CN111956045B - An electric curtain - Google Patents

Abstract

The invention relates to the technical field of curtains, in particular to an electric curtain which comprises a first fixing plate and a second fixing plate, wherein the number of the first fixing plate and the number of the second fixing plate are two, the two first fixing plates are fixed on a wall through long screws, the two second fixing plates are fixedly connected to the first fixing plates, a round rod is rotatably connected between the two second fixing plates through a bearing, two sections of thread grooves with opposite thread directions are formed in the round rod, a first sliding round rod is fixedly welded between the two second fixing plates, the first sliding round rod is arranged in parallel with the round rod, a plurality of hanging rings are sleeved on the first sliding round rod, a first translation block is arranged outside the round rod and the first sliding round rod, and the first translation block is in threaded connection with the thread grooves in the round rod. The invention solves the defects that the two sides of the curtain are asymmetric under the action of external force pulling in the prior art, the middle of the electric curtain cannot be closed, and the opening and the closing of the electric curtain cannot be in place, has obvious beneficial effects and is suitable for popularization.

Description

An electric curtain

Technical field

The present invention relates to the technical field of curtains, and in particular to an electric curtain.

Background technique

Electric curtains use a motor to drive the curtains to control the opening and closing of the curtains. From the installation point of view, it can be divided into built-in type and external type. Electric curtains are divided into electric opening and closing curtain series, electric lift curtain series, electric ceiling curtains, electric sun visors, electric awnings and other series according to different operating mechanisms and decorative effects, such as venetian blinds, roller blinds, Roman blinds, and soft gauze. Curtains, accordion curtains, honeycomb curtains, etc.

Existing electric curtains are different from traditional curtains. The existing electric curtain annular slide wires and hanging rings are no longer bound together, but are connected through a belt. The belt runs in the inner cavity of the closed curtain rod and pulls the curtain through the buckle on the belt. However, after a power outage, the existing electric curtains can only be opened or merged by manually pulling the curtains. The buckle on the belt is easy to slide on the belt under the action of external force, causing the problem to occur later when the power is used. The curtains are asymmetrical on both sides, and the electric curtains cannot be close together in the middle, and the opening and closing are not in place. At this time, you need to manually pull the curtains to adjust the positions of the two curtains to make the two pairs of curtains symmetrical. However, it is difficult to ensure that the curtains are adjusted to the appropriate position by manually pulling the curtains. , the curtains need to be pulled multiple times to correct the position. Since the service life of electric curtains is between three and five years and they are expensive, such operation will seriously reduce the service life of electric curtains. For this reason, we designed an electric curtain.

Contents of the invention

The purpose of the present invention is to propose an electric curtain in order to solve the shortcomings in the prior art that the curtains are asymmetrical on both sides due to external force pulling, the electric curtains cannot be close together in the middle, and the opening and closing are not in place.

In order to achieve the above objects, the present invention adopts the following technical solutions:

Design an electric curtain, including a first fixed plate and a second fixed plate. The number of the first fixed plate and the second fixed plate is two. The two first fixed plates are fixed on the wall through long screws. The two second fixed plates are fixedly connected to the first fixed plate. A round rod is rotatably connected between the two second fixed plates through a bearing. The round rod is provided with two sections of threaded grooves with opposite thread directions. , a first sliding round rod is fixedly welded between the two second fixed plates, the first sliding round rod is arranged parallel to the round rod, and a plurality of hanging rings are set on the first sliding round rod, so A first translation block is provided on the outside of the round rod and the first sliding round rod. The first translation block is threadedly connected to the thread groove on the round rod. The first translation block is slidingly connected to the first sliding round rod. , the bottom end of the first translation block is fixedly connected with a self-locking ring hook, and a motor is fixedly installed on one of the second fixed plates through a bracket. A connection mechanism is provided between the round rod and the motor. The connection The mechanism includes a first fastener fixedly welded on the output end of the motor. One end of the round rod penetrates the second fixed plate where the motor is located and a second fastener is slidably provided on the outer wall of the round rod. The first fastener can Snap-connected to the second fastener, a chute is provided on the outer wall of the round rod, and a slider fixedly connected to the second fastener is slidably provided in the chute. The slider is made of magnetic material. The first electromagnet is fixedly installed at one end of the chute close to the motor, a connecting rod is fixedly welded to the outer wall of the round rod, and a contraction spring is fixedly connected between the connecting rod and the second fastener. An annular slot is provided on the outer wall of the second fastener, and a curtain cord is provided in the annular slot.

