CN113074330A

CN113074330A - Professional desk lamp of linkage balance adjustable height distance

Info

Publication number: CN113074330A
Application number: CN202110469055.7A
Authority: CN
Inventors: 张健武
Original assignee: Beijing City Fashion Education Technology Co ltd
Current assignee: Beijing City Fashion Education Technology Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-07-06

Abstract

The invention discloses a professional table lamp capable of adjusting height and distance through linkage balance, and belongs to the field of lighting lamps. This desk lamp includes: the gravity handle, the balancing rod, the clamping device and the balancing hinge piece form a balancing end, the lamp holder and the angle adjuster, the lamp holder and the lamp holder hinge rod form a lamp holder end, and the balancing hinge piece, the linkage rod, the lamp holder hinge rod, the hinge A, B, C, D, the linkage mechanism seat, the outer circle surface of the seat and the linkage mechanism cover form a linkage mechanism which is provided with a supporting rod lamp holder; the balance end swings and positions up and down within 90 degrees through a linkage mechanism, and drives the linkage rod to drive the lamp holder hinge rod and the lamp holder end to swing and position reversely and synchronously, and the linkage mechanism is connected with the lamp holder with the support rod; the invention utilizes the balance end to balance the gravity of the lamp holder in a linkage manner by adopting the gravity-torque balance principle through the linkage mechanism, overcomes the lodging problem caused by the gravity of the lamp holder, conveniently realizes the adjustment of the height and the distance of the light source, and expands the use and the efficiency of the lamp in special occasions.

Description

Professional desk lamp of linkage balance adjustable height distance

Technical Field

The invention relates to the field of lighting lamps, in particular to a linkage-balanced professional desk lamp with adjustable height and distance.

Background

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

many table lamps in the prior art are suitable for incandescent lamps, energy-saving lamps and LED light sources, and are not suitable for electrodeless lamp light sources, infrared irradiation light sources, spectrum irradiation sources and other special occasions with high requirements on heavy lamp holders;

the prior art incandescent lamp light source desk lamp is reduced in use because the incandescent lamp does not save energy;

in the prior art, the energy-saving lamp is used less and less because the energy-saving lamp also has stroboflash and radiation;

in the table lamp with the LED light source in the prior art, the problems of eyesight and health damage caused by blue light, stroboflash, radiation, dazzling light, color cast and the like exist in the LED light source, and the illumination quality is influenced due to low color rendering property. The world health organization WHO loving eyes association publishes: more than 30000 worldwide are blinded each year from 2006 to 2008 due to blue light radiation. According to the data display of the ophthalmology conference of the Chinese medical society: among 4.2 hundred million net citizens in China, 63.5% of net citizens have eye diseases with different degrees such as visual deterioration, cataract, blindness and the like due to blue light and radiation. The existing research shows that the long-time exposure in high-intensity blue light in one day aggravates the retinal macular region diseases, causes the eyeground injury after cataract operation, causes blurred vision and glare, inhibits the secretion of melatonin, disturbs sleep and increases the incidence rate of serious diseases of human bodies. In the conventional white light LED light source for illumination, after the blue light LED excites the yellow fluorescent powder, white light is generated, the spectral curve of the white light is not smooth, particularly, the peak value of the blue light wave band is obviously higher than that of natural light or an incandescent lamp, the obtained white light spectrum has more blue light weight, and the over-strong blue light has harm to human eyes; in recent years, LED illumination light sources widely replace conventional illumination light sources as desk lamp light sources.

