JPH05238086A - Paper cutter of printer apparatus - Google Patents

Abstract

PURPOSE:To ground a paper cutter without using a lead wire by connecting a part of a paper cutting member in touch with a metallic part of a printer unit when a main body and a lid body of a casing box are fitted with each other. CONSTITUTION:In order to connect a paper cutter 5 and a printer unit 2 to be conductive, a touching element 5a is provided in the paper cutter 5. When a lid body 3b with the paper cutter 5 is fitted with a main body 3a, the touching element 5a bent to project toward the main body 3a is brought in touch with a metallic frame 2a of the printer unit 2 and turned conductive. Since the metallic frame 2a is kept in touch with an earthing part of wiring substrates 6, 7, the paper cutter 5 is connected to the earthing part of the whole of a handy data terminal, and the electric charges discharged to the paper cutter 5 are scattered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a paper cutter arranged at a discharge port for printed paper in a handy data terminal or the like equipped with a printer device and for cutting the discharged paper.

[0002]

2. Description of the Related Art FIG. 2 is an exploded view of a printer device portion of a handy data terminal.
Is a printer unit 2 including a printing mechanism.
1 is configured to be housed in a housing 22 including a main body 22a and a lid 22b. The printer unit 21 is attached to the main body 22a together with the wiring boards 23 and 24,
It is connected to a handy data terminal (not shown). Body 2
2a and lid 22b are formed by plastic molding, and are fitted together to form housing 22. Lid 22
A discharge port for the printed paper discharged from the printer unit 21 is provided on the upper surface of b. The printer unit 21 prints the print information output from the data terminal on the paper supplied from the roll paper housed in the housing 22. Since the paper portion used for printing is discharged from the discharge port 25, a paper cutter 26 made of a metal member is provided at the discharge port forming portion of the lid 22b in order to cut it off as needed. Since the paper cutter 26 is provided on the lid 22b in consideration of the operability of paper cutting, it is separated from the printer unit 21 and is attached to the plastic lid 22b which is an insulator. Therefore, the printer unit 21 is also electrically insulated from the printer unit 21. Therefore, when the static electricity charged on the body is discharged to the paper cutter 26 when the paper is cut, the static electricity is secondarily discharged to the metal portion of the printer unit 21 located at a close distance. Electronic components such as semiconductor components are used in the printer unit 21 or the connected handy data terminal, and electrostatic discharge may cause malfunction or failure of the device. In order to prevent this discharge, a grounding process is performed in which the lead wire 27 is drawn out from the paper cutter 26 and electrically connected to the metal portion of the printer unit 21 as shown in the figure.

[0003]

However, the grounding means for connecting the paper cutter 26 to the metal portion of the printer unit 21 by the lead wire 27 as shown in the above-mentioned conventional example has the following problems. It was (1) The lead wire is likely to be sandwiched between the main body 22a and the lid 22b during assembly, and the lead wire 27 may be cut when sandwiched. (2) The lead wire 27 may come into contact with the driving portion of the printer unit 21 and cause a malfunction. (3) Mounting work of lead wire 27 and main body 22a and lid 2
Since the lead wire 27 is connected to 2b, the number of assembling steps and the difficulty of the work are increased. (4) The roll paper, which is the paper for printing, requires the work of opening and replacing the lid 22b as it is consumed, but the workability of the replacement is poor because the lid 22b is connected by the lead wire 27. The present invention has been made in view of the above problems, and an object of the present invention is to provide a paper cutter for a printer device that can perform grounding of the paper cutter without using a lead wire.

[0004]

In order to achieve the above-mentioned object, the means adopted by the present invention is to install a printer unit on the main body side of a casing composed of an insulator and fitted to each other. In a paper cutter of a printer device, which is configured so that the paper that is accommodated and discharged from the printer unit can be cut off by a metal paper cutting member attached to the lid side, the main body of the housing and the lid body are separated. When fitted, a part of the paper cutting member is configured to be in conductive contact with the metal portion of the printer unit.

