A strip light used in a display cabinet

Abstract

The present invention discloses a strip light used in a display cabinet, comprising: a strip light frame, arranged opposite to an irradiation surface; a circuit board, arranged on the strip light frame; at least three light sources, arranged at intervals on the light source mounting surface along the length direction of the strip light frame, and provided with a main optical axis perpendicular to the circuit board; at least three optical elements; the optical elements comprise: a first light splitting element, provided with at least two groups, comprising two first light splitting surfaces distributed on both sides of the main optical axis of the light source, the first light splitting surfaces guiding the light of the light source on the main optical axis and its vicinity outward along the width direction of the strip light frame and projecting it to the far end of the irradiation surface; a stretching element, provided with at least one group, each group being located between two adjacent groups of first light splitting elements, comprising a light stretching surface for diffusing the light of the light source along the length direction of the strip light frame and projecting it to the irradiation surface directly in front of the adjacent group of first light splitting elements.

Description

Technical Field

[0001] The invention relates to the technical field of lighting fixtures, in particular to a strip light used in a display cabinet. Background Art

[0002] Current cabinets or display cabinets are equipped with lighting, but most of them are installed on the top of the cabinet body. If there are multiple compartments in the cabinet or display cabinet, the lighting cannot illuminate the lower part of the cabinet or display cabinet. Or, each compartment of the current cabinet or display cabinet is equipped with a lighting, although each compartment is illuminated by light, multiple layers are equipped with lighting, resulting in a waste of resources.

[0003] Specifically, the refrigerated display cabinet has a door frame assembly installed at the front of the display cabinet, and the door frame assembly includes corresponding side frame components, and a top frame component and a bottom frame component respectively interconnected with the side frame components. The door is mounted to these frame components by hinges. The vertical frame is mounted on the top and bottom frame components. The known LED lighting system for illuminating the display cabinet is usually designed to provide a certain vertical distance, which is the vertical distance between the light source and the irradiation surface, and the irradiation surface is the plane to be illuminated. In order to illuminate the irradiation surfaces on both sides of the vertical frame at the same time, some researchers have proposed strip lights that emit light on both sides. Although this LED strip light can achieve double-sided light emission and meet the lighting needs between two adjacent compartments of a cabinet or a display cabinet, it is necessary to use two rows of light sources to illuminate the two sides respectively, which has high manufacturing costs and a relatively complex structure. Summary of the invention

[0004] In view of this, the present invention provides a strip light used in a display cabinet to solve the above technical problems.

[0005] A strip light for use in a display cabinet, comprising:

[0006] The strip light frame is arranged relative to the irradiation surface;

[0007] A circuit board is arranged on the strip light frame and is provided with a light source mounting surface facing the irradiation surface;

[0008] At least three light sources are arranged on the light source mounting surface at intervals along the length direction of the strip light holder, and are provided with a main optical axis perpendicular to the circuit board;

[0009] At least three optical elements, one for each light source;

[0010] The optical element comprises:

[0011] The first light splitting element is provided with at least two groups, each group includes at least one first light splitting surface, and includes two first light splitting surfaces distributed on both sides of the main optical axis of the light source, and the first light splitting surfaces guide the light of the light source on the main optical axis and its vicinity to the outside along the width direction of the strip light frame and project it to the far end of the irradiation surface;

[0012] There is at least one group of stretching elements, each group has at least one stretching element, and each group is located between two adjacent groups of first splitting elements, including a light stretching surface that diffuses the light from the light source along the length direction of the strip light frame and projects it onto the irradiation surface directly in front of the adjacent group of first splitting elements.

[0013] Preferably, the first beam splitting element adopts a first beam splitting lens whose first beam splitting surface is a total reflection surface. The first beam splitting lens also includes a first light incident surface arranged in the light emitting direction of the light source and a first light emitting surface distributed on both sides of the main optical axis of the light source. The first beam splitting surface is located above the first light incident surface along the light emitting direction of the light source, and the first light emitting surface is located on the outside of the first beam splitting surface on the same side.

[0014] Preferably, a first countersunk hole for accommodating the light source is provided on the bottom surface of the first beam splitting element, and an inner wall of the first countersunk hole constitutes the first light incident surface.

