CN113375070A - Professional desk lamp with lever balance and adjustable height distance - Google Patents

Professional desk lamp with lever balance and adjustable height distance Download PDF

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Publication number
CN113375070A
CN113375070A CN202110575332.2A CN202110575332A CN113375070A CN 113375070 A CN113375070 A CN 113375070A CN 202110575332 A CN202110575332 A CN 202110575332A CN 113375070 A CN113375070 A CN 113375070A
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CN
China
Prior art keywords
lamp holder
lamp
balance
hinge
gravity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110575332.2A
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Chinese (zh)
Inventor
张健武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing City Fashion Education Technology Co ltd
Original Assignee
Beijing City Fashion Education Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing City Fashion Education Technology Co ltd filed Critical Beijing City Fashion Education Technology Co ltd
Priority to CN202110575332.2A priority Critical patent/CN113375070A/en
Publication of CN113375070A publication Critical patent/CN113375070A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/0613—Apparatus adapted for a specific treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/26—Pivoted arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/40—Hand grips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N2005/065—Light sources therefor
    • A61N2005/0654—Lamps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N2005/0658—Radiation therapy using light characterised by the wavelength of light used
    • A61N2005/0659—Radiation therapy using light characterised by the wavelength of light used infrared
    • A61N2005/066—Radiation therapy using light characterised by the wavelength of light used infrared far infrared
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention discloses a professional desk lamp with a lever balance and an adjustable height distance, and belongs to the field of lighting lamps. This desk lamp includes: the gravity handle and the balance rod form a balance end, the lamp holder and the angle adjuster, and the lamp holder end, the swinging hinge piece, the threaded pin hinge, the butterfly nut, and the support lamp holder with the hinge hole A and the hinge hole B are formed by the lamp holder and the lamp post; the balance end swings up and down within the range of 90 degrees in the fourth quadrant to drive the swing hinge piece and the lamp holder end to swing synchronously in the second quadrant, the swing hinge piece is connected with a lamp holder with a support rod through a hinge, and a butterfly nut locks the support rod of the lamp holder to position the swing hinge piece; the invention adopts the lever principle and the gravity-moment balance principle to design the balance end to balance the gravity of the lamp holder through the linkage of the swinging hinge plate, thereby overcoming the lodging problem caused by the gravity of the lamp holder, conveniently realizing the adjustment of the height and the distance of the light source and expanding the use and the efficiency of the lamp in special occasions.

