Telescopic swimming pool cover

Abstract

The utility model provides a telescopic swimming pool cover which is used for covering a swimming pool, the swimming pool cover comprises a plurality of sliding covers which are nested in a sliding mode, each sliding cover comprises a top cover, a first side cover and a second side cover, the first side cover and the second side cover extend out of the two sides of the top cover, and the first side cover and the second side cover are oppositely arranged. Pulleys are respectively arranged at the bottom ends, far away from the top cover, of the first side cover and the second side cover; the pulleys are supported on a swimming pool bank of the swimming pool and can slide along the swimming pool bank; at least one of the two adjacent sliding covers is provided with a guide wheel, the axis of the guide wheel is perpendicular to the axis of the pulley, and the guide wheel is in contact with the first side cover and / or the second side cover of the other sliding cover, so that the guide wheel is arranged between the two first side covers and / or the two second side covers of the two adjacent sliding covers.

Description

Technical Field

[0001] The utility model relates to the technical field of swimming pool covers, in particular to a retractable swimming pool cover. Background Art

[0002] At present, most swimming pools installed outdoors are equipped with swimming pool covers to prevent them from being exposed to the weather for a long time. Existing swimming pool covers are usually made up of multiple swimming pool sub-covers, and each swimming pool sub-cover is equipped with wheels to slide along the pool bank. However, the swimming pool cover currently needs to be equipped with tracks on the pool bank so that the wheels can slide on the tracks to achieve the sliding of the swimming pool cover. However, this not only increases the cost, but also is not conducive to installation and disassembly because the tracks need to be installed on the pool bank. Utility Model Content

[0003] In view of this, the present application provides a retractable swimming pool cover that is easy to install and reduces costs.

[0004] The present application provides a retractable swimming pool cover for covering a swimming pool, the swimming pool cover comprising a plurality of sliding covers which are slidably nested with each other, each sliding cover comprising a top cover and a first side cover and a second side cover extending from two sides of the top cover, the first side cover and the second side cover being arranged opposite to each other, the first side cover and the second side cover being respectively provided with pulleys at their bottom ends away from the top cover, the pulleys being supported on a pool bank of the swimming pool and being able to slide along the pool bank; at least one of the two adjacent sliding covers being provided with a guide wheel, the axis of the guide wheel being perpendicular to the axis of the pulley, and the guide wheel being in contact with the first side cover and / or the second side cover of the other sliding cover, so that the guide wheel is provided between the two first side covers and / or the two second side covers of the two adjacent sliding covers.

[0005] Further, the guide wheel includes an inner guide wheel and an outer guide wheel, the sliding cover includes a front sliding cover and a rear sliding cover located at the front and rear of the swimming pool cover, and one or more intermediate sliding covers located between the front sliding cover and the rear sliding cover, the front sliding cover is provided with an outer guide wheel, or the rear sliding cover is provided with an inner guide wheel, or each of the intermediate sliding covers is provided with an inner guide wheel and / or the outer guide wheel, the inner guide wheel is located on the side of the sliding cover facing the swimming pool, and the outer guide wheel is located on the side of the sliding cover facing away from the swimming pool.

[0006] Further, the guide wheel includes an inner guide wheel and an outer guide wheel, the sliding cover includes a front sliding cover and a rear sliding cover located at the front and rear of the swimming pool cover, and one or more intermediate sliding covers located between the front sliding cover and the rear sliding cover, the front sliding cover is provided with an outer guide wheel, the rear sliding cover is provided with an inner guide wheel, each of the intermediate sliding covers is provided with an inner guide wheel and / or the outer guide wheel, the inner guide wheel is located on the side of the sliding cover facing the swimming pool, and the outer guide wheel is located on the side of the sliding cover away from the swimming pool, the inner guide wheels and the outer guide wheels of two adjacent sliding covers are arranged opposite to each other, and there is a certain gap in the vertical direction.

[0007] Furthermore, the axis centers of the inner guide wheels and the outer guide wheels of two adjacent sliding covers are at different heights in the vertical direction.

[0008] Furthermore, in two adjacent sliding covers, the height of the axis center of the outer guide wheel of the sliding cover located on the inner side in the vertical direction is higher than the height of the axis center of the inner guide wheel of the sliding cover located on the outer side.