[0015] Preferably, the first light-splitting surface is an arc-shaped light-collecting surface along the length direction of the strip light bracket.

[0016] Preferably, the first countersunk hole includes a circular arch top surface whose length extends along the width direction of the strip light bracket and circular arc side surfaces arranged on both sides of the length direction of the circular arch top surface, and most of the light passing through the circular arch top surface is refracted to the first light splitting surface, and most of the light passing through the circular arc side surfaces is refracted to the first light emitting surface.

[0017] Preferably, the first light emitting surface is perpendicular to the light source mounting surface.

[0018] Preferably, the first beam splitting element further comprises a first collimating surface arranged between the first light incident surface and the first light emitting surface for totally reflecting the large-angle light of the light source to the first beam splitting surface.

[0019] Preferably, the first collimating surface is a rotating surface with the main optical axis as the central axis.

[0020] Preferably, the first light splitting surface is a straight surface extending along the length direction of the strip light bracket.

[0021] Preferably, the first countersunk hole includes a cylindrical side surface extending in a direction perpendicular to the light source mounting surface and a focusing arc top surface, and most of the light passing through the arc top surface is refracted to the first beam splitting surface, and most of the light passing through the cylindrical side surface is refracted to the first collimating surface.

[0022] Preferably, the first light emitting surface is perpendicular to the light source mounting surface.

[0023] Preferably, the first light splitting element adopts a reflective cup whose first light splitting surface is a reflective surface.

[0024] Preferably, the stretching element is a second beam splitting element whose beam splitting direction is perpendicular to the first beam splitting element, and includes two second beam splitting surfaces distributed on both sides of the main optical axis of the light source, and the second beam splitting surfaces guide the light of the light source on the main optical axis and its vicinity outward along the length direction of the strip light bracket and project it onto the irradiation surface directly in front of the adjacent group of first beam splitting elements.

[0025] Preferably, the second beam splitting element adopts a second beam splitting lens whose second beam splitting surface is a total reflection surface. The second beam splitting lens also includes a second light incident surface arranged in the light emitting direction of the light source and second light emitting surfaces distributed on both sides of the main optical axis of the light source. The second beam splitting surface is located above the second light incident surface along the light emitting direction of the light source, and the second light emitting surface is located on the outside of the second beam splitting surface on the same side.

[0026] Preferably, a second countersunk hole for accommodating the light source is provided on the bottom surface of the second beam splitting element, and an inner wall of the second countersunk hole constitutes the second light incident surface.

[0027] Preferably, the second light-splitting surface is an arc-shaped light-collecting surface along the length direction of the strip light bracket.

[0028] Preferably, the second beam splitting element further comprises a second collimating surface arranged between the second light incident surface and the second light emitting surface for totally reflecting the large-angle light of the light source to the second beam splitting surface.

[0029] Preferably, the second collimating surface is a rotating surface with the main optical axis as the central axis.

[0030] Preferably, the second light splitting surface is a straight surface extending along the width direction of the strip light bracket.

[0031] Preferably, the second light splitting element adopts a reflective cup whose second light splitting surface is a reflective surface.

[0032] Preferably, the stretching element adopts a stretching lens, which includes a second light-incoming surface and two third light-emitting surfaces distributed on both sides of the main optical axis of the light source, and the third light-emitting surfaces diffuse the light outward along the length direction of the strip light rack and project it onto the irradiation surface directly in front of the first splitting element of the adjacent group.

[0033] Preferably, the third light emitting surface focuses the light along the width direction of the strip light bracket.

[0034] Preferably, a second countersunk hole for accommodating the light source is provided on the bottom surface of the stretching element, and an inner wall of the second countersunk hole constitutes the second light-incoming surface.

[0035] Technical effects of the present invention:

[0036] The strip light used in the display cabinet of the present invention has part of the optical elements splitting the light of a single row of light sources along the width direction of the lamp body to the far end of the irradiation surface, thereby increasing the irradiation range, and another part of the optical elements stretches the irradiation range of another part of the light sources along the length direction of the lamp body, thereby filling the dark area on the irradiation surface caused by the splitting, thereby obtaining a lighting effect with a large irradiation range and no dark area. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein:

[0038] Figure 1 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 1.

[0039] Figure 2 1 is a light path diagram of a cross section of the first light splitting element in Example 1 in a direction perpendicular to the length of the lamp body.

