JPS59112471A - Sheet jacket - Google Patents

Abstract

PURPOSE:To hold exactly a jacket in a holder, and to prevent it from being ejected at the time of ejection by providing an ejection preventive engaging hole which is engaged to an engaging piece of a jacket holder, and an inserted state holding engaging hole, on one side face of a seat jacket. CONSTITUTION:An engaging piece 31 of a jacket holder 18 goes into an inserted state holding engaging hole 11 of a jacket sheet 1 inserted into the holder 18, and the jacket 1 is held exactly. When an upper cover 49 is pushed, a release pin 45 of the engaging piece 31 contacts by pressing to a release piece 46, the holder 18 moves a little to the outside, and a pin 52 is inserted into a positioning hole 17 at a position where the holder contacts by pressing to a closing piece 50, therefore, the jacket 1 can be positioned exactly at a prescribed installing position. Subsequently, when the upper cover 49 is opened, the jacket 1 is ejected energetically, but an ejection of the jacket 1 can be prevented since an ejection preventive engaging hole 10 of the jacket is engaged to the engaging piece 31 on the way.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a novel seat jacket, and more specifically, to a seat jacket that is firmly held in a jacket holder provided on the main body of a magnetic recording device or a magnetic recording/reproducing device. The present invention aims to provide a novel seat jacket that is guided to a predetermined location within the main body and is prevented from flying out forcefully from the jacket holder when ejected.

BACKGROUND ART AND THE PROBLEMS A magnetic sheet is rotatably housed inside a jacket housing to constitute a seat jacket, a still image is magnetically recorded on the surface of the magnetic sheet within the seat jacket, and a still image is recorded on the magnetic sheet. A technology for reproducing still images has been developed by the applicant company. This will be explained in accordance with FIG. 1 as follows. That is, a disc-shaped magnetic sheet a for magnetic recording is rotatably housed in a housing b consisting of a lower half body and an upper half body (Figure 1 shows the state with the upper half body removed). This constitutes a seat jacket C. Then, it is made so that magnetic recording can be performed on a magnetic sheet a through a window d provided in the housing, and this sheet jacket C is attached to an electronic still camera, and a still image is recorded on the magnetic sheet a inside the jacket C. magnetically record. And when playing, Seat Jacket C
is attached to a magnetic recording and reproducing device called a viewer etc.
A still image magnetically recorded on the surface of the magnetic sheet 8 is reproduced by a reproducing head or the like within the magnetic recording/reproducing device. Incidentally, the window d provided in the housing is essential for magnetic recording and reproduction, but it also serves as a path for dust to enter from the outside of the seat jacket c, so when not performing magnetic recording or reproduction, It needs to be shielded. Therefore, for example, a shutter e for closing the window d is attached to the inside of the jacket 14 so that it can be moved back and forth in the direction shown by the arrow f in FIG. 1 by suitable means. And this shutter e has a spring g
The window d is always energized to keep it closed. Specifically, one end of the tension spring g is locked to a catch 11 nip h protruding from the inner surface of the shutter e,
The other end is locked to a lock 11 nip i formed on the side edge at right angles to the side edge where the window d is cut out, and the middle part of the tension spring g is connected to the rotation axis j at the corner of the housing. A spring g is bent at a right angle by being brought into contact with a pulley k which is rotatably supported through the spring g. Therefore, the shutter e is the spring g
is urged toward the pulley side by the pulley, and comes into contact with a pin-shaped stopper 1 provided on the pulley side of the window d, preventing movement from the position where the window d is closed toward the pulley side. Therefore, the seat jacket C is normally in a state where the window d is closed by the shutter e. For example, when the sheet jacket C is loaded into a jacket holder of a magnetic recording/reproducing device (not shown), the shutter e is locked to a locking means such as a locking pin of the jacket holder, and the amount of sheet jacket C loaded into the jacket holder increases. Accordingly, the shutter e resists the elastic force of the spring g and closes the window d.
The window d is moved to the side opposite to the pulley, and the window d is completely opened when the seat jacket c is completely inserted. Therefore, when the seat jacket C is loaded into the holder, it is always subjected to a force in the direction of being pushed outward from the jacket holder by the elastic force of the spring g. Therefore, while the sheet jacket c was guided by the sheet holder to be attached to a predetermined position in the main body of the magnetic recording/reproducing device, the sheet jacket 1-c was inserted into the jacket holder. The condition must be maintained against the elastic force of the spring g, and therefore the seat jacket c must be held down from the outside with hands, etc., so there is a problem that the operability of installing the seat jacket c is very poor. Ta. Furthermore, when the seat jacket c is extended from the apparatus, there is a problem in that the seat jacket c is violently thrown out from the jacket holder by the elastic force of the spring g as soon as the seat jacket c is brought into the Nijief I state.

