Patent Publication Number: US-2021164605-A1

Title: Fixation structure and gimbal system

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of International Application No. PCT/CN2018/101396, filed Aug. 20, 2018, the entire content of which is incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure generally relates to the photographing technology field and, more particularly, to a fixation structure and a gimbal system. 
     BACKGROUND 
     When a camera is used to photograph, to ensure the stability of a captured picture, a gimbal is usually adopted to increase the stability of the camera. However, when the camera is carried at the gimbal, since the camera is too high and too heavy, the camera is not easy to be steadily carried at the gimbal. 
     SUMMARY 
     Embodiments of the present disclosure provide a fixation structure including a hot shoe plate, a hot shoe rod assembly, a locking assembly, and a fixation assembly. The hot shoe plate includes a connection member and a sliding member. The connection member is arranged at a first end of the hot shoe plate. The sliding member is arranged at a second end of the hot shoe plate that is opposite to the first end. The hot shoe rod assembly includes a fixation rod detachably mounted at the connection member. The fixation rod includes a top member and a bottom member opposite to each other. The bottom member is configured to be connected to a gimbal. The locking assembly is configured to fix the hot shoe rod assembly at the hot shoe plate. The fixation assembly is configured to cooperate with the sliding member to connect a load at any position of the sliding member. 
     Embodiments of the present disclosure provide a gimbal system including a gimbal, a load, and a fixation structure. The fixation structure is configured to be connected to the load at the gimbal. The fixation structure includes a hot shoe plate, a hot shoe rod assembly, a locking assembly, and a fixation assembly. The hot shoe plate includes a connection member and a sliding member. The connection member is arranged at a first end of the hot shoe plate. The sliding member is arranged at a second end of the hot shoe plate that is opposite to the first end. The hot shoe rod assembly includes a fixation rod detachably mounted at the connection member. The fixation rod includes a top member and a bottom member opposite to each other. The bottom member is configured to be connected to a gimbal. The locking assembly is configured to fix the hot shoe rod assembly at the hot shoe plate. The fixation assembly is configured to cooperate with the sliding member to connect a load at any position of the sliding member. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic perspective assembly diagram of a fixation structure according to some embodiments of the present disclosure. 
         FIG. 2  is a schematic perspective exploded diagram of the fixation structure according to some embodiments of the present disclosure. 
         FIG. 3  is a schematic enlarged view of part III in  FIG. 2 . 
         FIG. 4  is a schematic enlarged view of part IV in  FIG. 2 . 
         FIG. 5  is a schematic perspective assembly diagram of the fixation structure from another view angle according to some embodiments of the present disclosure. 
         FIG. 6  is a schematic cross-sectional structural diagram of the fixation structure along line VI-VI in  FIG. 1 . 
         FIG. 7  is a schematic cross-sectional structural diagram of the fixation structure along line VII-VII in  FIG. 1 . 
         FIG. 8  is a schematic cross-sectional structural diagram of the fixation structure along line VIII-VIII in  FIG. 1 . 
     
    
    
       
     
       
         
           
               
             
               
                   
               
               
                 Reference numerals: 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 10 
                 Fixation structure 
                 11 
                 Hot shoe plate 
                  11a 
                 First end 
               
               
                 111 
                 Connection member 
                 1111 
                 Through-hole 
                 11111  
                 Accommodation section 
               
               
                 11112 
                 Connection section 
                 11113 
                 Through section 
                 1112  
                 First locking member 
               
               
                 1113 
                 Second locking member 
                   
                   
                  11b 
                 Second End 
               
               
                 112 
                 Sliding member 
                 1121 
                 Sliding slot 
                 113 
                 Upper surface 
               
               
                 114 
                 Lower surface 
                 115 
                 Side surface 
                 1151  
                 Locking hole 
               
               
                 11511 
                 First sub locking hole 
                   
                   
                 11512  
                 Second sub locking hole 
               
               
                 116 
                 Cold shoe groove 
                 1161 
                 Upper part 
                 1162  
                 Lower part 
               
               
                 1163 
                 Connection opening 
                 117 
                 Connection opening 
                 118 
                 Position limiting member 
               
               
                 12 
                 Hot shoe rod assembly 
                   
                   
                 121 
                 Knob cover 
               
               
                 1211 
                 Cover body 
                 1212 
                 Connection rod 
                 122 
                 Fixation rod 
               