[0009] Furthermore, the first side cover and / or the second side cover is provided with a mounting groove arranged along the sliding direction of the sliding cover, the mounting groove includes two oppositely arranged groove walls, the groove wall is provided with an opening corresponding to the inner guide wheel or the outer guide wheel, the inner guide wheel or the outer guide wheel is exposed to the mounting groove through the opening and contacts with the groove wall of the other sliding cover.

[0010] Furthermore, the first side cover and the second side cover are respectively and completely detachably separated from the corresponding top cover.

[0011] Furthermore, each sliding cover includes an outer frame, an inner frame arranged in the outer frame, and a cover plate arranged in the inner frame and located on the outer frame, the outer frame encloses the frame of the top cover, the first side cover, and the second side cover, the outer frame includes two parallel transverse frames arranged on the top cover, two parallel first longitudinal frames arranged on the first side cover, and two second longitudinal frames arranged on the second side cover, and the two ends of each transverse frame are detachably connected to a first longitudinal frame and a second longitudinal frame at a certain angle through an adapter.

[0012] Furthermore, the adapter includes a base and a first plug-in portion extending from the base along a first direction and a second plug-in portion extending along a second direction, the first plug-in portion is inserted into the interior of the horizontal frame, and the second plug-in portion is inserted into the interior of the longitudinal frame; the base also includes a first groove parallel to the first plug-in portion and a second groove parallel to the second plug-in portion, the two ends of the top cover close to the first side cover and the second side cover are respectively engaged in the first groove, and the ends of the first side cover and the second side cover close to the top cover are respectively engaged in the second groove; wherein, the first groove and the second groove are integrally arranged, and a certain angle is formed between the first direction and the second direction.

[0013] Furthermore, each transverse frame includes a plurality of transverse sub-frames, and two adjacent transverse sub-frames are connected by connecting members.

[0014] Furthermore, one or more sliding covers are provided with windows, and the windows include a first sub-window parallel to the top cover and a second sub-window parallel to the first side cover, the end of the first sub-window away from the second sub-window is the first end, and the end of the second sub-window away from the first sub-window is the second end; the first end and the second end are respectively provided with two parallel sliding rods with a plurality of first through holes and a pulley member, and the pulley member is inserted into the first through holes and then fixed to the sliding rod; wherein, the sliding cover is respectively provided with sliding grooves at corresponding positions of the first end and the second end, the sliding rod is inserted into the interior of the sliding groove and has a certain gap with the inner wall of the sliding groove, the pulley member is placed in the interior of the sliding groove and contacts with the inner wall of the sliding groove, and the sliding rod and the pulley member move along the sliding groove to drive the window to move and thereby open or close the window.

[0015] The above-mentioned swimming pool cover includes a plurality of sliding covers that slide and nest with each other, so that the retractable swimming pool cover can be fully opened, fully closed or partially opened as needed, and the switch is convenient. The bottom ends of the first side cover and the second side cover away from the top cover are respectively provided with pulleys, and the pulleys are supported on the pool bank of the swimming pool and can slide along the pool bank. At least one of the two adjacent sliding covers is provided with a guide wheel, the axis of the guide wheel is perpendicular to the axis of the pulley, and the guide wheel contacts the first side cover and / or the second side cover of the other sliding cover. When the swimming pool cover is extended and retracted, the guide wheel on one sliding cover slides horizontally on the other sliding cover, reducing the friction between the adjacent sliding covers during extension and retraction, so that the swimming pool cover can be extended and retracted smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 It is a schematic structural diagram of the retractable swimming pool cover provided in this embodiment.

[0018] Figure 2 It is a schematic diagram of the combined structure of the guide wheel and the mounting groove provided in this embodiment.

[0019] Figure 3 Schematic diagram of the structure of the mounting base provided in this embodiment.

[0020] Figure 4 It is a schematic structural diagram of the first longitudinal frame provided in this embodiment.

[0021] Figure 5 Schematic diagram of the structure of the adapter provided in this embodiment.

[0022] Figure 6 It is a schematic diagram of the structure of the first sub-chute provided in this embodiment.

