JPH0419650Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a tape cassette.

Conventional technology In the past, magnetic tape cassettes, especially for video, had two reels built in to wind the tape, and a brake was applied to prevent the wound tape from loosening when not in use. is common.

Conventionally, this type of tape cassette is shown in Figures 5 to 7.
The structure was as shown in the figure. In the figure, a lower cassette 1 houses a pair of reels 2, 2, and the tape 3 wound on one reel 2 passes through the opening 1a of the lower cassette 1 and is wound on the other reel 2. The outer peripheries of the flange portions 2a, 2a of the reels 2, 2 are provided with toothed portions 2b, 2b over the entire circumference, which engage with the brake levers 4, 5 to prevent rotation. The brake levers 4, 5 are connected to the toothed portions 2b of the reels 2, 2 at their respective ends by a spring 6 attached to the lower cassette 1.
It is biased to mesh with 2b. When the tape cassette is attached to the deck, the pin 7 on the deck side rotates the release lever 8, and the back 8a of the release lever 8 rotates the brake lever 4,
The brake levers 4 and 5 are rotated inwardly by pressing the ends 4a and 5a of the reels 2 and 5 to release the engagement between the tips and the toothed parts 2b and 2b of the reels 2 and 2. It is configured so that it can rotate freely. The spring 6 is provided between the ribs 1b and 1c integrally provided on the lower cassette 1. Also, the spring 6 is connected to the brake levers 4 and 5.
is in contact with the vertical surface on the back of the

Problems to be Solved by the Invention In this conventional configuration, the brake mechanism is composed of a total of four members: the brake levers 4 and 5, the spring 6, and the release lever 8.
Furthermore, since each member has a relatively complicated shape as shown in the drawings, there is a problem in that it is difficult to automatically assemble the cassette at high speed.

This invention solves these problems,
The purpose is to enable automatic assembly of cassettes at high speed.

Means for Solving the Problem In order to solve this problem, the present invention provides a reel 12 for winding a tape provided with a toothed portion 12b on the outer periphery, and a toothed portion 12b of this reel 12 that engages with the reel 12 for winding the tape. Brake levers 13 and 14 that work together to prevent rotation of the reel 12, and the brake levers 13 and 1
The release lever 19 presses and rotates the brake lever 19 to release the engagement with the toothed portion 12b, and the spring 15 biases the brake levers 13 and 14 in the direction of engaging the brake lever 13 and the toothed portion 12b. The brake levers 13, 14 are rotatably supported by pins 16c, 16d integrally provided on the substrate 16, and the spring 15 is held between ribs 16e, 16f integrally provided on the substrate 16, Further, the release lever 19 has a hinge portion 19a.
By being engaged with the substrate 16 via
The brake levers 13, 14, spring 15 and release lever 19 are installed on one board to form one unit, and this unit is attached to the lower cassette 11.
Positioning pins 11a, 1 provided integrally with
1b, and is supported and fixed.

Effect: With this configuration, by preparing the brake section made up of multiple members as a single unit, it is only necessary to attach the single unit to the lower cassette, so the assembly equipment main body can be made smaller.
High-speed assembly becomes possible.

Embodiment Hereinafter, the drawings (first
This will be explained based on FIGS.

In the figure, 11 is a lower cassette, and a pair of reels 12, 12 are provided thereon. Toothed portions 12b, 12b are provided on the outer periphery of the flange portions 12a, 12a of these reels 12, 12. 1
3 and 14 are a pair of brake levers, which are urged by a spring 15 in the direction of meshing with the toothed portions 12b and 12b. A release lever 19 is integrally connected to the base plate 16 through a hinge 19a, and the brake levers 13, 14 are connected to pins 16c, 16d set on the base plate 16.
is rotatably supported, and the center of the spring 15 is held between ribs 16e and 16f formed integrally with the release lever 19. Reference numeral 11a designates an auxiliary positioning pin protruding from the upper surface of the lower cassette 11, which is fitted into a hole 16g formed in the base plate 16 of the release lever 19. 16h is a hole for adjusting the bending strength of the hinge portion 19a of the release lever 19. 16i is each pin 16
The pins 11b integrally provided on the lower cassette 11 are fitted into the recesses formed on the lower surface of the base plate 16 at positions c and 16d to determine their mutual positions, and also to release the brakes applied to the brake levers 13 and 14. The force is received through the substrate portion 16. Further, a boss 17a provided on the upper cassette 17 is fitted into the top of each of the pins 16c and 16d.

Here, the release lever 19 is connected to the hinge portion 1
9a, it is necessary to select a resin that is compatible with hinge properties, mechanical strength, and dimensional stability, such as polypropylene resin or AS resin for hinges. This release lever 19 is connected to the brake levers 13 and 14.
FIG. 4 shows the state in which the spring 15 and the spring 15 are attached.
These four members are assembled into a unit in the form shown in the figure, and then attached to the lower cassette 11 using assembly equipment.

When the tape cassette having the above structure is mounted on the deck, the pin 18 on the deck side enters the lower cassette 11 in the direction of the arrow in FIG. presses the ends 13a, 14a of the brake levers 13, 14, which causes the brake levers 13, 14 to rotate inwardly against each other overcoming the elasticity of the spring 15, and the toothed portions 12
b, 12b is released and the reels 12, 1
2 will be able to rotate.

When the tape cassette is taken out from the deck, the restoring force of the spring 15 causes the brake levers 13 and 14 to move.
engages with the toothed portions 12b, 12b and pushes the release lever 19 back.

Effects of the Invention As described above, according to the present invention, the brake mechanism made up of a plurality of members can be supplied to the assembly equipment as a single unit, so that the assembly equipment can be made smaller and faster.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is an enlarged plan view of the brake part of the tape cassette, FIG. 2 is a cross-sectional view taken along line XX in FIG.
The figures are also a Y-Y sectional view of Fig. 1, Fig. 4 is a plan view of the brake mechanism unit, Fig. 5 is a plan view showing the internal structure of a conventional tape cassette, and Fig. 6 is an enlarged view of the brake part. Figure 7 shows Z- in Figure 6.
It is a Z sectional view. 11...lower cassette, 11a, 11b, 16
c, 16d...pin, 12...reel, 12b...
...Toothed portion, 13, 14...Brake lever, 15
...Spring, 16e, 16f...Rib, 19a...
Hinge part, 16... Board part, 19... Release lever.

Claims (1)

[Scope of utility model registration request] A reel 12 for winding a tape provided with a toothed portion 12b on the outer periphery, and a toothed portion 1 of this reel 12.
2b to prevent the rotation of the reel 12; a release lever 19 that presses and rotates the brake levers 13, 14 to release the engagement with the toothed portion 12b; and the brake lever 19. The brake levers 13 and 14 are rotatably supported by pins 16c and 16d integrally provided on the base plate 16. In addition, the spring 15 is held between ribs 16e and 16f integrally provided on the base plate 16, and the release lever 19 is engaged with the base plate 16 via its hinge portion 19a, so that the brake Levers 13, 14, spring 1
5 and the release lever 19 are installed on one board to form one unit, and this unit is connected to the positioning pin 1 integrally provided in the lower cassette 11.
A tape cassette configured to be inserted into 1a and 11b and supported and fixed.