JPS62137785A - Disk cartridge - Google Patents

Abstract

PURPOSE:To facilitate the attachment of a shutter energizing spring together with an accurate attachment position secured and to improve assembling efficiency of a disk cartridge, by providing a flexed part to one of both arms of a twisting coil spring which energizes the shutter to control the arm position within a gap. CONSTITUTION:A twisting coil spring 37 is set into a gap 38 formed between the upper and lower cases 1a and 1b. On of both arms interlocks a part of the case 1a or 1b and the other arm 37b is bent at about 45 to the base part within the gap 38. The arm 37b reaches the inner wall surface of the case 1b from the inner wall surface of the case 1a and is bent again at 45 to extend upward through a flexed part 37c. Therefore the spring 37 contains an arm part set along the inner wall surface of the case 1a and another arm part set along the inner wall of the case 1b. Then the part 37c formed by those arm parts controls the deflection of the arm 37b in the width direction of the gap 38.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to disk cartridges such as magnetic disk cartridges, optical disk cartridges, and optical-magnetic disk cartridges.

In particular, the present invention relates to a disk cartridge equipped with a shutter for opening and closing a head insertion port.

[Conventional technology]

Fig. 16 is an exploded perspective view of a conventional magnetic disk cartridge, Fig. 17 is a partial plan view showing the magnetic disk cartridge in a state when not in use, and Fig. 18 shows a stopped state of the spring member and the cartridge case. Partial plan view shown, No. 19
The figure is a partial front sectional view of a similar part.

The magnetic disk cartridge includes a cartridge case 101 made of hard synthetic resin, and a magnetic disk 102 rotatably housed within the cartridge case 101.

The shutter 103 is slidably supported by the cartridge case 101.

There is a circular opening 01 approximately in the center of the cartridge case 101.
04 is formed, and a rad insertion port 105 is provided near it. Since the shutter 103 slides over the head insertion port 105, the upper surface near the head insertion port 105 is slightly lowered to form a recess 106, and the M movement of the shutter 103 is located near the front surface of the recess 106. A guide groove 107 extending along the direction is provided.

The shutter 103 is made of a metal plate, such as a stainless steel plate, and has a U-shaped side surface.

・Opening 1 that is approximately the same size as the rad insertion port 105
08, and a closing portion 109 that closes the head insertion port 105 is formed next to it, and two protruding pieces 110 (by cutting and raising) are provided to protrude in the direction. This protrusion 11
0 is the guide @ 101 of the cartridge case 101
It is inserted inside.

When the shutter 103 opens and closes the rad insertion port 105, the protrusion 110 slides within the guide groove 107, and the shutter 103 is prevented from coming off the cartridge case 101.

When the magnetic disk car 1-ridge is not in use, the closing portion IQ9 of the shutter 103 prevents the insertion of the nozzle rTI.
Since the L O5 must be closed, a torsion coil spring Ill is housed in the cartridge case 101 as shown in FIG. 17, and the shutter 103 is biased in the closing direction by the spring 111.

18 and 19 show the engagement relationship between the spring 111 and the cartridge case 101.

The spring 111 is housed in a gap 101a provided between both side walls of the cartridge case 101, and one spring 111i! !
1lla (not shown) is fixed in contact with the cartridge case 101, and the other arm 111b is bent at right angles in the horizontal direction, and this bent portion 111c is connected to the gap 101a.
Rib 10 protruding so as to partially close the upper opening of
1b, and engages with a portion of the shutter 103 at this position to constantly bias the shutter 103 in the closing direction.

[Problem that the invention seeks to solve]

In this conventional magnetic disk cartridge, one bowl 111 of the spring II+ moves together with the jusita 103.
The position of the spring 111 is controlled by the rib 101b, that is, the prevention of movement of the bowl 111b in the cartridge case thickness direction is done by the rib 101b.
When inserting into the gap 101a of 01, especially the rib 101b
This has the disadvantage that the coil portion of the spring gets in the way of insertion, and the efficiency of the insertion work cannot be improved.