Preferably, the round rod is sleeved outside the output end of the motor, and a bearing is provided between the round rod and the output end of the motor.

Preferably, a second sliding round rod is fixedly welded between the two second fixed plates, and a second round rod is rotatably connected between the two second fixed plates through a bearing, and there is an opening on the second round rod. There are two sections of second thread grooves with opposite thread directions. A transmission mechanism is provided between the round rod and the second round rod. A plurality of the hanging rings are sleeved on the second sliding round rod. The second sliding round rod A second translation block is provided on the outside of the rod and the second round rod. The second translation block is threadedly connected to the second threaded groove on the second round rod. The second translation block slides with the second sliding round rod. connection, the self-locking ring hook is fixedly connected to the bottom end of the second translation block, and a limiting mechanism is provided between the first translation block and the round rod and between the second translation block and the second round rod.

Preferably, the transmission mechanism includes a synchronous pulley fixedly arranged on the outer wall of the round rod and the second round rod, and a synchronous belt is set between the two synchronous pulleys.

Preferably, the limiting mechanism includes a circular ring rotatably arranged inside the first translation block and the second translation block. The circular ring is threadedly connected to the round rod and the second circular rod. The circular ring is connected to the first translation block. A limiting groove is provided on the outer wall where the block and the second translation block are connected. A groove is provided on the inner wall where the first translation block and the second translation block are connected to the ring. A blocking block is slidably provided in the groove. , the clamping block is made of magnetic material, a compression spring is fixedly connected between the clamping block and the groove, and a second electromagnet is fixedly installed at the bottom of the groove and inside the compression spring. , the clamping block can be inserted into the limiting groove under the elastic force of the compression spring.

Preferably, the hanging ring includes a first arc-shaped ring and a second arc-shaped ring, the first arc-shaped ring and the second arc-shaped ring are fixedly welded end to end, and the cross-sectional diameter of the second arc-shaped ring is smaller than the first arc-shaped ring. The cross-sectional diameter of the arc-shaped ring, the second arc-shaped ring is covered with a plurality of balls arranged in parallel, and the first arc-shaped ring is fixedly welded with a self-locking ring.

Preferably, the self-locking ring includes a first connecting rod and a second connecting rod fixedly welded on the first arc-shaped ring, and an end of the first connecting rod away from the first arc-shaped ring is rotationally connected to a third connecting rod. , a torsion spring is provided between the third connecting rod and the first connecting rod. Under the action of the torsion spring, the end of the third connecting rod away from the first link is connected with the end of the second connecting rod away from the first arc-shaped ring. One end is in contact with pressure.

Preferably, reinforcing ribs are fixedly welded between the second fixing plate and the first fixing plate.

The beneficial effect of the electric curtain proposed by the present invention is that by changing the existing belt drive into a thread drive, the first translation block and the second translation block will not move easily, and only the round rod and the second round The first translation block and the second translation block will move only when the rod rotates, thus ensuring that the two pairs of curtains are always symmetrical, and the rotation of the round rod can be driven by both manual and electric methods, and the curtains can be controlled even during a power outage. Opening and closing, and both manual and electric driving methods need to control the rotation of the round rod, so the two curtains always remain symmetrical. The present invention solves the problem in the prior art that the two sides of the curtain will be asymmetrical under the action of external force, and the middle of the electric curtain cannot be The shortcomings of being close together and not opening and closing in place have obvious beneficial effects and are suitable for promotion.

Description of drawings

Figure 1 is a schematic top view of the electric curtain proposed by the present invention;

Figure 2 is a schematic front structural view of an electric curtain proposed by the present invention;

Figure 3 is an enlarged schematic diagram of the structure of part A in Figure 1;

Figure 4 is a schematic three-dimensional structural diagram of a connecting mechanism of an electric curtain proposed by the present invention;

Figure 5 is a schematic cross-sectional structural diagram of a connecting mechanism of an electric curtain proposed by the present invention;

Figure 6 is a schematic cross-sectional structural diagram of the first translation block of an electric curtain proposed by the present invention;

Figure 7 is an enlarged schematic diagram of the structure of part B in Figure 6;

Figure 8 is a schematic structural diagram of a hanging ring of an electric curtain proposed by the present invention.

