CN103032798A

CN103032798A - Light-emitting diode (LED) desk lamp

Info

Publication number: CN103032798A
Application number: CN2011102907221A
Authority: CN
Inventors: 张汉平; 梁怀清
Original assignee: SHANGHAI MEIDIXIN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SHANGHAI MEIDIXIN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-09-29
Filing date: 2011-09-29
Publication date: 2013-04-10
Anticipated expiration: 2031-09-29
Also published as: CN103032798B

Abstract

The invention relates to the technical field of lamps and discloses a light-emitting diode (LED) desk lamp which aims to provide a technical scheme different in technology conception. The LED desk lamp comprises an LED lamp tube assembly (ZJ) and the like. The LED desk lamp is characterized in that a lamp post comprises a post body, an LED indicator light (LED-Z), a battery box, a connecting plug seat, an option switch (K) and three batteries. A taking-placing port of the battery box is placed in the back of the post body, the three batteries are arranged in the battery box, the LED indicator light is exposed out of the front surface of the post body, and the surface of the option switch (K) is exposed out of the front surface of the post body. The option switch (K) comprises an input pin (K-0) and four output pins. The connecting plug seat comprises a connecting plug (CT), a connecting socket (CZ), a positive wire (CT-1) and a negative wire (CT-2), wherein the connecting plug (CT) is provided with a positive contact and a negative contact. The LED desk lamp has the advantages of being good in comprehensiveness of economy and practicability, low in price and strong in adaptability.

Description

A kind of LED desk lamp

Technical field

The present invention relates to technical field of lamps, particularly relate to a kind of LED desk lamp.

Background technology

LED illumination is the lighting engineering of a new generation, and it has the many merits such as radiationless, pollution-free, energy saving, is the perfect light source of green illumination.

Yet, the LED desk lamp of prior art, the light fixture that suits user's actual needs is many not enough, particularly for the area that has a power failure often or once in a while, the LED light fixture of prior art, it is economical and practical comprehensive desirable not enough.

Above-mentioned economical and practical comprehensive not ideal enough, its particular content has: often can not take into account the needs of normal illumination and outage illumination, and can take into account the light fixtures that these two kinds illuminations need, its manufacturing cost is high, and circuit is complicated; Also have, for frequent power failure or have a power failure once in a while, long-time that have a power failure or the short time has a power failure or do not have a power failure, often be to have turned round and look at one, lose the other end.Therefore, prior art fails to provide complete, economical and practical integrated technology scheme.

Summary of the invention

Prior art LED light fixture, with regard to overall technical architecture, it is economical and practical comprehensive not ideal enough, in order to solve this technical problem, and provides a kind of technical conceive different technical schemes, and technical scheme of the present invention is as follows.

1. a LED desk lamp comprises: LED fluorescent tube assembly, lampshade, lamp stand, lamp socket, circuit; Described lamp stand, its top is connected with lampshade, and its underpart is connected with lamp socket;

Described lamp stand comprises: the body of rod, LED light, battery case, attachment plug seat, selector switch, the first battery, the second battery, the 3rd battery;

Described battery case is provided for the mouth that picks and places of fetching battery, picks and places the back side that mouth is positioned at the body of rod;

Described the first battery, the second battery, the 3rd battery, this three all is positioned at battery case;

Described LED light, its fluorescent tube front end is emerging in the front surface of the body of rod;

Described selector switch, its surface is exposed to the front surface of the body of rod; Selector switch comprises: input stake, the first output stake, the second output stake, the 3rd output stake, the 4th output stake;

Described attachment plug seat comprises: attachment plug, gang socket, positive wire, cathode conductor; Described attachment plug has anodal contact point and negative pole contact point;

Positive wire, the one end is electrically connected with the anodal contact point of attachment plug, and its other end is electrically connected with the positive terminal of dc source output; Cathode conductor, the one end is electrically connected with the negative pole contact point of attachment plug, and its other end is electrically connected with the negative pole end of dc source output;

Gang socket is positioned at the downside of battery case; Gang socket has three terminals, and three terminals are respectively: the first terminals, the second terminals, the 3rd terminals;

When gang socket was extracted in attachment plug, the second terminals in the gang socket and the 3rd terminals were electrically connected;

After in a single day attachment plug insert gang socket, just have a, b, c situation to occur in the lump: a. the second terminals and the 3rd terminals cut off and are electrically connected; B. the anodal contact point of attachment plug is electrically connected with the first terminals of gang socket; C. the negative pole contact point of attachment plug is electrically connected with the second terminals of gang socket;

The first terminals of gang socket, the first anode, negative pole, the second anode, negative pole, the 3rd anode, negative pole, the second terminals of gang socket, they sequentially are connected in series;

The first terminals of gang socket, the 3rd current-limiting resistance, LED light is anodal, negative pole, the first output stake of selector switch, and order is connected in series, perhaps, the first terminals of gang socket, LED light is anodal, negative pole, the 3rd current-limiting resistance, the first output stake of selector switch, order is connected in series;

The 3rd anode, the first diode cathode, positive pole, the first current-limiting resistance, the first output stake of selector switch, order is connected in series, perhaps, and the 3rd anode, the first current-limiting resistance, the first diode cathode, positive pole, the first output stake of selector switch, order is connected in series; The 3rd GND, the second diode cathode, negative pole, the second current-limiting resistance, the first output stake of selector switch, order is connected in series, perhaps, and the 3rd GND, the second current-limiting resistance, the second diode cathode, negative pole, the first output stake of selector switch, order is connected in series;

Described LED fluorescent tube assembly, the one end is electrically connected with the first anode, and its other end is electrically connected with the 3rd output stake of selector switch.

2. described the first battery, the second battery, the 3rd battery, the facilities of this three battery are any one among the following three:

A. this three battery is the 1.2V rechargeable battery;

B. this three battery is the dry cell of 1.5V;

C. both be equipped with the rechargeable battery of above-mentioned a situation as battery commonly used, be equipped with again the dry cell of above-mentioned b situation as reserve battery, in the situation of outage and rechargeable battery electric energy deficiency, replaced rechargeable battery with dry cell.

3. described dc source, its inside comprises: rectification circuit, filter circuit, direct current regulation circuit; The input of dc source links to each other with electric main, and dc source is by positive terminal and negative pole end output DC, and galvanic magnitude of voltage is 5V ± 5%.

4. described desk lamp comprises: USB plug has a USB socket with USB plug is matching used; Described positive wire, its head end is electrically connected with the positive terminal of USB plug, and its tail end is electrically connected with the anodal contact point of attachment plug; Described cathode conductor, its head end is electrically connected with the negative pole end of USB plug, and its tail end is electrically connected with the negative pole contact point of attachment plug;

Described dc source and described USB socket are any one in following four:

A. described dc source is direct current output type power supply adaptor, and the output of direct current output type power supply adaptor is by the USB socket output DC;

B. described dc source is charger for mobile phone, and the output of charger for mobile phone is by the USB socket output DC;

C. described dc source is the D.C. regulated power supply in the personal desktop computer; D.C. regulated power supply, its input links to each other with AC power, and its output is by the intrinsic USB socket output DC of personal desktop computer;

D. described dc source is the DC power supply apparatus of notebook computer; DC power supply apparatus, its input links to each other with AC power, and its output links to each other with notebook computer; Notebook computer is by intrinsic USB socket output DC;

Among above-mentioned a, b, c, the d, the USB socket in its any technical scheme, all by with being connected of USB plug, realize output DC.

5. described LED fluorescent tube assembly comprises more than one branch road; Two above branch roads, each branch road is for being connected in parallel;

Each branch road all has following a and b character:

A. each branch road comprises: a branch road current-limiting resistance and a LED light emitting diode;

B. electrically connecting as of each branch road: the first anode, the branch road current-limiting resistance, the positive pole of LED light emitting diode, negative pole, the 3rd output stake of selector switch, order is connected in series; Perhaps, the first battery B1 is anodal, the positive pole of LED light emitting diode, negative pole, and the branch road current-limiting resistance, the 3rd output stake of selector switch, order is connected in series.

6. described LED fluorescent tube assembly comprises: a total current-limiting resistance, plural LED light emitting diode;

All LED light emitting diodes, they in the same way parallel connection become LED row; In other words, all LED light emitting diodes, their positive pole is connected, and their negative pole is connected;

The first anode, total current-limiting resistance, LED row is anodal, negative pole, the 3rd output stake of selector switch, order is connected in series; Perhaps, the first anode, LED row is anodal, negative pole, total current-limiting resistance, the 3rd output stake of selector switch, order is connected in series.

7. described battery case comprises: battery case main body, conduction union piece group, lid; By conduction union piece group, both realized the first anode, negative pole, the second anode, negative pole, the 3rd anode, negative pole sequentially are electrically connected in series, and realize again the inside and outside electrical connection of box; Lid is positioned at the opening part of battery case main body; Battery case main body and the body of rod are integrally manufactured; Perhaps, battery case main body and body of rod split are made, after split is made again with battery case main body and body of rod split assembly connection.

