Electric roller shutter capable of ascending and descending in case of power loss

Abstract

The invention discloses an electric roller shutter capable of ascending and descending during power loss, which comprises a reel pipe, a shading cloth wound on the reel pipe, a bottom rod arranged at the lower end of the shading cloth, a tail arranged at one end of the reel pipe, a first bracket rotationally connected to the tail, a tubular motor arranged in the reel pipe, and a driving wheel arranged at the output end of the tubular motor and connected with the reel pipe, a driving sleeve is arranged at the other end of the reel pipe, a driving chain is arranged on the driving sleeve, a second support is arranged on one side of the driving sleeve, a lifting plate is arranged on the second support, a spring is arranged at the bottom of the lifting plate, a supporting sleeve fixed to the tubular motor is arranged on the lifting plate, and the supporting sleeve penetrates through the driving sleeve and is rotationally connected with the driving sleeve; a conductive sliding ring connected with the tubular motor is arranged in the supporting sleeve, the top of the supporting sleeve exceeds the lifting plate, and an inserting mechanism is arranged between the top of the supporting sleeve and the second support. The invention has the advantages of electric and manual dual opening and closing functions, low failure rate, lower overall cost and convenience in installation.

Description

Technical Field

[0001] This invention belongs to the field of curtains, and particularly relates to a curtain lifting drive mechanism. Background Technology

[0002] There are currently two types of curtains on the market: manual and electric.

[0003] Manual blinds consist of a roller tube with blackout fabric wound around it. A weighted rod at the bottom of the blackout fabric helps to keep the fabric level. One end of the roller tube has a tail, and the other end has a head with a ring-shaped beaded chain. Both the head and tail are fixed to the wall near the window by brackets. Pulling one side of the beaded chain rotates the head clockwise, causing the roller tube to rotate. This causes the blackout fabric to detach, the rod to lower, and the blackout area to increase. Pulling the other side of the beaded chain retracts the fabric, raises the rod, and reduces the blackout area. Manual blinds are simple in structure and relatively inexpensive. The main difference between electric and manual curtains is that electric curtains use a tubular motor instead of a control head. The tubular motor drives the roller tube to rotate in both directions to raise and lower the curtain. The structure of the tubular motor includes a motor body and a gearbox set on the same axis. The motor body drives the roller tube through the gearbox. Because the speed ratio of the geared motor is large, the torque is transmitted in one direction only, and can only be transmitted from the motor body to the roller tube. The torque on the roller tube is not enough to drive the output end of the motor body to rotate.

[0004] Manual curtains are simple in structure, low in cost, and reliable in performance, but they are difficult to integrate into smart home systems in the context of home automation. While motorized curtains can connect their tubular motors to smart home systems for networked operation, enabling functions such as voice control and preset scheduled raising and lowering, their raising and lowering functions disappear in the event of smart home system malfunctions, network failures, tubular motor failures, or power outages. This makes them unusable manually in emergencies, resulting in poor performance. Summary of the Invention

[0005] The purpose of this invention is to provide an electrically operated roller blind that can be raised and lowered even in the event of power failure. This invention has the advantages of dual electric and manual opening and closing functions, low failure rate, low overall cost, and easy installation.

[0006] The technical solution of the present invention: an electric roller blind that can be raised and lowered when power is lost, comprising a roller tube, a light-blocking cloth wound around the roller tube, a bottom rod at the lower end of the light-blocking cloth, a tail at one end of the roller tube, a first bracket rotatably connected to the tail, a tubular motor inside the roller tube, a drive wheel connected to the roller tube at the output end of the tubular motor, a drive sleeve at the other end of the roller tube, a drive chain on the drive sleeve, a second bracket on one side of the drive sleeve, a lifting plate on the second bracket, a spring at the bottom of the lifting plate, a support sleeve fixed to the tubular motor on the lifting plate, the support sleeve passing through the drive sleeve and rotatably connected to the drive sleeve, a conductive slip ring connected to the tubular motor inside the support sleeve, and a plug-in mechanism between the top of the support sleeve and the second bracket.

[0007] In the aforementioned electrically operated roller shutter that can be raised and lowered when power is lost, the inner end of the drive sleeve is inserted into the roller tube, and the outer circumferential surface of the outer end of the drive sleeve is provided with a plurality of circumferentially evenly distributed spherical cavities; the drive chain adopts an annular beaded chain.

