WO2024027263A1

WO2024027263A1 - Dual-rail dual-control linked limiter for day and night blinds

Info

Publication number: WO2024027263A1
Application number: PCT/CN2023/093519
Authority: WO
Inventors: 邱永忠
Original assignee: 广州市珏饰窗饰科技有限公司
Priority date: 2022-08-04
Filing date: 2023-05-11
Publication date: 2024-02-08
Also published as: CN115370278A

Abstract

Disclosed in the present invention is a dual-rail dual-control linked limiter for day and night blinds, comprising a limiting seat, a lowering stop block, a raising stop block, a primary screen shaft, a main gear, a secondary screw shaft, and an auxiliary gear. The main gear is meshed with the auxiliary gear. A lowering stop protrusion is provided on the primary screen shaft. A raising stop protrusion and a synchronous linkage protrusion are provided on the secondary screw shaft. A synchronous linkage spur block is provided on an end surface of the auxiliary gear and spurs the synchronous linkage protrusion, so that an auxiliary mandrel rotates synchronously with a main mandrel. The limiter of the present patent adopts the technical solution above, in which dual-rail dual-control linked limiting control is achieved. When a blind bottom track moves up and pushes a blind top track up, causing a raising/lowering cord of a blind top track raising/lowering winder losing the gravity of the blind top track, the two tracks are synchronously linked by means of the limiter, so that the problems that the raising/lowering cord of the top track raising/lowering winder is loosened and arranged out of order are thoroughly solved, and operation of the day and night blinds is safer and more reliable.

Description

A day and night curtain dual-track dual-control associated limiter

Technical field

The invention relates to the technical field of curtains, and in particular to a limiter for day and night curtains.

Background technique

Existing accordion curtains, pleated curtains, venetian blinds, and day and night curtains all have stacked curtains, and the curtains are the curtains used to lift and block sunlight; organ curtains, pleated curtains, venetian blinds, and day and night curtains are all curtains. The bottom end of the curtain can be raised or lowered to adjust the blocking position, but the top of the curtain with this structure is always blocked. The top of the curtain cannot be raised or moved down, which cannot meet the user's needs and has a single control method.

In order to solve the above problems, the State Intellectual Property Office published a patent document with the publication number CN213450157 U on June 15, 2021. It disclosed a dual-track dual-control curtain, including a first guide rail, a second guide rail, and a first control curtain. mechanism, a second control mechanism and a curtain main body, the first control mechanism is arranged on the first guide rail, the second control mechanism is arranged on the second guide rail, the first guide rail and the second guide rail are arranged up and down, the The first control mechanism is provided with a first rope reel and a plurality of first rope reels that move synchronously. One end of the first rope reel is connected to the first rope reel, and the other end passes through the second guide rail and is connected to the curtain body. The upper end or the lower end is connected to control the upper or lower end of the curtain body to move up and down. The second guide rail is provided with a second rope winding device and a second rope winding device. One end of the second winding rope is connected to the second rope winding device and the other end is connected to the second rope winding device. It is connected to the lower end or upper end of the curtain main body to control the up and down movement of the lower end or upper end of the curtain main body by forming upper and lower guide rails, and the upper and lower guide rails are respectively provided with a first control mechanism connected to the upper end of the curtain main body and a second control mechanism connected to the lower end of the curtain main body. The mechanism realizes simultaneous control of the upper and lower ends of the curtain body, allowing the curtain to hover at different heights. The left making head is provided with a first axis, the first axis connects the first limiter and a plurality of first rope reels in series, and the first axis drives the first limiter and the first rope reel. The device moves to form the transmission control of the first control mechanism. The right control head is provided with a second axis, the second axis is connected in series with the second limiter and a plurality of second rope reels, and the second axis drives the second limiter and the second rope reel. The machine moves to form the transmission control of the second control mechanism.

It can be seen that the above-mentioned patent document adopts a dual-rail dual-control method with two limiters, using two independent limiters. During the operation process, they cannot play a role in limiting the stroke of each other. When the bottom rail of the curtain body is When the top rail of the curtain body is propped up so that the lifting rope of the lifting reel of the top rail of the curtain body loses the gravity of the top rail of the curtain body, if the bottom rail of the curtain body continues to move upward, the lifting rope of the top rail lifting reel of the curtain body will The lifting rope will become loose, which will easily cause the rope arrangement of the top rail lifting reel on the day and night curtains to be disordered, causing the day and night curtains to malfunction and affecting the normal use of the day and night curtains.