               
                 1221 
                 Top member 
                 12211 
                 Opening 
                 1222  
                 Bottom member 
               
               
                 12221 
                 Connection hole 
                 123 
                 Extension rod 
                 1231  
                 Connection end 
               
               
                 1232 
                 Opening end 
                 13 
                 Locking assembly 
                 131 
                 Locking part 
               
               
                 1311 
                 Locking end 
                 1312 
                 Knob end 
                 1313  
                 Abutting member 
               
               
                 132 
                 Locking knob 
                 1321 
                 Step through-hole 
                 133 
                 Locking gasket 
               
               
                 134 
                 Locking screw 
                   
                   
                 135 
                 Locking elastic member 
               
               
                 14 
                 Connection assembly 
                 15 
                 Fixation assembly 
                 151 
                 Adjustment knob 
               
               
                 1511 
                 Top surface 
                 1512 
                 Bottom surface 
                 1513  
                 Side surface 
               
               
                 1514 
                 Side hole 
                   
                   
                 152 
                 Adjustment threaded rod 
               
               
                 1521 
                 Rod body 
                 1522 
                 Blocking member 
                 153 
                 Upper fixation block 
               
               
                 1531 
                 Upper recess 
                 15311 
                 Bottom wall 
                 1532  
                 Sidewall 
               
               
                 15321 
                 Connection opening 
                 154 
                 Lower fixation block 
                 1541  
                 Body 
               
               
                 15411 
                 First surface 
                 15412 
                 Second surface 
                 15413  
                 Accommodation groove 
               
               
                 1542 
                 Protrusion 
                 1543 
                 Lower recess 
                 15431  
                 Bottom wall 
               
               
                 155 
                 Fixation gasket 
                 156 
                 Fastening member 
                 157 
                 Fixation elastic member 
               
               
                   
               
            
           
         
       
     