The desk lamp in the prior art is mostly of a single cantilever beam type structure, is only a simpler structure for balancing the gravity moment of a lamp holder and the moment of a lamp holder, and can only adapt to light point light sources with lighter mass, such as incandescent lamps, LED light sources and occasions with low requirements on span height;

in the prior art, the desk lamp based on the balance rod principle, the desk lamp based on the pulley device and the desk lamp with weights cannot meet the requirements of rapidness, simplicity, low cost and complicated professional environment due to complicated adjustment;

the invention provides a new application technical scheme, which can widely meet the requirements of occasions needing background light and long-distance illumination for long-time use, such as: the system is used for counteracting professional background light of blue light of a computer screen, repairing cultural relics and ancient sites with high requirements on color rendering, distinguishing colors of photographic lighting, food materials, cloth, paper and printing, maintaining equipment and protecting health, and meeting certain high requirements and complex environments;

the invention relates to a special desk lamp which is placed stably, is convenient to adjust the illumination height and distance quickly, and is particularly suitable for special purposes such as elimination of the problems of damage to vision and health caused by blue light, stroboflash, radiation, glare, color cast and the like, more healthy and high-color-rendering electrodeless lamps compared with natural sunlight, infrared treatment light sources with larger weight, spectrum treatment instruments and the like.

Disclosure of Invention

In order to solve the problem that the desk lamp in the prior art cannot meet the wide use requirement of special purpose and special heavy mass light sources due to the limitation of a moment structure, the embodiment of the invention provides a professional desk lamp with symmetrical linkage balance and adjustable height distance, and the technical scheme is as follows:

the invention provides a professional desk lamp, which comprises: the lamp holder comprises a balance end consisting of a gravity handle, a balance rod, a clamp and a balance hinge piece, a lamp holder end consisting of a lamp holder and angle adjuster, a lamp holder hinge rod, a linkage mechanism consisting of a balance hinge piece, a linkage rod, a lamp holder hinge rod, a hinge A, a hinge B, a hinge C, a hinge D, a linkage mechanism seat and an outer circular surface of the linkage mechanism seat, and a lamp holder with a support rod, a power line, a switch and a plug;

the lamp head end is formed by connecting the light source lamp head, the lamp head angle adjuster, the lamp post and the lamp head hinge rod, wherein the axis of the lamp post is vertically and fixedly connected with the axis connecting line of the hinge D and the hinge C of the lamp head hinge rod;

the gravity handle, the balance rod, the balance hinge piece, the elastic bolt and the clamp form a balance end, wherein the axis of the balance rod is parallel to the axis connecting line of a hinge A and a hinge B of the balance hinge piece and has a certain distance;

the balance end is screwed through the tightening bolt and the balance handle to enable the clamp sleeved on the balance hinge piece to be positioned at the position of the outer circular surface of the linkage mechanism base, and meanwhile, the positions of the lamp holder end and the balance end are locked and loosened, otherwise, the clamp can be unlocked;

the lamp holder hinge rod, the hinge D, the hinge C, the balance hinge piece, the hinge B, the hinge A, the clamp, the linkage rod, the linkage mechanism seat, the outer circular surface of the linkage mechanism seat and the linkage mechanism seat cover plate form a linkage mechanism;

the linkage mechanism forms linkage and braking of 90-degree symmetrical up-and-down motion of the lamp holder end and the balance end in the horizontal and vertical directions, and when the balance end swings up and down, the linkage rod is driven to synchronously drive the lamp holder end to swing up and down by 90-degree symmetrical up and down;

the balance end swings horizontally and vertically by 90 degrees around the axis of the hinge A on the linkage mechanism seat through the balance hinge sheet, the swinging angle and acting force drive the linkage rod through the hinge B, and the linkage rod synchronously transmits through the hinge C to drive the lamp cap hinge rod to swing 90 degrees around the hinge D shaft on the linkage mechanism seat;

when the balance end swings to a horizontal position on the linkage mechanism seat around the axis A of the hinge, the balance end is blocked by a horizontal tangent plane of the linkage mechanism seat, and the lamp holder end stays on a horizontal plane in a linkage manner;

the vertical height of the horizontal section of the linkage mechanism seat relative to the hinge hole A determines that the balance end and the lamp head end are in or close to the horizontal position;

the lamp cap end is symmetrically linked with the balance end to swing up and down by 90 degrees and stop and position by the action force and the motion angle transmitted by the linkage rod and received by the lamp cap hinge rod;

