CN110792382A

CN110792382A - Electric sunshade

Info

Publication number: CN110792382A
Application number: CN201911115298.XA
Authority: CN
Inventors: 王志芳; 吴金福; 冯泽峰
Original assignee: Guangzhou Compton Zhigao Building Material Co Ltd
Current assignee: Guangzhou Compton Zhigao Building Material Co Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-02-14

Abstract

The invention provides an electric sunshade which comprises a lifting driving system, a rotary driving system, a top beam, a bottom beam, a guide rail, a lifting beam and a sunshade unit, wherein the lifting driving system is arranged on the top beam; the guide rails are vertically arranged on two sides, the top beam is connected to the top between the guide rails, and the bottom beam is connected to the bottom between the guide rails; the sun-shading unit comprises a lower sun-shading sheet, an upper sun-shading sheet, a lower half shaft and an upper half shaft; the upper half shaft is connected with the lower half shaft in a sliding way and can transmit torque, and the lower half shaft is connected with the rotary driving system in a transmission way so that the upper half shaft and the lower half shaft can rotate along the axial direction; the bottom end of the lower sunshade piece of the hollow structure is fixedly connected with the lower half shaft; the upper sunshade sheet consists of a plurality of unit sheets and a telescopic mechanism, the unit sheets are arranged in an enclosing mode, the shape of the unit sheets corresponds to that of the lower sunshade sheet, and the unit sheets are in transmission connection with the upper half shaft through the telescopic mechanism, so that the outer size of the upper sunshade sheet can be contracted to be smaller than that of the inner wall of the lower sunshade sheet. The invention can realize the full opening of the sun-shading unit without shading the sight and can also realize the rotation of the sun-shading sheet to freely adjust the transmittance.

Description

Electric sunshade

Technical Field

The invention relates to the field of building materials, in particular to an electric sunshade.

Background

The sunshade product can be used as a curtain to shade sunlight and can also be closed to prevent wind. Current motorized shades have only two forms: the sun-shading sheet can slide up and down to open and close or rotate to open and close. The sunshade opened and closed by sliding up and down is a descending shading, and if a half shading is realized, only the upper half shading and the lower half shading can be realized. The sunshade of sunshade piece rotatory switching then can't accomplish to open completely, even rotate sunshade piece to perpendicular with the window, sunshade piece also always can disturb the sight.

It is obvious that the prior art has certain defects.

Disclosure of Invention

The invention aims to provide an electric sunshade, which can realize downward folding of a sunshade unit without shielding sight and can realize free adjustment of transmittance through rotation of the sunshade unit.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric sunshade comprises a lifting driving system, a rotary driving system, a top beam, a bottom beam, a guide rail, a lifting beam and a sunshade unit; the guide rails are vertically arranged on two sides, the top beam is connected to the top between the guide rails, and the bottom beam is connected to the bottom between the guide rails;

the sun-shading unit comprises a lower sun-shading sheet, an upper sun-shading sheet, a lower half shaft and an upper half shaft; the upper half shaft is connected with the lower half shaft in a sliding way and can transmit torque, the top end of the upper half shaft is connected with the lifting beam in a rotating way, two ends of the lifting beam are connected with the guide rail in a sliding way and are simultaneously connected with the lifting driving system in a transmission way, so that the lifting beam can slide up and down, and the lower half shaft is connected with the rotating driving system in a transmission way so that the upper half shaft and the lower half shaft can rotate along the axial direction; the bottom end of the lower sunshade piece of the hollow structure is fixedly connected with the lower half shaft; the upper sunshade sheet consists of a plurality of unit sheets and a telescopic mechanism, the unit sheets are arranged in an enclosing mode, the shape of the unit sheets corresponds to that of the lower sunshade sheet, and the unit sheets are in transmission connection with the upper half shaft through the telescopic mechanism, so that the outer size of the upper sunshade sheet can be contracted to be smaller than that of the inner wall of the lower sunshade sheet.

