JPH06321432A - Bobbin for transfer film - Google Patents

Abstract

(57) [Abstract] [Purpose] When constructing a bobbin with a hollow tube and a drive member, the connecting operation between the two is simple and reliable. [Structure] An arm member 25 having a tip portion of a claw portion 24 that is inclined outwardly is formed in a tubular portion 23 of a drive member 2 by a pair of notches 26. Hole 1 into which the claw portion 24 of the arm portion 25 is fitted and locked
4 is provided close to the open end a of the hollow tube 1. Since the drive member 2 is attached after the transfer film is wound on the hollow tube 1, the transfer film winding device can be simplified. Both can be connected by simply inserting the cylindrical portion 23 of the drive member 2 into the open end a of the hollow tube 1 and pushing it in. Since the claw portion 24 of the arm portion 25 is fitted and locked in the hole 14 of the hollow tube 1 to prevent the movement of both, the connecting portion does not come off or loosen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer film bobbin for winding a transfer film for heat-sensitive transfer recording into a roll.

[0002]

2. Description of the Related Art Conventionally, a transfer film used in a thermal transfer printer is in a state of being wound on a pair of bobbins of a supply side bobbin and a winding side bobbin, or in a state where these pair of bobbins are accommodated in a cassette case. It is supplied by.

[0003]

By the way, normally, a driving portion for transmitting rotation from the printer is integrally provided at the end of the bobbin as described above. Since there are various types depending on the type, it is necessary to prepare a rotating mechanism adapted to each drive part in the device for winding the transfer film. Therefore, the bobbin is composed of a hollow tube and a driving member that fits into the open end of the hollow tube, and the rotary shaft is inserted into the open end of the hollow tube to rotate the bobbin for winding the transfer film. It is conceivable to connect the drive members after they have been taken up and wound. In this way, the transfer film can be wound on the common rotating shaft, but it is difficult to connect the hollow tube and the driving member without detaching or loosening them and by a simple operation. The problem remains.

The present invention has been made in view of the above problems, and an object of the present invention is to easily perform a connecting operation between a hollow tube and a driving member and to remove or loosen the connecting portion. To provide a bobbin for a transfer film that does not do.

[0005]

In order to achieve the above object, the transfer film bobbin of the present invention comprises a hollow tube having a rotation supporting portion at one end and an opening at the other end, and an opening of the hollow tube. It is composed of a driving member having a tubular portion that is inserted into the end without a gap, and the tubular portion of the driving member has an arm portion provided with a claw portion that inclines outward and is defined by a pair of notches, It is characterized in that a hole into which the claw portion of the arm portion is fitted and locked when the tubular portion of the drive member is inserted into the open end of the hollow tube is provided at a position close to the open end of the hollow tube, Further, it is preferable that a reinforcing plate portion is provided on the back side of the arm portion.

[0006]

In the transfer film bobbin of the present invention having the above-described structure, the drive member and the hollow tube are integrated by inserting and pushing the tubular portion of the drive member into the open end of the hollow tube. In this case, the arm portion bends inward, the tubular portion enters the hollow tube, and the claw portion of the arm portion fits into and locks the hole of the hollow tube, so that the hollow tube and the driving member move relative to each other. Act to block.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a transfer film bobbin as an embodiment of the present invention. As shown in FIG. 1, the transfer film bobbin is a combination of two members, a long hollow tube 1 and a driving member 2. Consists of

The hollow tube 1 is formed by injection molding impact-resistant polystyrene or the like, and is provided with a rotation support portion 13 via a flange 12 at one end of a body portion 11 for winding a transfer film. As shown in, the other end is open. A rectangular hole 14 is provided at a position close to the open end a, and a ring-shaped protrusion 15 is provided on the inner side thereof. Further, as shown in FIGS. 2 and 3, three grooves 16, 17 and 18 are provided at equal intervals on the inner surface of the open end a with one groove 16 corresponding to the hole 15. Between groove 17 and groove 18 (groove 16
On the opposite side), a rectangular cutout 19 is provided.

