Patent Publication Number: US-10760773-B2

Title: Focus-adjustable lamp

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     The present application claims the priority of Chinese Patent Application No. 201711195058.6, filed on Nov. 24, 2017, and entitled “Focus-adjustable Lamp,” the content of which is incorporated herein by reference in its entirety. 
     BACKGROUND 
     Technical Field 
     The present invention relates to a focus-adjustable lamp, and in particular to a focus-adjustable lamp capable of changing the size of a light spot. 
     Description of the Related Art 
     There are small roads in parks and gardens, and there are often shorter path lights along the roads to illuminate the roads. However, the current path lights have a fixed illuminated spot size that cannot be adjusted as needed, thereby causing inconvenience in the use process. 
     In view of this, it is necessary to provide an improved focus-adjustable lamp to overcome the above problems. 
     BRIEF SUMMARY 
     An objective according to the present invention is to provide a focus-adjustable lamp capable of changing the size of a light spot. 
     In order to realize the above objective according to the present invention, the present invention provides a focus-adjustable lamp, provided with an illuminating mechanism on the top end thereof. The illuminating mechanism comprises a light-emitting element, a shield body shielding the outer side of the light-emitting element, a heat dissipating member closely matched with the light-emitting element, and a cover body located on the top end of the illuminating mechanism. The illuminating mechanism is further provided with a light-converging cylinder rotationally sleeving the outer side of the shield body. The light-converging cylinder is capable of rotating back and forth along a circumferential direction of the shield body to adjust the size of a light spot projected by the light-emitting element on the ground, the shield body is a lens having an outer wall rotationally matched with the light-converging cylinder and an inner wall fixedly matched with the heat dissipating member and the light-emitting element. 
     As a further improvement on the present invention, the shield body has a bottom wall. The outer wall is formed by extending upwardly from an outer side edge of the bottom wall. The inner wall is formed by extending upwardly from an inner side edge of the bottom wall. The light-emitting element is located in a spaced region between the inner wall and the outer wall. 
     As a further improvement on the present invention, the inner wall and the outer wall extend coaxially in the same direction. The upwardly-extending height of the inner wall is greater than the upwardly-extending height of the outer wall. 
     As a further improvement on the present invention, the outer wall is provided with a plurality of buckling parts protruding toward the direction of a central axis of the illuminating mechanism. The buckling parts are hooked in a fastening groove disposed in the outer side of the heat dissipating member. 
     As a further improvement on the present invention, the outer wall is further provided with a plurality of intermittently arranged threaded parts. The threaded parts and the buckling parts are alternately arranged in a circumferential direction of the outer wall. 
     As a further improvement on the present invention, the outer wall is provided with a plurality of uniformly-distributed buckling arms located on the top end thereof. The buckling parts are formed on the top ends of the buckling arms. 
     As a further improvement on the present invention, the inner wall has a pair of elastic arms extending upwardly and disposed oppositely. Each elastic arm protrudes toward each other to form a limiting part. The heat dissipating member is provided with a horizontally-disposed intermediate wall. The limiting part upwardly passes over the intermediate wall and is supported and limited on the upper surface of the intermediate wall. 
     As a further improvement on the present invention, the elastic arms extend upwardly and penetrate through the corresponding notches of the light-emitting element, and are inserted into corresponding fixing grooves of the heat dissipating member. 
     As a further improvement on the present invention, the cover body is assembled above the heat dissipating member and is provided with a positioning column downwardly protruding and fixed in a mounting hole disposed in the heat dissipating member. 
     In order to realize the above objective according to the present invention, the present invention also provides a focus-adjustable lamp comprising an illuminating mechanism on the top end thereof and a mounting mechanism located on the bottom end thereof. The illuminating mechanism includes a light-emitting element, a shield body shielding the outer side of the light-emitting element, a heat dissipating member closely matched with the light-emitting element and a cover body located on the top end of the illuminating mechanism. The mounting mechanism defines an insertion part inserted downwardly into the ground. The illuminating mechanism further comprises a light-converging cylinder enclosing on the periphery of the shield body, by adjusting the relative position of the light-converging cylinder relative to the shield body in an axial direction, a light spot projected by the light-emitting element on the ground has different sizes. 
