JPS6083282A - Cassette with lid body - Google Patents

Abstract

PURPOSE:To secure the opening and closure of the opening part in the front surface of a cassette with a sense of clicking by composing the cassette of a couple of rotary support shafts provided to flanks of a U-shaped lid body, a couple of engagement holes which are provided to the cassette body, engaged with the rotary support shafts, and tapered nearly in a triangular shape backward, and an energizing means which energizes the rotary support shafts to the rear of the cassette. CONSTITUTION:The engagement holes 7 for the rotary support shafts 5 of the cassette lid are tapered almost in the triangular shape backward to abutting parts of an upper and a lower cassette half body. A spring 9 hooked at one terminal to the cassette lid rotary support shaft 5 energizes the cassette 4 backward all the time. When the closed cassette lid is opened, the front lower edge of the lid 4 is only pressed up. The lid 4 is energized backward with the spring 9, so the lid 4 is elevated along the front surface of the cassette opening part and then rotates clockwise around the front edge upper part of the opening part as a fulcrum when elevated by more than almost a half to be stored in contact with the top surface of the cassette. When the lid is closed, the cassette lid 4 is moved forth along the upper cassette half 1 to enter the reverse motion, closing the opening part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to improvements in cassettes, and more particularly to cassettes such as tape cassettes.

Conventional structure and problems In recent years, magnetic recording using tape cassettes has tended to have higher performance and higher density, and it is necessary to prevent the tape from being exposed to the outside air or from being touched by fingers and leaving fingerprints. has appeared. Therefore, it has been considered to put a lid on the opening 11 on the front side of the cassette, and this has already been done in video cassettes 1- and the like. If such a device is to be applied to an audio cassette, it is desired to have a simpler structure and be able to implement it at a lower cost.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to provide a cassette with a lid opening τ1 that has an extremely simple structure and operates reliably.

Structure of the Invention The present invention comprises a cassette including a cassette body and a U-shaped lid for opening and closing an opening of the cassette body, and a pair of rotation supports for the lid provided on the sides of the U-shaped lid. a shaft, a pair of substantially triangular fitting holes provided in the cassette body that taper toward the rear into which the rotation support shaft fits, and urging means for urging the rotation support shaft toward the rear of the cassette. A cassette 1- consisting of
The close contact between the lid and the opening surface is made to be the same.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a side view showing a cassette in a closed state in an embodiment of the present invention, and FIG. 2 is a side view showing the cassette in an open state. In Figures 1 and 2, 1 is the upper half of the cassette;
2 is the lower half of the cassette, 3 is the opening 1'' part on the front of the cassette,
4 is the cassette l-lid, 5 is the pivot shaft for cassette 1 to lid 4, 6
is a protrusion for opening and closing the lid provided on the front side of the cassette lid, and ri is a fitting hole for the cassette lid rotation support shaft 5, which has a generally triangular shape that tapers toward the rear at the butting part of the upper half of the cassette and the lower half of the cassette. is formed. Reference numeral 8 denotes a spring plowing pin formed integrally with the upper cassette half 2, and 9 a spring whose one end is bent by 1" to the cassette lid rotation support shaft 5, which always urges the cassette lid 4 backward. ing.

FIG. 3 is a top view showing the inside of the cassette, showing where the reel-to-reel tape 10 or 11 is stored.

FIG. 4 shows an embodiment of the lid 4. In FIG. 4, 11 indicates a stepped portion provided at the root of the pivot shafts, and a indicates the dimension between the stepped portions 6 and 5.

The operations of the receptacles y1 to 174 of this embodiment, which are constructed as described above, will be explained. First, in order to open the lid of the cassette 1- which is in the closed state shown in FIG. 1, the front lower edge of the lid 4 can be pushed up in one direction. Since the lid 4 is biased backward by the spring 9, the lid 4 is aligned upward along the front surface of the cassette 1-opening 1-1, and when the lid 4 rises by more than 1", the front edge of the opening 2" Rotate clockwise using U7 as a fulcrum and store it so that it is in close contact with the two sides of the case. When closing, clean the cassette lid 4 in the state shown in Fig. 2 onto the cassette upper half 1.
When it is moved in the opposite direction, it moves in the opposite direction to the previous one and closes the opening, resulting in the state shown in Figure 1. Although the lid can be opened toward the lower blade, when used in actual equipment, the cassette can be used on both sides, and the lid 4 always opens upward.

