Patent Publication Number: US-2022211150-A1

Title: Umbrella sliding assembly

Description:
TECHNICAL FIELD 
     The disclosure relates to a technical field of outdoor furniture, in particular to a umbrella sliding assembly. 
     BACKGROUND ART 
     With continuous development of society, a parasol with functions of shielding sunlight and providing shade are widely used in families, swimming pools, hotels, guesthouses and other entertainment services. Such a parasol generally includes a post on which a slider is provided, the slider is connected with a canopy through a connecting rod and can slide along a longitudinal direction of the post. When the canopy is opened or closed, the slider moves to different positions on the post in cooperation with the post. However, an existing slider is generally connected with the post in a sliding fit, and sliding friction between the slider and the post is large, which is easy to cause a problem of unsmooth sliding. Meanwhile, it is easy to cause great wear on the post, and to cause damage and deformation on a surface of the post after being used for a long time. 
     SUMMARY 
     In view of above problems and in order to overcome at least one of shortcomings, the disclosure provides a umbrella sliding assembly. 
     Technical schemes adopted in the disclosure is as follows. 
     A umbrella sliding assembly includes: 
     a post provided with a first track groove and a second track groove which are longitudinally disposed; 
     a slider longitudinally movably mounted to the post; 
     at least two first pulleys rotatably mounted to the slider and arranged in a row along a longitudinal direction of the slider, the first pulleys extending into the first track groove and bringing the first pulleys to abut against an inner wall of the first track groove; 
     at least two second pulleys rotatably mounted on the slider and arranged in a row along the longitudinal direction of the slider, the second pulleys extending into the second track groove and bringing the second pulleys to abut against an inner wall of the second track groove; and 
     a fixing piece mounted on the slider and including a fixing part matchingly fixed with the post, when the fixing part is matchingly fixed with the post, the slider being fixed to the post, and when the fixing part is separated from the post, the slider being movable along a longitudinal direction of the post. 
     In an embodiment of the disclosure, the first track groove is formed by recessing inwardly a side of the post, and the first pulley abuts against a side wall of the first track groove; the second track groove is formed by recessing inwardly two side walls of the first track groove respectively, and the second pulley abuts against a bottom wall of the second track groove. 
     In an embodiment of the disclosure, the second track groove includes two symmetrical groove bodies which are respectively arranged on two side walls of the first track groove, and cross section of each of the groove bodies is a right-angled trapezoid in shape, and a lower bottom edge of the right-angled trapezoid corresponds to a bottom wall of the groove body. 
     In an embodiment of the disclosure, the slider includes a handle portion, a strip-shaped mounting portion, at least two first mounting posts and a strip-shaped inner liner. The handle portion is connected to one side of the mounting portion, while another side of the mounting portion is provided with at least two mounting grooves in which the first mounting posts are provided, the at least two first mounting posts are arranged in a row along a length direction of the mounting portion, and the first pulley and the second pulley are sleeved on the first mounting posts in turn so that the first pulley is loaded into the mounting groove, and the second pulley abuts against outside of the mounting groove; and the inner liner is arranged on another side of the second pulley and is fixed with the first mounting posts through fasteners, so that the first pulley and the second pulley are limited between the mounting portion and the inner liner. 
     In an embodiment of the disclosure, the slider further includes a second mounting post provided on the mounting portion, the second mounting post is located on a same line as the first mounting post, the second pulley is sleeved on the second mounting post, and the inner liner is fixed with the second mounting post through the fasteners, thereby limiting the second pulley between the mounting portion and the inner liner. 
     In an embodiment of the disclosure, the mounting groove is provided at a joint of the handle portion and the mounting portion. 
     In an embodiment of the disclosure, a free end of the fixing part faces the bottom wall of the first track groove, and the free end of the fixing part is provided with a latch for cooperating with the bottom wall of the first track groove to fix the fixing piece on the post. 
     In an embodiment of the disclosure, the bottom wall of the first track groove protrudes toward the fixing piece to form an arc-shaped protrusion, an end face of the free end of the fixing part is arranged in an arc shape, corresponding to the arc-shaped protrusion, and the latch is formed on the end face of the free end of the fixing part. 