     As a further improvement on the present invention, the shield body is a lens having an outer wall movably matched with the light-converging cylinder and an inner wall unmovably matched with the heat dissipating member and the light-emitting element. 
     As a further improvement on the present invention, the focus-adjustable lamp further comprises a support rod connecting the illuminating mechanism to the mounting mechanism, and a top end of the support rod is connected and fixed to the illuminating mechanism, and the bottom end of the support rod is connected and fixed with the mounting mechanism. 
     As a further improvement on the present invention, the shield body has a bottom wall, both of the outer wall and the inner wall are formed by extending upwardly from the bottom wall, the inner wall and the outer wall extend coaxially in the same direction, and spaced apart from each other, the light-emitting element is located in a spaced region between the inner wall and the outer wall. 
     The light-converging cylinder of the focus-adjustable lamp according to the present invention can rotationally sleeve the outer side of the shield body. The user can effectively and precisely adjust the size of the light spot projected on the ground according to an operational environment. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG. 1  is a perspective assembled view of a focus-adjustable lamp in a preferred embodiment according to the present invention. 
         FIG. 2  is a partial exploded view of the focus-adjustable lamp shown in  FIG. 1 . 
         FIG. 3  is a partial exploded view of an illuminating mechanism in the focus-adjustable lamp shown in  FIG. 2 . 
         FIG. 4  is a perspective view of a shield body in the illuminating mechanism shown in  FIG. 3 . 
         FIG. 5  is a perspective view of a heat dissipating member in the illuminating mechanism shown in  FIG. 3 . 
         FIG. 6  is a perspective view of a cover body in the illuminating mechanism shown in  FIG. 3 . 
         FIG. 7  is a partial assembled view of the illuminating mechanism shown in  FIG. 3  after a top cover is removed. 
         FIG. 8  is a perspective assembled view of the illuminating mechanism shown in  FIG. 3 . 
         FIG. 9  is a cross-sectional schematic view of the illuminating mechanism shown in  FIG. 8 . 
         FIG. 10  is a schematic adjusting view of the focus-adjustable lamp shown in FIG. 
         FIG. 11  is an exploded schematic view of the focus-adjustable lamp shown in  FIG. 1  after wiring. 
         FIGS. 12 to 13  are perspective views of other two embodiments of the cover body in the illuminating mechanism shown in  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION 
     In order to make the objects, technical solutions, and advantages according to the present invention clearer, the present invention will be described in detail below with reference to the specific embodiments and drawings. 
       FIG. 1  to  FIG. 11  show a preferred embodiment of a focus-adjustable lamp  100  according to the present invention. The focus-adjustable lamp  100  according to the present invention comprises an illuminating mechanism  1  on the top end thereof, a mounting mechanism  2  located on the bottom end thereof, and a support rod  3  connecting the illuminating mechanism  1  to the mounting mechanism  2 . 
     Referring to  FIG. 3  to  FIG. 11 , the illuminating mechanism  1  comprises a light-emitting element  11 , a shield body  12  shielding the outer side of the light-emitting element  11 , a heat dissipating member  13  closely matched with the light-emitting element  11 , a light-converging cylinder  14  rotationally sleeving the outer side of the shield body  12  and a cover body  15  located on the top end of the illuminating mechanism  1 . The cover body  15  is assembled above the heat dissipating member  13 . 
     Referring to  FIG. 3 ,  FIG. 9  and  FIG. 11 , in the present embodiment, the light-emitting element  11  is an annular lamp panel, the lower surface of which is provided with at least one LED lamp. In the present embodiment, a plurality of LED lamps  112  and a plurality of positioning holes  113  are uniformly distributed in the lower surface of the light-emitting element  11 . The central position of the light-emitting element  11  is provided with a receiving hole  114  penetrating therethrough along the thickness direction thereof. The light-emitting element  11  is further provided with a pair of notches  115  communicated with the receiving hole  114 . The pair of notches  115  is disposed opposite to each other in the radial direction. 
