JPH11328915A - Reel spring mounting structure for tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reel spring mounting structure for a tape cassette advantageous for recycling components or reducing the amount of a trash by reducing the installation cost for calking the reel spring to a case part and easily separating the plastic parts and the metallic parts at the time of disposing the device as waste. SOLUTION: In the mounting structure of the reel spring 4 for the tape cassette consisting of a leaf spring material repulsively pressurizing a center axial part of the tape reel housed in the case to the axial direction, a center part of this leaf spring material is projected in the nearly trapezoidal state from the inner surface of the case 51, and both base end parts 4a, 4b of the leaf spring material are, when the trapezoidal center part is pressurized to the center axial part of the tape reel, held at the side of the case 51 so as capable of sliding and also attaching/detaching in the longitudinal direction of the leaf spring, then a guide member 8 is provided for preventing the deviation in the width direction by sliding in contact with this leaf spring along both side edge parts in the longitudinal direction of this leaf spring material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a tape cassette device used for AV (Audio-Visual) devices such as eo Tape Recorder), and more particularly to a tape cassette device having a reel spring that presses the center of a tape reel to stabilize its rotation.

[0002]

2. Description of the Related Art As a conventional cassette tape device, for example, there is one as shown in FIG. The figure is 8mmVT
FIG. 2 is an exploded perspective view of a tape cassette device for R. In this tape cassette device, an entire case portion is mainly formed by an upper shell 51 (upper case portion) and a lower shell 52 (lower case portion), and these are combined. Inside, a pair of tape reels 55, 55 are stored.

On the front side of the upper shell 51 and the lower shell 52, that is, on the side where the magnetic tape 58 running between the tape reels 55 and 55 runs (the lower right side in the figure), the magnetic tape 58 is placed from the outside and the inside. An A lid 61 and an M lid 60 are provided as protection members for sandwiching and protecting.

[0004] When the tape reels 55, 55 around which both ends of the magnetic tape 58 are respectively wound rotate in the VTR and the magnetic tape 58 runs, the tape reels 55, 55 move in their axial direction or vibrate. If this occurs, the position of the magnetic tape 58 with respect to the magnetic head (not shown) moves, and the recording or reproduction operation cannot be performed smoothly. For this reason, a pair of reel springs 64 composed of leaf springs is provided to stably rotate the tape reels 55 and 55 so that they do not move in their axial directions. Tape reel 5
The distal ends 64 a of a pair of reel springs 64 are in contact with and pressed against the respective central portions of the reels 5 and 55, and the base ends 64 b of the reel springs 64 are locked to the upper shell 51.

As the reel spring 64, a metal leaf spring such as a spring steel plate is used. The reel spring 64 using such a metal leaf spring has a small dimensional change with respect to the surrounding environment, has excellent wear resistance with respect to a reel rotating at a high speed, and has a small variation in friction coefficient. Has the advantage of

FIG. 31 is a view showing an assembled state of the tape cassette device of FIG. 30. FIG. 32 is a sectional view taken along line AA of the tape cassette device of FIG. FIG. 34 is a perspective view of the tape cassette device shown in FIG. 32, taken along line BB. As shown in FIG. 32, the leading end 64a of the reel spring 64 is in contact with the reel top (center portion) 55a of the tape reel 55, and the rear end 64b of the reel spring 64 is located in FIG.
As shown in the figure, the upper shell 51 is caulked and locked.

FIG. 35 is a diagram showing a procedure for attaching the reel spring 64 to the upper shell 51. First, FIG.
As shown in (a), the outer side of the upper shell 51 is placed downward (turned over), and the mounting hole 64c formed in the reel spring 64 is fitted into the caulking boss 51a formed on the upper shell 51 side. I do.

Next, using an ultrasonic welding machine, FIG.
As shown in FIG. 35 (c), the crimping recess 66a formed on the tip end surface of the welding horn 66 is pressed against the tip of the crimping boss 51a and heated by applying ultrasonic vibration while applying pressure. Then, the swaged boss 51a is melted and deformed. The reel spring 64 around the mounting hole 64c is locked to the upper shell 51 by the swaged boss 51a thus deformed.

[0009]

However, as shown in FIG. 35, the reel spring 64 is connected to the upper shell 51.
In addition, in the method of locking by caulking, a dedicated welding machine for caulking is required, so that equipment costs are correspondingly increased.

In addition, after the caulking boss 51a is heated and melted, it takes time to cool and solidify.
Poor assembly efficiency. Further, at the time of caulking, after the reel spring 64 was temporarily placed at a predetermined position with respect to the upper shell 51, while the upper shell 51 was transported to the welding machine, the reel spring 64 was temporarily placed at a predetermined position due to vibration or the like. There is a problem such as displacement from the position.

