CN207848844U - A kind of tensioner and image pickup rocker arm - Google Patents

Abstract

The utility model provides a kind of tensioner and image pickup rocker arm, is related to tension device and picture pick-up device technical field, how solves always to having the technical issues of adjustable drag by draw piece.The tensioner includes draw piece, first shell and the shaft being installed in the first shell, rolling wheel, actuator and generates the torque force limiting device for presetting pulling force to draw piece；The output end of actuator and the input terminal of torque force limiting device connect, and the output end of torque force limiting device is connect with rotating shaft transmission；Rolling wheel fixing sleeve is set in shaft, and one end winding rolling wheel of draw piece, the other end of draw piece is connect with by one end of draw piece；First shell is connected to by the other end of draw piece；Increased or constant by the both ends spacing of draw piece, draw piece is corresponding under the limitation of torque force limiting device torsion to be unreeled or static, is reduced by the both ends spacing of draw piece, actuator drives rolling wheel rotation to drive draw piece to wind in a tensioned state.

Description

A kind of tensioner and image pickup rocker arm

Technical field

The utility model is related to tension devices and picture pick-up device technical field, more particularly, to a kind of tensioner and camera shooting Rocking arm.

Background technology

Existing image pickup rocker arm can substantially divide into large, medium and small type rocking arm, with apparatus for making a video recording high ultra high-definitionization and Lightweight and unmanned aerial vehicle image universal, are gradually replaced by middle small rocker and unmanned plane in general occasion large size rocking arm.Make For largely universal middle-size and small-size rocking arm, there are still following problems.

Since rocking arm could be provided as telescopic structure, apparatus for making a video recording is installed on one end of rocking arm.With stretching for rocking arm Long, under the heavy burden effect of apparatus for making a video recording, rocking arm is easily bent, to cause the damage of rocking arm.

The balance of entire rocking arm is adjusted mainly by addition counterweight, and consumed regulating time is long；Although there is telescopic rocking arm, It is difficult to the continuous smooth camera shooting in flexible, needs to stop to continue to image after imaging and debugged rocking arm length, balance etc., Stress variation causes deformation variation that can not solve when main cause is rocker telescopic, and otherwise the structure of rocking arm will be made huge, Weight increase is very big.Simultaneously because balance fulcrum be it is fixed needs stop adjustment counterweight, it is therefore necessary to stop after adjusting It could image；Transition is difficult, or even needs dismounting that could complete transition to Web assembly；It cannot flexibly walk and take the photograph simultaneously Picture；Assembly needs more people's operations；Directly hand-held electronic stabilizer photography, although flexibly, needing to bear a heavy burden, cannot for a long time not between Disconnected camera shooting record.

After conventional rocker steel wire is hingedly tightened, pulling force is always fixed, therefore when rocking arm hoists shake upwards, takes the photograph Component caused by the gravity of camera and holder perpendicular to rocking arm can be smaller and smaller, but the reverse vertical that Wire pulling generates is drawn Power is reverse vertical pulling force phase fixed, that only video camera and holder act on the vertical stress component on rocking arm top and steel wire generates With just can real stress equilibrium, when gravity vertical stress component becomes it is small when, rocking arm top stress is just uneven, and conventional rocker is often Leveling when horizontal, but while having shaken stick up back up.

Utility model content

The first aspect of the utility model is designed to provide a kind of tensioner, with solve it is existing in the prior art such as What by draw piece always to having adjustable drag technical problem.Optimization technique side in many technical solutions provided by the utility model Many technique effects elaboration as detailed below that case can be generated.

To achieve the above object, the utility model provides following technical scheme：

Tensioner provided by the utility model, including draw piece, first shell and turn being installed in the first shell Axis, actuator, generates the draw piece torque force limiting device for presetting pulling force at rolling wheel；The output end of the actuator and the torsion The input terminal of force-limiting device connects, and the output end of the torque force limiting device is connect with the rotating shaft transmission, the rolling wheel fixing sleeve In the shaft, rolling wheel described in one end winding of the draw piece, the other end of the draw piece and described one end by draw piece Connection；The first shell is connected to the other end by draw piece；It is described by the both ends spacing increase of draw piece or constant, it is described Draw piece is corresponding under the torsion limitation of the torque force limiting device to be unreeled or static；It is described to be reduced by the both ends spacing of draw piece, it is described Actuator drives the rolling wheel rotation to drive the draw piece to wind in a tensioned state.

The utility model has the beneficial effects that by the setting of draw piece, rolling wheel, actuator, torque force limiting device and shaft, energy Enough make draw piece unreel, it is static and winding in the state of always be in tension.Torque force limiting device can generate preset drawing Power, when protruding by draw piece, the thrust generated by draw piece is more than the default pulling force of torque force limiting device, to which draw piece can be realized Action is unreeled, and then draw piece unreels growth with the stretching by draw piece.Since torque force limiting device has draw piece default draw always Power can keep stress equilibrium and avoid being bent by draw piece in the case of opposing stationary.And draw piece is in the mistake for unreeling growth To generating pulling force always by draw piece in journey, to make to keep stress equilibrium by draw piece.When being shunk by draw piece, start actuator, drives Moving part drives rolling wheel rotation, to drive draw piece winding to shorten length.The speed of draw piece winding is more than the speed shunk by draw piece, To which in by draw piece contraction process, draw piece to having pulling force always by draw piece, to make to keep stress equilibrium by draw piece.

Based on the above technical solution, the utility model can also do following improvement.

Further, the tensioner further includes reduction box, and the input terminal of the reduction box is limited with the torsion The output end of device connects, and the output end of the reduction box is fixedly mounted with the shaft.

Advantageous effect using above-mentioned further scheme is the setting of reduction box, can reduce the rotating speed of actuator while increase The pulling force of big draw piece and the rolling speed for reducing or adjusting draw piece, to make draw piece be in tension-like always in wrapup procedure State.

Further, the tensioner, the rotating speed of the actuator, the limitation torsion of the torque force limiting device, institute The transmission ratio for stating reduction box is adjustable.

Further, the tensioner further includes electricity loss brake, and the electricity loss brake loses with the actuator Electric braking connects.

Advantageous effect using above-mentioned further scheme is the setting by electricity loss brake, and dead electricity system is carried out to actuator It is dynamic, to enable actuator fast braking in dead electricity, and then draw piece is made quickly to stop winding.

