JPH04111069U - tape cassette - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a tape cassette with high efficiency in attaching a coil spring to a cassette case. [Configuration] 2 rotatably stored in the cassette case
a reel, a tape body wound around the reel, two stoppers that respectively restrict the rotation of the reels, a release member that releases the engagement between the stopper and the reel, and one end of the tape body that is engaged with the stopper. , the tape cassette has two coil springs, the other end of which is engaged with a rod-shaped abutting part protruding from the cassette case to bias the stopper in the reel direction; It is formed into an inclined surface that gradually slopes toward the other end of the coil spring.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tape cassette, and particularly has a mechanism for fixing the position of the reel. The present invention relates to tape cassettes.

0002

[Conventional technology]

The schematic structure of a conventional video tape cassette will be explained based on FIGS. 1 to 4. . This tape cassette consists of two tapes rotatably housed in a cassette case 10. The reels 20 and 30 and the windings that are wound around these reels 20 and 30 and as they rotate. A rotating tape body 40 and a tape body 40 rotatably mounted inside the cassette case 10. two synthetic resin stocks that respectively regulate the rotation of the reels 20 and 30. These stoppers 50 and 60 are rotated and these stoppers 50 and 60 are rotated. 0.60 and a release member 70 for releasing the engagement between the reels 20 and 30. It is configured.

0003 The two reels 20 and 30 have the same configuration, and have a cassette case. cylindrical cylinders rotatably installed in the 10 and spaced apart from each other in parallel Shafts 21 and 31, and disc-shaped disks fixed to both axial end faces of the shafts 21 and 31, respectively. and guide plates 22 and 32 of the same size (in Fig. 1, only the guide plate on one end side is shown). It consists of On the outer periphery of the guide plates 22 and 32 on the one end side, , a large number of rectangular engagement recesses 23 and 33 are formed at regular intervals and over the entire circumference. It is.

0004 The stoppers 50 and 60 are symmetrically arranged and have the same structure, and are It is rotatably attached to two cylindrical shafts 11 protruding from the inner peripheral surface of the case 10. The cylindrical rotation shafts 51 and 61 are fitted together, and the above-mentioned rotation shafts 51 and 61 are fitted together. The engagement recess 2 is integrally provided to protrude toward the guide plates 22 and 32 of the wheels 20 and 30. 3 and 33, and the engagement plates 52 and 62 that are engaged and disengaged from the rotation shafts 51 and 61. A release member 7 which is integrally extended in a direction inclined with respect to the plates 52 and 62 and which will be described later. It is composed of abutment plates 53 and 63 that abut against the pressure plate 73 of 0. Also, the above On the upper end side of the rotation shafts 51 and 61, there is a coil coil formed by winding a thin bar-shaped steel material. A winding portion 80a of the pull 80 is fitted and attached to the shaft body 11. . One end side of this coil spring 80 is provided to protrude from the upper end surface of the engagement plates 52 and 62. The coil sprocket contacts the protrusions 52a and 62a and is prevented from moving. The other end of the ring 80 is connected to the cassette case 1 in the vicinity of the rotation shafts 51 and 61. 0 and is prevented from moving by abutting against a rod-shaped abutting portion 12 protruding from the inside of the 0. As a result, one end of the coil spring 80 touches the stoppers 50 and 60. The other end is engaged with the contact portion 12. Also, this In this state, the coil spring 80 causes the engagement plates 52 and 62 to be engaged. A biasing force is applied in the direction of the mating recesses 23 and 33.

[0005] The release member 70 includes a support section (not shown) provided upright inside the cassette case 10. A rotating shaft 71 whose both ends are rotatably supported by A rotating plate 72 protruding in the horizontal direction (rightward in FIG. 4) and a rotating shaft 71 two presses protruding upward and arranged to abut against the abutment plates 53 and 63; It is composed of a plate 73.

[0006] Below the rotating plate 72 (FIG. 4), there is a hole extending through the thickness direction of the cassette case 10. A through hole 13 is bored. A tape cassette is inserted into the through hole 13. When inserted into the video deck, the push-up rod installed on the video deck A head 90 is inserted therethrough.

[0007] The operation of the conventional tape cassette having the above configuration will be explained. first, When the tape cassette is removed from the VCR, for example when being transported or stored, etc. In this case, the coil spring 80 directs the engagement plates 52 and 62 toward the engagement recesses 23 and 33. Since the engagement plates 52 and 62 are engaged in the engagement recesses 23 and 33, The engaging plates 52 and 62 prevent the reels 20 and 30 from rotating, and the tape body 40 can be prevented from loosening.

