CN1864594A

CN1864594A - Telescopic leg

Info

Publication number: CN1864594A
Application number: CN 200610077327
Authority: CN
Inventors: J·鲍威尔
Original assignee: JRC PRODUCTS Ltd
Current assignee: JRC PRODUCTS Ltd
Priority date: 2005-05-03
Filing date: 2006-04-30
Publication date: 2006-11-22
Also published as: GB0519044D0; GB0508939D0

Abstract

A telescopic leg which is adjustable in length comprises three relatively slidable sections. A releasable friction jamming mechanism acts between a pair of the sections whereby one section can be pulled out or pushed into the other section of the pair and secured in position by the jamming mechanism. Relative sliding between one of the pair of sections and a third section permits these two sections to be slid into an extended or a retracted position, and releasable locking means allows these two sections to be secured in either the extended or retracted position.

Description

Telescopic leg

Technical field

The present invention relates to be used for desk, chair, fish with the length-adjustable supporting leg of chaise longue, parasols etc.

Background technology

As everyone knows, telescopic leg is used to take pictures with tripod and prop stand, and its principle has applied in the chaise longue supporting leg that the rodman uses, with adapt to broken terrain and both covers are contracted and folding so that storage and (or) transport.

In general, a tripod supporting leg comprises three (or more) independently pars contractilis sections, thereby supporting leg can overlap and is reduced to short total length (being generally the 250-300 millimeter) or is stretched over long total length (usually above 1 meter).A general syllogic supporting leg comprises an outer sleeve that is connected to camera chassis one end, an intermediate sleeve that can slide in outer sleeve and the inner sleeve that can slide in intermediate sleeve.The other end at outer sleeve is equipped with the friction gripping mechanism so that intermediate sleeve relatively outer sleeve remain on select location, at the external part of intermediate sleeve similar device is housed also, thus inner sleeve relatively intermediate sleeve be locked in select location.

Use friction lock can adjust the length of sliding part section, thereby the total length of supporting leg can be transferred to any one length value between minimum of a value and the maximum.When minimum of a value, inner sleeve fully is withdrawn in the intermediate sleeve, and intermediate sleeve fully is withdrawn in the outer sleeve; When maximum, inner sleeve and intermediate sleeve all are stretched to maximum tolerance level.

Therefore, for example, the syllogic supporting leg length variations factor is about 3: 1.

Concerning fishing with chaise longue, its supporting leg regulatory function is applicable to rough landform and can makes overlaps the folding present subordinate of the supporting leg that contracts.In general, supporting leg need not be stretched over very big length and raise a portion, two-part supporting leg (maximum changed factor 2: 1) is enough, this be because the rodman would rather sit low a bit rather than sitting height a bit.

Be not to stand up from low seat or to sit on that low seat gets on is inconsiderate, but when the rodman of imposing stature, in the prime of life, just be necessary to transfer the seat portion of chaise longue higher, and the two-part telescopic leg can not be accomplished this point.

Summary of the invention

The objective of the invention is to aim at (but not exclusively) chair, fish and equip telescopic leg with chaise longue, it can make the seat portion of structure be in high relatively or low relatively position, and supporting leg can be folded under the framework of this structure, be convenient to storage and (or) transport.

According to the present invention, length-adjustable telescopic leg comprises three the portion's sections that can slide relatively and got loose a friction gripping mechanism that moves between a pair of section, this to portion's section in, inner section can be pulled out or push-and-pull is fixed on this position to any select location of another section and with gripping mechanism from another section, this is to sliding relatively between portion's section in portion's section and the 3rd portion's section, thereby these two portion's sections can slide into extended position respectively or slide into retracted position together, and the locking device that can get loose can be fixed on extended position or retracted position to these two portion's sections.

Preferably when two sticking department sections moved to abundant stretching, extension or abundant retracted position, the locking device that can get loose entered latched position rapidly.

The locking device that generally can get loose comprises an elastic button, and it is porose on above-mentioned two portion's sections, when the hole on time, button will be ejected in the hole, button in two holes can prevent two slips between the lockable portion section, Push button, locking device will get loose, and comes thereby button just no longer is projected into the outside of these two lockable portion sections.

The leg section section can be made circular cross-section, in this case, can between two lockable portion sections key seat be installed or other device prevents relatively rotating of two portion's sections.At the elastic button At time of eject, the situation of hole misalignment just can not appear like this; When allowing to relatively rotate, the situation of hole misalignment just can take place.

Can make noncircular cross section to lockable leg section section in addition, thereby when sliding vertically, can prevent that it from relatively rotating.Such as making ellipse or square sectional.

