KR880001934Y1 - Tape cassette - Google Patents

Abstract

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Description

Tape cassette

1 (a), 1 (b) and 1 (c) are partial cutaway plan views, wjd views, and right side views, respectively, of one embodiment of the tape cassette of the present invention.

2 is a longitudinal side view of the tape cassette taken along the line II-II in FIG. 1;

3 is a view showing the upper and lower half of the tape cassette housing separately.

4 is a cross-sectional view showing the opening and closing circumferential structure in the open state of the opening and closing cover.

3 and 5 are enlarged side views showing the closed state and the open state of the lid (outer lid), respectively, in association with the lock mechanism and the like.

7 is a cross-sectional view taken along the line VII-VII of FIG. 5 showing a state in which the lock lever is assembled to the cassette housing.

8 (a) and 8 (b) are plan and front views of the transparent plate for the transparent window, respectively.

9 is a state of the opening and closing cover when the tape cassette assembly and the matching method of the opening and closing cover and the cam groove,

10, 11 and 12 show stepwise matching methods of the lock lever and the lower end when assembling the tape cassette, respectively.

* Explanation of symbols for main parts of the drawings

1: tape cassette 2: cassette housing

2A: front 3: opening and closing cover

4: upper half 5: lower half

5d: outer side wall 5d-1: side cross section

5d-2: Extruded curved surface 5d-3: Top part

5d-4: Lower side 6: Supply reel

7: winding reel 9: reel brake device

12: magnetic tape 12A; Tape path

20: outer cover 21: inner cover

30: lock device 31: lock lever

32: matching arm for locking 33: unlocking arm

33a: projection 34: thin long arm

35,36: first and second space 37: pin

The present invention is made by matching the upper and lower halves, and relates to a tape cassette of a type formed as a housing for housing the tape therein and a cover covering the front side thereof.

In general, the VTR tape cassette is configured as a tape accommodating housing and a tape protective cover covering the front shaft on the housing by matching the upper half and the lower half of the housing accommodating the upper half and the lower half. Such a tape cassette is assembled by polymerizing the upper half on the lower half and fixing both with screws.

Means for temporarily stopping both halves were not provided in the state where the upper half was polymerized on the lower half, and the tape cassette was assembled by being fixed with screws while the upper half was merely polymerized. For this reason, the upper and lower halves were matched, but the two parts were separated before the fixing, so that there was a need to perform the matching again, or the screwing work had to be handled carefully so that the assembly of the tape cassette could not be efficiently performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cassette which solves the above problems, the means of which is achieved by bringing the upper half and the lower half into close proximity to each other to accommodate the tape therein, and to be attached to the housing and to close the lid. A tape cassette having an opening / closing cover covering the front side of the housing, wherein a cover locking member for locking the opening / closing cover in a closed state is installed on the side wall of the upper half, and the lower half when the upper half and the lower half are aligned to a part thereof. The temporary fixing part is provided so that the upper part and the lower part do not fall in cooperation with the matched part.

It will be described below with reference to the drawings.

1 (a), 1 (b), 1 (c) and 2 are respectively shown one embodiment of the tape cassette of the present invention. In each figure, the tape cassette 1 is roughly comprised as the cassette housing 2 and the open cover 3 of the front surface 2A side.

As shown in parallel with FIG. 3, the cassette housing 2 is formed by matching the upper half 4 and the lower half 5 (manufactured by ABS resin), and the supply reel 6 and the winding reel 7 therein. ) Is housed in a crimped state on the lower half 5 side by a V-shaped reel crimping spring 8 fixed to the upper half 4. Reference numeral 9 denotes a reel brake device, which is provided near the rear surface 2B of the inside of the housing 2. A central portion on the front side of the lower half portion 5 is provided with a loading pole hydraulic pressure cutting portion 5a. The side is provided with side walls 5b and 5c relatively advancing forward, and partition walls having a height of 1/2 the height of the cassette are provided along their outer edges. In particular, the partitions facing the left and right sides of the cutout opening 5a are formed of tape cassette partition walls 10 and 11 which protrude to a position at a height in contact with the upper lid 4a of the upper half 4, unlike other portions. It is. S-shaped cover opening and closing Kim grooves 10 and 11a are formed in the partitions 10 and 11, and semi-circular tape guide portions 10b and 11b are formed on the opposite side.

