JPH087554A - Cover mechanism of insertion port for recording medium housing unit - Google Patents

Abstract

PURPOSE:To improve the reliability of the motion to push and open the cover by a magnetic disk cartridge to be inserted, in respect to the cover mechanism of a port for the recording medium housing unit. CONSTITUTION:The port 15 of the magnetic disk cartridge is closed by a main body 22 of the cover. The main body 22 of the cover is provided with a recessed part 26 on the rear surface 22b. A shield cover 14 of the magnetic disk device is provided with receiving pieces 44-1, 44-2 and a hook piece 44-3 which are confronted with the recessed part 26. The rear surface of the cover main body 22 deflected in the direction X is caught by the receiving pieces 44-1, 44-2. The hook piece 44-3 is constituted so as to restrain the recessed part 26 when the cover main body 22 is deflected in the direction Z.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid mechanism for a recording medium container insertion slot.

[0002]

2. Description of the Related Art In a recording / reproducing apparatus such as a magnetic disk device, for example, when a magnetic disk cartridge containing a flexible magnetic disk as a recording medium housing is inserted into a disk insertion opening provided in a front bezel. Along with the insertion operation of the magnetic disk cartridge, the flexible magnetic disk is mounted on the turntable and magnetic recording and reproduction becomes possible.

As a conventional lid mechanism for the magnetic disk cartridge insertion opening, for example, there are a type in which a lid as shown in FIG. 13 is incorporated in the front bezel and a type in which the lid is incorporated on the frame side as shown in FIG.

In FIG. 13, a lid 1 has shafts 2 at both ends and a central portion, and each shaft 2 has a mounting hole 3a for a front bezel 3.
And is rotatably supported. Therefore, when a magnetic disk cartridge (not shown) is inserted into the disk insertion opening 3b of the front bezel 3, the lid 1 is pressed against the front end of the magnetic disk cartridge while supporting the shafts 2 at three locations, and the magnetic disk device is driven. Rotate in and insert the disc 3
Open b.

Further, in the structure shown in FIG. 14, the lid 1 is rotatably supported by fitting the shafts 2 protruding at both ends into the mounting holes 4a of the frame 4. Then, the lid 1 is attached to the frame 4
After mounting, the hooks 5 projecting on both sides of the front bezel 3 are fitted into the mounting holes 4b of the frame 4. In this case, the lid 1 supports the shafts 2 at both ends to open and close the disc insertion opening 3b of the front bezel 3.

[0006]

However, since the space above the disk insertion opening 3b of the front bezel 3 becomes smaller as the magnetic disk device becomes thinner, it is provided at the center of the lid 1 as shown in FIG. The space for providing the mounting hole 3a for supporting the shaft 2 is eliminated. Further, in the thinned state, the installation place of the rotation fulcrum of the lid 1 is also limited, and in consideration of the opened state of the lid 1, it becomes necessary to reduce the thickness of the lid 1, and much less on the upper side of the front bezel 3. Since the dimensions are also thin, it becomes difficult to provide the mounting hole 3a in the central portion of the front bezel 3.

Therefore, as the lid mechanism of the magnetic disk cartridge insertion opening, the structure shown in FIG. 14 tends to be gradually adopted. In this configuration, the lid 1 has the shafts 2 at both ends.
Since the lid 1 is rotatably supported, the strength of the central portion of the lid 1 is weak, and particularly when the device is thinned as described above, the lid 1 is also thin, so that the strength of the lid 1 itself decreases. ing.

Therefore, as shown in FIG. 15, when the magnetic disk cartridge 6 (indicated by the one-dot chain line) is inserted into the disk insertion opening 3b of the front bezel 3, for example, the tip of the magnetic disk cartridge 6 moves along the shafts 2 at both ends. When the lid 1 is obliquely inserted toward the center of rotation, the central portion of the lid 1 is warped and deformed, so that the shafts 2 at both ends may come off from the mounting holes 4a of the frame 4. .

Therefore, the present applicant has previously filed Japanese Utility Model Application 4-8.
No. 9018, the name of the device, "capping mechanism for recording medium insertion port", was filed.

FIG. 16 shows the lid mechanism 10.

A stopper 11 is formed by bending the edge of the shield cover 12 of the magnetic disk device on the front bezel side downward.

The stopper 11 acts to receive the portion of the back surface of the lid 1 near the upper end when the lid 1 is about to bend as shown in FIG.

