CN215335909U - Study desk lamp capable of switching lighting modes - Google Patents

Abstract

The utility model discloses a study desk lamp capable of switching illumination modes, which comprises a lamp holder, wherein the lamp holder comprises a shell, and a peripheral illumination lamp group and a central illumination lamp group are arranged in the shell; the peripheral lighting lamp group is positioned on the inner periphery of the shell, and the lighting area of the peripheral lighting lamp group comprises an area between a user and the lamp holder but does not comprise an area right below the lamp holder; the central lighting lamp group is positioned in the center of the shell, and the lighting area of the central lighting lamp group comprises an area right below the lamp holder; the peripheral lighting lamp group and the central lighting lamp group can be independently controlled respectively, and when only the peripheral lighting lamp group is started, at least a dark light area is formed in the area right below the lamp holder. The utility model is suitable for reading paper reading materials and electronic reading materials by switching the lighting mode.

Description

Study desk lamp capable of switching lighting modes

Technical Field

The application relates to the technical field of lighting, especially, relate to a study desk lamp of changeable lighting mode.

Background

The current children read-write desk lamp not only provides proper illumination for children to read paper books and writing, but also needs to provide healthy and comfortable illumination for children to read electronic screens such as pads or mobile phones. In the electronic screen reading scene, light needs to be considered to avoid directly irradiating the screen as much as possible, otherwise, the recognition degree of the image on the electronic screen is reduced, and glare is easily generated on the electronic screen, which causes uncomfortable feeling.

When reading paper reading materials, the requirement on the light brightness is high, and at the moment, the desk lamp needs to provide strong illumination to illuminate the whole desktop, so that a comfortable eye-protecting reading environment is provided for a user.

Therefore, it is desirable to provide a learning desk lamp which can be applied to reading paper readings and electronic readings.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to: the study desk lamp with the switchable illumination modes is capable of switching the illumination modes and suitable for reading paper readings and electronic readings.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a study desk lamp capable of switching lighting modes comprises a lamp holder, wherein the lamp holder comprises a shell, and a peripheral lighting lamp group and a central lighting lamp group are arranged in the shell;

the peripheral lighting lamp group is positioned on the inner periphery of the shell, and the lighting area of the peripheral lighting lamp group comprises an area between a user and the lamp holder but does not comprise an area right below the lamp holder;

the central lighting lamp group is positioned in the center of the shell, and the lighting area of the central lighting lamp group comprises an area right below the lamp holder;

the peripheral lighting lamp group and the central lighting lamp group can be independently controlled respectively, and when only the peripheral lighting lamp group is started, at least a dark light area is formed in the area right below the lamp holder.

Preferably, central authorities ' illumination banks includes central authorities ' radiator, lamp plate and central diffusion lens, the lamp plate with central authorities ' radiator butt, central authorities ' diffusion lens orientation one side of central authorities ' radiator is formed with the lamp house, the lamp plate is located in the lamp house.

Preferably, the central diffusion lens is directly connected to the central heat sink.

Preferably, the central diffusion lens is fixed on the central heat sink through a screw connection, or the central diffusion lens is fixed on the central heat sink through a snap connection.

Preferably, the central lighting lamp group further comprises a horn-shaped central reflector, the inner wall of the central reflector is a first reflecting surface, and one side of the central reflector close to the central radiator is connected with the central diffusion lens.

Preferably, the central diffusing lens is of unitary construction with the central reflector.

Preferably, the peripheral lighting lamp group comprises a lamp strip, a peripheral reflector and a peripheral diffusion lens;

the lamp strip is arranged on the inner side of the shell, and the irradiation direction of the lamp strip faces to the middle of the shell;

the peripheral reflector is arranged on the inner side of the lamp strip, and one surface of the peripheral reflector facing the lamp strip is a second reflecting surface;

the peripheral diffusion lens is positioned on one side of the front surfaces, close to the lamp holder, of the lamp strip and the peripheral reflector, and light rays emitted by the lamp strip are reflected by the peripheral reflector and then projected to the peripheral diffusion lens.

Preferably, the casing has an annular installation cavity, the lamp strip is arranged on one side of the middle part of the casing far away from the installation cavity, and the peripheral reflector is arranged on one side of the middle part of the casing near the installation cavity.

