CN215908909U - Desk lamp - Google Patents

Abstract

The utility model provides a desk lamp, which comprises a lamp holder, a lamp post and a lamp holder, wherein the lamp holder comprises a shell, and a light outlet is formed in the shell; and a light source plate disposed within the housing; a plurality of light emitting sources are distributed on the light source plate, and the light emitting sources face the light outlet to emit light; the lamp post is characterized in that a light blocking part extending from the light outlet to one side of the light source plate is arranged on the shell, the light source plate comprises a first area and a second area, the first area and the lamp post are oppositely arranged, and the distance between the light emitting sources in the first area is larger than the distance between the light emitting sources in the second area. By reducing the light-emitting sources which do not contribute to the illumination value of the illumination area 500mm in the angle area theta far away from the lamp post, the reflection glare generated when the light-emitting sources at the far position illuminate the lamp post is reduced.

Description

Desk lamp

Technical Field

The utility model relates to a lighting lamp, in particular to a desk lamp.

Background

The desk lamp is a household appliance used for illumination in life, and is generally used in areas such as desks and bedside cabinets. The bright irradiation range of the desk lamp is relatively small and concentrated, the illumination effect of the whole room cannot be influenced, the light action is limited around the desk lamp, reading, learning and working are facilitated, and energy is saved. Nowadays, desk lamps are various in types, and along with improvement of living standard of people, the customer has certain demand and requirement to the illuminating effect of lamps and lanterns: generally, when the distance between a lamp holder and a desktop is 400mm, a central illumination area formed by LED lamp beads on the desktop is 120 degrees, and a circular illumination area is formed on the desktop with the diameter of one meter; the illumination is not uniform under the influence of the lamp holder frame, lamplight reflection and the like, the light intensity in the area of 300mm outwards at the center is strong, the light in the area of 500mm is weak, and the illumination requirement of the reading and writing desk lamp cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the problems and provides a desk lamp which can meet the requirements of light shielding property and illumination intensity in GB/T9473 and 2017 'performance requirement of desk lamps for read-write operation'.

In order to realize the functions, the utility model adopts the technical scheme that the desk lamp comprises a lamp holder, a lamp post and a lamp holder, and is characterized in that the lamp holder comprises a shell, and a light outlet is formed in the shell; and a light source plate disposed within the housing; a plurality of light emitting sources are distributed on the light source plate, and the light emitting sources face the light outlet to emit light; the lamp post is characterized in that a light blocking part extending from the light outlet to one side of the light source plate is arranged on the shell, the light source plate comprises a first area and a second area, the first area and the lamp post are oppositely arranged, and the distance between the light emitting sources in the first area is larger than the distance between the light emitting sources in the second area.

Preferably, the light outlet is circular, the light sources on the light source board are arranged in at least two concentric rings, and the first region is an arc with a midpoint located at the farthest position from the lamp post in the ring formed by the light sources arranged on the outermost side.

Preferably, the central angle θ of the arc where the first area is located is 10-120 °.

Preferably, the central angle θ of the arc where the first area is located is 40-65 °.

Preferably, in the circular ring formed by the arrangement of the light-emitting sources on the outermost side, the distance between the light-emitting sources is gradually reduced along the circumference from the midpoint position of the first region.

Preferably, the lamp cap includes a connection part connected to the lamp post.

Preferably, the light source board further includes a third region disposed adjacent to the connection portion, and a pitch of the light emission sources in the third region is smaller than a pitch of the light emission sources in the second region.

Preferably, the third region is a section of circular arc in the circular ring formed by the outermost light sources arranged, and the circular arc where the third region is located is unfolded towards two sides by taking the corresponding position of the connecting part as a middle point.

Preferably, the light outlet is surrounded by a circle of convex edge extending from the light outlet to a side away from the light source board, and the convex edge forms the light blocking part.

Preferably, the light outlet is provided with a light-transmitting mask.

Preferably, the desk lamp meets the requirements of light shielding property and illumination intensity in GB/T9473-2017 performance requirement of desk lamp for read-write operation.

The frame height of the lamp holder structural member of the desk lamp is higher than the height of a light-emitting mask of the lamp holder of the desk lamp, so that an anti-dazzle angle of the desk lamp is increased, and visual glare is reduced. In addition, by reducing the light-emitting sources which do not contribute to the illuminance value of the illumination area at 500mm in the angle area theta far away from the lamp post, the reduced light-emitting sources are distributed at the positions of the light source plates contributing to the illuminance area, on the premise that the central illuminance of the desktop is not changed, the illuminance values at 300mm and 500mm are increased, the illuminance uniformity is improved, and the visual comfort of human eyes is facilitated; meanwhile, reflection glare generated when the light source at the far pole irradiates on the lamp pole is reduced.