     Referring to  FIG. 3 ,  FIG. 4  and  FIG. 9 , the shield body  12  is a lens. In the present embodiment, the shield body  12  is made of plastic material and has a round outer contour. The shield body  12  has a bottom wall  121 , an outer wall  122  formed by extending upwardly from the outer edge of the bottom wall  121 , and an inner wall  123  located inside the outer wall  122 . The bottom wall  121  is annular. The inner wall  123  extends upwardly from the inner side edge of the bottom wall  121 . The inner wall  123  and the outer wall  122  coaxially extend in the same direction. The upwardly-extending height of the inner wall  123  is greater than the upwardly-extending height of the outer wall  122 . 
     The outer wall  122  has a plurality of uniformly-distributed buckling arms  1221  located on the top end thereof and buckling parts  1223  formed on the top ends of the buckling arms  1221 . The buckling parts  1223  are located on the free tail ends of the buckling arms  1221  and protrude toward the central axis of the shield body  12 . The outer wall  122  is further provided with a plurality of intermittently arranged threaded parts  1224 . The threaded parts  1224  and the buckling arms  1221  (or the buckling parts  1223 ) are alternately disposed in the circumferential direction of the outer wall  122 . 
     The inner wall  123  has an annular base body  1231  and a pair of elastic arms  1232  formed by extending upwardly from the top end of the base body  1231 . The pair of elastic arms  1232  is oppositely disposed. Each elastic arm  1232  is provided with a limiting part  1233  facing the other elastic arm  1232 . The pair of limiting parts  1233  protrudes toward each other. Each limiting part  1233  has a guiding surface  1234  disposed obliquely and a limiting surface  1235  located below the guiding surface  1234 . The guiding surface  1234  extends downwardly and obliquely toward a central axis direction of the shield body  12 . 
     Referring to  FIG. 3 ,  FIG. 5 ,  FIG. 7  and  FIG. 9 , the heat dissipating member  13  has a horizontally-disposed intermediate wall  131 , a tubular extending part  132  protruding upwardly from the intermediate wall  131 , and a protruding column  133  extending downwardly from the middle part of the intermediate wall  131 . The heat dissipating member  13  is further provided with a receiving passage  134  penetrating through both the intermediate wall  131  and the protruding column  133  along a height direction of the dissipating member  13 . The receiving passage  134  is located in the central position of the heat dissipating member  13 . 
     A pair of fixing grooves  1311  disposed at an interval penetrates through the intermediate wall  131  along the thickness direction of the intermediate wall  131 . The pair of fixing grooves  1311  is disposed in a radial direction and in both sides of the receiving passage  134  symmetrically. The fixing grooves  1311  are disposed by corresponding to the notches  115 . 
     The extending part  132  is cylindrical, and is recessed from the outer surface thereof toward the central axis to form an annular fastening groove  1321 . The size of the fastening groove  1321  along the height direction thereof is always consistent. A plurality of bosses  1322  protruding upwardly from an upper surface of the intermediate wall  131  is formed in a receiving cavity of the extending part  132 . The boss  1322  has a mounting hole  1323  recessed downwardly. A part of the upper surface of the boss  1322  is flush with the annular upper surface of the extending part  132 , and is provided with the mounting hole  1323  penetrating therethrough along the height direction thereof and a convex reinforcing rib  1324  facing the central axis. In addition, the through mounting hole  1323  has an upper section having a larger inner diameter and a lower section having a smaller inner diameter. The upper surface of the other part of the boss  1322  is lower than the annular upper surface of the extending part  132 , and serves as a supporting surface to provide a supporting force for a circuit board  16  of the focus-adjustable lamp  100 . 
     Referring to  FIG. 3  and  FIG. 7  to  FIG. 9 , the light-converging cylinder  14  is a cylindrical structure having internal threads, and sleeves the outer side of the shield body  12  and the heat dissipating member  13  to completely shield the components therein and to collect and converge the light emitted by the light-emitting element  11 . In the present embodiment, the internal threads of the light-converging cylinder  14  are spirally wound from the top end to the bottom end of the inner wall surface thereof. 
