JPS61158486A - Thermal transfer ink ribbon cassette - Google Patents

Abstract

PURPOSE:To prevent electric charging from occurring in a cassette, by providing a plurality of ports for electric discharge in at least one of a cassette casing and a cassette cover. CONSTITUTION:The cassette casing 2 is provided with a multiplicity of relatively small diameter ports 9 for electric discharge over a substantially entire surface of a bottom surface, and the cassette cover 3 is also provided with a plurality of ports 10 for electric discharge. When an ink ribbon cassette 1 is fitted to a carriage and printing is conducted, electrostatic charges are generated due to friction of a thermal printing head 2 with an ink ribbon 6 or friction of the casing 2 with reels 4, 5, and the interior of the cassette 1 tends to be electrically charged to a high voltage. However, since the ports 9, 10 are provided in the casing 2 and the cover 3, internal electric charges can be sequentially discharged to the exterior through the ports, whereby the cassette 1 is prevented from being electrically charged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of an ink+7 & ink cassette for thermal transfer.

[Prior art]

Thermal transfer ink cartridges and F7 cassettes are used in thermal transfer recording devices (Grill/Print, Tsuaku Vmm, etc.). This thermal transfer type recording device is configured to carry an ink generation cassette on a carriage that moves along the paper, and perform thermal transfer recording while feeding increments between the thermal print head and the paper.

ahψ Ink riser cassette A supply reel and a take-up reel are provided in the cassette case, and the ink ink on the supply reel is wound onto the take-up reel through the thermal print head insertion part during printing operation. There is. The take-up reel is rotationally driven by a drive shaft provided on the carriage. Further, the cassette case is closed by attaching a cassette lid.

Incidentally, the cassette case and the cassette lid are generally made of a non-conductive material such as glass, and during the printing operation, the cassette case and the ink cartridge are exposed due to chipping or other causes.

1) Friction between the thermal print head and increment ii) Friction between the cassette case and each reel li) Friction between the cassette case and each reel lv) Process of transferring ink to paper ■) Ink reel is peeled off from the supply reel Due to these processes, the following problems occur.

i) The user touches the cassette and feels it.

11) Due to the charging of the cassette, data signals and operation signals from the CPU may be disturbed, causing the device to malfunction and stop.

III) Electronic elements such as the CPU may be damaged due to the charging of the cassette.

Therefore, in order to eliminate such charging 0rIIJ problem,
So far, many countermeasures have been proposed.

First, there is a method to dissipate the charge by providing a static elimination brush. However, this method has problems with the external appearance 11 and also increases the size of the device and increases the cost.

There is also a method of electrically processing the problem by adding a ground wire, a container, a shield plate, etc. to the control circuit. However, this method also requires a complicated and large circuit configuration, which increases costs.

〔the purpose〕

An object of the present invention is to solve the above-mentioned conventional problems and to prevent charging of an impyyie cassette for thermal transfer using a simple and inexpensive method.

〔overview〕

The present invention achieves the above object by forming a plurality of discharge ports in at least one of the cassette case and the lid.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of an ink cartridge for thermal transfer according to the present invention, and FIGS. 2 and 3 show a cassette case and a cassette lid in FIG. 1.

In FIG. 1, an ink cartridge M7 cassette 1 for thermal transfer has a casing consisting of a cassette case 2 and a cassette lid 3. A supply reel 4 and a take-up reel 5 are pivotally supported within the cassette case 1. The ink-clean 6 is wound onto the reel 5. The front side of the cassette case 2 has a recess 7 for inserting the thermal print head.
is formed and ink 9? The tube 6 is guided through the recess.

When the cassette 1 is mounted on the middle sprocket, the ribbon drive shaft on the middle sprocket engages with the take-up reel 5, and the thermal print head is inserted into the recess 7, and the ribbon is taken up. ) +
)--by driving the ink 9&n 6) from above the supply reel 4, travels through the recess 7 and is wound onto the take-up creel 5.

Note that a hole 8 is formed in the cassette lid 3 for inserting a loosening stopper to prevent the door from loosening during transportation of the cassette.

However, as shown in FIG. 2, a plurality of discharge ports 9 are formed in the cassette case 2. In the illustrated example,
What's on the bottom of cassette case 2? A large number of relatively small-diameter ports 9 are formed over the entire area.

Further, as shown in FIG. 3, the cassette lid 3 is also formed with a plurality of discharge ports 10.

This opening 10 also has cassette lid 3! It is formed by arranging a large number of relatively small diameter openings across the entire area.

When Inokuri places the 7 cassette 1 on the printer and prints, static electricity is generated due to the aforementioned causes such as friction between the thermal print head and the ink ribbon 6 and friction between the cassette case 2 and each reel 4 and 5. However, according to the illustrated embodiment, a plurality of discharge holes 9 are provided in the cassette case 2 and the cassette lid 3.
, 10, internal charges can be sequentially discharged to the outside through these ports, and charging of the cassette 1 is prevented.

Therefore, it is possible to eliminate problems caused by charging, such as electric shock to the user, malfunction of the recording device due to disturbance of electrical signals, and damage to the alpha element of the CPU or the like.

In the illustrated example, a large number of ports 9 and 10 are formed in both the cassette case 2 and the cassette lid 3, but in some cases, a sufficient discharge effect may be obtained by forming ports in either one. It is possible to achieve the same effect.

Further, regarding the number of ports 9 and 100, in addition to providing a large number of small diameter ports as shown in the figure, relatively large diameter ports may be provided at an appropriate number of locations.

Further, the shape of the openings 9 and 10 is not limited to a circular shape, but can be polygonal or elongated, or can be slit-shaped.

〔effect〕

As is clear from the above description, according to the present invention, since a plurality of discharge ports are provided in at least one of the cassette case and the cassette lid, charging inside the cassette can be prevented.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the inkliso/cassette for thermal transfer according to the present invention with the cassette lid separated, Fig. 2 is a plan view of the cassette case of Fig. 1, and Fig. 3 is the cassette of Fig. 1. It is a top view of a lid. 1...--inkliso/cassette. 2. Tocasset case. 3... Urn cassette lid. 9.10...Dōguchi. Figure 3 Procedural amendment (method) % formula % 3. Relationship with the person making the amendment Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo. Name (100) Canon Co., Ltd. Representative Ryu Kaku Sanbe 4, Agent 101 Address 3-3-9-5 Kanda Kajicho, Chiyoda-ku, Tokyo
, Date of amendment order April 30, 1985 (shipment date) Amended.

Claims (1)

[Claims] (1) An ink ribbon cassette for thermal transfer in which a plurality of discharge holes are formed in at least one of the cassette case and the cassette lid.