Curtain rope winding device

Abstract

The embodiment of the utility model provides a curtain rope winding device which comprises a base and a rope winding drum assembled on the base, and an axial through inner hole for a transmission shaft of a curtain driving device to penetrate through is formed in the axis of the rope winding drum. A connecting structure for relatively fixing the rope winding barrel and the transmission shaft in the circumferential direction and axially and relatively movably connecting the rope winding barrel and the transmission shaft is arranged at the position, close to a hole opening in one end, in the inner hole; the curtain rope winding device further comprises an external threaded pipe which is fixed to the base, is coaxial with the rope winding barrel and allows the transmission shaft to penetrate through the axis hole; an internal thread is further arranged at the orifice of the other end, away from the connecting structure, in the inner hole, one end of the external thread pipe is inserted into the inner hole from the end, provided with the internal thread, of the inner hole and is in threaded connection with the internal thread correspondingly, and the rope winding barrel is in threaded connection with the external thread pipe all the time when rotating along with the transmission shaft and rotates spirally relative to the external thread pipe to move in the axial direction. According to the embodiment of the utility model, the overall axial size of the device can be effectively reduced, and miniaturization of the device is facilitated.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of curtain accessories, and in particular to a curtain rope winding device. Background Art

[0002] The cord winding device of the curtain is usually installed in the upper beam of the curtain, and is used for correspondingly retracting and releasing the load-bearing cord whose other end is connected to the curtain body under the drive of the corresponding driving device to correspondingly realize the lifting and lowering of the curtain body.

[0003] An existing rope winding device includes a base and a rope winding drum pivotally mounted on the base, the rope winding drum includes a rope winding segment for winding a load-bearing rope thereon and a screw segment coaxially connected to one end of the rope winding segment, a nut screwed to the screw segment is fixedly arranged on the base, a transmission shaft of a driving device passes through the axis of the rope winding drum and is relatively fixed to the rope winding drum in the circumferential direction, thereby driving the rope winding drum to rotate to realize the retraction and release of the load-bearing rope, and when the rope winding drum rotates, the screw segment rotates relative to the nut and drives the rope winding drum to move axially relative to the base, so that the load-bearing rope can be retracted and released one by one relative to the rope winding segment at a fixed position, thereby preventing the load-bearing rope from being entangled with each other or loosening.

[0004] However, during the specific implementation process, the inventors found that since the rope winding section and the screw section of the rope winding drum are coaxially connected as one body, and when the rope winding drum as a whole moves axially toward the end away from the rope winding section, the screw section will extend from the corresponding end of the base. Therefore, it is also necessary to reserve sufficient space inside or outside the corresponding end of the base to avoid the screw section, resulting in the installation size of the rope winding device as a whole in the axial direction (including the size of the device itself and the size of the avoidance space that needs to be reserved) being relatively large, which is not conducive to the miniaturization of the rope winding device. Moreover, in order to reduce the material used for the base, the screw section is usually extended to the outside of the base. At this time, the screw section is also easily disturbed by other components outside the base or foreign objects that accidentally enter the upper beam of the curtain, causing poor operation, thereby affecting the normal lifting and lowering of the curtain body. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a curtain rope winding device which can effectively reduce the axial installation size of the device.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides the following technical solutions: a curtain rope winding device, comprising a base with an end wall at at least one end and a rope winding drum assembled on the base, an inner hole axially penetrating and passing through for a transmission shaft of a curtain driving device to pass through is provided at the axis center of the rope winding drum, a connecting structure is provided at an opening at one end of the inner hole to relatively fix the rope winding drum and the transmission shaft in the circumferential direction and relatively movably connect the rope winding drum and the transmission shaft in the axial direction, the curtain rope winding device also includes an externally threaded tube fixed on the base and coaxially arranged with the rope winding drum and passing the transmission shaft through the axis center hole, an internal thread is also provided at the opening at the other end away from the connecting structure, one end of the externally threaded tube is inserted into the inner hole from the end of the inner hole provided with the internal thread and is screwed correspondingly to the internal thread, and the rope winding drum rotates spirally relative to the externally threaded tube and moves axially when rotating with the transmission shaft.

[0007] Furthermore, a nut with the internal thread is fixedly assembled inside the inner hole, and the external threaded tube is threadedly connected to the nut accordingly.

