Curtain slat lifting device for cordless curtains

Abstract

The utility model discloses a curtain piece lifting device of window curtain without pull rope, it contains a window curtain body, two operating plates and an operating rod, the window curtain body is a window curtain without pull rope, has an upper rail, a middle rail, a lower rail, and a curtain piece connected between the middle rail and the lower rail, the middle rail and the lower rail are equipped with an operating plate, to push and pull control the middle rail and the lower rail lifting action, the operating rod is connected and drives the operating plate to descend displacement, the brake hole design of the operating plate is used, so that the operating rod can be stretched with an angle to the handle portion, further in two point fixed mode the brake head is connected the operating plate, ensure that the middle rail and the lower rail can be in horizontal form and pull down displacement, improve the smoothness and stability of the curtain piece unfolding, folding, prevent the rope body from being cut and help to prolong the service life.

Description

Technical Field

[0001] This utility model relates to a curtain structure, specifically to a curtain slat lifting device for a cordless curtain. Background Technology

[0002] Currently, most cordless curtains require the user to hold the bottom rail and push or pull it upwards or downwards to open or close the curtain. However, if the curtain is installed high up, the user's height can limit the smooth extension of the bottom rail, making it difficult to extend smoothly. This necessitates the use of a control rod to assist in pushing and pulling the bottom rail. Currently, cordless curtains commonly on the market utilize a control rod for opening and closing. Please refer to... Figure 12 , 13 As shown, it includes a cordless curtain 40, which has an upper rail 41, a middle rail 42, a lower rail 43, and a curtain slat 44 connected between the middle rail 42 and the lower rail 43. The middle rail 42 and the lower rail 43 are each provided with an operating plate 45. The operating plate 45 is provided with a through hole 451 for an operating rod 46 to push and pull the middle rail 42 or the lower rail 43 to raise and lower, thereby achieving the purpose of opening and closing the curtain slat 44.

[0003] The aforementioned operating lever 46 has a hook 461 at its top. When the middle rail 42 or the lower rail 43 is to be pulled down, the hook 461 can engage with the through hole 451 of the operating plate 45, and then force is applied to pull the middle rail 42 or the lower rail 43 down. However, since the operating plate 45 extends horizontally outward from the middle rail 42 and the lower rail 43, and the through hole 451 is close to the outer edge of the operating plate 45, when the operating lever 46 engages with the through hole 451 of the operating plate 45 with the hook 461 and applies force to pull down, the hook 461... 1. The control plate 45 is connected by only one point, and the perforation 451 is closer to the outer edge of the control plate 45. This causes the control plate 45 to sink and tilt downwards when subjected to force, which in turn causes one side of the middle rail 42 or the lower rail 43 to tilt downwards. This causes the rope holes 421 and 431 of the middle rail 42 or the lower rail 43 to rub against the rope 47 due to the tilt. This not only seriously affects the lifting stability and smoothness of the middle rail 42 or the lower rail 43, but also makes it more likely to break due to constant friction with the rope 47, thereby reducing market competitiveness. There is a clear need for improvement.

[0004] In view of this, based on the author's many years of experience in manufacturing, developing and designing related products, and after detailed design and careful evaluation for the above objectives, the author has finally come up with this utility model that is indeed practical. Utility Model Content

[0005] The technical problem this utility model aims to solve is to address the aforementioned deficiencies in the existing technology by providing a curtain slat lifting device for cordless curtains. This device includes a curtain body, which is a cordless curtain, and has an upper rail, a middle rail that is vertically displaced below the upper rail, a lower rail that is vertically displaced below the middle rail, and a curtain slat connected between the middle rail and the lower rail. Each of the middle rail and the lower rail is provided with an operating plate for pushing and pulling to control the vertical movement of the middle rail and the lower rail. The operating plate is characterized by a horizontally extending handle, which penetrates the upper and lower surfaces and has a braking hole. The braking hole is gourd-shaped and has a large diameter portion for... The device includes a small-diameter section, a large-diameter section facing the outer edge of the handle, a small-diameter section adjacent to the middle rail and the lower rail, and an operating lever. One end of the operating lever has a brake head, and a locking portion extends above the brake head. A necking section is provided between the locking portion and the brake head below the locking portion. The outer diameter of the locking portion is smaller than the large-diameter section but larger than the small-diameter section. The necking section can be displaced and extended into the small-diameter section. Furthermore, the locking portion abuts against the upper part of the small-diameter section to form a positioning, allowing the operating lever to tilt and position the locking portion towards the small-diameter section, and allowing the operating lever to extend outward rather than perpendicular to the handle, thereby ensuring that the middle rail and the lower rail descend in a horizontal manner.

