JPH0434933Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a low melting point glass coating device for coating a low melting point glass on the inner surface of a cap body, and is particularly applicable to a cap for accommodating an optical semiconductor element in an optical semiconductor device. The present invention relates to a low melting point glass coating device which is effective for use in advance coating the inner surface of the bottom surface of the flange of a cap body with low melting point glass for heat sealing a light transmitting window to the main body.

(Technical Background) This type of coating device needs to be configured to be able to coat low-melting glass that is homogeneous and has a uniform thickness.

(Prior art and problems) Conventionally, this type of coating device fills a dispenser using air with liquid low-melting glass, which is a mixture of powdered low-melting glass and a binder, and fixes the cap body. It is conceivable that the worker would use Spencer's narrow injection nozzle to apply the coating to the inner corner of the bottom surface of the flange of the cap body while rotating the nozzle by hand, but it is difficult to obtain a uniform coating thickness with such manual work. Moreover, since the glass powder precipitates, it is difficult to uniformly coat the dispenser unless the dispenser is constantly shaken by hand.

(Purpose of the invention) This invention was proposed to eliminate the above-mentioned drawbacks, and involves applying liquid low melting point glass homogeneously and with a uniform thickness on the inner corner circumference of the bottom surface of the flange of the cap body. The purpose is to

(Means for solving the problem) The purpose of this invention is to heat-seal a light transmitting window on the inner surface of the flange bottom of a cylindrical cap body that is open at one end and has an inwardly bent flange bottom at the other end. In a low melting point glass application device for applying low melting point glass to the inner surface of a cap body, there is a space between the position where the low melting point glass is applied to the cap body and the attachment/detachment position of the cap body which is located away from the application position. a receiving member which is rotatably supported on a movable body which is provided to be reciprocally movable, and is seated so that the cap main body can be taken out with one end of the cap body facing upward; and the movable body is attached to and detached from the application position. a moving mechanism for moving the receiving member between positions; a rotation driving means for rotating the receiving member about the axis of the cap body; a dispenser support rotatably provided between a position facing the inner surface of the bottom surface of the flange of the cap body via a small gap and a position located outside the opening of the cap body; This is achieved by an apparatus for applying low melting point glass to the inner surface of the cap body, which is characterized by being equipped with a rotation mechanism for rotating the body.

(Operation) The cap body is placed on the receiving member with one end of the opening facing upward, and the moving body moves the receiving member to the application position, and the receiving member is rotated about the axis of the cap body.

After the dispenser is rotated by the dispenser support mechanism to a position where the nozzle tip faces the inner surface of the bottom surface of the flange of the cap body through a small gap, a fixed amount of liquid low-melting glass is discharged from the nozzle. By keeping this discharge amount constant, the nozzle tip stirs the coated low melting point glass to make it uniform and uniform in thickness, and the centrifugal force from the rotation of the cap body spreads the low melting point glass, making the coated thickness even more uniform. can do.

Next, the dispenser is rotated so that its nozzle tip is positioned outside the opening of the cap body, and the moving body moves the receiving member to the take-out position, and the cap body after application is taken out.

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

1A and 1B are a top view and a side sectional view showing a metal cylindrical diameter cap body of an optical semiconductor device to which the present coating apparatus is applied.

As shown in the figure, the cap body 1 has an opening 2 at the top and an opening 4 at the bottom with a flange bottom surface 3 bent inward.

Then, liquid low melting point glass 5 is applied on the circumference of the bottom corner of the inner surface of the cap body 1, and after heating in this state to remove the binder of the low melting point glass and perform glazing treatment, a light transmitting window is formed. Glass 6 (shown by dotted lines) forming the cap body is placed inside the cap body and heated to melt the low melting point glass 5, thereby making the opening 4 airtight.

Furthermore, an optical semiconductor element (not shown) is enclosed within the cap body 1 to constitute an optical semiconductor device.

2 and 3 are a top view and a side view as seen from the dispenser side, showing the low melting point glass coating device according to the present invention. Further, FIG. 4 is a diagram showing the low melting point glass coating operation of the apparatus of the present invention.

In the figure, 7 is a base plate, 8 is a partition plate, 9 is a camshaft motor, 10 is a gear train, 11 is a camshaft, 1
2 is a manual handle, 13 and 14 are camshafts 11
15 and 16 are cam plates fixed to the substantially oval shaft 11, 17 is a dispenser filled with liquid low melting point glass as in the past, 18 is an injection nozzle at the tip, and 19 is an injection nozzle at the tip of the dispenser 17. 20 is a rotating shaft to which the supporting arm 19 is fixed at one end, 21 is a bearing of the rotating shaft 20 attached to the partition plate 8, and 22 is a rotating shaft 20 whose one end is fixed to the rotating shaft 2.
a shaft 2 that connects the rotating shaft 20 and the cam plate 16, which are fixed to the other end of the cam plate 16 and whose other end is in contact with the cam plate 16;
3 is a receiving member on which the cap body 1 is seated; 24 is a receiving member 23 fixed to the motor shaft;
25 is an arm member; 26 is an arm member 25;
27 is the bearing of the shaft 26, 28 is the arm member 2
The abutment member 29 of the cam plate 15 led out from 5 is a return spring of the arm member 25.

