Lamp with adjustable focus and color temperature

1. A lamp comprising:

a heat radiating housing;

an LED (light emitting diode) terminal seat mounted in the heat radiating housing;

an LED light mounted in the LED terminal seat;

a positioning seat mounted on the LED terminal seat;

a mounting seat mounted on the positioning seat;

a focus adjusting seat mounted on the positioning seat and corresponding to the mounting seat; and

a lens mounted in the mounting seat;

wherein:

the positioning seat has an inner face provided with two guide grooves extending in a spiral direction;

the focus adjusting seat includes a first portion and a second portion connecting a bottom of the first portion;

the focus adjusting seat is provided with two directing slots;

the mounting seat has an outer face provided with two guide pins locked in the two directing slots; and

the two guide pins are slidably mounted in the two guide grooves.

2. The lamp as claimed in claim 1 , wherein the focus adjusting seat has a hollow interior, and the second portion of the focus adjusting seat has a diameter greater than that of the first portion.

3. The lamp as claimed in claim 1 , wherein:

the heat radiating housing has a cylindrical shape;

the heat radiating housing has an inner face provided with a fixed base;

the fixed base is formed with a retaining portion;

the LED terminal seat includes a bottom plate and a locking ring connecting a peripheral face of the bottom plate;

the bottom plate is provided with a retaining recess mounted on the retaining portion; and

the LED light is sandwiched between the retaining portion and the retaining recess.

4. The lamp as claimed in claim 3 , wherein the fixed base has an inverted U-shaped cross-section, with two flat portions extending outward from two ends thereof and connecting the inner face of the heat radiating housing.

5. The lamp as claimed in claim 1 , further comprising:

a rear cover mounted on a rear end of the heat radiating housing;

a power supply that is light adjustable mounted in the heat radiating housing and located adjacent to the rear end of the heat radiating housing; and

a support member mounted on the rear cover.

6. The lamp as claimed in claim 5 , wherein:

the power supply is electrically connected with the LED light to control a work of the LED light; and

the power supply is provided with a control switch which controls the work of the LED light, to adjust a color temperature of the LED light during the work.

7. The lamp as claimed in claim 6 , further comprising:

a switch button mounted on an outer face of the rear cover and connected with the control switch;

wherein when the switch button is moved, the control switch is driven and moved by the switch button.

8. The lamp as claimed in claim 1 , wherein:

the locking ring has an inner face provided with a plurality of rib sets;

each of the rib sets includes two ribs and a locking groove defined between the two ribs; and

the positioning seat has an inner face provided with a plurality of locking projections each locked in the locking groove of each of the rib sets.

9. The lamp as claimed in claim 8 , wherein:

the inner face of the locking ring is provided with a plurality of locking strips;

the positioning seat has a top provided with a plurality of locking hooks hooked on the locking strips; and

each of the locking hooks has a bottom locked onto a top of each of the locking strips.

10. The lamp as claimed in claim 1 , wherein:

each of the two directing slots includes a horizontal section, a vertical section, and a locking section;

the horizontal section is disposed between the vertical section and the locking section, and has two sides respectively connected to the vertical section and the locking section; and

the locking section extends to an open top of the focus adjusting seat.

11. The lamp as claimed in claim 10 , wherein the locking section has two locking blocks formed on two sides thereof, and the two locking blocks are located adjacent to the horizontal section.