CN218934284U

CN218934284U - Take light screen groove structure of LED lamp and contain wind-proof rolling slats of this structure

Info

Publication number: CN218934284U
Application number: CN202123455303.7U
Authority: CN
Inventors: 陈洁慧
Original assignee: Chengbao Curtain Alliance Guangdong Sunshade Technology Co ltd
Current assignee: Chengbao Curtain Alliance Guangdong Sunshade Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-04-28
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to a shading groove structure with an LED lamp and a windproof roller shutter comprising the same, wherein the shading groove structure comprises a main guide rail plate, an auxiliary guide rail plate and an LED lamp assembly, a first clamping groove extending along the up-down direction is formed in one side of the main guide rail plate, a clamping seat extending along the up-down direction is formed in one side of the auxiliary guide rail plate, the auxiliary guide rail plate is clamped with the clamping seat through the first clamping groove and is arranged on the main guide rail plate so as to enclose a fabric guide groove for installing shading fabric, and the clamping seat is positioned at the outer side of the fabric guide groove; the cassette is hollow structure, and LED lamp subassembly is installed in the cassette. The utility model effectively solves the problem that the experience of a user is affected due to insufficient light, and the lamp strip has a simple and attractive mounting structure and is convenient to operate and maintain. Thereby saving the production cost.

Description

Take light screen groove structure of LED lamp and contain wind-proof rolling slats of this structure

Technical Field

The utility model relates to the field of wind-proof roller blinds, in particular to a light shading groove structure with an LED lamp and a wind-proof roller blind comprising the same.

Background

Along with development and maturity of wind-proof rolling curtain technology, wind-proof rolling curtains are used in more occasions, the main structural principle of the wind-proof rolling curtains is very similar to that of indoor window decoration rolling curtains, but the wind-proof rolling curtains are formed by effectively integrating curtain cloth with each accessory through special accessory construction and treatment technology, fabrics are wound in a cover box, and two sides of the wind-proof rolling curtains move up and down in a light shielding groove under the driving of a motor and the balance weight of a lower rail in the cover box, so that the wind-proof rolling curtains have wind-proof capability.

However, when the external environment is insufficient in the daytime, if no additional lighting tool is arranged in the room, the work and life cannot be performed, and the use feeling of a user is affected; in a dark environment, the outdoor environment cannot be observed due to the shielding of the windproof roller shutter fabric, so that the function of knowing the outdoor environment in real time is not realized, and the appearance of a user is influenced; at present, the wind-proof rolling curtain with the lamp on the market has very complex structure and higher production cost.

Disclosure of Invention

Aiming at the existing problems, the utility model provides the light shading groove structure with the LED lamp and the windproof roller shutter with the structure, which effectively solve the problem that the experience of a user is affected due to insufficient light, and the lamp belt is simple and attractive in installation structure and convenient to operate and maintain. Thereby saving the production cost.

The technical scheme of the utility model is realized as follows:

the shading groove structure with the LED lamps comprises a main guide rail plate, an auxiliary guide rail plate and an LED lamp assembly, wherein a first clamping groove extending along the up-down direction is formed in one side of the main guide rail plate, a clamping seat extending along the up-down direction is formed in one side of the auxiliary guide rail plate, the auxiliary guide rail plate is mounted on the main guide rail plate in a clamping manner with the clamping seat through the first clamping groove so as to enclose a fabric guide groove for mounting shading fabrics, and the clamping seat is positioned on the outer side of the fabric guide groove; the clamping seat is of a hollow structure, and the LED lamp assembly is installed in the clamping seat.

Preferably, the clamping seat comprises a second clamping groove and a lampshade, clamping hooks are arranged on two sides of the lampshade, hook grooves are arranged on two sides of the inner wall of the second clamping groove, and the lampshade is clamped with the hook grooves through the clamping hooks so as to be arranged on the second clamping groove; the LED lamp assembly is located between the second clamping groove and the lampshade.