[0008] Furthermore, a positioning spring sheet extending axially is formed on the outer wall of the nut, and an outwardly protruding positioning bump is provided at the end of the positioning spring sheet. A positioning hole is also provided on the corresponding end hole wall of the inner hole. The nut is inserted into the inner hole and positioned by correspondingly snapping into the positioning hole with the positioning bump.

[0009] Furthermore, a guide groove extending axially is formed on the outer wall of the nut, and a guide key extending axially from the hole mouth is protruding on the corresponding end hole wall of the inner hole. When the nut is inserted into the inner hole, the guide key is correspondingly inserted into the guide groove.

[0010] Furthermore, a guide key extending axially is formed on the outer side wall of the nut, and a guide groove extending axially from the hole mouth is formed on the corresponding end hole wall of the inner hole. When the nut is inserted into the inner hole, the guide key is correspondingly inserted into the guide groove.

[0011] Further, the connecting structure is a convex key protruding from the wall of the inner hole and correspondingly matching with the axial groove formed on the outer wall of the transmission shaft; or, the connecting structure is a keyway formed by a corresponding depression in the wall of the inner hole and correspondingly matching with the key strip protruding and extending axially on the outer wall of the transmission shaft.

[0012] Furthermore, the internal thread is directly integrally formed on the wall of the inner hole.

[0013] Furthermore, end walls are provided at opposite ends of the base, and the axial movable stroke of the rope winding drum is between the two end walls.

[0014] Furthermore, a positioning plug is radially protruded on one end of the external threaded tube away from the rope winding drum, and an anti-slip hook is formed at the edge of the positioning plug. A slot is provided on the end wall of the corresponding end of the base, and a hook hole is provided on the slot wall corresponding to the anti-slip hook. After the positioning plug is inserted into the slot, it is hooked into the hook hole with the anti-slip hook.

[0015] Furthermore, the curtain rope winding device also includes a top cover arranged on the top of the base, first fasteners are extended from both ends of the top cover toward the base and abutment blocks are provided corresponding to the slots, second fasteners corresponding to the first fasteners are provided on the two end walls of the base, and the top cover is fixed relative to the base by hooking the first fasteners and the second fasteners and the positioning plug is fixed by the abutment blocks.

[0016] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model provides an internal thread in the inner hole of the rope drum, and provides an external threaded tube on the base to be inserted into the inner hole of the rope drum and correspondingly screwed. When the rope drum rotates with the transmission shaft to retract and release the load-bearing rope, it will synchronously rotate and move axially relative to the external threaded tube, thereby realizing the orderly winding and retraction of the load-bearing rope on the rope drum, and the rope drum and the external threaded tube are always screwed, which can ensure that the rope drum will not be separated from the external threaded tube, which is equivalent to the rope drum and the external threaded tube forming a two-section telescopic sleeve structure, the maximum axial dimension of which will still be no greater than the sum of the lengths of the rope drum and the external threaded tube, and can effectively reduce the overall axial installation dimension of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an optional embodiment of the curtain rope winding device of the utility model after the top cover is disassembled.

[0018] Figure 2 The present invention is a three-dimensional structural schematic diagram of an optional embodiment of the curtain rope winding device of the present invention in a disassembled state.

[0019] Figure 3 This is a longitudinal sectional view of an optional embodiment of the curtain rope winding device of the utility model through the central axis of the transmission shaft.

[0020] Figure 4 It is a longitudinal sectional view of an optional embodiment of the curtain cord winding device of the utility model passing through the central axis of the positioning hole.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of another optional embodiment of the curtain rope winding device of the utility model after the rope winding drum and the nut are assembled. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0023] like Figure 1-Figure 5 As shown, an optional embodiment of the utility model provides a curtain rope winding device 1, comprising a base 10 with an end wall at at least one end and a rope drum 12 assembled on the base 10, the rope drum 12 is provided with an inner hole 121 axially penetrating and for the transmission shaft 2 of the curtain driving device to pass through at the axis center, and a connecting structure 123 is provided at one end of the inner hole 121 to relatively fix the rope drum 12 and the transmission shaft 2 in the circumferential direction and relatively movably connect the axial direction, and the curtain rope winding device 1 also includes a base 10 provided with an end wall at at least one end of the base 10 and a rope drum 12 assembled on the base 10, and an inner hole 121 is provided with an inner hole 121 to relatively fix the rope drum 12 and the transmission shaft 2 in the circumferential direction and relatively movably connect the rope drum 12 and the transmission shaft 2 in the axial direction, and a connecting structure 123 is provided to relatively connect ... An externally threaded tube 14 is disposed on the base 10 coaxially with the rope drum 12 and allows the transmission shaft 2 to pass through the axial center hole 141. An internal thread 125 is also disposed in the inner hole 121 at the other end opening away from the connecting structure 123. One end of the externally threaded tube 14 is inserted into the inner hole 121 from the end of the inner hole 121 provided with the internal thread 125 and is threadedly connected to the internal thread 125. When the rope drum 12 rotates with the transmission shaft 2, it spirally rotates relative to the externally threaded tube 14 and moves axially.

