JP2000296897A - Storing case for magnetic tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lid from being deformed even when a magnetic tape cassette is erroneously inserted and further prevent its deformation against shock produced when the magnetic tape cassette drops. SOLUTION: A flat plate segment 4 is formed with a reel engaging rib 16a engaged with a hub 115 of a tape reel 110, and a notch engaging rib 17 engaged with a rear notch 95 of cassette from lids 91, 97 of a lower half segment 85. The notch engaging rib 17 has its height set to less than a height of the reel engaging rib 16a. When a distance between a reference ring l12b of a lower reel 112 and a circular opening 87b of the lower half segment 85 is set as (b) and a distance between an engaging hole B of a hub 115 and a reel engaging rib 16a is set as (a), a relation of a>b can be established and a distance (c) between both side surfaces of the cassette and the rear surface of the cassette and a side wall segment 5 of a storing segment 1 opposing against these surfaces, and a distance (c) between the notch 95 and the notch engaging rib 17 are set to be equal from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cassette storage case (hereinafter, referred to as a magnetic tape cassette storage case).
Simply referred to as a "storage case." ). More specifically, the present invention relates to a storage case provided with a storage portion for storing a magnetic tape cassette, a lid covering the storage portion, and a hinge for connecting the storage portion and the lid so that the lid can be opened and closed.

[0002]

2. Description of the Related Art Various types of storage cases as described above have been proposed according to the form of a magnetic tape cassette to be stored. Hereinafter, an example of a conventional storage case and a digital video cassette (DVC) used in a broadcasting station will be described with reference to FIGS. 8 and 9.

The storage case 50 shown in FIG. 8 is a storage unit 1 for storing a magnetic tape cassette 81 shown in FIG.
And a lid portion 2 that covers the storage portion 1 and a hinge portion 3 that rotatably connects the storage portion 1 and the lid portion 2. The storage portion 1 includes a first flat plate portion 4, a first side wall portion 5 integrally formed on an outer peripheral portion of the first flat plate portion 4, and a reel engagement formed from a slightly rear end of the first flat plate portion 4. Ribs 6a, 6b,
An opening locking rib 7 having a V-shaped cross section formed slightly from the front end of the first flat plate portion 4 is provided. Then, when the magnetic tape cassette 81 shown in FIG. 9 is stored, when properly stored, the magnetic tape cassette 81 is loosely fitted in the first side wall portion 5 as shown by an imaginary line in FIG.

The lid 2 has a second flat plate portion 8 and a second side wall portion 9 integrally formed on three outer peripheral portions. The hinge portion 3 has thin grooves 1 on both sides of the third flat plate portion 10, respectively.
0a, 10b are formed, and the grooves 10a, 10b
Thereby, the storage part 1 and the lid part 2 can be closed like a book. Then, when the storage case 50 is closed, the first side wall 5 and the second side wall 9 are combined in a state parallel to each other.

On the outside of the first side wall 5 constituting the storage section 1, there is provided an overhang 4a in which a part of the first flat plate 4 is formed in an overhang shape. When the storage part 1 and the lid part 2 are closed, the second part of the lid part 2 is placed outside the first side wall part 5 of the storage part 1.
Although the side wall portion 9 is covered, the provision of the overhang portion 4a prevents the storage portion 1 from penetrating into the lid portion 2 and keeps the entire storage case at a constant thickness.

Further, a concave locking portion 5a is formed on the outer surface of the first side wall portion 5, and the storage portion 1 and the lid portion 2 are closed on the inner side surface of the second side wall portion 9. Sometimes, a locking projection 9a is formed at a position corresponding to the locking portion 5a. Therefore, when the storage part 1 and the lid part 2 are closed, the locking part 5
The locking projection 9a is locked to a, thereby preventing accidental opening movement of the storage section 1 and the lid section 2.

The first side wall 5 has engaging recesses 11a, 11
b are formed, and the same number of positioning ribs 62a and 62b as the number of engagement recesses are provided on the inner side surface of the second side wall portion 9. When the storage case is closed, the engaging recesses 11a and 11b are respectively positioned by the positioning ribs 62b and 6b.
2b. Due to these engagements, the first side wall 5 and the second side wall 9 do not move in the direction parallel to the side walls. When closing the storage case, first, the engaging recess 1 is used.
Since the positioning ribs 62a, 62b are inserted into 1a, 11b and positioning between the members is performed, the locking projections 9a,
9b and the locking portions 5a, 5b can be reliably engaged, and thus the lid 2 can be positioned at an appropriate position.

