CN205539865U - Deployable formula lens hood - Google Patents

Abstract

The utility model discloses a deployable formula lens hood, it includes foldable chassis, radial deployment mechanism and axial deployment mechanism, foldable chassis is equipped with the spout including the first chassis and the second chassis that link to each other each other on first chassis and the second chassis, radial deployment mechanism includes support and loose pulley assembly, and the support includes many connecting rods and duo gen tape measure spring, connecting rod and tape measure spring are articulated each other in proper order to the articulated department at connecting rod and tape measure spring is installed to formation confined ring, loose pulley assembly, and cooperatees with spout on the foldable chassis, axial deployment mechanism includes piece spring unit, folding roof beam and a plurality of axle arrangement of following the support, the support links to each other through piece spring unit and folding roof beam between two liang. The utility model discloses do not contract when using, the during operation expandes into predetermined shape, but has the advantage of small auto -eject.

Description

A kind of expandable type shade

Technical field

This utility model belongs to optical system lens hood design field, can open up more particularly, to one Open type shade.

Background technology

At present, the factor affecting optical system imaging quality mainly has two kinds, and one is setting of optical texture Meter quality, two is the suppression to system veiling glare.For Space Optical System, shade and thereon Blocking ring structure is the important component part of Space Optical System, is the effective dress suppressing external veiling glare Put.Along with to the analysis of veiling glare and going deep into of research, the research of shade has obtained continuous development. In real life, shade is widely used in photography, numerous in variety, as square, circular, Petal shade etc..Along with the development of space technology also promotes the update of shade, by The common shade of fixed dimension and placement location develops into expandable shade.

Along with the raising of detector sensitivity, Photodetection system especially space Photodetection system Detectivity is own through the diffraction limit close to or up optical system, now presses down optical system veiling glare Ability processed proposes harsher requirement.Increasing shade length is a kind of the most effective method, But owing to the lift-off mode of current Space Optical System is rocket delivery lift-off, and the appearance of rocket carrying compartment Measuring limited, this just requires that shade will be the least in quality and the size of emission state, and lift-off is gone forward side by side Entering the size after duty and then need longer, this is accomplished by improving shade, when i.e. launching For folding storage state, the most progressively launch after injection so that it is there is scalability.

In prior art research design some carry out formula shade, such as, CN201210019011.5 Disclosed a kind of deployable shading cover structure of space large caliber, this shade possesses contraction and launches, in-orbit The function launched, optimizes the air interface relation of shade and satellite fairing；And for example, CN A kind of deployable rotatable wedge shape shade of segmentation disclosed in 201310288763.6, this shade exists It is in contraction state before transmitting, uses straight line hinge mode to launch cylinder along axis direction segmentation the most afterwards Part and oblique angle part, oblique angle part, by the location of the sun is constantly adjusted attitude, makes minor face deviate from The sun, is formed sunlight and covers, efficiently solve veiling glare and heat flow problem that the sun causes； And for example, a kind of Pop-up shade disclosed in CN201310331513.6, it includes multiple sleeve, company Connecing substrate, telescopic folding beam and spring assembly, the diameter of each joint sleeve is sequentially reduced, during installation at In contraction state, during work, eject into the shape of requirement.But above-mentioned existing shade all can only be real Existing axially expanded, it is impossible to realize radial development, however it remains volume is excessive, excessively complicated the asking of structure Topic.For another example, a kind of collapsible and optical camera shade of expansion disclosed in CN200910022264.6, Although it can realize expansion axially and radially, but owing to this shade uses the additional shading of frame structure The form of cloth, the ability that gobo resists adverse circumstances is weak, and the range making total is limited, Blocking ring structure can not be added so that the light shielding ability of this shade is restricted.

Utility model content

For disadvantages described above or the Improvement requirement of prior art, this utility model provides a kind of deployable Formula shade, this shade is by arranging radial development mechanism and axially expanded mechanism, and coordinates folding Formula chassis so that shade shrinks when unused state, is launched into the most rapidly reservation shape, Have volume little, can the advantage of automatic spring, meet being actually needed of Space Optical System.