A better scheme is that button is installed on the inner section of two lockable portion sections, and it just can be aimed at a hole on the portion section wall like this, and button is ejected in the hole under the effect of reed; Two holes that closely link to each other are arranged on another (outside) lockable portion section.Hole on the Kong Weiyu inner section on the outer portion part is on time, but outer portion part relative interior section is slided; But hole on the outer portion part and the hole on the inner section are on time, and button will be ejected under the effect of reed in two holes, thereby has stoped the further slip of two lockable portion sections.

Although these two lockable portion sections are only to occupy abundant elongation and abundant retracted position, but can see that the syllogic supporting leg can have many variations in its length overall scope, this scope refers to from abundant withdrawal length (being about the longest portion segment length) to abundant extended length (total effective lengths of three sections).

In this connection, the effective length of inner section and intermediate section is less than their physical length, this be because the partial-length of inner section to keep somewhere in it so as to that section of sliding in to keep stable.

The friction gripping mechanism generally is installed in the lower end of outer portion part, and intermediate section is locked in any precalculated position of relative outer portion part, the locking device that can get loose acts between intermediate section and the inner section.

Friction chucking locking device sees GB2 for details, 258,151.

In a preferred plan, the friction gripping mechanism comprises an elastic load bar with holes, it enters into chucking by the spring biasing and engages, acting on spring by lifting (or depressing) can make it get loose, thereby bar is perpendicular to the leg section section, the chucking bar is placed in the shell, one opening is arranged to put bar on the another side of shell, contain to live the leg section section at the position of bar shell, bar all is contained within the shell, thereby bar can not touched unintentionally, can outstandingly not tangle clothes yet or hurt people's leg.

Generally, interior leg section section comprises a leg, and this leg preferably is articulated in supporting leg so that leg is folding and fully smooth on supporting leg so that storage, when using, leg can also adapt to inclined surface.

The most handy metal of leg section section is made, such as with steel pipe or aluminum pipe; Button is preferably also made with metal, such as hardened steel or hard plastic material.

General three portion's segment length are suitable each other, and still, holding device is in order to prevent intermediate section and break away from the most external section fully and the penetralia section breaks away from intermediate section fully.

Because the rigidity of supporting leg is very important, holding device should preferably guarantee to leave enough length in portion's section that intermediate section and penetralia Duan Zaiqi slide, when be stretched to that holding device allows at utmost the time, these sections of guaranteeing no matter whether to stretch form the structure of a rigidity.

In typical chaise longue, each leg section segment length is 200 millimeters a progression, and when two sliding part sections were in abundant elongation state, the section planted agent of portion that each sliding part Duan Zaiqi slides preferably left about 50 millimeters length.

Use described in the chaise longue as description and fishing of requirement in the patent application GBNo.0426200.2 of our pending trial; two pairs of this supporting legs are provided; a pair of supporting leg all is equipped with on every limit at the chaise longue middle part; thereby the square central area part that can sit the rodman usually is placed on about 200 millimeters or 350 millimeters or 500 millimeters of the chair that the disseats floor surface of living in.

This invention is not limited to fish and uses chaise longue, and it also applies to particularly apply in the folding furnitures such as folding seat, folding table, folding bed and folded umbrella in other furniture.

When the present invention applied to be foldable to the folding furniture (as fishing with in the chaise longue) of minimum configuration, it especially had value, because it only needs a gripping mechanism just can make the length of supporting leg carry out whole process adjustment.If use two this devices, the length overall of fully overlapping the rear support leg that contracts can be greater than the engage sleeves shrinking structure that can put into typical salon automobile back door opening of expectation, and when trailing, length adjustment scope deficiency is so that suitable position is brought up at the seat.

The present invention also can be applicable to install in the furniture of syllogic telescopic leg, in chair, parasols, fish usefulness chaise longue and desk, as previously mentioned.

The present invention also has been equipped with aforesaid friction gripping mechanism for telescopic leg, and in this device, the end of chucking bar can not reach its residing enclosure.

Description of drawings

Now with reference to accompanying drawing the present invention is described.

Fig. 1 is for expressing the partial cutaway schematic of telescopic leg assembly of the present invention;

Fig. 2 is the part sectioned view of leg assembly shown in Figure 1;

Fig. 3 is the front view of chucking bar supporting leg locking device;

Fig. 4 is the side view of device shown in Figure 3.

The specific embodiment

In the accompanying drawings, an end of outer tube 10 has used a ring flange 12, and it is fixed to outer tube chair, on the framework with chaise longue etc. of fishing, and hangs on this framework.

