JPH05116422A - Printing device - Google Patents

Abstract

PURPOSE:To ground a printing head reliably with a reduced number of parts by connecting a deflector made of an electrically conductive material to a chassis in a state capable of conducting, and bringing the ends of the deflector into conductive contact with a carrier shaft. CONSTITUTION:In the case where static electricity is applied to a printing head 2 by the contact of a human body bearing static electricity, the static electricity is discharged to a chassis 9 through a carrier 4, a carrier shaft 5 and a deflector 11. Therefore, the printing head 2 is grounded reliably. Since the carrier shaft 5 and the chassis 9 are so structured as to conduct to each other by utilizing the deflector 11 being a part for pressing levitation of a sheet, the static electricity applied to the printing head 2 can be discharged to the chassis 9 without providing special grounding parts such as a grounding plate. Further, by forming the ends 12L, 12R of the deflector 11 into a tongue piece shape, a contact state of the deflector 11 with the carrier shaft 5 is easily adjusted, whereby conduction between the carrier shaft 5 and the chassis 9 can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer having a deflector.

[0002]

2. Description of the Related Art FIG. 3 shows a schematic structure of a conventional printing apparatus.

In the figure, reference numeral 1 is a stamp, which extends in a direction perpendicular to the plane of the drawing. Reference numeral 2 denotes a print head, which is provided so as to be movable along the print base 1 via a carrier shaft 5 and a carrier 4 arranged in parallel with the print base 1. The print head 2 is connected via a cable 3 to a control device (wiring board) (not shown) that drives and controls the print head 2. The cable 3 is composed of a predetermined number of signal lines and the like. Reference numeral 11 is a deflector, which is a component that serves to suppress the floating of the paper P supplied to the printing plate 1.

The above-mentioned parts are mounted in a predetermined positional relationship on a chassis 9 made of metal via a mounting member (for example, a mounting frame 8 shown in FIG. 4).
Recently, the mounting frame 8 is generally made of synthetic resin in order to reduce the weight, improve the workability and reduce the cost.

By the way, high voltage (for example, 15 kV) static electricity may be applied to the print head 2 due to contact with a human body charged with static electricity.

When such a situation occurs, the print head 2 may malfunction, so that the head 2 is normally grounded by the method described below.

As a method for grounding the print head 2, a cable 3 for controlling the print head 2 is provided with an earth line,
There is a method (power supply ground method) of releasing static electricity applied to the head 2 to the power supply ground.

Further, as shown in FIGS. 4 and 5, the carrier shaft 5 and the chassis 9 are electrically connected by a ground plate 6 and a ground wire 7, and static electricity is discharged from the print head 2 to the carrier 4.
There is a method (chassis ground method) of letting the carrier shaft 5 and the ground plate 6 (ground wire 7) escape to the chassis 9 (the carrier shaft 5 and the chassis 9 are connected to the ground plate 6 as shown in FIG. 6). Bearing 5a without using
And through the metal mounting frame 8 ', etc.,
There is also a method of releasing static electricity from the print head 2 to the chassis 9, but it is almost not used as the adoption of the synthetic resin mounting frame 8 spreads rapidly.

[0009]

By the way, when the above-mentioned power supply ground system is adopted, the ground line is arranged in the vicinity of the signal line of the cable 3 for controlling the print head 2, so that the print head 2 is connected to the ground line. When static electricity flows from the head, an induction current may flow in the signal line, which may hinder the drive control of the head 2.

On the other hand, when the chassis ground method is adopted on the assumption that the synthetic resin mounting frame 8 is used,
The ground plate 6, the ground wire 7, and the screws 18 and the like for attaching the ground plate 6 and the like must be provided, which tends to increase the cost.

In view of the above circumstances, an object of the present invention is to provide a printing apparatus capable of reliably grounding a print head while reducing the number of parts.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a stamp board, a carrier shaft arranged in parallel with the stamp board, a print head supported by the carrier shaft so as to be movable along the stamp board, and the stamp board are provided. The deflector for suppressing the floating of the supplied paper and the conductive chassis for arranging the respective parts such as the stamps at predetermined positions, the deflector is made of a conductive material, and the deflector is It is characterized in that it is electrically conductively connected to the chassis and has its end electrically contacted with the carrier shaft.

[0013]

According to the present invention, the carrier shaft and the chassis are electrically connected to each other by using the deflector of the paper lifting and pressing member. As a result, the static electricity applied to the print head is released to the chassis via the carrier shaft and the deflector.