Further, the tensioner further includes microprocessor, obtains the pulling force sensor of the tension of the draw piece With the acquisition draw piece and the velocity sensor by draw piece connecting pin speed, the pulling force sensor, the velocity pick-up Device, the actuator, the torque force limiting device and the reduction box are corresponding respectively to be electrically connected with the microprocessor；It is described micro- Processor corresponds to the tension obtained by the pulling force sensor and the velocity sensor and speed respectively, respectively described in control The transmission ratio for limiting torsion and the reduction box of the rotating speed of actuator, the torque force limiting device, to realize to by draw piece Adjustable drag.

The second aspect of the utility model is designed to provide a kind of image pickup rocker arm, with solve it is existing in the prior art such as What improves the technical issues of balance of rocking arm.Optimal technical scheme institute energy in many technical solutions provided by the utility model The many technique effects elaboration as detailed below generated.

To achieve the above object, the utility model provides following technical scheme：

Image pickup rocker arm provided by the utility model, including telescopic rod, balancer and as described in the utility model first aspect Tensioner, the tensioner is fixedly installed in one end of the telescopic rod, the other end of the telescopic rod and the drawing The other end of part connects；The balancer includes that shell and the clamp assemblies being respectively arranged in the clamping shell are clamped, drive Dynamic component and control assembly, the control assembly are electrically connected with the driving component and in telescopic rod inclination or equilibrium-likes Corresponding control the driving component starts or closes respectively under state, and the driving component is sequentially connected and drives with the clamp assemblies The dynamic clamp assemblies rotation；Telescopic rod described in the clamp assemblies casing pressure, and the telescopic rod movement can be driven to make The telescopic rod keeps balance, and the draw piece described in the telescopic rod telescopic process keeps the telescopic rod stress equilibrium.

Advantageous effect using above-mentioned further scheme can be made by the setting of telescopic rod, balancer, tensioner Telescopic rod stress equilibrium keeps straight and stops taking the photograph during camera shooting without operating personnel in gravitational equilibrium state automatically As being adjusted to image pickup rocker arm so that it is balanced.

Further, the image pickup rocker arm, the clamp assemblies include the first clamping member being oppositely arranged and the second folder Gripping member has accommodating space compatible with the telescopic rod shape between the first clamping member and second clamping piece, The telescopic rod wears the accommodating space and is rotated respectively with the side of the first clamping member and second clamping piece and pasted It closes；Second clamping piece is sequentially connected with the driving component；The first clamping member passes through adjusting with the clamping shell Adjustable ball connection, second clamping piece are connect component with the clamping housing into rotation up and down.

Advantageous effect using above-mentioned further scheme is by the way that setting for shell, the first clamping member and the second clamping piece is clamped It sets, telescopic rod can be made to be moved forward and backward under the drive that the first clamping member and the second clamping piece rotate, it is flat so as to adjust telescopic rod The position of weighing apparatus point, and then telescopic rod is made to achieve the purpose that balance.

Further, the image pickup rocker arm, described further includes holder, holder and mobile device, the upper end of the holder It is connect with the lower end lateral rotation of the holder, the lower end of the holder is fixedly installed in the mobile device；The clamping Shell is located in the holder and is connect with the holder vertical rotating.

Advantageous effect using above-mentioned further scheme is the setting of holder and holder, telescopic rod can be made in horizontality Under all around shake.

Further, the image pickup rocker arm, the holder use tripod, the axis of the holder to be set as flexible and push away Bar, the upper end of the axis are connect with the lower end lateral rotation of the holder.

Advantageous effect using above-mentioned further scheme is that the setting of telescopic putter is used by axis, so as to adjust The height of rocking arm.

Further, the image pickup rocker arm, the telescopic rod include the first telescopic rod and the second telescopic rod, described first The fixing end of telescopic rod is connected with the fixing end of second telescopic rod；The tensioner is installed on first telescopic rod Mobile terminal, the fixing end of the first telescopic rod and/or second telescopic rod described in the balancer casing pressure, the draw piece it is another End is connect with the mobile terminal of second telescopic rod.

Advantageous effect using above-mentioned further scheme can be made by the setting of the first telescopic rod and the second telescopic rod Telescopic rod realizes bi-directional expansion, to increase the extended length of telescopic rod, and then increases imaging area.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.

Fig. 1 is the utility model using state structure diagram；

Fig. 2 is the utility model fixed static status architecture schematic diagram；

Fig. 3 is the utility model tensioner structural scheme of mechanism；

Fig. 4 is the utility model balancer and cradle head structure schematic diagram；

Fig. 5 is the utility model clip overlooking structure diagram.

100- tensioners in figure, 2- draw pieces, 3- telescopic rods, 4- balancers, 5- holders, 6- holders, 7- supporting racks, 8- match Weight, 9- mobile devices, 10- first shells, 11- actuators, 12- torque force limiting devices, 13- reduction boxes, 14- electricity loss brakes, 15- Shaft, 16- rolling wheels, 17- shaft couplings, 18- handles, the first telescopic rods of 31-, the second telescopic rods of 32-, 33- electronic platform stabilizers, Shell is clamped in 34- video cameras, 40- accommodating spaces, 41- clamp assemblies, 42- drive components, 43- control assemblies, 44-, and 45- is adjusted Component, 71- pulleys, 72- supporting rods, 411- the first clamping members, the second clamping pieces of 412-, 421- motors, 422- worm screws, the whirlpools 423- Wheel, 431- controllers, 432- balance sensors, 433- batteries, 451- adjusting brackets, 452- adjusting rods, 453- screws.

Specific implementation mode

It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

A kind of tensioner, which is characterized in that including draw piece 2, first shell 10 and turn being installed in first shell 10 Axis 15, rolling wheel 16, actuator 11 and the torque force limiting device 12 that default pulling force is generated to draw piece 2.The output end of actuator 11 and torsion The input terminal of force-limiting device 12 connects.The output end of torque force limiting device 12 is sequentially connected with shaft 15.16 fixing sleeve of rolling wheel is set to In shaft 15.One end winding rolling wheel 16 of draw piece 2.The other end of draw piece 2 is connect with by one end of draw piece.First shell 10 connects By the other end of draw piece.By the both ends spacing increase of draw piece or constant, the correspondence under the torsion limitation of torque force limiting device 12 of draw piece 2 It unreels or static.Reduced by the both ends spacing of draw piece, actuator 11 drives the rotation of rolling wheel 16 to drive draw piece 2 in tensioning state Lower winding.

Specifically, as shown in Figure 1 and shown in Fig. 3, wherein Fig. 1 is the utility model using state structure diagram；Fig. 3 is The utility model tensioner structural scheme of mechanism.By the both ends spacing of draw piece, that is, the end that is connect with draw piece by draw piece and Spacing between the end connected by draw piece and first shell.By draw piece using can in a telescopic manner, the other end of draw piece 2 with It is connected by one end of draw piece, that is, by the telescopic end of draw piece, to draw piece and all has telescopic sky by the both ends of draw piece Between.