In a tape cassette device, when recycling its components or disposing of the device, it is necessary to separate a plastic part from a metal part. At the time of this separation, in the above-described method of locking the reel spring by caulking, if the reel spring 64 is to be separated from the upper shell 51, the reel spring 64 is greatly deformed and can be reused as it is. Disappears. Further, there is a problem that the crushed parts after the caulking boss 51a is melted and caulked as described above become extra plastic garbage and increase the amount of garbage. In view of the above problems, the present invention can reduce the equipment cost for caulking a reel spring to a case part, and can easily separate a plastic part and a metal part at the time of disposal of the apparatus, thereby recycling the part and removing dust. It is an object of the present invention to provide a tape cassette reel spring mounting structure that is advantageous in reducing the number of reels.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tape cassette comprising a leaf spring material which resiliently presses a central shaft portion of a tape reel housed in a case in an axial direction. In the reel spring mounting structure, the central portion of the leaf spring material projects substantially trapezoidally from the inner surface of the case, and both base ends of the leaf spring material press the central portion of the trapezoidal shape against the center shaft of the tape reel. When it is made to slide, it is slidably and detachably held on the case side in the longitudinal direction of the leaf spring, and slides against the leaf spring along the both side edges in the longitudinal direction of the leaf spring material to shift in the width direction. A reel spring for a tape cassette is provided, wherein a guide member for preventing the tape cassette is provided.

According to this configuration, since both base ends of the reel spring are detachably held in the case, there is no need to lock by a caulking, and it is possible to caulk with an ultrasonic welding machine or the like. Equipment costs can be reduced.

Further, since the reel spring can be easily removed from the case portion, when disposing of the tape cassette device, the plastic portion such as the case portion and the reel spring of the metal component can be easily separated. At this time, the deformation of the reel spring is small, so that it can be reused (recycled). In addition, since there is no crushed portion that occurs when the crimping head is crimped unlike the conventional case, there is no need for the conventional method. Garbage can be prevented from increasing.

Further, in a preferred embodiment of the present invention, the base end portions of both ends are locked to the case portion, and the intermediate portion presses the center portion of the tape reel so that the base end portion slides in the longitudinal direction. In the tape cassette reel spring mounting structure provided with a spring, the two base ends are divided into a pair of L-shaped cross sections that hold the base ends from both side edges, or a U-shaped cross section that is covered from the upper surface of the base end. Characterized in that it is detachably held in the case portion by the connecting type tunnel rib.

According to this configuration, since the base end is held by the tunnel rib without projecting the boss from the shell side, the thickness of the shell can be reduced.

Further, in this configuration, similarly to the above-described structure, the both ends of the reel spring are detachably held in the case portion, so that there is no need to lock by caulking, and the ultrasonic welding machine is not required. It is possible to reduce equipment costs for caulking such as.

Further, since the reel spring can be easily removed from the case portion, when the tape cassette device is disposed of, the plastic portion such as the case portion and the reel spring of the metal component can be easily separated. At this time, the deformation of the reel spring is small, so that it can be reused (recycled). In addition, since there is no crushed portion that occurs when the crimping head is crimped unlike the conventional case, there is no need for the conventional method. Garbage can be prevented from increasing.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 11
FIG. 1 is a view showing a first embodiment of a tape cassette device according to the present invention. 2 is a diagram showing the inside of the upper shell 51 (upper case) of the tape cassette device, and FIG. 1 is a diagram showing a cross-sectional view of the upper shell 51 in FIG.

As shown in FIG. 1, both base ends 4a and 4b of the reel spring 4 have first and second truncated conical heads.
It is detachably locked to the upper shell (upper case) 51 via the second bosses 6 and 7.

That is, as shown in FIG. 33, the conventional reel spring 64 is formed in a substantially U-shape, whereas the reeling press spring of the present embodiment has its base ends 4a and 4b high. 3 (see FIG. 3 (b)).

First, in the trapezoidal cross-sectional shape of one base end 4a, a slit 4c opening from the central projection of the trapezoid to the outer edge is formed. A stopper portion 4d whose height is higher than the cylindrical portion 6a of the first boss 6 is formed on both sides of the slit 4c.

