CN111623283A - Lighting lamp - Google Patents

Abstract

The present invention provides a lighting fixture, comprising: a housing assembly; a Rayleigh scattering plate, arranged on the housing assembly; The light emitting part emits a total reflection lens of the exit angle of the light beam, the light emitting part is inclined relative to the Rayleigh scattering plate, and the total reflection lens is arranged at the light emitting part; the first shading part is arranged between the Rayleigh scattering plate and the light emitting component. In order to solve the technical problem that the lighting fixture in the prior art cannot simulate the illumination effect of the blue sky in a natural state.

Description

lighting fixtures

technical field

The present invention relates to the technical field of lighting devices, and in particular, to a lighting fixture.

Background technique

At present, the light sources of existing lighting fixtures are mainly white light, yellow light and RGB color light, and the actual use state is relatively monotonous.

However, using the lighting fixtures in the prior art, especially in some windowless environments (such as storage rooms, basements, conference rooms, etc.), although there are lighting sources, the lighting fixtures cannot simulate the effect of the blue sky in the natural state, which will give People have a heavier sense of depression.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a lighting fixture to solve the technical problem that the lighting fixture in the prior art cannot simulate the illumination effect of the blue sky in a natural state.

In order to achieve the above object, the present invention provides a lighting fixture, comprising: a housing component; a Rayleigh scattering plate, which is arranged on the housing component; and a total reflection lens for reducing the outgoing angle of the light beam emitted by the light emitting part, the light emitting part is inclined relative to the Rayleigh scattering plate, and the total reflection lens is arranged at the light emitting part; the first light shielding part is arranged on the Rayleigh scattering plate and the light emitting part. between components.

Further, the housing assembly includes: a base; a light-emitting cover, the light-emitting cover is arranged on the base, the light-emitting cover has a first installation opening and a second installation opening oppositely arranged, the base is arranged at the first installation opening, and the Rayleigh scattering plate is arranged at the second installation port.

Further, the base includes: a bottom plate; a mounting part is disposed on the bottom plate;

Further, there are a plurality of installation parts, and the installation parts are arranged on the base plate at intervals along a preset direction; there are a plurality of light-emitting components, and the plurality of light-emitting components are arranged in a one-to-one correspondence with the plurality of installation parts, and each light-emitting component is arranged in a corresponding installation. Ministry.

Further, the first light-shielding portion is disposed on at least part of the light-emitting assembly, and the light-shielding surface of the first light-shielding portion is perpendicular to the mounting surface of the mounting portion.

Further, there are a plurality of light-emitting components, and the plurality of light-emitting components are arranged at intervals along a preset direction to form a light-emitting array, the light-emitting array has a light-emitting side and a light-shielding side arranged oppositely, and the light-emitting side and the sidewall of the light-emitting cover are spaced to form an avoidance area. , so as to prevent the light emitted from the light-emitting side from being irradiated on the side wall of the light-emitting cover through the avoidance area.

Further, the lighting fixture further includes: a second shading portion, disposed in the avoidance area, and the second shading portion is located on the light-emitting side, so as to block the light emitted from the light-emitting side by the second light-shielding portion.

Further, the housing assembly also includes: a light emitting plate, which is arranged on the light emitting cover, the light emitting plate is located at the second installation opening, and the light emitting plate is located on the side of the Rayleigh scattering plate away from the base, so that the light emitted by the Rayleigh scattering plate can be penetrated. The light is emitted through the light-emitting plate.

Further, the second installation port is provided with a support table and a first clamping structure, the support table is located on the side of the first clamping structure close to the first installation port, and the support table is used to support the Rayleigh scattering plate; There is a second clamping structure matched with the first clamping structure, so that the light emitting plate is installed on the light emitting cover through the cooperation of the first clamping structure and the second clamping structure.

Further, the housing assembly further includes a reinforcing rib; the base is provided with a reinforcing rib; and/or the light-emitting cover is provided with a reinforcing rib.

Further, the installation cross-sectional area of the first installation opening is larger than the installation cross-sectional area of the second installation opening. The side plate, the second side plate and the third side plate all extend in the vertical direction, and at least part of the fourth side plate is arranged at a predetermined angle with the vertical surface.