The purpose of the present invention is to eliminate such drawbacks of the prior art,
To provide a high-quality disk cartridge in which a spring for urging a shutter can be easily mounted, the mounting position can be secured, and assembly work efficiency can be improved.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention rotates the disk once.
iJ Noh II! A cartridge case consisting of an upper case and a lower case, a shutter that is movably attached to the side of the cartridge case to open and close the hatch insertion opening of the IL cartridge case, and a shutter provided between the upper case and the lower case. A disc car 1 which is housed in a space and has one arm attached to a car F ridge case and a spring member that engages a rectangular arm with a shutter and always biases the shutter in one direction.
- A torsion coil spring is used as the spring member, and one arm that engages with the shutter has a bent part that comes into contact with both wall surfaces of the gap and restricts the arm's movement direction and orthogonal direction b. It is characterized by being integrally formed.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a magnetic disk cartridge according to an embodiment of the present invention when not in use, and FIG. 2 is a plan view of the magnetic disk cartridge according to an embodiment of the present invention. The figure is a plan view of the upper case, Figure 1 is a bottom view of the upper case,
Figure 5 is a bottom view of the upper case of the Greening Sea-1. ; r+J is below) r
Figure 7 is a plan view of the case with Cleany Legsy 1- attached.
t71 is a bottom view of the ζ case, FIG. 9 is an enlarged plan view of the shutter, FIG. 10 is an enlarged front view of the shutter, and 11th! i
121 is an enlarged perspective view of the light protector, and FIG. 13 is a partial sectional view of the part where the wooden members are arranged.

The magnetic disk cartridge mainly includes a cartridge case 1, a magnetic disk 2 rotatably housed within the cartridge case 1, and a shutter 3 movably supported by the cartridge case 1.

The cartridge case 1 is composed of an upper case 1a and a lower case 1b, which are molded from a hard synthetic resin such as -ABS resin.

A rectangular head insertion opening 5 is provided near one side of the cartridge case 1, and a circular opening 4 is formed approximately in the center of the lower case, as shown in FIGS. 6 to 8. has been done. In the vicinity of the front surfaces of the upper case Ia and the lower case 1b, trapezoidal recesses 6 which are slightly lowered in order to restrict the sliding range of the shutter 3 are formed respectively. 5 have been established.

As shown in FIG. 3, in the upper case la, a rectangular plate suppression lower is formed on the upstream side of the head insertion opening 5 in the disk rotation direction, and behind this is a lower label. A pasting section 8 is provided, and a label 9 is pasted thereon as shown in FIG. As shown in FIG. 4, a disc storage section 12 is formed inside by regular ribs 11 provided at each of the four corners of the inner surface of the upper case 1a. In the disk storage section 12, there is only one rad insertion slot 5 and the plate suppression lower f:: which is stored in the disk storage section 12 and is approximately concentric with the center of rotation of the magnetic disk 2 1r14.1<! -1-shaped rib 10
One or more, preferably several 4M, are formed! I'm here.

After inserting the suppression plate 13 into the plate suppression lower as shown in FIG. It is placed,
Its peripheral portion is partially heat-sealed to the upper case 1a. Therefore, the suppression plate 13
It is covered with 16 and has a shape.

As shown in tg611i7, a generally raised receiving portion 18 is formed on the inner surface of the lower case 1b at a position facing the plate suppression lower of the upper case la. ”: Case 1
Similarly to a, the regular ribs It provided at the four corners of the inner surface of the lower case 1b provide a disk storage section 12 inside the lower case 1b.
is formed, and one or more, preferably a plurality of arcuate ribs 1O are formed approximately concentrically with the center of rotation of the magnetic disk 2 at locations other than the seat insertion opening 5 and the receiving portion I8. There is.

As shown in FIG. 7, the disk storage section 1 of the lower case ib
A substantially C-shaped cleaning sheet 16 is also placed inside the cleaning sheet 2 so as to cover the receiving portion 18, and the peripheral portion of each sheet 16 is partially heat-sealed 17.

As shown in FIGS. 6 and 7, small chevron-shaped protrusions 19 are formed near one corner of the lower case 1b so as to face each other, and a rectangular operation port 20 is opened in the vicinity of the protrusions 19.
A write protector 21 for preventing erroneous erasure is arranged from the operation opening 20 to the chevron-shaped protrusion 19. As shown in FIG. 12, this light protector 21 has a main body portion 22 and leg portions 23. This leg portion 23 is a chevron-shaped protrusion of the lower case 1b! 9 elastically engages with the 1 main body portion 22
An operation protrusion 24 provided at the operation port 20 is inserted into the operation port 20. For example, the position of the write protector 21 shown in FIG. 7 is in a state where writing (erasing) is not possible. moves over the two peaks of the chevron-shaped protrusion 19, and the write protector 21 becomes, for example, in a writable (erasable) position.