Preferably, a background light strip is arranged in a section of one side, far away from the user, of the installation cavity, and the background light strip is used for illuminating a background area far away from the user.

Preferably, the shell comprises an upper shell and a lower shell, and a light through hole corresponding to the central lighting lamp group is formed in the middle of the lower shell; the lower shell is provided with a diffusion lens mounting hole for mounting the peripheral diffusion lens at the periphery of the light through hole, and the peripheral diffusion lens is mounted in the diffusion lens mounting hole.

The beneficial effect of this application does: the utility model provides a learning desk lamp capable of switching lighting modes, which has two lighting modes, specifically an electronic reading mode and a paper reading mode, wherein the electronic reading mode is started when an electronic screen is read, only a peripheral lighting lamp group is started at the moment, the peripheral lighting lamp group lights the region except the region right below a lamp holder, a dark light region is formed below the lamp holder, and the electronic screen is placed in the dark light region, so that glare caused by the fact that light directly irradiates on the screen can be avoided; when the paper reading mode is started during reading paper reading or other works, the central illuminating lamp group is started (the peripheral illuminating lamp groups can be simultaneously started or not), and the whole desktop can be illuminated, so that a bright reading environment is provided for a user. In conclusion, the study desk lamp can switch the lighting modes according to different applicable requirements of the user, and provides a comfortable lighting environment for the user all the time.

Drawings

The present application will be described in further detail below with reference to the accompanying drawings and examples.

FIG. 1 is a schematic view of the structure of the lamp head of the present invention;

fig. 2 is one of the exploded schematic views of the lamp head of the present invention;

FIG. 3 is a schematic cross-sectional view of a central diffusion lens and central reflector of the present invention;

FIG. 4 is a second exploded view of the lamp head of the present invention;

FIG. 5 is a third exploded view of the lamphead of the present invention;

FIG. 6 is an exploded view of the internal structure of the lamp base of the present invention;

fig. 7 is a schematic view of the illumination when the electronic reading mode is turned on.

In the figure:

1. a housing; 11. an upper shell; 111. a first positioning hole; 112. a backlight lens mounting hole; 12. a lower case; 121. a light through hole; 122. a diffusion lens mounting hole; 13. a mounting cavity; 131. a main illumination section; 132. a side illumination section; 133. a background illumination section; 2. a central lighting lamp group; 21. a lamp panel; 22. a central heat sink; 23. A central diffusion lens; 24. a central reflector; 25. a lamp chamber; 26. a convex column; 3. a peripheral illumination lamp group; 31. A light strip; 32. a peripheral reflector; 321. connecting columns; 33. a peripheral diffusing lens; 34. the lamp belt heat dissipation frame; 341. a lamp strip support; 342. a heat dissipation frame support portion; 343. a second positioning hole; 35. a background light band; 36. A background light diffusion lens; 4. a camera is provided.

Detailed Description

In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The embodiment provides a study desk lamp capable of switching lighting modes, which comprises a lamp cap, wherein the lamp cap is provided with a front surface and a back surface, the front surface of the lamp cap is a light emitting surface of the lamp cap, under the general use condition, the desk lamp is used for illuminating a desktop, the lamp cap is positioned above the desktop, and the front surface of the lamp cap needs to face downwards, so that illumination is provided for the desktop;

referring to fig. 1-2, the lamp head comprises a housing 1, and a peripheral lighting lamp group 3 and a central lighting lamp group 2 are installed in the housing 1;

the peripheral lighting lamp group 3 is positioned on the inner periphery of the shell 1, and the lighting area of the peripheral lighting lamp group comprises the area between the user and the lamp holder but does not comprise the area right below the lamp holder; therefore, if the learning desk lamp is placed on the desktop, and the electronic screen is placed under the lamp holder, the light cannot directly irradiate the electronic screen to generate glare at the moment; the desk lamp illuminates the area between the user and the screen, so that the light of the electronic screen can be prevented from directly irradiating human eyes, and a more comfortable reading environment is provided for the user to read the electronic screen;

the central lighting lamp group 2 is positioned in the center in the shell 1, and the lighting area of the central lighting lamp group comprises an area right below a lamp holder; when reading paper reading materials on a desktop or doing other work, the whole desktop needs to be illuminated by bright light, the central illuminating lamp group 2 can be turned on, the central illuminating lamp group 2 can provide more sufficient illumination, and the reading environment requirements of the paper reading materials are met;

the peripheral lighting lamp group 3 and the central lighting lamp group 2 can be independently controlled respectively, and when only the peripheral lighting lamp group 3 is started, at least a dark light zone is formed in the area right below the lamp holder.

