CN1006742B

CN1006742B - Shutter mechanism for disk enclosures

Info

Publication number: CN1006742B
Application number: CN 85106039
Authority: CN
Inventors: 中西宏
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 1985-08-12
Filing date: 1985-08-12
Publication date: 1990-02-07
Also published as: CN85106039A

Abstract

An aperture shutter mechanism for a disk cartridge having a shutter for covering or uncovering an aperture through which a magnetic recording medium can be accessed; (b) a first means for holding the shutter in a closed position in which the window is concealed; (c) means for releasing the shutter held by the first means in the closed position when the disc cartridge is loaded in the recording/reproducing apparatus; (d) and third means for generating and storing a biasing force when the disk cartridge is loaded into the disk cartridge recording/reproducing apparatus, the third means releasing the shutter to open the window hole in accordance with the loading operation of the disk cartridge by the stored biasing force immediately before the second means releases the shutter from the closed position.

Description

Shuttering mechanism for a cassette

The present invention is relevant with disk cartridge (cassette) gate mechanism, particularly relates to a kind of require not have in the disk cartridge strict dimensional accuracy and the gate mechanism of special entity.When disk cartridge when the box frame takes off, this gate is automatically moved on the position of closing, and can not damage disk cartridge.

Owing on the recording medium of disk and so on, dust or finger greasy filth are arranged after accumulation on the recording surface, usually can not recording playback, so just disk is collected in the box, the anti-pollutant that unloads is infected with on the record magnetic surface.In addition, at record and playback time, record/put magnetic head and contact with disk by a fenestra on the box.And, be one to prevent that dust and so on from entering disk cartridge by fenestra, and prevent that finger from contacting with magnetic disk surface by fenestra, on disk cartridge, increased a gate, in order to opening or to close fenestra, thereby gate is in the open site when using disk cartridge, makes to record/put magnetic head can contact disk.

If yet disk cartridge is not being had closed shutter as the operator when the box frame takes off, just gate does not play it and answers role so.

In traditional gate mechanism, a spring is arranged on the box, to the position of closing, when disk cartridge being put into box frame work record magnetic or playing, gate is being resisted the power of spring and is being opened the gate top.When disk cartridge when the box frame takes out, gate is butted on the power of spring and closes automatically.

Yet this has disadvantage, because the spring handle gate heads on towards off-position, has increased the size and the weight of the disk cartridge of the recording/playback device that is used for the little and light weight of body.And the extra parts of installation have increased the cost of making this disk cartridge on disk cartridge.Because disk cartridge large-scale production, and a large amount of use, so just can cause loss on the great profit even increase cost a little.

And on the other hand, the clear 51-23 that " Japanese patent gazette " of publishing on July 15th, 1976 announced, in No. 167 patents, proposed another gate mechanism, a fork has been installed in the disk cartridge frame, when an end of fork is promoted by disk cartridge, an other end just is pushed towards disk cartridge and rotates, insert in the groove on the gate, when movable, just open automatically or close by gate in the box frame for later disk cartridge.

But this gate mechanism has shortcoming, because be difficult to the timing of control fork free end to the magnetic holder swing, even timing has small error slightly, an end of fork or the other end will slide on the disk cartridge housing and abrade housing.Because the housing of disk cartridge is generally used the synthetic resin manufacturing, the toner that the fork friction causes can be piled up on recording/playback device.This powder can enter disk cartridge later, encloses on the record magnetic surface of disk.

Consider the unfavorable and shortcoming of narrating above, an object of the present invention is to propose a kind of disk cartridge fenestra gate mechanism, this disk cartridge not be used in special device is set on the disk cartridge, just can be when disk cartridge be taken out from the box frame, on the position that gate is closed along with reaction is automatically moved to.This error free manipulation does not need strict dimensional accuracy, can not damage disk cartridge yet.

In order to reach this purpose, gate mechanism has following device: (a) gate that fenestra is covered or opens can contact recording medium in the disk cartridge by this fenestra; (b) first device that gate is maintained in its closed position, gate covers fenestra on this position the time; (c) second device, when disk cartridge being put into a disk cartridge recording/playback device, gate is unclamped from the off-position that first device keeps, (d) when disk cartridge is put into the disk cartridge recording/playback device, there is the 3rd device to produce a biasing force, and this power storage, and before second device is about to by the biasing force that stores gate unclamped from the position of closing and gate mesh, along with the action of putting into disk cartridge, push gate open and expose fenestra, above-mentioned the 3rd device has the engaging hole that forms on gate, there is a closing gate spare rotatably to be installed on the disk cartridge frame, first end of closing gate spare and engaging hole engagement, second end is oppressed disk cartridge when disk cartridge is put into the disk cartridge frame, send the biasing force of storage, first end towards the disk cartridge bias voltage, before above-mentioned pawl is about to leave above-mentioned otch, the engagement of the engaging hole of first end and gate.