Drawings

FIG. 1 is a schematic diagram of a preferred embodiment of the desk lamp of the present invention;

FIG. 2 is a schematic view of an illuminated area of the desk lamp of FIG. 1;

FIG. 3 is a schematic view of the lamp head of the desk lamp of FIG. 1;

FIG. 4 is a front view of a prior art lamphead;

FIG. 5 is a front view of the lamp head of the desk lamp of FIG. 1;

fig. 6 is a light path diagram of the table lamp of fig. 1.

Detailed Description

The table lamp of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

A table lamp according to a preferred embodiment of the present application is shown in fig. 1, and includes a lamp holder 1, a lamp post 2, and a lamp socket 3. The lamp cap structure is shown in fig. 3, and includes a housing 101 and a light source board 102 disposed in the housing 101. The housing 101 is formed with a light outlet 103, and a light-transmitting mask 106 is disposed at the light outlet 103. The light-transmitting face mask 106 may be a diffuser plate, a prism plate, or an optical panel having a surface provided with microlenses, a frosted layer, or a diffuser film. The light source board has a plurality of light emitting sources 1021 arranged thereon to emit light toward the light outlet 103.

In order to meet the requirement of light shielding property of 6.3.3 in GB/T9473-. The light blocking part 104 can be disposed on one side close to the user, such as the illumination area of the desk lamp of the present embodiment shown in fig. 2 in the use state, the user faces the desk lamp, and the light blocking part 104 should be disposed on the opposite side of the lamp post 2. The light head 1 may be provided with a light blocking portion protruding out of the light outlet 103 only on the side facing the user, but for the sake of integrity and from the viewpoint of aesthetic appearance of the light head, the light outlet 103 is surrounded by a ring of convex edge extending from the light outlet 103 to the side away from the light source plate 102, and the convex edge portion is the light blocking portion 104.

As described above, the height of the light blocking part 104 of the base 1 is higher than the height of the light outlet 103 of the base 1, so that the anti-glare angle of the desk lamp is increased, and the visual glare is reduced. However, since the light blocking portion 104 blocks part of the light emitted from the light source 1021, the illuminance and the illuminance uniformity of the desk lamp on the desk surface are reduced. The lamp cap of this embodiment is disc-shaped, the light outlet 103 is circular, and the light sources 1021 are arranged on the light source plate 102. The light sources 1021 are LEDs, and the LEDs used as the light sources 1021 in the prior art are uniformly arranged, as shown in fig. 4, in a plurality of concentric rings. When the LED light sources are uniformly arrayed, the LED light sources are uniformly distributed at equal intervals among circles. After the light emitted from the light source 1021 near the light blocking portion 104 is blocked by the light blocking portion 104, the light cannot irradiate the area outside the desktop facing the user, i.e. the area with a radius of 500mm below the desk lamp as shown in fig. 2, but the area with a radius of 300mm is not affected, so that the uniformity of the whole desktop is reduced. Meanwhile, the light path of the part of the shielded light is as shown in fig. 6, and the part of the shielded light is reflected by the light blocking part 104 and then illuminates the lamp post 2, and then illuminates the human eyes through the reflection of the lamp post 2, so that reflection glare is generated, and the comfortable light sensation of the desk lamp is reduced.

In order to increase the illumination and the illumination uniformity of the desk lamp, the present embodiment proposes to rearrange the light sources 1021 on the light source board 102. Through analysis, the light emitting source 1021 at the position close to the light blocking part 104 in the outermost circle does not contribute to the illuminance value of the 500mm position of the illumination area, part of light rays emitted by the LEDs at the opposite sides of the light pole 2 in the area directly irradiate the light pole, and the light rays are reflected to the light pole through the structural part of the desk lamp, and then the light rays are reflected through the light pole to form reflection glare to stimulate human eyes, so that the discomfort of the human eyes is increased. Therefore, we consider dividing different areas on the light source board to reduce the number of the light emitting sources 1021 in the non-contributing area. As shown in fig. 5, the light source board 102 includes a first region 1022 and a second region 1023, the first region 1022 is far from the lamp post 2 than the second region 1023, i.e., the first region 1022 and the lamp post 2 are oppositely disposed. The pitch of the light emitting sources 1021 in the first region 1022 is greater than the pitch of the light emitting sources 1021 in the second region 1023. As mentioned above, the light sources 1021 in this embodiment are arranged in a plurality of concentric rings, and therefore, the first region 1022 is a section of an arc in the ring formed by the outermost light sources 1021, specifically, a section of an arc in the ring which is the farthest from the lamp post 2 and is the midpoint, and the central angle thereof is θ. Through experiments, theta is more than or equal to 10 degrees and less than or equal to 120 degrees, and preferably more than or equal to 40 degrees and less than or equal to 65 degrees. In the present embodiment, the light sources 1021 in the first region 1022 and the second region 1023 are uniformly arranged, and in other preferred embodiments, in the ring formed by the outermost light sources 1021, the distance between the light sources 1021 becomes smaller from the midpoint of the first region 1022 along the circumference, i.e. the distance from the farthest position of the lamp post 2 is the largest, and the distance between the light sources 1021 is smaller as the distance is closer to the lamp post 2.

