CN216280154U - Tripod middle shaft adjusting device - Google Patents

Abstract

The utility model provides a tripod middle shaft adjusting device which comprises a three-cutting seat, a rotating assembly, a middle shaft assembly and a telescopic fixing assembly, wherein the three-cutting seat is provided with a first cutting hole and a second cutting hole; the rotating assembly is arranged on the three cutting seats; the middle shaft assembly and the telescopic fixing assembly are both arranged on the rotating assembly; one end of the telescopic fixing component penetrates through the rotating component and then is abutted against the middle shaft component. One end of a rotary shaft of the rotary component is rotatably arranged on the fixed first support, so that the rotary center of the rotary shaft cannot deviate all the time, and the stability and the accuracy in the middle shaft angle adjusting process and the returning process are guaranteed. The tooth surface matching and the matching between the knob and the rotating shaft are arranged on the locking ring, so that the angle adjustment of the middle shaft has controllability and flexibility. Through the cooperation between the safety component arranged at the bottom of the middle shaft and the locking glue, double safety is formed, and the condition that a user excessively pulls off the middle shaft instantly with force to damage photographic equipment can be effectively avoided.

Description

Tripod middle shaft adjusting device

Technical Field

The utility model relates to the technical field of tripods, in particular to a tripod center shaft adjusting device.

Background

The tripod is a support frame used for stabilizing the shooting equipment, and in order to reach better shooting effect, the tripod is provided with the axis usually, and the axis can move the position on the axis at place, adjusts the height of shooing, also can rotate in the plane, adjusts the angle of shooing to satisfy more demands of shooing of user.

At present, the angle of a central shaft of a tripod on the market is not flexible enough, and the stability is poor after the angle is adjusted, so that the position deviation is easy to occur, and the shooting effect is influenced; in addition, the tripod on the market does not have a middle shaft safety structure, and a user easily damages shooting equipment placed on the tripod due to overlarge force in the process of pulling off the middle shaft.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model provides a tripod center shaft adjusting device, aiming at solving the problems that the center shaft angle is not flexible enough in the using process of a tripod, the stability is poor after the angle is adjusted, the position deviation is easy to occur, and the shooting effect is influenced; in addition, the tripod on the market does not have axis insurance structure, and the user easily leads to damaging the problem of the shooting equipment of placing on the tripod because of exerting oneself too greatly at the in-process of pulling off the axis.

In order to achieve the purpose, the utility model provides the following technical scheme:

a tripod middle shaft adjusting device comprises a three-cutting seat, a rotating assembly, a middle shaft assembly and a telescopic fixing assembly; the rotating assembly is arranged on the three cutting seats; the middle shaft assembly and the telescopic fixing assembly are both arranged on the rotating assembly; one end of the telescopic fixing component penetrates through the rotating component and then abuts against the middle shaft component;

the rotating assembly comprises a first bracket, a second bracket, a rotating shaft arranged between the first bracket and the second bracket, a first spring, a first locking ring, a second locking ring, a pressing plate and a knob; the first support is arranged on the third cutting seat; one end of the rotary shaft is rotatably arranged on the first support, and the other end of the rotary shaft penetrates through the first spring, the first locking ring, the second locking ring and the pressing plate in sequence and then is connected with the knob; one end of the first spring penetrates through the first locking ring and then abuts against the first support, and the other end of the first spring abuts against the second locking ring; a first fluted disc is arranged at one end of the first locking ring close to the second locking ring; one end of the second locking ring, which is close to the first locking ring, is provided with a second fluted disc matched with the first fluted disc; the second support is matched with the outer edge of the second locking ring.

In some embodiments, the first locking ring is fixed on the first bracket through a screw, so that a user can adjust the distance between the second locking ring and the first locking ring through tightening or loosening the knob, so that the knob adjusts the meshing tightness between the first toothed disc and the second toothed disc through the pressure plate, thereby facilitating the purpose of flexibly adjusting the angle of the bottom bracket assembly through rotating the second bracket, and the meshing of the first toothed disc and the second toothed disc can ensure the stability of the bottom bracket assembly after the angle is adjusted.