[0006] Preferably, the outer edge of the handle of the control plate is thickened to have a resting part, the inner edge of the handle extends outward to form an arc-shaped end, and the inner wall of the small diameter part of the brake hole further forms an arc-shaped wall surface at the arc-shaped end.

[0007] Preferably, the brake head has a sleeve portion for fitting onto one end of the operating lever, and a rivet is further radially inserted through the outer diameter of the sleeve portion to connect and fix it to the operating lever.

[0008] Preferably, the outer diameter of the brake head is larger than the engaging portion, and the upper edge of the brake head gradually tapers to form an inwardly tapered arc surface that connects to the necked section. The outer diameter of the inwardly tapered arc surface is larger than the large diameter of the brake hole, thereby restricting the brake head to the lower surface of the handle portion.

[0009] Preferably, an extension arm is provided on one side of the brake head, and a hook is provided at the bottom of the distal end of the extension arm.

[0010] Compared to the advantages of prior art: When the operating lever drives the operating plate to descend, the brake hole of the operating plate and the brake head of the operating lever are designed to work together, allowing the operating lever to tilt and stretch outward at an angle rather than perpendicular to the handle. Furthermore, the brake head is connected to the operating plate at two points, making the structural connection more stable and less prone to tilting or swaying. This ensures that the middle and lower rails can be pulled down horizontally, improving the smoothness and stability of the curtain's opening and closing, while also preventing the rope from being cut, thus contributing to an extended service life. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present invention.

[0012] Figure 2 This is an exploded view of the operating lever of this utility model.

[0013] Figure 3 This is a partially enlarged schematic diagram of the operation panel of this utility model.

[0014] Figure 4 This is a schematic diagram of the operating lever of this utility model mounted on the operating panel.

[0015] Figure 5 This is a top view of the operating lever of this utility model mounted on the operating panel.

[0016] Figure 6 This is a schematic diagram of the operating lever of this utility model being tilted and stretched outwards.

[0017] Figure 7 This is a schematic diagram showing how the operating lever of this utility model is pulled down to activate the lower rail.

[0018] Figure 8 This is a schematic diagram showing how the operating lever of this utility model is pulled down to activate the middle rail.

[0019] Figure 9 This is a schematic diagram of the operation lever of this utility model being pushed up to activate the lower rail.

[0020] Figure 10 This is a perspective view of another embodiment of the operating lever of this utility model.

[0021] Figure 11 This is a schematic diagram of the upward pushing action of another embodiment of the operating lever of this utility model.

[0022] Figure 12 This is a schematic diagram of an existing curtain and its control rod.

[0023] Figure 13 This is a schematic diagram of an existing curtain track tilting when pulled down by the control rod.

[0024] Symbol explanation:

[0025] [This utility model]

[0026] 10: Curtain Body

[0027] 11: Upper rail

[0028] 12: Middle Track

[0029] 13: Lower rail

[0030] 14: Curtain slats

[0031] 15: Rope body

[0032] 20: Control Panel

[0033] 21: Handle

[0034] 211: Reliance Department

[0035] 212: Curved end

[0036] 22: Brake hole

[0037] 221: Large diameter part

[0038] 222: Small diameter section

[0039] 223: Circular arc wall surface

[0040] 30: Control lever

[0041] 31: Brake head

[0042] 311: Sleeve section

[0043] 312: Rivet

[0044] 313: Inward-curving surface

[0045] 32: Card-connecting section

[0046] 33: Cervical constriction

[0047] 34: Extending arm

[0048] 341: Hook

[0049] [Primary Technology]

[0050] 40: Curtains without drawstring

[0051] 41: Upper rail

[0052] 42: Middle Track

[0053] 421: Rope Hole

[0054] 43: Lower rail

[0055] 431: Rope Hole

[0056] 44: Curtain slats

[0057] 45: Control Panel

[0058] 451: Perforation

[0059] 46: Control lever

[0060] 461: Hook

[0061] 47: Rope body Detailed Implementation

[0062] To further understand and recognize the purpose, features, and effects of this utility model, the following is a detailed description in conjunction with the accompanying drawings:

[0063] First, please let Figure 1 , 2 As shown in Figure 3, a curtain slat lifting device for a cordless curtain includes a curtain body 10, two control plates 20, and an operating rod 30. The curtain body 10 is a cordless curtain with an upper rail 11, a middle rail 12 that is lifted and displaced below the upper rail 11, a lower rail 13 that is lifted and displaced below the middle rail 12, and a curtain slat 14 connecting the middle rail 12 and the lower rail 13. Each of the middle rail 12 and the lower rail 13 is provided with an control plate 20 for pushing and pulling to control the lifting and lowering of the middle rail 12 and the lower rail 13. Each control plate 20 extends horizontally with a handle 21, and the handle 21 has a brake extending through the upper and lower surfaces. The brake hole 22 is gourd-shaped and has a large diameter portion 221 and a small diameter portion 222. The large diameter portion 221 faces the outer edge of the handle portion 21, and the small diameter portion 222 is adjacent to the middle rail 12 and the lower rail 13. One end of the operating lever 30 is provided with a brake head 31. A spherical engaging portion 32 extends above the brake head 31. A necked section 33 is provided between the engaging portion 32 and the brake head 31. The outer diameter of the engaging portion 32 is smaller than the large diameter portion 221 and larger than the small diameter portion 222. The necked section 33 can be displaced and extended into the small diameter section 222. The engaging portion 32 is further positioned by abutting against the top of the small diameter portion 222.

[0064] Further explanation of its structural embodiments will be provided by [the relevant authority / organization]. Figure 2 , 3 As shown, the outer edge of the handle 21 of the operating plate 20 is thickened to have a backing portion 211, and the inner edge of the handle 21 extends outward to form an arc end 212. The inner wall of the small diameter portion 222 of the brake hole 22 extends further to the arc end 212 to form an arc wall surface 223. The brake head 31 has a sleeve portion 311 for fitting onto one end of the operating lever 30. A rivet 312 is radially inserted through the outer diameter of the sleeve portion 311 to connect and fix it to the operating lever 30. The outer diameter of the brake head 31 is larger than the engaging portion 32, and the upper edge of the brake head 31 gradually narrows to form an inwardly narrowed arc surface 313 and connects to the necked section 33. The outer diameter of the inwardly narrowed arc surface 313 is larger than the diameter of the large diameter portion 221 of the brake hole 22, thereby restricting the brake head 31 to the lower surface of the handle 21.

[0065] For further information on the use of its structural embodiments, please refer to [the relevant documentation / instructions]. Figure 4 , 5As shown in Figures 6 and 7, this embodiment is a cordless curtain with a middle rail 12 and a lower rail 13 that can be opened upwards and downwards. However, it is not limited to this and can also be a one-way cordless curtain with only an upper rail 11 and a lower rail 13. The following is an instruction on the use of the cordless curtain with upward and downward opening: First, when the curtain body 10 wants to control the lower rail 13 to move downwards to form the curtain slats 14 in the open light-blocking mode, the operating rod 30 is connected to the operating plate 20 of the lower rail 13. The brake head 31 moves the engaging part 32 from bottom to top through the large diameter part 221 of the brake hole 22. Then, the operating rod 30 is tilted and stretched outwards at an angle A instead of perpendicular to the handle 21. The necking section 33 is used to move the engaging part 32 towards the small diameter part 222 and push the engaging part 32 against the brake hole 222. Positioning is achieved by the arcuate wall 223 of the small diameter portion 222. At this time, the engaging portion 32 abuts against the inner side of the handle portion 21, which is close to the lower rail 13. Meanwhile, the brake head 31 abuts against the abutting portion 211 of the outer edge of the handle portion 21. This allows the inner and outer edges of the handle portion 21 to be balanced by the equal force applied by the engaging portion 32 and the brake head 31. The point of downward force application (engaging portion 32) is brought closer to the lower rail 13. Based on this, the operating lever 30 is pulled down and the lower rail 13 is moved downward to unfold the curtain slat 14, forming the light-blocking form of the lower half of the curtain body 10. This ensures that the lower rail 13 moves downward in a horizontal manner, which not only prevents the lower rail 13 from skewing and rubbing against the rope 15 of the curtain body 10, but also improves the stability of the downward movement of the lower rail 13.

[0066] Furthermore, if you wish to control the lowering of the central rail 12 to create a light-transmitting pattern where the upper half of the curtain slat 14 is closed, please then... Figure 8 As shown, the operating lever 30 is connected to the operating plate 20 of the middle rail 12. Similarly, the operating lever 30 is tilted outward and stretched at an angle A instead of being perpendicular to the handle 21, so that the inner end and outer edge of the handle 21 are simultaneously locked at two points by the locking part 32 and the brake head 31 to form a balance. Based on this, when the operating lever 30 is pulled down and the middle rail 12 is moved downward to close the curtain slat 14, forming the light-transmitting shape of the upper half of the curtain body 10, it can be ensured that the lower rail 13 descends in a horizontal shape. This not only avoids the lower rail 13 from skewing and rubbing against the rope 15 of the curtain body 10, but also improves the stability of the descent of the lower rail 13.

