CN101929597B

CN101929597B - Plate type tripod

Info

Publication number: CN101929597B
Application number: CN 200910179994
Authority: CN
Inventors: 刘昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-23
Filing date: 2009-10-16
Publication date: 2013-03-20
Anticipated expiration: 2029-10-16
Also published as: WO2010148634A1; CN101929597A; CN101609247A

Abstract

According to the invention, a plate type tripod comprises a body seat (1) and three foot pipe fittings (2) each of which is provided with an independent articulated mechanism capable of pivoting so as to connect the pipe fittings onto the body seat (1) when each foot pipe fitting (2) is at a folded position or an unfolded position, wherein, at the folding position, the three foot pipe fittings (2) are arranged in the state of a plate, the hinge mechanism of each foot pipe fitting is provided with an individual hinge shaft, at the folded position or the unfolded position, the projections of the axes (A1, A2 and A3) of the hinge shafts of the tree foot pipe fittings always cross to form a triangle, the hinge mechanism of the each foot pipe fitting is arranged and configured to be capable of keeping the upper head face of the body seat (1) to be horizontal when each foot pipe fitting pivots relative to the body seat. The tripod has small volume, is convenient to carry, has simple structure and is convenient to open.

Description

Flat tripod

Technical field

The present invention relates to the photographic goods field, particularly used foot rest or support.

Background technology

Photographic tripod is one of photographic goods of commonly using, and the tripod of selling in the market mainly comprises body, support bar (or claiming axis), three adjustable pin pipe fittings and support bar latch mechanism.The pin pipe fitting is hinged by himself linkwork and body respectively so that the pin pipe fitting relatively body pivot and open and draw in.But three pin pipe fittings of this tripod in other words its linkwork around be distributed in body around, three pin pipe fittings are not in after gathering in the plane, do not become in other words tabular, thereby the more large and not Portable belt of volume.

Chinese invention patent 94204462.2 discloses a kind of portable tripod, and it comprises lid, fixed block, degree of tightness spanner and foot rest.This tripod is telescopic foot rest, and three pin pipe fittings can and synthesize tabular, small volume after gathering.But, central member pipe fitting in three pin pipe fittings of this tripod is fixedly mounted on the lid in the mode that relative lid pivots, the two side legs pipe fitting is being connected with lid around the mode of separately hinge pin rotation, so when opening, the two side legs pipe fitting swings aside, and centre pin pipe fitting and lid are together relatively in an opposite side, be installed in photographic goods on the lid upper surface such as camera this moment also thereupon in an opposite side, three pin pipe fittings tilt on being supported on the level ground time, thereby the lid upper surface is also relative level terrain slope certain angle of camera carrying plane, the result, the center of gravity of camera not with the center superposition of the tripod of opening, off-centre occurred, especially when supporting heavier photographic goods, this is easy to cause that supporting is unstable.

Chinese utility model patent ZL200820038229 discloses a kind of multiplex foot rest, and it mainly is comprised of support bar, The Cloud Terrace joint and web member, and support bar is comprised of interface and the body of rod.This foot rest comprises three pin pipe fittings equally, mobile jib is connected with the mobile jib interface by hinge, auxiliary rod interface and mobile jib interface are rotationally connected, auxiliary rod so is arranged on the auxiliary rod interface simultaneously, be that it not only can be around rotating than axle, thereby when opening, the mobile jib backswing of the relative center of the auxiliary rod of both sides, and auxiliary rod also to the left and right both sides open.But in such foot rest, there is equally eccentricity issues, shown in for example clear by Fig. 8 of this patent, the The Cloud Terrace joint that is contained on the mobile jib interface departs from the tripod center, and can only be by the The Cloud Terrace joint construction be become can rotate relative to the mobile jib interface, guarantee The Cloud Terrace joint (upper surface) keeps horizontality, otherwise the The Cloud Terrace joint and and then still relative level terrain slope of camera, the result, it is unstable supporting to occur easily, especially when photographic goods are heavier.In addition, there is the more loaded down with trivial details problem of adjusting in foot rest, because when becoming tripod to open, the center mobile jib is swung aside, make again the both sides auxiliary rod to an opposite side oscillation, and then auxiliary rod is swung respectively to the left and right, and then adjust the The Cloud Terrace joint, could realize the reliable horizontal location of camera.

Summary of the invention

The objective of the invention is the deficiency that exists for prior art and a kind of not only small volume is provided and is convenient for carrying but also flat tripod simple in structure and easy to adjust.