The magnetic tape 12 is withdrawn from the supply reel 6 and guided to the tape guide portion 11b through the half side wall 5b, and is suppressed in the other side wall 5b across the front surface of the cutout 5a. Here, the tape running path 12A is guided to the tape guide portion 10b and reaches the winding reel 7 through the half side wall 5. The tape guides 10b and 11b guide the tapes at the entrances and exits of the cassette housing 2 even when the magnetic tape 12 is pulled out of the tape cassette, where the tape guides 10b and 11b are upper and lower half portions. Since the whole is formed in the partitions 10 and 11 rather than matching the tape guide part formed in the partition of each, surface curvature does not appear in the middle of a guide part. Thus, the magnetic tape 12 is guided well without fear of damage. The opening and closing lid 3 has a structure in which the outer lid 20 and the inner lid 21 are defined, and are attached to the front surface 2A side of the cassette housing 2, and the lid is opened as shown in FIG. In the closed state, the outer lid 20 and the inner lid 21 cooperate to protect the magnetic tape 12.

The outer lid 20 is composed of the front wall 20a, the left and right side walls 20b and 20c, and the outer lid member arms 20d and 20e for supporting the inner lid, which extends to a part of the upper surface of the cassette housing 2. The outer cover member arms 20d and 20e protrude from the front wall 20a so as to face the surfaces of the partitions 10 and 11 and the cutouts 5a in close proximity. The outer cover 20 is partitioned and upper half of the lower half 5 along the substantially central axes 20b-1, 20c-1 of the sidewalls 20b, 20c, as shown enlarged in FIGS. 5 and 6. The partition of (4) is clamped in the bearing part which cooperates, and is rotatably supported by the center position in the height direction of the tape cassette 1.

The inner cover 21 has a dimension that is slightly smaller than the dimension between the approximately elongated upper plate 21a and the outer cover member arms 20d and 20e in an inclined shape from the upper plate 21a toward the lower front direction. In view, it has a projection 21c (the other side not shown), which is a shaft that protrudes laterally in the center, and an arm portion 21d (the other side not shown) on the lower side. The inner lid 21 has a projection 21c coupled to a hole at the lower end side of the outer lid member arms 20d and 20e, and a shaft portion 21e which is a cam follower at the tip side of the arm 21d (the other side). Is not shown) is configured to be coupled to the cam groove (10a) to be movable. That is, the inner cover 21 is coupled to the shaft groove 21e in the corresponding cam grooves 10a and 11a, and the outer cover 21 is supported such that the left and right end walls of the inner wall 21b are rotatable. The rotation of the outer cover 20 is controlled by the cam grooves 10a and 11a.

In the closed state, as shown in FIG. 2, the outer cover 20 rotates counterclockwise, and the inner cover 21 guides the side portion 21e at the lower position P ₁ of the cam groove 10a and clockwise. Rotate to The lower edge of the inner wall 21b is in contact with the lower edge of the front wall 21a of the outer cover 21. Accordingly, the magnetic tape 12 crossing the front of the cutout portion 5a is covered by the front wall 21a of the outer cover 21 with the surface and the upper edge thereof, and the inner side surface and the lower edge portion of the tape cover the inner side ( It is covered by the inner wall 21b of 21 and completely protected. In addition, the elongated upper plate 21a of the inner lid 21 is flush with the upper lid 4a of the upper half 4 to cover the entire surface of the cassette housing 2. In addition, the opening and closing lid 3 is locked in the lid closing position by the coil spring 22 as shown in FIG. 5, the coil spring 22 is coupled to the shaft 20c-1, and has one end. Is fixed to the side protrusion 23 of the upper half 4, and the other end is fixed to the protrusion 20c-2 on the side wall 20c.

