JP3414009B2 - Disk cartridge - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording a predetermined information signal.
Disk-shaped recording media such as optical disks and magneto-optical disks
(Hereinafter referred to as a disk) in a rotatable manner.
Related to cartridges. 2. Description of the Related Art Generally, a disk cartridge is
Disc on which information signals are recorded and the disc
A car that combines a pair of upper and lower shells that are rotatably stored
And a cartridge body. Disk cart
In the cartridge, the signal recording section of the disc is attached to the cartridge body.
For recording / reproducing that part of the
A mouth is formed. Disc cartridge records
When loaded into the playback device, the information signal on the recording / playback device side
Signal reproducing means enters from the recording / reproducing opening and
The information signal recorded in the signal recording section is reproduced. [0003] Disc cartridges are not used.
Dust, etc. enter through the recording / reproducing
To prevent adhesion to the surface of the disc
Record to prevent the surface of the disc from being damaged.
A shutter member is provided for closing the opening for reproduction.
You. This shutter member is located on the front of the cartridge body.
Attached to a slide member that is slidably assembled
Have been. The shutter member is a disk cartridge.
When loaded into the recording / reproducing device, the system on the recording / reproducing device side
The recording / reproducing opening is closed by the shutter driving member.
The slide operation is performed from the state to the open state. [0004] The disk cartridge has a shutter member.
In order to keep the recording / reproducing opening closed,
Equipped with a lock member that regulates the slide operation of the ride member
ing. This lock member is located in the operating area of the slide member.
It is provided rotatably on the cartridge body facing the face,
The slide member is locked and held at the position described above. Accordingly
The shutter member slides carelessly when not in use.
To open the recording / reproduction opening.
You. The disk cartridge has a recording / reproducing opening.
The slide operation moves from the closed state to the open state.
Shutter member in the direction to close the recording / reproducing opening
And a shutter spring that urges the shutter. This Sha
The spring has a center torsion coil and a pair of
It is composed of a torsion spring consisting of an arm and
It is provided at one corner of the cartridge body. Shi
One end of the arm portion of the shutter spring is a shutter member.
And the other end is fixed to the frame.
ing. The shutter spring operates when the shutter member
In the state where the raw opening is opened and moved
When the arm is closed,
That urges the data member in the direction to close the recording / reproducing opening
Sexual power is bred. In general, the torsion spring is
The torsion coil part is mounted on a pin shaft etc.
Assembled to a frame or the like. However,
The mounting structure of the spring
Limited space disc due to need for pace
It is difficult to adopt it for a cartridge. For this reason,
In a disk cartridge, as described above,
Arm of the shutter member and the support portion of the cartridge body
It is assembled in a state of being bridged between. Shutters
The coupling is a small disk with a relatively small diameter disk.
In the cartridge, the elasticity of the force is small.
The recording / reproducing opening with the shutter member stable.
Energize in the closing direction. However, the shutter sp
The ring is a disk car with a relatively large diameter disk
In the case of the cartridge, the elastic force is large,
Phenomenon such as the coil part jumping up inside
When the recording / reproducing opening is closed with the
This causes a problem that the battery is not biased in the opposite direction. In order to solve this problem, for example,
The person described in Japanese Patent Laid-Open Publication No. 3-62380
Disk cartridge B disclosed in
Was. This disk cartridge B is shown in FIGS.
As shown in FIG. 1, a disc 1 on which a predetermined information signal is recorded
01 and a part of the signal recording portion of the disc 101
Cartridge with a recording / reproducing opening 110
And the main body 102. The disk cartridge B is a cartridge
A slide slidably supported on the front of the main body 102
And a slide member 112 attached to the slide member 112.
And slide along the cartridge body 102.
Member 10 for opening and closing recording / reproducing opening 110
3 is provided. The disk cartridge B is a slide member.
A first rack 124 provided on one side surface of the
Of the cartridge body 1 facing the first rack 124.
02, and a second rack 126 provided in the first rack 126.
Pick 124 interposed between the rack 124 and the second rack 126.
The pinion gear 127 and the pinion gear 127
Spring holder 129 and the spring holder
129 hangs on the tip end portion 128b of one arm portion 128a.
And the distal end portion 128d of the other arm portion 128c.
Is formed on the cartridge body 102 and is
And an application spring 128. The slide member 112 has a rod shape having a substantially rectangular cross section.
The cartridge body 1 is formed as shown in FIG.
02, the inner surface 10 of the cartridge body 102
Slide guide recesses 114a, 11 protruding above 5a
It is slidably supported in parallel with 4b. The shutter member 103 is a cartridge main body.
To a size that can close the recording / reproducing opening 110 of FIG.