FIGS. 4 and 5 show the boss 6 (7). The boss 6 (7) has a cylindrical portion 6a (7a) and a tapered truncated cone-shaped head 6b (7
b), and a split groove 6c of the gap G is provided over the entire length. For this reason, as shown in FIG.
When a force is applied from both sides of (7), the gap G is crushed, and the width becomes smaller as a whole. That is, the boss 6 (7) is
Therefore, the diameter becomes variable within the range of the gap G. In this case, the width of the slit 4c is S (FIG. 3), and the cylindrical portion 6a
Is the diameter of S0 (FIG. 4), and the larger diameter of the head 6b is S1,
Assuming that the diameter when the diameter S1 is crushed is S2, the following relationship is established.

S1>S>S2> S0 If the longitudinal length of the gap (split groove) of the head 6b is L '(FIG. 4), the relationship of S0 <L' must be established. .

FIG. 6 is a view showing a procedure for attaching the reel spring 4 to the boss 6 having a variable diameter. First, the outer side of the upper shell 51 is placed downward, and the reel spring 4
Enters between the pair of displacement preventing guide ribs 8 shown in FIG. 9A from the end of the slit 4c and slides horizontally (to the left in FIG. 6) (see FIG. 6A). . Then, the slit 4C provided on the reel spring 4 is
(See FIG. 6B). Then, on the way, the stopper 4d is moved to the head 6b of the boss 6.
Go while deforming the lower side of. At this time, the head 6b of the boss 6
As shown in FIG. 5, the stopper 4d can be easily passed through the head 4b because the gap G is crushed and deformed so as to reduce the diameter. When the stopper 4d passes through the head 6b,
The force applied from both sides of the head 6b is suddenly removed, and the head 6b of the boss 6 returns from the state shown in FIG. 5 to the state shown in FIG.

As a result, the head 6b of the boss 6 is moved to the base end 4a.
The stopper 4d and the upper surface 4e of the trapezoidal projection.
The base end 4a does not easily come off the boss 6. Base end 4
The height T of the trapezoidal cross-sectional shape a is shown in FIG.
Is fitted and locked to the height T 'of the cylindrical portion 6a of the diameter variable boss portion 6 of the above, so that the reel spring 4 is not elastically deformed than T' in order to prevent the reel spring 4 from rattling. Slightly larger or at least equal. Further, the height T ″ of the stopper portion needs to be formed higher than the columnar portion 6 a of the boss 6.

Next, the trapezoidal cross-sectional shape of the other base end 4b has an oval positioning hole 4f having a major axis L "and a minor axis S" (FIG. 3), and the major axis L " Is formed so as to coincide with the longitudinal direction of the.

Further, there is a second boss 7 having the same shape as the base end portion 4a, and at this time, the following relationship is established. S1> S ″>S2> S0 Furthermore, L ″> L ′ needs to be satisfied.

FIG. 7 is a diagram showing a procedure for attaching the base end 4b of the reel spring 4 to the boss 7 having a variable diameter.
First, the outer side of the upper shell 51 is placed downward and the base end portion 4a
Is fixed as described above.

Next, a positioning hole 4f provided in the base end 4b.
Is opposed to the head 7b of the boss 7, and the base end 4b is
(See FIG. 7A). Then, the positioning hole 4f provided in the base end portion 4b is inserted into the head 7b of the boss portion 7.
As shown in FIG. 5, the head 7b deforms so that the gap G is crushed and the diameter is reduced (see FIG. 7B).
When the positioning hole 4f of the base end portion 4b is pushed into the head 7b of the variable diameter boss 7 to the end and passed therethrough, the force applied from both sides of the head 7b of the boss 7 is suddenly removed, and the diameter is reduced. The head 7b of the variable boss 7 returns from the state shown in FIG. 5 to the state shown in FIG. For this reason, the base end 4b of the reel spring 4 is locked by the head 7b of the boss 7 and does not come off (see FIG. 7C).

The height T3 of the trapezoidal cross section of the base end portion 4b (see FIG. 3) is fitted and locked to the height T 'of the column portion 7a of the boss 7 in FIG. It is desirable that T3 is slightly larger than T 'in the elastically deformable region or at least equal to T' in order to prevent rattling.

When a force is applied to the trapezoidal intermediate portion 4g from above with the base ends 4a, 4b attached, the reel spring 4 slides in a direction in which the base ends 4a, 4b move away from each other (FIG. 8). reference). For this reason, an extra space is provided in the longitudinal direction of the reel spring 4 in the slit 4c of the base end 4a and the positioning hole 4f of the base end 4b. The spaces are located in the upper surfaces 4e and 4h, respectively. When the intermediate portion 4g presses the center of the tape reel 55, the tape slides within the space.