The shutter 3 is made of a synthetic resin that is slightly softer and more elastically deformable than the cartridge case 1, such as polyacetal or polyamide resin. The ivy 3 mutually connects the first face plate part 26, the second face plate part 27 provided to face the first face plate part 26, and the front side end of the double-sided plate part 26.27. The connecting portion 28 has a U-shaped side surface and a trapezoidal planar shape. First face plate part 26 and second face t'2 part 27
has a sufficient width to close off the head insertion port 5.

On the inner surface of the connecting portion 28 facing the cartridge case l, two elastically deformable protrusions 29 are protruded at a predetermined interval along the sliding direction of the shutter 3.
, this protrusion 29 consists of a columnar part 30 extending almost perpendicularly from the connecting part 28, an upper locking pawl 31 and a lower locking pawl 32 provided at the tip thereof. ing.

As shown in No. 9, FIG. 10, and FIG.
is formed, and an abutment wall 35 is provided at the side end thereof. What about the second JKM35? rS [Face plate part 26. The second face plate portion 27 and the connecting portion 28 are integrally connected to the inner surface of the jujube, thereby forming the contact wall 35. The outer surface of this wall 35 facing the recessed portion 34 is a contact surface against which an opening member 36 of the shutter 3 provided in the recording/reproducing apparatus comes into contact, as shown in FIG. on the other hand.

The inner surface of the contact wall 35 is a contact surface with which one end of a Zl-shaped spring member 37 that elastically biases the shutter 3 in the opening direction comes into elastic contact with the contact wall 35, the first face plate 26, and the second Face plate part 2
7 and the connecting portion 28 form a blind alley-like recess, so the end of the spring member 37 inserted therein will not come off.

FIG. 13 is a sectional view showing the relationship between the tip of one arm of the spring member 37 and the cartridge case.
The arm 3741, which is not shown, is a torsion recoil spring disposed inside the upper case 1a or the lower case lb.
The other arm 37b is bent at an angle of about 15 degrees with respect to the base within the gap 38, reaches from the inner wall surface of the upper case 1a to the inner wall surface of the lower case 11), and bends again at 45 degrees 1i. It has a bent portion 37c that is bent and extends in the negative direction. Therefore, the spring member 37 has an arm portion along the inner wall surface of the upper case 1a and an arm portion along the inner wall surface of the lower case Ih. The wobbling of the arm 37b in the width direction (thickness direction of the cartridge case) is restricted. The tip of this @37b is further bent by approximately 90 degrees and positioned above the upper end of the upper case 1a, and this bent portion 37d engages with a part of the shutter 3 (not shown).

FIG. 14 shows a modification of the spring member 37.
a) The figure shows the bending part 37c formed in a semicircular shape, (b)
The figure shows a bent portion 37c formed into a triangular protrusion, (
c) The figure shows the bent portion 37c formed in the shape of a quarter circle. In any of these embodiments, the base of the arm 37b is the upper case la.

The Hi curved portion 37c is opposite to one side wall surface of the case lb.
The tip of the gap 38 faces the other side wall surface.
This prevents blurring in the width direction.

Next, mounting of the spring member 37 and the shutter 3 will be explained.

First, the torsion coil spring 37 is inserted into the air gap 38 formed between the joined upper and lower cases la and lb.
Insert. At this time, since the opening has the same width as the gap 38, the coil portion of the torsion coil spring 37 can also be easily inserted. Since the torsion coil spring 37 has approximately the same width as the gap 38 due to the presence of the bent portion 37c, the arm 37b can be positioned along one inner wall surface without wobbling within the gap 38. Ru. Insert the torsion coil spring 37 and connect one IJi! After the shutter 37b is engaged with the upper case 1a or the lower case ib, the shutter 3 is attached from above.

In the shutter 3, the pair of face plate parts 26127 are connected to the upper case La+
Fits onto the recess 6 on the side surface of the lower case 1b.

The locking claws 31+32 are not pushed apart due to the elasticity of the shutter 3 itself, but are engaged over the protrusion 33. As a result, the shutter 3 is prevented from being removed and is also held slidably within the recess 6. When the shutter 3 is attached, a part of the shutter 3 and one IQ 37 b of the spring member 37 come into contact with each other, and the shutter 3 is always urged in the closing direction by the spring member 37.