Disk cartridge gate mechanism of the present invention has a gate, a fenestra is covered or opening, so that boxlike record magnetic medium can be touched, and a locking device arranged, on the maintenance gate is in the closed position, because this gate mechanism has the device that uncages, when disk cartridge is put into the box frame, the device that uncages unclamps gate from locking device, there is an elasticity closing gate device to be rotatably installed in the box frame, first end of closing gate device and the engagement of the engaging hole on the gate, second end is oppressed disk cartridge when disk cartridge is put into the box frame, send a power, towards meshing bias voltage with first engaging hole, the power of bias voltage makes first end before the device that uncages will soon unclamp gate, makes the engaging hole engagement of first end and gate first end, therefore need not establish in disk cartridge and put spring and just can take out disk cartridge from the box frame, gate can be closed automatically.Moreover, device is flexible owing to uncage, and the biasing force that disk cartridge and closing gate device second end in contact are produced is stored by the form with the device elastic deformation of uncaging, overlap up to the engaging hole of first end and gate, thereby the disk cartridge device that can not uncaged is worn.

Because the engagement of first end and gate engaging hole, so when disk cartridge taken out from the box frame, gate was closed fully, in addition also like this when disk cartridge is not put into the box frame fully and just disk cartridge taken out.

Just can do more comprehensively to understand to the present invention in conjunction with the accompanying drawings from following narration, component part identical in the accompanying drawing represents that with identical number accompanying drawing thes contents are as follows:

Fig. 1 is for implementing the plan view of a disk cartridge biopsy cavity marker devices of the present invention;

Fig. 2 is Fig. 1 disk cartridge back side plane view;

Fig. 3 is the end view drawing of Fig. 1 and Fig. 2 disk cartridge;

Fig. 4 is for implementing disk cartridge frame front elevation of the present invention;

Fig. 5 is Fig. 4 disk cartridge major part part section enlarged drawing;

Fig. 6 is the box frame plan view among Fig. 4 and Fig. 5;

Fig. 7 (A) is to 7(E) be the cut-open view of the embodiment major part among Fig. 1 to Fig. 6, explain the running of disk cartridge gate mechanism of the present invention.

For the ease of understanding the present invention, with the connection with figures explanation.

At first referring to figs. 1 through the structure of the described disk cartridge of Fig. 3.

The disk cartridge of label 1 expression among Fig. 1 to 3 has a box frame 2 made from synthetic resin, wherein fills rotatable disk 3.The central cores of numbers 4 expressions and disk 3 center fixation.Engaging hole 5 be arranged in central cores 4 in the heart.Central cores 4 is exposed by the medium pore 6 at disk cartridge frame 2 centers.

Label 7,7 ' expression is near the forward and backward fenestra of box frame 2 upper limbs, and disk 3 can be by these two hole contacts.Label 8 expression is used for hiding or open fenestra 7,7 ' gate.Gate 8 foil manufacturing, doubling is two parallel plates on the coboundary of box frame 2.Have along the top of box frame 2 both sides two narrow grooves 9,9 ', separation fenestra 7,7 ' both sides, hold gate 8.Gate 8 is installed on the box frame 2, can be free along shallow slot 9,9 ' slip.The tongue piece that cuts out on the upper limb on a surface of label 10,10 ' be illustrated in gate 8 forms sliding part.Label 11 expressions are parallel to the guide groove of box frame 2 coboundarys, and sliding part 10,10 ' embedding guide groove inside slides.Label 12 is illustrated in another piece tongue piece that cuts out on gate 8 coboundarys and the pawl that forms.Label 13 is gate blocking levers made from half elastic synthetic resin.Gate blocking lever 13 is installed near the coboundary of box frame 2, and its lower end is fixed on the pivot of box frame 2.In addition, on the upper limb of blocking lever 13, make one and connect otch 14.When gate 8 moves on the off-position, the pawl 12 of gate 8 be connected otch 14 and connect, gate 8 moved on the off-position lock.The connection otch 14 of gate blocking lever 13 has hypotenuse, and convenient gate 8 moves to off-position, and prevents to move in the opposite direction.

