JPS61114877A - Impact-type serial printer - Google Patents

Abstract

PURPOSE:To prevent impact sounds from leaking to the exterior and enable heat to be released after printing, by providing doors for closing vent holes when a printing head is moved. CONSTITUTION:When the printing head 9 is moved in a moving range (a) during printing, the movement is not transmitted to a power-transmitting lever 8, and the doors 2, 3 remains closing the vent holes to maintain a casing 1 in a hermetically sealed state, so that the impact sounds generated by the head 9 do not leak out to the exterior. In the cases where cooling is required because the head 9 or a circuit element reaches a high temperature or where printing data are not supplied, the head 9 is moved to the left beyond the printing ranage (a), whereby the lever 8 is pressed, and the force is transmitted through wires 4, 5, 6, 7 to open the doors 2, 3, and ventilation of the casing 1 is conducted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an impact type serial printer, particularly an impact type serial printer with a modified frame structure〇 [Prior Art] Conventionally, this type of impact type serial printer Printers require heat dissipation because the circuit elements in the print head drive circuit, motor drive circuit, and power supply circuit generate heat.
Therefore, it was necessary to provide ventilation holes and ventilation fans in the frame that covered and housed these items.

[Problems to be solved]

In the conventional impact type serial printer mentioned above,
It is necessary to provide ventilation holes for heat dissipation from circuit elements and other ventilation holes in the frame that encloses the print head, etc., and since the frame cannot be kept in an airtight state, the above-mentioned ventilation holes are There is a problem in that the impact sound of the print head is distorted, and a solution to this problem has been desired.

The idea is to keep the cluster in a sealed state so that the impact sound of the print head does not leak out.As a solution to this problem, a ventilation hole is provided in the frame that covers the print head, etc., and when the print head moves through the ventilation hole. It is an object of the present invention to provide an impact type serial printer which is provided with a door that seals the ventilation hole.

〔Example〕

First, regarding one embodiment of the present invention'! This will be explained with reference to Figure a1 and Figure 2.

Referring to FIG. 1, this impact type serial printer has a frame structure, ventilation holes 10.11. JI2゜3, wires for opening and closing the door 4, 5, 6, 7. It includes a print head 9 and a power transmission lever 8 for movement of the print head 9. This figure is during printing, and if the movement range of the print head 9 is a, the movement of the print head 9 is controlled by the power transmission lever 8.
Since the ventilation holes 10, 11, 7, 2 and 3 remain closed and the frame l is kept in a sealed state, the impact sound of the print head 9 is prevented from leaking outside.

FIG. 2 shows the ventilation hole 10.11 opened. When the print head 9 or circuit elements become hot and need to be cooled, or when the next print data is not sent, the power transmission lever 8 is moved when the print head 9 is moved to the left of the print box flJa. is pushed, the force is transmitted through wires 4.5 and 6.7, and 712 of ventilation hole 10.11
, 3 are opened to ventilate the frame 11. By adopting such a structure, ventilation can be performed in the non-circular space without requiring special power to open and close the door 2.3 of the ventilation hole 10.11. [Effect of the invention] Book As explained above, the invention provides a ventilation hole in the frame of an impact type serial printer, and a door that seals the ventilation hole when the print head moves into the ventilation hole. Inside, the frame is sealed to prevent the impact sound of the print head from leaking outside, providing reliable sound insulation, and also allowing heat to be dissipated after printing.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a printing state of an impact type serial printer according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a state after printing.

Claims (1)

[Claims] An impact type serial printer is provided with a ventilation hole in a frame covering a print head, etc., and a door that seals the ventilation hole when the print head moves into the ventilation hole.