Is formed. The shutter member 103 slides
It is attached to the member 112 by screwing. Therefore,
The shutter member 103 records the disc cartridge B.
Recorded by the shutter drive member loaded in the playback device
The slide operation is performed to open the playback opening 110 side.
It is. The first rack 124 has a slide guide recess.
Parts 114a, 114b of the cartridge body 102
Slide the gear part inward at the inward position.
112 is fixed to the side surface of the cartridge body 102 side.
ing. The first rack 124 includes the cartridge body 10.
Gear portion support wall 130 protruding from inner surface portion 105a
And the gear portion is integrally formed with the slide member 112.
The slide guide recess 114 is brought into sliding contact with the support wall 130.
a, and slides in parallel with 114b. The second rack 126 includes a cartridge main body.
The first rack 124 and the inner surface 105a of the
The slide guide recesses 114a and 114b
It is fixed at intervals. The pinion gear 127 is connected to the first rack 12
4 and the second rack 126,
Mesh with the first rack 124 and the second rack 126
Is done. As shown in FIG. 13, the pinion gear 127 has
Is provided with a fitting hole 127a in the axial direction. The spring holder 129 is provided as shown in FIG.
The main body 129a has a substantially cylindrical shape.
And a disk portion 129b formed on the peripheral surface of the disk.
The disk holder 129b of this spring holder 129 has a pinion gear.
Pinion 129a until it contacts the upper surface of
By fitting into the fitting hole 127a of the gear 127,
It is combined with the pinion gear 127. Spring holder
129 is located at the center of the main body 129a.
Tip 1 of one arm 128d of the spring 128
28b is provided with an axial engagement hole 129c to be engaged.
ing. The torsion spring 128 has a central torsion.
From the coil portion 128e and the torsion coil portion 128e
It is composed of a pair of extended arm portions 128a and 128c.
Has been established. The torsion spring 128 is a torsion coil
The part 128e is directed inward of the cartridge body 102,
The tip bent portion 128b of one arm portion 128a is
While engaging with the engagement hole 129c of the rudder 129, the other
The bent end portion 128d of the arm portion 128c is
By locking the spring locking portion 131 of the main body 102,
And disposed at one corner of the cartridge body 102.
ing. The torsion spring 128 has a first arm.
Inner angle between the arm portion 128a and the second arm portion 128c
The obtuse angled, roughly-shaped state is defined as the natural state, and this natural state
Inner angles of these arm portions 128a and 128c are smaller than
The arms 128a and 128c are closed in a state where
As a result, the elastic force in the leg opening direction is increased. The disk cartridge B is a recording / reproducing device.
The shutter member is mounted on the shutter member.
Reference numeral 103 denotes a recording / reproducing opening 10 indicated by an arrow N in FIG.
When the slide operation is performed so as to open 9, 110,
The ride member 112 is a slide guide of the cartridge body 2.
Sliding along the recesses 114a and 114b.
You. The pinion gear 127 is formed by an arm of the torsion spring 128.
The second rack 12 so as to close the legs 128a.
6 to rotate and move the torsion spring 128
Increases elasticity. Also, the torsion spring 128
The twisting coil portion 128e is located outside the cartridge body 102.
Move to the side. The pinion gear 127 is connected to the torsion bar.
At the time of bending movement of the screw 128, one of the arm portions 128a
To the spring holder 129 with which the bent tip portion 128b of
To both racks 124, 126
It rotates smoothly. And the slide member 112
The shutter member 103 is moved to the recording / reproducing openings 109 and 110.
When the cartridge is moved in the direction to completely open the
The power of the slide guide recesses 114a and 114b of the body 102
Sliding movement to one side of cartridge body 102
And locked. The disk cartridge B is a recording / reproducing device.
From the torsion spring 128
Then, when the shutter member 103 is moved to the position indicated by the arrow M in FIG.
Slide to close playback openings 109 and 110
When operated, the slide member 112 moves the cartridge body.
Along the slide guide recesses 114a, 114b of 102
Slide operation. The pinion gear 127 is
The arm 128a of the spring 128 is opened.
And is rotated and moved with respect to the second rack 126. Ma
The torsion spring 128 is provided with a torsion coil portion 128e.
Moves toward the inside of the cartridge body 102. The pinion gear 127 is connected to the torsion bar.
At the time of bending movement of the screw 128, one of the arm portions 128a
To the spring holder 129 with which the bent tip portion 128b of
To both racks 124, 126
It rotates smoothly. And the slide member 112
The shutter member 103 is moved to the recording / reproducing openings 109 and 110.
Is moved in the direction to completely close the lock. By the way, the disk cartridge as described above
In the case B, one arm of the torsion spring 128 is
The bent portion 128b provided at the tip of the
Hooked on the spring engagement hole 129c of the screw holder 129.