[0024] In the embodiment of the utility model, an internal thread 125 is provided in the inner hole 121 of the rope drum 12, and an external threaded tube 14 is provided on the base 10 to be inserted into the inner hole 121 of the rope drum 12 and correspondingly screwed. When the rope drum 12 rotates with the transmission shaft 2 to retract and release the load-bearing rope 3, it will synchronously rotate and move axially relative to the external threaded tube 14, so that the load-bearing rope 3 can be wound and retracted at a fixed point on the rope drum 12 in an orderly manner. Moreover, the rope drum 12 and the external threaded tube 14 are always screwed, which can ensure that the rope drum 12 will not be separated from the external threaded tube 14, which is equivalent to the rope drum 12 and the external threaded tube 14 forming a two-section telescopic sleeve structure, and its maximum axial dimension will still be no greater than the sum of the lengths of the rope drum 12 and the external threaded tube 14, which can effectively reduce the overall axial installation dimension of the curtain rope winding device 1.

[0025] In another optional embodiment of the present invention, Figure 2-Figure 3As shown, a nut 16 having the internal thread 125 is fixedly assembled inside the inner hole 121, and the external threaded tube 14 is correspondingly screwed to the nut 16. In this embodiment, the nut 16 is fixedly assembled in the inner hole 121 of the rope drum 12, and the internal thread 125 correspondingly screwed to the external threaded tube 14 is formed inside the nut 16, which makes it more convenient to process and form the internal thread 125, and at the same time, corresponding standard parts of the nut 16 can be used to reduce production costs.

[0026] In another optional embodiment of the present invention, Figure 2 and Figure 4 As shown, a positioning spring piece 161 extending in the axial direction is formed on the outer wall of the nut 16, and a positioning convex point 163 is also provided at the end of the positioning spring piece 161. A positioning hole 127 is also provided on the corresponding end hole wall of the inner hole 121. The nut 16 is inserted into the inner hole 121 and is positioned by the positioning convex point 163 correspondingly snapping into the positioning hole 127. In this embodiment, a positioning spring piece 161 extending in the axial direction and having a positioning convex point 163 at the end is formed on the outer wall of the nut 16. When the nut 16 is installed, the positioning spring piece 161 is elastically compressed in the radial direction and moves to the inside of the inner hole 121 until the positioning convex point 163 snaps into the positioning hole 127 on the hole wall of the inner hole 121 of the rope drum 12, and the connection is stable. In the specific implementation process, the positioning spring piece 161 can be symmetrically arranged, which has a better fixing effect on the nut 16.

[0027] In another optional embodiment of the present invention, Figure 2-Figure 3 As shown, the outer wall of the nut 16 is also formed with an axially extending guide groove 11, and the corresponding end hole wall of the inner hole 121 is also protrudingly provided with a guide key 13 extending axially from the hole opening. When the nut 16 is inserted into the inner hole 121, the guide key 13 is correspondingly inserted into the guide groove 11. In this embodiment, the nut 16 is provided with an axially extending guide groove 11 on the outer wall of the nut 16, and the corresponding end hole wall of the inner hole 121 is also protrudingly provided with a guide key 13 extending axially from the hole opening. The nut 16 is positioned at the installation position of the nut 16 with the guide groove 11 facing the guide key 13, so as to facilitate the assembly operation of the nut 16.

[0028] In another optional embodiment of the present invention, Figure 5As shown, the outer side wall of the nut 16 is also convexly formed with a guide key 13 extending in the axial direction, and the corresponding end hole wall of the inner hole 121 is also provided with a guide groove 11 extending in the axial direction from the hole opening. When the nut 16 is inserted into the inner hole 121, the guide key 13 is correspondingly inserted into the guide groove 11. In this embodiment, the guide key 13 extending in the axial direction is convexly formed on the outer side wall of the nut 16, and the corresponding end hole wall of the inner hole 121 is also provided with a guide groove 11 extending in the axial direction from the hole opening. The nut 16 is positioned at the installation position of the nut 16 with the guide key 13 facing the guide groove 11, and then the nut 16 is pushed until the end of the guide key 13 abuts against the bottom wall of the guide groove 11, so as to facilitate the positioning and installation of the nut 16.

