JPS6336540Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tape cartridge characterized by a reel holding means installed within the main body case.

As a conventional reel holding means, there is one shown in FIG. This is the upper wall 1a of the main case 1
A reel pressing spring 2 is fixed to the inner surface of the reel, and this spring 2
The free end of the tape reel 3 presses against the center of the upper surface 4a of the hub 4, which is the center of rotation of the tape reel 3.
A protrusion 5 abutting the free end is provided such that its tip 5a projects upward from the upper surface 4a of the hub 4.

However, as video decks have become lighter and smaller in recent years, there has been a strong demand for tape cartridges to be made thinner and smaller. Since the thickness of the tape cartridge is determined by the height _H1 in the vertical direction, the height of the reel 3
It is desirable that _H1 be as small as possible within a range that does not hinder the winding of a tape of a predetermined width.

However, as described above, the upper surface 4 of the hub 4
If the tip 5a of the protrusion 5 protrudes from the protrusion 5a, the height of the reel 3 increases by the amount of protrusion, which becomes a problem in making the tape cartridge thinner and smaller.

This invention focuses on this fact, and by providing a protrusion that is pressed by a reel pressing spring in the center of one side of the tape reel so that its tip is sunk below one side of the reel, the tape cartridge can be made thinner. The present invention aims to provide a tape cartridge that can be made smaller.

The details will be explained below based on the video tape cartridge shown in the drawings.

In FIGS. 1 and 2, 1 is a main case formed by connecting upper and lower plastic cases 6 and 7 with screws, etc., and a tape 8 is wrapped around the left and right inside of the main case 1. The reels 3, 3 are positioned and rotatably mounted on the drive shaft insertion holes 9, 9 opened in the lower case 7, and tape guide members 10, 10 are arranged on the front left and right sides of the main body case 1, and these guides Member 10,1
It is assumed that the tape 8 is fed out from one tape reel 3 through the tape 8, passes through the front surface of the main body case, and is wound onto the other tape reel 3. A pocket 11 into which a tape loading pin on the video deck side can be inserted is recessed in the front surface of the main body case 1, and a front cover 12 which can be opened and closed on the front surface of the main body case 1 is pivotally supported. is always biased in the closed position. In such cases, when the tape cartridge is not in use, the front cover 12 is attached to the tape guide member 1.
The outer front surface of the tape 8 between 0 and 10 is covered and protected, and when the tape cartridge is loaded into the video deck, the front cover 12 opens upward and the tape 8 is inserted into the pocket 11 by the loading pin. The main body case 1 enters a standby state in which it can be pulled out to the front.

This invention is characterized by the reel holding means 13 in the tape cartridge having such a structure. The reel holding means 13 includes a recess 14 formed in the center of the upper surface 4a of the hub 4 of each tape reel 3, and a protrusion 5 projecting upward from the center of the bottom of the recess 14. Tip 5 of protrusion 5
a is set to a height that sinks below the upper surface 4a of the hub 4. A reel pressing spring 2 is interposed between the inner surface of the upper wall 1a of the main body case 1 and each tape reel 3. The reel presser spring 2 is a strip spring having a mountain shape in plan view, and its base 2a is fixed to the center of the rear end of the inner surface of the upper wall 1a of the main body case 1 by caulking means or the like. The free end portion 2c of the arm portion 2b extending from the front toward the center of each tape reel 3 is pressed into contact with the tip 5a of the protrusion 5 to press down and bias the tape reel 3. do. The free end 2c of the reel pressing spring 2 is curved in a downward convex shape so as to enter into the recess 14 from the upper surface 4a of the hub 4.

When the reel holding means 13 is configured in this way, the height _H2 of the tape reel 3 in the vertical direction is the same as that of the conventional tape reel 3 shown in FIG. than the height H ₁ ,
The thickness of the tape cartridge can be made thinner than the conventional one while maintaining the spring pressure setting of the conventional reel presser spring 2. can do.

In the illustrated example, the reel pressing spring 2 is formed into a mountain shape when viewed from above, but it may have a shape other than this, for example, it may have a straight line shape in the left and right direction passing through both centers of the tape reels 3, 3. It may be a single unit, or a set of two tape reels 3 arranged in a straight line in the front-rear direction so as to pass through the center of each tape reel 3 in the front-rear direction.

Further, instead of being fixed to the inner surface of the upper wall 1a of the main body case 1, the reel presser spring 2 may be fixed to the inner surface of other walls of the main body case 1, or it may be fixed to the inner surface of the other walls of the main body case 1. does not necessarily have to be fixed, and may be attached in other ways.

As explained above, this invention has a recess 14 formed in the center of one side 4a of the tape reel 3.
Since the protrusion 5 pressed by the reel pressing spring 2 is provided so that its tip 5a is sunk toward the inside of the reel from one side 4a of the reel, the tape cartridge can be made as thin as possible and miniaturized. have

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an example of a tape cartridge according to this invention, and FIG. 2 is a sectional view showing its reel holding means. FIG. 3 is a sectional view showing a reel holding means of a conventional tape cartridge. 1...Body case, 2...Reel press, 3
...tape reel, 4...hub, 5...button.

Claims (1)

[Scope of utility model registration request] A tape reel 3 is built into the main body case 1, and a reel pressing spring 2 provided inside the main body case 1 is pressed against the tip 5a of a protrusion 5 protruding from a recess 14 in the center of one side 4a of the tape reel 3. The tape cartridge is characterized in that the tip 5a of the protrusion 5 is sunk toward the inside of the tape reel 3 from one side 4a of the tape reel 3.