JPS5971880A - Dot printer head - Google Patents

Abstract

PURPOSE:To obtain the titled printer head which can form a case at a low cost with a higher heat radiation property by arranging a plurality of metal plates fixed in lamination so that a magnetic circuit part is housed to form a radiation fin with sides thereof made uneven. CONSTITUTION:A plurality of metal plates 14 are laminated integral with pins by varying the vertical and lateral ways thereof so that the sides thereof becomes uneven to form a case 12 to be mounted on a guide frame 11 with a screw 13. A housing section 17 is defined with holes 16 separately made through the metal plates to house a magnetic circuit part for operating a needle 10. This improves the air draft between radiation fins to enhance the radiation effect. In this manner, as the case 12 having radiation fins is formed by fixing a plurality of aluminum plates 14 made by pressing with sides thereof uneven thereby enabling an inexpensive formation thereof without use of a costly casting mold.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a dot printer head.

[Technical background of the invention]

Conventionally, a magnetic circuit component that operates a needle has a considerably large current flowing intermittently and frequently, resulting in high resistance loss and high frequency loss in the coil, resulting in high heat generation. The heat generated by the magnetic circuit components has an adverse effect on the performance of dot printers, but the heat generation has recently been exacerbated by the demand for higher speeds. Therefore, as shown in Fig. 1, a heat dissipation fin (
4) are die-cast together to form a case (3).
) has a larger surface area to improve heat dissipation.

[Problems with back moon technology]

However, in such a case, the mold for the case (3) is expensive, and the dimensional accuracy is low, so cutting is required later, and the radiation fins (4) are perpendicular to the platen. It has poor ventilation and poor heat dissipation.

[Purpose of the invention]

The present invention has been made in view of these points, and it is an object of the present invention to provide a dot printer head that can form a case very easily and inexpensively and has good heat dissipation.

[Summary of the Invention] This invention provides a case in which a plurality of metal plates are fixed in a stacked state, and a magnetic circuit is provided in which a storage portion is formed by holes formed in each of the metal plates, and a needle is actuated in the storage portion. The parts are stored, the sides of each metal and plate are made irregular, and a plurality of heat dissipation fins are formed parallel to the platen, thereby improving the passage of air between the heat dissipation fins and increasing the heat dissipation effect. The case is constructed so that it can be formed inexpensively and hung without using an expensive casting mold.

[Embodiments of the invention]

An embodiment of the present invention will be explained based on FIGS. 2 and 3. A guide frame 01) for aligning and slidably holding a plurality of needles is provided. The case α2 is attached to the guide frame αυ by screws (+J).This case 02QJ-1 has a rectangular shape and is made of multiple aluminum plates Q formed by press working.
41, that is, one metal plate 1i so that the sides are uneven.
Next, change the direction of the vertical stacking and place the pins on top of each other.
The hole αO formed in the aluminum plate ← is connected to a storage part α5 in which a magnetic circuit component (not shown) for operating the needle (10) is stored. form. By making the sides of the aluminum plate θa irregular, a large number of radiation fins αQ parallel to a platen (not shown) are formed. A cover is attached to the case 02 using the pins 09 and the like used when integrating the case θ2.

This horn bar 0 snout is used before the hole OG is formed in the aluminum plate α. Left side, G! (H is an assembly hole for connecting the aluminum plate 04 and the cover 09 with the pin α9. Also, in the aluminum plate 0 in the front row, there is a receiving hole H into which the screw OJ is inserted. It is formed.

In such a configuration, the case (c) having radiating fins is formed by fixing a plurality of aluminum plates (141) formed by press working in a laminated state with irregular sides. , it is possible to form expensive υ at low cost and extremely easily without using 'r'i mold1.
．． Ru. Also, depending on the number of stacked aluminum plates α, the cost is 0.
The thickness can be adjusted freely.

Since the aluminum plate α small constituting the case θ2 has a uniform rectangular shape, the number of press dies can be reduced, and the case 0 can be formed at a lower cost.

Next, when a dot printer head having such a case 0z is attached to a carriage (not shown),
By aligning the sliding direction of this carriage, which is parallel to the axial direction of the platen (not shown), with the upper and lower parts of the radiation fins (IQ), air can easily flow between the radiation fins 00 and the cooling effect is promoted. .

〔Effect of the invention〕

Since this invention is constructed as described above, a case having heat dissipation fins can be formed by simply stacking 4% gold plates with irregular sides, making it possible to easily and inexpensively form a case. In addition, the dimensional sheathness can be increased, and since the radiation fins are parallel to the platen,
This has the effect of improving the ventilation of the heat radiation fins and further enhancing the heat radiation effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional example, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the case and cover. 10... Needle, 11... Guide frame, 12
...Case, 14...Aluminum plate (metal plate), 16.
...hole, 17...storage part, 18...radiating fin Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] By providing a guide frame that aligns and slidably holds I IN number of needles, and fixing a plurality of gold plate plates in a stacked state with irregular sides, a large number of heat dissipating fins can be produced. A case is provided, the guide frame is attached to the front surface of the case, and holes formed in each of the laminated gold plates form a storage portion for storing magnetic circuit components for operating the needle. dot printer head. 2. The dot printer head according to claim 1, wherein the metal plate has a rectangular shape.