8. described lamp stand, its top and lampshade are rotationally connected, and its underpart and lamp socket are rotationally connected;

The body of rod comprises: pre-structure body, rear structure, battery case cover plate, printed substrate, conduction union piece group; The pre-structure body is fixedly connected with rear structure;

Position at the front surface place of pre-structure body is offered: be used for installing the indication installing hole of LED light, be used for installing the switch installing hole of selector switch; Bossed erection column is established at the back of pre-structure body, and this erection column is used for installing printed substrate; The lower position at pre-structure body back is provided with the first retaining structure, and the first retaining structure indicates installing hole, switch installing hole and erection column three all upper lower;

Be provided with the battery case agent structure in the rear structure; Described battery case agent structure is the rectangular cavity structure, and rectangular cavity caves in forward and opens wide backwards; The rectangular cavity structure comprises: upper wall, lower wall, left wall, right wall, diapire;

The battery case cover plate is installed at the place of opening wide backwards of rectangular cavity; Described installation refers to realize installing by mounting screw, and perhaps, described installation refers to be provided with the hole clipping bayonet arrangement between rear structure and the cover plate, realizes snap-in installation by the hole clipping bayonet arrangement;

Described gang socket, its structure comprises: jack and installation draw-in groove; Described rear structure, position, its underpart is provided with the second retaining structure; Described the first retaining structure and the second retaining structure are corresponding to arrange the installing card bit architecture of these two retaining structure completes; By draw-in groove and complete installing card bit architecture are installed, gang socket is connected with the body of rod connecting; Gang socket after the connection, its jack down.

9. described the first diode, the nominal value of its forward conduction tube voltage drop is 0.7V; Described the second diode, the nominal value of its forward conduction tube voltage drop are 0.3V.

The invention has the beneficial effects as follows:

Economical and practical is comprehensive good, low, the strong adaptability of price can be taken into account the needs that normal illumination and outage are thrown light on simultaneously, regardless of being that often have a power failure or that have a power failure once in a while, long or the short time power failure or not having a power failure, all take into account, and low cost of manufacture, circuit are simple.

Such as, the area that does not have a power failure, placing battery not, this is the technical scheme of least cost; Having a power failure once in a while, can insert dry cell to apply emergent need, is a kind of technical scheme that only increases low expense; Often have a power failure, place rechargeable battery and solve illumination; Ultra-long time has a power failure, after the electric energy of rechargeable battery is exhausted, replace to reach with dry cell and continue illumination again.

Also have, multiple alternative charging technique scheme has the advantage of zero cost; Owing in these charging technique schemes, used the existing common electric of most families, do not need extra increase expense because will add charge function.

In addition, provide the illumination of highlight illumination pattern and low-luminance mode selective.

In addition, single LED light, not only circuit is simple, and is enough to reflect the various states of light fixture.

In sum, the present invention has the overall merit of globality.

Description of drawings

Fig. 1 is one of circuit diagram of invention desk lamp, and what reflect among the figure is that the situation in the gang socket is not inserted in attachment plug, so drawing is not drawn attachment plug yet, also has, and the LED fluorescent tube assembly among the figure is single branch road;

Fig. 2 be the invention desk lamp circuit diagram two, what reflect among the figure is that the situation in the gang socket is inserted in attachment plug;

Fig. 3 be the invention desk lamp circuit diagram three, the LED fluorescent tube assembly among the figure has two branch roads;

Fig. 4 be the invention desk lamp circuit diagram four, the LED fluorescent tube assembly among the figure has N branch road;

Fig. 5 be the invention desk lamp circuit diagram five, the LED fluorescent tube assembly among the figure has a total current-limiting resistance and two LED light emitting diodes;

Fig. 6 be the invention desk lamp circuit diagram six, the LED fluorescent tube assembly among the figure has a total current-limiting resistance and N LED light emitting diode;

Fig. 7 is voltage mark figure, and compared to Figure 1, increased picture the mark of voltage swing (magnitude of voltage of mark is desirable theoretical voltage) at some places, and the input stake of selector switch and the 3rd output are electrically connected; Among this figure, LED fluorescent tube assembly is provided electric energy and is the highlight illumination state by battery;

Fig. 8 is voltage mark figure, and compared to Figure 1, increased picture the mark of voltage swing (magnitude of voltage of mark is desirable theoretical voltage) at some places, and the input stake of selector switch and the second output are electrically connected; Among this figure, LED fluorescent tube assembly is provided electric energy and is the low-light level illumination condition by battery;

Fig. 9 is the charging schematic diagram, and the dotted line with arrow among the figure is the glide path of charging current;

Figure 10 is the schematic diagram that outside 5V direct current orders about LED fluorescent tube assembly maximum brightness illumination;

What Figure 11 expressed is: the input termination 220V electric main of charger for mobile phone, and charger for mobile phone output 5V direct current, direct current is delivered to the situation of USB plug and follow-up transmission etc. by USB socket; 220V among the figure～representative connects 220 volts of electric mains;

Figure 12 is the partial enlarged drawing at I place among Figure 11, and magnification ratio is 2.5: 1;

Figure 13 is the circuit diagram that does not have the invention desk lamp of battery;

Figure 14 is the drive circuit of the LED light under a certain situation, and the situation corresponding with this figure is: attachment plug pulls away out and selector switch is in input stake and the first output and is electrically connected from gang socket;

Figure 15 is the front view of invention desk lamp;

Figure 16 is the right view of Figure 15;

Figure 17 is the left view of Figure 15;

Figure 18 is the separation graph of Figure 15;

Figure 19 is the front view of rear structure;

Figure 20 is the left view of Figure 19;

Figure 21 is the right view of Figure 19;

Figure 22 is the cutaway view of Figure 19;

Figure 23 is the front view of pre-structure body;

Figure 24 is the left view of Figure 23;

Figure 25 is the right view of Figure 23;

Figure 26 is the front view of gang socket;

Figure 27 is the left view of Figure 26;

Figure 28 is the right view of Figure 26;

Figure 29 is the top view of Figure 26;

Figure 30 is one of schematic diagram of gang socket and installing card bit architecture;

Figure 31 be gang socket and installing card bit architecture schematic diagram two

Figure 32 be gang socket and installing card bit architecture schematic diagram three;

Figure 33 be gang socket and installing card bit architecture schematic diagram four;

Figure 34 be gang socket and installing card bit architecture schematic diagram five;

Figure 35 be gang socket and installing card bit architecture schematic diagram six;

Figure 33 be gang socket and installing card bit architecture schematic diagram seven.

The number in the figure explanation

B1 is the first battery; B2 is the second battery; B3 is the 3rd battery; CT is attachment plug; CT-1 is positive wire; CT-2 is cathode conductor; CZ is gang socket; CZ-1 is the first terminals; CZ-2 is the second terminals; CZ-3 is the 3rd terminals; CZ-C installs draw-in groove; CZ-K is jack; D1 is the first diode; D2 is the second diode; LED-1 is the LED light emitting diode; LED-2 is the LED light emitting diode; LED-N is the LED light emitting diode; LED-Z is LED light; K is selector switch; K-0 is the input stake; K-1 is the first output stake; K-2 is the second output stake; K-3 is the 3rd output stake; K-4 is the 4th output stake; R1 is the first current-limiting resistance; R2 is the second current-limiting resistance; R3 is the 3rd current-limiting resistance; R4 is dropping resistor; RZ is total current-limiting resistance; RZX-1 is the branch road current-limiting resistance; RZX-2 is the branch road current-limiting resistance; RZX-N is the branch road current-limiting resistance; SC is charger for mobile phone; USB-T is USB plug; USB-Z is USB socket; ZJ is LED fluorescent tube assembly;

The 1st, lampshade 1; The 2nd, the pre-structure body; The 3rd, rear structure; The 4th, lamp socket; The 5th, light-passing board; The 6th, the battery case main body; 6-1 is upper wall; 6-2 is lower wall; 6-3 is left wall; 6-4 is diapire; The 7th, conduction union piece group; The 8th, printed substrate; The 9th, screw; The 10th, erection column.

The present invention is described in further detail below in conjunction with the drawings and specific embodiments.

The specific embodiment

Present invention is described at first, on the whole.

A kind of LED desk lamp of the present invention comprises: LED fluorescent tube assembly ZJ, lampshade 1, lamp stand, lamp socket 4, circuit; Described lamp stand, its top is connected with lampshade 1, and its underpart is connected with lamp socket 4;

Particularly: described lamp stand comprises: the body of rod, LED light LED-Z, battery case, attachment plug seat, selector switch K, the first battery B1, the second battery B2, the 3rd battery B3;

Described the first battery B1, the second battery B2, the 3rd battery B3, this three all is positioned at battery case;

Described LED light LED-Z, its fluorescent tube front end is emerging in the front surface of the body of rod;

Described selector switch K, its surface is exposed to the front surface of the body of rod; Selector switch K comprises: input stake K-0, the first output stake K-1, the second output stake K-2, the 3rd output stake K-3, the 4th output stake K-4;

Described attachment plug seat comprises: attachment plug CT, gang socket CZ, positive wire CT-1, cathode conductor CT-2; Described attachment plug CT has anodal contact point and negative pole contact point;

Positive wire CT-1, the one end is electrically connected with the anodal contact point of attachment plug CT, and its other end is electrically connected with the positive terminal of dc source output; Cathode conductor CT-2, the one end is electrically connected with the negative pole contact point of attachment plug CT, and its other end is electrically connected with the negative pole end of dc source output;

Gang socket CZ is positioned at the downside of battery case; Gang socket CZ has three terminals, and three terminals are respectively: the first terminals CZ-1, the second terminals CZ-2, the 3rd terminals CZ-3;

When attachment plug CT extracted gang socket CZ, the second terminals CZ-2 among the gang socket CZ and the 3rd terminals CZ-3 were electrically connected;