By the setting of draw piece 2, rolling wheel 16, actuator 11, torque force limiting device 12 and shaft 15, draw piece 2 can be made to put It is in tension always in the state of volume, static and winding.Torque force limiting device 12 can generate preset pulling force, by draw piece to When outer stretching, by draw piece generate thrust be more than torque force limiting device 12 default pulling force, to draw piece 2 can realize unreel it is dynamic Make, and then draw piece 2 unreels growth with the stretching by draw piece.Since torque force limiting device 12 has draw piece 2 default pulling force always, In the case of by the both ends constant gap of draw piece, it can keep being avoided being bent by the stress equilibrium of draw piece.And draw piece 2 is being put To generating pulling force always by draw piece during volume growth, to make to keep stress equilibrium by draw piece.When being shunk by draw piece, start Actuator 11, actuator 11 drive rolling wheel 16 to rotate, to drive the winding of draw piece 2 to shorten length.The speed that draw piece 2 is wound is more than The speed shunk by draw piece, to which in by draw piece contraction process, draw piece 2 to having pulling force always by draw piece, to make to be drawn Part keeps stress equilibrium.

One or more steel wire rope may be used in draw piece 2, naturally it is also possible to use the draw piece of other forms.

There is shaft 15 first end and second end being oppositely arranged, wherein first end and the output end of torque force limiting device 12 to pass Dynamic connection.Second end is free end.The second end of shaft 15 can stretch out in first shell 10, so as to the of shaft 15 Two end caps set and are installed with handle 18, the rotating shaft 15 by swing handle 18, and then rotate rolling wheel 16, to draw piece 2 It realizes winding and unreels.The setting of handle 18 can use handle 18 as spare without using actuator 11. Motor may be used in actuator 11, naturally it is also possible to use the actuator of other forms.Permanent magnetism may be used in torque force limiting device 12 Adjustable force moment clutch, naturally it is also possible to use the torque force limiting device of other forms.

The operation principle of tensioner 100 is, in 2 wrapup procedure of draw piece, that is, reduced by the both ends spacing of draw piece Process, starts actuator 11, and the output end of actuator 11 generates rotary motion and the input terminal of torque force limiting device 12 is driven to be driven Axis rotates, and to generate torque in the output end transmission shaft of torque force limiting device 12, rolling wheel 16 is driven to be rotated together with shaft 15, and And the rolling speed of draw piece 2 is faster than the speed reduced by the both ends spacing of draw piece, to which draw piece 2 can begin during elevator It eventually to generating a pulling force by draw piece, and then offsets by the bending stress of draw piece, keeps by the straight of draw piece.

It, all will production as long as its both ends transmission shaft has the tendency that relative rotation actually due to the characteristic of torque force limiting device 12 Raw torque, thus by draw piece 2 to generating pulling force by the telescopic end (hereinafter referred to as front end) of draw piece.In the process stretched by draw piece In, draw piece 2 by the front end pulling force of draw piece to will also be changed, as long as the thrust born a heavy burden and extended by draw piece by the front end of draw piece Resultant force be less than the predetermined pull (namely torque force limiting device 12 be arranged torque) of torque force limiting device 12, tensioner 100 it is each Component all will be static, to make to be kept the stress state of balance by the both ends constant gap of draw piece.By the both ends spacing of draw piece In the case of constant, during shaking, as long as being born a heavy burden less than or equal to the predetermined pull of torque force limiting device 12 by the front end of draw piece, Draw piece 2 remains static.Such as born a heavy burden more than the default pulling force of torque force limiting device 12, in order to avoid by draw piece by the front end of draw piece It is bent and breaks stress equilibrium, the default pulling force of torque force limiting device 12 need to be increased.

When carrying out elongation operation by draw piece, sufficiently large thrust is generated by draw piece, to make by draw piece front end bear a heavy burden and It is more than the predetermined pull of torque force limiting device 12 by the resultant force of the stretching thrust of draw piece.At this moment the transmission shaft at 12 both ends of torque force limiting device Relative rotation will be generated, rolling wheel 16 generates elevator and unreels rotation, and draw piece 2 is extended with the elongation by draw piece, but is at this moment moved In draw piece 2 will generate a scheduled constant pulling force, keep by the dynamic equilibrium posture of draw piece.It is received when by draw piece When contracting operation, while starting by draw piece retracting action, electric motor starting is needed to rotate, drives the transmission at 12 both ends of torque force limiting device Axis generates relative rotation, and while so that draw piece 2 is kept predetermined constant pulling force, rolling wheel 16, which generates, shrinks elevator trend, at this moment, due to The resultant force born a heavy burden by the front end of draw piece and stretched out thrust by draw piece is less than the pulling force of draw piece 2, and draw piece 2 is received with the contraction by draw piece Volume, 2 rolling speed of draw piece is more than by draw piece contraction speed at this time, and draw piece 2 keeps scheduled perseverance in this contraction wrapup procedure Determine pulling force, makes to remain dynamic equilibrium posture by draw piece.

Can be the structure or shape that can arbitrarily stretch by draw piece, such as the telescopic rocker arm of image pickup rocker arm, that is, it is flexible Bar, as shown in Figure 1, it can be the gravity of electronic platform stabilizer 33 and video camera 34 to be born a heavy burden by the front end of draw piece.Electronic platform The upper end of stabilizer 33 is fixedly installed in by the front end of draw piece, and video camera 34 is installed on electronic platform stabilizer 33.Pass through by The adjustment of flexible realization video camera 34 shooting area and angle of draw piece.

Tensioner 100 only just needs startup power supply when shrinking operation, thereby saving energy consumption.

Optionally embodiment further includes reduction box 13.The input terminal of reduction box 13 is defeated with torque force limiting device 12 Outlet connects.The output end of reduction box 13 is fixedly mounted with shaft 15.

Specifically, as shown in Figure 3.Gear reduction box may be used in reduction box 13, and the transmission series of reduction box 13 is ability Field technique personnel set according to needed for the utility model, the concrete structure dawn known to those skilled in the art of reduction box 13 Structure, details are not described herein.

Reduction box 13 can reduce the rotating speed of actuator 11 while increase the pulling force of draw piece 2 and reduce or adjust draw piece 2 Rolling speed, to make draw piece 2 be in tension always in wrapup procedure.Shaft 15 may be used by shaft coupling 17 with The output end of reduction box 13 connects.