In some embodiments, the degree of engagement of the first and second chainrings can be divided into fully engaged, incompletely engaged, and disengaged; in a complete meshing state, the second fluted disc is fastened on the first fluted disc, and at the moment, the middle shaft assembly is in a fixed state and cannot adjust the angle; under the incomplete meshing state, the middle shaft assembly can be adjusted according to the angle of each degree, and because the first fluted disc is fixed and fixed, the second fluted disc can rotate around the first fluted disc, but interference can occur between the fluted discs when the first fluted disc and the second fluted disc move relatively, slight 'click' sound is generated in the adjusting process, and the hand feeling of a user can be improved; under the non-meshing state, the first fluted disc is separated from the second fluted disc, and at the moment, the middle shaft assembly can be adjusted at will within a certain angle clockwise or anticlockwise.

In some embodiments, one end of the first bracket, which is close to the third cutting seat, is provided with a first middle shaft hole, and the other end of the first bracket is provided with a first rotating shaft hole; one end of the second bracket is provided with a second middle shaft hole, and the other end of the second bracket is provided with a second rotating shaft hole; the first middle shaft hole and the second middle shaft hole are coaxially arranged; the first middle shaft hole and the second middle shaft hole are respectively matched with the middle shaft assembly; the first rotating shaft hole and the second rotating shaft hole are coaxially arranged; the first rotating shaft hole and the rotating shaft are coaxially arranged.

In some embodiments, the hole wall of the second rotating shaft hole is uniformly provided with a plurality of convex protrusions; a plurality of concaves matched with the convex parts are uniformly arranged on the outer edge of the second locking ring. The outer protrusion is clamped on the inner recess, so that the second support can rotate around the axis of the two locking rings, and the angle of the middle shaft assembly is changed.

In some embodiments, the bottom bracket assembly comprises a bottom bracket and a bottom bracket; the middle shaft is of a hollow structure; one end of the middle shaft, which is close to the safety component, is provided with a first through hole; the middle shaft and the second middle shaft hole are coaxially arranged; the middle shaft can stretch and move on the first middle shaft hole and the second middle shaft hole, so that the height of the object stage on the middle shaft can be adjusted conveniently, the height of the shooting equipment on the object stage can be raised or lowered, and a user can find the optimal shooting height.

In some embodiments, the safety assembly includes a housing, and a sliding block, a second spring, and a button disposed within the housing, respectively; the shell is provided with a second through hole; one end of the second spring is abutted against the inner wall of the middle shaft, and the other end of the second spring is connected with one end of the sliding block; one end, far away from the second spring, of the sliding block sequentially penetrates through the button, the second through hole and the first through hole; the top of the button is abutted against the sliding block.

In some embodiments, the slider includes a first cylinder, and a second cylinder connected to the first cylinder; one end of the first cylinder, which is far away from the first cylinder, is connected with the second spring; and a first inclined plane structure matched with the button is arranged on the first cylinder.

In some embodiments, an end of the second cylinder away from the first cylinder is further provided with a second bevel structure.

In some embodiments, the button is provided with a third ramp structure adapted to the first ramp structure. When the button is pressed, the third inclined structure acts on the first inclined structure, so that the sliding block compresses the second spring under the pushing of the button, and the part of the sliding block extending out of the first through hole is retracted into the shell.

In some embodiments, a first locking glue is further arranged between the first middle shaft hole and the middle shaft; and a second locking glue is also arranged between the second middle shaft hole and the middle shaft. The first locking glue and the second locking glue can effectively increase friction force, so that the middle shaft is locked through the telescopic fixing component, and the middle shaft is effectively protected from being scratched and abraded when the middle shaft moves in the first middle shaft hole and the second middle shaft hole in a telescopic mode.

In some embodiments, a plurality of first arc-shaped notches are uniformly arranged on the first locking glue; a plurality of second arc-shaped notches are uniformly formed in the second locking glue; the first arc-shaped notches correspond to the second arc-shaped notches one by one; the opening direction of the first arc-shaped notch is the same as that of the second arc-shaped notch.