Description

Professional desk lamp with lever balance and adjustable height distance
Technical Field
The invention relates to the field of lighting lamps, in particular to a professional desk lamp with a lever balance and an adjustable height 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 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 long-time use, special requirements on background light and high-distance illumination and occasions with heavy light source lamp holders, 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 electrodeless lamps which avoid damages to vision and health caused by blue light, stroboflash, radiation, glare, color cast and the like, are healthier and have high color development compared with natural sunlight, and far infrared treatment light sources and spectrum therapeutic instruments which have larger weight.
Disclosure of Invention
In order to solve the problem that the desk lamp in the prior art cannot meet the wide use of special purpose and special heavy mass light sources due to the limitation of a moment structure, the embodiment of the invention provides a lever-balanced professional desk lamp with adjustable height distance, and the technical scheme is as follows:
the invention provides a professional desk lamp, which comprises: the gravity handle and the balance rod form a balance end, the lamp holder and the angle adjuster and the lamp pole form a lamp holder end, a swinging hinge piece, a pin hinge with threads, a butterfly nut, a support rod lamp holder with hinge holes A and B, a power line, a switch and a plug;
the light source lamp holder, the angle adjuster and the lamp post form a lamp holder end, wherein the lamp post is connected with the upper end of the swinging hinge piece;
the gravity handle and the balance rod form a balance end, wherein the balance rod is connected with the lower end of the swinging hinge piece;
the gravity moment of the lamp holder end, namely the product of the gravity of the center of gravity of the lamp holder end and the effective length of the lamp holder end, and the gravity moment of the balance end, namely the product of the gravity of the center of gravity of the balance end and the effective length of the balance end are equal or approximately equal;
one end of the pin with the thread is fixed in a hinge hole A of the lamp holder supporting rod, the pin slides through a hinge hole of the swinging hinge sheet and a hinge hole B of the lamp holder supporting rod, a screw is connected with a butterfly nut, the butterfly nut is screwed or loosened, the functions of clamping the swinging hinge sheet for positioning and freely moving are realized through one side of the hinge hole B of the lamp holder supporting rod, and the hinge holes A and B of the lamp holder supporting rod have the same axle center and different diameters;
the balance end swings horizontally and vertically by 90 degrees around the hinge axis in a second quadrant on the lamp holder with the hinge holes A and B through the swinging hinge plate, and drives the lamp holder rod and the lamp holder end to swing reversely by 90 degrees in a fourth quadrant through the hinge by the swinging angle and acting force;
when the lamp holder end swings to a horizontal position on the lamp holder supporting rod around the hinge, the lamp holder end and the balance end synchronously stay on a horizontal plane by being clamped by a horizontal tangent plane of the lamp holder supporting rod;
when the balance end swings to a vertical downward position, the balance end is positioned close to the lamp holder supporting rod, and the lamp holder end is reversely positioned at or close to the upward vertical position;
the lamp post and the lamp holder support rod are provided with cavities, power line leading-in and leading-out holes are formed in two ends of each cavity, and power lines can be connected with a lamp source lamp holder and a lamp holder switch of the desk lamp;
the power supply lead in the lamp post cavity is led out from a lower end hole of the lamp post cavity, and the power supply lead bypasses the movable swinging hinge sheet to be directly connected with a hole of a support rod cavity of the lamp holder and is connected with a switch on the lamp holder after entering the support rod cavity; the exposed part of the power line extending out of the lamp post is protected by a sheath;
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 lamp cap 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 lamp holder end and the balancing end of the professional desk lamp realize self gravity moment balance, and swing and positioning in an up-and-down reverse motion manner, so that the lighting height and distance of the lamp holder can be freely changed according to requirements, complex redundant actions are not needed, the problems of time waste, lamp part loss and influence on the service life of the desk lamp are conveniently and quickly solved, the use range of the desk lamp is expanded, various complex special lighting requirements are met, and the service life of the desk lamp is prolonged;
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 electrodeless lamps, far infrared treatment light sources with larger weight, spectrum therapeutic instruments and the like which avoid the damage of blue light, stroboflash, radiation, glare, color cast and the like to vision and health. This specialty desk lamp can extensively satisfy some long-time uses, to the occasion of background light and long distance illumination needs, 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 diagram of an assembly installation structure of the 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 view of the construction of the strut lamp socket provided with hinge holes A and B in the embodiment of FIG. 2;
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 light source lamp holder comprises a light source lamp holder 101, a lamp holder angle adjuster 102, a lamp post 103, a gravity handle 201, a balance rod 202, a swinging hinge piece 301, a hinge pin bolt 302, a butterfly nut 303, a support rod 401 with hinge holes A and hinge holes B, a base 402 and a power switch 403;
referring to fig. 3, the professional desk lamp 001 includes: the lamp holder end 100 consists of a light source lamp holder 101, a lamp holder angle adjuster 102, a lamp post 103 and a swinging hinge piece 301;
referring to fig. 4, the professional desk lamp 001 includes: the balance end 200 is composed of a gravity handle 201 and a balance rod 202;
referring to fig. 2, the connection relationship of the professional desk lamp 001 is as follows: the lamp holder end 100 is connected with the upper end of the swinging hinge piece through the lamp pole 103, the balance end 200 is connected with the lower end of the swinging hinge piece through the balance rod 202, the balance end 200 and the lamp holder end 100 jointly swing around the hinge A and the hinge B through the swinging hinge piece 301, and the butterfly nut 303 is screwed and loosened through the hinge pin nut 302 to realize swinging and positioning of the swinging hinge piece 301;
further, as shown in fig. 2, a lamp holder support rod 401 of the professional desk lamp 001 is provided with two forks of an a hinge and a B hinge hole, a hinge pin bolt 302 is fixed in the a hinge hole of the lamp holder support rod and slides through a swing hinge piece 301 and the B hinge hole of the lamp holder support rod, a bolt of the hinge pin bolt 302 is in bolt connection with a butterfly nut 303, when the butterfly nut 303 is screwed, the B hinge and the swing hinge piece 301 are clamped to realize positioning, otherwise, the bolt is loosened,
referring to fig. 2, the balance end 200 of the professional desk lamp 001 swings up and down by 90 degrees in the second quadrant around the hinge pin nut 302 through the swing hinge piece 301, and the lamp holder end 100 synchronously swings up and down by 90 degrees in the fourth quadrant, so that the height and distance of the lamp holder end are adjusted;
referring to fig. 5, the professional desk lamp 001 includes: the lamp holder 400 with the support rod is composed of a support rod 401 with a hinge A and a hinge B hole, a base 402 and a power switch 403;
as shown in fig. 2, both ends of the 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 arranged 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 the swing hinge piece 301 to be connected with a power switch 403 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 supply, and other power supply modes;
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, a power switch 403, a power plug 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", "swinging hinge piece", "up and down", "horizontal", "vertical" and "90 degree" of the desk lamp can be understood as the terms and absolute or relative relations used for explaining the invention, that is, the substitution of names and nouns and the implementation of approximate values, and the name combination and the description mode are not the only expression of the functional properties of the professional desk lamp for the convenience of description, and in fact, any professional understanding the invention can deduce a plurality of expressions without any essential thinking, but the right of the principle construction of the invention shall belong to the invention;
those skilled in the art will appreciate that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by a program 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, an optical disk, or the like;
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 (6)