the linkage mechanism seat is characterized in that a circular plane is vertically arranged at a circular cutting position, a hinge D hole and a hinge A hole are formed in the circular plane from top to bottom, the axis connecting line of the two holes is vertical or approximately vertical to the circular cutting horizontal plane of the linkage mechanism seat and the horizontal plane of a lamp holder, the distance between the axis of the hinge A and the circular cutting horizontal plane is equal to or larger than the outer dimension from the axis of the hinge A to the bottom end of a balance hinge piece, and a space is reserved for enabling a balance end to swing by 90 degrees;

when the axis of the balance rod moves to a position vertical to the circular cutting horizontal plane, the distance from the hinge A on the linkage mechanism seat to the axis of the hinge D is equal to or slightly greater than the distance from the axis of the hinge A to the outer diameter of the hinge B and the outer diameter of the lamp holder hinge rod hinge D, so that the balance hinge piece does not block when moving to the vertical position;

the length of a connecting line of an axis of a hinge D to a hinge C on a lamp holder hinge rod is equal to the length of a connecting line of an axis of a hinge A to a hinge B on a balance hinge piece, the connecting line of the axis of the hinge D to the axis of the hinge C on the lamp holder hinge rod is set as a right-angle side, the connecting line of the axis of the hinge B on the balance hinge piece forms another right-angle side when the hinge D is at a vertical position of a balance end, two right-angle sides of a right-angle triangle are formed, the length of the axis of the hinge B to the hinge C of a linkage rod is the hypotenuse of the right-angle triangle, a mathematical collusion theoretic relation is formed, namely, the square;

the circle center of the linkage mechanism seat is the axis of the hinge A, the radius of the linkage mechanism seat is equal to or slightly larger than the distance from the axis of the hinge A on the balance hinge piece to the bottom end face of the balance hinge piece and the sleeving clamping device, and the clamping device is screwed and locked or unlocked by a handle at the balance end to realize the locking or unlocking of the balance end and the lamp head end in the 90-degree swinging process;

the outer circle surface of the linkage mechanism seat is parallel to the axis of the circle, and the outer circle surface can be subjected to knurling treatment and acts as a clamp to lock the adjusting positions of the balance end and the lamp holder end;

the linkage mechanism base is provided with a linkage mechanism base cover plate with the same circular diameter, circular cut and outer circular surface, the outer circular surface of the cover plate can play a role of a locking auxiliary surface for the clamping device at the balance end in a locking state, the linkage mechanism base cover plate is connected with the linkage mechanism base on the circular cut surface, and the linkage mechanism base is connected with the linkage mechanism base above the circular cut surface in a supporting strength;

the lower end of the linkage mechanism seat is provided with a circular cut which is horizontally arranged and is connected with the upper plane of the lamp holder with the supporting rod;

the support rod with the support rod lamp holder is provided with a cavity, and power line leading-in and leading-out holes are formed in two ends of the cavity; the power line can be connected with a desk lamp switch;

the lamp post is provided with a cavity, and power line leading-in and leading-out holes are formed in two ends of the cavity; the power line is connected with the lamp holder through the lamp pole hollow channel and the lamp holder angle adjuster hollow channel in sequence, and the other end part of the power line extending out of the lamp pole is provided with a sheath which bypasses the linkage mechanism and is directly connected with the power line hole of the lamp holder supporting rod in a leading-in mode;

optionally, the table lamp further comprises: a power line, a plug and a power switch;

optionally, the lamp cap can be provided with a heavy-mass light source such as an electrodeless lamp with a surface light source, a far infrared therapeutic apparatus, a spectrum therapeutic apparatus and the like;

optionally, the gravity handle is made of metal or sand;

the technical scheme provided by the invention has the beneficial effects that: the lamp holder end and the balance end of the special desk lamp can be balanced symmetrically in weight, can be linked symmetrically to freely swing and be locked and positioned within a 90-degree range, and the lamp holder can adapt to light sources and irradiation sources with heavier mass, such as electrodeless lamps, far infrared therapeutic instrument light sources, spectrum therapeutic instrument irradiation sources and the like;

