A curtain positioning device and a shielding curtain for an in-swinging window

Abstract

This invention discloses a conveniently assembled curtain positioning device and a concealing curtain for inward-opening windows, relating to the field of curtain installation technology. The device includes a fixed base and an offset base. The fixed base is fixed to the window glass via a negative pressure adsorption mechanism or an adhesive layer. The offset base is detachably joined to the fixed base, connecting the fixed base and the curtain seat. The offset base is offset relative to the fixed base towards the window frame, positioning the curtain seat at a position that eliminates light gaps between the curtain edge and the window frame. By setting up the fixed base, offset base, and curtain seat, rapid assembly between the curtain and the window glass is achieved, and light gaps are eliminated. The device has a simple structure, is easy to assemble and disassemble, significantly reducing installation difficulty and time costs, and is suitable for user self-operation.

Description

Technical Field

[0001] This invention relates to the field of curtain installation technology, specifically to a curtain positioning device that is easy to assemble and a concealing curtain for inward-opening windows. Background Technology

[0002] Curtains, as a common home decoration and functional product, are widely used on windows of various buildings to achieve purposes such as blocking light, protecting privacy, and beautifying the environment. Common curtain installation methods include fixing them to the window frame or wall using curtain rods, curtain tracks, or directly using curtain holders (such as mounting brackets, hooks, etc.).

[0003] However, in actual use, users often face a problem: when the curtains are fully extended to cover the window glass, there are often gaps between the edge of the curtains and the window frame (including the top beam and side posts). These gaps allow light to pass through, seriously affecting the light-blocking effect of the curtains. This defect is particularly prominent in application scenarios with high requirements for light-blocking performance, such as bedrooms, home theaters, and laboratories.

[0004] The causes of these light-transmitting gaps are usually multifaceted. First, the window frame itself may have dimensional tolerances and unevenness due to processing or installation. Second, after being hung, the curtains, due to their own weight and the flexibility of the fabric, may not have edges that fit perfectly against the window frame. Furthermore, while some existing curtain positioning or tensioning devices attempt to solve this problem, their structures are often complex, the installation process cumbersome, and they frequently require alterations to the original window structure (such as drilling holes in the frame to install screws), making it inconvenient for users to quickly assemble, disassemble, and adjust them themselves.

[0005] For example, Chinese utility model patent CN219587491U discloses a suction cup pleated curtain, which includes a foldable curtain fabric with multiple folding units. The upper end of the curtain fabric is connected to an upper curtain rod, and the lower end is connected to a hollow lower curtain rod. A first suction cup is installed on the upper curtain rod, and a second suction cup is installed on the tensioning mechanism to magnetically attach the entire curtain to the upper and lower ends of the window glass. While this solution achieves drill-free installation of the curtain on the glass, it mainly relies on suction cups to fix the ends of the curtain rod, lacking the function of actively adjusting and positioning the relative position between the curtain edge and the window frame. This makes it difficult to effectively eliminate lateral or top light gaps caused by curtain size deviations or improper installation. Furthermore, the connection between the tensioning mechanism, curtain rod, and suction cups is relatively fixed, making it inconvenient for users to flexibly disassemble and fine-tune the position according to the actual window size or gap conditions.

[0006] Therefore, how to provide a curtain positioning device that is simple in structure, easy for users to assemble, and can effectively position the edge of the curtain to a position that can eliminate the light gap between the curtain and the window frame is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a curtain positioning device that is easy to assemble, and a blinding curtain for an inward-opening window that includes the positioning device, so as to solve the technical problems that light-transmitting gaps easily occur between the edge of the existing curtain and the window frame after installation, and that the existing positioning devices have complex structures and are not convenient for users to quickly assemble and adjust the positioning themselves.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A curtain positioning device that is easy to assemble, wherein each end of the curtain has at least one curtain base; comprising: Mounting bracket, suitable for being fixed to window glass; and An offset seat is used to connect the fixed seat and the curtain seat, and the offset seat is offset relative to the fixed seat in a direction closer to the window frame, so that the curtain seat is positioned at a position that can eliminate the light gap between the edge of the curtain and the window frame.

[0009] Furthermore, the offset seat is configured such that when it is positioned on the fixed seat in a first orientation, it is suitable for fixing the curtain positioning device to the left side of the window glass, and when it is positioned on the fixed seat in a second orientation, it is suitable for fixing the curtain positioning device to the right side of the window glass, wherein the first orientation and the second orientation are opposite to each other.

