JP3009839B2 - Tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a VHS-C tape cassette having brakes having different shapes on a tape supply reel and a take-up reel.

[0002]

2. Description of the Related Art As a conventional reel brake mechanism for a VHS-C type tape cassette, supply and take-up reels A and B are provided on an upper half C as shown in FIGS. The reel F is constantly pressed to the lower harp E side and its rotation is controlled by other brakes F and G having different shapes, and the brake F is rotatable about a tapping shaft H for fixing the upper and lower halves. It was attached to and was biased by a spring. (JP-A-5-33
No. 370)

[0003]

However, a coil spring J is fitted on the support shaft I of the winding-side brake G as in the prior art.
Locking the end arm portion J ₁ of the coil spring J to the winding side brake G, and the other end arm portions J ₂ is a spring receiving piece K engages the inner wall of the positioning groove E ₁ formed in the lower case E The coil spring J on the winding side as shown in FIGS.
Because supports the other end arm portion J ₂ in the lower half near the bottom narrow range, or assembly machine hits like the half sidewall E or the winding side brake G when mounting the coil spring J, with a half by mistake assembly and has the disadvantage that deviates from the abutment ribs, the spring other end arm portion J ₂ is once disengaged, only the tape damage is the other end arm portion J ₃ positions apart crowded around the region of the take-up reel On the other hand, there was a problem in that the interlocking operation and the braking function were lost and the tape could not be mounted on the deck when the tape was loose and the tape was severe. The present invention is intended to eliminate these conventional disadvantages, and aims to stabilize the braking operation of a brake mechanism that controls the rotation of a supply-side reel and a take-up reel. A tape cassette that ensures that the spring does not come off, ensures that the spring comes off, and ensures operation stability even if it comes off, can be used with peace of mind, has a simple assembly structure, and greatly improves assemblability and productivity. It is intended to provide.

[0004]

According to the present invention, a pair of reels, a supply reel and a take-up reel, each having a tape wound in a case composed of upper and lower halves, are rotatably provided. A cassette which is constantly pressed to the lower half side by a reel spring provided on the lower half and whose rotation is controlled by a separate brake, wherein the brake is rotatable about a support shaft protruding from the lower half. And a brake release pin inserted from the lower half brake release pin insertion hole to rotate the take-up brake and release the supply brake in conjunction with the take-up brake release. In the tape cassette, the one end of the coil spring fitted on the take-up brake or its support shaft is locked to the take-up brake, and the rib for locking the other end is fitted to the lower half. While projecting to the surface, it is those provided in the upper half of the spring escape prevention ribs in contact with the other end arm portion. Also, a coil spring fitted on the winding-side brake or its support shaft is fitted and held at a position higher than the upper end of the outer wall of the lower half.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the tape cassette of the present invention, when loaded on a deck, a brake release pin enters a brake release pin insertion hole, and a take-up reel brake rotates around a support shaft against a spring. To release the claw from the gear of the take-up reel, and the leading end of the take-up reel brake interlocks the supply-side reel brake to rotate about the support shaft against the spring, thereby turning the supply-side reel gear. Then, the claws of the supply-side reel brakes are removed, and the brakes of both reels are released, so that both reels can rotate. When the cassette is removed from the deck, the release pin is removed from the cassette, the reel brake is returned by the bias of the spring, the claw of the reel brake is engaged with the reel gear, the rotation is regulated, and the tape is wound. It is used without loosening. The other end of the coil spring of the take-up brake is locked by a rib protruding from the rear surface of the lower half, and is pressed from above by the spring-preventing rib of the upper half, so that a drop impact is applied. The end of the spring is securely and securely held without coming off, and the coil spring of the take-up brake is fitted and held at a position higher than the upper end of the half outer wall to improve the assemblability of the spring. Along with this, by extending the tip of the other end of the coil spring of the winding-side brake to the upper part of the sensor part of the half, a large space can be secured using the space of the upper half, and further improvement in assemblability can be achieved. Half-spring prevention ribs prevent the spring from coming off due to impact and make the length of the other end of the coil spring longer than the distance from the spring support to the side wall. In stop against the side wall spring tip even event occurs error due upon impact and assembly, the spring tip is to be further enhanced safety to prevent occurrence of malfunction or Tepukizu not enter up reel area.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, a pair of reels 6, 7 are provided in upper and lower halves 1, 2. FIG. 2 shows a cassette which is constantly pressed toward the lower half 2 by a reel spring 25 provided on the upper half 1, and the rotation of the reels 6, 7 is controlled by brakes 14, 15 having different shapes. As shown in FIG. 4 to FIG. 4, a cassette having a structure in which the supply side brake 14 is released in conjunction with the release of the winding side brake 15, and one end arm portion 17 a of a coil spring 17 fitted to the winding side brake 15. A locking rib 26 is provided on the back surface of the lower half 2 to lock the arm 17b with the winding side brake 15 and the other end arm 17b. 27 in the upper half 1 It is so not spring out of.

