CN220436077U - Photographic support device and middle shaft thereof - Google Patents

Abstract

The utility model relates to a photographic support device and a middle shaft thereof, wherein the middle shaft comprises a first shaft section and a second shaft section, and the first shaft section is provided with a first threaded connection part; the second shaft section is provided with a second threaded connection part and a jackscrew, the second threaded connection part is in threaded connection with the first threaded connection part so as to realize the axial splicing of the first shaft section and the second shaft section along the central shaft, the jackscrew can be screwed to be abutted against the second threaded connection part, and the jackscrew can also be unscrewed so as to weaken or eliminate the abutting force of the jackscrew on the second threaded connection part; when the jackscrew is unscrewed, the second threaded connecting part and the first threaded connecting part can synchronously rotate relative to the second shaft section; when the jackscrew is screwed down, the second threaded connection part can rotate relative to the first threaded connection part so as to be detached from the first threaded connection part. The photographing support device and the shaft thereof can not only meet the photographing requirements of multiple occasions in the use process, but also effectively prevent users from mistakenly disassembling the two sections of shafts due to mistaken touch.

Description

Photographic support device and middle shaft thereof

Technical Field

The present utility model relates to a tripod, and more particularly to a photographing support device and a shaft thereof.

Background

Usually, the skill shooting in daily life is kept away from help of a photographic foot rest, and the foot rest has a non-negligible effect on professional users and amateur users, and is mainly used for stabilizing a camera, the photographic foot rest is generally provided with a central shaft for installing photographic equipment, the central shaft can stabilize the shooting angle of the photographic equipment and the gravity center of the photographic foot rest is relatively centered, so that toppling is avoided. In order to use the central shaft for multiple scenes, most of the central shafts of the traditional photographic foot rest are composed of two sections, and the two sections of central shafts are axially spliced to change the axial length of the whole central shaft, so that the shooting use requirements of multiple scenes are met. However, most of the two sections of middle shafts are connected in a threaded or clamping manner, so that users can easily cause the mistaken disassembly of the threaded or clamping connection of the two sections of middle shafts due to mistaken touch in the use process, and a lot of inconvenience is brought to the shooting process.

Disclosure of Invention

The utility model provides a photographic support device and a photographic support shaft, which are used for solving the problem that the photographic support shaft is easy to disassemble due to false touch in the use process.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a bottom bracket, comprising:

a first shaft section provided with a first threaded connection;

the second shaft section is provided with a second threaded connection part and a jackscrew, the second threaded connection part is in threaded connection with the first threaded connection part so as to realize the axial splicing of the first shaft section and the second shaft section along the central shaft, the jackscrew can be screwed to be abutted against the second threaded connection part, and the jackscrew can also be unscrewed so as to weaken or eliminate the abutting force of the jackscrew on the second threaded connection part;

when the jackscrew is unscrewed, the second threaded connection part and the first threaded connection part can synchronously rotate relative to the second shaft section; when the jackscrew is screwed down, the second threaded connection part can rotate relative to the first threaded connection part so as to be detached from the first threaded connection part.

In one embodiment, the second shaft section is provided with an axially extending mounting hole, and the side wall of the second shaft section is provided with a movable hole communicated with the mounting hole; the second threaded connection part is arranged in the mounting hole, and the jackscrew moves in the moving hole.

In one embodiment, the movable hole is a threaded hole, the jackscrew is threaded through the threaded hole, and the jackscrew is in threaded connection with the second shaft section.

In one embodiment, the jackscrew is completely embedded in the movable hole, and a non-circular screwing groove is formed in one side of the jackscrew, which faces away from the second threaded connection portion.

In one embodiment, the first shaft section and the second shaft section are provided with a plurality of outer wall surfaces which are circumferentially arranged and are arranged at an included angle, two adjacent outer wall surfaces in the same shaft section are intersected to form an axially extending convex rib, and the movable hole penetrates through the convex rib along the radial direction; when the first shaft section is spliced with the second shaft section, the outer wall surface of the first shaft section is axially aligned with the outer wall surface of the second shaft section, and the rib of the first shaft section is axially aligned with the rib of the second shaft section.

