JPH11250624A - Magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the loosening only by the simple improvement of the construction of a housed electronic component or its dummy component. SOLUTION: An IC board 10 in which management information data, etc., of the recorded contents of a magnetic tape are stored is incorporated by the cartridge case 1 of a magnetic tape cartridge M which is composed of an upper half case 3 and a lower half case 2. A flexible deformation part 31 which is pushed and energized by the inner wall 3b of the upper half case 3 is provided on the upper edge part of the IC board 10 which is fitted to the housing space 15 of the cartridge case 1. The lower edge part of the IC board 10 has an inclined surface 35 inclined in a thicknesswise direction. A support groove 37 with a wedge-shaped cross-section which has an inclined surface 36 corresponding to the inclined surface 35 of the lower edge part is formed on the bottom of the housing space 15. The IC board 10 is held and fixed elastically by the cartridge case 1 and, further, its lower edge part is supported by the support groove 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge to which an electronic component for storing management information of recorded contents is attached separately from a magnetic tape for recording.

[0002]

2. Description of the Related Art Conventionally, in Japanese Patent Application Laid-Open No. 63-168889, an electronic component for storing management information of recorded contents and the like is separately mounted on a cartridge case separately from a magnetic tape for signal recording. 2. Description of the Related Art There is known a magnetic tape cartridge configured to transmit and receive a signal of management information between a recording / reproducing device (hard device) and an electronic component via a contact point of an exposed electronic component.

[0003]

Incidentally, this type of magnetic tape cartridge often employs a structure in which an electronic component separately prepared later is fitted into a predetermined position of the cartridge case. In this state, the electronic parts may rattle, generating abnormal noise and abrasion powder. In particular, in the case of a magnetic tape cartridge on which digital signals are recorded, if such abrasion powder adheres to the magnetic tape, a recording error such as a loss of a recording signal may be caused, or a contact error with a contact on the deck side may occur. Was.

If special fixing means is provided between the cartridge case and the electronic component in order to prevent the above-mentioned rattling of the electronic component, the suitability for assembling the electronic component and the mounting stability are reduced. This will lower the cost and increase the cost. Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide an inexpensive and good magnetic tape cartridge that can prevent rattling by simply improving the structure of an electronic component to be housed or its dummy component. To provide.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to assemble a cartridge case in which an electronic component for storing management information of recording contents of a magnetic tape or the like or a dummy component thereof is composed of an upper half and a lower half. In the magnetic tape cartridge to be provided, a flexible deformable portion which is pressed and urged by the inner wall surface of the upper half is provided at an upper edge portion of the electronic component or the dummy component to be fitted in the accommodation space of the cartridge case. A lower edge of the electronic component or its dummy component is formed in a wedge-shaped cross section having an inclined surface inclined in a plate thickness direction, and the lower edge is fitted to a bottom portion in a housing space of the lower half. This is achieved by a magnetic tape cartridge, wherein a support groove having a wedge-shaped cross section is formed.

According to the above construction, when the electronic component or the dummy component is assembled at a predetermined position of the lower half, and the upper half is assembled and fixed to the lower half of the cartridge case, the flexible deformable portion is elastically deformed. Therefore, the electronic component or the dummy component is elastically held and fixed to the cartridge case by the elastic force of the flexible deforming portion that is about to be restored.

In addition, a lower edge of the electronic component or the dummy component is formed in a wedge-shaped cross section having an inclined surface inclined in a plate thickness direction, and a bottom of the lower half in the accommodation space of the lower half has By forming the support groove having a wedge-shaped cross section in which the lower edge is fitted, the lower edge of the electronic component or the dummy component can be obtained simply by assembling the electronic component or the dummy component in the accommodation space of the lower half. Are supported by the support grooves, so that play in the plate thickness direction can be easily prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. 1 is an enlarged exploded perspective view of a main part of a magnetic tape cartridge according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an external perspective view showing the entire configuration of the magnetic tape cartridge, and FIG. FIG. 5 is a cross-sectional view taken along line AA of FIG. 2, and FIGS. 6 and 7 are cross-sectional views of main parts according to another embodiment.

First, the outline of the magnetic tape cartridge M will be described with reference to FIG. Magnetic tape cartridge M
Is a cartridge housing a magnetic tape (not shown) in a cartridge case 1 as a resin molded product. The cartridge case 1 has a lower half 2 and an upper half 3. At one end of the rear end walls 2 a, 3 a, a management data storage unit 5 for storing management information of recording contents of a magnetic tape and the like is provided. And the erroneous erasure prevention unit 6 are provided adjacent to each other. The erroneous erasure prevention unit 6 is provided with an opening 2 provided in the rear end wall 3a of the upper half 3.
1, the erroneous erasure preventing piece 20 exposing the claw portion 22 is formed.