[0067] Furthermore, if you wish to move the middle rail 12 or the lower rail 13 upwards via the operating lever 30, then... Figure 9 As shown, since the outer diameter of the brake head 31 is larger than the large diameter 221 of the brake hole 22, forming a push-back state, and the curtain body 10 is equipped with a pre-set elastic retraction device (not shown in the figure), pushing the operating rod 30 upwards will activate the elastic retraction device to wind up the rope 15, further pushing the middle rail 12 upwards to unfold the upper half of the curtain slat 14, or pushing the lower rail 13 upwards to retract the lower half of the curtain slat 14.

[0068] Another embodiment of the operating lever 30, please refer to Figure 10 , 11 As shown, an extension arm 34 is provided on one side of the brake head 31. A hook 341 protrudes downward from the bottom of the distal end of the extension arm 34. Accordingly, when the middle rail 12 or the lower rail 13 is pushed upward by the operating rod 30, the brake head 31 will abut against the brake hole 22, and the extension wall 34 will also abut against the bottom of the operating plate 20 to form a two-point abutment state, so that the middle rail 12 or the lower rail 13 can remain horizontal and achieve a smooth upward movement effect. In addition, when the operating rod 30 is not in use, it can be hooked from top to bottom onto the brake hole 22 by the hook 341, and the operating rod 30 can be suspended on the operating plate 20 for easy storage and use of the operating rod 30.

[0069] Through the structure of the above specific embodiment, the following benefits can be obtained: When the operating lever 30 drives the operating plate 20 to descend, the brake hole 22 of the operating plate 20 and the brake head 31 of the operating lever 30 are designed to cooperate, so that the operating lever 30 can be tilted outward and stretched at an angle A instead of being perpendicular to the handle 21. Furthermore, the brake head 31 is connected to the operating plate 20 by a two-point fixing method, making the structural connection more stable and less prone to tilting or shaking. This ensures that the middle rail 12 and the lower rail 13 can be pulled down in a horizontal shape, improving the smoothness and stability of the curtain slats 14 opening and closing, while preventing the rope 15 from being cut, thus helping to extend its service life.

[0070] The above description is only a preferred embodiment of this utility model and should not be construed as limiting the scope of this utility model; that is, all equivalent changes and modifications made in accordance with the scope of the patent application of this utility model should still fall within the scope of this utility model patent.

Claims

1. A curtain slat lifting device for a cordless curtain, comprising a curtain body, the curtain body being a cordless curtain, having an upper rail, a middle rail that is vertically displaced below the upper rail, a lower rail that is vertically displaced below the middle rail, and a curtain slat connected between the middle rail and the lower rail, wherein each of the middle rail and the lower rail is provided with an operating panel for pushing and pulling to control the vertical movement of the middle rail and the lower rail, characterized in that: The operating panel extends horizontally with a handle. The handle has a brake hole extending through its upper and lower surfaces. The brake hole is gourd-shaped with a large diameter and a small diameter. The large diameter faces the outer edge of the handle, while the small diameter is adjacent to the middle rail and the lower rail, as well as an operating lever. One end of the operating lever has a brake head. Above the brake head, a locking part extends. Below the locking part and between the locking part and the brake head, there is a necking section. The outer diameter of the locking part is smaller than the large diameter but larger than the small diameter. The necking section can be displaced and extended into the small diameter section. The locking part abuts against the top of the small diameter to form a positioning, allowing the operating lever to tilt and position itself towards the small diameter. This allows the operating lever to extend outward rather than perpendicular to the handle, thereby ensuring that the middle rail and the lower rail descend in a horizontal manner.

2. The curtain slat lifting device for a cordless curtain as described in claim 1, characterized in that, The outer edge of the handle of the control panel is thickened to have a resting part, and the inner edge of the handle extends outward to form an arc-shaped end. The inner wall of the small diameter part of the brake hole further forms an arc-shaped wall surface at the arc-shaped end.

3. The curtain slat lifting device for a cordless curtain as described in claim 1, characterized in that, The brake head has a sleeve portion for fitting onto one end of the operating lever, and a rivet is radially inserted through the outer diameter of the sleeve portion to connect and fix it to the operating lever.

4. The curtain slat lifting device for a cordless curtain as described in claim 1, characterized in that, The outer diameter of the brake head is larger than the engaging portion, and the upper edge of the brake head gradually tapers to form an inwardly tapered arc surface that connects to the necked section. The outer diameter of the inwardly tapered arc surface is larger than the large diameter of the brake hole, thereby restricting the brake head to the lower surface of the handle.

5. The curtain slat lifting device for a cordless curtain as described in claim 1, characterized in that, The brake head has an extension arm on one side, and a hook protrudes downward from the bottom of the far end of the extension arm.

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