Roll net door and window with adjustable torsion
By introducing a shaft tube and a one-way limiting component into the roller mesh door and window design, the problem of easy fatigue failure of spring torque is solved, the spring torque can be adjusted and the service life can be extended, and the practicality and stability of the product are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-31
AI Technical Summary
The spring rewind mechanism of existing roller shutter doors and windows is prone to fatigue failure after long-term use, which leads to the failure of the screen rewind function. Moreover, replacing the spring is cumbersome and costly.
A spring rewinding mechanism including a shaft tube, a first chuck, and a second chuck was designed. The spring torque is adjustable through a one-way limiting component and a ratchet structure. The adjustment range is increased by using a pawl and a locking groove, which simplifies the adjustment process of the spring torque.
This technology enables adjustable spring torque, extends spring lifespan, eliminates the need for frequent spring replacements, and enhances product practicality and stability.
Smart Images
Figure CN224064262U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a net window door and window technology field more specifically, it relates to a torsion adjustable net window door. BACKGROUND
[0002] The screen window and screen door are as common mosquito-proof ventilation device, and its core function relies on built-in spring retraction mechanism to realize the automatic winding of the screen. In the traditional design, the screen is driven by the spring torsion to rotate the reel, thereby completing the reset action after unfolding. Such structure is usually composed of a reel, a spring assembly, a guide rail and a limiting part, the spring is pre-tightened and installed in the reel, and the accumulated elastic potential energy of the spring provides the power for the screen winding.
[0003] However, the winding force (torsion) of the spring in the prior art is fixed after assembly, and the spring is prone to fatigue failure in a single pre-tightened state for a long time, the spring performance attenuation cannot be compensated by adjustment, the screen winding function gradually fails, and the screen cannot be wound in place; and replacing the new spring also has the problems of complicated operation and additional cost. SUMMARY
[0004] To solve the above problems, the utility model provides the following technical scheme:
[0005] A torsion-adjustable net window door, comprising a frame, a net and a spring retraction mechanism, the frame is rotatably connected with a shaft pipe, the frame is slidably connected with a fixed plate, one end of the net is connected to the fixed plate, the other end of the net is wound on the shaft pipe, the spring retraction mechanism comprises a spring arranged along the length direction of the shaft pipe, the two ends of the spring are respectively connected with a first chuck and a second chuck, the first chuck penetrates into the shaft pipe and is limited in the circumferential direction with the shaft pipe, the second chuck is rotatably connected to the frame and can rotate relative to the shaft pipe, a one-way limiting assembly for limiting the rotation direction of the second chuck is arranged between the second chuck and the frame.
[0006] The utility model is further provided as follows: the spring is coaxially arranged with the shaft pipe, the first chuck slides relative to the shaft pipe in the axial direction of the shaft pipe, and the second chuck is limited on the frame in the axial direction of the shaft pipe.
[0007] The utility model is further provided as follows: the one-way limiting assembly comprises a ratchet wheel arranged at the end of the second chuck away from the shaft pipe, a sink groove is formed in the side wall of the frame, the ratchet wheel rotates in the sink groove, a clamping groove matched with the ratchet wheel is formed in the inner circumferential wall of the sink groove, when the net is pulled downward, the second chuck is limited by the one-way limiting assembly and cannot rotate.
[0008] The utility model further sets up: the perimeter of ratchet is provided with a plurality of pawls, a plurality of pawl equal interval arrangement along the circumference of ratchet, pawl and the clamping groove clamping cooperation.
[0009] The utility model further sets up: coaxial operating hole is set up on the ratchet, the operating hole is polygonal.
[0010] The utility model further sets up: the inside of axle pipe is protruding and clamps the strip, clamps the strip along the axial extension of axle pipe setting, and a plurality of clamps the strip along the circumference of axle pipe arrangement, first chuck and clamps the strip and engages and realizes the circumference limit.
[0011] The utility model further sets up: the both ends of axle pipe are provided with the shaft sleeve respectively, the shaft sleeve is set up on second chuck, the axle pipe is set up on the shaft sleeve, the perimeter wall of shaft sleeve is protruding and has the positioning block, the positioning block and clamps the strip and engages and realizes the circumference limit between shaft sleeve and axle pipe.