[0008] A plurality of storage section side cassette holding members 13 are provided between the inner side face of the first flat plate section 4 and the inner side face of the first side wall section 5. Similarly, a plurality of lid-side cassette holding members 14 are provided between the inner side surface of the second flat plate portion 8 and the inner side surface of the second side wall portion 9. The magnetic tape cassette 81 is stored in the storage case 50 by the cassette holding members 13 and 14, and when the storage case 50 is closed, the magnetic tape cassette 81 and the first flat plate portion 4 are closed.
Normally, the first and second flat plate portions 8 and the first and second side wall portions 5 and 9 do not directly touch each other.

Next, the magnetic tape cassette 81 will be described with reference to FIG. FIG. 9 is a perspective view of the magnetic tape cassette 81 as viewed from the bottom, in which the upper half 83 is on the lower side and the lower half 85 is on the upper side. Circular openings 87a and 87b are formed at two places in the lower half 85, and reference rings 89a and 89b are formed on the lower reel of the tape reel around which the magnetic tape is wound, and serve as references for dimensions.
Is exposed.

An outer lid 91, a top lid 97 and an inner lid (not shown) are rotatably provided on the front side of the magnetic tape cassette 81, and when mounted on a VTR or the like, an arrow A in FIG. As shown by, the magnetic tape is pulled out after the outer lid 91 rotates. In addition, a concave front opening 93 is formed at a substantially central portion inside the outer lid 91 so as to cut out the upper and lower halves 83 and 85, and a substantially fan-shaped concave is formed at one end of the front opening 93. Is formed. The step 95 is formed at the rear of the cassette from the top lid 97.

When the magnetic tape cassette 81 is stored in the storage case 50, the magnetic tape cassette 81 is fitted into the side wall 5 as shown by an imaginary line in FIG. 7 in such a manner that the tapes are inserted into the circular engagement holes B formed in the center of the hub of the tape reel and pushed in by inserting the reel locking ribs 6a and 6b. It is stored in a storage case 50.

[0012]

However, with the configuration of the storage case 50, the following problems may occur when the magnetic tape cassette 81 is stored. That is, as shown in FIG. 10, when the magnetic tape cassette 81 is inserted and the front and back sides of the cassette are mistakenly inserted, the top lid 97 is attached to the opening locking portion 7a of the opening locking rib 7.
Was sometimes pressed. When the top lid 97 is pressed, the top lid 97, and furthermore, the outer lid 91 and the inner lid (not shown) connected to the top lid 97 are deformed. It could be damaged. Since these lids have a function of covering and protecting the magnetic tape, there is a possibility that the magnetic tape may be damaged due to deformation of the lid.

Further, as shown in FIG. 11, even if the magnetic tape cassette 81 is properly inserted, if it falls in this state, the tape reel 110 will move.
Then, the reel locking ribs 6a and 6b collide with the engaging holes B formed in the hub 115 of the tape reel 110, and there is a possibility that an excessive load is applied to the reel locking ribs 6a and 6b. . If such an excessive load acts repeatedly, the ribs for reel locking may be peeled off in some cases.

In view of such circumstances, the present invention provides a storage case which can prevent deformation of a lid even when a magnetic tape cassette is erroneously inserted, and can prevent deformation due to an impact when dropped. The purpose is to do.

[0015]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a storage unit for storing a magnetic tape cassette, a lid covering the storage unit, and a hinge for connecting the storage unit and the lid so as to be openable and closable. Wherein the housing portion has a flat plate portion and a side wall provided on the outer peripheral portion of the flat plate portion.In the magnetic tape cassette storage case, the flat plate portion has an engagement hole of a hub of a tape reel. A rib for engaging the reel and a rib for engaging the concave portion that engages with the concave portion formed at the rear of the cassette from the lid of the lower half are formed. The rib for engaging the concave portion has a height. Between the reference ring of the lower reel constituting the tape reel and a circular opening formed in the lower half of the outer periphery of the reference ring. B is the distance of When the distance between the engagement hole of the reel and the reel locking rib is a, a relationship of a> b is established, and both side surfaces of the cassette and the rear surface of the cassette, and the side wall portion of the storage portion facing these surfaces, And the distance c between the concave portion and the concave portion locking rib are set to be equal to each other.