Therefore, the seat jacket can be firmly held by the jacket holder and guided to a predetermined location within the device body, and the sheet jacket can be guided into the device body by the jacket holder and then inserted into the device body. The inventor of the present invention has devised a new seat jacket mounting mechanism that allows for a smooth transition to the mounted state and also prevents the seat jacket from flying out from the jacket holder when ejected. .

OBJECTS OF THE INVENTION The present invention is intended to provide a novel sheet jacket suitable for attachment to a magnetic recording device, magnetic recording/reproducing device, etc. using the above-mentioned new sheet jacket attachment mechanism. That is, an object of the present invention is to allow a magnetic recording device or a magnetic recording/reproducing device to be guided to a predetermined location in the main body while being firmly held by a jacket holder provided in the main body, and to be guided to a predetermined location within the main body of the magnetic recording device or magnetic recording/reproducing device, and to be able to generate force from the jacket holder at the time of ejection. The aim is to provide a novel seat jacket that does not have the habit of popping out.

12. A magnetic recording device in which a magnetic sheet is rotatably housed in a jacket housing and is equipped with a jacket holder. tt or a sheet jacket that is guided to a predetermined location in the magnetic recording/reproducing device while being inserted into the jacket holder and is attached to the L device, one side along the direction in which the jacket is inserted into the jacket holder of the jacket On the side surface thereof, there is an engagement hole for pop-out prevention 1F that engages with the engagement means in the jacket holder, and an L-alignment engagement means located at a location spaced apart from the retaining hole in the opposite direction to the charging direction. The device is characterized in that an engagement hole for maintaining the loaded state is formed to engage with the insertion state.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the seat shield of the present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments thereof and a seat jacket attachment mechanism.

FIGS. 2 to 5 are for explaining an embodiment of the seat jacket of the present invention and an example of a seat jacket mounting mechanism for mounting the seat jacket on a magnetic recording/reproducing device. In the drawing, 1 is the seat jacket,
A disk-shaped magnetic sheet 3 is rotatably housed inside a jacket housing 2. A drive hole 4 is formed in the center of the magnetic sheet 3, into which a rotational drive shaft (not shown) of the main body of a magnetic recording/reproducing device to be described later is inserted, and the drive hole 4 is bored approximately in the center of the jacket housing 2. It faces the drive shaft insertion hole 5. Reference numeral 6 denotes a window provided in the jacket housing, through which a part of the magnetic sheet 3 is exposed to the outside of the jacket housing 2. The windows 6 are provided at corresponding positions on the front and back sides of the jacket housing 2, and only the window 6 on the front side is visible in FIG. This window portion 6 is provided so that when the sheet jacket 1 is installed in the main body of a magnetic recording/reproducing apparatus, the reproducing head of the main body of the apparatus can come into contact with the surface of one side of the magnetic sheet 3. The length of the window portion 6 in the radial direction of the magnetic sheet is set so that the reproducing head can move from the peripheral edge of the magnetic sheet to the vicinity of the inner edge along the radial direction. A shutter 7 has a U-shaped cross section and closes the two windows 6 while holding the sides of the jacket housing 2 between them. The shutter 7 is attached so as to be movable back and forth between a position where the window 6 is closed and a position opposite to the sheet jacket insertion direction (indicated by arrow 8), that is, a position where the window 6 is opened. There is. Shutter 7
For example, similarly to the seat jacket c shown in FIG. 1, the seat jacket c is biased toward the seat jacket loading direction so that the window portion 6 is normally kept in a closed position. A pin guide groove 9 for guiding a shutter opening pin, which will be described later, is formed on the side of the jacket housing 2 that is held between the U-shaped shutters 7, that is, on the side end surface on which the shutters are held. The pin guide groove 9 extends from the end of the jacket housing 2 on the side to be inserted into the jacket water radar, that is, from the charging end, and although not clearly shown in the drawing, the pin guide groove 9 extends from the end of the jacket housing 2 on the side where it is inserted into the jacket water radar, and extends from the end of the groove 9 on the anti-charging end side, although it is not clearly shown in the drawing. is located closer to the reciprocal loading end (the end on the sheet jacket extraction side) than the position corresponding to the window portion 6.