Furthermore, four unit pieces are arranged on each sun shading unit, are respectively arranged around and are divided into two first unit pieces and two second unit pieces, and the two first unit pieces and the two second unit pieces are oppositely arranged; the two ends of the first unit piece are provided with first connecting parts, the two ends of the second unit piece are provided with second connecting parts matched with the first connecting parts, so that the first connecting parts and the second connecting parts are spliced together when the first unit piece and the second unit piece are opened and extended, and the first connecting parts and the second connecting parts are separated from each other when the first unit piece and the second unit piece are contracted.

Furthermore, the telescopic mechanism comprises a fixed support, a first swing arm, a second swing arm, a first spring, a second spring, a first connecting member, a second connecting member and an expansion mechanism; the two fixed brackets are fixedly and parallelly arranged along the upper half shaft; the first swing arm and the second swing arm are arranged corresponding to the first unit chip and the second unit chip respectively; one end of the first swing arm is hinged with the fixed support, and the other end of the first swing arm is hinged with the first connecting component; one end of the second swing arm is hinged with the fixed support, and the other end of the second swing arm is hinged with the second connecting component; the first swing arm and the first connecting member, and the second swing arm and the second connecting member respectively form a parallelogram mechanism, the inner side of the first unit piece is fixedly connected with the first connecting member, and the inner side of the second unit piece is fixedly connected with the second connecting member; the first spring is connected between the upper half shaft and the first connecting member, and the second spring is connected between the upper half shaft and the second connecting member, so that the first unit piece and the second unit piece elastically contract; the first connecting member is connected with the lower half shaft or the lower sunshade plate, and the second connecting member is connected with the lower half shaft or the lower sunshade plate through the expanding mechanism, so that the expanding mechanism drives the first unit piece and the second unit piece to be opened when the upper half shaft is stretched to the top.

Furthermore, the expansion mechanism comprises a first expansion arm, a second expansion arm, a first sliding block, a second sliding block and a limiting block; the upper end of the first expansion arm is hinged with the first connecting member, the lower end of the first expansion arm is hinged with the first sliding block, and the first sliding block is connected with the lower half shaft in a sliding manner; the upper end of the second expansion arm is hinged with the second connecting member, the lower end of the second expansion arm is hinged with the second sliding block, and the second sliding block is in sliding connection with the lower half shaft; the top end of the lower half shaft is fixedly provided with a limiting block, so that the first unit piece and the second unit piece are pulled to be opened through the first expansion arm and the second expansion arm when the first sliding block and the second sliding block are jacked to the limiting block.

Furthermore, a first connecting groove matched with the first connecting member is formed in the inner side of the first unit piece, and a second connecting groove matched with the second connecting member is formed in the inner side of the second unit piece; the first unit piece is sleeved on the first connecting component through the first connecting groove; the second unit piece is sleeved on the second connecting component through the second connecting groove.

Further, the lower sun-shading sheet comprises a sun-shading sheet body in a hollow cylindrical shape and a lower end socket fixedly connected to the bottom of the sun-shading sheet body, and the lower end socket is fixedly connected with the lower half shaft.

Furthermore, the top of the lower sunshade piece is fixedly provided with a middle sealing head, the middle sealing head is in a hollow ring shape matched with the lower sunshade piece and the upper sunshade piece in appearance, and the top side of the middle sealing head is provided with a sleeving groove used for keeping the upper sunshade piece stably connected, so that the upper sunshade piece is embedded in the sleeving groove to keep stable after being opened.

Furthermore, a flexible upper sealing head is arranged at the top end of the upper sun-shading sheet, so that the top of the upper sun-shading sheet is closed in an opening or contraction state.

Furthermore, the lifting driving system comprises a lifting motor, a synchronous shaft, a chain wheel and a transmission chain; the lifting motor is arranged on the top beam and is in transmission connection with the synchronous shaft; an upper chain wheel and a lower chain wheel are respectively arranged along the axial direction of the guide rail, the transmission chains are wound on the chain wheels, two ends of the synchronizing shaft are respectively in transmission connection with the chain wheels at the top ends of the two guide rails, and the two transmission chains are respectively connected with two ends of the lifting beam, so that the transmission chains drive the lifting beam to slide up and down.

