Rolling type cloth spreading device

Abstract

The utility model discloses a rolling type cloth spreading device which comprises a first long rod, a first channel extending in the length direction of the first long rod is arranged in the first long rod, and a rotating shaft rod extending in the length direction of the first long rod is rotatably arranged in the first channel. An annular space capable of containing at least part of the spread cloth is defined between the rotating shaft rod and the inner circumferential wall of the first channel, an inlet and outlet extending in the length direction of the first long rod and communicated with the annular space is formed in the side portion of the first long rod, and the rotating shaft rod is used for being connected with the edge of one side of the spread cloth so that the spread cloth can be rolled in the annular space or stretch out of the inlet and outlet. When the exhibition cloth needs to be stored, a user rotates the rotating shaft rod so that the exhibition cloth can be rolled on the periphery of the rotating shaft rod, and the exhibition cloth retracts into the annular space from the inlet and outlet, so that the exhibition cloth is prevented from being exposed and stained or damaged; when the display cloth needs to be unfolded, the rotating shaft rod is rotated so that the display cloth can be unwound from the rotating shaft rod, the display cloth can stretch out of the annular space from the inlet and outlet, and storage and unfolding are very convenient.

Description

Technical Field

[0001] The utility model relates to a winding type spreading device. Background Art

[0002] At present, some spreading devices are installed in a hanging manner. An upper edge of the spread is connected by a rod, and a lower edge of the spread naturally sags under the action of gravity, or the lower edge of the spread is connected with another rod, and the gravity of the lower rod is used to assist the spread to sag naturally, or the two ends of the two rods are stretched by ropes to unfold the spread. When the spreading device needs to be stored, after the spread is wound around the outer circumference of the rod for multiple turns, the spread is fixed on the rod by using a cable tie. Such a winding method is neither convenient nor can it prevent the spread from being exposed and easily soiled or damaged, and the length dimension after storage is relatively long. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, one of the purposes of the utility model is to provide a winding type spreading device that protects the spread during storage and conveniently stores the spread.

[0004] A winding type spreading device according to an embodiment of the utility model includes: a first long rod, a first channel extending along its length direction is provided inside the first long rod, a rotating shaft rod extending along the length direction of the first long rod is rotatably arranged in the first channel, an annular space for accommodating at least part of the spread is defined between the rotating shaft rod and the inner peripheral wall of the first channel, an inlet and outlet extending along the length direction of the first long rod and communicating with the annular space is provided on the side of the first long rod, and the rotating shaft rod is used for connecting one side edge of the spread so that the spread is wound in the annular space or extends out from the inlet and outlet.

[0005] A winding type spreading device according to an embodiment of the utility model has at least the following beneficial effects:

[0006] When the winding type spreading device with the above structure needs to be stored, the user rotates the rotating shaft rod to wind the spread around the outer circumference of the rotating shaft rod, and the spread retracts from the inlet and outlet into the interior of the annular space, thereby preventing the spread from being exposed and soiled or damaged; when the winding type spreading device needs to be unfolded, the rotating shaft rod is rotated to unwind the spread from the rotating shaft rod, and the spread can extend out of the annular space from the inlet and outlet, and both storage and unfolding are very convenient.

[0007] In some embodiments of the utility model, a rotation positioning component for locking and unlocking the angular position of the rotating shaft rod is provided between the first long rod and the rotating shaft rod.

[0008] In some embodiments of the present utility model, the rotation positioning assembly includes a ratchet wheel fixedly provided at at least one end of the rotating shaft rod, a pawl provided on the first long rod and adapted to the ratchet wheel, and an elastic member for driving the pawl to engage with the ratchet wheel.

[0009] In some embodiments of the present utility model, a sliding installation groove is axially provided through the rotating shaft rod, a communication port connecting the sliding installation groove with the annular space is provided on the side wall of the rotating shaft rod, limiting rod portions are connected to opposite side edges of the spread, one of the limiting rod portions is inserted into the sliding installation groove, and the width dimension of the communication port is smaller than the width dimension of the sliding installation groove to prevent the corresponding limiting rod portion from disengaging from the sliding installation groove.