[0008] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the second bracket is provided with an anti-detachment plate coaxially arranged with the drive sleeve, and the anti-detachment plate 14 is arc-shaped.

[0009] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the second bracket is provided with a square hole, the lifting plate is located in the square hole, the two sides of the lifting plate are slidably connected to the vertical wall of the square hole, and the spring is located between the bottom surface of the square hole and the lifting plate.

[0010] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the spring is formed by punching elastic steel plate and includes a base plate connected to the bottom surface of the square hole. Both ends of the base plate are provided with elastic arms that can be repeatedly bent.

[0011] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the insertion mechanism includes a groove located in the middle of the top of the square hole, the bottom surface of the groove is an arc surface, and the bottom surface of the groove is provided with downwardly extending teeth; the insertion mechanism also includes a plurality of teeth evenly distributed circumferentially on the outer circumferential surface of the outer end of the support sleeve.

[0012] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the top of the lifting plate is provided with a notch. The inner wall of the notch is composed of an arc surface and vertical surfaces located at both ends of the arc surface. The diameter of the arc surface matches the support sleeve, and the top of the support sleeve extends out from the notch.

[0013] In the aforementioned electrically operated roller blind that can be raised and lowered when power is lost, the encirclement angle of the arc surface is greater than 240°.

[0014] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, both the first bracket and the second bracket are L-shaped, and both the top of the first bracket and the top of the second bracket are provided with mounting holes.

[0015] In the aforementioned electric roller shutter that can be raised and lowered when power is lost, the lower end of the drive chain is provided with a positioning plate, the positioning plate is provided with screw holes, the upper end of the positioning plate is rolled up to form a hook, the drive chain passes through the inside of the hook, and the top of the inner wall of the hook is provided with a transition curved surface.

[0016] Compared to existing technologies, this invention incorporates a tubular motor, which powers the raising and lowering of the curtains. Therefore, it can be connected to a smart home system for networked operation. A drive sleeve is installed at the end of the roller tube, a drive chain is mounted on the drive sleeve, a lifting plate is mounted on the bracket, a spring is installed at the bottom of the lifting plate, and a support sleeve fixed to the tubular motor is mounted on the lifting plate. The support sleeve is rotatably connected to the drive sleeve, allowing manual pulling of the drive chain to rotate the roller tube and raise or lower the curtains when the tubular motor loses power or malfunctions, meeting emergency use needs. During the rotation of the roller tube, the tubular motor also rotates, but because it is powered through a conductive slip ring, the power cord will not kink or break, reducing the failure rate. A positioning plate is installed, and after fixing it to the wall, hooks constrain the drive chain, preventing it from wobbling and preventing the bottom rod from entering the annular area of ​​the drive chain, ensuring smooth curtain raising and lowering. Furthermore, this invention features a simple structure, achieving both electric and manual opening and closing functions with minimal cost increase, resulting in a low overall cost. Its compact design also minimizes the increase in curtain width when the roller length is fixed, making installation convenient. In summary, this invention offers the advantages of electric and manual dual opening and closing functions, low failure rate, low overall cost, and easy installation. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the present invention.

[0018] Figure 2 This is a left-side view of the second support.

[0019] Figure 3 This is a left-side view of the lifting platform. Figure 4 This is a right-side view of the second support.

[0020] Figure 5 This is a right-side view of the second bracket when the drive chain is pulled down.

[0021] Figure 6 This is a schematic diagram of the cross-section of the drive sleeve at the ball cavity.

[0022] Figure 7 This is a front view of the positioning plate.

[0023] The labels in the attached diagram are as follows: 1-Rolled tube, 2-Tail end, 3-First bracket, 4-Tube motor, 5-Drive wheel, 6-Drive sleeve, 7-Drive chain, 8-Second bracket, 9-Lifting plate, 10-Spring, 11-Support sleeve, 12-Conductive slip ring, 13-Spherical cavity, 14-Anti-detachment plate, 15-Square hole, 16-Base plate, 17-Elastic arm, 18-Groove, 19-Tooth, 20-Groove, 21-Arc surface, 22-Vertical surface, 23-Mounting hole, 24-Light-shielding cloth, 25-Base rod, 26-Positioning plate, 27-Screw hole, 28-Hook, 29-Transition curved surface. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0025] Example: An electrically operated roller blind that can be raised and lowered even when power is lost, such as... Figure 1 As shown, it includes a roller tube 1, with a light-blocking cloth 24 wound around the roller tube 1. The lower end of the light-blocking cloth 24 is provided with a bottom rod 25. One end of the roller tube 1 is provided with a tail 2, which is inserted into the roller tube 1. A first bracket 3 is rotatably connected to the tail 2. A tubular motor 4 is provided inside the roller tube 1. The output end of the tubular motor 4 is provided with a drive wheel 5 connected to the roller tube 1. The other end of the roller tube 1 is provided with a drive sleeve 6.