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Embodiments of the present disclosure are described in detail. Examples of embodiments are shown in the accompanying drawings. A same or similar character may be used to represent a same or similar element or elements having a same or similar function. Embodiments described with reference to the accompanying drawings are exemplary and only used to explain the present disclosure and should not be understood as a limitation of the present disclosure. 
     In the description of embodiments of the present disclosure, orientation or position relationship indicated by terms “center,” “longitudinal,” “transverse,” “length,” “width,” “thickness,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise” is based on the orientation or position relationship shown in the drawings, only to facilitate the description of embodiments of the present disclosure and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation. Therefore, the terms should not be understood to limit embodiments of the present disclosure. In addition, the terms “first” and “second” are used for descriptive purposes only, and should not be understood to indicate or imply relative importance or implicitly indicating the number of indicated technical features. Thus, a feature associated with “first” and “second” may explicitly or implicitly include one or more of such feature. In the description of embodiments of the present disclosure, the meaning of “plurality” is two or more, unless otherwise specified. 
     In the description of embodiments of the present disclosure, the terms “mount,” “connection,” and “coupling” should be understood in a broad sense. For example, the terms may indicate a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication, a direct connection, an indirect connection through an intermediary, internal communication of two components, or interaction relationship of two components. Those of ordinary skill in the art should understand the specific meanings of the above terms in embodiments of the present disclosure according to specific situations. 
     In embodiments of the present disclosure, unless otherwise specified and defined, the first feature “above” or “below” the second feature may include the direct contact of the first and second features or may include indirect contact of the first and second features through other medium therebetween. Moreover, the first feature being “above,” “on,” and “over” the second feature includes that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below,” “under,” and “beneath” the second feature includes that the first feature is directly under or obliquely under the second feature, or simply means that the first feature is lower in height than the second feature. 
     The present disclosure provides many various embodiments or examples to implement different structures of embodiments of the present disclosure. For simplicity, components and settings of specific examples are described below. The description is merely exemplary and does not intend to limit embodiments of the present disclosure. Reference numerals and/or letters are repeated in different examples in embodiments of the present disclosure for simplicity and clarity and do not indicate a relationship among various implementations and/or settings. Embodiments of the present disclosure provide examples of various specific processes and materials, but those of ordinary skill in the art may be aware of an application of other processes and/or use of other materials. 
     As shown in  FIG. 1 , a fixation structure  10  consistent with embodiments of the present disclosure is configured to connect a load to a gimbal. The fixation structure  10  includes a hot shoe plate  11 , a hot shoe rod assembly  12 , a locking assembly  13 , and a fixation assembly  15 . The hot shoe plate  11  includes a first end  11   a  and a second end  11   b  opposite to each other. A connection member  111  is arranged at the first end  11   a , and a sliding member  112  is arranged at the second end  11   b . The hot shoe rod assembly  12  includes a fixation rod  122  detachably arranged at the connection member  111 . The hot shoe rod assembly  12  may cause the hot shoe plate  11  to be fixed at different positions of the hot shoe rod assembly  12  by the detachable connection of the connection member  111 . The fixation rod  122  includes a top member  1221  and a bottom member  1222  opposite to each other. The bottom member  1222  may be configured to be connected to the gimbal. The locking assembly  13  may be configured to fix the hot shoe rod assembly  12  at the hot shoe plate  11 . The fixation assembly  15  may be configured to cooperate with the sliding member  112  to connect the load at any position of the sliding member  112 . 
     In some embodiments, the load may include a device for acquiring external information and news, such as a camera, a cell phone, a tablet, a sensor, etc. The gimbal may include a three-axis gimbal, a two-axis gimbal, or a single axis gimbal. When the load is connected to the gimbal, the gimbal may stabilize the load and change the orientation and angle of the load. In some embodiments, an example may be described by using a camera (including a single-lens reflex (SLR) camera, a video recorder, a card camera, a surveillance camera, or another electronic device with a photographing function) as the load and the three-axis gimbal. 
     During a process of mounting the fixation rod  122  at the connection member  111 , the fixation rod  122  may move along a direction perpendicular to a direction between the first end  11   a  and the second end  11   b , that is, along a first direction, until the fixation rod  122  has a suitable position relative to the connection member  111 . For example, the connection member  111  may be located at a position at half, one third, or one fourth of the length of the fixation rod  122 . Then, the hot shoe rod assembly  12  may be fixed at the hot shoe plate  11  by the locking assembly  13 . 