The drive member 2 is formed by injection molding an engineering plastic such as acetal resin.
As shown in FIG. 3, it comprises a disc portion 22 having a driven portion 21 such as a gear (not shown) on its outer periphery, and a cylindrical portion 23 concentrically protruding from the disc portion 22. The tubular portion 23 is formed with an outer diameter that allows it to be inserted into the hollow tube 1 without any gap, and the outer periphery of the distal end of the tubular portion 23 is formed to have a slightly smaller diameter to facilitate insertion. An arm portion 25 having an outwardly facing claw portion 24 at its tip is defined by a pair of notches 26, 26 at the tip of the cylindrical portion 23, and the arm portion 25 is fitted into the groove 17 at the rear side. A ridge 27 is provided, and a contact portion 28 larger than the ridge 27 is continuously provided behind the ridge 27. Further, two long ridges 29 that fit into the grooves 18 and 19 are provided on the outer surface of the tubular portion 23, and abutting portions 30 larger than the ridges 29 are continuous behind each ridge 29. Is provided. The end surfaces of the contact portions 28 and 30 on the tip side are on the same circumference on the outer surface of the tubular portion 23, and the distance between the rear end surface of the claw portion 24 and the tip surfaces of the contact portions 28 and 30 is medium. It is equal to the distance between the hole 14 and the open end a in the empty tube 1. Further, in this embodiment, as shown in FIGS. 5 and 6, the reinforcing plate portion 3 reaching the base portion of the disc portion 22 is a thin plate on the back side of the arm portion 25.
1 is provided so as to project inward.

The rotation support portion 13 of the hollow tube 1 is rotatably supported and is rotated with the rotation shaft inserted through the open end a to wind the transfer film.
In this case, the transfer film is wound around the body 11 of the hollow tube 1, that is, the region between the flange 12 and the ridge 15.
After winding a predetermined amount of transfer film in this way,
The tubular portion 23 of the drive member 2 is inserted into the open end a of the hollow tube 1 and pushed in to connect them to form a bobbin.

In order to integrate the hollow tube 1 and the driving member 2,
The ridge 27 on the outer periphery of the tubular portion 23 is inserted into the groove 16 of the hollow tube 1 and the tubular portion 2
The cylindrical portions 23 are inserted into the hollow tube 1 and pushed in so that the protrusions 29 on the outer periphery of the hollow tube 3 fit into the grooves 18 and 19 of the hollow tube 1, respectively. By this pushing operation, the arm portion 25 of the tubular portion 23 bends inward, and the tubular portion 23 enters into the hollow tube 1. In this case, since the notch 19 is provided at the open end a of the hollow tube 1, the hollow tube 1 allows a slight expansion when the arm portion 25 does not flex sufficiently. The tip surfaces of the abutting portions 28 and 30 of the tubular portion 23 are hollow tubes 1
At the same time as it contacts the open end a of the claw 2 as shown in FIG.
4 is fitted and locked in the hole 14 of the hollow tube 1. And the tubular portion 2
Since the claw portion 24 is kept fitted in the hole 14 of the hollow tube 1 by the elastic force of the arm portion 25 of No. 3, the hollow tube 1 and the driving member 2 are firmly fixed without rattling. Further, in this embodiment, since the reinforcing plate portion 31 is provided on the back side of the arm portion 25, the fitting and locking force of the claw portion 24 is further increased.

[0013]

As described above, since the transfer film bobbin of the present invention is formed by winding the transfer film on the hollow tube and then attaching the driving member, the transfer film winding device is simplified. Moreover, it is possible to easily perform the connecting operation between the driving member and the hollow portion by inserting the cylindrical portion of the driving member into the open end of the hollow tube and pushing it in. The claws are fitted in and locked in the holes of the hollow tube to prevent mutual movement of the hollow tube and the drive member, so it is possible to securely fix both without disconnecting or loosening the connecting part. Have advantages.

[Brief description of drawings]

FIG. 1 is a top view showing a transfer film bobbin as one embodiment of the present invention in a state where respective members are separated from each other.

FIG. 2 is an enlarged perspective view showing the vicinity of an open end of a hollow tube.

FIG. 3 is a partially enlarged cross-sectional view near the open end of the hollow tube.

FIG. 4 is an enlarged perspective view showing a driving member.

FIG. 5 is a partially enlarged cross-sectional view of a tubular portion of the drive member.

FIG. 6 is a front view showing a part of a driving member in an enlarged manner.

FIG. 7 is an enlarged sectional view of an essential part showing a connected state of the hollow tube and the driving member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow tube 13 Rotation support part a Open end 14 Hole 2 Drive member 23 Cylindrical part 24 Claw part 25 Arm member 26 Notch 31 Reinforcement plate part

Claims (2)

[Claims] 1. A driving member comprising a hollow tube having a rotation support portion at one end and an opening at the other end, and a driving member having a tubular portion that is inserted into the open end of the hollow tube without a gap. An arm portion having an outwardly inclined claw portion at its tip is defined by a pair of notches in the cylindrical portion, and the claw portion of the arm portion when the cylindrical portion of the drive member is inserted into the open end of the hollow tube. A bobbin for a transfer ribbon, wherein a hole for fitting and locking is provided at a position close to the open end of the hollow tube. 2. The transfer film bobbin according to claim 1, wherein a reinforcing plate portion is provided on the back side of the arm portion so as to project therefrom.