Preferably, the LED lamp assembly comprises an LED lamp strip and a lamp holder, wherein protrusions are arranged on two sides of the bottom of the second clamping groove, grooves are arranged on two sides of the lamp holder, and the protrusions are clamped with the grooves so that the lamp holder is arranged above the bottom of the second clamping groove; the LED lamp strip is arranged on the lamp holder.

Preferably, a fabric sliding groove is formed in the fabric guide groove, a zipper is arranged on one side of the shading fabric, and the shading fabric is slidably arranged in the fabric sliding groove in a penetrating mode through the zipper.

Preferably, two sides of the fabric guiding groove are symmetrically provided with structures, wherein one of the structures is located on the inner side wall of the main guide rail plate, the other structure is located on the inner side wall of the auxiliary guide rail plate, and a channel gap for the passage of the shading fabric is formed between the structures.

Preferably, the fabric straightening structure comprises a straightening strip and a containing frame, wherein a sliding strip is arranged on the inner wall of the containing frame; a slide rail is arranged on the straightening strip; the straightening strip is in sliding fit with the sliding rail through the sliding strip so as to be installed in the accommodating frame.

Preferably, a distance H1 from one side edge of the sliding rail to the first side wall of the straightening strip is not equal to a distance H2 from the other side edge of the sliding rail to the second side wall of the straightening strip.

Preferably, the main guide rail plate and the auxiliary guide rail plate are all aluminum alloy sections.

On the other hand, the utility model also discloses a windproof rolling shutter, which comprises a shading fabric, a machine top cover, a lower rail and two shading groove structures, wherein the two shading groove structures are respectively connected with two sides of the bottom of the machine top cover, two ends of the lower rail are in sliding connection with the shading groove structures through lower rail end covers, the starting end of the shading fabric is positioned in the machine top cover, two sides of the shading fabric are in sliding penetrating arrangement with the shading groove structures, and the tail ends of the shading fabric are connected with the lower rail.

Compared with the prior art, the utility model has the following advantages:

the light shading groove structure with the LED lamp can achieve the purpose of installing the main guide rail plate and the auxiliary guide rail plate only by matching the first clamping groove with the clamping seat, and the influence on the beauty caused by the installation of screws is avoided, so that the installation precision and the beauty of the light shading groove structure are improved; the LED lamp assembly is added to play a role in illumination, so that the use experience of a user is improved; the LED lamp assembly is installed in the clamping seat and is clamped with the clamping seat only through the first clamping groove, so that the LED lamp assembly is fixed on the main guide rail plate, the structure is simple, the installation is convenient and fast, the precision is high, the production cost is saved, and the market competitiveness is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a cross-sectional view of a wind-resistant roller shade channel structure of the present utility model;

FIG. 2 is a cross-sectional exploded view of the structure of the wind-resistant roller shutter blind slot of the present utility model;

FIG. 3 is a schematic view of a side cooking sequence structure in the structure of the wind-proof roller shutter blind trough of the utility model;

FIG. 4 is an isometric exploded view of the structure of the shade channel of the wind-resistant roller shutter of the present utility model;

FIG. 5 is a schematic view of a windbreak roller blind of the present utility model;

the attached drawings are identified:

1. a first clamping groove; 11. a convex rail; 2. a clamping seat; 21. a groove rail; 22. a second clamping groove; 221. a hook groove; 222. a protrusion; 23. a lamp shade; 231. a clamping hook; 3. an LED lamp assembly; 31. an LED lamp strip; 32. a lamp holder; 321. a groove; 4. a fabric guide groove; 41. a fabric sliding groove; 5. shading fabric; 6. a zipper; 7. a fabric straightening structure; 71. a channel gap; 72. straightening the strips; 721. a slide rail; 73. a housing frame; 731. a slide bar; 8. a zipper guide assembly; 10. a main rail plate; 20. an auxiliary guide rail plate; 30. a top cover; 40. a lower rail; 50. a lower rail end cap.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, the utility model comprises a main guide rail plate 10, an auxiliary guide rail plate 20 and an LED lamp assembly 3, wherein a first clamping groove 1 with a shading groove structure of an LED lamp extending along the up-down direction is arranged on one side of the main guide rail plate 10, a clamping seat 2 extending along the up-down direction is arranged on one side of the auxiliary guide rail plate 20, the auxiliary guide rail plate 20 is clamped with the clamping seat 2 through the first clamping groove 1 and is arranged on the main guide rail plate 10 so as to enclose a fabric guide groove 4 for installing shading fabric 5, and the clamping seat 2 is positioned on the outer side of the fabric guide groove 4; the clamping seat 2 is of a hollow structure, and the LED lamp assembly 3 is arranged in the clamping seat 2.