[0010] Furthermore, the biasing seat is detachably engaged with the fixed seat so that the orientation of the biasing seat can be switched between a first orientation and a second orientation.

[0011] Furthermore, the offset seat in the curtain positioning device fixed in the top left corner area of ​​the window glass is positioned on the fixed seat in a first orientation, and the offset seat in the curtain positioning device fixed in the top right corner area of ​​the window glass is positioned on the fixed seat in a second orientation.

[0012] Furthermore, the fixing base includes a base and a connecting arm, the connecting arm being integrally formed from the base toward the window frame, and the offset base and the connecting arm being detachably connected by a separable joint structure.

[0013] Furthermore, the connecting arm has a positioning post extending toward the side away from the window glass, and the offset seat is detachably engaged with the positioning post and can be limited to move along the positioning post; wherein, the positioning post is adapted to position the offset seat in the first orientation and the second orientation.

[0014] Furthermore, the biasing seat has a positioning sleeve that mates with the positioning post, and the biasing seat is configured to switch between a first orientation and a second orientation by rotating 90° around the axis of the positioning post.

[0015] Furthermore, an elastic element is connected between the offset seat and the positioning post. The elastic element applies force to the offset seat in a direction that causes the offset seat to press against the window frame, thereby reducing the light transmission gap between the edge of the curtain and the window frame.

[0016] Furthermore, the connecting arm is provided with a top positioning edge and a side positioning edge; wherein, the top positioning edge extends in the horizontal direction and serves as a positioning reference for ensuring that the curtain and the top beam of the window frame are parallel; wherein, the side positioning edge extends in the vertical direction and serves as a positioning reference for ensuring that the curtain and the side post of the window frame are parallel.

[0017] Furthermore, the offset seat includes a main body and a first connecting end and a second connecting end arranged at intervals in the width direction of the window glass. Both the first connecting end and the second connecting end can be connected to a curtain seat. Changing the direction of the offset seat can make one of the first connecting end and the second connecting end face outward.

[0018] Furthermore, the distance between the first connecting end and the main body is greater than the distance between the second connecting end and the main body. The curtain seat can be selectively connected to either the first connecting end or the second connecting end facing outwards to accommodate curtains of different widths.

[0019] The present invention also provides a blinding curtain for an inward-opening window, including curtain seats disposed at both ends of the curtain, the curtain seats being attached to the window glass by a curtain positioning device, the curtain positioning device being configured as the curtain positioning device described in any of the above claims.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects: This invention features independent fixed and offset seats, with the offset seats offset relative to the fixed seats towards the window frame. The offset seats are configured to detachably engage with the fixed seats in either a first or second opposing orientation. This allows users to easily remove the offset seats from the fixed seats, rotate them 90°, and re-engage them, making the same set of parts suitable for installation on either the left or right side of the window glass. Users can quickly switch between left and right installation directions without any additional tools or special accessories, reducing on-site assembly complexity and error rates, truly achieving the invention's goal of convenient assembly. Because the offset seats themselves have a fixed offset towards the window frame, when the curtain holder is connected to the offset seat, the edge of the curtain will be forced to be positioned closer to or even flush with the window frame, effectively eliminating light gaps caused by curtain size tolerances or improper centering during installation.

[0021] This invention further provides a first connecting end and a second connecting end spaced apart along the width of the window glass on the main body of the offset seat, with the distance between the first connecting end and the main body being greater than the distance between the second connecting end and the main body. This design allows the connecting end facing outwards to be either the far end or the near end when the offset seat is fixed to the fixed seat in a certain orientation. Users can flexibly choose the connection position of the curtain seat according to the actual width of the curtain to accommodate different sizes of curtain fabric. Simultaneously, the connecting arm of the fixed seat has a top positioning edge extending horizontally and a lateral positioning edge extending vertically. These positioning edges provide a clear parallel reference for the curtain during installation, ensuring that the curtain maintains a strict parallel relationship with the top beam and side posts of the window frame, avoiding problems such as large gaps on one side and deformation on the other side due to misaligned installation. In summary, this device, through the synergistic effect of the dual connecting end selection mechanism of the offset seat and the two-dimensional reference positioning mechanism of the fixed seat, solves the problem of the incompatibility of a single model of curtain positioning device with curtains of various widths, and eliminates additional gaps caused by unevenness of the window frame itself or deviations in installation techniques.