Further, the rotary driving system comprises a rotary motor, a driving rocker and a synchronous connecting rod; the rotating motor is arranged on the bottom beam and is in transmission connection with the driving rocker, the driving rocker is hinged with the synchronous connecting rod, and the synchronous connecting rod is connected with the lower sunshade sheet at the bottom end of each sunshade unit, so that the synchronous connecting rod can drive all the sunshade units to synchronously rotate.

The invention provides an electric sunshade which has the following advantages:

the sunshade unit can be folded downwards, so that the normal sight of a person is not influenced, the sunshade unit has a wider visual field, can extend upwards, and can be freely adjusted to rotate to control the transmittance;

after the sun-shading unit extends upwards, the upper sun-shading sheet can be stretched to be completely matched with the lower sun-shading sheet, and the joint is stable, the integrity is good, the mechanical property is excellent, and the appearance can be kept;

the lifting driving system and the rotating driving system are mutually independent and can be independently controlled, and the product has a simple integral structure and is easy to assemble.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the electric sunshade provided by the present invention.

Fig. 2 is an exploded structural view of the sunshade unit.

Fig. 3 is a sectional view of the combined structure of the upper sunshade sheet.

FIG. 4 is a schematic diagram of the operation of the upper sunshade plate in the extending process.

Fig. 5 is a schematic diagram of the first unit piece or the second unit piece being fitted with the middle cap.

Fig. 6 is a schematic structural diagram of the lifting driving system and the rotation driving system.

Description of reference numerals:

1. top beam 2, bottom beam

3. Guide rail 4, lifting beam

5. Sunshade unit 6, lower sunshade

7. Upper sunshade piece 8, lower half shaft

9. Upper half shaft 10, first die

11. Second die 12, first connecting member

13. Second connecting member 14, sunshade body

15. Lower end enclosure 16 and middle end enclosure

17. Fixed bolster 18, first swing arm

19. Second swing arm 20, first connecting groove

21. Second connecting groove 22, first connecting portion

23. Second connecting part 24 and first sliding block

25. Second slider 26, first expansion arm

27. Second expansion arm 28, elevator motor

29. Synchronizing shaft 30, sprocket

31. Transmission chain 32 and rotating electric machine

33. Drive rocker 34, synchronous link

35. Sleeve joint groove

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1 to 3, an embodiment of the present invention provides an electric sunshade, which includes a lifting driving system, a rotation driving system, a top beam 1, a bottom beam 2, a guide rail 3, a lifting beam 4, and a sunshade unit 5; the guide rails 3 are vertically arranged on two sides, the top beam 1 is connected to the top between the guide rails 3, and the bottom beam 2 is connected to the bottom between the guide rails 3;

the sun-shading unit 5 comprises a lower sun-shading sheet 6, an upper sun-shading sheet 7, a lower half shaft 8 and an upper half shaft 9; the upper half shaft 9 is connected with the lower half shaft 8 in a sliding manner and can transmit torque, the top end of the upper half shaft 9 is rotationally connected with the lifting beam 4, two ends of the lifting beam 4 are connected with the guide rail 3 in a sliding manner and are simultaneously connected with the lifting driving system in a transmission manner, so that the lifting beam 4 can slide up and down, and the lower half shaft 8 is connected with the rotating driving system in a transmission manner, so that the upper half shaft 9 and the lower half shaft 8 can rotate along the axial direction; the bottom end of the lower sunshade piece 6 with a hollow structure is fixedly connected with a lower half shaft 8; the upper sunshade sheet 7 is composed of a plurality of unit sheets and a telescopic mechanism, the unit sheets are arranged in a surrounding mode, the shape of the unit sheets corresponds to that of the lower sunshade sheet 6, and the unit sheets are in transmission connection with the upper half shaft 9 through the telescopic mechanism, so that the outer size of the upper sunshade sheet 7 can be contracted to be smaller than the inner wall of the lower sunshade sheet 6.