The default pulling force of draw piece 2 can be led to according to by the front end heavy burden of draw piece and by the resultant force of the thrust of draw piece elongation It crosses torque force limiting device 12 to preset, or is preset simultaneously by torque force limiting device 12 and reduction box 13, and preset The process of pulling force is known to a person skilled in the art, and details are not described herein.

Further, the rotating speed of actuator 11, torque force limiting device 12 limitation torsion, the transmission ratio of reduction box 13 is adjustable Section.

Specifically, the transmission ratio of the limitation torsion of the rotating speed of actuator 11, torque force limiting device 12, reduction box 13 can pass through hand It is dynamic to adjust, it can also be adjusted by micro processor.

Optionally embodiment further includes electricity loss brake 14.Electricity loss brake 14 is braked with 11 dead electricity of actuator Connection.

Specifically, as shown in Fig. 2, electricity loss brake 14 is using structure, electricity loss brake 14 may be used in the prior art Micro electromagnetic electricity loss brake.Electricity loss brake 14 carries out dead electricity braking to actuator 11, to make actuator 11 in dead electricity Can fast braking, and then make draw piece 2 quickly stop winding.When to the winding operation of draw piece 2, electricity loss brake 14 and driving Power transmission, 14 stopping brakings, actuator 11 are able to generate rotary motion part 11 simultaneously.

Optionally embodiment further includes microprocessor, obtains the pulling force sensor of the tension of draw piece 2 and obtains and draws Part 2 with by the velocity sensor of draw piece connecting pin speed.Pulling force sensor, velocity sensor, actuator 11, torque force limiting device 12 Corresponding and microprocessor is electrically connected respectively with reduction box 13.Microprocessor is corresponding respectively to pass through pulling force sensor and velocity pick-up The tension and speed that device obtains control the rotating speed of actuator 11, the limitation torsion of torque force limiting device 12 and reduction box 13 respectively Transmission ratio.

Specifically, by the rotating speed of driver 11 and shutting down, the transmission of the limitation torsion, reduction box 13 of torque force limiting device 12 Blocking and loosen than, rolling wheel can control tensioner and adapt to be increased by draw piece both ends spacing or constant or reduce process While, control the size of tension and the change shape of tension.By draw piece 2 and draw piece 2 with installed on draw piece connecting pin Pulling force sensor, velocity sensor are simultaneously connect with microprocessor, are judged by microprocessor and controlled rotating speed, the torsion of actuator 11 The limitation torsion of limiter 12, the transmission ratio of reduction box 13, to realize the intelligent control of tensioner.Specific control mode And its effect is as follows.

By pull end i.e. draw piece 2 and by draw piece connecting pin.

Start driver 11, draw piece 2 is persistently driven to be more than by pull end distance in the speed for being drawn both ends line direction displacement (be drawn both ends distance close to for forward direction speed) when the speed of variation, wherein it is first shell 10 to be drawn the first end in both ends With the one end being connected and fixed by draw piece, second end is one end that draw piece 2 is connect with by draw piece.

Torque force limiting device 12 will promote draw piece 2 to be in tensioned state always, and continue to keep the tension of setting.

It can select a kind of variation of adjusting tension in following three kinds of modes.

The first, change tension force size can adjust the limitation torsion of torque force limiting device 12, and limitation torsion increases then tension Increase, limitation torsion reduces then tension and reduces.

Second, the output speed of driver 11 is adjusted while adjusting the transmission ratio of reduction box 13.Transmission ratio increases then Tension increases, and transmission ratio reduces then tension and reduces, the corresponding output speed speed for adjusting driver 11, to ensure draw piece 2 in quilt The speed of pull end line direction displacement is more than by the speed of pull end distance change.

The third, carries out the limitation torsion of the transmission ratio of reduction box 13, the rotating speed of driver 11 and torque force limiting device 12 Comprehensive adjustment, to obtain more accurate lasting tension requirements.

Start driver 11, driving draw piece 2 by draw both ends line direction displacement speed be less than or equal to by pull end away from When speed from variation (be drawn both ends distance close to for forward direction speed), draw piece 2 is not at tensioned state, by drawing both ends Pulling force is zero.

Under normal circumstances, when being drawn both ends and driver 11 suddenly to stop, due to the effect of inertia, will make that both ends is drawn to produce Life answers state of tension in advance, the pulling force size for answering the size of pulling force that will be set less than or equal to torque force limiting device 12 in advance.This quiet Only under state, drawn both ends and draw piece 2 all will be opposing stationary, but the input terminal of torque force limiting device 12 and output end still have phase To the trend of rotation, draw piece 2 can still be driven to generate pulling force, as long as at this moment the size of tension is no more than the setting of torque force limiting device 12 Value, value size will be depending on by the reaction force of pull end.If the tension bigger than the power that torque force limiting device 12 is set need to be obtained, The limitation torsion of torque force limiting device 12 can be increased.

Since a kind of tensioner of the utility model is solved by the both ends spacing increase of draw piece or constant or reduction situation Pull-down member keeps the problem of default pulling force, therefore can also be applied to pulling line device.It is fish hook bait by draw piece, draw piece is fishing line, Fish bites bait fish hook and is intended to distally move about, and actuator 11 starts execution winding operation simultaneously.When the strength of moving of fish is more than When the default pulling force of fishing line, fishing line elongation；When fish be short of physical strength strength of moving be decreased to the default pulling force equal to fishing line when, fishing line It is opposing stationary；When the strength of moving of fish is less than the default pulling force of fishing line, fishing line winding.No matter fishing line elongation, static or winding, Fishing line can be always maintained at predetermined pull, until the exhausted fishing line of fish withdraws bank completely, catch the fish risen to the bait.

The utility model second aspect provides a kind of image pickup rocker arm, including telescopic rod 3, balancer 4 and such as the utility model The tensioner 100 of first aspect.Tensioner 100 is fixedly installed in one end of telescopic rod 3, the other end of telescopic rod 3 and drawing The other end of part 2 connects.Balancer 4 includes clamping shell 44 and the clamp assemblies 41 being respectively arranged in clamping shell 44, drives Dynamic component 42 and control assembly 43.Control assembly 43 is electrically connected with drive component 42 and in the inclination of telescopic rod 3 or equilibrium state Lower control drive component 42 corresponding respectively starts or closes.Drive component 42 is sequentially connected with clamp assemblies 41 and drives clamping group Part 41 rotates.41 casing pressure telescopic rod 3 of clamp assemblies, and the movement of telescopic rod 3 can be driven to make telescopic rod 3 keep balance, Draw piece 2 keeps 3 stress equilibrium of telescopic rod in 3 telescopic process of telescopic rod.