For achieving the above object, the utility model proposes a kind of expandable type shade, this shade Including Collapsible chassis, radial development mechanism and axially expanded mechanism, wherein:

Described Collapsible chassis includes the first chassis and the second chassis being connected with each other, described first chassis It is provided with chute with the second chassis；

Described radial development mechanism includes that support and pulley assembly, described support include that many connecting rods are with many Root Tape spring, described connecting rod and Tape spring are the most mutually hinged, to form the ring closed, described Pulley assembly is arranged on the hinged place of connecting rod and Tape spring, and matches with the chute on Collapsible chassis Close；

Described axially expanded mechanism includes leaf spring assemblies, folded beam and multiple axially disposed institute Stating support, described support is connected with folded beam by leaf spring assemblies between any two.

As it is further preferred that be additionally provided with locking mechanism, described locking on described Collapsible chassis Mechanism includes that torsion spring, link member and boss, described torsion spring are located on the first chassis, and described boss is located at On second chassis, one end of described link member is connected with torsion spring, and the other end abuts with boss.

As it is further preferred that described second chassis is six, six the second chassis are along described One chassis is circumferentially.

As it is further preferred that described pulley assembly includes roller arm and pulley, described roller arm with Connecting rod is connected with the hinged place of Tape spring, and the end of roller arm is located at by described pulley, and with described cunning Groove is slidably matched.

As it is further preferred that be embedded with a circle ball on described pulley, the end of this ball and chute Face contacts.

As it is further preferred that described leaf spring assemblies be located at upper and lower two supports two connecting rods it Between, it includes that the multipair flat spring being sequentially connected, every pair of flat spring are made up of two panels flat spring, two panels The two ends of flat spring are connected with each other.

As it is further preferred that described folded beam is located between two connecting rods of upper and lower two supports, It includes that upper beam, intermediate beam and underbeam, described upper beam, intermediate beam pass sequentially through hinge with underbeam and be connected.

As it is further preferred that described connecting rod and Tape spring are the six roots of sensation, when radial development mechanism During contraction, the radial dimension of shade is the hexagon of six roots of sensation connecting rod composition, when the exhibition of radial development mechanism When opening, the radial dimension of shade becomes the dodecagon being made up of six roots of sensation connecting rod and six roots of sensation Tape spring.

In general, by the contemplated above technical scheme of this utility model compared with prior art, Mainly possess following technological merit:

Shade the most of the present utility model is in when not using axially and way contracting state radially, Comparing existing shade, volume reduces further, during work shade can quickly from axially and Radially eject into predetermined shape, and axially expanded and radial development mechanism is separate, do not do mutually Relate to, both ensure that the shading performance that shade is good, solve again a difficult problem for its delivery inconvenience, have Volume is little, can the advantage of automatic spring, meet being actually needed of Space Optical System.

Chassis the most of the present utility model is Collapsible chassis, and when shade does not uses, this chassis is folding Overlapping state, the first chassis and the second chassis are 90 ° of angles, by radial development mechanism and axially expanded machine Structure is wrapped in inside, makes the volume of shade minimize as far as possible, when shade uses, and second Take advantage of a situation and be launched into petal-shaped in chassis, now, the second chassis and the first chassis in same level, for Radial development mechanism provides the track needed for operation so that radial development mechanism is according to predetermined route Eject predetermined shape.

Radial development mechanism the most of the present utility model is made up of connecting rod and Tape spring, and shade does not uses Time, Tape spring curves inwardly folding, makes the radial dimension of shade be only many connecting rods compositions many Limit shape, reduces the size of shade further, when shade works, utilizes Tape spring to discharge Elastic potential energy, can promote connecting rod to move radially, make the radial dimension of shade become by connecting rod and The polygon of Tape spring composition, it is achieved shade rapid deployment radially, and so that shading Cover is launched into predetermined shape, is provided with in the hinged place of connecting rod and Tape spring and is slidably matched with chassis Pulley assembly, it is ensured that radial development mechanism according to projected route launch, there is simple in construction, behaviour Make the advantages such as convenient.

