JPH0249503B2 - JIKISHIITOSOCHI - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a magnetic sheet device in which a magnetic sheet is rotatably housed in a jacket, and in particular a shutter for opening and closing a window provided in the jacket is slidable. Regarding those attached to.

<Prior Art> Conventionally, magnetic sheets are constructed by depositing a magnetic recording layer on a thin film sheet, and are therefore fragile and extremely susceptible to damage.
In particular, if the magnetic recording layer is damaged, signals may be lost during recording and/or reproduction, making it impossible to obtain good recording and reproduction characteristics.

Therefore, in order to protect the magnetic sheet, which is fragile and easily damaged, and to make it easier to handle and store, the magnetic sheet is stored in a jacket and attached to a magnetic recording/reproducing device while stored in this jacket. A magnetic sheet device has been proposed that enables this.

In conventionally proposed magnetic sheet devices, a jacket in which a magnetic sheet is rotatably housed is provided with a window portion that exposes at least the signal recording surface of the magnetic sheet outward in the radial direction, and the window portion is opened and closed. It is constructed by attaching a shutter that can be slid freely.

The shutter is biased in the direction of closing the window by the elastic restoring force of the spring member built into the jacket and closes the window, preventing dust from entering the jacket and damaging the magnetic sheet. It is configured to prevent exposure to In addition, when the magnetic sheet device is inserted into a predetermined mounting section in a magnetic recording/reproducing device, this shutter is engaged with a shutter opening/closing pin provided on the device side, and is further spring-loaded by the insertion operation into the mounting section. The window portion is opened by sliding in the direction of opening the window portion against the biasing force of the member.

As described above, a magnetic sheet device is provided in which a shutter slidably attached to a jacket is elastically biased by a spring member attached to a rotating jacket to close a window provided in the jacket. Accordingly, the shutter can be slid to open and close the window of the jacket in connection with loading and unloading the magnetic recording/reproducing device.

<Problems to be Solved by the Invention> In the magnetic sheet device configured as described above, the shutter simply closes the window of the jacket only by the biasing force of the spring member. Therefore, the sliding operation may be easily performed and the window portion may be opened inadvertently. Furthermore, it is not possible to sufficiently protect the magnetic sheet housed in the jacket.

SUMMARY OF THE INVENTION Accordingly, the present invention securely holds the shutter for closing the window provided in the jacket in the closed position of the window, sufficiently protects the magnetic sheet housed in the jacket, and also prevents the opening of the shutter. This was proposed for the purpose of providing a magnetic sheet device that can be operated smoothly and easily.

<Means for Solving the Problems> In order to solve the problems of the above-mentioned conventional products and achieve the above object, the present invention provides a jacket in which a magnetic sheet is rotatably housed. A locking member is provided in the jacket to lock a shutter for opening and closing the window in the closed position of the window, and the locking member has an engaging portion that engages with an engaging piece provided on the shutter. Slanted portions are provided on both sides of the shutter so that the shutter closing member can smoothly press the locking member in the escape direction.

<Function> The magnetic sheet device according to the present invention, when the shutter reaches the position where the window provided in the jacket is closed,
An engaging piece provided on the shutter engages with a locking member provided within the jacket and is locked.

Furthermore, when the magnetic sheet device with the shutter locked is attached to the mounting section of the magnetic recording/reproducing device, the shutter opening member provided on the device side opens the shutter engaging piece provided on the locking member. One of the inclined parts provided on both sides of the engaging part with which the lock member engages is pressed, and the locking member is pressed and displaced in the direction of releasing the engagement with the engaging piece part. Specific embodiments of the invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the magnetic sheet device according to the present invention has a disk-shaped magnetic sheet inside a jacket 1 which is constructed by butting and joining a pair of upper and lower halves made of synthetic resin or the like. The seat 2 is rotatably stored. The jacket 1 containing the magnetic sheet 2 is formed to be small enough to be held in the palm of the hand.

Further, a center core 4 is attached to the rotational center of the magnetic sheet 2, into which a rotational drive shaft provided on the side of a magnetic recording/reproducing apparatus that rotates the magnetic sheet 2 is inserted and engaged. This center core 4 has a drive hole 3 in the center for engaging the rotational drive shaft.
is formed, and when the magnetic sheet 2 is housed in the jacket 1, it faces so as to engage with the central opening 5 provided in the jacket 1. moreover,
A display mechanism 6 is provided at the rear end corner of the jacket 1 for displaying the number of annular recording tracks formed on the magnetic sheet 2 by recording a predetermined video signal. As shown in FIG. 2, this display mechanism 6 includes a disc-shaped dial display member 8 having a keyhole-shaped display hole 7, and a rotating gear 9 integrally attached to this dial display member 8.
An engaging portion 11a that elastically engages with the gear-like portion 10 of
The stopper member 11 has a stopper member 11.

