CN205457399U - A pushing mechanism and drive arrangement for swivel chair tray - Google Patents

Abstract

The utility model discloses a pushing mechanism and drive arrangement for swivel chair tray, pushing mechanism is including the stress block that rotate to set up and rotate the ejector pad that sets up, the ejector pad cooperate with stress block and pivot between them mutually perpendicular, block between ejector pad and stress block and be equipped with the ball, the ball both sides remain the contact throughout with ejector pad, stress block respectively, and the ball makes and keeps the interval between ejector pad and the stress block. The utility model provides a two are rotated ejector pad and the stress block who sets up to the ball is established to the card between the two, and when the ejector pad cooperated with stress block, the ball can take place to rotate, can further reduce frictional force, thereby made the cooperation between bogie and the swing span more smooth and easy.

Description

Pushing mechanism and driving means for Revolving chair tray

Technical field

This utility model relates to swivel chair, office chair technical field, particularly to a kind of pushing mechanism for Revolving chair tray And driving means.

Background technology

Revolving chair tray, also referred to as Revolving chair chassis, be installed in a vitals below swivel chair seat cushion, the lifting of seat cushion, lean on The elevation angle regulation of the back of the body is all dependent on what pallet completed.

Such as, Chinese patent (notification number: CN2922618) discloses one: " lifting and reclining Chair underpan ", this chair Pallet is that knob is fixed on upper dish by CARRIAGE BOLTS by upper dish, mid-game and knob composition, dust cover, washer and spring peace It is contained in mid-game；Back steel sheet seat 21 is rotationally connected with mid-game, and back steel sheet seat 21 connects upper dish further through U-shaped bracing frame 20 simultaneously 18, during chair reclining, back steel sheet seat 21 rotates around mid-game, pulls on down dish 18, makes dish 18 rotate around mid-game, back steel sheet seat 21 rotation amplitudes are big, and upper dish 18 rotation amplitude is little, and people is sitting on chair when falling backward, above the waist, the lower part of the body more unfold, on Half body can have reclining by a relatively large margin so that people's entirety feels the most comfortable.

In above-mentioned patent, reset response is played in chair reclining by spring, and it can be seen that knob, bullet from this patent Spring and CARRIAGE BOLTS be substantially vertical or almost vertical being arranged on pallet, the i.e. axis of knob, spring and CARRIAGE BOLTS with Angle formed by mid-game or seat support is 70～90 degree, and the reset of chair reclining is made by the elastic force to regulation spring with regulation spring Time firmly, need to squat down or bend by turning knob with adjusting knob upper-lower position on CARRIAGE BOLTS, thus regulate bullet The compression degree of spring to regulate the spring reset response power to chair reclining, inconvenient operation, the most arduously, and especially for Bend to regulate posture for women unbecoming, a lot of in the case of will not go regulation rotation owing to drawbacks described above directly results in user Button, therefore directly results in the waste of above-mentioned functions.

Notification number is: the Chinese patent of " CN102090805 " is improved, it is provided that a kind of adjustable seat of reclining power Chassis, it includes mid-game and deep bid, and the rear portion of deep bid can be around the shaft relative to mid-game swung downward, and the lower front of mid-game is provided with Knob, knob has cavity, is provided with the installing plate fixing with knob in the cavity of described knob, and knob is corresponding to below installing plate Position be provided with worm gear, described worm gear can be around own axes relative to knob；Its utility model is characterized by: corresponding in knob Being provided with the worm screw engaged with worm gear by worm gear, handle one end enters to be connected with described worm-drive in knob from knob is overhanging, adjusts Joint bolt sequentially pass through the installing plate in deep bid, mid-game and knob from top to bottom after and described worm gear between screw thread match, institute Stating regulation bolt coaxial with worm gear, regulation bolt is arranged with helical spring corresponding to the position below mid-game and more than installing plate.

By such improvement, it is not necessary to bend, it is only necessary to stretch out one's hand turning handle can by worm and gear regulation bolt to Go up or move down, thus the compression degree of adjustable screw spring.Equally, notification number is: " CN201602417 ", utility model Entitled: the utility model patent of " worm and gear adjusting swivel chair tray " also has similar improvement, and adjusting handle, in seat side edges, makes User is without squatting down or bend i.e. scalable.