The management data storage section 5 is provided as needed, and is not provided when not needed. In the illustrated magnetic tape cartridge M, the management data storage unit 5 is configured by assembling an IC board (electronic component) inside the rear end wall of the cartridge case 1.
In the rear end wall 2a of the lower half 2, a plurality of openings 11 for exposing a plurality of contacts 12 of the IC board 10 to the outside are provided corresponding to the contacts 12.

If the management data storage section 5 is not provided, a dummy board 40 as shown in FIG. 4 is mounted as a substitute instead of mounting the IC board 10. The dummy board 40 is provided to close the contact opening 11 of the lower half 2 and has almost the same outer shape as the IC board 10. However, since the main purpose is only to close the opening 11, it is also possible to use a size reduced to a size corresponding to the size behind the opening 11 as necessary.

FIG. 1 shows the management data storage section 5 in an enlarged manner and partially cut away for easy understanding. The IC board 10 is provided with a circuit 14 and a contact 12 on the surface of a substantially L-shaped flat substrate 13.
The contact 12 is exposed through the opening 11 provided in the rear end wall 2a of the lower half 2 when fitted into the housing space 15 which is an electronic component assembling position provided along the rear end wall 2a. The contact on the hardware device side can be brought into contact with the contact 12 through the opening 11.

Also, at the upper edge of the IC board 10,
A cantilever-shaped flexible deformable portion 31 constituted by a cutout groove 32 cut deep from the side along the upper edge is provided, and a protrusion 34 is provided at a distal end portion of the flexible deformable portion 31. It is protruding. Further, the lower edge of the IC board 10 is formed in a wedge-shaped cross section having an inclined surface 35 inclined in the thickness direction.

An accommodation space 15 for accommodating the IC board 10 is defined by the rear end wall 2a and a partition wall 16 parallel to the rear end wall 2a.
The gap between a and the partition wall 16 is wider than the thickness of the IC board 10. As shown in FIG. 5, a support groove 37 having a wedge-shaped cross section having an inclined surface 36 facing the inclined surface 35 of the lower edge portion is formed at the bottom in the accommodation space 15. The lower edge of the IC board 10 is fitted. The inclined surface 36 is formed so that the support groove 37 is shallow on the rear end wall 2a side and deep on the partition wall 16 side. Behind the partition wall 16, a storage space 28 for the erroneous erasure prevention piece 20 defined by a rear wall 29 behind the partition wall 16 is provided next to the partition wall 16.

As shown in FIG. 2, when the IC board 10 (or the dummy board 40) is fitted in the housing space 15 sandwiched between the partition wall 16 and the rear end wall 2a, The upper portion protrudes from the upper surface of the lower half 2, but when the upper half 3 is placed and fixed on the lower half, the upper edge of the flexible deformable portion 31 of the IC board 10 is substantially the same as the inner wall surface 3b of the upper half 3. The height is slightly lower than the inner wall surface 3b, and only the protrusion 34 protruding from the flexible deformation portion 31 is higher than the position of the inner wall surface 3b of the upper half 3.

First, when the IC board 10 is fitted into the housing space 15 of the lower half 2, the partition wall 16 is inserted.
The gap between the lower half 2 and the rear end wall 2a is wider than the thickness of the IC board 10, so that the IC board 10 can be smoothly inserted into the accommodation space 15. Therefore, the IC board 10 is not deformed due to excessive force applied at the time of insertion, and there is no trouble in inserting work.

Next, as shown in FIGS. 3 and 5, when the upper half 3 is placed on the upper surface of the lower half 2 and fixed by applying a force from above, the upper half 3 protrudes from the flexible deformation portion 31 of the IC board 10. The projection 34 is pressed downward by the inner wall surface 3b in the upper half 3, so that the distal end portion of the flexible deformable portion 31 is bent downward and the inclined surface 35 of the lower edge portion is in the accommodation space 1.
5 is pressed by the inclined surface 36 of the support groove 37 formed at the bottom of the inside 5 and is shifted to the partition wall 16 side.

That is, in the magnetic tape cartridge M of this embodiment, the IC board 10 is
When the upper half 3 is assembled and fixed to the lower half 2 after the insertion into the lower half 5, the flexible deformable portion 31 is elastically deformed.
The IC board 10 is elastically clamped and fixed to the cartridge case 1 by the elastic force of the flexible deformation portion 31 which is to be restored. Therefore, the IC board 10 does not rattle in the cartridge case 1 and generation of abnormal noise and generation of abrasion powder are prevented.