the linkage machine is used for linkage and positioning of the lamp holder end and the balance end of the professional desk lamp with the configuration cost, and when the balance end moves up and down, the linkage rod is driven to drive the lamp holder end to move up and down in a symmetrical linkage manner so as to change the lighting height and distance of the lamp holder. The adjusted height and distance can be fixed by screwing the balance handle. The problems of time waste, lamp part loss and influence on the service life of the desk lamp are conveniently and quickly solved without complex and redundant actions, so that the effects of expanding the use range of the desk lamp, meeting various complex and special lighting requirements and prolonging the service life of the desk lamp are achieved;

the invention relates to a professional special desk lamp which is stable to place and convenient to adjust the illumination height and distance quickly, and is particularly suitable for special purposes such as an electrodeless lamp, far infrared treatment light sources with larger weight, a spectrum therapeutic apparatus and the like, which can avoid the problems of damage to vision and health caused by blue light, stroboflash, radiation, glare, color cast and the like. This specialty desk lamp can extensively satisfy some long-time uses, to the occasion that background light and long distance illumination very need, if: background light for relieving eye fatigue, cultural relic identification and restoration, color identification of photographing illumination, jade, food materials, cloth, paper and printing, equipment maintenance and some environments with complex requirements are arranged at the upper back part of a computer operator.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;

fig. 1 is a schematic structural diagram of a professional desk lamp 001 according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of components of a professional desk lamp 001 according to an embodiment of the present invention;

fig. 3 is a schematic component structural diagram of the lamp end 100 provided in the embodiment shown in fig. 2;

FIG. 4 is a schematic diagram of the components of the balance end 200 provided in the embodiment of FIG. 2;

FIG. 5 is a schematic diagram of an adjustment member of a linkage 300 provided in the embodiment of FIG. 2;

fig. 6 is a schematic structural view of a base hinge member provided in the embodiment of fig. 2;

FIG. 7 is a schematic diagram of a configuration of a counterbalancing hinge member provided by the embodiment of FIG. 2;

fig. 8 is a schematic structural diagram of a lamp socket 400 with a support rod according to the embodiment shown in fig. 2;

fig. 9 is a schematic view of the linkage 300, the linkage cover 307 and the post-bearing lampholder 400 according to the embodiment of fig. 2;

fig. 10 is a schematic diagram of moment balance of lighting height and distance adjusting weight of a professional desk lamp provided by the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings;

referring to fig. 2, a schematic diagram of the components of a professional desk lamp 001 according to an embodiment of the present invention is shown, where the professional desk lamp includes: the lamp comprises a light source lamp holder 101, a lamp holder angle adjuster 102, a lamp post 103, a lamp holder hinge rod 104, a hinge A301, a hinge B302, a gravity handle 201, a balance rod 202, a clamp 203, a balance hinge piece 204, a hinge C303, a hinge D304, a linkage rod 305, a linkage mechanism seat 306, a linkage mechanism seat cover 307, a linkage mechanism seat outer circular surface 308, a support rod 401, a base 402, a power switch 403 and a lamp holder 400 with the support rod;

referring to fig. 3, the professional desk lamp 001 includes: the lamp head 100 consists of a light source lamp head 101, a lamp head angle adjuster 102, a lamp pole 103 and a lamp head hinge rod 104;

referring to fig. 4, the professional desk lamp 001 includes: the balance end 200 is composed of a gravity handle 201, a balance rod 202, a clamper 203 and a balance hinge piece 204;

referring to fig. 5, the professional desk lamp 001 includes: the linkage mechanism 300 is composed of a lamp holder hinge rod 104, a hinge A301, a hinge B302, a balance hinge piece 204, a clamper 203, a hinge 303, a hinge D304, a linkage rod 305, a linkage mechanism seat 306, a linkage mechanism seat cover 307 and a linkage mechanism seat outer circular surface 308;

