JPH07239449A - Laser pointer - Google Patents

Abstract

PURPOSE:To make it possible to simultaneously adjust turning on and off of a laser beam and magnitude of irradiation with one operation by controlling flickering of the laser beam and driving voltage of piezoelectric bimorphs by two variable resistors arranged in proximity. CONSTITUTION:The flickering of the laser beam and the driving voltage of the piezoelectric bimorphs are controlled by operation of the two variable resistors arranged in proximity of a laser pointer which displays graphics. These variable resistors consists of two sets of conductor patterns 16 (16a, 16b), 17 (17a, 17b) varying in resistance values formed respective to face each other on the surface of flexible sheets 11 arranged apart a spacing by a spacer 13. The opposite conductor patterns 16, 17 are supported contactably with each other by pressure contact of the sheets 11. The conductor pattern 17 as the variable resistors are capable of changing the driving voltage of the piezoelectric bimorphs and the other conductor pattern 16 permit turning on and off as switches for emission of the laser light.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a laser pointer, and more particularly to a laser pointer capable of displaying a straight line or a circle and changing its length or diameter.

[0002]

2. Description of the Related Art A laser pointer is considered to be used for displaying a predetermined position by projecting a laser beam from a semiconductor laser by an optical system (lens) into a light beam and projecting it onto a projection surface. There is. Generally, a continuous light beam is projected on a projection surface such as a screen to display one spot as a spot.

Displaying simple figures such as lines and circles using this laser pointer has been considered. For that purpose, it is necessary to change the direction of the light beam to a predetermined direction and distance and repeat this in a short time.

As described above, in order to repeat the direction of the light beam in a short time and change its direction, a method of moving the reflection mirror is general. That is, the reflecting mirror has a movable structure, and the reflecting mirror is repeatedly swung. FIG. 4 is an explanatory view of such a laser pointer, in which the laser light of the semiconductor laser 40 is reflected by the reflection mirrors 41 and 42 to irradiate a light beam in a predetermined direction. One of the reflection mirrors is tilted. For example, the irradiation direction of the light beam can be changed.

It has been considered to use a small motor as means for changing the direction of the light beam by moving the reflecting mirror, but in order to obtain a small device with low power consumption,
The use of piezoelectric bimorphs has been considered. It is possible to illuminate a straight line by moving one reflecting mirror by one piezoelectric bimorph, and a circle by moving both piezoelectric bimorphs in different directions by two piezoelectric bimorphs.

[0006]

When using such a laser pointer, it is desirable that the length of the line is variable if it is a straight line and the diameter of the circle is variable if it is a circle. For that purpose, it is necessary to adjust the voltage for driving the piezoelectric bimorph.

When the laser pointer is used, it is dangerous if the laser beam directly reaches the eyes. Therefore, it is desirable that the switch be opened when the laser pointer is not used. For example, the operation is such that irradiation is performed only while the pressing is performed, and cutting is performed when the pressing is released.

The present invention provides a laser pointer which satisfies the above two requirements.

[0009]

According to the present invention, by using a manipulating device in which a volume for adjusting a bimorph drive voltage and a switch for turning on and off are arranged in close proximity to each other and are operated simultaneously by the movement of a finger of one hand. To solve the problem of.

That is, the laser beam is condensed by an optical system into a light beam, and the light beam is reflected by a reflecting mirror that repeatedly oscillates by a piezoelectric bimorph and irradiated on a projection surface to display a predetermined figure. The pointer is characterized in that the blinking of the laser light and the control of the driving voltage of the piezoelectric bimorph are performed by the two variable resistors arranged close to each other.

More specifically, a laser beam is condensed by an optical system to form a light beam, and the light beam is reflected by a reflecting mirror repeatedly oscillated by a piezoelectric bimorph to irradiate the projection surface with a predetermined figure. In the laser pointer displaying, the blinking of the laser beam and the control of the driving voltage of the piezoelectric bimorph are performed by the operation of two variable resistors that are placed close to each other. The variable resistors are composed of two sets of conductor patterns having different resistance values, which are formed so as to face each other on the surface of a flexible sheet which is spaced by a spacer, and which face each other by pressing the sheet. It is characterized in that the conductor patterns are supported so as to be in contact with each other.

[0012]

[Function] One of the conductor patterns of the membrane structure can be used as a variable resistor to change the driving voltage of the piezoelectric bimorph, and the other conductor pattern of low resistance can be turned on and off as a switch for emitting laser light. The low resistance conductor pattern is hardly affected by the change in the pressing position.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded plan view of a main part of an operating tool used for a laser pointer according to the present invention. It is composed of a flexible base sheet 11 and a spacer sheet 13. The base sheet 15 is partially formed with the slits 15 linearly and is bent at this portion. This slit 15
The conductor patterns 16 and 17 made up of two sets of resistors are formed so as to sandwich the resistor.

The conductor patterns 16a and 16b made of resistors are formed of low-resistance printed carbon or the like, and are formed at positions facing each other when bent. The conductor patterns 17a and 17b, which are other resistors, are formed of high-resistivity printed carbon or the like, and are formed at positions facing each other when bent similarly.

The base sheet 11 is folded along the slits 15, and the spacer sheet 13 is arranged between them. As a result, a space is provided between the conductor patterns 16a and 16b and between the conductor patterns 17a and 17b. However, since the base sheet 11 has flexibility, it can be deformed when pressed to bring the conductor patterns into contact with each other.