In the picture: 1 first fixed plate, 2 second fixed plate, 3 round rod, 4 threaded groove, 5 first sliding round rod, 6 ring, 7 first translation block, 8 motor, 9 first fastener, 10 Second fastener, 11 chute, 12 slide block, 13 first electromagnet, 14 contraction spring, 15 annular slot, 16 curtain rope, 17 second sliding round rod, 18 second translation block, 19 limit slot , 20 groove, 21 block, 22 compression spring, 23 second electromagnet, 24 hanging ring, 25 self-locking ring hook, 26 first arc ring, 27 second arc ring, 28 second round rod, 29 balls, 30 self-locking ring, 31 first connecting rod, 32 second connecting rod, 33 third connecting rod, 34 connecting rod, 35 second thread groove, 36 synchronous pulley, 37 synchronous belt.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments.

Example 1

Referring to Figures 1-8, an electric curtain includes a first fixed plate 1 and a second fixed plate 2. The number of the first fixed plate 1 and the second fixed plate 2 is two. The two first fixed plates 1 pass through a long The screws are fixed on the wall, and the two second fixing plates 2 are fixedly connected to the first fixing plate 1. Reinforcement ribs are fixedly welded between the second fixing plate 2 and the first fixing plate 1. Between the two second fixing plates 2 There is a round rod 3 connected by rotation through bearings. The round rod 3 is provided with two threaded grooves 4 with opposite thread directions. A first sliding round rod 5 is fixedly welded between the two second fixed plates 2. The first sliding round rod 5 is arranged parallel to the round rod 3. A plurality of hanging rings 24 are set on the first sliding round rod 5. A first translation block 7 is provided outside the round rod 3 and the first sliding round rod 5. The first translation block 7 is connected to the first sliding round rod 5. The threaded groove 4 on the round rod 3 is threaded, and the first translation block 7 is slidingly connected to the first sliding round rod 5. The bottom end of the first translation block 7 is fixedly connected with a self-locking ring hook 25. When the round rod 3 rotates At this time, due to the threaded connection between the first translation block 7 and the round rod 3, and the first translation block 7 is limited by the first sliding round rod 5, the two first translation blocks 7 move toward each other on the round rod 3. Or move backward, the curtain is hung on the first sliding round rod 5 under the action of the self-locking ring hook 25 and the hanging ring 24, and the moving end of the curtain is fixedly connected to the first translation block 7 under the action of the self-locking ring hook 25. On the top, the fixed end of the curtain is fixed on the second fixed plate 2, and the moving ends of the two curtains follow the two first translation blocks 7 to move toward or back to realize the opening and closing of the curtain. By modifying the existing belt drive The first translation block 7 will not move due to pulling the curtain on the round rod 3. Only when the round rod 3 rotates will the first translation block 7 move, thereby ensuring that the two pairs of curtains are always symmetrical. .