In one embodiment, one of the connecting end surfaces of the first shaft section and the second shaft section is provided with a groove, the other one is provided with a protrusion capable of being embedded in the groove, when the protrusion is embedded in the groove, the outer wall surface of the first shaft section is axially aligned with the outer wall surface of the second shaft section, and the convex edge of the first shaft section is axially aligned with the convex edge of the second shaft section.

In one embodiment, the second threaded connection has a first end proximal to the first threaded connection and a second end distal to the first threaded connection, an outer wall of the first end is provided with an external thread, an inner wall of the mounting hole is provided with an internal thread, and the first end is movable away from the first threaded connection such that the external thread engages the internal thread.

In one embodiment, the middle shaft further comprises a switching structure for installing shooting equipment, the switching structure is connected with the end part, far away from the first threaded connection part, of the second threaded connection part, and the switching structure and the second threaded connection part can synchronously rotate; the adapter structure protrudes out of the second shaft section for a user to grasp to operate its rotation.

In one embodiment, the middle shaft further comprises a ball head, and the switching structure comprises a switching shaft and a ball head, and the switching shaft is arranged between the second threaded connection part and the ball head.

In one embodiment, the middle shaft further comprises a third threaded connection portion, the third threaded connection portion penetrates through the adapter shaft and is in threaded connection with the second threaded connection portion, and the adapter shaft is clamped between the third threaded connection portion and the second threaded connection portion.

The utility model also provides a photographic support device, comprising:

a mounting base;

the support legs are connected with the mounting seat and are arranged at an included angle along the circumferential direction;

the middle shaft is arranged in the mounting seat in a penetrating way, and the first shaft section and the second shaft section which are detached can be independently mounted on the mounting seat.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the photographing support device and the photographing support shaft provided by the embodiment of the utility model not only can adapt to photographing requirements of multiple occasions in the use process, but also can effectively prevent users from easily and mistakenly disassembling two sections of the central shaft through threaded connection due to mistaken touch, thereby bringing convenience to the photographing process and bringing good user experience.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a shaft according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the bottom bracket of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a second shaft section of the bottom bracket shown in FIG. 1;

FIG. 4 is a right side elevational view of the top wire of the bottom bracket shown in FIG. 3;

FIG. 5 is a schematic view of the outer wall surface and ribs of the bottom bracket shown in FIG. 1;

FIG. 6 is a schematic view of the configuration of the connecting surface groove of the first shaft section of the bottom bracket shown in FIG. 1;

FIG. 7 is a schematic cross-sectional view of a second shaft section, adapter shaft, third threaded connection and ball head of the bottom bracket of FIG. 1;

FIG. 8 is a schematic view of an exploded configuration of a second shaft section, adapter shaft, third threaded connection and ball head of the bottom bracket shown in FIG. 1;

FIG. 9 is a schematic view of an exploded view of a first shaft section of the bottom bracket shown in FIG. 1;

FIG. 10 is a schematic cross-sectional view of a first shaft section of the bottom bracket shown in FIG. 1;

FIG. 11 is a schematic view of a high-angle shooting structure of the photographing support device of the present utility model;

fig. 12 is a schematic view of a low-angle shooting structure of the photographing support device of the present utility model.

The reference numerals are explained as follows:

10. a center shaft; 100. a first shaft section; 110. a first threaded connection; 120. a fourth threaded connection; 130. a third end; 140. a fourth end; 150. a hook; 160. a groove; 200. a second shaft section; 210. a second threaded connection; 211. a first end; 212. a second end; 220. a jackscrew; the method comprises the steps of carrying out a first treatment on the surface of the 223. A screwing groove; 230. a mounting hole; 240. a movable hole; 250. a protrusion; 300. an outer wall surface; 310. a rib; 400. a switching structure; 410. a transfer shaft; 420. ball head; 500. a third threaded connection; the method comprises the steps of carrying out a first treatment on the surface of the 20. A photographing support device; 30. a mounting base; 40. and (5) supporting legs.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, the present utility model provides a center shaft 10 for connecting a photographing device and a tripod, wherein the center shaft can stabilize a photographing angle of the photographing device and center a center of gravity of the tripod, so as to avoid tilting. The center shaft 10 is matched with a photographing foot rest for photographing, so that photographing use requirements of multiple scenes can be met, and the situation that a user mistakenly touches the center shaft to cause mistaken disassembly of two sections of center shafts in threaded connection in the use process can be avoided.