[0040] Figure 3 Schematic diagram of the structure of the first light splitting element of Example 1 and a schematic cross-sectional view along the AA direction.

[0041] Figure 4 Schematic diagram of the three-dimensional structure of the first light splitting element of Example 1 at two different viewing angles.

[0042] Figure 5 This is a light path diagram of the cross section of the tensile element of Example 1 in the direction perpendicular to the width of the lamp body.

[0043] Figure 6 It is a schematic diagram of the structure of the tensile element of Example 1 and a schematic cross-sectional view in the BB direction.

[0044] Figure 7 Schematic diagram of the three-dimensional structure of the tensile element of Example 1 at two different viewing angles.

[0045] Figure 8This is a light intensity distribution diagram of the strip light used in the display cabinet of Example 1 (the light source in the tensile element is not lit) on the irradiated surface.

[0046] Fig. 9 This is a light intensity distribution diagram of the strip light (lighting the light source in the tensile element) used in the display cabinet of Example 1 on the irradiated surface.

[0047] Fig.10 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 2.

[0048] Fig.11 This is a light path diagram of the cross section of the first beam splitter element of Example 2 in the direction perpendicular to the length of the lamp body.

[0049] Fig.12 Schematic diagram of the structure of the first spectroscopic element of Example 2 and a schematic cross-sectional view in the CC direction.

[0050] Fig.13 Schematic diagram of the three-dimensional structure of the first light splitting element of Example 2 at two different viewing angles.

[0051] Fig.14 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 3.

[0052] Fig.15 This is a light path diagram of the cross section of the first beam splitter element of Example 3 in the direction perpendicular to the length of the lamp body.

[0053] Fig.16 Schematic diagram of the three-dimensional structure of the first light splitting element of Example 3.

[0054] Fig.17 This is a schematic diagram of the three-dimensional structure of a strip light used in a display cabinet according to Example 4.

[0055] Fig.18 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 5.

[0056] Fig.19 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 6.

[0057] Fig. 20 This is a schematic diagram of the three-dimensional structure of a strip light used in a display cabinet according to Example 7.

[0058] Fig.21 This is a schematic diagram of the three-dimensional structure of the strip light used in the display cabinet according to Example 8. DETAILED DESCRIPTION

[0059] The specific embodiments of the present invention are further described in detail below based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0060] Example 1

[0061] like Figures 1 to 8 As shown, the strip light used in the display cabinet of this embodiment includes a strip light frame 100, a circuit board 300, a light source 400 and an optical element.

[0062] The strip light of this embodiment is used in a display cabinet, especially in a refrigerated display cabinet. The strip light is installed on a vertical frame or a horizontal frame inside the display cabinet, and then a certain vertical distance is set from the irradiation surface 200 to realize the lighting of goods.

[0063] In this embodiment, the strip light frame 100 is arranged relative to the irradiation surface 200, the circuit board 300 is arranged on the strip light frame 100, and a light source mounting surface 301 facing the irradiation surface 200 is provided, and at least three light sources 400 are arranged on the light source mounting surface 301 at intervals along the length direction of the strip light frame 100, and a main optical axis 401 perpendicular to the circuit board 300 is provided. The above structure is a prior art, and in order to achieve uniformity of illumination, optical elements are generally provided for each light source 400, so as to achieve the desired lighting effect. From the perspective of energy saving and high efficiency, the light source 400 adopts LED chips, and the strip light frame 100 is generally provided with heat dissipation cavity, plug wiring, end cover and other structures, which are not the focus of this application and can be selected according to needs in the prior art, and will not be repeated here.

[0064] In order to realize the lighting on both sides of the width direction of the strip light, the optical element includes a first beam splitter element 500. The first beam splitter element 500 is provided with at least two groups, each group having at least one beam splitter. The purpose of the first beam splitter element 500 is to realize large-angle lighting. At least two groups are provided to realize the lighting of a certain area in the length direction of the lamp body (the length direction of the vertical frame or the horizontal frame). In each group, there can be one or more light sources 400, corresponding to the same number of light sources, which is generally related to the length of the lighting.