After in a single day attachment plug CT inserts gang socket CZ, just have a, b, c situation to occur in the lump: a. the second terminals CZ-2 and the 3rd terminals CZ-3 cut off and are electrically connected; B. the anodal contact point of attachment plug CT is electrically connected with the first terminals CZ-1 of gang socket CZ; C. the negative pole contact point of attachment plug CT is electrically connected with the 3rd terminals CZ-2 of gang socket CZ;

The first terminals CZ-1 of gang socket CZ, the first battery B1 is anodal, negative pole, and the second battery B2 is anodal, negative pole, and the 3rd battery B3 is anodal, negative pole, the second terminals CZ-2 of gang socket CZ, they sequentially are connected in series;

The first terminals CZ-1 of gang socket CZ, the 3rd current-limiting resistance R3, LED light LED-Z is anodal, negative pole, the first output stake K-1 of selector switch K, and order is connected in series, perhaps, the first terminals CZ-1 of gang socket CZ, LED light LED-Z is anodal, negative pole, the 3rd current-limiting resistance R3, the first output stake K-1 of selector switch K, order is connected in series;

The 3rd battery B3 is anodal, the first diode D1 negative pole, positive pole, the first current-limiting resistance R1, the first output stake K-1 of selector switch K, order is connected in series, perhaps, the 3rd battery B3 is anodal, the first current-limiting resistance R1, the first diode D1 negative pole, positive pole, the first output stake K-1 of selector switch K, order is connected in series; The 3rd battery B3 negative pole, the second diode D2 is anodal, negative pole, the second current-limiting resistance R2, the first output stake K-1 of selector switch K, order is connected in series, perhaps, the 3rd battery B3 negative pole, the second current-limiting resistance R2, the second diode D2 is anodal, negative pole, the first output stake K-1 of selector switch K, order is connected in series;

Described LED fluorescent tube assembly ZJ, the one end is electrically connected with the first battery B1 is anodal, and its other end is electrically connected with the 3rd output stake K-3 of selector switch K.

For above describe, in general terms, the below makes relevant description and interpretation.

One of description and interpretation.

Attachment plug seat involved in the present invention, ready-made product is bought in suggestion; This attachment plug seat in some local shop, also claims bananajack or JK connector assembly.This attachment plug seat is also often used in stereo set, such as certain stereo set, and the loudspeaker music playing that can choice for use equipment carries, also can choice for use external earphone or the external music playings such as loudspeaker.Insert external earphone or insert external loudspeaker, external earphone or insert external loudspeaker music playing then, and the loudspeaker that carry are noiseless; Otherwise, pull up external earphone or pull up external loudspeaker, external earphone or to insert external loudspeaker noiseless then, and the loudspeaker that carry are play.Plug receptacle in the above-mentioned stereo set, what often use is exactly attachment plug seat involved in the present invention.Certainly, if the legal implementer of the present invention produces on a large scale, also can consider designed, designed and production attachment plug seat, to reach the principle of work and power of not only continuing to use the attachment plug seat that invention relates to, but also can reduce the purpose such as cost.

Also have, the transistor radio that last century 60, the seventies, people used, its power supply can use the dry cell that is contained in the self-contained battery box, also can change the use external power supply, and what this translation interface used is exactly attachment plug seat involved in the present invention.Pull up the dry cell in attachment plug CT, the use machine; Plug attachment plug CT, use external power supply.

Described above only is some situation of attachment plug seat involved in the present invention, but is not whole situations; Namely say, so-called " attachment plug seat ", its scope that contains is as the criterion with claims.The selector switch that below illustrates and introduce, its scope that contains is to be as the criterion with claims too.

Two of description and interpretation.

Selector switch K involved in the present invention, ready-made product is bought in suggestion.Selector switch K comprises: an input stake and four output stakes, during use the user can: select input stake K-0 to be electrically connected with first an output K-1, perhaps select input stake K-0 to be electrically connected with the second output stake K-2, perhaps select input stake K-0 to be electrically connected with the 3rd output stake K-3, perhaps select input stake K-0 to be electrically connected with the 4th output stake K-4; More than four kinds of situations, in reality is manually selected, can only select a kind ofly at every turn, as changing, need manually again select.

For the purpose that realizes inventing, selector switch K can be key switch (key switch also claims press button), can be key switch, can be band switch, can also be other suitable switch.Recommendation key switch of the present invention, this switch is whenever pressed once, an input stake K-0 just changes different output stakes and connects, and accumulative total to press four times be a circulation and then restart.

Of particular note: four output stakes, called after the first output stake K-1, second exports stake K-2, the 3rd output stake K-3 and the 4th an output K-4 respectively, " one " in the title, " two ", " three " and " four " are only convenient in order to be named, and do not mean that relevant action must be undertaken by " one ", " two ", " three ", " fours' " order.The actual priority action of selector switch K can be undertaken by " one ", " two ", " three ", " fours' " order, also can carry out not according to " one ", " two ", " three ", " fours' " order.

The below explains as an example of key switch example.

The key switch of selecting has an input stake K-0 and four output stakes, and four output stakes are respectively: the first output stake K-1, the second output stake K-2, the 3rd output stake K-3 and the 4th output stake K-4.Assumed initial state is connected with the 4th output stake K-4 for input stake K-0, then the situation after pressing the first time is: can be designed as input stake K-0 and the first output stake K-1 electrical connection, also can be designed as input stake K-0 and the second output stake K-2 electrical connection or be designed to input stake K-0 and the 3rd output stake K-3 electrical connection.For another example, if the result after pressing for the first time is electrically connected for input stake K-0 and first exports stake K-1, the situation after pressing for the second time then: can be designed as input stake K-0 and the second output stake K-2 is electrically connected, also can be designed as input stake K-0 and the 3rd output stake K-3 is electrically connected; Other situations by that analogy.Certainly, the numbering of key switch output stake is in case after design determines and make completion, then sequence of movement just determine constant, unless design again separately, make.

Above-mentioned " numbering of key switch output stake is in case after design determined and make completion, then sequence of movement was just determined constant ", this conclusion is effective to key switch; For band switch, except positive order, also have opposite sequence selective; For key switch, can press arbitrarily any one key, so there is not the problem of order.

Also have, in key switch, adjacent, tactic output stake, the order name that can export by the first output stake K-1, second stake K-2, the 3rd output stake K-3 and the 4th an output K-4 also can be not according to the order name.

Three of description and interpretation.

Correlation circumstance after attachment plug CT pulls away out from gang socket CZ carries out following explanation in conjunction with Fig. 1.

If attachment plug CT is not inserted among the gang socket CZ, then the second terminals CZ-2 among the gang socket CZ and the 3rd terminals CZ-3 are electrically connected.

Below in conjunction with Fig. 1, different output stakes from each are electrically connected to selector switch K input stake K-0 situation and meaning explain and explain.

1. selector switch K is in the state that input stake K-0 is electrically connected with the first output stake K-1.At this moment, LED fluorescent tube assembly ZJ extinguishes, and LED light LED-Z does luminous indication.

It needs to be noted: among Fig. 1, the second diode D2 and the second current-limiting resistance that are connected in series, their two ends are by short circuit, the short circuit path is: the second terminals CZ-2, the 3rd terminals CZ-3, the input stake K-0 of selector switch K, the first output stake K-1 of selector switch K.

Behind above-mentioned short circuit, the drive circuit of LED light LED-Z can be depicted as separately Figure 14.Also have, in Figure 14, the first diode D1 that is connected in series and the first current-limiting resistance R1 are by the 3rd battery B3 reverse bias, and it is equivalent to open circuit and does not exist.So, the driving situation of LED light LED-Z is changed to: the first battery B1, the second battery B2 and the 3rd battery B3 are connected in series, and the drive current of LED light is set out → negative pole of the 3rd current-limiting resistance R3 → LED light LED-Z → arrival the 3rd battery B3 by the first battery B1 positive pole.

Owing to increased by the 3rd battery B3 in the driving power, the LED light LED-Z of this moment is bright especially.

2. selector switch K is in the state that input stake K-0 is electrically connected with the second output stake K-2.At this moment, LED fluorescent tube assembly ZJ is in the illuminating state of low-light level; Simultaneously, LED light LED-Z does luminous indication.

Understand in conjunction with Fig. 8.Fig. 8 is voltage mark figure, compared to Figure 1, increased picture the mark of voltage swing (magnitude of voltage of mark is desirable theoretical voltage) at some places.

At this moment, it is the first battery B1 and the second battery B2 that is connected in series that driving LED indicator lamp LED-Z makes luminous power supply, and the shinny electric current of driving LED indicator lamp is from the negative pole of the first battery B1 positive pole → the 3rd current-limiting resistance R3 → LED light LED-Z → first current-limiting resistance R1 → the first diode D1 → arrival the second battery B2.Owing to only have two batteries to participate in driving, LED light is not so good as the so bright of above three batteries driving.

Also have, the illumination direct current that the first battery B1, the second battery B2 and the 3rd battery B3 provide, its path of flowing is: the negative pole of the second terminals CZ-2 of the 3rd terminals CZ-3 of the input stake K-0 of second output stake K-2 → selector switch K of the positive pole of the first battery B1 → LED fluorescent tube assembly ZJ → dropping resistor R4 → selector switch K → gang socket CZ → gang socket CZ → the 3rd battery B3.LED fluorescent tube assembly ZJ among Fig. 1 is a branch road, comprises LED LED-1 of a branch road current-limiting resistance RZX-1 in the branch road.If LED fluorescent tube assembly ZJ is changed over that have two light emitting diodes or more multiple optical diode, related content sees the introduction of many places, back for details.

