JPH0422449Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a tape cassette used in video decks and the like.

[Prior Art] Generally, a tape cassette has a structure in which a pair of tape reels are loaded into a cassette case, and tape is wound around these tape reels.
The tape reel rotates to send out and wind up the tape, and a brake lever is provided within the cassette case to lock the rotation of the tape reel.

FIGS. 4 to 7 are views showing conventional tape cassettes of this type. FIG. 4 shows the overall structure of a tape cassette, and reference numeral 1 in the figure indicates the tape cassette. This tape cassette 1 is made up of a lower case 2 and an upper case 3 stacked on top of each other. A pair of tape reels 4, 4 are loaded in the lower case 2, as shown in FIG. The tape reels 4, 4 have transparent disc-shaped upper flanges 5,
5 and reel hubs 6,6. The reel hubs 6, 6 have disc-shaped lower flanges 7a, 7a.
and cylindrical winding parts 7b, 7b formed at the center of these lower flanges 7a, 7a. The outer peripheral edges of the lower flanges 7a, 7a of the reel hubs 6, 6 are formed with uneven locking portions 8, 8 for stopping the rotation of the tape reels 4, 4.

A control section 9 is provided between the pair of tape reels 4, 4 in the lower case 2 for locking the rotation of these reels 4, 4.

As shown in FIG.
Steel springs 12, 12 for urging the locking parts 8, 8 of a, 7a, and the brake lever 1
1 and 11.

The control part forming wall part 10 includes a part of the outer wall of the lower case 2 and a wall part 1 extending inward from the part of the outer wall and along the peripheral edge of the tape reels 4, 4.
4, 14, walls 15, 15 extending vertically inward from a part of the outer wall of the lower case 2 between these walls 14, 14, and walls 15, 15 extending vertically inward from a part of the outer wall of the lower case 2 between these walls 14, 14; A substantially doglegged wall portion 1 formed at the end of
It consists of 6. There are openings 17, 1 between the ends of the walls 14, 14 and the end of the wall 16.
7 is formed. Openings 17, 17 are provided between the ends of the walls 14, 14 and the end of the wall 16.
is formed. The brake levers 11, 11 are located in a portion surrounded by a part of the outer wall of the lower wall case 2, the wall portions 14, 14, and the wall portions 15, 15.
Cylindrical shaft bodies 18, 18 to which the is rotatably attached
and cylindrical hooking portions 19, 19 for hooking the steel springs 12, 12 are formed symmetrically in parallel.

The above two brake levers 11, 11 have a mutually symmetrical structure, and one of these brake levers 11, 11 will be explained as an example.
The brake lever 11 includes a cylindrical portion 20 that is pivotally supported by the shaft body 18, an engagement wall portion 21 that extends radially outward from a side wall of the cylindrical portion 20, and has a bent tip.
An operating wall portion 22 extends from the cylinder portion 20 perpendicularly to the engaging wall portion 21, and an operating piece 23 extends from the tip of the operating wall portion 22 in the same direction as the engaging wall portion 21.
It is made up of. At the tip of the engagement wall portion 21,
As shown in FIG. 7, a claw portion 24 that engages with the engaging portion 8 of the tape reel 4 is formed. This claw portion 24 projects downward from the lower end of the cylindrical portion 20. Further, a protrusion 25 for hooking the steel spring 12 is formed on the operation wall 22 and protrudes in the opposite direction to the claw 24, and the tip of the operation piece 23 has a cylindrical shape. Contact part 26
is formed.

The release lever 13 operates the brake levers 11, 11 by pushing the contact portions 26, 26 of the brake levers 11, 11 downward in the figure, and includes a part of the outer wall of the lower case 2,
It is provided in a portion surrounded by walls 15, 15 and wall 16.

The brake levers 11, 11 have cylindrical portions 2
0 and 20 are attached to the shaft bodies 18 and 18 formed in the control section forming wall part 10 by being rotatably fitted to the shaft bodies 18 and 18, and this cylindrical part 2
Above 0,20 is a steel spring 12,1
2 is wound and fixed around the shaft bodies 18, 18. Both ends of these steel springs 12, 12 are connected to the projections 2 of the brake levers 11, 11.
5 and 25, and hooking portions 19 and 19 in the control portion forming wall portion 10. In this state, the steel springs 12, 12 bias the brake levers 11, 11 in the direction of the arrow A, thereby causing the engaging wall portions 2 of the brake levers 11, 11 to
The claws 24, 24 of 1, 21 are the tape reels 4,
4, the tape reel 4,
4 rotation is locked.

To unlock the rotation of the tape reels 4, 4, move the release levers 13, 13 to arrow B.
This causes the brake lever 1 to move in the direction
1 and 11 in the direction of arrow C using the shafts 18 and 18 as fulcrums, and then remove the pawls 24 and 24 of the brake levers 11 and 11 from the locking parts 8 and 8 of the tape reels 4 and 4. The release lever 13 is moved by loading the tape cassette 1 into a tape reproducing device or the like.

[Problems to be solved by the invention] By the way, regarding the above tape cassette,
When assembling this, there were the following inconveniences. That is, in order to automatically supply brake levers 11 to an automatic assembly line for tape cassettes, when the brake levers 11 are aligned so that their respective cylindrical portions 20 are located on the same axis and face in the same direction, the first As shown in FIG. 8, the claw portion 24 of the engaging wall portion 21 of the upper brake lever 11 hits the side end of the engaging wall portion 21 of the lower brake lever 11, and the aligned brake levers 11 are in a tilted state. becomes. For this reason, the conventional brake lever 11 does not move smoothly within the automatic supply device and tends to get stuck. For this reason, in conventional tape cassettes, manufacturing troubles often occur due to inadequate supply of the brake lever 11.