To achieve these goals, the invention provides a kind of flat tripod, comprise noumenal seat and three pin pipe fittings, each pin pipe fitting has independently linkwork, each pin pipe fitting is shown in an open position with ground, curling position this pin pipe fitting is connected to noumenal seat, wherein on the curling position, three pin pipe fittings are tabular and arrange, wherein, the linkwork of each pin pipe fitting has jointed shaft separately, wherein on described curling position and described open position, the projection of jointed shaft axis on surface level of three pin pipe fittings intersects a triangle all the time, and the linkwork of each pin pipe fitting is arranged and constructed into and can makes the noumenal seat upper surface keep horizontality when the relative noumenal seat of each pin pipe fitting pivots.

In the present invention, noumenal seat roughly is the shape of dull and stereotyped rectangular parallelepiped, the jointed shaft axis of the central member pipe fitting in three pin pipe fittings is arranged to and the central lines of the length direction of noumenal seat or parallel, the jointed shaft of the two side legs pipe fitting in three pin pipe fittings is so arranged, its separately central point in the projection on the surface level is positioned on the projection line of jointed shaft axis at surface level of central member pipe fitting, perhaps departs from this projection line.

According to preferred version of the present invention, the projection of jointed shaft axis on surface level of three pin pipe fittings intersects isosceles triangle, is preferably equilateral triangle.Its jointed shaft so tripod of configuration can be avoided tripod eccentric support problem of the prior art, thereby when carrying heavier camera, also can guarantee the supporting stability of tripod.

According to a scheme of the present invention, each linkwork comprises the web member with perforate on the cavity volume that is arranged on the noumenal seat and the top that is arranged on each pin pipe fitting, each web member is furnished with a pin spare as jointed shaft, and each web member is placed in the corresponding cavity volume pivotly by pin spare.

For the ease of assembling, on the sidewall of each cavity volume of these noumenal seat both sides, offer respectively porose, the center line in each hole respectively with the jointed shaft dead in line of two side legs pipe fitting, by pin spare being penetrated in corresponding perforate and the hole, the two side legs pipe fitting is placed in the corresponding cavity volume pivotly, contiguous block in the middle of wherein being provided with between central member pipe fitting and the central cavity volume in noumenal seat central authorities, the upper end of middle contiguous block are fixed on the top of central cavity volume and the web member that is connected with the central member pipe fitting lower end and pivot and connect.

Here, the top of the central cavity volume of noumenal seat is provided with a plurality of holes, the upper end of middle contiguous block is provided with flange part, and its lower end is configured so that the U-lag of the web member of admitting the pin tubular top, wherein flange part is provided with a plurality of openings corresponding with a plurality of holes at the top of the central cavity volume of noumenal seat, by gib screw being penetrated in these holes and the opening, middle contiguous block is connected to noumenal seat.In addition, also be provided with opening on the both sides cell wall of U-lag, by the perforate on the web member that pin spare is penetrated opening and central member pipe fitting, on the contiguous block, namely pivoting was connected on the noumenal seat in the middle of the central member pipe fitting was pivotably connected to.

Advantageously, noumenal seat is provided with three position-limit mechanisms, and the breach as the sidewall at cavity volume forms when tripod is opened, limits the open angle of each pin pipe fitting by these breach of pin tubular top butt.It will be appreciated by those skilled in the art that above-mentioned breach can be designed to the ladder breach, be used for realizing the Multistage Control of tripod open angle, be convenient to the user and select as required suitable open angle.

According to another embodiment of the present invention, each linkwork comprise be arranged on the noumenal seat with the projection section of perforate and be arranged on each pin tubular top the U-shaped tank and as the pin spare of jointed shaft, wherein offer opening at the both sides of U-shaped tank cell wall, by pin spare is penetrated in corresponding perforate and the opening, projection section is contained in the corresponding U-shaped tank pivotly.In this embodiment, the projection section that is positioned at noumenal seat central authorities is arranged on the noumenal seat removably, so that make and assembling.

Advantageously, as position-limit mechanism, can for each pin pipe fitting a tooth piece that at least two teeth are arranged be set at noumenal seat, be provided with the spacing regulating block that cooperates with one of them tooth of tooth piece on each pin pipe fitting top.According to the present invention, be arranged on the pulling type structure that remainder that spacing regulating block on each pin pipe fitting can be configured to relative pin pipe fitting moves forward and backward, hold it in different positions by extracting to regulate, so that its respective teeth with this tooth piece cooperates when the pin pipe fitting pivots.