As described above, since the deflector, which is an essential component of the printing apparatus, is used to conduct electricity without providing a special ground component (for example, a ground plate) between the carrier shaft and the chassis, the number of components is reduced. It is possible to reliably ground the print head while reducing

[0015]

An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the printing apparatus according to the present invention comprises a stamp board 1, a print head 2, a carrier 4, a carrier shaft 5, a chassis 9 and a deflector 11.

Here, the deflector 11 is a component that suppresses the floating of the paper P supplied to the printing plate 1, and is an essential component of the printing apparatus.

The deflector 11 is electrically conductively connected to a conductive chassis 9, and its end portion is electrically conductively contacted with the carrier shaft 5.
In this embodiment, the deflector 11 is made of a thin metal plate having elasticity. Further, the deflector 11 is connected to the chassis 9 using a mounting member 19, and the left and right end portions 12L and 12R in FIG. 2 are made to contact the carrier shaft 5 with a predetermined pressure contact force by utilizing elasticity. Has been done. Each end 12L, 1 of the deflector 11
The 2R has a tongue shape so that the contact state with the carrier shaft 5 can be easily adjusted. As described above, the carrier shaft 5 and the chassis 9 are electrically connected to each other via the deflector 11 which is a paper floating pressing component.

The components such as the carrier shaft 5 are attached to the chassis 9 via an attachment frame (not shown) made of synthetic resin. Further, in this embodiment, the carrier 4 is supposed to have conductivity.

Next, the operation will be described.

When static electricity is applied to the print head 2 by contact with a human body charged with static electricity, the static electricity is released to the chassis 9 through the carrier 4, the carrier shaft 2 and the deflector 11. Therefore, the print head 2 is reliably grounded.

According to this embodiment, however, the carrier shaft 5 and the chassis 9 are electrically connected to each other by utilizing the deflector 11 which is a sheet lifting and holding component, so that the grounding plate (6) or the like is grounded in an exceptional manner. The static electricity applied to the print head 2 can be released to the chassis 9 without providing any parts. As a result, it is possible to reliably ground the print head 2 while reducing the number of parts.

Further, each end portion 12L of the deflector 11 is
12R has a tongue shape, so the carrier shaft 5
It is possible to easily adjust the contact state with the shaft 5 and the chassis 9 so as to be surely conducted. Therefore,
Also from this point, the print head 5 can be surely grounded.

In the above embodiment, the deflector 11
Although it is made of metal, it may be made of a non-metallic material having elasticity and conductivity.

[0025]

According to the present invention, since the carrier shaft and the chassis are electrically connected to each other by using the deflector which is a sheet lifting and holding component, static electricity is not generated from the print head without providing a special ground component. It can be released to the chassis via a deflector or the like. Therefore, the print head can be reliably grounded while reducing the number of parts.

[0026]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

[0027]

FIG. 2 is a diagram for explaining a contact relationship between a deflector and a carrier shaft according to an embodiment.

[0028]

FIG. 3 is a diagram for explaining a schematic configuration of a conventional printing device.

[0029]

FIG. 4 is a diagram for explaining an example of a conventional print head grounding method.

[0030]

FIG. 5 is a diagram for explaining another example of the conventional grounding system of the print head.

[0031]

FIG. 6 is a diagram for explaining still another example of the conventional grounding system of the print head.

[0032]

[Explanation of symbols]

 1 Print Stand 2 Print Head 5 Carrier Shaft 9 Chassis 11 Deflector 12L End 12R End

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[Procedure amendment]

[Submission date] October 12, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

[0025]

According to the present invention, since the deflector, which is a sheet lifting and holding component, is used to electrically connect the carrier shaft and the chassis, static electricity from the print head is removed from the print head without providing a special ground component. It can be released to the chassis via a deflector or the like. Therefore, the print head can be reliably grounded while reducing the number of parts.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a diagram for explaining a contact relationship between a deflector and a carrier shaft according to an embodiment.

FIG. 3 is a diagram for explaining a schematic configuration of a conventional printing device.

FIG. 4 is a diagram for explaining an example of a conventional print head grounding method.

FIG. 5 is a diagram for explaining another example of the conventional grounding system of the print head.

FIG. 6 is a diagram for explaining still another example of the conventional grounding system of the print head.

[Explanation of reference symbols] 1 printing plate 2 print head 5 carrier shaft 9 chassis 11 deflector 12L end 12R end

Claims (1)

[Claims] 1. A stamp, a carrier shaft arranged in parallel to the stamp, a print head movably supported by the carrier shaft along the stamp, and a lifting of a sheet supplied to the stamp. A deflector,
And a conductive chassis for arranging each part such as a stamp board at a predetermined position, the deflector is formed of a conductive material, and the deflector is conductively connected to the chassis and its end is formed. A printing device, wherein a portion is brought into conductive contact with the carrier shaft.