As a result, the warp of the lid 1 is limited,
It rotates smoothly and is pushed open. However, for example, when the magnetic disk cartridge 6 is inserted obliquely downward as indicated by arrow C, the lid 1 is bent obliquely downward as indicated by arrow C, and in some cases, the lid 1 is 16
As indicated by the chain double-dashed line, the stopper 11 may enter the inside of the stopper 11 beyond the lower side thereof.

When this happens, the lid 1 is bent so as to be convex inside the magnetic disk drive, and the lid 1
Will not open and close smoothly.

Therefore, it is an object of the present invention to provide a lid mechanism for a recording medium insertion opening that solves the above problems.

[0016]

According to a first aspect of the present invention, there is provided a lid body having a substantially rectangular plate shape, and portions on both ends in the longitudinal direction of the lid body are connected to the body of the recording medium recording / reproducing apparatus. A recording medium container insertion port lid mechanism that is movably supported and normally has a lid that closes the insertion port into which the recording medium container is inserted and that is opened by the recording medium container that is inserted. In, a receiving portion that faces the back surface of the lid body and receives a part of the back surface of the lid body when the lid body is bent in the direction of the inside of the recording medium recording / reproducing apparatus body. And a hook portion that locks a part of the lid body when the lid body is bent downward.

According to a second aspect of the present invention, there is provided a lid body having a substantially rectangular plate shape, and portions on both longitudinal ends of the lid body are rotatably supported by the recording medium recording / reproducing apparatus body. Cage,
Usually, in the lid mechanism of the recording medium container insertion opening, which has a lid that closes the insertion port into which the recording medium container is inserted and is pushed open by the inserted recording medium container, the lid is It has a structure having a recess on the back surface of the main body,
Further, the recording medium recording / reproducing apparatus main body faces the back surface of the lid main body, and when the lid main body is bent in the direction of the inside of the recording medium recording / reproducing apparatus main body, the back surface of the lid main body. And a hook portion that faces the recess of the lid body and that locks the recess when the lid body is bent downward. It was done.

According to a third aspect of the present invention, the receiving portion and the hook portion are constituted by a tongue portion formed at an edge portion of a shield cover attached so as to cover the upper surface of the recording medium recording / reproducing apparatus main body. It is what

[0019]

In the invention of claim 1, the receiving portion acts so as to limit the lid body from being bent more than a certain amount in the direction of the inside of the recording / reproducing apparatus.

The hook portion acts to limit the downward bending of the lid main body beyond a certain amount.

In the invention of claim 2, the receiving part and the hook part operate in the same manner as the receiving part and the hook part of the invention of claim 1. The concave portion of the invention of claim 2 acts so as to ensure locking by the hook portion.

According to the third aspect of the present invention, in the structure in which the tongue portion of the shield cover constitutes the receiving portion and the hook portion, by attaching the shield cover, the receiving portion and the hook portion act so as to face the back surface of the lid body. To do.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS For convenience of description, first, a magnetic disk device to which a lid mechanism according to an embodiment of the present invention is applied will be described.

As shown in FIG. 2, the magnetic disk drive 10
Has a thin structure and includes a magnetic disk device body 11 and a lid mechanism 12 according to an embodiment of the present invention.

The magnetic disk device main body 11 is provided with a frame 13 made of aluminum die cast, a magnetic disk cartridge mounting mechanism on the frame 13, a magnetic head mechanism (neither shown), and an upper surface of the frame 13, It has a shield cover 14 for covering the head mechanism and the like, a magnetic disk cartridge insertion port 15, and a front bezel 16 attached to the frame 13.

In the assembly of the magnetic disk device body 11, the shield cover 14 is attached last.

As shown in FIGS. 3 and 1, the magnetic disk cartridge insertion opening lid mechanism 12 includes a lid 20, a torsion coil spring 21, and a part of the shield cover 14.
It is a part of the front bezel 16.

The lid 20, the shield cover 14, and the front bezel 16 will be sequentially described below.

First, the lid 20 will be described.

As shown in FIG. 3, the lid 20 is a synthetic resin molded product, and has a substantially rectangular plate-shaped lid main body 22 and both longitudinal and longitudinal ends of the lid main body 22 in the height direction. (Z ₁ ,
Z ₂ direction) on, and a shaft 23, 24 parts of the upper side.

The lid body 22 includes a cutout portion 25 and concave portions 26, 2.
7 and inclined surface portions 28 and 29.

The notch 25 is formed at the center of the upper edge 22a of the lid body 22.