By applying the technical solution of the present invention, by arranging the light-emitting component and the Rayleigh scattering plate opposite to each other, the illumination effect of the blue sky can be simulated; at the same time, since the total reflection lens and the shading part can absorb the large-angle outgoing light, it can realize the small-angle parallelism The effect of light irradiation, so as to better simulate the light irradiation characteristics of sunlight. Therefore, the technical solution provided by the present invention can solve the technical problem that the lighting fixture in the prior art cannot simulate the illumination effect of the blue sky in a natural state.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 shows a schematic structural diagram of a base and a light-emitting assembly provided according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of the installation of a base and a light-emitting assembly provided according to an embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a light-shielding portion and a light-emitting assembly provided according to an embodiment of the present invention;

FIG. 4 shows a schematic diagram of the installation of the shading part and the light-emitting assembly provided according to an embodiment of the present invention;

5 shows a schematic structural diagram of a base and a light-emitting cover provided according to an embodiment of the present invention;

6 shows a schematic diagram of the installation of a base and a light-emitting cover provided according to an embodiment of the present invention;

FIG. 7 shows a schematic structural diagram of a lighting fixture provided according to an embodiment of the present invention;

8 shows a schematic structural diagram of a housing assembly and a power supply provided according to an embodiment of the present invention;

FIG. 9 shows a cross-sectional view of a lighting fixture provided according to an embodiment of the present invention;

Fig. 10 shows an exploded view of a lighting fixture provided according to an embodiment of the present invention;

FIG. 11 shows the distance relationship between the light emitting part and two adjacent light shielding plates provided according to an embodiment of the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

10, housing assembly; 11, base; 111, bottom plate; 112, installation part; 12, light-emitting cover; 121, first installation port; 122, second installation port; 123, support table; 124, first clamping structure ; 125, the first side plate; 126, the second side plate; 127, the third side plate; 128, the fourth side plate; 13, the light-emitting plate; 131, the second clamping structure; 30, light emitting assembly; 31, light emitting part; 32, total reflection lens; 33, connecting plate; 40, first shading part; 50, power supply.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIGS. 1 to 11 , this embodiment provides a lighting fixture, which includes a housing assembly 10 , a Rayleigh diffusion plate 20 , a light-emitting assembly 30 and a first shading portion 40 . The Rayleigh scattering plate 20 is disposed on the housing assembly 10 , the light emitting assembly 30 is disposed opposite to the Rayleigh scattering plate 20 , and the light emitting assembly 30 includes a light emitting part 31 and a total reflection lens 32 for reducing the exit angle of the light beam emitted by the light emitting part 31 , the light emitting part 31 is arranged obliquely with respect to the Rayleigh scattering plate 20 , and the total reflection lens 32 is arranged at the light emitting part 31 . The first light shielding portion 40 is disposed between the Rayleigh diffusion plate 20 and the light emitting assembly 30 . Specifically, the light-emitting portion 31 here may be an LED lamp bead, and the lighting fixture further includes a power source 50 , and the light-emitting portion 31 is connected to the power source 50 .

With the lighting fixture provided in this embodiment, by arranging the light-emitting portion 31 and the Rayleigh scattering plate 20 obliquely, the light emitted by the Rayleigh scattering plate 20 can achieve a blue sky visual effect. At the same time, the exit angle of the light beam emitted by the light-emitting part 31 is reduced by the total reflection mirror, and the large-angle outgoing light in the light emitted by the light-emitting part 31 is eliminated by the first light shielding part 40, so that the cluttered large-angle light can be avoided. to simulate the slanted and parallel beams of sunlight. Therefore, the technical solution provided by this embodiment can solve the technical problem that the lighting fixture in the prior art cannot simulate the illumination effect of the blue sky in a natural state.

Specifically, the housing assembly 10 in this embodiment includes a base 11 and a light-emitting cover 12 , the light-emitting cover 12 is disposed on the base 11 , and the light-emitting cover 12 has a first installation port 121 and a second installation port 122 arranged oppositely. The base 11 The Rayleigh diffusion plate 20 is provided at the first installation opening 122 , and the Rayleigh diffusion plate 20 is arranged at the second installation opening 122 . With this arrangement, the spatial layout of the lighting fixture can be optimized, so that the Rayleigh scattering plate 20 can better form the lighting effect of the sky. Specifically, the inner surface of the light-emitting cover 12 in this embodiment is provided with a black coating, through which the scattered light can be absorbed, so as to ensure the parallel output of the light paths. At the same time, the above-mentioned spatial layout can complete the simulation of the sense of distance.

Specifically, the base 11 is provided with a first clamping portion, and the light-emitting cover 12 is provided with a second clamping portion adapted to the first clamping portion. With the matching, the base 11 is connected with the light-emitting cover 12, which is convenient for assembly.