     In an embodiment of the disclosure, the fixing piece also includes a knob and a connecting screw, and the fixing part movably passes through the slider which limits rotation of the fixing part. A threaded hole is provided in the fixing part, the knob is arranged at a rear end of the fixing part, and the connecting screw passes through the knob and is inserted into the threaded hole, thereby connecting the knob and the fixing part, so that the fixing part can be driven to move by turning the knob so as to approach or move away from the bottom wall of the first track groove. 
     Compared with the prior art, the disclosure has following beneficial effects: in the umbrella sliding assembly of the disclosure, only rolling friction exists between the first pulley, the second pulley and the post during moving of the slider, which presents a small friction force; and with the provision of the first pulley and the second pulley, the slider does not tilt during the moving, and in this way wear on the post can be reduced, and the slider moves smoothly without jamming. The umbrella sliding assembly is simple in structure, requires low matching accuracy and is simple in manufacturing process, which can greatly improve productivity; and meanwhile, it is stable in structure, not easy to be worn and has a long service life. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of states in which a slider slides to different positions on a post in a umbrella sliding assembly according to the disclosure; 
         FIG. 2  is a perspective view of a umbrella sliding assembly according to the disclosure; 
         FIG. 3  is a partial sectional view of a umbrella sliding assembly according to the disclosure; 
         FIG. 4  is an assembly view of a slider of a umbrella sliding assembly according to the disclosure; 
         FIG. 5  is an exploded view of a structure shown in  FIG. 4 ; 
         FIG. 6  is a sectional structural schematic diagram of a post of a umbrella sliding assembly according to the disclosure; and 
         FIG. 7  is a top view of a umbrella sliding assembly according to the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure will be described in detail with reference to the accompanying drawings. 
     With reference to  FIGS. 1 to 7 , the disclosure provides a umbrella sliding assembly, which includes a post  1 , a slider  2 , at least two first pulleys  3 , at least two second pulleys  4  and a fixing piece  5 . 
     The post  1  is provided with a first track groove  101  and a second track groove  102  which are longitudinally disposed. 
     The slider  2  is longitudinally movably mounted to the post  1 . 
     The at least two first pulleys  3  are rotatably mounted to the slider  2  and arranged in a row along a longitudinal direction of the slider  2 , the first pulleys  3  extend into the first track groove  101  and bringing the first pulleys  3  to abut against an inner wall of the first track groove  101 . 
     The at least two second pulleys  4  are rotatably mounted on the slider  2  and arranged in a row along the longitudinal direction of the slider  2 , the second pulleys  4  extend into the second track groove  102  and bringing the second pulleys  4  to abut against an inner wall of the second track groove  102 . 
     The fixing piece  5  is mounted on the slider  2  and includes a fixing part  51  matchingly fixed with the post  1 , when the fixing part  51  is matchingly fixed with the post  1 , the slider  2  is fixed to the post  1 , and when the fixing part  51  is separated from the post  1 , the slider  2  is movable along the longitudinal direction of the post  1 . 
     In the umbrella sliding assembly of the disclosure, the slider  2  can move along the post  1  and can be fixed at any position on the post  1  through the fixing piece  5 , as shown in  FIG. 1 . When the slider  2  is moved, the first pulley  3  rolls in the first track groove  101  and the second pulley  4  rolls in the second track groove  102 . The slider  2  moves through the rolling of the first pulley  3  and the second pulley  4 . The rolling friction resistance is very small, which can effectively reduce wear on the post  1  and greatly reduce probability of damage and deformation to the post  1 . 
     At least two first pulleys  3  and at least two second pulleys  4  are provided, which ensures force balance of the slider  2  during moving, so that the slider  2  does not tilt during the moving, friction between the first pulleys  3  and second pulleys  4  and the post  1  can be reduced, so that the slider  2  move more smoothly without jamming. 
     The umbrella sliding assembly is simple in structure, requires low matching accuracy and is simple in manufacturing process, which can greatly improve productivity; and meanwhile, it is stable in structure, not easy to be worn and has a long service life. 