As shown in FIG. 9, the base ends 4a and 4b of the reel spring 4 locked by the bosses 6 and 7 have
A pair of displacement preventing guide ribs 8 are formed on both side edges along the longitudinal direction of the spring so as to integrally protrude from the upper shell 51. The pair of guide ribs 8 for preventing displacement are provided at the base ends 4a, 4b of the reel spring 4.
Are provided so as to be in sliding contact with both sides of the reel spring 4, thereby preventing the reel spring 4 from being displaced in the width direction (direction perpendicular to the longitudinal direction).

By preventing the reel spring 4 from being displaced in the width direction (the direction perpendicular to the longitudinal direction), the center of the intermediate portion 4g of the reel spring 4 is formed as shown in FIG. Section C2 and tape reel 55
And the center part C1 of the tape reel 55 can be appropriately pressed not only when the reel spring 4 is free but also when it is sliding.

If the reel spring 4 is displaced, as shown in FIG. 10B, the center C2 of the intermediate portion 4g of the reel spring 4 and the center C1 of the tape reel 55 do not coincide with each other. As a result, the intermediate portion 4g of the reel spring 4 cannot appropriately press the center portion of the tape reel 55, so that a stable spring force and the pressing direction cannot be guaranteed.

In the worst case, the reel spring 4
The center of the middle portion 4g of the tape reel 55 is largely deviated from the center of the tape reel 55, and the tape reel 55 becomes unrestricted and becomes free. When used in a VTR, the tape reel 55 does not rest on the reel base on which it is mounted. There is a possibility that the reel 55 will flutter and cannot be used.

However, as described above, in the present embodiment, since the guide ribs 8 for preventing displacement are provided, it is possible to prevent the intermediate portion 4g of the reel spring 4 from being displaced and to surely prevent such a situation. Can be.

FIG. 11 is a perspective view of a reel spring 4 according to an embodiment of the tape cassette device according to the present invention. As shown in the drawing, the center intermediate portion 4g of the reel spring 4 projects in a trapezoidal shape, and the two substrate portions 4a and 4b similarly project in a trapezoidal shape.

FIG. 12 is a view showing a reel spring 14 according to a second embodiment of the tape cassette device according to the present invention. In the first embodiment, the split end boss 6 having a variable diameter is formed at the base end portion 4a. On the other hand, in the second embodiment, there is no middle split groove at the center. The difference is that the actual boss 9 is used. In the second embodiment, when the slit groove 14c provided in the reel spring 14 is fitted into the cylindrical portion of the solid boss 9 and pushed in, the boss 6 with the split groove according to the first embodiment is pressed.
Requires some power compared to. The other configuration and operation and effect are the same as those of the first embodiment.

FIG. 13 is a view showing a reel spring 24 according to a third embodiment of the present invention. In the first embodiment, the base end 4b of the reel spring 4
Is formed in a trapezoidal cross-sectional shape, and a boss portion 7 having a split groove and a variable diameter is formed. In the third embodiment, however, a reel spring 24 is provided.
The base end 24b is flat so as to be in sliding contact with the upper shell 51, and is provided with a positioning hole 24c.
The cylindrical boss 10 having a height higher than the thickness of the reel spring 24 is fitted into 4c.

The reel spring 24 is first mounted from the base end 24a, and the base end 24b is fitted with the positioning hole 24c facing the column-shaped boss 10 approaching from above. When a force is applied to the trapezoid intermediate portion 24d, the trapezoid slides, and the intermediate portion 24d appropriately presses the center of the tape reel 55.

FIG. 14 is a view showing a reel spring 34 according to a fourth embodiment of the present invention. In the first embodiment, the base end 4b of the reel spring 4
Is formed in a trapezoidal cross-sectional shape, and a boss with a split groove and a variable diameter is formed. In the fourth embodiment, the base end 34b of the reel spring 34 is The stopper rib 34e is flat so as to be in sliding contact with the shell 51, has no positioning hole, and has no boss. Instead, the stopper rib 34e is formed so as to integrally protrude from the upper shell 51 outward in the longitudinal direction of the base end of the spring.

Such a reel spring 34 is first mounted from a base end 34a, and the base end 34b is set between a pair of deviation preventing guide ribs 8 shown in FIG. 9, and slides when a force is applied to the intermediate part 34c. Then, the end portion 34d of the base end portion 34b is stopped by the stopper portion 34e so as not to slide further, and the intermediate portion 34c appropriately presses the center portion of the tape reel 55.

