Abstract:
A telescopic limiting structure includes a first retractable member, including a first inclined face and a second retractable member including a second inclined face bearing against the first inclined face. The first retractable member is configured to move along a first direction. The first inclined face and the second inclined face are configured to drive the second retractable member to move along a second direction in response to the first retractable member moving along the first direction. The second direction is different from the first direction.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This is a continuation application of International Application No. PCT/CN2014/089215, filed on Oct. 22, 2014, the entire contents of which are incorporated herein by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    The present disclosure relates to a telescopic limiting structure, and relates to a camera body and a camera having the telescopic limiting structure. 
       BACKGROUND OF THE DISCLOSURE 
       [0003]    A single lens camera comprises a lens and a camera body. The lens and the camera body are detachable and replaceable. In order to prevent the detachable lens from falling off and inaccurate positioning of electric circuit contacts, it is necessary to design a telescopic limiting structure that can extend and retract. A traditional solution of the telescopic limiting structure is to rotatably mount a lens on a camera assembling ring, use the assembling ring to hook the lens, and then insert a movable boss in the lens-release limiting structure into a lens groove, so as to achieve the purpose of preventing the lens from falling off due to free rotation in use. 
         [0004]    However, the pressing method for a traditional lens-release press key block is performed along the axial direction of the lens, which should be no problem for ordinary cameras but is just neither convenient nor user-friendly, and is especially inconvenient for detaching the lens when the camera is applied to a mobile platform. 
       SUMMARY OF THE DISCLOSURE 
       [0005]    The main technical problem to be solved by the embodiments of the present disclosure is to provide a telescopic limiting structure that can prevent an object to be limited from rotating and deviating and eventually falling off, while optimizing the detachment and attachment of the object, such as facilitating mounting and dismounting of a lens. 
         [0006]    Another main technical problem to be solved by the embodiments of the present disclosure is to provide a camera body having the telescopic limiting structure that can prevent a lens from rotating and deviating and eventually falling of while facilitating detachment and attachment of the lens. 
         [0007]    Another main technical problem to be solved by the embodiments of the present disclosure is to provide a camera having the telescopic limiting structure and comprising a lens and a camera body. 
         [0008]    In one aspect, the embodiments of the present disclosure provide a telescopic limiting structure, comprising: 
         [0009]    a first-direction retractable member, wherein the first-direction retractable member is provided with a first inclined face; and 
         [0010]    a second-direction retractable member, wherein the second-direction retractable member is provided with a second inclined face, the first inclined face bears against the second inclined face so as to drive the second-direction retractable member to extend or retract along a second direction when the first-direction retractable member extends or retracts along a first direction, and a limiting structure is formed when the second-direction retractable member extends. 
         [0011]    Furthermore, the first direction is substantially perpendicular to the second direction. 
         [0012]    Furthermore, the first-direction retractable member comprises a press key and a first elastic element. The second-direction retractable member comprises a limiting boss and a second elastic element. The first elastic element is arranged between the press key and the limiting boss along the first direction, and the second elastic element is arranged along the second direction and is connected to the limiting boss. 
         [0013]    Furthermore, the limiting boss comprises a bracket and a post and a shaft protruding from the bracket. The post forms the limiting structure, and the second elastic element is sheathed on the shaft. 
         [0014]    Furthermore, the bracket is in a bent shape and comprises a first supporting part and a second supporting part. The post and the shaft extend perpendicularly from two opposite surfaces of the first supporting part, and the post and the shaft are parallel to the second supporting part, and the first elastic element is arranged between the press key and the second supporting part along the first direction. 