The recesses 26 and 27 are the back surface 22b of the lid body 22.
Of these, it is formed on the left and right sides of the notch 25.

As shown in FIG. 1, the recess 26 has an edge 26a and a side surface 26b on the upper side.

The upper side surface 26b is substantially perpendicular to the back surface 22b of the lid body 22. Side face 26b
However, as will be described later, this is to ensure that the hook piece is hooked (see FIG. 11).

The recess 27 has the same shape as the recess 26.

Further, the concave portion 26 has a lid 2 as described later.
It has a size and a depth that can relatively accommodate a tongue piece 44 described later when the 0 is opened.

Similarly, the recess 26 has such a size and depth that it can relatively accommodate a tongue piece 45 described later when the lid 20 is opened.

The inclined surface portions 28 and 29 are recessed portions 26 and 2 respectively.
The portion corresponding to 7 is formed from the surface 22c of the lid main body 22 to the upper edge 22a.

As shown in FIG. 5, the angle α of the inclined surface portion 28 with respect to the horizontal plane is smaller than the angle β of the surface 22d when the inclined surface portion 28 is not formed.

The inclined surface portion 29 is also formed similarly to the above-mentioned inclined surface portion 28.

Further, a notch 30 is formed in a portion of the upper edge 22a of the lid main body 22 on the left side of the inclined surface portion 28.

A notch 31 is formed in the upper edge 22a of the lid main body 22 at the right side of the inclined surface portion 29.

Next, the shield cover 14 will be described.

As shown in FIG. 3, the shield cover 14
Is an aluminum plate having a thickness of about 0.3 mm, which is pressed. The edge 40 on the side of the front bezel 16 has a central tongue portion 41 at the center thereof, a left tongue portion 42 at a portion closer to the left side, The right side tongue 43 and the central tongue 41 at the right side portion
The left intermediate tongue portion 44 is provided between the left tongue portion 42 and the left tongue portion 42, and the right intermediate tongue portion 45 is provided between the central tongue portion 41 and the right tongue portion 43.

The tongues 42 and 43 are V-shaped and reinforced when viewed from the front.

The left intermediate tongue portion 44 is, as shown in an enlarged view in FIG. 1, left and right receiving pieces 44 _-1 , 44 as receiving portions.
_-2 and a central hook piece _44-3 as a hook portion. The receiving pieces 44 _-1 , 44 _{-2 form} an angle γ with respect to the horizontal plane.
It is inclined (about 60 degrees). The hook piece 44 _-3 is inclined at an angle θ (about 30 degrees) with respect to the horizontal plane.

The tip 44 _-3a hook pieces 44 _-3, receiving pieces 44 _-1, 44 _-2 tip 44 _-1a, from 44 _-2a, the X ₂ direction, located in a position offset by the dimension a There is.

The right intermediate tongue portion 45 is also the left intermediate tongue portion 4 described above.
4 has the same configuration as that of the receiving piece 45. _-1, 45_-2And foot
Scrap 45_-3Having.

Here, the angle θ of the hook pieces 44 _-3 and 45 _-3
Is set at an angle (approximately 30 degrees) closer to the horizontal than the inclination of the receiving pieces 44 _-1 , 44 _-2 , 45 _-1 , 45 _-2 , and the hook pieces 44
_-3 , 45 _-3 tips 44 _-3a , 45 _-3a are receiving pieces 44 _-1 ,
44 _-2 , 45 _-1 , 45 _-2 is arranged so that it protrudes in the X ₂ direction from the tips 44 _-1a , 44 _-2a of the hook piece 44 _{-3 on} the side surface 26b of the recessed portions 26, 27 as will be described later. , 45 _-3 so that they can be easily locked (see FIG. 11).

Tongue portion 44, concave portion 27 and inclined surface portion 28,
In addition, the tongue portion 45 and the concave portion 28 and the inclined surface 28 are located so as to face each other in the assembled state of the magnetic disk device 10.

Next, the front bezel 16 will be described.

As shown in FIG. 3, the front bezel 16
Is a synthetic resin molded product, has a substantially rectangular frame shape, and has an upper beam portion 50 and a lower beam portion 51, and the magnetic disk cartridge insertion port 15 is provided between the beam portions 50 and 51. Have.

On the lower surface at the center of the upper beam portion 50, the protruding step portion 5 is formed.
2 is formed.

Further, a slit 53 is formed at the location of the convex step portion 52.

Further, square holes 54 and 55 are formed in the upper beam portion 50 at the portions on the left and right sides of the back surface.