FIGS. 15 to 25 show another embodiment of the present invention. FIG. 15 is a plan view showing the inside of the upper shell (case portion) 151 of the tape cassette device, and FIG. 16 is a cross-sectional view taken along the line AA in FIG. As shown, the base ends 104a and 104b of the reel spring 104 are detachably locked via tunnel ribs 106 and 107 formed integrally with the upper shell 151.

That is, as shown in FIG.
While the conventional reel spring 64 is formed in a substantially rectangular shape, the reel spring 10 according to the present embodiment is
4, as shown in FIGS. 16 and 17, a central portion protrudes in a trapezoidal shape, base ends on both sides are substantially flat, and one base end 104 b is bent to form a terminal stopper 104 e. . The other base end portion 104a is entirely the upper shell 15
1, and the boss does not protrude from the shell side as in the embodiment of the present invention shown in FIGS. Instead of the boss protruding from the shell side, the reel spring is held in the upper shell by using a tunnel rib for holding the flat upper surface of the base end. This makes it possible to reduce the width (thickness) of the upper shell 151 and reduce the thickness of the tape cassette.

FIG. 17C is a cross-sectional view taken along the line CC of FIG. 17A, and shows the tunnel rib 106 (similarly, 107). The tunnel rib 106 is of a split type, and the reel spring 104 is in a horizontal direction (a direction perpendicular to the longitudinal direction).
The reel spring 104 is held by a member that is bent in an L-shape from both sides in proximity to the edges on both sides of the base end so as not to displace. This split type tunnel rib 1
06 is formed integrally with the upper shell 151 so as to protrude from the upper shell 151.

In order to form the tunnel rib 106 so as to be integrally raised from the upper shell 151, a slide core 108 is used as shown in FIG. Slide core 1
08 is formed in the direction of the arrow in FIG. 19 to form a tunnel rib. At that time, to make it easy to pull out the slide core,
The notch 160 is opened by notching the inner wall of the upper shell. The notch 160 of the upper shell 151 is supplemented by a projecting piece 161 on the lower shell 152 side (see FIG. 20).

As described above, the tunnel rib 106 (10
7), the displacement of the reel spring 104 can be prevented, so that the center C2 of the intermediate portion 104c of the reel spring 104 matches the center C1 of the tape reel 155, as shown in FIG. The center of the tape reel 155 can always be appropriately pressed regardless of whether the spring is free or sliding.

If the reel spring 104 shifts,
As shown in FIG. 21B, the center C2 of the intermediate portion 104c of the reel spring 104 does not coincide with the center C1 of the tape reel 155, causing a deviation f. The central portion cannot be pressed properly, and a stable spring force and its pressing direction cannot be guaranteed. In the worst case, the center of the intermediate portion 104c of the reel spring 104 is largely displaced from the center of the tape reel 155, and the tape reel 155 cannot be pressed and becomes free.
However, the tape reel 155 may not be placed on the reel table on which the tape reel 155 is mounted, and the tape reel 155 may vibrate or flap during tape running, making it unusable.

On the other hand, in this embodiment, in order to prevent the position of the intermediate portion 104c of the reel spring 104 from being displaced by the tunnel rib, the center is always aligned and the tape reel is appropriately pressed to appropriately press the tape reel. Failures can be avoided.

The one base end 104b is connected to the base 10
Similar to 4a, no positioning boss through-hole is formed, and the end is bent toward the lower shell to form the end stopper 104e. When the center of the tape reel 155 is not pressed by the free end stopper 104e, the bent end stopper 1
04e hits the outer wall of the tunnel rib 107, so that the reel spring 104 cannot come off the tunnel rib.

FIG. 22 shows the structure of the tunnel rib 106 (107).
FIG. 6 is a diagram showing a procedure for attaching a reel spring 104 to the reel. First, the outer side of the upper shell 151 is placed downward, and the tunnel rib 107 is moved from the distal end 104d of the proximal end 104a.
And slide in the horizontal direction (left direction in the figure) (see FIG. 22A). When the base end 104a passes through the tunnel rib 107, the reel spring 10
The intermediate part 104c of No. 4 is pushed in (see FIG. 22B). Thereby, the reel spring 104 is deformed on the way so that the height in the vertical direction in the drawing becomes small. Intermediate part 104c
Passes through the tunnel rib 107 and slides further, the base end portion 104a enters the next tunnel rib 106. The base end 104a advances in the tunnel rib 106, and the reel spring 104 slides, and the base end 10a
When the end stopper 104e of 4b contacts the outer wall of the tunnel rib 107, the slide stops, and the reel spring 104 does not come off (see FIG. 22C). here,
The notch provided in the above-mentioned upper shell 151 not only makes the slide core easy to come off, but also makes it easy to attach and detach the reel spring 104.

