JPS6317126Y2 - - Google Patents

Description

[Detailed description of the invention] Field of industrial application This invention relates to an illumination device in which an illumination lamp attached to the tip of a long, thin sleeve-like cylinder can be turned on and off by touching the tip of the finger while holding it between the fingers.

BACKGROUND TECHNOLOGY This type of lighting device has a cylinder shaped like a pencil, a pushbutton switch is provided at a suitable position on the cylinder, and the pushbutton switch is pressed while holding the cylinder diagonally like a writing instrument. There are already known devices in which an illumination lamp provided at the tip of the cylindrical body can be turned on when the cylinder body is turned on.

However, this type of lighting device has the following problems specific to contact lighting devices.

That is, first, the pushbutton must be embedded in the sleeve-like cylinder, which complicates the assembly process and increases costs accordingly.

Second, if the switch is used for a long time, the contact resistance increases due to wear of the contacts, which is a disadvantage of mechanical switches, and the strength of the spring varies, resulting in poor durability.

Problems to be Solved by the Invention The problems to be solved by the invention are to provide a lighting device that can be turned on by a so-called touch operation, which is suitable for mass production and has improved durability.

Means for Solving the Problems According to the present invention, the above problems are solved by the following means.

That is, in the sleeve-shaped cylindrical body, two parts made of a conductive material that constitute the current-carrying loop of the illumination lamp are attached.
The structure is such that the two parts are insulated with an insulating spacer, and when the two parts made of conductive materials are short-circuited by straddling the insulating spacer with the tip of a finger to close the current carrying loop. The structure is such that only the lighting lamps are energized.

Effects and Effects of the Invention According to the lighting device of the invention, only when the two parts made of conductive materials formed in the sleeve-shaped cylinder are short-circuited by straddling them with one's finger, the current-carrying loop is closed and the lighting is illuminated. Since the lamp is energized and lit, there is no need to press the push button switch one by one with the fingertip, and the illumination lamp can be turned on simply by moving the fingertip while being held diagonally like a writing instrument.

Therefore, according to the present invention, the following remarkable effects are achieved due to its structural features.

That is, since there is no need to embed the push button in the sleeve-shaped main body, the assembly process is simplified, mass production is improved, and the manufacturing cost is reduced accordingly.

In addition, unlike mechanical contacts, contact resistance does not increase due to contact wear, and the strength of the spring does not vary, so it has good reliability and durability.

Embodiments of the invention Hereinafter, embodiments of the invention will be shown with reference to the accompanying drawings.

The embodiment shown here has a structure in which the energization loop is closed using finger contact resistance.

That is, to roughly explain the structure of the lighting device A of the present invention, the cylindrical body 4 formed in the shape of an elongated sleeve is made of a conductive material constituting a current-carrying loop, as clearly shown in FIG. The two parts formed by 1 and 2 are connected by an insulating spacer 3, and an illumination lamp 5 is embedded in the tip of the part made of a conductive material that constitutes the front part of the cylinder 4. There is.

In the figure, 6 and 7 are power supply 10 for illumination lamp 5.
It is a lead for passing current, and the power supply 10
The battery constituting the cylindrical body 4 is built into the rear part of the cylinder body 4.

FIG. 2 is a block diagram showing the electrical structure of the lighting device A of the present invention.

To explain with reference to the figure, 51 is the illumination lamp 5
, 13 is a sensing circuit, 3 is an insulating spacer that insulates and separates the part of the cylinder 4 made of the two conductive materials 1 and 2, 10 is a battery power source, and the insulating spacer 3 is straddled with a finger. cylindrical body 4
When the parts 1 and 2 made of two conductive materials are short-circuited, the current supply loop is closed, the sensing circuit 13 is driven, and current is supplied to the filament 51 from the battery power supply 10, so that the filament 51 lights up. However, when you release your finger from the insulating spacer 3 and insulate and separate the parts made of the two conductive materials 1 and 2, the current loop opens and the sensing circuit 13 cuts off the current being supplied to the filament 51, causing the illumination lamp to shut off. 5 is for turning off the light.

FIG. 3 is an electrical circuit diagram of the lighting device A of the present invention, showing the above block diagram in more detail.