The spring holder 12
9 easily comes out of the spring engagement hole 129c. this
Therefore, as shown in FIG.
Cover the arm portion 128a of the spring 128 from above.
Spring holding part 129d that presses
You. [0023] The present invention is constructed as described above.
The disc cartridge B is placed in the pinion gear 127.
The fitted spring holder 129 is inserted into the fitting hole 127a and the main body.
Pinion due to variation in dimensional accuracy with the part 129a
The rotation with respect to the gear 127 is not performed smoothly.
Condition arises. In this case, the spring holder 129 is
As shown by an arrow P in FIG.
The spring holder 129d.
U. Therefore, the arm portion 128 of the torsion spring 128
a is the pressing force of the spring holding portion 129d of the spring holder 129.
It will fall off even. Therefore, the torsion spring 1
28 is a bent portion 1 provided at the tip of the arm portion 128a.
28b from the spring engagement hole 129c of the spring holder 129
Sometimes they dropped off. Of the torsion spring 128
To drop from the spring holder 129, the shutter member 103
An urging force for urging the recording / reproducing opening 110 in a closing direction.
The function of the mechanism is lost, and recording / reproduction by the shutter member 103 is performed.
That the closed state of the opening 110 is not maintained
A point occurs. Therefore, the disk cartridge B is
The recording / playback opening 110 is always open,
When dust or the like adheres to the surface of the disc 101, the information signal is reproduced again.
Problems such as inability to reproduce and erroneous reproduction occur. Therefore, the present invention provides a torsion spring
By securely preventing falling off from the spring holder,
The shutter member securely closes the recording / reproducing opening to prevent dust
Disc cart that prevents entry and protects discs
It has been proposed for the purpose of providing a ridge. Means for Solving the Problems The present invention achieving this object
The disk cartridge according to the present invention has a signal formed on the main surface.
Disc with an information signal written on the signal recording surface and this disc
The disc is rotatably stored and the signal recording surface is
A recording / reproducing opening that faces outwards in the radial direction is provided.
Cartridge body that has been
Slide member slidably mounted on the side
And a recording / reproducing opening attached to the slide member.
The cartridge is slidably assembled so that it can be opened and closed.
The combined shutter member and one side of the slide member
A first rack provided in the section, and a pair with the first rack.
Second rack provided on the cartridge body side
And between the first rack and the second rack
Piniongi that can be rotated and moved by being meshed together
And a pin rotatably combined with the pinion gear.
Screw holder and the one extended from the center torsion coil.
The tip of the other arm engages with the engagement hole provided in the spring holder
And the tip of the other arm is
The cartridge body is engaged with a fulcrum formed on the body.
The shutter member is located at the corner
And a torsion spring for urging in a direction to close the part.
You. The spring holder has a torsion bar engaged with the engagement hole.
To the direction in which one arm of the
A first regulating means for regulating and an integral part of the first regulating means;
The arm part is formed in the state regulated by the first regulating means.
And second regulating means for holding the first regulating means.
The means is located above the engagement hole from the main surface of the spring holder.
Piece having a substantially L-shaped cross section having a locking portion projecting like an eaves
And the second restricting means includes a restricting piece.
Of the spring holder toward the main surface of the spring holder.
Inclined to the engaging hole side of the regulating convex portion and the regulating convex portion.
It is constituted by a guide inclined portion. The disk according to the present invention configured as described above
According to the cartridge, when not in use, slide
The member is biased by the pinion gear by the torsion spring.
The cartridge has been moved to the other side
The recording / reproducing opening is closed by the shutter member. A disk cartridge is used in a recording / reproducing apparatus.
When mounted, the shutter drive member on the recording / reproducing device side
The shutter member at the front edge of the cartridge body.
Is pressed along. The shutter member slides
To open the recording / reproducing opening. The disk cartridge has a sliding member.
Integral with the shutter member along the front edge of the cartridge body
When the first rack is moved,
From the above, the pinion gear in the engaged state is transferred to the second rack.
Move while rotating. The spring holder is pini
It moves together with the on-gear, and one of the torsion springs
The other arm is gradually closed to the arm.
The torsion spring must have the arms closed
The shutter member closes the recording / reproducing opening
The elastic force acting in the direction is urged. The torsion spring is moved with respect to the pinion gear.
In a state where the spring holder does not rotate smoothly due to tight fitting
Also, the engagement of the spring holder is performed by the first regulating means.
In addition to being restricted in the direction of exiting the hole,
Of the first regulating means by the regulating means
By being held, falling out of the spring holder is prevented.