[0065] The first light splitting element 500 includes two first light splitting surfaces 501 distributed on both sides of the main optical axis of the light source 400. The first light splitting surfaces 501 guide the light of the light source 400 on and near the main optical axis 401 outward along the width direction of the strip light frame 100 and project it to the far end of the irradiation surface 200. By providing two first light splitting surfaces 501, the light on and near the main optical axis 401 is split outward along the width direction of the strip light frame 100, thereby achieving wide-angle irradiation, thereby achieving a large illumination range on the irradiation surface 200.

[0066] However, after the light of the main optical axis 401 and its vicinity is split, a dark area will be formed in the corresponding area, that is, a dark area will be formed on the illumination surface 200 directly in front of the two first splitting surfaces 501, resulting in uneven brightness of the illumination surface, affecting the lighting effect. Figure 7 shown.

[0067] To this end, in this embodiment, the optical element includes a stretching element 600, and the stretching element 600 is provided with at least one group, and each group has at least one, and its purpose is to illuminate the above-mentioned dark area. Therefore, each group is located between two adjacent groups of first light splitting elements 500, and each group of stretching elements 600 is used to irradiate the light of its corresponding light source 400 to the dark area, so that the overall lighting effect of the irradiated surface 200 becomes uniform. In order to achieve the above function, the stretching element 600 of this embodiment includes a light stretching surface 606 that diffuses the light of the light source 400 along the length direction of the strip light frame and projects it to the irradiated surface 200 directly in front of the adjacent group of first light splitting elements 500, thereby eliminating the dark area and achieving uniform lighting, such as Figure 8 shown.

[0068] The first light splitting elements 500 and the stretching elements 600 are arranged in groups at intervals, and the number of each group can be set as needed. In the embodiment, there is one in a group, and the first light splitting elements 500 and / or the stretching elements 600 can also be two or more in a group.

[0069] In this embodiment, the length direction of the strip light rack 100 is consistent with the length direction of the mounting frame (vertical frame or horizontal frame), which is defined as the x-axis. The width direction is perpendicular to the length direction, which is defined as the y-axis. The z-axis is perpendicular to the xy plane. The main optical axis 401 of the light source 400 is parallel to the z-axis. The length direction of the circuit board 300 is parallel to the x-axis, and the width direction is parallel to the y-axis.

[0070] The light splitting function of the first light splitting element 500 can be realized by total reflection of a lens, or by reflection of a reflective material. Specifically, in the present embodiment, the first light splitting element 500 adopts a first light splitting lens with a first light splitting surface 501 as a total reflection surface, and the first light splitting lens also includes a first light inlet surface 502 arranged in the light emitting direction of the light source 400 and first light outlet surfaces 503 distributed on both sides of the main optical axis of the light source 400, the first light splitting surface 501 is located above the first light inlet surface 502 along the light emitting direction of the light source 400, and the first light outlet surface 503 is located on the outer side of the first light splitting surface 501 on the same side.

[0071] In order to improve the light efficiency and fully utilize the light output of the light source 400 , in this embodiment, the bottom surface of the first beam splitter element 500 is provided with a first countersunk hole 504 for accommodating the light source 400 , and the inner wall of the first countersunk hole 504 constitutes the first light incident surface 502 .

[0072] In order to improve the lighting effect, the light emitted by the light source 400 needs to be focused in the length direction. Therefore, in this embodiment, the first splitting surface 501 is an arc-shaped focusing surface along the length direction of the strip light rack 100. In order to make the light output uniform, the focusing surface is symmetrically arranged relative to the main optical axis 401.

[0073] The first countersunk hole 504 includes a circular arch top surface 5041 extending along the width direction of the strip light holder 100 and circular arc side surfaces 5042 arranged on both sides of the length direction of the circular arch top surface 5041. Most of the light passing through the circular arch top surface 5041 is refracted to the first light splitting surface 501, and most of the light passing through the circular arc side surfaces 5042 is refracted to the first light emitting surface 503. The structure of the first countersunk hole 504 can first focus the emitted light to improve the light emitting efficiency.

[0074] The first light emitting surface 503 can further refract the light after total reflection. In this embodiment,

[0075] The first light emitting surface 503 is perpendicular to the light source installation surface 301 .