Specifically, the light-emitting assembly 30 in this embodiment further includes a connecting board 33, which can be a PCB board, and a plurality of light-emitting parts 31 are provided on the connecting board 33, and each light-emitting part 31 is provided with a corresponding Total reflection lens 32 . Specifically, the connecting plate 33 is a strip-shaped plate, and the light-emitting component 30 is a strip-shaped structure.

In this embodiment, the base 11 includes a bottom plate 111 and a mounting portion 112 , the mounting portion 112 is disposed on the bottom plate 111 , the mounting portion 112 is protruded from the bottom plate 111 , and the mounting surface of the mounting portion 112 is inclined relative to the Rayleigh scattering plate 20 , The light emitting assembly 30 is provided on the mounting surface of the mounting portion 112 . With such a structure, the light-emitting portion 31 and the Rayleigh scattering plate 20 can be inclined to be arranged, and the light-emitting portion 31 can be fixed at a specific angle, so as to ensure that the light path emits light at a preset angle, and at the same time, it is easy to install. Specifically, the light-emitting assembly 30 in this embodiment is a strip-shaped structure, and correspondingly, the mounting portion 112 is also a strip-shaped structure.

Specifically, in this embodiment, there are multiple mounting portions 112 , and the mounting portions 112 are arranged on the bottom plate 111 at intervals along a preset direction. There are a plurality of light emitting assemblies 30 , the plurality of light emitting assemblies 30 are arranged in a one-to-one correspondence with the plurality of mounting portions 112 , and each light emitting assembly 30 is arranged on the corresponding mounting portion 112 . With such a structural arrangement, a plurality of light emitting assemblies 30 can be installed, which is convenient for installation. Specifically, the mounting portion 112 in this embodiment may be a grid support structure, which is convenient for production, manufacture and installation.

In this embodiment, the first light shielding portion 40 is disposed on at least part of the light emitting assembly 30 , and the light shielding surface of the first light shielding portion 40 is perpendicular to the mounting surface of the mounting portion 112 . Specifically, the first light shielding portion 40 may be disposed on the connecting plate 33 .

Specifically, the first shading portion 40 may include a first shading plate, the side of the first shading plate close to the light emitting portion 31 forms a shading surface of the first shading portion 40 , and the first shading plate is perpendicular to the connecting plate 33 . By adopting such a structure, on the one hand, the first shading plate can absorb the outgoing light from a large angle, and on the other hand, the light-emitting component 30 can be effectively blocked, so as to prevent the user from directly seeing these internal devices when looking from the bottom of the lamp, To a certain extent, the effect of "seeing the light but not the light" is realized, which improves the aesthetics and avoids the influence on the light-emitting effect.

Alternatively, the first shading portion 40 includes a first shading plate and a second shading plate, the first shading plate and the second shading plate are vertically arranged, the second shading plate and the connecting plate 33 are attached and arranged, and the first shading plate and the connecting plate 33 Vertically arranged, in this way, the technical effect of absorbing light from a large angle and effectively shielding the light-emitting component 30 can also be achieved.

Specifically, in this embodiment, there are a plurality of light-emitting components 30, and the plurality of light-emitting components 30 are arranged at intervals along a preset direction to form a light-emitting array, and the light-emitting array has oppositely arranged light-emitting sides and light-shielding sides. The end portion is one side of the light-emitting component 30 , and the light-shielding side is the side where the end portion is the light-shielding portion. The light-emitting side and the sidewall of the light-emitting cover 12 are spaced apart to form an avoidance area, so as to prevent the light emitted from the light-emitting side from being irradiated onto the sidewall of the light-emitting cover 12 through the avoidance area.

Specifically, the lighting fixture in this embodiment further includes a second shading portion, the second shading portion is disposed in the avoidance area, and the second shading portion is located on the light emitting side, so as to block the light emitted from the light emitting side by the second shading portion. Specifically, the structure of the second light shielding portion may be the same as that of the first light shielding portion 40 . With such a structure arrangement, the light emitted by the light-emitting portion 31 can be better prevented from being irradiated on the side wall of the light-emitting cover 12, and the light emitted from a large angle can be better absorbed.

