Patent Publication Number: US-2022235898-A1

Title: Support frame and photographing device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present disclosure claims the priority to the Chinese patent application with the filing number 202010916504.3, filed on Sep. 3, 2020 with the Chinese Patent Office, and entitled “Support Frame and Photographing Device”, the contents of which are incorporated herein by reference in entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of photographic and camera shooting equipment, in particular to a support frame and a photographing device. 
     BACKGROUND ART 
     With the development of society, the number of people who love photographing is growing day by day, and the functions of the photographic equipment are also constantly improved. Currently, when photographing, if holding a handheld apparatus used in the relevant art such as photographing or camera shooting for a long time, the user will feel uncomfortable with hand or arm. 
     SUMMARY 
     The present disclosure provides a support frame, which includes a first pan-tilt connector and a leg assembly connected to the first pan-tilt connector; 
     the leg assembly includes a primary leg and a secondary leg; a leg adjustment structure is provided between the primary leg and the secondary leg, the leg adjustment structure is configured to unlock or lock the primary leg and the secondary leg, so that the primary leg and the secondary leg can move relatively or keep relatively stationary; 
     the secondary leg includes a first sub-leg and a second sub-leg, and the first sub-leg and the second sub-leg are configured in such a manner that the first sub-leg and the second sub-leg can be unfolded or folded with respect to each other, wherein when the first sub-leg and the second sub-leg are unfolded with respect to each other, the primary leg, the first sub-leg and the second sub-leg are in a three-leg support state. 
     Optionally, one end of the primary leg, one end of the first sub-leg and one end of the second sub-leg are connected to each other so as to form an end connection portion; and 
     the first pan-tilt connector is provided at the end connection portion. 
     Optionally, the support frame further includes a second pan-tilt connector, wherein the second pan-tilt connector is provided on the primary leg. 
     Optionally, the support frame further includes a stop member, wherein at least the primary leg is provided with the stop member configured to enable the support frame to be mounted on a host object. 
     Optionally, an angle adjustment structure is provided between the first sub-leg and the second sub-leg, and configured to adjust an opening angle between the first sub-leg and the second sub-leg. 
     Optionally, the angle adjustment structure includes a damping shaft configured to pass through a damping hole of the first sub-leg and a damping hole of the second sub-leg, wherein each of inner walls of the damping hole of the first sub-leg and the damping hole of the second sub-leg is provided with a first limiting rib extending along the axial direction of the each inner wall, and the first limiting rib is configured to be limited in the first limiting groove which is located at outer circumferential surface of the damping shaft and extends along an axis of the damping shaft. 
     Optionally, the support frame further includes a pan-tilt adjustment structure, configured to adjust a rotation angle of the first pan-tilt connector relative to the primary leg. 
     Optionally, the pan-tilt adjustment structure includes a first button, a first crankset, a second crankset and a first elastic member, wherein the first crankset is fixedly connected to the first pan-tilt connector, and the first elastic member is configured to enable teeth on the second crankset to mesh with teeth on the first crankset; the first button is configured to overcome an elastic force of the first elastic member under action of an external force, so that the teeth on the second crankset are separated from the teeth on the first crankset. 
     Optionally, the leg adjustment structure includes a first adapter (i.e. first switching element or transition element); the first adapter includes a first cylindrical ring; an outer circumferential surface of the first cylindrical ring has a plurality of positioning grooves distributed along a circumferential direction of the first cylindrical ring, the primary leg has a second button, and the second button is configured to be able to be limited in different positioning grooves, so as to adjust the opening angle between the primary leg and the secondary leg. 
     Optionally, the primary leg is fixedly connected to a second adapter (i.e. second switching element or transition element), the second adapter is connected to the first adapter, and the second adapter can rotate relative to the first adapter; the first crankset and the second crankset are both located between the second adapter and the first adapter, and wherein the second crankset is located between the first crankset and the second adapter. 
     Optionally, one surface of the second crankset having no teeth has a guide post, and one surface of the second adapter has a guide groove cooperating with the guide post. 
     Optionally, the second adapter has a shaft hole, and the guide groove is provided on a hole wall of the shaft hole. 
     Optionally, one end of the first elastic member abuts against a hole bottom of the shaft hole, and the other end of the first elastic member abuts against one surface of the second crankset having the guide post. 
     Optionally, the pan-tilt adjustment structure further includes a first nylon gasket, a second nylon gasket, a retaining screw, a screw sleeve, a locking screw and a shaft sleeve, wherein the first nylon gasket is located between the first adapter and the first crankset, the second nylon gasket is sandwiched between the first crankset and the second adapter, a stop cap of the shaft sleeve is in contact with one side of the second adapter, the locking screw is threadedly connected to an internal thread of the screw sleeve after passing through a sleeve hole of the shaft sleeve, and the retaining screw is threadedly connected to the threaded hole at the end of the locking screw. 
     Optionally, the angle adjustment structure further includes a third nylon gasket, a fourth nylon gasket, a bottom cover and a flat-head screw, wherein the third nylon gasket is located between a disc-like structure of the first sub-leg and a bottom rest, the fourth nylon gasket is located between a disc-like structure of the second sub-leg and the disc-like structure of the first sub-leg, the bottom cover is fixedly connected to the insertion shaft of the first adapter via the flat-head screw, the bottom cover has a concave hole, and the concave hole has an inner spline cooperating with an outer spline on an outer surface of the insertion shaft. 
     Optionally, the first pan-tilt connector is fixedly connected to an outer circumferential surface of the first crankset. 
     Optionally, the first pan-tilt connector is provided with a first insertion slot, an insertion opening of the first insertion slot is provided with a first stopper, and the first stopper is configured to be able to extend or retract under the elastic action of the second elastic member. 
     Optionally, the second pan-tilt connector is provided with a second insertion slot, an insertion opening of the second insertion slot is provided with a second stopper, and the second stopper is configured to be able to extend or retract under the elastic action of the third elastic member. 
     Optionally, the stop member is provided at the other opposite end of the primary leg (i.e., one end of the primary leg that is not connected to one end of the first sub-leg and one end of the second sub-leg), and the stop member is configured to be rotatable relative to the primary leg for cooperating with the primary leg to form a hook structure. 