An intermediate casing 14 slidably in sleeve pipe 10 is arranged, a slidably inner sleeve 16 is arranged in intermediate casing 14.

A leg 18 that has ball-and-socket joint is equipped with in the lower end of intermediate casing 16, uses ball-and-socket joint, and leg sleeve pipe 16 relatively rotates adapting to rough surface, or as shown in FIG. 20, can fold up to be flattened on the leg assembly so that store.

In the lower end of sleeve pipe 10 shell 22 is arranged, this shell 22 maintains known hinged head clamp 24 within it, and a non-circular openings 25 is arranged on shell, and the external part of sleeve pipe 24 passes opening; Head clamp remains on diagram chucking angle by spring 26.Overcome spring 26 pushing the back down 24, opening 25 broken away from from sleeve pipe 14 is outside, thus sleeve pipe 14 relatively sleeve pipe 10 push away or draw.By known way, as long as the pressure that acts on the plate 24 is removed, plate will return to shown position, and gripping mechanism can tighten sleeve pipe 14.

This snap action can stop sleeve pipe 14 to enter any trend of sleeve pipe 10.

By engaging of the elastic load button 28 that is fixed on the inner sleeve 16, aims at the hole 30 in sleeve pipe 16 walls, prevent the sliding motion of inner sleeve 16 relative intermediate casings 14,, so can in the hole, pass.

Sleeve pipe 14 comprises a similar opening 31, and when sleeve pipe 16 was in its retracted position, hole 30 was aimed at opening 31, thereby button 28 is projected in two holes.Button has just stoped the relative motion of two sleeve pipes 14 and sleeve pipe 16 like this.

By abundant press push button 28, second hole 32 that sleeve pipe 16 can be pulled out from sleeve pipe 14 in sleeve pipe 16 walls aimed at the opening 31 in the sleeve pipe 14, at this moment second button 34 that is installed under sleeve pipe 16 mesopores 32 can pass

hole

30 and 32, thereby stoped

sleeve pipe

14 and 16 further relative slip, be depressed again up to button.

At shown position, by pull sleeve pipe 14 from sleeve pipe 10, supporting leg may be elongated to random length and allows length up to maximum.If long 200 millimeters of sleeve pipe 10, sleeve pipe 14 is suitable with it, if there is 50 millimeters length to keep somewhere lower end in sleeve pipe 10 to keep rigidity in the sleeve pipe 14, then elongation back length is about 350 millimeters.The setting of the annular flange 36 of annular sleeve 14 is used for engaging with the annular flange (not shown) of the inside of annular sleeve 10 preventing that sleeve pipe 14 from pulling, thereby sleeve pipe 14 stays the length in sleeve pipe 10 can be less than 50 millimeters.

Because head clamp 24 can be clamped in sleeve pipe 14 any centre position between its two extreme limit of travel positions in sleeve pipe 10, thereby supporting leg is fully regulated between its minimum length (200 millimeters) and middle development length (350 millimeters).

To further extend as supporting leg, sleeve pipe 14 at first is withdrawn in the sleeve pipe 10, fully press the button 28 then, sleeve pipe 16 is pulled out up to hole 32 opening 31 in 14 from sleeve pipe 14 aim at, so that second elastic load button 34 pass in two holes, thereby stoped the further relative motion (in any direction) of 16 of sleeve pipe 14 and sleeve pipes.At this moment the supporting leg fundamental length of being made up of sleeve pipe 10 length and sleeve pipe 16 extension elongations is about 350 millimeters.Depress plate 24 is extracted sleeve pipe 14 out from sleeve pipe 10, thereby supporting leg can extend to the random length between 500 millimeters of 350 millimeters and the maximum lengths, and at this moment sleeve pipe 14 relative sleeve pipes 10 are in its maximum elongation position.

Fig. 2 has shown how to use the crooked reed 38 (position of relative opening 30) that is installed on the internal surface of sleeve pipe that button 28 is installed in the sleeve pipe 16.Hole shown in Fig. 2 30 is aimed at 31, thereby button 28 can pass from two holes.

Second button 34 is installed in the sleeve pipe 16 on the position of axially spaced-apart, so that it is aimed at hole 32 with similar approach.

The diagram casing profile be a circle, so just need settle a key seat in case relatively rotate between

sleeve pipe

14 and 16, thereby when the suitable push-and-pull of the relative sleeve pipe of sleeve pipe 16 14, button 28 can align with the opening 31 ' on the sleeve pipe 14 all the time with 32.

Another kind method is that these two sleeve pipes are non-circular at least, such as square sectional, relatively rotate and only permission slip relatively thereby stop.