[0010] In some embodiments of the present utility model, the first long rod is detachably connected by multiple unit tubes, the rotating shaft rod is detachably connected by multiple unit rods, the limiting rod portion is composed of a steel cable, a cloth sleeve for the steel cable to movably pass through is provided on the side edge of the spread, the steel cable can be drawn out along the sliding installation groove, a unit channel for the unit rod to movably pass through is provided inside each unit tube, and a part of the annular space is defined between the unit channel and the corresponding unit rod.

[0011] In some embodiments of the present utility model, multiple unit tubes are arranged in sequence, a first movable member is provided inside the unit tube at the starting end, a tightening and loosening assembly is provided on the unit tube at the end, a first rope is connected between the tightening and loosening assembly and the first movable member and sequentially passes through the interiors of all the unit tubes, the tightening and loosening assembly tightens the first rope so that all the unit tubes are sequentially abutted and arranged in a straight line, and the tightening and loosening assembly loosens the first rope so that all the unit tubes can be folded to form a parallel state.

[0012] In some embodiments of the present utility model, the tightening and loosening assembly includes a second movable member movably provided inside the unit tube at the end, one end of the first rope away from the first movable member is connected to the second movable member, an adjusting screw rod is rotatably provided at the end of the unit tube at the end, the head of the adjusting screw rod exposes out of the end of the unit tube, and a nut member adapted to the adjusting screw rod is fixedly provided on the second movable member.

[0013] In some embodiments of the utility model, two adjacent sections of the unit tubes are detachably connected via a second connecting block, one end of the second connecting block is fixed to the end of one of the unit tubes, and the other end of the second connecting block can be detachably plugged into the other section of the unit tube, the interior of the second connecting block is penetrated by a threading hole located inside the unit tube, the first rope passes through the threading hole, the second connecting block is provided with a clearance hole for the rotating shaft rod to movably pass through, and the ends of the unit tubes located at the starting end and the end end are provided with a third connecting block, and the third connecting block is provided with an axial hole for the end of the rotating shaft rod to be rotatably set.

[0014] In some embodiments of the utility model, a plurality of sections of the unit rods are arranged in sequence, and a second rope is provided between the unit rod at the starting end and the unit rod at the end end, which passes through the interior of all the unit rods in sequence, and the length of the second rope or the elasticity of the second rope can be stretched to satisfy the requirement of folding all the unit rods into a state parallel to each other.

[0015] In some embodiments of the utility model, two adjacent sections of the unit rod are detachably connected via a first connecting block, one end of the first connecting block is fixed to the end of one section of the unit rod, and the other end of the first connecting block can be detachably plugged into the other section of the unit rod, and a threading channel located inside the unit rod is provided through the interior of the first connecting block, and the second rope passes through the threading channel.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the roll-up spreading device of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the embodiment in which the spread is removed and a cross section is made from the second connecting block;

[0020] Figure 3 for Figure 1 A schematic cross-sectional view of an embodiment;

[0021] Figure 4 for Figure 3 A partial enlarged schematic diagram of part A;

[0022] Figure 5 is Figure 3 a partially enlarged schematic view of part B;

[0023] Figure 6 is a schematic structural view of another embodiment of the coiling and spreading device of the present utility model;

[0024] Figure 7 is a schematic structural view of the first long rod in a folded and stored state.