Specifically, the inner side wall of the first clamping groove 1 is provided with a convex rail 11, the back of the clamping seat 2 is provided with a concave rail 21, and the concave rail 21 is clamped with the convex rail 11 to ensure that the first clamping groove 1 is clamped with the clamping seat 2, so that the auxiliary guide rail plate 20 is arranged on the main guide rail plate 10; the main guide rail plate 10 and the auxiliary guide rail plate 20 can be installed only by matching the concave rail 21 with the convex rail 11, and the installation and fixation of connecting pieces such as screws are not needed, so that the installation precision and the attractiveness of the light shielding groove structure are improved.

When the auxiliary guide rail plate 20 is arranged on the main guide rail plate 10, the other side wall of the first clamping groove 1 clamped with the clamping seat 2 forms a fabric guide groove 4, namely, according to the direction that the light shielding groove structure is combined with other accessories to form a windproof rolling screen, the fabric guide groove 4 is positioned at the inner side of the clamping seat 2, and the notch of the fabric guide groove 4 faces inwards; the fabric guide groove 4 is used for installing the shading fabric 5, one side of the shading fabric 5 is fixedly installed in the fabric guide groove 4, and the other side of the shading fabric 5 penetrates out of a notch of the fabric guide groove 4, so that one side of the shading fabric 5 is limited in the fabric guide groove 4 and can only move up and down along the fabric guide groove 4.

The clamping seat 2 at one side of the auxiliary guide rail plate 20 is of a hollow structure, and the hollow structure provides an installation space for the LED lamp assembly 3; the LED lamp assembly 3 is arranged in the card seat 2, so that when the external environment is insufficient, the LED lamp assembly can play a role in illumination, and the use experience of a user is improved; under the shielding of the clamping seat 2, the direct light rays to eyes are avoided, the invasion of dust can be prevented, and the service life of the LED lamp is prolonged; and only need cooperate with first draw-in groove 1 through cassette 2 just can realize installing main LED lamp subassembly 3 in the light screen groove structure, its simple structure, it is convenient to install to practice thrift manufacturing cost, improved the installation accuracy and the aesthetic property of this light screen groove structure, and then improved market competition.

The further improvement is that the clamping seat 2 comprises a second clamping groove 22 and a lamp shade 23, wherein clamping hooks 231 are arranged on two sides of the lamp shade 23, a hooking groove 221 is arranged on two sides of the inner wall of the second clamping groove 22, and the lamp shade 23 is clamped with the hooking groove 221 through the clamping hooks 231 so as to be installed on the second clamping groove 22, so that a hollow structure is enclosed; the LED lamp assembly 3 is positioned in a hollow structure of the second clamping groove 22 and the lampshade 23, and the hollow structure provides installation and protection space for the LED lamp assembly 3; direct light to eyes can be avoided through the lampshade 23, and dizzy is caused; the invasion of dust can be prevented, and the service life of the LED lamp assembly 3 is prolonged; the light can be more gentle and uniform to be dispersed to the space, so that enjoyment is brought to people; the lampshade 23 is only matched with the hook groove 221 through the hook 231 so as to be installed on the second clamping groove 22, so that the structure is simple, the installation is convenient and fast, and the installation precision and the aesthetic property of the structure of the shading groove are improved; and when the LED lamp assembly 3 needs to be maintained, the lamp shade 23 can be disassembled by matching the clamping hooks 231 with the hook grooves 221, so that the LED lamp assembly 3 can be maintained.