Fig. 3 and Fig. 4 have expressed a chucking lever apparatus (seeing GB2 for details, 258,151), wherein, in the shell 36 of hollow leg portion section 38 lower ends a perforated metal plate 34 are housed outside.The interior leg section section 40 of sliding in 38 extends through the opening 42 in the plate 34, and can pivot around the axle 44 of supporting leg 40 1 ends.

Fixed vertical is not in rotating shaft 44 for opening, and opening is bigger than the corresponding size of interior leg section section 40, and is parallel to the opening size of rotating shaft, is tightly being slidingly matched around supporting leg 40.

The downside effect of compression spring 46 plate one end between shell, it reaches the outside of supporting leg 40 at the other end of the supporting leg opposite with rotating shaft 44 present positions.

Can be clear that by Fig. 4 plate 34 is fixed on the inside of shell 36 in groove 46, limit pivot axis, its other end ends in the compass of shell 36.

Can touch bar 34 by the opening on the shell wall 48, by lower limb 50 and compress spring 46 bar is got loose, also can make the inner edge of opening 42 and the emaciated face of leg section section 40 leave, but thereby leg section section opposite shell 36 (with outer supporting leg 38) relative motion, plate 34 remains depressed state in this process.

The opening 48 of shell 36 is outside to be come because plate is projected into, and does not therefore just have to stretch out metallic plate and caused supporting leg telescopically to overlap contracting, also do not have outstanding metal and be suspended to clothes or skin by accidental depressing.

Claims

1. length-adjustable telescopic leg, it comprises three relative sliding part sections (10,14,16), it also comprises one a pair of section (10,14) the got loose friction gripping mechanism (24 of action between, 26), this to portion's section in, any select location be pulled out or be advanced to inner section can in another section (10), and be fixed in this position with gripping mechanism, this can make these two portion's section slide apart to extended position or slide into retracted position together to portion's section (14) in portion's section and relative slip between the 3rd portion's section (16), it is characterized in that: the use locking device (28,38) that can get loose can make above-mentioned two portion's sections (14,16) be fixed on extended position or retracted position.

2. the telescopic leg described in claim 1, the locking device that wherein can get loose comprises an elasticity installation button (28), and above-mentioned two portion's sections comprise opening (30,30 '), when opening on time, button will be ejected in the opening, button in two openings prevent portion's section relatively another section slide, press the button, locking device will get loose, thereby button just no longer is projected in the outer opening of described two portion's sections (14).

3. the telescopic leg described in claim 2, wherein the leg section section (10,14,16) make circular cross-section, anti-rotation device is loaded on two only can be in order to prevent portion's section relatively rotating of another section relatively between portion's section of two locking positions, and this relatively rotates the hole misalignment that can cause elastic button to eject.

4. the telescopic leg described in claim 1,2 and 3, wherein three portion's sections comprise: an inner section, it can slide in intermediate section (14), an outer portion part (10), intermediate section can be slided therein, friction gripping mechanism (24,26) be installed on the lower end of outer portion part (10) intermediate section is locked in any desired location of relative outer portion part, the locking device (28,38) that can get loose moves between intermediate section and inner section (14,16).

5. the telescopic leg described in claim 4, one of them leg (18) is hinged on an end of inner section, so that leg is folding and fully thereon smooth, in use, leg can also adapt to inclined surface.

6. the telescopic leg described in arbitrary as claim 1-5, wherein three portion's sections (10,14,16) length is suitable each other.

7. the telescopic leg described in arbitrary as claim 1-6 wherein provides holding device to break away from intermediate section fully in order to prevent inner section, and prevents that intermediate section breaks away from outer portion part fully.

8. the telescopic leg described in claim 1-7, the gripping mechanism that wherein rubs comprises an elastic load bar (24 with holes, 34), it is by spring (26,46) biasing makes it enter into the chucking joint, overcoming spring action by lifting (or depressing) can make it get loose from this joint, thereby bar becomes and is substantially perpendicular to leg section section (14,40), the chucking bar is placed in a shell (22,36) in, an opening (48) is arranged with near bar on the one side of shell, surround the leg section section at the regional shell of bar.

9. the telescopic leg described in claim 8, its king-rod (34) all is contained in the shell (36), and its opening (48) that just can not be projected on the shell is external like this.

10. a chair or chaise longue when two pairs of supporting legs are housed, the structure of every pair of supporting leg as claim 1-9 arbitrary as described in, a pair of supporting leg all is equipped with on the chair of sitting usually the user or every limit at chaise longue middle part.