When gate 8 from the release position when off-position moves, the wedge shape dirt end 15 of blocking lever 13 is against the lower limb of pawl 12, when gate blocking lever 13 because its toughness when rotating, guarantees to connect otch 14 and is connected with pawl 12.In addition, as soon as pawl 12 be connected otch 14 and connect after, just need certain other device, the dirt end of gate blocking lever 13 is bent downwardly, braking is spread out 12 from connect otch 14, frees.And the upper surface 16 of the gate blocking lever 13 relative with dirt end 15 has the angle that favours box frame 2 coboundarys.

Fig. 4 to Fig. 6 illustrates the structure of box frame.

In Fig. 4, the bound edge of the box frame of a number recording/playback device (not shown) of 17 expressions forms

guide groove

18,19, stretches to both sides separately on the upper and lower edge of box frame 17.Disk cartridge 1 is placed in the box frame 17, makes disk cartridge 1 when packing into and take out, upper limb and lower edge are respectively along sliding in the

guide groove

18,19.

Device that uncages of label 20 expressions stretches out downwards from the coboundary 18a of upper rail 18.

When disk cartridge 1 is put into box frame 17 reposefully, the device 20 that uncages is pressed on the inclined surface 16 of gate blocking lever 13 of disk cartridge 1, because being bent downwardly of gate blocking lever 13 (referring to Fig. 7 (D)), the pawl 12 of gate 8 from blocking lever 13 connect the otch 14 and break away from.The leading edge 20a of device 20 is against the leading edge of gate 8 so uncage.Then when further inserting in the box frame 17, because the effect of the device 20 that uncages, gate 8 has been shifted onto release position get on (referring to Fig. 7 (E)) to disk cartridge 1.

The closing gate spare that label 21 expressions are made with a kind of elastic force or resilient material.Support member 22 bendings are stretched downwards from the center at closing gate spare 21 edges.From support member 22, pass aperture 23, be enclosed within on the little projecting point 24 that forms on guide groove 18 both sides.Like this, closing gate 21, can be near box frame 17 coboundarys one freely rotate in by a small margin.

An engagement tongue piece 25 is arranged, stretch out downwards from 21 1 free ends of closing gate spare.Stretch into the slotted eye 26 of engagement tongue piece 25 from guide groove 18 coboundarys.

The opposite side of pivot is being stretched on another free end of 21 with engagement tongue piece 25 relative closing gates, and the end is bent downwardly slightly, passes through the otch 27 from guide groove 18 coboundary 18a, stretches into guide groove 18.The end dirt 28 of the other end of closing member 21 curves circular arc, forms a surface in contact.

Pad of label 29 expressions gos deep in the disk cartridge frame 17.Pad 29 and biasing device (not shown) cooperate, and disk cartridge 1 is extruded from box frame 17.

For the operation of above-mentioned gate mechanism, be described herein as follows with reference to Fig. 7 (A) to Fig. 7 (E) now:

At first, when disk cartridge 1 is put into disk cartridge frame 17 (referring to Fig. 7 (A), the contact jaw 28 of closing gate spare 21 leans against in the inclination of disk cartridge frame 2 on the interior angle 30, when disk cartridge when mobile inwards, contact jaw 28 along with inclined surface 30 to rise (referring to Fig. 7 (B)).

Though the front end of closing gate spare 21 is pressed towards down, that end of closing gate spare 21 is just compacted on this direction, because engagement tongue piece 25 closely contacts with the coboundary 8a of gate 8.

When disk cartridge 1 continuation is mobile inwards (to the right side of Fig. 7), before the pawl 12 of closing gate spare 21 was about to break away from from the connection otch 14 of blocking lever 13, the engagement tongue piece 25 of closing gate spare 21 fell into the engaging hole 31 on the gate 8.Be added in the biasing force on the closing gate spare 21, make engaging hole 31 secure engagement (referring to Fig. 7 (C)) of engagement tongue piece 25 and gate 8.

The device 20 that uncages then moves to open site get on (referring to Fig. 7 (E)).Though should be noted that the power of the bias voltage that can utilize pad 29, disk cartridge 1 is bound on the position of taking-up, unless there is other device (not shown) order to take out disk cartridge, the power of bias voltage can not be added on the magnetic record box 1.