     During a process of connecting the load at the sliding member  112 , the fixation assembly  15  may slide with the load along a direction between the first end  11   a  and the second end  11   b , that is, along a second direction, until the fixation assembly  15  and the load may have a suitable position relative to the sliding member  112 . For example, the fixation assembly  15  and the load may be located at a half, one third, or one fourth of the length of the sliding member  112  along an extension direction. Then, the load may be fixed at the sliding member  112  by the fixation assembly  15 . The first direction may be perpendicular to the second direction. 
     In some embodiments, the fixation structure  10  may be connected to the gimbal by the hot shoe rod assembly  12  and to the load by the cooperation of the fixation assembly  15  and the sliding member  112  to cause the load to be firmly carried at the gimbal. When the load cannot be firmly carried at the gimbal, the fixation structure  10  may help to fix the load. In addition, since the fixation rod  122  may move along the first direction relative to the hot shoe plate  11 , the load may move along the second direction relative to the hot shoe plate  11 , and the gimbal may be connected to the bottom member  1222  of the fixation rod  122 , the load may move along the first direction, the second direction, or the first direction and the second direction relative to the gimbal to move the load to a suitable position of a center of gravity to be carried stably. 
     As shown in  FIG. 1  and  FIG. 2 , the fixation structure  10  consistent with embodiments of the present disclosure includes the hot shoe plate  11 , the hot shoe rod assembly  12 , the locking assembly  13 , a connection assembly  14 , and the fixation assembly  15 . 
     The shape of the hot shoe plate  11  may include a long strip. The hot shoe plate  11  includes the first end  11   a  and the second end  11   b  opposite to each other. That is, two ends of the long strip include the first end  11   a  and the second end  11   b , respectively. The connection member  111  is arranged at the first end  11   a . The sliding member  112  is arranged at the second end  11   b . The connection member  111  includes a through-hole  1111  or a blind hole. The sliding member  112  includes a sliding slot  1121 . 
     The hot shoe plate  11  includes an upper surface  113 , a lower surface  114 , and a side surface  115 . The upper surface  113  and the lower surface  114  are located at two sides of the hot shoe plate  11  opposite to each other. When the connection member  111  includes the through-hole  1111 , the through-hole  1111  extends from the upper surface  113  to the lower surface  114 . When the connection member  111  includes the blind hole, the blind hole may only penetrate the upper surface  113  or the lower surface  114 . A direction of a central axis of the through-hole  1111  or the blind hole is perpendicular to the upper surface  113  and the lower surface  114 . The sliding slot  1121  extends from the upper surface  113  to the lower surface  114 . An extension direction of the sliding slot  1121  includes the direction between the first end  11   a  and the second end  11   b . That is, the extension direction of the sliding slot  1121  includes the second direction. When the load is a camera, the extension direction of the sliding slot  1121  may be perpendicular to an optical axis of the camera. 
     A cold shoe groove  116  is arranged at the upper surface  113 . The cold shoe groove  116  may be configured to be connected to another device, such as a device with a male cold shoe of a microphone, a compensation light, etc. The cold shoe groove  116  is located between the first end  11   a  and the second end  11   b . One or a plurality of cold shoe grooves  116  may be included. When one cold shoe groove  116  is included, the cold shoe groove  116  is located at a center area between the first end  11   a  and the second end  11   b . When the plurality of (e.g., two, three, or four) cold shoe grooves  116  are included, the plurality of cold shoe grooves  116  may be distributed between the first end  11   a  and the second end  11   b  at an even interval. Since the cold shoe groove  116  is located in the center area between the first end  11   a  and the second end  11   b , or the plurality of cold shoe grooves  116  may be distributed between the first end  11   a  and the second end  11   b  at the even interval, an even force may be ensured for the hot shoe plate  11  when another device is connected to the cold shoe groove  116 . The cold shoe groove  116  includes an upper part  1161  and a lower part  1162  that are connected. An opening of the upper part  1161  may be smaller than an opening of the lower part  1162 . The cold shoe groove  116  may include a stepped groove formed by recessing the upper surface  113  toward the lower surface  114 . In some other embodiments, the cold shoe groove  116  may include a stepped groove formed by protruding from the upper surface  113  toward a direction away from the lower surface  114 . 