[0023] Figure 7 This is a schematic diagram of the structure of the second sub-chute provided in this embodiment.

[0024] Figure 8 It is a schematic diagram of the combined structure of the swimming pool and the swimming pool cover provided in this embodiment.

[0025] Description of the symbols of the accompanying drawings:

[0026] 1 Top cover 2 First side cover 3 Second side cover

[0027] 4 Slide cover 41 Front slide cover 42 Rear slide cover

[0028] 43 middle slide cover 5 pulley 6 guide wheel

[0029] 61 Inner guide wheel 62 Outer guide wheel 7 Mounting slot

[0030] 71 groove wall 72 opening 73 mounting seat

[0031] 731 Mounting seat body 732 Mounting portion 7321 Second through hole

[0032] 8 outer border 81 first vertical border 82 second vertical border

[0033] 83 horizontal border 831 horizontal sub-border 9 inner border

[0034] 10 Cover plate 11 Connector 12 Adapter

[0035] 121 base 1211 first groove 1212 second groove

[0036] 122 first plug-in portion 123 second plug-in portion 13 window

[0037] 131 first sub-window 1311 first end 132 second sub-window

[0038] 1321 second end 133 slide bar 134 pulley member

[0039] 1341 connector 14 slide 141 first sub-slide

[0040] 142 second sub-slide groove 143 arc-shaped groove 15 baffle

[0041] 151 Front baffle 152 Rear baffle 16 Fixed lock

[0042] 161 Lock bolt 17 Limiter 100 Pool cover

[0043] 200 Swimming Pool 201 Pool Shore

[0044] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0046] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar planning objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate. In other words, the described embodiments are implemented according to a sequence other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations may also include other content. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to only those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] It should be noted that the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0048] A pool cover is a protective facility that can easily cover the swimming pool. It can effectively block debris, protect the swimming pool from external interference, and prevent accidents. In addition, the pool cover can slow down water evaporation and maintain the water temperature of the swimming pool, thereby reducing the heating energy cost of the swimming pool and the use of cleaning chemicals, reducing maintenance costs.

[0049] See also Figure 1 and Figure 8 , Figure 1 is a schematic diagram of the structure of the retractable swimming pool cover provided in this embodiment, Figure 8 1 is a schematic diagram of the combined structure of a swimming pool and a swimming pool cover provided in this embodiment. The present application provides a retractable swimming pool cover 100 for covering a swimming pool 200. The swimming pool cover 100 includes a plurality of sliding covers 4, pulleys 5, and guide wheels 6 that are slidably nested with each other.

[0050] Each sliding cover 4 includes a top cover 1 and a first side cover 2 and a second side cover 3 extending from both sides of the top cover 1. The first side cover 2 and the second side cover 3 are arranged opposite to each other, and the bottom ends of the first side cover 2 and the second side cover 3 away from the top cover 1 are respectively provided with pulleys 5, the pulleys 5 are supported on the pool bank 201 of the swimming pool 200 and can slide along the pool bank 201, and the first side cover 2 and the second side cover 3 are respectively and completely detachably separated from the corresponding top cover 1. At least one of the two adjacent sliding covers 4 is provided with a guide wheel 6, the axis of the guide wheel 6 is perpendicular to the axis of the pulley 5, and the guide wheel 6 contacts the first side cover 2 and / or the second side cover 3 of the other sliding cover 4, so that the guide wheel 6 is provided between the two first side covers 2 and / or the two second side covers 3 of the two adjacent sliding covers 4. In this embodiment, the retractable swimming pool cover 100 can be fully opened, fully closed or partially opened as needed, and the switching is convenient. Specifically, when in use, the swimming pool cover 100 is directly covered on top of the swimming pool 200, and then the area covered by the swimming pool 200 is freely adjusted by retracting the swimming pool cover 100. When not in use, all the sliding covers 4 are directly retracted together.