[0029] In another optional embodiment of the present invention, Figure 3-Figure 4 As shown, the connection structure 123 is a convex key 123 protruding from the hole wall of the inner hole 121 and correspondingly matched with the axial groove 21 formed on the outer wall of the transmission shaft 2; or the connection structure 123 is a keyway formed by a corresponding depression from the hole wall of the inner hole 121 and correspondingly matched with a key bar protruding and axially extending on the outer wall of the transmission shaft 2. In this embodiment, the groove 21 and the convex key 123 or the key bar and the keyway are used to achieve the circumferential relative fixation of the rope drum 12 and the transmission shaft 2, so that the rope drum 12 and the transmission shaft 2 inserted therein will not slide relative to each other in the circumferential direction, ensuring the effective transmission of the transmission shaft 2.

[0030] In another optional embodiment of the present invention, the internal thread 125 is directly integrally formed on the wall of the inner hole 121. In this embodiment, the number of accessories of the curtain cord winding device 1 is reduced by integrally forming the internal thread 125 on the wall of the inner hole 121, thereby reducing the difficulty of assembly.

[0031] In another optional embodiment of the present invention, Figure 2-Figure 3 As shown, the base 10 is provided with end walls at both opposite ends, and the axial movable stroke of the rope drum 12 is between the two end walls. In this embodiment, corresponding end walls are provided at both ends of the base 10, wherein one end wall is used to limit the initial position of the rope drum 12 when the carrying rope 3 is fully lowered, and the opposite end is used to assemble and connect the external threaded tube 14. The rope drum 12 moves from the initial position to the side of the external threaded tube 14 and winds the carrying rope 3 circle by circle until the carrying rope 3 is completely retracted. Therefore, during the process of retracting and releasing the curtain body, the rope drum 12 is always completely stored in the base 10, realizing effective shielding of the rope drum 12, avoiding interference of other components outside the base 10 with the operation of the rope drum 12, and ensuring smooth retraction and release of the carrying rope 3.

[0032] In another optional embodiment of the present invention, Figure 2-Figure 3 As shown, a positioning insert 143 is radially protruded on one end of the external threaded tube 14 away from the rope winding drum 12, and an anti-slip hook 145 is also formed at the edge of the positioning insert 143. A slot 101 is provided on the end wall of the corresponding end of the base 10, and a hook hole 103 is formed on the groove wall of the slot 101 corresponding to the anti-slip hook 145. After the positioning insert 143 is inserted into the slot 101, it is hooked in the hook hole 103 by the anti-slip hook. In this embodiment, a positioning plug 143 is formed on the end of the externally threaded tube 14 away from the rope drum 12 in a radially outward protrusion. The externally threaded tube 14 is inserted into the slot 101 that should be set on the end wall of the corresponding end of the base 10 with the positioning plug 143, thereby realizing a fixed connection between the externally threaded tube 14 and the base 10. The structure is simple and the assembly is convenient. In addition, an anti-drop hook 145 is formed at the edge of the positioning plug 143, which is used to hook into the hook hole 103 after passing through the hook hole 103 opened on the groove wall on the corresponding side of the slot 101, thereby improving the connection stability between the externally threaded tube 14 and the base 10.

[0033] In another optional embodiment of the present invention, Figure 1-Figure 2 As shown, the curtain cord winding device 1 also includes a top cover 18 covered on the top of the base 10, and first fasteners 181 extend from both ends of the top cover 18 toward the base 10 and abutment blocks 183 are provided corresponding to the slots 101, and second fasteners 10 corresponding to the first fasteners 181 are provided on the two end walls of the base 10, and the top cover 18 is relatively fixed to the base 10 by hooking the first fasteners 181 and the second fasteners 10, and the positioning plug 143 is pressed and fixed by the abutment blocks 183. In this embodiment, a top cover 18 is provided on the top of the base 10, which can cover the rope drum 12 and the external threaded tube 14 to prevent foreign objects from falling into the base 10 and interfering with the retraction and release of the load-bearing rope 3; the top cover 18 is relatively fixed to the base 10 by the first fasteners 181 at both ends correspondingly engaging with the second fasteners 105 on the base 10, which has a simple structure and is easy to assemble; the top cover 18 is provided with abutment blocks 183 corresponding to the slots 101, and when the top cover 18 is fastened and fixed, the abutment blocks 183 are pressed against the top of the positioning plug 143 to effectively fix the positioning plug 143. In the specific implementation process, one of the first fastener 181 and the second fastener 105 can be a structure such as a fastening protrusion or a fastening barb, and the other can be a structure such as a fastening hole or a fastening groove.