In this case, the spring 17 of the take-up side brake 15 is preferably provided with both arm portions 17a and 17b locked to the rear side of the case, respectively. The locking rib 26 is extended to a position where it comes into contact with the locking rib 26, and a spring removal preventing rib 27 provided opposite to the locking rib 26 is provided close to and above the other end arm portion 17b to help prevent deformation of the spring. is there. Moreover, the take-up side brake spring 17 is fitted and held at a position higher than the upper end of the outer wall of the lower half 2 to improve the assemblability of the spring.
That is, as shown in FIG.
Is a sensor for fitting and holding at a position higher than the height of the outer wall upper end (upper and lower half joining surfaces) of the lower half 2 to facilitate assembly, and to attach the tip of one end arm 17a of the spring to the lower half 2 for tape identification. able to extend to a part 2 ₂ of the upper, further facilitates the assembly (Figure 5). Since the upper portion of the sensor unit 2 ₂ there is an empty space, it is convenient to be assembled in a wide space at the time of the spring built. Further, the stopper rib 26 supported on the lower half 2 and the intersecting rib 27 of the upper half 1 intersect with the stopper rib 26 of the upper half 1, so that the detachment preventing rib assembling portion can be widened to prevent a collision occurring when the upper and lower halves 1 and 2 are aligned. Thus, it is possible to improve the assemblability and the reliability and to prevent the take-up side spring 17 from coming off. Incidentally, from one arm portion 17a lengths can be longer than the distance from the support shaft 15 ₁ to the sidewall of, joined by impact due to rear half-assembled fall winding side brake spring 17 engaging rib 26 of the spring 17 side walls 2 ₁ of the lower half 2, even if the outside and can prevent the influence of the abutment engages the tape. (Fig. 5)

Further, the brake 14, 15 is fitted rotatably to the support shaft 14 _1, 15 ₁ of the lower half 2, respectively, the claw portion 14 _2, 15 ₂ are meshed with the reel 6 and 7, the spring The support shafts 14 and 17 are biased in one direction.
The upper ends of ₁ and 15 ₁ are fitted into the bosses 12 and 13 of the upper half 1 and are fitted into recesses (not shown) provided in the upper half as necessary to control the rotation of the reels 6 and 7. Has become. Further, the springs 16 and 17 are respectively connected to the brake 1
Although they are fitted to the shafts ₄ and 15, they can also be fitted to the spindles 14 ₁ and 15 ₁ of the brakes 14 and 15.

In the figure, 3 is a case window, 4 is a lid, 5 is a brake release pin insertion hole, 8 is a supply side reel flange,
9 is a take-up side reel flange, 10 is a supply side tape clamp, 11 is a take-up side tape clamp, 16 is a supply side reel brake spring, 17 is a take-up side reel brake spring, 20
Is a supply side tape pad, 21 is a winding side tape pad, 2
3 is a take-up side reel ring, and 24 is a center boss.