The rotation of the round rod 3 can be controlled by the servo motor. However, in the event of a power outage, the servo motor cannot rotate and the servo motor has a self-locking function. As a result, even if external force is used, the rotation of the round rod 3 cannot be controlled, resulting in the curtain being unable to open or close during a power outage. To solve this problem, we set up a connection mechanism between the servo motor and the round rod 3. This connection mechanism is a connection between the output end of the servo motor and the round rod 3 when there is power. The servo motor can drive the round rod. 3 rotates, and the round rod 3 is separated from the output end of the servo motor during a power outage, so that the self-locking function of the servo motor will not affect the rotation of the round rod 3. In the present invention, one of the second fixed plates 2 is fixedly installed with a bracket. Motor 8 is a servo motor. A connecting mechanism is provided between the round rod 3 and the motor 8. The connecting mechanism includes a first fastener 9 fixedly welded on the output end of the motor 8. One end of the round rod 3 passes through the motor 8. A second fastener 10 is slidably provided on the outer wall of the second fixed plate 2 and the round rod 3. The first fastener 9 can be engaged with the second fastener 10. A slide groove 11 is provided on the outer wall of the round rod 3. A slider 12 fixedly connected to the second fastener 10 is slidably provided in the groove 11. The slider 12 can only slide in the slider 11. The slider 12 is fixedly connected to the second fastener 10, so the second fastener 10 is also It can only slide horizontally on the outer wall of the round rod 3, and the second fastener 10 and the round rod 3 rotate synchronously. The slider 12 is made of magnetic material, and one end of the slide 11 close to the motor 8 is fixedly installed. When the first electromagnet 13 is powered, the first electromagnet 13 is always energized to attract the slider 12 and adsorb the slider 12 . At this time, the second fastener 10 fixedly connected to the slider 12 moves with the slider 12 And offsets the first fastener 9. When the motor 8 rotates, the first fastener 9 fixedly connected to the output end of the motor 8 follows the rotation. At this time, the second fastener 10 that offsets the first fastener 9 is inserted into the first fastener 9. In the notch of the fastener 9, a snap connection is formed between the first fastener 9 and the second fastener 10, so that the second fastener 10 rotates following the first fastener 9. When the second fastener 10 rotates, it will drive the second fastener 9 and the second fastener 10. The round rod 3 that rotates synchronously with the second fastener 10 rotates, and the rotation of the round rod 3 controls the first translation block 7 to move toward or away from the round rod 3; a connecting rod 34 is fixedly welded to the outer wall of the round rod 3, and is connected A contraction spring 14 is fixedly connected between the rod 34 and the second fastener 10. When there is a power outage, the first electromagnet 13 cannot be energized. At this time, the first electromagnet 13 does not have magnetism, and the contraction spring 14 will pull the second fastener 10. The round rod 3 moves away from the first fastener 9. At this time, there is no connection relationship between the first fastener 9 and the second fastener 10, so there is no connection relationship between the second fastener 10 and the motor 8, so During a power outage, the self-locking function of the motor 8 no longer affects the rotation of the round rod 3. At this time, the round rod 3 can rotate under the action of external force, and controls the first translation block 7 to move toward or away from the round rod 3.

In the present invention, an annular slot 15 is provided on the outer wall of the second fastener 10, a curtain pull cord 16 is provided in the annular slot 15, and a plurality of spherical slots arranged side by side are provided in the annular slot 15, and A baffle is fixedly provided at the edge of the annular slot 15, and the baffle resists the limit bead on the curtain pull cord 16 and is always stuck in the spherical slot in the annular slot 15, thus ensuring that the second fastener 10 is connected to the curtain pull cord 16. The ropes 16 rotate synchronously, so when the curtain rope 16 is pulled, the second fastener 10 rotates synchronously with the curtain rope 16. When the second fastener 10 rotates, it will drive the circle that rotates synchronously with the second fastener 10. When the rod 3 rotates, the rotation of the round rod 3 controls the first translation block 7 to move toward or away from the round rod 3; the round rod 3 is set outside the output end of the motor 8, and the connection between the round rod 3 and the output end of the motor 8 is Bearings are provided in between, which can ensure that the axis of the output end of the motor 8 always coincides with the axis of the round rod 3, thereby avoiding the deviation of the motor 8 after long-term use, resulting in the failure of the first fastener 9 and the second fastener 10.