The opening / closing cover 3 releases the lock mechanism as described in FIG. 6 by an operation in which the tape cassette 1 is mounted in the apparatus and reaches the operating position by the pick-up mechanism (to be described later). The pin 24 is in contact with the outer cover 20 to the spring 22 to rotate about 90 degrees clockwise to open the cover. The inner cover 21 is guided by the Kim grooves 10a and 11a corresponding to the left and right shaft portions 21e, and rotates counterclockwise with respect to the outer cover 20, so that the magnetic tape on the bottom surface of the inner wall 21b is rotated. The cam grooves 10a and 11a move in the clockwise direction about the shafts 20b-1 and 20c-1 in such a manner as to avoid (12), that is, the lower edges of the inner wall 21b during the lid opening operation. The cam grooves 10a and 11a are configured to be connected to partial cam grooves formed in the vertical walls of the upper and lower halves so that the tape does not damage the tape. Instead of being formed on one of the partitions 10 and 11 as a whole, the connection discontinuity is never formed on the way and the cam accuracy is improved. For this reason, the axial part 21e moves flexibly in the corresponding cam groove 10a, 11a at the time of opening / closing cover operation, and the inner cover 21 rotates stably. In particular, since the shaft portion 21e does not rattle in the cam groove 10a even after the lid 3 is opened and closed several times, high reliability of the lid 3 and the related device can be obtained.

In addition, in the state in which the cover is open, the inner cover 21 is restricted in position by the shaft portion 21e coupled to the protrusion 21c and the upper position P ₂ of the cam groove 10a, which is shown in FIG. Will be in a state. The elongated upper plate 21a is kept in a state where the upper cover 4a of the upper half 4 is not spaced apart from each other but somewhat spaced apart from each other to give a large number of spaces to the structure of the opening and closing cover 3, that is, Even if the dimensions of the respective portions are inconsistent, the inner lid 21 is prevented from being strongly pressed by both sides by the upper half upper lid and the plate cam groove.

In addition, the opening and closing cover 3 is rotated counterclockwise by the spring 22 when the force in the direction in which the cover is opened by the pin 24 is rotated automatically, as shown in FIG. 2 and FIG. The cover is closed. In the state where the cover is closed, as shown in FIG. 1 (b), the outer wall 20 has the cutout portions 20a-1 and 20a-2 on the left and right sides of the lower edge of the front wall 20a. Is coupled to the tip protrusions 5b-1 and 5c-2 of the side walls 5b and 5c of the side wall, and the inner cover 21 has an upper plate 21a between the left and right side walls 20b and 20c of the outer cover 20. In this figure, the displacement in the left and right directions is restricted. The opening / closing cover 3 is locked in the closed position by the locking device 30 provided on the right side wall of the cassette housing 2. The lock device 30 is usually configured as a lock lever 31. The lock lever 31 has a lock arm 32, a lock release arm 33, and an elongated arm (as shown in FIGS. 1A, 1B, and 5-7). 34 is an integrally formed resin molded article and is formed between the space 35 between the outer side wall 4b and the inner side wall 4c of the upper half 4 and the outer side wall 5d and the inner side wall 5e of the lower half 5. It is accommodated in the space 36 (continuous with the said space 35), and is rotatably provided centering around the pin 37 formed in the upper half part 4. As shown in FIG. As shown in FIG. 5, the opening / closing cover 3 locks the nearly grooved base matching protrusion 20c-3 that protrudes inside the side wall 20c of the outer cover 20. It is comprised so that it may lock to the hook part 32a of the cover, and it will lock in the closed position.

The elongated arm 34 may be configured to be elastically bent to function as a spring. The elongate arm 34 protrudes upward from the middle portion of the lock arm 32 in FIG. 5, bends counterclockwise, and then extends to the left axis. Will be in the same position as. In addition, the elongated arm 34 is supported by the projection 25 of the upper side wall in a state in which the tip side is bent in the direction away from the lock arm 32, and the lock lever 31 is an elongated arm. It is in the pressurized state so that it may rotate clockwise by the elastic force of 34, and the hook part 32a is actively matched with the matching protrusion 20c-3. Further, the elongated arm 34 is used to restrict the rotational position of the lock lever 31 at the time of assembling the cassette as described later.