But above-mentioned patent has the common shortcoming to be: knob, spring and regulation bolt are substantially vertical or intimate perpendicular Directly it is arranged on pallet, say, that angle formed by knob, spring and axis and the pallet of regulation bolt or seat support is 70 ～90 degree, so from the point of view of chair front or two sides, can will be apparent from sees the knob exposed below pallet, the most beautiful See, also reduce the class of product to a certain extent, it is impossible to adapt to that people improve day by day again to succinct the wanting of chair appearance Ask；Further saying, such version is in irregular shape, is unfavorable for improving vanning amount, and protruding knob causes packing crates Directly thicken, and cabinet interior has many places to be all empty in fact, wastes cabinet interior space, adds cost of transportation.Enter again One step is said, such version, and user needs deeply to bend over to stretch out one's hand into seat surface bottom or stand from chair and squat down Seat surface bottom rotary knob, uses the most not humane, the convenience that impact uses.

Ad hoc meter one Revolving chair tray, including base and the bracket that is connected with base rotation, additionally can arrange seesaw, be Arranging a swing span and horizontally disposed adjusting screw rod in pallet, one end of adjusting screw rod is inserted in the base of pallet, regulation The other end of screw rod is exposed to outside base, and the part that adjusting screw rod is exposed to outside base is arranged with spring, and adjusting screw rod exposes On thread segment outside base, threaded engagement has to regulate the nut of spring initial deformation degree；Swing span lies low and is arranged on the end In seat and the middle part of swing span is hinged with base, one end of swing span is hinged with this end of adjusting screw rod inserted base, seesaw or Bracket is with a bogie extending in base, and when seesaw rotates, the driven moving frame of the other end of swing span is driven such that swing Frame rotates, and then drives adjusting screw rod to move the restoring force promoting camber of spring to form seesaw.

It is to drive by bogie that swing span rotates, and in initial scheme, is to arrange a bearing pin in bogie lower end, and at pendulum This end that moving frame matches arranges another bearing pin, and two bearing pins are arranged in a crossed manner, and a bearing pin promotes another bearing pin so that bogie pushes away Movable pendulum moving frame swings, but the frictional force that this mode produces is relatively big, can lose thrust, and both cooperations are the most smooth and easy.

Utility model content

This utility model overcomes the deficiency in the presence of above-mentioned prior art, it is provided that a kind of reduction frictional force, makes to join Close the more smoothly pushing mechanism for Revolving chair tray and driving means.

The technical solution of the utility model is achieved in that

For the pushing mechanism of Revolving chair tray, including rotating the force block arranged and rotating the pushing block arranged, pushing block be subject to Power block matches and both rotating shafts are perpendicular, is arranged with ball between pushing block and force block, ball both sides respectively with pushing block, Force block remains contact, and ball makes to keep between pushing block and force block interval.Rotation setting refers to: force block with push away Block all can be around the axis of rotation of self.

As preferably, described force block has stress surface, and described pushing block has force surface, at stress surface and force surface On be respectively equipped with arcuate groove, the part cambered surface of ball both sides is stuck in two arcuate grooves, and two arcuate grooves is maximum deep Degree is respectively less than the radius of ball.Stress surface refers to relative two sides with force surface, and stress surface and force surface are plane herein, with Conveniently offering arcuate groove to coordinate with ball, arcuate groove just matches with sphere, and the depth capacity of two arcuate grooves is respectively less than ball Radius so that between stress surface and force surface keep certain intervals, thus make pushing block the most logical with force block Cross ball to match, it is to avoid directly contact.

As preferably, described ball is the metal ball of smooth outer surface.So can bear enough pressure, it is possible to fall Low friction.

For the driving means of Revolving chair tray, including bogie, swing span and pushing mechanism as above, bogie with Bracket or seesaw are connected, and in the middle part of swing span, the base with pallet is hinged, are provided with in bogie lower end for promoting the of swing span Three bearing pins, pushing block turning set is located on the 3rd bearing pin；This end coordinated with bogie at swing span is provided with the second bearing pin, stress Block turning set is located on the second bearing pin, and the 3rd bearing pin and the second bearing pin are vertically arranged.

As preferably, described force block has stress surface, and described pushing block has force surface, at stress surface and force surface On be respectively equipped with arcuate groove, the part cambered surface of ball both sides is stuck in two arcuate grooves, and two arcuate grooves is maximum deep Degree is respectively less than the radius of ball.

As preferably, described ball is the metal ball of smooth outer surface.

Have employed design starting point of the present utility model, the theory of technique scheme and provide the benefit that:

This utility model provides two and rotates the pushing block and force block arranged, and card sets ball between, is pushing away When block coordinates with force block, ball can rotate, and can reduce frictional force further, so that between bogie and swing span Cooperation more smoothly.