Example 2

Generally speaking, the effect of double-layer curtains is much better. In addition to beautifying the room, the layering function can also block sunlight and light. The main function of the gauze layer is to be beautiful. First, it echoes the cloth layer and increases the overall sense of layer extension of the curtain. It partially softens the rigid monotony of glass windows. Generally, the outer layer of a double-layered window is a blackout curtain, which prevents sunlight or outdoor lights from entering the house. The inner layer is a normal curtain. Most of the existing Most families use double-layer curtains. In order to improve the comfort, the present invention can also be designed as a double-layer structure. Refer to Figure 1 as another preferred embodiment of the present invention. The difference from Embodiment 1 is that the two A second sliding round rod 17 is fixedly welded between the two fixed plates 2, and a second round rod 28 is rotatably connected between the two second fixed plates 2 through bearings. The second round rod 28 is provided with two sections of threads in opposite directions. In the second threaded groove 35, a transmission mechanism is provided between the round rod 3 and the second round rod 28. The transmission mechanism includes a synchronous pulley 36 fixedly provided on the outer walls of the round rod 3 and the second round rod 28. Two synchronous pulleys A synchronous belt 37 is set between 36. Under the action of the synchronous pulley 36 and the synchronous belt 37, the second round rod 28 rotates synchronously with the round rod 3, and a plurality of hanging rings 24 are set on the second sliding round rod 17. , a second translation block 18 is provided outside the second sliding round rod 17 and the second round rod 28. The second translation block 18 is threadedly connected to the second threaded groove 35 on the second round rod 28. The second translation block 18 is connected with the second threaded groove 35 on the second round rod 28. The second sliding round rods 17 are slidingly connected, and the self-locking ring hook 25 is fixedly connected to the bottom end of the second translation block 18. When the round rod 3 rotates, the second round rod 28 follows the round rod 3 under the action of the transmission mechanism. Rotate synchronously, the second translation block 18 and the second round rod 28 are threadedly connected, and the second translation block 18 is limited by the second sliding round rod 17, and the two second translation blocks 18 are on the round rod 3 Performing opposite or back-to-back movements, the gauze is suspended on the second sliding round rod 17 under the action of the self-locking ring hook 25 and the hanging ring 24, and the moving end of the gauze is fixedly connected to the second translation rod under the action of the self-locking ring hook 25. On the block 18, the fixed end of the curtain is fixed on the second fixed plate 2, and the moving ends of the two pieces of gauze follow the two second translation blocks 18 to move toward or back to realize the opening and closing of the gauze.

Example 3

In Embodiment 2, although a layer of gauze is provided inside the cloth layer, when the round rod 3 rotates, the second round rod 28 always rotates with the round rod 3, which causes the cloth layer and the gauze to move in opposite or backward directions at the same time. , the cloth layer and the gauze cannot move separately. Refer to Figures 6 and 7. As another preferred embodiment of the present invention, the difference from Embodiment 1 is that between the first translation block 7 and the round rod 3 and the second translation block 18 A limiting mechanism is provided between the second circular rod 28 and the limiting mechanism. The limiting mechanism includes a circular ring 6 that is rotated inside the first translation block 7 and the second translation block 18. The circular ring 6 is threadedly connected to the circular rod 3 and the second translation block 18 respectively. On the round rod 28, when the ring 6 is limited in the first translation block 7 and the second translation block 18, the round rod 3 and the second round rod 28 rotate. At this time, the first translation block 7 and the second translation block 18 is displaced; when the ring 6 is not limited in the first translation block 7 and the second translation block 18, the round rod 3 and the second round rod 28 rotate, and at this time the ring 6 follows the rotation and causes the first translation block 7 and the second translation block 18 will not be displaced. A limiting groove 19 is provided on the outer wall of the ring 6 where the first translation block 7 and the second translation block 18 are connected. The first translation block 7 and the second translation block 18 are in contact with each other. A groove 20 is provided on the connecting inner wall of the ring 6, and a blocking block 21 is slidably provided in the groove 20. The blocking block 21 is made of magnetic material, and a resisting block is fixedly connected between the blocking block 21 and the groove 20. The spring 22 has a second electromagnet 23 fixed at the bottom of the groove 20 and located inside the compression spring 22. The clamp 21 can be inserted into the limiting groove 19 under the elastic force of the compression spring 22. When the second When the electromagnet 23 is not energized, the pressing spring 23 presses the clamping block 21 and inserts it into the limiting groove 19 on the ring 6. At this time, the ring 6 is formed in the first translation block 7 and the second translation block 18. Limiting relationship, when the round rod 3 and the second round rod 28 rotate, the first translation block 7 and the second translation block 18 can be controlled to move; when the second electromagnet 23 is energized, the second electromagnet 23 absorbs the block 21 enters the groove 20. At this time, the ring 6 does not form a limiting relationship in the first translation block 7 and the second translation block 18. When the round rod 3 and the second round rod 28 rotate, the first round rod cannot be controlled. The translation block 7 and the second translation block 18 move.