Compared with the prior art shown in fig. 4, the number of the light sources 1021 on the light source board 102 is actually reduced, which will decrease the overall illumination of the desk lamp, and in order to ensure the central illumination of the desk top is not changed, the reduced light sources 1021 are moved to the position contributing to the area of 500mm on the desk top on the light source board 102. The additional light sources 1021 and the original light sources 1021 can be uniformly distributed. In this embodiment, in order to simplify the design, the third area 1024 is additionally disposed on the light source board 102, the light-emitting sources 1021 to be added are disposed in the third area 1024, so that the distance between the light-emitting sources 1021 in the third area 1024 is smaller than the distance between the light-emitting sources 1021 in the second area 1023. The third region 1024 is disposed adjacent to the lamp post 2, that is, near the connecting portion 105, in consideration of the uniformity of the whole. In this embodiment, the third section 1024 is an arc of the outermost light emitting sources 1021 in the ring, and the arc of the third section 1024 extends towards two sides with the corresponding position of the connecting portion 105 as a middle point. The light emitting sources 1021 can be uniformly arranged, or the distance between the light emitting sources can be gradually increased by taking the corresponding position of the connecting portion 105 as a midpoint.

In this embodiment, by reducing the light sources 1021 that does not contribute to the illuminance value at 500mm of the illumination area in the angle area θ at the far rod, the light sources 1021 are reduced and arranged at the positions of the light source plates 102 contributing to the illuminance area, and on the premise of ensuring that the illuminance at the center of the desktop is not changed, the illuminance values at 300mm and 500mm are increased, so as to improve the illuminance uniformity, which is beneficial to the comfort of human eyes, and meanwhile, the reflection glare generated when the light sources 1021 at the far rod illuminate the lamp post 3 is also reduced. Tests show that the lamp meets the requirements of light shielding and illumination in GB/T9473-2017 'performance requirement of reading and writing operation desk lamps'.

The foregoing description of the preferred embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the utility model to the precise forms disclosed, and it will be apparent that numerous modifications and variations may be made thereto, which may be apparent to those skilled in the art, and are intended to be included within the scope of the utility model as defined by the appended claims.

Claims (10)

1. A desk lamp comprises a lamp holder, a lamp post and a lamp holder, and is characterized in that the lamp holder comprises a shell, and a light outlet is formed in the shell; and a light source plate disposed within the housing; a plurality of light emitting sources are distributed on the light source plate, and the light emitting sources face the light outlet to emit light; the lamp post is characterized in that a light blocking part extending from the light outlet to one side of the light source plate is arranged on the shell, the light source plate comprises a first area and a second area, the first area and the lamp post are oppositely arranged, and the distance between the light emitting sources in the first area is larger than the distance between the light emitting sources in the second area.

2. The desk lamp of claim 1, wherein: the light outlet is circular, the light sources on the light source board are arranged into at least two concentric rings, and the first area is an arc with a midpoint which is the farthest position from the lamp post in the ring formed by the arrangement of the light sources on the outermost side.

3. The desk lamp of claim 2, wherein: the central angle theta of the arc where the first area is located is 10-120 degrees.

4. The desk lamp of claim 3, wherein: the central angle theta of the arc where the first area is located is 40-65 degrees.

5. The desk lamp of claim 2, wherein: in the ring formed by the arrangement of the luminous sources on the outermost side, the distance between the luminous sources is gradually reduced from the midpoint position of the first area along the circumference.

6. The desk lamp of claim 2, wherein: the lamp holder comprises a connecting part connected with the lamp post.

7. The desk lamp of claim 6, wherein: the light source board further comprises a third area, the third area is arranged adjacent to the connecting portion, and the distance between the light emitting sources in the third area is smaller than that in the second area.

8. The desk lamp of claim 7, wherein: the third area is a section of circular arc in the circular ring formed by the arrangement of the light emitting sources on the outermost side, and the circular arc where the third area is located is unfolded towards two sides by taking the corresponding position of the connecting part as a middle point.

9. The desk lamp of claim 2, wherein: the light outlet is surrounded by a circle of convex edges extending from the light outlet to one side back to the light source plate, and the convex edges form the light blocking part.

10. The desk lamp as claimed in any one of claims 1-9, wherein: the light outlet is provided with a light-transmitting mask.

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