3. selector switch K is in the state that input stake K-0 is electrically connected with the 3rd output stake K-3.

Understand in conjunction with Fig. 7.Fig. 7 is voltage mark figure, compared to Figure 1, increased picture the mark of voltage swing (magnitude of voltage of mark is desirable theoretical voltage) at some places.

At this moment, LED fluorescent tube assembly ZJ is in the illuminating state of higher brightness; Simultaneously, LED light LED-Z does luminous indication (being driven by two batteries).The illumination direct current that the first battery B1, the second battery B2 and the 3rd battery B3 provide, its path of flowing is: the negative pole of the second terminals CZ-2 of the 3rd terminals CZ-3 of the input stake K-0 of the 3rd output stake K-3 → selector switch K of the positive pole of the first battery B1 → LED fluorescent tube assembly ZJ → selector switch K → gang socket CZ → gang socket CZ → the 3rd battery B3.Above-mentioned situation, because electric current no longer passes through dropping resistor R4, so compare with the state that the second output stake K-2 is electrically connected, the brightness of LED-1 is just higher.

4. selector switch K is in the state that input stake K-0 is electrically connected with the 4th output stake K-4.At this moment, the 4th output stake K-4 is empty stake, and LED fluorescent tube assembly ZJ extinguishes; Also have, the LED light drive current that the first battery B1 and the second battery B2 provide, it is along the path flow of the 3rd current-limiting resistance R3 → LED light LED-Z → the first current-limiting resistance R1 → first diode D1, and LED light LED-Z does luminous indication.

Four of description and interpretation.

After attachment plug CT inserted gang socket CZ, correlation circumstance carried out following explanation in conjunction with Fig. 2.

In a single day attachment plug CT inserts gang socket CZ, just has a, b, c situation to occur in the lump: a. the second terminals CZ-2 and the 3rd terminals CZ-3 cut off and are electrically connected; B. the anodal contact point of attachment plug CT is electrically connected with the first terminals CZ-1 of gang socket CZ; C. the negative pole contact point of attachment plug CT is electrically connected with the second terminals CZ-2 of gang socket CZ.

Also have, positive wire CT-1, the one end is electrically connected with the anodal contact point of attachment plug CT, and its other end is electrically connected with the positive terminal of dc source output; Cathode conductor CT-2, the one end is electrically connected with the negative pole contact point of attachment plug CT, and its other end is electrically connected with the negative pole end of dc source output.

Below to situation and the meanings of the different output stake from each of selector switch K input stake K-0 electrical connection, explain and explain.

1. selector switch K is in the state that input stake K-0 is electrically connected with the first output stake K-1.

Understand in conjunction with Fig. 9.Fig. 9 is the charging schematic diagram, and the dotted line with arrow among the figure is the glide path of charging current.

At this moment, outside dc source is that the three joint rechargeable batteries of B1, B2 and B3 charge to label.The path of charging is: the first terminals CZ-1 of the anodal contact point of the positive terminal of dc source output → positive wire CT-1 → attachment plug CT → gang socket CZ → the first battery B1, the second battery B2, the negative pole end of the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of first output stake K-1 → selector switch K of the 3rd battery B3 → the second diode D2 → the second current-limiting resistance R2 → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → dc source output.Illustrate 1: above-mentioned dc source does not omit in Fig. 2 and draws; Illustrate 2: the input termination electric main of dc source, the output output DC of dc source.

When selecting K switch to be in input stake K-0 with state that first an output K-1 is electrically connected, simultaneous situation also has 2 points: the 1st is that LED fluorescent tube assembly ZJ extinguishes; The 2nd point, outside dc source driving LED indicator lamp LED-Z is shinny, in other words, after the 3rd current-limiting resistance R3 and the LED light LED-Z series connection, at the two ends that are connected across dc source.At this moment, the 3rd current-limiting resistance R3 of series connection and LED light LED-Z are as a series connection part, and voltage that its two ends apply is maximum, namely says, any other situation is all big less than the voltage that this situation applies, and therefore, LED light is the brightest.

In addition, when charging, should guarantee that the first battery B1, the second battery B2 and the 3rd battery B3 all are rechargeable battery; Because dry cell is not suitable for charging.

2. selector switch K is in the state that input stake K-0 is electrically connected with the second output stake K-2.At this moment, outside dc source provides the dc lighting electric energy to LED fluorescent tube assembly ZJ, and LED fluorescent tube assembly ZJ is in the illuminating state of low-light level; Simultaneously, LED light LED-Z is driven by the first battery B1 and the second battery B2 and does luminous indication.The walking path of dc lighting electricity is: the negative pole end of the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of second output stake K-2 → selector switch K of the first terminals CZ-1 of the anodal contact point of the positive terminal of dc source output → positive wire CT-1 → attachment plug CT → gang socket CZ → LED fluorescent tube assembly ZJ → dropping resistor R4 → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → dc source output.

Understand in conjunction with Figure 10.

At this moment, outside dc source provides the dc lighting electric energy to LED fluorescent tube assembly ZJ, and LED fluorescent tube assembly ZJ is in the illumination condition of high brightness; Simultaneously, LED light LED-Z is driven by battery B1 and B2 and does luminous indication.The path of dc lighting electric current walking is: the negative pole end of the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of the 3rd output stake K-3 → selector switch K of the first terminals CZ-1 of the anodal contact point of the positive terminal of dc source output → positive wire CT-1 → attachment plug CT → gang socket CZ → LED fluorescent tube assembly ZJ → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → dc source output.

4. selector switch K is in the state that input stake K-0 is electrically connected with the 4th output stake K-4.At this moment, the 4th output stake K-4 is empty stake, and LED fluorescent tube assembly ZJ extinguishes.The direct current that the first battery B1 and the second battery B2 provide, it is along the 3rd current-limiting resistance R3 → LED light LED-Z → first current-limiting resistance R1 → first diode D1 path flow, and LED light LED-Z does luminous indication.

Five of description and interpretation.

Concentrate and again LED light LED-Z is described; According to indicator lamp from the brightest to dim, at last to extinguishing as order, be described below respectively.

1.LED indicator lamp brightness is the highest.

LED light brightness is the highest when the external device (ED)s such as dc source charge to rechargeable battery; Carve at this moment: the external device (ED)s such as a. dc source, its input termination 220V electric main, its output output 5V (or being about 5V) direct current; B. attachment plug CT inserts gang socket CZ, the 5V direct current is input between the first terminals CZ-1 and the 3rd terminals CZ-3 of gang socket CZ; C. the input stake K-0 of selector switch K and the first output stake K-1 are electrically connected.

Also have, in the situation that keeps above a, b, c, no matter charge, or charging is finished substantially, charging current is minimum, or takes rechargeable battery away, and it is the highest that LED light is brightness.

2.LED indicator lamp brightness the second height.

When attachment plug CT is not inserted among the gang socket CZ and selector switch K is in input stake K-0 and is connected in place with state and three batteries of the first output stake K-1 electrical connection; Satisfy simultaneously aforementioned condition, LED light brightness is the second height, is due to three batteries drive.

3.LED indicator lamp brightness third high.

When three batteries connect in place and selector switch K be in input stake K-0 is electrically connected with second an output stake K-2 (perhaps selector switch K be in that input stake K-0 is electrically connected with the 3rd an output stake K-3 or selector switch K be in input a K-0 and the 4th and export a K-4 and be electrically connected) time, LED light brightness is third high.

When satisfying above-mentioned situation, LED light brightness is third high, and attachment plug CT inserts or do not insert among the gang socket CZ, is the brightness third high.

4.LED indicator lamp is dim.

It is in place that three batteries connect, if when the electric energy of battery is about to exhaust, then selector switch K when some annexations, the luminous dimness of LED light.

When being in input stake K-0 and being electrically connected with the 4th an output K-4 such as: selector switch K, if there is the battery of sufficient electrical energy, then LED light LED-Z is shinny; If the electric energy of battery is not enough, then indicator lamp is dim.

5.LED indicator lamp extinguishes.

After three batteries were removed, then selector switch K was when some annexations, and LED light is extinguished.

When being in input stake K-0 and being electrically connected with the 4th an output K-4 such as: selector switch K, if there is battery, then LED light LED-Z is shinny; If take battery away, then indicator lamp extinguishes.

Except above-mentioned 5 kinds of situations, also to be further described.In further technical scheme, the nominal value of the first diode D1 forward conduction tube voltage drop is 0.7V rather than 0.3V, and the purpose of this measure is: make the shinny, dim of indicator lamp and extinguish easier differentiation.

Comprehensive above situation in the present invention, only relies on simple circuit and a common LED indicator lamp LED-Z as can be known, just can indicate multiple situation, embodied economical and practical comprehensive well.

Six of description and interpretation.

About the situation of the frame for movement of invention desk lamp, can understand in conjunction with Figure 15 to Figure 18; Also have, in embodiment ten, also have more detailed description and interpretation.

Embodiment one

Describe in conjunction with Fig. 1.

Attachment plug CT does not insert gang socket CZ; The first battery B1, the second battery B2 and the 3rd battery B3 all are dry cells, and every joint dry cell is the 1.5V DC voltage.

Below introduce the input stake K-0 of selector switch K and the situation of different output stake connections.

Assumed initial state is: selector switch K is in input stake K-0 and is electrically connected with the 4th output stake K-4; At this moment, LED fluorescent tube assembly ZJ extinguishes, and LED light LED-Z does luminous indication.