[0026] The inner end of the drive sleeve 6 is inserted into the coil tube 1 and fixed to the coil tube 1. The outer circumferential surface of the outer end of the drive sleeve 6 is provided with a plurality of circumferentially evenly distributed spherical cavities 13. The drive sleeve 6 is provided with a drive chain 7. The drive chain 7 is a ring-shaped bead chain. The diameter of the beads on the bead chain matches the spherical cavity 13, and the spacing between the beads matches the distribution pitch of the spherical cavity 13. Several beads at the top of the bead chain are respectively located in several spherical cavities 13 at the top of the drive sleeve 6.

[0027] The lower end of the drive chain 7 is provided with a positioning plate 26, which has screw holes 27. The upper end of the positioning plate 26 is curled to form a hook 28. The drive chain 7 passes through the inside of the hook 28. The top of the inner wall of the hook 28 is provided with a transition curved surface 29. The positioning plate 26 is fixed to the wall at the window by screws passing through the screw holes 27.

[0028] A second bracket 8 is provided on one side of the drive sleeve 6. A square hole 15 is provided on the second bracket 8. A lifting plate 9 is provided inside the square hole 15. The two sides of the lifting plate 9 are slidably connected to the vertical wall of the square hole 15. The slidable connection can be achieved by a combination of a sliding groove and a sliding strip.

[0029] A spring 10 is provided at the bottom of the lifting plate 9. The spring 10 is formed by punching elastic steel plate and includes a base plate 16 that connects to the bottom surface of the square hole 15. Both ends of the base plate 16 are provided with elastic arms 17 that can be bent repeatedly. The upper end of the elastic arms 17 is connected to the lifting plate 9. The characteristics of this spring structure are small size, large elasticity and good stability.

[0030] The lifting plate 9 is provided with a support sleeve 11, which passes through the drive sleeve 6 and is rotatably connected to the drive sleeve 6. The inner end of the support sleeve 11 is coaxially inserted into the tubular motor 4 and the two are fixed together.

[0031] The support sleeve 11 is provided with a conductive slip ring 12, which is electrically connected to the tubular motor and is fixed to the support sleeve 11.

[0032] The top of the lifting plate 9 has a notch, the inner wall of which is composed of an arc surface 21 and vertical surfaces 22 located at both ends of the arc surface 21. The encirclement angle of the arc surface 21 is greater than 240°, and the diameter of the arc surface 21 matches the support sleeve 11. The top of the support sleeve 11 extends out from the notch. The top of the square hole 15 has a groove 18 in the middle, the bottom surface of the groove 18 is an arc surface 21, and the bottom surface of the groove 18 has a downwardly extending tooth 19 in the middle. The outer circumferential surface of the outer end of the support sleeve 11 has a plurality of circumferentially evenly distributed tooth grooves 20, the shape of which matches the tooth 19.

[0033] The second bracket 8 is provided with an anti-detachment plate 14 coaxially arranged with the drive sleeve 6. The anti-detachment plate 14 is arc-shaped and located on the upper side of the drive sleeve 6 with a wrap angle greater than 90°. It is used to prevent the drive chain 7 from completely separating from the drive sleeve 6, always maintain the component status, and reduce the failure rate.

[0034] Both the first bracket 3 and the second bracket 8 are L-shaped, and each has a mounting hole 23 at its top. The first bracket 3 and the second bracket 8 are fixed to the wall at the window by screws passing through the mounting holes 23.

[0035] Working principle: The blackout cloth 24 is wound onto the roller tube 1, and under the action of the spring 10, as... Figure 4 As shown, the lifting plate 9 is in a high position, and the teeth 19 are inserted into one of the grooves 20, preventing the support sleeve 11 from rotating. When the tubular motor 4 is working normally, the tubular motor 4 rotates the drive wheel 5, which in turn drives the roller tube 1 to rotate, thus raising and lowering the curtain. When the roller tube 1 rotates, it drives the drive sleeve 6 to rotate around the support sleeve 11, and the drive chain 7 moves up and down on both sides respectively. Because the lower end of the drive chain 7 is constrained by the hook 28, the drive chain 7 will not wobble, avoiding interference with the blackout fabric 24 and the bottom rods 25 moving up and down.