[0025] Reference numerals:

[0026] Spreading 10; Limiting rod part 11; Cloth sleeve 12; First long rod 100; Import and export 101; Unit tube 110; Second connecting block 120; Third connecting block 130; Rotating shaft rod 200; Sliding installation groove 210; Communication port 220; Unit rod 230; First connecting block 240; Annular space 300; Rotating positioning component 400; Ratchet 410; Transmission hole 411; In-and-out groove 412; Pawl 420; Elastic member 430; First movable member 500; Tightening and loosening component 600; Second movable member 610; Adjusting screw 620; Nut member 630; First rope 700; Second rope 800; Second long rod 900. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that for the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and the understanding of "greater than", "less than", "exceeding", etc. does not include the present number, and the understanding of "above", "below", "within", etc. includes the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See Figures 1 to 4 , a winding and unfolding device of the present utility model includes: a first long rod 100, a first channel extending along the length direction is provided inside the first long rod 100, a rotating shaft rod 200 extending along the length direction of the first long rod 100 is rotatably provided in the first channel, an annular space 300 for accommodating at least part of the spread 10 is defined between the rotating shaft rod 200 and the inner peripheral wall of the first channel, an inlet / outlet 101 extending along the length direction and communicating with the annular space 300 is provided on the side of the first long rod 100, and the rotating shaft rod 200 is used to connect one side edge of the spread 10 so that the spread 10 is wound in the annular space 300 or extends out from the inlet / outlet 101.

[0032] When the winding and unfolding device with the above structure needs to be stored, the user rotates the rotating shaft rod 200 to wind the spread 10 around the outer periphery of the rotating shaft rod 200, and the spread 10 retracts from the inlet / outlet 101 into the interior of the annular space 300, thereby preventing the spread 10 from being exposed and soiled or damaged; when the winding and unfolding device needs to be unfolded, the rotating shaft rod 200 is rotated to unwind the spread 10 from the rotating shaft rod 200, and the spread 10 can extend out of the annular space 300 from the inlet / outlet 101, and both storage and unfolding are very convenient.

[0033] See Figure 1 , in some embodiments of the present utility model, in order to prevent the spread 10 from being accidentally unwound due to the self-rotation of the rotating shaft rod 200 after the spread 10 is wound around the rotating shaft rod 200, and also to prevent the spread 10 from being accidentally wound due to accidental contact with the rotating shaft rod 200 after the spread 10 is unwound from the rotating shaft rod 200, a rotation positioning assembly 400 for locking and unlocking the angular position of the rotating shaft rod 200 is provided between the first long rod 100 and the rotating shaft rod 200.

[0034] See Figure 1 and Figure 4, in some embodiments of the present utility model, the rotation positioning assembly 400 includes a ratchet wheel 410 fixedly provided at at least one end of the rotating shaft rod 200, a pawl 420 provided on the first long rod 100 and adapted to the ratchet wheel 410, and an elastic member 430 for driving the pawl 420 to engage with the ratchet wheel 410. It can be understood that when the rotating shaft rod 200 drives the ratchet wheel 410 to rotate together in the clockwise direction of the winding and spreading 10, the pawl 420 automatically jumps and engages with each tooth of the ratchet wheel 410 under the action of the elastic member 430. If the spreading 10 is pulled outwards from the inlet and outlet 101 under force, the pawl 420 prevents the rotating shaft rod 200 from rotating in the clockwise direction of unwinding the spreading 10 under the action of the elastic member 430, thereby playing a role in locking the angular position of the rotating shaft rod 200; and when it is necessary to release the spreading 10, it is necessary to manually apply a force to the pawl 420 in the direction of compressing the elastic member 430 to separate the pawl 420 from the ratchet wheel 410. At this time, the spreading 10 can be pulled outwards from the inlet and outlet 101 or the spreading 10 can be released by rotating the rotating shaft rod 200. The locking and unlocking operations of the rotation positioning assembly 400 on the rotating shaft rod 200 are very simple and the structure is simple. Of course, in other embodiments, the rotation positioning assembly 400 can also be replaced with a rubber damping member etc. provided between the end of the rotating shaft rod 200 and the first long rod 100.