Numerals 10 and 11 are engagement holes formed in the side end surface of the jacket housing 2 on the side opposite to the shutter attachment, and 10 is a pop-out prevention hole 1 located in a portion of the side end surface near the charging end.
This is an engagement hole for 1-. The other numeral 11 is an engagement hole for maintaining the charged state, which is located slightly closer to the anti-loading end (extraction side end) than the center of the side end surface of the jacket housing 2. The function of these two engagement holes 10 and 11 will become clear later. In addition, 12 is the image number display section, and the jacket housing 2
A ring 1614 is provided around an opening 13 formed in a part of the front side of the display, and an annular display member 15 is rotatably mounted within the opening 13. The image number display section 13 is adapted to display the number of the image being recorded or reproduced during recording or reproduction using the tens scale 14 of the notch-shaped index 16 of the display member 15. Reference numeral 17 denotes a positioning hole formed in the center of the opposite end (extraction side end) of the opening surface of the jacket A body 2.

Next, a sheet jacket mounting mechanism provided in the magnetic recording/reproducing device will be explained. The seat jacket attaching mechanism receives the seat jacket j by a jacket holder 18 and guides it to a predetermined location in the main body of the magnetic recording/reproducing apparatus, and the main body of the magnetic recording/reproducing apparatus itself is not shown in the explanation of this mechanism. jacket holder 1
8 is a side piece 20.21 formed by bending both side edges of a metal plate 19 made of aluminum or the like along the direction of inserting the jacket (in the direction shown by arrow 8) downward;
Fold the tip of the metal plate 19 parallel to the main part to form the folded piece 2.
2.23, so that the seat jacket 1 can be received and held by the side pieces 20.21 and the folded pieces 22.23. Reference numeral 24.25 denotes a shaft insertion hole drilled in a portion extending from the side piece 20.21 along the jacket insertion direction, and the shaft insertion hole 24.25 is provided with a shaft insertion hole provided in the main body of the magnetic recording/reproducing apparatus. A holder support shaft 26 is inserted through the jacket holder 18.
It is rotatably supported by. 27 is a window formed in the jacket holder 18, and the seat jacket 1
It is formed at a position corresponding to the portion where the window portion 6 and the drive shaft insertion hole 5 are formed. Reference numeral 28 denotes a shutter opening pin formed protrudingly on the inner surface of the side piece 21, and its position in the sheet jacket insertion direction is slightly closer to the seat than the window portion 27.
・It is positioned closer to the jacket receiving end (rotation end). Then, it is loaded into the seat jacket holder I-1 or jacket holder 18.

When the position of the shutter release pin 28 is reached, the pin 28 fits into the pin guide groove 9 from its end, and the sheet jacket 1 continues to be inserted in this state. When the window 6 of the sheet jacket l reaches the position where the shutter release pin 28 is formed, the pin 28 engages with the shutter 7, and even as the sheet jacket 1 is loaded, the pin 28 does not engage with the shutter release bin 28. It does not move from the position in the seat jacket loading direction. Therefore, the shutter 7 is moved in the direction opposite to the sheet jacket insertion direction relative to the sheet jacket 1, and as a result, the window portion 6 is in an open state, and in this state, the sheet jacket 1 is moved inside the jacket 1 holder 18. It will be stored in.