Therefore, in order to solve the problem of slackening of the lifting rope of the top rail lifting reel and confusion of the rope arrangement, research on a limiter that can correlate and synchronize the movement of the double rails is an urgent problem that needs to be solved in current day and night curtain products.

Contents of the invention

The object of the present invention is to provide a day and night curtain dual-rail dual-control associated limiter that can realize dual-rail linkage to solve the problems of slack rope lifting and chaotic rope arrangement of the top rail lifting reel.

In order to solve the above technical problems, the technical solution adopted by the present invention is:

A day and night curtain dual-track dual-control associated limiter, including a limit seat, a downward stop block, an upward stop block, a main screw, a main gear, an auxiliary screw and an auxiliary gear. The side wall of the limit seat There is a main thread through hole and an auxiliary thread through hole on the main screw. One end of the main screw is inserted into the main thread through hole and is threadedly connected with the main thread through hole. The main gear is fixedly installed on the main screw. There is a main screw inside the main screw. Through hole, the main through hole is inserted into the main spindle of the curtain body bottom rail lifting reel and the main screw can slide along the main spindle. The main gear meshes with the auxiliary gear, and the auxiliary gear is provided with a threaded through hole. The auxiliary gear is inserted into the auxiliary screw through a threaded through hole and is threadedly connected to the auxiliary screw. One end of the auxiliary screw is inserted into the auxiliary threaded through hole and is threadedly connected to the auxiliary threaded through hole. The auxiliary screw is provided with an auxiliary through hole. The through hole is inserted into the auxiliary mandrel that drives the lifting reel of the top rail of the curtain body, and the auxiliary screw can slide along the auxiliary mandrel; the main screw is provided with a downward stop protrusion, and when the main mandrel drives the bottom rail of the curtain body to move downward At the same time, the main screw is driven to rotate, and the fixed limit seat causes the main screw threaded with it to slide along the main mandrel. The main screw drives the main gear to rotate and move at the same time. The main gear drives the auxiliary gear to rotate, and the auxiliary gear moves along the The auxiliary screw moves synchronously with the main gear, and the downward stop protrusion moves together with the main screw. When the bottom rail of the curtain body moves down to the lowest position, the downward stop stop block blocks the downward stop protrusion to prevent The main screw and the main mandrel continue to rotate; the other end of the auxiliary screw is provided with an upward stop protrusion and a synchronous linkage protrusion, and the end face of the auxiliary gear is provided with a synchronous linkage dial. When the main mandrel drives the bottom of the curtain body When the rail moves up, it drives the main screw to rotate in the opposite direction at the same time. The fixed limit seat causes the main screw threaded with it to slide in the opposite direction along the main mandrel. The main screw drives the main gear to rotate and move in the opposite direction at the same time. , the main gear drives the auxiliary gear to rotate in the opposite direction. The auxiliary gear moves in the reverse direction synchronously with the main gear along the auxiliary screw. The synchronous linkage block moves with the auxiliary gear. When the lifting rope of the curtain body top rail lifting reel loses the curtain body top When the gravity of the rail is exerted, the synchronous linkage dial contacts the synchronous linkage protrusion and turns the synchronous linkage protrusion to drive the auxiliary screw to rotate synchronously with the auxiliary gear. The auxiliary screw drives the auxiliary mandrel, so that the auxiliary mandrel rotates synchronously with the main mandrel. , the fixed limit seat causes the auxiliary screw threaded with it to slide along the auxiliary mandrel, and the upward stop protrusion moves together with the auxiliary screw. When the top rail of the curtain body moves up to the top position, the upper stop The travel stop block blocks the upward stop protrusion to prevent the auxiliary mandrel and the main mandrel from continuing to rotate.

Further, the downward stop block is provided on the side wall of the limiting seat.

Further, it also includes a packaging box, with an insertion hole on one end face of the packaging box, a main mandrel passage opening and an auxiliary mandrel passage opening on the other end face of the packaging box, and an insertion hole is provided on the limiter seat. The joint and the limit seat are arranged in the packaging box and the plug connector is plugged into the insertion hole. The main gear, auxiliary gear and upward stopper are arranged in the packaging box.