     The present disclosure further provides a photographing device, which includes an image acquisition apparatus and the support frame; and the image acquisition apparatus is mounted on the support frame. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order to more clearly illustrate the technical solutions in specific embodiments of the present disclosure or in the prior art, drawings which need to be used in the description of the specific embodiments or the prior art will be introduced briefly below, and apparently, the drawings in the description below merely show some embodiments of the present disclosure, and a person ordinarily skilled in the art still could obtain other drawings in light of these drawings without using creative efforts. 
         FIG. 1  is an axonometric view of a support frame provided in embodiments of the present disclosure; 
         FIG. 2  is a front view of the support frame provided in embodiments of the present disclosure; 
         FIG. 3  is a right view of the support frame provided in embodiments of the present disclosure; 
         FIG. 4  is an exploded view of the support frame provided in embodiments of the present disclosure; 
         FIG. 5  is an exploded view of the support frame provided in embodiments of the present disclosure, from another perspective; 
         FIG. 6  is a sectional view of a partial structure of the support frame provided in embodiments of the present disclosure; 
         FIG. 7  is a structural schematic view of a first adapter in embodiments of the present disclosure; 
         FIG. 8  is a structural schematic view of a shaft sleeve in embodiments of the present disclosure; 
         FIG. 9  is an exploded view showing the first adapter, a damping shaft, a first sub-leg and a second sub-leg in embodiments of the present disclosure; 
         FIG. 10  is a structural schematic view of a bottom cover in embodiments of the present disclosure; 
         FIG. 11  is a structural schematic view of assembly relationship among the first adapter, the damping shaft, the first sub-leg and the second sub-leg, viewed from the bottom to the top, in embodiments of the present disclosure (a flat-head screw and the bottom cover are removed); 
         FIG. 12  is a local enlarged view of part A in  FIG. 11 ; 
         FIG. 13  is a structural schematic view of the damping shaft in embodiments of the present disclosure; 
         FIG. 14  is a structural schematic view showing that an image acquisition device is mounted on the support frame through a pan-tilt in embodiments of the present disclosure (handheld mode); 
         FIG. 15  is a structural schematic view showing that the image acquisition device is mounted on the support frame in embodiments of the present disclosure (high-position three-leg support mode); 
         FIG. 16  is a structural schematic view showing that the image acquisition device is mounted on the support frame in embodiments of the present disclosure (low-position three-leg support mode); 
         FIG. 17  is a structural schematic view showing that the support frame is in a mount state in embodiments of the present disclosure; 
         FIG. 18  is a structural schematic view showing that the image acquisition device is mounted on the support frame in embodiments of the present disclosure (hanging mode); 
         FIG. 19  is a structural schematic view showing that the image acquisition device is mounted on the support frame in embodiments of the present disclosure (extended handheld mode); 
         FIG. 20  is a structural schematic view of connecting a primary leg and a second adapter in embodiments of the present disclosure; 
         FIG. 21  is a local enlarged schematic view of part B in  FIG. 9 ; 
         FIG. 22  is a structural schematic view of assembly relationship of a first insertion slot, a first stopper and a second elastic member of the first pan-tilt connector provided in embodiments of the present disclosure; and 
         FIG. 23  is a structural schematic view of assembly relationship of a second insertion slot, a second stopper and a third elastic member of the second pan-tilt connector provided in embodiments of the present disclosure. 
     
    
    
     REFERENCE SIGNS 
       10 —leg assembly;  20 —leg adjustment structure;  40 —angle adjustment structure;  101 —primary leg;  201 —secondary leg;  102 —first sub-leg;  103 —second sub-leg;  104 —first pan-tilt connector;  105 —second pan-tilt connector;  106 —stopper;  107 —first button;  108 —first crankset;  109 —second crankset;  110 —first elastic member;  210 —second elastic member;  310 —third elastic member;  112 —first adapter;  113 —second adapter;  114 —keycap;  115 —key handle;  116 —insertion hole;  117 —first protrusion;  118 —guide post;  119 —guide groove;  120 —first nylon gasket;  121 —second nylon gasket;  122 —retaining screw;  123 —screw sleeve;  124 —locking screw;  125 —shaft sleeve;  126 —shaft hole;  127 —stop cap;  128 —positioning shaft;  129 —rotation stop groove;  130 —rotation stop protrusion;  131 —first cylindrical ring;  132 —insertion shaft;  133 —damping shaft;  134 —positioning groove;  135 —arc-shaped curved surface;  136 —bottom rest;  137 —first columnar portion;  138 —second columnar portion;  139 —return elastic member;  140 —key hole;  141 —side hole;  142 —shield;  143 —protrusion;  144 —recess;  145 —arc-shaped surface;  146 —first limiting groove;  147 —damping hole;  148 —disc-like structure;  149 —third nylon gasket;  150 —fourth nylon gasket;  151 —bottom cover;  152 —flat-head screw;  153 —concave hole;  154 —first insertion slot;  155 —first stopper;  156 —first pin shaft;  157 —second pin shaft;  159 —second insertion slot;  160 —leg cover;  162 —fifth pin shaft;  163 —countersink;  164 —second stopper;  165 —first limiting rib;  166 —positioning notch;  200 —image acquisition apparatus;  300 —host object. 
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Technical solutions of the present disclosure will be described clearly and completely below in combination with accompanying drawings, and apparently, the embodiments described are only a part of embodiments of the present disclosure, rather than all embodiments. 
     Generally, components in the embodiments of the present disclosure described and shown in the accompanying drawings herein may be arranged and designed in different configurations. Therefore, the detailed description below of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of protection of the present disclosure, but merely represents chosen embodiments of the present disclosure. 
     Based on the embodiments in the present disclosure, all of other embodiments obtained by a person ordinarily skilled in the art, without using creative efforts, shall fall within the scope of protection of the present disclosure. 
