A professional desk lamp with linked balance and adjustable height

Abstract

The present invention discloses a professional desk lamp with a linkage balance and adjustable height distance, belonging to the field of lighting fixtures. The desk lamp comprises: a gravity handle, a balance rod, a clamp, and a balance hinge forming a balance end; a lamp head and an angle adjuster, a lamp pole, and a lamp head hinge forming a lamp head end; a linkage mechanism consisting of the balance hinge, a linkage rod, the lamp head hinge, hinges A, B, C, D, a linkage mechanism seat, a seat outer surface, and a linkage mechanism cover; and a lamp holder with a support rod. The balance end achieves 90-degree up and down swinging and positioning through the linkage mechanism, and drives the linkage rod to drive the lamp head hinge and the lamp head end to swing and position synchronously in the opposite direction. The linkage mechanism is connected to the lamp holder with a support rod. Because the present invention utilizes the balance end to balance the weight of the lamp head through the linkage mechanism using the principle of gravity moment balance, the problem of falling over due to the weight of the lamp head is overcome, and the height and distance of the light source can be easily adjusted, expanding the use and efficiency of the lamp in special professional occasions.

Description

Technical Field

[0001] The present invention relates to the field of lighting fixtures, and in particular to a professional table lamp with a linked balanced height adjustment capability. Background Art

[0002] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0003] Many desk lamps in the prior art are suitable for incandescent lamps, energy-saving lamps, and LED light sources, but are not suitable for special occasions such as electrodeless lamp light sources, infrared light sources, and spectrum light sources, which require heavy lamp heads.

[0004] In the prior art, desk lamps using incandescent light sources have been reduced in use because incandescent lamps are not energy-efficient;

[0005] In the existing technology, energy-saving lamps are used less and less because they also have flickering and radiation.

[0006] In the existing technology, desk lamps with LED light sources have problems such as blue light, flickering, radiation, glare, color cast, etc. that damage vision and health. The low color rendering also affects the lighting quality. The World Health Organization (WHO) Eye Care Association announced that from 2006 to 2008, more than 30,000 people worldwide became blind each year due to blue light radiation. According to data from the Ophthalmology Branch of the Chinese Medical Association: Among the 420 million Internet users in China, 63.5% of Internet users have varying degrees of eye diseases such as decreased vision, cataracts, and blindness due to blue light and radiation. Existing studies have shown that long-term exposure to high-intensity blue light throughout the day will aggravate retinal macular diseases, lead to fundus damage after cataract surgery, cause blurred vision and glare, and inhibit the secretion of melatonin, disturb sleep, and increase the incidence of major diseases in the human body.

[0007] Commonly used white LED lighting sources, which produce white light by stimulating yellow phosphor with a blue LED, have an uneven spectral curve. In particular, the peak of the blue light band is significantly higher than that of natural light or incandescent lamps. The resulting white light spectrum has a higher proportion of blue light, and excessive blue light is harmful to the human eye. In recent years, LED lighting sources have widely replaced conventional lighting sources as the light source for desk lamps.

[0008] Most desk lamps in the prior art are single cantilever beam structures, which are simple structures that balance the gravity torque of the lamp cap with the torque of the lamp base. They are only suitable for light-weight point light sources, such as incandescent lamps and LED light sources, and for applications where the span height requirement is not high. However, if heavy-weight light sources, such as electrodeless lamps, far-infrared light sources, spectrum light sources, or special applications where the lighting height and distance need to be adjusted at any time, the prior art has significant drawbacks.

[0009] The existing inventions include a table lamp based on a balance rod principle, a table lamp with a pulley device, and a table lamp with a weight. However, these lamps are complex to adjust and cannot meet the requirements of fast, simple, low-cost, and complex professional environments.