The upper beam portion 50 has a convex step portion 56 that is convex downward at the position of the square hole 54.

The upper beam portion 50 also has a convex step portion (not shown) protruding downward at the position of the square hole 55.

Next, the mounting state of the lid 20, the shield cover 14, and the front bezel 16 and their mutual relationship will be described.

The lid 20 has shafts 23, 2 as shown in FIG.
4 is fitted and attached to the holes 60 and 61 on the front side of the frame 13, and the shafts 23 and 24 are centered in FIG.
It can be rotated in the directions of arrows A ₁ and A _{2 in the} middle.

In FIGS. 5, 6 and 7, point 0 is the center of rotation of the lid 20. The lid 20 is biased in the A ₂ direction by a torsion coil spring 21. A front bezel 16 is fitted and attached to the front side of the frame 13.

The shield cover 14 is attached to the frame 13 by fitting the tongue piece 41 and the like to the front bezel 16.

As shown in FIGS. 6 and 4, the tongue portion 41 is fitted in the slit 53.

As shown in FIGS. 7 and 4, the tongue portion 42 is fitted in the square hole 54 and the tongue portion 43 is fitted in the square hole 55.

As a result, the edge 4 of the shield cover 14 is
The 0-side portion and the upper beam portion 50 of the front bezel 16 are mechanically reinforced with each other.

The lid 20 is urged by a spring 21 and its tip end side is pressed against the back surface of the lower beam portion 51 to be in a vertical rotating position, that is, in a closed state, and the magnetic disk cartridge insertion port 15 is closed. ing.

[Relationship Between Lid 20 and Convex Step 52] As shown in FIG. 6, the convex step 52 is fitted in the notch 25.

Of the upper beam portion 50, the convex step portion 52 is reinforced by the tongue portion 41 of the shield cover 14.

[Relationship Between Lid 20 and Convex Step 56] As shown in FIG. 7, the convex step 56 is fitted in the notch 30.

The tongue portion 42 of the shield cover 14 reinforces the portion of the upper beam portion 50 which is the convex step portion 56.

In the notch 31 near the shaft 24 of the lid 20,
Similarly to the above, the convex step portion (not shown) of the upper beam portion 50 is fitted.

[Relationship Between Lid 20 and Left Intermediate Tongue 44] As shown in FIG. 5, the left intermediate tongue 44 is a portion of the back surface 22b of the lid main body 22 where the recess 26 is formed. , Faces the portion near the upper edge 22a.

The receiving piece 44 _-2 (44 _-1 ) and the edge 2 of the recess 26
6a are separated by a dimension b (about 1 mm).

The tip side of the hook piece 44 _-3 protrudes from the recess 26 by a dimension c (about 0.3 mm).

The relationship between the lid 20 and the right intermediate tongue portion 45 is the same as above.

Next, the operation when the lid 20 is pushed open by the magnetic disk cartridge 6 as the recording medium container to be inserted will be described.

When a force F ₁ is applied to the lid 20 in FIG. 6, for example, the user places the magnetic disk cartridge 6 in a horizontal direction on a portion of the insertion port 15 near the lower beam portion 51. When inserted, that is, the magnetic disk cartridge 6
This is the case when is inserted normally.

The lid 20 resists the spring 21 and the shafts 23, 2
It is smoothly rotated in the direction of arrow A _{2 about} 4 and pushed open.

The lid 20 is rotated to a maximum horizontal position shown in FIG.

The receiving pieces 44 _-1 , _44-2 and the hook piece 44 _-3 are relatively inserted into the recess 26, so that the lid 2
0 is rotated to the above position without any trouble.

When force F ₂ is applied to the lid 20 in FIG. 6, for example, the case where the user inserts the magnetic disk cartridge 6 into a portion of the insertion opening 15 near the upper beam portion 50 is applicable. .

The lid main body 22 is pushed at the portion near the upper edge 22a, and as shown in FIG.
Bend in the X ₁ direction so that the inner side of 1 becomes convex.

However, as shown in FIG. 9, when the lid body 22 is slightly bent, the edge 26a of the recess 26 of the back surface 22b of the lid body 22 contacts the receiving pieces 44 _-1 , 44 _-2 . Contact. Similarly, the edge portion of the recess 27 abuts the receiving pieces 45 _-1 , 45 _-2 . As a result, the lid body 22 is restricted from further bending in the X ₁ direction.

Therefore, the shafts 23 and 24 do not come out from the holes 60 and 61, and the lid 20 does not fall off.