In use, when controlling the gauze hanging on the second sliding round rod 17, press the corresponding operation button on the remote control to send the operation command to the processor. The processor receives the signal and controls the second translation block 18. The second electromagnet 23 in the first translation block 7 is disconnected, the second electromagnet 23 in the first translation block 7 passes and the motor 8 rotates, and the pressing spring 22 in the second translation block 18 is pressed when the second electromagnet 23 is disconnected. The clamping block 21 is pressed against the ring 6. The second electromagnet 23 in the first translation block 7 attracts the clamping block 21 into the groove 20 when there is a passage. The motor 8 controls the round rod under the action of the connecting mechanism. 3 rotates, the second round rod 28 rotates synchronously with the round rod 3 under the action of the transmission mechanism. The rotation of the round rod 3 and the second round rod 28 drives the ring 6 in the first translation block 7 and the second translation block 18 to rotate. During the rotation of the ring 6 in the second translation block 18, the clamping block 21 presses into the limiting groove 19 on the outer wall of the ring 6. At this time, the ring 6 in the second translation block 18 and the second translation block There is a limit between 18. When the second round rod 28 in the second translation block 18 continues to rotate, the second translation block 18 begins to displace, and the ring 6 in the first translation block 7 is in contact with the first translation block 7. There is no limiting relationship between the first translation block 7 and the first translation block 7 cannot be displaced.

When controlling the cloth layer suspended on the first sliding rod 5, press the corresponding operation button on the remote control to send the operation command to the processor. The processor receives the signal and controls the first translation block 7. The second electromagnet 23 is disconnected, the second electromagnet 23 passage in the second translation block 18 and the motor 8 rotate, and the pressing spring 22 in the first translation block 7 presses against the card when the second electromagnet 23 is disconnected. The block 21 is pressed against the ring 6. The second electromagnet 23 in the second translation block 18 attracts the block 21 into the groove 20 under the condition of passage. The motor 8 controls the round rod 3 under the action of the connecting mechanism. Rotate, the second round rod 28 rotates synchronously with the round rod 3 under the action of the transmission mechanism. The rotation of the round rod 3 and the second round rod 28 drives the ring 6 in the first translation block 7 and the second translation block 18 to rotate. During the rotation of the ring 6 in a translation block 7, the clamping block 21 presses into the limiting groove 19 on the outer wall of the ring 6. At this time, the ring 6 in the first translation block 7 and the first translation block 7 There is a limit between them. When the round rod 3 in the first translation block 7 continues to rotate, the first translation block 7 begins to displace, and the gap between the ring 6 in the second translation block 18 and the second translation block 18 Without a limiting relationship, the second translation block 18 cannot be displaced.

