JPH05246101A - Cassette case - Google Patents

Abstract

PURPOSE:To provide a cassette case which can be assembled excellently by using coil spring as a pressing member. CONSTITUTION:On other side wall 12 of a case body 10 housing a feeding bobbin 30 and a take-up bobbin 40, a pressing case 20 is mounted for assembling. Housing cylinder sections 24 of the pressing case 20 house coil springs having thrust plates 25 on the tips thereof. By pressing energizing force of the coil springs, radial recesses 33a and 43a provided at flanges 33 and 43 of the bobbins 30 and 40 engage with ribs provided on the inner peripheral face of an opening 17a of the case body 10, so that the rotations of the bobbins 30 and 40 are stopped and occurrence of slack in a transfer film F is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette case used by being loaded in a transfer printer.

[0002]

2. Description of the Related Art Conventionally, as a cassette case of this type, a cassette case body has a transfer film supply bobbin and a take-up bobbin rotatably supported at predetermined intervals on opposite sides thereof. It is common. In order to prevent the bobbin from spinning and the transfer film from loosening when it is not used, it is known that each bobbin does not rotate unless the cassette case is loaded into the printer (for example, Jikken 1 -139563).

The cassette cases described in the above publications are the same as the cassette cases that have been known for a long time.
The radial recesses on the bobbin end face are locked against the ribs on the case body by the pressing biasing force of the coil spring. An elastic member such as a leaf spring is used in place of the coil spring, and a friction member such as a ring-shaped rubber washer is interposed between the bobbin end surface and the case body. It is designed to prevent idling by pressure contact.

[0004]

However, in the above cassette case, the slack of the transfer film is surely prevented at the start of use, but when the deformation stroke of the leaf spring is short or the frequency of use increases, the elasticity of the leaf spring is increased. Since the force weakens, the pressing force on the friction member is unstable,
There is a problem that the slack of the transfer film cannot be reliably prevented over the entire usage period. Therefore, in order to reliably prevent the transfer film from slackening over the entire usage period, it is preferable to use a coil spring to engage the recess on the end face of the bobbin with the rib on the case body side to prevent idling even when the assembly is troublesome. It is a thing.

The present invention has been made in view of the above problems and circumstances, and an object of the present invention is to provide a cassette case which is easy to assemble while using a coil spring as a pressing member. To do.

[0006]

In order to achieve the above object, the cassette case of the present invention comprises a pair of supporting portions on both side walls of a supply bobbin and a take-up bobbin on which transfer films are respectively wound. The drive side of each bobbin comprises a case body rotatably supported at a predetermined interval and reciprocally supported between the two support portions, and a pressing case attached to the outside of the other side wall of the case body. The collar portion is provided with a plurality of radially formed recesses, and the pair of support portions on one side wall of the case body has an opening into which a drive shaft of the bobbin driving side is fitted and an inner surface around the opening. Is provided with a rib that engages with the recess, and a pair of support portions on the other side wall of the case body is provided with a hole into which a support shaft on the side opposite to the drive side of each bobbin is fitted. The pressing case is provided with a coil spring with a thrust plate for pressing the support shaft on the side opposite to the drive side of the bobbin protruding from the pair of holes in the other side wall of the case body. It has a feature.

[0007]

The cassette case having the above structure is assembled by attaching the pressing case, on which the coil spring is disposed, from the other side of the case body. Then, the coil spring presses the support shaft of the bobbin on the side opposite to the drive side, and as a result, the recessed portion of the collar portion on the drive side of the bobbin engages with the rib provided on the drive side of the case body. Is prevented from rotating.

[0008]

1 is a perspective view showing an embodiment of a cassette case according to the present invention, and FIG. 2 is an exploded perspective view. Figure 1
As shown in FIG. 2 and FIG. 2, the cassette case C includes a case body 10 and a pressing case 20.
Is attached to the outside of the other side wall 12 of the opposite side walls 11 and 12 of the case body 10.

The case body 10 is an injection-molded product of synthetic resin, and on both sides between the side walls 11 and 12 of the case body 10, storage portions 13 and 14 curved in an arc shape are formed, and An opening 15 into which the transfer head of the printer is inserted is formed in the center thereof. Further, a hole 16 for positioning lock when the printer is mounted is formed in one side wall 11.

Both ends of the one side wall 11 have a semi-circular erected portion to form a supporting portion 17, and each supporting portion 17 has a circular hole-shaped opening 17a. .. Further, both ends of the other side wall 12 also have a semicircular erected portion to form a supporting portion 18, and each supporting portion 18 is formed with a square hole 18a. Also,
As can be seen with reference to FIG. 3, vertical ribs 17b are provided on the inner surface of the periphery of the opening 17a, and the upper and lower ends of each support portion 18 have outwardly extending engagement projections 19a and 19b.
Is provided.