[0035] See Figure 1 , Figure 2 and Figure 4 , in some embodiments of the present utility model, a sliding installation groove 210 is axially penetrated through the rotating shaft rod 200, a communication port 220 is provided on the side wall of the rotating shaft rod 200 to communicate the sliding installation groove 210 with the annular space 300, limiting rod portions 11 are connected to opposite side edges of the spreading 10, and one of the limiting rod portions 11 penetrates through the sliding installation groove 210. The width dimension of the communication port 220 is smaller than the width dimension of the sliding installation groove 210 to prevent the corresponding limiting rod portion 11 from disengaging from the sliding installation groove 210. Among them, both the communication port 220 and the inlet and outlet 101 extend along the length direction of the sliding installation groove 210. When assembling the spreading 10, first insert one of the limiting rod portions 11 into one end of the sliding installation groove 210. During this process, the spreading 10 moves in place in the communication port 220 and the inlet and outlet 101 along the length direction of the first long rod 100, and the other limiting rod portion 11 extends out from the inlet and outlet 101. See Figure 1 In the embodiment of, the limiting rod portion 11 extending out from the inlet and outlet 101 drives the spreading 10 to be straightened downwards under its own gravity, and can be used to display graphic and text content or as a projection screen etc. When the spreading 10 is wound up, the limiting rod portion 11 abuts against the inlet and outlet 101 and does not completely retract into the interior of the annular space 300, thus facilitating the user to grab the limiting rod portion 11 to pull out the spreading 10. SeeFigure 6 In the embodiment, the limiting rod portion 11 extending from the inlet / outlet 101 is installed on the second long rod 900. The structure of the second long rod 900 is exactly the same as that of the first long rod 100, so that the opposite sides of the spread 10 can be respectively folded into the interiors of the first long rod 100 and the second long rod 900. The cross-sectional areas of the first long rod 100 and the second long rod 900 can be designed to be relatively small specifications, and under the action of the gravity of the second long rod 900, it helps to further prevent the spread 10 from wrinkling.

[0036] Among them, the sliding installation groove 210 is adapted to the shape of the limiting rod portion 11, that is, the width dimension of the communication port 220 is smaller than the radial dimension of the limiting rod portion 11 to prevent the spread 10 from falling off the rotating shaft rod 200. When it is necessary to replace or fold the spread 10, the limiting rod portion 11 can be pulled out from the sliding installation groove 210, and it is very convenient to disassemble and install the spread 10.

[0037] In addition, it should be noted that when the rotating shaft rod 200 is provided with the sliding installation groove 210 and the communication port 220, and the side of the first long rod 100 is provided with the inlet / outlet 101, in order to facilitate driving the rotating shaft rod 200 and the ratchet 410 to rotate, see Figure 1 and Figure 4 , in this embodiment, a hexagonal transmission hole 411 is provided at the center of the ratchet 410. By inserting a hexagon screwdriver into the transmission hole 411, the rotating shaft rod 200 and the ratchet 410 can be driven to rotate together. When the rotating shaft rod 200 cannot rotate, most of the spread 10 is stored in the annular space 300. At this time, the pawl 420 meshes with one of the ratchet teeth on the ratchet 410. Without unlocking the pawl 420, the angular position of the rotating shaft rod 200 will not change. In the presence of the ratchet 410, an access groove 412 communicating with the transmission hole is also penetrated along the thickness direction of the ratchet 410, and the size of the transmission hole 411 can also allow the limiting rod portion 11 to pass through the transmission hole 411 and penetrate into the sliding installation groove 210, so as to meet the disassembly and installation requirements between the spread 10 and the rotating shaft rod 200 while positioning the angular position of the rotating shaft rod 200. The structure is very simple, compact and ingenious.

[0038] See Figures 1 to 4, in some embodiments of the present utility model, the first long rod 100 is detachably connected by multiple unit tubes 110, the rotating shaft rod 200 is detachably connected by multiple unit rods 230, the limiting rod portion 11 is composed of a steel cable, a cloth sleeve 12 for the steel cable to movably pass through is provided at the side edge of the spread 10, the steel cable can be drawn out along the sliding installation groove 210, and a unit channel for the unit rod 230 to movably pass through is provided inside each unit tube 110, and a part of the annular space 300 is defined between the unit channel and the corresponding unit rod 230. It should be noted that the length dimensions of the first long rod 100 and the rotating shaft rod 200 are both relatively long. Although the spread 10 is wound inside the annular space 300, this winding type spread device is still not conducive to storage, transportation and carrying. At this time, with the above structure, the first long rod 100 can be disassembled into multiple unit tubes 110, and the rotating shaft rod 200 can be disassembled into multiple unit rods 230, thereby greatly reducing the overall length dimension of this winding type spread device.