According to the above construction of the present invention, since the concave portion locking rib which engages with the concave portion of the lower half when the cassette is properly inserted is formed at the rear of the cassette with respect to the lid, the front and back of the cassette can be mistaken. Do not touch the lid that covers the magnetic tape when inserted incorrectly. Therefore, even if the user mistakenly inserts the cassette front and back into the storage portion of the storage case, the lid does not abut on the concave portion locking rib.
Lid deformation and damage can be prevented, and the magnetic tape can be protected.

Further, the height of the recess locking rib is set to be equal to or less than the height of the reel locking rib for locking the hub of the reel around which the magnetic tape is wound. Therefore, since the height of the recess locking rib is not set so high, even if the user inserts into the storage portion of the storage case by shifting the cassette from the proper position to the rear, though the front and back are correct, the lid (inner lid) ) Is prevented from being deformed and damaged. Furthermore, even if the front and back of the cassette are mistaken, even if it is shifted from the appropriate position in the front and rear direction of the cassette and inserted into the storage part of the storage case,
The deformation and damage of the lid (top lid) are prevented.

The distance b between the reference ring of the lower reel and the circular opening formed in the lower half is set smaller than the distance a between the engagement hole of the hub and the rib for locking the reel. I have. Therefore, even if the storage case in which the cassette is stored falls, the reel reference ring first comes into contact with the wall of the circular opening of the lower half to reduce the impact, so that an excessive load does not act on the reel regulating rib. .

Further, the distance c between the side surfaces and the rear surface of the cassette and the side wall of the storage portion facing these surfaces and the distance c between the recess and the recess locking rib.
Are equal, the gaps at the portions where the storage case and the cassette are in contact are in the same state. Therefore, the load applied during the vibration becomes uniform, and the generation of scratches and powder due to the friction between the storage case and the cassette can be dispersed.

[0020]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention.
It is a perspective view of storage case 20 for magnetic tapes concerning an embodiment. The same components as those of the conventional storage case 50 will be described with the same reference numerals, and the description thereof will be omitted or simplified.

The storage case 20 of the first embodiment is also formed by integrally molding synthetic resin, and has a configuration in which the storage section 1 and the lid section 2 are connected via the hinge section 3. Storage unit 1
The first flat plate portion 4 and the side wall portion 5 formed integrally with the outer peripheral portion thereof, the V-shaped cross-section recess locking rib 17 formed near the front end portion of the first flat plate portion 4, and the magnetic tape cassette A pair of reel locking ribs 1 that engage with the 81 reel hub
6a and 16b. When the magnetic tape cassette 81 shown in the conventional example is stored, if it is properly stored, it is loosely fitted in the side wall 5 as shown by the imaginary line in FIG.

Here, the recess locking rib 17 will be described. The recess locking rib 17 is not fitted in the front opening 93 shown in FIG. 9 but is fitted in the step 95. Therefore, the height of the recess locking rib 17 is set to be substantially the same as the depth of the step 95, and the curvature of the side surface of the recess locking rib 17 is also substantially the same as the curvature of the edge of the step 95. The curvatures are set to be the same. Since the depth of the engagement hole B shown in FIG. 7 is deeper than the depth of the step portion 95, the height of the recess locking rib 17 is set to be equal to or less than the height of the reel locking ribs 16a and 16b. Have been.
The recess locking rib 17 is formed rearward of the cassette from the top lid 97.

When the magnetic tape cassette 51 is stored in the storage case 20 of the present invention, the front opening 93 is turned downward, and the step 95 is opposed to the recess locking rib 17, opposite to the direction shown in FIG. And the magnetic tape cassette 81 is inserted into the side wall 5 in such a direction that the reel locking ribs 16a and 16b face the engaging hole B.

Here, as shown in FIG. 2A, when the magnetic tape cassette 81 is erroneously inserted by mistake in the front and back sides, even if the magnetic tape cassette 81 is pressed by closing the lid 2 further, even if the magnetic tape cassette 81 is pressed, Since the ribs 17 are formed at the rear of the cassette above the top lid 97, the top lid 97 and the recess locking ribs 17 do not abut as shown in FIG. 2B. Therefore, since the top lid 97 can be prevented from being deformed and damaged, the outer lid and the inner lid connected thereto can be prevented from being deformed and damaged, and the magnetic tape can be reliably protected.