[0012] The utility model further sets up: the frame includes upper frame and lower frame, the left and right ends of upper frame and lower frame are connected through the vertical frame respectively.
[0013] The utility model further sets up: the vertical frame is set up and goes in the groove, goes in the groove and runs through the vertical frame along the length direction of vertical frame, and upper frame and lower frame are inserted into the groove respectively and are clamped through friction.
[0014] Compared with the prior art, the utility model has at least the following advantages:
[0015] 1, when the user pulls the net down, first chuck follows rotation, second chuck keeps still, makes spring be twisted, needs to collect the net when and can automatically collect the net of spring rebounding torsion, when the spring torsion declines after long time, can pass through rotating second chuck, first chuck keeps still, twists spring and makes its number of turns change, enhances the torsion of spring, realizes the adjustment of spring torsion through simple structure, need not to replace spring when the elasticity declines, prolongs the service life of spring.
[0016] 2, set up ratchet on second chuck, make second chuck realize one-way rotation, and through setting up a plurality of pawls, increase the gear of adjustment, make the torsion of spring adjustment more refined.
[0017] 3, go in the groove on the vertical frame, and the upper and lower frames are inserted into the groove, and the frame is simple to install, so that the height of the frame can be adjusted and changed, and the practicability of the product is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the whole schematic diagram of the embodiment;
[0019] Figure 2 is a first perspective view of the spring retraction mechanism;
[0020] Figure 3 is a second perspective view of the spring retraction mechanism;
[0021] Figure 4 is a schematic view of the second collet portion;
[0022] Figure 5 is an exploded schematic view of the bezel;
[0023] Figure 6 is a schematic view showing the slot.
[0024] BRIEF DESCRIPTION OF DRAWINGS
[0025] 1. upper frame; 2. lower frame; 3. vertical frame; 4. shaft tube; 5. winding net; 6. fixed plate; 7. spring; 8. first collet; 9. second collet; 10. ratchet; 11. clamping groove; 12. operating hole; 13. clamping strip; 14. shaft sleeve; 15. positioning block; 16. slot; 17. fixed assembly; 18. elastic arm; 19. step surface. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "join" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] A torsion-adjustable winding net door and window, such as Figure 1As shown, including the frame, the net 5 and spring roll mechanism, the frame is rotatably connected with the shaft tube 4, the frame is slidably connected with the fixed plate 6, one end of the net 5 is connected to the fixed plate 6, the other end is wound on the shaft tube 4. The net 5 can be a gauze or cloth and other flexible materials. When pulling down the fixed plate 6, the net 5 is pulled down, driving the shaft tube 4 to rotate. The fixed plate 6 and the bottom of the frame have a fixed component 17, which realizes the fixation after the net 5 is pulled out, and the fixed component 17 is not the improvement point of the present patent, so it is not described again. When the user needs to retract the net 5, the fixed component 17 is released, and the spring roll mechanism automatically retracts the net 5.
[0029] As shown in the figure, Figures 1 to 4 The spring roll mechanism includes a spring 7 arranged along the length direction of the shaft tube 4, the two ends of the spring 7 are respectively connected with the first chuck 8 and the second chuck 9, and the first chuck 8 and the second chuck 9 are partially inserted into the spring 7 to improve the connection stability. The first chuck 8 is inserted into the shaft tube 4 and is limited in the circumferential direction with the shaft tube 4, that is, the first chuck 8 and the shaft tube 4 cannot rotate relative to each other, and the second chuck 9 is rotatably connected to the frame and can rotate relative to the shaft tube 4. A one-way limiting component is arranged between the second chuck 9 and the frame for limiting the rotation direction of the second chuck 9, so that the second chuck 9 can only rotate in one direction through the one-way limiting component.
[0030] The spring 7 is coaxially arranged with the shaft tube 4, and the first chuck 8 slides relative to the shaft tube 4 in the axial direction of the shaft tube 4. The second chuck 9 is limited on the frame in the axial direction of the shaft tube 4, that is, the second chuck 9 can only rotate in place and cannot move left and right.