     Further, the first track groove  101  is formed by recessing inwardly a side of the post  1 , and the first pulley  3  abuts against a side wall of the first track groove  101 . The second track groove  102  is formed by recessing inwardly two side walls of the first track groove  101  respectively, and the second pulley  4  abuts against a bottom wall of the second track groove  102 . In this embodiment, the second track groove  102  is arranged on the side wall of the first track groove  101 , which is equivalent to the first track groove  101  crossing the second track groove  102 . The second track groove  102  limits the second pulley  4 , while the second pulley  4  limits the first pulley  3 , so that the first pulley  3  rolls more smoothly in the first track groove  101 . 
     In this document, “recessing inwardly” only indicates a form, that is, a structure that is concave relative to a surface of an object, but not a processing method. That is to say, the structure can be an inwardly recessing structure that is directly formed in molding the post  1 , or an inwardly recessing structure that is formed by cutting, pressing, bending or other processing after the post  1  is molded, which is not limited in the disclosure. 
     Further, the second track groove  102  includes two symmetrical groove bodies which are respectively arranged on two side walls of the first track groove  101 , and cross section of each of the groove bodies is a right-angled trapezoid in shape, and a lower bottom edge of the right-angled trapezoid corresponds to a bottom wall of the groove body. The right-angled trapezoidal groove body makes one side of the second pulley  4  in surface contact with the second track groove  102 , and another side of the second pulley  4  in line contact with the second track groove  102 , which not only ensures stability of the second pulley  4  rolling in the second track groove  102 , but also reduces friction between the second pulley  4  and the second track groove  102 , thus ensuring smooth moving of the slider  2 . 
     Further, the slider  2  includes a handle portion  21 , a strip-shaped mounting portion  22 , at least two first mounting posts  23  and a strip-shaped lining member  24 . The handle portion  21  is connected to one side of the mounting portion  22 , while another side of the mounting portion  22  is provided with at least two mounting grooves  201 . The first mounting posts  23  are disposed in the mounting grooves  201 , and the at least two first mounting posts  23  are arranged in a row along a length direction of the mounting portion  22 . The first pulley  3  and the second pulley  4  are sleeved on the first mounting posts  23  in turn so that the first pulley  3  is loaded into the mounting groove  201 , and the second pulley  4  abuts against outside of the mounting groove  201 ; and the inner liner  24  is arranged on another side of the second pulley  4  and is fixed with the first mounting posts  23  through fasteners  25 , so that the first pulley  3  and the second pulley  4  are limited between the mounting portion  22  and the inner liner  24 . In this embodiment, the first pulley  3  is located in the mounting groove  201 , and the second pulley  4  is located outside the mounting groove  201 , and the first pulley  3  is limited by the second pulley  4 , which can prevent the first pulley  3  from sliding out of the mounting groove  201 , and avoid the first pulley  3  from shaking right and left or even tilting; the second pulley  4  is located outside the mounting groove  201  and abuts against the mounting portion  22 , and the inner liner  24  is mounted on another side of the second pulley  4 , that is, the second pulley  4  is limited by the inner liner  24  and the mounting portion  22 , which can prevent the second pulley  4  from shaking right and left or even tilting. With stable mounting of the first pulley  3  and the second pulley  4  in the structure of this embodiment, it can be ensured that no inclining occurs after multiple uses and service life of products can be prolonged. The fastener  25  may be a grub screw. 
     The mounting groove  201  is provided at a joint of the handle portion  21  and the mounting portion  22 . Structural strength of the joint between the handle portion  21  and the mounting portion  22  is high, and the mounting groove  201  does not affect overall structural stability of the slider  2  after being provided here, which can ensure mounting stability of the first pulley  3  and the second pulley  4 . 