The invention can be applied to windows or terraces, and is mainly characterized in that the sunshade unit 5 is divided into a lower sunshade sheet 6 and an upper sunshade sheet 7, and the upper sunshade sheet 7 can be contracted and stored in the lower sunshade sheet 6, so that the sight above the window or the terraces and other areas can not be blocked completely, and people can obtain better visual field. And when the shielding is needed, the upper sunshade plate 7 can extend upwards from the inner part of the lower sunshade plate 6. Moreover, the upper sunshade sheet 7 is formed by splicing a plurality of unit sheets, has a contraction and extension state, and the size of the contraction state is smaller than the inner wall of the lower sunshade sheet 6, so that the contraction state can be completely accommodated in the lower sunshade sheet 6; when the sunshade unit is stretched, the size of the sunshade unit can be expanded to be completely matched with the lower sunshade 6 through the complete stretching of the telescopic mechanism, so that the whole sunshade unit 5 is consistent in appearance and has strong integrity.

The telescopic between the upper sunshade piece 7 and the lower sunshade piece 6 realizes the positioning through the sliding of the upper half shaft 9 and the lower half shaft 8, and simultaneously, the torque can be transmitted between the upper half shaft 9 and the lower half shaft 8, so that the rotation amplitude of the whole sunshade unit 5 can be adjusted through a rotation driving device.

With particular reference to fig. 3 to 4, for the specific structure of the upper sunshade 7, in order to implement the functions of contraction and extension, it is preferable that: four unit pieces are arranged on each sunshade unit 5, are respectively arranged around and are divided into two first unit pieces 10 and two second unit pieces 11, and the two first unit pieces 10 and the two second unit pieces 11 are oppositely arranged; the two ends of the first unit piece 10 are provided with first connecting parts 22, the two ends of the second unit piece 11 are provided with second connecting parts 23 matched with the first connecting parts 22, so that the first connecting parts 22 and the second connecting parts 23 are spliced together when the first unit piece 10 and the second unit piece 11 are opened and extended, and the first connecting parts 22 and the second connecting parts 23 are separated from each other when the first unit piece 10 and the second unit piece 11 are contracted.

The first die 10 and the second die 11 can be translated in horizontal longitudinal and lateral directions, respectively, to achieve contraction and expansion. It should be noted that, in the structure in which the first connecting portion 22 and the second connecting portion 23 are joined in the extended state, a groove-like structure that can be visually recognized may be formed, and in order to make the lower sunshade 6 and the upper sunshade 7 consistent in appearance, the lower sunshade 6 may be processed to have a corresponding structure. However, this corresponding structure does not function as a practical function for the lower sunshade 6.

More specifically, the telescopic mechanism preferably includes a fixed bracket 17, a first swing arm 18, a second swing arm 19, a first spring, a second spring, a first connecting member 12, a second connecting member 13, and an expanding mechanism; the two fixed brackets 17 are fixedly and parallelly arranged along the upper half shaft 9; the first swing arm 18 and the second swing arm 19 are arranged corresponding to the first die 10 and the second die 11, respectively; one end of the first swing arm 18 is hinged with the fixed bracket 17, and the other end is hinged with the first connecting component 12; one end of the second swing arm 19 is hinged with the fixed bracket 17, and the other end is hinged with the second connecting component 13; the first swing arm 18 and the first connecting member 12, and the second swing arm 19 and the second connecting member 13 respectively form a parallelogram mechanism, the inner side of the first unit slice 10 is fixedly connected with the first connecting member 12, and the inner side of the second unit slice 11 is fixedly connected with the second connecting member 13; a first spring is connected between the upper half shaft 9 and the first connecting member 12, and a second spring is connected between the upper half shaft 9 and the second connecting member 13, so that the first unit piece 10 and the second unit piece 11 elastically contract; the first connecting member 12 is connected with the lower half shaft 8 or the lower sunshade 6, and the second connecting member 13 is connected with the lower half shaft 8 or the lower sunshade 6 through the expanding mechanism, so that the expanding mechanism drives the first unit piece 10 and the second unit piece 11 to be opened when the upper half shaft 9 is stretched to the top.