Windows 1 are provided on both sides of the jacket 1 so that parts of both main surfaces of the magnetic sheet 2 housed in the jacket 1 are exposed outward in the radial direction.
2 and 13 are provided. These window parts 12,1
3 is provided between the center opening 5 and the front edge of the jacket 1, and is formed to have a width _W1 sufficient to allow at least the signal recording area of the magnetic sheet 2 to face outward in the radial direction. . Further, in the window portion 12 facing the signal recording surface side of the magnetic sheet 2 among the window portions 12 and 13, there is provided a magnetic head for recording a predetermined information signal on the signal recording surface or for reproducing the recorded information signal. enters and comes into sliding contact with the magnetic sheet 2.

A shutter 14 for opening and closing the windows 12, 13 provided on the jacket 1 is attached to the jacket 1 so as to be slidable in the direction of arrow A in FIG. The shutter 14 is formed by bending a thin elastic metal plate, such as a stainless steel plate, into a U-shaped cross section as shown in FIG. That is, the shutter 14 is connected to each of the window sections 12,
A pair of cover plates 15 and 16 facing each other in parallel and having a size sufficient to close the cover plate 13 from the outer surface side, and a back plate 1 that connects one end edge of each of these cover plates 15 and 16.
7, and the entire section is formed into a U-shape. The shutter 14 is connected to the window portion 1.
The cover plates 15 and 16 are extended to concave sliding areas 18 and 18 formed on both sides of the jacket 1 over one side edge of the jacket 1 including the peripheral edges of the jackets 2 and 13. It is attached so that it fits from the front side of the At this time, the shutter 14
The locking protrusions 19, 19 formed by bending the one lid plate 15 inward at the connecting portion with the rear plate 17 are connected to the guide formed on the front side of the one sliding area 18. By engaging with the groove 50, the jacket 1 is prevented from coming off from the jacket 1.

Shutter 14 installed as described above
is slidably operated over the range of the sliding area parts 18, 18, and the window part 1 of the sliding area parts 18, 18
By being moved until one side of the cover plates 15 and 16 comes into contact with the rising edge 18a on the second and 13 sides, the second
As shown in the figure, the windows 12 and 13 are in a closed state, and the lid plates 15 and 16 are moved until one side comes into contact with the rising edge 18b on one side of the sliding area parts 18 and 18. Therefore, the window portions 12 and 13
is in an open state.

Furthermore, at one end of the back plate 17 of the shutter 14 on the left side in FIG. . When the shutter 14 reaches the position where the windows 12 and 13 are closed, the engaging piece 21 engages the locking pawl 21a with the locking member 22 disposed inside the jacket 1, thereby locking the shutter 14 in place. This locks the sliding movement. The back plate 17 is positioned in a notched recess 20 formed on the front side of the jacket 1, and is moved along this notched recess 20.

The lock member 22, which holds the shutter 14 slidably attached to the jacket 1 in the closed position of the windows 12 and 13 as described above, is made of elastic synthetic resin or the like. ,
As shown in FIGS. 2 and 4, there is a support section 23 that is attached to the inner side surface of the jacket 1, and a support section 23 that protrudes laterally from the distal end of the support section 23, and is attached to the shutter 14. It consists of an elastic displacement part 24 facing between each cover plate 15 and 16, and is formed into a substantially L-shape as a whole. Support part 2 of this elastic displacement part 24
The continuous portion 24a to 3 has a small diameter, and is formed so that the continuous portion 24a serves as an elastic displacement point. The upper end surface side of the elastic displacement portion 24 protrudes in a bulging manner, and a locking pawl 21 at the tip of an engagement piece portion 21 provided on the shutter 14 is located near the top of the elastic displacement portion 24.
An engagement recess 27 is provided, which is an engagement portion that a is engaged with. On both sides of the engagement recess 27, a first inclined surface portion 25 that slopes toward the connecting portion 24a side and a second slope portion 26 that slopes toward the distal end side are formed, respectively. Further, an elongated hole 31 whose long diameter extends in the direction of elastic displacement is bored in the inner part of the elastic displacement section 24 .