Reference numeral 29 denotes a notch formed in the side piece 20 of the jacket holder 18, which is located slightly closer to the sheet jacket receiving end than the center of the side piece 20. A joint piece 31 is positioned. The jacket lock mechanism 30 allows the seat jacket 1 to be securely held by the jacket holder 18 when the seat jacket 1 is mounted by engaging the engagement piece 31 with the engagement hole 0.11 of the seat shaker. It maintains the condition and functions to prevent the seat jacket 1 from flying out from the cage holder 18 when the seat jacket 1 is taken out. Reference numeral 32 denotes an elongated slide plate that rotatably supports the engagement piece 31 by a support shaft 33, and a pair of support pins 34 and 34 protruding from the lower surface of the folded piece 22 are used to insert the seat jacket. It is supported so that it can reciprocate along the direction. Specifically, elongated holes 35.325 are formed at both ends of the slide plate 32, into which the small-diameter tips of the support pins 34.34 are inserted. A support pin 34 is inserted into the elongated hole 35.35.
．． The inner edge of the elongated hole 35.35 of the slide plate 32 is inserted into the support pin 34.34 so that the small diameter tip of the slide plate 34 is inserted.
It is brought into contact with a step (not shown) between the small-diameter tip and the large-diameter base. And the long hole 35 of the support pin 34.34
．． An E-ring 36.36 is attached to the portion protruding from 35, so that the inner edge of the elongated hole 35.35 is engaged by the E-ring 36. 37 is slide plate 3
Spring engaging 1F piece integrally formed in the middle part of 2, 3
Reference numeral 8 denotes a spring locking piece integrally formed at the end of the side piece 20 opposite to the sheet jacket insertion end, and the locking piece 38
A spring 39 is provided between the spring locking piece 37 and the spring locking piece 37.
is tensioned, and the slide plate 32 is biased by the spring 39 in the seat jacket insertion direction (direction shown by arrow 8). The stroke and normal position of the slide plate 32 are appropriately set depending on the length and position of the long holes 35 and 35. The slide plate 32
A projecting piece 40 projecting outward is formed in the middle part of the
A support shaft 33 for supporting the engagement piece 31 is erected at the center of the projecting piece 40, and the engagement piece 31 is rotatably supported by the support shaft 33 at one end thereof. Reference numeral 41 denotes a contact that is integrally formed to protrude approximately at the center of the upper end surface of the engaging piece 31, and is formed so as to be able to come into contact with a cam portion 43 formed on the upper edge 42 of the notch portion 29. .

Reference numeral 44 designates an engaging pawl that is formed protrudingly from the end side surface of the engaging piece 31 on the rotating end side. The engaging claw 44 is connected to the jacket holder 1.
1-Example of 8 or has a triangular shape when viewed from below, and its tip 44a is connected to the seat jacket 1 in the seat jacket loading direction of the pop-out prevention engagement hole 10 and the loading state maintenance engagement hole 11. By coming into contact with the side surfaces 10a and lla, it engages with the engagement hole 10.11 and stops the movement of the seat jacket 1 in the opposite direction of inserting the seat jacket (direction of pulling out the seat jacket). Movement in the jacket loading direction is allowed. Reference numeral 45 designates an engagement release pin formed protruding from the lower surface of the rotating end portion of the engagement piece 31. When the jacket holder 18 is rotated so as to be stored in the main body of the magnetic recording/reproducing apparatus, the engagement release pin 45 comes into contact with an engagement release piece 46 provided inside the main body of the magnetic recording/reproducing apparatus, and is released from the jacket holder 18 outward. It is a device that can be moved in the direction of. Reference numeral 47 denotes a torsion spring that urges the engaging piece 31 in the counterclockwise direction in FIG. The other end is engaged with the side of the overhanging piece 40, and the other end is engaged with the side of the engagement piece 31 on the opposite side of the engagement claw! has been recorded. Due to the biasing force of the torsion spring 47, the engaging piece 31 is oriented so that its rotating end is located on the seat jacket insertion direction side relative to the supporting end, and the contact 41 formed thereon is attached to the upper edge 42 of the notch 29. keep it in contact with the

A portion of the upper edge 42 of the notch 29 of the jacket holder 18 that comes into contact with the contact 41 formed on the engagement piece 31 is a cam portion 43, and the retaining piece 3 is moved as the slide plate 32 moves.
The position of the contact 41 in the direction perpendicular to the sheet jacket insertion direction changes according to the change in the position of the contact 41 in the sheet jacket insertion direction. 31 can rotate around the support shaft 33. Specifically, the end 43a of the cam part 43 on the side of the seat jacket insertion direction draws an in-line parallel to the seat jacket insertion direction, and the part 43b of the cam part 43 on the side of the rotational end of the jacket holder is rotated. It is formed so as to draw an inclined line that goes outward of the jacket holder 18 as it goes toward the end (pulling end) side. As will be described later, with the engagement claw 44 of the engagement piece 31 engaged with the protrusion prevention engagement hole 10 of the seat jacket 1, the seat jacket 1 is inserted in the direction opposite to the arrow 8, opposite to the seat jacket insertion direction ( When the seat jacket is pulled out), contact 4
1 is gradually moved to the outside of the jacket holder 18 by the inclined portion 43b of the cam portion 43, and the engaging piece 31 is rotated counterclockwise. This amount of rotation is determined by the amount of rotation of the engaging claw 44 of the engaging piece 31.
is set to the minimum length required for the state to change from a state in which it is completely engaged with the engagement hole 10 for preventing pop-out of the seat jacket 1 to a state in which the engagement is released. 48. 48 is a stopper piece formed to protrude downward from the end face of the rotatably supported side of the jacket holder 18, and when the sheet jacket 1 is inserted into the jacket holder J8, the charging end The sheet jacket 1 is brought into contact with the sheet jacket 1, thereby preventing further movement of the sheet jacket 1 in the sheet jacket insertion direction.

