US20070289513A1 - Adjusting structure of a laser indicator of a sawing machine - Google Patents

Abstract

A laser indicator is secured on a rotating shaft of a sawing machine, on which rotating shaft a saw is fitted; the laser indicator includes a base, a circuit board, a laser module connected to the circuit board, a vibrating switch, an elastic piece, a battery set, a covering member over the base, and threaded element; the elastic piece is secured to the base at one end while the laser module is fitted on the elastic piece; the covering member has a screw hole, and a through hole facing the laser module for allowing a laser beam to pass through; the threaded element is passed through the screw hole of the covering member and pressed against the elastic piece; thus, the orientation of the laser module can be adjusted for the laser beam to head towards the same direction as the saw blade by means of turning the threaded element.

Description

BACKGROUND OF THE INVENTION
• 1. Field of the Invention
• The present invention relates to an adjusting structure of a laser indicator of a sawing machine, more particularly one, which allows position of the laser module to be adjusted such that a laser beam emitted from the laser module will head in a correct direction, i.e. towards the same direction as the saw blade of the sawing machine.
• 2. Brief Description of the Prior Art
• Cutting machines and sawing machines are usually equipped with a laser indicator, which emits a laser beam for marking the portion of a work piece to be cut/sawed such that a cutting/sawing process can be carried out accurately.
• A conventional laser indicator is fitted on a rotating shaft of a sawing machine, on which a saw is secured. The laser indicator will emit a laser beam heading towards the same direction of the blade of the saw; thus, it is ensured that the saw blade will cut that portion of a work piece that is marked by the laser beam after the rotating shaft starts rotating. In other words, a sawing process can be carried out accurately owing to the laser indicator.
• However, the above-mentioned laser indicator has a disadvantage: a laser module of the above-mentioned laser indicator is fixed on a circuit board by means of solder welding therefore the orientation of the laser module can't be adjusted for changing direction of the laser beam even if the laser beam fails to head towards the same direction as the saw blade. Consequently, the whole laser indicator becomes useless, and has to be discarded, resulting in significant undesirable increase in the manufacturing cost.
SUMMARY OF THE INVENTION
• It is a main object of the invention to provide an improvement on an adjusting structure of a laser indicator of a sawing machine to overcome the above-mentioned problems. The laser indicator is securely fitted on a rotating shaft of a sawing machine, on which rotating shaft a saw is fitted. The laser indicator includes a base, a circuit board secured on the base, a laser module connected to the circuit board, a vibrating switch, an elastic piece, a battery set, a covering member positioned over the base, and threaded element. The elastic piece is secured to the base at one end while the laser module is fitted on the elastic piece. The covering member has a screw hole, and a through hole facing the laser module for allowing a laser beam emitted from the laser module to pass through. The threaded element is passed through the screw hole of the covering member and pressed against the elastic piece; thus, the orientation of the laser module can be adjusted for the laser beam to head towards exactly the same direction as the saw blade by means of turning the threaded element.
BRIEF DESCRIPTION OF THE DRAWINGS
• The present invention will be better understood by referring to the accompanying drawings, wherein:
• FIG. 1 is a sectional view of the present invention,
• FIG. 2 is an exploded perspective view of the present invention,
• FIG. 3 is a perspective view of the present invention (1),
• FIG. 4 is a perspective view of the present invention (2),
• FIG. 5 is a perspective view of the present invention (3),
• FIG. 6 is a top view of the present invention,
• FIG. 7 is a bottom view of the present invention,
• FIG. 8 is a view of the present invention in use (1),
• FIG. 9 is a view of the present invention in use (2),
• FIG. 10 is a view of the present invention in use (3), and
• FIG. 11 is a top view of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
• FIGS. 1 to 7 show a first preferred embodiment of alaser indicator1 in the present invention, which is securely fitted on a rotatingshaft21 of asawing machine2, and includes abase11, acircuit board12, alaser module13, a vibratingswitch14, amanual switch15, a coveringmember16, abattery set17, and anelastic piece19. Thesawing machine2 further has a saw secured on the rotatingshaft21.
• Thecircuit board12 is secured on thebase11. Thelaser module13 is connected to thecircuit board11 while both thevibrating switch14 and themanual switch15 are fitted on thecircuit board12. The coveringmember16 is positioned over thebase11, and it consists of afront covering part161, and arear covering part162. The front and the rear coveringparts161 and162 haveseveral fasteners163, and fasteningholes164 thereon, and they are coupled together with thefasteners163 being fitted in thefastening holes164. Thebattery set17 are secured to an inner side of therear covering part162, and they have connectinglegs171, which touch thecircuit board12 such that the battery set17, thelaser module13, thevibrating switch14, and themanual switch15 together comprise a circuit. The front coveringpart161 has a throughhole165 on a circumferential side thereof, which faces thelaser module13 for a laser beam emitted from thelaser module13 to pass through. Furthermore, thefront covering part161 has a throughhole166 facing themanual switch15.
• Thelaser module13 is securely fitted on theelastic piece19, and theelastic piece19 is secured to thebase11 at one end, and the other end of theelastic piece19 is free. The front coveringpart161 of the coveringmember16 has ascrew hole167, and a threadedelement18 is passed through thescrew hole167 and pressed against theelastic piece19; the position of thelaser module13 can be adjusted by means of turning the threadedelement18 for changing the position of the threadedelement18 in relation to thescrew hole167.
• Referring toFIGS. 2,3,8,9, and10, when the rotatingshaft21 of thesawing machine2 is rotating, thelaser indicator1 secured on the rotatingshaft21 will also rotate, and thevibrating switch14 will vibrate to be in the “on” position so as to close the circuit comprising thebattery set17, thelaser module13, thevibrating switch14, and themanual switch15. Consequently, thelaser module13 is powered, and emits alaser beam3 through the throughhole165 of the coveringmember16, whichlaser beam3 is supposed to head towards exactly the same direction as the blade of the saw of thesawing machine2. Therefore, when the laser beam travels onto a work piece, it will mark a portion of the work piece to be cut with the saw, thus allowing the sawing process to be carried out accurately.
• If thelaser module13 fails to emit alaser beam3 towards exactly the same direction as the blade of the saw of thesawing machine2, the user should turn the threadedelement18 for making the threadedelement18 pressed against theelastic piece19 in a new position so as to adjust the orientation of thelaser module13 as well as the direction of thelaser beam3. Then, without turning on thesawing machine2, the user should turn on thelaser module13 by means of using themanual switch15, and check whether thelaser beam3 emitted from thelaser module13 heads towards exactly the same direction as the blade of the saw of thesawing machine2.
• The user is allowed to replace thebattery set17 with a new one after he separates therear covering part162 from thebase11 and thefront covering part161; after battery change, therear covering part162 is coupled to thefront covering part161 again by means of fitting thefasteners163 in thefastening holes164. In other words, there is no need for removal of the whole coveringmember16; if the whole coveringmember16 were removed for allowing battery change to be carried out, the user would have to fit the coveringmember16 back to thebase11 carefully such that the throughholes165 and166 could face thelaser module13 and themanual switch15 again respectively.
• From the above description, it can be seen that the present invention has the following advantages:
• 1. The laser module of the laser indicator is fitted on the elastic piece with both a fixed end and a free end, and the threaded element is pressed against the elastic piece so that the position of the laser module can be adjusted by means of changing the position of the threaded element in relation to the screw hole; if the laser module fails to emit a laser beam heading towards exactly the same direction as the blade of the saw, the orientation of the laser module can be adjusted for the laser beam to head towards the correct direction by means of turning the threaded element.
• 2. When the battery set run out of energy, the user is allowed to change battery while the front covering part of the covering member is still in its closing position. In other words, battery change can be carried out after the rear covering part is separated from the base and the front covering part; after battery change, the rear covering part is coupled to the front covering part again by means of fitting the fasteners into the fastening holes. Therefore, the laser indicator of the present invention is convenient to use.