The further improvement is that the LED lamp assembly 3 comprises an LED lamp strip 31 and a lamp holder 32, wherein the two sides of the bottom of the second clamping groove 22 are provided with bulges 222, the two sides of the lamp holder 32 are provided with grooves 321, and the bulges 222 are clamped with the grooves 321 so that the lamp holder 32 is arranged above the bottom of the second clamping groove 22; the structure is simple, and the installation is convenient; the LED lamp strip 31 is arranged on the lamp holder 32, and the LED lamp strip 31 is fixed through the lamp holder 32.

The improvement is that a fabric sliding groove 41 is arranged in the fabric guide groove 4, a zipper 6 is arranged on one side of the shading fabric 5, and the shading fabric 5 is arranged in the fabric sliding groove 41 in a sliding way through the zipper 6.

Specifically, the fabric guide groove 4 is provided with a zipper guide assembly 8, the zipper guide assembly 8 is provided with a fabric sliding groove 41, one side of the shading fabric 5 is provided with a zipper 6, and the zipper 6 is slidably arranged in the fabric sliding groove 41 in a penetrating manner, so that the shading fabric 5 is slidably arranged in the fabric sliding groove 41 through the zipper 6, so that one side of the shading fabric 5 is limited to the inside of the fabric sliding groove 41 and can only move up and down along the fabric sliding groove 41.

The improvement lies in that two fabric straightening structures 7 are symmetrically arranged at the notch of the fabric guide groove 4, one fabric straightening structure 7 is positioned on the inner side wall of the main guide rail plate 10, the other fabric straightening structure 7 is positioned on the inner side wall of the auxiliary guide rail plate 20, and a channel gap 71 for the passage of the shading fabric 5 is formed between the two fabric straightening structures 7.

In the vertical sliding process of the zipper 6, the side edges of the shading fabric 5 are easy to be stressed unevenly, so that the shading fabric 5 is easy to generate wrinkles or uneven at the positions close to two side frames, in the embodiment, two fabric straightening structures 7 are symmetrically arranged at the notch of the fabric guide groove 4, one fabric straightening structure 7 is positioned on the inner side wall of the main guide rail plate 10, the other fabric straightening structure 7 is positioned on the inner side wall of the auxiliary guide rail plate 20, one side of the shading fabric 5 penetrates out from a channel gap 71 between the two side straightening structures 7, so that under the limitation of the channel gap 71 between the two side straightening structures 7 which are symmetrically distributed, the stress of the shading fabric 5 is more balanced when the shading fabric slides up and down along with the zipper 6, and the shaking resistance of the fabric is increased when in wind blowing, so that the wrinkles or uneven phenomenon is difficult to generate on the shading fabric 5, and the wind pressure resistance and the wrinkle resistance of the shading fabric 5 are improved.

The further improvement is that the fabric straightening structure 7 comprises a straightening strip 72 and a containing frame 73, wherein a sliding strip 731 is arranged on the inner wall of the containing frame 73; the straightening strip 72 is provided with a sliding rail 721; the straightening out bar 72 is slidably fitted into the accommodating frame 73 by the slide bar 731 and the slide rail 721.

In this embodiment, the straightening strip 72 is i-shaped, and the sliding rail 721 is a recess of the straightening strip 72; the straightening out strip 72 is slidably matched with the sliding rail 721 through the sliding strip 731 to be installed in the accommodating frame 73, so that the installation is flexible and convenient, and the straightening out strip 72 can be detached from the accommodating frame 73 or the straightening out strip 72 can be installed in the accommodating frame 73 at any time according to requirements.

A further improvement is that, as shown in fig. 3, the distance H1 from one side of the slide 721 to the first side wall of the straightening strip 72 is not equal to the distance H2 from the other side of the slide 721 to the second side wall of the straightening strip 72.

