Winding belt connecting device for blind window and blind window

Abstract

The invention discloses a winding tape connecting device for a shutter and the shutter, and relates to the field of shutters. The winding belt connecting device for the shutter comprises a first fastener connected with a winding belt, a second fastener in contact with the first fastener, a third fastener connected with the second fastener and a rod piece arranged on the shutter and connected with the third fastener. One end of the winding tape penetrates through the second fastener and is wound in the first fastener, and the first fastener abuts against one side of the second fastener, so that one end of the winding tape is fixed in the second fastener; the third fastener is connected with the rod piece in a sliding mode, and the third fastener can be connected with the second fastener so that the second fastener can be fixed to the rod piece. The blind window comprises the winding belt connecting device for the blind window. By the adoption of the device, the winding tape can be conveniently installed and connected, stable connection is guaranteed, and disassembly and maintenance are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of blinds, and particularly to a tape connection device for blinds and a blind. Background Art

[0002] As an important device for building sunshade and indoor light regulation, the core functions of blinds rely on the stability and operational convenience of the drawstring system. Traditional blinds achieve lifting and angle adjustment through the mechanical linkage of drawstrings with the blades and the upper and lower beams. However, existing drawstrings generally adopt a design of thin ropes with a circular cross-section (such as nylon ropes, polyester fiber ropes, etc.). The cross-sectional shape thereof causes easy rotation when stressed, affecting the stability of force transmission; at the same time, the contact area is small and the load-bearing capacity is limited. Based on this, some enterprises change the thin ropes with a circular cross-section to tape with a long and flat cross-section to pull the blinds up and down. However, some enterprises still adopt the fixing method of thin ropes with a circular cross-section to fix the tape, that is, one end of the tape is directly tied to the lower rod or the upper rod as the fixation of the end of the tape. However, since the tape is long and flat, it is not easy to directly wind and tie. This fixing method and fixing structure require a long operation time, and the tying depends on the friction force and the strength of the knot. It is easy to loosen after long-term use, and disassembly requires destroying the original structure. Therefore, it is not conducive to installation and disassembly, and the stability is also poor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tape connection device for blinds, which can facilitate the installation and connection of the tape, ensure firm connection, and facilitate disassembly and maintenance.

[0004] To solve the above technical problem, the present invention provides a tape connection device for blinds, which is used for hanging or fixing the tape of the blinds, and includes a first fastener connected to the tape, a second fastener in contact with the first fastener, a third fastener connected to the second fastener, and a rod provided on the blind and connected to the third fastener.

[0005] One end of the tape passes through the second fastener and is wound around the first fastener, and the first fastener abuts against one side of the second fastener to fix one end of the tape in the second fastener.

[0006] The third fastener is slidably connected to the rod, and the third fastener can be connected to the second fastener to fix the second fastener on the rod.

[0007] As an improvement of the above solution, the second fastener includes a tape-passing hole which longitudinally penetrates the main body of the second fastener, and one end of the tape can pass through the tape-passing hole and be connected to the first fastener.

[0008] The length of the cross-section of the tape-passing hole is greater than the width of the tape.

[0009] As an improvement to the above solution, the first fastener includes a limiting arm that extends from both sides, the horizontal length of the limiting arm is greater than the cross-sectional length of the belt-passing hole, and the limiting arm can abut against the side of the belt-passing hole.

[0010] As an improvement to the above solution, the third fastener includes a folding arm, the folding arm includes a sliding strip, the sliding strip protrudes outward from both sides of the third fastener, a sliding groove is provided on the surface of the rod member, the sliding groove is recessed inward, and the sliding strip can be inserted into the sliding groove and slide within the sliding groove.

[0011] As an improvement to the above solution, a fixing hole is provided in the rod member, the second fastener includes an insertion portion and an outer blocking portion, the insertion portion can be inserted into the fixing hole, and the outer blocking portion can block the fixing hole; after the insertion portion is inserted into the fixing hole, the third fastener can slide to the position of the second fastener and be connected to the second fastener.

[0012] As an improvement to the above solution, a limiting groove is provided between the end of the insertion portion and the end of the outer blocking portion, a limiting plate is provided on the third fastener, the limiting plate is provided between the two folding arms, and after the third fastener slides to the position of the second fastener, the limiting plate can be inserted into the limiting groove, and at this time the folding arms surround both sides of the second fastener.