Further, the lid body 22 is not broken and damaged.

Further, when the lid 20 rotates in the A ₁ direction, the receiving pieces 44 _-1 , 44 _-2 , 45 _-1 , 45 _-2 and the hook pieces 44 _-3 , 45 _-3 have the recesses 26. , 27 relative to each other. As a result, the lid 20 is smoothly rotated to a position horizontal in the A ₁ direction. In this way, the lid 20
The lid body 22 is smoothly rotated in the A ₁ direction with the bending of the lid body 22 limited.

When the force F ₃ in FIG. 6 acts on the lid 20, for example, the case where the user inserts the magnetic disk cartridge 6 into the insertion opening 15 obliquely upward is applicable.

The lid main body 22 is bent so as to be convex in the Z ₁ direction (upward direction) and is also bent so as to be convex in the X ₁ direction.

The bending in the Z ₁ direction is limited when the bottom surface 25a of the cutout portion 25 is in contact with the lower surface of the convex step portion 52, as shown in FIG. 10 (A).

As shown in FIG. 10B, the bending in the X ₁ direction is caused by the edge 2 of the recess 26 on the back surface 22b of the lid body 22.
The portion 6a is restricted in a state of being in contact with the receiving pieces 44 _-1 , _44-2 .

As a result, the lid 20 is smoothly rotated in the A ₁ direction.

When the force F ₄ is applied to the lid 20 in FIG. 6, for example, the case where the user inserts the magnetic disk cartridge 6 into the insertion opening 15 obliquely downward is applicable.

The lid main body 22 is bent so as to be convex in the Z ₂ direction (downward) and is also bent so as to be convex in the X ₁ direction.

[0094] As shown in FIG. 10, Z for the _two directions, the cover body 122 where flexed slightly, the side surface 26b of the recess 26, the hook piece 44 hits the _-3, and the edge of the recess 27 hook elements 45 _- Upon hitting ₃ , the lid main body 22 is locked by the hook pieces 44 _-3 , 45 _-3 (in some cases, the receiving piece 44 _-1, etc.) to restrict further bending.

Also in the X ₁ direction, the lid main body 22 is received by the hook pieces 44 _-3 and 45 _-3 , and further bending is restricted.

As a result, first, the lid main body 22 goes over the lower sides of the tongue portions 44, 45 as shown by the arrow B in FIG. 11, and as shown by the two-dot chain line, the tongue portion 44, It can be prevented from entering the back side of 45.

Secondly, the lid 20 is smoothly rotated in the A ₁ direction.

Therefore, under the condition that the lid main body 22 has a thin shape and is easily bent, the lid 20 is smoothly pushed open no matter how the magnetic disk cartridge is inserted.

Next, as shown in FIG. 12 (A), if the lid main body 22 has entered the back side of the tongue portions 44, 45 for some reason, the lid main body 45 will automatically push the tongue portions 44, 45.
The operation of exiting from the back side of 45 will be described.

In the state shown in FIG. 12A, the inclined portion 28 is in contact with the hook piece 44 _-3 .

A linear force is generated in the lid body 22 by the elastic force of the lid body 22 itself. That is, the lid body 2
A force in the X ₂ direction acts on the portion of the inclined surface portion 28 of ₂ .

Here, the inclination of the inclined surface portion 28 is gentle, and the inclination of the hook piece 44 _-3 is also gentle.

For this reason, the inclined surface portion 28 has the hook piece 44.
_-3 , the lid main body 22 slides through the state of FIG. 12 (B) to the state of FIG. 12 (C), and the tongue portion 44 moves by itself.
It comes out from the back side of and becomes normal.

Further, the present invention is not limited to the above embodiment, but can be applied to the lid portion of the insertion port into which the magneto-optical disk cartridge or the magnetic tape cassette is inserted.

The tongues 44 and 45 may be provided on the upper beam portion 50 of the front bezel.

[0106]

As described above, according to the invention of claim 1, it has the following features. When the lid is pushed by the recording medium container into which the lid is inserted, the lid body does not excessively bend, so that it is possible to reliably prevent the lid from falling off or being damaged. The lid can be rotated smoothly and pushed open.

It is possible to reliably prevent the occurrence of an accident in which the lid main body does not bend excessively downward and thus the lid main body goes over the lower side of the receiving portion and enters the back side of the receiving portion.

By the above, the reliability of the operation of pushing the lid open by the recording medium container can be improved.