Further, the packaging box includes an upper box body and a lower box body. The upper box body is provided with hooks on both sides of the bottom, and the lower box body is provided with clamping slots on both sides of the top. The hooks are connected to the corresponding slots. , the upper box body and the lower box body are snapped together, and the upward stopper is located on the bottom surface of the lower box body and close to one end of the packaging box that is provided with the main mandrel passing opening and the auxiliary mandrel passing opening. .

Further, a main rotating sliding sleeve is provided at the main spindle passing opening, and the main spindle passes through the non-circular through hole of the main rotating sliding sleeve; an auxiliary rotating sliding sleeve is provided at the auxiliary mandrel passing opening. Sliding sleeve, the auxiliary mandrel passes through the non-circular through hole of the auxiliary rotating sliding sleeve.

Furthermore, guide positioning plates are provided at the bottoms of both sides of the upper box body and between the two hooks, and the tops of both sides of the lower box body are located between the two hooks. A guide positioning slot is provided, and a guide positioning plate is located in the guide positioning slot to align the hook with the slot.

Further, the bottom surface of the limit seat is provided with two plug-in blocks and jack holes, the plug holes are located between the two plug-in blocks, and the bottom surface of the lower box body is provided with two slots and Plug-in post, the two plug-in blocks are plugged into the slot, and the plug-in post is plugged into the socket to fix the limit seat on the bottom surface of the limit seat.

Further, the other end of the main screw is a D-shaped shaft. A boss is provided on the D-shaped shaft and close to the external thread of the main screw. The downward stop protrusion is provided on the side wall of the boss, so One end of the main gear is provided with a fixed sleeve. The main gear and the fixed sleeve are integrally formed. The through hole of the fixed sleeve is a D-shaped hole that matches the D-shaped shaft. The fixed sleeve is inserted into the D-shaped shaft.

Further, the fixed sleeve has a fixing hole, and a screw passes through the fixing hole and is threadedly connected to the D-shaped shaft to fix the main gear.

Further, a debugging observation window is provided on the surface of the upper box body.

The beneficial effects of the present invention are:

The limiter of this patent adopts the above-mentioned technical solution to realize the associative limit control of dual-rail and dual-control. When the lifting rope of the curtain body top rail lifting reel loses the gravity of the curtain body top rail, the limiter is used to The dual rails realize synchronous linkage, thus completely solving the problems of slack lifting rope and chaotic rope arrangement of the top rail lifting reel, making the operation of day and night curtains safer and more reliable;

Since the two rails share a limiter, the components of the day and night curtains are simplified and the cost is reduced;

This patented limiter has only one shell, two screws and two gears. It has the characteristics of simple and compact structure, convenient installation, long service life and safe and reliable operation.

This patented limiter also has the function of limiting the upward and downward strokes of the curtain body, which greatly improves operational safety.

The use of this limiter allows the dual-track and dual-control day and night curtains to retain their original functions. It can also control the upper and lower ends of the curtain body, so that the curtains can hover at different heights, and not only can the shading be adjusted Any height below the hovering position, and the size of the blocking area above the upper end of the curtain body can also be adjusted. The position and height of the curtain can be adjusted according to different lighting positions to form a double-opening or single-sided curtain. Compared with the existing bottom Opening and lifting curtains are more flexible in control and easier to operate.

Description of the drawings

The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, without exerting creative efforts, other embodiments can be obtained based on the following drawings. Attached pictures:

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is the exploded view shown in Figure 1;

Figure 3 is a schematic structural diagram of the limiting seat shown in Figure 1;

Figure 4 is a side view of the side view shown in Figure 3;

Figure 5 is a bottom view shown in Figure 3;

Figure 6 is a schematic structural diagram of the lower box shown in Figure 2;

Figure 7 is a schematic structural diagram of the main gear shown in Figure 2;

Figure 8 is a schematic structural diagram of the auxiliary gear shown in Figure 2;

Figure 9 is a schematic structural diagram of the main screw shown in Figure 2;

Figure 10 is a schematic structural diagram of the auxiliary screw shown in Figure 2.