The middle shaft 10 comprises a first shaft section 100 and a second shaft section 200, the shooting at a higher height can be realized by axially splicing the first shaft section 100 and the second shaft section 200, the shooting at a lower height can be realized by assembling the second shaft section 200 separated from the first shaft section 100 on a tripod, and shooting requirements of multiple scenes can be adapted.

Referring to fig. 2, the first shaft segment 100 is provided with a first screw connection portion 110, the second shaft segment 200 is provided with a second screw connection portion 210 and a top thread 220, the second screw connection portion 210 is screw-connected with the first screw connection portion 110 to achieve axial splicing of the first shaft segment 100 and the second shaft segment 200, the top thread 220 can be screwed to abut against the second screw connection portion 210, and the top thread 220 can also be unscrewed to weaken or eliminate an abutment force of the top thread 220 against the second screw connection portion 210.

When the jackscrew 220 is unscrewed, the second threaded connection portion 210 and the first threaded connection portion 110 can rotate synchronously relative to the second shaft section 200; when the jackscrew 220 is screwed down, the second threaded connection 210 can rotate relative to the first threaded connection 110 to detach from the first threaded connection 110 to detach the first shaft section 100 and the second shaft section 200.

In the process of using the middle shaft 10, the shooting requirements of multiple occasions can be met, the situation that users easily mistakenly detach two sections of middle shafts through threaded connection due to mistaken touch can be effectively prevented, convenience is brought to the shooting process, and user experience is good.

Referring to fig. 3, the second shaft section 200 is provided with an axially extending mounting hole 230, the second threaded connection portion 210 is disposed in the mounting hole 230, the second threaded connection portion 210 is capable of sliding relative to the second shaft section 200 within the mounting hole 230, a movable hole 240 communicating with the mounting hole 230 is provided on a side wall of the second shaft section 200, threads are provided on an inner wall of the movable hole 240, the movable hole 240 is a threaded hole, the jackscrew 220 is threaded through the movable hole 240, and the jackscrew 220 is completely embedded in the movable hole 240. The jackscrew 220 is in threaded connection with the second shaft section 200, and the jackscrew 220 is completely embedded into the movable hole 240, so that the structure is compact, and the situation that a user unscrews the jackscrew 220 due to false touch when installing or dismantling the first shaft section 100 and the second shaft section 200, and the jackscrew 220 needs to be unscrewed again to install or dismantle the first shaft section 100 and the second shaft section 200 can be prevented. And the jackscrew 220 is fully inserted into the movable bore 240, it is also ensured that the outer surface of the second shaft section 200 is not obtrusive. It should be appreciated that in other embodiments, the movable aperture 240 may be configured as a non-threaded aperture, so long as it is ensured that the jackscrew 220 is movably disposed within the movable aperture 240 toward and away from the second shaft segment 200.

Referring to fig. 4, a non-circular screwing groove 223 is provided on a side of the top thread 220 facing away from the second screw connection portion 210, and when unscrewing or screwing the top thread 220, a wrench is inserted into the movable hole 240, and is inserted into the screwing groove 223 and abuts against the top thread 220, so that the top thread 220 can be unscrewed or screwed.

Referring to fig. 5, the first shaft section 100 and the second shaft section 200 each have a plurality of outer wall surfaces 300 arranged along a circumferential direction and disposed at an included angle, two adjacent outer wall surfaces 300 in the same shaft section 100 intersect to form an axially extending rib 310, and the movable hole 240 is radially penetrating the rib 310; when the first shaft section 100 is spliced with the second shaft section 200, the outer wall surface 300 of the first shaft section 100 is axially aligned with the outer wall surface 300 of the second shaft section 200, and the rib 310 of the first shaft section 100 is axially aligned with the rib 310 of the second shaft section 200. The movable hole 240 is formed to penetrate the rib 310 in the radial direction, and the top thread 220 provided in the movable hole 240 may be formed as a long top thread 220, so that the top thread 220 is convenient to be received when the top thread 220 is screwed out. If the movable hole 240 is formed in the outer wall 300, the distance between the outer wall 300 and the second threaded portion 210 is smaller than the distance between the protrusion 310 and the second threaded portion 210, the jackscrew 220 can be formed only as a shorter jackscrew 220, and the shorter jackscrew 220 is not easy to be stored and lost.