Reference numeral 49 denotes a lid that covers the salmon/lid holder 18, one end of which is rotatably supported by the holder support shaft 26 that supports the jacket holder 18, and a closing piece 50 located at the rotation end of the lid 49. A stopper 5 is provided on the inner surface of the sheet jacket 1 in contact with the opposite end surface of the sheet jacket 1 to prevent further movement of the sheet jacket in the direction opposite to the charging direction.
1 is fixed.

FIGS. 4 and 5 are explanatory diagrams of the principle of the mechanism for the operation of the attachment mechanism when the seat jacket attachment mechanism 1 is attached to the operating lid into the apparatus body by the seat jacket attachment mechanism and further pulled out from the apparatus body. This will be explained in detail according to the drawings.

FIGS. 4A to 4E show changes in the shape of the seat jacket attachment mechanism when a seat jacket is attached. First, as shown in FIG.
Then, the jacket holder 18 is rotated so as to open the space between it and the main body of the magnetic recording/reproducing apparatus. At this time, the rotation angle of the -J1 lid 49 is made larger than that of the jacket holder 18 so that the seat jacket loading port of the jacket holder 18 is
State 1N1 not closed by blockage piece 50 of thought 49
Make it. Then, in that state, the holder 18
Insert seat jacket 1 into. Then, the same figure (B)
As shown in FIG. 2, the seat jacket 1 is inserted until it comes into contact with the stopper pieces 48, 48 of the jacket holder 18. In this state, the engagement surface 11a of the engagement hole 11 for holding the loaded state of the sheet jacket 1 is the engagement claw 44 of the engagement piece 31 provided on the jacket holder 18, and the tip surface 44
9 is slightly closer to the seat jacket loading direction than a.
Therefore, the tip of the engagement claw 44 enters into the engagement hole 11.

By the way, seat jacket 1 is jacket holder 1.
8, the shutter 7 of the seat jacket 1 is moved by the above-mentioned center release pin 28 from the position where the window portion 6 is closed to the side opposite to the sheet jacket insertion direction by an internal biasing means (not shown). The window portion 6 is moved against the biasing force of the spring (corresponding to the spring g in FIG. 1), and the window portion 6 is brought into an open state. At the same time, the biasing means of the sheet jacket I-1 accumulates a repulsive force that resists the force that pushes it against the inserter. Therefore, when the hand that inserted the seat jacket 1 is removed, that is, when the force of inserting the seat jacket 1 is removed, the stored repulsive force causes the seat jacket 1 to move in the opposite direction (pulling direction). will be moved. Then, as shown in FIG. 4(C), the engagement hole 11 for maintaining the loaded state is opened.
The engaging surface 11a of the engaging claw 44 of the engaging piece 31
and 0 come into contact with each other, and this contact prevents further movement of the seat jacket 1 in the direction opposite to the seat jacket insertion direction (the seat jacket withdrawal direction). As a result, the seat jacket hl is firmly held in the state in which it is inserted into the jacket holder 18, and it is not necessary to apply special force to the seat jacket 1 to maintain this state.