[0013] As an improvement to the above solution, the folding arm further includes a folding plate, the folding plate is provided on the inner side of the folding arm and extends towards the inner side of the third fastener, and after the third fastener slides to the position of the second fastener, the inner side of the folding plate can abut against the side wall of the insertion portion or be located at the side of the insertion portion.

[0014] As an improvement to the above solution, a buckle is provided on the inner side of the folding plate, the buckle protrudes from the inner side of the folding plate towards the inner side of the third fastener, the outer surface of the buckle is arc-shaped, a card slot is provided on the side of the insertion portion, the card slot is recessed on the surface of the insertion portion, and the inner surface of the card slot is arc-shaped. After the third fastener slides to the position of the second fastener, the buckle can be inserted into the card slot.

[0015] As an improvement to the above solution, the folding arm further includes a connecting plate, the connecting plate is connected between the sliding strip and the folding plate, and the longitudinal sections of the folding plate, the connecting plate and the sliding strip form a "Z" shape. A convex platform is provided in the middle of the rod member, the convex platform protrudes from the surface of the sliding groove, the fixing hole is provided on the convex platform, and the connecting plates on both sides of the limiting plate can surround both sides of the convex platform.

[0016] As an improvement to the above solution, the third fastener further includes a convex plate, which is provided at the edge of the third fastener and protrudes from the surface of the limiting plate. After the limiting plate is inserted into the limiting groove, the edge of the outer blocking portion can abut against the edge of the convex plate.

[0017] As an improvement to the above solution, an installation groove is further provided between the end of the insertion portion and the end of the outer blocking portion. The installation groove is provided at one end of the second fastener away from the limiting groove. The notch direction of the installation groove is opposite to the notch direction of the limiting groove, and the structural edge of the fixing hole can be inserted into the installation groove.

[0018] As an improvement to the above solution, the second fastener further includes a first rope-passing hole and a second rope-passing hole. The first rope-passing hole and the second rope-passing hole longitudinally penetrate the main body of the second fastener. The pulling rope of the shutter can pass through the first rope-passing hole into the second fastener and pass out of the second fastener through the second rope-passing hole.

[0019] As an improvement to the above solution, the first fastener further includes a first cross bar, a second cross bar and a third cross bar. A first winding hole is formed between the first cross bar and the second cross bar, and a second winding hole is formed between the second cross bar and the third cross bar. The first winding hole and the second winding hole are arranged adjacent to each other.

[0020] One end of the tape first winds around one side of the first fastener to form an initial outer layer, then winds from the initial outer layer around the outside of the first cross bar to form a first outer layer and passes through the second winding hole in a first direction, then winds around the second cross bar to form a first inner layer and passes through the first winding hole in a second direction, then winds around the first cross bar to form a second inner layer and winds around the outside of the first cross bar in a first direction and forms a third inner layer on the other side of the first cross bar. The tape extends from the third inner layer to the side of the second cross bar to form a second outer layer, extends to the side of the third cross bar to form a fourth inner layer, and finally winds around the outside of the third cross bar in a second direction and extends to the side of the first cross bar to form a third outer layer.

[0021] The present invention also provides a shutter, including the tape connecting device for the shutter as described above.

[0022] Implementing the present invention has the following beneficial effects: The tape connecting device for a blind of the present invention is provided with a first fastener, a second fastener, a third fastener and a rod. The first fastener, the second fastener and the third fastener can fix one end of the tape in the rod. During installation, first pass one end of the tape through the second fastener and wind it around the first fastener, so that one end of the tape is first fixed on the first fastener. Then the first fastener abuts against one side of the second fastener to complete the connection between the tape and the second fastener. Finally, the third fastener can be connected to the second fastener, and the third fastener is slidably connected to the rod, so that the second fastener can be fixed on the rod, thereby realizing the fixation of one end of the tape on the rod. Through the mutual connection of the first fastener, the second fastener and the third fastener, the number of winding loops of the tape can be reduced, the operation time of tying can be reduced, and through the mutual connection of the first fastener, the second fastener and the third fastener, the connection strength between the tape and the rod can be improved, and the installation operation is simple and not complicated. After installation, the first fastener, the second fastener and the third fastener can also be separately disassembled. Whether it is to hang the tape at the upper part of the tape or fix the tape at the lower part of the tape, good detachability can be achieved, which is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a partial disassembled structure of the blind of the present invention; Figure 2 is a schematic diagram of a disassembled structure of the tape connecting device for a blind of the present invention; Figure 3 is a schematic diagram of a sectional structure of the tape connecting device for a blind of the present invention; Figure 4 is Figure 3 a partial enlarged view of A in; Figure 5 is a schematic diagram of a sectional structure of the cooperation between the tape connecting device for a blind of the present invention and a drawstring; Figure 6 is a schematic diagram of a sectional structure of the tape wound around the first fastener of the present invention; Figure 7 is a schematic diagram of a sectional structure of the tape wound around the first fastener and cooperating with the second fastener of the present invention; Figure 8 is a schematic diagram of the structure of the blind of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the terms indicating orientations such as up, down, left, right, front, back, inside, and outside that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention and do not specifically limit the present invention.