[0010] The present invention provides a new application technology solution that can widely meet the needs of some occasions where long-term use requires background light and long-distance lighting, such as: professional background light for offsetting blue light from computer screens, restoration of cultural relics with high color rendering requirements, photography lighting, color discrimination of food, cloth, paper, printing, equipment maintenance and some high-demand and complex environments in medical care;

[0011] The present invention is a professional desk lamp with stable placement and convenient and quick adjustment of lighting height and distance. It is particularly suitable for eliminating blue light, stroboscopic light, radiation, glare, color cast and other problems that are harmful to vision and health, and is healthier than natural sunlight, high-color rendering electrodeless lamps, and some relatively heavy far-infrared therapeutic light sources and spectrum therapy devices. Summary of the Invention

[0012] In order to solve the problem that the existing desk lamps cannot meet the wide application of special purpose and special heavy-weight light sources due to the limitations of the torque structure, the present invention provides a professional desk lamp with a linked balance and adjustable height distance. The technical solution is as follows:

[0013] The present invention provides a professional desk lamp, comprising: a balancing end consisting of a gravity handle, a balancing rod, a clamp, and a balancing hinge; a lamp 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, a linkage rod, the lamp holder hinge rod, hinge A, hinge B, hinge C, hinge D, a linkage mechanism seat, and an outer circular surface of the linkage mechanism seat; a lamp holder with a support rod, a power cord, a switch, and a plug;

[0014] The light source lamp holder, lamp holder angle adjuster, lamp pole, and lamp holder hinge rod are connected to form a lamp holder end, wherein the lamp pole axis is vertically fixedly connected to the axis line connecting the hinge D and hinge C of the lamp holder hinge rod;

[0015] The gravity handle, balance rod, balance hinge, tension bolt and clamp constitute the balance end, wherein the axis of the balance rod is parallel to the axis connecting the hinge A and hinge B of the balance hinge and has a certain distance therebetween;

[0016] The balancing end is tightened by tightening the balancing handle so that the clamp set on the balancing hinge is positioned on the outer surface of the linkage mechanism seat, and the position of the lamp holder end and the balancing end can be locked and loosened at the same time, and vice versa;

[0017] The lamp holder hinge rod, hinge D, hinge C, balance hinge piece, hinge B, hinge A, clamp, linkage rod, linkage mechanism seat, linkage mechanism seat outer circular surface and linkage mechanism seat cover plate constitute a linkage mechanism;

[0018] The linkage mechanism forms the linkage and braking of the lamp head end and the balance end in the horizontal and vertical directions, which are 90 degrees symmetrical up and down. When the balance end swings up and down, the linkage rod is driven to synchronously drive the lamp head end to swing up and down symmetrically at 90 degrees.

[0019] The balancing end swings 90 degrees horizontally and vertically around the axis of hinge A on the linkage mechanism seat through the balancing hinge, and the swing angle and force drive the linkage rod through hinge B. The linkage rod then synchronously transmits the force through hinge C to drive the lamp holder hinge rod to swing 90 degrees around the axis of hinge D on the linkage mechanism seat;

[0020] When the balancing end swings around the hinge A axis on the linkage mechanism seat to a horizontal position, it is stopped by the horizontal section of the linkage mechanism seat, and the lamp head end stays on the horizontal plane in a linkage manner;

[0021] The vertical height of the horizontal section of the linkage mechanism seat relative to the hinge hole A determines whether the balance end and the lamp holder end are in or close to a horizontal position;

[0022] The lamp head end receives the force and movement angle transmitted by the linkage rod through the lamp head hinge rod, and swings up and down 90 degrees and stops in position in conjunction with the balance end;

[0023] The circular plane of the linkage mechanism seat is erected at the circular tangent, and has a hinge hole D and a hinge hole A from top to bottom. The axis line of the two holes is perpendicular or approximately perpendicular to the horizontal plane of the circular tangent of the linkage mechanism seat and the horizontal plane of the lamp holder. The distance between the axis of hinge A and the horizontal plane of the circular tangent is equal to or greater than the outer dimension from the axis of hinge A to the bottom end of the balancing hinge, leaving space for the balancing end to swing 90 degrees.

