JP2009236744A - Laser marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser marking device for enhancing an impact resistant property without increasing a height of a case while preventing the number of components from being increased. <P>SOLUTION: The laser marking device includes a laser light source for radiating a laser beam in a vertical or horizontal direction disposed in a case 1. The laser marking device includes a protection member 3 made of an elastomer that covers over an upper portion of an outer surface of the case 1 and a part of a circumference wall evaginated from the upper portion. The protection member 3 is evaginated such that the protection member is gradually separated from the circumference wall of the case 1 as it goes downward from a boundary between the upper portion and the circumference wall of the case 1 as a start point, and the lower end is in contact with the circumference wall. A space is formed between the evaginated portion and the external face of the circumference wall. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laser marking device, and more particularly to an impact resistant structure of a laser marking device.

  One of the work at the construction site is the ink marking work that sets the standard of verticality and horizontality when constructing pillars and walls. As a device used for inking work, a laser inking device using laser light is known.

  A laser marking device converts a laser beam emitted from a semiconductor laser into a parallel beam by a collimator lens and diffuses the parallel beam in only one direction by passing through a cylindrical rod lens, so that a wall, ceiling, floor, etc. It can irradiate as a bright line of a vertical direction and a horizontal direction. In this case, the bright lines in the vertical direction and the horizontal direction are determined by the direction of the central axis of the rod lens arranged on the optical path from the semiconductor laser. The rod lens of the light source unit that irradiates the vertical bright line is set with its central axis oriented horizontally, and the rod lens of the light source unit that irradiates the horizontal bright line is set with its central axis oriented vertically. .

  In the laser marking device, a pendulum supporting a laser light source unit containing the above laser light source and each optical element is suspended by a gimbal mechanism or a gyro mechanism. The pendulum suspended by the gimbal mechanism or gyro mechanism is always maintained in a predetermined vertical position even if the installation surface of the ink discharger is tilted. Or a bright line in the horizontal direction can be projected. In order to project vertical or horizontal bright lines with high accuracy, it is necessary to reduce the mechanical resistance of the bearing portion of the gimbal mechanism or gyro mechanism as much as possible, and extremely delicate bearing parts are used.

  By the way, a laser marking device is often used violently under severe conditions in a construction site or the like, and often receives an impact force from the outside due to dropping or falling. If the gimbal mechanism or the gyro mechanism is greatly damaged by the impact force, the mechanical resistance of the gimbal mechanism or the gyro mechanism is increased, and the pendulum cannot be stopped at the normal position. As a result, accurate ink marking cannot be performed. Therefore, even if an impact is applied to the ink discharger from the outside, it is required to have an impact resistant structure that weakens the impact force applied to the gimbal mechanism and the gyro mechanism. As one of the impact resistant structures, it is conceivable to make the entire inking device sturdy, but with such a structure, it is not possible to obtain a highly accurate inking device, and the cost also increases.

  Therefore, in a conventional laser marking device, a damping member is provided between a casing or case that covers the main components such as a laser light source unit, a laser unit holder, that is, a pendulum, and a gimbal mechanism, and a support base that supports the gimbal mechanism. There has been proposed a structure in which the support base is coupled to the base by an impact blocking structure (see, for example, Patent Document 1). Alternatively, when a metal handle is rotatably supported on the battery housing portion protruding from the side surface portion of the main body case, and the handle is rotated to the opposite side to the support portion, the handle holding portion is There has been proposed a configuration in which both side pieces of the handle are bent so as to approach the upper surface, and an impact is received by a part of the handle when dropped or falls (see, for example, Patent Document 2). In addition, a cap made of an elastic material such as rubber is fitted on the outer periphery of the upper part of the housing (case). The cap has a plurality of horizontal stripe-like projections surrounding the entire periphery of the housing and protrudes outside the outer periphery of the housing. Thus, a configuration has been proposed in which the housing is protected during a fall (see, for example, Patent Document 3).

JP-A-2005-300406 JP-A-2005-181200 JP 2002-71350 A

  In the configuration disclosed in Patent Document 1, it is possible to obtain a certain level of impact resistance, but there is a difficulty in requiring many buffer members. The configuration described in Patent Document 2 cannot obtain sufficient performance as a buffer structure for a laser marking device. In other words, when the ink drop device falls or falls, the impact force is not always applied to the handle first, and even if the impact force is first applied to the handle, the metal handle has sufficient impact resistance. Can not demonstrate. According to the invention described in Patent Document 3, since the cushioning effect cannot be obtained unless the outer periphery of the case is covered with an elastic body and the horizontal stripe-shaped projections protrude largely outward in the radial direction, the sumi appearance device becomes bulky. There is a difficulty. Further, only the protrusions contribute to buffering, and no device for buffering is made other than the protrusions.