referring to fig. 2 and 5, the connection relationship of the professional desk lamp 001 is as follows: the lamp holder end 100 is connected with a hinge D on the linkage mechanism 300 through the lamp holder hinge rod 104 and swings around the hinge D, the balance end 200 is connected with a hinge A on the linkage mechanism 300 through the balance hinge piece 204 and swings around the hinge A, a hinge C303 on the linkage rod 305 is connected with a hinge C of the lamp holder hinge rod 104, and a hinge B302 on the linkage rod 305 is connected with a hinge B of the balance hinge piece 204;

further, as shown in fig. 2 and 5, after the balancing end 200 of the professional desk lamp 001 loosens the clamp 203 sleeved on the balancing hinge plate, the hinge a of the balancing hinge plate 204 swings up and down by 90 degrees around the hinge a on the linkage mechanism seat 306, the hinge B of the balancing hinge plate 204 and the linkage rod 305 drives the linkage rod 305, and the hinge C of the linkage rod 305 and the lamp holder hinge rod 104 drives the lamp holder hinge rod 104 to swing synchronously by 90 degrees around the hinge D of the linkage mechanism seat, so that the balancing hinge plate 204 and the lamp holder hinge rod 104 synchronously link on the plane of the linkage mechanism seat 306, the balancing end and the lamp holder end are symmetrically linked by 90 degrees in the positive and negative directions, and the height and distance of the lamp holder end are adjusted;

it should be noted that fig. 6 illustrates a structure of the lamp holder hinge rod assembly, where a connection line between the axes of the hinge D and the hinge C is perpendicular to or close to perpendicular to the axis of the lamp holder rod, and in fact, the axis of the lamp holder rod may be fixedly connected at any position of the connection line between the axes of the hinge D and the hinge C to form an inverted L-shaped rod, an inverted T-shaped rod, etc., and other structures, such as a positive F-shaped rod, a T-shaped rod, etc., and the embodiments of the present invention do not specifically limit the derived shapes thereof;

it should be noted that fig. 7 illustrates a structure of a balance hinge piece assembly as an example, wherein the connection line between the axes of the hinge a and the hinge B of the balance hinge piece 204 is parallel to the axis of the balance rod and is formed at a distance so as to allow the axis of the balance rod to be away from the main axis of the lamp rod, and in fact, the balance hinge piece 204 may be not only an inverted flagpole type, but also an inverted F-shaped rod, a straight rod, etc., and the derived shape is not specifically limited in the embodiment of the present invention;

it should be noted that fig. 6 and 7 illustrate the structure of the balance hinge and the base hinge rod, wherein the length of the axis connecting line of the hinge a301 and the hinge B302 on the balance hinge 204 is equal to the length of the axis connecting line of the base end hinge D304 and the hinge C303;

when the axis connecting line of the upper hinge D304 of the lamp holder hinge rod to the axis C303 of the hinge and the axis connecting line of the hinge B302 of the balance hinge piece are in the vertical position of the balance end from the hinge D304, two right-angle sides of a right-angle triangle are formed, the length of the axis connecting line of the hinge B302 of the linkage rod to the hinge C303 is the hypotenuse of the right-angle triangle, a mathematical Pythagorean theorem relation is formed, namely the square of the length of the axis connecting line of the upper hinge B302 of the linkage rod to the hinge C303 of the linkage rod;

referring to fig. 8, the professional desk lamp 001 includes: the lamp holder 400 with the support rod is composed of a support rod 401, a base 402 and a power switch 403;

referring to fig. 9, the professional desk lamp 001 includes: the linkage mechanism seat 306, the linkage mechanism seat cover plate 307, the support rod 401, the base 402, the power switch 403 and the linkage mechanism 300 are connected with the lamp holder 400 with the support rod;