     At least one connection opening  117  is arranged at the upper surface  113 , for example, one, two, three, or four connection openings  117  may be arranged at the upper surface  113 . The connection opening  117  of the upper surface  113  is located between the connection member  111  and the cold shoe groove  116 , and/or between the cold shoe groove  116  and the sliding slot  112 . At least one connection opening  1163  is arranged on a bottom wall  15311  of the cold shoe groove  116 , for example, one, two, three, or four connection openings  1163  may be arranged on the bottom wall  15311  of the cold shoe groove  116 . The connection opening  117  of the upper surface  113  and the connection opening  1163  of the bottom wall  15311  of the cold shoe groove  116  may be configured to be connected to another device mechanically. Since the cold shoe groove  116  and the connection opening  117  are arranged at the upper surface  113 , and the connection opening  1163  is arranged on the bottom wall  15311  of the cold shoe groove  116 , the fixation structure  10  may provide a variety of extension interfaces to connect to another device needed during the operation of the load and reduce the workload of the interface of the load. The appearance structure may be simple. The hot shoe plate  11  further includes at least one position limiting member  118 , for example, a position limiting screw. The position limiting member  118  may be fixed at the upper surface  113  via a thread and provide a position limiting effect for other devices when needed. 
     The side surface  115  connects the upper surface  113  and the lower surface  114 . A locking hole  1151  is arranged at the side surface  115 . 
     The hot shoe rod assembly  12  includes a knob cover  121  and a fixation rod  122 . 
     The knob cover  121  includes a cover body  1211  and a connection rod  1212  extending from the cover body  1211 . An outer thread is arranged at the connection rod  1212 . The fixation rod  122  is detachably mounted to the connection member  111 . The fixation rod  122  includes a top member  1221  and a bottom member  1222  opposite to each other. The bottom member  1222  may be configured to be connected to the gimbal. The fixation rod  122  may include a hollow structure with the bottom member  1222  closed and an opening  12211  arranged at the top member  1221  to cause the weight of the hot shoe rod assembly  12  to be relatively light. 
     In some embodiments, the knob cover  121  is connected to the top member  1221  and shields the opening  12211 . An inner thread is arranged at the top member  1221 . The connection rod  1212  is inserted in the fixation rod  122 . The outer thread of the connection rod  1212  cooperates with the inner thread of the top member  1221  to connect the knob cover  121  and the fixation rod  122 . The outer thread of the connection rod  1212  and the inner thread of the top member  1221  are not exposed. The cover body  1211  shields the opening  12211  to prevent dust, water, or other material from entering the fixation rod  122  from the opening  12211 . 
     In some other embodiments, the hot shoe rod assembly  12  further includes an extension rod  123 . The extension rod  123  may be configured to provide an extension function when the length of the fixation rod  122  cannot meet the requirement. The extension rod  123  includes a connection end  1231  and an opening end  1232  opposite to each other. The connection end  1231  is connected to the top member  1221  and shields the opening  12211 . The knob cover  121  is connected to the opening end  1232  and shields the opening end  1232 . The inner thread is arranged at the top member  1221 . The outer thread is arranged at the connection end  1231 . The outer thread of the connection end  1231  and the inner thread of the top member  1221  may cooperate to connect the extension rod  123  and the fixation rod  122 . The outer thread of the connection end  1231  and the inner thread of the top member  1221  are not exposed. An inner thread is arranged at the opening end  1232 . The connection rod  1212  is inserted in the fixation rod  122 . The outer thread of the connection rod  1212  and the inner thread of the opening end  1232  may cooperate to connect the knob cover  121  and the extension rod  123 . The outer thread of the connection rod  1212  and the inner thread of the opening end  1232  are not exposed. The knob cover  1211  shields the opening end  1232  to prevent dust, water, or another substance from entering the extension rod  123  through the opening end  1232 . 
     The fixation rod  122  and the extension rod  123  may be formed of an aluminum alloy material. The aluminum alloy material may have a small density and high strength, may be beneficial to ensure the strength and safety of the connection of the load and the gimbal, and may not increase the weight excessively. 
     When the hot shoe rod assembly  12  includes the knob cover  121  and the fixation rod  122 , or the knob cover  121 , the fixation rod  122 , and the extension rod  123 , a connection hole  12221  is arranged at the bottom member  1222  of the fixation rod  122  to connect an arm of the gimbal. When the load includes a camera, the central axis of the connection hole  12221  may be perpendicular to the optical axis of the camera. 
     In some other embodiments, a relative position relationship of the fixation rod  122  and the extension rod  123  may be exchanged along the first direction, or the hot shoe rod assembly  12  may include one fixation rod  122  and a plurality of extension rods  123 , or a plurality of fixation rods  122  and one extension rod  123 , or the plurality of fixation rods  122  and the plurality of extension rods  123 . 
     As shown in  FIG. 2 ,  FIG. 3 , and  FIG. 6 , the locking assembly  13  is configured to fix the hot shoe rod assembly  12  at the hot shoe plate  11 . The locking assembly  13  includes a locking part  131 , a locking knob  132 , a locking gasket  133 , a locking screw  134 , and a locking elastic member  135 . 