If be that disk cartridge 1 is taken out from box frame 17, the operation steps of gate 8 just and disk cartridge 1 is put into box frame 17 on the contrary so.That is to say: earlier on the position of closing that disk cartridge 1 is moved from the position of opening (this position is shown in Fig. 7 (E)), the engagement tongue piece 25 that the engaging hole 31 with gate 8 is meshed is moved gate 8 to (shown in Fig. 7 (D)) on the position of closing.Then, after being connected otch 14 and connecting of the pawl 12 of gate 8 and gate blocking lever 13.Shown in Fig. 7 (C), the end of engagement of closing gate spare 21 is bent upwards, and the engaging hole 31 on engagement tongue piece 25 and the gate 8 is broken away from, and should be noted that engagement tongue piece 25 is triangle, and engagement tongue piece 25 and engaging hole 31 can be broken away from smooth-goingly.

Like this, disk cartridge 1 just can take out from box frame 17, gate 8 by blocking lever 13 remain on hide fenestra 7,7 ' the position on.Should be noted that: though the biasing force that disk cartridge 1 is stored in the pad 29 ejects to the direction of taking out, disk cartridge 1 rests on 7(C) shown in the position on because the engagement tongue piece 25 of closing gate spare 21, also and the engaging hole 31 of gate 8 mesh.So the operator can catch the part of the disk cartridge 1 that stretches out box frame 17, disk cartridge 1 is taken out.

Like this, even the biasing force that pad 29 is applied on the disk cartridge 1 is sizable words, disk cartridge 1 can not ejected from box frame 17 fully yet.

Moreover in case disk cartridge is put into the box frame fully, even gate has only been opened half, but when disk cartridge was taken out from the box frame, because closing gate spare and engaging hole engagement, gate just can be closed fully.

Should be noted that in, only narrated the application of gate mechanism on disk cartridge, but the present invention can be widely used in any gate mechanism that the disk cartridge of gate is arranged embodiment recited above of the present invention.

The people who is skillful in one's own profession skill can arrive by clear understanding, top explanation is that preferred embodiment is a foundation, can also make variations and modifications and not depart from the scope of the present invention, the claim project of setting range of the present invention after referring to literary composition.

Claims

1. A disk box gate mechanism has the following components:

(a) a gate (8) that covers or opens a window (7, 7') through which the magnetic recording medium (3) of the disk cartridge (1) can be contacted;

(b) There are first means for maintaining said gate (8) in a closed position, in which position the apertures (7, 7') are covered.

(c) There is a second device for releasing the gate (8) clamped by the first device from the closed position when the disk cartridge (1) is put into a disk cartridge recording/reproducing device;

(d) There is a 3rd device, when disk cartridge (1) is put in above-mentioned disk cartridge recording/reproducing device, produce a biasing force, and store this force; When above-mentioned second device is about to pull above-mentioned gate (8) from Before being released in the closed position, the third device engages with the above-mentioned gate (8), through the force of the above-mentioned stored bias, along with the action of putting the disk cartridge (1), the above-mentioned gate (8) is sent to the opening window The position of (7, 7') goes up, and it is characterized in that the above-mentioned third device has an engaging hole (31) formed on the gate (8), and a gate closing member (21) is installed on the disk cartridge frame in a rotatable manner. (17), the first end of the gate closing member (21) engages with the engagement hole (31); the second end presses the disk cartridge (1) when the disk cartridge (1) is put into the disk cartridge holder (17), and sends out The stored biasing force biases the first end toward the disk cartridge (1), and the first end engages with the engaging hole (31) of the gate just before the above-mentioned brake pawl (12) leaves the above-mentioned cutout (11).

2. The gate mechanism as claimed in claim 1, characterized in that said first device has a brake pawl (12) formed on said gate (8), a gate lock lever (13) with a A cutout (14) is provided for the above-mentioned brake pawl (12) to be received, and the interlock lever (13) is rotatably mounted on the disk case (1).

3. The gate mechanism as claimed in claim 2, characterized in that said second device has a protruding portion (20) formed on said disk cartridge frame (17) to press said gate interlocking lever (13), when the disk When the box (1) was put into the disk box frame (17), the above-mentioned brake pawl (12) was loosened from the above-mentioned notch (14).

4. A gate mechanism as claimed in claim 1, characterized in that said gate closing member (21) is formed of elastic material.

5. A gate mechanism as claimed in claim 1, characterized in that said gate closing member (21) has a triangular tongue (25) protruding towards the disk cartridge (1).