In some embodiments, when the first central axle hole and the second central axle hole are coaxially arranged, the openings of the first arc-shaped notch and the second arc-shaped notch face the ground; the first arc-shaped notch and the second arc-shaped notch are matched with the safety component to form a safety structure in the pulling-out process of the middle shaft.

In some embodiments, the telescoping securing assembly comprises a first lock catch and a first press block; the first lock catch penetrates through the second support and then is connected with the first pressing block. Specifically, when the axial movement of the middle shaft needs to be fixed, the first lock catch is screwed down, so that the first pressing block presses the second locking rubber, the middle shaft is further pressed and fixed, and the middle shaft is prevented from axial position deviation in the using process of a user; in the process, the second locking glue can play a role in bearing pressure and isolation, so that the telescopic fixing component is prevented from directly contacting with the middle shaft, and the middle shaft is protected.

In some embodiments, a second lock catch and a second pressing block are arranged on the third cutting seat; and the second lock catch penetrates through the three cutting seats and is connected with the second pressing block. Specifically, when the second lock catch is screwed, the second pressing block presses and fixes the first support on the three cutting seats, so that the first support and the three cutting seats are kept relatively fixed and cannot rotate, and the stability of the shooting equipment is ensured.

When a user shoots with a tripod, the middle shaft is required to be installed in the first middle shaft hole and the second middle shaft hole:

the user can directly pass the centre shaft through the second centre shaft hole and the first centre shaft hole in proper order, because the second inclined plane structure that sets up on the second cylinder of sliding block has the effect of direction, when third inclined plane structure and first viscose with the second viscose touches, the sliding block stretches out the part of centre shaft can be automatic to bounce back in the casing, can not hinder the installation of centre shaft.

When a user finishes shooting by using a tripod and needs to take the middle shaft out of the first middle shaft hole and the second middle shaft hole:

firstly, the middle shaft is pulled away from the ground, and when the safety component at the bottom of the middle shaft reaches the position of the first glue locking, the second cylinder of the sliding block is just clamped on the first arc-shaped notch of the first glue locking, so that a user cannot pull the middle shaft; at the moment, the button needs to be pressed once, so that the second cylinder retracts into the shell; the user continues to pull the middle shaft; when the safety assembly reaches the position of the second locking glue, the second cylinder of the sliding block is popped out to the second arc-shaped notch of the second locking glue under the action of the second spring, so that a user cannot pull the middle shaft; at the moment, the button needs to be pressed once again, so that the second cylinder retracts into the shell again; the user can pull the middle shaft continuously to take out the middle shaft; the button needs to be pressed twice when the middle shaft is pulled out, so that a good safety effect is achieved, damage to photographic equipment placed on the middle shaft object stage caused by that a user pulls out the middle shaft by too large force instantly is effectively avoided, and the experience of the user is improved.

In some embodiments, when the angle of the middle shaft needs to be adjusted, the middle shaft needs to be pulled into the second middle shaft hole, so that an end face of the middle shaft, which is close to the safety component, is always kept in the second middle shaft hole in the process of adjusting the angle of the middle shaft.

The utility model provides a tripod middle shaft adjusting device, wherein one end of a rotary shaft is rotatably arranged on a fixed first support, so that the rotary center of the rotary shaft cannot deviate all the time, and the stability and the accuracy in the middle shaft angle adjusting process and the returning process are ensured. The tooth surface matching and the matching between the knob and the rotating shaft are arranged on the locking ring, so that the angle adjustment of the middle shaft has controllability and flexibility. Through the cooperation between the safety component arranged at the bottom of the middle shaft and the locking glue, double safety is formed, and the condition that a user excessively pulls off the middle shaft instantly with force to damage photographic equipment can be effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of the general structure of a tripod central axis adjusting device according to an embodiment of the utility model;

FIG. 2 is an exploded view of the rotating assembly of FIG. 1;

FIG. 3 is a perspective view of the second locking ring of FIG. 2;

FIG. 4 is an exploded view of the telescoping securing assembly of FIG. 1 mounted on a second bracket;

FIG. 5 is an exploded view of the bottom bracket assembly of FIG. 1;

FIG. 6 is an exploded view of the safety assembly of FIG. 5;

FIG. 7 is a perspective view of the slider shown in FIG. 6;