[0025] See Figure 1 and Figure 2 , an embodiment of the present invention discloses a tape connection device for a shutter, which is used to hang or fix the tape 5 of the shutter. The tape connection device includes a first fastener 1 connected to the tape 5, a second fastener 2 in contact with the first fastener 1, a third fastener 3 connected to the second fastener 2, and a rod 4 provided on the shutter and connected to the third fastener 3. The tape 5 is used to connect each blade and can control the lifting of the blades. The rod 4 can be the bottom rod 4 of the shutter. In this structure, the bottom end of the tape 5 is connected to the rod 4, and the rod 4 moves up and down following the tape 5. The rod 4 fixes the lower part of the tape 5 to prevent the tape 5 from loosening. In other embodiments, the rod 4 can also be the upper rod 4 of the hanging curtain shutter. In this structure, the upper end of the tape 5 is connected to the rod 4, and the rod 4 suspends the tape 5 through the tape connection device. The rod 4 is stationary, and the movement of the tape 5 does not affect the rod 4. By using the first fastener 1, the end of the tape 5 can be fixed to the second fastener 2. By using the second fastener 2 and the third fastener 3, the tape 5 can be connected to the rod 4.

[0026] Specifically, one end of the tape 5 passes through the second fastener 2 and is wound around the first fastener 1. The first fastener 1 is used to fixedly connect the end of the tape 5. Then, the first fastener 1 abuts against one side of the second fastener 2 to fix one end of the tape 5 in the second fastener 2, thereby connecting the tape 5 to the second fastener 2. To further improve the connection stability, the third fastener 3 is slidably connected to the rod 4. The third fastener 3 can form a movable connection with the rod 4, and the third fastener 3 can be connected to the second fastener 2 to fix the second fastener 2 to the rod 4.

[0027] During installation, one end of the tape 5 first passes through the second fastener 2 and is wound around the first fastener 1. The end of the tape 5 is preliminarily fixed through the winding action of the first fastener 1. Subsequently, the first fastener 1 abuts against one side of the second fastener 2, so that the tape 5 forms an abutting fixation between the contact surfaces of the second fastener 2 and the first fastener 1, avoiding problems of rotation or sliding of the tape 5 caused by its cross-sectional shape (such as a traditional round drawstring). The third fastener 3 and the rod 4 are connected by a sliding connection to achieve position adjustment and can be fixed to the second fastener 2 by a clamping method, thereby locking the fixed end of the tape 5 to the rod 4 as a whole.

[0028] Compared with the existing methods of directly tying or using a plug buckle 323 for a drawstring, through the modular cooperation of the first fastener 1, the second fastener 2, and the third fastener 3, this device greatly reduces the complex winding steps required for traditional tying. For example, a traditional round rope is prone to rotation due to its cross-sectional shape and needs to be tied multiple times for reinforcement, while this device only requires a single winding to achieve a stable connection through a fixing method combining winding and clamping, significantly shortening the operation time and reducing the safety risk caused by loose tying. In addition, the sliding connection design between the third fastener 3 and the rod 4 allows for flexible position adjustment after installation and also supports quick disassembly and maintenance, solving the problem that it is difficult to replace or repair a traditional fixed structure (such as screw fastening or an embedded plug) individually. In terms of load-bearing performance, the clamping structure of the second fastener 2 and the third fastener 3 disperses the load by increasing the contact area (such as a flat fastener design), avoiding local stress concentration caused by the small cross-section of a traditional round drawstring, thereby enhancing the overall connection reliability and tensile strength. At the same time, the winding and fixing method of the first fastener 1 avoids the limitation of traditional tying relying on the friction of the knot. Through the dual effects of mechanical clamping and sliding locking, it ensures that the tape 5 is not easily loosened or deformed during long-term use.