[0022] An elastic element is connected between the offset seat and the positioning post. This elastic element continuously applies a pressure to the offset seat towards the positioning post (i.e., near the window frame). Even if the offset seat undergoes slight displacement due to vibration, the weight of the curtain, or the aging of the adhesive strip during use, it can automatically press the offset seat against the window frame, thereby maintaining a seamless contact between the edge of the curtain and the frame for a long time, achieving a dynamic and adaptive long-lasting blackout effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of the curtain installed on the window in Example 1; Figure 2 This is a schematic diagram of the curtain positioning device in Example 1; Figure 3 This is an exploded view of the curtain positioning device in Example 1; Figure 4 This is a schematic diagram of the curtain positioning device installed on the window in Example 1; Figure 5 This is a schematic diagram of the connecting arm in Example 1; Figure 6 This is a cross-sectional view of the curtain positioning device in Example 1; Figure 7 This is a schematic diagram of the connection structure between the curtain seat and the offset seat in Example 2; Figure 8 This is a schematic diagram of the bias seat in Example 2; Figure 9 This is a schematic diagram of the structure after the offset seat is rotated in Example 2; Figure 10 This is a schematic diagram of the crossbar structure in Example 3.

[0025] Explanation of reference numerals in the attached figures: 100-Curtain positioning device; 1-Fixing seat; 11-Base; 12-Adjusting knob; 13-Connecting arm; 131-Top positioning edge; 132-Side positioning edge; 14-Positioning post; 141-Positioning hole; 2-Offset seat; 21-Positioning sleeve; 210-First positioning part; 211-Second positioning part; 22-Positioning protrusion; 23-First connecting end; 24-Second connecting end; 25-Positioning rod; 3-Elastic element; 4-Window frame; 41-Top beam; 42-Side post; 43-Window glass; 5-Curtain seat; 51-Positioning groove; 6-Horizontal rod; 7-Window sealing strip; 200-Curtain. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "first direction," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example 1: Please see Figures 1 to 6 This embodiment provides a curtain positioning device 100 that is easy to assemble. This device is particularly suitable for inward-opening window scenarios where high light-blocking performance is required, such as bedrooms, home theaters, offices, or laboratories that require light protection, and is used to install curtains 200 with curtain holders 5 at both ends, such as roller blinds, pleated blinds, Roman blinds, or honeycomb blinds.

[0031] like Figure 1 As shown, the curtain positioning device 100 is usually used in pairs in practical applications. It is fixed to the left corner area and the right corner area at the top of the window glass 43, respectively, to accurately position and fix the left and right ends of the curtain 200, so as to ensure that the curtain 200 can effectively block the window glass 43 after it is opened and eliminate the light gap between its edge and the window frame 4.

[0032] like Figures 2 to 3 As shown, the curtain positioning device 100 in this embodiment mainly includes a fixed base 1 and an offset base 2.

[0033] The fixing seat 1 is the reference component of the device, used to securely and detachably attach the entire positioning device 100 to the window glass 43. The offset seat 2 is a functional actuating component, which connects the fixing seat 1 and the curtain seat 5 respectively, and is offset relative to the fixing seat 1 towards the window frame 4. By introducing a fixed offset towards the window frame, the curtain seat 5 connected to the offset seat 2 and the edge of the curtain 200 it supports can be forcibly positioned closer to or even against the window frame 4, thereby effectively compensating for the gap defect between the curtain 200 and the window frame.

[0034] The mounting base 1 is preferably manufactured using an integrated injection molding process with engineering plastics (such as ABS (acrylonitrile-butadiene-styrene copolymer) or PC (polycarbonate) that have good structural strength and weather resistance, to ensure its overall rigidity, dimensional accuracy, and long-term stability. (See also...) Figures 3 to 5 The mounting base 1 includes a base 11 that is generally frustum-shaped or trapezoidal. The base 11 has a flat mounting surface facing the window glass 43. In order to achieve rapid installation without drilling or damage, and to facilitate repeated adjustments by the user, this embodiment integrates a negative pressure adsorption mechanism on the mounting surface.