[0051] The slide cover 4 includes a front slide cover 41 and a rear slide cover 42 located at the front and rear ends of the swimming pool cover 100, and one or more intermediate slide covers 43 located between the front slide cover 41 and the rear slide cover 42. In this embodiment, the size of the front slide cover 41 is smaller than the intermediate slide cover 43, and the size of the intermediate slide cover 43 is smaller than the rear slide cover 42. When there are multiple intermediate slide covers 43, the size of the intermediate slide cover 43 close to the front slide cover 41 is smaller than the size of the intermediate slide cover 43 close to the rear slide cover 42. It can be understood that when fully retracted, the front slide cover 41 is completely nested inside the intermediate slide cover 43, and the intermediate slide cover 43 is completely nested inside the rear slide cover 42. In this embodiment, the number of the middle slide covers 43 is two. In addition, the swimming pool cover 100 also includes a front baffle 151 and a rear baffle 152. The front baffle 151 is vertically arranged on the side of the front slide cover 41 away from the rear slide cover 42, and the rear baffle 152 is vertically arranged on the side of the rear slide cover 42 away from the front slide cover 41. The middle slide cover 43 is not provided with a baffle 15, and the front baffle 151 and the rear baffle 152 are detachably connected to the front slide cover 41 and the rear slide cover 42 respectively.

[0052] Please refer to Figure 2 , Figure 2 : is a schematic diagram of the combined structure of the guide wheel and the mounting groove provided in this embodiment. The guide wheel 6 includes an inner guide wheel 61 and an outer guide wheel 62, and the axis centers of the inner guide wheel 61 and the outer guide wheel 62 of two adjacent sliding covers 4 are at different heights in the vertical direction. In two adjacent sliding covers 4, the axis center height of the outer guide wheel 62 of the sliding cover 4 located on the inner side in the vertical direction is higher than the axis center height of the inner guide wheel 61 of the sliding cover 4 located on the outer side. In this embodiment, when the swimming pool cover 100 is extended or retracted, the sliding tracks of the inner guide wheel 61 and the outer guide wheel 62 of the two adjacent sliding covers 4 are staggered with each other.

[0053] At least one of the two adjacent sliding covers 4 is provided with a guide wheel 6, the inner guide wheel 61 is located on the side of the sliding cover 4 facing the swimming pool 200, and the outer guide wheel 62 is located on the side of the sliding cover 4 away from the swimming pool 200. The front sliding cover 41 is provided with an outer guide wheel 62, the rear sliding cover 42 is provided with an inner guide wheel 61, and each intermediate sliding cover 43 is provided with an inner guide wheel 61 and / or an outer guide wheel 62. The inner guide wheels 61 and the outer guide wheels 62 of the two adjacent sliding covers 4 are arranged opposite to each other, and there is a certain gap in the vertical direction. In this embodiment, the front sliding cover 41 is provided with an outer guide wheel 62, the rear sliding cover 42 is provided with an inner guide wheel 61, and each intermediate sliding cover 43 is provided with an inner guide wheel 61 and an outer guide wheel 62. In some feasible embodiments, the front sliding cover 41 is provided with an outer guide wheel 62, or the rear sliding cover 42 is provided with an inner guide wheel 61, or each intermediate sliding cover 43 is provided with an inner guide wheel 61 and / or an outer guide wheel 62. For example, the front sliding cover 41 is provided with an outer guide wheel 62, the rear sliding cover 42 is not provided with an inner guide wheel 61, and each intermediate sliding cover 43 is provided with an outer guide wheel 62, wherein each intermediate sliding cover 43 may also be provided with an inner guide wheel 61 on the basis of being provided with an outer guide wheel 62. For another example, the front sliding cover 41 is not provided with an outer guide wheel 62, the rear sliding cover 42 is provided with an inner guide wheel 61, and each intermediate sliding cover 43 is provided with an inner guide wheel 61, wherein each intermediate sliding cover may also be provided with an outer guide wheel 62 on the basis of being provided with an inner guide wheel 61.