[0029] The beneficial effects of the embodiments of the present invention are as follows: The tape connecting device for a louver in an embodiment of the present invention is provided with a first fastener 1, a second fastener 2, a third fastener 3 and a rod 4. The first fastener 1, the second fastener 2 and the third fastener 3 can fix one end of a tape 5 to the rod 4. During installation, first pass one end of the tape 5 through the second fastener 2 and wind it around the first fastener 1, so that one end of the tape 5 is first fixed to the first fastener 1. Then the first fastener 1 abuts against one side of the second fastener 2 to complete the connection between the tape 5 and the second fastener 2. Finally, the third fastener 3 can be connected to the second fastener 2, and the third fastener 3 is slidably connected to the rod 4, so that the second fastener 2 can be fixed to the rod 4, and further one end of the tape 5 can be fixed to the rod 4. Through the mutual connection of the first fastener 1, the second fastener 2 and the third fastener 3, the number of winding knots of the tape 5 can be reduced, the operation time of knotting can be reduced, and through the mutual connection of the first fastener 1, the second fastener 2 and the third fastener 3, the connection strength between the tape 5 and the rod 4 can be improved, and the installation operation is simple and not complicated. After installation, the first fastener 1, the second fastener 2 and the third fastener 3 can also be separately disassembled, realizing good disassembly performance and facilitating later maintenance.

[0030] See Figure 2 , the second fastener 2 includes a tape passing hole 21, and the tape passing hole 21 longitudinally penetrates the main body of the second fastener 2. One end of the tape 5 can pass through the tape passing hole 21 and be connected to the first fastener 1. The length of the cross-section of the tape passing hole 21 is greater than the width of the tape 5. Since the lateral dimension of the tape passing hole 21 is greater than the width of the tape 5, the tape 5 can freely adjust its position in the tape passing hole 21 in the lateral direction, avoiding local stress concentration caused by the deviation of the tape 5. After one end of the tape 5 is wound around the first fastener 1, the overall thickness formed by the tape 5 and the first fastener 1 can be greater than the width of the tape passing hole 21, so as to form an interference fit and provide a certain limiting effect. Compared with the defect that the circular drawstring is easy to rotate in the string passing hole in the prior art, through the optimization of the lateral dimension of the tape passing hole 21 in this design, it is adapted to flat tapes 5 with different widths (such as nylon tapes or fabric tapes), enhances the anti-torsion performance, and avoids the tension imbalance caused by the rotation of the tape 5.

[0031] The first fastener 1 includes a limiting arm 11 which extends from both sides. The horizontal length of the limiting arm 11 is greater than the cross-sectional length of the belt-passing hole 21. The limiting arm 11 can abut against the side of the belt-passing hole 21, that is, the bottom surface of the second fastener 2. When the first fastener 1 abuts against the side of the belt-passing hole 21 of the second fastener 2, the end of the limiting arm 11 extends beyond the edge of the belt-passing hole 21 to form a lateral limiting block. This design prevents problems such as shrinkage and unfastening of the first fastener 1 in the belt-passing hole 21 through mechanical limiting, avoiding the unwinding or skewing of the winding belt 5 caused by external pulling force. During the lifting and lowering of the shutter, the abutment between the limiting arm 11 and the side of the belt-passing hole 21 can disperse the load transmitted by the winding belt 5, reduce the dependence on a single fixed point, and improve the tensile strength and durability of the overall connection structure.

[0032] See Figure 2 , in order to connect the third fastener 3 with the rod 4, the third fastener 3 includes a folding arm 32. The folding arm 32 includes a sliding strip 321 which protrudes outward from both sides of the third fastener 3. A sliding groove 41 matching the sliding strip 321 is provided on the surface of the rod 4. The sliding groove 41 is recessed inward. The sliding strip 321 can be inserted into the sliding groove 41 and slide within the sliding groove 41. During installation, first remove the end of the rod 4, embed the sliding strip 321 into the sliding groove 41, and then fix the end of the rod 4 so that the third fastener 3 will not come out of the end of the sliding groove 41. The sliding groove 41 can form a horizontal limit for the sliding strip 321, and the third fastener 3 can only slide within the sliding groove 41. Compared with the defect that a traditional circular pull rope is easy to rotate within a slide rail, this design restricts the sliding direction to a single axis through the cooperation of the sliding strip 321 and the sliding groove 41, effectively eliminating the skewing problem caused by the cross-sectional shape.