     Referring to  FIG. 6 , the cover body  15  is provided with a top cover  151 , an annular protruding part  152  located on the bottom of the top cover  151 , and a pair of positioning columns  153 . The downwardly-extending length of the positioning columns  153  is greater than the downwardly-extending length of the protruding part  152 . The top cover body  151  has an upwardly-arched umbrella-like structure. In the present embodiment, the top surface of the top cover is a spherical surface. The protruding part  152  and the positioning columns  153  are disposed in a concave area on the inner side of the top cover. The positioning columns  153  are symmetrically disposed and a connecting line thereof passes by the center of the top cover  151 . 
     The cover body  15  is further provided with a pair of inner convex parts  154  and a plurality of outer convex parts  155  located on the bottom of the top cover  151 . The inner convex parts  154  and the positioning columns  153  are both located inside the protruding part  152  and are arranged alternately. The outer convex parts  155  are evenly distributed on the outer side of the protruding part  152 , and the inner convex parts  154  protrude from the inner wall surface of the protruding part  152  toward a direction of the central axis. The outer convex parts  155  are formed by protruding outwardly from an outer circumferential surface of the protruding part  152  toward a direction away from the central axis. 
     Referring to  FIG. 3  and  FIG. 11 , the focus-adjustable lamp  100  is further provided with a wire buckle  17  for fixing a cable  4 . In the present embodiment, the wire buckle  17  is shaped like a flat plate and is provided with a pair of through holes  171 , through which the cable  4  penetrates, in a penetrating manner along the thickness direction of the wire buckle  17 . 
     The external cable  4  is electrically connected to the circuit board  16 , the light-emitting element  11  and an external power supply unit of the focus-adjustable lamp  100  to supply power to the focus-adjustable lamp  100 . When being assembled, the circuit board  16  is placed on the upper surface of the corresponding boss  1322 . The wire buckle  17  is located on the lower side of the circuit board  16 . Threaded fasteners are inserted into the corresponding mounting holes  1323  from top to bottom to fix the circuit board  16  in the receiving cavity of the heat dissipating member  13 . The light-emitting element  11  is closely attached to the lower surface of the intermediate wall  131  by the plurality of threaded fasteners to facilitate the conduction of generated heat. 
     The shield body  12  sleeves the outer side of the lower part of the extending part  132  of the heat dissipating member  13 . The inner wall  123  is fixedly matched with the heat dissipating member  13  and the light-emitting element  11 . The light-emitting element  11  is located in a spaced area between the inner wall  123  and the outer wall  122 . The buckling part  1223  protrudes toward the direction of the central axis and is hooked in the fastening groove  1321 . The elastic arms  1232  of the shield body  12  extend upwardly and penetrate through the notches  115  of the light-emitting element  11 , and are inserted into the fixing grooves  1311  of the heat dissipating member  13 , thereby preventing relative rotation between the shield body  12  and the heat dissipating member  13 . The limiting parts  1233  of the shield body  12  pass over the intermediate wall  131  under the guidance of the guiding surfaces  1234 , and the limiting surfaces  1235  are supported and limited on the upper surface of the intermediate wall  131 . 
     The light-converging cylinder  14  rotationally sleeves the outer side of the shield body  12 , and accommodates the shield body  12  and the heat dissipating member  13  therein. The cover body  15  is assembled on the upper side of the heat dissipating member  13  from top to bottom. The upper surface of the heat dissipating member  13  is abutted against the lower surface of the protruding part  152  of the cover body  15 . The positioning columns  153  are inserted downwardly into the corresponding mounting holes  1323  and are matched with the same in an interfering manner. Thus, the heat dissipating member  13  is assembled and positioned with the cover body  15 . The protruding column  133  is inserted downwardly into the top end of the support rod  3 . The detachable connection and the fastening cooperation between the heat dissipating member  13  and the support rod  3  are realized by the threads disposed on the outer side of the protruding column  133 . 