As shown in FIG. 4(C), when the seat jacket 1 is held in the jacket holder 18, push the jacket 49 from above and store the jacket 49 and jacket holder 18 into the main body of the magnetic recording/reproducing apparatus. Rotate it so that it appears. Then, the engagement release pin 45 formed protrudingly on the lower surface of the engagement piece 31 comes into contact with the engagement release piece 46 provided on the main body of the magnetic recording/reproducing apparatus, and the jacket holder 1 is released.
8 in the outward direction. That is, the main body of the magnetic recording and reproducing apparatus has an upwardly protruding disengagement piece 46 that comes into contact with the disengagement pin 45 when the jacket holder 18 is housed in the nail mounting body. The disengagement piece 46 is bent into an arc shape so that the part on the first side approaches the jacket holder 18 side as it goes upward, and is connected to the tip of the disengagement pin 45 of the jacket holder 18 that is rotated and the outer surface. It is arranged so that they come into contact with each other. Therefore, when the jacket holder 18 is rotated in the direction in which it is housed in the magnetic recording/reproducing apparatus main body, the engagement release pin 45 is brought into contact with the engagement release piece 46, and the engagement release piece 4
6, the jacket holder 18 is gradually moved toward the outside of the jacket holder 18.

As a result, the engaging piece 31 is rotated counterclockwise in FIG.
The state of engagement with the engagement hole 11 for maintaining the charged state is released. Then, the jacket holder 18 is moved in the direction opposite to the seat jacket (the direction in which the seat jacket is pulled out) by the intermediate force stored in the biasing means (not shown) mentioned above, and as shown in FIG. It comes into contact with a stopper 51 fixed to the inside of 50.

By the way, in this state, the truncated cone-shaped upper end of the positioning pin 52 provided on the main body of the magnetic recording/reproducing apparatus is fitted into the positioning hole 17 provided in the sheet jacket 1.

That is, the main body of the magnetic recording/reproducing device has a jacket l.
A positioning pin (not shown in FIG. 2) 52 is provided to be fitted into the positioning hole 17 of In the process of fitting the conical portion into the positioning hole 17, the seat jacket l is positioned in the loading direction. As shown in FIG. 4(D), when the seat jacket 1 is in contact with the stopper 51 provided on the closing piece 50 of the cover 49, the position of the seat I/jacket l is lower than the predetermined mounting position. The position of the positioning pin 52 is set so that the upper end of the positioning pin 52 can fit into the positioning hole 17 at a slightly opposite side in the direction of inserting the sheet jacket. Then, from the state shown in FIG. 4(D), further I: ? ,? Press 49” - Lid 4
9 and Jacquera) - When the holder 18 is rotated until it is completely housed in the main body of the magnetic recording/reproducing device,
As shown in FIG. 5E, the seat jacket 1 is firmly positioned at a predetermined mounting position by the positioning pin 52 as the truncated conical portion of the positioning pin 52 gradually fits into the positioning hole 17, becomes playable.

According to the seat shaker 1 and the seat jacket mounting mechanism, the seat jacket 1 can be guided to a predetermined location on the main body of the magnetic recording/reproducing apparatus while being properly held by the jacket holder 18, and in the process. There is no need to apply any special force to keep the seat jacket 1 held within the jacket holder 18 (,N).

Next, the operation when the seat jacket l is taken out will be explained.

Figures 5 (A) to (C) show changes in the state of the seat jacket attachment mechanism when the seat jacket 1 is ejected.
This is shown in No. 1ll'1. First, when the J:M2S 49 and the jacket holder 18 are rotated to open as shown in FIG. It tends to be ejected from the jacket holder 18 due to the repulsive force of the biasing means. However, when the engagement hole 10 for preventing pop-out of the seat jacket 1 reaches the position where the engagement piece 31 of the jacket holder 18 exists, the engagement claw of the engagement piece 31 is biased clockwise by the torsion spring 47. As shown in FIG. 5(B), the distal end surface 44a of the seat jacket 44 engages with the engagement surface 10a of the engagement hole 10 of the pop-out preventer 1, and this engagement prevents the seat jacket 1 from being ejected.

The seat jacket 1 is shown in FIG.
Pull with your fingers as shown in C). Then, the engagement piece 31 is engaged with the pop-out prevention 1 through the engagement hole 10 and the engagement claw 44.
receives the pull-out force, and the slide plate 39 (see Figure 2) supporting the engagement piece 31 resists the tensile force of the spring 39 urging it in the seat jacket loading direction. The engaging piece 31 moves toward the rotation end of the jacket holder 18, that is, in the pulling direction. When the retaining piece 31 moves, the pin-shaped contact 41 formed on the engaging piece 31 moves while being in contact with the notch 29F of the jacket holder 18 and the cam part 43 on the edge, and the inclined part of the cam part 43 moves. When the contact 41 moves on the jacket holder 18
As a result, the engaging piece 31 is rotated in the counterclockwise direction in FIG. The condition is cleared. Therefore, after that, the Sea I jacket 1 can be pulled out from the jacket holder 18 by hand without any trouble.