In the picture: 1. Limit seat; 2. Downward stop block; 3. Upward stop block; 4. Main screw; 5. Main gear; 6. Auxiliary screw; 7. Auxiliary gear; 8. Packaging box; 9. Upper box body; 10. Lower box body; 11. Hook; 12. Card slot; 13. Main mandrel passage; 14. Auxiliary mandrel passage; 15. Main rotating sliding sleeve; 16. Main mandrel ; 17. Auxiliary rotating sliding sleeve; 18. Auxiliary mandrel; 19. Plug-in hole; 20. Plug-in joint; 21. Main threaded through hole; 22. Auxiliary threaded through hole; 23. Main through hole; 24. Threaded through hole ; 25. Auxiliary through hole; 26. Downward stop protrusion; 27. D-shaped shaft; 28. Boss; 29. Fixed sleeve; 30. D-shaped hole; 31. Upward stop protrusion; 32. Synchronous linkage protrusion from; 33. Synchronous linkage dial; 34. Guide positioning plate; 35. Guide positioning groove; 36. Plug-in block; 37. Jack; 38. Slot; 39. Plug-in column; 40. Weightless clutch; 41. Debug viewing window.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in further detail below in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application Features of the embodiments can be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal direction", "transverse direction", "length", "width", "thickness", "upper surface", "lower surface", "front" , "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Forward", "Reverse", "Axis" ", "radial direction", "circumferential direction", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the device referred to. Or elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations on the invention.

As shown in Figures 1 and 2, a day and night curtain dual-track dual-control associated limiter includes a limit seat 1, a downward stop block 2, an upward stop block 3, a main screw 4, a main gear 5, an auxiliary Screw 6, auxiliary gear 7 and packaging box 8, the downward stop 2 is provided on the side wall of the limit seat 1, the main gear 5, auxiliary gear 7 and the upward stop 3 are provided on the packaging box Within 8.

The packaging box 8 includes an upper box body 9 and a lower box body 10. The upper box body 9 is provided with hooks 11 on both sides of the bottom, and the lower box body 10 is provided with clamping slots 12 on both sides of the top. The hooks 11 are connected to the corresponding In the card slot 12, the upper box body 9 and the lower box body 10 are clamped together.

An insertion hole 19 is provided on one end face of the packaging box 8. The other end face of the packaging box 8 is provided with the main mandrel passage opening 13 and the auxiliary mandrel passage opening 14. The upward stopper 3 One end of the bottom of the lower box body 10 and close to the packaging box is provided with a main spindle passage 13 and an auxiliary spindle passage 14. The main spindle passage 13 is provided with a main rotating sliding sleeve 15. The main core The shaft 16 passes through the non-circular through hole of the main rotating sliding sleeve 15, and the main rotating sliding sleeve 15 rotates together with the main spindle 16; the auxiliary rotating sliding sleeve 17 is provided at the auxiliary spindle passing opening 14, and the auxiliary core The shaft 18 passes through the non-circular through hole of the auxiliary rotating sliding sleeve 17, and the auxiliary rotating sliding sleeve 17 rotates together with the auxiliary spindle 18.

As shown in Figure 2, the limiting seat 1 is provided with a plug connector 20. The limiting seat 1 is located in the packaging box 8 and the plug connector 20 is plugged into the plug hole 19.

As shown in Figures 3, 4, 5 and 6, the side wall of the limit seat 1 is provided with a main threaded through hole 21 and an auxiliary threaded through hole 22, and the bottom surface of the limit seat 1 is provided with two plug-in blocks 36 and The jack 37 is located between the two plug blocks 36. The bottom surface of the lower box body 10 is provided with two slots 38 and plug posts 39. The two plug blocks 36 are plugged into each other. In the slot 38, the plug post 39 is plugged into the socket 37, thereby fixing the limiting seat 1.

One end of the main screw 4 is inserted into the main threaded through hole 21 and is threadedly connected to the main threaded through hole 21. The main gear 5 is fixedly installed on the main screw 4. The main screw 4 is provided with a main through hole 23. The main through hole 23 is interspersed on the main spindle 16 that drives the curtain body bottom rail lifting reel and the main screw 4 can slide along the main spindle 16. The main gear 5 meshes with the auxiliary gear 7, and the auxiliary gear 7 is provided with a threaded through hole. 24. The auxiliary gear 7 is inserted into the auxiliary screw 6 through the threaded through hole 24 and is threadedly connected to the auxiliary screw 6. One end of the auxiliary screw 6 is inserted into the auxiliary threaded through hole 22 and is threadedly connected to the auxiliary threaded through hole 22. An auxiliary through hole 25 is provided in the screw rod 6. The auxiliary through hole 25 is inserted into the auxiliary mandrel 18 of the curtain body top rail lifting reel and the auxiliary screw rod 6 can slide along the auxiliary mandrel 18.

