JP2008213353A - Information equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide information equipment which eliminates a gap bringing between a supporting leg and a mounting surface by the shape of the mounting surface, and prevents resonance with vibration caused during printing in a printing section. <P>SOLUTION: The impact dot printer 10 has a printing section performing printing while moving forward and backward a carriage equipped with a print head; a base plate 50 facing the mounting surface in one side and restrainingly stopping the printing section in the other surface; at least two hard supporting legs 60A and 60B attached to one surface and undeformably butting against the mounting surface, at least two soft supporting legs 55A and 55B attached to one side farther than the hard supporting legs 60A and 60B from the printing section and deforming to such an extent that the deformation does not exceed the limit of elastic deformation and contacting the mounting surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information device such as a printing apparatus.

  Impact dot printers and inkjet printers, which are printing apparatuses, have a printer head mounted on a reciprocating carriage, and perform printing for each line in accordance with the reciprocating movement of the carriage. Since such a printer is normally used by being placed on a flat surface, as shown in Patent Document 1 below, the four support legs that come into contact with the surface to be placed are each made of the same material such as rubber. Hard elastic body is adopted.

JP-A-7-314729

  However, if the surface on which the printer is placed is distorted or has a rough surface property, a gap occurs between the support leg and the placement surface. An unpleasant sound was generated each time the support legs contacted the mounting surface. Further, when soft rubber is adopted for the four support legs in order to eliminate the gap, there is a problem of resonance with vibration in a low frequency band due to the reciprocating movement of the carriage.

  In order to solve the above-described problems, an information device according to the present invention is an information device that is placed on the placement surface by contacting a plurality of support legs with the placement surface, and includes a print head. The printing portion that prints while reciprocating the carriage, one surface is opposed to the mounting surface, the other surface is attached to the rigid plate that holds the printing portion, and the one surface, At least two first support legs that are in non-deformable contact with the mounting surface, and a range in which the distance from the printing unit is attached to the one surface farther than the first support legs and does not exceed the limit of elastic deformation An information device comprising: at least two second support legs that are deformed in contact with the placement surface.

  According to the present invention, when the information device is placed on the placement surface, the second support leg is deformed in a range not exceeding the limit of elastic deformation and comes into contact with the placement surface. The gap generated between each support leg and the mounting surface due to the distortion is eliminated by further elastically deforming and contacting the second support leg. Further, the first support leg and the second support leg are attached to the rigid plate, and the first support leg is in contact with the placement surface in a non-deformable manner and is farther from the printing unit than the first support leg. Since the second support leg is elastically deformed and comes into contact with the mounting surface, resonance due to vibration generated when printing is performed in the printing unit can be prevented as compared with the case where all the support legs are elastically deformed and come into contact. it can.

In the information device of the present invention, the first support leg is in contact with the mounting surface at a predetermined height from the one surface, and the second support leg is substantially the same height as the predetermined height. It is preferable to be elastically deformed and contact the mounting surface.
According to the present invention, the rigid plate can be placed substantially parallel to the placement ground.

In the information apparatus of the present invention, the first support leg may be attached in the vicinity of a position facing away from the printing unit with the rigid plate interposed therebetween. The first support leg and the second support leg may be attached along a direction in which the carriage reciprocates.
In the information device of the present invention, the second support leg may include an elastic member having a certain hardness and having a constant contact surface area in contact with the placement surface. The leg may include a rigid member that is in contact with the placement surface and is not deformed.
Preferably, the above-described information device includes a printer, so that a printer that has substantially the same effect as the above-described information device can be enjoyed.

  Hereinafter, an embodiment of the present invention will be described using an impact dot printer as an example of information equipment.

(Embodiment)
FIG. 1 is a perspective view showing an outline of the structure of the impact dot printer 10, and FIG. 2 is a plan view of the impact dot printer 10. In the impact dot printer 10, a printing unit such as a guide shaft 30, a ball screw 15, a rotation driving unit 40, a paper feed roller shaft 35, and a platen (not shown) is assembled on the front side of the perspective view on the printer base 45. A paper feed tractor (not shown) is assembled on the rear side of the perspective view on the printer base 45.