Manually change selector switch K, input stake K-0 is electrically connected with the first output stake k-1; At this moment, LED fluorescent tube assembly ZJ extinguishes, and LED light LED-Z does luminous indication.

Manually change selector switch K, input stake K-0 is electrically connected with the second output stake K-2; At this moment, LED fluorescent tube assembly ZJ low-light level is luminous, and LED light LED-Z does luminous indication.The luminous benefit of low-light level is to save electric energy, and the time that light fixture is lighted can be longer.In situation about having a power failure, for the illumination of indoor low-light level is provided, can select the luminous pattern of low-light level.

Manually change selector switch K, input stake K-0 is electrically connected with the 3rd output stake K-3; At this moment, LED fluorescent tube assembly ZJ is that higher brightness is luminous, and LED light LED-Z does luminous indication.The luminous benefit of higher brightness is the illumination light of writing that can provide suitable.In situation about having a power failure, for the illumination that reading is provided, writes etc., can select the luminous pattern of higher brightness, but this pattern power consumption is more.

Manually change selector switch K, input stake k-0 is electrically connected with the 4th output stake K-4, so, then got back to original state.

Above-mentioned several situation, under normal condition, indicator lamp is luminous indication all, and therefrom explanation has battery to exist.

If indicator lamp is not luminous, then explanation: perhaps do not have battery, perhaps the electric energy in the battery exhausts fully.Dim if although indicator lamp is luminous, illustrate that the electric energy of battery is not enough.

In fact can be reduced to, will input stake k-0 and be electrically connected with the 4th an output stake K-4 and observe: the not luminous explanation of indicator lamp does not have battery, and electric energy that indicator lamp is dim to illustrate battery is deficiency.

The economical and practical comprehensive analysis of present embodiment is as follows.

According to the LED light fixture that the present embodiment mode is made, can be carried to open-air the use; Because what use is dry cell, so in the situation that does not have the 220V electric main, still can shine with not missing.Also have, in the place of accidental power failure, the LED light fixture of making according to the present embodiment mode can also use as emergency power supply, as long as the state of the dry cell of can packing into, manual selection switch K can be lighted illumination.

Embodiment two

All change the first battery B1 among the embodiment one, the second battery B2 and the 3rd battery B3 into rechargeable battery, every joint rechargeable battery is the 1.2V DC voltage; Other conditions are constant.

When the annexation of manual change selector switch K, the situation of introduction is similar among situation about then occurring and the embodiment one.

In addition, the voltage of rechargeable battery can keep stable in long power-on time, thereby the brightness of LED fluorescent tube assembly ZJ is also more stable; The voltage of dry cell does not have the voltage stabilization of rechargeable battery, and the dry cell that newly changes is higher at firm time spent voltage, but descends soon, then enters the stage of stable development of long period.

Embodiment three

Describe in conjunction with Figure 11 and Figure 12.

In the present embodiment, be equipped with one of general mobile phone charger.Before the present patent application is submitted day to, the charger for mobile phone of domestic product or sale, according to the world and related standards China national and regulation, the USB socket that its output must Application standard, by the direct current of USB socket output, its voltage must be in the error range of 5V ± 5%; Also have, the input of charger for mobile phone links to each other with the 220V electric main.

The first battery B1, the second battery B2 and the 3rd battery B3 are installed, and this three battery all is No. 5 rechargeable batteries, and every joint rechargeable battery is the 1.2V DC voltage.

Positive wire CT-1 and cathode conductor CT-2, an end of these two wires links to each other with the USB plug USB-T of standard, and the other end links to each other with attachment plug CT in the attachment plug seat.

USB plug USB-T is inserted in the USB socket USB-Z.Behind attachment plug CT insertion gang socket CZ, just have a, b, c situation to occur in the lump this moment: a. the second terminals CZ-2 and the 3rd terminals CZ-3 cut off and are electrically connected; B. the anodal contact point of attachment plug CT is electrically connected with the first terminals CZ-1 of gang socket CZ; C. the negative pole contact point of attachment plug CT is electrically connected with the second terminals CZ-2 of gang socket CZ.

1. suppose: selector switch K is in input stake K-0 and the 4th an output stake K-4 is electrically connected; At this moment, LED fluorescent tube assembly ZJ extinguishes, and LED light LED-Z does luminous indication.

2. manually change selector switch K, input stake K-0 is electrically connected with the first output stake K-1.The electric energy that is provided by the 220V electric main, by the three joint rechargeable batteries chargings of general mobile phone charger to B1, B2 and B3.Specifically: the 220V electric main is sent into the input of charger for mobile phone, charger for mobile phone output 5V ± 5% direct current charges, and the path of charging current is: the first terminals CZ-1 of the anodal contact point of USB socket positive pole → USB plug positive pole → positive wire CT-1 → attachment plug CT → gang socket CZ → the first battery B1, the second battery B2, the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of first output stake K-1 → selector switch K of the 3rd battery B3 → the second diode D2 → the second current-limiting resistance R2 → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → USB plug negative pole → USB socket negative pole.

When selecting K switch to be in input stake K-0 with state that the first output stake K-1 is electrically connected, simultaneous situation in addition: LED fluorescent tube assembly ZJ extinguishes, and LED light LED-Z does the luminous indication of maximum brightness.

3. manually change selector switch K, input stake K-0 is electrically connected with the second output stake K-2.At this moment, LED light LED-Z does luminous indication.The 220V electric main provides the illumination electric energy by charger for mobile phone, so that LED fluorescent tube assembly ZJ is in the low-light level luminance.

Order about the luminous direct current of LED fluorescent tube assembly ZJ low-light level, its route of flowing through is: the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of second output stake K-2 → selector switch K of the first terminals CZ-1 of the anodal contact point of the USB socket positive pole of charger for mobile phone output → USB plug positive pole → positive wire CT-1 → attachment plug CT → gang socket CZ → LED fluorescent tube assembly ZJ → dropping resistor R4 → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → USB plug negative pole → USB socket negative pole.

4. manually change selector switch K, input stake K-0 is connected with the electric K-3 of the 3rd output stake.At this moment, the 220V electric main provides electric energy by charger for mobile phone, so that LED fluorescent tube assembly ZJ is in the illumination condition of maximum brightness.

Order about LED fluorescent tube assembly ZJ and be the direct current of high illumination light-emitting, its route of flowing through is: the negative pole contact point of the 3rd terminals CZ-3 of the input stake K-0 of the 3rd output stake K-3 → selector switch K of the first terminals CZ-1 of the anodal contact point of the USB socket positive pole of charger for mobile phone output → USB plug positive pole → positive wire CT-1 → attachment plug CT → gang socket CZ → LED fluorescent tube assembly ZJ → selector switch K → gang socket CZ → attachment plug CT → cathode conductor CT-2 → USB plug negative pole → USB socket negative pole.

Because the use of mobile phone and charger for mobile phone thereof is very universal, there is these electrical equipment in nearly all family, therefore, adopt the LED light fixture of the circuit manufacturing of desk lamp of the present invention, such as the LED desk lamp, just do not need to dispose separately again charger or dc source, so can decrease manufacturing cost and selling price.

Even so, even if there is minority family not have charger for mobile phone, then charger for mobile phone no matter be manufacturer with the light fixture systems selling or the consumer buy voluntarily, because charger for mobile phone is globalization large-scale production, so have many benefits such as price is low, quality is high, maintenance is convenient.

Press the LED light fixture that present embodiment institute introduction method is made, very applicable to the area of frequent power failure; In the time of temporary interruption, with selector switch K be adjusted to relevant position, by rechargeable battery powered illumination; When not having a power failure, selector switch K is adjusted to correct position, in order to by 220V electric main powered lighting, perhaps electric energy is provided, rechargeable battery is charged by the 220V electric main.

Embodiment four

In above-described embodiment three, the charger for mobile phone role is the effect of a dc source, by the USB socket of charger for mobile phone output, and the direct current of output 5V voltage.

In the present embodiment, carrying the galvanic USB socket of 5V is the intrinsic USB socket of PC; Say that namely dc source is served as by the direct-flow voltage stabilizer in the PC.

As everyone knows, PC divides from profile, and two large types are arranged, and a class is desktop computer, and another kind of is notebook computer (also claiming laptop computer, portable computer), and the below is introduced respectively.

Desktop computer has display screen and main frame; Generally, display screen is placed on the table top, the arrangement that main frame has on the ground, on the shelf that is placed in table top lower-left side or lower right side that has, etc.Main frame is provided with a plurality of USB sockets, and these USB sockets can be exported the direct current of 5V voltage; Then the power line access 220V electric main of host computer is transported to the direct-flow voltage stabilizer input in the main frame, and this device has the electric energy output of multichannel, the direct current output of 5V voltage is wherein arranged and be sent to each USB socket.

Display screen and the main frame of notebook computer unites two into one, forms thus the main body of notebook computer, and its required electric energy is provided by the power source special adapter of notebook computer; The power source special adapter of notebook computer, the electric main of its input termination 220V, its output is sent to the main body of notebook computer by electric wire; In the main body of notebook computer, be provided with a plurality of USB sockets, the power source special adapter provides the direct current of 5V voltage to these USB sockets.

By above description as can be known, no matter be desktop computer or notebook computer, their intrinsic USB sockets can be exported the 5V direct current of certain magnitude of current.

In embodiment three, what USB plug inserted is in the USB socket of charger for mobile phone output; And in present embodiment four, what USB plug inserted is in the intrinsic USB socket of computer; Aforementioned computer can be desktop computer, also can be notebook computer.