The cross-sections of the auxiliary mandrel 18 and the main mandrel 16 are non-circular structures, and the auxiliary through hole 25 and the main through hole 23 are also non-circular structures. This design is to make the main screw 4 and the auxiliary screw 6 respectively The auxiliary mandrels 18 rotate together to prevent relative sliding.

As shown in Figures 7, 8, 9, and 10, the main screw 4 is provided with a downward stop protrusion 26. Specifically, the other end of the main screw 4 is a D-shaped shaft 27, and the D-shaped shaft 27 is A boss 28 is provided near the external thread of the main screw 4. The downward stop boss 26 is provided on the side wall of the boss 28. One end of the main gear 5 is provided with a fixed sleeve 29. The main gear 5 It is integrally formed with the fixed sleeve 29. The through hole of the fixed sleeve 29 is a D-shaped hole 30. The fixed sleeve 29 is inserted into the D-shaped shaft 27 and fixed with screws.

When the main mandrel 16 drives the bottom rail of the curtain body to move downward, it also drives the main screw 4 to rotate. The fixed limit seat 1 causes the main screw 4 threadedly connected with it to slide along the main mandrel 16, and the main screw 4 drives the main screw 4. The gear 5 rotates and moves at the same time. The main gear 5 drives the auxiliary gear 7 to rotate. The auxiliary gear 7 moves synchronously with the main gear 5 along the auxiliary screw 6. The downward stop protrusion 26 moves together with the main screw 4. When the bottom rail of the curtain body is lowered When moving to the lowest position, the downward stop block 2 blocks the downward stop protrusion 26 to prevent the main screw 4 and the main spindle 16 from continuing to rotate; the other end of the auxiliary screw 6 is provided with an upward stop protrusion 31 and a synchronization The linkage protrusion 32 and the end surface of the auxiliary gear 7 are provided with a synchronous linkage dial 33. When the main mandrel 16 drives the bottom rail of the curtain body to move upward, it also drives the main screw 4 to rotate in the opposite direction, and the fixed limit seat 1. Make the main screw 4 threaded with it slide in the reverse direction along the main spindle 16. The main screw 4 drives the main gear 5 to rotate and move in the opposite direction at the same time. The main gear 5 drives the auxiliary gear 7 to rotate in the opposite direction. The auxiliary gear 7 Along the auxiliary screw 6 and the main gear 5 synchronously and reversely move, the synchronous linkage dial 33 moves together with the auxiliary gear 7. When the bottom rail of the curtain body moves up, the top rail of the curtain body is propped up, so that the top rail of the curtain body can be raised and lowered to wind the wire. When the lifting rope of the device loses the gravity of the top rail of the curtain body, the synchronous linkage dial 33 contacts the synchronous linkage protrusion 32 and dials the synchronous linkage protrusion 32 to drive the auxiliary screw 6 to rotate synchronously with the auxiliary gear 7, and the auxiliary screw 6 drives the The auxiliary mandrel 18 makes the auxiliary mandrel 18 move synchronously with the main mandrel 16, so that the curtain body bottom rail and the curtain body top rail move upward synchronously, thus avoiding the need for the curtain body top rail to be propped up. The lifting rope on the lifting reel is loose and the line is messed up.

The fixed limit seat 1 causes the auxiliary screw 6 threadedly connected with it to slide along the auxiliary mandrel 18, and the upward stop protrusion 31 moves together with the auxiliary screw 6. When the top rail of the curtain body moves up to the top position, The upward stopper 3 blocks the upward stopper protrusion 31 to prevent the auxiliary spindle 18 and the main spindle 16 from continuing to rotate.

As shown in Figure 2, guide positioning plates 34 are provided at the bottoms on both sides of the upper box body 9 and between the two hooks 11. The tops on both sides of the lower box body 10 are between the two hooks 11. A guide positioning groove 35 is provided between the card slots 12 , and a guide positioning plate 34 is located in the guide positioning groove 35 to align the hook 11 with the card slot 12 .

