CN2634272Y

CN2634272Y - Multipurpose computer desk lamp

Info

Publication number: CN2634272Y
Application number: CN 03221384
Authority: CN
Inventors: 张天欢; 张天水; 杨乐乐; 曾富
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-24
Filing date: 2003-04-24
Publication date: 2004-08-18
Anticipated expiration: 2013-04-24

Abstract

A multi-purpose computer desk lamp comprises a light tube, a light house, a light base, a frame and a power switch, wherein the light tube is a cold-cathode fluorescent lamp. The utility model also comprises a power supply drive circuit consisting of an oscillatory circuit, a power amplification circuit and a power coupling circuit and electrically connected with a USB interface at a universal series bus. The utility model can directly utilize the USB interface at a computer to obtain an internal power supply to drive a light tube for working. The power supply drive circuit can make the cold-cathode fluorescent lamp work under a frequency of 33 kHz which can eliminate a flashing light ray generated by an ordinary fluorescent lamp work under a lower frequency of 50Hz. The utility model is characterized by visual acuity protection, simple structure, small outline, high luminescent efficiency, safe electricity use and energy saving, suitable for acting as an ordinary desk lamp and more suitable for acting as an assistant light source for a computer.

Description

Multipurpose computer desk lamp

Affiliated technical field

The utility model relates to a kind of desk lamp, particularly a kind of can be as the desk lamp of computer floor light.

Background technology

At present, desk lamp is mainly used in the desk illumination, and its structure generally comprises fluorescent tube, lampshade, lamp socket, support, power switch, and fluorescent tube mostly is incandescent lamp or fluorescent lamp, volume is relatively big, must use energy consumption height, complex structure, volume is big and the higher alternating current steady voltage plug of Electrical Safety risk.Some desk lamps by the light modulation vision protection are arranged, and structure is very complicated, and cost is also very high.

At present, computer monitor mainly contains the CRT computer monitor and uses the LCD computer display of light guide plate assembly as backlight, they use the power supply of computer inside, but illumination is low and regional little, because ambient brightness can change with the brightness that shows image, therefore the long-time computer that uses can produce negative influence to the eyesight of human eye under darker environment.

Summary of the invention

Technical problem to be solved in the utility model is; overcome the shortcoming of prior art, provide a kind of simple in structure, volume is little, can use computer internal electric source and can be as using computer that floor light is provided in the dark situation and being of value to the multipurpose computer desk lamp of vision protection.

The technical scheme that its technical problem that solves the utility model adopts is as follows: a kind of multipurpose computer desk lamp, have fluorescent tube, lampshade, lamp socket, support, power switch, it is characterized in that fluorescent tube is a cold-cathode fluorescence lamp, have the power driving circuit that connects to form by oscillating circuit, power amplification circuit, power coupling circuit three parts that is electrically connected with computer universal serial bus interface USB.

The beneficial effects of the utility model are as follows: can directly obtain the computer internal electric source by computer USB interface and drive lamp works; power driving circuit is worked cold-cathode fluorescence lamp under 33 KHz high-frequencies; eliminated the light scintillation that conventional fluorescent lamps is worked under 50 hertz of low frequencies; function with vision protection; simple in structure; volume is little; the luminous efficiency height; Electrical Safety; energy savings; can adopt common voltage-stabilized power supply as common desk lamp illumination usefulness, be more suitable in the floor light light source that utilizes the computer internal electric source as computer.

Description of drawings

Fig. 1 is the utility model multipurpose computer desk lamp power driving circuit block diagram.

Fig. 2 is the electric principle schematic of Fig. 1.

Fig. 3 is the utility model multipurpose computer desk lamp overall structure schematic diagram.

Fig. 4 is the A-A schematic diagram of Fig. 3.

Number in the figure is: 1-lampshade, 11-ball-joint, 3-support, the 31-upper bracket, 311-ball-and-socket, 312-packing ring, the 313-support spring, 32-lower carriage, 4-lamp socket, the 5-power switch, 6-power line interface, C1, C2-electric capacity, the T-coil, Q1, Q2-transistor, R1, R2-resistance, the L1-inductance, the D-fluorescent tube.