     The locking part  131  passes through and is locked in the locking hole  1151  to fix the hot shoe rod assembly  12  at the hot shoe plate  11 . In some embodiments, the locking part  131  may be a locking threaded rod, including a locking end  1311  passing through the locking hole  1151  and a knob end  1312  opposite to the locking end  1311 . The locking knob  132  is fixed at the knob end  1312  opposite to the side surface  115 . The locking part  131  further includes an abutting member  1313  located at the knob end  1312 . A stepped through-hole  1321  is arranged at the locking knob  132 . The abutting member  1313  is inserted in the stepped through-hole  1321  from a side of the locking knob  132 . The locking screw  134  is inserted in the stepped through-hole  1321  from another side of the locking knob  132  to be screwed with the locking part  131 . The locking elastic member  135  is accommodated in the stepped through-hole  1321  and sleeved at the locking part  131 . An end of the locking elastic member  135  is coupled to the step of the stepped through-hole  1321 , and another end of the locking elastic member  135  is coupled to the locking screw  134 . The locking elastic member  135  may include a spring. The locking gasket  133  is sleeved at the locking part  131  and located between the abutting member  1313  and the side surface  115 . The locking gasket  133  may include a ring-shaped gasket. The locking gasket  133  may include a wear-resistant material, for example, polyoxymethylene (POM), high carbon steel, cast iron, diamond, etc. 
     In some embodiments, the locking hole  1151  corresponds to and communicates with the through-hole  1111 . The locking part  131  passes through the locking hole  1151  to be connected to the fixation rod  122 . 
     In some other embodiments, the connection member  111  includes a first locking member  1112  and a second locking member  1113  arranged at an interval. The fixation rod  122  is inserted in the through-hole  1111  and is clamped by the first locking member  1112  and the second locking member  1113 . A distance between the first locking member  1112  and the second locking member  1113  may be adjusted to change a clamping force applied to the fixation rod  122 . The through-hole  1111  includes an accommodation section  11111 , a connection section  11112 , and a through section  11113 . The fixation rod  122  passes through and is arranged in the accommodation section  11111 . The connection section  11112  connects the accommodation section  11111  and the through section  11113 . The through section  11113  passes through the side surface  115 . The through-hole  1111  divides the connection member  111  into the first locking member  1112  and the second locking member  1113 . The locking hole  1151  corresponds to the connection section  11112  and includes a first sub locking hole  11511  and a second sub locking hole  11512 . The first sub locking hole  11511  passes through the first locking member  1112 . The second sub locking hole  11512  is arranged at the second locking member  1113  and is aligned with the first sub locking hole  11511 . The locking part  131  passes through the first sub locking hole  11511  and the connection section  11112  and is locked in the second sub locking hole  11512 . 
     In connection with  FIG. 5 , the connection assembly  14  cooperates with the connection hole  12221  and is configured to be connected to the arm of the gimbal. in some embodiments, the connection assembly  14  passes through the connection hole and the opening of a pitch axis of the gimbal in sequence to cause the hot shoe rod assembly  12  to be connected to the gimbal. 
     As shown in  FIG. 2 ,  FIG. 4 ,  FIG. 7 , and  FIG. 8 , the fixation assembly  15  cooperates with the sliding member  112  to connect the load to any position of the sliding member  112 . The fixation assembly  15  includes an adjustment knob  151 , an adjustment threaded rod  152 , an upper fixation block  153 , a lower fixation block  154 , a fixation gasket  155 , a fastening member  156 , and a fixation elastic member  157 . 
     The adjustment knob  151  is arranged at the upper surface  113 . The adjustment knob  151  includes a top surface  1511 , a bottom surface  1512 , and a side surface  1513  connecting the top surface  1511  and the bottom surface  1512 . The bottom surface  1512  faces the upper surface  113 . A groove is arranged at the bottom surface  1512 . A side hole  1514  communicating with the groove is arranged at the side surface  1513 . 
     The adjustment threaded rod  152  is fixedly connected to the adjustment knob  151 . The adjustment threaded rod  152  passes through the sliding slot  1121 . The adjustment threaded rod  152  includes a rod body  1521  and a blocking member  1522 . The blocking member  1522  is located at an end of the rod body  1521  away from the adjustment knob  151 . An end of the rod body  1521  away from the blocking member  1522  is accommodated in the groove. The fastening member  156  passes through the side hole  1514  and is fixedly connected to the rod body  1521 . In some embodiments, the fastening member  156  may abut directly a portion of the rod body  1521  inserted in the groove to cause the adjustment threaded rod  152  to be fixedly connected to the adjustment knob  151 . In some other embodiments, an inner thread may be arranged at the portion of the rod body  1521  inserted in the groove, and an external thread may be arranged at the fastening member  156 . The outer thread of the fastening member  156  and the inner thread of the rod body  1521  may cooperate to cause the adjustment threaded rod  152  to be fixedly connected to the adjustment knob  151 . 