The pressing case 20 is an injection-molded product made of synthetic resin similar to the case body 10, and as shown in FIGS. 4 and 5, the side to be attached to the case body 10 is open and its longitudinal section. Is a spectacle type and has a shape that exactly fits the other side wall 12 of the case body 10, and has cylindrical portions 21 on both sides and a connecting portion 22 that connects the cylindrical portions 21.
And a bottom wall 23. Each of the cylindrical portions 21 is integrally formed with a storage cylinder portion 24 so as to stand upright from a bottom wall 23. Inside the storage cylinder portion 24, a thrust plate 25 is provided at its tip as shown in FIG. The coil spring 26 attached to is stored. And the storage cylinder 2
A cross-shaped protrusion 27 is provided on the bottom of the coil spring 4 so that the rear end of the coil spring 26 can be hooked. Further, engaging holes 28a and 28b for locking the engaging protrusions 19a and 19b are formed above and below each cylindrical portion 21. Further, the bottom wall 23 is provided with a recess 29 for positioning when the printer is mounted.

The storage portion 13 of the case body 10,
A supply bobbin 30 around which a transfer film F is wound in a state in which it is positioned between the pair of support portions 17 and 18.
A bobbin 40 for winding is supported. That is, the support shafts 31 and 41 on one end side of the bobbins 30 and 40 are fitted into the openings 17a of the support parts 17, and the support shafts 32 and 42 on the other end side are fitted into the square holes 18a of the support parts 18, respectively. ,
Each bobbin 30, 40 is rotatably supported by the support parts 17, 18
It is supported so that it can move back and forth. Collars 33, 43 are integrally provided at the roots of the support shafts 31, 41 on one end side, and recesses 33a, 43a are radially provided on the outer surface of the flanges 33a, 43a. Part 17
The rib 17b provided on the inner surface of the is detachable. Further, annular flanges 34, 44 are integrally provided at the bases of the support shafts 32, 42 on the other end side, and the transfer film F has flange parts 33, 43 on one end side and a flange part on the other end side. 34,4
It is wound on each bobbin 30, 40 between four. A plurality of drive locking ribs 31a and 41a are respectively provided on the inner surfaces of the support shafts 31 and 41 on one end side so as to project therefrom. Further, the tips of the support shafts 32, 42 on the other end side are rounded in a hemispherical shape.

In the cassette case C having the above structure, after the bobbins 30 and 40 are housed in the case body 10, the pressing case 20 is pressed against the other side wall 12 side of the case body 10, and the other side wall 12 is engaged. Protrusions 19a, 19b
And the engaging holes 28a and 28b in the pressing case 20 are fitted to each other and fixed to each other to assemble. Then, in the assembled state, the coil spring 26 presses the shafts 32, 42 on the other end side of the bobbins 30, 40 via the thrust plate 25, whereby the bobbins 30,
Recesses 33a, 4 in the flanges 33, 43 on one end side of 40
3a is engaged with the rib 17b, so that each bobbin 3
The idle rotation of 0 and 40 is reliably prevented, and the transfer film F
The slack is prevented. Also, when mounted on a printer, the support shaft 3 on one end side, which is the drive side,
1, 41 are pressed against the pressing force of the coil spring 26, the recesses 33a, 43a are released from the ribs 17b, and the bobbins 30, 40 are rotatable. Further, since the support shafts 32, 42 on the other end side are pushed by the thrust plate 25 in a point contact state, the transfer film F runs in a stable state.

Further, when the cassette case C is assembled, the supply bobbin 30 and the winding bobbin 40 around which the transfer film F is wound are inserted between the pair of supporting portions 17 and 18 of the case main body 10, respectively. In addition, by the simple work of attaching the pressing case 20 to the other side wall 12 side of the case body 10, the pressing case 20 does not come off from the case body 10, and the bobbins 30 and 40 do not run idle inside the case body 10. It can be stored rotatably.

[0015]

As described above, the cassette case of the present invention can be assembled by attaching the pressing case having the coil spring to the side wall of the case body, so that the coil spring serves as a pressing member for preventing rotation of the bobbin. Despite being used, the coil spring can be easily assembled without bouncing during assembly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cassette case according to the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a perspective view of the case main body viewed from different angles.

FIG. 4 is a front view of a pressing case.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a perspective view of a coil spring integrated with a thrust plate.

[Explanation of symbols]

 C cassette case F transfer film 10 case body 11, 12 side wall 17 support 17a opening 17b rib 18 support 18a hole 20 pressing case 25 thrust plate 26 coil spring 30 supply bobbin 33 collar 33a recess 40 winding bobbin 43 collar 43a recess

Claims (1)

[Claims] 1. A feed bobbin and a take-up bobbin, each having a transfer film wound thereon, are rotatably spaced at a predetermined interval by a pair of support portions on opposite side walls, and reciprocally movable between the support portions. The case body supported and a pressing case attached to the outside of the other side wall of the case body, the collar portion on the drive side of each bobbin is provided with a plurality of radially recessed portions, An opening into which a supporting shaft on the drive side of the bobbin is fitted and a rib that engages with the recess are provided on the inner surface around the opening in a pair of support portions on one side wall of the case body, and the other side wall of the case body is provided. In the pair of support portions, there is provided a hole into which a support shaft on the opposite side to the drive side of each bobbin is fitted, and in the pressing case, a pair of support on the other side wall of the case body is provided. A cassette case, wherein a coil spring with a thrust plate that presses a support shaft on the side opposite to the drive side of the bobbin protruding from the hole of the portion is provided.