With reference to this figure, the illumination device A of the present invention
To explain the configuration, the sensing circuit 13 is constructed by combining an IC chip 11 with a PNP transistor 12 as a filament driver.
The V _DD terminal of the IC chip 11 is connected to a DC battery serving as a power source, and the GND terminal is connected to a part of the cylindrical body 4 and grounded. Furthermore, the above-mentioned PNP transistor 12 is connected to the OUT terminal of the IC chip 11, and the IN terminal is connected to the diode D.
2 to one part of the cylindrical body 4 made of conductive material 2, and further connected to a capacitor C2 and a resistor R.
It is connected to the DC battery power supply 10 via a parallel circuit consisting of R2 and R3.

Here, R2 is a resistance element for sensitivity adjustment,
R1 is a resistive element for voltage supply, D1 and D3 are backflow prevention diodes, and C1 is a capacitor for noise prevention.

In such a configuration, the operation of the device A of the present invention will be explained. Even if the cylindrical body 4 is held, when the insulating spacer 3 is not touched with a fingertip, the current-carrying loop is kept open by the insulating spacer 3. Therefore, C2 and R are connected to the IN terminal of IC chip 11.
A voltage of a predetermined level is supplied through a parallel circuit consisting of 2 and R3, and therefore the voltage between the base and emitter of transistor 12 is high, and since transistor 12 is in a non-conducting state, the battery Since no current is supplied from the power source 10 to the filament 51, the illumination lamp 5 remains in the off state.

However, if you touch the insulating spacer 3 with your fingertips and short-circuit the two conductive materials 1 and 2 to close the current loop, the input voltage at the IN terminal of the IC chip 11 becomes the GND level, and as a result, the transistor 12 The base-emitter voltage of
PNP transistor 12 becomes conductive.

When the PNP transistor 12 becomes conductive, current is supplied to the filament 51 from the battery power supply 10 via the conductive transistor 12.
The filament 51 is energized and the illumination lamp 5 is lit.

In this way, the illumination lamp 5 lights up every time the fingertip touches the insulating spacer 3, and turns off when the fingertip touches the insulating spacer 3.

The device of the present invention, which has the above-mentioned structural features, can be used not only as an ordinary small lighting device, but also as a dental mirror for dentistry, an autopsy tool for otorhinolaryngology and obstetrics and gynecology, and industrial equipment. It is extremely useful for use as a lighting device for examining dark and narrow places where it is difficult to perform an examination under normal conditions, such as a medical examination tool.

FIG. 4 shows an example of the illumination device of the present invention configured as a dental mirror for dental use, in which the cylindrical body 4 with the mirror 12 attached to the tip is held between the fingers and the fingertip (index finger) This shows a state in which the two parts 1 and 2 made of conductive material are short-circuited across the insulating spacer 3 to close the current supply loop, and the illumination lamp 5 is turned on.

In the figure, 14 indicates a cord connected to a power supply device (not shown), and this dental mirror is shown as being equipped with a cord.

In addition, in the embodiment shown in FIG. 1, the device A of the present invention is of a cordless type that is shaped like a pencil for convenient portability, but the device A of the present invention is applicable only to this embodiment. It is not limited to this, and it may be possible to supply power to the illumination lamp via a cord from a power supply device (not shown); in this case, the cylindrical body may be connected to a rechargeable power source via the cord. A type in which the cylinder body is connected to a commercial power source through a step-down transformer is preferably adopted.

Furthermore, the device of the present invention may be used by being attached to a dental unit, bed, cabinet, treatment table, etc. In this case, it can be stored in a dental bed, etc. like a well-known dental handpiece. This makes handling easier and is extremely beneficial.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the main part of the lighting device of the present invention, Figure 2 is a block diagram schematically showing the electrical mechanism of the lighting device of the present invention, and Figure 3 is the same as shown in Figure 2. FIG. 4 is an electric circuit diagram showing the block diagram in more detail, and is a diagram showing an example of use of the lighting device of the present invention. Explanation of symbols: In the figures, A is the lighting device of the present invention, 1 and 2 are both parts made of conductive material, 3
is an insulating spacer, 4 is an elongated sleeve-shaped cylinder,
5 is an illumination lamp.

Claims (1)

[Claims for Utility Model Registration] An illumination device comprising an elongated sleeve-shaped cylinder with an illumination lamp at its tip and held between fingers to turn on the lamp, the sleeve-shaped cylinder comprising: The parts made of two conductive materials constituting the current-carrying loop are held insulated with an insulating spacer interposed between them, and the parts made of the two conductive materials are short-circuited by pressing the insulating spacer with a fingertip. . A lighting device characterized in that the lamp is turned on by closing the energizing loop and energizing the lamp.