[0054] The first side cover 2 and / or the second side cover 3 are provided with a mounting groove 7 arranged along the sliding direction of the slide cover 4, for mounting the guide wheel 6 and for the guide wheel 6 to slide. Specifically, the mounting groove 7 includes two groove walls 71 arranged opposite to each other, and the groove wall 71 is provided with an opening 72 corresponding to the inner guide wheel 61 or the outer guide wheel 62. The inner guide wheel 61 or the outer guide wheel 62 is exposed to the mounting groove 7 through the opening 72 and contacts the groove wall 71 of the other slide cover 4. In this embodiment, when the swimming pool cover 100 is extended and retracted, the outer guide wheel 62 of the inner slide cover 4 of the two adjacent slide covers 4 slides horizontally on the groove wall 71 of the outer slide cover 4, and the inner guide wheel 62 of the outer slide cover 4 slides horizontally on the groove wall 71 of the inner slide cover 4, thereby reducing the friction between the adjacent slide covers 4 during extension and retraction, so that the swimming pool cover 100 can be extended and retracted smoothly. In this embodiment, both the first side cover 2 and the second side cover 3 are provided with a mounting groove 7, that is, the first side cover 2 and the second side cover 3 are both provided with guide wheels 6. In some feasible embodiments, the first side cover 2 or the second side cover 3 is provided with a mounting groove 7 , that is, only one side of the first side cover 2 and the second side cover 3 is provided with the guide wheel 6 .

[0055] Please refer to Figure 3 , Figure 3: is a schematic diagram of the structure of the mounting seat provided in this embodiment. The inner guide wheel 61 and the outer guide wheel 62 are fixed to the groove wall 71 of the mounting groove 7 through the mounting seat 73. Specifically, the mounting seat 73 includes a mounting seat body 731 and two mounting parts 732 with second through holes 7321 extending from the mounting seat body 731 on opposite sides. The groove wall 71 is provided with a third through hole (not shown) at a position corresponding to the second through hole 7321 of the mounting part 732. A part of the inner guide wheel 61 and the outer guide wheel 62 are placed inside the mounting seat body 731, and the other part passes through the opening 72 of the groove wall 71 to contact the outer wall of the groove wall 71 of the other sliding cover 4. The two mounting parts 732 of the mounting seat 73 are attached to the groove wall 71. It can be understood that the mounting seat 73 also includes a fastener (not shown). The fastener passes through the third through hole of the groove wall 71 and the second through hole 7321 of the mounting part 732 in sequence to fix the mounting seat 73 on the groove wall 71. The fastener can be a bolt or other component for fixing.

[0056] Please refer to Figure 4 , Figure 4 1 is a schematic diagram of the structure of the first longitudinal frame provided in the present embodiment. Each sliding cover 4 includes an outer frame 8, an inner frame 9 arranged inside the outer frame 8, and a cover plate 10 arranged on the inner frame 9 and located on the outer frame 8. The outer frame 8 forms a frame of the top cover 1, the first side cover 2, and the second side cover 3. The outer frame 8 includes two parallel transverse frames 83 arranged on the top cover 1, two parallel first longitudinal frames 81 arranged on the first side cover 2, and two second longitudinal frames 82 arranged on the second side cover 3. The two ends of each transverse frame 83 are detachably connected to a first longitudinal frame 81 and a second longitudinal frame 82 at a certain angle through an adapter 12, respectively. Each transverse frame 83 includes a plurality of transverse sub-frames 831, and two adjacent transverse sub-frames 831 are connected through a connector 11. In this embodiment, the inner frame 9 and the outer frame 8 are both made of super strong tubular aluminum with a cross-sectional size of 45*65mm or more, and the cover 10 is made of 3-4mm solid endurance board or 8mm hollow polycarbonate sun board. The ultraviolet protection on the surface of the cover 10 can filter out 98% of ultraviolet rays. Therefore, the swimming pool cover 100 as a whole not only has stability and safety, but also has good ultraviolet protection function.

