JPS597756Y2 - timing lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a timing lamp used for timing measurement of rotation, piston movement, etc. of a mechanical system.

For example, in an engine, adjusting the fuel injection timing is essential for increasing the efficiency of the engine.

Timing lamps using discharge tubes are widely used for measuring injection timing.

Conventionally, this type of timing lamp has the disadvantage that it is simply a light emitter and cannot measure timing timing by itself.

In order to eliminate the above-mentioned drawbacks of the conventional technology, the inventors of the present invention have been conducting research on a device that measures the injection timing of fuel or the like based on the rotation angle of a variable resistor.

The present invention has been made in view of the above-mentioned conventional circumstances, and therefore, the purpose of the present invention is to provide a variable resistor for measuring the timing and a power switch for the discharge tube, so that it can be used, for example, in an engine. To provide a new timing lamp capable of measuring the injection timing of fuel etc. with high accuracy and very easily with one hand.

The object of the present invention is to provide a discharge tube, a power switch for the discharge tube, and a variable resistor for adjusting the timing of light emission of the discharge tube.
A knob for operating the variable resistor and a case equipped with all of the above components, and a timing lamp configured to operate the power switch and the knob from outside the case. Ru.

That is, the present invention proposes a new timing lamp that is newly equipped with the above-mentioned variable resistor in addition to the conventional structure, and is also equipped with a power switch for the discharge tube, which was not installed in conventional timing lamps. It is something to do.

Hereinafter, a preferred embodiment of the present invention will be explained in detail with reference to the drawings.

FIGS. 1a, 1), and 1c are a front view, a left side view, and a right side view showing the external shape of a timing lamp according to the present invention.

FIG. 2 is a sectional view of the timing lamp shown in FIG. 1.

In the figure, reference numeral 1 indicates a power switch for the discharge tube, and 2 is a disc-shaped knob attached to the shaft 11 of the variable resistor 10 and having a detection scale 2a formed on its surface.

Reference numeral 3 indicates a discharge tube, 4 a lens for condensing light emitted from the discharge tube 3, and 5 a circuit network necessary for adjusting the timing of light emission from the discharge tube 3.

The above components are installed in one case 6.

That is, the power switch 1 and the lens 4 are mounted on a case 6, and the discharge tube 3 and the circuit network 5 are mounted on a printed circuit board 7 fixed to the case 6.

The variable resistor 10 is attached to a bracket 8 fixed to a printed circuit board.

Further, the circuit network 5 is composed of a transformer 9, a capacitor 13, and the like.

Reference numeral 12 indicates a cabtire cord supported by the case 6 by a cord stopper 14, and has a built-in conductor 15 for guiding the input of the circuit network 5.

Next, a case will be described in which the operation of the timing lamp configured as described above is applied to measuring the fuel injection timing of an engine.

In the conventional timing lamp, an electric signal indicating when to inject fuel is input to the circuit network 5, and the discharge tube 3 emits light in a pulsed manner in response to the electric signal.

This light emission is irradiated onto a rotating disk (not shown) that is linked to the piston movement of the engine.

This rotating disk is equipped with a scale that indicates the position of the piston, and this scale is stopped and observed by the above-mentioned light emission, and the deviation of the scale from the specified position (for example, the highest point of the piston) is detected. The injection timing can be determined by the angle.

In the timing lamp according to the present invention, the circuit network 5 is further configured to include a variable resistor 10 so that the resistance value of the variable resistor 10 can be changed by rotating the knob 2 to shift the discharge timing of the discharge tube 3. 10 and a certain CR time constant circuit made up of a capacitor.

Therefore, by rotating the knob 2, returning the observed scale from the deviated state to the specified position, and measuring the rotation angle of the knob 2 from the detection scale 2a provided on the knob 2, the injection Highly accurate measurement of timing becomes possible.

The knob 2 is installed so that it can be operated from the surface of the case 6, so it is extremely easy to operate.Furthermore, since the power switch 1 of the discharge tube 3 is also installed in the same way as the knob, it can be turned on. ” and “off” operations can be easily performed.

Therefore, the burden on the measurer can be reduced, especially during long-term use.

As described above, according to the present invention, it is possible to realize a timing lamp that makes it possible to measure the timing and operate the discharge tube power switch extremely easily with one hand operation, and its practical effects are as follows: It is extremely large.

[Brief explanation of the drawing]

Figures 1a, l), and c are a front view, a left side view, and a right side view showing an embodiment of the timing lamp according to the present invention,
FIG. 2 is a sectional view showing the inside of the embodiment shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Power switch, 2... Knob, 3... Discharge tube, 4... Lens, 5... Circuit network, 6... Case, 7... Printed circuit board, 8... Brackets 1~, 9・
...Transformer, 10...Variable resistor, 11...Shaft, 12...Captire cord, 13...Capacitor, 14...Cord stopper, 15...Conductor.

Claims (2)

[Scope of utility model registration request] (1) A case equipped with a discharge tube, a power switch for the discharge tube, a variable resistor for adjusting the emission timing of the discharge tube, a knob for operating the variable resistor, and all of the above-mentioned components. A timing lamp characterized in that the power switch and the knob are configured to be operated from outside the case. (2) The timing lamp according to claim (1), further characterized in that the knob is provided with a scale for detecting the light emission timing.