As alternative scheme, spacing regulating block also can be arranged to the button type structure that the relative remainder of pin pipe fitting moves up and down, perhaps with the rotary shaft rotational structure of protuberance.Above-mentioned spacing regulating block all can cooperate with each tooth of tooth piece, opens to different angles with the restrict foot pipe fitting.

In the present invention, pin spare can be bolt, pin or double-screw bolt.Should be appreciated that and also can select as required other any suitable member as jointed shaft.In addition, also can use other any suitable linkwork.

Be compared with existing technology, tripod structure according to the present invention is simpler, adjusts more conveniently, and the camera center of gravity that can guarantee to be installed on the The Cloud Terrace overlaps with the center of gravity of tripod, also avoided tripod eccentric support problem of the prior art.

Description of drawings

Below, describe by reference to the accompanying drawings embodiments of the invention in detail, wherein:

Fig. 1 and Fig. 2 are the configuration schematic diagram according to the jointed shaft of three pin pipe fittings of tripod of the present invention;

Fig. 3 shows the decomposition view according to an embodiment of flat tripod of the present invention;

Fig. 4 is the upward view of the noumenal seat of the tripod among Fig. 3;

Fig. 5 is the stereographic map of the noumenal seat of the tripod among Fig. 3;

Fig. 6 is the stereographic map of the middle contiguous block of the tripod among Fig. 3;

Fig. 7 is the upper view that tripod shown in Figure 3 is in rounding state;

Fig. 8 is that tripod shown in Figure 3 is along the cut-open view of the long limit of body center line;

Fig. 9 is the front view that tripod shown in Figure 3 is in rounding state;

Figure 10 is the left view of tripod shown in Figure 9;

Figure 11 is the skeleton view that tripod shown in Figure 9 is in open mode;

Figure 12 is the decomposition view according to another embodiment of flat tripod of the present invention;

Figure 13 is the skeleton view that the tripod among Figure 12 is in rounding state;

Figure 14 is that tripod among Figure 12 is at the skeleton view of the first open position;

Figure 15 is that tripod among Figure 12 is at the skeleton view of the second open position;

Figure 16 to Figure 18 represents respectively the different structure of the spacing regulating block of tripod of the present invention.

Embodiment

Fig. 1 and Fig. 2 show the configuration schematic diagram according to the jointed shaft of three pin pipe fittings of tripod of the present invention.As can be seen from the figure, each jointed shaft 4 is configured to its hinge axes A1 separately, A2, the projection of A3 on surface level intersects triangle, the jointed shaft or its separately central point in the projection on the surface level that wherein are positioned at the pin pipe fitting of both sides in three pin pipe fittings are positioned on the projection line of jointed shaft axis at surface level of this central member pipe fitting, the axis A1 of these two jointed shafts, A2 is Y at the angle of surface level projection, and they and the angle of jointed shaft axis A3 that is positioned at the pin pipe fitting of central authorities are respectively X1 and X2.Scheme as an alternative is positioned at the jointed shaft of pin pipe fitting of both sides or the separately central point of its projection on surface level and also can departs from the jointed shaft axis of this central member pipe fitting at the projection line of surface level.Advantageously can adjust the angle of X1, X2 and Y as required, so that above-mentioned triangle is isosceles triangle, be preferably equilateral triangle.

Fig. 3 shows the decomposition view according to an embodiment of tripod of the present invention.Tripod comprises noumenal seat 1 and three pin pipe fittings 2, and the top of each pin pipe fitting is provided with

web member

3A, 3B, the 3C with perforate 31A, 31B, 31C.

In this embodiment, as shown in Figure 4 and Figure 5, noumenal seat 1 roughly is the shape of dull and stereotyped rectangular parallelepiped, be provided with three

cavity volume

11A, 11B and the 11C that is arranged side by side along the center line of its length direction at noumenal seat 1, here, each web member and corresponding cavity volume consist of a part that pin pipe fitting 2 pivots is connected to the linkwork on the noumenal seat 1, also are equipped with

bolt

4A, 4B, 4C, as the jointed shaft 4 of each linkwork.For the ease of installing, as shown in Figure 4, so offer respectively

shoulder hole

12A and 12C at the sidewall of cavity volume 11A, the 11C of noumenal seat 1 both sides, that is, the angle between the central axis in two holes is Y, here, angle Y is preferably 60 °.And, the central axis in two holes respectively with the angled X1 of central axis, the X2 of the length direction of noumenal seat 1, preferred X1 and X2 equate that more preferably X1 and X2 equal 60 °.By

bolt

4A, 4C being penetrated among corresponding perforate 31A, 31C and hole 12A, the 12C, the two side legs pipe fitting can be placed in corresponding cavity volume 11A, the 11C pivotly, thereby the axis A1, the A2 that make the both sides jointed shaft respectively with the central axes in two holes.In addition, the top at the central cavity volume 11B of noumenal seat 1 central authorities is that blind end also is provided with a plurality of holes 13.