Axially expanded mechanism the most of the present utility model is provided driving force by spring assembly, convenient and swift, this Utility model also coefficient of elasticity to spring assembly makes reasonably design, to avoid axially expanded mechanism The short time set amount causing structure after deployment owing to speed is excessive is excessive, thus causes shade forever Deformation for a long time, and by arranging extension type folded beam, to ensure its fully unfolded position；Spring assembly exists Expansion process still has remaining elastic strain energy after completing so that folded beam will not shrink after deployment, Folded beam has higher support stiffness after deployment simultaneously so that spring assembly is always maintained at compressive state, Both mutually limit, it is achieved self-locking, thus ensure the stability of shade radial development.

5. the expansion on this utility model chassis uses driven by servomotor, it is ensured that velocity-stabilization, position Accurately, and utilize decelerator to improve moment of torsion, thereby may be ensured that chassis stablizing in the process of expansion Property；This utility model utilizes torsion spring drivening rod to move, after the second chassis is fully deployed, and connecting rod top Live boss so that chassis is fixed on after launching and determines position, keeps lock-out state, and its mechanism is simple, But operability is the strongest.

Accompanying drawing explanation

Fig. 1 is front view during the carried out formula shade contraction of this utility model embodiment；

Fig. 2 is top view during the carried out formula shade contraction of this utility model embodiment；

Fig. 3 is front view during the carried out formula shade expansion of this utility model embodiment；

Fig. 4 is top view during the carried out formula shade expansion of this utility model embodiment；

Fig. 5 is body chassis schematic diagram of the present utility model；

Fig. 6 is drive mechanism schematic diagram of the present utility model；

Fig. 7 is locking mechanism schematic diagram of the present utility model；

Fig. 8 (a) and (b) are stent collapses of the present utility model and schematic diagram when launching respectively；

Fig. 9 is pulley block structure schematic diagram of the present utility model；

Figure 10 is axially expanded structural scheme of mechanism of the present utility model；

Figure 11 is leaf spring assemblies structural representation of the present utility model；

Figure 12 is folded beam structural representation of the present utility model.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with Drawings and Examples, are further elaborated to this utility model.Should be appreciated that this place is retouched The specific embodiment stated, only in order to explain this utility model, is not used to limit this utility model.This Outward, if technical characteristic involved in each embodiment of this utility model disclosed below that The conflict of not constituting between this just can be mutually combined.

As Figure 1-4, a kind of expandable type shade that this utility model embodiment provides, it is main Collapsible chassis to be included, radial development mechanism and axially expanded mechanism, wherein, Collapsible chassis is made For the support member of whole shade, provide support force for other assemblies in shade, and be footpath Operation track required when development mechanism provides it to launch, described radial development mechanism is used for realizing hiding The radial development of light shield, makes the radial dimension of shade reach predetermined size, described axially expanded machine Structure is for realizing the axially expanded of shade, and two development mechanisms rely primarily on spring to be carried out as power Drive.By cooperating of each assembly above-mentioned and mechanism, shade can be realized at the delivery stage In contraction state, can quickly eject during work, and by arranging radially and axially expanded mechanism, The shade radial direction when non-working condition can be made and be axially in compressive state, further reducing The volume that shade is overall.Shade of the present utility model can be applicable to Space Optical System, at this sky Between optical system by rocket delivery lift-off time, shade is in contraction state, i.e. when emission state receive Contracting, is launched into rapidly predetermined shape during work.

Respectively all parts will be described in detail and describe below.