     The upper fixation block  153  is arranged on a side where the lower surface  114  is located. The adjustment threaded rod  152  passes through the upper fixation block  153 . An upper recess  1531  is arranged at the upper fixation block  153 . At least one connection opening  15321  is arranged on a sidewall  1532  of the upper fixation block  153 , for example, one, two, three, or four connection openings  15321 . The connection opening  15321  is configured to mechanically connect another device, for example, a fixation rod of a follow focus motor. Since at least one connection opening  15321  is arranged on the sidewall  1532  of the upper fixation block  153 , the fixation structure  10  may provide a variety of extension interfaces to connect the another device needed during the operation of the load and reduce the workload of the interface of the load. 
     The lower fixation block  154  is arranged on the side where the lower surface  114  is located. The lower fixation block  154  passes through the upper fixation block  153 . The adjustment threaded rod  152  passes through the upper fixation block  153  to be screwed with the lower fixation block  154 . The blocking member  1522  blocks the lower fixation block  154 . In some embodiments, the lower fixation block  154  includes a body  1541  and a protrusion  1542 , which extends from both sides of the body  1541 . The protrusion  1542  cooperates with the hot shoe groove of the load to fix the load. The body  1541  is accommodated in the upper recess  1531 . The body  1541  includes a first surface  15411  and a second surface  15412  opposite to each other. The first surface  15411  is located in the upper recess  1531 . The first surface  15411  is recessed toward the second surface  15412  to form an accommodation groove  15413 . The second surface  15412  is recessed toward the first surface  15412  to form a lower recess  1543 . The blocking member  1522  abuts the bottom wall  15311  of the lower recess  1543 . 
     The fixation gasket  155  is sleeved at the adjustment threaded rod  152  and is clamped between the adjustment knob  151  and the upper surface  113 . The fixation gasket  155  may include a ring-shaped gasket. The fixation gasket  155  may include a wear-resistant material, for example, POM, high carbon steel, cast iron, diamond, etc. 
     An end of the fixation elastic member  157  is coupled to the upper fixation block  153 . Another end of the fixation elastic member  157  is coupled to the lower fixation block  154 . In some embodiments, the fixation elastic member  157  is accommodated n the accommodation groove  15413 . An end of the fixation elastic member  157  is coupled to the bottom wall  15311  of the upper recess  1531 . Another end of the fixation elastic member  157  is coupled to the bottom wall of the accommodation groove  15413 . The fixation elastic member  157  may include a spring, which is configured to provide a pre-tension between the lower fixation block  154  and the upper fixation block  153 . A plurality of fixation elastic members  157  may be included. The plurality of fixation elastic members  157  may be distributed evenly around the adjustment threaded rod  152 . For example, two fixation elastic members  157  may be included. Then, two accommodation grooves  15413  may be included. The two fixation elastic members  157  may evenly provide a pre-tension between the lower fixation block  154  and the upper fixation block  153 . 
     During mounting, the adjustment threaded rod  152  is fixedly connected to the adjustment knob  151  by the fastening member  156 . The adjustment knob  151  may rotate to drive the adjustment threaded rod  152  to rotate. The adjustment threaded rod  152  may rotate to cause the lower fixation block  154  to move along the rod body  1521  with the limitation of the upper fixation block  153 . For example, when the adjustment threaded rod  152  is rotated clockwise, the lower fixation block  154  may move downward along the rod body  1521 . When the adjustment threaded rod  152  is rotated counterclockwise, the lower fixation block  154  may move upward along the rod body  1521 . As such, the hot shoe grooves of different loads may be connected by adjusting the position of the lower fixation block  154  at the rod body  1521 . 
     In some other embodiments, a blocking member  1522  may not be arranged at the adjustment threaded rod  152 . The adjustment knob  151  and the adjustment threaded rod  152  may be an integral structure. The lower fixation block  154  may be coupled to the hot shoe groove of the load first. Then, the adjustment knob  151  may be rotated to tightly rotate the adjustment threaded rod  152  and the lower fixation block  154 . 
     Embodiments of the present disclosure further provide a gimbal system. The gimbal system includes a gimbal, a load, and the fixation structure  10 . The fixation structure  10  may be configured to connect the load to the gimbal. 
     The gimbal system consistent with embodiments of the present disclosure may be connected to the gimbal through the hot shoe rod assembly  12 . The fixation assembly  15  and the sliding member  112  may cooperate to connect the load to cause the load to be stably carried by the gimbal. 
     In the description of this specification, referring to the terms “certain embodiments,” “one embodiment,” “some embodiments,” “exemplary embodiments,” “examples,” “specific examples,” or “some examples,” the description means that specific features, structures, materials, or characteristics described in connection with embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic description of the above terms does not necessarily refer to a same embodiment or example. The described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. 
     Although embodiments of the present disclosure have been shown and described above, embodiments are exemplary and should not be understood as limiting the present disclosure. Those of ordinary skill in the art may perform modifications, changes, replacements, and variations on embodiments within the scope of the present disclosure. The scope of the present invention is defined by the claims and their equivalents.