In this embodiment, the straightening strip 72 is i-shaped, since the distance H1 from one side of the sliding rail 721 to the first side wall of the straightening strip 72 is not equal to the distance H2 from the other side of the sliding rail 721 to the second side wall of the straightening strip 72, that is, in the straightening strip 72, the thickness of the linear structure on the upper side of the sliding rail 721 is not equal to the thickness of the linear structure on the lower side of the sliding rail 721, and the straightening strip 72 is slidably matched with the sliding rail 721 through the sliding strip 731 and the sliding rail 721 to be installed in the accommodating frame 73, the straightening strip 72 can be inserted into the accommodating frame 73 in the forward direction and be inserted into the accommodating frame 73 in the reverse direction, and the distance between the two straightening strips 72 is inconsistent, that is, the channel gap 71 for the light-shielding fabric 5 to pass through is inconsistent, so that the light-shielding fabric 5 can be inserted into the accommodating frame 73 in the forward direction or the reverse direction through the straightening strip 72, so as to meet the requirements of different users on the light-shielding fabrics 5 with different thicknesses, and also prevent the channel gap 71 from being excessively small and scraping to the light-shielding fabric 5, or the channel gap 71 from being excessively large, and the light-shielding fabric 5 being excessively large in swing.

A further improvement is that the main guide rail plate 10 and the auxiliary guide rail plate 20 are all aluminum alloy sections. The main guide rail plate 10 and the auxiliary guide rail plate 20 which are made of aluminum alloy materials are light and environment-friendly, have good wear resistance, prolong the service life of the light shading groove structure, have good polishing property, and present flat and bright surfaces after polishing so as to increase the attractiveness and improve the use experience of users.

The utility model also provides a windproof rolling shutter, as shown in fig. 5, which comprises a shading fabric 5, a top cover 30, a lower rail 40 and two shading groove structures, wherein the two shading groove structures are respectively connected with two sides of the bottom of the top cover 30, two ends of the lower rail 40 are in sliding connection with the shading groove structures through a lower rail end cover 50, the starting end of the shading fabric 5 is positioned in the top cover 30, two sides of the shading fabric are in sliding penetrating arrangement, and the tail end of the shading fabric is connected with the lower rail 40.

Specifically, two light shading groove structures are respectively connected with two sides of the bottom of the top cover 30, two ends of the lower rail 40 are connected with the light shading groove structures through the lower rail end covers 50 and can move back and forth in the light shading groove structures, the starting end of the light shading fabric 5 is rotatably installed in the top cover 30 through a roller tube, two sides of the light shading fabric 5 penetrate through the light shading groove structures and are driven by a motor located in the roller tube, two sides of the light shading fabric 5 can move back and forth in the light shading groove structures, the tail end of the light shading fabric 5 is connected with the lower rail 40, and the flatness of the light shading fabric 5 in the sliding process can be guaranteed under the gravity action of the lower rail 40.

In summary, the light shielding groove structure with the LED lamp can achieve the purpose of installing the main guide rail plate and the auxiliary guide rail plate only by matching the first clamping groove with the clamping seat, and the influence on the appearance caused by installation by using screws is avoided, so that the installation precision and the appearance of the light shielding groove structure are improved; the LED lamp assembly is added to play a role in illumination, so that the use experience of a user is improved; the LED lamp assembly is arranged in the clamping seat, so that direct light rays are prevented from irradiating eyes, invasion of dust can be prevented, and the service life of the LED lamp is prolonged; the LED lamp assembly is fixed on the main guide rail plate only by clamping the first clamping groove and the clamping seat, so that the structure is simple, the installation is convenient and fast, the precision is high, the production cost is saved, and the market competitiveness is improved; one side of the shading fabric is limited to the fabric sliding groove and can only move up and down along the fabric sliding groove; the shading fabric is not easy to wrinkle or rugged, and the wind pressure resistance and the wrinkle resistance of the shading fabric are improved; the straightening strips are suitable for shading fabrics with different thicknesses, and the requirements of different users on the shading fabrics with different thicknesses are met; the aluminum alloy section prolongs the service life of the light shielding groove structure, increases the beauty and improves the use experience of users.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A shading groove structure with an LED lamp is characterized in that,