Here, the relationship between the total thickness H of the front surface of the opening and the distance pL from the inner surface of the lid to the pivot shaft is ML=V2H, so that in the open state, the lid 4 is completely in close contact with the top or bottom surface of the cassette. It can be stabilized. Furthermore, the rightmost position of the fitting hole 7 is located at the center of the cassette thickness so that the pivot shaft is always at the center of the cassette 1-thickness, and allows for close contact with the opening surface of the lid 4 in the closed state. It is best to make sure that they are in close contact with each other with a slight gap.

In addition, as shown in Figure 4, for the lid 4, by making the dimensions 1 and 1 of the lid attachment part on the cassette body slightly smaller, the force that always warps toward the opening surface in the attached state can be reduced. The close contact between the folded lid 4 and the opening surface can be made more reliable.

FIG. 6 shows an embodiment in which the lid 4 is warped, and the rising angle θ of both sides is made smaller than 90', so that the lid 4 is opened slightly when it is installed. As a result, a force is generated in which M4 bends 8 toward the opening surface, thereby making the close contact between the lid 4 and the opening surface more reliable.

Effects of the Invention The present invention comprises a cassette 1 body and a U-shaped lid for opening and closing the opening of the cassette body, and a row of the lids provided on the side of the U-shaped lid. Driving shaft and cassette 1
Consisting of a pair of substantially triangular fitting holes provided in one main body that taper toward the rear into which the rotation support shaft fits, and a biasing means for urging the rotation support shaft toward the rear of the cassette. By doing so,
The opening on the front of the cassette can be opened and closed in a timely manner with a click feeling, and the rice in the open state can be stored tightly against the top surface of the cassette, which prevents dead bases and is effective for converting the device into a single unit. be. Furthermore, the closed lid can be tightly attached to the opening, effectively preventing the intrusion of sawdust. It is extremely easy to configure with only a small number of additional parts required, and during assembly, the lid can be attached and spring-loaded on the lower cassette half, and the upper cassette half can be fitted by stacking it against it. Since the holes can be formed, it is possible to realize a cassette with extremely high practical value, such as excellent assembly workability.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the closed state of the cassette in one embodiment of the present invention, FIG. 2 is a side view showing the open state, FIG. 3 is a top view showing the inside of the cassette, and FIG. FIG. 5 is a top view of the lid of the second embodiment. 1... Upper half of Sumo wrestler, 2... Lower half of cassette, 3... Opening, 4... Lid, 5... Lid times. Dynamic support shaft, 9...spring. Name of agent Toshio Nakao and 16 others
Figure 1 Figure 2 Figure 3 Figure name Figure 4

Claims (1)

[Claims] (1) - A cassette body with an opening on the side, a U-shaped lid that opens and closes the internuclear space, and a pair of pivot shafts for the lid provided on the sides of the U-shaped lid. a row of substantially triangular fitting holes tapering toward the rear, into which the pivot shaft is fitted, provided in the cassette body; and biasing means for biasing the pivot shaft toward the rear of the cassette body. In addition to forming a stepped portion at the base of both rotational support shafts, the interval between both stepped portions is also made slightly smaller than that of the cassette body side. Characteristic cassette with lid. (R) - Consists of a cassette body with an opening on the side and a U-shaped lid that opens and closes the opening. The rotation support shaft of the lid body, a pair of fitting holes tapered toward the rear into which the rotation support shaft provided in the cassette body fit, and the rotation support shaft provided at the rear of the cassette body. A cassette with a lid, characterized in that the left and right sides of the lid are formed to be slightly smaller than 900 mm.