One of the connecting end surfaces of the first shaft section 100 and the second shaft section 200 is provided with a groove 160, the other is provided with a protrusion 250 capable of being inserted into the groove 160, for example, fig. 6 and 7, the connecting end surface of the first shaft section 100 is provided with the groove 160, the connecting end surface of the second shaft section 200 is provided with the protrusion 250, when the protrusion 250 is inserted into the groove 160, the outer wall surface of the first shaft section 100 is axially aligned with the outer wall surface of the second shaft section 200, and the convex edge 310 of the first shaft section 100 is axially aligned with the convex edge 310 of the second shaft section 200. The groove 160 or the protrusion 250 is arranged on the connecting end surface of the first shaft section 100 and the second shaft section 200, when a user axially splices the first shaft section 100 and the second shaft section 200, the groove 160 and the protrusion 250 are mutually clamped to form a limit, so that the convex edge 310 of the first shaft section 100 and the convex edge 310 of the second shaft section 200 can be effectively aligned when the first threaded connection part 110 and the second threaded connection part 210 are connected, and the groove 160 and the protrusion 250 are arranged, so that the friction force between the first shaft section 100 and the second shaft section 200 is increased, and the false disassembly of the user in the process of using the shaft 10 can be effectively prevented. It will be appreciated that the recess 160 and the protrusion 250 may not be provided when the central shaft 10 is used without the ball head 420, so long as the axial splicing of the first shaft section 100 and the second shaft section 200 is achieved.

Referring to fig. 7, the second threaded connection 210 has a first end 211 near the first threaded connection 110 and a second end 212 far from the first threaded connection 110, the first end 211 having a radial dimension greater than that of the mounting hole 230, the center shaft 10 further includes an adapter 400 for mounting the photographing apparatus, the adapter 400 is detachably connected to the second end 212, the adapter 400 is connected to the second end 212 at an end having a radial dimension greater than that of the mounting hole 230, and the second threaded connection 210 is axially limited to the mounting hole 230 such that the second threaded connection 210 cannot be separated from the second shaft section 200. The adaptor structure 400 and the second threaded connection 210 can rotate synchronously, and the adaptor structure 400 protrudes out of the second shaft section 200 for the user to grasp and operate the rotation thereof. The outer wall of the first end 211 is provided with an external thread, and the inner wall of the mounting hole 230 is provided with an internal thread, and the first end 211 can be screwed with the mounting hole 230, so that the rotation of the second threaded connection 210 relative to the second shaft section 200 is limited. The second shaft section 200 is connected with the adapting structure 400, and can be mounted on a tripod for a user to use low-angle photography, when the user needs low-angle photography, the user connects the adapting structure 400 to the second shaft section 200, and screws the jackscrew 220 after connecting the first end 211 with the mounting hole 230, so that the relative rotation between the second threaded connection portion 210 and the second shaft section 200 can be limited, and the relative rotation between the adapting structure 400 and the second threaded connection portion 210 is limited, and the user can install photographing equipment at this time and photograph.