[0024] When the axis of the balancing rod moves to a position perpendicular to the horizontal plane of the circle, the distance between the axis of hinge A and the axis of hinge D on the linkage mechanism seat is equal to or slightly greater than the distance between the axis of hinge A and the outer diameter of hinge B plus the outer diameter of hinge D of the lamp holder hinge rod, so that there is no obstruction when the balancing hinge piece moves to the vertical position;

[0025] The length of the axis connecting the hinge D and hinge C on the lamp holder hinge rod is equal to the length of the axis connecting the hinge A and hinge B on the balancing hinge. The axis connecting the hinge D and hinge C on the lamp holder hinge rod is set as a right angle side. When the hinge D is in the vertical position at the balancing end, the axis connecting the hinge B on the balancing hinge forms another right angle side, forming two right angle sides of a right triangle. The axis length of the hinge B to hinge C of the linkage rod is the hypotenuse of this right triangle, forming a mathematical Pythagorean theorem relationship, that is, the square of the length of the axis connecting the hinge B to hinge C on the linkage rod is equal to the sum of the squares of the two right angle sides.

[0026] The 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 balancing hinge to the bottom end surface of the balancing hinge and the set clamp, so that the balancing end handle can be screwed to lock or unlock the clamp to achieve locking or unlocking of the balancing end and the lamp holder end during the 90-degree swing process.

[0027] The outer circumferential surface of the linkage mechanism seat is parallel to the centerline of the circular axis, and the outer circumferential surface may be knurled and act as a clamp to lock the adjustment position of the balance end and the lamp holder end;

[0028] The linkage mechanism seat has a linkage mechanism seat cover plate with the same circular diameter, circular section and outer circular surface. The outer circular surface of the cover plate can serve as a locking auxiliary surface for the clamp at the balance end when in a locked state. The linkage mechanism seat cover plate is connected to the linkage mechanism seat on the circular section and is connected to the linkage mechanism seat above the circular section to provide support strength.

[0029] The lower end of the linkage mechanism seat has a circular cut, which is placed horizontally and connected to the upper plane of the lamp holder with a support rod;

[0030] The support pole of the lamp holder with support pole has a cavity, and power cord inlet and outlet holes are provided at both ends of the cavity; the power cord can be connected to the table lamp switch;

[0031] The lamp pole has a cavity, and power cord inlet and outlet holes are provided at both ends of the cavity; the power cord is connected to the lamp holder through the hollow channel of the lamp pole and the hollow channel of the lamp holder angle adjuster in sequence, and the power cord extends out of the other end of the lamp pole. There is a sheath that bypasses the linkage mechanism and is directly connected to the power cord hole of the lamp holder support rod;

[0032] Optionally, the desk lamp further comprises: a power cord, a plug, and a power switch;

[0033] Optionally, the lamp head can be installed with a surface light source such as an electrodeless lamp, a far-infrared therapeutic device, a spectrum therapeutic device, or other heavy-duty light sources;

[0034] Optionally, the gravity handle is made of metal or sandstone;

[0035] The technical solution provided by the present invention has the following beneficial effects: the lamp head end and the balance end of the professional desk lamp provided by the present invention can achieve weight balance, can be linked to freely swing within a 90-degree range and be locked in position, and the lamp head can adapt to heavier light sources and irradiation sources, such as electrodeless lamps, far-infrared therapeutic device light sources, spectrum therapeutic device irradiation sources, etc.

[0036] Because the linkage mechanism of the present invention forms the linkage and positioning of the up and down movement of the lamp head end and the balance end of this professional desk lamp, when the balance end moves up and down, it drives the linkage rod, which drives the lamp head end to move up and down symmetrically and in linkage, thereby achieving the effect of changing the lighting height and distance of the lamp head. The adjusted height and distance can be fixed by tightening the balance handle. Without the need for complex and redundant movements, it conveniently and quickly solves the problems of wasted time, lamp parts wear, and shortened service life of the desk lamp, thereby expanding the scope of use of the desk lamp, meeting a variety of complex and special lighting requirements, and extending the service life of the desk lamp.