The base end portion 104a slides rightward in the figure without pressing the tape reel 155 so that the end portion 104d does not fall out of the tunnel rib 106.
It is desirable to allow a margin for the length of the end face 104f (see FIG. 23).

When a force is applied to the intermediate portion 104c from above with the base ends 104a, 104b attached, the reel spring 104 is moved to the base ends 104a, 104b on both sides thereof.
Slide away from each other (see FIG. 24).
For this reason, the flat portion 104h of the base portion 104a and the flat portion 104i of the base portion 104b have the reel spring 10
4 is provided with an extra length in the longitudinal direction. This length is a length necessary for the intermediate portion 104c to appropriately press the center of the tape reel 155 when each slides (see FIG. 23).

FIG. 25 is a view showing a reel spring 104 according to an embodiment of the tape cassette device according to the present invention. FIG. 25A is a plan view, FIG. 25B is a cross-sectional view taken along the line EE of FIG. 25A, and FIG. 25C is a perspective view.

FIG. 26 shows a reel spring 11 according to still another embodiment of the tape cassette device according to the present invention.
FIG. In the embodiment described with reference to FIGS. 15 to 25, the distal end of the proximal end portion 104b is provided with the distal stopper 10.
In this embodiment, the base end 114b of the reel spring 114 is flat without the bent stopper as in the case of the base end 114a, whereas the tunnel ribs 106 and 107 are formed. And the stoppers 114d and 114e are integrally raised with the upper shell.
Are formed. The mounting method is the same as in the above embodiment.

Even when the reel spring 114 slides, stoppers 114d and 114e are provided at both ends.
The intermediate portion 114c appropriately presses the central portion of the tape reel 155 similarly to the above-described embodiment.

FIG. 27 is a view showing a reel spring 124 according to still another embodiment of the present invention. In the above-described embodiment, the tunnel rib is formed integrally with the upper shell by molding using a mold, but in this embodiment, the tunnel ribs 126 and 127 are provided by welding or bonding after the upper shell is formed. Different in that. The installation of the tunnel ribs 126 and 127 is performed as shown in FIG.
As shown in FIG. 8, welding ribs 126a (127a) are formed on the bottom surfaces of the tunnel ribs 126 and 127 (in this example, connection type tunnel ribs are shown) by welding horns 126b (12).
7b), and welding ribs 126a, 127a
Is melted and integrated with the upper shell 151.

Instead of such a welding method, the tunnel ribs may be bonded to the upper shell using an appropriate adhesive to integrate them. In this case, the welding ribs 126a, 127a
Is not provided. Instead of the connection type tunnel ribs 126 and 127, similarly to the above-described embodiment, split connection ribs 116 and 117 may be used as shown in FIG. Also in this case, welding or bonding can be performed instead of molding.

[0060]

As described above, according to the present invention,
Since the base end of the reel spring is detachably locked to the case, it is not necessary to lock the base by caulking, so that it is possible to reduce equipment costs for caulking with an ultrasonic welding machine or the like. . Also, since the reel spring can be easily removed from the case,
When discarding the tape cassette device, the plastic part such as the case part and the reel spring of the metal part can be easily separated. At this time, the deformation of the reel spring is small, so that it can be reused (recycled). In addition, since there is no crushed portion generated when the crimping head is crimped unlike the conventional case, it is unnecessary as in the conventional case. It is possible to prevent an increase in unnecessary garbage.

Further, since it is not necessary to melt the caulking boss 51a (see FIG. 20 (c)) or to cool and solidify the caulking boss 51a as in the prior art, the assembly efficiency can be improved.

Furthermore, since the reel spring 4 is locked to the boss at the same time as being locked to the boss, the reel spring 4 is temporarily placed at a predetermined position as in the prior art, so that a displacement may occur during the transfer. Never.

If the reel spring is held by the tunnel ribs instead of using the boss, the thickness of the shell (case) can be reduced and the tape cassette can be made thinner.

[Brief description of the drawings]

FIG. 1 is a sectional view of a reel spring mounting structure of the present invention.

FIG. 2 is an inside view of the upper shell according to the first embodiment of the tape cassette device according to the present invention.

3A and 3B are views showing a reel spring, wherein FIG. 3A is a plan view of the reel spring, and FIG.
E sectional drawing.

4A and 4B are views showing a state before deformation of a boss with a split groove, wherein FIG. 4A is a plan view thereof, and FIG.