The arm member 25 corresponds to a moving body, and the camshaft motor 9, camshaft 11, cam plate 15, abutting member 28, etc. constitute a moving mechanism for the moving body. Further, the support arm 19 corresponds to a support body, and the camshaft motor 9, camshaft 11, cam plate 16, shaft 22, rotating shaft 20, etc. constitute a rotation mechanism of the support body.

When the motor 9 is driven by a foot switch or the like, the shaft 11 rotates through the gear train 10, and this shaft rotation causes the support arm 19, which supports the dispenser support mechanism and the cap body 17, to rotate through the cam plates 15 and 16. Arm member 25 is driven.

That is, during one revolution of the shaft 11, the support arm 19 rotates from the position shown in FIG. 3 in the direction of arrow a so that the injection nozzle 18 faces the bottom corner position of the inner surface of the gap main body 1 through a small gap. Then, in this inserted state, electrical input from the air supply device to the dispenser 17 is performed for a certain period of time, and a certain amount of liquid low melting point glass 5 is discharged from the nozzle 18. After this application, the support arm 19 rotates in the direction of arrow b and returns to the position shown in FIG. The coating is applied to a large number of cap bodies 1 while being replaced one after another.

The rotational movement of the support arm 19 in the directions of arrows a and b is achieved by one rotation of the cam plate 16 by the shaft 11, which causes the shaft 22 to move in the directions of arrows a and b due to the external shape of the cam plate 16. 20 is similarly rotated and moved.

On the other hand, during one rotation of the shaft 11, the arm member 25 rotates in the directions of arrows c and d about the shaft 26 via the abutment member 28 due to the external shape of the cam plate 15 and the spring force of the spring 29. The cap body is moved.

The relationship between the movement of the cap body and the movement of the dispenser is such that when the support arm 19 is in the position shown in FIG. 3, the arm member 25 is in the position shown by the solid line in FIG. From this state, the arm member 25 moves to the dotted line position when the support arm 19 moves in the direction of the arrow a to perform coating, and further moves in the direction of the arrow b to reach a position where the nozzle 18 is not caught on the cap body 1. The cap body 1 can be moved and taken out. After this, the arm member 25 moves again to the solid line position.

This movement of the cap body and the movement of the dispenser is performed every rotation of the shaft 1, and the rotation of the shaft 11 is controlled by the operator's foot switch.

Also, while the cap body 1 is being operated, the arm member 25 is in the second position.
When in the solid line position in the figure, the motor 24 causes the receiving member 2 to
The second
The motor 24 is stopped at the position indicated by the dotted line in the figure, and the cap body 1 is taken out.

In this way, in the low melting point glass coating of this device, the fourth
As shown in the figure, since the liquid low melting point glass 5 is applied while the cap body 1 is rotating and is discharged from the nozzle 18 of the dispenser 17, if the discharge amount is kept constant, the low melting point glass will be applied at the tip of the nozzle. The low melting point glass is stirred to have a constant thickness and uniformity, and the centrifugal force caused by the rotation of the cap body spreads the low melting point glass, further making the coating thickness uniform.

Furthermore, by changing the rotation speed of the cap body 1 using a speed control motor, more uniform application can be achieved.

Further, the liquid low melting point glass 5 in the dispenser 17 is agitated by the rotational movement of the dispenser 17 in the directions of arrows a and b, and precipitation of glass powder can be prevented, so that uniform application is possible.

(Effects of the invention) According to the invention, compared to manual work using conventional dispensers, the low melting point glass is stirred by the nozzle tip, and centrifugal force is applied by rotating the cap body. This makes it possible to apply the low melting point glass homogeneously with a uniform coating thickness, and the automation of the application operation facilitates mass production.

[Brief explanation of the drawing]

1A and 1B are a top view and a side sectional view showing a metal cylindrical cap body of an optical semiconductor device to which this coating device is applied, and FIGS. 2 and 3 show a low melting point glass coating device according to the present invention. FIG. 2 is a top view and a side view seen from the dispenser side. FIG. 4 is a diagram showing the low melting point glass coating operation of the apparatus of the present invention. Explanation of symbols: 1... Cap body, 17... Dispenser, 18... Nozzle, 19... Support arm, 23... Receiving member, 24... Motor, 25...
...Arm parts.

Claims (1)

[Claims for Utility Model Registration] Low melting point for heat-sealing a light transmitting window to the inner surface of the flange bottom of a cylindrical cap body that is open at one end and has an inwardly bent flange bottom at the other end. In a low melting point glass application device for applying glass to the inner surface of a cap body, it is possible to reciprocate between the position where low melting point glass is applied to the cap body and the attachment/detachment position of the cap body which is located away from the application position. a receiving member which is rotatably supported on a movable body provided on the cap body and is seated on the cap body so that the cap body can be taken out with one end of the cap body facing upward; a moving mechanism for moving the receiving member; a rotation driving means for rotating the receiving member about the axis of the cap main body; a dispenser support rotatably provided between a position facing the inner surface of the bottom surface of the flange via a small gap and a position located outside the opening of the cap body; and rotating the dispenser support. 1. A device for applying low melting point glass to the inner surface of a cap body, characterized by comprising a rotation mechanism.