[0035] Specifically, the negative pressure adsorption mechanism includes a flexible suction cup, a push rod, and an adjustment knob 12. The suction cup is made of oil-resistant and aging-resistant rubber or thermoplastic elastomer, and its edge fits against the periphery of the mounting surface. The push rod is fixedly connected to the central area of ​​the suction cup. A through threaded hole is opened at the center of the base 11, and the outer peripheral surface of the push rod has an external thread that precisely matches the threaded hole. The top end of the push rod protrudes from the side of the base 11 facing away from the mounting surface and is fixedly connected to the adjustment knob 12.

[0036] During the actual installation of the mounting bracket 1, the user first presses the suction cup onto the predetermined position on the window glass 43, expelling most of the air from the suction cup cavity to allow for initial adsorption. Then, the user rotates the adjustment knob 12 clockwise. Due to the threaded fit, the adjustment knob 12 drives the push rod to move axially towards the surface of the window glass 43 until the end of the push rod firmly abuts against the window glass 43. This action stretches the central area of ​​the suction cup outward, generating significant negative pressure within the suction cup cavity, greatly enhancing the adsorption force and ensuring that the mounting bracket 1 can withstand the entire weight of the curtain 200 without falling off. When disassembly or repositioning is required, the user simply rotates the adjustment knob 12 counterclockwise to release the push rod from the glass, eliminating the negative pressure within the suction cup cavity, allowing the mounting bracket 1 to be easily removed from the glass. By controlling the number of turns of the adjustment knob 12, the user can also steplessly adjust the adsorption force according to actual needs, achieving a perfect balance between installation convenience and reliability.

[0037] As a reliable alternative, a high-adhesion adhesive layer, such as acrylic foam tape, can also be applied to the mounting surface. This tape has excellent initial tack, holding power, and weather resistance, enabling it to firmly adhere the mounting bracket 1 to the clean surface of the window glass 43. This fixing method is simpler in structure, lower in cost, and suitable for installation scenarios where relocation is not required for extended periods.

[0038] Please see Figure 5 A connecting arm 13 is integrally formed on one side of the base 11 (i.e., the side facing the window frame 4). The connecting arm 13 is generally rectangular in shape and extends horizontally from the base 11 toward the window frame 4, thereby providing a connection base for the offset seat 2 outside the base 11. The end of the connecting arm 13 has a positioning post 14 extending toward the side away from the window glass 43 (i.e., upward), which is used to achieve a detachable connection with the offset seat 2.

[0039] To avoid obstructing the common window sealing strip 7 found on inward-opening windows and to ensure that the mounting bracket 1 can fit smoothly against the glass, from Figure 4 As can be clearly seen, when the mounting bracket 1 is correctly installed, a first gap space is naturally formed between the base 11 and the window frame 4 (side post 42). Simultaneously, a second gap space is formed between the lower part of the connecting arm 13 and the surface of the window glass 43, together constituting a clearance space. The window sealing strip 7 can be perfectly accommodated within this space without interfering with any part of the mounting bracket 1. This ensures that the device will not squeeze or damage the original sealing strip, thereby protecting the original airtightness and watertightness of the window.

[0040] like Figure 5 As shown, the top outer edge of the connecting arm 13 is provided with a top positioning edge 131, and its side outer edge is provided with a side positioning edge 132. The top positioning edge 131 is a straight edge extending in the horizontal direction, and the side positioning edge 132 is a straight edge extending in the vertical direction. These two positioning edges are perpendicular to each other. When installing the fixing base 1, the user can first press the side positioning edge 132 of the connecting arm 13 against the inner wall of the side column 42 of the window frame 4, while pressing the top positioning edge 131 against the lower edge of the top beam 41 of the window frame 4. While keeping these two positioning edges in close contact with the window frame, the suction cup or adhesive layer of the base 11 is then fixed to the glass. This process ensures that the fixing base 1 itself has an indisputably precise horizontal and vertical orientation relative to the window frame 4, laying a positioning reference for the subsequent parallel installation of the curtain 200.