FIG. 8 is a schematic view of the first locking rubber and the second locking rubber of FIG. 2 respectively in a working state with the bottom bracket assembly;

fig. 9 is an exploded view of the triple split seat of fig. 1.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

At present, the angle of a central shaft of a tripod on the market is not flexible enough, and the stability is poor after the angle is adjusted, so that the position deviation is easy to occur, and the shooting effect is influenced; in addition, the tripod on the market does not have a middle shaft safety structure, and a user easily damages shooting equipment placed on the tripod due to overlarge force in the process of pulling off the middle shaft. In order to solve the technical problem, the utility model provides a tripod middle shaft adjusting device.

As shown in fig. 1 to 3, the present invention provides a tripod middle shaft adjusting device, which comprises a three-cutting base 1, a rotating assembly 2, a middle shaft assembly 3 and a telescopic fixing assembly 4; the rotating assembly 2 is arranged on the three cutting seats 1; the middle shaft assembly 3 and the telescopic fixing assembly 4 are both arranged on the rotating assembly 2; one end of the telescopic fixing component 4 penetrates through the rotating component 2 and then is abutted with the middle shaft component 4;

the rotating assembly 2 comprises a first bracket 21, a second bracket 22, a rotating shaft 23 arranged between the first bracket 21 and the second bracket 22, a first spring 24, a first locking ring 25, a second locking ring 26, a pressure plate 27 and a knob 28; the first bracket 21 is arranged on the three cutting seats 1; one end of the rotary shaft 23 is rotatably arranged on the first bracket 21, and the other end of the rotary shaft passes through the first spring 24, the first locking ring 25, the second locking ring 26 and the pressure plate 26 in sequence and then is connected with the knob 28; one end of the first spring 24 is abutted with the first bracket 21 after penetrating through the first locking ring 25, and the other end is abutted with the second locking ring 26; a first fluted disc 251 is arranged at one end of the first locking ring 25 close to the second locking ring 26; a second toothed disc 261 matched with the first toothed disc 251 is arranged at one end, close to the first locking ring 25, of the second locking ring 26; the second bracket 21 is matched with the outer edge of the second locking ring 26.

In this embodiment, the first locking ring 25 is fixed on the first bracket 21 by screws, so that a user can adjust the distance between the second locking ring 26 and the first locking ring 25 by screwing or unscrewing the knob 28, so that the knob 28 adjusts the meshing tightness between the first toothed disc 251 and the second toothed disc 261 by the pressing plate 27, thereby facilitating the purpose of flexibly adjusting the angle of the bottom bracket assembly 3 by rotating the second bracket 22, and the meshing of the first toothed disc 251 and the second toothed disc 261 can ensure the stability of the bottom bracket assembly 3 after the angle is adjusted.

In this embodiment, the engagement degree of the first toothed plate 251 and the second toothed plate 261 can be divided into full engagement, incomplete engagement and non-engagement; in a fully meshed state, the second toothed disc 261 is fastened to the first toothed disc 251, and at this time, the bottom bracket assembly 3 is in a fixed state and cannot be adjusted in angle; under the incomplete meshing state, the bottom bracket assembly 3 can be adjusted according to the angle of 15 degrees each time, because the first toothed disc 251 is fixed and the second toothed disc 261 can rotate around the first toothed disc 251, but interference occurs between the toothed discs when the first toothed disc 251 and the second toothed disc 251 move relatively, a slight 'click' sound is generated in the adjusting process, and the hand feeling of a user can be improved; in the disengaged state, the first toothed plate 251 is separated from the second toothed plate 261, and the bottom bracket assembly 3 can be arbitrarily adjusted within a certain angle in a clockwise or counterclockwise direction.

Referring to fig. 2, in the present embodiment, one end of the first bracket 21 close to the third cutting seat 1 is provided with a first middle shaft hole 211, and the other end is provided with a first rotating shaft hole 212; one end of the second bracket 22 is provided with a second middle shaft hole 221, and the other end is provided with a second rotating shaft hole 222; the first middle shaft hole 211 and the second middle shaft hole 221 are coaxially arranged; the first middle shaft hole 211 and the second middle shaft hole 221 are respectively matched with the middle shaft component 3; the first spindle hole 212 and the second spindle hole 222 are coaxially disposed.