[0034] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A curtain rope winding device, comprising a base with an end wall at at least one end and a rope winding drum assembled on the base, wherein an inner hole is provided at the axis of the rope winding drum and is axially penetrated and passed through by a transmission shaft of a curtain driving device, and a connecting structure is provided at one end of the inner hole to relatively fix the rope winding drum and the transmission shaft in the circumferential direction and relatively movably connect the rope winding drum and the transmission shaft in the axial direction, characterized in that: The curtain rope winding device also includes an externally threaded tube with one end fixed to the end wall of the corresponding end of the base and coaxially arranged with the rope winding drum and for the transmission shaft to pass through from the axial center hole. The inner hole is also provided with an internal thread at the other end opening away from the connecting structure. One end of the externally threaded tube is inserted into the inner hole from the end of the inner hole provided with the internal thread and is screwed correspondingly to the internal thread. When the rope winding drum rotates with the transmission shaft, it always remains screwed with the externally threaded tube and moves axially relative to the spiral rotation of the externally threaded tube.

2. The curtain cord winding device according to claim 1, characterized in that: A nut with the internal thread is fixedly assembled inside the inner hole, and the external threaded pipe is threadedly connected with the nut accordingly.

3. The curtain cord winding device according to claim 2, characterized in that: A positioning spring sheet extending axially is formed on the outer wall of the nut, and an outwardly protruding positioning bump is provided at the end of the positioning spring sheet. A positioning hole is also provided on the corresponding end hole wall of the inner hole. The nut is inserted into the inner hole and positioned by being snapped into the positioning hole corresponding to the positioning bump.

4. The curtain cord winding device according to claim 3, characterized in that: A guide groove extending axially is also formed on the outer wall of the nut, and a guide key extending axially from the hole mouth is protruding on the corresponding end hole wall of the inner hole. When the nut is inserted into the inner hole, the guide key is correspondingly inserted into the guide groove.

5. The curtain cord winding device according to claim 3, characterized in that: The outer side wall of the nut is also convexly formed with a guide key extending along the axial direction, and the corresponding end hole wall of the inner hole is also provided with a guide groove extending axially from the hole mouth. When the nut is inserted into the inner hole, the guide key is correspondingly inserted into the guide groove.

6. The curtain cord winding device according to claim 1, characterized in that: The connecting structure is a convex key protruding from the inner hole wall and correspondingly matching with the axial groove formed on the outer wall of the transmission shaft; or, the connecting structure is a keyway formed by a corresponding depression in the inner hole wall and correspondingly matching with a key strip protruding outward and extending axially on the outer wall of the transmission shaft.

7. The curtain cord winding device according to claim 1, characterized in that: The internal thread is directly integrally formed on the wall of the inner hole.

8. The curtain cord winding device according to claim 1, characterized in that: The base is provided with end walls at opposite ends, and the axial movable stroke of the rope drum is between the two end walls.

9. The curtain cord winding device according to claim 1 or 8, characterized in that: A positioning plug is formed radially outwardly at one end of the external threaded tube away from the rope winding drum, and an anti-slip hook is formed at the edge of the positioning plug. A slot is provided on the end wall of the corresponding end of the base, and a hook hole is formed on the slot wall corresponding to the anti-slip hook. After the positioning plug is inserted into the slot, it is hooked into the hook hole with the anti-slip hook.

10. The curtain cord winding device according to claim 9, characterized in that: The curtain cord winding device also includes a top cover arranged on the top of the base, first fasteners extending from both ends of the top cover toward the base and abutment blocks corresponding to the slots, second fasteners corresponding to the first fasteners are arranged on the two end walls of the base, the top cover is fixed relative to the base by hooking the first fasteners and the second fasteners, and the positioning plug is pressed and fixed by the abutment blocks.

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