     In the description of the present disclosure, it should be indicated that orientational or positional relationships indicated by terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and so on are based on orientational or positional relationships as shown in the accompanying drawings, merely for facilitating describing the present disclosure and simplifying the description, rather than indicating or suggesting that related devices or elements have to be in the specific orientation or configured and operated in a specific orientation, therefore, they should not be construed as limiting the present disclosure. Besides, terms “first”, “second”, and “third” are merely for descriptive purpose, but should not be construed as indicating or implying importance in the relativity. 
     In the description of the present disclosure, it should be noted that unless otherwise specified and defined clearly, terms “mount”, “join”, and “connect” should be understood in a broad sense, for example, a connection may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it also may be an inner communication between two elements. For a person ordinarily skilled in the art, specific meanings of the above-mentioned terms in the present disclosure could be understood according to specific circumstances. 
     The present disclosure provides a support frame and a photographing device, so as to solve the technical problem in the prior art that the user may feel uncomfortable with hand or arm if holding the device with hand for a long time. 
     The beneficial effects of the present disclosure mainly lie in the follows. 
     For the support frame provided in the present disclosure, unlocking and locking between a primary leg and a secondary leg may be conveniently realized through a leg adjustment structure; moreover, the secondary leg includes a first sub-leg and a second sub-leg which can be unfolded or folded, thus three-leg support may be realized just through the three legs, so that after long-term handholding, the first sub-leg and the second sub-leg may be unfolded, then the two hands may be freed through the three-leg support, and the use functions of the support frame is diversified. 
     The present disclosure further provides a photographing device, which includes an image acquisition device and the support frame; and the image acquisition device is mounted on the support frame. Based on the above analysis, it can be seen that the photographing device may have multiple use states, and it may be handheld or may be supported by three legs so as to free the two hands. 
     Referring to  FIG. 1  to  FIG. 21 , an embodiment of the present disclosure provides a support frame, which includes a first pan-tilt connector  104  and a leg assembly  10  connected to the first pan-tilt connector  104 ; the leg assembly  10  includes a primary leg  101  and a secondary leg  201 ; a leg adjustment structure  20  is provided between the primary leg  101  and the secondary leg  201 , for unlocking or locking the primary leg  101  and the secondary leg  201 , so that the primary leg  101  and the secondary leg  201  may move with respect to each other or keep relatively stationary; the secondary leg  201  may include a first sub-leg  102  and a second sub-leg  103 , and the first sub-leg  102  and the second sub-leg  103  may be unfolded or folded with respect to each other; when the first sub-leg  102  and the second sub-leg  103  are unfolded with respect to each other, the primary leg  101 , the first sub-leg  102  and the second sub-leg  103  are in a three-leg support state. 
     The relative movement between the primary leg  101  and the secondary leg  201  may refer to an action such as rotation or turning of the primary leg  101  relative to the secondary leg  201 , so that an angle formed between a length direction of the primary leg  101  and a length direction of the secondary leg  201  may be adjusted, that is, an opening angle between the primary leg  101  and the secondary leg  201  may be adjusted; however, the leg adjustment structure  20  has the unlocking and locking functions, that is, after unlocking, the opening angle between the primary leg  101  and the secondary leg  201  may be adjusted according to needs, and after a required angle is obtained, the required angle between the primary leg  101  and the secondary leg  201  is kept through the locking function, that is, the required angle is kept unchanged. The primary leg  101  may be folded with the secondary leg  201 , which facilitates the storage of the support frame and reduces the space occupied by the support frame. 
     The first sub-leg  102  and the second sub-leg  103  may be unfolded or folded through an action such as relative rotation or turning. When the first sub-leg  102  and the second sub-leg  103  are folded, the storage of the support frame is facilitated and the space occupied by the support frame is reduced. When the opening angle has been adjusted between the primary leg  102  and the secondary leg  103 , the primary leg  101 , the first sub-leg  102  and the second sub-leg  103  are in a common three-leg support state by unfolding the first sub-leg  102  and the second sub-leg  103 , achieving support for the image acquisition apparatus  200 . 
     When the image acquisition apparatus  200  itself is provided with an interface structure cooperating with the first pan-tilt connector  104  in this embodiment, the image acquisition apparatus  200  may be directly mounted on the first pan-tilt connector  104 ; when having no interface structure cooperating with the first pan-tilt connector  104 , the image acquisition apparatus  200  may be mounted on the first pan-tilt connector  104  in an indirect manner, that is, an indirect mounting structure is adopted, for example, the image acquisition apparatus  200  is mounted on the first pan-tilt connector  104  by a mounting structure that can be adopted, such as, a quick release plate, a pan-tilt or a mounting clip. 
     It should be noted that, the number of sub-legs of the secondary leg may be not limited to two, that is, including the first sub-leg  102  and the second sub-leg  103 , and the number of sub-legs of the secondary leg also may be three, four, five or more. 
     For the support frame provided in an embodiment of the present disclosure, unlocking and locking between the primary leg  101  and the secondary leg  201  may be conveniently realized through the leg adjustment structure  20 ; moreover, the secondary leg  201  includes the first sub-leg  102  and the second sub-leg  103 , and can be unfolded or folded, thus three-leg support may be realized just through the three legs, so that after long-term handholding, the first sub-leg  102  and the second sub-leg  103  may be unfolded, then the two hands may be freed through the three-leg support, and the use functions of the support frame is diversified. 
     In an optional solution of this embodiment, one end of the primary leg  101 , one end of the first sub-leg  102  and one end of the second sub-leg  103  are connected to each other so as to form an end connection portion; and the first pan-tilt connector  104  is provided at the end connection portion. The end connection portion may refer to a spatial position of the first pan-tilt connector  104  on the support frame. As shown in  FIG. 19 , the support frame may further include a second pan-tilt connector  105 , wherein the second pan-tilt connector  105  is provided on the primary leg  101 , and the second pan-tilt connector  105  may be provided in the middle of the primary leg  101 , at the other end of the primary leg  101  or at a position close to the other end of the primary leg  101 , then the image acquisition apparatus  200  may be mounted at different positions on the support frame through the second pan-tilt connector  105 , so as to meet different use requirements. 