[0033] See Figure 1 , a fixing hole 421 is provided in the rod 4. The second fastener 2 includes an insertion part 22 and an outer blocking part 23. The insertion part 22 can be inserted into the fixing hole 421, and the fixing hole 421 can form a limit and fixation for the insertion part 22. The outer blocking part 23 can block the fixing hole 421, and the outer blocking part 23 can stably abut against the rod 4 through the third fastener 3. After the insertion part 22 is inserted into the fixing hole 421, the third fastener 3 can slide to the position of the second fastener 2 and be connected to the second fastener 2. The third fastener 3 and the second fastener 2 are connected through a quick-release clamping structure.

[0034] See Figure 2, a limiting groove 24 is provided between the end of the insertion part 22 and the end of the outer blocking part 23. A limiting plate 31 is provided on the third fastener 3. The limiting plate 31 is arranged between the two folding arms 32. After the third fastener 3 slides to the position of the second fastener 2, the limiting plate 31 can be inserted into the limiting groove 24. At this time, the folding arms 32 surround both sides of the second fastener 2. This design forms a double fixation through the mechanical locking of the limiting plate 31 and the limiting groove 24: on the one hand, the insertion of the limiting plate 31 into the limiting groove 24 can prevent the relative displacement of the second fastener 2 and the third fastener 3 in the vertical direction; on the other hand, the lateral wrapping of the folding arms 32 around the second fastener 2 further restricts the lateral offset, ensuring the overall stability of the connection structure. Compared with the fixing method that only relies on friction or a simple buckle 323 in the traditional louver pull cord system, this solution significantly improves the tensile strength and anti-vibration performance through the combination of geometric limiting and a wrapping structure.

[0035] See Figure 3 and Figure 4 , the folding arm 32 further includes a folding plate 322. The folding plate 322 is arranged on the inner side of the folding arm 32 and extends towards the inner side of the third fastener 3. After the third fastener 3 slides to the position of the second fastener 2, the inner side of the folding plate 322 can be in contact with the side wall of the insertion part 22 or be located at the side part of the insertion part 22. Through the lateral contact between the folding plate 322 and the insertion part 22, an additional support surface is formed to further fix the second fastener 2, thereby effectively preventing the movement of the winding belt 5 due to side limit and avoiding the loosening of the connection of the second fastener 2 caused by the swinging of the louvers.

[0036] See Figure 2The inner side of the folding plate 322 is provided with a buckle 323, the buckle 323 protrudes from the inner side of the folding plate 322 toward the inner side of the third fastener 3, the outer surface of the buckle 323 is curved, the side of the insertion portion 22 is provided with a slot 221, the slot 221 is recessed in the surface of the insertion portion 22, the inner surface of the slot 221 is curved, and after the third fastener 3 slides to the position of the second fastener 2, the buckle 323 can be inserted into the slot 221. The connection between the buckle 323 and the slot 221 can achieve a quick-release connection. During installation, the third fastener 3 is slid to the position of the second fastener 2, and the buckle 323 can be automatically buckled into the slot 221, and the slot 221 forms a horizontal limit for the buckle 323. Moreover, unlike the traditional right-angle buckle 323, the curved structure is used, which is conducive to reducing sliding friction on the one hand, facilitating the insertion of the buckle 323 into the slot 221, and on the other hand, it can strengthen the fit between the buckle 323 and the slot 221 to ensure the connection stability, and on the other hand, it can also reduce local stress concentration and reduce the risk of material wear. The buckle 323 embedded structure supports non-destructive disassembly, and the second buckle 2 can be separated by sliding the third buckle 3 in the opposite direction, which is convenient for replacing the tape 5 or repairing parts, and convenient for maintenance.

[0037] See also Figure 4 The folding arm 32 further comprises a connecting plate 324, which is connected between the slide bar 321 and the folding plate 322. The slide bar 321 of the folding arm 32 and the folding plate 322 are transitioned through the connecting plate 324. The longitudinal section of the folding plate 322, the connecting plate 324 and the slide bar 321 forms a "Z" shape. A boss 42 is provided in the middle of the rod 4, and the boss 42 protrudes from the surface of the slide groove 41. The fixing hole 421 is provided on the boss 42. The connecting plates 324 on both sides of the limit plate 31 can surround both sides of the boss 42. During installation, after the slide bar 321 of the third fastener 3 is embedded in the slide groove 41, the connecting plate 324 is close to the side of the boss 42, so that the wrapping range of the "Z"-shaped folding arm 32 is adapted to the thickness of the boss 42. For example, when the third fastener 3 slides to the position of the second fastener 2, the connecting plate 324 forms a barrier on both sides of the boss 42, which not only limits the lateral displacement of the third fastener 3, but also disperses the load transmitted by the roll 5 through the "Z"-shaped multiple-stage bending, thereby improving the connection strength and limiting effect. The "Z"-shaped structure of the embodiment of the present invention absorbs stress through geometric deformation, improves the bending resistance, and adapts to the installation requirements of bosses 42 of different thicknesses.