[0037] This professional desk lamp offers stable placement and convenient and quick adjustment of illumination height and distance. It is particularly suitable for applications such as electrodeless lamps that eliminate blue light, flickering, radiation, glare, and color shift, which can harm vision and health, as well as for heavier far-infrared therapeutic light sources and spectrum therapy devices. This professional desk lamp can be used in a wide range of applications requiring long-term use and a critical need for background light and long-range illumination, such as placing it above and behind computer operators to alleviate eye fatigue, identifying and restoring cultural relics, photographic lighting, color discrimination of jade, food, cloth, paper, and printing, equipment maintenance, and other demanding environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0039] Figure 1 This is a structural diagram of a professional desk lamp 001 provided by one embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the component structure of a professional desk lamp 001 provided by one embodiment of the present invention;

[0041] Figure 3 yes Figure 2 A schematic diagram of the component structure of the lamp cap end 100 provided in the illustrated embodiment;

[0042] Figure 4 yes Figure 2 A schematic diagram of the component structure of the balancing end 200 provided in the illustrated embodiment;

[0043] Figure 5 yes Figure 2 A schematic structural diagram of an adjusting component of a linkage mechanism 300 provided in the illustrated embodiment;

[0044] Figure 6 yes Figure 2A schematic structural diagram of a lamp holder hinge assembly provided by the illustrated embodiment;

[0045] Figure 7 yes Figure 2 The illustrated embodiment provides a structural schematic diagram of a balancing hinge component;

[0046] Figure 8 yes Figure 2 The illustrated embodiment provides a schematic structural diagram of a lamp holder 400 with a support pole;

[0047] Figure 9 yes Figure 2 Schematic diagram of the installation structure of the linkage mechanism 300, linkage mechanism base cover 307 and lamp holder with support pole 400 provided in the illustrated embodiment;

[0048] Figure 10 This is a diagram showing the weight-torque balance principle for adjusting the lighting height and distance of a professional desk lamp provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings;

[0050] refer to Figure 2 , which shows a schematic diagram of the component structure of a professional desk lamp 001 provided by one embodiment of the present invention, the professional desk lamp includes: a light source lamp head 101 and a lamp head angle adjuster 102, a lamp pole 103, a lamp head hinge rod 104, hinge A301, hinge B302, a gravity handle 201, a balance bar 202, a clamp 203, a balance hinge piece 204, hinge C303, hinge D304, a linkage rod 305, a linkage mechanism seat 306, a linkage mechanism seat cover 307, an outer circular surface of the linkage mechanism seat 308, a support rod 401, a base 402, a power switch 403, and a lamp holder with a support rod 400;

[0051] See also Figure 3 The professional desk lamp 001 includes: a lamp head end 100 composed of a light source lamp head 101, a lamp head angle adjuster 102, a lamp rod 103, and a lamp head hinge rod 104;

[0052] See also Figure 4 The professional desk lamp 001 includes: a balancing end 200 composed of a gravity handle 201, a balancing rod 202, a clamp 203, and a balancing hinge 204;

[0053] See also Figure 5The professional desk lamp 001 includes: a linkage mechanism 300 consisting of a lamp base hinge rod 104, a hinge A 301, a hinge B 302, a balancing hinge piece 204, a clamp 203, a hinge 303, a hinge D 304, a linkage rod 305, a linkage mechanism seat 306, a linkage mechanism seat cover 307, and a linkage mechanism seat outer circular surface 308;