[0008] Next, when this tape cassette is inserted into the video deck, The push-up rod 90 of the Deodek passes through the through hole 13 and comes into contact with the rotating plate 72. Ru. Then, the rotating plate 72 rotates in the direction of arrow A in FIG. The plates 73 rotate in the same direction and abut against the contact plates 53 and 63, respectively. below Since the operation is the same for the stoppers 50 and 60, in order to simplify the explanation, The explanation will be given by taking the stopper 50 as an example. When the press plate 73 comes into contact with the contact plate 53, this happens. The contact plate 53 rotates in the direction of arrow B in FIG. 4, and the engagement plate 52 rotates in the same direction. Rotate. Then, the engagement plate 52 separates from the engagement recess 23, and the engagement between the two is released. It will be done. This allows the reels 20 and 30 to rotate freely, allowing playback and winding. Tape running such as returning can be performed as desired.

[0009] By the way, in the conventional tape cassette described above, the coil spring 80 is To attach the coil spring 80 to the case 10, attach one end of the coil spring 80 to the engagement plate 52. ・Insert the winding part 80a into the shaft body 11 while engaging with the protrusions 52a and 62a of 62. In this state, connect the other end of the coil spring 80 to the lower part of the contact portion 12 in FIG. Push it to the side to engage it.

0010

[Problem that the idea aims to solve]

This invention was made in view of the above circumstances, and it is a method for installing coil spring 80. The purpose is to provide a highly efficient tape cassette.

[0011]

[Means to solve the problem]

The tape cassette of this invention has the tip of the abutting part facing the other end of the coil spring. The structure is such that it is formed on an inclined surface that gradually slopes toward the direction of the winding.

0012

【Example】

An embodiment of the tape cassette of the present invention will be described based on FIG. In addition, the real truth In the explanation of the example, the configuration common to the conventional tape cassette described above will be explained. are given the same reference numerals and detailed explanation will be omitted.

[0013] In the tape cassette of this embodiment, there are two contact parts 12 (one in FIG. Only the contact portion 12 of the book is shown. ) is connected to the coil spring 80. The above-mentioned conventional technology is different from the above-mentioned conventional technology in that it is formed on an inclined surface that gradually slopes toward the other end 81 side. There is a difference between

[0014] According to the tape cassette of this embodiment, the other end 81 side of the coil spring 80 is In the work of engaging the contact portion 12, the other end 81 is positioned above the tip portion 12a. If so, by moving the other end 81 downward, the other end 81 can be aligned with the distal end 1. Since the coil spring 80 and the contact portion 12 are guided in contact with the upper surface of the coil spring 2a, can be engaged. Therefore, the other end 81 of the coil spring 80 is There is no need to move it to the lower side of 12 before pushing it in, and the amount of movement of the other end 81 is reduced. can be reduced.

[0015] For this reason, in automatic assembly lines for cassette cases, etc., the amount of movement described above is By reducing the number of cassette cases, it improves work efficiency during cassette case assembly. There is an advantage that manufacturing costs can be reduced.

[0016]

[Effect of the idea]

The tape cassette of this invention has the tip of the abutting part facing the other end of the coil spring. The structure is such that the coil spring is formed on an inclined surface that gradually slopes toward the other end of the coil spring. The amount of movement can be reduced, improving work efficiency when assembling the cassette case. Therefore, the cost for manufacturing the cassette case can be reduced.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional tape cassette.

FIG. 2 is an enlarged view of the main part of FIG. 1;

FIG. 3 is an enlarged view of the main part of FIG. 2, showing the operation of a stopper.

FIG. 4 is an enlarged perspective view of essential parts taken along line A-A in FIG. 1;

FIG. 5 is a diagram showing an embodiment of the tape cassette according to the present invention, and is an enlarged perspective view of a main part corresponding to FIG. 4;

[Explanation of symbols]

10 Cassette case 11 Shaft body 11a Tip of shaft body 20/30 reel 40 Tape body 50/60 stopper 70 Release member 80 coil spring

Claims (1)

[Scope of utility model registration request] 1. Two reels rotatably housed in a cassette case made of synthetic resin, a tape body wound around these reels, and a cylindrical tape body erected within the cassette case. two stoppers that are rotatably fitted to the shaft of the book to restrict rotation of the reel, and a release member that rotates these stoppers to release the engagement between the stoppers and the reel. and the two cylindrical shaft bodies, one end of which is engaged with the stopper, and the other end of which is engaged with a rod-shaped contact portion protruding from the cassette case. In the tape cassette including two coil springs that bias the stopper in the reel direction, the tip of the contact portion is formed into an inclined surface that gradually slopes toward the other end of the coil spring. A tape cassette featuring