[0036] When the tubular motor 4 malfunctions, pulling down one side of the drive chain 7 causes the lifting plate 9 to descend a certain height, overcoming the elasticity of the spring 10, thus separating the teeth 19 from the grooves 20 and allowing the support sleeve 11 to rotate smoothly. Because the downward force acts on one side of the drive sleeve 6, the drive sleeve 6 rotates, causing the roller tube 1 to rotate, thereby raising and lowering the curtain. When the roller tube 1 rotates, it drives the tubular motor 4 to rotate as a whole via the drive wheel 5. The tubular motor 4 then drives the support sleeve 11 and the conductive slip ring to rotate together.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

Claims

1. An electric roller blind that can be raised and lowered when power is lost, comprising a roller tube (1), a light-blocking cloth (24) wrapped around the roller tube (1), a bottom rod (25) provided at the lower end of the light-blocking cloth (24), and a tail (2) provided at one end of the roller tube (1), on which a first bracket (3) is rotatably connected, characterized in that: A tubular motor (4) is provided inside the coil (1). The output end of the tubular motor (4) is provided with a drive wheel (5) connected to the coil (1). The other end of the coil (1) is provided with a drive sleeve (6). A drive chain (7) is provided on the drive sleeve (6). A second bracket (8) is provided on one side of the drive sleeve (6). A lifting plate (9) is provided on the second bracket (8). A spring (10) is provided at the bottom of the lifting plate (9). A support sleeve (11) is provided on the lifting plate (9) and fixed to the tubular motor (4). The support sleeve (11) passes through the drive sleeve (6) and is rotatably connected to the drive sleeve (6). A conductive slip ring (12) connected to the tubular motor (4) is provided inside the support sleeve (11). The top of the support sleeve (11) extends beyond the lifting plate (9) and is connected to the second bracket (8) by a plug-in mechanism.

2. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 1, characterized in that: The inner end of the drive sleeve (6) is inserted into the coil tube (1), and multiple circumferentially distributed ball cavities (13) are provided on the outer circumferential surface of the outer end of the drive sleeve (6); the drive chain (7) adopts an annular bead chain.

3. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 2, characterized in that: The second bracket (8) is provided with an anti-detachment plate (14) coaxially arranged with the drive sleeve (6), and the anti-detachment plate (14) is arc-shaped.

4. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 1, characterized in that: The second bracket (8) is provided with a square hole (15), the lifting plate (9) is located inside the square hole (15), the two sides of the lifting plate (9) are slidably connected to the vertical wall of the square hole (15), and the spring (10) is located between the bottom surface of the square hole (15) and the lifting plate (9).

5. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 4, characterized in that: The spring (10) is formed by punching elastic steel plate and includes a base plate (16) connecting the bottom surface of the square hole (15). Both ends of the base plate (16) are provided with elastic arms (17) that can be bent repeatedly.

6. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 4, characterized in that: The insertion mechanism includes a groove (18) located in the middle of the top of the square hole (15), the bottom surface of the groove (18) is an arc surface (21), and the bottom surface of the groove (18) is provided with downwardly extending teeth (19); the insertion mechanism also includes a plurality of teeth (20) evenly distributed circumferentially on the outer circumferential surface of the outer end of the support sleeve (11).

7. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 6, characterized in that: The top of the lifting plate (9) has a notch. The inner wall of the notch is composed of an arc surface (21) and vertical surfaces (22) located at both ends of the arc surface (21). The diameter of the arc surface (21) matches the support sleeve (11), and the top of the support sleeve (11) extends out from the notch.

8. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 7, characterized in that: The encirclement angle of the arc surface (21) is greater than 240°.

9. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 1, characterized in that: Both the first bracket (3) and the second bracket (8) are L-shaped, and the top of the first bracket (3) and the top of the second bracket (8) are provided with mounting holes (23).

10. The electrically operated roller blind that can be raised and lowered in the event of power failure according to claim 2, characterized in that: The lower end of the drive chain (7) is provided with a positioning plate (26), the positioning plate (26) is provided with screw holes (27), the upper end of the positioning plate (26) is curled to form a hook (28), the drive chain (7) passes through the inside of the hook (28), and the top of the inner wall of the hook (28) is provided with a transition surface (29).

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