Lock member 22 formed as described above
The elastic displacement part 24 is extended to the front side of the jacket 1, and the elongated hole 31 is engaged with the displacement guide pin 32 planted in the jacket 1, and the support part 23 is attached to the inner side of the jacket 1. The jacket 1 is attached to the jacket 1 by fixing one side of the jacket 1 as shown in FIGS. 2 and 4.

Further, at a position on the front side of the jacket 1 where the elastic displacement portion 24 of the lock member 22 extends, a guide slot 2 is provided continuously to the notch recess 20.
8 is bored, and the engagement recess 27 side of the elastic displacement portion 24 is connected to the jacket 1 through this guide slot 28.
It is protruded from the front side.

Furthermore, the magnetic sheet device is installed at a predetermined mounting portion of the magnetic recording/reproducing device at a substantially central position in the longitudinal direction of the back plate 17 of the shutter 14, so that each window portion 12, In connection with the operation of removing the shutter 14, which has been moved to the position where the shutter 13 is opened, from the mounting portion of the magnetic sheet device, a shutter closing means for operating the window portions 12 and 13 in a direction is engaged. A notch 34 is formed. In this embodiment, this notch 34 is provided as a concave notch on the outer surface of the back plate 17, and is engaged by shutter closing means provided on the magnetic recording/reproducing device side. The hole may be formed as a through hole.

The magnetic sheet device configured as described above connects the shutter 14 to the windows 12, 1 of the jacket 1.
3 to the closing position, the locking pawl 21a at the tip of the engaging piece 21 provided at one end of the shutter 14 is engaged with the engaging recess 27 of the locking member 22 provided on the jacket 1 side. The windows 12 and 13 are kept closed by the shutter 14, and dust and the like are prevented from entering through the windows 12 and 13, so that the magnetic sheet 2 can be protected.

The opening/closing operation state of the shutter 14 when the magnetic sheet device according to the present invention configured as described above is attached to and removed from a predetermined mounting portion of a magnetic recording/reproducing device will be explained.

First, in order to attach the magnetic sheet device to the mounting portion of the magnetic recording/reproducing device, the shutter 14 is engaged with the locking member 22 and the window portions 12 and 13 of the jacket 1 are opened.
Leave it in a closed state.

When the magnetic sheet device is inserted into the mounting portion of the magnetic recording/reproducing device from the front side where the shutter 14 is attached, the shutter 14 protruding from one side of the mounting portion is unlocked and A shutter opening member 35, which is a protrusion for opening the shutter 14, engages with a guide slot 28 formed on the front side of the jacket 1. When the jacket 1 is further inserted into the mounting part, the first inclined surface part 25 of the locking member 22 is pressed by the shutter opening member 35, so that the elastically displacing part 24 moves inward of the jacket 1. It is pressed and displaced. The engaging piece portion 21 provided on the shutter 14 by the elastic displacement portion 24 being pressed and displaced.
The locking pawl 21a at the tip disengages from the engagement recess 27 of the locking member 22, as shown in FIG. 5, and the shutter 14 becomes slidable. When the shutter 14 is disengaged from the locking member 22 in this manner, the shutter pressing operation portion 35a at the tip of the shutter opening member 35 is moved to the engagement piece portion 2 of the shutter 14.
1, and the sliding of this shutter 14 is restricted.

Further, on one side of the mounting portion of the magnetic recording/reproducing device, a cutout portion 34 provided in the back plate 17 of the shutter 14 is positioned in front of the shutter opening member 35 on the insertion side of the magnetic sheet device, and the magnetic The shutter 1 is placed in a position to open the windows 12 and 13 of the jacket 1 when the seat device is removed from the mounting section.
4 is provided with a shutter closing protrusion 36 constituting a shutter closing means for slidingly operating the window portions 12 and 13 in a direction to open them. This shutter closing protrusion 36 is made of an elastically displaceable material,
When the shutter pressing operation part 35a at the tip of the shutter closing member 35 comes into contact with the engagement piece 21 of the shutter 14, it resiliently contacts the back plate 17 of the shutter 14.

Then, when the jacket 1 is further inserted, the shutter 14 is moved to the shutter opening member 3.
Since the sliding movement is restricted by the opening 5, the jacket 1 moves relative to the jacket 1, and the windows 12 and 13 gradually open as shown in FIG. When the jacket 1 is further inserted into the mounting part and pushed to a predetermined mounting position, the shutter 14 is relatively moved to the position where the windows 12 and 13 are opened, as shown in FIG. becomes. Then, the shutter closing protrusion 36, which has been placed in pressure contact with the upper surface of the rear plate 17 of the shutter 14, elastically returns to fall into the notch of the rear plate 17 as shown in FIG. match. When the mounted magnetic sheet device is positioned at a predetermined position of the magnetic recording/reproducing device and the jacket 1 is locked in the mounting portion, the shutter 14 comes into contact with and is supported by the shutter opening member 35, and when the shutter is closed, the shutter 14 is supported. Piece 36
The window portions 12, 1 are pressed and supported by
3 is kept open. Further, the shutter 14 will not be inadvertently slid and close the windows 12 and 13 during recording and reproduction.