Specifically, as shown in Figure 1 and Figure 4, wherein Fig. 4 is the utility model balancer and cradle head structure schematic diagram.Driving Component 42 may include motor 421, worm screw 422 and turbine 423.The output end of motor 421 and one end of worm screw 422 can pass through Shaft coupling connects.The other end of worm screw 422 engages connection with turbine 423.Turbine 423 and the coaxial fixed installation of clamp assemblies 41, And clamp assemblies 41 is driven to rotate, to drive telescopic rod 3 to be moved forward and backward.Control assembly 43 is electrically connected with motor 421, and is controlled The startup or closing of motor 421 processed.41 casing pressure telescopic rod 3 of clamp assemblies, to drive telescopic rod 3 is front and back to move using frictional force It is dynamic.

Electric pushrod in the prior art may be used in telescopic rod 3, and details are not described herein for concrete structure.

It is installed with multiple supporting racks 7 vertically upward in the fixed part of telescopic rod 3.Supporting rack 7 includes pulley 71 and branch Strut 72, the upper end for being installed on supporting rod 72 that pulley 71 rotates, the lower end of supporting rod 72 is fixedly installed in the fixation of telescopic rod 3 Portion.Part between 2 rear and front end of draw piece rides upon on pulley 71, to which draw piece 2 has in the vertical direction with telescopic rod 3 There is spacing, and then is conducive to the distribution of 3 upper-part of telescopic rod setting.In 3 elongation process of telescopic rod, draw piece 2 passes through pulley 71 Behind the direction for changing power, holds the front end of telescopic rod 3 and resist the electronic platform stabilizer and video camera of the front end of telescopic rod 3 The resultant force of gravity and telescopic rod elongation thrust, to keep the straight of rocking arm.

By the setting of telescopic rod 3, balancer 4, tensioner 100, telescopic rod 3 can be made easily to be in equilibrium-like State stops camera shooting during camera shooting without operating personnel and is adjusted to image pickup rocker arm so that it is balanced.Since this practicality is new The tensioner 100 of type first aspect can make to remain adjustable drag by draw piece, so as to make to be avoided being bent by draw piece. Therefore in the image pickup rocker arm of the utility model second aspect telescopic rod 3 be by draw piece, therefore telescopic rod 3 can keep stress equilibrium to Telescopic rod 3 is avoided to be bent.When telescopic rod 3 tilts, control assembly 43 can control drive component 42 and open and drive clamp assemblies 41 rotations, to drive telescopic rod 3 to be moved forward and backward, and then make telescopic rod 3 achieve the purpose that gravitational equilibrium.

Telescopic rod 3 has been upwards when having shaken, and the hung monopod video camera gravity in front end is to the vertical stress component of rocking lever, with angle Increase is ever-reduced, and at this moment tensioner 100 does not have scaling operation, is static always, but its interior torque force limiting device 12 Input/output terminal there is the trend relatively rotated always, to maintain the pulling force at draw piece end, vertical rocker-arm component and hung Monopod video camera gravity can also subtract the relationship that the vertical stress component of rocking arm is active force and reaction force with the increase of angle It is small, to keep the stress equilibrium of rocking arm front end, rocking arm not to tilt upward front end as conventional rocker.

Optionally embodiment, clamp assemblies 41 include the first clamping member 411 being oppositely arranged and the second clamping piece 412.There is accommodating space compatible with 3 shape of telescopic rod 40 between the first clamping member 411 and the second clamping piece 412.It is flexible Bar 3 wears accommodating space 40 and is bonded respectively with the rotation of the side of the first clamping member 411 and the second clamping piece 412.Second clamping Part 412 is sequentially connected with drive component 42.The first clamping member 411 passes through about 45 adjustable ball of adjusting part with clamping shell 44 Connection.Second clamping piece 412 is rotatablely connected with clamping shell 44.

Specifically, as shown in Figure 1 and Figure 4, cylinder may be used in the shape of telescopic rod 3, corresponding, the first clamping member 411 and second clamping piece 412 U-shaped wheel may be used.In order to increase the frictional force between U-shaped wheel and telescopic rod 3, may be used U-shaped rubber tire.In order to be conducive to adjust equalization point to telescopic rod 3, the axis of telescopic rod 3 is overlapped with 40 center of accommodating space.

The first clamping member 411 is merely capable of moving up and down under the action of adjusting part 45, to adjust accommodating space 40 Size, and then adjust to the pressure of telescopic rod 3.

Motor 421 is fixedly installed in clamping shell 44.Second clamping piece 412 is fixed and is sheathed in first axle, first The both ends of axis are rotatablely connected with clamping shell 44 respectively, and the both ends that first axle specifically may be used pass through with clamping shell 44 respectively The mode of bearing connection.Turbine 423 is arranged and is fixed in first axle and is coaxially disposed with the second clamping piece 412, therefore, pass through whirlpool The rotation of wheel 423 drives the rotation of the second clamping piece 412.Since the first clamping member 411 is pressed downward being set in the upper surface of telescopic rod 3 Telescopic rod 3, telescopic rod 3 is bonded with the side of the first clamping member 411 and the second clamping piece 412 respectively, under the action of frictional force, With the rotation of the second clamping piece 412, telescopic rod 3 is driven to be moved forward and backward.

By the way that the setting of shell 44, the first clamping member 411 and the second clamping piece 412 is clamped, telescopic rod 3 can be made first It is moved forward and backward under the drive of clamping piece 411 and the rotation of the second clamping piece 412, so as to adjust the position of 3 equalization point of telescopic rod, in turn Telescopic rod 3 is set to achieve the purpose that balance.

Further, adjusting part 45 includes adjusting bracket 451 and adjusting rod 452.One end of adjusting rod 452 and adjusting bracket 451 one end rotation connection, the other end of adjusting rod 452, which is worn, to be stretched out in clamping shell 44 and connects with clamping 44 screw thread of shell It connects.The other end of adjusting bracket 451 is open end.The first clamping member 411 is located in adjusting bracket 451 and is rotated with adjusting bracket 451 and connected It connects.

Specifically, as shown in figure 4, one end of adjusting rod 452 is rotatablely connected by one end of screw 453 and adjusting bracket 451. One end of adjusting bracket 451 offers mounting hole, screw 453 be located in adjusting bracket 451 and it is movable wear mounting hole, that is, It says, the outer diameter of screw 453 is less than the diameter of mounting hole, and the head diameter of screw is more than the diameter of mounting hole, to screw 453 Head be located in adjusting bracket 451, threaded portion can rotate in mounting hole.One end of adjusting rod 452 is located at adjusting bracket 451 Outside is simultaneously fixedly connected with the thread head of screw 453, to which adjusting rod 452 can be rotatablely connected with one end of adjusting bracket 451.

