JP4198018B2 - Laser line marker - Google Patents

Description

  The present invention relates to a laser line marker that includes a laser emitting unit on a pendulum body that is swingably suspended on a support by a gyro mechanism, and emits visible laser light that is linear in the horizontal direction and / or the vertical direction.

  A laser line marker that emits a linear visible laser beam in a horizontal direction and / or a vertical direction in order to accurately measure a horizontal direction and / or a vertical direction is known in the construction and housing related sectors.

Such a laser line marker is generally equipped with a laser emitting unit that suspends a pendulum body swingably on a support base by a gyro mechanism using a gimbal support system, and emits a linear visible laser beam to the pendulum body. Thus, the object is marked with a linear visible laser beam in the horizontal direction and / or the vertical direction (see Patent Document 1).
Registered Utility Model No. 3030154

  As described above, in the laser line marker using the gyro mechanism, the posture of the pendulum body is held with high sensitivity to the tilt, and the emitted linear visible laser light is held in the horizontal direction and / or the vertical direction. Although it is possible, on the other hand, because of its high sensitivity, there is a problem that it is vulnerable to impact.

  By the way, the laser line marker is provided with a lock mechanism for fixing the pendulum body to the support base for the purpose of protecting the pendulum body when not in use. This locking mechanism is constituted by a stopper that is displaced so as to restrict the displacement of the pendulum body by operating a lever or the like, for example, and when not in use, the stopper is displaced to a lock position that restricts the displacement of the pendulum body.

  However, since the stopper restricts the displacement of the pendulum body by an operation when not in use, it is not useful when an impact is applied during use.

  According to the present invention, a lock member provided on a support base that can be displaced between a lock position for restricting swinging of the pendulum body and an unlocked position for releasing the restriction holds a displacement state by a drive source, and The drive source is controlled in accordance with an impact signal from an impact sensor that generates an impact signal corresponding to the intensity of the applied impact, and when the impact signal reaches or exceeds a preset reference value level The drive source is controlled to displace the lock member to the lock position.

  The laser line marker of the present invention is used because the lock member is displaced to the lock position and the swing of the pendulum body is limited when the impact signal generated from the impact sensor reaches a preset reference value level or higher. When the pendulum body is swingable, the pendulum body is prevented from being vigorously shaken to the mechanical limit by an impact, and damage to the pendulum body, particularly high-precision gyro mechanism and laser emission unit is prevented. be able to.

  In this case, not only the swinging of the pendulum body is restricted, but also the driving of the laser light source of the laser emitting unit is stopped, so that the laser emission is stopped at the time of impact.

  In addition, the locking member used to regulate the displacement of the pendulum body when not in use is also used to regulate the displacement of the pendulum body when an impact is applied during use, thereby suppressing an increase in the number of parts. Can be a reasonable configuration.

  FIG. 1 is a perspective view showing an overall image of a laser line marker of the present invention. Reference numeral 1 denotes a support base. Reference numeral 2 denotes a pendulum body suspended swingably on the support base 1 by a gimbal type gyro mechanism. A yoke 3 having a U-shaped cross section to which the magnets arranged to face each other are attached to the support base 1 is installed below the left and right side walls, and the tongue 4 of the iron plate provided on the pendulum body 2 It is arranged between each magnet. As a result, an eddy current is generated in the tongue piece 4 in accordance with the swing of the pendulum body 2, and the pendulum body 2 is braked.

  Reference numeral 5 denotes a laser emission unit incorporated in the pendulum body 2. As shown in the partial cross-sectional view of FIG. 2, the laser emitting unit 5 includes a laser diode 6 as a laser light source, a collimator lens 7 that collimates the laser beam of diffused light emitted from the laser diode 6, and the collimator lens. And a cylindrical cylindrical lens 8 that spreads a parallel laser beam through 7 in one horizontal direction.

  Reference numeral 9 denotes a pedestal composed of a donut-shaped steel plate to which the support base 1 is fixed. On this pedestal 9, a lock mechanism that selectively restricts the swinging of the pendulum body 2 is installed as shown in a developed perspective view in FIG.

  4 and 5 are plan views of the lock mechanism assembled. FIG. 4 shows an unlocked state in which the swing of the pendulum body 2 is not restricted by the lock mechanism, and FIG. 5 shows a locked state in which the swing of the pendulum body 2 is restricted by the lock mechanism.

  The lock mechanism is assembled on a synthetic resin chassis 10 that is overlaid on the pedestal 9. The chassis 10 is integrally formed with various protrusions that support the components that constitute the lock mechanism, and the rotating shaft. Each pin is attached by press fitting.