5A and 5B are diagrams showing a state of the boss with a split groove when deformed, wherein FIG. 5A is a plan view thereof, and FIG. 5B is a side sectional view thereof.

6A and 6B are diagrams showing a procedure when one base end of the reel spring is locked by a second boss, wherein FIG. 6A is a diagram showing a state before the locking, and FIG. The figure which shows the state at the time of a stop, (c) The figure which shows the state after the locking.

7A and 7B are diagrams showing a procedure when the other base end of the reel spring is locked by a second boss, wherein FIG. 7A is a diagram showing a state before the locking, and FIG. The figure which shows the state at the time of a stop, (c) The figure which shows the state after the locking.

FIG. 8 is a view showing a sliding state when both base ends are locked and a force is applied to an intermediate portion, and (a) is a plan view thereof;
(B) is GG sectional drawing of (a).

FIG. 9 is a view showing a circle D portion of the upper shell in FIG. 2, (a) is an enlarged view of a locking portion of a reel spring,
(B) is a sectional view taken along line FF of (a).

10A and 10B are diagrams illustrating a positional relationship between an intermediate portion of a reel spring and a tape reel, wherein FIG. 10A is a cross-sectional diagram illustrating a normal positional relationship, and FIG. 10B is a cross-sectional diagram illustrating an abnormal positional relationship.

FIG. 11 is a perspective view of a reel spring according to the embodiment of the tape cassette device according to the present invention.

FIG. 12 is a view showing a reel spring according to a second embodiment of the tape cassette device according to the present invention;
(A) is the top view, (b) is the II sectional view taken on the line (a).

FIG. 13 is a view showing a reel spring according to a third embodiment of the tape cassette device according to the present invention;
(A) is the top view, (b) is JJ sectional drawing of (a).

FIG. 14 is a view showing a reel spring according to a fourth embodiment of the tape cassette device according to the present invention;
(A) is its top view, (b) is KK sectional drawing of (a).

FIG. 15 is a plan view of a tape cassette according to another embodiment of the present invention.

FIG. 16 is a sectional view taken along the line AA in FIG. 15;

FIG. 17 is a configuration explanatory view of the embodiment in FIG. 15;

FIG. 18 is an explanatory view of a mold structure at the time of forming a tunnel rib.

FIG. 19 is an explanatory view of a slide core removal direction during upper shell molding.

FIG. 20 is a plan view of a cutout portion of the upper shell and the lower shell of the embodiment in FIG. 15;

FIG. 21 is an explanatory diagram of a positional relationship between a reel spring and a tape reel.

FIG. 22 is an explanatory diagram of a procedure when a reel spring is locked to a tunnel rib.

FIG. 23 is a plan view of the reel spring of the embodiment shown in FIG. 15;

FIG. 24 is an explanatory view showing a sliding state when a force is applied to the reel spring of FIG. 15;

FIG. 25 is a diagram illustrating the shape of the reel spring according to the embodiment shown in FIG. 15;

FIG. 26 is a configuration explanatory view of still another embodiment of the present invention.

FIG. 27 is a configuration explanatory view of still another embodiment of the present invention.

FIG. 28 is an explanatory diagram of a procedure for attaching the connection type tunnel rib to the upper shell.

FIG. 29 is a sectional view of a split type tunnel rib.

FIG. 30 is an exploded perspective view showing a conventional tape cassette device.

FIG. 31 is an external perspective view showing a conventional tape cassette device.

FIG. 32 is a perspective view of the tape cassette device shown in FIG.
FIG.

FIG. 33 is a perspective view of a conventional reel spring.

FIG. 34 is a BB diagram of the reel spring in FIG. 32;
Line sectional view.

FIG. 35 is a sectional view showing a procedure for attaching the reel spring to the upper shell.

[Explanation of symbols]

4: reel spring, 4a, 4b: base end, 4c: slit, 4d: stopper, 4e: upper surface, 4f: positioning hole, 4g: intermediate portion, 4h: upper surface, 6, 7: boss with split groove, 6a , 7a: cylindrical portion, 6b7b: head, 8: guide rib for preventing displacement, 9: solid boss, 10: cylindrical boss, 14: reel spring, 14c: slit, 2
4: reel spring, 24a, 24b: base end, 24
c: positioning hole, 24d: intermediate portion, 34a, 34b: base end portion, 34c: intermediate portion, 34d: distal end portion, 34e: stopper portion, 51: upper shell, 51a: caulking boss, 52:
Lower shell, 55: tape reel, 55a: reel top, 58: magnetic tape, 60: M lid, 61: A lid, 64: reel spring, 64a: base end, 64
b: rear end, 64c: mounting hole, 66: welding horn,
66a: recess 104, 114, 124: reel spring, 106,
107, 116, 117, 126, 127: tunnel ribs.