[0041] Please see Figures 2 to 6As shown, the offset seat 2, as an independent component, is connected to the connecting arm 13 of the fixed seat 1 via a detachable engagement structure. In this embodiment, the detachable engagement structure is achieved by the cooperation of the positioning post 14 and the positioning sleeve 21 on the offset seat 2. Specifically, the positioning post 14 has a first positioning part 210 and a second positioning part 211. In this embodiment, as... Figure 3 As shown, the positioning post 14 is a regular cubic post. The first positioning part 210 and the second positioning part 211 are respectively arranged on the mutually perpendicular side walls of the positioning post 14, that is, the first positioning part 210 and the second positioning part 211 are the side surfaces of the positioning post 14 in the vertical direction. Correspondingly, the positioning sleeve 21 of the offset seat 2 has a positioning sleeve 21 that perfectly matches the shape of the positioning post 14. It can prevent the offset seat 2 from rotating unnecessarily relative to the positioning post 14, ensuring the stability of the offset direction; the user can change its relative angle with the positioning post 14 by rotating the offset seat 2, thereby achieving different orientation requirements.

[0042] In another preferred embodiment, the positioning post 14 is a cylinder, and the first positioning part 210 and the second positioning part 211 are upper protrusions provided on the outer peripheral wall of the positioning post 14.

[0043] To achieve a better automatic clamping effect, this embodiment also provides an elastic element 3 between the offset seat 2 and the positioning post 14. Specifically, a positioning hole 141 is provided axially at the center of the positioning post 14. Correspondingly, a positioning rod 25 is provided on the offset seat 2, which can be inserted into the positioning hole 141. A helical compression spring is sleeved on the positioning rod 25, one end of which abuts against the end face of the positioning post 14, and the other end is limited by a screw or snap ring fixed to the end of the positioning rod 25. Under the natural elastic force of the spring, the offset seat 2 is always subjected to a thrust toward the positioning post 14 (i.e., toward the window frame 4).

[0044] Once the entire device is installed, the elastic element 3 continuously presses the offset seat 2 (and consequently the edge of the curtain 200 via the curtain seat 5) tightly against the window frame 4 to reduce the light gap between the window frame 4 and the curtain edge. Even if there are minor unevennesses on the surface of the window frame 4, or if the window vibrates slightly due to wind pressure or opening and closing during use, the elastic element 3 can automatically compensate for these displacements, ensuring that the curtain edge always remains in close contact with the window frame, thereby dynamically eliminating any intermittent light gaps. When the user needs to disassemble or adjust the orientation of the offset seat 2, simply overcome the spring force and pull the offset seat 2 outward to disengage its positioning sleeve 21 from the fixing seat 1; the operation is very convenient.

[0045] In this embodiment, the offset seat 2 and the curtain seat 5 are integrally formed. To achieve versatility for installation on both the left and right sides, the offset seat 2 is configured to be positioned on the fixed seat 1 in either a first orientation or a second orientation, with these two orientations being opposite to each other. Figure 4 As shown, when the bias seat 2 is Figure 4 When the offset seat 2 is inserted into the fixing seat 1 in the first orientation, it is suitable for fixing the curtain seat 5 on the left side of the window glass 43. At this time, the offset seat 2 is positioned on the positioning post 14 in the first orientation. The offset seat 2 can switch between the first orientation and the second orientation by rotating 90° around the axis of the positioning post 14. When the user pulls out the offset seat 2, rotates it 90° and reinserts it, it becomes suitable for fixing the curtain seat 5 on the right side of the window glass 43. This allows the same set of parts to perfectly fit the left and right sides of the window, greatly simplifying production management and user installation. There is no need to distinguish between "left-side dedicated" and "right-side dedicated" models, truly realizing the original intention of convenient assembly.

[0046] The following describes the assembly process in detail, taking the installation of curtains on the left side of an inward-opening window as an example: Based on the installation location being the left side of the window, the user will place the offset mount 2... Figure 4 The first orientation shown is fitted onto the positioning post 14 of the fixed base 1. The first orientation is... Figure 4 The orientation of the offset seat 2 on the left side of the middle is mounted on the fixed seat 1, and the second orientation is... Figure 4 The biasing seat 2 on the right side is mounted on the fixed seat 1. During operation, the user overcomes the resistance of the elastic element 3, aligns the positioning sleeve 21 of the biasing seat 2 with the positioning post 14 and pushes it until the positioning sleeve 21 and the positioning post 14 are fully engaged, and the elastic element 3 is compressed and stores potential energy.