  On the chassis 10, an on switch 11 operated at the start of use and an off switch 12 operated at the end of use are fixed by soldering, and an impact signal corresponding to the strength of the impact is generated by detecting the impact. The printed circuit board 14 to which the impact sensor 13 is fixed by soldering is fixed with screws.

  The switch lever 15 formed with the pressing portion 15a for pressing the knob of the on switch 11 and the pressing portion 15b for pressing the knob of the off switch 12 is pivotally supported by the pin 16 press-fitted onto the chassis 10. A clockwise rotational force is applied by the spring 17.

  The switch lever 15 is axially supported by the pin 16 coaxially with the switch lever 15 and is displaced in the clockwise direction by the restricting piece 19a of the auxiliary lever 19 to which the counterclockwise rotational force is applied by the spring 18. The position of the switch lever 15 is restricted in correspondence with the position where the auxiliary lever 19 is restricted by being brought into contact with a protrusion 20 formed integrally with the chassis 10.

A lock lever 21 having an abutting portion 21 a that abuts on the lowermost end portion 2 a of the pendulum body 2 is coaxially supported by the pin 16 on the same axis as the switch lever 15 and is given a clockwise rotational force by a spring 22. The position of the pin 23 is press-fitted on the switch lever 15 and is regulated.

  The trigger operating lever 25 pivotally supported on the rotating shaft 24 press-fitted onto the chassis 10 is given a counterclockwise rotational force by a spring 26, and the trigger operating lever 25 has an edge of a hole 27 formed in the chassis 10. The position is regulated by engaging the bent piece 25a. A movable tip 32 a of a solenoid 32 is engaged with one end of the trigger operating lever 25.

  The trigger lever 28 that is pivotally supported on the rotation shaft 24 on the chassis 10 coaxially with the trigger operation lever 25 is given a clockwise rotational force by a spring 29, and the protrusion 28 a of the trigger lever 28 is formed on the edge of the trigger operation lever 25. Is restricted by being engaged.

  The slider 30 is installed so as to be able to reciprocate on the chassis 10 by inserting each protrusion formed integrally on the chassis 10 into each hole 30 a formed in the slider 30, and from the trigger operating lever 25 by the spring 31. It is displaced to the movable limit position in the direction of leaving.

  The lock mechanism configured as described above is held in an unlocked state by a solenoid 32, and the solenoid 32 is controlled by a circuit shown in the circuit block diagram of FIG.

  In FIG. 6, the DC voltage supplied from the battery 50 is converted into a predetermined DC voltage by the DC / DC converter 51 and supplied to the control circuit 52. The control circuit 52 controls a laser driving circuit 54 that drives the laser diode 53 (corresponding to the laser diode 6) so that the laser diode 53 is driven with a driving pulse having an appropriate intensity and pulse width.

  The control circuit 52 controls the laser drive circuit 54 according to the comparison circuit 55 and the on switch 56 (corresponding to the on switch 11). When the on switch 56 is closed and the power supply voltage + B is applied to the control circuit 52 Then, the laser driving circuit 54 is operated to supply a driving pulse to the laser diode 53.

  On the other hand, when the off switch 57 (corresponding to the off switch 12) is closed, the comparison circuit 55 compares the power supply voltage + B applied via the off switch 57 with the reference voltage Vref and the off switch 57 is closed. The detection output is applied to the control circuit 52 in response to this detection. Then, the control circuit 52 ends the operation of the laser drive circuit 54 so as to stop the drive pulse supplied to the laser diode 53.

  The control circuit 52 controls excitation of a solenoid 58 (corresponding to the solenoid 32), and the control of the solenoid 58 corresponds to the control of the laser diode 53.

  That is, when the ON switch 56 is closed and the driving of the laser diode 53 is started, the solenoid 58 is controlled to be excited. On the other hand, when the OFF switch 57 is closed and the driving of the laser diode 53 is ended. The solenoid 58 is controlled to be de-energized.

The comparison circuit 55 is supplied with an impact signal from an impact sensor 59 that generates an impact signal corresponding to the strength of the impact. When the impact signal is equal to or higher than the reference voltage Vref, the comparison circuit 55 closes the off switch 57. The same detection signal as that applied is applied to the control circuit 52. Therefore, also in this case, the control circuit 52 performs control so that the excitation of the solenoid 58 is released.

  Next, each operation state of the lock mechanism will be described.

  At the start of use, the operation piece 15c of the switch lever 15 is operated to rotate the switch lever 15 counterclockwise as shown in FIG. Then, the ON switch 11 is pressed by the pressing portion 15a, and the lock lever 21 is also rotated counterclockwise by the pin 23 on the switch lever 15. At the same time, the slider 30 is pressed, the trigger operating lever 25 is rotated clockwise, the movable chip 32a of the solenoid 32 is pressed, and the movable chip 32a of the solenoid 32 is attracted by the excitation of the solenoid 32 when the on switch 11 is turned on. Held in position.