Claims (9)

[Claims] 1. A tape cassette reel spring mounting structure comprising a leaf spring material for resiliently pressing a central shaft portion of a tape reel accommodated in a case in an axial direction, wherein a central portion of the leaf spring material is: Projecting from the inner surface of the case into a substantially trapezoidal shape, the two base ends of the leaf spring material are slidable and detachable in the longitudinal direction of the leaf spring when the central part of the trapezoid is pressed against the center axis of the tape reel. A tape which is held on the case side as much as possible, and has a guide member provided along the both side edges in the longitudinal direction of the leaf spring material for slidingly contacting the leaf spring to prevent displacement in the width direction. Reel spring mounting structure for cassette. 2. A base having two trapezoidal ends protruding in the same trapezoidal shape as the central part, and one trapezoidal base end having a slit opening from the protruding part toward an outer edge. Is formed on the other trapezoidal base end portion, and a long hole is formed in the protruding portion thereof. In correspondence with the slit, the case side has a head with a diameter larger than the slit width and in the longitudinal direction. A first boss having a split groove formed thereon is protruded, and a case having a head having a diameter larger than the width of the long hole on the case side corresponding to the long hole and having the split groove formed in the longitudinal direction is formed. 2. The tape cassette reel according to claim 1, wherein the first and second bosses protrude, and the first and second bosses hold the leaf spring material slidably at both base ends thereof toward the case. 3. Spring mounting structure. 3. A base portion of the leaf spring material protrudes in a trapezoidal shape in the same manner as the central portion, and one of the trapezoidal base ends has a slit opening from the protruding portion toward an outer edge. A long hole is formed in the protruding portion at the other trapezoidal base end portion, and a solid first portion having a head with a diameter larger than the slit width on the case side corresponding to the slit. A second boss having a head with a diameter larger than the width of the elongated hole and having a split groove formed in the longitudinal direction on the case side corresponding to the elongated hole, 2. The tape cassette reel spring mounting structure according to claim 1, wherein the first and second bosses hold the leaf spring material to the case side such that both base ends thereof are slidable. 4. A base end of the leaf spring material protrudes in a trapezoidal shape as in the central portion, and a slit opening from the protruding portion toward an outer edge portion in the trapezoidal base end. The other base end portion is entirely in sliding contact with the inner surface of the case and is formed with a long hole, and corresponding to the slit, a solid or having a head with a diameter larger than the slit width on the case side. A first boss having a split groove formed in the longitudinal direction is protruded, and a solid second boss fitted into the elongated hole is protruded toward a case. The first and second bosses provide a plate. 2. The tape cassette reel spring mounting structure according to claim 1, wherein the spring material is held on the case side so that both base ends thereof are slidable. 5. A base end of the leaf spring material protrudes in a trapezoidal shape like the central portion, and a slit opening from the protruding portion toward the outer edge portion is formed in the trapezoidal base end. The other base end is entirely in sliding contact with the inner surface of the case, and corresponding to the slit, a solid groove having a head with a diameter larger than the slit width on the case side, or the split groove in the longitudinal direction. 2. The tape cassette reel spring mounting structure according to claim 1, wherein a boss formed with a boss is protruded, and a stopper is provided on a longitudinally outer side of the other base end. 6. A tape cassette having a reel spring in which base ends at both ends are locked to a case part, and an intermediate part thereof presses a center part of the tape reel so that the base end slides in a longitudinal direction. In the reel spring mounting structure, the two base ends may be a pair of split-type tunnel ribs having an L-shaped cross section for holding the base ends from both edge sides or a connection type tunnel rib having a U-shaped cross section to be covered from the upper surface of the base end. A reel spring mounting structure for a tape cassette, wherein the reel spring mounting structure is detachably held by a case portion. 7. A base end of one of the reel springs has a planar shape, and a split-type or connection-type tunnel rib is formed in the case, and the base is detachably connected to the case. The other base end has a planar shape and its distal end is bent, and a tunnel rib is formed on the case portion so that the base end can be detachably locked. Item 7. A tape cassette reel spring mounting structure according to Item 6. 8. The tape cassette reel spring mounting structure according to claim 6, wherein a stopper rib is provided on the case portion on the outer side in the sliding direction of at least one base end portion. 9. The tape cassette reel spring mounting structure according to claim 6, wherein said tunnel rib is integrated with said case portion by molding or welding or bonding.