  An object of the present invention is to provide a laser marking device in which the case is not bulky and the impact resistance performance can be improved while preventing an increase in the number of parts in view of the problems in the conventional laser marking device.

  The present invention relates to a laser marking device provided with a laser light source capable of irradiating a laser beam in a vertical direction or a horizontal direction inside a case, and an upper part of an outer surface of the case and a part of a peripheral wall continuous to the upper part. The protective member is made of an elastomer covered over, and the protective member bulges away from the peripheral wall as it goes downward starting from the boundary between the upper part of the case and the peripheral wall, and the lower end of the protective member extends to the peripheral wall. The most important feature is that a space is provided between the bulging portion and the outer surface of the peripheral wall.

  The space portion located between the bulging portion of the protective member and the peripheral wall surface of the case is a closed space when the lower end edge of the protective member is in contact with the side surface of the case. Good.

More preferably, the space is filled with a gel-like shock absorbing material.
A rubber-like elastic body may be used as the protective member.

  According to the present invention, between the protective member and the peripheral wall of the case, a space is provided between a portion where the part of the protective member bulges away from the peripheral wall and the outer surface of the peripheral wall. Therefore, it is possible to secure a buffering property due to the elasticity of the protective member itself and to use the space portion as a buffering margin. As a result, when an impact force is applied from the outside, the protective member receives an impact before the case, and the protective member can be deformed slowly to buffer the impact, thereby directly Can be prevented from acting.

  In particular, when the space portion is a closed space, or by filling a gel-like shock absorbing member, the same result as that obtained by changing the spring constant of the protective member to increase the shock absorbing property can be obtained directly to the case. It is possible to effectively suppress the action of an impact.

  As described above, the protective member has a unique configuration that can effectively improve the impact resistance, so that it is not necessary to project the protective member to the outside of the case, and the laser marking device becomes bulky. You can avoid that.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing an example of a case used in a laser marking device according to the present invention.

  In FIG. 1, a case 1 is a member that is integrated in a state where it is covered with a base 2 having support legs (usually composed of three legs) as indicated by a two-dot chain line. Although not shown, the case 1 can accommodate therein a laser light source unit including a laser light source and a lens constituting an irradiation optical system, a pendulum supporting the laser light source unit, and a gimbal mechanism or a gyro mechanism for hanging the pendulum. It has become.

The case 1 constitutes an outer member having a substantially cup-shaped cross section that covers the outside of the laser light source unit, the pendulum, and the support mechanism thereof, and can be protected against dust, and is formed at the bottom of the cup-shaped cross section. The opening side is integrated with the base 2 with the corresponding part facing up.
A part of the peripheral wall 1A of the case 1 is provided with a window 1B for projecting a laser beam in the vertical direction, and a window for projecting a laser beam in the horizontal direction is formed depending on the specifications of the laser marking device. Yes.

The case 1 is provided with a protective member 3 placed on the upper side thereof.
The protection member 3 is made of a rubber-like elastic body made of an elastomer, that is, a resin, and covers the upper portion of the case 1 and a part of the peripheral wall 1A that is a side portion continuous to the upper portion of the case 1.
The protective member 3 covered from the upper part of the case 1 extends from the upper part of the case 1 to the opening end 3A of the protective member 3 along the continuous peripheral wall 1A, that is, downward from the boundary between the upper part of the case and the peripheral wall. As it goes, the shape gradually bulges outward from the outer peripheral surface of the peripheral wall 1A, and the opening edge corresponding to the end of the opening end 3A is gently bent with an obtuse angle toward the peripheral wall 1A of the case 1 from the position bulged so far. It is configured.
Thereby, the space part S is provided between the bulging part of the protection member 3 and 1 A of surrounding walls of the case 1 facing this.