Referring to fig. 3 and 4, in the present embodiment, a plurality of protrusions 2221 are uniformly disposed on the hole wall of the second spindle hole 222; a plurality of concave parts 262 matched with the convex parts 2221 are uniformly arranged on the outer edge of the second locking ring 26. The outer protrusion 2221 is engaged with the inner recess 262, so that the second bracket 22 can rotate around the axis of the two locking rings 26, thereby changing the angle of the bottom bracket assembly 3.

Referring to fig. 5, in the present embodiment, the bottom bracket assembly 3 includes a bottom bracket 31 and a safety assembly 32 disposed at the bottom of the bottom bracket 31; the middle shaft 31 is of a hollow structure; one end of the middle shaft 31 close to the safety component 32 is provided with a first through hole 311; the middle shaft 31 and the second middle shaft hole 221 are coaxially arranged; the middle shaft 31 can move in a telescopic manner on the first middle shaft hole 211 and the second middle shaft hole 221, so that the height of the object stage on the middle shaft 31 can be adjusted, and then the height of the shooting equipment on the object stage can be raised or lowered, so that a user can find the optimal shooting height.

Referring to fig. 6, in the present embodiment, the safety assembly 32 includes a housing 321, and a sliding block 322, a second spring 323, and a button 324 respectively disposed in the housing 321; the housing 321 is provided with a second through hole 3211; one end of the second spring 323 is abutted against the inner wall of the middle shaft 31, and the other end is connected with one end of the sliding block 322; one end of the sliding block 322, which is far away from the second spring 323, sequentially passes through the button 324, the second through hole 3211 and the first through hole 311; the top of the button 324 abuts the slider 322.

Referring to fig. 7, in the present embodiment, the slider 322 includes a first cylinder 3221 and a second cylinder 3222 connected to the first cylinder 3221; one end of the first cylinder 3221 away from the first cylinder 3222 is connected to the second spring 323; the first cylinder 3221 is provided with a first inclined surface 3223 adapted to the button 324.

A second inclined surface structure 3224 is further disposed at an end of the second cylinder 3222 away from the first cylinder 3221.

Referring to fig. 6 again, in the present embodiment, a third inclined surface structure 3241 is disposed on the button 324, which is matched with the first inclined surface 3223. When the button 324 is pressed, the third inclined surface structure 3241 acts on the first inclined surface structure 3223, so that the sliding block 322 compresses the second spring 323 under the pushing of the button 324, thereby retracting the portion of the sliding block 322 extending out of the first through hole 311 into the housing 321.

Referring to fig. 2 and 8, in the present embodiment, a first locking glue 5 is further disposed between the first middle axle hole 211 and the middle axle 31; and a second locking rubber 6 is also arranged between the second middle axle hole 221 and the middle axle 31. The first locking glue 5 and the second locking glue 6 can effectively increase friction force, so that the middle shaft 31 is locked through the telescopic fixing component 4, and the middle shaft 31 is effectively protected from scratching and abrasion during telescopic movement in the first middle shaft hole 211 and the second middle shaft hole 221.

Referring to fig. 2 or 8 again, in this embodiment, a plurality of first arc-shaped notches 51 are uniformly arranged on the first locking glue 5; a plurality of second arc-shaped notches 61 are uniformly arranged on the second locking glue 6; the first arc-shaped notches 51 correspond to the second arc-shaped notches 61 one by one; the opening direction of the first arc-shaped notch 51 is the same as the opening direction of the second arc-shaped notch 61.

In this embodiment, when the first central axis hole 211 and the second central axis hole 221 are coaxially disposed, the openings of the first arc notch 51 and the second arc notch 61 face the ground; the first arc-shaped notch 51 and the second arc-shaped notch 61 are matched with the safety component 32 to form a safety structure in the pulling-out process of the middle shaft 31.