The action tracks of the four unit slices completely depend on the action of the telescopic mechanism. The parallelogram mechanism can ensure that the first connecting member 12 and the second connecting member 13 are always kept vertical during the movement, thereby ensuring that the first unit piece 10 and the second unit piece 11 are not scattered.

Referring specifically to fig. 4, the operation of extending and unfolding the upper sunshade 7 is shown. Further, the expanding mechanism includes a first expanding arm 26, a second expanding arm 27, a first slider 24, a second slider 25, and a stopper (not shown); the upper end of the first expansion arm 26 is hinged with the first connecting component 12, the lower end is hinged with the first slide block 24, and the first slide block 24 is connected with the lower half shaft 8 in a sliding way; the upper end of the second expansion arm 27 is hinged with the second connecting component 13, the lower end is hinged with the second sliding block 25, and the second sliding block 25 is connected with the lower half shaft 8 in a sliding way; the top end of the lower half shaft 8 is fixedly provided with a limiting block, so that the first slider 24 and the second slider 25 pull the first unit piece 10 and the second unit piece 11 to open through the first expansion arm 26 and the second expansion arm 27 when pushing against the limiting block.

The specific working principle of the expansion mechanism is as follows: in the process of extending the upper sunshade 7, the four unit pieces are always kept in a contracted state under the action of the spring, and in the process, the first slide block 24 and the second slide block 25 slide upwards along the lower half shaft 8 under the upwards stretching action of the first expansion arm 26 and the second expansion arm 27. When the upper sunshade piece 7 extends to the maximum, the first slider 24 and the second slider 25 will push against the limiting block and cannot slide upwards continuously, and as long as the upper sunshade piece 7 extends upwards to the maximum, the first slider 24 and the second slider 25 will drag the first connecting member 12 and the second connecting member 13 through the first expanding arm 26 and the second expanding arm 27, respectively, so that the first unit piece 10 and the second unit piece 11 will overcome the contraction elasticity of the spring and extend outwards.

The lower half shaft 8 may be provided with corresponding tracks for the sliding of the first slider 24 and the second slider 25. The limiting blocks can be divided into four blocks corresponding to the first slider 24 and the second slider 25, or can be integrally arranged.

When the upper sunshade 7 is folded downwards, the contraction of the unit pieces, i.e. the reverse of the above-mentioned action, will not be described herein.

Each of the unit pieces, the first connecting member 12, and the second connecting member 13 is preferably formed by processing a profile, which can reduce the processing cost and difficulty. The specific connection structure is preferably as follows: a first connecting groove 20 matched with the first connecting member 12 is formed in the inner side of the first unit piece 10, and a second connecting groove 21 matched with the second connecting member 13 is formed in the inner side of the second unit piece 11; the first die 10 is sleeved on the first connecting member 12 through the first connecting slot 20; the second unit piece 11 is sleeved on the second connecting member 13 through a second connecting groove 21.

Specifically, in order to prevent the first and second unit chips 10 and 11 from falling off, the first and

second connection members

12 and 13 may be fixed to each other by screws. The position of the screw is not limited, and is generally located near the first connecting groove 20 and the second connecting groove 21.

Referring to fig. 2 in detail, preferably, the lower sunshade 6 includes a hollow cylindrical sunshade body 14, and a lower end enclosure 15 fixedly connected to the bottom of the sunshade body 14, and the lower end enclosure 15 is fixedly connected to the lower half shaft 8.

Referring to fig. 5, preferably, the top of the lower sunshade 6 is fixedly provided with a middle sealing head 16, the middle sealing head 16 is in a hollow ring shape matched with the lower sunshade 6 and the upper sunshade 7, and a sleeving groove 35 for keeping the upper sunshade 7 connected stably is arranged on the top side of the middle sealing head, so that the upper sunshade 7 is engaged in the sleeving groove 35 after being opened to keep stable.

The middle sealing head 16 can improve the connection stability of the upper sunshade sheet 7 after extending out and the lower sunshade sheet 6, so that the mechanical property of the middle sealing head is better, and the middle sealing head is firmer and firmer, thereby improving the wind-proof performance of the whole sunshade unit 5. In addition, the upper sunshade 7 can be in sliding contact with the inner wall of the middle seal 16 in a contracted state during the upward extension process, and has a stabilizing effect on the upper sunshade to a certain extent.