[0057] Please refer to Figure 5 , Figure 5: is a schematic diagram of the structure of the adapter provided in this embodiment. The adapter 12 includes a base 121, a first plug-in portion 122 extending from the base 121 along the first direction, and a second plug-in portion 123 extending along the second direction. The first plug-in portion 122 is inserted into the interior of the horizontal frame 83, and the second plug-in portion 123 is inserted into the interior of the first longitudinal frame 81 or the second longitudinal frame 82; the base 121 also includes a first groove 1211 parallel to the first plug-in portion 122 and a second groove 1212 parallel to the second plug-in portion 123. The two ends of the top cover 1 close to the first side cover 2 and the second side cover 3 are respectively engaged in the first groove 1211, and the ends of the first side cover 2 and the second side cover 3 close to the top cover 1 are respectively engaged in the second groove 1212. Among them, the first groove 1211 and the second groove 1212 are integrally arranged, and a certain angle is formed between the first direction and the second direction. In this embodiment, the end face of the first plug-in portion 122 extending from the adapter 12 is matched with the end face of the horizontal frame 83, and the end face of the second plug-in portion 123 extending from the adapter 12 is matched with the end faces of the longitudinal frames 81, 82, wherein an acute angle is formed between the two end faces, an obtuse angle is formed between the first direction and the second direction, and the angle between each horizontal frame 83 and the longitudinal frame 81, 82 is equal to the angle between the first direction and the second direction.

[0058] Please refer to Figure 6 and Figure 7 , Figure 6 is a schematic diagram of the structure of the first sub-chute provided in this embodiment, Figure 71 is a schematic diagram of the structure of the second sub-slide groove provided in this embodiment. One or more sliding covers 4 are provided with windows 13, the windows 13 include a first sub-window 131 parallel to the top cover 1 and a second sub-window 132 parallel to the first side cover 2, the end of the first sub-window 131 away from the second sub-window 132 is a first end 1311, and the end of the second sub-window 132 away from the first sub-window 131 is a second end 1321. The first end 1311 and the second end 1321 are respectively provided with two parallel slide bars 133 with a plurality of first through holes (not shown) and a pulley 134. The pulley 134 is inserted into the first through hole of the slide bar 133 and then fixed to the slide bar 133. Specifically, a plug-in 1341 extends from the center of the pulley 134. The plug-in 1341 is inserted into the first through hole on the slide bar 133 and then the pulley 134 is fixed to the slide bar 133. The first end 1311 and the second end 1321 are respectively provided with four pulleys 134. The four pulleys 134 are arranged at two ends of the first end 1311 or the second end 1321, and the two pulleys 134 at each end are respectively arranged on different slide bars 133. In this embodiment, a window handle (not shown) is also provided at the end of the window 13. The window handle is used to assist in opening or closing the window 13. The window 13 is generally L-shaped, and the window 13 can partially open the swimming pool cover 100 without retracting the swimming pool cover 100, for ventilation and convenient entry into the swimming pool 200 or viewing the swimming pool 200. In this embodiment, the window 13 is set in the rear sliding cover 42. In other feasible embodiments, the window 13 can also be set in the middle sliding cover 43 or the front sliding cover 41. The position of the window 13 and the number of the windows 13 are not limited here.

[0059] The sliding cover 4 is provided with a sliding groove 14 at the corresponding positions of the first end 1311 and the second end 1321. In this embodiment, the sliding groove 14 includes a first sub-sliding groove 141 and a second sub-sliding groove 142 provided on opposite sides of the window 13, the first sub-sliding groove 141 corresponds to the first end 1311, the second sub-sliding groove 142 corresponds to the second end 1321, and the window 13 slides between the first sub-sliding groove 141 and the second sub-sliding groove 142. The sliding groove 14 is generally U-shaped, and the notch direction of the first sub-sliding groove 141 is perpendicular to the notch direction of the second sub-sliding groove 142.

[0060] The slide bar 133 is inserted into the slide groove 14 and has a certain gap with the inner wall of the slide groove 14. The pulley member 134 is placed in the slide groove 14 and contacts the inner wall of the slide groove 14. The slide bar 133 and the pulley member 134 move along the slide groove 14 to drive the window 13 to move and then open or close the window 13. In this embodiment, the inner wall of the slide groove 14 is provided with an arc groove 143 coupled with the pulley member 134, wherein the number of the arc grooves 143 is 4 and they are arranged in pairs on both sides of the slide groove 14 opposite to the slide bar 133, and the two arc grooves 143 on each side are arranged on the upper and lower sides of the pulley member 134 opposite to each other, and the pulley member 134 is in sliding contact with the arc groove 143.