In this embodiment, the housing assembly 10 further includes a light-emitting plate 13 , the light-emitting plate 13 is disposed on the light-emitting cover 12 , the light-emitting plate 13 is located at the second installation opening 122 , and the light-emitting plate 13 is located on the Rayleigh scattering plate 20 away from the base 11 . one side, so that the light transmitted by the Rayleigh scattering plate 20 is emitted through the light emitting plate 13 . Specifically, the light emitting plate 13 here can be a decorative window structure, so as to realize the simulated window effect and improve the user's experience of being close to nature. The light emitting plate 13 can be press-fitted and fixed with the Rayleigh scattering plate 20 , and a white coating can be provided on the inner side of the light emitting plate 13 , and the effect of simulating light from a skylight can be realized by the white coating.

Specifically, in this embodiment, the second installation port 122 is provided with a support table 123 and a first clamping structure 124 , the support table 123 is located on the side of the first clamping structure 124 close to the first installation port 121 , and the support table 123 Used to support the Rayleigh scattering plate 20 . The light emitting plate 13 is provided with a second clamping structure 131 which is adapted to the first clamping structure 124 , so that the light emitting plate 13 can be installed on the light emitting cover 12 through the cooperation of the first clamping structure 124 and the second clamping structure 131 . superior. With such a structural arrangement, the installation stability of the Rayleigh diffusion plate 20 can be achieved, and the assembly can be facilitated at the same time.

In order to improve the stability of the overall structure of the lighting fixture, the housing assembly 10 in this embodiment further includes a reinforcing rib 14 . A reinforcing rib 14 may be provided on the base 11 ; or, a reinforcing rib 14 may be provided on the light-emitting cover 12 ; or, a reinforcing rib 14 may be provided on both the base 11 and the light-emitting cover 12 . Preferably, in this embodiment, reinforcing ribs 14 are provided on both the base 11 and the light-emitting cover 12 .

The base 11 is also provided with a mounting hole, so that the wire rope can be passed through the mounting hole for easy installation and fixation.

As shown in FIG. 11, a rectangular triangular coordinate system (X-axis, Y-axis, and Z-axis) is established in the drawing. The distance between the axis of the total reflection lens 32 of the light emitting component 30 and the light shielding portion of the light emitting component 30 is d ₁ , and the distance between the total reflection lens 32 of the light emitting component 30 and the light shielding portion of another adjacent light emitting component 30 is d ₂ , d ₁ ≥ d ₂ , so as to effectively block and absorb large-angle light.

In this embodiment, during installation, the first installation port 121 is used to install on the wall, and the installation cross-sectional area of the first installation port 121 is larger than the installation cross-sectional area of the second installation port 122, which can facilitate the improvement of the stability of the installation , to avoid the situation where the center of gravity is prone to shift. The light emitting cover 12 includes a first side plate 125 , a second side plate 126 , a third side plate 127 and a fourth side plate 128 which are connected end to end in sequence. The first side plate 125 , the second side plate 126 and the third side plate 127 are all Extending in the vertical direction, at least a part of the fourth side plate 128 is disposed at a predetermined angle with the vertical plane. Specifically, at least a part of the fourth side plate 128 in this embodiment is arranged in parallel with the first shading plate. By adopting such a structural arrangement, the light-exiting cover 12 can be adapted to the internal structural arrangement, and the structural shape and layout can be optimized. Specifically, in this embodiment, the first side plate 125 and the third side plate 127 are disposed opposite to each other, and the first side plate 125 and the third side plate 127 may both have trapezoidal plate structures.

Taking the plane where the Rayleigh scattering plate 20 in this embodiment is located as the projection surface, the projection of the light-emitting array on the projection plane may partially fall on the plate surface of the Rayleigh scattering plate 20 and partially fall on the surface of the Rayleigh scattering plate 20 . outside the board. In addition, the Rayleigh scattering plate 20 involved in this embodiment may be made of plastic or glass, and the plastic or glass is doped with nano-scattering particles or a Rayleigh scattering coating.

Specifically, the light-emitting cover 12 in this embodiment can be made by 3D printing. Due to the size limitation, the overall production exceeds the production range of the printer. Therefore, the light-emitting cover 12 can be disassembled into two parts, and then the two parts are overlapped. assembled. Due to the weak strength of the 3D-printed photosensitive resin material, in order to improve the overall structural strength of the device, screw holes are reserved on the surface to facilitate the installation of reinforcing structures on the screw holes. In this embodiment, a triangular rib is also provided on the side of the light emitting cover 12 close to the light emitting plate 13 to further improve the strength of the structure.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: simulating the light irradiation effect of the blue sky under natural conditions, and improving the user experience.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of this application, it should be understood that the orientations indicated by the orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and these orientations do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood to limit the scope of protection of this application.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. A lighting fixture, comprising:

a housing assembly (10);

a Rayleigh scattering plate (20) disposed on the housing assembly (10);

a light emitting module (30), wherein the light emitting module (30) is arranged opposite to the rayleigh scattering plate (20), the light emitting module (30) comprises a light emitting part (31) and a total reflection lens (32) for reducing an exit angle of a light beam emitted by the light emitting part (31), the light emitting part (31) is arranged obliquely relative to the rayleigh scattering plate (20), and the total reflection lens (32) is arranged at the light emitting part (31);

and a first light shielding section (40) provided between the Rayleigh scattering plate (20) and the light emitting module (30).

2. A light fixture as claimed in claim 1, characterized in that said housing assembly (10) comprises:

a base (11);

go out light cover (12), it sets up to go out light cover (12) on base (11), it has relative first installing port (121) and second installing port (122) that set up to go out light cover (12), base (11) set up first installing port (121) department, rayleigh scattering board (20) set up second installing port (122) department.

3. A lighting fixture as recited in claim 2, wherein said base (11) comprises:

a base plate (111);

the installation part (112) is arranged on the bottom plate (111), the installation part (112) protrudes out of the bottom plate (111), the installation surface of the installation part (112) is obliquely arranged relative to the Rayleigh scattering plate (20), and the light-emitting component (30) is arranged on the installation surface of the installation part (112).

4. A lighting fixture as recited in claim 3, wherein said mounting portion (112) is plural, and said mounting portions (112) are arranged on said base plate (111) at intervals along a predetermined direction; light emitting component (30) are a plurality of, and are a plurality of light emitting component (30) and a plurality of installation department (112) one-to-one sets up, each light emitting component (30) set up corresponding on installation department (112).

5. A light fixture as recited in claim 3, wherein said first shade portion (40) is disposed over at least a portion of said light emitting assembly (30), a shade surface of said first shade portion (40) being disposed perpendicular to a mounting surface of said mounting portion (112).

6. The lighting fixture according to claim 2, wherein the light emitting assembly (30) is a plurality of light emitting assemblies (30), the plurality of light emitting assemblies (30) are spaced apart along a predetermined direction to form a light emitting array, the light emitting array has a light emitting side and a light shielding side which are opposite to each other, the light emitting side is spaced apart from the sidewall of the light outgoing cover (12) to form an avoiding section, so as to prevent light emitted from the light emitting side from irradiating the sidewall of the light outgoing cover (12) through the avoiding section.

7. A lighting fixture as recited in claim 6, further comprising:

and the second shading part is arranged in the avoiding section and is positioned at the light-emitting side so as to shade the light emitted by the light-emitting side through the second shading part.

8. A light fixture as recited in claim 2, wherein said housing assembly (10) further comprises:

the light emitting plate (13) is arranged on the light emitting cover (12), the light emitting plate (13) is located at the second mounting opening (122), and the light emitting plate (13) is located on one side, far away from the base (11), of the Rayleigh scattering plate (20) so that light transmitted by the Rayleigh scattering plate (20) is emitted out through the light emitting plate (13).

9. A lighting fixture as recited in claim 8, wherein a support platform (123) and a first clamping structure (124) are disposed at the second mounting opening (122), the support platform (123) is located at a side of the first clamping structure (124) close to the first mounting opening (121), and the support platform (123) is configured to support the Rayleigh scattering plate (20); the light emitting plate (13) is provided with a second clamping structure (131) matched with the first clamping structure (124), so that the light emitting plate (13) is installed on the light emitting cover (12) through the matching of the first clamping structure (124) and the second clamping structure (131).

10. A light fixture as recited in claim 2, wherein said housing assembly (10) further comprises a stiffener (14);

the base (11) is provided with the reinforcing ribs (14); and/or the presence of a gas in the gas,

the light outlet cover (12) is provided with the reinforcing ribs (14).

11. The lighting fixture according to claim 2, wherein the mounting cross-sectional area of the first mounting opening (121) is larger than that of the second mounting opening (122), the light outlet cover (12) comprises a first side plate (125), a second side plate (126), a third side plate (127) and a fourth side plate (128) which are sequentially connected end to end, the first side plate (125), the second side plate (126) and the third side plate (127) all extend along a vertical direction, and at least part of the fourth side plate (128) is arranged at a predetermined angle with the vertical plane.

Images