PL67760Y1 - Light diffuser - Google Patents

Description

Pattern description

The subject of the utility model is a light diffuser, intended especially for artificial light sources for plant lighting.

Most plants require long periods of exposure to large amounts of light for optimal growth, which is difficult or impossible to achieve in a temperate climate zone, especially in winter. Therefore, especially in the cultivation of seedlings, artificial light sources emitting waves of an appropriate length are used. Such light sources include, for example, fluorescent lamps, mercury or mercury-incandescent lamps, and low-pressure and high-pressure sodium lamps. The characteristics of lamps used to illuminate plants are defined by the amount of energy per unit of cultivation area. The higher the lamp power, the higher the emitted light intensity, which means that more energy is converted into light. It has been proven that increasing the amount of light intensity has a positive effect on the content of chlorophyll in leaves, increasing the photosynthesis rate and increasing plant mass, which in turn leads to an increase in their growth rate. The amount of light reaching the plants from the light source is inversely proportional to the square of the distance between them. However, as the distance between the light source and the plant is reduced, the amount of heat received by the plants produced by the light source increases. For this reason, in order to maintain an optimally high light intensity and low heat energy emission, light diffusers are used, which at the same time reflect the light emitted towards the plants and constitute a barrier that reduces the amount of thermal energy reaching the cultivated plants. Moreover, the shape of the light diffuser mounted in the luminaire has an influence on the amount of light intensity in the radiation beam that reaches the surface.

Light diffusers, also called protective shields, are known, which are in the form of a perforated element and are intended to be installed in a lighting fixture between the light source and the plant. US 7156539 describes a lighting fixture, in particular for plant breeding, with a light diffuser comprising a perforated element for reflecting light rays with a V-shaped cross-section. The perforated element has an annular fastening element connected to it by means of a narrow elongated element arranged in position. parallel to the plane of the perforated element. The ring is mounted with a screw on the outside to the light source socket, the cover is parallel below the lamp, so that the plate, with its convex side towards the light source, reflects part of the radiation reaching the plants. Such a structure of the device enables its use only in lamps which have a light source socket adapted to be connected to the diffuser ring.

Moreover, from European patent specification EP1145622 a light diffuser is known, intended to be placed parallel below the light source, consisting of a perforated plate which, perpendicularly along one of its edges, has a longitudinally protruding element, arranged parallel to the surface of the perforated plate, to which from the other end the a Ω-shaped fastener is mounted with two screws; this element allows the diffuser to be attached to the light source socket.

Such a structure allows for a slight adjustment of the diameter of the fastening element, and it is necessary to twist the diffuser elements during assembly of the device.

The previously known designs of diffusers do not allow for their quick assembly and disassembly in the lighting fixture. Moreover, the design of the fastener allows the diffuser to be used only in lighting fixtures with a light source socket having an outer diameter approximately equal to the inner diameter of the fastener opening.

It would be advisable to develop a diffuser with a structure that allows its easy assembly and disassembly in lighting fixtures of various types.

The object of a utility model is a light diffuser for light sources with an elongated body, comprising a convex perforated disc, characterized in that on the convex side of the disc there is at least one fastening holder in the form of a hook with an elastic eye.

Preferably, the eye of the hook has the shape of a circular sector in cross section.

Preferably, the eye of the hook has a spiral shape in cross section.

Preferably, the disc is V-shaped in cross section.