Further, since the opening locking portion is not formed in the rib and the height of the recess locking rib 17 is set lower than in the conventional case, the user can use the magnetic tape cassette 81.
At the back of the cassette, ie, in the B direction (shown in FIG. 2A)
Even if it is inserted into the storage part 1, an excessive pressing force due to the high height of the rib 7 as shown in FIG. 10 is not applied. Therefore, deformation and damage of the top lid 97 are prevented. In addition, although the front and back are correct, even if it is incorrectly shifted in the direction B and inserted into the storage part 1 of the storage case 20, the height of the recess locking rib 17 is set low, so the inner surface of the top lid 97 is No excessive pressing force due to the height of the ribs acts on the inner lid connected to the inner lid, thereby preventing the deformation and damage of the inner lid.

Next, another characteristic configuration of the present invention will be described. FIG. 3 is a diagram showing a state in which the magnetic tape cassette is appropriately stored in the storage case, and FIG. 4 is a view of the storage case in FIG. As shown in FIG. 3, the reference ring 112b and the circular opening 87b formed in the lower half 85 of the lower reel 112 constituting the tape reel 111.
Is set to b. The hub 11
The distance between the engagement hole B of No. 5 and the reel locking rib 16a is set to a. The relationship between these distances a and b is
a> b is satisfied. When such a dimensional relationship is set, even if the storage case is dropped, first, the reel reference ring 112b is attached to the circular opening 87 of the lower half 85.
Collides with wall b. Then, after the impact due to the collision is reduced, the load due to the engagement hole B of the hub 115 acts on the reel regulating rib 16a, so that an excessive load does not act.

The distance between the rear surface of the cassette and the side wall 5 of the storage section 1 facing this surface is set to c, and the distance between the step 95 of the cassette and the rib 17 for locking the concave portion is set. The distance is also set to c. Further, as shown in FIG. 4, the distance between both side surfaces of the cassette and the side wall portion 5 of the storage unit 1 facing this surface is also set to c. That is, the gap between the storage case and the portion where the cassette contacts is set to be equal. Therefore, the load applied during the vibration becomes uniform, and the generation of scratches and powder due to the friction between the storage case and the cassette can be dispersed.

Next, a second embodiment of the present invention will be described. FIG. 5 is a perspective view of a storage case 41 for a beta cam according to the second embodiment of the present invention, and FIG. 6 is a rear view of a magnetic tape cassette 100 for the beta cam.

The storage case 41 shown in FIG. 5 includes a storage part 43 for storing the magnetic tape cassette 100 shown in FIG. 6, a lid part 45, and a hinge part 47. Storage section 43
Are a flat plate portion 51, a side wall portion 53 integrally formed on the outer periphery thereof, a reel locking ribs 55a and 55b formed slightly near the rear end of the flat plate portion 51, and a concave locking portion formed slightly near the front end. And a rib 57. When the magnetic tape cassette 100 is stored properly, the magnetic tape cassette 100 is loosely fitted in the side wall 53 as shown by the imaginary line in FIG.

Here, the recess locking ribs 57 will be described. The recess locking rib 57 has a flat plate shape, and is fitted into the front opening 103 which is the recess shown in FIG. The height of the recess locking rib 57 is set to be equal to or less than the height of the reel locking ribs 55a and 55b, and the side surface is formed along the flat portion 103p of the front opening 103. The recess locking rib 57 is formed at the rear of the cassette from the lid, and is set at a position where it does not come into contact with the single-sheet type lid 107 when the cassette is erroneously inserted with its front and back sides mistakenly. Therefore, according to the second embodiment as well, deformation and damage of the lid 107 can be prevented, so that the magnetic tape can be reliably protected.

FIG. 7 shows a modification of the second embodiment. The configuration other than that of the second embodiment is the same as that of the second embodiment except for the concave portion locking ribs 67, and the description thereof is omitted. As shown in FIG. 7, the concave portion locking rib 67, which is a characteristic configuration of the modified example,
It is composed of a flat plate portion 67b and a curved surface portion 67a, and is fitted into the front opening 103 shown in FIG. The height of the recess locking rib 67 is the same as the reel locking rib 55.
a, 55b or less, and the side surface of the front opening 103 along the flat portion 103p
7b, and the curved surface portion 67a has a side surface along the curved surface portion 103c. Also, the recess locking rib 67
Is set at a position where it does not come in contact with the single-piece lid 107 when the cassette is inserted incorrectly by mistake. Therefore, according to the present modification as well, deformation and damage of the lid 107 can be prevented, so that the magnetic tape can be reliably protected.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified. For example, the present invention can be applied to a magnetic tape cassette other than the DVC and the beta cam by appropriately changing the shape of the concave portion locking rib, and it is also possible to set the dimensional relationship as described above.

