AU636561B1 - - Google Patents

Description

AUSTRALIA

Patent Act 636561 PETTY PATENT SPECIFICATION

(ORIGINAL)

Class Int. Class Application Number: Lodged: Petty Patent Specification Lodged: Accepted: Published: Priority: o Related Art: Names(s) of Applicant(s): r TIEN LIN LO Address(s) of Applicant(s): No. 27, Lane 452, Chung Hsing Road Pai Yu Village, Kuan Yin Hsiang Tao Yuan Hsien, Taiwan, Republic of China Our Address for service is: PHILLIPS ORMONDE FITZPATRICK Patent and Trade Mark Attorneys 367 Collins Street MELBOURNE, Australia 3000 Petty Patent Specification for the invention entitled: STRUCTURE OF LASER POINTER The following statement is a full description of this invention, including the best method of performing it known to applicant(s): STRUCTURE OF LASER POINTER BACKGROUND OF THE INVENTION The present application is a divisional application from Australian application 28102/92, the entire disclosure of which is incorporated herein by reference.

The present invention relates to laser pointers, and more particularly, the present invention relates to a laser point which has means to change the pattern of light spot, and means to protect against error triggering.

A variety of laser light generating devices are known and used in pointing things out on a map, blackboard, etc. One disadvantage of the prior art 10 laser pointer devices is that they can only produce a fixed patter or size of light spot. Another disadvantage of the pribr art laser pointer devices is S: that there is no safe means to prevent the problem of error triggering, and therefore much electric power 15 supply is wasted.

SUMMARY OF THE INVENTION The present invention has been accomplished to eliminate the aforesaid disadvantages. It is therefore an object of the present invention to provide a laser pointer which can be adjusted to change the size and pattern of.. the light spot produced thereby. It is another object of the present invention to provide a laser pointer which has means to prevent error triggering. According to one aspect of the present invention, a laser pointer is generally comprised of a projector, a light spot controller, a base, a telescopic stick, a telescopic stick supporting spring plate, a concealed microphone, a laser light generating PC board, a sliding switch knob, an upper cover, a switching control spring plate, a switch control hook, and a 10 witch, wherein rotating the projector causes the light e00o spot control to be moved leftward or rightward permitting a small or big projecting hole thereon to be aligned the said projector, according to the desired size of light spot, for passing a laser light beam produced by the laser light generating PC Board.

"According to another aspect of the present invention, the small and big projecting holes on the light spot controller can be respectively made in any of a variety coo0 eeo. of shapes. According to still another aspect of the 20 present invention, the switching control spring plate keeps the switch to be maintained off before pressing down the sliding switch knob, so as to prevent error triggering.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of a- laser pointer embodying the present invention; Fig. 2 is an exploded view of the upper cover; Fig. 3 is an elevational view of the laser pointer of Fig. 1; Fig. 4A is a partly sectional view showing that rotating the projector causes the light spot controller to be moved leftward or rightward permitting the small or big projecting hole to be in line with the projector for passing a laser light beam; Figs. 4B and 4C are partly sectional views showing the operation of the sliding switch knob in switching on/off the switch; and SFig. 9 illustrates the use of the present invention in projecting a light spot on a board for o I the purpose of pointing things.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 20 Referring to Fig. 1, a laser pointer as constructed in accordance with the present invention is generally comprised of a projector 1, a light spot controller 2, a base 3, a telescopic stick 4, a telescopic stick supporting spring plate 5, a concealed microphone 6, a laser light generating PC board 7, a sliding switch knob 8, an upper cover 9, an U-shaped spring plate 10, a switch control hook 11, and a switch 12.

The projector 1 has a hole 1111 through the central axis thereof for passing laser light beam, an annular groove 1112 around the peripheral wall thereof, and an extension rod 1113 longitudinally projecting from the back end thereof for connection to the base 3.

•coo 10 The light spot controller 2 comprises a tapered big projecting hole 21, a tapered small projecting hole 22, two spaced rails 23 on the front face thereof defining a limited space 231 for moving the extension rod 1113, and a notch 24 and a raised portion 25 on the bottom edge thereof for positioning.

.l The base 3 comprises a semicircular front

*SSS

support 31, on to which the annular groove 1112 of the projector 1 is seated, a front chamber 311, in which the light spot control 2 is moved by rotating the projector i, a side chamber 33, which receives the telescopic stick 4, an intermediate chamber, which receives the PC Board, a battery chamber 34 behind the intermediate chamber 322, which receives a dry battery set, front and rear hooks 35,36 at two opposite ends, which hook up the upper cover 9, a semicircular rear support 331 in the side chamber 331 adjacent to the rear end of the battery chamber 34 to support the rear end of the telescopic stick 4, a rear chamber 333, which receives the concealed microphone 6, and a hole 332 on the inside adjacent to the rear end thereof, which receives the spring plate oelo ocoo The telescopic stick 4 has an annular groove 41 around the peripheral wall adjacent to the rear end thereof, which is retained at the semicircular rear support 331 inside the base 3. When electricity is 15 disconnected, the telescopic stick 4 is used as a Spointer. Furthermore, the arrangement of the telescopic stick 4 simultaneously improves positive signal transmission from the concealed microphone.

The telescopic stick supporting spring plate 5 is fastened in the hole 332 with a contact flange 51 thereof stopped against the rear end of the telescopic stick 4.

The concealed microphone 6 is received inside the rear chamber 333. When pointing things out on a map, blackboard, etc. the use's speech is delivered through the concealed microphone 6.