According to the second aspect of the present invention, the hook portion can be locked more reliably, and thus the occurrence of an accident in which the lid body gets into the back side of the receiving portion can be more reliably prevented. I can.

According to the third aspect of the invention, the lid mechanism can be completed by finally attaching the shield cover, and therefore, the assemblability of the lid mechanism can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a main part of a lid mechanism for a magnetic disk cartridge insertion slot according to an embodiment of the present invention.

FIG. 2 is a perspective view of a magnetic disk device to which the lid mechanism of FIG. 1 is applied.

FIG. 3 is an exploded perspective view of the lid mechanism in FIG.

FIG. 4 is a plan view of a lid mechanism in FIG.

5 is an enlarged cross-sectional view taken along the line VV in FIG.

6 is an enlarged sectional view taken along the line VI-VI in FIG.

FIG. 7 is an enlarged cross-sectional view taken along the line VII-VII in FIG.

FIG. 8 is a diagram showing a state where the lid is pushed and expanded in FIG.

FIG. 9 is a view for explaining the operation of limiting the bending of the lid body in the X ₁ direction.

FIG. 10 is a view for explaining the operation of limiting the bending of the lid body in the Z ₁ direction and the bending in the X ₁ direction.

FIG. 11 is a view for explaining the operation of limiting the bending of the lid body in the Z ₂ direction.

FIG. 12 is a view for explaining the operation of the lid main body that has entered the back side of the receiving section to be pulled out from the back side of the receiving section by itself.

FIG. 13 is a diagram showing an example of a conventional lid mechanism.

FIG. 14 is a diagram showing another example of a conventional lid mechanism.

15 is a view showing that the lid bends in the lid mechanism of FIG.

FIG. 16 is a view showing a lid mechanism previously filed by the applicant.

[Explanation of symbols]

6 Magnetic Disk Cartridge 10 Magnetic Disk Device 11 Magnetic Disk Device Main Body 12 Lid Mechanism 13 Frame 14 Shield Cover 15 Magnetic Disk Cartridge Insertion Portion 16 Front Bezel 20 Lid 21 Torsion Coil Spring 22 Lid Main Body 22a Upper Edge 22b Backside 22c Surface 23, 24 Shaft 25 Notch 26, 27 Recess 26a Edge 26b Side 28, 29 Inclined surface 30, 31 Notch 40 Edge 41 Central tongue 42 Left tongue 43 Right tongue 44 Left middle tongue 45 Right middle tongue 44 _-1 , 44 _-2 , 45 _-1 , 45 _-2 Receiving piece 44 _-3 , 45 _-3 Hook piece 50 Upper beam portion 51 Lower beam portion 52 Convex step portion 53 Slit 54, 55 Square hole 56 Convex step portion 60, 61 hole

Claims (3)

[Claims] 1. A lid body having a substantially rectangular plate shape, and portions on both ends in the longitudinal direction of the lid body are rotatably supported by a recording medium recording / reproducing apparatus body, and usually, In a lid mechanism for a recording medium container insertion opening, which has a lid that closes the insertion port into which the recording medium container is inserted and that is pushed open by the recording medium container that is inserted, facing the back surface of the lid body. When the lid body is bent inwardly of the recording medium recording / reproducing apparatus body, the receiving portion that receives a part of the back surface of the lid body and the lid body is bent downward. A lid mechanism for a recording medium container insertion opening, wherein the lid body has a hook portion for locking a part of the lid body. 2. A lid body having a substantially rectangular plate shape, and both end portions in the longitudinal direction of the lid body are rotatably supported by the recording medium recording / reproducing apparatus body, and normally, In a lid mechanism of a recording medium container insertion opening, which is provided with a lid that closes an insertion port into which the recording medium container is inserted and is opened by the inserted recording medium container, the lid is a back surface of the lid body. In addition, the recording medium recording / reproducing apparatus main body is opposed to the back surface of the lid main body, and the lid main body bends toward the inside of the recording medium recording / reproducing apparatus main body. The receiving portion that receives a part of the back surface of the lid body and the concave portion of the lid body when the lid body is bent, and locks the concave portion when the lid body is bent downward. Recording having a structure having a hook portion A lid mechanism for the medium container insertion port. 3. The receiving portion and the hook portion are constituted by a tongue portion formed at an edge portion of a shield cover attached so as to cover an upper surface of the main body of the recording medium recording / reproducing apparatus. The lid mechanism for the recording medium container insertion slot according to claim 1 or 2.