[0047] The user places the pre-assembled offset bracket 2 and the mounting bracket 1 against the upper left corner of the window glass 43. First, the top positioning edge 131 of the connecting arm 13 abuts against the lower edge of the top beam 41, while the side positioning edge 132 abuts against the inner wall of the side column 42. Then, the user presses the suction cup of the base 11 onto the glass to expel air. Finally, the user tightens the adjusting knob 12 clockwise, generating a strong negative pressure by stretching the suction cup through the top rod, thus securing the mounting bracket 1 firmly.

[0048] Secure the curtain base 5 to the left end of the curtain 200, completing the left-side installation. Repeat the above steps to install the curtain positioning device 100 on the right side in a symmetrical manner (inserting the offset base 2 after rotating it 90°). At this point, the curtain 200 is installed. Due to the fixed offset of the offset base 2 and the continuous thrust provided by the elastic element 3, the left, right, and top edges of the curtain 200 will maintain seamless and tight contact with the side posts 42 and top beam 41 of the window frame 4, achieving an ideal "complete blackout" effect.

[0049] Example 2: Please see Figures 7 to 9 This embodiment, based on embodiment 1, further optimizes the connection method between the offset seat 2 and the curtain seat 5, as well as the structure of the offset seat 2 itself, to provide stronger versatility and adaptability. The main difference from embodiment 1 is that the offset seat 2 and the curtain seat 5 in this embodiment adopt a detachable joint structure, and the offset seat 2 provides multiple connection ends with different offset distances for users to choose from.

[0050] The main body of the offset seat 2 is roughly a rectangular block structure, such as... Figure 8 and Figure 9 As shown, a first connecting end 23 and a second connecting end 24 are arranged at intervals in the horizontal direction. Both the first connecting end 23 and the second connecting end 24 are interfaces that protrude outward from the main body and are used to connect with the curtain seat 5. The horizontal distance between the first connecting end 23 and the main body is significantly greater than the horizontal distance between the second connecting end 24 and the main body. In other words, the offset seat 2 of this embodiment provides two different fixed offsets for different installation requirements.

[0051] To enable a detachable connection with the independent curtain base 5, rectangular or dovetail-shaped slots matching the shape of the insertion end of the curtain base 5 are provided inside the first connecting end 23 and the second connecting end 24. To ensure a reliable connection and prevent the curtain 200 from accidentally falling off during normal use or under slight pulling, a spring-loaded snap-locking structure is also provided between them. Specifically, as shown... Figure 7 As shown, the offset seat 2 is formed with a pair of positioning protrusions 22, while the corresponding position of the insertion end of the curtain seat 5 is provided with a pair of positioning grooves 51 that match its shape. When the user fully pushes the insertion end of the curtain seat 5 into the slot of the first connecting end 23 or the second connecting end 24, the insertion end of the curtain seat 5 will first be compressed and deformed, and then elastically reset after being inserted into place, locking into the positioning protrusions 22 and making a crisp "click" sound. This sound provides a clear sense of being in place and achieves self-locking, indicating to the user that the connection is complete. When disassembly is required, the user only needs to apply an outward pulling force greater than the retaining force of the elastic buckle to separate them. The entire disassembly and assembly process does not require any tools and is extremely simple.

[0052] If the curtain itself is of standard width, and the distance between its edge and the window frame is small when unfolded, the user can choose to insert the curtain base 5 into the second connecting end 24 with a smaller offset distance, and align this connecting end towards the window frame 4. In this case, the device generates a small offset, which is just enough to eliminate lateral gaps. Conversely, if the curtain itself is made too wide, or the user wants the curtain edge to press more tightly against the window frame, making its edge farther from the frame, the user can choose to insert the curtain base 5 into the first connecting end 23 with a larger offset distance, and align this connecting end outwards (i.e., towards the window frame). In this case, the device generates a large offset, which can "push" the curtain edge towards the window frame more significantly. The user simply needs to pull the offset base 2 from the fixing base 1, choose either the first connecting end 23 or the second connecting end 24 facing the window frame as needed, and then reinsert the fixing base 1, freely choosing between the two offset distances. This achieves good adaptability to curtain width tolerances, achieving optimal light-blocking effect without the need for custom-made curtains.

[0053] Example 3: Please see Figure 10 This embodiment provides another implementation of the curtain positioning device, which is particularly suitable for installing large or heavy curtains. The main difference from Embodiments 1 and 2 is that this embodiment also includes a crossbar 6.