Screw rod may be used in adjusting rod 452, to push down on or pull up adjusting bracket by rotation adjusting lever 452 451, and then adjust the spacing between the first clamping member 411 and the second clamping piece 412.

Further, further include holder 5, holder 6 and mobile device 9.The upper end of holder 6 laterally turns with the lower end of holder 5 Dynamic connection, the lower end of holder 6 is fixedly installed in mobile device 9；Clamping shell 44 is located in holder 5 and vertically turns with holder 5 Dynamic connection.

Specifically, as shown in Figure 1 and Figure 4, U-shaped structure may be used in holder 5.The lower end of holder 5 passes through bearing and holder 6 The connection of upper end lateral rotation, that is to say, that the axis of bearing is overlapped with the axis of holder 5 and holder 6 respectively, to realize cloud Platform 5 can be relative to 6 lateral rotation of holder.

The both ends of clamping shell 44 are extended with connecting shaft respectively, and two connecting shafts are connect with holder 5 by bearing respectively, from And realize clamping shell 44 relative to the vertical front and back rotation of holder 5.It stretches in vertical rotating to be conducive to be clamped shell 44 The equalization point of bar 3 does not deviate, and the axis of connecting shaft passes through the center of accommodating space 40.Shell 44 is clamped is used for telescopic rod Open end or blind end may be used in the 3 other both ends worn, does not limit herein.

Further, holder 6 uses tripod.The axis of holder 6 is set as telescopic putter.The upper end of axis and holder 5 The connection of lower end lateral rotation.

Specifically, as depicted in figs. 1 and 2, wherein Fig. 2 is the utility model fixed static status architecture schematic diagram.Holder 6 Axis use electric pushrod, other structures are identical as the structure of the tripod used in the prior art.The axis of holder 6 also may be used To use two electric pushrods, the fixing end of two electric pushrods to be fixedly connected, mobile terminal is towards on the contrary, so as to realize branch Frame 6 extends up and down.

As shown in Figure 1, the lower end of axis can be fixedly mounted on electrodynamic balance vehicle, naturally it is also possible to be fixedly mounted on electricity It controls on vehicle.Electrodynamic balance vehicle and automatically controlled vehicle are product in the prior art.The lower end of axis is extended, so that three stabilizer blades merge. Operating personnel can realize the operation to image pickup rocker arm with hand steered axis and telescopic rod 3.

Electrodynamic balance vehicle may be used in mobile device 9, can also use automatically controlled vehicle.Electrodynamic balance vehicle and automatically controlled vehicle are existing There is product in technology.

In one embodiment, as shown in figure 5, wherein Fig. 5 is the utility model clip overlooking structure diagram.Holder 6 Lower end is fixedly installed in by clip 91 on electrodynamic balance vehicle.There is gap, clip 91 between two pedals of electrodynamic balance vehicle In in gap and being arranged the load-bearing axle of electrodynamic balance vehicle.

Clip 91 includes fastener 911, the first connecting plate 912 and the second connecting plate 913.The upper end of fastener 911 connects with first The upside hinge connection of fishplate bar 912.The lower end of fastener 911 and the lower side of the first connecting plate 912 are clamped.First connecting plate 912 another side is connect with a side of the second connecting plate 913, can also use integrally formed mode.Second connecting plate 913 be two, and correspondence is arranged up and down perpendicular to the first connecting plate 912 respectively.To which the second connecting plate 913 can be with The lower end of holder 6 is fixedly mounted.

Can also include seat (not shown), the lower end of seat is connected by mounting plate and 913 screw thread of the second connecting plate It connects.The side of mounting plate is threadedly coupled with the second connecting plate 913, and the top of the other side and the lower end of seat are fixedly mounted, lower part It is fixedly mounted with multiple universal wheels.To which seat can be moved with the movement of automatically controlled balance car, and then user can be sitting in On seat, foot steps on operation of the automatically controlled balance car realization to image pickup rocker arm.

As shown in Fig. 2, the lower end of axis is shunk, so that three stabilizer blade expansion can be respectively supported on ground, realization pair The fixed static of image pickup rocker arm.

Optionally embodiment, control assembly 43 include controller 431 and balance sensor 432.Controller 431 with Balance sensor 432 is electrically connected.Controller 431 is electrically connected with drive component 42.Controller 431 passes through balance sensor 432 transmission signal control drive component 42 starts or closes.

Specifically, as shown in Figure 4.Controller 431 is using existing for the control signal transmission part of drive component 42 Technology is realized that details are not described herein.The course of work of control assembly 43 is, when telescopic rod 3 is uneven, that is, when flexible Bar 3 is needed according to camera shooting after completing expanding-contracting action, and the position that balancer 4 is located at telescopic rod 3 is known as fulcrum, and side is not before and after former fulcrum Balance.Balance sensor 432 starts unbalanced signal transmission to controller 431,431 driving motor 421 of controller, drives Telescopic rod 3 is moved forward and backward, to find new fulcrum.Balance sensor 432 controls the signal transmission of balance to controller 431 431 driving motor 421 of device processed is closed.

Control assembly 43 further includes battery 433.Controller 431 and balance sensor 432 are electrically connected with the battery respectively, from And battery 433 device 431 and balance sensor 432 can power respectively in order to control.The motor 421 of drive component 42 respectively with battery 433 and controller 431 be electrically connected, to which battery 431 can be that motor 421 is powered, controller 431 controls motor 421 and open It opens and closes.

Optionally embodiment, telescopic rod 3 include the first telescopic rod 31 and the second telescopic rod 32.First telescopic rod 31 Fixing end connected with the fixing end of the second telescopic rod 32.Tensioner 100 is installed on the mobile terminal of the first telescopic rod 31.Balance The fixing end of 4 casing pressure the first telescopic rod 31 of device and/or the second telescopic rod 32.The shifting of the other end of draw piece 2 and the second telescopic rod 32 Moved end connects.

Specifically, as depicted in figs. 1 and 2.The company of the fixing end of first telescopic rod 31 and the fixing end of the second telescopic rod 32 It connects and connection type in the prior art may be used, be such as bolted.Threaded hole is opened up on the outer wall of fixing end, uses bolt Two outer walls being fixedly connected are connected.First telescopic rod 31 is formed as outer diameter one after being connected with the fixing end of the second telescopic rod 32 The one of cause, according to the position of equalization point, balancer 4, which may cover, to be pressed in the fixed link of the first telescopic rod 31, it is also possible to casing pressure In the fixed link of the second telescopic rod 32, it is also possible in the junction of two fixed links.10 sets of the first shell of tensioner 100 If the mobile terminal of the first telescopic rod 31, and threaded hole can be opened up in the mobile terminal of the first telescopic rod 31, by bolt by first Shell 10 is fixedly installed in the mobile terminal of the first telescopic rod 31.The other end of draw piece 2 with winding and can be fixed on the second telescopic rod 32 mobile terminal, or connected by other existing connection types.