[0010]

According to the present invention, a pair of reels, a supply reel and a take-up reel, each of which has a tape wound in a case composed of upper and lower halves, are rotatably provided, and each reel is provided in the upper half. A cassette that is constantly pressed to the lower half side by a reel spring, and whose rotation is controlled by separate brakes, wherein the brake is rotatably provided on a spindle protruding from the lower half, In the tape cassette having a linked structure in which the take-up side brake is rotated by the brake release pin inserted from the brake release pin insertion hole of the lower half and the supply side brake is released in conjunction with the release of the take-up side brake. A rib for locking one arm of the coil spring fitted on the winding brake or its support shaft to the winding brake and projecting a rib for locking the other arm on the back surface of the lower half. In both cases, the upper half is provided with a spring detachment prevention rib that comes into contact with the other end arm portion, so that the coil spring of the winding side brake has the other end arm portion locked by the rib protruding from the rear surface of the lower half. Also, even if a drop impact is applied by being pressed from above by the spring release prevention rib of the upper half, the spring end is securely and securely held without coming off, and the other arm of the other end of the spring comes off. This also improves the safety without hitting the inside surface of the half and sneaking into the take-up reel area, and the brake operation by the brake mechanism that controls the rotation of the supply-side reel and take-up reel. Stabilization can be achieved. In addition, the take-up side brake spring is located at an upper position higher than the upper end of the lower half side wall, so it is easy to assemble, eliminates assembly errors in automatic assembly work, improves safety, improves assemblability and reliability, and improves productivity. Can be greatly enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a separated state of an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an assembled state of a lower half of the embodiment of FIG. 1;

FIG. 3 is an enlarged perspective view of the brake mechanism of the present invention in a separated state.

FIG. 4 is an enlarged vertical sectional view taken along line XX of FIG. 2;

FIG. 5 is an enlarged plan view of a main part of the winding-side brake according to the embodiment of FIG. 1;

FIG. 6 is an assembly plan view of a conventional example, where (a) is a lower half,
(B) shows the upper half.

FIG. 7 is an enlarged plan view of a main part of the take-up side brake in the example of FIG. 6;

[Explanation of symbols]

1 Upper half 2 Lower half 6 Supply reel 7 Take-up reel 12, 13 Boss 14 Supply brake 14 ₁ Support shaft 15 Take-up brake 15 ₁ Support shaft 16 Supply reel brake spring 17 Take-up reel brake spring 17a One end arm portion 17b Other end arm portion 25 Reel spring 26 Locking rib 27 Spring prevention rib

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 23/087 506

Claims (3)

(57) [Claims] 1. A pair of reels, a supply reel and a take-up reel, each of which has a tape wound in a case composed of upper and lower halves, are rotatably provided, and each reel is lowered by a reel spring provided in an upper half. A cassette which is constantly pressed to the half side and whose rotation is controlled by a separate brake, wherein the brake is rotatably provided on a support shaft projecting from the lower half, and In the tape cassette having a linked structure in which the take-up side brake is rotated by the brake release pin inserted from the brake release pin insertion hole and the supply side brake is released in conjunction with the release of the take-up side brake, One end of a brake or a coil spring fitted to a support shaft thereof is engaged with a take-up side brake, and a rib for engaging the other end is projected from a back surface of the lower half. A tape cassette comprising an upper half provided with a spring release prevention rib abutting on an end arm. 2. The tape cassette according to claim 1, wherein the springs of the take-up side brake are provided with the arms at both ends thereof locked toward the rear side of the case. 3. A pair of reels, a supply reel and a take-up reel, each of which has a tape wound in a case composed of upper and lower halves, are rotatably provided, and each reel is lowered by a reel spring provided in an upper half. A cassette which is constantly pressed to the half side and whose rotation is controlled by a separate brake, wherein the brake is rotatably provided on a support shaft projecting from the lower half, and In the tape cassette having a linked structure in which the take-up side brake is rotated by the brake release pin inserted from the brake release pin insertion hole and the supply side brake is released in conjunction with the release of the take-up side brake, A tape cassette, wherein a coil spring fitted to a brake or its support shaft is fitted and held at a position higher than an upper end of an outer wall of a lower half.