[0033]

As described above, the storage case for a magnetic tape cassette of the present invention has the following configurations and effects (1) to (4). (1) On the flat plate portion, there are formed a reel locking rib for engaging with the hub of the tape reel and a concave locking rib for engaging with a concave portion formed rearward of the cassette from the lower half lid. Therefore, even if the user mistakenly inserts the cassette into the storage section of the storage case by mistake, the lid does not abut against the concave portion locking rib, so that deformation and damage of the lid can be prevented and the magnetic tape can be protected. (2) The height of the recess locking rib is set to be equal to or less than the height of the reel locking rib. Therefore,
Since the height of the recess locking rib is not set so high, even if the user is incorrectly shifted from the appropriate position to the back of the cassette and inserted into the storage part of the storage case,
The deformation and damage of the lid (inner lid) are prevented. Furthermore, even if the front and back of the cassette are mistaken, the lid (top lid) is prevented from being deformed and damaged even if it is inserted into the storage portion of the storage case while being shifted from the proper position in the front-rear direction of the cassette. (3) The distance between the reference ring of the lower reel constituting the tape reel and the circular opening formed in the lower half of the outer periphery of the reference ring is defined as b, and the engagement hole of the hub is engaged with the reel. Assuming that the distance between the ribs is a, the relationship a> b holds. Therefore, even if the case containing the cassette falls, the reel reference ring first comes into contact with the wall of the circular opening of the lower half to reduce the impact, so that an excessive load does not act on the reel regulating rib. (4) The distance c between both sides of the cassette and the rear surface of the cassette and the side wall of the storage unit facing these surfaces and the distance c between the recess and the rib for locking the recess are set to be equal. . Therefore, the load applied during the vibration becomes uniform, and the generation of scratches and powder due to the friction between the storage case and the cassette can be dispersed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic tape cassette storage case according to a first embodiment of the present invention.

FIG. 2A shows a state when the magnetic tape cassette 81 is erroneously inserted in the wrong direction, and FIG. 2B shows a state when the lid is further closed from FIG.

FIG. 3 is a diagram showing a state in which a magnetic tape cassette is appropriately stored in a storage case.

4 is a view of the storage case of FIG. 3 as viewed from a P direction.

FIG. 5 is a perspective view of a storage case for a magnetic tape cassette according to a second embodiment of the present invention.

FIG. 6 is a rear view of the magnetic tape cassette for the beta cam.

FIG. 7 is a modified example of the magnetic tape cassette storage case of the second embodiment.

FIG. 8 is a perspective view showing an example of a conventional magnetic tape cassette storage case.

FIG. 9 is a perspective view of a DVC.

FIG. 10 is a side view of a state where the magnetic tape cassette is stored in the storage unit upside down.

FIG. 11 is a diagram showing a state where a magnetic tape cassette is properly inserted into a storage unit.

[Explanation of symbols]

1,43 housing part 2,45 lid part 3,47 hinge part 4 first flat plate part 5 first side wall part 6a, 6b, 16a, 16b, 55a, 55b rib for rib locking 17,57 rib for concave recess locking 20 , 41 Magnetic tape cassette storage case 87b Circular opening 95 Step 110 Tape reel 112b Reference ring 115 Hub B Engagement hole

Claims (1)

[Claims] 1. A storage section for storing a magnetic tape cassette, a lid covering the storage section, and a hinge for connecting the storage section and the lid so as to be openable and closable, wherein the storage section is a flat plate section. And a magnetic tape cassette storage case having a side wall provided on an outer peripheral portion of the flat plate portion, wherein the flat plate portion includes a reel locking rib that engages with an engagement hole of a hub of the tape reel, and a lower portion. A recess locking rib for engaging a recess formed behind the half lid with respect to the cassette is formed, and the height of the recess locking rib is not more than the height of the reel locking rib. A reference ring of a lower reel constituting the tape reel,
When the distance between the outer periphery of the reference ring and the circular opening formed in the lower half is b, and the distance between the engagement hole of the hub and the reel locking rib is a, a
> B, the distance c between the cassette side surfaces and the rear surface of the cassette and the side wall of the storage portion facing these surfaces, and the distance c between the recess and the recess locking rib. A storage case for a magnetic tape cassette, which is set to be equal.