As it is shown in figure 5, Collapsible chassis includes the first chassis 1 and the second chassis 2, both can pass through example As hinge 4 is connected, the first chassis 1 and the second chassis 2 are provided with chute 3.Wherein, first end Dish 1 for example, circular plate type, it is horizontally disposed, and the second chassis 2 is preferably six, six the second chassis Along the first chassis circumferentially, when Collapsible chassis folds, the second chassis 2 is folded up, Now the angle on the second chassis 2 and the first chassis 1 is 90 ° (the i.e. second chassis is arranged vertically), when When Collapsible chassis launches, six the second chassis 2 are distributed in the circumference on the first chassis in petal-shaped, its Horizontally disposed, and with the first chassis 1 in same level, owing to chassis is fully deployed, second end The horizontal plane of dish 2 and the first chassis composition defines a complete operation track, can make support edge Track sliding moves on to specify position.

In order to realize launching smoothly and shrinking of the second chassis, it is provided with drive mechanism, such as Fig. 6 Shown in, this drive mechanism includes servomotor, decelerator and two connecting rods (stock and quarter butt), watches Taking motor to be arranged on the first chassis, it is connected with decelerator, utilize servomotor guarantee velocity-stabilization, Position is accurate, also utilizes decelerator to improve moment of torsion, it is ensured that stable movement, the outfan of decelerator simultaneously Being connected with quarter butt, quarter butt is connected with stock, and stock and the second chassis are connected.During work, servomotor Drive, drive two bar motions through decelerator, and then drive the second chassis to complete 90 degree of rotations.

For the ease of the locking on the second chassis, improve stability of strutting system, at first chassis 1 and second end Dish 2 folds intersection and arranges locking mechanism, as it is shown in fig. 7, this locking mechanism includes torsion spring 18, connects Rod member 19 and the boss 20 being located on the second chassis, torsion spring 18 is located on the first chassis, link member 19 One end be connected with torsion spring 18, the other end abuts against with boss 20.In the pre-deployed, torsion spring storage A part of elastic potential energy, is squeezed in the boss (platform of link member and boss on second chassis by link member Face abuts against) on, along with the expansion on the second chassis, torsion spring drivening rod part moves, link member along The table top slide downward of boss, after the second chassis is fully deployed, link member just withstands the second chassis The side of boss, so that the second chassis rests in defined location, keeps lock-out state.When After chassis is fully deployed, the external world moment of flexure that causes, moment of torsion, shearing by link member with concentration power shape Formula is transmitted, and chassis development mechanism no longer works.

As shown in Fig. 8 (a)-(b), radial development mechanism includes that support 5, support 5 include many Connecting rod 6 and Duo Gen Tape spring 7, connecting rod 6 and Tape spring 7 are the most mutually hinged, to form closing Ring.Concrete, connecting rod 6 and Tape spring 7 are both preferably the six roots of sensation, when radial development mechanism shrinks Time, Tape spring 7 curves inwardly folding, makes the radial dimension size of shade be only six roots of sensation connection rod set The hexagon size become, the hexagon of six roots of sensation connecting rod composition is positioned at the top on the first chassis, and by six Individual second chassis surrounds, and when radial development mechanism deploying, Tape spring 7 discharges elastic potential energy, and six Root Tape spring promotes connecting rod to move radially, make the radial dimension of shade become by six roots of sensation connecting rod and The dodecagon of six roots of sensation Tape spring composition, six roots of sensation connecting rod and the dodecagon of six roots of sensation Tape spring composition It is positioned at the top on the second chassis, thus achieves the radial development of shade.After support struts completely, Tape spring is provided that again certain rigidity, it is ensured that the stability of radial structure.

Due to radial development rely on be Tape spring release elastic potential energy, so connecting rod 6 and volume The lower end, hinged place of chi spring 7 devises pulley assembly, this pulley assembly and the fortune on Collapsible chassis Row track (i.e. chute) matches, and its effect is to reduce the frictional force during radial development, and Whole shade is played axial restraint effect.

As it is shown in figure 9, pulley assembly includes roller arm 8 and pulley 9, roller arm 8 and connecting rod 6 and volume The hinged place of chi spring 7 is connected, and the end of roller arm 8 is located at by pulley 9, and joins with chute 3 slip Close, this pulley 9 is also embedded with a circle ball 10, this ball 10 and the end contact of chute 3, roll Pearl is specifically inlaid in the middle part of roller, embeds a circle ball at the middle part of roller, had both played axial restraint Effect, the side-friction resistance during radial development can be reduced again.