In order to remove the magnetic sheet device mounted on a predetermined mounting section as described above, when the jacket 1 is gradually pulled out from the mounting section, only the jacket 1 is pulled out as shown in FIG.
is kept in the same position. That is, the shutter 14 is prevented from sliding because the shutter closing protrusion 36 engages with the notch 34 provided in the back plate 17, and the magnetic sheet device is held in the position when the magnetic sheet device is positioned and attached to the mounting portion. be left in the same state as they were. At this point, insert the jacket 1 in the direction indicated by the arrow B in Fig. 8.
When pulled out in the direction, the shutter 14 is moved relative to the jacket 1 and closes the windows 12 and 13 of the jacket 1.

When the windows 12 and 13 of the jacket 1 are closed in this way, the shutter 14 closes the rising edge 1 of the sliding areas 18 and 18 of the jacket 1 on the windows 12 and 13 side.
8b and can move together with the jacket 1. Now, when the jacket 1 is further pulled out in the direction of arrow C in FIG. 9, the shutter closing protrusion 3
6 comes out of the notch 34 while being elastically displaced.
Then, the shutter opening member 35 is also attached to the guide groove 2.
8, and the elastic displacement portion 2 of the locking member 22
Release the pressure in step 4. In this way, the elastic displacement part 2
4 is released, the elastically displacing portion 24 protrudes into the guide slot 28 due to the elastic return force, and the locking pawl 21a at the tip of the engaging piece 21 of the shutter 14 engages the elastically displacing portion 24. Engaged in the engagement recess 27, the shutter 14 is locked by the locking member 22 to hold each window 12, 13 in a closed state.

Then, the locked pawl 21a at the tip of the engaging piece 21 of the shutter 14 locks into the engaging recess 27 of the locking member 22.
When engaged, the tip of the locking pawl 21a rides on the second inclined surface part 26 of the elastic displacement part 24, gradually elastically displacing the elastic displacement part 24 inward of the jacket 1. Therefore, smooth engagement operation can be achieved.

<Effects of the Invention> As described above, in the magnetic sheet device according to the present invention, when the shutter is in a state in which the window provided in the jacket is closed, the shutter is locked in the locking member provided in the jacket. Therefore, inadvertent opening of the window portion is prevented and reliable protection of the magnetic sheet is achieved.

Furthermore, when the magnetic recording/reproducing device is mounted on a predetermined mounting portion, the locking member for locking the shutter is engaged with the engaging piece of the shutter by the shutter closing member provided on the device side. Since the inclined portion provided on the side of the engaging portion is pressed and displaced, the shutter can be smoothly unlocked.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Fig. 2 is an enlarged front view of a partial section, Fig. 3 is an enlarged plan view thereof, Fig. 4 is an enlarged front view of the attachment part of the lock member, and Figs. 5 to 9 show the operation of the shutter in order. FIG. 5 is a front view showing a state in which the jacket is attached to the magnetic recording/reproducing device and the shutter is about to open the window;
FIG. 6 is a front view showing the shutter in the middle of opening the window, FIG. 7 is a front view showing the shutter opening the window, and FIG. 8 is a front view showing the jacket in the middle of opening the window. FIG. 9 is a front view showing a state in which the shutter is pulled out and the window portion is partially closed, and FIG. 9 is a front view showing a state in which the shutter is closed. 1...jacket, 2...magnetic sheet, 12,
13...Window part, 14...Shutter, 17...Back plate, 21...Engagement piece part, 22...Lock member, 2
4...Elastic displacement part, 25...First inclined surface part, 2
6...Second slope portion, 27...Engagement recess, 35
...Shutter opening parts.

Claims (1)

[Claims] 1. A locking member is provided in the jacket to lock a shutter for opening and closing a window provided in a jacket that rotatably houses a magnetic sheet in the closed position of the window, and the locking member locks the shutter in the closed position. 1. A magnetic sheet device, wherein inclined portions are provided on both sides of an engaging portion that engages with an engaging piece portion provided on the shutter opening member so that the shutter opening member can smoothly press the locking member in the release direction.