[0039] In addition, before disassembling the first long rod 100 and the rotating shaft rod 200, first draw the spread 10 outwards along the length direction of the sliding installation groove 210 to completely leave the above-mentioned sliding installation groove 210, the communication port 220 and the access groove 412, and then draw the steel cable out of the cloth sleeve 12. At this time, the spread 10 can be folded into a rectangle with smaller length and width dimensions by referring to the way of folding a quilt, and the steel cable can be wound into a cylinder with a smaller diameter dimension, thereby saving the space for packaging and storage, so that the entire spread device can reduce the storage volume and is convenient for transportation, sales, etc.

[0040] See Figures 3 to 5, in some embodiments of the present utility model, multiple sections of the unit tubes 110 are arranged in sequence. A first movable member 500 is provided inside the unit tube 110 at the starting end, and a tightening and loosening assembly 600 is provided on the unit tube 110 at the ending end. A first rope 700 is connected between the tightening and loosening assembly 600 and the first movable member 500 and sequentially passes through the interiors of all the unit tubes 110. The tightening and loosening assembly 600 tightens the first rope 700 so that all the unit tubes 110 are sequentially abutted against each other and arranged in a straight line. The tightening and loosening assembly 600 loosens the first rope 700 so that all the unit tubes 110 can be folded to form a state parallel to each other. When it is necessary to assemble multiple sections of the unit tubes 110 together to form the first long rod 100 for use, the tightening and loosening assembly 600 drives the first movable member 500 to approach the tightening and loosening assembly 600 to tighten the first rope 700, and all the unit tubes 110 can be sequentially abutted and arranged in a straight line. When it is necessary to disassemble the first long rod 100 into multiple sections of the unit tubes 110 to reduce the length dimension, the tightening and loosening assembly 600 loosens the first rope 700, and the first rope 700 can be extended to a certain length dimension to meet the requirement that all the unit tubes 110 can be separated from each other and then folded to form a state parallel to each other, thereby reducing the storage volume. When reassembling multiple sections of the unit tubes 110 to form the first long rod 100, it is not necessary to select all the unit tubes 110 and assemble them one by one, which is beneficial to both quick folding and storage and quick deployment and use.

[0041] See Figure 3 and Figure 4, in some embodiments of the present utility model, the tightening assembly 600 includes a second movable member 610 movably disposed within the unit tube 110 at the end. One end of the first rope 700 away from the first movable member 500 is connected to the second movable member 610. An adjusting screw 620 is rotatably provided at the end of the unit tube 110 at the end, and the head of the adjusting screw 620 protrudes from the end of the unit tube 110. The second movable member 610 is fixedly provided with a nut member 630 adapted to the adjusting screw 620. It should be noted that when all the unit tubes 110 of the first long rod 100 need to be assembled, the user screws the head of the adjusting screw 620 to drive the second movable member 610 close to the head of the adjusting screw 620. During this process, the first movable member 500 moves within the unit tube 110 at the start end to be close to the end of another unit tube 110. At this time, the first movable member 500 cannot move further, and the first rope 700 connected between the first movable member 500 and the second movable member 610 is tightened. The end faces of two adjacent unit tubes 110 are pressed tightly together to form a linear and structurally stable first long rod 100. The tightening assembly 600 of this structure has a good tightening effect on the first rope 700, and the cooperation between the adjusting screw 620 and the nut member 630 prevents the first rope 700 from automatically loosening. When the first long rod 100 needs to be disassembled into multiple unit tubes 110 and folded for storage, the user screws the head of the adjusting screw 620 to drive the second movable member 610 away from the head of the adjusting screw 620. At this time, the first rope 700 connected between the first movable member 500 and the second movable member 610 becomes completely loose, and two adjacent unit tubes 110 can be separated along the length direction of the unit tube 110 and then folded to be parallel to each other. The part of the first rope 700 extending out of two adjacent unit tubes 110 is bent. When each unit tube 110 is folded and stored in a bundle, the extending path of the first rope 700 is serpentinely bent.