Referring to fig. 7 and 8, the adaptor structure 400 includes an adaptor shaft 410 and a ball head 420, wherein the adaptor shaft 410 is disposed between the second threaded connection portion 210 and the ball head 420, and the ball head 420 is rotatably connected with the photographing apparatus to adjust a photographing angle of the photographing apparatus. When a user uses the middle shaft 10 with the ball head 420, the ball head 420 and the second threaded connection part 210 are connected through the third threaded connection part 500, then the second threaded connection part 210 and the first threaded connection part 110 are connected to realize the axial splicing of the first shaft section 100 and the second shaft section 200, and then the jackscrew 220 is screwed to be abutted against the second threaded connection part 210 so as to prevent the false disassembly in the photographing process; when the user uses the middle shaft 10 to detach, the jackscrew 220 is unscrewed first, so that the first threaded connection part 110, the second threaded connection part 210 and the adapter shaft 410 can rotate relative to the second shaft section 200, the user holds the first shaft section 100 and the ball head 420 with two hands respectively, and then unscrews the first threaded connection part 110 and the second threaded connection part 210, so that the first shaft section 100 and the second shaft section 200 can be detached. It should be noted that, the ball head 420 may also be configured as a threaded hole, a quick-mounting plate, etc., so long as the adaptor structure 400 can be externally connected to the photographing device.

The bottom bracket 10 further includes a third threaded connection 500, where the third threaded connection 500 is threaded through the adapter shaft 410 and is connected to the second end 212, and the adapter shaft 410 is clamped between the third threaded connection 500 and the second end 212.

Referring to fig. 9 and 10, the first shaft section 100 is further provided with a fourth threaded connection 120, the fourth threaded connection 120 is sleeved on the first threaded connection 110, and the fourth threaded connection 120 can move axially relative to the first threaded connection 110 to switch between a first state and a second state; when the first threaded connection portion 110 is protruded from the fourth threaded connection portion 120, the first threaded connection portion 110 can be connected with the second threaded connection portion 210, and when the fourth threaded connection portion 120 is protruded from the first threaded connection portion 110, the fourth threaded connection portion 120 can be externally connected with a photographing apparatus. The first shaft section 100 can be externally connected with different shooting equipment, so that the problem that two sections of middle shafts can only be used in a matched mode or one shaft section can be installed on a shooting foot stool for use and has a single function is solved. The first shaft section 100 can be used with the second shaft section 200, and can be connected with other photographing devices to be mounted on a tripod.

The first shaft section 100 has a third end 130 close to the second threaded connection 210 and a fourth end 140 far away from the second threaded connection 210, the first threaded connection 110 and the fourth threaded connection 120 are both disposed at the third end 130 of the first shaft section 100, the fourth end 140 of the first shaft section 100 is provided with a hook 150, the hook 150 is detachably connected with the first shaft section 100, and the hook 150 is used for mounting a weight. The hanger 150 is used to mount a weight, and also to prevent the bottom bracket 10 from being detached from the tripod.

Referring to fig. 11 and 12, the present utility model further provides a photographing support device 20, including a mounting base 30, a plurality of support legs 40 and the central shaft 10, wherein the plurality of support legs 40 are connected with the mounting base 30, the plurality of support legs 40 are disposed at an included angle along a circumferential direction, the central shaft 10 is disposed through the mounting base 30, when high-angle photographing is required, the first shaft section 100 and the second shaft section 200 are spliced axially, and the first shaft section 100 is mounted on the mounting base 30, so that high-angle photographing can be realized; when low-angle shooting is required, the second shaft section 200 is detached from the first shaft section 100, and the second shaft section 200 is mounted on the mounting seat 30, so that low-angle shooting can be realized, and shooting requirements of multiple scenes can be adapted.

When the user uses the photographing support device 20, if photographing at a high angle is required, the screw 220 is first screwed with a wrench so that the screw 220 can abut against the second screw connection portion 210; the first shaft section 100 is then mounted to the second shaft section 200, connecting the first threaded connection 110 to the second threaded connection 210; the top thread 220 is unscrewed by a wrench, so that the middle shaft 10 is prevented from being disassembled by a user in the using process; finally, the connected center shaft 10 is installed on the installation seat 30, and then shooting equipment is installed, so that high-angle shooting can be realized. If the low angle photographing is required, the first shaft section 100 and the second shaft section 200 are not required to be connected, and only the second shaft section 200 is required to be mounted on the mounting seat 30, and then the photographing apparatus is mounted, so that the low angle photographing can be realized.