     It should be noted that, optionally, the first pan-tilt connector  104  further may be provided on the primary leg  101 , and the second pan-tilt connector  105  is provided on the end connection portion formed after one end of the primary leg  101 , one end of the first sub-leg  102  and one end of the second sub-leg  103  are connected to each other. 
     In an optional solution of this embodiment, the support frame further includes a stop member  106 , and at least the primary leg  101  is provided with the stop member  106  for enabling the support frame to be mounted on a host object  300  (as shown in  FIG. 18 ). Through the stop member  106 , the support frame may be hung on the host object  300 , in this way, on the one hand, the two hands may be freed, and on the other hand, different photographing requirements may be satisfied. The host object  300  may be a wall, a plate, a rack, or all structures that can facilitate hanging the support frame, and enable the support frame to be in a stable state, so that the situation that the image acquisition apparatus  200  shakes or the support frame falls from the host object  300  due to the instability of the support frame can be avoided. 
     It should be noted that at least one sub-leg of the first sub-leg  102  and the second sub-leg  103  may also be provided with the stop member  106 , which facilitates enabling the support frame to be mounted on the host object  300 . 
     In an optional solution of this embodiment, the support frame further includes a pan-tilt adjustment structure for adjusting a rotation angle of the first pan-tilt connector  104  relative to the primary leg  101 . Through the pan-tilt adjustment structure, the rotation angle of the first pan-tilt connector  104  is advantageously realized, for example, a pitch angle is adjusted, so as to satisfy the requirements in photographing, for example, low-angle photographing, high-angle photographing or horizontal photographing. It should be noted that when a placement direction of the support frame is changed, the pitch angle may be changed into an azimuth angle, and may also be changed into another state, but the rotation angle of the first pan-tilt connector  104  is stilled changed. 
     In an optional solution of this embodiment, the pan-tilt adjustment structure includes a first button  107 , a first crankset  108 , a second crankset  109 , and a first elastic member  110 ; the first crankset  108  is fixedly connected to the first pan-tilt connector  104 , and the first elastic member  110  is configured to enable teeth on the second crankset  109  to mesh with teeth on the first crankset  108 ; the first button  107  is configured to overcome an elastic force of the first elastic member  110  under action of an external force, so that the teeth on the second crankset  109  are separated from the teeth on the first crankset  108 . 
     The first crankset  108  may be of an integral structure with the first pan-tilt connector  104 , thus it can ensure the safety and stability of an external device such as the image acquisition apparatus  200  on the first pan-tilt connector  104  in the using process. The first elastic member  110  may be a spring, and the teeth on the second crankset  109  can mesh with the teeth on the first crankset  108  by applying through the first elastic member  110  a force on the second crankset  109 . There are a plurality of teeth on the first crankset  108  and on the second crankset  109  respectively, and the plurality of teeth may be distributed in a circular shape, that is, the plurality of teeth form a circular shape. In use, the user presses the first button  107 , so that the first button  107  can move in a first direction against the elastic force of the first elastic member  110 , so that the first elastic member  110  is compressed, and finally the teeth on the second crankset  109  and the teeth on the second crankset  108  no longer mesh with each other, and at this time, the rotation angle of the first pan-tilt connector  104  may be adjusted. When the external force is withdrawn, that is, when the user no longer applies a force onto the first button  107 , the elastic potential energy of the first elastic member  110  which is not compressed is released, then the second crankset  109  is allowed to move in the direction in which the first crankset  108  is located, so that the teeth on the second crankset  109  mesh with the teeth on the first crankset  108 , so as to lock the first pan-tilt connector  104 , thus the first pan-tilt connector cannot rotate freely. 
     In an optional solution of this embodiment, the support frame further includes a first adapter  112  and a second adapter  113 , wherein the first adapter  112  is connected to the secondary leg  201 , and the second adapter  113  is fixedly connected to the primary leg  101 . The first crankset  108  and the second crankset  109  are both located between the second adapter  113  and the first adapter  112 , wherein the second crankset  109  is located between the first crankset  108  and the second adapter  113 . After the first adapter  112  and the second adapter  113  are provided, the relative rotation between the primary leg  101  and the secondary leg is conveniently achieved. 
     In an optional solution of this embodiment, the first pan-tilt connector  104  is fixedly connected to the outer circumferential surface of the first crankset  108 . 
     In an optional solution of this embodiment, the first button  107  includes a keycap  114  and a key handle  115 , one end of the key handle  115  is connected to the keycap  114 , the first adapter  112  has a insertion hole  116  for the key handle  115  to pass therethrough, and the other end of the key handle  115  abuts against a surface of the second crankset  109 . The keycap  114  is conveniently pressed by a finger, and when the keycap  114  is pressed, the key handle  115  can enable the second crankset  109  to move, so that the teeth on the second crankset  109  are separated from the teeth on the first crankset  108 . 
     The keycap  114  may be circular, polygonal or the like; the number of key handles  115  is two, a radial section of each key handle  115  is in a circular arc shape, and a radial direction of each key handle  115  is parallel to a radial direction of the keycap  114 . The insertion hole  116  on the first adapter  112  may be in a circular arc shape, so as to fit with the key handles  115 ; the two key handles  115  are symmetrically provided at one side of the keycap  114 . Optionally, the other end of each key handle  115  has a first protrusion  117 , and the first protrusions  117  extend along the radial direction of the key handles  115  for limiting the key handles  115  on the first adapter  112 ; the key handles  115  have a certain elasticity, then when mounting the key handles  115  on the first adapter  112 , the two key handles  115  are pinched, and the key handles  115  are enabled to pass through their respective insertion holes  116 , and the first protrusions  117  are also enabled to pass through the first insertion holes  116 , then after the passing, the two key handles  115  are released, and the key handles  115  restore an original state under the action of elasticity, so that the first protrusions  117  function to stop and prevent the key handles  115  from escaping from the first adapter  112 . By providing the two key handles  115  and the two insertion holes  116 , the movement of the first button  107  also may be guided, thus preventing the first button  107  from rotating around an axis parallel to the first direction. 