The laser light generating PC Board 7 is fastened inside the intermediate chamber 32, and comprised of a laser diode and a trigger circuit (not shown).

oooo 'The upper cover 9 comprises an endless groove 91 around a through hole 911, into which the sliding switch knob 8 is fastened, an U-shaped rail 92 raising from the bottom edge thereof, two raised portions 93,931 on the bottom edge thereof with a gap 94 defined between the U-shaped rail 92, a semicircular inner flange 95 on the front end thereof, which matches with the e• ""semicircular front support 31 to hold the projector 1, and front and rear hooks 96,97 respectively hooked up with the front and rear hooks 35,36 of the base 3.

The U-shaped spring plate 10 has a notch 101 to hold the sliding switch knob 8, and is set inside the U-shaped rail 92 on the bottom edge of the upper cover 9 to give a spring force to the switch control hook 11.

The switch control hook 11 has two holes 111,112 aligned into a stepped hole, a sloping front edge 113, and two symmetrical rear extension rods 114.

The two symmetrical rear extension rods 114 are terminated into two hooked portions 115 which are moved to hook in or release from the gap 94 between the raised portions 93,931 and the U-shaped rail 92 in switching on/off the switch 12.

The sliding switch knob 8 has an embossed top surface 84 for positive contact of the fingers, and a split bottom rod 81 inserted in the 112. The split bottom rod 81 has an annular groove 81 around the peripheral wall thereof, onto which the U-shaped spring plate 10 is fastened, and a notch 811 on the tapered S" bottom end 82 thereof.

The switch 12 has a contact stub rod 121 inserted into the hole 111 and moved to electrically connect or disconnect the electric circuit of the PC Board 7 by means of the control of the switch knob 8.

Referring to Fig. 3 A, rotating the projector 1 causes the extension rod 1113 to move the light spot control 2 in the front chamber 311, permitting the laser light beam from the laser diode of the PC Board 7 to be projected through the projector 1 via the big projecting hole 21 or the small projecting hole 22.

Referring to Figs. 3B and 3C, moving the sliding switch knob 8 forwards causes the front sloping edge 113 of the switch control hook 11 to press against 10 the U-shaped spring plate 10, permitting the contact stub rod 121 of the switch 12 to be pressed by the split bottom rod 81 in connecting the electric circuit of the PC Board 7; releasing the sliding switch knob 8 causes the switch 12 to electrically switching off the electric 15 circuit of the PC Board 7, and therefore the sliding switch knob 8 can be moved back into its original "Off" position with the hooked portions 115 thereof respectively hooked in the gap 94. Because of the *arrangement of the U-shaped spring plate 10, positive 20 switching operation is ensured.

Claims (2)

1. A laser pointer comprised of a projector, a light spot controller, a base, a telescopic stick, a telescopic stick supporting spring plate, a concealed microphone, a laser light generating PC board, a sliding switch knob, an upper cover, a switching control spring plate, a switch control hook, and a switch, wherein: said projector has a hole through the central axis thereof for the passing therethrough of laser light beam, an annular groove around a peripheral wall thereof, and an extension rod longitudinally projecting from a back end thereof; said light spot controller comprises a big projecting hole and a small projecting hole for passing laser light beam alternatively, two spaced rails on a front face thereof defining a limited space for moving the extension rod of said projector, a notch and a raised portion on a bottom edge thereof for positioning; said base comprises a semicircular front 20 support on to which the annular groove of said projector is seated, a front chamber into which said light spot control is moved by rotating said projector, a side chamber which receives said telescopic stick, an intermediate chamber which receives said PC Board, a battery chamber- which receives a dry battery set, front and rear hooks at two opposite ends which hook up said upper cover, a semicircular rear support in said side chamber to retain said telescopic stick in said side chamber, a rear chamber which receives said concealed microphone, and a hole on the inside in which said telescopic stick supporting spring plate is fastened to stop against said telescopic stick; said telescopic stick has an annular groove which is retained at the semicircular rear support of said base; said laser light generating PC Board is fastened inside the intermediate chamber of said base, and comprised of a laser diode and a trigger circuit and controlled by said switch to project a laser light beam 15 projecting through said projector via said big projecting hole or said small projecting hole; said upper cover comprises an endless groove around a through hole into which said sliding switch knob is movably fastened, an U-shaped rail raising from 20 a bottom edge thereof, two raised portions on the bottom edge thereof with a gap defined between said U-shaped rail, a semicircular inner flange on a front end thereof which matches with the semicircular front support of said base to hold said projector, and front and rear hooks respectively hooked up with the front and rear hooks of said base; said switch control spring plate is set inside the U-shaped rail of said upper cover to give a spring force to said switch control hook, and has a notch to hold said sliding switch knob; said switch control hook has a first fastening hole and a second fastening hole aligned into a stepped hole, a sloping front edge, and two symmetrical rear extension rods, said two symmetrical rear extension rods being terminated into two hooked portions which are moved to hook in or release from the gap between the raised portions and the U-shaped rail of said upper cover in switching on/off said switch; said sliding switch knob has an embossed top surface for positive contact of the fingers, and a split CC-C C*' bottom rod inserted in said second fastening hole of said switch control hook, said split bottom rod having an annular groove around a peripheral wall thereof, onto which said U-shaped spring plate is fastened, and a notch on a tapered bottom end thereof; said switch has a contact stub rod inserted into said first fastening hole and moved to electrically connect or disconnect the electric circuit of said PC Board by means of the control of said switch knob.

2. The laser pointer of claim 1, wherein said big projecting hole and said small projecting hole of said spot light controller can be made in any of a variety of shapes. DATED: 9 February 1993 PHILLIPS ORMONDE FITZPATRICK Attorneys for: TIEN LIN LO -04.a 1 4A 0sees