[0038] See also Figure 2, the third fastener 3 further includes a convex plate 33, which is provided at the edge of the third fastener 3 and protrudes from the surface of the limiting plate 31. After the limiting plate 31 is inserted into the limiting groove 24, the edge of the outer blocking portion 23 can abut against the edge of the convex plate 33. This design restricts the relative displacement of the second fastener 2 and the third fastener 3 in the horizontal direction through the blocking effect of the convex plate 33, forming a double lock: the vertical direction is restricted by the limiting groove 24 and the limiting plate 31, and the horizontal direction is restricted by the abutment of the convex plate 33 and the outer blocking portion 23.

[0039] An installation groove 25 is further provided between the end of the insertion portion 22 and the end of the outer blocking portion 23. The installation groove 25 is provided at one end of the second fastener 2 away from the limiting groove 24. The notch direction of the installation groove 25 is opposite to the notch direction of the limiting groove 24. The structural edge of the fixing hole 421 can be inserted into the installation groove 25. When installing the second fastener 2, first place the second fastener 2 so that the outer end of the outer blocking portion 23 abuts against the surface of the rod 4 obliquely, and then insert one end of the insertion portion 22 into the fixing hole 421 obliquely. At this time, the structural edge of the fixing hole 421 can be inserted into the installation groove 25 to form a preliminary positioning of the second fastener 2, and then the second fastener 2 is gradually laid flat, and the remaining part of the insertion portion 22 is inserted into the fixing hole 421. The notch direction of the installation groove 25 provides guidance for the insertion action to ensure the quick alignment of the insertion portion 22 and the fixing hole 421; while the reverse design of the limiting groove 24 and the installation groove 25 is used to prevent the second fastener 2 from rotating or tilting when stressed.

[0040] See Figure 5 , the second fastener 2 can be used to fix the drawstring 6 of the shutter at the same time. Specifically, the second fastener 2 further includes a first drawstring hole 26 and a second drawstring hole 27 for fixing the drawstring 6 of the shutter. The drawstring 6 is used to fix to both sides of the shutter and control the flipping and opening and closing of the shutter. The first drawstring hole 26 and the second drawstring hole 27 longitudinally penetrate the main body of the second fastener 2. The drawstring 6 of the shutter can pass through the first drawstring hole 26 into the second fastener 2 and pass through the second drawstring hole 27 out of the second fastener 2, thereby forming a connection with the second fastener 2 and fixing the drawstring 6 to the rod 4.

[0041] See Figure 6 and Figure 7, in order to fix one end of the tape 5, the first fastener 1 further includes a first cross bar 13, a second cross bar 14 and a third cross bar 15. A first winding hole 16 is formed between the first cross bar 13 and the second cross bar 14, and a second winding hole 17 is formed between the second cross bar 14 and the third cross bar 15. The first winding hole 16 and the second winding hole 17 are arranged adjacent to each other. The limiting arms 11 extend outward from both ends of the first cross bar 13.

[0042] See Figure 6 and Figure 7 , during installation, one end of the tape 5 first winds around one side of the first fastener 1 to form an initial outer layer 51. The initial outer layer 51 is directly in contact connection with the tape passing hole 21, then winds around the outside of the first cross bar 13 to form a first outer layer 52 and passes through the second winding hole 17 in a first direction. After that, it winds around the second cross bar 14 to form a first inner layer 53 and passes through the first winding hole 16 in a second direction. Then it winds around the first cross bar 13 to form a second inner layer 54 and winds around the outside of the first cross bar 13 in a first direction and forms a third inner layer 55 on the other side of the first cross bar 13. The tape 5 extends from the third inner layer 55 to the side of the second cross bar 14 in sequence to form a second outer layer 56, extends to the side of the third cross bar 15 to form a fourth inner layer 57, and finally winds around the outside of the third cross bar 15 in a second direction and extends to the side of the first cross bar 13 to form a third outer layer 58. The third outer layer 58 and the initial outer layer 51 are directly in contact with both sides of the tape passing hole 21. Through the above multi-segment reciprocating winding, the tape 5 forms an "S"-shaped winding path among the three cross bars of the first fastener 1, and at the same time can wind the first cross bar 13, the second cross bar 14 and the third cross bar 15. By using the staggered layout of the cross bars and the tape passing hole 21, the contact area and friction force between the tape 5 and the fastener are increased, and at the same time the part of the tape 5 on the first fastener 1 is thickened, so that this part can be in interference fit with the tape passing hole 21.