Through carrying out independent control to peripheral lighting lamp group 3 and central lighting lamp group 2, can independently adjust according to the reading demand, it is concrete, this scheme can realize the selection of two kinds of illumination modes, specifically for electronic reading mode and paper reading mode. When the electronic screen is read, the electronic reading mode is started, only the peripheral illuminating lamp group 3 is started at the moment, the peripheral illuminating lamp group 3 illuminates the area outside the right lower part of the lamp cap, a dark light area is formed below the lamp cap at the moment, and the electronic screen is placed in the dark light area, so that the phenomenon that light directly irradiates the screen to generate glare can be avoided; when the paper reading mode is started during reading paper reading or other works, the central illuminating lamp group is started (the peripheral illuminating lamp groups can be simultaneously started or not), and the whole desktop can be illuminated, so that a bright reading environment is provided for a user. In conclusion, the study desk lamp can switch the lighting modes according to different applicable requirements of the user, and provides a comfortable lighting environment for the user all the time.

Furthermore, a camera 4 is arranged on one side, facing the desktop, of the lamp holder 1, a controller with an image recognition function is arranged in the learning desk lamp, and the controller is connected with the camera 4, so that the reading of a reading area of the desktop is automatically judged to be an electronic screen or paper data in an image recognition mode, and then the illumination mode can be automatically switched according to a judgment result.

In this embodiment, for the central lighting group structure:

preferably, referring to fig. 2 to 3, the central lighting lamp assembly 2 includes a central heat sink 22, a lamp panel 21 and a central diffusion lens 23, the lamp panel 21 abuts against the central heat sink 22, a lamp chamber 25 is formed on one side of the central diffusion lens 23 facing the central heat sink 22, and the lamp panel 21 is located in the lamp chamber 25. Thereby, central authorities 'radiator 22 can be for lamp plate 21 heat conduction for lamp plate 21's heat dissipation guarantees that lamp plate 21 can work under normal operating temperature. The central diffusion lens 23 can diffuse the light of the lamp panel 21, thereby expanding the illumination range. Referring to fig. 3, a clamping groove capable of just accommodating lamp panel 21 is formed in one side of lamp room 25 close to central heat sink 22, so that lamp panel 21 is supported by central diffusion lens 23, and lamp panel 21 abuts against central heat sink 22.

In particular, the central diffusing lens 23 is directly connected to the central heat sink 22. Therefore, the central diffusion lens 23 is directly supported and fixed by the central heat sink 22, and the central diffusion lens 23 does not need to be supported by other fixed structures, so that the effects of simplifying processing and saving materials are achieved.

Wherein, one side of the central diffusion lens 23 facing the central heat sink 22 is provided with a convex column 26, the central heat sink 22 is provided with a concave position corresponding to the convex column 26, preferably, the central diffusion lens 23 is fixed on the central heat sink 22 by connecting a screw with the convex column 26; or the convex column 26 is clamped with the central heat sink 22 by means of a snap connection, so as to fix the central diffusion lens 23 on the central heat sink 22.

For guaranteeing that the light of lamp plate 21 can both be projected on the desktop, refer to fig. 3, central lighting banks 2 still includes central reflector 24 that is the loudspeaker form, central reflector 24's inner wall is first plane of reflection, central reflector 24 is close to one side of central radiator 22 with central diffusion lens 23 is connected. Therefore, after passing through the central diffusion lens 23, the light is reflected by the central reflector 24 and then projected onto the desktop, so that the waste of light energy is avoided, and the illumination brightness is improved.

The central diffusing lens 23 is of unitary construction with the central reflector 24. Thus, the fixing structure of the central reflector 24 can be omitted, and the assembly process can be simplified.