Claims (3)

1. An adjusting structure of a laser indicator of a sawing machine,

a laser indicator being securely fitted on a rotating shaft of a sawing machine, on which rotating shaft a saw is fitted;

the laser indicator comprising:

a base;

a circuit board secured on the base;

a laser module connected to the circuit board;

an elastic piece, the elastic piece being secured to the base at one end thereof; the laser module being fitted on the elastic piece;

a vibrating switch fitted on the circuit board;

a battery set, the battery set touching the circuit board such that the battery set, the laser module, and the vibrating switch together comprise a circuit;

a covering member positioned over the base, the covering member having a first through hole facing the laser module for allowing a laser beam emitted from the laser module to pass through; the covering member having a screw hole thereon; and

a threaded element, the threaded element being passed through the screw hole of the covering member and pressed against the elastic piece for changing position of the laser module.

2. The adjusting structure of a laser indicator of a sawing machine as recited inclaim 1 further having a manual switch fitted on the circuit board; the covering member having a second through hole facing the manual switch.

3. The adjusting structure of a laser indicator of a sawing machine as recited inclaim 1, wherein the covering member includes front and rear covering parts; the front and the rear covering parts having a plurality of fasteners and fastening holes thereon; the front and the rear covering parts being coupled together with the fasteners being fitted in the fastening holes thereof.

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