According to a scheme of the present invention, the shape of central cavity volume 11B can be identical or close with the shape of its both sides cavity volume 11A and 11C.But for the ease of processing and making tripod more firm, in the present embodiment, central cavity volume 11B and the both sides cavity volume of noumenal seat 1 are designed to not identical.Such as Fig. 3 and shown in Figure 6, contiguous block 5 in the middle of between the central cavity volume 11B of central member pipe fitting and noumenal seat 1, being provided with, be formed with flange part 52 in the upper end of middle contiguous block 5, this flange part is provided with a plurality of perforates 53 corresponding with a plurality of holes 13 on the cavity volume 11B, by gib screw 14 is penetrated hole and perforate, can be fixed to middle contiguous block 5 on the noumenal seat 1.The lower end of middle contiguous block 5 is formed with U-lag, cell wall is provided with opening 54 in the both sides of U-lag, by bolt 4B being penetrated the perforate 31B on opening 54 and the web member 3B, contiguous block 5 in the middle of the central member pipe fitting is pivotably connected to, and after installation, as the central axes on the length direction of the central axis of the bolt 4B of jointed shaft 4 and noumenal seat 1.

For the tripod of said structure, after installing fully, each pin pipe fitting 2 relatively noumenal seat 1 pivots, and the pin pipe fitting can be shown in an open position and the curling position.When the pin pipe fitting was in the curling position, three pin pipe fittings 2 were arranged in tabular (referring to Fig. 7 to Figure 10), made the small volume after the gathering, were easy to carry.Advantageously, when the pin pipe fitting 2 of this tripod is in curling position and open position, axis A1, the A2 of each jointed shaft 4, the projection of A3 on surface level intersect triangle, so, tripod open and adjustment becomes more convenient, and when the axis of jointed shaft becomes equilateral triangle, the center of gravity of the camera that carries and tripod center of gravity overlap, the eccentric support phenomenon do not occur, thereby tripod is more firm.In addition, for the tripod of this structure, when pin pipe fitting 2 relative noumenal seats 1 pivoted, the upper surface of noumenal seat 1 can remain horizontality, the possibility that this upper surface or camera tilt when having eliminated the adjustment open angle.

Such as Fig. 3 and shown in Figure 5, extreme position when opening in order to limit three pin pipe fittings 2, be provided with position-limit mechanism at noumenal seat 1, such as

breach

15A, 15B and the 15C that on the sidewall of three cavity volumes, forms respectively, because be provided with so spacing breach, so when opening tripod, when the plane, top of pin pipe fitting 2 32A, 32B, the corresponding breach 15A of 32C butt, 15B, 15C, the pin pipe fitting can not be rotated further (referring to Figure 11), and these breach play restriction tripod open angle and the fixedly effect of open mode.In this embodiment, breach can only be controlled an open angle.But those skilled in the art are easy to expect that above-mentioned breach also can be designed to stepped, make things convenient for the user to select as required the open angle of tripod, reach the effect of multistage adjustment.

Be connected on the noumenal seat 1 for the pin pipe fitting is pivoted better, linkwork also is equipped with nut 7A, 7B and 7C.For this reason, on noumenal seat 1, be provided with groove 6A, 6C and hole 61A, the 61C that lays nut in the position corresponding to nut 7A, 7C.As shown in the figure, cavity volume 11B is larger, can have enough spaces to lay nut 7B.In addition, linkwork can also comprise pad 8A, 8B and 8C.Advantageously, be equipped with wear-resistant gasket 9 at the top of noumenal seat 1, play attractive in appearance and protective effect.Can be provided with attachment screw 10 at the noumenal seat top, be used for being connected with the The Cloud Terrace base.Those skilled in the art should expect that this screw also is substitutable for the combination of bolt, threaded hole and threaded hole and bolt, screw.