[0054] See also Figure 2 and Figure 5 The connection relationship of the professional desk lamp 001 is as follows: the lamp head end 100 is connected to the hinge D on the linkage mechanism 300 through the lamp head hinge rod 104 and swings around the hinge D; the balancing end 200 is connected to the hinge A on the linkage mechanism 300 through the balancing hinge piece 204 and swings around the hinge A; the hinge C303 on the linkage rod 305 is connected to the hinge C of the lamp head hinge rod 104, and the hinge B302 on the linkage rod 305 is connected to the hinge B of the balancing hinge piece 204;

[0055] Furthermore, if Figure 2 and Figure 5 As shown, after the balancing end 200 of the professional desk lamp 001 releases the clamp 203 mounted on the balancing hinge, the balancing end 200 swings 90 degrees up and down around the hinge A on the linkage mechanism seat 306 through the hinge A of the balancing hinge 204. The linkage rod 305 is driven by the hinge B of the balancing hinge 204 and the linkage rod 305. Then, the linkage rod 305 and the hinge C of the lamp holder hinge rod 104 drive the lamp holder hinge rod 104 to swing synchronously 90 degrees around the hinge D of the linkage mechanism seat, thereby achieving synchronous linkage between the balancing hinge 204 and the lamp holder hinge rod 104 on the plane of the linkage mechanism seat 306, realizing symmetrical 90-degree linkage between the balancing end and the lamp holder end in the forward and reverse directions, thereby achieving adjustment of the height and distance of the lamp holder end.

[0056] It should be noted that Figure 6 The lamp holder hinge rod structure is used as an example for explanation, wherein the axis connecting the hinge D and the hinge C is perpendicular or nearly perpendicular to the lamp holder rod axis. In fact, the lamp holder rod axis can be fixedly connected at any position of the axis connecting the hinge D and the hinge C, forming an inverted L-shaped rod, an L-shaped rod, an inverted T-shaped rod, etc. Other structures, such as a regular F-shaped rod and a T-shaped rod, etc., are not specifically limited to the derived shapes in the embodiments of the present invention.

[0057] It should be noted that Figure 7 The structure of the balancing hinge is used as an example for explanation. The reason why the axis connecting the hinges A and B is parallel to the axis of the balancing pole and spaced apart is to make the axis of the balancing pole avoid the main axis of the lamp holder. In fact, the balancing hinge 204 can be not only an inverted flagpole shape, but also an inverted F-shaped pole, a straight pole, etc. The embodiment of the present invention does not specifically limit the derived shape.

[0058] It should be noted that Figure 6and Figure 7 The structure of the balancing hinge and the lamp holder hinge rod is used as an example for explanation, wherein the length of the axis connecting the hinge A301 and the hinge B302 on the balancing hinge 204 is equal to the length of the axis connecting the hinge D304 and the hinge C303 on the lamp holder end;

[0059] The line connecting the axis of hinge D304 on the lamp holder hinge rod to hinge C303 and the line connecting the axis of hinge B302 on the balancing hinge piece when hinge D304 is in the vertical position at the balancing end form two right-angled sides of a right triangle. The length of the axis of hinge B302 on the linkage rod to hinge C303 is the hypotenuse of this right triangle, forming a mathematical Pythagorean theorem relationship, that is, the square of the length of the line connecting the axis of hinge B302 on the linkage rod to hinge C303 is equal to the sum of the squares of the two right-angled sides;

[0060] See also Figure 8 The professional desk lamp 001 includes: a lamp holder 400 with a support rod composed of a support rod 401, a base 402, and a power switch 403;

[0061] See also Figure 9 The professional desk lamp 001 includes: a linkage mechanism seat 306, a linkage mechanism seat cover 307, a support rod 401, a base 402, a power switch 403, and a linkage mechanism 300 connected to a lamp holder with a support rod 400;

[0062] like Figure 3 As shown, in addition to the screw interfaces at both ends of the lamp pole 103 at the lamp head end, through holes and channels for the power line to pass through are also provided near the end of the lamp pole. The upper end of the power line is connected to the lamp head through the adjustable lamp head, and the lower end of the power line bypasses the linkage mechanism seat and is connected to the lamp holder with the support pole and is connected to the switch provided on the lamp holder, so that the power supply can power on and off the lamp head, as well as other power supply methods;

[0063] The main purpose of the invention of this professional desk lamp is to ensure that the quality of the lamp head is not limited by the support torque of the desk lamp base. It has its own torque balancing function and can arbitrarily adjust the height and the extension distance of the lamp head.