[0061] Please see again Figure 4 The swimming pool cover 100 also includes a fixing lock 16 for fixing the swimming pool cover 100. The fixing lock 16 is arranged at one end of the longitudinal frames 81, 82 close to the swimming pool 200. A movable locking bolt 161 is arranged inside the fixing lock 16. The swimming pool cover 100 is fixed to the swimming pool bank 201 through the locking bolt 161. It can be understood that the corresponding positions of the swimming pool bank 201 and the fixing lock 16 are also provided with fixing holes (not shown in the figure). The locking bolt 161 is inserted into the fixing hole to fix the swimming pool cover 100 on the swimming pool bank 201 to protect the swimming pool cover 100 from being destroyed by bad weather.

[0062] The swimming pool cover 100 further includes a stopper 17, which is disposed at the ends of the longitudinal frames 81 and 82 close to the adjacent sliding covers 4, and is used to limit the relative positions between the adjacent sliding covers 4. It can be understood that when the adjacent sliding covers 4 are nested, the inner sliding cover 4 is first sleeved inside the outer sliding cover 4, and then the stopper 17 is installed at the ends of the longitudinal frames 81 and 82 of the outer sliding cover 4 close to the inner sliding cover 4, so that the adjacent sliding covers 4 are not separated when the swimming pool cover 100 is extended.

[0063] In summary, the retractable swimming pool cover 100 provided in the present application can be smoothly extended and retracted without the need to cooperate with the swimming pool cover track. Specifically, first, the swimming pool cover 100 includes a plurality of sliding covers 4 that slide and nest with each other, so that the retractable swimming pool cover 100 can be fully opened, fully closed or partially opened as needed, and the switching is convenient. Second, the bottom ends of the first side cover 2 and the second side cover 3 away from the top cover 1 are respectively provided with pulleys 5, and the pulleys 5 are supported on the pool bank 201 of the swimming pool 200 and can slide along the pool bank 201. Third, at least one of the two adjacent sliding covers 4 is provided with a guide wheel 6, the axis of the guide wheel 6 is perpendicular to the axis of the pulley 5, and the guide wheel 6 is in contact with the first side cover 2 and / or the second side cover 3 of the other sliding cover 4. When the swimming pool cover 100 is extended and retracted, the guide wheel 6 on one sliding cover 4 slides horizontally on the other sliding cover 4, reducing the friction between the adjacent sliding covers 4 during extension and retraction, so that the swimming pool cover 100 can be smoothly extended and retracted.

[0064] The above are only preferred embodiments of the utility model, but do not limit the patent scope of the utility model. Although the utility model is described in detail with reference to the above embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the above specific implementations, or replace some of the technical features with equivalents. Any equivalent structure made by using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the utility model patent.

Claims

1. A retractable swimming pool cover for covering a swimming pool, characterized in that: The swimming pool cover comprises a plurality of sliding covers which are slidably nested with each other, each sliding cover comprises a top cover and a first side cover and a second side cover extending from both sides of the top cover, the first side cover and the second side cover are arranged opposite to each other, and the first side cover and the second side cover are respectively provided with pulleys at their bottom ends away from the top cover, the pulleys are supported on the pool bank of the swimming pool and can slide along the pool bank; at least one of the two adjacent sliding covers is provided with a guide wheel, the axis of the guide wheel is perpendicular to the axis of the pulley, and the guide wheel is in contact with the first side cover and / or the second side cover of the other sliding cover, so that the guide wheel is provided between the two first side covers and / or the two second side covers of the two adjacent sliding covers.

2. The retractable swimming pool cover according to claim 1, characterized in that: The guide wheels include inner guide wheels and outer guide wheels, the sliding cover includes a front sliding cover and a rear sliding cover located at the front and rear of the swimming pool cover, and one or more intermediate sliding covers located between the front sliding cover and the rear sliding cover, the front sliding cover is provided with an outer guide wheel, or the rear sliding cover is provided with an inner guide wheel, or each of the intermediate sliding covers is provided with an inner guide wheel and / or the outer guide wheel, the inner guide wheel is located on the side of the sliding cover facing the swimming pool, and the outer guide wheel is located on the side of the sliding cover facing away from the swimming pool.