Moreover, the protrusion 33a which protrudes in the lateral direction is provided in the lowest part of the unlocking arm 33, and this protrusion 33a is in the lower space 38 of the outer side wall 5d of the lower half part 5. As shown in FIG. The projection 33a is effectively used for assembling the cassette as described later.

In addition, the above-mentioned lock remainder 30 is released by the lock release lever on the mounting side when the cassette is mounted. That is, the lock release lever 40, which is relatively inserted through the lock release lever suppressor 39 (see also the first (b)) while inserting the tape cassette 1 horizontally to the final position, is provided with the lock lever 31. The pressure of the lower portion of the unlocking arm 33 is relatively. As a result, the lock lever 31 is rotated counterclockwise due to the bending elastic force of the elongated arm 34 as shown in FIG. 6, and the hook portion 32a is pulled out of the mating protrusion 20c-3. The lock is released. The lock device 30 is also unlocked as in the above case by the lock release lever 41 inserted from the downward direction.

Next, the optical cape-head detection means will be described with reference to the first (first (a), first (c), and the like.

The cassette housing 2 is provided with a cylindrical lamp housing 50 for accommodating the tape end detection lamp at a position facing the cutout portion 5a at the upper and middle directions in the left and right directions. In addition, rectangular side openings 20c-5 (others are not shown) are provided in each of the side walls 20b and 20c of the outer lid 20. As shown in FIG. 6, the opening 20c-5 is in an open state in accordance with the sidewall opening 51 of the cassette housing 2 in the state where the lid 3 is opened. Moreover, the side wall 20b.20c functions as the shutter of the opening 51, and when the cover 3 is closed, it closes the opening 51 as shown in FIG.

The tape cassette 1 is mounted in a state where the lid 3 is liberated at a position where the left and right openings 51 (the other side is not shown) face the light receiving elements 52 and 53 of the apparatus. Accordingly, the light from the data end detection lamp 54 stored in the lamp housing 50 forms an optical path L ₁ toward the light receiving element 53 through the opening 51 and the opening 20c-5 inward. Similarly, the other side also forms an optical path L ₂ directed to the light receiving element 52 through the opening. Both ends of the magnetic tape serve as a transparent leader and a trailer tape. As a result, the tape end is optically detected by the lamp 54 and the light receiving elements 52 and 53. In addition, the optical paths L ₁ and L ₂ pass between the upper and lower reel flanges of the supply reel and the take-up reel, respectively, and are formed to be biased toward the opening / closing cover 3 in the tape cassette 1.

Next, a window for visually checking the wound state of the tape (hereinafter, referred to as a transparent window for checking the tape wound state) will be described with reference to FIGS. 8 (a) and 8 (b).

The transparent window 60 for checking the tape wound state is almost rectangular and is located at the rear side of the upper side of the cassette housing 2. This transparent window 60 is shown in FIGS. 8 (a) and 8 (b). The transparent plate 61 shown on the inside is adhesively fixed to the inside of the elongate opening 4d of the upper half part 4. The transparent plate 61 has the step part 61a formed in the both ends, and the 8th is also shown. (a) A brake stopper rib having one cutout portion 61b formed on the upper cover 4a of the upper half portion 4 in the form in which cutout portions 61b and 61c are formed on the upper and lower sides of the upper and middle directions. 4e), where the cutouts 61b and 61c for positioning are provided on both sides as shown in the drawing, so that the transparent plate 61 is not limited in the left and right directions, i.e., in any of the left and right directions. It is attachable and is easy to assemble.