In this embodiment, referring to fig. 4 to 6, for the peripheral illumination lamp group structure:

the peripheral illumination lamp group 3 includes a lamp strip 31, a peripheral reflector 32, and a peripheral diffusion lens 33;

the lamp strip 31 is arranged on the inner side of the shell 1, and the irradiation direction of the lamp strip 31 faces to the middle part of the shell 1; that is, when the desk lamp is used, the desk lamp is placed on a desktop in front of a user, if the user looks at the lamp holder, when the lamp strip 31 is arranged on one side of the shell 1 close to the user, the lamp strip 31 on the side faces away from the user's sight; when the lamp strips 31 are arranged on the two sides in the shell 1, the lamp strips 31 on the side are parallel to the sight line of a user; when the lamp strip 31 is arranged on the side of the shell 1 far away from the user, the lamp strip 31 on the side is opposite to the sight of the user. In the utility model, the lamp strip of 360 degrees in a whole circle is not required to be arranged in the shell 1, and the lamp strip can be arranged in a whole circle or partially. Of course, to ensure that the area right in front of the user can be illuminated, the side of the housing 1 close to the user must be provided with the lamp strip 31;

the peripheral reflector 32 is disposed inside the light strip 31, and a surface of the peripheral reflector 32 facing the light strip 31 is a second reflecting surface; for the lamp strip 31 close to the user side in the shell 1, the lamp strip emits light back to the user, and the light is reflected by the peripheral reflector 32 and then projected to the area right in front of the user; it is assumed that the other sides of the housing 1 are likewise provided with light strips 31, the reflected illumination areas of which can be understood with reference to the above description. Therefore, after reflection, a dark light area in a certain range can be formed just below the lamp cap;

the peripheral diffusion lens 33 is located on a side of the light strip 31 and the peripheral reflector 32 near the front surface of the lamp head, and light emitted from the light strip 31 is reflected by the peripheral reflector 32 and then projected toward the peripheral diffusion lens 33. After being reflected by the peripheral reflector 32, the light is still concentrated, the illumination range is small, and after being diffused by the peripheral diffusion lens 33, the light can be diffused, thereby enlarging the illumination range.

Therefore, referring to fig. 7, when the desk lamp of the present solution is turned on only the peripheral lighting lamp group 3, a dark light area is formed under the lamp head, and at this time, when the electronic screen can be directly placed under the lamp head, light cannot directly irradiate onto the electronic screen, thereby avoiding discomfort to the reader due to glare generated on the electronic screen. In addition, the lighting area of the scheme is located in front of the lamp cap, the lamp cap can be located in front of a user when placed, a large safety distance is kept between the lamp cap and the head of the user, and the head of the user is prevented from colliding with the desk lamp.

Wherein the second reflecting surface of the peripheral reflector 32 is an arc-shaped surface or an inclined plane. The peripheral reflector 32 is set to be an arc-shaped surface or an inclined plane, and light rays can be reflected towards the direction which is inclined downwards and outwards, so that an illumination area can be formed in an area which is positioned on a table top and is not positioned under the lamp holder.

As a preferred mounting structure of the light strip 31 and the like, referring to fig. 5, the housing 1 has an annular mounting cavity 13, the light strip 31 is disposed on one side of the mounting cavity 13 away from the middle of the housing 1, and the peripheral reflector 32 is disposed on one side of the mounting cavity 13 close to the middle of the housing 1. Use annular installation cavity 13, can enlarge the installation scope in lamp area 31, can use the longer lamp area 31 of size to can provide wider illumination zone and more sufficient illumination brightness.

In this scheme, because the lighting areas of the light strips 2 in the installation cavities at different positions are different, for convenience of description, the installation cavity 13 is divided into sections, specifically, referring to fig. 5, the installation cavity 13 has a main lighting section 131 and a side lighting section 132, the main lighting section 131 is located at a side section of the installation cavity 13 close to a user, the side lighting section 132 is located at two ends of the main lighting section 131, and the light strips 31, the peripheral reflector 32, and the peripheral diffusion lenses 33 are located in the areas of the main lighting section 131 and the side lighting section 132.