[0076] The first beam splitter lens of this embodiment can achieve large-angle beam splitting, and the illumination is uniform on the irradiation surface 200. The disadvantage is that there is almost no light directly below the first beam splitter lens, and there is a dark area at the position directly opposite the lens (directly in front of the main optical axis) on the irradiation surface 200. When arranged continuously, a strip-shaped dark area will be formed directly in front of the lamp body.

[0077] In order to eliminate the above-mentioned dark area, the stretching element 600 adopts a stretching lens, which includes a second light input surface 602 and two third light output surfaces 601' distributed on both sides of the main optical axis 401 of the light source 400. The third light output surfaces 601' diffuse the light outward along the length direction of the strip light rack 100 and project it onto the irradiation surface 200 directly in front of the adjacent group of first light splitting elements 500. The two third light output surfaces 601' interact and are concave at the main optical axis 401. In order to make the light output more uniform, the third light output surfaces 601' on both sides are arc-shaped curved surfaces.

[0078] In order to improve the light effect, the third light emitting surface 601' focuses the light along the width direction of the strip light frame 100. The third light emitting surface 601' focuses the light along the width direction of the strip light frame 100 and is an arc-shaped curved surface.

[0079] In order to improve the lighting effect, the bottom surface of the stretching element 600 is provided with a second countersunk hole 604 for accommodating the light source 400, and the inner wall of the second countersunk hole 604 constitutes the second light-incoming surface 602. For the convenience of manufacturing, the second countersunk hole 604 is a focusing curved surface in both the width and length directions of the strip light bracket 100.

[0080] The strip light of this embodiment has a cross arrangement of the first light splitting element 500 and the stretching element 600. The first light splitting element 500 enables the single-row light source 400 to achieve large-angle light splitting, while the stretching element 600 fills the unevenness of the dark area, thereby obtaining a large and uniform irradiation area 200 as a whole.

[0081] Example 2

[0082] like Figures 9 to 13 As shown, the strip light used in the display cabinet of this embodiment has the same structure as that of the first embodiment except for the structures of the first light splitting element 500 and the stretching element 600.

[0083] In this embodiment, the first beam splitter element 500 further includes a first collimating surface 505 disposed between the first light incident surface 502 and the first light emitting surface 503 for totally reflecting the large-angle light of the light source to the first beam splitter surface 501. Large-angle light is relative to small-angle light, the main optical axis of the light source and the light near it is small-angle light, and the light outside the small-angle light is large-angle light.

[0084] In Example 1, all light is focused in the length direction and split in the width direction, and both are achieved simultaneously through the first splitting surface, so many light rays are refracted without being split. In this embodiment, in order to improve the light efficiency, the light rays are collimated first, and then most of the light is projected onto the first splitting surface 501 for splitting. Preferably, the first collimating surface 505 is a rotating surface with the main optical axis 401 as the central axis. The setting of the rotating surface can fully reflect as much light from the light source as possible to the first splitting surface 501, thereby improving the light efficiency.

[0085] Since the light is collimated first, in this embodiment, the first light splitting surface 501 is a straight surface extending along the length direction of the strip light holder 100 .

[0086] In order to further improve the light efficiency, in this embodiment, the first countersunk hole 504 includes a cylindrical side surface 5043 extending in a direction perpendicular to the light source installation surface 301 and a light-collecting arc top surface 5044, and most of the light passing through the arc top surface 5044 is refracted to the first light splitting surface 501, and most of the light passing through the cylindrical side surface 5043 is refracted to the first collimating surface 505. For the convenience of manufacturing, the first light emitting surface 503 is perpendicular to the light source installation surface 301.

[0087] In this embodiment, the stretching element 600 is a second beam splitting element whose beam splitting direction is perpendicular to the first beam splitting element 500, and includes two second beam splitting surfaces distributed on both sides of the main optical axis of the light source 400. The second beam splitting surfaces guide the light of the light source 400 on the main optical axis 401 and its vicinity outward along the length direction of the strip light rack 100 and project it onto the irradiation surface 200 directly in front of the adjacent group of first beam splitting elements 500.

[0088] It can be seen that the structure of the stretching element 600 in this embodiment is the same as that of the first light splitting element 500 in Example 1, but the light splitting directions are different and perpendicular to each other, so that the dark area generated by the first light splitting element 500 can be supplemented with light.