It is. Therefore, the shutter member is provided with a torsion
The recording / reproducing opening is closed by the elastic force of the spring.
It is urged in the closing direction, and the recording / reproducing
The occurrence of inconvenience such as opening is prevented. Embodiments of the present invention will be described below with reference to the accompanying drawings.
This will be described in detail. Embodiment The disc cartridge A is shown in FIG.
As shown in FIG.
1 and a cartridge body 2 in which the disc 1 is stored
And a recording / reproducing opening provided in the cartridge body 2.
An opening / closing mechanism for opening and closing the openings 9 and 10;
A guide mechanism for transmitting power and a guide for this guide mechanism
To open and close the opening / closing mechanism toward the recording / reproducing openings 9 and 10.
And a biasing mechanism. This disc cartridge
The disk A is inserted from the front surface in the insertion direction to
Mounts and records or reproduces information signals on disc 1
Is performed. The cartridge body 2 is made of a predetermined material such as a synthetic resin.
Upper shell 4 and lower shell 5 formed of the above materials
Are butt-coupled. These upper and lower shells
The side walls 4b and 5b have substantially square shapes, respectively.
It protrudes along the periphery of the inner surfaces 4a, 5a. Ma
The inner surfaces 4a, 5a of the upper and lower shells 4, 5 are attached to each other.
A disk holder for receiving and holding the disk 1
Annular disk support walls 4c, 5c forming a holding portion project
Have been. The upper and lower shells 4 and 5 each have a middle front end.
From the vicinity of the center edge to the center,
For writing and reading information signals
Openings 9 and 10 are formed. These recording and playback
The openings 9 and 10 are provided at the center of the disk 1.
Formed on the main surface of the hub 11 and the disk 1 for locking.
The signal recording section of the cartridge body 2
It is formed in a size that can face outward. Outside the main surface portions 4a, 5a of the upper and lower shells 4, 5
On the side, shutter guide recesses 4d and 5d are
Step drop over one side including raw openings 9 and 10
Is formed. These shutter guide recesses 4d, 5d
Are provided with guide grooves 4e, 5e on the rear surface side.
You. The upper and lower shells 4 and 5 have a gap 1 in the front surface.
5 is obtained by cutting the front edges of the upper and lower shells 4 and 5.
Are provided. The upper and lower shells 4 and 5 have
A pair of slide guide recesses 14a, 14b
Facing the front edges of the upper and lower shells 4, 5
The cartridge body extends from the center of the edge to one side
2 protrudes toward the inside. A slide gear is provided on the inner surface 5a of the lower shell 5.
The gear portion support wall 30 is located inward of the
Project parallel to the slide guide recess 14b.
Have been. A lock member support is provided on the other side of the lower shell 5.
The holding pin 17 is substantially on the extension of the slide guide recess 14b.
It is located and provided. The lower shell 5 has a lock portion on the inner surface 5a.
Between the material support pin 17 and the slide guide recess 14b
And a lock arm support piece 18 is
You. In addition, the lock arm support piece 18
An elastic arm support wall 19 protrudes inward of the ridge body 2.
Has been established. The lock arm support piece 18 has a tip
A stop projection 18a is integrally provided. Also this locking
In a position below the protrusion 18a, so-called injection molding or the like is used.
The lower shell 5 has a locking projection 18a by the method
Locking projection 1
A relief hole 18b of a mold having a size corresponding to 8a is formed.
ing. Also, the lower shell 5 has a front side on one side.
A spring locking portion 31 is provided. The upper and lower shells 4 and 5 are
Boss parts 6 for screwing provided at predetermined places such as four corners
To the upper shell 4 corresponding to the screw bosses 6.
Set screw 8 is screwed in through provided screw insertion hole 7
And combined. The opening and closing mechanism is provided on one side of the cartridge body 2.
Slide member 12 slidably mounted on the surface
And a shutter member attached to the slide member 12.
3 and a slide member rotatably supported by the cartridge body 2.
And a lock member 16 for locking the guide member 12.
It is. The slide member 12 is shown by arrows in FIGS.
As shown by the mark S, this
Slidable in the direction along the front edge of the cartridge body 2
Supported by This slide member 12 is shown in FIGS.
As shown in the figure, the cross section is approximately
It is formed in a rectangular rod shape. The rear surface of the slide member 12 has a longitudinal direction.
A pair of slide guide recesses of upper and lower shells 4, 5 along
A pair of slide guide recesses fitted into 14a, 14b
Parts 12a and 12b are formed. Slide member 12
The front surface 12c has a pair of screw holes 12d and a pair of
A positioning protrusion 12f is provided. The sliding arm 12 has an engaging arm 1.
