GB2297576A - Motor-driven automobile sunshade - Google Patents

Abstract

A motor-driven automobile sunshade includes two reversed screw rods 11 connected to a driving gear 112 at two opposite sides and respectively disposed in two split, preferably hexagonal, protective sleeves 19, a base frame 12 mounted around the protective sleeves to hold a motor housing 121 and an axle housing 124, a motor 15 mounted inside the motor housing and controlled to turn the driving gear through a pinion 151, a mounting frame unit 31, 32 securely fixed to the rear part of an automobile to hold the protective sleeves 19, a reversible shade roller 2 carried on the axle housing 124 of the base frame, two internally threaded hexagonal bushes 13 threaded onto the reversed screw rods 11, and two elongated rods 16 pivotably connected between a slat 22 of the shade body of the reversible shade roller and the bushes 13. When the motor 15 is turned to rotate the reversed screw rods 11 by the pinion 151 through the driving gear, the bushes 13 are forced to move along the rods 11, causing the elongated rods 16 to lift the shade body 23 (Fig 5).

Description

MOTOR-DRIVEN AUTOMOBILE SUNSHADE BACKGROUND OF THE INVENTION The present invention relates to a motordriven automobile sunshade which is controlled by a motor through a transmission mechanism to lift a shade body over the rear rear window for protection against the radiation of the sun.

Various sunshades have been disclosed for protecting the rear rear window against the radiation of sunlight. However, these sunshades are not convenient in use because they are operated by hand. There are certain structures of motor-driven sunshades appeared on the market. However, these motor-driven sunshades are commonly complicated and expensive.

SUMMARY OF THE INVENTION It is one object of the present invention to provide a motor-driven automobile sunshade which uses a mechanical transmission mechanism for transmitting the power of a motor to lift the shade body of a reversible shade roller. It is another object of the present invention to provide a motor-driven automobile sunshade which fully covers the rear window of the automobile when it is lifted. It is still another object of the present invention to provide a motor-driven automobile sunshade which does not hinder the automobile driver from viewing through the rear window when it is collapsed. It is still another object of the present invention to provide a motor-driven automobile sunshade which fits the rear window of any of a variety of automobiles.It is still another object of the present invention to provide a motor-driven automobile sunshade which is compact and lightweight. It is still another object of the present invention to provide a motor-driven automobile sunshade which is equipped with a third stop lamp. It is still another object of the present invention to provide a motor-driven automobile sunshade which is controlled by a control circuit through a touch-control button to automatically lift or collapse the shade body. It is still another object of the present invention to provide a motordriven automobile sunshade which can be controlled by a remote controller.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a motordriven automobile sunshade according to the present invention; Fig. 2 is similar to Figure 12 but showing the shade body partially lifted; Fig. 3 is an exploded view of the motordriven automobile sunshade shown in Figure 1; Fig. 4A is a side view in section of the motor-driven automobile sunshade shown in Figure 1, showing the shade body collapsed; Fig. 4B is a side view in section of the motor-driven automobile sunshade shown in Figure 1, showing the shade body lifted; Fig. 5 is front plain view of the motordriven automobile sunshade shown in Figure 1, showing the shade body lifted; and Fig. 6 is similar to Figure 1 but showing a third stop lamp installed in the circular axle housing of the base frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to Figures 1 and 2, a motor-driven automobile sunshade in according to the present invention, generally comprised of a screw rod transmission mechanism 1, a shade roller 2, and a mounting base unit 3.

Referring to Figure 3 and Figures 1 and 2 again, the screw rod transmission mechanism 1 comprises a base frame 12, which comprises two longitudinally aligned hexagonal axle housings 123 and a circular axle housing 124 shaped like a split tube and connected in parallel to the hexagonal axle housings 123, a motor housing 121 securely fixed to the bottom side of the base frame 12 and covered with a motor housing cover 122, a motor 15 mounted inside the motor housing 121, a pinion 151 securely mounted around the output shaft of the motor 15 and disposed outside the motor housing 121, two hexagonal protective sleeves 19 respectively inserted into the hexagonal axle housings 123, a driving gear 112 disposed between the hexagonal axle housings 123 and meshed with the pinion 151, two reversed screw rods 11 respectively inserted into the hexagonal protective sleeves 19 and fixedly connected to the driving gear 112 by a respective end pin 111, two internally threaded hexagonal bushes 13 respectively threaded onto the reversed screw rods 11 and having a respective stub screw rod 131 extended out of the longitudinal splits 192 on the hexagonal protective sleeves 19, two first end sockets 14 respectively turned about the stub screw rods 131 of the hexagonal bushes 13, two nuts 132 respectively threaded onto the stub screw rods 131 to hold the first end sockets 14 in place, two springs 141 respectively connected between the first end caps 14 and the hexagonal bushes 13, two elongated rods 16 respectively connected to the first end caps 14, two second end sockets 17 respectively pivotably connected to two opposite end holes 24 of the slat 22 of the shade roller 2 by nuts 171 to hold the opposite ends of the elongated rods 16, and two end caps 191 respectively covered on the hexagonal protective sleeves 19 to hold the reversed screw rods 11 inside the hexagonal protective sleeves 19. Furthermore, protective guard means 125 is provided and mounted around the driving gear 112 and the pinion 151 to give a protection.The shade roller 2 is comprised of a cylindrical casing 21 inserted through the circular axle housing 124 of the base frame 12 and having a longitudinal split 231, a slat 22 connected between the second end sockets 17, a reversing mechanism controlled reel 211 disposed inside the cylindrical casing 21, and a shade body 23 having one end connected to the reversing mechanism controlled reel 211 and an opposite end extended out of the cylindrical casing 21 through the longitudinal split 231 and connected to the slat 22.