That is, the light strip 31 in the main illumination section 131 can provide illumination for the area right in front of the user, and the light strip 31 in the side illumination section 132 can provide illumination for the areas right in front of the user and on the left and right sides, and this arrangement can form an illumination area with a wider range on the desktop, so as to provide a more comfortable reading environment for the user. Preferably, the lamp strip 31 is not arranged in a section of one side far away from a user in the installation cavity 13, so that a dark light area with a sufficient range can be formed on a desktop in the mode so as to be used for placing an electronic screen, and the effects of reducing the power consumption of the desk lamp and saving energy can be achieved.

Since the area directly in front of the user is the main reading area, which needs more sufficient illumination, in this embodiment, the length of the main illumination section 131 is longer than that of the side illumination section 132, and the structure of the annular installation cavity 13 is preferably in a flat shape or a rectangular shape, wherein the main illumination section 131 is the long side thereof.

The electronic screen belongs to a self-luminous body and generally has higher brightness, if the background brightness (such as a wall, a desk and the like) of the electronic screen is insufficient, the brightness difference between the background and the screen is too large, and when the sight line of eyes is switched unconsciously between the background brightness and the screen, the bright environment brightness and the dark environment brightness can promote the lens of the eyes to continuously adjust the size of the pupil, so that the visual fatigue is easily caused.

For this purpose, in the present scheme, the installation cavity 13 further has a background illumination section 133, the background illumination section 133 is located at a side section of the installation cavity 13 away from the user, and two ends of the background illumination section 133 are respectively connected to the side illumination sections 132, so that the main illumination section 131, the background illumination section 133 and the side illumination sections 132 at two sides enclose the installation cavity 13; a background light strip 35 is provided in the background lighting section 133, and the background light strip 35 is used for lighting a background area far away from a user.

Therefore, the background of the electronic screen can be illuminated through the background light strip 35, and a more comfortable reading environment is provided for a user. The background light strip 35 faces away from the user, and light emitted by the background light strip 35 directly illuminates the background area without being reflected.

In order to enlarge the illumination range of the background light, the side of the casing 1, which is located at the side of the background illumination section 133 away from the user, is provided with a background light diffusion lens 36 for diffusing the light emitted from the background light strip 35.

For the structure preferred arrangement mode of the shell of the scheme, a preferred structure is described in detail as follows:

referring to fig. 4-5, the housing 1 includes an upper shell 11 and a lower shell 12, and a light passing hole 121 corresponding to the central lighting lamp group 2 is formed in the middle of the lower shell 12; a diffusion lens mounting hole 122 for mounting the peripheral diffusion lens 33 is formed in the lower case 12 at a peripheral portion of the light passing hole 121, and the peripheral diffusion lens 33 is mounted in the diffusion lens mounting hole 122. A backlight lens mounting hole 112 is provided on the side of the upper case 11 away from the user, and the backlight diffusion lens 36 is mounted in the backlight lens mounting hole 112.

In order to fix the central lighting lamp set 2, the central heat sink 22 is fixed in the upper shell 11 by screws, and the whole central lighting lamp set 2 can be fixed by fixing the central heat sink 22.

In order to fix the peripheral lighting lamp set 3, a plurality of connecting posts 321 are arranged on one side of the peripheral reflector 32 facing the upper shell 11, a plurality of first positioning holes 111 corresponding to the connecting posts 321 are arranged on the upper shell 11, and the peripheral reflector 32 is fixed on the inner side of the upper shell 11 by connecting nails (preferably screws) penetrating through the first positioning holes 111 to be connected with the connecting posts 31.

A lamp strip heat dissipation frame 34 is arranged in the shell 11, and the lamp strip 31 is arranged on the inner side of the lamp strip heat dissipation frame 34. Therefore, the lamp strip heat dissipation frame 34 can not only conduct the heat of the lamp strip 31 to accelerate heat dissipation, but also can be used as a support of the lamp strip 31 to ensure stable structure.

The lamp strip heat dissipation frame 34 has a lamp strip supporting portion 341 and a heat dissipation frame supporting portion 342, the lamp strip 31 is disposed inside the lamp strip supporting portion 341, and the peripheral reflector 32 is located inside the heat dissipation frame supporting portion 342; the heat dissipation frame support portion 342 is provided with a second positioning hole 343 corresponding to the connection post 321, and the connection post 321 passes through the second positioning hole 343, so that the light strip heat dissipation frame 34 is fixed by the peripheral reflector 32. In this structure, the lamp strip heat dissipation frame 34 is supported by the peripheral reflector 32, and the lamp strip heat dissipation frame 34 can be fixed only by fixing the peripheral reflector 32.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.