2e are recording / reproducing openings 9 and 10 of the cartridge body 2
It is formed to extend toward the side. This engagement arm 12
e, the engaging claw 23 is directed toward the inside of the cartridge body 2.
It protrudes from the side surface. Also, the slide member 1
The second engaging claw 23 has a side surface portion 23a having an engaging arm portion 12e.
Is inclined toward the tip side. Slide member 1
2 is a gap formed between the front edges of the upper and lower shells 4 and 5
15, a front side of the cartridge body 2
The part 12c faces outward. The shutter member 3 is formed by bending a thin metal plate.
And a pair of shutter plate portions 3a and 3b facing each other.
A connection for connecting one end to these shutter plate portions 3a, 3b
A substantially U-shape is formed by the plate portion 3c. This
The shutter member 3 includes shutter plate portions 3a and 3b, respectively.
The recording and reproducing openings 9 and 10 are formed in a size that can be closed.
ing. The shutter member 3 is provided in the gap 1 of the upper shell 4.
5 to the side surface 12c of the slide member 12 facing outward.
A pair of screw holes 12d are provided in the connection plate 3c.
The pair of screws 13 is inserted through the pair of screw insertion holes 3d.
By being screwed, it is attached to the slide member 12.
It is. At this time, the shutter member 3 is connected to the connecting plate 3c.
Slide member 12 into a pair of positioning holes 3f provided in
By inserting the positioning protrusion 12f of
It is positioned with respect to member 12. The shutter member 3 includes shutter plate portions 3a, 3a
b fits into guide grooves 4e, 5e of upper and lower shells 4, 5
Guides, and step formation on the main surfaces of the upper and lower shells 4 and 5
Operation on the shutter guide recesses 4d and 5d
Then, the recording and reproducing openings 9 and 10 are opened and closed. The locking member 16 is shown in FIGS.
A material with moderate flexibility and elasticity, such as synthetic resin
Support part 1 formed integrally with the material and formed in an annular shape
6a and on the outer peripheral surface side of the support portion 16a substantially in parallel with each other.
The lock arm 16b and the elastic arm 16 formed so as to protrude.
c. The lock member 16 has a support portion 16a having a lower shell.
Through a lock member support pin 17 protruding from the
And supported rotatably in the parallel direction of the cartridge body 2.
Have been. The lock member 16 has a lock arm 16b lower.
When it comes into contact with the lock arm support piece 18 of the shell 5
The elastic arm 16c is an elastic arm supporting wall of the lower shell 5.
19. At this time, the lock member 16
The direction in which the elastic arm 16c approaches the lock arm 16b
It is slightly elastically displaced. The lock member 16 is a lock
The arm 16b is caused by the elastic displacement of the elastic arm 16c.
Attached to the lock arm support piece 18 of the lower shell 5 by elastic force
The lower arm 5 of the lower shell 5.
It is urged by the holding wall 19. The lock arm 1 of the lock member 16B
6b, the lock member 16 and the cartridge are provided on the front surface side.
A locked groove 20 which constitutes a regulating means between the main body 2 is provided.
Have been killed. Also, on this front surface, the pressed operation protrusion is provided.
21 and an engagement recess 22 are provided. Locked groove 20
Is locked at a position corresponding to the lock arm support piece 18.
From the upper end of the arm 16b to the inside of this lock arm 16b
It is provided over the way. That is, the lock member 1
6 indicates that the lock arm 16b is a lock arm on the lower shell 5.
By being urged toward the memory support piece 18 side, the locked groove 20
The locking projection 18 of the lock arm support piece 18 is engaged with
You. The locking member 16 is engaged with the locking projection 18a.
In the state of being engaged in the stop groove 20, the locking projection 18a
Abuts against an inner wall portion on the lower end side in the locked groove 20.
As shown by an arrow R in FIG.
The movement in the direction perpendicular to is restricted. The pressed operation projection 21 of the lock member 16
It is formed in a substantially rectangular shape, and the other end of the gap 15 and the
The connection plate 3 of the shutter member 3 corresponding to the pressure operation projection 21
c through the insertion hole 3e provided in the cartridge body 2
Facing the outside. This pressed operation projection 21 is
A predetermined shutter drive member on the playback device comes into contact with the shutter
As shown by the arrow Q in FIG.
6b is provided on the inner side of the cartridge body 2 with a lock member support pin.
This is for rotating operation around the center 17. What
The distal end surface 21a of the pressed operation projection 21 is locked.
When the arm 16b is rotated by a predetermined angle, the cart
There will be no inclination with respect to the front side of the ridge body 2
As shown in FIG.
I have. The engaging recess 22 is formed as shown in FIG.
Then, the lock arm 16b contacts the lock arm support piece 18.