     In an optional solution of this embodiment, the teeth on the second crankset  109  are located on one surface of the second crankset  109 , and the other opposite surface of the second crankset  109  is provided with a guide post  118 ; one surface of the second adapter  113  has a guide groove  119  cooperating with the guide post  118  for guiding the axial movement of the second crankset  109 . The rotation of the second crankset  109  relative to the second adapter  113  can be prevented, i.e., circumferential fixation of the second crankset and the second adapter is achieved, by the guide post  118  and the guide groove  119 . 
     The pan-tilt adjustment structure further includes a first nylon gasket  120 , a second nylon gasket  121 , a retaining screw  122 , a screw sleeve  123 , a locking screw  124  and a shaft sleeve  125 ; the first nylon gasket  120  and the second nylon gasket  121  are both in an annular shape; the first nylon gasket  120  is located between the first adapter  112  and the first crankset  108 , i.e. two opposite surfaces of the first nylon gasket  120  are in contact with the first adapter  112  and the first crankset  108  respectively; the second adapter  113  has a shaft hole  126 , the guide groove  119  is provided on a hole wall of the shaft hole  126 , and a maximum outer diameter of the second crankset  109  is smaller than an inner diameter of the shaft hole  126 , so that the second crankset  109  can move in the shaft hole  126 . An inner ring diameter of the second nylon gasket  121  should be larger than the maximum outer diameter of the second crankset  109 , and the second nylon gasket  121  is sandwiched between the first crankset  108  and the second adapter  113 , that is, two opposite surfaces of the second nylon gasket  121  are in contact with the first crankset  108  and the second adapter  113  respectively; by providing the first nylon gasket  120  and the second nylon gasket  121 , the first crankset  108  has a certain damping force when driving the first pan-tilt connector  104  to rotate. One end of the shaft sleeve  125  has a stop cap  127 , and the other end of the shaft sleeve  125  passes, after being inserted from a mounting through hole on the second adapter  113 , through a mounting through hole on the second crankset  109 , and then is sleeved over a positioning shaft  128  provided on one surface of the first adapter  112 . An inner wall of the hole of the shaft sleeve  125  has a rotation stop groove  129 , and the positioning shaft  128  is provided with a rotation stop protrusion  130 . The rotation stop protrusion  130  cooperates with the rotation stop groove  129 , and after the shaft sleeve  125  is sleeved over the positioning shaft  128  on the first adapter  112 , the relative rotation between the shaft sleeve  125  and the first adapter  112  is prevented by the rotation stop protrusion  130  and the rotation stop groove  129 . An external thread of the screw sleeve  123  is threadedly connected to a threaded hole on the first adapter  112 ; the locking screw  124  is threadedly connected to an internal thread of the screw sleeve  123  after passing through a sleeve hole of the shaft sleeve  125 , and the retaining screw  122  is threadedly connected to the threaded hole at the end of the locking screw  124 . The stop cap  127  of the shaft sleeve  125  may be in contact with one side of the second adapter  113 . The retaining screw  122  can prevent the locking screw  124  from escaping from the shaft sleeve  125 ; the first adapter  112  and the second adapter  113  are connected together by the locking screw  124 , the shaft sleeve  125 , the screw sleeve  123  and the retaining screw  122 , and the second adapter  113  can rotate relative to the first adapter  112 . The first direction is parallel to an axial direction of the shaft sleeve  125 . One end of the first elastic member  110  abuts against a hole bottom of the shaft hole  126 , and the other end of the first elastic member  110  abuts against one surface of the second crankset  109  having the guide post  118 . It should be noted that the screw sleeve  123  may also be of an integral structure with the first adapter  112 , that is, a threaded hole cooperating with the external screw of the locking screw  124  is provided on the first adapter; in addition, the method for preventing the locking screw  124  from escaping from the shaft sleeve  125  is not limited thereto, the retaining screw further may be replaced by other fasteners, and the fasteners may be a clamping spring (i.e. stop ring) or a pin which may be a split pin; when a clamping spring is adopted, an anti-disengagement slot may be provided in the circumferential direction of the end of the locking screw, and when the end of the locking screw provided with the anti-disengagement slot extends out of the screw sleeve  123 , the clamping spring is clamped into the anti-disengagement slot, thereby the locking screw can be prevented from escaping; and when a pin is used, a radial perforation may be provided at the end of the locking screw, and after the end of the locking screw provided with the radial perforation extends out of the screw sleeve  123 , the pin is inserted into the radial perforation, so that the locking screw can be prevented from escaping. 
     In an optional solution of this embodiment, the first adapter  112  may be an integral part of the leg adjustment structure; the first adapter  112  includes a first cylindrical ring  131  and an insertion shaft  132  fixedly connected to an outer circumferential surface of the first cylindrical ring  131 ; the insertion shaft  132  is inserted into a damping shaft  133 , and the insertion shaft  132  is circumferentially fixed to the damping shaft  133 ; the outer circumferential surface of the first cylindrical ring  131  has a plurality of positioning grooves  134  distributed along its own circumferential direction, the primary leg  101  has a second button, and the second button can be limited in different positioning groove  134 , so as to adjust the opening angle between the primary leg  101  and the secondary leg. 
     The first adapter  112  further may include a bottom rest  136  having an arc-shaped curved surface  135 , wherein the arc-shaped curved surface  135  is located on an upper surface of the bottom rest  136 , and the first cylindrical ring  131  is fixed on the upper surface of the bottom rest  136 . The insertion shaft  132  is fixed to a lower surface of the bottom rest  136 , that is, the insertion shaft  132  is fixedly connected to the first cylindrical ring  131  via the bottom rest  136 . The arc-shaped curved surface  135  may be adapted to a circular outer circumferential surface of the first crankset  108  and a circular outer circumferential surface of the second adapter  113 , and the first crankset  108  and the second adapter  113  are supported by the arc-shaped curved surface  135  to a certain extent. 
     In an optional solution of this embodiment, the number of positioning grooves  134  is at least three, the second button includes a first columnar portion  137  and a second columnar portion  138  connected to the first columnar portion  137 , and an axis of the first columnar portion  137  is perpendicular to an axis of the second columnar portion  138 ; the first columnar portion  137  abuts against a return elastic member  139 , and is configured in such a manner that when the first columnar portion  137  is pressed, the second columnar portion can escape from the positioning groove  134 , so that the second adapter  113  can rotate relative to the first adapter  112 . 