[0089] Specifically, the structural diagram refers to the first beam splitter element 500 in Example 1, and the second beam splitter element adopts a second beam splitter lens with a second beam splitter surface 601 (501) (Note: the numbers in brackets are the markings in Example 1, and the numbers are interchangeable due to the same structure) as a total reflection surface, and the second beam splitter lens also includes a second light incident surface 602 (502) arranged in the light emitting direction of the light source 400 and a second light emitting surface 603 (503) distributed on both sides of the main optical axis of the light source 400, the second beam splitter surface 601 (501) is located above the second light incident surface 602 (502) along the light emitting direction of the light source 400, and the second light emitting surface 603 (503) is located on the outer side of the second beam splitter surface 601 (501) on the same side.

[0090] In order to improve the light efficiency, the bottom surface of the second light splitting element is provided with a second countersunk hole 604 (504) for accommodating the light source 400, and the inner wall of the second countersunk hole 604 (504) constitutes the second light-incoming surface 602 (502). In order to improve the uniformity of illumination and improve the light efficiency, the second light splitting surface 601 (501) is an arc-shaped light-collecting surface along the length direction of the strip light stand 100.

[0091] Example 3

[0092] like Figures 14 to 16 As shown, the strip light used in the display cabinet of this embodiment has the same structure as that of the first embodiment except for the structures of the first light splitting element 500 and the stretching element 600.

[0093] In this embodiment, the first light splitting element 500 uses a reflective cup with a first light splitting surface 501 as a reflective surface. The light from the light source 400 is irradiated to the first light splitting surface 501 of the reflective cup and reflected, and then irradiated to the irradiated surface. In this embodiment, the first light splitting surface 501 of the reflective cup has a moire structure.

[0094] In this embodiment, the stretching element 600 adopts a second beam splitter element, and also includes a second collimating surface 605 (505) arranged between the second light-incoming surface 602 (502) and the second light-emitting surface 603 (503) to totally reflect the large-angle light of the light source to the second beam splitter surface 601 (501). The structure of the second beam splitter element in this embodiment is the same as that of the first beam splitter element 500 in Example 2, and the beam splitting directions are perpendicular to each other. The structural picture refers to the first beam splitter element 500 in Example 2.

[0095] The second collimating surface 605 (505) is a rotating surface with the main optical axis 401 as the central axis. The setting of the rotating surface can fully reflect as much light from the light source as possible to the second light splitting surface 601 (501), thereby improving the light efficiency. Since the light is collimated first, the second light splitting surface 601 (501) of this embodiment is a straight surface extending along the width direction of the strip light bracket 100.

[0096] The second light splitting element may also be a reflective cup with the second light splitting surface 601 as a reflective surface. In this case, the light splitting direction is perpendicular to the light splitting direction of the reflective cup in this embodiment.

[0097] To summarize, the first light splitting element 500 of the present invention can adopt any form of Examples 1, 2 and 3, and the stretching element 600 can also adopt any form of Examples 1, 2 and 3 or the form of a reflective cup. The above-mentioned first light splitting element 500 and stretching element 600 can be combined in any way to achieve the effect of large-angle uniform illumination without dark areas.

[0098] Example 4

[0099] like Fig.17 As shown, in the strip light used in the display cabinet of this embodiment, the first light splitting element 500 is the same as that in the first embodiment, and the stretching element 600 is the same as that in the third embodiment.

[0100] Example 5

[0101] like Fig.18 As shown, in the strip light used in the display cabinet of this embodiment, the first light splitting element 500 is the same as that in the second embodiment, and the stretching element 600 is the same as that in the first embodiment.

[0102] Example 6

[0103] like Fig.19 As shown, in the strip light used in the display cabinet of this embodiment, the first light splitting element 500 is the same as that in the third embodiment, and the stretching element 600 is the same as that in the first embodiment.

[0104] Example 7

[0105] like Fig. 20As shown, in the strip light used in the display cabinet of this embodiment, the first light splitting element 500 is the same as that in the third embodiment, and the stretching element 600 is the same as that in the second embodiment.

[0106] Example 8

[0107] like Fig.21 As shown, in the strip light used in the display cabinet of this embodiment, the number of each group of first light splitting elements 500 is different from that in the embodiment 1, and the rest of the structure is the same as that in the embodiment 1.