[0031] The one-way limiting component includes a ratchet wheel 10 arranged at the end of the second chuck 9 away from the shaft tube 4, a sink groove is formed in the side wall of the frame, the ratchet wheel 10 rotates in the sink groove, and the second chuck 9 passes through the frame from the through hole in the middle of the sink groove. The through hole is composed of a circumferential elastic arm 18, the elastic arm 18 clamps the second chuck 9 to realize interference fit, and the user needs to use a larger external force to realize the rotation of the second chuck 9. The second chuck 9 also has a stepped surface 19 on the peripheral wall, which clamps the through hole in the middle through the stepped surface 19 and the ratchet wheel 10, and realizes the axial limitation of the second chuck 9.
[0032] A clamping groove 11 is formed in the inner circumferential wall of the sink groove for clamping the ratchet wheel 10, so that the second chuck 9 can only rotate in one direction through the cooperation between the ratchet wheel 10 and the clamping groove 11. In this embodiment, when the net 5 is pulled down, the shaft tube 4 and the first chuck 8 rotate, while the second chuck 9 is limited by the one-way limiting component and cannot rotate, that is, when the net 5 is pulled down, the rotation direction of the shaft tube 4 is opposite to the rotatable direction of the ratchet wheel 10, avoiding the second chuck 9 from rotating due to friction.
[0033] The ratchet wheel 10 is provided with a plurality of pawls which are equidistantly arranged along the circumference of the ratchet wheel 10, and the pawls are in clamping cooperation with the clamping grooves 11; in the embodiment, a plurality of clamping grooves 11 corresponding to the number of the pawls are formed in the inner circumferential wall of the sink groove. When there is only one pawl on the ratchet wheel 10, the second chuck 9 can only be adjusted by 360° each time; when there are two pawls, the second chuck 9 can be adjusted by 180° each time; and in the same way, by arranging a plurality of pawls, the adjustment range is increased, the torsion adjustment of the spring 7 is more refined, and the user's demand is met.
[0034] The second chuck 9 is coaxially arranged in the middle of the ratchet wheel 10 and is provided with an operation hole 12, the operation hole 12 is polygonal, a tool such as an internal hexagonal wrench can be inserted into the operation hole 12, and the user can conveniently rotate the second chuck 9 to adjust the torsion of the spring 7.
[0035] The inner side of the shaft tube 4 is protruded with a clamping strip 13, the clamping strip 13 is arranged in extension along the axial direction of the shaft tube 4, in the embodiment, the length of the clamping strip 13 is the same as that of the shaft tube 4, and a plurality of clamping strips 13 are equidistantly arranged along the circumferential direction of the shaft tube 4; the head of the first chuck 8 is engaged with the clamping strip 13 to realize circumferential limiting, and the first chuck 8 can slide along the clamping strip 13.
[0036] Both ends of the shaft tube 4 are provided with shaft sleeves 14, the shaft sleeves 14 are sleeved on the second chuck 9, the shaft sleeves 14 and the second chuck 9 can rotate relative to each other, the end of the shaft tube 4 is sleeved on the shaft sleeve 14, the circumferential wall of the shaft sleeve 14 is protruded with a positioning block 15, the positioning block 15 is inserted into the gap between adjacent clamping strips 13, so that the positioning block 15 is engaged with the clamping strip 13 to realize the circumferential limiting between the shaft sleeve 14 and the shaft tube 4.
[0037] As shown in Figure 5 As shown in Figure 6 The frame includes an upper frame 1 and a lower frame 2, the rotating shaft is arranged in the upper frame 1, and the left and right ends of the upper frame 1 and the lower frame 2 are connected through vertical frames 3 respectively. The left and right ends of the fixed plate 6 are inserted into the vertical frames 3 on the two sides and slide along the vertical frames 3.
[0038] The vertical frame 3 is provided with a notch 16 which penetrates the vertical frame 3 along the length direction of the vertical frame 3, and the upper frame 1 and the lower frame 2 are inserted into the notch 16 and are clamped through friction. The connecting mode of the notch 16 allows a sliding error of several millimeters to be used in the perfect cooperation, so that the height of the frame can be changed, and the overall stability, quality stability and practicability of the product in use are improved.