as shown in fig. 3, both ends of a lamp post 103 at the lamp head end are provided with screw connectors, and a through hole and a channel through which a power supply line passes are also formed near the lamp post close to the end, the upper end of the power supply line is connected with the lamp head through an adjustable lamp head, and the lower end of the power supply line bypasses a linkage mechanism seat to be connected with a switch which is arranged on the lamp holder and is connected with the lamp holder with a support rod, so that the power supply supplies power to the lamp head and cuts off the power;

the special desk lamp mainly aims to ensure that the quality of an illuminating lamp holder is not limited by the supporting moment of a desk lamp base, has a moment balance function and can be adjusted at will in height and extending distance;

it should be noted that, in order to achieve the illumination effects of energy saving, environmental protection, high quality, arbitrary height and distance, the light source in the invention is a surface light source electrodeless lamp with high color rendering, blue light inhibition, stroboflash, radiation and glare, and is also suitable for the irradiation source of far infrared therapeutic instruments and spectrum therapeutic instruments;

further, as shown in fig. 1, the desk lamp 001 further includes: a power line 501, a power switch 502, a power plug 503 and the like, and the embodiment of the invention does not specifically limit the accessories of the professional desk lamp;

in conclusion, the application range of the professional desk lamp is expanded through the embodiment;

the professional desk lamp as claimed in claim 1, wherein the "balance end", "lamp head end", "linkage bar", "up and down", "left and right", "horizontal", "vertical", "parallel", "symmetry" and "90 degree" of the desk lamp are all understood as meaning the substitution and absolute or relative relationship of the name, noun and approximate value of implementation, which are allowed for the present invention, and the name combination and description are not the only expression of the functional property of the professional desk lamp for the convenience of description, and in fact, any professional understanding the present invention can derive several expressions from the present invention without any essential thinking, but the right of the principle construction of the present invention shall belong to the present invention.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc

The above description is only a few examples of the present invention, and should not be construed as limiting the scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a professional desk lamp of balanced adjustable altitude distance of linkage, characterized in that, the desk lamp includes: the lamp holder comprises a balancing end consisting of a gravity handle, a balancing rod, a clamping device and a balancing hinge piece, a lamp holder end consisting of a lamp holder, an angle adjuster, a lamp pole and a lamp holder hinge rod, a linkage mechanism consisting of a balancing hinge piece, a linkage rod, a lamp holder hinge rod, a hinge A, a hinge B, a hinge C, a hinge D, a linkage mechanism seat, a linkage mechanism cover and an excircle surface of the linkage mechanism seat, and a lamp holder with a supporting rod.

2. The desk lamp as set forth in claim 1, wherein: the balance end realizes the up-and-down swinging and positioning in the forward and reverse 90-degree range through the linkage mechanism, and drives the linkage rod to drive the lamp head end to synchronously swing up and down and position in each 90-degree range left and right through the linkage mechanism, so that the gravity moment of the lamp head end is equal to or approximately equal to the gravity moment of the balance end, the moment of the balance end, namely the product of the gravity center gravity of the gravity handle and the effective length of the balance rod, is equal to the moment of the lamp head end, namely the product of the gravity center gravity of the lamp head and the angle adjuster and the effective length of the lamp rod, and the aim of.

3. The table lamp linkage mechanism according to claim 1 or 2, wherein: the balance hinge piece is a hinge rod provided with a hinge A and a hinge B respectively, the hinge rod extends into a rectangular piece along the vertical direction of the axis connecting line of the hinge A and the hinge B and is fixed with a round rod in parallel to form an inverted flag-shaped assembly, the distance between the round rod and the axis connecting line of the hinge A and the hinge B provides a spacing distance for the balance handle and the lamp holder end, a hinge A hole in the balance hinge piece is hinged with a hinge A hole of a linkage mechanism seat to form a hinge A, a hinge B hole in the balance hinge piece is hinged with a hinge B hole of the linkage rod to form a hinge B, and when the balance hinge piece rotates on the linkage mechanism seat around the axis of the hinge A, the linkage rod is driven to drive the hinge rod to synchronously swing.