The mounting base unit 3 comprises two mounting frames 31 for securely fixing to the rear part of an automobile, and two carrier frames 32 respectively fastened to the mounting frames 31 by screws 33 to hold the hexagonal protective sleeves 19. The mounting frames 31 have a respective upright support 31. The carrier frames 32 have a respective connecting bar 321 respectively connected to the upright supports 311 of the mounting frames 31 by the screws 33. The upright supports 311 and the connecting bars 321 are respectively made with radial teeth 34. When the upright supports 311 and the connecting bars 321 are connected together, the radial teeth 34 are respectively engaged together. By loosening the screws 33, the angular positions of the carrier frames 32 relative to the mounting frames 31 can be adjusted.

Referring to Figure 4A, when assembled, the shade body 23 is wound round the reel 211 and received inside the cylindrical casing 21 and the slat 22 is stopped at the split 231 outside the cylindrical casing 21.

Referring to Figure 4B and 5, when the pinion 151 is turned by the motor 15 to rotate the gear 112, the reversed screw rods 11 are rotated in reversed directions, causing the internally threaded bushes 13 moved apart from each other along the reversed screw rods 11 to lift the slat 22 through the elongated rods 16, and therefore the shade body 23 is stretched over the rear window of the automobile (not shown).

While only one embodiment of the present invention has been shown and described, it will be understood that various modifications and changes could be made without departing from the spirit and scope of the invention. For example: a third stop lamp A may be mounted on the circular axle housing 124 of the base frame 12 (see Figure 5); a control circuit may be installed and controlled by a touch control button to automatically control the motor 15 to lift the shade body 23; a remote controller may be used to control the operation of the motor 15 from a distance.

Claims (10)

What is claimed is:

1. A motor-driven automobile sunshade comprising: a mounting base unit, said mounting base unit comprising two mounting frames for securely fixing to the rear part of an automobile, and two carrier frames respectively fastened to said mounting frames by screws; a transmission mechanism, said transmission mechanism comprising two protective sleeves respectively fastened to said carrier frames and longitudinally connected together, each protective sleeve having a longitudinal split through the length thereof, a base frame mounted around said protective sleeves to hold a motor housing and an axle housing, a motor mounted inside said motor housing and having an output shaft extended out of said motor housing, a pinion fixedly mounted around said output shaft, a driving gear disposed between said said protective sleeves and meshed with said pinion, two reversed screw rods respectively inserted into said protective sleeves and fixedly connected to two opposite sides of said driving gear, two internally threaded hexagonal bushes respectively threaded onto said reversed screw rods and having a respective stub screw rod extended out of the longitudinal splits on said protective sleeves, two first end sockets respectively turned about said stub screw rods of said hexagonal bushes, two springs respectively connected between said first end caps and said hexagonal bushes, two second end sockets, and two elongated rods respectively connected between said first end sockets and said second end sockets;; a shade roller, said shade roller comprising a cylindrical casing fastened to the axle housing of the base frame of said transmission mechanism and having a longitudinal split, a reversible mechanism controlled reel mounted inside said cylindrical casing, a slat having two opposite ends respectively pivotably connected to said second end sockets, and a shade body having one end connected to said reversible mechanism controlled reel and an opposite end extended out of the longitudinal split on said cylindrical casing and connected to said slat; and wherein when said motor is turned to rotate said reversed screw rods by said pinion through said driving gear, said internally threaded bushes are forced to move along said reversed screw rods, causing said elongated rods to lift said shade body.

2. The motor-driven automobile sunshade of claim 1 wherein said protective sleeves have a uniform hexagonal cross section respectively mounted around said internally threaded hexagonal bushes to stop them from rotary motion relative to said protective sleeves.

3. The motor-driven automobile sunshade of claim 1 wherein said mounting frames have a respective upright support respectively made with radial teeth, said carrier frames have a respective connecting bar respectively made with radial teeth and meshed with the radial teeth on the upright supports of said mounting frames and secured in position by a respective screw.

4. The motor-driven automobile sunshade of claim 1 wherein said slat has two end holes at two opposite ends thereof respectively connected to said second end sockets by a respective nut.

5. The motor-driven automobile sunshade of claim 1 wherein the stub screw rods of said internally threaded hexagonal bushes are screwed up with a respective nut to hold said first end sockets in place.

6. The motor-driven automobile sunshade of claim 1 wherein said protective sleeves have a respective outer end covered with an end cap.

7. The motor-driven automobile sunshade of claim 1 further comprising a third stop lamp mounted on the axle housing of the base frame of said transmission mechanism.

8. The motor-driven automobile sunshade of claim 1 further comprising a control circuit controlled by a touch control button to control the operation of said motor in lifting said shade body automatically.

9. The motor-driven automobile sunshade of claim 1 further comprising a remote controller for controlling the operation of said motor from a distance.

10. Motor-driven automobile sunshades as claimed in claim 1 and as herein described.

ii. Motor-driven automobile sunshades as herein described and illustrated with reference to the accompanying drawings.