Further saying, being respectively equipped with arcuate groove on force block with pushing block, the depth capacity of two arcuate grooves is respectively less than The radius of ball so that keep certain intervals between stress surface and force surface, thus makes pushing block with force block between the two Only matched by ball, it is to avoid directly contact.

Accompanying drawing explanation

Fig. 1 is the perspective view of pallet in embodiment 1；

Fig. 2 is the perspective view of another angle of pallet in embodiment 1；

Fig. 3 is the internal structure schematic diagram of pallet in embodiment 1；

Fig. 4 is the perspective view of another angle of pallet in embodiment 1；

Fig. 5 is the inner plane structural representation of side-looking direction pallet in embodiment 1；

Fig. 6 is the inner plane structural representation overlooking direction pallet in embodiment 1；

Fig. 7 is to represent the structural representation that seesaw is connected with bracket in embodiment 1；

Fig. 8 is the chassis interior stereoscopic-state schematic diagram of pallet in embodiment 1；

Fig. 9 is the stereoscopic-state schematic diagram of another angle of chassis interior of pallet in embodiment 1；

Figure 10 is the disassembled form schematic diagram of base in embodiment 1, bracket, swing span；

Figure 11 is swing span and adjusting screw rod, the connection status schematic diagram of spring in embodiment 1；

Figure 12 is the explosive view of pallet in embodiment 1；

Figure 13 is the disassembled form schematic diagram of seesaw in embodiment 2, ball and swing span；

Figure 14 is the disassembled form schematic diagram of seesaw in embodiment 2, ball and another angle of swing span；

Figure 15 is the mated condition schematic diagram of seesaw in embodiment 2, ball and swing span；

Figure 16 is the mated condition sectional view of seesaw in embodiment 2, ball and swing span；

Figure 17 is the mated condition sectional view of seesaw in embodiment 2, ball and another angle of swing span；

Figure 18 is the internal structure schematic diagram of base in embodiment 3.

Detailed description of the invention

Detailed description of the invention of the present utility model is as follows:

First define the reference azimuth of this utility model critical piece, this utility model by pallet and swivel chair in normal mounting During use, the front of swivel chair is front end, and the rear of swivel chair includes seesaw, the position at backrest place is rear end, the front end of pallet For the region away from backrest, the rear end of pallet is the region near backrest.

Embodiment 1: pushing mechanism of the present utility model and driving means are the important component part of Revolving chair tray, below right Revolving chair tray does detailed introduction: present embodiments provide a kind of Revolving chair tray, as shown in Fig. 1～12, and a kind of Revolving chair tray, bag Include to connect the base 1 of gas bar, in order to connect the bracket 2 of seat support and in order to connect the seesaw 38 of the chair back, bracket 2 passes through level The rotating shaft 3 arranged is connected with base 1, and seesaw 38 front end and base 1 both sides are hinged by the 5th bearing pin 23, and seesaw 38 is gone back and bracket 2 rear ends are connected and bracket 2 can be driven when seesaw 38 rotates to rotate；Specifically, seesaw 38 is connected with bracket 2 rear end and refers to: torr Being welded with transverse slat 39 on bottom surface, frame 2 rear end, transverse slat 39 two ends are bent into one respectively with the otic placode 40 of axis hole 13, bracket 2 rear end Being horizontally set with the 4th bearing pin 22, the 4th described bearing pin 22 is a whole root length axle, and the 4th bearing pin 22 is located in the axle of two otic placodes 40 In hole 13, having mounting hole 41 in the corresponding position of seesaw 38, the two ends of the 4th bearing pin 22 are plugged on the waist of seesaw 38 simultaneously In shape hole 41, the 4th bearing pin 22 is played certain effect of dodging by mounting hole 41, but seesaw 38 can be made again can to drive torr simultaneously Frame 2 rotates.

This pallet also includes a swing span 4 and is horizontally disposed with and circumferentially fixed adjusting screw rod 5, one end of adjusting screw rod 5 In inserted base 1, the other end of adjusting screw rod 5 is exposed to outside base 1.The part that adjusting screw rod 5 is exposed to outside base 1 is arranged with Spring 26, and adjusting screw rod 5 is exposed to threaded engagement on the thread segment 27 outside base 1 and regulates spring 26 initial compression journey The nut 28 of degree；Screw rod 5 of adjusting is not necessarily referring to whole section of screw rod 5 and is the most all threaded, can be only with nut 28 parts coordinated are provided with screw thread.