[0043] Further, the limiting arms 11 extend outward from both ends of the first cross bar 13, that is, at least the first cross bar 13 is located outside the tape passing hole 21, and the second cross bar 14 and / or the third cross bar 15 are located inside the tape passing hole 21. After the above winding, the tape roll 5 forms 2-layer and 3-layer structures on one side and the other side of the first cross bar 13 respectively, which can increase the thickness of the part where the first cross bar 13 is located. Also, 2-layer and 3-layer structures can be formed on one side and the other side of the second cross bar 14 respectively, and the positions of the 2-layer and 3-layer structures are opposite to those of the 2-layer and 3-layer structures of the first cross bar 13, forming an "S"-shaped bending structure as a whole. Both sides of the third cross bar 15 are 1-layer structures. Therefore, the part of the tape roll 5 located outside the tape passing hole 21 is thicker, and the part of the tape roll 5 located inside the tape passing hole 21 is thinner, forming a trapezoidal structure that is not easy to loosen. At the same time, since the tape roll 5 on the first cross bar 13 and the tape roll 5 on the second cross bar 14 form an "S"-shaped bending structure as a whole, the stability of the tape roll 5 in the tape passing hole 21 is further improved.

[0044] See Figure 8 , an embodiment of the present invention also discloses a shutter, including the tape connecting device for the shutter as described above. The tape connecting device for the shutter includes a first fastener 1, a second fastener 2, a third fastener 3 and a rod 4. The first fastener 1, the second fastener 2 and the third fastener 3 can fix one end of the tape roll 5 to the rod 4. During installation, first pass one end of the tape roll 5 through the second fastener 2 and wind it around the first fastener 1, so that one end of the tape roll 5 is first fixed to the first fastener 1. Then the first fastener 1 abuts against one side of the second fastener 2 to complete the connection between the tape roll 5 and the second fastener 2. Finally, the third fastener 3 can be connected to the second fastener 2, and the third fastener 3 is slidably connected to the rod 4, so that the second fastener 2 can be fixed to the rod 4, and further one end of the tape roll 5 can be fixed to the rod 4. Through the mutual connection of the first fastener 1, the second fastener 2 and the third fastener 3, the number of winding and tying loops of the tape roll 5 can be reduced, and the tying operation time can be reduced. Moreover, through the mutual connection of the first fastener 1, the second fastener 2 and the third fastener 3, the connection strength between the tape roll 5 and the rod 4 can be improved, and the installation operation is simple and not complicated. After installation, the first fastener 1, the second fastener 2 and the third fastener 3 can also be separately disassembled, achieving good detachability and facilitating later maintenance.

[0045] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A tape connecting device for a blind, which is used to hang or fix the tape of the blind, and is characterized in that, It includes a first fastener connected to the winding belt, a second fastener in contact with the first fastener, a third fastener connected to the second fastener, and a rod provided on the shutter and connected to the third fastener; One end of the winding belt passes through the second fastener and is wound in the first fastener. The first fastener abuts against one side of the second fastener to fix one end of the winding belt in the second fastener; The third fastener is slidably connected to the rod, and the third fastener can be connected to the second fastener to fix the second fastener on the rod.

2. The tape connection device for a blind according to claim 1, characterized in that, The second fastener includes a belt-passing hole which longitudinally penetrates the main body of the second fastener. One end of the winding belt can pass through the belt-passing hole and be connected to the first fastener; The length of the cross-section of the belt-passing hole is greater than the width of the winding belt.

3. The tape connecting device for a blind according to claim 2, characterized in that, The first fastener includes a limiting arm which extends from both sides. The horizontal length of the limiting arm is greater than the length of the cross-section of the belt-passing hole, and the limiting arm can abut against the side of the belt-passing hole.

