JP2001113782A - Printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing apparatus which can reduce costs by being earthed from a substrate without using special parts, can be earthed at all times in a surely stable state via a shaft to the ground thereby effectively coping with a static electricity, and can prevent a break of electronic parts on the substrate and malfunction of a printer by the static electricity when an ink cartridge is replaced. SOLUTION: The printing apparatus is earthed from a substrate 4 disposed inside an ink cartridge holder 2. A pattern 5 is formed to an edge part of the substrate 4. The pattern 5 at the edge part of the substrate 4 is kept in contact with surfaces of bearings 6 and 6 used for movably holding the ink cartridge holder 2 to a shaft 3 suspended to an apparatus body, so that the apparatus is earthed through the shaft via the bearings 6 and 6 from the substrate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus in which a ground is dropped from a substrate provided inside an ink cartridge holder.

[0002]

2. Description of the Related Art Conventionally, as a structure for dropping ground from a substrate in a printing apparatus of this type, for example, a shield plate is attached to a place where there is a gap between ink cartridges and a printer is passed through a flexible flat cable from the substrate through the shield plate. The ground was dropped on the main body. However, in this case, another component called a shield plate is required, and the ground is dropped to the print main body side through the flexible flat cable, so that there is a problem that it is unstable.

[0003] Japanese Patent Application Laid-Open No. Hei 6-143555 discloses an ink jet recording apparatus. This is because, as shown in FIGS.
103 capable of reciprocating a cartridge including a cartridge
When the carriage 103 moves to the cartridge replacement position, the opening / closing member such as the carriage 103 or the head cover 110 is connected to the ground member 117.
Through the electric ground member 101. However, in this case, the ground is reduced only when the carriage 103 is moved to the cartridge replacement position, so that there is a problem that the ground is not always reduced.

In Japanese Utility Model Laid-Open No. 5-29766,
A printing device is described. This is shown in FIGS.
As shown in (c), a resin carriage 201 on which a print head 203 is mounted is slidably supported on a metal guide shaft 202 via a metal bush 206 and provided on the print head 203. The tapping screw member 208 screwed into the screw hole 207a and the bush 206 are connected by a coil spring 209, and the guide shaft 202 and the print head 203 are electrically short-circuited. However, in this case, there is a problem that the structure is complicated, the assembling work is difficult, and the ground is dropped by electrically short-circuiting through the coil spring 209.

Further, Japanese Utility Model Laid-Open No. 5-74850 discloses that
A static eliminator for a print head is described. This is shown in FIG.
As shown in the figure, a metal felt 309 containing a conductive material is attached to the ground portion 303a of the carriage 303, and the metal felt 309 is attached to the carriage shaft 30.
2 from one side, static electricity generated around the print head (not shown) of the carriage 303 can be satisfactorily discharged to the carriage shaft 302, and even if the carriage 203 slides. No noise is generated, and burn-in can be prevented. However, in this case, since the metal felt 309 is used to lower the ground, there is a problem that the number of parts increases and the cost increases.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and can reduce the cost by using a ground without using special parts, thereby reducing the cost and ensuring a stable state. The ground can be dropped at all times, the ground can be dropped through the shaft to the ground, and effective countermeasures against static electricity can be taken. It is an object of the present invention to provide a printing device capable of preventing malfunction.

[0007]

In order to achieve the above object, according to the present invention, there is provided a printing apparatus in which a ground is dropped from a substrate provided inside an ink cartridge holder. A pattern is formed on the edge of the substrate, and the pattern of the edge of the substrate is brought into contact with the surface of a bearing that movably holds the ink cartridge holder on a shaft erected on the apparatus main body. The earth is dropped through the shaft through the shaft.

According to a second aspect of the present invention, the bearing is provided with a connecting piece projecting toward an edge of the substrate, and this connecting piece is screwed to the edge of the substrate. The substrate is fixed to the bearing, and an edge pattern of the substrate is brought into contact with a surface of the bearing so that ground is dropped from the substrate via the bearing. The invention according to claim 3 is characterized in that the pattern is formed on all peripheral edges of the substrate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a partial front view showing a main part of a printing apparatus according to an embodiment of the present invention,
FIG. 2 is a front view of a substrate in the printing apparatus according to the embodiment.