         [0015]    Furthermore, two sides of a section of the second supporting part are inwardly provided with a limiting part respectively. Each of the limiting parts is provided with an upper boss and a lower boss arranged oppositely. The two limiting parts have a common intermediate supporting part. The second inclined faces are respectively provided at surfaces of the two lower bosses. The press key comprises a press key block and two snapping parts extending from the press key block. The first elastic element is arranged between the press key block and the intermediate supporting part along the first direction, and the first inclined faces are respectively formed at the two snapping parts. 
         [0016]    Furthermore, a press key bracket is further included, wherein the press key bracket comprises a body and two claws extending from the body, each one of the snapping parts is provided with a protruding block facing away from the other one of the snapping parts, the protruding block is provided with a snapping face facing towards the press key block, and the claw snaps with the snapping face so as to restrict the release of the press key from the press key bracket when the press key extends or retracts along the first direction. 
         [0017]    In another aspect, the embodiments of the present disclosure provide a camera body comprising a fixing frame, wherein the fixing frame is provided with a lens assembling opening for assembling a lens, and the fixing frame is further provided with a telescopic limiting structure, wherein the telescopic limiting structure comprises: 
         [0018]    a first-direction retractable member, wherein an outer side wall of the fixing frame is inwardly provided with a first assembling hole, the first-direction retractable member extends into the fixing frame from the first assembling hole, and the first-direction retractable member is provided with a first inclined face; and 
         [0019]    a second-direction retractable member, wherein the fixing frame is inwardly provided with a second assembling hole at an end of the lens assembling opening, the second-direction retractable member extends into the fixing frame from the second assembling hole, the second-direction retractable member is provided with a second inclined face, the first inclined face bears against the second inclined face so as to drive the second-direction retractable member to extend or retract along a second direction when the first-direction retractable member extends or retracts along a first direction, and a limiting structure for restricting the lens is formed when the second-direction retractable member extends. 
         [0020]    Furthermore, the inner wall of the lens assembling opening is provided with a lens assembling ring, and the inner wall of the lens assembling ring is provided with a rib for overlapping and snapping with a flange on the outer side of the lens. 
         [0021]    In yet another aspect, the embodiments of the present disclosure provide a camera comprising the camera body as mentioned above and a lens detachably connected to the camera body, wherein the lens is detachably connected to the camera body at the lens assembling opening of the fixing frame, and is telescopically limited by the telescopic limiting structure. 
         [0022]    The lens is provided with a lens cone. The lens cone is provided with a protruding assembling part. The outer side wall of the assembling part is provided with a flange. The lens assembling opening, is provided with a lens assembling ring. The inner wall of the lens assembling ring is provided with a rib, and the flange overlaps and snaps with the rib via rotation after the lens is assembled into the lens assembling ring. 
         [0023]    One end of the lens cone is also inwardly provided with a hole. The limiting structure is provided with a post, and the post is used for protruding into the hole for limiting. 
         [0024]    The first-direction retractable member of the telescopic limiting structure in the embodiments of the present disclosure drives the second-direction retractable member to move via inclined face fitting. For example, when the camera is held by one hand in the second direction of the camera, the lens can be easily and steadily pressed by a finger, and the retractable member can be released by the other hand in the first direction, avoiding interference of operations in the same direction. The camera body and the camera in the embodiments of the present disclosure can prevent the lens from rotating and deviating and eventually falling off, while facilitating detachment and attachment of the lens and smoother usage thereof. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1  is a schematic perspective view of a telescopic limiting structure provided in the embodiments of the present disclosure; 
           [0026]      FIG. 2  is a schematic exploded view of the telescopic limiting structure as shown in  FIG. 1 ; 
           [0027]      FIG. 3  is a schematic, partially exploded and perspective view of a camera body provided in the embodiments of the present disclosure; 
           [0028]      FIG. 4  is a sectional view of the camera body as shown in  FIG. 3 ; 
           [0029]      FIG. 5  is a schematic perspective view of the separation of a lens and the camera body provided in the embodiments of the present disclosure; and 
           [0030]      FIG. 6  is a sectional view of the lens and the camera body as shown in  FIG. 5  after assembly. 
       