[0039] The working process of the utility model is as follows:
[0040] When the user pulls down the net 5, the shaft tube 4 and the first chuck 8 follow the rotation, the second chuck 9 remains stationary, the spring 7 is twisted, the fixed plate 6 is fixed with the frame bottom through the fixed assembly 17, when the net 5 needs to be retracted, the fixed assembly 17 is released, the spring 7 rebounds to drive the shaft tube 4 to rotate reversely to automatically retract the net 5.
[0041] When the user needs to increase the torsion of the spring 7, the fixed plate 6 is first fixed on the frame bottom, the first chuck 8 remains stationary, a hexagonal wrench is inserted into the operation hole 12 to rotate the second chuck 9, the spring 7 is twisted, the torsion of the spring 7 is increased, and each time the pawl is rotated to the clamping groove 11, it is a gear position.
[0042] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. within the design concept of the present application shall be included in the protection scope of the present application.
Claims
1. A torque-adjustable roller shutter door / window, comprising a frame, a roller shutter, and a spring rewind mechanism, wherein a shaft tube is rotatably connected to the frame, a fixed plate is slidably connected to the frame, one end of the roller shutter is connected to the fixed plate, and the other end is wound around the shaft tube, characterized in that: The spring retraction mechanism comprises a spring arranged along the length direction of the shaft tube, two ends of the spring are respectively connected with a first clamp and a second clamp, the first clamp penetrates into the shaft tube and is limited along the circumferential direction of the shaft tube, the second clamp is rotationally connected to the frame and can rotate relative to the shaft tube, a one-way limiting assembly for limiting the rotation direction of the second clamp is arranged between the second clamp and the frame.
2. A torsion-adjustable roller shutter door and window according to claim 1, characterized in that: The spring is coaxially arranged with the shaft tube, the first clamp slides relative to the shaft tube along the axial direction of the shaft tube, and the second clamp is limited on the frame along the axial direction of the shaft tube.
3. The torsion-adjustable roller shutter door and window according to claim 1, characterized in that: The one-way limiting assembly comprises a ratchet wheel arranged at the end of the second clamp away from the shaft tube, a sink groove is formed in the side wall of the frame, the ratchet wheel rotates in the sink groove, a clamping groove matched with the ratchet wheel is formed in the inner circumferential wall of the sink groove, and when the net is pulled downward, the second clamp is limited by the one-way limiting assembly and cannot rotate.
4. A torsion-adjustable roller shutter door or window according to claim 3, characterised in that: A plurality of pawls are arranged on the circumferential side of the ratchet wheel, the pawls are equidistantly arranged along the circumferential direction of the ratchet wheel, and the pawls are clamped and matched with the clamping groove.
5. The torsion-adjustable roller shutter door and window according to claim 3, characterized in that: A plurality of operating holes are coaxially formed in the ratchet wheel, and the operating holes are polygonal.
6. The torsion-adjustable roller shutter door and window according to claim 1, characterized in that: A clamping strip is protruded on the inner side of the shaft tube, the clamping strip extends along the axial direction of the shaft tube, a plurality of clamping strips are arranged along the circumferential direction of the shaft tube, and the first clamp is engaged with the clamping strip to realize circumferential limiting.
7. A torsion-adjustable roller shutter door or window according to claim 6, characterised in that: Shaft sleeves are arranged at two ends of the shaft tube respectively, the shaft sleeves are sleeved on the second clamps, the shaft tube is sleeved on the shaft sleeves, a positioning block is protruded on the circumferential wall of the shaft sleeve, and the positioning block is engaged with the clamping strip to realize the circumferential limiting between the shaft sleeve and the shaft tube.
8. The torsion-adjustable roller shutter door and window according to claim 1, characterized in that: The frame comprises an upper frame and a lower frame, left and right ends of the upper frame and the lower frame are connected through vertical frames respectively.
9. A torsion-adjustable roller shutter door or window according to claim 8, characterised in that: A slot is formed in the vertical frame, the slot penetrates through the vertical frame along the length direction of the vertical frame, and the upper frame and the lower frame penetrate into the slot and are clamped through friction force.