The specific embodiment

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.

As depicted in figs. 1 and 2, among the embodiment, the utility model multipurpose computer desk light fixture have be electrically connected with computer universal serial bus interface USB by oscillating circuit, power amplification circuit, the power driving circuit that power coupling circuit three parts connect to form, oscillating circuit is by the N1 of capacitor C 1 and coil T, N2 partly forms, power amplification circuit is by triode Q1, Q2, resistance R 1, R2, inductance L 1, the N3 of coil T partly forms, the power coupling circuit partly is made up of the N4 of capacitor C 2 and coil T, oscillating circuit connects power amplification circuit earlier and connects the power coupling circuit again, circuit is by USB interface acquisition+5V power supply, power amplification circuit is started working under the frequency of oscillation of 33KHz, oscillator signal makes lamp D luminous through being coupled on the cold-cathode fluorescence lamp D by the power coupling circuit after the power amplification.Among the embodiment, this circuit uses the inductance of 350 microhenrys, the electric capacity of 0.01 microfarad, EE19 skeleton and magnetic core, BUL45 triode, 50 pf capacitance value, FCC150D2.6 CCFL.

In embodiment as shown in Figure 3, the utility model multipurpose computer desk light fixture has lampshade 1, fluorescent tube (to be positioned at lampshade, do not draw among the figure, referring among Fig. 2 shown in the D), lamp socket 4, support 3,

power switch

5,6 is the power line interface that can be electrically connected with computer USB interface, uses the power driving circuit of USB interface to be contained in the lamp socket.

In embodiment as shown in Figure 4, the further feature of the utility model is: 1, support 3 is made of upper and lower two

parts

31,32 phase cutting ferrules, lampshade, fluorescent tube and upper bracket can be done 360 degree rotations around lower carriage, are convenient at the fixing laggard step joint lamp strip position of lamp holder position; 2, support 3 tops have ball-and-socket 311, the ball-joint 11 that is connected with lampshade is positioned at ball-and-socket, the ball-and-socket below has packing ring 312 and the support spring 313 that reduces friction, lampshade and fluorescent tube can be not less than the rotation of 180 degree by the ball-joint in the ball-and-socket in vertical plane, to change the direction of illumination of fluorescent tube, reach best result of use.

Claims

1, multipurpose computer desk lamp, have fluorescent tube, lampshade, lamp socket, support, power switch, it is characterized in that fluorescent tube is a cold-cathode fluorescence lamp, have the power driving circuit that connects to form by oscillating circuit, power amplification circuit, power coupling circuit three parts that is electrically connected with computer universal serial bus interface USB.

2, multipurpose computer desk lamp according to claim 1, it is characterized in that in the described power driving circuit, oscillating circuit is by the N1 of capacitor C 1 and coil T, N2 partly forms, power amplification circuit is by transistor Q1, Q2, resistance R 1, R2, inductance L 1, the N3 of coil T partly forms, the power coupling circuit partly is made up of the N4 of capacitor C 2 and coil T, oscillating circuit connects power amplification circuit earlier and connects the power coupling circuit again, circuit is by USB interface acquisition+5V power supply, and the oscillator signal of 33KHz frequency of oscillation is through being coupled on the cold-cathode fluorescence lamp D by the power coupling circuit after the power amplification.

3, multipurpose computer desk lamp according to claim 1 is characterized in that described support is made of upper and lower two parts phase cutting ferrule.

4, multipurpose computer desk lamp according to claim 1 is characterized in that described support top has ball-and-socket, and the ball-joint that is connected with lampshade is positioned at ball-and-socket, and the ball-and-socket below has packing ring and support spring.

5, multipurpose computer desk lamp according to claim 3 is characterized in that described support top has ball-and-socket, and the ball-joint that is connected with lampshade is positioned at ball-and-socket, and the ball-and-socket below has packing ring and support spring.