[0042] Specifically, the first rope 700 is preferably a rope with relatively weak tensile properties, such as a steel wire rope, which is beneficial for stably connecting. Of course, in other embodiments, the first rope 700 can also be a nylon rope, a braided rope, and so on.

[0043] See Figure 3 and Figure 5In some embodiments of the utility model, two adjacent sections of the unit tube 110 are detachably connected via a second connecting block 120, one end of the second connecting block 120 is fixed to the end of one of the unit tubes 110, and the other end of the second connecting block 120 can be detachably plugged into the other section of the unit tube 110, the interior of the second connecting block 120 is penetrated by a threading hole located inside the unit tube 110, the first rope 700 passes through the threading hole, the second connecting block 120 is provided with a clearance hole for the shaft rod 200 to movably pass through, and the ends of the unit tube 110 located at the starting end and the end end are both provided with a third connecting block 130, and the third connecting block 130 is provided with an axial hole for the end of the shaft rod 200 to be rotatably set. It can be understood that the two adjacent unit tubes 110 are plugged and matched by the second connection block 120, and the ends of the unit tubes 110 at both ends are connected to the rotation of the shaft rod 200 by the shaft hole on the third connection block 130. The shaft rod 200 and the first rope 700 pass through all the second connection blocks 120 along the length direction of the first long rod 100, wherein there is an annular gap between the shaft rod 200 and the clearance hole, and the gap is part of the annular space 300. Specifically, the unit tube 110 is a square tube, and the two ends of the second connection block 120 are square plugs matching the square tube. The side of one end of the second connection block 120 is fixed by passing through the square tube with a plurality of fastening screws. The square tube and the square plug cooperate to prevent the relative rotation between the two adjacent unit tubes 110, so that the structure of the first long rod 100 is stable after the assembly is completed. Preferably, the square tube and the square plug are tightly matched to prevent the relative movement between the two adjacent unit tubes 110.

[0044] See also Figure 2 In the above embodiment, in order to achieve the purpose of force balance and to improve the reliability of the rotation positioning assembly 400, a ratchet 410 is fixedly connected to both ends of the rotating shaft rod 200, and correspondingly, two corresponding pawls 420 and elastic members 430 are also configured at both ends of the first long rod 100. In this embodiment, the unit rod 230 has a slot arranged around the sliding installation groove 210, and the ratchet 410 has a plug-in tightly inserted into the slot.

[0045] See also Figure 2 and Figure 7, in some embodiments of the present utility model, multiple segments of the unit rods 230 are arranged in sequence, and a second rope 800 passing through the interiors of all the unit rods 230 in sequence is provided between the unit rod 230 at the starting end and the unit rod 230 at the ending end. The length dimension of the second rope 800 or the second rope 800 can be elastically stretched to satisfy the requirement of folding all the unit rods 230 into a mutually parallel state. It can be understood that the tail end of one segment of the unit rod 230 is connected to the head end of another segment of the unit rod 230 until all the unit rods 230 are arranged into the rotating shaft rod 200. When the rotating shaft rod 200 needs to be disassembled into multiple segments of unit rods 230 to reduce the storage volume, two adjacent segments of the unit rods 230 are separated along the length direction of the unit rod 230, and then are folded to be mutually parallel. The part of the second rope 800 extending out of two adjacent segments of the unit rods 230 is bent, and the extending path of the second rope 800 is also serpentinely bent. The setting of the second rope 800 can prevent the problem of loss of the unit rods 230 when the rotating shaft rod 200 is disassembled into multiple segments of unit rods 230. When all the unit rods 230 are folded into a mutually parallel state, the second rope 800 is in an elastically stretched state, or the length of the second rope 800 is long enough not to affect the disassembly of the rotating shaft rod 200 into multiple segments of unit rods 230 and the assembly of multiple segments of unit rods 230 into the rotating shaft rod 200. The setting of the second rope 800 is beneficial to both the quick folding and storage of the rotating shaft rod 200 and the quick unfolding and use of the rotating shaft rod 200.