Referring again to fig. 4, in the present embodiment, the telescopic fixing assembly 4 includes a first locking buckle 41 and a first pressing block 42; the first lock catch 41 passes through the second bracket 22 and then is connected to the first pressing block 42. Specifically, when the axial movement of the middle shaft 31 needs to be fixed, the first lock catch 41 is screwed down, so that the first pressing block 42 presses the second lock rubber 6, and further the middle shaft 31 is pressed and fixed, thereby avoiding the axial position deviation of the middle shaft 31 in the using process of a user; in this process, the second locking glue 6 can perform the functions of bearing pressure and isolating, so as to prevent the telescopic fixing component 4 from directly contacting with the middle shaft 31, and protect the middle shaft 31.

Referring to fig. 9, in the present embodiment, a second lock catch 11 and a second pressing block 12 are disposed on the three-cutting seat 1; the second lock catch 12 penetrates through the three cutting seats 1 and then is connected with the second pressing block 12. Specifically, when the second lock 11 is fastened, the second pressing block 12 presses and fixes the first bracket 21 on the three-cutting seat 1, so that the first bracket 21 and the three-cutting seat 1 are kept relatively fixed and cannot rotate, and the stability of the shooting equipment is ensured.

When a user takes a photograph using a tripod and needs to mount the bottom bracket 31 in the first and second bottom bracket holes 211 and 221:

the user can directly pass the middle shaft 31 through the second middle shaft hole 221 and the first middle shaft hole 211 in sequence, and since the second inclined surface structure 3224 arranged on the second cylinder 3222 of the sliding block 322 has a guiding function, when the third inclined surface structure 3224 is contacted with the first locking glue 5 and the second locking glue 6, the portion of the sliding block 322 extending out of the middle shaft 31 automatically springs back into the housing 321, so as not to hinder the installation of the middle shaft 31.

When the user needs to take the middle shaft 31 out of the first middle shaft hole 211 and the second middle shaft hole 221 after finishing shooting with the tripod:

firstly, the center shaft 31 is pulled away from the ground, and when the safety component 32 at the bottom of the center shaft 31 reaches the position of the first locking glue 5, the second cylinder 3222 of the sliding block 322 is just clamped on the first arc-shaped notch 51 of the first locking glue 5, so that a user cannot pull the center shaft 31; at this time, the button 324 needs to be pressed once, so that the second cylinder 3222 retracts into the housing 321; the user continues to pull the middle shaft 31; when the safety component 32 reaches the position of the second locking adhesive 6, the second cylinder 3222 of the sliding block 322 is ejected to the second arc notch 61 of the second locking adhesive 6 under the action of the second spring 323, so that the user cannot pull the middle shaft 31; at this time, the button 324 needs to be pressed once again, so that the second cylinder 3222 is retreated into the housing 321 again; the user can pull the middle shaft 31 continuously to take out the middle shaft; the button 324 is required to be pressed twice when the middle shaft 31 is pulled out, so that a good insurance effect is achieved, damage to photographic equipment placed on the object stage of the middle shaft 31 caused by that a user pulls out the middle shaft by excessive force instantly is effectively avoided, and the experience of the user is improved.

In this embodiment, when the angle of the middle axle 31 needs to be adjusted, the middle axle 31 needs to be pulled into the second middle axle hole 221, so that an end surface of the middle axle 31 close to the safety component 32 is always kept in the second middle axle hole 221 during the process of adjusting the angle of the middle axle 31.

The embodiment of the utility model provides a tripod middle shaft adjusting device, one end of a rotary shaft 23 is rotatably arranged on a fixed first support 21, so that the rotary center of the rotary shaft 23 cannot deviate all the time, and the stability and the accuracy in the angle adjusting process and the returning process of a middle shaft 31 are ensured. The tooth surface matching is arranged on the locking ring, and the matching between the knob 28 and the rotating shaft 23 is realized, so that the angle adjustment of the middle shaft 31 has controllability and flexibility. Through the cooperation between the safety component 32 arranged at the bottom of the middle shaft 31 and the locking glue, double safety is formed, and the condition that a user excessively pulls off the middle shaft 31 by instant force to damage photographic equipment can be effectively avoided.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A tripod middle shaft adjusting device is characterized by comprising a three-cutting seat, a rotating assembly, a middle shaft assembly and a telescopic fixing assembly; the rotating assembly is arranged on the three cutting seats; the middle shaft assembly and the telescopic fixing assembly are both arranged on the rotating assembly; one end of the telescopic fixing component penetrates through the rotating component and then abuts against the middle shaft component;