     The primary leg  101  has a key hole  140  and a side hole  141 , and the side hole  141  is provided on a hole wall of the key hole  140 ; and an axial direction of the side hole  141  is perpendicular to an axial direction of the key hole  140 . The first columnar portion  137  is inserted into the key hole  140 , and the second columnar portion  138  is inserted into the side hole  141 . Since the second columnar portion  138  is inserted into the side hole  141 , and the second columnar portion  138  is connected to the first columnar portion  137 , the first columnar portion  137  will not escape from the key hole  140 . The return elastic member  139  may be a spring, and the return elastic member  139  is mounted in the key hole  140 , and abuts against one end of the first columnar portion  137 . The side hole  141  may be a waist-shaped hole or a stripe-shaped hole, so that when the first columnar portion  137  is pressed, the second columnar portion  138  may move radially along the waist-shaped hole or the stripe-shaped hole, thereby facilitating the end of the second columnar portion inserted into the positioning groove  134  to escape from the positioning groove  134 . The first columnar portion  137  may be threadedly connected with the second columnar portion  138 . When three positioning grooves  134  are provided, three angular changes may be achieved between the primary leg  101  and the secondary leg. 
     It should be noted that the number of positioning grooves  134  also may be two, four, five or more, so as to meet the requirements of different situations. 
     In an optional solution of this embodiment, the primary leg  101  is fixedly connected to the second adapter  113 , and the primary leg and the second adapter may be of an integral structure. When being unlocked by the second button, the end of the second columnar portion escapes from the positioning groove  134 , so that the second adapter  113  can rotate relative to the first adapter  112 , so as to adjust the opening angle between the primary leg  101  and the secondary leg. 
     In an optional solution of this embodiment, the support frame further includes a shield  142 , and a length extension direction of the shield  142  is in an arc shape so as to be adapted to the outer circumferential surface of the first cylindrical ring  131 ; and the shield  142  can cover the plurality of positioning grooves  134  to avoid entry of foreign matters. One end of the shield  142  has a protrusion  143 , an end face of one end of the primary leg  101  has a recess  144 , the protrusion  143  is inserted into the recess  144 , a lower surface of the first pan-tilt connector  104  has an arc-shaped surface  145 , and the shield  142  is limited between an outer circumferential surface of the first cylindrical ring  131  and an arc-shaped surface  145  of the lower surface of the first pan-tilt connector  104 , so that the shield  142  can be prevented from escaping from the support frame. When the primary leg  101  rotates relative to the first adapter  112 , the shield  142  will be driven to rotate around the outer circumferential surface of the first cylindrical ring  131 . 
     In an optional solution of this embodiment, an angle adjustment structure  40  is provided between the first sub-leg  102  and the second sub-leg  103 , so as to adjust an opening angle between the first sub-leg  102  and the second sub-leg  103 . By means of the angle adjustment structure  40 , the unfolding or folding between the first sub-leg  102  and the second sub-leg  103  can be realized, and after adjusting the opening angle, it is helpful to keep the required angle not to be changed easily. The angle adjustment structure  40  can realize that a fixed set angle is formed after the first sub-leg and the second sub-leg are unfolded. 
     Referring to  FIG. 9 ,  FIG. 11 ,  FIG. 12 ,  FIG. 13  and  FIG. 21 , in an optional solution of this embodiment, the damping shaft  133  may be an integral part of the angle adjustment structure  40 , and an outer circumferential surface of the damping shaft  133  has a first limiting groove  146  extending along its own axis. 
     One end of the first sub-leg  102  and one end of the second sub-leg  103  each have a damping hole  147 , and an inner wall of the damping hole  147  is provided with a first limiting rib  165  extending along its own axial direction; the damping shaft  133  passes through the damping hole  147  of the first sub-leg  102  and the damping hole  147  of the second sub-leg  103 , and the first limiting rib is located in the first limiting groove  146 . The groove bottom of the first limiting groove is provided with a positioning notch  166 , and the positioning notch is close to a groove wall of the first limiting groove; optionally, the number of positioning notch may be two, and the two positioning notches are located at two opposite groove walls to the first limiting groove, respectively; when the first sub-leg and the second sub-leg are fully unfolded to form a set angle, the first limiting rib falls into the positioning notch, so that it is helpful to keep the set angle between the first sub-leg and the second sub-leg not to be changed easily. It should be noted that the material of the damping shaft may be plastic, rubber or silicone, so that the damping shaft can be deformed to a certain extent, so as to facilitate the stability of the angle between the two sub-legs after the first limiting rib falls into the positioning notch. 
     The damping shaft  133  may have a spline hole, and an outer surface of the insertion shaft  132  may have an outer spline, so that after the insertion shaft  132  is inserted into the spline hole of the damping shaft  133 , the outer spline on the insertion shaft  132  cooperates with the inner spline in the spline hole, thus circumferential fixation between the damping shaft  133  and the insertion shaft  132  may be realized. One end of the first sub-leg  102  and one end of the second sub-leg  103  each have a disc-like structure  148 , and the damping hole  147  is provided on the disc-like structure  148 ; and the disc-like structure  148  of the first sub-leg  102  is located between the disc-like structure  148  of the second sub-leg  103  and the bottom rest  136 . 
     The axial direction of the insertion shaft  132  is perpendicular to the axial direction of the shaft sleeve  125 , which is beneficial to realize that a rotational axis of the primary leg  101  relative to the secondary leg  201  is perpendicular to a rotational axis of the first sub-leg  102  relative to the second sub-leg  103 , thereby being favorable for realizing three-leg support. When three legs are used for supporting, taking ground, as a position where the support frame is placed, as an example for illustration, when three legs are used for supporting, the rotational axis of the primary leg  101  relative to the secondary leg  201  may be parallel to the ground, while the rotational axis of the first sub-leg  102  relative to the second sub-leg  103  is perpendicular to the ground, in this way, when the angle between the primary leg  101  and the secondary leg  201  is fixed through locking by the leg adjustment structure, the force exerted on the support frame by the image acquisition apparatus  200  placed on the first pan-tilt connector  104  is a downward force, and as the rotational axis of the first sub-leg relative to the second sub-leg is perpendicular to the ground, the first sub-leg and the second sub-leg are less likely to rotate relative to each other, thus ensuring the stability and safety of the image acquisition apparatus  200  during use; in addition, the rotational axis of the primary leg  101  relative to the secondary leg  201  is perpendicular to the rotational axis of the first sub-leg relative to the second sub-leg, which is also advantageous to realize the extended handheld mode. 