  The carriage 20 is mounted with a printer head 25 and is held by a guide portion that includes a guide shaft 30 and a ball screw 15. The rotation drive unit 40 includes a drive motor (not shown). When the rotation of the drive motor is transmitted to the guide unit, the ball screw 15 rotates and the carriage 20 reciprocates. Further, the paper feed roller shaft 35 moves the roll paper 100 guided by a paper guide (not shown) in accordance with the rotation of the drive motor in one direction from the insertion direction (A) on the back of the impact dot printer 10. Send in front discharge direction (B). At this time, printing is performed on the roll paper 100 by hitting the ink ribbon with a predetermined wire pin built in the printer head 25 in accordance with a signal input to the impact dot printer 10. Such an impact dot printer 10 is mounted and used on a substantially flat table. The detailed contents of the impact dot printer 10 are not the gist of the present invention, and are therefore omitted (see, for example, JP-A-2001-287384).

  FIG. 3 is a bottom view of the impact dot printer 10. A base plate 50 of the printer base 45 is exposed on the bottom surface of the impact dot printer 10. The base plate 50 has rigidity that does not deform due to the weight of the impact dot printer 10 even when the mounting surface is distorted. Further, on the base plate 50, rigid support legs 60A and 60B are respectively attached to the front side of the impact dot printer 10, that is, the end close to the carriage 20, and are attached to the back side of the impact dot printer 10. The flexible support legs 55A and 55B are attached to the end on the side far from the carriage 20, respectively. The rigid support legs 60A and 60B and the flexible support legs 55A and 55B are attached in directions parallel to the direction in which the carriage 20 reciprocates. In the present embodiment, the support legs attached to the base plate 50 are not limited to the four rigid support legs 60A and 60B and the flexible support legs 55A and 55B. The rigid support legs 60A and 60B and the flexible support legs There may be two or more of at least one of the support legs 55A and 55B. Further, the attachment positions of the rigid support legs 60A and 60B and the flexible support legs 55A and 55B are not limited to the direction parallel to the direction in which the carriage 20 reciprocates.

  4A is a side view showing one rigid support leg 60A and one flexible support leg 55A attached to the base plate 50, and FIG. 4B is one rigid support leg 60A and one flexible support leg. It is a top view of leg 55A. The rigid support leg 60A has a certain height (T2) from the placement surface, has a diameter L on the side in contact with the placement surface of about 25 mm, and is screwed to the base plate 50. Further, since the hard support leg 60A is made of hard rubber having a JIS A hardness of about 80 degrees, the impact dot printer 10 is loaded, that is, the load of the impact dot printer 10 is applied to the hard support leg 60A. Since it is not deformed even in the state, the height (T2) from the placement surface to the contact surface of the rigid support leg 60A is kept substantially constant.

The flexible support leg 55A has a rectangular parallelepiped shape, and has a long side (B) and a short side (A) where the area of the contact surface in contact with the mounting surface is about 14.5 cm ^2. It is glued. The soft support leg 55A is made of soft rubber having an Asker A hardness of about 5 to 10 degrees. When the impact dot printer 10 is in a non-mounting state, the soft supporting leg 55A has a certain height (T1) from the mounting surface. When the impact dot printer 10 in operation is placed on a placement surface with no difference in height, the impact dot printer 10 is designed to be substantially the same as the height (T2) of the rigid support leg 60A due to the load of the impact dot printer 10. Yes. Further, the soft support leg 55A can be elastically deformed to a predetermined height (T3) lower than the height (T2) of the hard support leg 60A. In the present embodiment, the flexible support leg 55A has a distortion allowance (T1-T2) of about 3 mm in a mounted and non-operating state, and further has a distortion allowance (T2-T3) of approximately 4 mm. The hard support legs 60A and 60B and the soft support legs 55A and 55B are not limited to the above-described modes and materials. In addition, the height (T1) of the flexible support leg 55A when the impact dot printer 10 is not placed is substantially the same as the height (T2) of the rigid support leg 60A. The impact dot printer 10 may be designed to be stable at a height distorted from the height (T2) of the leg 60A.