Claims (7)

Preferably, the disc has the shape of an ellipse portion of a curvature in cross section. Preferably, the disc has chamfered corners. Preferably, there are two mounting lugs on the convex side of the disc. The object of the utility model is shown in the drawing, in which Figs. 1A-1C show different forms of the spreader in a general view, Fig. 2A-2C show different forms of plates from which the targets can be made, Figs. 3A-3D show different forms of a hook, Fig. 4 shows a side view of the diffuser mounted in the light fixture. The utility model light diffuser shown in various embodiments in Figs. 1A, 1B, and 1C has an elongated body including a convex perforated disc 10, 20. The disc may be reflective on the convex side, which causes light rays to be reflected away from the disc. The disc 10, 20 may be formed from a suitably bent sheet metal, and the disc may have a cross sectional shape, an ellipse 10 as shown in Figs. 1A, 1C or a V-shape 20 as shown in Fig. 1B. One mounting fixture 30, as shown in Fig. 1C, or two mounting fixtures 30, 40, as shown in Figs. 2A, 2B, may be mounted to the disc 10, 20 on the convex side. Each fastening fixture 30, 40 is in the form of a hook, the hook having an elastic eye 31, 41 and a hook arm 32, 42. The eye of the hook 31, 41 can be formed, for example, by correspondingly bending a strip of spring plate. The hook arm 32, 42 connects the perforated disc 10, 20 with the eye of the hook 31, 41. The hook arm may be cylindrical in shape, fixed with one base to the perforated disc 10, 20 and the other base to the hook eye 31, 41 by screws 33, 44. In the two-hook pattern embodiments shown in Figs. 1A and 1B, the hooks 30, 40 are mounted against the bent edges along the longitudinal axis of the disc 10,20. In the single-hook pattern shown in Fig. 1C, the hook 30 is mounted. at the center of gravity of the wheel 10, 20. Figs. 2A-2C show different forms of perforated plates from which the disks 10, 20 can be formed by suitable bending: the form of a perforated rectangular plate shown in Fig 2A, the form of a rectangular plate with partially cut corners shown in Fig. 2B, or the hexagonal sheet form shown in Fig. 2C. The cut corners of the shield allow to increase the intensity of the light beam reaching the farthest areas of the illuminated surface. Figures 3A-3D show different forms of hooks 30, 40 in cross-section, with Figures 3A, 3B showing hooks with an open eye having a circular segment shape in cross-section, and Figures 3C, 3D showing hooks with a spiral-closed eye. which has a spiral shape in cross section. Fig. 4 shows a side view of the diffuser in the embodiment mounted in a lamp holder with a light source 50. The light sources 50 in the sockets 51 of the plant lighting fixtures usually have longitudinal cylindrical bodies. The utility model diffuser is intended to be attached directly to the light source body 50. The spirally closed hook eye 30, 40 can fit snugly against the light source body 50 around its circumference, so that the target 10, 20 is not free to move along the source body axis. lights 50. The utility model diffuser can therefore be installed in a variety of lighting fixtures with a light source having a cylindrical body, regardless of the type of light source socket 51 used. The use of the spiral-closed eye hooks 31, 41 allows the diffuser to be mounted on the light source bodies 50 of different diameters. The double hook discs shown in Figs. 1A, 1B may have hooks having a lower load capacity than the single hook discs shown in Fig. 1C. Protective Claims 1. A light diffuser for light sources with an oblong body, comprising a convex perforated disc, characterized in that on the convex side of the disc (10, 20) there is at least one hook-like fastening fixture (30, 40) with an elastic eye ( 31, 41). 2. A diffuser according to claim Device according to claim 1, characterized in that the hook eye (31, 41) has the shape of a circular sector in cross-section. 3. A diffuser as claimed in claim 1 Device according to claim 1, characterized in that the hook eye (31, 41) has a spiral shape in cross-section. 4. A diffuser according to claim 1 The method of claim 1, wherein the disc (20) has a V-shaped cross section. 5. A diffuser according to claim 1 6. The method of claim 1, characterized in that the disc (10) has the cross-sectional shape of an ellipse-fragmented curvature. 6. A diffuser as claimed in claim 1 The method of claim 1, wherein the disc (10, 20) has cut corners. 7. A diffuser as claimed in claim 1 The method of claim 1, characterized in that on the convex side of the disc (10, 20) there are two mounting lugs (30, 40).