In the contact state, the engaging claw 23 of the slide member 12
Relative engagement. That is, the lock arm 16b is
When the engaging recess 2 is in contact with the
2 is engaged with the engaging claw 23 of the slide member 12, and
The sliding operation of the sliding member 12 is restricted. At this time,
The shutter member 3 is configured such that the shutter member 3 has the recording / reproducing opening 9,
10 is locked in a closed state. Then, as shown in FIG.
Reference numeral 6 denotes an operation for rotating the cartridge body 2 inward.
, Lock arm 16b engaging recess 22 and slide member 1
2 is released from the engagement state with the engagement claw 23, and the slide member
12 is slidable. The shutter member 3 is a cart
Can be slid freely on the ridge body 2 for recording and playback
The openings 9, 10 can be opened and closed freely. The tip of the engaging recess 22 of the lock arm 16b
As shown in FIG. 6, the inner wall portion 22a on the side
This engagement corresponds to the side surface portion 23a of the engagement claw 23 of FIG.
The inner side is larger than the entrance of the recess 22.
It is slightly inclined. Engagement recess 22 of lock member 16
The engagement claws 23 of the slide member 12 are engaged with each other.
The lock member 16 is rotated in the
Slide member 12 is separated from lock member 16
Even if you try to slide in the direction
It is prevented from being released. By the way, in the engagement concave portion 22,
As shown in FIG. 4, the lock member 16 and the slide member 12
Is provided with a locking piece 25 serving as a regulating means.
The locking piece 25 closes the upper side of the engagement recess 22.
Thus, it is formed integrally with the lock arm 16b. This
The locking piece 25 of the lower shell 5
Is moved away from the inner surface 5a in a direction perpendicular to
If it is attempted to contact the upper surface of the engaging claw 23,
The dowel 23 is locked. The guide mechanism, as shown in FIG.
A first rack 24 fixed to the
Of the main body 2 fixed on the inner surface 5a of the lower shell 5.
And two racks 26. The first rack 24 has a slide guide recess.
14b, at a position inside the cartridge body 2,
On the other hand, a pair of slide guides on the side
It is fixed to the side surface on the side of the concave portions 12a and 12b. First
The gear part is provided on the other side of the rack 24
The sliding of the slide member 12 is directed toward the inside of the main body 2.
It is formed along the direction. The first rack 24 is
As shown in FIG. 8, the lower shell 5 protrudes from the inner surface 5a.
The gear portion support wall 3 is supported by the gear portion support wall 30.
0 and slide in parallel with the slide guide recess 14b.
Id is operated. The second rack 26 is provided on the inner surface of the lower shell 5.
5a, one peripheral edge of the recording / reproducing opening 10 is set as a starting end.
Facing the first rack 24 at a position over one side
And slide the slide guide parallel to the slide guide recess 14b.
It is fixed at a predetermined interval from the recessed portion 14b.
The rack 26 has a gear portion having a slide guide recess 14b.
Side and along the sliding direction of the first rack 24
It is formed. The urging mechanism includes a pinion as shown in FIG.
Gear 27, spring holder 29, torsion spring 28
It is composed of The pinion gear 27 is shown in FIGS.
As shown, the first rack 24 and the second rack gear 26
The first rack 24 and the second rack are interposed between
The gear 26 is rotated by the gear 26 and moves. Piniongi
The spring 27 is rotatably mounted on the lug 27.
A hole 27a is provided. Furthermore, in this fitting hole 27a
Is a length dimension that covers approximately 90 ° in the circumferential direction.
An engaging projection 27b protruding in a fan shape having
It protrudes integrally. The spring holder 29 is a cylinder formed integrally.
The main body 29a having the shape is fitted to the fitting hole 27a of the pinion gear 27.
And rotate it about 90 °
The main body 2 is supported rotatably in the axial direction with the on-gear 27.
9a is formed with a pinion gear
27 is slidably contacted with the upper surface side. This body
The outer diameter of the pinion gear 29a is within the fitting hole 27a of the pinion gear 27.
It is formed in a size substantially equal to the diameter. This disk part 2
9b has an outer diameter substantially equal to the outer diameter of the pinion gear 27.
Has been established. The spring holder 29 includes a main body 29a.
On the lower surface of each, extending over a range of approximately 90 ° in the circumferential direction.
Spring holder formed in a fan shape with a height dimension
An engaging projection 29g is provided integrally. Also,
The torsion bar is provided at the center of the main body 29a.
An engagement hole 29c for engaging the tip of the screw 28 is provided.
You. The spring holder 29 has a main body 29a.
A restricting piece 29d is provided integrally on the upper surface of the. Regulation piece
29d is engaged from the main surface of the main body 29a of the spring holder 29.