4. The table lamp linkage mechanism according to claim 1 or 2, wherein: the lamp holder hinge rod is an inverted L-shaped hinge rod which is respectively provided with a hinge D and a hinge C, a flat rod perpendicular to the axis connecting line is fixed along the perpendicular direction of the axis connecting line of the hinge D and the hinge C on the same plane to form an inverted L-shaped, L-shaped or inverted T-shaped hinge rod assembly, the other end of the flat rod is connected with a lamp post bolt, a hinge D hole in the lamp holder hinge rod is hinged with a hinge D hole of a linkage mechanism seat to form a hinge D, a hinge C hole in the lamp holder hinge rod is hinged with a hinge C hole of the linkage rod to form a hinge C, the lamp holder hinge rod is synchronously driven by the linkage rod through the hinge C to rotate around the axis of the hinge D on the linkage mechanism seat, so the lamp holder hinge rod is driven by the linkage rod, and the linkage rod is driven by a balance hinge sheet to realize synchronous forward and reverse 90-degree swinging and.

5. The desk lamp linkage mechanism according to claims 1, 2, 3 and 4, wherein the linkage rod is a straight rod with holes B and C at both ends, the hole C of the hinge of the linkage rod is hinged with the hole C of the hinge of the lamp holder hinge rod, the hole B of the hinge of the linkage rod is hinged with the hole B of the hinge of the balance hinge plate, the length of the connecting line between the hinge C of the lamp holder hinge rod and the axis of the hinge D is equal to the length of the connecting line between the hinge A of the balance hinge and the axis of the hinge B, the length of the connecting line between the hinge B of the linkage rod and the axis of the hinge C is longer than the length of the connecting line between the hinge C and the axis of the hinge C and is also longer than the length of the connecting line between the hinge A and the axis of the hinge B, the length relationship is equal to or close to the mathematical right triangle collude theorem, that the square of the distance between the hinge C, or the square of the distance of the axle center of the hinge B and the hinge C is equal to the sum of the square of the distance of the axle center of the hinge A and the hinge C when the balance bar is horizontal.

6. The linkage mechanism of the desk lamp as claimed in claim 1, wherein the linkage mechanism base is a thick circular plate which has a circular cut perpendicular to the horizontal plane and is installed on the lamp holder with the bracket and has an outer circular surface, the circular plate is provided with hinge D holes and hinge a holes arranged up and down, the circular plate takes the hinge a holes as a circle center and takes a linear distance equal to or slightly greater than the axis of the hinge a of the balance hinge plate and the circular arc surface of the clamper as a radius, the outer circular surface of the circular plate is used as a locking action surface of the clamper, the connecting line of the axis of the hinge D hinge a on the linkage mechanism base is perpendicular to the horizontal plane, the horizontal circle of the linkage mechanism base is cut below the circle, and the linkage mechanism base is connected with the lamp holder with the bracket through.

7. The linkage mechanism of the desk lamp as claimed in claim 6, wherein the balance handle of the balance end is fixedly connected with the balance rod and is in loose-tight connection with the balance hinge piece through a bolt, the clamp is slidably sleeved on the balance hinge piece and is positioned outside the outer circle of the linkage mechanism seat, and the clamp and the outer circle surface of the linkage mechanism seat form a clamping surface under the state that the balance handle is loosened or screwed, so that the balance end can be locked and positioned or loosened when swinging up and down by 90 degrees, and the lamp end is linked and positioned.

8. A linkage mechanism of desk lamp as defined in claim 5, wherein the horizontal circular cutting plane of the linkage mechanism seat is a horizontal stop plane for balancing the swing of the hinge piece, said linkage mechanism is fixedly connected to said lamp holder with the supporting rod and placed on the plane, and the center of gravity of the desk lamp is located on said lamp holder with the supporting rod.

9. The table lamp linkage as claimed in claim 1, wherein the linkage cover is a cover plate having the same radius and the same circular shape as the linkage base, and the lower side of the cover plate is connected to the upper surface of the lamp holder with the support rod together with the linkage base.