[0064] It should be noted that in order to achieve energy-saving, environmentally friendly, high-quality, and lighting effects at any height and distance, the light source in the present invention is a surface light source electrodeless lamp with high color rendering, suppression of blue light, strobe, radiation, and glare, and is also suitable for the irradiation source of far-infrared therapy devices and spectrum therapy devices;

[0065] Furthermore, if Figure 1 As shown, the desk lamp 001 further includes: a power cord 501, a power switch 502, a power plug 503, etc. The embodiment of the present invention does not specifically limit the accessories of the professional desk lamp;

[0066] In summary, the present invention expands the scope of use of professional desk lamps through the above embodiments;

[0067] To sum up, the "balance end", "lamp head end", "linkage mechanism", "linkage rod", "up and down", "left and right", "horizontal", "vertical", "parallel", "symmetrical" and "90 degrees" of the professional desk lamp can be understood as the alias and absolute or relative relationships used to explain the present invention, that is, the replacement of names and nouns and the approximate values of implementation are allowed. It is only for the convenience of description. The name combination and description method are not the only expression of the functional properties of this professional desk lamp. In fact, any professional who understands the present invention can deduce several forms of expression from the present invention without thinking about the essence, but the right to the principle structure of the present invention should belong to the present invention.

[0068] Those skilled in the art will appreciate that all or part of the steps of the above embodiments may be accomplished by hardware or by a program instructing the relevant hardware to accomplish the steps. The program may be stored in a computer-readable storage medium, which may be a read-only memory, a magnetic disk, or an optical disk.