Present embodiment is compared with embodiment three, different is: the former is the USB socket of computer, the latter is the USB socket of charger for mobile phone, remaining circuit begins from USB plug, the circuit of follow-up invention desk lamp is identical, and not only circuit structure is identical, and technique effect is also identical with using method, because the length relation no longer repeats to give unnecessary details.

Owing to used direct-flow voltage stabilizer and the UBS socket thereof of desktop computer, perhaps owing to used power source special adapter and the UBS socket thereof of notebook computer, just do not need to dispose separately again charger or dc source, so can decrease manufacturing cost and selling price.

Embodiment five

Describe in conjunction with Figure 13.

This Figure 13 compares with Figure 11 among the embodiment three, and one of different place is: the first battery B1, the second battery B2 and the 3rd battery B3 have been installed among Figure 11, and this three battery all is No. 5 rechargeable batteries, and every joint rechargeable battery is the 1.2V DC voltage; And among this Figure 13, do not have the first battery B1, the second battery B2 and the 3rd battery B3, and the electrical connection of relevant position is disconnected, shown in the small circle among Figure 13.

In Figure 13, positive wire CT-1 and cathode conductor CT-2, an end of these two wires links to each other with the USB plug USB-T of standard, and the other end links to each other with attachment plug CT in the attachment plug seat.USB plug is inserted in the USB socket, and has following a, b, c situation: a. the second terminals CZ-2 and the 3rd terminals CZ-3 to cut off electrical connection; B. the anodal contact point of attachment plug CT is electrically connected with the first terminals CZ-1 of gang socket CZ; C. the negative pole contact point of attachment plug CT is electrically connected with the second terminals CZ-2 of gang socket CZ.Other electrical connection situation as shown in figure 13.

Now, can insert USB plug the USB socket of general mobile phone charger output interface, perhaps can insert the intrinsic USB socket of desktop computer to USB plug, perhaps can insert the intrinsic USB socket of notebook computer to USB plug; Below introduced respectively.

The first situation .USB plug USB-T inserts general mobile phone charger USB socket USB-Z's, then the input termination 220V electric main of general mobile phone charger.Selector switch K is adjusted to input stake K-0 and the 3rd output stake K-3 electrical connection, LED fluorescent tube assembly ZJ high-brightness luminous; Selector switch K is adjusted to input stake K-0 and the second output stake K-2 electrical connection, and LED fluorescent tube assembly ZJ is low bright luminous; Selector switch K is adjusted to input stake K-0 and the first output stake K-1 electrical connection, and LED fluorescent tube assembly ZJ extinguishes; Selector switch K is adjusted to input stake K-0 and the 4th output stake K-4 electrical connection, and LED fluorescent tube assembly ZJ extinguishes.

The second situation .USB plug USB-T inserts the intrinsic USB socket USB-Z's of desktop computer, carries the direct current of 5V after the desktop computer start by USB socket.Selector switch K is adjusted to input stake K-0 and the 3rd output stake K-3 electrical connection, LED fluorescent tube assembly ZJ high-brightness luminous; Selector switch K is adjusted to input stake K-0 and the second output stake K-2 electrical connection, and LED fluorescent tube assembly ZJ is low bright luminous; Selector switch K is adjusted to input stake K-0 and the first output stake K-1 electrical connection, and LED fluorescent tube assembly ZJ extinguishes; Selector switch K is adjusted to input stake K-0 and the 4th output stake K-4 electrical connection, and LED fluorescent tube assembly ZJ extinguishes.

The third situation .USB plug USB-T inserts the intrinsic USB socket USB-Z's of notebook computer, carries the direct current of 5V after the notebook computer start by USB socket.Situation after selector switch K regulates in situation after selector switch K regulates and the above the second situation is identical, so no longer repeat.

Owing to used general mobile phone charger and USB socket thereof, perhaps owing to used direct-flow voltage stabilizer and the UBS socket thereof of desktop computer, perhaps owing to used power source special adapter and the UBS socket thereof of notebook computer, just do not need to dispose separately again charger or dc source, and be not equipped with any dry cell or rechargeable battery, and by 220V electric main supply of electrical energy, so greatly amplitude has reduced manufacturing cost and selling price.

The method of the above-mentioned introduction of present embodiment, adopt in the very applicable area that does not have a power failure.

Embodiment six

In the present embodiment, with the invention circuit application on desk lamp.Manufacturer according to the difference of electric power thus supplied, divides two types of configurations in the finished product packing box.

First kind configuration.

The first kind is configured to basic configuration; The desk lamp situation of basic configuration is as follows:

1. desk lamp main body: lampshade from top to bottom, lamp stand and lamp socket.2.LED the LED light emitting diode among the fluorescent tube assembly ZJ and resistance welded on printed substrate, and connect with the wire pair miscellaneous part; The printed substrate that is welded with the LED light emitting diode is arranged in the lampshade.3. do not have the first battery B1, the second battery B2 and the 3rd battery B3, but battery case and brace (the connection battery is used) thereof are arranged.4. positive wire CT-1 and cathode conductor CT-2, an end of these two wires links to each other with the USB plug USB-T of standard, and the other end links to each other with attachment plug CT in the attachment plug seat.5. the components and parts of other circuit all are shown in Figure 13, and properly install, are welded in the desk lamp main body.

Situation described above can be write as following literal: " described circuit comprises battery case; Described battery case comprises: battery case main body and the conductive connecting piece that is connected the battery connection; Conductive connecting piece, it is positioned at the battery case main body, and it is realized and being electrically connected of battery case main body outside by electric wire; Described the first battery B1, the second battery B2, the 3rd battery B3, this three batteries does not exist.”

From the situation of above introduction as can be known: the desk lamp of basic configuration does not have battery (both do not had dry cell, do not had a rechargeable battery yet), does not have dc source or similar device, such as fairing, power supply adaptor etc.; Aforesaid dc source etc. all can convert the 220V electric main to galvanic.

It is for sale that the desk lamp of first kind configuration can be used as complete desk lamp, and the area of its sale is in the place that does not have a power failure, particularly the consumer of own charger for mobile phone is particularly suitable.After during the buyer buys back home, attachment plug CT is inserted in the gang socket CZ, USB plug USB-T is inserted in the USB socket USB-Z of charger for mobile phone, the input of charger for mobile phone is linked to each other with the 220V electric main, so just can use, put bright desk lamp.

The economical and practical comprehensive analysis of first kind configuration LED desk lamp is as follows:

Owing to do not have battery, particularly do not have dc source (or similar device), so manufacturing cost and selling price are starkly lower than the common LED desk lamp of prior art.The common LED desk lamp refers to: directly use the LED desk lamp of 220V electric main, its inside is provided with continuous-current plant (or similar device), so that alternating current becomes direct current, to order about the LED fluorescent tube shinny; Also have, the common LED desk lamp can't use when having a power failure.

In addition, the place that does not have a power failure is not equal to anything but power failure; Also have, the shelter that does not have a power failure sometimes pulling wire less than the place illumination need to be provided, in these cases, as long as the user pack into three the joint dry cells just can deal with problems, so LED desk lamp or serve as emergency light and use, or serve as large-scale flashlight and use.

The Equations of The Second Kind configuration.

The Equations of The Second Kind configuration is on the basis of first kind configuration, and being equipped with increases by three joint rechargeable batteries again.The desk lamp of Equations of The Second Kind configuration, the area of its sale is particularly suitable in the place that often has a power failure.

The economical and practical comprehensive analysis of Equations of The Second Kind configuration LED desk lamp is as follows:

Because the LED desk lamp of Equations of The Second Kind configuration does not have dc source (or similar device), it is compared with the prior art desk lamp with function of emergency illumination, and its manufacturing cost and selling price obviously reduce.

Application invention circuit, the LED desk lamp that carries out the Equations of The Second Kind configuration when electricity is arranged, rely on the 220V electric main to light illumination, or rechargeable battery are charged; When having a power failure, rely on the rechargeable battery luminous lighting; If long-time the power failure, the electric energy of rechargeable battery also exhausts, and then available dry cell displacement rechargeable battery provides further emergency lighting with this.

Embodiment seven

That present embodiment will be introduced is the LED fluorescent tube assembly ZJ that consists of by the branch road mode.So-called branch road, its each branch road all has the character of following a and b:

A. each branch road comprises: a branch road current-limiting resistance RZX-1 and a LED LED-1; B. electrically connecting as of each branch road: the first battery B1 is anodal, branch road current-limiting resistance RZX-1, and the positive pole of LED LED-1, negative pole, the 3rd output stake K-3 of selector switch K, order is connected in series; Perhaps, the first battery B1 is anodal, the positive pole of LED LED-1, negative pole, and branch road current-limiting resistance RZX-1, the 3rd output stake K-3 of selector switch K, order is connected in series.

Consist of the branch road of LED fluorescent tube assembly ZJ, its quantity can be one, also can be two, or more branch roads.Situation shown in Figure 1 is: the LED fluorescent tube assembly ZJ that is made of a branch road; Situation shown in Figure 3 is: the LED fluorescent tube assembly ZJ that is made of two branch roads; Situation shown in Figure 4 is: by the LED fluorescent tube assembly ZJ that N bar branch road consists of, N herein is more than or equal to 3.

Just as shown in Figure 3 and Figure 4, between each branch road be annexation in parallel.