As shown in FIG. 1, the printing apparatus of the present embodiment has a shaft 3 for moving the ink cartridge holder 2 mounted on a main body (not shown) of the apparatus, and is disposed inside the ink cartridge holder 2. The pattern 5 is formed on the entire outer peripheral edge of the substrate 4 provided. A pair of left and right bearings 6, 6 are disposed on the shaft 3.
Connection pieces 8, 8 for fastening with screws 7, 7 at the edge of substrate 4
, And the pattern 5 on the edge of the substrate 4 is in contact with the surfaces of the bearings 6 and 6. As shown in FIG. 2, rectangular patterns 9, 9 are formed inside the pattern 5 at both corners of the lower edge of the substrate 4, and these patterns 9, 9 are provided with screws 7, 7. Holes 10 and 1 for inserting
0 is formed.

With such a configuration, the shaft 3 is transferred from the substrate 4 via the bearings 6 through the edge pattern 5.
From the ground to the ground of the device body. Therefore, the ground can be dropped from the substrate 4 to the ground of the apparatus main body without using a special component such as a shield plate, so that the cost can be reduced, and the ground can be always dropped in a stable state. In addition, the ground can be dropped to the ground of the apparatus main body via the shaft 3 so that the countermeasures against static electricity can be effectively performed. When the ink cartridge is replaced, the electronic components on the substrate 4 are destroyed by the static electricity and the printer malfunctions. Can be prevented.

Further, since the pattern 5 is formed on the entire outer peripheral edge of the substrate 4, it is possible to ground the electric components disposed at any place of the substrate 4 via this pattern. Needless to say, the pattern 5 may be formed only on the edges of the substrate 4 on the bearings 6 and 6 side at a minimum, and the ground may be dropped from the substrate 4.

[0013]

As described above, according to the first aspect of the present invention, a pattern is formed on the edge of the substrate provided inside the ink cartridge holder, and the shaft is installed over the entire apparatus. The surface of the bearing that movably holds the ink cartridge holder is brought into contact with the pattern of the edge of the board, and the ground is dropped from the board through the shaft through the bearing, so special parts such as shield plates are used. The ground can be dropped from the substrate without using it, and the cost can be reduced. Further, the ground can always be dropped in a stable state. In addition, the ground can be dropped to the ground via the shaft, so that the countermeasures against static electricity can be effectively performed, and the electronic parts on the substrate can be prevented from being damaged by the static electricity and the malfunction of the printer when replacing the ink cartridge. .

According to the second aspect of the present invention, the bearing has a connecting piece projecting toward the edge of the substrate.
By screwing this connection piece to the edge of the board, the board was fixed to the bearing, and the pattern on the edge of the board was brought into contact with the surface of the bearing and the ground was dropped from the board via the bearing. Since the edge of the board is screwed to the connection piece of the bearing, the pattern of the edge of the board can be securely contacted with the surface of the bearing, and the ground from the board via the bearing more reliably The substrate can be dropped, and the substrate can be securely connected to the bearing by screwing, so that the substrate can be in a stable state.

According to the third aspect of the present invention, since the pattern is formed on the entire outer peripheral edge of the substrate, the ground can be dropped from any part of the substrate through the pattern to the electric components. .

[Brief description of the drawings]

FIG. 1 is a partial front view showing a main part of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of a substrate in the printing apparatus according to the embodiment.

FIG. 3 shows a conventional ink jet recording apparatus, and (a)
1 is a perspective view showing the entire structure, and FIG. 1B is a side view thereof.

4A and 4B show a conventional printing apparatus, in which FIG. 4A is a plan view of a carriage on which the printing paper head is mounted, FIG. 4B is a right side view thereof, and FIG.

FIG. 5 is a front view showing a conventional static eliminator for a print head.

[Explanation of symbols]

 2 Ink cartridge holder 3 Shaft 4 Substrate 5 Pattern 6 Bearing 7 Screw 8 Connection piece

Claims (3)

[Claims] 1. A printing apparatus in which a ground is dropped from a substrate provided inside an ink cartridge holder, wherein a pattern is formed on an edge portion of the substrate, and the ink cartridge is mounted on a shaft provided on an apparatus body. A printing apparatus, wherein a pattern of an edge portion of the substrate is brought into contact with a surface of a bearing which movably holds a holder, and ground is dropped from the substrate through the shaft via the bearing. 2. A bearing is provided with a connecting piece protruding toward an edge of the board, and the connecting piece is screwed to an edge of the board to fix the board to the bearing. 2. The printing apparatus according to claim 1, wherein the pattern of the edge of the substrate is brought into contact with the surface of the bearing, and the ground is dropped from the substrate via the bearing. 3. The printing apparatus according to claim 1, wherein the pattern is formed on all outer peripheral edges of the substrate.