[0046] It should be noted that all the unit rods 230 are located inside the corresponding unit tubes 110. When two adjacent unit tubes 110 are disassembled, the corresponding two segments of the unit rods 230 are also disassembled, and each unit tube 110 after disassembly contains one segment of the unit rod 230. When two adjacent unit tubes 110 are spliced, two adjacent segments of the unit rods 230 are also spliced synchronously, which greatly reduces the volume of the retractable spreading device after folding and storage, and also greatly improves the assembly efficiency of the retractable spreading device.

[0047] See Figure 2 、 Figure 5 and Figure 7 , in some embodiments of the present utility model, two adjacent segments of the unit rods 230 are detachably connected by a first connecting block 240. One end of the first connecting block 240 is fixed to the end of one segment of the unit rod 230, and the other end of the first connecting block 240 is available for detachably inserting another segment of the unit rod 230. A threading channel located inside the unit rod 230 is penetrated through the interior of the first connecting block 240, and the second rope 800 passes through the threading channel.

[0048] Among them, the unit rod 230 and the rotating shaft rod 200 are both cylindrical to facilitate uniform thickness when the spreading 10 is wound around the outer peripheral wall of the rotating shaft rod 200. The adjacent two sections of the unit rod 230 are in plug-in fit with each other by using the first connecting block 240. Specifically, plug-in ribs are provided at both ends of the first connecting block 240, and plug-in grooves matching the plug-in ribs are provided at both ends of the unit rod 230. Adhesive glue is coated between the plug-in rib at one end of the first connecting block 240 and the plug-in groove of one section of the unit rod 230. After the plug-in rib at one end of the first connecting block 240 is inserted into the plug-in groove of one section of the unit rod 230, they can be fixedly connected into an integral structure. The plug-in rib at the other end of the first connecting block 240 is then detachably inserted into the plug-in groove of another section of the unit rod 230, so that the detachable installation between the adjacent two sections of the unit rod 230 can be realized. A limiting rod portion 11 on the spreading 10 passes through the sliding installation groove 210 located at the center of each section of the unit rod 230, and the second rope 800 passes through each section of the unit rod 230 and each first connecting block 240 from the side of the sliding installation groove 210. Among them, the second rope 800 is preferably an elastic cord, and the elastic cord can assist in pulling all the unit rods 230 arranged in a straight line together.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0050] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A winding and unfolding device, characterized in that, Comprising: A first long rod (100), within which there is a first channel extending along its length direction. A rotating shaft rod (200) extending along the length direction of the first long rod (100) is rotatably arranged within the first channel. An annular space (300) capable of accommodating at least a part of the spread (10) is defined between the rotating shaft rod (200) and the inner peripheral wall of the first channel. An inlet / outlet (101) extending along the length direction of the first long rod (100) and communicating with the annular space (300) is provided on the side part of the first long rod (100). The rotating shaft rod (200) is used to connect one side edge of the spread (10) so that the spread (10) is wound in the annular space (300) or extends out from the inlet / outlet (101).

2. A winding type spread device according to claim 1, characterized in that: A rotation positioning assembly (400) capable of locking and unlocking the angular position of the rotating shaft rod (200) is provided between the first long rod (100) and the rotating shaft rod (200).

3. A winding type spread device according to claim 2, characterized in that: The rotation positioning assembly (400) includes a ratchet wheel (410) fixedly arranged at at least one end of the rotating shaft rod (200), a pawl (420) arranged on the first long rod (100) and adapted to the ratchet wheel (410), and an elastic member (430) for driving the pawl (420) to engage with the ratchet wheel (410).

