JPH0249834B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a laser marking device that applies marks such as a plurality of characters and symbols by irradiating a laser beam onto the surface of an object to be marked.

(Prior Art) Marking with laser light is used for electronic components such as semiconductors, bottles, etc. In this case, in general, in order to mark marks such as letters, symbols, and designs, these marks must be marked. A mask with corresponding mark holes is used, a laser beam is applied to this mask, and the laser beam that passes through the mark hole is irradiated onto the surface of the object to be marked, thereby marking the same mark as the mark hole on the object to be marked. .

When marking multiple characters, symbols, etc., conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 55-58349, a plurality of rotating disks whose outer diameters gradually increase are concentrically provided as a mask. , mark holes corresponding to characters, symbols, etc. provided on the periphery of these disks are used in combination in the radial direction of the disk. In addition, as shown in Japanese Unexamined Patent Application Publication No. 59-29178, a plurality of rotating disks are used as masks, transparent windows are provided on their mutually opposing peripheral edges, and the mutually opposing A mask plate having mark holes for characters, symbols, etc. to be combined is provided in the transparent window, and a desired mark is obtained by combining these mask plates.

However, with these masks, if, for example, numbers and alphanumeric characters are to be displayed in combination and the order of marking is to be changed, the rotating disk, mask plate, etc. must be replaced.

In addition, conventionally, as shown in Japanese Utility Model Publication No. 61-215, in a light beam type numbering device,
A plurality of disc-shaped mask support plates are concentrically and rotatably arranged one on top of the other, and a plurality of masks are attached to the concentric periphery of each mask support plate, and each mask is provided with a horizontally long transmission window and a plurality of masks. A translucent character part is formed at a predetermined digit position of this transmission window, and with the desired mask of each mask support plate aligned, a light beam from a light source is irradiated onto the object to be marked through each mask. It is known that a multi-digit number is printed using a translucent character section.

(Problems to be Solved by the Invention) In the above numbering device, a translucent character portion is arranged on each mask at a predetermined digit position determined for each mask support plate,
Although it is possible to display only a plurality of digits, it is not possible to combine desired digits with letters such as alphanumeric characters, symbols, etc. That is, even if the translucent character portion of the mask of a predetermined mask support plate is a character, symbol, etc. other than a number, the position of the digit is fixed, so it cannot be applied to other digits.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laser marking device that can easily mark characters and symbols in different combinations, such as in different arrangement orders.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a laser marking device that performs marking by irradiating a laser beam onto an object to be marked through a mark hole provided in a mask. The mask plates should be supported concentrically and rotatably overlappingly with respect to a central axis provided along the optical axis of the laser beam, and markings should be made on concentric circles of a predetermined radius with respect to the center of each mask plate. Mark holes for letters, symbols, etc. are provided at regular intervals, and horizontally elongated transmission windows of a constant size are provided between each of these mark holes for arranging the mark holes of other mask plates.

(Function) In the present invention, when marking a mark with a combination of a plurality of characters, symbols, etc., first select the mark hole provided on the peripheral edge of the mask plate closest to the laser light source, and then select either the left or right side of the mark hole. By arranging the mark holes provided on one of the other mask plates in the transparent window located next to the one, and then sequentially arranging the mark holes of each mask plate in the same manner, desired characters, symbols, etc. By combining the desired order of
It is used to obtain marks and perform markings.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 3 shows the overall configuration of the laser marking device. In the figure, 11 is a condensing lens,
It receives laser light 12 from a laser light source and focuses it. 13 is a mask, which is provided to face the focused laser beam 12;
2 is provided with a mark hole 14 in the shape of a character, symbol, etc. to be marked. 1
Reference numeral 5 denotes a reduction lens which reduces the size of the laser beam 12 that has passed through the mark hole 14 of the mask 13 and irradiates it onto the surface of the object to be marked.