    
    
     DESCRIPTION OF REFERENCE SIGNS OF MAIN ELEMENTS 
       [0031]      
         [0000]    
       
         
               
               
               
             
           
               
                   
                 TABLE I 
               
               
                   
                   
               
             
             
               
                   
                 Telescopic limiting structure 
                 100 
               
               
                   
                 Press key 
                  10 
               
               
                   
                 Press key bracket 
                  20 
               
               
                   
                 Limiting boss 
                  30 
               
               
                   
                 First elastic element 
                  40 
               
               
                   
                 Second elastic element 
                  50 
               
               
                   
                 Press key block 
                  12 
               
               
                   
                 Snapping part 
                  14 
               
               
                   
                 End face 
                 121 
               
               
                   
                 First inclined face 
                 142 
               
               
                   
                 Upper surface 
                 143 
               
               
                   
                 Protruding block 
                 144 
               
               
                   
                 Snapping face 
                 145 
               
               
                   
                 Body 
                  21 
               
               
                   
                 Claw 
                  22 
               
               
                   
                 Post 
                  31 
               
               
                   
                 Bracket 
                  32 
               
               
                   
                 Shaft 
                  33 
               
               
                   
                 First supporting part 
                 321 
               
               
                   
                 Second supporting part 
                 322 
               
               
                   
                 Limiting part 
                 323 
               
               
                   
                 Intermediate supporting part 
                 323a 
               
               
                   
                 Upper boss 
                 323b 
               
               
                   
                 Lower boss 
                 323c 
               
               
                   
                 Second inclined face 
                 323f 
               
               
                   
                 Camera body 
                 200 
               
               
                   
                 Fixing frame 
                 210 
               
               
                   
                 Lens assembling ring 
                 230 
               
               
                   
                 Locating hole 
                 230a 
               
               
                   
                 Rib 
                 232 
               
               
                   
                 Sliding groove 
                 234 
               
               
                   
                 First assembling hole 
                 214 
               
               
                   
                 Second assembling hole 
                 212 
               
               
                   
                 Post body 
                 216 
               
               
                   
                 Stepped face 
                 217 
               
               
                   
                 Guiding hole 
                 218 
               
               
                   
                 Camera 
                 300 
               
               
                   
                 Lens 
                 350 
               
               
                   
                 Lens cone 
                 370 
               
               
                   
                 Flange 
                 372 
               
               
                   
                 Assembling part 
                 374 
               
               
                   
                 Hole 
                 376 
               
               
                   
                   
               
             
          
         
       