It is balanced to make the front and back end of telescopic rod 3 bear a heavy burden, further includes counterweight 8.Counterweight 8 is arranged and is fixed on the first telescopic rod 31 mobile terminal, and positioned at the outside of tensioner 100.Structure in the prior art, such as clump weight may be used in counterweight 8.It is made With the position that can also determine 3 gravitational equilibrium point of telescopic rod, as possible extend the forearm of rocking arm gravitational equilibrium point.

The utility model is suitable for large, medium and small image pickup rocker arm, especially suitable for middle-size and small-size image pickup rocker arm.Telescopic rod 3 is put down Weighing apparatus can take counterweight 8 and the at any time balancer 4 of adjustment fulcrum.Telescopic rod 3 uses two automatically controlled push rods being oppositely arranged, To which rocking arm can be flexible to both ends, increase the range of rocker telescopic.And then the length of front arm is increased as much as possible, in phase Under same rocking arm length, larger range of pan range is obtained；Tensioner 4 can self-adapting stretching and stress, to 2 energy of draw piece The end end to end for enough holding telescopic rod 3, controls the deformation of telescopic rod 3, ensures mechanical performance of the telescopic rod 3 in telescopic process. The lower end of holder 6 is fixed on the electrodynamic balance vehicle that gravity's center control is walked, to realize the independent and flexible walking of image pickup rocker arm； Or the lower end of holder 6 is fixed on voluntarily or on the small-sized automatically controlled vehicle of other people controls, to make photographer's hand spare control completely Rocking arm and camera shooting；The modularized design of component, if 100 inner part of tensioner is installed in first shell 10, inside balancer 4 Part is installed in clamping shell, keeps assembly and disassembly simple；It fully achieves to stretch at any time and walks and image simultaneously at any time；It can be with Continual camera shooting record for a long time, convenient for live streaming etc..

In order to which buffering stand 6 is in the vibrations of vertical direction, to avoid vibrations when shooting, in the axis and branch of holder 6 The junction of 6 ontology of frame is equipped with buffer, and oil buffer specifically may be used.The upper end of buffer is fixed with axis to be connected It connects, the lower end of buffer is connect with 6 ontology of holder.

When cameraman manipulates image pickup rocker arm, left hand and the right hand are held in respectively on telescopic rod 3 and holder 6, are adjusted first flexible The equalization point of bar 3 and fixation simultaneously improve holder 6, to make the stabilizer blade of holder 6 leave ground and collapse, enable rocking arm with electronic Balance car moves, and then both feet set foot on the entire rocking arm of the automobile-used gravity's center control of electrodynamic balance and advance, retreat, rotate, is opposing stationary.Make Telescopic rod 3 elongates or shortens, and to control stable mode and the camera shooting direction of electronic platform stabilizer 33, realizes video camera 34 Focusing, composition and recording.With the horizontal and vertical rotation of arm adjustable telescopic rod 3, video camera 34 is made to be planned along cameraman Angle, orientation, distance, composition, focusing and track shooting, the art for reaching director and cameraman require.

In the place of substantially flat, due to electronic platform stabilizer 33, the stabilization cushioning effect of buffer and rocking arm itself Under the comprehensive function of possessed stabilization, various vibrations by a small margin are jolted and are swung and can be absorbed, camera picture It can keep stable and smooth in the action of various travelings and the shake of telescopic rod 3.

In one embodiment, telescopic rod 3 can realize that the telescopic extensions of 1.7-5 meters of distances of length shake by continuous and stable at any time It claps, it can while transverse direction and the vertical stretching motion of holder 6, the automatically controlled vehicle or electrodynamic balance vehicle walking process of telescopic rod 3 Continuous and stable images, in addition being shot with the shake up and down that traditional image pickup rocker arm has, more new bats may be implemented Track combination is taken the photograph, easily realizes that conventional rocker added track is continuously shot effect.

Due to the flexible nature of the free expansion performance and electrodynamic balance vehicle of telescopic rod 3, image pickup rocker arm is set to have more wide Scene adaptability, can walk and carry out shooting work in very narrow space (or even 1 square metre space), be suitble to The scope of shooting is wider.

The moving component action of tensioner 100, telescopic rod 3, balancer 4 and holder 6 etc. can be by electricity in the utility model Control or electronic intelligence control, or condition is created for automatically controlled and intelligent control, entire shooting process is fully able to be photographed by 1 Easy manipulation of the teacher without any heavy burden is completed.As long as cameraman grasps the driving main points of electrodynamic balance vehicle by training, it will be able to Easily control image pickup rocker arm.The energy and muscle power of photographer can more be absorbed in shooting creation.

In terms of the safety of operation, the operation of skilled electrodynamic balance vehicle can all ensure in advance, retrogressing, rotation Operator's body it is steady and safe, as the principle of hand-held balancing pole tight-wire walking, be equipped with the electrodynamic balance vehicle of telescopic rod 3 Electrodynamic balance vehicle than no any handrail has more stability, therefore is equipped with the electrodynamic balance vehicle of image pickup rocker arm than individual Electrodynamic balance vehicle has better safety.

Image pickup rocker arm fixation is mounted on automatically controlled vehicle, leveling, flexible, rotation, shift action, video camera focusing, The walking motion of shooting action and carrying electrically controlled vehicle can transfer to cameraman's remote control, just become remote shooting rocking arm machine People is adapted to the shooting of certain dangerous scenes.

Each leveling of image pickup rocker arm, tensioning, flexible, rotation, shift action, the focusing of video camera, shooting action and take Carry the walking motion of automatically controlled vehicle can transfer to computer program and artificial intelligence by installing control sensor additional on corresponding component Control becomes as an intelligent camera rocking arm robot, or even can independently be automatically performed the comprehensive of higher precision requirement, entirely The time-lapse shooting of track.

The video camera 34 of image pickup rocker arm can select 1-5 kilograms of video camera.It stretches the telescopic rod 3 of size for bigger Demand, walking shooting capacity can also give the satisfaction of part.