[0054] The crossbar 6 is a slender, rectangular rod-shaped component, the length of which is approximately the same as the unfolded width of the curtain 200. The crossbar 6 can be made of lightweight, high-strength aluminum alloy or carbon fiber material to reduce the overall weight while ensuring support strength.

[0055] The horizontal bar 6 is configured to be fixedly connected to the offset seats 2 of the left and right curtain positioning devices 100. Specifically, this can be achieved by means of one-piece molding, screw fastening, or clamp connection. After the horizontal bar 6 is installed, it will span the entire left and right ends of the window, providing a continuous, flat, and rigid support base for the curtain 200.

[0056] For very wide windows, two separate offset seats 2 may not be enough to ensure that the left and right ends of the curtain can be completely covered. The introduction of the crossbar 6 can better eliminate the gap between the curtain and the window frame.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A curtain positioning device for easy assembly, wherein each end of the curtain has at least one curtain base; characterized in that, have: Mounting bracket, suitable for being fixed to window glass; and An offset seat, which is detachably attached to a fixed seat and serves to connect the fixed seat and the curtain seat, is offset relative to the fixed seat in a direction closer to the window frame, such that the curtain seat is positioned to eliminate light gaps between the curtain edge and the window frame.

2. The curtain positioning device according to claim 1, characterized in that, When the offset seat is configured to be positioned on the fixed seat in a first orientation, it is suitable for fixing the curtain positioning device to the left side of the window glass, and when it is positioned on the fixed seat in a second orientation, it is suitable for fixing the curtain positioning device to the right side of the window glass.

3. The curtain positioning device according to claim 2, characterized in that, The biasing seat is detachably attached to the fixed seat via a plug-in engagement structure, allowing the biasing seat to switch between a first orientation and a second orientation.

4. The curtain positioning device according to claim 2 or 3, characterized in that, The offset seat in the curtain positioning device fixed in the top left corner area of ​​the window glass is positioned on the fixed seat in a first orientation, and the offset seat in the curtain positioning device fixed in the top right corner area of ​​the window glass is positioned on the fixed seat in a second orientation.

5. The curtain positioning device according to claim 2 or 3, characterized in that, The fixing base includes a base and a connecting arm. The connecting arm extends integrally from the base toward the window frame. The offset base and the connecting arm are connected by a separable joint structure to achieve a detachable connection.

6. The curtain positioning device according to claim 5, characterized in that, The connecting arm has a positioning post extending toward the side away from the window glass, and the offset seat is detachably engaged with the positioning post and can be limited to move along the positioning post; wherein, the positioning post is adapted to position the offset seat in the first orientation and the second orientation.

7. The curtain positioning device according to claim 6, characterized in that, The biasing seat has a positioning sleeve that mates with the positioning post, and the biasing seat is configured to switch between a first orientation and a second orientation by rotating 90° around the axis of the positioning post.

8. The curtain positioning device according to claim 6, characterized in that, An elastic element is connected between the offset seat and the positioning post. The elastic element applies force to the offset seat in a direction that causes the offset seat to press against the window frame, thereby reducing the light-transmitting gap between the edge of the curtain and the window frame.

9. The curtain positioning device according to claim 5, characterized in that, The connecting arm has a top positioning edge and a side positioning edge; wherein, the top positioning edge extends in the horizontal direction and serves as a positioning reference for ensuring that the curtain is parallel to the top beam of the window frame; wherein, the side positioning edge extends in the vertical direction and serves as a positioning reference for ensuring that the curtain is parallel to the side posts of the window frame.

10. The curtain positioning device according to claim 1, characterized in that, The offset seat includes a main body and a first connecting end and a second connecting end arranged at intervals in the width direction of the window glass. Both the first connecting end and the second connecting end can be connected to a curtain seat. Changing the direction of the offset seat can make one of the first connecting end and the second connecting end face outward.

11. The curtain positioning device according to claim 10, characterized in that, The distance between the first connecting end and the main body is greater than the distance between the second connecting end and the main body. The curtain seat can be selectively connected to the first connecting end or the second connecting end facing outward to accommodate curtains of different widths.

12. A blackout curtain for an inward-opening window, comprising curtain bases disposed at both ends of the curtain, characterized in that, The curtain seat is attached to the window glass via a curtain positioning device, which is configured as the curtain positioning device according to any one of claims 1-11.

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