Figure 12 shows the decomposition view of another embodiment of flat tripod of the present invention.As shown in the figure, U-shaped tank 22A, 22B on the top that each linkwork comprises the 3A ' of projection section, 3B ' and the 3C ' with perforate 31A ', 31B ' and the 31C ' that are arranged on the noumenal seat 1, be arranged on pin pipe fitting 2 and 22C and as bolt 4A ', 4B ' and the 4C ' of jointed shaft, wherein offer opening 21A, 21B, 21C at the both sides of U-shaped tank cell wall, by bolt being penetrated corresponding perforate and opening, the 3A ' of projection section, 3B ' and 3C ' are contained in the corresponding tank pivotly.Advantageously, the projection of central axis on surface level of perforate 31A ', the 31B ' in each projection section and 31C ' intersects a triangle, and in this embodiment, this triangle is equilateral triangle.The angle that it will be appreciated by those skilled in the art that each angle of triangle can be adjusted as required by the relative position of corresponding layout jointed shaft.Advantageously, in this embodiment, for the ease of making and assembling, the 3A ' of projection section and the 3C ' that are positioned at noumenal seat 1 both sides are made into integration with noumenal seat 1, are removably mounted on the noumenal seat 1 and be positioned at the central 3B ' of projection section.

Three pin pipe fittings 2 are pivotably connected on the noumenal seat 1 by above-mentioned linkwork, and when tripod was in rounding state, three pin pipe fittings were arranged in tabular (as shown in figure 13), make the small volume of tripod and are easy to carry.

Advantageously, be provided with the tooth piece in noumenal seat 1 outside near each projection section place, tooth piece shown in Figure 3 has two teeth, and tooth matches with spacing regulating block 2a, the 2b and the 2c that are arranged on pin pipe fitting top, is used for controlling the in other words open angle of restrict foot pipe fitting.This structure can realize the two-stage control of each pin pipe fitting open angle, and as shown in figure 12, the tooth of the close below of

spacing regulating block

2a, 2c butt tooth piece makes tripod be in the first open position.Concrete structure about spacing regulating block, Figure 15 and shown in Figure 16 for example, the pulling type structure of spacing regulating block for moving forward and backward, by spacing regulating block is extracted, can make its when the pin pipe fitting pivots, walk around the tooth piece below tooth and tooth above the butt, thus tripod is remained on the second open position, at the second open position, the open angle of pin pipe fitting is greater than the pin pipe fitting open angle on the first open position.It will be understood by those skilled in the art that the tooth piece can be designed to a plurality of teeth, in order to as required the pin pipe fitting is fixedly remained on a plurality of open angles.

Scheme as an alternative, as shown in figure 17, spacing regulating block can be designed to button type structure moving up and down, by the adjusting of pressing to spacing regulating block, it is matched respectively with a plurality of teeth of tooth piece, thereby realize the multistage adjusting to the tripod open angle.Perhaps as shown in figure 18, spacing regulating block also can be designed to the rotary shaft rotational structure, rotates by making it, is matched with a corresponding tooth respectively in the difference protrusion position on the regulating block, thereby tripod can be remained on different open angles.

In according to the abovementioned embodiments of the present invention, above-mentioned also available pin, double-screw bolt replacement of bolt as jointed shaft.Should be appreciated that other any structure and member that is suitable as jointed shaft all is feasible.

At last, should be appreciated that it is exemplary and nonrestrictive more than describing, for having read those skilled in the art described above, except given embodiment, under the prerequisite that does not exceed the scope of the invention, it will be apparent that many changes and being equal to substitute.In addition, although the present invention mainly for photographic goods, for the instrument of surveying and mapping with similar structures and observation instrument such as telescope etc., the present invention also is suitable for.

Claims

1. flat tripod, comprise noumenal seat (1) and three pin pipe fittings (2), each pin pipe fitting (2) has independently linkwork, each pin pipe fitting (2) is shown in an open position with ground, curling position this pin pipe fitting is connected to this noumenal seat (1), wherein on the curling position, described three pin pipe fittings (2) are tabular and arrange, it is characterized in that, this noumenal seat (1) roughly is dull and stereotyped rectangular shape, the linkwork of each pin pipe fitting (2) has jointed shaft separately, wherein on described curling position and described open position, axis (the A1 of the jointed shaft of described three pin pipe fittings (2), A2, A3) projection on surface level intersects a triangle all the time, and the linkwork of each pin pipe fitting (2) is arranged and constructed into upper surface maintenance horizontality when relative this noumenal seat (1) of each pin pipe fitting pivots that can make this noumenal seat (1).

