JPS5829691A - Cooling fan - Google Patents

Abstract

PURPOSE:To effectively cool a moving printing head by a method in which a pinion engaging with a rack provided to a guide for a mover is provided to the mover and the pinion is turned and a cooling fan is turned with the movement of the mover. CONSTITUTION:A rack 7 is attached to a guide 6 to guide the movement of a mover 3 and engaged with a pinion 8 provided to the mover 3. When a feed motor 5 turns, and the mover 3 is moved through a feed screw 4 in the direction of printing, the pinion 8 is turned. The rotation of the pinion 8 is accelerated by gear rows 9a and 9b, whereby a cooling fan 10 is turned at high speed. Thus, the heat produced by the printing head 2 moving in a wire dot matrix type printer or the like can be effectively dissipated to cool the head 2.

Description

[Detailed description of the invention] A great invention relates to a cooling fan.

Printers using wire dot matrix print heads are widely used, such as the Kana-Kanji conversion type Japanese typewriter manufactured by the Denmizu Language Processing System.

To this wire dot matrix printing.

The head is equipped with 24 wires arranged in the same horizontal direction, for example in a staggered pattern, and an electromagnet that can selectively drive each wire. Driving down the electromagnets at intervals of ζ 24 times will result in 24X24
dots@-7 trixes are formed, and various characters are formed by selectively driving electromagnets.

Increasing the printing speed is an important issue in such printers, and since the electromagnet is driven with a large current, a large amount of heat is generated in the print head. If this heat is left as it is, it will deform the wire and degrade printing quality, which will have undesirable effects on various parts. For this reason, a cooling fan is used to forcefully dissipate the air.

However, since the print head moves at high speed and frequently, it is difficult to connect electric wires to the print head to supply power, making it impossible to directly provide a cooling fan to the print head.

For this reason, conventional wire-dot 7-trix printers (in this case, a cooling fan is installed on the side plate of the housing near the moving end of the print head and the print head is cooled from a distance). For this reason, the air blowing efficiency is extremely low, and a cooling fan with a relatively large capacity must be used, which causes indoor noise.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to efficiently cool a moving print head of a wire dot matrix printer or the like.

Therefore, in the present invention, a rack is provided on the guide of the movable body, a binion that meshes with the rack is provided on the movable body, and the binion is rotated by the movement of the movable body, thereby operating the cooling fan. It is designed to rotate.

Next, the gist of the present invention can be specifically explained with reference to embodiments shown in the drawings.

In the figure, 1 is a platen, 2 is a printing/rad, 3 is a moving body provided with a print head 27il, and 4 is a moving body 3.
A feed screw that feeds the print direction (left and right in the figure)
5 is a feed motor that rotates the feed screw 4; 6 is a moving body 3;
7 is a rack provided on the guide 6, 8 is a binion provided on the movable body 3, 9a and 9b are gear trains that increase the rotation speed of the binion 8, and lO is a cooling provided on the movable body 3. I'm a fan.

When the feed morph 5 rotates and the movable body 3 moves in the printing direction via the speed screw 4 at l++, 'y, and i on the 8 is rotated 5 times in order to move in alignment with the bent rack 7. The rotation of the pinion 8 is caused by the gear train 9a and 91) (thus, the speed increase is 1. cooling fan 1
Rotate 0 at high speed.

The cooling fan 10 is provided with 31 movable bodies and moves down together with the movable body 31. For this reason, it is possible to provide the print head 2 in close proximity to the print can 8.
This makes it difficult to efficiently dissipate and cool the heat generated.

In addition, the moving body 3 and the printing/gutter 2 move down. - When the print/\/rad 2 is not printing, the cooling fan 10 is stopped, so it does not rotate unnecessarily and therefore does not generate noise.

Notenjo explained. According to the present invention, the dots can be efficiently used as coolers for movable printing in wire dot matrix printers and the like.

[Brief explanation of the drawing]

The figure is an explanatory diagram of an embodiment of the present invention, and in the figure, 2 is a print head, 3 is a moving body, 4 is a feed screw, 6 is a guide, 7 is a rank, 8 is a pinion, and 10 is a cooling fan. 4-

Claims (1)

[Scope of Claims] 1. A hand pinion, a rack provided on a guide of the moving body and meshing with the pinion, and a rack provided on the moving body for rotation of the pinion (thereby rotating the pinion). A cooling fan that rotates downward as a moving object moves.