The locking portion that is located above the mating hole 29c and protrudes like an eave
It has a substantially L-shaped cross section. At the tip of the regulating piece 29d, the disc 29b
A regulating convex portion 29f is integrally formed toward the main surface side.
You. The restricting convex portion 29f is connected to the torsion bar from the disk portion 29b.
The screw 28 has a predetermined height so as not to fall out in the parallel direction.
You. In addition, between the regulating protrusion 29f and the regulating piece 29d,
Has a space with a width slightly larger than the diameter of the torsion spring 28
I do. The restricting projection 29f has an engaging hole 29c.
Guide inclined portion 29e inclined toward the side is provided.
Have been. The torsion spring 28 has a torsion
File portion 28e, one arm portion 28a, and the other arm portion 28a.
And a memory portion 28c. The torsion spring 28 is located at the center
Torsion coil portion 28e on the inner side of cartridge body 2.
, Extending from this torsion coil portion 28e
The bent end portion 28b of the arm portion 28a is
Is engaged with the engagement hole 29c provided in the
The bent end portion 28d of the rubber portion 28c is formed in the cartridge body.
The cartridge is engaged with one of the
It is arranged in the na section. The position of the torsion coil portion 28e is
Open for recording / reproduction in the direction parallel to the main surface of the cartridge body 2.
It changes to the mouth 9 and 10 side. Arms 28a, 28c
Is a natural state in which the inside angle is obtuse and the approximate angle is a letter.
And these arm portions 28a, 2
When the leg is closed in a state where the inner angle of 8c is small, the bullet in the open leg direction
It is elastically displaced so as to have a sexual force. Torsion bar
The thread 28 records and reproduces the shutter member 3 by this elastic force.
The raw openings 9 and 10 are urged in the closing direction. The disk drive of the embodiment constructed as described above
When the cartridge A is not in use, the shutter member 3 is closed.
The recording / reproducing openings 9 and 10 of the cartridge body 2 are closed.
When the slide member 12 is in the pinion gear
The slide gear is biased by the torsion spring
End of recording / reproducing openings 3 and 4 of guide recesses 14a and 14b
Part, and the engaging claw 23 of the slide member 12 is locked.
The shutter member 3 is engaged with the engagement recess 22 of the shutter member 16.
Lock in the closed state to prevent unnecessary release of the
I have. This disc cartridge A is
When mounted on a recording / reproducing device from the
The pressing member constituting the shutter opening / closing mechanism is a shutter member 3
Into the through hole 3e provided on the front surface side of the
Arm 1 of lock member 16 for locking lock member 3
6b is pressed, and the engagement claws 23 of the slide member 12 are locked.
The engagement member 22 is disengaged from the engagement recess 22 and
The shutter member 3 has a recording / reproducing opening indicated by an arrow N in FIG.
The pressing operation is performed in a direction to open the parts 9 and 10. As described above, the disk cartridge A is
When the shutter member 3 is pressed, the slide member 12 is moved.
Slide guide recesses 14a, 14 of cartridge body 2
The slide operation is performed along b. Disk cartridge A
When the slide member 12 is slid, the first
Since the lock 24 is also moved integrally, it is in an engaged state.
Rotate the pinion gear 27 with respect to the second rack 26
While moving. The spring holder 29 is a pinion gear 2
7 and one arm of the torsion spring 28
The other arm portion 28a is gradually closed with respect to the portion 28c.
State. The torsion spring 28 has an arm 28a.
When the legs are closed, the shutter member 3 is re-recorded.
The elastic force acting in the direction to close the raw openings 9 and 10
Be energized. In this state, the torsion spring 28
The gear 27 is moved during the sliding operation of the slide member 12.
Since it only reaches approximately half the position, the cartridge body 2
Only bends and moves to the substantially central portion of the corner portion. I
Accordingly, the torsion spring 28 is attached to the cartridge body 2.
Screw boss located on one side of the corner
It does not cross section 6. The torsion spring 28 has a pinion gear 27
Of the spring holder 29 body portion 29a with respect to the fitting hole 27a of
Even in a state where it cannot be rotated smoothly due to tight fitting,
The restriction piece 29d of the screw holder 29 allows the spring holder 29
Is restricted in the direction of coming out of the engagement hole 29c.
In addition, the torsion spring 28 is a restricting projection of the spring holder 29.
The part 29f keeps the state regulated by the regulating piece 29d.
As a result, the spring holder 29 is
Prevents falling off from spring holder 29
It is. Therefore, the shutter member 3 is
Opening for recording / reproducing by the elastic force of the spring 28
Energized in the direction to close parts 9, 10 and recorded when not in use
Inconvenience such as opening of the opening for reproduction 9, 10
Life is prevented. Thus, the disc cartridge A
Means that the shutter member 3 secures the recording and reproducing openings 9 and 10
The disk 1 is protected from dust, etc.
