JPH0316766A - Soundproof platen - Google Patents

Abstract

PURPOSE:To eliminate resonance or noise generated by an impact vibration resulting from the printing operation of a printer by filling the hollow cylinder of a metal cylindrical body of a platen with glass wool containing activated charcoal and sealing both ends tightly with a flange. CONSTITUTION:The hollow cylinder of a metal cylindrical body 3 is filled with glass wool containing activated charcoal having a vibration absorption damping effect, and becomes airtight with flanges 4, 5 installed. If a platen installed on an impact printer operates, a printing section performs printing process under pressure on the surface of the platen, and a noise of impact vibration is transmitted to the metal cylinder of the platen to cause resonance in the metal cylinder. Consequently, the resonance is damped by glass wool containing activated charcoal provided in the metal cylinder and thus noise resulting from the resonance is reduced.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a platen mechanism used in a printer.

[Conventional technology]

Conventionally, the platen used in this type of impact printer has a base metal rod (shaft) with a slightly hard rubber molded onto the surface. Therefore, the printing section of the printer prints characters, images, etc. onto the surface of the platen.
It is printed under pressure using an ink ribbon or the like and visualized.

[Problem to be solved by the invention]

During this printing operation, the printer generates a harsh impact sound. This impact sound is transmitted to the metal body inside the platen and resonates within the metal body. Together with the impact sound, these are emitted as unpleasant sounds around the printing area.

Due to the growth of office automation, personal computers, etc., printers are being connected to a large number of devices, so there is a strong demand for lower noise, smaller size, lighter weight, lower cost, etc. In particular, with regard to noise, which is a problem, conventional methods of pasting soundproofing material on the inner surface of the exterior (housing) can reduce the size of the problem. This conflicts with weight reduction, cost reduction, etc. In addition, the environment in which printers are used has changed from the traditional machine room to general offices and homes, and printing noise, which was not a problem in the past, is now perceived as noise, and many complaints about this have started to occur. .

[Means to solve the problem]

The present invention solves the above-mentioned drawbacks by making the metal body of the platen into a hollow cylinder and filling it with glass wool containing activated carbon.By damping the printing impact vibration of the platen, impact noise can be reduced. Provide platen.

[Effect]

When the metal rod that is the base material of the platen is subjected to impact vibration from the outside, the impact sound resonates and is likely to resonate. This metal rod is made into a hollow cylinder, and by filling the inside with activated carbon and glass wool and integrating it, it absorbs internal resonance and prevents resonance.

〔Example〕

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

FIG. 1 shows a cross-sectional view of a platen according to one embodiment of the invention. In this embodiment, the hollow cylinder of the metal cylinder 3 is filled with glass wool 6 containing activated carbon, which has a vibration absorbing (damping) effect, and a flange 4.5 is attached to form a sealed structure.

During operation, the platen attached to the impact printer
Pressurized printing operation of the printing section is performed on the surface of the platen, and at this time, the impact vibration sound is transmitted to the metal cylinder of the platen, causing the metal cylinder to resonate, but due to the glass wool containing activated carbon filled in the metal cylinder, Vibration is suppressed and noise caused by resonance etc. can be reduced.

Moreover, it is more effective in improving the influence of fine vibrations on the surface of the platen on the print quality (blurring and blurring of characters) than by the impact vibrations generated by continuous printing operations.

〔Effect of the invention〕

As explained above, the present invention fills the hollow cylinder of the metal cylinder of the platen with activated carbon-containing glass wool, and seals and fixes both ends with flanges, thereby eliminating resonance caused by shock vibrations generated during printing operations of the printer, etc. It has the effect of reducing noise.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a platen according to an embodiment of the present invention.

Claims (1)

[Claims] A soundproof platen used in printers, which is characterized by having a hollow metal cylinder filled with glass wool containing activated carbon.