1. A professional desk lamp of adjustable height distance is balanced to lever, characterized by, the desk lamp includes: the gravity handle and the balance rod form a balance end, the lamp holder and the angle adjuster and the lamp pole form a lamp holder end, a swinging hinge piece, a pin hinge with screw threads, a butterfly nut and a supporting rod lamp holder with a hinge hole A and a hinge hole B.
2. The professional desk lamp of claim 1, wherein: the balance rod and the lamp holder rod are respectively connected with two ends of the swinging hinge piece to form a non-coaxial or coaxial lever, when the balance end swings up and down within a 90-degree range in the fourth quadrant, the swinging hinge piece drives the lamp holder end to synchronously swing up and down within a 90-degree range in the second quadrant, and the purpose of adjusting the height and the distance of the lamp holder is achieved.
3. The professional desk lamp lever mechanism of claim 1 and 2, which is characterized in that: the gravity moment of the lamp holder end is equal or approximately equal to the gravity moment of the balance end, and 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 holder end, namely the product of the gravity center gravity of the lamp holder and the angle adjuster and the effective length of the lamp holder.
4. The professional desk lamp swinging hinge piece as claimed in claim 1, 2 and 3, wherein: the swing hinge piece is a rigid body provided with a hinge hole at a specific position and is connected with the lamp holder with the support rod through a hinge, the upper end of the swing hinge piece is connected with the lamp pole in an inserting way, and the lower end of the swing hinge piece is connected with the balance rod through a screw.
5. The special desk lamp holder support rod of claims 1, 2, 3 and 4, wherein one end of the pin with thread is fixed in the hinge hole of the holder support rod A, and passes through the hinge hole of the swing hinge piece and the hinge hole of the holder support rod B, so that the screw is connected with the butterfly nut, the butterfly nut is screwed or loosened, the function of clamping the swing hinge piece and positioning is realized through the hinge hole on the other side of the holder support rod, and the hinge holes A and B of the holder support rod have different diameters with the same axle center.
6. The professional desk lamp of claim 1, wherein the balance handle is made of metal, stone and other materials with heavier mass and is in gravity moment balance with the lamp holder end.
CN202110575332.2A 2021-05-26 2021-05-26 Professional desk lamp with lever balance and adjustable height distance Pending CN113375070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110575332.2A CN113375070A (en) 2021-05-26 2021-05-26 Professional desk lamp with lever balance and adjustable height distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110575332.2A CN113375070A (en) 2021-05-26 2021-05-26 Professional desk lamp with lever balance and adjustable height distance

Publications (1)

Publication Number Publication Date
CN113375070A true CN113375070A (en) 2021-09-10

Family

ID=77571901

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110575332.2A Pending CN113375070A (en) 2021-05-26 2021-05-26 Professional desk lamp with lever balance and adjustable height distance

Country Status (1)

Country Link
CN (1) CN113375070A (en)

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