  Further, when the trigger operating lever 25 is rotated clockwise, the trigger lever 28 is rotated clockwise, whereby the lock lever 21 is rotated counterclockwise with the claw portion of the trigger lever 28 engaged. It is kept in the state that was done.

  Therefore, as shown in FIG. 4, the contact portion 21 a of the lock lever 21 is separated from the lowermost end portion 2 a of the pendulum body 2, so that the swinging of the pendulum body 2 is not restricted.

  When the operating piece 15c of the switch lever 15 is released, the switch lever 15 is rotated clockwise by the spring 17 and returned to the position where it abuts on the regulating piece 19a of the auxiliary lever 19, as shown in FIG.

  At the end of use, the switch lever 15 is rotated clockwise by the operation piece 15c of the switch lever 15. Then, the off switch 12 is pressed by the pressing portion 15b, the excitation of the solenoid 32 is released, and the attracted state of the movable chip 32a of the solenoid 32 is released. Therefore, the trigger operating lever 25 is rotated counterclockwise by the urging force of the spring 26, and at the same time, the trigger lever 28 is also rotated counterclockwise, whereby the engagement between the trigger lever 28 and the lock lever 21 is released. The lock lever 21 is rotated clockwise by the biasing force of the spring 22.

  Therefore, as shown in FIG. 5, the contact portion 21a of the lock lever 21 is brought into contact with the lowermost end portion 2a of the pendulum body 2 so that the swing state of the pendulum body 2 is restricted.

  On the other hand, when the lock mechanism is used in the state shown in FIG. 4, when an impact is applied, an impact signal corresponding to the strength of the impact is output from the impact sensor 59 (or 13). Therefore, when the impact signal is equal to or higher than the reference voltage Vref, the same detection signal as that when the off switch 57 (or 12) is closed is applied to the control circuit 52. Therefore, also at this time, the control circuit 52 performs control so that the excitation of the solenoid 58 (or 32) is released.

  Therefore, when an impact exceeding a predetermined level is applied, the excitation of the solenoid 32 is released in the same manner as when the off switch 57 (or 12) is closed, and the trigger lever 28 and the lock lever 21 are disengaged. The lock lever 21 is rotated clockwise, and as a result, the lock lever 21 is locked to limit the swing of the pendulum body 2.

It is a perspective view which shows the whole image of the laser line marker of this invention. 2 is a partial cross-sectional view of a laser emission unit 5. FIG. It is an expansion | deployment perspective view which shows the locking mechanism of the principal part of the laser line marker of this invention. It is a top view which shows the non-locking state of a locking mechanism. It is a top view which shows the locked state of a locking mechanism. It is a circuit block diagram which shows the control system of the solenoid which is a drive source of a locking mechanism. It is a top view explaining the state of the lock mechanism in the operation state at the time of a use start.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support stand 2 Pendulum body 5 Laser emission unit 11 On switch 12 Off switch 13 Impact sensor 15 Switch lever 21 Lock lever 32 Solenoid

Claims (4)

A laser line that emits a linear visible laser beam in a horizontal direction and / or a vertical direction with a laser emitting unit that emits a linear visible laser beam on a pendulum body suspended swingably on a support base by a gyro mechanism The marker includes a lock member that can be displaced between a lock position that restricts swinging of the pendulum body and an unlocked position that releases the limit, and is installed on a support base to selectively swing the pendulum body. A lock mechanism for limiting, a drive source for maintaining the displacement state of the lock member, an impact sensor for generating an impact signal corresponding to the intensity of the impact applied to the support base, and an impact signal from the impact sensor A control circuit for controlling the drive source, and the control circuit when the impact signal from the impact sensor reaches a preset reference value level or higher. Laser line marker, characterized in that by controlling the drive source and so as to displace the locking member into the locking position by. The control circuit controls the drive source by operating an operation switch operated at the start of use and at the end of use, and the control circuit outputs a control signal for controlling the operation of the drive circuit that drives the laser light source of the laser emission unit. The laser line marker according to claim 1, wherein the laser line marker is generated. The drive source is a solenoid, and the solenoid is released from an excited state by operating an operation switch at the end of use, and a force that displaces the movable part of the solenoid by releasing the excited state is transmitted to a lock member by a lock mechanism. The laser line marker according to claim 2, wherein the laser line marker is applied to displace the lock member to a lock position. The lock member is pressed by operating the operation switch to be used, the pressure is transmitted by the lock mechanism, applied to the movable part of the solenoid, and the movable part is displaced to assist the solenoid to be excited. The laser line marker according to claim 3, wherein