     The angle adjustment structure  40  further may include a third nylon gasket  149 , a fourth nylon gasket  150 , a bottom cover  151  and a flat-head screw  152 , and the third nylon gasket  149  is located between the disc-like structure  148  of the first sub-leg  102  and the bottom rest  136 , so that there may be a certain damping force when the first sub-leg  102  rotates; the fourth nylon gasket  150  is located between the disc-like structure  148  of the second sub-leg  103  and the disc-like structure  148  of the first sub-leg  102 , so that there may be a certain damping force when the first sub-leg  102  and the second sub-leg  103  rotate. The bottom cover  151  is fixedly connected to the insertion shaft  132  via the flat-head screw  152 , the bottom cover  151  has a concave hole  153 , and the concave hole  153  has an inner spline cooperating with the outer spline on the outer surface of the insertion shaft  132 , in this way, the bottom cover  151  can be avoided from rotating along with the second sub-leg  103  to cause loosening of the flat-head screw  152 . The bottom cover  151  may prevent the first sub-leg  102  and the second sub-leg  103  from escaping from the insertion shaft  132 . A disc surface of the disc-like structure  148  of the first sub-leg  102  is provided at an angle with the length extension direction of the first sub-leg  102 , the disc surface of the disc-like structure  148  of the second sub-leg  103  is provided at an angle with the length extension direction of the second sub-leg  103 , in this way, after the primary leg  101  and the secondary leg are folded, it is beneficial to realize that when the primary leg  101  and the secondary leg are handheld, the image acquisition apparatus  200  on the first pan-tilt connector  104  can better capture/shoot the user or other scenes. 
     In an optional solution of this embodiment, as shown in  FIG. 22 , the first pan-tilt connector  104  is provided with a first insertion slot  154 , an insertion opening of the first insertion slot  154  is provided with a first stopper  155 , and the first stopper  155  is configured to be able to extend or retract under the elastic action of the second elastic member  210 . The second elastic member  210  may realize the stability of the mounting of an external device mounted on the first pan-tilt connector  104 , and avoid the external device from escaping from the first insertion slot  154 . Likewise, the second pan-tilt connector  105  is provided with a second insertion slot  159 , an insertion opening of the second insertion slot  159  is provided with a second stopper  164 , and the second stopper  164  is configured to be able to extend or retract under the elastic action of the third elastic member  310 . The third elastic member  310  may realize the stability of the mounting of an external device mounted on the second pan-tilt connector  105 , and avoid the external device from escaping from the second insertion slot  159 . The first insertion slot  154  and the second insertion slot  159  both may be dovetail slots or wedge-shaped slots capable of achieving the same function. Both the second elastic member  210  and the third elastic member  310  may be springs. 
     One end of the first stopper  155  is rotatably connected to the first pan-tilt connector  104  through the first pin shaft  156 , the other end of the first stopper  155  may limit, through the second pin shaft  157 , the second elastic member  210  between the first stopper  155  and the groove bottom of the first insertion slot  154 , in this way, pressing the other end of the first stopper  155  can make the first stopper  155  move downward to achieve retraction, and when the first stopper  155  is released, the first stopper  155  may move upward, achieving the extension state, and positioning the external device mounted on the first pan-tilt connector  104 . The hole where the second pin shaft  157  is located is a waist-shaped hole, that is, the cross section of the hole is in a waist shape, so that when the first stopper  155  is pressed down, the second pin shaft  157  may move along a radial direction of the waist-shaped hole. 
     One end of the second stopper  164  is rotatably connected to the second pan-tilt connector  105  through the third pin shaft, the other end of the second stopper  164  may limit by a stop portion the second elastic member  210  between the second stopper  164  and the groove bottom of the second insertion slot  159 , in this way, pressing the other end of the second stopper  164  can make the second stopper  164  move downward to achieve retraction, and when the second stopper  164  is released, the second stopper  164  may move upward, achieving the extension state, and positioning the external device mounted on the second pan-tilt connector  105 . A leg cover  160  may be installed at the second insertion slot  159 , so that when the second pan-tilt connector  105  is not used, the leg cover  160  may be detachably connected to the second insertion slot  159  in a buckling way. 
     In an optional solution of this embodiment, the stop member  106  is provided at the other opposite end of the primary leg  101 , and the stop member  106  can rotate relative to the primary leg  101  for cooperating with the primary leg  101  to form a hook structure. 
     The stop member  106  is rotatably mounted at one end of the primary leg  101  by a fifth pin shaft  162 ; the primary leg  101  has a countersink  163 , and the stop member  106  can rotate to be received in the countersink  163 , and also can rotate to get out of the countersink  163 , so as to cooperate with the primary leg  101  to form a hook structure. The stop member  106  may be of a plate-like structure, and when the stop member  106  rotates out of the countersink  163 , the stop member  106  can be stopped by a wall of the countersink  163 , in this way, a first angle formed by the length direction of the stop member  106  and the length direction of the primary leg  101  is less than or equal to 90 degrees, and optionally, the first angle may be 60 degrees-70 degrees. One end of the plate-like structure is hinged with the primary leg  101 , and a plate surface of the other end of the plate-like structure has a positioning block; when the stop member  106  is received in the countersink  163 , the positioning block faces a bottom of the countersink  163 . An end surface of a free end of the plate-like structure has a pulling structure, so that the plate-like structure can be pulled out of the countersink  163  with a hand. The pulling structure may be a groove structure or a handle. The first sub-leg  102  and the second sub-leg  103  can be folded, and the primary leg  101  and the secondary leg  201  can be folded, in this way, the primary leg  101 , the first sub-leg  102  and the second sub-leg  103  are folded together to form one whole leg. In use, the photographing may be realized by holding the whole leg with hand. It should be noted that when the plate surface at the other end of the plate-like structure has a positioning block or other components capable of forming a hook structure with the plate-like structure, the first angle formed between the length direction of the stop member  106  and the length direction of the primary leg  101  may be greater than 90 degrees. 