     
         [0032]    Exemplary embodiments will be described below in connection with the above-mentioned drawings. 
       DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0033]    The technical solutions in the embodiments of the present disclosure are hereinafter described with reference to the accompanying drawings. The described embodiments are only some rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure. 
         [0034]    A telescopic limiting structure provided in the embodiments of the present disclosure can be mounted into an object and fitted with another object, so as to prevent the rotation and detaching of the another object. The objects can be but are not limited to the camera body and the lens of a camera. For example, the telescopic limiting structure can he used for mounting into the camera body and fitting with the lens, which can prevent the lens from rotating and eventually falling off and can facilitate detachment and attachment of the lens. The camera can be an ordinary camera with a detachable lens, a single lens camera with relatively good imaging quality, or a camera for special use, such as an aerial camera used on an unmanned aerial vehicle. 
         [0035]    Specifically, with reference to  FIG. 1  and  FIG. 2 , a telescopic limiting structure  100  comprises a press key  10 , a press key bracket  20 , a limiting boss  30 , a first elastic element  40 , and, a second elastic element  50 . A camera body is taken as the object to which the telescopic limiting structure  100  is mounted and a lens is taken as the object to be limited for specific illustration of the various components and the usage thereof. 
         [0036]    The press key  10  is movably disposed on a side edge of the camera body. The press key  10  comprises a press key block  12  and two snapping parts  14  extending from the press key block  12 . The two snapping parts  14  extend from a same end face  121  of the press key block  12 , and a spacing is provided therebetween. Each of the snapping parts  14  is provided with a first inclined face  142 , and in the present embodiment, the first inclined face  142  inclines from the end face  121  of the press key block  12  in the direction away from the end face  121 . That is, the width of each of the snapping parts  14  in the direction parallel to the end face  121  gradually decreases from the end face  121  in the direction away from the end face  121 . In the present embodiment, each of the snapping parts  14  is a right-angled triangle. The snapping part  14  comprises an upper surface  143  opposite the first inclined face  142 , and the upper surface  143  is a planar surface. The end part of each of the snapping parts  14  is provided with a protruding block  144 . The protruding block  144  is located on a side face of the snapping part  14  facing away from the other snapping part  14  and is arranged at an end of the snapping part  14  away from the end face  121 , and the protruding block  144  is provided with a snapping face  145  facing toward the end face  121 . In the present embodiment, the snapping face  145  is a planar surface. 
         [0037]    The press key bracket  20  is used for fixing in the camera body, and has the function of snapping with the press key  10  so as to prevent the press key  10  from being released from the camera body. The press key bracket  20  has a body  21  and two claws  22  extending from the body  21 , and the two claws  22  have a spacing therebetween and are substantially perpendicular to the main surface of the body  21 . Each claw  22  is used to snap with the snapping face  145  of the press key  10 . 
         [0038]    The limiting boss  30  is movably disposed in the camera body of the camera, and has a post  31  that protrudes from the end face of the camera body facing towards the lens of the camera and that is embedded into the lens cone of the lens. The limiting boss  30  further comprises a bracket  32  and a shaft  33 . The bracket  32  is in a bent shape, and has a first supporting part  321  and a second supporting part  322  arranged substantially perpendicularly. A post  31  perpendicularly extends from one side of the first supporting part  321 , a shaft  33  perpendicularly extends from the other side thereof, and the post  31  and the shaft  33  are parallel to the second supporting part  322 . The second supporting part  322  is inwardly cut out respectively on two sides of an approximately middle position, and limiting parts  323  are formed on the two sides. The limiting parts  323  on the two sides are provided with an intermediate supporting part  323   a  connecting two ends of the second supporting part  322 , and due to the cut-outs, each limiting part  323  forms an upper boss  323   b  and a lower boss  323   c  protruding relative to the intermediate supporting part  323   a . The lower boss  323   c  is provided with a second inclined face  323   f.    
         [0039]    The first elastic element  40  is arranged between two snapping parts  14  of the press key  10  and abuts between the end face  121  and the intermediate supporting part  323   a , and the intermediate supporting part  323   a  of the limiting boss  30  is accommodated between the two snapping parts  14 . The beveled first inclined faces  142  of the two snapping parts  14  abut against the second inclined faces  323   f  of the lower boss  323   c  of the limiting boss  30 . The claws  22  of the press key bracket  20  snap with the snapping faces  145  of the press key  10 . The second elastic element  50  is sheathed on the shall  33  of the limiting boss  30  One end of the second elastic element  50  abuts against one side of the first supporting part  321 , and the other end is used to abut against an inner wall of a hole formed in the camera body. When a user presses the press key  10 , a force acting alone the beveled first inclined face  142  can be resolved into a propelling three perpendicular to the end face  121  of the press key  10  and a downward force pressing the second inclined face  323   f  downwards. The downward force enables the limiting boss  30  to move towards the direction of compressing the second elastic element  50 , so that the post  31  can be released from the lens and when the user no longer presses the press key  10 , due to the action of the first elastic element  40  and the second elastic element  50 , the press key  10  and the limiting boss  30  will automatically rebound, and the post  31  protrudes and is snapped into the lens to prevent the lens from rotating and eventually falling off. The claws  22  of the press key bracket  20  can prevent the press key  10  from being released from the camera body of the camera when the press key rebounds. 