the rotating assembly comprises a first bracket, a second bracket, a rotating shaft arranged between the first bracket and the second bracket, a first spring, a first locking ring, a second locking ring, a pressing plate and a knob; the first support is arranged on the third cutting seat; one end of the rotary shaft is rotatably arranged on the first support, and the other end of the rotary shaft penetrates through the first spring, the first locking ring, the second locking ring and the pressing plate in sequence and then is connected with the knob; one end of the first spring penetrates through the first locking ring and then abuts against the first support, and the other end of the first spring abuts against the second locking ring; a first fluted disc is arranged at one end of the first locking ring close to the second locking ring; one end of the second locking ring, which is close to the first locking ring, is provided with a second fluted disc matched with the first fluted disc; the second support is matched with the outer edge of the second locking ring.

2. A tripod centre shaft adjusting device according to claim 1, wherein one end of the first bracket near the third cutting base is provided with a first centre shaft hole, and the other end is provided with a first rotating shaft hole; one end of the second bracket is provided with a second middle shaft hole, and the other end of the second bracket is provided with a second rotating shaft hole; the first middle shaft hole and the second middle shaft hole are coaxially arranged; the first middle shaft hole and the second middle shaft hole are respectively matched with the middle shaft assembly; the first rotating shaft hole and the second rotating shaft hole are coaxially arranged; the first rotating shaft hole and the rotating shaft are coaxially arranged.

3. The tripod central axis adjusting device of claim 2, wherein a plurality of protrusions are uniformly arranged on the hole wall of the second rotating shaft hole; a plurality of concaves matched with the convex parts are uniformly arranged on the outer edge of the second locking ring.

4. A tripod bottom bracket adjustment assembly according to claim 2, wherein said bottom bracket assembly comprises a bottom bracket and a safety assembly disposed at the bottom of said bottom bracket; the middle shaft is of a hollow structure; one end of the middle shaft, which is close to the safety component, is provided with a first through hole; the middle shaft and the second middle shaft hole are coaxially arranged.

5. A tripod bottom bracket adjustment apparatus according to claim 4, wherein said safety assembly comprises a housing, and a sliding block, a second spring and a button respectively disposed within said housing; the shell is provided with a second through hole; one end of the second spring is abutted against the inner wall of the middle shaft, and the other end of the second spring is connected with one end of the sliding block; one end, far away from the second spring, of the sliding block sequentially penetrates through the button, the second through hole and the first through hole; the top of the button is abutted against the sliding block.

6. The tripod central axis adjustment apparatus of claim 5, wherein said sliding block comprises a first cylinder and a second cylinder connected to said first cylinder; one end of the first cylinder, which is far away from the first cylinder, is connected with the second spring; a first inclined plane structure matched with the button is arranged on the first cylinder; and a second inclined plane structure is further arranged at one end, far away from the first cylinder, of the second cylinder.

7. A tripod bottom bracket adjustment assembly according to claim 6, wherein said button is provided with a third ramp structure adapted to said first ramp structure.

8. A tripod bottom bracket adjustment apparatus as claimed in claim 2, wherein a first locking glue is further provided between said first bottom bracket aperture and said bottom bracket; a second locking glue is also arranged between the second middle shaft hole and the middle shaft;

a plurality of first arc-shaped notches are uniformly formed in the first locking glue; a plurality of second arc-shaped notches are uniformly formed in the second locking glue; the first arc-shaped notches correspond to the second arc-shaped notches one by one; the opening direction of the first arc-shaped notch is the same as that of the second arc-shaped notch.

9. A tripod bottom bracket adjustment assembly according to claim 1, wherein said telescoping securing assembly comprises a first latch and a first press block; the first lock catch penetrates through the second support and then is connected with the first pressing block.

10. The tripod central axis adjusting device of claim 1, wherein a second lock catch and a second pressing block are arranged on the three cutting bases; and the second lock catch penetrates through the three cutting seats and is connected with the second pressing block.

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