[0005]

According to the present invention, the paper cutter disposed on the lid side of the paper discharge port of the printer device, when the lid is fitted to the main body, has a part thereof conductively contacting the metal portion of the printer unit. Therefore, the paper cutter is grounded without using lead wires. Therefore, even when static electricity from the body is discharged to the paper cutter,
It is possible to prevent adverse effects on electronic components provided in the printer unit and the handy data terminal connected to the printer unit without generating secondary discharge.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and do not limit the technical scope of the present invention. FIG. 1 shows the structure and arrangement of the paper cutter of the printer device according to this embodiment, and is an exploded view of the printer device portion of the handy data terminal. In Figure 1,
The printer device 1 is configured such that a printer unit 2 including a printing mechanism is housed in a housing 3 including a main body 3a and a lid 3b. The printer unit 2 is attached to the main body 3a together with the wiring boards 6 and 7, and is connected to a handy data terminal (not shown). The main body 3a and the lid 3b are formed by plastic molding and are fitted to each other to form the housing 3. A discharge port for the printed paper discharged from the printer unit 2 is provided on the upper surface of the lid 3b. The printer unit 2 has a housing 3
The printing information output from the data terminal is printed on the printing paper contained in the roll paper. Since the paper portion used for this printing is discharged from the discharge port 4, a paper cutter 5 made of a metal member is provided in the discharge port forming portion of the lid body 3b in order to cut it off as needed. The paper cutter 5 is attached to the lid body 3b in consideration of the operability of paper cutting (pulling up to the lid body and trimming), so that the paper cutter 5 is separated from the printer unit 2 and is an insulator. Since it is attached to the plastic lid 3b,
It is also electrically insulated. Therefore, when the static electricity charged on the body is discharged to the paper cutter 5 at the time of cutting the paper, the static electricity applied to the paper cutter 5 is secondarily discharged to the metal portion of the printer unit 2 in the close range. Electronic components such as semiconductor components are used in the printer unit 2 or the connected handy data terminal, and electrostatic discharge may cause malfunction or failure of the device. Therefore, if the paper cutter 5 can be conductively connected to the metal portion of the printer unit 2, secondary discharge does not occur, and thus the above-mentioned discharge failure can be prevented. In order to establish a conductive connection between the paper cutter 5 and the printer unit 2, a contact piece 5a is provided on the paper cutter 5 as shown in the figure, and a lid 3b to which the paper cutter 5 is attached is attached to the main body 3a.
The contact piece 5a bent and projected toward the main body 3a comes into conductive contact with the metal frame 2a of the printer unit 2 when fitted to the main body 3a. Since the metal frame 2a is connected to the ground portion of the wiring boards 6 and 7, the paper cutter 5 is connected to the ground portion of the entire handy data terminal, and the electric charge discharged to the paper cutter 5 is diffused.

[0007]

As described above, according to the present invention, when the lid and the main body are fitted to each other, the paper cutter attached to the lid can be brought into conductive contact with the printer unit without using a lead wire. Since the lead wire is not required, the workability of assembling is improved, and the replacement work can be easily performed even when the lid is opened when the user replaces the roll paper. Further, the use of the lead wire solves the problems that have occurred conventionally, such as pinching between the lead wire lid and the main body and contact with the drive portion of the printer unit.

[Brief description of drawings]

FIG. 1 shows the structure and arrangement of a paper cutter of a printer device according to an embodiment of the present invention, and is an exploded configuration diagram of a printer device portion of a handy data terminal according to the embodiment.

FIG. 2 is a diagram showing the structure and arrangement of a paper cutter of a printer device according to a conventional example, and an exploded configuration diagram of a printer device portion of a handy data terminal.

[Explanation of symbols]

 1-Printer device 2-Printer unit 3-Case 3a Main body 3b Lid 4 Discharge port 5 Paper cutter 5a Contact piece (part of paper cutter)

Claims (1)

[Claims] 1. A metal in which a printer unit is housed in a main body side of a housing formed of an insulating material and fitted to each other and a main body and a lid body, and paper discharged from the printer unit is attached to the lid body side. In a paper cutter of a printer configured to be cut off by a paper cutting member made of paper, when the main body of the casing and the lid are fitted together,
A paper cutter for a printer, wherein a part of the paper cutting member is configured to be in conductive contact with a metal part of the printer unit.