranged on both the left and right sides of the lid member 80, there is no need for space for attaching a leaf spring member to the top of the lid member 80 as in the conventional case, and the disk device 1 can be made thinner accordingly. can.

Insert the cartridge 6 through the insertion slot ₁₁ using the arrow
When inserted in this direction, the lid member 80 is pushed by the tip of the cartridge 6 and opens as shown in FIG. 12B. That is, the lid member 80 rotates clockwise about the shaft portion 83 while bending the leaf spring 89. When the cartridge 6 is attached, the lid member 80
becomes the state shown in FIG. 12C.

During the cartridge ejection operation, the lid member 80
Rotates clockwise along with the upper shaft of the cartridge 6,
When the cartridge 6 is ejected from the disk device 1, it is rotated counterclockwise by the pressing force of the leaf springs 89, 90 to close the insertion port 11 as shown in FIG. 12A.

Further, 94 and 95 are supporting protrusions, which are protruded from the back surface of the front panel 3. The supporting protrusions 94 and 95 are provided with the protrusions 85 and 86 even when the lid member 80 is open as shown in FIG. 12B.
The cover member 80 protrudes to a position where it can be opposed to the cover member 80, and prevents the cover member 80 from coming off due to, for example, an impact when the disk device 1 is dropped.

Effects of the Invention As described above, in the cartridge insertion opening/closing mechanism according to the present invention, one end of the spring member that biases the pair of projections protruding from both ends of the lid member in the direction of closing the lid is fixed to the inner wall of the peripheral edge of the insertion opening. Since the other end is fitted into the hole near the insertion opening, it is possible to reliably prevent the rotation axis of the lid member from coming off.

Therefore, even if the cartridge is forcefully inserted or the cartridge is inserted repeatedly, the lid member is attached in a non-removable state, which prevents the lid member from falling off, thereby improving the reliability of the device. Sexuality increases. Further, by arranging the pair of spring members on the left and right sides of the lid member, there is no need for a space for attaching the leaf spring members on the upper part of the lid member, and the device can be made thinner.

[Brief explanation of the drawing]

1A to 1F are a plan view, a front view, a left side view, a right side view, respectively, of a disk device to which an embodiment of the cartridge insertion port opening/closing mechanism according to the present invention is applied;
A bottom view with the bottom cover partially cut away, a rear view,
FIG. 2 is a partially cutaway plan view of the cartridge housing; FIG. 3 is a right side view of the disk device with the disk cartridge installed;
FIG. 4 is a perspective view of a disk cartridge attached to a disk device, FIG. 5 is a view showing a cam plate and a track formed on the disk by the rotation of this cam plate, and FIG. 6 is a view of an eject member. FIG. 7 is a plan view of the unit in which the drive shaft and the cam plate are assembled; FIG. 8 is a cross-sectional view taken along line X-X in FIG. 7; 9 is an exploded perspective view of the unit shown in FIG. 7, FIG. 10 is a rear view of the front panel, FIG. 11 is a rear view and side view of the lid member, and FIG. FIGS. 12B and 12C, which are cross-sectional views taken along the middle XA-XA line, show the open and closed states of the lid member during the insertion of the disk cartridge and when the installation is completed, respectively. DESCRIPTION OF SYMBOLS 1...Disk device, 4...Motor, 6...Disk cartridge, 9...Magnetic disk, 11...Insertion slot, 15...Drive shaft, 16...Hub, 17...Turntable, 18...Magnetic head, 20...Cam plate, 25
...Spiral track, 40...Support, 43...Pulley/gear body, 44...Flywheel, 47...Gear, 48...Gear body, 49...Shaft, 80...Lid member, 8
3, 84... Shaft part, 85, 86... Projection part, 89, 9
0...Plate spring, 92, 93...Hole, 94, 95...Support protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] A lid member having a rotation axis near both left and right ends and rotatably provided to open and close an insertion opening into which a cartridge is inserted; a pair of protrusions that protrude from the position to both ends of the lid member; and a hole provided on the left and right inner walls of the peripheral edge of the insertion opening, one end of which is fixed to the inner wall, and the other end of which is bored near the insertion opening. A cartridge insertion opening opening/closing mechanism comprising: a pair of spring members loosely fitted to press the pair of protrusions in the closing direction of the lid member.