The two sets of conductor patterns 16 and 17 operate as variable resistors. As shown in FIG. 3, the conductor pattern 17 plays the role of the variable resistor 22 that changes the drive voltage of the piezoelectric bimorph drive circuit 21, and the switching transistor 23
The conductor pattern 16 plays the role of the variable resistor 24 for operating the. The conductor pattern 16 has a resistance value such that a minimum voltage for operating the transistor 23 can be applied. The conductor pattern 16 is used for turning the switching transistor on and off, and may be any element having a switch function.

Laser light is generated by the conductor pattern 16, and the length of laser light irradiation determines the conductor pattern.
The voltage applied by 17. Because it has high resistance,
The resistance value varies greatly depending on the contact position, and the voltage also changes accordingly to change the amplitude of the piezoelectric bimorph. The conductor pattern 16 has a relatively small change in resistance at the contact position, and a voltage that enables the transistor to operate can be obtained by pressing it at any place.

FIG. 2 is a perspective view showing an example in which the laser pointer operating instrument according to the present invention is incorporated in a laser pointer. A base sheet 31 sandwiching a spacer sheet is incorporated into the side surface of the main body of the laser pointer 30. Base sheet 31
It is connected to the circuit of the main body with the connector 32 of the cover sheet 34
To fix and protect. By pressing a portion of the cover sheet 34 to turn on the laser light by the low resistance conductor pattern 16, and moving the position in the longitudinal direction to change the position of pressing the high resistance conductor pattern 17, if it is a straight line, the irradiation length can be changed. Can be changed.

When drawing a circle or the like, it is possible to change the diameter (size) by changing the driving voltage of the piezoelectric bimorph using an instrument having the same structure.

[0021]

According to the present invention, it is possible to simultaneously turn on / off the laser light and adjust the irradiation size with one touch. Moreover, it is possible to use an apparatus in which they are integrally formed, which is excellent in operability and facilitates miniaturization.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a laser pointer driving circuit.

FIG. 4 is an explanatory view of a conventional laser pointer.

[Explanation of symbols]

 11:31: Base sheet 13: Spacer sheet 16: (Low resistance) conductor pattern 17: (High resistance) conductor pattern

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuyoshi Takano 828 Hinohara, Tamagawa-mura, Hiki-gun, Saitama Prefecture, Hinohara, Toko Co., Ltd. (72) Takahiro Ogawa, 828, Hinohara, Hinohara, Tamagawa-mura, Hiki-gun, Saitama Prefecture Toko Inc. Tamagawa factory

Claims (6)

[Claims] 1. A laser for displaying a predetermined figure by condensing a laser beam by an optical system into a light beam, reflecting the light beam by a reflecting mirror repeatedly oscillated by a piezoelectric bimorph and irradiating the projection surface. In the pointer, a laser pointer is characterized in that blinking of a laser beam and control of a driving voltage of a piezoelectric bimorph are controlled by two variable resistors arranged close to each other. 2. A laser beam is condensed by an optical system to form a light beam, and the light beam is reflected by a reflecting mirror that repeatedly oscillates by a piezoelectric bimorph to irradiate the projection surface with a straight line of a predetermined length. In the laser pointer to be displayed, the length of a straight line is made variable by controlling blinking of a laser beam and control of a driving voltage of a piezoelectric bimorph by two variable resistors arranged close to each other. 3. A laser beam is condensed by an optical system to form a light beam, and the light beam is reflected by a reflecting mirror that repeatedly oscillates by a piezoelectric bimorph and irradiated on a projection surface, whereby a circle or an ellipse having a predetermined diameter is obtained. In the laser pointer that displays, the laser pointer blinks by two variable resistors arranged close to each other, and the diameter of a circle or an ellipse is made variable by controlling the driving voltage of the piezoelectric bimorph. . 4. A laser for displaying a predetermined figure by converging a laser beam into an optical beam by an optical system, reflecting the optical beam by a reflecting mirror that repeatedly oscillates by a piezoelectric bimorph, and irradiating the projection surface. In the pointer, two variable resistors formed integrally control the blinking of laser light and the drive voltage of the piezoelectric bimorph, and these variable resistors are the surface of a flexible sheet that is spaced by a spacer. In the laser pointer, the two conductor patterns having different resistance values are formed so as to face each other, and the conductor patterns facing each other are supported by pressure contact of the sheet so that the conductor patterns can contact each other. 5. A laser for displaying a predetermined figure by converging laser light into an optical beam by an optical system, reflecting the optical beam by a reflecting mirror that repeatedly oscillates by a piezoelectric bimorph, and irradiating the projection surface. In the pointer, the two variable resistors, low resistance and high resistance, which are integrally formed, blink the laser light and control the drive voltage of the piezoelectric bimorph, and these variable resistors are flexibly arranged at intervals by a spacer. Consisting of two sets of conductor patterns with different resistance values, which are formed to face each other, on the surface of a sheet having high resistance, the laser light is turned on by the pressure contact of the low resistance conductor pattern and the piezoelectric by the pressure contact of the high resistance conductor pattern. The conductive patterns facing each other are supported so as to be in contact with each other so as to control the drive voltage of the bimorph. The pointer. 6. The laser pointer according to claim 4 or 5, wherein two variable resistance conductor patterns are formed in parallel.