In order to ensure the sealing of the top of the upper sunshade 7, preferably, a flexible upper sealing head is arranged at the top end of the upper sunshade 7, so that the top of the upper sunshade 7 is closed in an opening or contraction state.

Referring to fig. 6, preferably, the lifting driving system includes a lifting motor 28, a synchronizing shaft 29, a sprocket 30, and a transmission chain 31; the lifting motor 28 is arranged on the top beam 1 and is in transmission connection with the synchronizing shaft 29; an upper chain wheel 30 and a lower chain wheel 30 are respectively arranged along the axial direction of the guide rail 3, a transmission chain 31 is wound on the chain wheels 30, two ends of the synchronizing shaft 29 are respectively in transmission connection with the chain wheels 30 at the top ends of the two guide rails 3, and the two transmission chains 31 are respectively connected with two ends of the lifting beam 4, so that the transmission chains 31 drive the lifting beam 4 to slide up and down. The lifting beam 4 can be driven to move up and down by the lifting motor 28, so that all the upper sunshade pieces 7 are driven to do up-and-down telescopic motion.

Preferably, the rotation driving system comprises a rotating motor 32, a driving rocker 33, a synchronous connecting rod 34; the rotating motor 32 is installed on the bottom beam 2 and is in transmission connection with the driving rocker 33, the driving rocker 33 is hinged with the synchronous connecting rod 34, and the synchronous connecting rod 34 is connected with the lower sunshade sheet 6 at the bottom end of each sunshade unit 5, so that the synchronous connecting rod 34 can drive all the sunshade units 5 to synchronously rotate. The driving rocker 33, the synchronous connecting rod 34 and the bottom end of the sunshade unit 5 form a double-rocker mechanism, so that the rotating motor 32 can drive all the sunshade units 5 to rotate and swing through the synchronous connecting rod 34, and the adjustment of the light transmittance is realized. Bearings are preferably correspondingly arranged between the lower half shaft 8 and the bottom beam 2 and between the upper half shaft 9 and the lifting beam 4 to ensure smooth rotation of the sun shading unit 5.

The electric sunshade provided by the invention can enable the sunshade unit 5 to be folded downwards, so that the normal sight of a person is not influenced, the electric sunshade has a wider visual field, can extend upwards, and can freely adjust and rotate to control the transmittance. The unique upper sunshade patch 7 structure has the functions of contraction and extension, so that the sunshade unit 5 can be extended upwards to be completely matched with the lower sunshade patch 6, and the structure of the middle sealing head 16 is provided to ensure stable joint, so that the appearance is attractive, and the wind resistance can be kept firmly. And the lifting driving system and the rotating driving system are mutually independent and can be independently controlled, and the product has a simple integral structure and is easy to assemble.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electric sunshade is characterized by comprising a lifting driving system, a rotary driving system, a top beam, a bottom beam, a guide rail, a lifting beam and a sunshade unit; the guide rails are vertically arranged on two sides, the top beam is connected to the top between the guide rails, and the bottom beam is connected to the bottom between the guide rails;

2. The electric sunshade of claim 1, wherein four unit pieces are arranged on each sunshade unit, are respectively arranged around and are divided into two first unit pieces and two second unit pieces, and the two first unit pieces and the two second unit pieces are oppositely arranged; the two ends of the first unit piece are provided with first connecting parts, the two ends of the second unit piece are provided with second connecting parts matched with the first connecting parts, so that the first connecting parts and the second connecting parts are spliced together when the first unit piece and the second unit piece are opened and extended, and the first connecting parts and the second connecting parts are separated from each other when the first unit piece and the second unit piece are contracted.