         [0040]    With reference to  FIG. 3  and  FIG. 4  at the same time, a camera body  200  of a camera provided in the embodiments of the present disclosure has a fixing frame  210 , an assembly such as a circuit board is arranged in the fixing frame  210 , and the fixing frame  210  is further provided with a telescopic limiting structure  100  and a lens assembling ring  230 . 
         [0041]    The fixing frame  210  is inwardly provided with a first assembling hole  214  on an outer side wall thereof; the end for assembling the lens is inwardly provided with a second assembling hole  212 ; and the press key  10 , the first elastic element  40 , and the press key bracket  20  of the telescopic limiting structure  100  are assembled into the first assembling hole  214 . The limiting boss  30  and the second elastic element  50  of the telescopic limiting structure  100  are assembled into the second assembling hole  212 . The first assembling hole  214  is in communication with the interior of the second assembling hole  212  so as to assemble the limiting boss  30 , the press key  10 , and the first elastic element  40  together. 
         [0042]    Specifically, the camera body  200  has a post body  216  in the interior of the second assembling hole  212 . Stepped faces  217  are formed on two sides of the post body  216 , and a guiding hole  218  is formed at the center of the post body  216 . The shaft  33  is inserted into the guiding hole  218 , and the end part of the second elastic element  50  abuts against the stepped faces  217  on two sides of the post body  216 . The guiding hole  218  is fitted with the shaft  33  so as to prevent the limiting boss  30  from inclining during movement. 
         [0043]    The lens assembling ring  230  is arranged at the end of the fixing frame  210  for assembling the lens. The post  31  of the limiting boss  30  passes through a locating hole  230   a  of the lens assembling ring  230  and protrudes outwards relative to the lens assembling ring  230 . A sliding groove  234  and a rib  232  are arranged on an inner side of the lens assembling ring  230  and used for rotating after the lens is screwed into the sliding groove  234  so that the rib  232  overlaps and snaps with the flange on the lens cone, realizing the function of preventing the lens from falling off in the axial direction. At the same time, the post  31  of the telescopic limiting structure  100  is embedded into the hole at the end part of the lens cone so as to prevent the rotation of the lens, thereby preventing the lens from eventually being released from the lens assembling ring  230  in the axial direction. 
         [0044]    It can be understood that, if a structure for preventing the press key  10  from falling off the camera body is provided in the camera body, the press key bracket  20  is not required. The press key and the first elastic element constitute a first-direction retractable member, and the limiting boss and the second elastic element constitute a second-direction retractable member. In the present embodiment, the first direction is substantially perpendicular to the second direction. The first direction is a radial direction parallel to the camera body, and the second direction is an axial direction parallel to the camera body. However, in other embodiments, the first direction and the second direction can be determined according to requirements and may not be necessarily perpendicular to each other. 
         [0045]    With reference to  FIG. 5  and  FIG. 6 , the embodiments of the present disclosure provide a camera  300  comprising a camera body  200  and, a lens  350 . A lens cone  370  of the lens  350  is provided with an assembling part  374 . The outer side wall of the assembling part  374  is provided with a flange  372 , and the flange  372  is used to overlap and snap with the rib  232  of the lens assembling ring  230  so as to realize the function of preventing the lens from falling off in the axial direction. One end of the lens, cone  370  is further inwardly provided with a hole  376  for fitting with the post  31  of the telescopic limiting structure  100 , so that the lens can be prevented from rotating and thereby from eventually being released from the lens assembling ring  230  in an axial direction. 
         [0046]    When it is desired to detach the lens, the press key  10  on the side face is pressed. The pressing forces the limiting boss  30  to move towards the fixing frame  210  so as to be released from the hole  376  of the lens, while the lens  350  can be held to rotate relative to the camera body  200  so as to be released from the lens assembling ring  230 , thereby separating the lens  350  from the camera body. 
         [0047]    In summary, the first-direction retractable member of the telescopic limiting structure in the embodiments of the present disclosure drives the second-direction retractable member to move via inclined face fitting. For example, when the camera is held by one hand in the second direction of the camera, the lens can be easily and steadily pressed by a finger, and the retractable member can he released by the other hand in the first direction, avoiding interference of operations in the same direction. The camera body and the camera in the embodiments of the present disclosure can prevent the lens from falling off and deviation after the lens is rotated, while facilitating detachment and attachment of the lens and smoother usage thereof. 
         [0048]    The description above only relates to the embodiments of the present disclosure and is not intended to limit the scope of the present disclosure, and any transformation with equivalent structures or equivalent procedures made using the contents of the specification and accompanying drawings of the present disclosure or applied in other relevant technical fields directly or indirectly should likewise be encompassed in the scope of the present disclosure.