In the transparent window 60 is because it is arranged at a position on the back (2B) of the upper surface of the cassette housing 2, the position is away from the optical path L _1, L _2, and the opening (51), (20c-5 ) Will be in position. For this reason, even when light from the outside enters the cassette housing 2 through the transparent window 60 in the cassette mounting state, the entered light reaches the opening 51 through the outside of the table loop in the cassette. There is no malfunction, and the malfunction of detecting the tape end by mistake from the outside does not occur. Therefore, the arrangement of the transparent window 60 can be particularly effective when applied to a small tape cassette. Moreover, even when looking into the cassette from the transparent window 60, the reel crimping leaf spring 8 is not seen, and it is also preferable by design. Next, the structure in which the reel pressing plate spring 8 is attached to the upper half 4 will be described with reference to FIGS. 1A and 2D in particular.

The tape cassette of the standard type has a large cassette housing itself, and the leaf spring is fixed by heat welding with a plurality of holes coupled to a plurality of corresponding protrusions provided in the upper half. However, the small tape and the tape cassette 1 are assembled in the same manner by fixing the upper half 4 and raising the lower half 5 as it is.

Further, in the present embodiment, the lock lever is moved to a position which does not hinder access when the upper and lower halves are approached as described above, and is configured to automatically reach the temporary fixable position not accompanying the completion of registration of the upper and lower halves. However, the present invention is not limited thereto. For example, the lock lever may be operated by a fingertip or the like so as to reach the retracted position and the temporary fixable position during the matching operation of the upper and lower halves.

As described above, the tape cassette of the present invention has various features listed below.

(1) The upper and lower halves are temporarily fixed so that the upper and lower halves are not separated from each other while the upper half is aligned with the lower half, so that the upper and lower halves can be stably held in the mated state even between the main fastening by screws and screw fixing for the main fastening Work can be performed well. In other words, if the upper and lower halves are only matched, the work of this fixing also needs to be carried out carefully so that the upper and lower halves are not separated, but when the upper and lower halves are temporarily fixed, It does not require very careful and as a result, the work of this fixing work can be performed well.

(2) Since it is temporarily fixed by using the cover lock member, no special member for temporary fixing is required.

Claims (1)

A cassette case comprising an upper half portion 4 and a lower half portion 5 mated with each other, a tape housed in the cassette, and positioned in a tape path selected along the front surface of the cassette case when the tape cassette is not used, and the cassette Located on the front of the case, the tape cassette is closed when the tape cassette is not in use, and the tape is closed so that the tape cassette is opened so as not to interfere with the operation of pulling out the tape from the cassette case. A locking device including a tape opening / closing cover 3 and a lock lever 31 which is loaded into the tape opening / closing cover in a closed position when the tape cassette is not in use, and rotatably supported on one of the upper half and the lower half. In the tape cassette provided with (30), The upper half 4 is located close to each other and includes a pair of side wall portions 4b and 4c defining a space 35, and the lower half 5 is located close to each other and the space 36. And a pair of side wall portions 5e and 5d defining a space, wherein the spaces are passed through each other to form a ball when the upper half and the lower half are coupled to each other, and the lock lever 31 is positioned at both ends of the side wall portion. The lock lever 31 made of the synthetic material is rotatable in the spaces 35 and 36, and in the closed position toward the opening direction of the tape opening and closing cover. The hook portion 2a for mating with the mating protrusion 20c-3 of the tape opening and closing cover 3 for limiting the rotation, and the unlocking member 40 of the recording and reproducing apparatus are provided with the tape cassette 1 for recording and reproducing. Of the tape opening and closing cover A lock releasing arm 33 for operating the lock lever to release the registration between the mating protrusion 20c-3 and the hook portion 3a of the lock tee, and the side wall 4b of the upper half portion 4; It consists of an elongated pressure 34 to match the projections (23, 25) of, the elongate arm 34 has an elastic deformation force, when the tape opening and closing cover (3) is closed Tighten the hook portion 32a of the locking device 30 in a direction to be engaged with the mating protrusion 20c-3, and when the upper half portion 4 is mated with the lower half portion 5, the upper half portion 5 Tape cassette, characterized in that to limit the rotational position of the lock lever (31) relative to.