Claims (10)

1. A learning desk lamp capable of switching lighting modes is characterized in that,

the LED lamp comprises a lamp holder, wherein the lamp holder comprises a shell (1), and a peripheral lighting lamp group (3) and a central lighting lamp group (2) are arranged in the shell (1);

the peripheral lighting lamp group (3) is positioned on the inner periphery of the shell (1), and the lighting area of the peripheral lighting lamp group comprises an area between a user and a lamp holder but does not comprise an area right below the lamp holder;

the central lighting lamp group (2) is positioned in the center in the shell (1), and the lighting area of the central lighting lamp group comprises an area right below the lamp holder;

the peripheral lighting lamp group (3) and the central lighting lamp group (2) can be independently controlled respectively, and when only the peripheral lighting lamp group (3) is started, at least a dark light area is formed in the area right below the lamp holder.

2. The learning desk lamp with switchable lighting modes as claimed in claim 1, wherein the central lighting lamp set (2) comprises a central heat sink (22), a lamp panel (21) and a central diffusion lens (23), the lamp panel (21) abuts against the central heat sink (22), a lamp chamber (25) is formed on one side of the central diffusion lens (23) facing the central heat sink (22), and the lamp panel (21) is located in the lamp chamber (25).

3. A switchable illumination mode learning desk lamp as claimed in claim 2, characterized in that the central diffusing lens (23) is directly connected with the central heat sink (22).

4. The switchable illumination mode learning desk lamp of claim 3,

the central diffusion lens (23) is fixed on the central heat sink (22) by screw connection, or

The central diffusion lens (23) is fixed on the central radiator (22) through a snap connection through a through hole.

5. The switchable illumination mode learning desk lamp as claimed in any one of claims 2-4, wherein the central illumination lamp set (2) further comprises a trumpet-shaped central reflector (24), the inner wall of the central reflector (24) is a first reflection surface, and the side of the central reflector (24) close to the central heat sink (22) is connected with the central diffusion lens (23).

6. A switchable illumination mode learning desk lamp as claimed in claim 5, characterized in that the central diffusing lens (23) is of one-piece construction with the central reflector (24).

7. The switchable illumination mode learning desk lamp of claim 2,

the peripheral lighting lamp group (3) comprises a lamp strip (31), a peripheral reflector (32) and a peripheral diffusion lens (33);

the lamp strip (31) is arranged on the inner side of the shell (1), and the irradiation direction of the lamp strip (31) faces to the middle of the shell (1);

the peripheral reflector (32) is arranged on the inner side of the lamp strip (31), and one surface, facing the lamp strip (31), of the peripheral reflector (32) is a second reflecting surface;

the peripheral diffusion lens (33) is positioned on one side of the light strip (31) and the peripheral reflector (32) close to the front surface of the lamp cap, and light rays emitted by the light strip (31) are reflected by the peripheral reflector (32) and then projected to the peripheral diffusion lens (33).

8. A switchable lighting mode learning desk lamp as claimed in claim 7, characterized in that the housing (1) has a ring-shaped mounting cavity (13), the lamp strip (31) is arranged on one side of the mounting cavity (13) far away from the middle of the housing (1), and the peripheral reflector (32) is arranged on one side of the mounting cavity (13) near the middle of the housing (1).

9. The switchable illumination mode learning desk lamp of claim 8, wherein a background light strip (35) is provided in a side section of the mounting cavity (13) away from the user, and the background light strip (35) is used for illuminating a background area away from the user.

10. The switchable illumination mode learning desk lamp of claim 8, wherein the housing (1) comprises an upper shell (11) and a lower shell (12), and the middle of the lower shell (12) is formed with a light through hole (121) corresponding to the central illumination lamp set (2); the lower shell (12) is provided with a diffusion lens mounting hole (122) for mounting the peripheral diffusion lens (33) at the periphery of the light through hole (121), and the peripheral diffusion lens (33) is mounted in the diffusion lens mounting hole (122).

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