3. The retractable swimming pool cover according to claim 1, characterized in that: The guide wheels include inner guide wheels and outer guide wheels, the sliding cover includes a front sliding cover and a rear sliding cover located at the front and rear of the swimming pool cover, and one or more intermediate sliding covers located between the front sliding cover and the rear sliding cover, the front sliding cover is provided with an outer guide wheel, the rear sliding cover is provided with an inner guide wheel, each of the intermediate sliding covers is provided with an inner guide wheel and / or the outer guide wheel, the inner guide wheel is located on the side of the sliding cover facing the swimming pool, the outer guide wheel is located on the side of the sliding cover away from the swimming pool, the inner guide wheels and the outer guide wheels of two adjacent sliding covers are arranged opposite to each other, and there is a certain gap in the vertical direction.

4. The retractable swimming pool cover according to claim 3, characterized in that: The axis centers of the inner guide wheels and the outer guide wheels of two adjacent sliding covers are at different heights in the vertical direction.

5. The retractable swimming pool cover according to claim 4, characterized in that: In two adjacent sliding covers, the height of the axis center of the outer guide wheel of the sliding cover located on the inner side in the vertical direction is higher than the height of the axis center of the inner guide wheel of the sliding cover located on the outer side.

6. The retractable swimming pool cover according to claim 4, characterized in that: The first side cover and / or the second side cover is provided with a mounting groove arranged along the sliding direction of the sliding cover, and the mounting groove includes two oppositely arranged groove walls, and the groove wall is provided with an opening corresponding to the inner guide wheel or the outer guide wheel. The inner guide wheel or the outer guide wheel is exposed to the mounting groove through the opening and contacts with the groove wall of the other sliding cover.

7. The retractable swimming pool cover according to claim 1, characterized in that: The first side cover and the second side cover are respectively and completely detachably separated from the corresponding top cover.

8. The retractable swimming pool cover according to claim 7, characterized in that: Each sliding cover includes an outer frame, an inner frame arranged in the outer frame, and a cover plate arranged in the inner frame and located on the outer frame, the outer frame surrounds the frame of the top cover, the first side cover, and the second side cover, the outer frame includes two parallel transverse frames arranged on the top cover, two parallel first longitudinal frames arranged on the first side cover, and two second longitudinal frames arranged on the second side cover, and the two ends of each transverse frame are detachably connected to a first longitudinal frame and a second longitudinal frame at a certain angle through an adapter.

9. The retractable swimming pool cover according to claim 8, characterized in that: The adapter includes a base, a first plug-in portion extending from the base along a first direction, and a second plug-in portion extending along a second direction, the first plug-in portion is inserted into the interior of the horizontal frame, and the second plug-in portion is inserted into the interior of the longitudinal frame; the base also includes a first groove parallel to the first plug-in portion and a second groove parallel to the second plug-in portion, the two ends of the top cover close to the first side cover and the second side cover are respectively engaged with the first groove, and the ends of the first side cover and the second side cover close to the top cover are respectively engaged with the second groove; wherein, the first groove and the second groove are integrally arranged, and a certain angle is formed between the first direction and the second direction.

10. The retractable swimming pool cover according to claim 8, characterized in that: Each transverse frame includes a plurality of transverse sub-frames, and two adjacent transverse sub-frames are connected by connecting pieces.

11. The retractable swimming pool cover according to claim 1, characterized in that: One or more sliding covers are provided with windows, and the windows include a first sub-window parallel to the top cover and a second sub-window parallel to the first side cover, the end of the first sub-window away from the second sub-window is the first end, and the end of the second sub-window away from the first sub-window is the second end; the first end and the second end are respectively provided with two parallel sliding rods with a plurality of first through holes and a pulley member, and the pulley member is inserted into the first through holes and then fixed to the sliding rod; wherein, the sliding cover is respectively provided with sliding grooves at corresponding positions of the first end and the second end, the sliding rod is inserted into the interior of the sliding groove and has a certain gap with the inner wall of the sliding groove, the pulley member is placed in the interior of the sliding groove and contacts with the inner wall of the sliding groove, and the sliding rod and the pulley member move along the sliding groove to drive the window to move and thus open or close the window.

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