[0108] In order to realize the illumination on both sides of the width direction of the strip light, the optical element of the present invention includes a first light splitting element 500 and a stretching element 600. The first light splitting element 500 is provided with at least two groups, each group having at least one light splitting element. The purpose of the first light splitting element 500 is to realize the illumination at a large angle. At least two groups are provided to realize the illumination of a certain length area in the length direction of the lamp body (the length direction of the vertical frame or the horizontal frame). In each group, there can be one or more light splitting elements, and the number of each group can be the same or different. The same number of light sources 400 are provided correspondingly, which is generally related to the length of the illumination. The stretching element 600 is provided with at least one group, each group having at least one light splitting element. The purpose is to illuminate the above-mentioned dark area. Therefore, each group is located between two adjacent groups of first light splitting elements 500. Each group of stretching elements 600 is used to illuminate the light of its corresponding light source 400 to the dark area, so that the overall illumination effect of the irradiated surface 200 becomes uniform. In each group, there can be one or more light splitting elements, and the number of each group can be the same or different.

[0109] In this embodiment, each group of first light splitting elements 500 is provided with two, and the structure is the same as that of embodiment 1; each group of stretching elements 600 is provided with one, and the structure is the same as that of embodiment 1.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A strip light for use in a display cabinet, comprising: A strip-shaped light frame (100) is arranged opposite to the irradiation surface (200); A circuit board (300) is arranged on a strip light frame (100), and is provided with a light source installation surface (301) facing the irradiation surface (200); at least three light sources (400) are arranged on the light source installation surface (301) at intervals along the length direction of the strip light frame (100), and are provided with a main optical axis (401) perpendicular to the circuit board (300); at least three optical elements are arranged respectively corresponding to each light source (400); characterized in that the optical elements include: The first light splitting element (500) is provided with at least two groups, each group having at least one first light splitting surface (501) distributed on both sides of the main optical axis of the light source (400), wherein the first light splitting surface (501) guides the light of the light source (400) on the main optical axis (401) and its vicinity to the outside along the width direction of the strip light frame (100) and projects it to the far end of the irradiation surface (200); The stretching element (600) is provided with at least one group, each group having at least one member, and each group is located between two adjacent groups of first light splitting elements (500), and comprises a light stretching surface (606) for diffusing the light of the light source (400) along the length direction of the strip light frame and projecting the light onto the irradiation surface (200) directly in front of the adjacent group of first light splitting elements (500); The stretching element (600) is a second beam splitting element with a beam splitting direction perpendicular to the first beam splitting element (500), and comprises two second beam splitting surfaces (601) distributed on both sides of the main optical axis of the light source (400), wherein the second beam splitting surfaces (601) guide the light of the light source (400) on the main optical axis (401) and its vicinity outward along the length direction of the strip light frame (100) and project the light onto the irradiation surface (200) directly in front of the adjacent group of first beam splitting elements (500).

2. The strip light for use in a display cabinet as claimed in claim 1, characterized in that: The first light splitting element (500) adopts a first light splitting lens having a first light splitting surface (501) as a total reflection surface, the first light splitting lens further comprising a first light inlet surface (502) arranged in the light emitting direction of the light source (400) and a first light outlet surface (503) distributed on both sides of the main optical axis of the light source (400), the first light splitting surface (501) being located above the first light inlet surface (502) along the light emitting direction of the light source (400), and the first light outlet surface (503) being located on the outer side of the first light splitting surface (501) on the same side.

3. The strip light for use in a display cabinet as claimed in claim 2, characterized in that: The bottom surface of the first light splitting element (500) is provided with a first countersunk hole (504) for accommodating the light source (400), and the inner wall of the first countersunk hole (504) constitutes the first light-incoming surface (502).

4. The strip light for use in a display cabinet as claimed in claim 3, characterized in that: The first light splitting surface (501) is an arc-shaped light collecting surface along the length direction of the strip-shaped light bracket (100).

5. The strip light for use in a display cabinet as claimed in claim 4, characterized in that: The first countersunk hole (504) comprises a circular arch top surface whose length extends along the width direction of the strip light holder (100) and circular arc side surfaces (5042) arranged on both sides of the length direction of the circular arch top surface (5041); most of the light passing through the circular arch top surface (5041) is refracted to the first light splitting surface (501), and most of the light passing through the circular arc side surfaces (5042) is refracted to the first light emitting surface (503).