Image pickup rocker arm whole components and functionality module carries out modularized design, and each components and functionality module presses modularization The requirement of design may be used individually power supply and wireless control, material and be set using lightweight on the basis of meeting mechanical performance Meter such as uses almag and carbon fibre.Key position use titanium alloy, take screw thread to be screwed on, snapping connection etc. activity even Connect mode, fast and easy assembling and unloading.Since the module of telescopic rod 3 has Telescopic, storage, which can also reach, compares The boot of small volume and weight, general vehicle can deliver.With the intermediate short-range transition of primary assembly without dismounting The characteristics of, it can the directly transition of opening over.Assembly is simple rapid, each component is directly screwed on, card on, mount, fixation, auto-tensioning And automatic leveling, it hangs up properly and chain rope or bar is auxiliarily fixed.It normally only needs to complete within 3-5 minutes whole assembly works.Main body rocking arm After assembling and fixing, mounting electronic platform stabilizer 33 and video camera 34, and according to load weight, decide whether to hang counterweight again 8, the tensioner 100 at rear portion is then adjusted, so that telescopic rod 3 is kept normal straight form and rigidity, has debugged the company of controller It connects and completes assembly.It is first unclamped when use and chain rope or bar is auxiliarily fixed, you can begun to use by normal use operating steps.

In the description of the present invention, it should be understood that term "center", "upper", "lower", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", " transverse direction ", " vertical ", "horizontal", "bottom" "inner", "outside" is based on attached drawing Shown in orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or imply institute The device or element of finger must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to this reality With novel limitation.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention, It is a, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be Mechanical connection can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature and be directly above or diagonally above the second feature, or only Indicate that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.

Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power Subject to the protection domain that profit requires.

Claims (10)

1. a kind of tensioner, which is characterized in that including draw piece (2), first shell (10) and be installed on the first shell (10) shaft (15), rolling wheel (16), actuator (11) in and the torque force limiting device to the default pulling force of the draw piece (2) generation (12)；

The output end of the actuator (11) is connect with the input terminal of the torque force limiting device (12), the torque force limiting device (12) Output end and the shaft (15) be sequentially connected, rolling wheel (16) fixing sleeve is set in the shaft (15), the draw piece (2) other end of rolling wheel (16) described in one end winding, the draw piece (2) is connect with described by one end of draw piece；Described first Shell (10) connects the other end by draw piece；

Described by the both ends spacing increase of draw piece or constant, the draw piece (2) limits in the torsion of the torque force limiting device (12) Lower correspondence unreels or static；Described to be reduced by the both ends spacing of draw piece, the actuator (11) drives rolling wheel (16) rotation To drive the draw piece (2) to wind in a tensioned state.

2. tensioner according to claim 1, which is characterized in that further include reduction box (13), the reduction box (13) Input terminal connect with the output end of the torque force limiting device (12), the output end of the reduction box (13) and the shaft (15) It is fixedly mounted.

3. tensioner according to claim 2, which is characterized in that the rotating speed of the actuator (11), torsion limit The limitation torsion of device (12) processed, the transmission ratio of the reduction box (13) are adjustable.

4. tensioner according to claim 1, which is characterized in that further include electricity loss brake (14), the dead electricity system Dynamic device (14) is connected with the braking of the actuator (11) dead electricity.

5. according to claim 2 to 4 any one of them tensioner, which is characterized in that further include microprocessor, described in acquisition The pulling force sensor of the tension of draw piece (2) and the acquisition draw piece (2) and the velocity sensor by draw piece connecting pin speed, The pulling force sensor, the velocity sensor, the actuator (11), the torque force limiting device (12) and the reduction box (13) corresponding respectively to be electrically connected with the microprocessor (21)；

The microprocessor corresponds to the tension obtained by the pulling force sensor and the velocity sensor and speed respectively, point The transmission of the rotating speed of the actuator (11), the limitation torsion and the reduction box (13) of the torque force limiting device (12) is not controlled Than.

6. a kind of image pickup rocker arm, which is characterized in that including telescopic rod (3), balancer (4) and such as any one of claim 1 to 5 institute The tensioner (100) stated,

The tensioner (100) is fixedly installed in one end of the telescopic rod (3), the other end of the telescopic rod (3) and institute State the other end connection of draw piece (2)；

The balancer (4) includes the clamp assemblies that shell (44) is clamped and is respectively arranged in the clamping shell (44) (41), drive component (42) and control assembly (43), the control assembly (43) are electrically connected simultaneously with the driving component (42) Corresponding control the driving component (42) starts or closes, the drive respectively under the telescopic rod (3) inclination or equilibrium state Dynamic component (42) is sequentially connected with the clamp assemblies (41) and the clamp assemblies (41) is driven to rotate；The clamp assemblies (41) telescopic rod described in casing pressure (3), and the telescopic rod (3) can be driven mobile to make the telescopic rod (3) keep balance, The draw piece (2) described in the telescopic rod (3) telescopic process keeps telescopic rod (3) stress equilibrium.

7. image pickup rocker arm according to claim 6, which is characterized in that the clamp assemblies (41) include be oppositely arranged One clamping piece (411) and the second clamping piece (412),

Have between the first clamping member (411) and second clamping piece (412) and is adapted with the telescopic rod (3) shape Accommodating space (40), the telescopic rod (3) wear the accommodating space (40) and respectively with the first clamping member (411) and The side rotation fitting of second clamping piece (412)；

Second clamping piece (412) is sequentially connected with the driving component (42)；The first clamping member (411) and the folder Holding shell (44), adjustable ball connects up and down by adjusting part (45), second clamping piece (412) and the clamping shell (44) it is rotatablely connected.

8. image pickup rocker arm according to claim 6, which is characterized in that further include holder (5), holder (6) and mobile device (9), the upper end of the holder (6) is connect with the lower end lateral rotation of the holder (5), and peace is fixed in the lower end of the holder (6) Loaded in the mobile device (9)；The clamping shell (44) is located in the holder (5) and vertically turns with the holder (5) Dynamic connection.

9. image pickup rocker arm according to claim 8, which is characterized in that the holder (6) uses tripod, the holder (6) axis is set as telescopic putter, and the upper end of the axis is connect with the lower end lateral rotation of the holder (5).

10. image pickup rocker arm according to claim 6, which is characterized in that the telescopic rod (3) includes the first telescopic rod (31) With the second telescopic rod (32), the fixing end of first telescopic rod (31) is connected with the fixing end of second telescopic rod (32)； The tensioner (100) is installed on the mobile terminal of first telescopic rod (31), and first stretches described in balancer (4) casing pressure The fixing end of contracting bar (31) and/or second telescopic rod (32), the other end and second telescopic rod of the draw piece (2) (32) mobile terminal connection.