It also includes a weightless clutch 40. The weightless clutch 40 is used to connect the auxiliary mandrel 18 and the auxiliary head (not shown in the figure). When the bottom rail of the curtain body moves upward, the top rail of the curtain body is propped up, so that the curtain body is lifted up. When the lifting rope of the rail lifting reel loses the gravity of the top rail of the curtain body, the weightless clutch 40 disengages the auxiliary mandrel 18 and the auxiliary head. At this time, the power of the auxiliary mandrel 18 comes from the main mandrel 16, and also That is to say, the final power comes from the main control head. After being disengaged, the auxiliary mandrel 18 is no longer restricted by the auxiliary control head; when the lifting rope of the curtain body top rail lifting reel is again affected by the gravity of the curtain body top rail When the weightless clutch 40 is reset, the auxiliary mandrel 18 and the auxiliary head are connected together again.

The auxiliary mandrel 18 and the main mandrel 16 rotate synchronously. The auxiliary mandrel 18 drives the curtain body top rail lifting reel to start winding the lifting rope synchronously. The purpose is to make the curtain body bottom rail and the curtain body top rail move upward simultaneously to prevent the lifting rope. Chaos lines appear.

A debugging observation window 41 is provided on the surface of the upper box body 9 to facilitate observation of the position of the limiter during debugging, thereby facilitating debugging.

Working principle: The limiter of this patent is installed on the auxiliary mandrel and the main mandrel at the same time, that is to say, it is installed on the dual rails at the same time, realizing the associated limit control of the dual rails and dual control, while controlling the main mandrel. , the auxiliary mandrel is also controlled in real time. When the lifting rope of the curtain body top rail lifting reel loses the gravity of the curtain body top rail, the two rails are synchronously linked through the limiter, thus completely solving the problem of top rail lifting. The reel's lifting rope is loose and the rope arrangement is disordered. In addition, the biggest advantage of this limiter is that it simplifies the debugging difficulty of the material day and night curtains. The lifting rope acting on the bottom rail and top rail does not need to pass through the upper rail (installation box), which greatly improves the debugging efficiency.

The auxiliary mandrel is used to adjust the size of the blocking area above the upper end of the curtain main body, while the main mandrel is used to adjust the height of the blocking area below the hovering position. The lower part of the curtain can be fully closed or partially opened, and it can also be adjusted The size of the open area.

Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other. Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

