1. A degree of cure measuring apparatus for measuring a degree of cure of adhesive agent, comprising:
an optical fiber for emitting light from a tip face thereof;
a light guide member detachably connected to the optical fiber and for irradiating the adhesive agent with light while a light emission face thereof is in contact with the adhesive agent; and
a detector for detecting light returning from an interface between the light emission face of the light guide member and the adhesive agent to the light guide member, wherein
the light guide member has a light guide part for irradiating the adhesive agent with light incident thereto while a light emission face thereof is in contact with the adhesive agent, and that is formed of a material having substantially the same refractive index as the adhesive agent before cure.
2. The degree of cure measuring apparatus according to claim 1, wherein
the light guide member further has a lens provided between the optical fiber and the light guide part.
3. The degree of cure measuring apparatus according to claim 1, further comprising a refractive index calculator for calculating a refractive index of the adhesive agent from a rate of a light amount detected by the detector to an emission light amount from the light guide member.
4. The degree of cure measuring apparatus according to claim 3, further comprising a recorder for recording time-variation of the refractive index calculated by the refractive index calculator.
5. The degree of cure measuring apparatus according to claim 1, wherein
the optical fiber is a single mode optical fiber.
6. The degree of cure measuring apparatus according to claim 1, wherein
the light guide member has an adhesive agent holder for holding the adhesive agent.
7. The degree of cure measuring apparatus according to claim 1, further comprising:
a capillary provided to a tip portion of the optical fiber; and
a split sleeve for connecting the capillary and the light guide member.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A power hand tool comprising:
a housing;
a driving device mounted in said housing, said driving device having a motor and a transmission gear set coupled to an output end of said motor;
a chuck coupled to said transmission gear set for holding a tool bit for enabling the tool bit to be rotated by said transmission gear set;
a battery pack detachably fastened to said housing for providing electricity to said driving device; and
a light projector mounted in said housing for projecting a line of light on a surface; wherein the light projector has a projecting direction toward an extending direction of the tool bit held by said chuck.
2. The power hand tool as claimed in claim 1, wherein said housing comprises a body for accommodating said motor and said transmission gear set of said driving device, a battery pack holder for holding said battery pack, and a grip connected between said body and said battery pack holder; said body having a front end and a rear end;
wherein said chuck has a part suspended inside said housing and coupled to an output end of said transmission gear set and a part extended out of said housing for holding the tool bit;
wherein said light projector is mounted in the rear end of said body of said housing.
3. The power hand tool as claimed in claim 2, wherein said light projector is rotatably mounted in the rear end of the body of said housing.
4. The power hand tool as claimed in claim 3, wherein said body of said housing comprises a circular opening in the rear end thereof and a retaining spring strip disposed adjacent to said circular opening for positioning said light projector to said housing, said retaining strip having a protruding portion;
wherein said light projector comprises a base having a cylindrical positioning portion suspended inside the rear end of said body of said housing and a neck extending from said cylindrical positioning portion and inserted through said circular opening of said body of said housing, said cylindrical positioning portion having four locating grooves equiangularly spaced around a periphery thereof, which are respectively engageable with the protruding portion of said retaining spring strip for enabling said retaining strip to positioning said base of said light projector to said body of said housing in such a manner that said base is rotatable relative to said body of said housing and lockable to said body of said housing in one of four angular positions that are spaced from one another at 90\xb0.
5. The power hand tool as claimed in claim 4, wherein said light projector further comprises a coupler connectable to said base between two positions, and a laser module mounted in said coupler for projecting light.
6. The power hand tool as claimed in claim 5, wherein said base comprises a main body located outside said body of said housing and fixedly connected to one end of said neck remote from said cylindrical positioning portion, the main body of said base having a coupling groove;
wherein said coupler comprises a mounting plate and a receptacle at one side of said mounting plate, said mounting plate having a coupling wall and a protruding engagement portion protruded from said coupling wall and connectable to the coupling groove of the main body of said base, said receptacle having a light-emitting hole extending in same direction as the protruding direction of said protruding engagement portion; said laser module comprises a laser diode mounted inside said receptacle, a deflecting lens mounted in said light-emitting hole for deflecting the light of said laser diode out of said light-emitting hole into a plane of light to form the line of light on the surface, a circuit board fixedly fastened to said coupling wall and electrically connected to said laser diode, a battery set mounted in said coupling wall and electrically connected to said circuit board, and a press-button switch mounted on said mounting plate for controlling the supply of electricity from said battery set to said circuit board;
wherein said light projector further comprises a first magnet set and a second magnet set, said first magnet set having a big magnet and a small magnet respectively mounted in the coupling groove of the main body of said base, said second magnet set having a big magnet and a small magnet respectively mounted in the protruding engagement portion of said coupler for securing said coupler to said base between a first position where the big magnet and small magnet of said first magnet set are respectively fastened to the small magnet and big magnet of said second magnet set by magnetic attraction and a second position where the big magnet of said first magnet set is fastened to the big magnet of said second magnet set by magnetic attraction.