     The support frame provided in this embodiment integrates the pan-tilt adjustment structure, the angle adjustment structure and the leg adjustment structure together, so that the three may work independently, and also may work cooperatively so as to meet different use requirements, enabling that the support frame has a handheld mode, a high-position three-leg support mode, a low-position three-leg support mode, an extended handheld mode and a hanging mode, etc. 
     I. Handheld Mode (See  FIG. 14 ) 
     By adjusting the angle adjustment structure and the leg adjustment structure, the primary leg  101 , the first sub-leg and the second sub-leg are folded together, and the image acquisition apparatus  200  may be mounted on the first pan-tilt connector  104 , then the user may hold the whole leg with hand; and in order to satisfy the pitch demand of the image acquisition apparatus  200 , the pitch angle may be adjusted by the pan-tilt adjustment structure  20 . 
     II. High-Position Three-Leg Support Mode (See  FIG. 15 ) 
     After long-time handheld mode or in order to realize three-leg support, the opening angle between the primary leg  101  and the secondary leg may be adjusted by adjusting the leg adjustment structure, then the high-position three-leg support mode may be realized by adjusting the opening angle between the first sub-leg  102  and the second sub-leg  103  through the angle adjustment structure. 
     III. Low-Position Three-Leg Support Mode (See  FIG. 16 ) 
     When a lower-height position is needed for photographing, the opening angle between the primary leg  101  and the secondary leg may be increased by adjusting the leg adjustment structure, meanwhile, the opening angle between the first sub-leg  102  and the second sub-leg  103  may be increased by adjusting the angle adjustment structure. The low-position three-leg support mode has stronger stability, and also facilitates obtaining a low-position close-up perspective. 
     IV. Hanging Mode (See  FIG. 17  and  FIG. 18 ) 
     When three legs are used for supporting, the stop member  106  may be rotated out of the countersink  163 , and the hook structure may be hung on the host object  300  such as a plate-mounted object, thereby realizing a stable supporting structure formed by two sub-legs and one hook structure, then the image acquisition apparatus  200  may be mounted and fixed, the use in multiple environments and scenes such as indoor or outdoor environment is satisfied, and shooting in a small space may be realized. 
     V. Extended Handheld Mode (See  FIG. 19 ) 
     The image acquisition apparatus  200  is mounted on the second pan-tilt connector  105 , and then the opening angle between the primary leg  101  and the secondary leg  201  is adjusted by the leg adjustment structure, and the photographing is realized by holding the secondary leg with hand; the opening angle between the primary leg  101  and the secondary leg  201  may be 140 degrees, which sufficiently takes into consideration the photographing perspective and the holding comfort of the human body, and complies with ergonomics. Through the extended handheld mode, a more open scene can be quickly obtained for framing, and the self-timer experience is greatly optimized. 
     An embodiment of the present disclosure further provides a photographing device, which includes the image acquisition apparatus  200  and the above support frame; and the image acquisition apparatus  200  is mounted on the support frame. The image acquisition apparatus  200  may be an apparatus capable of obtaining an image or video, such as a camera, a video camera, a mobile phone or a webcam. When the image acquisition apparatus  200  is mounted on the support frame, the photographing device may have a handheld photographing mode, a high-position three-leg support photographing mode, a low-position three-leg support photographing mode, an extended handheld photographing mode, a hanging photographing mode and so on. 
     In summary, the support frame and the photographing device provided in the embodiments of the present disclosure may be made of soft and hard rubber and metallic materials, so that they have high structural reliability, with stable photographing, relatively strong stability during use, and a plurality of use modes, and can realize handheld, high-position, low-position, extended and hanging modes and so on, wherein different modes can be quickly switched, to meet the photographing requirements of creating multiple scenes and multiple angles, with good user experience, and applicability to different application scenes; in addition, the three legs may be conveniently unfolded or folded, occupying a relative small space, then they are convenient to be carried, and easy to be disassembled and installed. The design of an ergonomic handheld angle makes the handholding more labor-saving; the first stopper  155  and the second stopper  164  respectively provided for the first pan-tilt connector  104  and the second pan-tilt connector  105  facilitate disassembly of the image acquisition apparatus  200 , facilitate rapid changing positions of the image acquisition apparatus  200  on the support frame, enabling that the camera has a wide field of view for use. 
     Finally, it should be explained that the various embodiments above are merely used for illustrating the technical solutions of the present disclosure, rather than limiting the present disclosure; although the detailed description is made to the present disclosure with reference to various preceding embodiments, those ordinarily skilled in the art should understand that they still could modify the technical solutions recited in various preceding examples, or make equivalent substitutions to some or all of the technical features therein; and these modifications or substitutions do not make the corresponding technical solutions essentially depart from the scope of the technical solutions of various embodiments of the present disclosure. In the description provided herein, numerous specific details are described. It will be appreciated, however, that the embodiments of the present disclosure may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of the present description. Besides, a person skilled in the art could understand that although some embodiments described herein include certain features included in other embodiments rather than other features, combinations of features in different embodiments mean that they fall within the scope of the present disclosure and form different embodiments. 
     INDUSTRIAL APPLICABILITY 
     The present disclosure provides a support frame and a photographing device, wherein a plurality of use modes of the support frame may be flexibly realized by adjusting the angle adjustment structure, the leg adjustment structure and the pan-tilt adjustment structure, i.e. the handheld mode, the high-position three-leg support mode, the low-position three-leg support mode, the hanging mode and the extended handheld mode, and a plurality of use states of the photographing apparatus, so as to solve the technical problem existing in the prior art that the user will uncomfortable with hand or arm if holding the apparatus for a long time.