Is achieved. As described in detail above, according to the present invention,
According to the disk cartridge, the engagement hole is formed in the spring holder.
One arm of the torsion spring engaged with the
The main surface of the spring holder that regulates the direction of exit from
A locking portion that is located above the engagement hole and protrudes like an eave.
A first rule constituted by a restricting piece having a substantially L-shaped cross section
Control means and an arm integrally formed with the first control means.
Of the restricting piece for holding the portion in the restricting state by the first restricting means.
Projected integrally from the tip toward the main surface of the spring holder
Of the restricting convex portion and the engaging convex portion of the restricting convex portion.
Second regulating hand constituted by the inclined guide portion
By providing the step, the spring holder and the pinion gear
Fit into pinion gear due to variation in dimensional accuracy of
If the spring holder does not rotate smoothly
The holding state of the arm of the torsion spring is
It is. Therefore, the disk cartridge
The spring arm is securely prevented from falling off the spring holder.
The shutter member secures the recording / reproducing opening.
To prevent dust from entering and protect the disc.
It is planned. The torsion spring arm is extremely simple.
It can be simply engaged with the engagement hole of the spring holder,
Incorporation of the spring is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a disk cartridge according to the present invention. FIG. 2 is a plan view of the disk cartridge. FIG. 3 is an enlarged perspective view of a slide member of the disk cartridge. FIG. 4 is an enlarged perspective view of a lock member of the disk cartridge. FIG. 5 is an enlarged plan view showing an engagement state between a slide member and a lock member of the disk cartridge. FIG. 6 is an enlarged plan view showing a disengaged state between a slide member and a lock member of the disk cartridge. FIG. 7 is an enlarged plan view of a shutter urging mechanism of the disk cartridge. FIG. 8 is an enlarged plan view showing a state where a shutter member of a shutter urging mechanism of the disk cartridge has moved. FIG. 9 is an enlarged perspective view of a pinion gear and a spring holder of a shutter urging mechanism of the disk cartridge. FIG. 10 is a vertical sectional view of a spring holder of a shutter urging mechanism of the disk cartridge. FIG. 11 is an enlarged plan view of a shutter urging mechanism of a conventional disk cartridge. FIG. 12 is an enlarged plan view showing a state where a shutter member of a conventional shutter urging mechanism of a disk cartridge has moved. FIG. 13 is an enlarged perspective view of a pinion gear and a spring holder of a shutter urging mechanism of a conventional disk cartridge. FIG. 14 is a longitudinal sectional view of a spring holder of a conventional shutter urging mechanism for a disc cartridge. DESCRIPTION OF SYMBOLS 1 Disc 2 Cartridge main body 3 Shutter member 9 Recording / reproducing opening 10 of upper shell 10 Recording / reproducing opening 12 of lower shell 12 Slide member 24 First rack 26 Second rack 27 Pinion gear 28 Torsion spring 28a One arm part 28c The other arm part 28e Torsion coil part 29 Spring holder 29c Engagement hole 29d Regulation piece 29f Regulation convex part

Claims (1)

(57) [Claim 1] A disc on which an information signal is recorded in a signal recording section, and the disc is rotatably housed, and the signal recording section is disposed radially outward. A cartridge body provided with a recording / reproducing opening to be exposed, a slide member slidably mounted on one side of the cartridge body, and a recording / reproducing opening which is attached to the slide member to open and close. A shutter member slidably combined with the cartridge body, a first rack provided on one side surface of the slide member, and a second rack provided on the cartridge body side facing the first rack. A pinion gear interposed between the first rack and the second rack and meshed with the pinion gear so as to rotate and move; The tip of one arm part extended from the torsion coil part at the center is engaged with the engagement hole provided in the spring holder, and the tip of the other arm part is formed on the cartridge body. A torsion spring that is engaged with the fulcrum and disposed at one corner of the cartridge body and urges a shutter member slid in a state where the recording / reproducing opening is opened in a direction to close the recording / reproducing opening. The spring holder includes a first restricting means for restricting one of the arm portions of the torsion spring engaged with the engaging hole in a direction of coming out of the engaging hole, and an integral part of the first restricting means. And a second restricting means for holding the arm portion in a restricting state by the first restricting means.
A cross-section with a locking portion protruding like an eaves located at the upper part
The second restricting means is formed by an L-shaped restricting piece.
A restricting projection integrally projecting toward the main surface of the
Guide inclined toward the engagement hole side of the control projection
A disk cartridge characterized by comprising a unit .