     The slider  2  further includes a second mounting post  26  provided on the mounting portion  22 , the second mounting post  26  is located on a same line as the first mounting post  23 , the second pulley  4  is sleeved on the second mounting post  26 , and the inner liner  24  is fixed with the second mounting post  26  through the fasteners  25 , thereby limiting the second pulley  4  between the mounting portion  22  and the inner liner  24 . The first pulleys  3  and the second pulleys  4  are both at least two in number, and with a straight line being determined with two points, it thus can be ensured that an upper end and an lower end of the slider  2  do not tilt, thus further ensuring smooth moving of the slider  2 . In this embodiment, there are three first pulleys  3  and four second pulleys  4 , and three second pulleys  4  are mounted on the first mounting post  23  together with the first pulleys  3 , and the remaining second pulley  4  is mounted on the second mounting post  26 . In this way, the first pulleys  3  and the second pulleys  4  can arranged to better disperse a force borne by the slider  2 , so that a pressure at each application point (where the first pulley  3  or the second pulley  4  contacts the post  1 ) is smaller, so that the slider  2  can support more pressure. However, it is not limited to this, and other number and distribution of the first pulley  3  and the second pulley  4  also is possible, which is not limited in the disclosure. 
     A free end of the fixing part  51  faces the bottom wall of the first track groove  101 , and the free end of the fixing part  51  is provided with a latch  511  for cooperating with the bottom wall of the first track groove  101  to fix the fixing piece  5  on the post  1 . The fixing part  51  is moved toward the bottom wall of the first track groove  101  by cooperation of the latch  511  with the bottom wall of the first track groove  101  so that the latch  511  closely abuts against the bottom wall of the first track groove  101 , and then the slider  2  can be fixed on the post  1 . 
     The bottom wall of the first track groove  101  protrudes toward the fixing piece  5  to form an arc-shaped protrusion  111 , an end face of the free end of the fixing part  51  is arranged in an arc shape, corresponding to the arc-shaped protrusion  111 , and the latch  511  is formed on the end face of the free end of the fixing part  51 . The end face of the free end of the fixing part  51  is arranged in an arc shape and has a larger contact area with the arc-shaped protrusion  111 , so that the latch  511  can better lock the arc-shaped protrusion  111  and fix the slider  2  on the post  1 . 
     The fixing piece  5  also includes a knob  52  and a connecting screw  53 , and the fixing part  51  movably passes through the slider  2  which limits rotation of the fixing part  51 . A threaded hole  510  is provided in the fixing part  51 , and the knob  52  is arranged at a rear end of the fixing part  5 , and the connecting screw  53  passes through the knob  52  and is inserted into the threaded hole  510 , thereby connecting the knob  52  and the fixing part  51 , so that the fixing part  51  can be driven to move by turning the knob  52  so as to approach or move away from the bottom wall of the first track groove  101 . 
     When the knob  52  is turned, the knob  52  rotates with the connecting screw  53  and the fixing part  51 . Since the slider  2  limits rotation of the fixing part  51 , the fixing part  51  can only move along a length direction of the screw, so as to approach or move away from the bottom wall of the first track groove  101  of the post  1 . By tightening the knob  52 , the fixing part  51  can closely abut against the bottom wall of the first track groove  101 , thereby locking and fixing the slider  2  on the post  1 ; and by unscrewing the knob  52 , the fixing part  51  can be separated from the bottom wall of the first track groove  101 , so that the slider  2  can be moved to any position on the post  1 , and this operation process is very convenient. 
     Further, a knob cover  54  is provided outside the knob  52  to cover the connecting screw  53 , so as to provide an aesthetic appearance. 
     The disclosure has following beneficial effects: in the umbrella sliding assembly of the disclosure, only rolling friction exists between the first pulley  3 , the second pulley  4  and the post  1  during moving of the slider  2 , which presents a small friction force; and with the provision of the first pulley  3  and the second pulley  4 , the slider  2  does not tilt during the moving, and in this way wear on the post  1  can be reduced, and the slider  2  moves smoothly without jamming. 
     The above is only preferred embodiments of the present disclosure, which does not limit a protection scope of the present disclosure. Any equivalent structural transformation made with the specification and drawings of the present disclosure, which is directly or indirectly applied to other related technical fields, is included within the scope of the disclosure.