4. The tape connecting device for a blind according to claim 1, characterized in that, The third fastener includes a folding arm which includes a sliding strip. The sliding strip protrudes outward from both sides of the third fastener. A sliding groove is provided on the surface of the rod, and the sliding groove is recessed inward. The sliding strip can be inserted into the sliding groove and slide in the sliding groove.

5. The tape connecting device for a blind according to claim 4, characterized in that, A fixing hole is provided in the rod. The second fastener includes an insertion part and an outer blocking part. The insertion part can be inserted into the fixing hole, and the outer blocking part can block the fixing hole; after the insertion part is inserted into the fixing hole, the third fastener can slide to the position of the second fastener and be connected to the second fastener.

6. The tape connection device for a blind according to claim 5, characterized in that, A limiting groove is provided between the end of the insertion part and the end of the outer blocking part. A limiting plate is provided on the third fastener and is arranged between the two folding arms. After the third fastener slides to the position of the second fastener, the limiting plate can be inserted into the limiting groove. At this time, the folding arms surround both sides of the second fastener.

7. The tape connection device for a blind according to claim 6, characterized in that, The folding arm further includes a folding plate which is arranged on the inner side of the folding arm and extends towards the inner side of the third fastener. After the third fastener slides to the position of the second fastener, the inner side of the folding plate can abut against the side wall of the insertion part or be located at the side of the insertion part.

8. The tape connection device for a blind according to claim 7, characterized in that, A buckle is provided on the inner side of the folding plate. The buckle protrudes from the inner side of the folding plate towards the inner side of the third fastener. The outer surface of the buckle is arc-shaped. A clamping groove is provided on the side of the insertion part, and the clamping groove is recessed on the surface of the insertion part. The inner surface of the clamping groove is arc-shaped. After the third fastener slides to the position of the second fastener, the buckle can be inserted into the clamping groove.

9. The tape connection device for a blind according to claim 7, characterized in that, The folding arm further includes a connecting plate which is connected between the sliding strip and the folding plate. The longitudinal sections of the folding plate, the connecting plate and the sliding strip form a "Z" shape. A convex platform is provided in the middle of the rod, and the convex platform protrudes from the surface of the sliding groove. The fixing hole is provided on the convex platform. The connecting plates on both sides of the limiting plate can surround both sides of the convex platform.

10. The tape connecting device for a blind according to claim 6, characterized in that, The third fastener further includes a convex plate, which is arranged at the edge of the third fastener and protrudes from the surface of the limiting plate. After the limiting plate is inserted into the limiting groove, the edge of the outer blocking portion can abut against the edge of the convex plate.

11. The tape connection device for a blind according to claim 6, characterized in that, An installation groove is further provided between the end of the insertion portion and the end of the outer blocking portion. The installation groove is arranged at one end of the second fastener away from the limiting groove. The notch direction of the installation groove is opposite to the notch direction of the limiting groove. The structural edge of the fixing hole can be inserted into the installation groove.

12. The tape connection device for a blind according to claim 1, characterized in that, The second fastener further includes a first rope-passing hole and a second rope-passing hole. The first rope-passing hole and the second rope-passing hole longitudinally penetrate through the main body of the second fastener. The pull rope of the shutter can pass through the first rope-passing hole and penetrate into the second fastener and then pass out of the second fastener through the second rope-passing hole.

13. The tape connection device for a blind according to claim 1, characterized in that, The first fastener further includes a first horizontal bar, a second horizontal bar and a third horizontal bar. A first winding hole is formed between the first horizontal bar and the second horizontal bar, and a second winding hole is formed between the second horizontal bar and the third horizontal bar. The first winding hole and the second winding hole are arranged adjacent to each other.

14. The tape connecting device for a blind according to claim 13, characterized in that, One end of the tape first winds around one side of the first fastener to form an initial outer layer, then winds from the initial outer layer around the outside of the first horizontal bar to form a first outer layer and passes through the second winding hole in a first direction, then winds around the second horizontal bar to form a first inner layer and passes through the first winding hole in a second direction, then winds around the first horizontal bar to form a second inner layer and winds around the outside of the first horizontal bar in a first direction to form a third inner layer on the other side of the first horizontal bar. The tape extends from the third inner layer to the side of the second horizontal bar to form a second outer layer, extends to the side of the third horizontal bar to form a fourth inner layer, and finally winds around the outside of the third horizontal bar in a second direction and extends to the side of the first horizontal bar to form a third outer layer.

15. A kind of shutter, characterized in that, Comprising a tape connecting device for a shutter according to any one of claims 1-14.

Images