2. flat tripod according to claim 1, it is characterized in that, described triangle is isosceles triangle, the jointed shaft axis (A3) of the central member pipe fitting in described three pin pipe fittings is arranged to and the central lines of the length direction of this noumenal seat (1) or parallel, the jointed shaft of the two side legs pipe fitting in described three pin pipe fittings (2) so arranges, the jointed shaft axis that its separately central point in the projection on the surface level is positioned at this central member pipe fitting is on the projection line on the surface level or depart from this projection line.

3. flat tripod according to claim 2 is characterized in that, each linkwork comprises the cavity volume (11A that is arranged on this noumenal seat (1); 11B; 11C) and be arranged on band perforate (31A on the top of each pin pipe fitting; 31B; Web member (3A 31C); 3B; 3C), each web member is furnished with a pin spare (4A; 4B; 4C) as described jointed shaft, each cavity volume (11A of this noumenal seat (1) both sides wherein; Offer respectively porose (12A on sidewall 11C); 12C), the center line in each hole respectively with the jointed shaft axis (A1 of two side legs pipe fitting; A3) overlap, by described pin spare is penetrated in corresponding perforate and the hole, the two side legs pipe fitting is placed in the corresponding cavity volume pivotly, and contiguous block (5) in the middle of being provided with between central member pipe fitting and the central cavity volume (11B) in noumenal seat (1) central authorities, the upper end of this centre contiguous block are fixed on the connection that pivots of the top of this central authorities' cavity volume (11B) and the web member (3B) that is connected with the central member pipe fitting lower end.

4. flat tripod according to claim 3, it is characterized in that, the top of this central authorities' cavity volume (11B) is provided with a plurality of holes (13), the upper and lower side of this centre contiguous block (5) has respectively flange part (52) and U-lag, be provided with a plurality of perforates (53) corresponding with described a plurality of holes at this flange part (52), by gib screw (14) is penetrated in above-mentioned hole and the perforate, this centre contiguous block (5) is fixed on the noumenal seat (1), and be provided with opening (54) at the both sides of U-lag cell wall, by this pin spare (4B) being penetrated described opening and the perforate (31B) on the web member (3B) of this central member pipe fitting, this central member pipe fitting is pivotably mounted on this centre contiguous block (5).

5. flat tripod according to claim 4 is characterized in that, this noumenal seat (1) is equipped with three position-limit mechanism (15A; 15B; 15C), be used for limiting the open angle of each pin pipe fitting (2).

6. flat tripod according to claim 2 is characterized in that, each linkwork comprise be arranged on this noumenal seat (1) with perforate (31A '; 31B '; Projection section 31C ') (3A '; 3B '; 3C ') and be arranged on U-shaped tank (22A on the top of each pin pipe fitting (2); 22B; 22C) and as the pin spare of jointed shaft (4A '; 4B '; 4C '), offer opening (21A at the both sides of U-shaped tank cell wall; 21B; 21C), penetrate in corresponding perforate and the opening by making this pin spare, described projection section (3A '; 3B '; 3C ') be contained in pivotly in the corresponding U-shaped tank, and this projection section (3B ') that is located at noumenal seat (1) central authorities is arranged on this noumenal seat with removably.

7. flat tripod according to claim 5, it is characterized in that, on described noumenal seat (1), for each pin pipe fitting is provided with a tooth piece that at least two teeth are arranged, be provided with the spacing regulating block (2a that matches with one of them tooth of respective teeth piece on the top of each pin pipe fitting (2); 2b; 2c).

8. flat tripod according to claim 7 is characterized in that, described spacing regulating block (2a; 2b; 2c) be configured to the pulling type structure that the remainder of relatively described pin pipe fitting moves forward and backward, hold it in different positions by extracting to regulate, so that its respective teeth with this tooth piece cooperates when the pin pipe fitting pivots.

9. flat tripod according to claim 7 is characterized in that, described spacing regulating block (2a; 2b; 2c) be configured to can relatively described pin pipe fitting the push type structure that moves up and down of remainder, hold it in different positions by pressing to regulate, so that its respective teeth with this tooth piece cooperates when the pin pipe fitting pivots.

10. flat tripod according to claim 7 is characterized in that, described spacing regulating block (2a; 2b; 2c) be configured to rotational structure with the rotary shaft of protuberance, regulate so that the different piece of this protuberance cooperates with the respective teeth of this tooth piece by rotating.