6. The strip light for use in a display cabinet as claimed in claim 5, characterized in that: The first light emitting surface (503) is perpendicular to the light source installation surface (301).

7. The strip light for use in a display cabinet as claimed in claim 3, characterized in that: The first light splitting element (500) further comprises a first collimating surface (505) arranged between the first light input surface (502) and the first light output surface (503) for totally reflecting the large-angle light of the light source to the first light splitting surface (501).

8. The strip light for use in a display cabinet as claimed in claim 7, characterized in that: The first collimating surface (505) is a rotating surface with the main optical axis (401) as the central axis.

9. The strip light for use in a display cabinet as claimed in claim 8, characterized in that: The first light splitting surface (501) is a flat surface extending along the length direction of the strip light bracket (100).

10. The strip light for use in a display cabinet as claimed in claim 9, characterized in that: The first countersunk hole (504) comprises a cylindrical side surface (5043) whose height extends in a direction perpendicular to the light source mounting surface (301) and a light-collecting arc top surface (5044); most of the light passing through the arc top surface (5044) is refracted to the first beam splitting surface (501), and most of the light passing through the cylindrical side surface (5043) is refracted to the first collimating surface (505).

11. The strip light for use in a display cabinet as claimed in claim 9, characterized in that: The first light emitting surface (503) is perpendicular to the light source installation surface (301).

12. The strip light for use in a display cabinet as claimed in claim 1, characterized in that: The first light splitting element (500) uses a reflective cup with a first light splitting surface (501) as a reflective surface.

13. The strip light for use in a display cabinet as claimed in claim 1, characterized in that: The second light splitting element adopts a second light splitting lens with a second light splitting surface (601) as a total reflection surface, the second light splitting lens also includes a second light input surface (602) arranged in the light output direction of the light source (400) and second light output surfaces (603) distributed on both sides of the main optical axis of the light source (400), the second light splitting surface (601) is located above the second light input surface (602) along the light output direction of the light source (400), and the second light output surface (603) is located on the outer side of the second light splitting surface (601) on the same side.

14. The strip light for use in a display cabinet as claimed in claim 13, characterized in that: The bottom surface of the second light splitting element is provided with a second countersunk hole (604) for accommodating the light source (400), and the inner wall of the second countersunk hole (604) constitutes the second light entrance surface (602).

15. The strip light for use in a display cabinet as claimed in claim 14, characterized in that: The second light splitting surface (601) is an arc-shaped light focusing surface along the length direction of the strip-shaped light bracket (100).

16. The strip light for use in a display case as claimed in claim 14, characterized in that: The second light splitting element further comprises a second collimating surface (605) arranged between the second light incident surface (602) and the second light emitting surface (603) for totally reflecting the large-angle light of the light source to the second light splitting surface (601).

17. The strip light for use in a display case as claimed in claim 16, characterized in that: The second collimating surface (605) is a rotating surface with the main optical axis (401) as the central axis.

18. The strip light for use in a display case as claimed in claim 17, characterized in that: The second light splitting surface (601) is a flat surface extending along the width direction of the strip light bracket (100).

19. The strip light for use in a display cabinet as claimed in claim 1, characterized in that: The second light splitting element adopts a reflective cup with the second light splitting surface (601) as a reflective surface.

20. The strip light used in a display cabinet according to any one of claims 1 to 12, characterized in that: The stretching element (600) adopts a stretching lens, which comprises a second light-incoming surface (602) and two third light-emitting surfaces (601') distributed on both sides of the main optical axis (401) of the light source (400), and the third light-emitting surfaces (601') diffuse the light outward along the length direction of the strip light frame (100) and project the light onto the irradiation surface (200) directly in front of the first light-splitting element (500) of the adjacent group.

21. The strip light for use in a display case as claimed in claim 20, characterized in that: The third light emitting surface (601') focuses the light and emits the light along the width direction of the strip light frame (100).

22. The strip light for use in a display case as claimed in claim 21, characterized in that: The bottom surface of the stretching element (600) is provided with a second countersunk hole (604) for accommodating the light source (400), and the inner wall of the second countersunk hole (604) constitutes the second light-incoming surface (602).

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