3. The motorized shade of claim 2, wherein the telescoping mechanism includes a fixed bracket, a first swing arm, a second swing arm, a first spring, a second spring, a first connecting member, a second connecting member, and an expansion mechanism; the two fixed brackets are fixedly and parallelly arranged along the upper half shaft; the first swing arm and the second swing arm are arranged corresponding to the first unit chip and the second unit chip respectively; one end of the first swing arm is hinged with the fixed support, and the other end of the first swing arm is hinged with the first connecting component; one end of the second swing arm is hinged with the fixed support, and the other end of the second swing arm is hinged with the second connecting component; the first swing arm and the first connecting member, and the second swing arm and the second connecting member respectively form a parallelogram mechanism, the inner side of the first unit piece is fixedly connected with the first connecting member, and the inner side of the second unit piece is fixedly connected with the second connecting member; the first spring is connected between the upper half shaft and the first connecting member, and the second spring is connected between the upper half shaft and the second connecting member, so that the first unit piece and the second unit piece elastically contract; the first connecting member is connected with the lower half shaft or the lower sunshade plate, and the second connecting member is connected with the lower half shaft or the lower sunshade plate through the expanding mechanism, so that the expanding mechanism drives the first unit piece and the second unit piece to be opened when the upper half shaft is stretched to the top.

4. The electric sunshade according to claim 3, wherein said expanding mechanism comprises a first expanding arm, a second expanding arm, a first sliding block, a second sliding block and a limiting block; the upper end of the first expansion arm is hinged with the first connecting member, the lower end of the first expansion arm is hinged with the first sliding block, and the first sliding block is connected with the lower half shaft in a sliding manner; the upper end of the second expansion arm is hinged with the second connecting member, the lower end of the second expansion arm is hinged with the second sliding block, and the second sliding block is in sliding connection with the lower half shaft; the top end of the lower half shaft is fixedly provided with a limiting block, so that the first unit piece and the second unit piece are pulled to be opened through the first expansion arm and the second expansion arm when the first sliding block and the second sliding block are jacked to the limiting block.

5. The motorized sunshade of claim 3, wherein said first unit piece is provided at an inner side thereof with a first coupling groove engaged with said first coupling member, and said second unit piece is provided at an inner side thereof with a second coupling groove engaged with said second coupling member; the first unit piece is sleeved on the first connecting component through the first connecting groove; the second unit piece is sleeved on the second connecting component through the second connecting groove.

6. The electric sunshade of claim 1, wherein the lower sunshade comprises a hollow cylindrical sunshade body and a lower end socket fixedly connected to the bottom of the sunshade body, and the lower end socket is fixedly connected to the lower half shaft.

7. The electric sunshade of claim 3, wherein the top of the lower sunshade plate is fixedly provided with a middle sealing head, the middle sealing head is in a hollow ring shape matched with the lower sunshade plate and the upper sunshade plate in shape, and the top side of the middle sealing head is provided with a sleeving groove used for keeping the upper sunshade plate stably connected, so that the upper sunshade plate is embedded in the sleeving groove after being opened to keep stable.

8. The electric sunshade of claim 3, wherein the top end of the upper sunshade sheet is provided with a flexible upper sealing head, so that the top of the upper sunshade sheet is closed in an expanded or contracted state.

9. The electric sunshade according to any one of claims 1 to 8, wherein said lift driving system comprises a lift motor, a synchronizing shaft, a sprocket, a transmission chain; the lifting motor is arranged on the top beam and is in transmission connection with the synchronous shaft; an upper chain wheel and a lower chain wheel are respectively arranged along the axial direction of the guide rail, the transmission chains are wound on the chain wheels, two ends of the synchronizing shaft are respectively in transmission connection with the chain wheels at the top ends of the two guide rails, and the two transmission chains are respectively connected with two ends of the lifting beam, so that the transmission chains drive the lifting beam to slide up and down.

10. Electric sunshade according to any of claims 1 to 8, wherein said rotary drive system comprises a rotary motor, a drive rocker, a synchronization link; the rotating motor is arranged on the bottom beam and is in transmission connection with the driving rocker, the driving rocker is hinged with the synchronous connecting rod, and the synchronous connecting rod is connected with the lower sunshade sheet at the bottom end of each sunshade unit, so that the synchronous connecting rod can drive all the sunshade units to synchronously rotate.