As shown in Figure 10, axially expanded mechanism includes leaf spring assemblies 16, folded beam 17 and multiple Support 5, wherein, multiple supports 5 successively along shade axial arranged (being the most vertically sequentially overlapped), The support being positioned at the bottom is provided with the described pulley assembly coordinated with chassis, logical between upper and lower two supports Cross leaf spring assemblies to be connected with folded beam.

As shown in figure 11, leaf spring assemblies is the power set of shade, has enough elastic force, it is possible to Making shade be launched into the shape of needs from the compressive state started, meanwhile, spring assembly was launching Journey still has remaining elastic strain energy after completing, and i.e. also in compressive state, is conducive to improving shade Stability.Concrete, leaf spring assemblies is located between two connecting rods 6 up and down of upper and lower two supports, It includes the multipair flat spring 11 being sequentially connected, and the use of multipair flat spring adds single flat spring Collapsing length, also ensure that the high resiliency of spring assembly.Every pair of flat spring is made up of two panels flat spring 12, The initial condition of flat spring 12 is circular arc, completely near linear shape after compression, and two panels flat spring 12 Two ends be connected with each other, the concrete mode using hinge or sheet metal pressing connects to ensure that spring can To compress completely.

Leaf spring assemblies in ejection process, acceleration be always on the occasion of, the speed of ejecting structure is always Increasing, therefore, spring assembly also ensure that speed when having launched in the reasonable scope, with The short time set amount exempting to cause after deployment structure owing to speed is excessive is excessive, causes the permanent of shade Deformation, thus need the coefficient of elasticity of spring assembly is made reasonably design.Specifically use such as lower section Formula is designed:

$F=k\·\mathrm{\Δ}x=m\·a=mv\frac{dv}{dx};$

$v^2=\frac{k}{m}(x_2+x_1-2x_0)(x_2-x_1);$

$k=\frac{{\mathrm{mv}}^2}{(x_2+x_1-2x_0)(x_2-x_1)};$

In formula: F is the elastic force of spring, k is the coefficient of elasticity of spring, and m is spring-mass, and a is bullet Spring motion brief acceleration, speed when v is spring movement, x₀For the drift of spring, x₁Exist for spring Length under compressive state, x₂For spring length under its fully unfolded position.

As shown in above formula, square being directly proportional to coefficient of elasticity k of spring, owing to speed is by really of speed Fixed have higher limit within the specific limits, and other parameters are known, thus can be at certain nargin model Enclose the value of interior coefficient of elasticity k determining spring according to velocity amplitude, and then reasonable design spring assembly.

Further, folded beam is the critical component connecting adjacent two layers radial development mechanism, is one Combinative structure, is located between two connecting rods 6 up and down of upper and lower two supports, as shown in figure 12, and its bag Including upper beam 13, intermediate beam 14 and underbeam 15, upper beam 13, intermediate beam 14 and underbeam 15 pass sequentially through Hinge is connected, and when fully unfolded, folded beam, in the case of ensureing deployed condition, bears relatively simultaneously Big axial tension and axial compressive force, thus realize self-locking.

The specifically used method of shade of the present utility model will be described in detail below.

First, in the pre-deployed, the first chassis and the second chassis are connected to each other, and vertically put, work as satellite Arrive specify position time, servomotor pass through decelerator drive link, thus drive the second chassis around First chassis rotates, and when the second chassis 90-degree rotation, when being generally aligned in the same plane with the first chassis, is formed One complete operation track, at this moment servomotor quits work, and during launching, turns round Spring promotes link motion, until connecting rod withstands on the boss on the second chassis just, makes the second chassis keep Lock-out state, the moment of flexure so caused by the external world, moment of torsion, shearing are passed with concentration power form by connecting rod Passing, chassis development mechanism no longer works；