Embodiment eight

Present embodiment will be introduced LED fluorescent tube assembly ZJ, and it comprises a total current-limiting resistance RZ and plural LED LED-1.

LED fluorescent tube assembly ZJ among Fig. 5, it comprises a total current-limiting resistance RZ and two LED LEDs-1; LED fluorescent tube assembly ZJ among Fig. 6, it comprises a total current-limiting resistance RZ and N LED LED-1, aforesaid N is more than or equal to 3.

As Fig. 5, Fig. 6 express, all LED LEDs-1, they in the same way parallel connection become LED row, in other words, all LED LEDs-1, their positive pole is connected, their negative pole is connected.

The first battery B1 is anodal, total current-limiting resistance RZ, and LED row is anodal, negative pole, the 3rd output stake K-3 of selector switch K, order is connected in series.

Embodiment nine

Take situation shown in Figure 6 as example, the configuration of relevant components and parts in the circuit is described.

The quantity of LED light emitting diode is 50, i.e. N=50.The model of LED light emitting diode, diameter is 5mm, and is direct insertion, white light, straw hat type.The resistance of total current-limiting resistance RZ is 0.3 ohm～0.75 ohm, need to adjust and determine, because each batch, and the LED light emitting diode parameter of each producer in the scope that meets the index of dispatching from the factory, exist inconsistent, even it is inconsistent that same producer, same batch also exist, so the resistance of total current-limiting resistance RZ needs to adjust.

The first battery B1, the second battery B2 and the 3rd battery B3 are rechargeable battery that nominal value is 1.2V, No. 5.

The first diode, its model is 1N4007, the nominal value of its forward conduction tube voltage drop is 0.7V; The second diode D2, its model is 1N5819, the nominal value of its forward conduction tube voltage drop is 0.3V.

The model of selector switch K is that KAN16 or KAN17 all can.

The resistance of the first current-limiting resistance R1 is 2.7K ohm; The resistance of the second current-limiting resistance R2 is 0.82 ohm; The resistance of the 3rd current-limiting resistance R3 is 1K ohm; The resistance of the 4th current-limiting resistance R4 is 8.2 ohm.

The model of LED light LED-Z, diameter is 3mm, and is direct insertion, ruddiness is bullet-shaped.

Embodiment ten

Desk lamp in the present embodiment is such as Figure 15, Figure 16, Figure 17 and shown in Figure 180.Figure 15 is the front view of invention desk lamp; Figure 16 is the right view of Figure 15; Figure 17 is the left view of Figure 15; Figure 18 is the separation graph of Figure 15.

Shown in above-mentioned four figure; The LED desk lamp comprises: LED fluorescent tube assembly ZJ, lampshade 1, lamp stand, lamp socket 4, circuit; The top of lamp stand and lampshade 1 are rotationally connected, and the bottom of lamp stand and lamp socket 4 are rotationally connected; The benefit that is rotationally connected is the convenient orientation angle etc. of regulating.Wherein, in Figure 15, label 5 is light-passing boards, and label LED-1 is the LED light emitting diode, and light emitting diode is a plurality of, after energising, and their luminous illuminations.

Lamp stand comprises: the body of rod, LED light LED-Z, battery case, attachment plug seat, selector switch K, the first battery B1, the second battery B2, the 3rd battery B3.The front end of LED light LED-Z is emerging in the front surface of the body of rod; So can allow the user observe easily situation, the brightness by LED light changes and by the lighting or extinguish variation of indicator lamp, grasps the various correlation circumstances of desk lamp.The surface of selector switch K is exposed to the front surface of the body of rod, so that the user presses selector switch K, is correlated with in needs selection pass change.

The body of rod comprises: pre-structure body 2, rear structure 3, battery case cover plate, printed substrate 8, conduction union piece group 7.

Below, emphatically the frame for movement of the body of rod is introduced and illustrates.

Among Figure 15 and Figure 18, all drawing has pre-structure body 2 and rear structure 3; In fact, two structures of this that is fixedly connected with have consisted of the main body of the body of rod, and in other words, on frame for movement, these two structures have upper with lampshade 1 is rotationally connected, descend and function that lamp socket 4 is rotationally connected.

For content well arranged, that the meaning is clearly expressed narration, the below is introduced respectively related content.

1. about pre-structure body 2.

For pre-structure body 2, can understand referring to Figure 23 to Figure 25.Figure 23 is the front view of pre-structure body; Figure 24 is the left view of Figure 23; Figure 25 is the right view of Figure 23.

, offer in the position at the front surface place of pre-structure body 2: be used for installing the indication installing hole of LED light LED-Z, be used for installing the switch installing hole of selector switch K to shown in Figure 25 such as Figure 23; Bossed erection column 10 is established at the back of pre-structure body 2, and this erection column 10 is used for installing printed substrate 8.

2. about rear structure 3.

For rear structure 3, can understand referring to Figure 19 to Figure 22.Figure 19 is the front view of rear structure; Figure 20 is the left view of Figure 19; Figure 21 is the right view of Figure 19; Figure 22 is the cutaway view of Figure 19.

To shown in Figure 22, be provided with battery case agent structure in the rear structure 3 such as Figure 19; This battery case agent structure is the rectangular cavity structure, and rectangular cavity caves in forward and opens wide backwards; The rectangular cavity structure comprises: upper wall 6-1, lower wall 6-2, left wall 6-3, right wall, diapire 6-4.

Battery case is provided for the mouth that picks and places of fetching battery, picks and places the back side that mouth is positioned at the body of rod, shown in Figure 17 and Figure 20 etc.

The first battery B1, the second battery B2 and the 3rd battery B3 are dry cell No. 5, every joint 1.5V; This three joints dry cell is arranged in battery case (dry cell 17 omits picture in the drawings).Be provided with conduction union piece group 7 in the battery case; Three joint dry cells in the battery case need the electrical connection between the foundation mutually, need in addition to set up the inside and outside electrical connection of battery case; For this reason, also adopt the way of prior art, with several electric connecting sheets positive pole, the negative pole at dry cell two ends are set up electrical communication, for this reason, also take conventional way: the dry cell positive pole is supported connection with the raised points on the electric connecting sheet, dry battery cathode is also wanted to support connection with little spring in addition, in addition, the connection of also being correlated with electric wire finally realizes required electrical connection.

The battery case cover plate is installed at the place of opening wide backwards of rectangular cavity; Be provided with the hole clipping bayonet arrangement between rear structure 3 and the cover plate, realize snap-in installation by the hole clipping bayonet arrangement.Illustrate: among the relevant figure battery case cover plate, hole clipping bayonet arrangement are not all omitted picture.

3. about gang socket CZ and installing card bit architecture thereof.

Gang socket CZ in the present embodiment is referring to Figure 26 to Figure 29.Figure 26 is the front view of gang socket; Figure 27 is the left view of Figure 26; Figure 28 is the right view of Figure 26; Figure 29 is the top view of Figure 26.Aforementioned four figure all omit picture to each terminals of gang socket CZ.

From four figure of Figure 26 to Figure 29 as can be known: the structure of gang socket CZ comprises jack CZ-K and draw-in groove CZ-C is installed.Draw-in groove CZ-C utilize to be installed, gang socket CZ can be fixed between pre-structure body 2 and the rear structure 3, and the jack CZ-K that makes gang socket CZ down.

Its concrete way is: in pre-structure body 2, perhaps in rear structure 3, perhaps the while is offered breach in these two structures, so that the wall body of indentation, there embeds the installation draw-in groove CZ-C of gang socket CZ.In Figure 30, in rear structure 3, offer breach, the installation draw-in groove CZ-C of gang socket CZ embeds breach, and then pre-structure body 2 and rear structure 3 close up, and then gang socket CZ just is stuck, has fixed, as shown in figure 31.And for example among Figure 34, offer breach in pre-structure body 2, the installation draw-in groove CZ-C of gang socket CZ embeds breach, and then pre-structure body 2 and rear structure 3 close up, and then gang socket CZ just is stuck, has fixed, as shown in figure 35.Also have, among Figure 32, pre-structure body 2 and rear structure 3 are all offered breach half, and the installation draw-in groove CZ-C of gang socket CZ embeds breach, and after pre-structure body 2 and rear structure 3 closed up, gang socket CZ just was stuck, has fixed, as shown in figure 33.

In more than introducing, no matter whether offer breach in the pre-structure body 2, and whether offer breach in the rear structure 3, all be considered to be provided with retaining structure, and jointly consisted of complete installing card bit architecture with another structure; Because the structure of gap has not played the effect of blocking, fixing jointly yet.

Desk lamp in the present embodiment after having finished assembling and debugging, can use dry cell, presses selector switch K, lights the LED led lighting.This moment, desk lamp was dry cell owing to what use, used so can serve as large-scale flashlight, or served as emergency light and use.