Further, the IC board 10 according to the present embodiment
The upper half 3 and the lower half 2 are formed by forming an inclined surface 35 at the lower edge and facing the inclined surface 36 of the support groove 37.
In the state where it is fixed in combination with the inclined surface 35 of the lower edge portion,
Is pressed by the inclined surface 36 of the support groove 37 and is biased toward the partition wall 16, so that the lower edge of the IC board 10 is
7 and the IC board 10 is mounted on the cartridge case 1
There is no risk of rattling in the thickness direction inside. Therefore, it is possible to provide a good magnetic tape cartridge that does not cause recording failure such as wear powder adhering to the magnetic tape and dropping of a recording signal.

In the IC board 10 of the above-described embodiment, the projection 34 is provided at the tip of the flexible deformation portion 31. However, for example, as in the dummy board 40 shown in FIG. Is formed so that the height of the distal end portion 43 is higher than the position of the inner wall surface 3b of the upper half 3.
May be formed so that the upper edge gradually decreases toward the base side.

The flexible deformable portion pressed and urged by the inner wall surface 3b of the upper half 3 is the flexible deformable portion 3 of the above embodiment.
It is not limited to a cantilever like 1, 41,
Of course, various forms can be adopted. For example, IC
By forming a slit opening extending along the upper edge of the board, a doubly-supported flexible deformable portion is formed, and a substantially central portion of the flexible deformable portion is higher than the inner wall surface of the upper half. Alternatively, a projection may be provided on the surface.

Further, as shown in FIG. 6, the sectional shape of the lower edge portion of the IC board 10 may be changed such that the inclination directions of the inclined surfaces 35 and 36 are reversed from those in the above-described embodiment. 7
As shown in FIG. 3, the lower edge of the IC board 10 is formed into a mountain-shaped cross section by a pair of inclined surfaces 35a and 35b, and a support groove 37 formed at the bottom in the accommodation space 15 is formed by a pair of inclined surfaces
The same effects as in the above-described embodiment can be obtained even with a valley-shaped cross section due to 6a and 36b.

[0023]

As described above, according to the magnetic cartridge of the present invention, after the electronic component or the dummy component is assembled at the predetermined position of the lower half, the upper half is assembled and fixed to the lower half of the cartridge case. Then, since the flexible deformable portion is elastically deformed, the electronic component or the dummy component is elastically clamped and fixed to the cartridge case by the elastic force of the flexible deformable portion which is to be restored. In addition, the lower edge of the electronic component or the dummy component is formed in a wedge-shaped cross section having an inclined surface inclined in a plate thickness direction, and the lower edge portion is provided at a bottom portion in the accommodation space of the lower half. Is formed, so that the electronic component or the dummy component is simply mounted in the accommodation space of the lower half, and the lower edge of the electronic component or the dummy component is supported by the support groove. Since it is supported by the groove, it is possible to easily prevent rattling in the thickness direction. Therefore, rattling can be prevented by simply improving the structure of the electronic component to be housed or its dummy component, and an inexpensive and good magnetic tape cartridge that does not generate abnormal noise or wear powder can be provided. .

[Brief description of the drawings]

FIG. 1 is an enlarged exploded perspective view of a main part of a magnetic tape cartridge according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1, showing a state in which an IC board and an erroneous erasure prevention piece are assembled to a lower half;

FIG. 3 is an external perspective view showing the entire configuration of the magnetic tape cartridge.

FIG. 4 is an external perspective view of a dummy board according to the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a sectional view of a main part according to another embodiment.

FIG. 7 is a sectional view of a main part according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cartridge case 2 Lower half 3 Upper half 3a Inner wall surface 10 IC board (electronic part) 30 Dummy board 31 Flexible deformation part 35 Inclined surface 36 Inclined surface 37 Support groove M Magnetic tape cartridge

Claims (1)

[Claims] 1. A magnetic tape cartridge in which an electronic component or its dummy component for storing management information of recording contents of a magnetic tape or the like is assembled in a cartridge case composed of an upper half and a lower half. The upper edge of the electronic component or the dummy component fitted in the space is provided with a flexible deformation portion pressed and urged by the inner wall surface of the upper half, and the lower edge of the electronic component or the dummy component thereof The portion is formed in a wedge-shaped cross section having an inclined surface inclined in the plate thickness direction, and a support groove having a wedge-shaped cross section in which the lower edge is fitted is formed in a bottom portion in the accommodation space of the lower half. A magnetic tape cartridge characterized by the above-mentioned.