Example 4

Existing electric curtains usually use hooks when hanging fabrics. Although the hooks are convenient for hanging, two adjacent hooks are easy to cross, causing the curtains to be unable to be fully unfolded. Refer to Figure 8 as another preferred embodiment of the present invention. The difference between 1 and 1 is that the hanging ring 24 includes a first arc-shaped ring 26 and a second arc-shaped ring 27. The first arc-shaped ring 26 and the second arc-shaped ring 27 are fixedly welded end to end. The cross-sectional diameter of the second arc-shaped ring 27 is smaller than The cross-sectional diameter of the first arc-shaped ring 26 is set on the second arc-shaped ring 27 with a plurality of balls 29 arranged side by side, and the hanging ring 24 is set on the outside of the first sliding round rod 5 and the second sliding round rod 17 , and the setting of the ball 29 reduces the friction between the hanging ring 24 and the two sliding round rods, thereby facilitating the movement of the hanging ring 24 on the two sliding round rods. The first arc-shaped ring 26 is fixedly welded with a self-locking Ring 30. The self-locking ring 30 includes a first connecting rod 31 and a second connecting rod 32 fixedly welded on the first arc-shaped ring 26. The end of the first connecting rod 31 away from the first arc-shaped ring 26 is rotatably connected with a third connecting rod. The connecting rod 33 is provided with a torsion spring between the third connecting rod 33 and the first connecting rod 31. The end of the third connecting rod 33 away from the first connecting rod 31 is away from the second connecting rod 32 under the action of the torsion spring. One end of the first arc-shaped ring 26 is in pressing contact. The self-locking ring 30 is always in a closed state in its natural state, and under the gravity of the self-locking ring 30, the ball 29 can always offset the tops of the two sliding rods. The self-locking ring 30 is used for hanging curtains. Since both the hanging ring 24 and the self-locking ring 30 are fully enclosed structures, there will be no cross-winding problem between two adjacent hooks in the prior art.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides an electric window curtain, includes first fixed plate (1) and second fixed plate (2), its characterized in that, the quantity of first fixed plate (1) and second fixed plate (2) is two, two first fixed plate (1) are fixed on the wall through long screw, two second fixed plate (2) fixed connection is on first fixed plate (1), two be connected with round bar (3) through the bearing rotation between second fixed plate (2), set up two sections screw thread groove (4) that the screw thread direction is opposite on round bar (3), two fixed welding has first slip round bar (5) between second fixed plate (2), first slip round bar (5) and round bar (3) parallel arrangement, the cover is equipped with a plurality of link (24) on first slip round bar (5), the outside of round bar (3) and first slip round bar (5) is provided with first translation piece (7), set up thread groove (4) opposite to two on round bar (3) on first translation piece (3) and one of them translation piece (7) are connected with one of them fixed connection round bar (7) through screw thread groove (25) on second fixed plate (2), the connecting mechanism comprises a first fastener (9) fixedly welded at the output end of the motor (8), one end of the round rod (3) penetrates through a second fixing plate (2) where the motor (8) is located, a second fastener (10) is slidably arranged on the outer wall of the round rod (3), the first fastener (9) can be connected with the second fastener (10) in a clamping mode, a sliding groove (11) is formed in the outer wall of the round rod (3), a sliding block (12) fixedly connected with the second fastener (10) is arranged in the sliding groove (11) in a sliding mode, the sliding block (12) is made of a magnetic material, a first electromagnet (13) is fixedly arranged at one end, close to the motor (8), of the sliding groove (11), a connecting rod (34) is fixedly welded on the outer wall of the round rod (3), a contraction spring (14) is fixedly connected between the connecting rod (34) and the second fastener (10), a ring-shaped clamping groove (15) is formed in the outer wall of the second fastener (10), and a pull rope (16) is arranged in the ring-shaped groove (15).

A second sliding round rod (17) is fixedly welded between the two second fixing plates (2), a second round rod (28) is rotatably connected between the two second fixing plates (2) through a bearing, two sections of second thread grooves (35) with opposite thread directions are formed in the second round rod (28), a transmission mechanism is arranged between the round rod (3) and the second round rod (28), a plurality of hanging rings (24) are sleeved on the second sliding round rod (17), second translation blocks (18) are arranged outside the second sliding round rod (17) and the second round rod (28), the second translation blocks (18) are in threaded connection with the second thread grooves (35) in the second round rod (28), the second translation blocks (18) are in sliding connection with the second sliding round rod (17), self-locking rings (25) are fixedly connected to the bottom ends of the second translation blocks (18), and limit mechanisms are arranged between the first translation blocks (7) and the round rod (3) and the second translation blocks (18);

the limiting mechanism comprises a circular ring (6) which is arranged inside a first translation block (7) and a second translation block (18) in a rotating mode, the circular ring (6) is connected to a round rod (3) and a second round rod (28) in a threaded mode, a limiting groove (19) is formed in the outer wall, connected with the first translation block (7) and the second translation block (18), of the circular ring (6), a groove (20) is formed in the inner wall, connected with the circular ring (6), of the first translation block (7) and the second translation block (18), a clamping block (21) is arranged in the groove (20) in a sliding mode, the clamping block (21) is made of a magnetic material, a pressing spring (22) is fixedly connected between the clamping block (21) and the groove (20), a second electromagnet (23) is fixedly arranged at the bottommost part of the groove (20) and located in the pressing spring (22), and the clamping block (21) can be inserted into the limiting groove (19) under the elastic action of the pressing spring (22).

2. A motorized window treatment according to claim 1, characterized in that the rod (3) is arranged outside the output of the motor (8), and a bearing is arranged between the rod (3) and the output of the motor (8).

3. A motorized window treatment according to claim 1, characterized in that the transmission comprises a synchronous pulley (36) fixedly arranged on the outer walls of the round bar (3) and the second round bar (28), a synchronous belt (37) being fitted between the two synchronous pulleys (36).

4. A motorized window treatment according to claim 1, characterized in that a reinforcing rib is fixedly welded between the second fixing plate (2) and the first fixing plate (1).