     Referring to  FIG. 9  and  FIG. 10 , the light-converging cylinder  14  can be rotated back and forth along the circumferential direction of the shield body  12  (in the direction as shown in  FIG. 10 ) to adjust the size of the light spot projected on the ground by the light-emitting element  11 . When the light-converging cylinder  14  is rotated to the moment that the upper surface thereof is abutted against the bottom surface of the protruding part  152  on the lower side of the cover body  15 , the size of the light spot projected by the lamp  100  becomes minimum. When the light-converging cylinder  14  is rotated downward, the light spot projected by the lamp  100  gradually becomes larger, so that the size of the light spot of the lamp  100  can be continuously adjusted by the rotation of the light-converging cylinder  14 . In addition, the adjustment is more precise compared with the conventional pulling adjustment on the light spot. 
     In the present embodiment, since the support rod  3  can be tightly matched with the heat dissipating member  13 , and the heat dissipating member  13  is fixedly connected to the shield body  12  without relative rotation, the rotation adjustment of the light-converging cylinder  14  relative to the shield body  12  may also be realized by rotating the support rod  3 . In addition, since the cover body  3  can be fixedly matched with the heat dissipating member  13  in an interfering manner, the rotation adjustment of the light-converging cylinder  14  relative to the shield body  12  may also be realized by rotating the cover body  3 . 
       FIG. 12  to  FIG. 13  show other two embodiments of the cover body in the focus-adjustable lamp  100  according to the present invention. The basic structure of the cover body  15 ′ shown in  FIG. 11  and the cover body  15 ″ shown in  FIG. 12  is the same as the basic structure of the cover body  15  in the previous embodiment. The difference is only the shape of the top covers  151 ′ and  151 ″. The top cover  151 ′ has a conical shape, and the top cover  151 ″ is shaped like a straw hat. Other same structures will not be described here. 
     Referring to  FIG. 1 ,  FIG. 2  and  FIG. 8 , in the present embodiment, the mounting mechanism  2  and the support rod  3  are two structures independent from each other, so as to achieve detachable connection therebetween. In other embodiments, the mounting mechanism  2  may also be directly and integrally disposed on the bottom end of the support rod  3 . 
     The mounting mechanism  2  is an insertion-type structure and is provided with an insertion part  21  on the bottom end thereof and a joint part  22  on the upper side thereof. The joint part  22  is connected to the support rod  3 . The insertion part  21  is gradually tapered downwardly from the upper end thereof so as to be inserted downwardly into the ground. 
     The bottom end of the support rod  3  is inserted into and located in an insertion space (not shown) in the joint part  22 . In the present embodiment, the inner wall of the joint part  22  has internal threads matched with the support rod  3 . One side of the joint part  22  is recessed from the outer surface thereof toward the central axis thereof to form an opening  221  extending in the height direction. The opening  221  is open to the outside and communicates with the insertion space in the joint part  22 . The joint part  22  is further provided with a wire-wrap board  223  located in the insertion space to allow the cable  4  to penetrate out from the lower side of the wire-wrap board  223 . 
     The support rod  3  is a hollow rod-like structure and has two opposite ends, i.e., the top end and the bottom end, disposed in the height direction thereof, wherein one end (the top end) is connected and fixed to the illuminating mechanism  1 , and the other end (the bottom end) is connected and fixed with the mounting mechanism  2 . In order to reinforce the matching connection with the mounting mechanism  2 , the support rod  3  is provided with a connecting part  31  matched with the joint part  22 . In the present embodiment, the connecting part  31  is a threaded structure. In other embodiments, the connecting part  31  may also be a buckling-type structure. 
     When in use, the cable  4  is mechanically and electrically connected to the circuit board  16 , penetrates through the wire buckle  17 , downwardly penetrates through the receiving passage  134 , then enters the tubular space of the support rod  3 , and penetrates out from the side part of the mounting mechanism  2  on the lower end of the support rod  3 , to be conveniently connected to the external power supply unit. 
     The above embodiments are only intended for illustrating rather than limiting the technical solutions according to the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those ordinary skilled in the art that the technical solutions according to the present invention can be modified or equivalently substituted without departing from the spirit and scope of the technical solutions.