After the user finishes high-angle shooting, the shooting equipment is detached from the central shaft 10, then the central shaft 10 is detached from the mounting seat 30, then the jackscrew 220 is screwed by a wrench to enable the jackscrew 220 to limit the rotation of the second threaded connection part 210, and then the first shaft section 100 and the second shaft section 200 are detached, so that the shooting support device 20 can be detached. After the user finishes the low-angle shooting, the shooting device is detached from the second shaft section 200, and then the second shaft section 200 is detached from the mounting seat 30, so that the shooting support device 20 can be detached.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (11)

1. A bottom bracket, comprising:

a first shaft section provided with a first threaded connection;

the second shaft section is provided with a second threaded connection part and a jackscrew, the second threaded connection part is in threaded connection with the first threaded connection part so as to realize the axial splicing of the first shaft section and the second shaft section along the central shaft, the jackscrew can be screwed to be abutted against the second threaded connection part, and the jackscrew can also be unscrewed so as to weaken or eliminate the abutting force of the jackscrew on the second threaded connection part;

when the jackscrew is unscrewed, the second threaded connection part and the first threaded connection part can synchronously rotate relative to the second shaft section; when the jackscrew is screwed down, the second threaded connection part can rotate relative to the first threaded connection part so as to be detached from the first threaded connection part.

2. The bottom bracket according to claim 1, wherein the second shaft section is provided with an axially extending mounting hole, and the side wall of the second shaft section is provided with a movable hole communicating with the mounting hole;

the second threaded connection part is arranged in the mounting hole, and the jackscrew moves in the moving hole.

3. The bottom bracket according to claim 2, wherein the movable hole is a threaded hole, the jackscrew is threaded through the threaded hole, and the jackscrew is threaded with the second shaft section.

4. The bottom bracket according to claim 2, wherein the jackscrew is fully inserted into the movable hole, and a non-circular screwing groove is formed in a side of the jackscrew facing away from the second threaded connection portion.

5. The bottom bracket according to claim 2, wherein the first shaft section and the second shaft section are provided with a plurality of outer wall surfaces which are circumferentially arranged and are arranged at an included angle, two adjacent outer wall surfaces in the same shaft section are intersected to form an axially extending convex rib, and the movable hole penetrates through the convex rib along the radial direction; when the first shaft section is spliced with the second shaft section, the outer wall surface of the first shaft section is axially aligned with the outer wall surface of the second shaft section, and the rib of the first shaft section is axially aligned with the rib of the second shaft section.

6. The bottom bracket according to claim 5, wherein one of the connecting end surfaces of the first and second shaft segments is provided with a groove, the other is provided with a protrusion capable of being embedded in the groove, when the protrusion is embedded in the groove, the outer wall surface of the first shaft segment is axially aligned with the outer wall surface of the second shaft segment, and the protruding ridge of the first shaft segment is axially aligned with the protruding ridge of the second shaft segment.

7. The bottom bracket according to claim 2, wherein the second threaded connection has a first end proximal to the first threaded connection and a second end distal from the first threaded connection, an outer wall of the first end is provided with external threads, an inner wall of the mounting hole is provided with internal threads, and the first end is movable away from the first threaded connection to engage the external threads with the internal threads.

8. The bottom bracket according to claim 1, further comprising an adapter structure for mounting a photographing device, the adapter structure being connected to an end of the second threaded connection portion remote from the first threaded connection portion, and the adapter structure being rotatable in synchronization with the second threaded connection portion; the adapter structure protrudes out of the second shaft section for a user to grasp to operate its rotation.

9. The bottom bracket according to claim 8, wherein the adapter structure includes an adapter shaft and a ball head, the adapter shaft being disposed between the second threaded connection and the ball head.

10. The bottom bracket according to claim 9, further comprising a third threaded connection passing through the adapter shaft and threadably connected to the second threaded connection, the adapter shaft being clamped between the third threaded connection and the second threaded connection.

11. A photographic support apparatus, comprising:

a mounting base;

the support legs are connected with the mounting seat and are arranged at an included angle along the circumferential direction;

the bottom bracket according to any one of claims 1 to 10, being threaded into said mounting base, said first and second detached shaft sections being capable of being individually mounted to said mounting base.