According to this seat jacket 1 and the seat jacket attachment mechanism, when the seat jacket 1 is about to be ejected from the jacket holder 18 by the elastic force stored in the internal urging means, the seat jacket 1
The engagement piece 31 of the jacket holder 18 engages with the engagement hole 10 for the seat jacket 1.
can be prevented from jumping out forcefully from the shampoo holder 18. Then, when the seat jacket 1 that is engaged with the engagement piece 31 in the engagement hole lO for preventing pop-out is pulled, the engagement piece 31 supported on the slide plate 31 is also moved accordingly, and the movement is In the process, the engagement piece 31 is rotated by the action of the cam portion 43 and the contactor 41, and the engagement state with the pop-out prevention engagement hole 10 is released.

Therefore, the seat jacket 1 can be smoothly taken out from the jacket holder 18 by applying the pulling force.

In addition, in FIGS. 4 and 5, 53 is a support piece provided on the main body of the magnetic recording/reproducing apparatus,
The holder support shaft 26 rotatably supports the holder support shaft 26. 4 and 85 schematically illustrate only the minimum necessary portions for understanding the operation of the seat jacket attachment mechanism.

Note that this sheet jacket mounting mechanism can be applied not only to magnetic recording and reproducing devices but also to magnetic recording devices.

Effects As described above, in the sheet jacket of the present invention, a magnetic sheet is rotatably housed in the jacket housing, and the jacket is inserted into a predetermined location in a magnetic recording device or magnetic recording/reproducing device equipped with a jacket hole. A seat jacket is installed in the above-mentioned device while being guided in a state where it is not fully inserted into the holder, and one side of the jacket housing along the direction of insertion into the jacket holder is engaged with the retaining means in the jacket holder. a retaining hole for preventing pop-out +)-, and an engaging hole for maintaining the loaded state that is located at a location spaced apart from the engaging hole in a direction opposite to the loading direction and that engages with the engaging means. It is characterized by being formed.

Therefore, if the seat jacket of the present invention is used with a suitable seat jacket mounting mechanism as shown in FIG. By fitting the jacket holder, the jacket is firmly held by the jacket holder and guided to a predetermined location in the main body of a magnetic recording/reproducing device or the like. Therefore, according to the present invention, it is not necessary to apply any force with fingers or the like in order to maintain the state in which the seat jacket is held by the jacket holder.

Furthermore, when the seat jacket is taken out, the engagement of the seat jacket's pop-out prevention engagement hole with the engagement means of the jacket holder can prevent the seat jacket from popping out from the jacket holder.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a state in which the upper half of the seat jacket is removed to explain the background art, and Figs. 2 to 5 illustrate an example of the implementation of the seat jacket of the present invention and an example of the seat jacket attachment mechanism. Figure 2 is a perspective view showing the entire seat jacket and seat jacket attachment mechanism;
Figure 3 is a bottom view showing the main parts of the jacket holder;
Figures (A) to (E) are schematic diagrams explaining the principle of the mechanism, showing changes in the state of the seat cushion attachment mechanism when the seat jacket is attached, and Figures 5 (A) to (C) are diagrams showing the changes in the state of the seat shaker attachment mechanism when the seat jacket is attached. FIG. 6 is a schematic diagram illustrating the principle of changes in the state of the seat jacket attachment mechanism when it is taken out. Explanation of symbols l-φ-sheet jacket, 3...magnetic sheet,
lO...Retaining hole for pop-out prevention 1, 11...-Retaining hole for maintaining loaded state

Claims (1)

[Claims] (1) A magnetic sheet is rotatably housed in a jacket casing, and is inserted into the jacket holder and guided to a predetermined location in a magnetic recording device or magnetic recording/reproducing device equipped with a jacket holder, and then attached to the device. The seat jacket has an engagement hole on one side along the direction in which the jacket is inserted into the jacket holder of the body, and an engagement hole for preventing popping out that engages with the engagement means in the jacket holder; A sheet jacket characterized in that an engagement hole for maintaining the charged state is formed at a location spaced apart from the hole in a direction opposite to the charging direction and engages with the engagement means.