The protective member 3 can swing on the opening end 3A side with the boundary between the upper portion of the case 1 and the peripheral wall 1A continuous therewith as a fulcrum. The swing direction of the protective member 3 is relative to the peripheral wall 1A of the case 1. It is the direction of contact and separation.
The swinging direction of the opening end 3A is determined when an impact is applied from the outside with the initial position being a position where the space portion S is bulged and floated so that a space S can be formed between the opening end and the outer surface of the peripheral wall 1A. This is a direction in which the bulging portion is directed toward the peripheral wall 1A, in other words, a direction in which the space S is contracted.

When the protective member 3 swings toward the peripheral wall 1 </ b> A, the space S is contracted, and the opening end 3 </ b> A of the protective member 3 is in the initial position at a position facing the opening end 3 </ b> A of the protective member 3 in the case 1. A step portion 1C that can be hooked is formed.
The protective member 3 has its opening end 3A hooked on the step 1C of the case 1, so that when the impact is applied from the outside, the opening S is contracted with the opening end edge being held on the step 1C. It can be transformed into a state.

In the configuration as described above, the protective member 3 is provided in a state of covering the upper portion of the case 1 and a part of the peripheral wall 1A continuous thereto.
FIG. 2 shows the appearance of the laser marking device 100 in this state.
In FIG. 2, since the protective member 3 is placed on the upper part of the case 1, it is as if it is a part constituting the part of the case 1, specifically, a part of the head (upper part). Appearance is given, and it gives the impression that a member different from the case 1 is present, unlike the case 1 where the upper part of the case 1 and a part of the peripheral wall continuous to the upper part of the case 1 are mounted. There is nothing. Although the protective member 3 is covered over the entire upper periphery of the case 1, a window hole for irradiating vertical bright lines may be formed in the upper portion of the case as in the embodiment shown in FIG. A window hole is also formed in the protection member 3 so as not to block the window hole.

In the embodiment configured as described above, when the laser marking device falls down, the protective member 3 comes into contact with the floor or the like before the case 1 and the impact from the outside is applied to the protective member 3. Force acts.
When an impact force acts on the protective member 3, the portion of the protective member 3 that bulges outward from the case 1 is displaced toward the peripheral wall of the case 1. At this time, the protection member 3 contracts the space S provided between the case 1 and the protection member 3 while absorbing the impact force by causing a slow deformation by its own elastic force. At this time, since the space portion S is a closed space, the internal pressure increases as the space contracts, and the buffer function increases. As a result, the impact force from the outside is consumed for the deformation of the protection member 3, and the impact on the case 1 is buffered.

In the configuration of the present embodiment, since the protective member can be attached to the case 1 simply by covering the case 1 with the protective member 3, it can be configured simultaneously with the assembly of the case 1 or as an integral part of the case 1. Therefore, it is not necessary to prepare a special shock absorbing structure for the case 1, and an increase in the number of parts can be prevented.
Moreover, it is possible to give the impression that the protective member becomes a part of the case by covering the case and making it appear as a part of the head (upper part) of the case. As a result, unlike a case where a special structure different from the case is attached to the peripheral wall of the case, it is possible to suppress an increase in the number of parts and not to give a strange impression on the design. .

  In the laser marking device according to the present invention, it is also possible to fill the space S with a gel-like shock absorbing material in order to mitigate the direct impact on the case 1. As the shock absorbing material in this case, a material capable of improving the shock absorbing performance in the space S as compared with the case of air is selected. Thereby, it is possible to efficiently prevent the direct impact on the case 1 from being applied by increasing the impact attenuation rate when an impact from the outside acts on the protective member 3.

It is sectional drawing which shows the example of the case used for the laser marking device by this invention. It is an external view of the laser marking device which mounted the said case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1A Perimeter wall 1C Step part 2 Base 3 Protection member 100 Laser marking device S Space part

Claims (3)

In a laser marking device equipped with a laser light source that can irradiate laser light vertically or horizontally in the case,
A protective member made of an elastomer over the upper part of the outer surface of the case and a part of the peripheral wall continuous to the upper part;
The protective member bulges away from the peripheral wall as it goes downward starting from the boundary between the upper part of the case and the peripheral wall, and a lower end abuts the peripheral wall, and the bulging portion and the outer surface of the peripheral wall A laser marking device, characterized in that there is a space between them.   The space part located between the bulging part of the protection member and the peripheral wall surface of the case is a closed space when the lower end edge of the protection member contacts the side surface of the case. The laser marking device according to claim 1, wherein   The laser marking device according to claim 1 or 2, wherein the space portion is filled with a gel-like shock absorbing material.

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