[0069] The above descriptions are only a few embodiments of the present invention, and should not be construed as limiting the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A professional desk lamp with a linked balance and adjustable height distance, characterized by: The desk lamp comprises: a balancing end consisting of a gravity handle, a balancing rod, a clamp, and a balancing hinge; a lamp head end consisting of a lamp head and an angle adjuster, a lamp pole, and a lamp head hinge rod; a linkage mechanism consisting of a balancing hinge, a linkage rod, a lamp head hinge rod, hinge A, hinge B, hinge C, hinge D, a linkage mechanism seat, a linkage mechanism cover, and an outer circular surface of the linkage mechanism seat; and a lamp holder with a support rod; The balancing end is able to swing up and down and position in the forward and reverse 90-degree range through the linkage mechanism, and the linkage mechanism drives the linkage rod to drive the lamp head end to swing up and down and position in the left and right 90-degree range synchronously, so that the gravity torque of the lamp head end is equal to or approximately equal to the gravity torque of the balancing end. The torque of the balancing end, that is, the product of the gravity of the center of gravity of the gravity handle and the effective length of the balance rod, is equal to the torque of the lamp head end, that is, the product of the gravity of the center of gravity of the lamp head and the angle adjuster and the effective length of the lamp pole, so as to achieve the purpose of adjusting the height and distance of the lamp head; The balancing hinge is a hinge rod with hinge A and hinge B respectively. It extends vertically along the line connecting the axes of hinge A and hinge B to form a rectangular piece and is fixed with a round rod in parallel, forming an inverted flag-shaped component. The distance between the round rod and the line connecting the axes of hinge A and hinge B provides the spacing between the balancing handle and the lamp holder end. The hinge A hole on the balancing hinge is hinged to the hinge A hole of the linkage mechanism base to form hinge A. The hinge B hole on the balancing hinge is hinged to the hinge B hole of the linkage rod to form hinge B. When the balancing hinge rotates around the axis of hinge A on the linkage mechanism base, it drives the linkage rod to drive the lamp holder hinge rod to swing synchronously. The lamp holder hinge rod is an inverted L-shaped hinge rod respectively provided with a hinge D and a hinge C. On the same plane, a flat rod perpendicular to the axis connecting the hinge D and the hinge C is fixed in the vertical direction to form an inverted L-shaped, L-shaped or inverted T-shaped hinge rod assembly. The other end of the flat rod is connected to the lamp pole bolt. The hinge D hole on the lamp holder hinge rod is hinged to the hinge D hole of the linkage mechanism seat to form hinge D. The hinge C hole on the lamp holder hinge rod is hinged to the hinge C hole of the linkage rod to form 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. Therefore, the lamp holder hinge rod is driven by the linkage rod, and the linkage rod is driven by the balancing hinge piece to achieve synchronous 90-degree swing and positioning in both forward and reverse directions. The linkage rod is a straight rod with hinge B holes and hinge C holes at both ends. The hinge C hole of the linkage rod is hinged to the hinge C hole of the lamp holder hinge rod, and the hinge B hole of the linkage rod is hinged to the hinge B hole of the balance hinge. The length of the axis connection line between the hinge C and the hinge D on the lamp holder hinge rod is equal to the length of the axis connection line between the hinge A and the hinge B on the balance hinge. The length of the axis connection line between the hinge B and the hinge C on the linkage rod is greater than the length of the axis connection line between the hinge C, and also greater than the length of the axis connection line between the hinge A and the hinge B. The length relationship is equal to or close to the Pythagorean theorem of a mathematical right triangle, that is, the square of the distance between the axes of hinge B and hinge C is equal to the square of the distance between the axes of hinge C and hinge D plus the square of the distance between the axes of hinge D and hinge B when the balance pole is erected, or the square of the distance between the axes of hinge B and hinge C is equal to the square of the distance between the axes of hinge A and hinge B plus the square of the distance between the axes of hinge A and hinge C when the balance pole is horizontal. The linkage mechanism cover is a cover plate with the same radius, the same circle cut and the same material as the linkage mechanism seat, and its lower side and the linkage mechanism seat are connected with the upper surface of the lamp holder with a support rod.

2. The professional desk lamp with a linked balance and adjustable height distance according to claim 1 is characterized in that: The linkage mechanism seat is a thick circular plate with an outer circular surface perpendicular to the horizontal plane and a circular cut that can be installed on the lamp holder with a bracket. Hinge D holes and hinge A holes are arranged above and below the circular plate. The circular plate takes the hinge A hole as the center of the circle and the straight-line distance from the axis of the hinge A of the balancing hinge to the arc surface of the clamp as the radius. The outer circular surface of the circular plate serves as the locking surface of the clamp. The line connecting the axis of hinge D and hinge A on the linkage mechanism seat is perpendicular to the horizontal plane. The horizontal circular cut of the linkage mechanism seat is below the circle. The linkage mechanism seat is connected to the lamp holder with a bracket through the bottom plane of the circular cut.

3. The professional desk lamp with coordinated balance and adjustable height according to claim 2, characterized in that: The balancing handle at the balancing end is fixedly connected to the balancing rod and is loosely and tightly connected to the balancing hinge with bolts. The clamp is slidably mounted on the balancing hinge and is outside the outer circle of the linkage mechanism seat. When the balancing handle is loosened or tightened, the clamp and the outer circle of the linkage mechanism seat form a clamping surface, so that the balancing end can be locked or loosened when swinging up and down 90 degrees, and the positioning of the lamp holder end is linked.

4. The professional desk lamp with coordinated balance and adjustable height according to claim 3, characterized in that: The horizontal circular cut plane of the linkage mechanism seat is the horizontal stop plane for balancing the swing of the hinge. The linkage mechanism is fixedly connected to the lamp holder with a support rod and placed on the plane. The center of gravity of the desk lamp falls on the lamp holder with a support rod.

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