This idea was made in view of the above circumstances,
To provide a tape cassette that does not cause manufacturing troubles due to insufficient supply of brake levers 11.

[Means for Solving the Problems] Therefore, in the tape cassette of this invention, a notch is provided at the side end opposite to the side end where the claw part is formed of the engagement wall of the brake lever, and The width of the engaging wall portion of the notch from the side end opposite to the cylindrical portion is equal to or greater than the width of the claw portion, and The above problem has been solved by making the depth from the end surface of the cylindrical portion equal to or greater than the distance between the tip of the claw portion and the end surface of the cylindrical portion on the side where the claw portion is formed.

[Embodiment] FIGS. 1 to 3 are diagrams showing an embodiment of this invention. In these figures, Figures 6 and 7
Elements that are the same as those shown in the figures are given the same reference numerals. It should be noted that explanations of parts having the same configuration as those in FIGS. 6 and 7 will be omitted.

The difference between the tape cassette shown in FIG. 1 and the tape cassette 1 shown in FIG. 6 is the structure of the brake lever; the brake lever 11 of the tape cassette 1 shown in FIG. ing. As shown in FIG.
It is formed at the end of the side opposite to the side where it is formed. Here, the size of the notch 27 is such that the width L from the side end 21a of the engaging wall portion 21 is equal to or greater than the width of the claw portion 24, and in this case, the above-mentioned L is l. It is about 1mm wider. Further, the depth D from the upper end surface 20a of the cylindrical portion 20 is equal to or greater than the distance d between the tip 24a of the claw portion 24 and the lower end surface 20b of the cylindrical portion 20, and in this case, the above-mentioned D is It has become the same as d.

The brake levers 11, 11 mentioned above are located within the cassette case and are assembled in the same manner as the brake lever 11 shown in FIG. 6, and operate in the same manner to lock the rotation of the tape reels 4, 4.

When assembling the tape cassette 1 having these brake levers 11, 11, the brake levers 11, 11... are sequentially moved so that the cylindrical parts 20 of each are located on the same axis as shown in FIG. They are lined up in an automatic machine facing the same direction and automatically fed to the assembly line.

In the tape cassette 1 having such a structure, since the notches 27 are formed in the brake levers 11, 11, when assembling the tape cassette 1, one of the front and rear brake levers 11, 11 aligned in an automatic machine can be cut out. By fitting the pawl 24 of one brake lever 11 into the notch 27 of the other brake lever 11, these brake levers 11, 11 are maintained in a normal alignment state without being tilted. The brake levers 11, 11, . In addition, in the above tape cassette 1, since the notches 27, 27 are formed in the brake levers 11, 11, the material used for these brake levers 11, 11 can be reduced, and therefore the cost of the above tape cassette 1 can be reduced. You can try to bring it down.

[Effects of the invention] As explained above, the tape cassette of this invention has a notch formed at the side end opposite to the side end where the claw part of the engagement wall of the brake lever is formed. Therefore, when assembling the tape cassette, the brake levers can be properly aligned without being tilted by the automatic machine, thereby preventing manufacturing troubles such as improper setting of the brake levers. Further, in the above-mentioned tape cassette, since the notch is formed in the brake lever, the material used for these brake levers can be reduced, and therefore the cost of the above-mentioned tape cassette can be reduced.

[Brief explanation of drawings]

1 to 3 are views showing one embodiment of this invention, in which FIG. 1 is a plan view showing the main parts of the tape cassette, FIG. 2 is a side view of the brake lever,
FIG. 3 is a diagram showing a state in which the brake levers are aligned, and FIGS. 4 to 7 are diagrams showing an example of a conventional tape cassette. FIG. 4 is a perspective view of this tape cassette, and FIG. is a plan view of the lower case of the same tape cassette, Fig. 6 is a plan view showing the main parts of the same tape cassette, Fig. 7 is a side view of the brake lever of the same tape cassette, and Fig. 8 is an arrangement of conventional brake levers. FIG. 9 is a side view showing a state in which the brake lever is in a closed state, and FIG. 9 is a plan view showing a brake lever according to an embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Tape cassette, 4... Tape reel, 11... Brake lever, 20... Cylinder part, 2
1... Engagement wall portion, 24... Claw portion, 27... Notch.

Claims (1)

[Claim for Utility Model Registration] A tape reel 4 for winding tape is loaded in a cassette case, and a brake lever 11 is provided to lock the rotation of the reel 4. a cylindrical portion 20 pivotally supported by a shaft body 18 provided in the
A plate-shaped engagement wall portion 21 provided on a side wall of the cylindrical portion 20, and the cylindrical portion 20 of the engagement wall portion 21
In the tape cassette, a claw portion 24 that engages with the tape reel is provided on one side of the end opposite to the cylindrical portion 20 so as to protrude beyond one end surface of the cylindrical portion 20. A notch is provided at the side end opposite to the side end where the claw part 24 is formed, and the width of the notch 27 from the side end of the engagement wall part 21 on the opposite side to the cylindrical part 20 is set to match the claw part 24. The width of the notch 27 is equal to or greater than the width of the cylindrical portion 24, and the depth of the notch 27 from the end surface of the cylindrical portion 20 on the opposite side to the side where the claw portion 24 is formed is set so that the tip of the claw portion 24 and the cylindrical portion 20 Claw part 2
4. A tape cassette characterized in that the distance is equal to or greater than the distance from the end face on the side where 4 is formed.