JPH0221231Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a laser printing device for inscribing characters, symbols, and other predetermined patterns on a printing substrate using a laser beam, and in particular improves the metal mask plate fixing device thereof. Regarding.

(b) Prior Art A laser printing device is used, for example, to stamp a product name or other characters or symbols on the surface of a molded resin layer of a resin-sealed semiconductor device.

FIG. 3 shows a conventional laser printing device, in which a laser beam 1 is focused by a condensing lens 2, and then passed through a metal mask plate 4 having a predetermined pattern of through holes 3, and then a condensing lens (not shown). through which the surface of the object 5 to be printed is irradiated. In this way, a predetermined pattern having the same shape as the through holes 3 formed in the metal mask plate 4 is engraved on the surface of the object 5 by the laser beam 1.

(c) Problems to be solved by the invention In the conventional laser printing apparatus described above, when the metal mask plate 4 is set in the mask holder 6 as shown in FIG. After inserting a plurality of metal mask plates 4 so that the holes 4A fit into the pilot pins 7 installed upright at the four corners of the front side of the mask holder 6, the tips of the pilot pins are inserted into the pilot pins 7 made of rubber or metal. It was set by tightening it with a tightening member 8 made of aluminum. However, the location where the mask holder 6 is actually installed is insulated to protect each part from the high voltage used to extract the laser beam, so it is extremely difficult to operate from the outside. It was difficult to attach or remove the metal mask plate 4.

(d) Means for solving the problem The metal mask plate fixing device for laser printing equipment according to this invention was devised in view of the above points, and a magnet is attached to a part of the mask holder. The metal mask plate is suctioned and fixed in a predetermined place using the suction force of The purpose is to improve the

(e) Embodiment Figures 1 and 2 show an embodiment of this invention. Reference numeral 9 denotes a mask holder, which has a window hole 10 formed in a portion corresponding to the through hole 3 formed in the metal mask plate 4, that is, approximately in the center, and has pilot pins 11, 11 standing on the front side at both upper corners. In addition, magnets 12, 12 are embedded in the upper and lower ends. In such a device, the pilot pins 11, 11 are connected to the through holes 4A, 4A at both upper corners of the mask plate 4.
After inserting the required number of mask plates 4, each mask plate 4 is attached to the mask holder 9 using the fixing plate 13 which is attracted to the mask holder 9.
Press it to fix it. The fixed plate 13 is made of a magnetic material such as iron, and has a window hole 14 formed in its center, and pilot pins 11,
11 are formed with through holes 15, 15 that can be inserted thereinto. 16, 16 is a trip lever and fixing plate 1
It is rotatably attached to both sides of 3. In the normal state, the tips 16A, 16A of the tripping lever protrude from the front surface of the fixed plate 13, and are shaped like handles that can be rotated with the fingers. On the other hand, the other ends 16B, 16B of the tripping lever form a tripping cam, and the distal end thereof is usually mounted on the same level as the back surface of the fixed plate 13 or slightly lower than the back surface. Lever 16, 16
When the magnet 1 is rotated, the other ends 16B, 16B protrude from the back surface of the fixed plate 13, and the magnet 1
2 and 12 can be released from the adsorption state.

In addition, in the embodiment, the mask holder 9 is equipped with a magnet 12,
12 has been described, it goes without saying that magnets may be attached only to the fixed plate 13 side, or magnets may be attached to both the mask holder 9 and the fixed plate 13.

(f) Effect of the invention Therefore, according to the metal mask plate fixing device according to this invention, after a desired number of mask plates 4 are sequentially inserted into the pilot pins 11, 11 of the mask holder 9 and attached in a stacked manner, the mask plate is fixed. Since the mask plate 4 is pressed and fixed from above by the fixing plate 13 which can be attracted to the holder 9, the mask plate can be attached very easily.

In addition, when removing, the adhesion between the mask holder 9 and the fixed plate 13 can be released by rotating the release levers 16, 16 with your fingers, so the fixed plate can be removed with a one-touch operation. Even in locations that are difficult to access from the outside, the mask plate can be attached and removed very easily, which is beneficial for improving work efficiency.

[Brief explanation of the drawing]

Figures 1 and 2 both show one embodiment of this invention, with Figure 1 being a vertical sectional side view of the metal mask plate fixing device, Figure 2 being an exploded perspective view of the same, and Figure 3 being a schematic diagram of the laser printing device. The explanatory drawing, FIG. 4, is a longitudinal sectional side view of a conventional metal mask plate fixing device. 1... Laser beam, 2... Condensing lens, 3...
...Through hole, 4...Metal mask plate, 5...Printing material,
6, 9...Mask holder, 10, 14... Window hole,
7, 11... Pilot pin, 12... Magnet, 1
3... Fixed plate, 16... Tripping lever.

Claims (1)

[Claims for Utility Model Registration] (1) A laser beam is focused by a condensing lens, and the laser beam is irradiated onto the printing material through a metal mask plate having a predetermined pattern of through holes, thereby producing the predetermined pattern on the printing material. In a laser printing device for printing, a window hole is formed in a portion corresponding to the through hole of a metal mask plate, a pilot pin that supports the metal mask plate is erected on the front side, and a magnet is attached to a part. a mask holder, a fixing plate that is guided by the pilot pin and is attracted to the mask holder with a metal mask plate interposed between the mask holder and the mask holder, and a fixing plate that is rotatably attached to the fixing plate. A metal mask plate fixing device for a laser printing apparatus, comprising a tripping lever that releases the suction state by operating a lever protruding from a fixing plate. (2) A metal mask plate fixing device for a laser printing device according to claim 1 of the utility model registration claim, which comprises a magnet attached to the fixing plate side.