FIG. 15 shows a modification of the mounting structure of the shutter 3, in which a notch 33a is formed in the protrusion 33 with which the locking pawls 31 and 32 engage, and the protrusion 33 itself is provided with a notch 33a for attaching the cartridge case l. It has a structure that provides elasticity in the plane direction. The notch 33a is diagonal as shown in the figure, and the locking claws 31 and 32 of the shutter 3 are moved from an oblique direction to the cartridge case 1 by utilizing the inward deformation of the protrusion 33. In addition to being able to be inserted, if a force is applied to the shutter 3 in the direction of falling off after installation.

Even if the elastic protrusion 33 deforms outward, the protrusion 33 comes into contact with the fixed protrusion portion and prevents further deformation, ultimately preventing the locking claws 31 and 32 from coming off. This is how it was done.

By doing this, the shutter face plate portion 26.degree. 27 of the shutter 3 is attached while being pushed apart, thereby deteriorating the elastic force of the shutter itself and making it easier for the shutter to fall off. 27 can be sufficiently maintained, and the shutter 3 will not fall off unnecessarily.

In the above embodiment, the shutter 3 is used to open and close only the head insertion port 5, but the shutter 3 can be configured to open and close both the head insertion port 5 and the opening 4.

Furthermore, although the above embodiments have been described with respect to a magnetic disk cartridge, the present invention is not limited thereto, and can be applied to other disk cartridges such as optical disk cartridges and optical-magnetic disk cartridges.

Note that the spring member may not only be always biased in the closing direction but also biased in the opening direction.

〔effect〕

As described above, in the present invention, one arm of the torsion coil spring that biases the shutter is provided with a bent portion to regulate the position of the arm within the gap.

Therefore, it is not necessary to form a rib for regulating the position of the spring member in the upper part of the gap, and the opening of the gap can be made large, so that the spring member can be easily inserted, and the efficiency of the assembly work is improved. Moreover, since the arm of the spring member does not shake, it can be reliably engaged with the shutter, and the shutter can operate reliably.

[Brief explanation of drawings]

1 to 15 are for explaining a magnetic disk cartridge according to an embodiment of the present invention, FIG. 1 is a plan view of the disk cartridge when not in use, and FIG. 2 is a plan view of the disk cartridge in use. Fig. 3 is a plan view of the upper case. Figure 4 is a bottom view of the upper case, Figure 5 is a bottom view of the upper case with the cleaning sheet attached, Figure 6 is a plan view of the lower case, and Figure 7 is the bottom view of the upper case with the cleaning sheet attached. A plan view of the lower case. Fig. 8 is a bottom view of the lower case, Fig. 9 is an enlarged plan view of the shutter, and 1st OIli8! I is an enlarged front view of the shutter. FIG. 11 is an enlarged right side view of the shutter, FIG. 12 is an enlarged perspective view of the light protector, FIG. 13 is a partial sectional view of the spring member arrangement part, and FIGS. 14(a) and (b). (C) is a diagram showing a modification of the bent portion of the spring member, and FIG. 15 is a plan view showing a modification of the shutter locking portion. 16 to 19 are for explaining a conventional magnetic disk cartridge. FIG. 16 is a perspective view of the magnetic disk cartridge, and FIG. 17 is a plan view of the magnetic disk cartridge for explaining the position of the spring member. Figure, 1st
FIG. 8 is a top view showing the relationship between the spring member and the cartridge case, and FIG. 19 is a similar front sectional view. 1...Cartridge case, 1a°°°゛upper case, tb...lower case, 2...-magnetic disk, 3...shutter, 5... ...Head insertion port, 37...Eye...Spring member, 37a, 37b
...Arm of spring member, 37c...Bending portion, 38...Gap. Agent: Patent attorney Kenjibu Ni.゛・+'(f''', - bu 1 口q 3 sang 2 Figure T3 Figure 4 drunkenness S 口bu 6 昌f 7 Figure If /7
// /γ2〆sai 8 mouth 7 10 El 2γ 22 bu 4 group sai 15
1 yen 1 year old 17 FiI zr IS σ] My QEshi1

Claims (1)

[Claims] A cartridge case consisting of an upper case and a lower case that rotatably house disks, a shutter that is slidably attached to the side of the cartridge case and opens and closes the head insertion opening of the cartridge case, and the upper case and A disk cartridge which is housed in a space provided between the lower case and has one arm attached to the cartridge case and a spring member which engages the other arm with the shutter and always biases the shutter in one direction. A torsion coil spring is used as the spring member, and one arm that engages with the shutter is integrally provided with a bent portion that comes into contact with both inner wall surfaces of the gap and restricts wobbling in a direction orthogonal to the moving direction of the arm. A disc cartridge characterized by the following: