JPH0324984A - Carrier unit cover - Google Patents

Abstract

PURPOSE:To enable a low noise printer to be realized by a method wherein a carrier unit cover in which a component having sound absorption and damping operation is composed of a plurality of different components is provided to the printer. CONSTITUTION:A carrier unit cover 4 is composed of a plurality of components 5, 4, and low noise and damping effect are made capable of being expected. That is, the component is made of ferrite having high damping effect and the damping component 4 is made of foaming urethane rubber sound absorption material having high sound absorption effect. Noise is generally composed of a sound to be emitted from a printing head 1 body, a sound of striking printing paper in printing paper in printing, a sound by vibration of a carrier unit system, etc. Then, by covering a carrier unit 3 being a generation source of printing sound with this carrier unit cover 4, a part of the sound to be emitted from the printing head 1 body or sound to be generated from the carrier unit itself and the sound by the printing paper can be held down.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to printers, and more particularly to components used in printing devices.

[Conventional technology]

The prior art will be explained with reference to FIG.

Figure @5 shows the schematic structure of a serial dot matrix printer as an example. The printing mechanism of the serial dot matrix printer is well known and will therefore be omitted. Normally, the print head 1 and the ink ribbon cartridge 2 are mounted on a carrier 3 and have the structure shown in FIG. As is well known, in impact type printers, when the wire of the print head 1 performs printing via the ink ribbon, a very high-pitched sound is generated.

Hereinafter, this sound will be referred to as if. Conventionally, in this type of printer, the sound shielding level is extremely high, which should be the biggest drawback for users. Various countermeasures against this problem have been considered. First, a cover with a soundproofing effect was installed separately from the grille/tar, a soundproofing cover was added to the print head 1 as shown in FIG. 7, and the printing duty was reduced.

[Problem to be solved by the invention]

Soundproof covers are quite large and expensive,
Each type has its own drawbacks, such as the printing head cover alone cannot be expected to reduce noise sufficiently, and reducing the printing duty requires too much time for business processing. Under the above circumstances, there is a strong desire to develop new tools for reducing noise, and there is also a demand for the development of low-cost steel materials that can be used in small, low-cost printers and have a large noise-reducing effect. It had been.

[Means to solve the problem]

According to the present invention, the carrier unit portion on which the printing mechanism and ink ribbon cartridge of the printer are mounted is covered from above, and has a scrap shape and is a structural member that simultaneously covers the printing mechanism and the ink ribbon cartridge. The present invention relates to a carrier unit cover having a sound absorption and vibration distribution function, and the carrier unit cover is obtained in which the structural member is composed of a plurality of different types of members.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the carrier unit cover of the present invention. Further, in FIG. 2, the carrier unit cover 4 has a box-like shape as shown, and is adapted to be placed over the carrier unit from above. In addition, the material is made of a material with high sound absorption and vibration damping effects. For example, a composite resin containing ferrite, rubber with a vibration absorbing effect, or metal containing lead or the like may be used. Although not shown, the carrier unit cover 4 is held 8! after being attached to the carrier unit 3! ! Structure? ) 5M is determined.

In general, noise is composed of sounds emitted from the main body of the print head 1, sounds of hitting printing paper during printing, sounds caused by vibrations of the carrier unit system, and the like. This carrier unit cover covers part of the sound generated by the tuning fork carrier unit itself and the printing paper that comes out from the print head 1 body by covering the carrier unit 4 which is the source of printing sound as shown in Figure 6. It has the effect of suppressing Furthermore, the effect can be increased by combining it with a conventional device cover of the printer main body. Further, this carrier unit cover 4 can be easily processed into a certain shape and can be made at a very low cost.

By providing a printer with the carrier unit cover 4 having the above-described effects, a low-noise printer can be easily realized at low cost. Further, in the present invention, the structure of the carrier unit cover 4 is made up of a plurality of members, so that it is expected that the carrier unit cover 4 will have a much lower noise and distribution effect. An example of the carrier unit cover with the two-layer structure shown in FIG. 4 is shown. The member 5 is a ferrite vibration damping material with a high vibration distribution effect. The member 4 is a foamed urethane rubber based member with a high sound absorption effect. This example can also be expected to produce the same effects as described above.

〔Effect of the invention〕

As explained above, the present invention provides a carrier unit cover for a printer, which is made of a material with high sound absorption and vibration damping effect, and has the effect of realizing a printer with very low noise. be.

FIG. 4 is a sectional view of another embodiment of the present invention, and FIGS. 5 to 7 are views showing a conventional example.

Claims (1)

[Claims] A carrier unit cover having a shape that is placed over a carrier unit section on which a printing mechanism and an ink ribbon cartridge of a printer are mounted from above to cover and hide the printing mechanism and the ink ribbon cartridge at the same time, and whose constituent members have sound absorbing and vibration damping functions. A carrier unit cover characterized in that the constituent members are composed of a plurality of different types of members.