the LED light guide plate comprises a main guide rail plate (10), an auxiliary guide rail plate (20) and an LED light assembly (3), wherein a first clamping groove (1) extending along the up-down direction is formed in one side of the main guide rail plate (10), a clamping seat (2) extending along the up-down direction is formed in one side of the auxiliary guide rail plate (20), the auxiliary guide rail plate (20) is mounted on the main guide rail plate (10) through the first clamping groove (1) and the clamping seat (2) in a mutually clamping manner so as to enclose a fabric guide groove (4) for mounting a shading fabric (5), and the clamping seat (2) is located on the outer side of the fabric guide groove (4); the clamping seat (2) is of a hollow structure, and the LED lamp assembly (3) is arranged in the clamping seat (2).

2. The LED lamp shade slot structure of claim 1, wherein,

the clamping seat (2) comprises a second clamping groove (22) and a lamp shade (23), clamping hooks (231) are arranged on two sides of the lamp shade (23), a hook groove (221) is arranged on two sides of the inner wall of the second clamping groove (22), and the lamp shade (23) is clamped with the hook groove (221) through the clamping hooks (231) so as to be installed on the second clamping groove (22); the LED lamp assembly (3) is located between the second clamping groove (22) and the lampshade (23).

3. The LED lamp shade slot structure of claim 2, wherein,

the LED lamp assembly (3) comprises an LED lamp strip (31) and a lamp holder (32), wherein protrusions (222) are arranged on two sides of the bottom of the second clamping groove (22), grooves (321) are arranged on two sides of the lamp holder (32), and the protrusions (222) are clamped with the grooves (321) so that the lamp holder (32) is arranged above the bottom of the second clamping groove (22); the LED lamp strip (31) is arranged on the lamp holder (32).

4. The LED lamp shade slot structure of claim 1, wherein,

the fabric guide groove (4) is internally provided with a fabric sliding groove (41), one side of the shading fabric (5) is provided with a zipper (6), and the shading fabric (5) is slidably penetrated in the fabric sliding groove (41) through the zipper (6).

5. The LED lamp shade slot structure of claim 4, wherein,

two fabric straightening structures (7) are symmetrically arranged at the notch of the fabric guide groove (4), one fabric straightening structure (7) is positioned on the inner side wall of the main guide rail plate (10), the other fabric straightening structure (7) is positioned on the inner side wall of the auxiliary guide rail plate (20), and a channel gap (71) for the passage of the shading fabric (5) is formed between the two fabric straightening structures (7).

6. The LED lamp shade slot structure of claim 5, wherein,

the fabric straightening structure (7) comprises a straightening strip (72) and a containing frame (73), wherein a sliding strip (731) is arranged on the inner wall of the containing frame (73); a slide rail (721) is arranged on the straightening strip (72); the straightening out strip (72) is slidably matched with the sliding strip (731) and the sliding rail (721) to be installed in the accommodating frame (73).

7. The LED lamp shade slot structure of claim 6, wherein,

the distance H1 from one side edge of the sliding rail (721) to the first side wall of the straightening strip (72) is not equal to the distance H2 from the other side edge of the sliding rail (721) to the second side wall of the straightening strip (72).

8. The LED lamp shade slot structure of claim 1, wherein,

the main guide rail plate (10) and the auxiliary guide rail plate (20) are all aluminum alloy sections.

9. The utility model provides a prevent wind roller shutter which characterized in that, includes shading surface fabric (5), machine top cover (30), lower rail (40) and two the shading groove structure of any one of claims 1-8, two the shading groove structure respectively with the bottom both sides of machine top cover (30) are connected, the both ends of lower rail (40) pass through lower rail end cover (50) with shading groove structure sliding connection, the starting end of shading surface fabric (5) is located in machine top cover (30), both sides slip wears to locate in the shading groove structure, the end with lower rail (40) are connected.