Claims

1. a LED desk lamp comprises: LED fluorescent tube assembly (ZJ), lampshade (1), lamp stand, lamp socket (4), circuit; Described lamp stand, its top is connected with lampshade (1), and its underpart is connected with lamp socket (4);

It is characterized in that: described lamp stand comprises: the body of rod, LED light (LED-Z), battery case, attachment plug seat, selector switch (K), the first battery (B1), the second battery (B2), the 3rd battery (B3);

Described the first battery (B1), the second battery (B2), the 3rd battery (B3), this three all is positioned at battery case;

Described LED light (LED-Z), its fluorescent tube front end is emerging in the front surface of the body of rod;

Described selector switch (K), its surface is exposed to the front surface of the body of rod; Selector switch (K) comprising: input stake (K-0), the first output stake (K-1), the second output stake (K-2), the 3rd output stake (K-3), the 4th output stake (K-4);

Described attachment plug seat comprises: attachment plug (CT), gang socket (CZ), positive wire (CT-1), cathode conductor (CT-2); Described attachment plug (CT) has anodal contact point and negative pole contact point;

Positive wire (CT-1), the one end is electrically connected with the anodal contact point of attachment plug (CT), and its other end is electrically connected with the positive terminal of dc source output; Cathode conductor (CT-2), the one end is electrically connected with the negative pole contact point of attachment plug (CT), and its other end is electrically connected with the negative pole end of dc source output;

Gang socket (CZ) is positioned at the downside of battery case; Gang socket (CZ) has three terminals, and three terminals are respectively: the first terminals (CZ-1), the second terminals (CZ-2), the 3rd terminals (CZ-3);

When gang socket (CZ) was extracted in attachment plug (CT), the second terminals (CZ-2) in the gang socket (CZ) and the 3rd terminals (CZ-3) were electrically connected;

When in a single day attachment plug (CT) is inserted gang socket (CZ) after, just have a, b, c situation to occur in the lump: a. the second terminals (CZ-2) and the 3rd terminals (CZ-3) cut off and are electrically connected; The anodal contact point of b. attachment plug (CT) is electrically connected with first terminals (CZ-1) of gang socket (CZ); The negative pole contact point of c. attachment plug (CT) is electrically connected with second terminals (CZ-2) of gang socket (CZ);

First terminals (CZ-1) of gang socket (CZ), the first battery (B1) is anodal, negative pole, the second battery (B2) is anodal, negative pole, the 3rd battery (B3) is anodal, negative pole, second terminals (CZ-2) of gang socket (CZ), they sequentially are connected in series;

First terminals (CZ-1) of gang socket (CZ), the 3rd current-limiting resistance (R3), LED light (LED-Z) is anodal, negative pole, the first output stake (K-1) of selector switch (K), order is connected in series, perhaps, first terminals (CZ-1) of gang socket (CZ), LED light (LED-Z) is anodal, negative pole, the 3rd current-limiting resistance (R3), the first output stake (K-1) of selector switch (K), order is connected in series;

The 3rd battery (B3) positive pole, the first diode (D1) negative pole, positive pole, the first current-limiting resistance (R1), the first output stake (K-1) of selector switch (K), order is connected in series, perhaps, the 3rd battery (B3) positive pole, the first current-limiting resistance (R1), the first diode (D1) negative pole, positive pole, the first output stake (K-1) of selector switch (K), order is connected in series; The 3rd battery (B3) negative pole, the second diode (D2) is anodal, negative pole, the second current-limiting resistance (R2), the first output stake (K-1) of selector switch (K), order is connected in series, perhaps, the 3rd battery (B3) negative pole, the second current-limiting resistance (R2), the second diode (D2) is anodal, negative pole, the first output stake (K-1) of selector switch (K), order is connected in series;

Described LED fluorescent tube assembly (ZJ), the one end is electrically connected with the first battery (B1) is anodal, and its other end is electrically connected with the 3rd output stake (K-3) of selector switch (K).

2. a kind of LED desk lamp according to claim 1 is characterized in that: described the first battery (B1), and the second battery (B2), the 3rd battery (B3), the facilities of this three battery are any one among the following three:

A. this three battery is the 1.2V rechargeable battery;

B. this three battery is the dry cell of 1.5V;

3. a kind of LED desk lamp according to claim 1 is characterized in that: described dc source, and its inside comprises: rectification circuit, filter circuit, direct current regulation circuit; The input of dc source links to each other with electric main, and dc source is by positive terminal and negative pole end output DC, and galvanic magnitude of voltage is 5V ± 5%.

4. a kind of LED desk lamp according to claim 1, it is characterized in that: described desk lamp comprises: USB plug (USB-T) has a USB socket (USB-Z) with USB plug (USB-T) is matching used; Described positive wire (CT-1), its head end is electrically connected with the positive terminal of USB plug (USB-T), and its tail end is electrically connected with the anodal contact point of attachment plug (CT); Described cathode conductor (CT-2), its head end is electrically connected with the negative pole end of USB plug (USB-T), and its tail end is electrically connected with the negative pole contact point of attachment plug (CT);

Described dc source and described USB socket (USB-Z) are any one in following four:

A. described dc source is direct current output type power supply adaptor, and the output of direct current output type power supply adaptor is by USB socket (USB-Z) output DC;

B. described dc source is charger for mobile phone (SC), and the output of charger for mobile phone (SC) is by USB socket (USB-Z) output DC;

C. described dc source is the D.C. regulated power supply in the personal desktop computer; D.C. regulated power supply, its input links to each other with AC power, and its output is by intrinsic USB socket (USB-Z) output DC of personal desktop computer;

D. described dc source is the DC power supply apparatus of notebook computer; DC power supply apparatus, its input links to each other with AC power, and its output links to each other with notebook computer; Notebook computer is by intrinsic USB socket (USB-Z) output DC;

Among above-mentioned a, b, c, the d, the USB socket (USB-Z) in its any technical scheme, all by with being connected of USB plug (USB-T), realize output DC.

5. a kind of LED desk lamp according to claim 1, it is characterized in that: described LED fluorescent tube assembly (ZJ) comprises more than one branch road; Two above branch roads, each branch road is for being connected in parallel;

Each branch road all has following a and b character:

A. each branch road comprises: a branch road current-limiting resistance (RZX-1) and a LED light emitting diode (LED-1);

B. electrically connecting as of each branch road: the first battery (B1) positive pole, branch road current-limiting resistance (RZX-1), positive pole, the negative pole of LED light emitting diode (LED-1), the 3rd output stake (K-3) of selector switch (K), order is connected in series; Perhaps, the first battery B1 is anodal, positive pole, the negative pole of LED light emitting diode (LED-1), and branch road current-limiting resistance (RZX-1), the 3rd output stake (K-3) of selector switch (K), order is connected in series.

6. a kind of LED desk lamp according to claim 1, it is characterized in that: described LED fluorescent tube assembly (ZJ) comprising: a total current-limiting resistance (RZ), plural LED light emitting diode (LED-1);

All LED light emitting diodes (LED-1), they in the same way parallel connection become LED row; In other words, all LED light emitting diodes (LED-1), their positive pole is connected, and their negative pole is connected;

The first battery (B1) positive pole, total current-limiting resistance (RZ), LED row is anodal, negative pole, the 3rd output stake (K-3) of selector switch (K), order is connected in series; Perhaps, the first battery (B1) positive pole, LED row is anodal, negative pole, total current-limiting resistance (RZ), the 3rd output stake (K-3) of selector switch (K), order is connected in series.

7. a kind of LED desk lamp according to claim 1, it is characterized in that: described battery case comprises: battery case main body (6), conduction union piece group (7), lid; By conduction union piece group (7), realize that the first battery (B1) is anodal, negative pole, the second battery (B2) is anodal, negative pole, and the 3rd battery (B3) is anodal, negative pole sequentially is electrically connected in series, and realizes again being electrically connected inside and outside the box; Lid is positioned at the opening part of battery case main body (6); Battery case main body (6) is integrally manufactured with the body of rod; Perhaps, battery case main body (6) and body of rod split are made, after split is made again with battery case main body (6) and body of rod split assembly connection.

8. a kind of LED desk lamp according to claim 1 is characterized in that: described lamp stand, and its top and lampshade (1) are rotationally connected, and its underpart and lamp socket (4) are rotationally connected;

The body of rod comprises: pre-structure body (2), rear structure (3), battery case cover plate, printed substrate (8), conduction union piece group (7); Pre-structure body (2) is fixedly connected with rear structure (3);

Position at the front surface place of pre-structure body (2) is offered: be used for installing the indication installing hole of LED light (LED-Z), be used for installing the switch installing hole of selector switch (K); Bossed erection column (10) is established at the back of pre-structure body (2), and this erection column (10) is used for installing printed substrate (8); The lower position at pre-structure body (2) back is provided with the first retaining structure, and the first retaining structure indicates installing hole, switch installing hole and erection column (10) three all upper lower;

Rear structure is provided with the battery case agent structure in (3); Described battery case agent structure is the rectangular cavity structure, and rectangular cavity caves in forward and opens wide backwards; The rectangular cavity structure comprises: upper wall (6-1), lower wall (6-2), left wall (6-3), right wall, diapire (6-4);

The battery case cover plate is installed at the place of opening wide backwards of rectangular cavity; Described installation refers to realize installing by mounting screw, and perhaps, described installation refers to be provided with the hole clipping bayonet arrangement between rear structure (3) and the cover plate, realizes snap-in installation by the hole clipping bayonet arrangement;

Described gang socket (CZ), its structure comprises: jack (CZ-K) and installation draw-in groove (CZ-C); Described rear structure (3), position, its underpart is provided with the second retaining structure; Described the first retaining structure and the second retaining structure are corresponding to arrange the installing card bit architecture of these two retaining structure completes; By draw-in groove (CZ-C) and complete installing card bit architecture are installed, gang socket (CZ) is connected with the body of rod connecting; Gang socket after the connection (CZ), its jack (CZ-K) down.

9. a kind of LED desk lamp according to claim 1, it is characterized in that: described the first diode (D1), the nominal value of its forward conduction tube voltage drop are 0.7V; Described the second diode (D2), the nominal value of its forward conduction tube voltage drop are 0.3V.