  FIGS. 5A to 5D are diagrams showing the amount of strain that the flexible support legs 55A and 55B are deformed when there is a height difference on the placement surface. In these drawings, the height (T2) of the rigid support leg 60A is set as the reference (0). First, in Fig.5 (a), the mounting ground which one hard support leg 60A touches is rising 3 mm. In this case, the impact dot printer 10 is stabilized when one soft support leg 55A is distorted by 1 mm and the other soft support leg 55B is distorted by 5 mm. Moreover, in FIG.5 (b), the mounting ground which one soft support leg 55A touches is rising 3 mm. In this case, the impact dot printer 10 is stabilized because the one soft support leg 55A is distorted by 5 mm and the other soft support leg 55B is distorted by 1 mm. Further, in FIG. 5C, the ground level on which one hard support leg 60A is in contact with the ground level on which one soft support leg 55A is in contact is raised by 3 mm. In this case, the impact dot printer 10 is stabilized because the one soft support leg 55A and the other soft support leg 55B are each distorted by about 3 mm. Furthermore, in FIG.5 (d), the mounting ground which the other rigid support leg 60B touches has settled 3 millimeters. In this case, the impact dot printer 10 is stabilized because one soft support leg 55A is distorted by 1 mm and the other soft support leg 55B is distorted by 5 mm.

  As described above, even when the impact dot printer 10 is placed on a placement surface having a height difference of about 3 mm, the soft support legs 55A and 55B are distorted within the range of elastic deformation, so that the impact dot printer 10 is in a stable state. Placed. Further, when printing data is sent to the impact dot printer 10 and printing is performed, low frequency vibration is generated by the carriage 20 carrying the printer head 25 reciprocating, and the generated low frequency vibration is a rigid body. It propagates through the base plate 50 and reaches the flexible support legs 55 </ b> A and 55 </ b> B disposed away from the carriage 20 at the end of the base plate 50. Here, since the flexible support legs 55A and 55B have a margin for the distortion of the soft rubber, they function as a kind of dynamic vibration absorber and suppress resonance by suppressing low-frequency vibration.

As mentioned above, although this invention was demonstrated based on embodiment shown in figure, this invention is not limited to this embodiment, The modification as described below can also be assumed.
(1) The information device of the present invention is not limited to the impact dot printer 10, but can also be applied to an ink jet printer, and further, media processing incorporating a printing apparatus for printing on various storage media. It can also be applied to devices.

1 is a perspective view showing a schematic structure of an impact dot printer according to an embodiment of the present invention. 1 is a plan view of an impact dot printer according to an embodiment of the present invention. 1 is a bottom view of an impact dot printer according to an embodiment of the present invention. (A) is a side view which shows the hard support leg and soft support leg which were attached to the base board, (b) is a top view of a hard support leg and a soft support leg. (A)-(d) is a figure which shows the distortion amount which a flexible support leg deform | transforms when there exists a height difference in a mounting surface.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Impact dot printer, 15 ... Ball screw, 20 ... Carriage, 25 ... Printer head, 30 ... Guide shaft, 35 ... Paper feed roller shaft, 40 ... Rotation drive part, 45 ... Printer base, 50 ... Base board, 55A, 55B ... soft support legs, 60A, 60B ... hard support legs, 100 ... roll paper.

Claims (7)

A plurality of support legs are in contact with the placement surface, respectively, and are information devices placed on the placement surface,
A printing section for printing while reciprocating a carriage mounted with a print head;
One surface is opposed to the mounting surface, and the other surface is a rigid plate that holds the printing portion;
At least two first support legs attached to the one surface and in non-deformable contact with the mounting surface;
At least two second support legs that are attached to the one surface that is farther than the first support legs than the first support legs, and that are deformed within a range that does not exceed the limit of elastic deformation and that contact the mounting surface. An information device comprising: The information device according to claim 1,
The first support leg is in contact with the mounting surface at a predetermined height from the one surface,
The information device according to claim 1, wherein the second support leg is elastically deformed to substantially the same height as the predetermined height and contacts the mounting surface. The information device according to claim 1,
The first support leg is
An information device, wherein the information device is attached in the vicinity of a position facing away from the printing unit across the rigid plate. In the information equipment according to any one of claims 1 to 3,
The first support leg and the second support leg are:
An information device, wherein each of the carriages is attached along a direction in which the carriage reciprocates. The information device according to any one of claims 1 to 4,
The information device, wherein the second support leg includes an elastic member having a certain hardness and having a constant contact surface area in contact with the mounting surface. The information device according to any one of claims 1 to 5,
The information device according to claim 1, wherein the first support leg includes a rigid member that is in non-deformation contact with the placement surface.   The information device according to claim 1, wherein the information device includes a printer.

Images