Secondly, defining a complete operation track when chassis is fully deployed, at this moment Fire Control Device opens Dynamic, the cord break of binding shade, Tape spring release elastic potential energy, promote baffle bracket edge Moving radially, bottom support, under the guiding of pulley assembly, makes the radial dimension of shade become by 6 Root connecting rod and the dodecagon size of 6 support compositions；After expansion support struts completely, tape measure bullet Spring is provided that again certain rigidity, it is ensured that the stability of radial structure；Simultaneously as binding shade Cord break, in axially expanded mechanism spring assembly release store elastic potential energy, promote shading Cover stent launches vertically, and spring assembly can make shade be launched into needs from the compressive state started Shape, it still has remaining elastic strain energy after axially expanded process completes simultaneously so that fold Beam will not shrink after deployment, and folded beam has higher support stiffness after deployment so that spring Assembly is always maintained at compressive state, and both mutually limit, it is achieved self-locking, thus ensures that shade is radially The stability launched.

As it will be easily appreciated by one skilled in the art that and the foregoing is only preferred embodiment of the present utility model , not in order to limit this utility model, all made within spirit of the present utility model and principle Any amendment, equivalent and improvement etc., within should be included in protection domain of the present utility model.

Claims (8)

1. an expandable type shade, it is characterised in that this shade includes Collapsible chassis, footpath To development mechanism and axially expanded mechanism, wherein:

Described Collapsible chassis includes the first chassis (1) and the second chassis (2), the institute being connected with each other State the first chassis (1) and the second chassis (2) are provided with chute (3)；

Described radial development mechanism includes support (5) and pulley assembly, and described support (5) includes many Root connecting rod (6) and many Tape springs (7), described connecting rod (6) and Tape spring (7) are successively Mutually hinged, to form the ring closed, described pulley assembly is arranged on connecting rod (6) and Tape spring (7) Hinged place, and match with the chute (3) on Collapsible chassis；

Described axially expanded mechanism includes leaf spring assemblies (16), folded beam (17) and multiple edge Axial arranged described support (5), described support is between any two by leaf spring assemblies and folded beam phase Even.

2. expandable type shade as claimed in claim 1, it is characterised in that described folding bottom Be additionally provided with locking mechanism on dish, described locking mechanism include torsion spring (18), link member (19) and Boss (20), described torsion spring (18) is located on the first chassis, and described boss (20) is located at second On chassis, one end of described link member (19) is connected with torsion spring (18), the other end and boss (20) Abut.

3. expandable type shade as claimed in claim 2, it is characterised in that described second chassis (2) being six, six the second chassis are along described first chassis circumferentially.

4. expandable type shade as claimed in claim 3, it is characterised in that described pulley assembly Including roller arm (8) and pulley (9), described roller arm (8) and connecting rod (6) and Tape spring (7) hinged place is connected, and the end of roller arm (8) is located at by described pulley (9), and with described cunning Groove (3) is slidably matched.

5. expandable type shade as claimed in claim 4, it is characterised in that described pulley (9) On be embedded with a circle ball (10), the end contact of this ball (10) and chute (3).

6. expandable type shade as claimed in claim 1, it is characterised in that described flat spring group Part (16) is located between two connecting rods (6) of upper and lower two supports, and it includes multipair being sequentially connected Flat spring (11), every pair of flat spring is made up of two panels flat spring (12), two panels flat spring (12) Two ends be connected with each other.

7. expandable type shade as claimed in claim 1, it is characterised in that described folded beam (17) Being located between two connecting rods (6) of upper and lower two supports, it includes upper beam (13), intermediate beam (14) With underbeam (15), described upper beam (13), intermediate beam (14) and underbeam (15) pass sequentially through conjunction Page is connected.

8. expandable type shade as claimed in claim 7, it is characterised in that described connecting rod (6) Being the six roots of sensation with Tape spring (7), when radial development mechanism shrinks, the radial dimension of shade is The hexagon of six roots of sensation connecting rod composition, when radial development mechanism deploying, the radial dimension of shade becomes The dodecagon being made up of six roots of sensation connecting rod and six roots of sensation Tape spring.