As shown in FIGS. 1 and 2, the mask 13 includes a plurality of disc-shaped mask plates 13a and 13b.
. . . 13f are each supported concentrically and rotatably in a polymeric manner with respect to a common central axis 19 provided along the optical axis of the laser beam 12. Each of the mask plates 13a to 13f is provided with mark holes 14 with characters, symbols, etc. to be marked at regular intervals on a concentric circle 17 set at a predetermined radius from the center, and between each of these mark holes 14. Each of them is provided with a horizontally long fixed transmission window 18. The transmission window 18 is set to a size that allows the mark holes 14 provided in the other masks 13a, 13b, . . . , 13f to be arranged in sequence.

In the above configuration, when applying a mark such as "SN300N" to the surface of the object to be marked, first, the mask plate 13 of the first stage closest to the laser light source is
The mark hole 14 for "S" in a is inserted into the condenser lens 11.
The marking area 20 is located at the left end of the marking area 20 formed by the laser beam 12 focused by the laser beam 12 . Next, the mark hole 14 for "N" of the next stage mask plate 13b is formed at the left end of the transmission window 18 on the right side of the mark hole 14 for "S" of the first stage mask plate 13a. position. Furthermore, the transmission window 1 on the right side of the mark hole 14 for "N" of this mask plate 13b
"3" of the next stage mask plate 13c is placed on the left end part of 8.
position the mark hole 14 for use. Thereafter, in the same manner, the next stage mask plates 13d and 1
Mark hole 14 for "0""0""" of 3e, 13f
are sequentially positioned, and mark holes 14 for the mark "SN300N" are sequentially arranged in the marking area 20. And the above marking area 20
A laser beam 12 focused by a condensing lens 11 is applied to the inside of the mark hole 1 for the "SN300N".
Transmit 4. The laser beam 12 transmitted through the mark hole 14 is reduced in size by a reduction lens 15 and irradiated onto the surface of the object to be marked, thereby marking the object.

Moreover, in the above case, each mask plate 13a, 13b
. . . The mark holes 14 are arranged in sequence in the order of 13f, but these orders can be set freely. That is, each mask plate 13
Each mask 13b, 13c of the next stage is placed in the transmission window 18 on the right side of the mark hole 14 of a, 13b...13e.
In addition to positioning the mark hole 14 of 13f, the mark hole 14 may also be located on the adjacent transmission window 18 on the left in the drawing.Furthermore, the position can be freely set, and a desired order of arrangement can be obtained.

In this way, when marking a mark that combines multiple characters, symbols, etc., multiple mask plates 1
Mark holes 1 provided in 3a, 13b...13f
4, the transmission window 1 on either the left or right side of the mask plate in the previous stage
8 can be arranged sequentially in the marking area 20, thus making it easy to accommodate different combinations of characters, symbols, etc. in a desired order.

〔Effect of the invention〕

As described above, according to the present invention, when marking a mark with a combination of a plurality of characters, symbols, etc., it is possible to easily mark marks with different combinations of characters, symbols, etc. in a desired order.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing essential parts of an embodiment of a laser marking device according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is an explanatory diagram of the entire laser marking device. 12... Laser light, 13... Mask, 13a, 13
b...13f...Mask plate, 14...Mark hole, 17
...Concentric circles, 18...Transmission window, 19...Central axis.

Claims (1)

[Scope of Claims] 1. A laser marking device that performs marking by irradiating a laser beam onto an object to be marked through a mark hole provided in a mask, wherein the mask includes a plurality of disc-shaped mask plates,
Characters, symbols, etc. to be supported concentrically and rotatably overlappingly with respect to a central axis provided along the optical axis of the laser beam, and to be marked on a concentric circle of a predetermined radius with respect to the center of each mask plate. What is claimed is: 1. A laser marking device characterized in that mark holes are provided at regular intervals, and a horizontally elongated transmission window of a constant size is provided between each mark hole to arrange mark holes of other mask plates.