Claims

A day and night curtain dual-track dual-control associated limiter, which is characterized by: including a limit seat, a downward stop block, an upward stop block, a main screw, a main gear, an auxiliary screw and an auxiliary gear. The limiter The side wall of the seat is provided with a main thread through hole and an auxiliary thread through hole. One end of the main screw is inserted into the main thread through hole and is threadedly connected to the main thread through hole. The main gear is fixedly installed on the main screw. The main screw There is a main through hole inside. The main through hole is inserted into the main spindle of the curtain body bottom rail lifting reel and the main screw can slide along the main spindle. The main gear meshes with the auxiliary gear, and there is a auxiliary gear on the auxiliary gear. Threaded through hole, the auxiliary gear is inserted into the auxiliary screw through the threaded through hole and is threadedly connected with the auxiliary screw. One end of the auxiliary screw is inserted into the auxiliary threaded through hole and is threadedly connected with the auxiliary threaded through hole. There is an auxiliary screw inside the auxiliary screw. The through hole and the auxiliary through hole are inserted into the auxiliary mandrel that drives the curtain body top rail lifting reel and the auxiliary screw can slide along the auxiliary mandrel; the main screw is provided with a downward stop protrusion. When the main mandrel drives the curtain body When the bottom rail moves down, it drives the main screw to rotate at the same time. The fixed limit seat causes the main screw threaded with it to slide along the main mandrel. The main screw drives the main gear to rotate and move at the same time, and the main gear drives the auxiliary gear to rotate. , the auxiliary gear moves synchronously with the main gear along the auxiliary screw, and the downward stop protrusion moves together with the main screw. When the bottom rail of the curtain body moves down to the lowest position, the downward stop stop blocks the downward stop protrusion. Block to prevent the main screw and the main mandrel from continuing to rotate; the other end of the auxiliary screw is provided with an upward stop protrusion and a synchronous linkage protrusion, and the end face of the auxiliary gear is provided with a synchronous linkage dial. When the main mandrel When the bottom rail of the curtain body is driven to move upward, the main screw is driven to rotate in the opposite direction at the same time. The fixed limit seat causes the main screw threaded with it to slide in the opposite direction along the main mandrel. The main screw drives the main gear to rotate in the opposite direction at the same time. and reverse movement. The main gear drives the auxiliary gear to rotate in the opposite direction. The auxiliary gear moves in the reverse direction synchronously with the main gear along the auxiliary screw. The synchronous linkage block moves with the auxiliary gear. When the top rail of the curtain body lifts and lowers the lifting rope of the reel, When the gravity of the top rail of the curtain body is lost, the synchronous linkage dial contacts the synchronous linkage protrusion and stirs the synchronous linkage protrusion to drive the auxiliary screw to rotate synchronously with the auxiliary gear. The auxiliary screw drives the auxiliary mandrel so that the auxiliary mandrel follows the main shaft. The mandrel rotates synchronously, and the fixed limit seat causes the auxiliary screw threaded with it to slide along the auxiliary mandrel. The upward stop protrusion moves together with the auxiliary screw. When the top rail of the curtain body moves up to the top position, The upward stop block blocks the upward stop protrusion to prevent the auxiliary spindle and the main spindle from continuing to rotate.
The day and night curtain dual-track dual-control associated limiter according to claim 1, characterized in that: the downward stop block is provided on the side wall of the limit seat.
The day and night curtain dual-track dual-control associated limiter according to claim 1, characterized in that it also includes a packaging box, an insertion hole on one end of the packaging box, and a main core on the other end of the packaging box. The shaft passing through port and the auxiliary mandrel passing through port, the limiting seat is provided with a plug joint, the limiting seat is arranged in the packaging box and the plug joint is plugged into the plug hole, the main gear, the auxiliary gear and the upper The stopper is arranged in the packaging box.
The day and night curtain dual-track dual-control associated limiter according to claim 3, characterized in that: the packaging box includes an upper box body and a lower box body, the upper box body is provided with hooks on both sides of the bottom, and the lower box body There are card slots on the top of both sides of the body, and the hooks are clamped in the corresponding card slots to clamp the upper box body and the lower box body together. The upward stop block is located on the bottom surface of the lower box body and An end close to the packaging box is provided with a main mandrel passage opening and an auxiliary mandrel passage opening.
The day and night curtain dual-track dual-control associated limiter according to claim 4, characterized in that: a main rotating sliding sleeve is provided at the crossing opening of the main mandrel, and the main mandrel moves from the non-circular shape of the main rotating sliding sleeve. The auxiliary mandrel passes through the non-circular through hole; the auxiliary mandrel passes through the opening and is provided with an auxiliary rotating sliding sleeve, and the auxiliary mandrel passes through the non-circular through hole of the auxiliary rotating sliding sleeve.
The day and night curtain dual-track dual-control associated limiter according to claim 5, characterized in that: guide positioning plates are provided at the bottoms of both sides of the upper box body and between the two hooks. Guide positioning grooves are provided on the tops of both sides of the lower box body and between the two clamping slots. The guide positioning plates are located in the guide positioning slots to align the hooks with the clamping slots.
The day and night curtain dual-track dual-control associated limiter according to claim 6, characterized in that: the bottom surface of the limit seat is provided with two plug-in blocks and jacks, and the jacks are located on the two plug-in connections. Between the blocks, two slots and plug-in posts are provided on the bottom surface of the lower box body. The two plug-in blocks are plugged into the slots and the plug-in posts are plugged into the jacks. Fix the limiter seat on the bottom surface of the limiter seat.
The day and night curtain dual-track dual-control associated limiter according to claim 1, characterized in that: the other end of the main screw is a D-shaped shaft, and a protrusion is provided on the D-shaped shaft and close to the external thread of the main screw. platform, the downward stop protrusion is provided on the side wall of the boss, one end of the main gear is provided with a fixed sleeve, the main gear and the fixed sleeve are integrally formed, and the through hole of the fixed sleeve is in line with the D-shaped shaft. Adaptable D-shaped hole, fixed sleeve inserted on the D-shaped shaft.
The day and night curtain dual-track dual-control associated limiter according to claim 8, characterized in that: the fixed sleeve is provided with a fixing hole, and a screw passes through the fixing hole and is threadedly connected to the D-shaped shaft to fix the main gear.
The day and night curtain dual-track dual-control associated limiter according to claim 4, characterized in that: a debugging observation window is provided on the surface of the upper box body.