JP2884223B2 - Incandescent light bulb identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for identifying an incandescent lamp, and more specifically, for example, by detecting a state of a gas filled in an incandescent lamp, that is, a state of vacuum, and discriminating the quality of the lamp. The present invention relates to a device for identifying an incandescent lamp.

[0002]

2. Description of the Related Art In general, defective products may be manufactured in the process of manufacturing an incandescent lamp. For example, if the exhaust in the exhaust process is insufficient, the purity of a gas containing an inert gas such as argon as a main component is low, or if a slow leak occurs, the incandescent lamp will have a short life, Is reduced, or the maintenance property of the luminous flux is deteriorated.

[0003] Therefore, it is necessary to sort out and remove these defective incandescent lamps before shipping them to the market.

In view of this point, a conventional incandescent lamp is discharged, and its light spectrum is detected by a sensor or the like to determine a defect or to visually check a glow at the time of discharge.
The quality was judged (for example, Japanese Patent Application Laid-Open No. 62-193).
No. 056, JP-A-62-198047 and JP-A-62-198047.
287564).

[0005]

However, according to the incandescent lamp selection method described in the prior art, the light spectrum of the incandescent lamp at the time of discharge is detected by a sensor or the like.
First, the light emission amount of the light spectrum is small for a small light bulb or the like, and it is extremely difficult to judge the quality. Second, the judgment ability is easily affected by disturbance light and the like, and the judgment ability is reduced. There has been a problem that devices such as circuits and computers are large-scale and expensive.

In order to eliminate the drawbacks of the prior art, the present invention converts a discharge current flowing through a tube into a direct current voltage and directly reads the discharge current to identify an incandescent lamp capable of accurately discriminating the quality of the incandescent lamp. It concerns the device.

[0007]

In order to achieve the above object, an apparatus for identifying an incandescent lamp according to the present invention comprises: a discharge generator for applying a high voltage to an incandescent lamp to generate a discharge;
An identification device that converts a discharge voltage generated at the time of discharge into a DC voltage and compares the voltage with a determination level voltage to determine whether the incandescent lamp is good or not;

It is preferable that the frequency of the high voltage is near 300 KHz.

[0009]

When a high voltage is applied to an incandescent lamp, a discharge is generated, the discharge voltage of the incandescent lamp is converted into a DC voltage, and pass / fail is discriminated by comparing the level with a judgment level voltage provided by another circuit.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the state of use of the discharge generator, and FIG. 2 is a circuit diagram showing the relationship between the discharge generator and the identification device. In these figures, the discharge generator 1 has a discharge terminal 4 at an outer end of an arm 3 made of an insulator extending laterally from an upper portion of a stand 2 provided on a machine head (not shown). The discharge terminal 4 is electrically connected to an output terminal 6 of the high frequency generator 5 by a conducting wire 7. On the other hand, at the edge of the turntable 8 performing the intermittent movement, a chuck head 10 made of an insulator having a hole smaller than the maximum diameter of the bulb of the incandescent lamp 9 is provided, and the incandescent lamp 9 is inserted into this hole. Thus, the incandescent lamp 9 is configured to be held at a predetermined position. The incandescent lamp 9 is formed so as to intermittently move horizontally about 3 mm below the discharge terminal 4, and the discharge terminal 4 and the metal part 9 of the incandescent lamp
A discharge occurs between the discharge current and the discharge current a. As shown in FIG. 2, the identification device mainly includes a detection circuit 11 and a determination circuit 12. The detection circuit 11 is configured to detect a discharge voltage of the discharge generation device 1, exchange this with a DC circuit, and output the DC voltage to a determination circuit 12 having a comparison operation amplification circuit 13.

Next, the operation of this embodiment will be described using an example of a gas-filled light bulb. For example, an incandescent lamp 9 sealed in a glass bulb at a pressure of 82500 Pa (at room temperature) of a mixture of 90% argon gas and 10% nitrogen gas by volume ratio
Into the chuck head 10 and hold the turntable 8
Is positioned immediately below the discharge terminal 4 by the horizontal movement of. When a high voltage of about 300 KHZ generated by the high frequency generator 5 is applied between the metal part 9 a of the incandescent lamp 9 and the discharge terminal 4,
The incandescent lamp 9 generates a discharge. This discharge changes the discharge voltage in accordance with the gas state of the incandescent lamp 9, and is detected by the detection circuit 11 and converted into a DC voltage. The DC voltage is input to the comparison operational amplifier circuit 13, and the incandescent lamp 9 is dropped from the chuck head 10 or sent to the next step by comparing the magnitude with a separately set judgment level voltage. That is, when the voltage is higher than the judgment level voltage, it is sent to the next process as a non-defective product. Treated as

[0013]

According to the present invention, a discharge is generated in an incandescent lamp, the discharge current flowing through the bulb of the incandescent lamp is converted into direct current, and the voltage is directly read. There is an effect that the determination of the result becomes accurate.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a use state of a discharge generator applied to the present invention.

FIG. 2 is a circuit diagram showing a relationship between a discharge generator and an identification device.

[Explanation of symbols]

 1 Discharge generator 9 Incandescent lamp

Claims (2)

(57) [Claims] 1. A discharge generator 1 for generating a discharge by repeatedly applying a high voltage to an incandescent lamp 9 between a metal part 9a of the incandescent lamp 9 and a discharge terminal 4. And a discriminating device for discriminating the quality of the incandescent lamp 9 by comparing the magnitude with the judgment level voltage. 2. The voltage applied to the incandescent lamp 9 is 300 KH.
A device for identifying an incandescent lamp, wherein the device is repeated at a frequency near Z.