4. A winding type spread device according to claim 1, characterized in that: A sliding installation groove (210) is axially penetrated through the rotating shaft rod (200). A communication port (220) connecting the sliding installation groove (210) with the annular space (300) is provided on the side wall of the rotating shaft rod (200). Limited position rod parts (11) are connected to opposite side edges of the spread (10). One of the limited position rod parts (11) penetrates through the sliding installation groove (210). The width dimension of the communication port (220) is smaller than the width dimension of the sliding installation groove (210) to prevent the corresponding limited position rod part (11) from disengaging from the sliding installation groove (210).

5. A winding type spread device according to claim 4, characterized in that: The first long rod (100) is detachably connected by multiple unit tubes (110). The rotating shaft rod (200) is detachably connected by multiple unit rods (230). The limited position rod parts (11) are composed of steel cables. A cloth sleeve (12) for the steel cables to movably penetrate through is provided on the side edge of the spread (10). The steel cables can be drawn out along the sliding installation groove (210). A unit channel for the unit rod (230) to movably penetrate through is provided inside each unit tube (110). A part of the annular space (300) is defined between the unit channel and the corresponding unit rod (230).

6. A winding type spread device according to claim 5, characterized in that: A plurality of unit tubes (110) are arranged in sequence. A first movable part (500) is provided in the unit tube (110) at the beginning, and an elastic assembly (600) is provided in the unit tube (110) at the end. A first rope (700) is connected between the elastic assembly (600) and the first movable part (500) and passes through the inside of all the unit tubes (110) in sequence. The elastic assembly (600) tightens the first rope (700) so that all the unit tubes (110) are abutted against each other in sequence and arranged in a straight line. The elastic assembly (600) relaxes the first rope (700) so that all the unit tubes (110) can be folded to form a state parallel to each other.

7. A roll-up spreading device according to claim 6, characterized in that: The tensioning assembly (600) includes a second movable part (610) movably arranged in the unit tube (110) at the end, and one end of the first rope (700) away from the first movable part (500) is connected to the second movable part (610). The end of the unit tube (110) located at the end is rotatably provided with an adjusting screw (620), and the head of the adjusting screw (620) is exposed at the end of the unit tube (110). The second movable part (610) is fixed with a nut part (630) that is compatible with the adjusting screw (620).

8. The roll-up spreading device according to claim 6, characterized in that: Two adjacent sections of the unit tube (110) are detachably connected via a second connecting block (120); one end of the second connecting block (120) is fixed to the end of one section of the unit tube (110); the other end of the second connecting block (120) can be detachably plugged into the other section of the unit tube (110); a threading hole located inside the unit tube (110) is provided through the interior of the second connecting block (120); the first rope (700) passes through the threading hole; the second connecting block (120) is provided with a clearance hole for the rotating shaft rod (200) to movably pass through; the ends of the unit tube (110) at the starting end and the end end are both provided with a third connecting block (130); the third connecting block (130) is provided with an axial hole for the end of the rotating shaft rod (200) to be rotatably provided.

9. The roll-up spreading device according to claim 5, characterized in that: A plurality of sections of the unit rods (230) are arranged in sequence, and a second rope (800) is provided between the unit rod (230) at the starting end and the unit rod (230) at the end, and passes through the interior of all the unit rods (230) in sequence. The length of the second rope (800) or the second rope (800) can be elastically stretched to meet the requirements of folding all the unit rods (230) to form a state parallel to each other.

10. A roll-up spreading device according to claim 9, characterized in that: Two adjacent unit rods (230) are detachably connected by a first connecting block (240). One end of the first connecting block (240) is fixed to the end of one of the unit rods (230), and the other end of the first connecting block (240) is provided for detachably plugging in the other unit rod (230). A wire threading channel located inside the unit rod (230) runs through the interior of the first connecting block (240), and the second rope (800) passes through the wire threading channel.

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