Swing span 4 lies low in being arranged on base 1 and the middle part of swing span 4 is hinged with base 1, one end of swing span 4 and tune This end of joint screw rod 5 inserted base 1 is hinged, and seesaw 38 is with a bogie 6 extending in base 1；Specifically, bogie 6 for being obliquely installed, and seesaw 38 front rake is provided with a substrate 42, and bogie 6 upper end is welded and fixed with substrate 42, bogie 6 Lower end extends in base 1；When seesaw 38 rotates, the driven moving frame of the other end of swing span 46 promotes so that swing span 4 occurs to turn Dynamic, and then drive adjusting screw rod 5 to move the restoring force promoting spring 26 to deform to be formed seesaw 38.The center that swing span 4 rotates Axle is perpendicular to horizontal plane, and the rotation direction of swing span 4 is horizontal direction, owing to this end in adjusting screw rod 5 inserted base 1 is put Moving frame 4 limits, so circumference can not rotate.

Specifically, as shown in Fig. 6, Fig. 8, described base 1 includes base plate 7 and is vertically installed in the side of base plate 7 both sides Plate 8a, 8b, side plate 8a is provided with the perforation 9 penetrated for adjusting screw rod 5 wherein.Specifically, as shown in figure 14, bogie 6 include a pedestal 34 and the driving plate 35 downwardly extended along pedestal 34 both sides.

As shown in Figure 11,12, being respectively arranged at the two ends with a spring support 29 at spring 26, the two ends of spring 26 are respectively by neighbour The spring support 29 connect offsets with the side plate 8a of nut 28, base.Revolving chair tray of the present utility model also includes a regulation handle 30, this regulation handle 30 connects has a sleeve 31, described sleeve 31 to be set in outside spring 26, and nut 28 is fixedly installed on sleeve At the bottom of 31.Further saying, described sleeve 31 has an extension 32, and described regulation handle 30 and extension 32 are with circumference Fix, the mode of moving axially connects together；Specifically, extension 32 sidewall is in axial direction provided with chute (not scheme Show), the hollow wall of regulation handle 30 is correspondingly provided with slide block (not shown), slide block is stuck in chute.

As shown in Figure 8, being fixed with support 10 in base 1, swing span 4 and support 10 are hinged by the first bearing pin 11； Specifically, described support 10 includes a horizontally disposed gripper shoe 12, the side plate 8a of gripper shoe 12 two ends and base 1, 8b is fixedly linked, and (does not schemes at gripper shoe 12 axis hole coordinated with the first bearing pin 11 that offers corresponding with on the base plate 7 of base 1 Show), swing span 4 is arranged between the base plate 7 of gripper shoe 12 and base 1.This kind of version can at utmost reduce zero Part, optimizes chassis interior structure.

Alternatively implementation, described support 10 can also include the gripper shoe of a pair spaced and parallel setting 12, gripper shoe 12 is perpendicular to side plate 8a, and gripper shoe 12 is correspondingly provided with the axis hole coordinated with the first bearing pin 11, and swing span 4 is arranged Between two gripper shoes 12 and by the first bearing pin 11 hinged with two gripper shoes 12.

As shown in Figure 8, the gas bar jack 37 for gas bar of planting is in the centre position of base 1 width, this enforcement In example, with base 1 middle as boundary, the hinged place of swing span 4 and support 10 and spring 26 are in the both sides of base 1 middle, Spring 26 is in pan frontward end or rear end, naturally it is also possible to choice arrangement is in the same side of base 1 middle as required.Seesaw 38 make bogie 6 promote swing span 4 to rotate and then compression spring when rotating backward.

As shown in Fig. 3,4,6,10,11,12, described swing span 4 is overall L-shaped, and described swing span 4 includes that two are put down The symmetrically arranged L shaped plate 14 of row, is fixedly linked by least one connecting plate 15 between two L shaped plates 14, in the middle part of L shaped plate 14 with Fagging 12 is hinged, and an arm of L shaped plate 14 is hinged with adjusting screw rod 5, and another arm of L shaped plate 14 matches with bogie 6.Concrete Saying, being provided with the second bearing pin 16 between another arm of two L shaped plates 14, on the second bearing pin 16, turning set is provided with force block 17, institute The force block 17 stated has the stress surface 18 contacted all the time with bogie 6 corresponding site, and described stress surface 18 is plane.And Match with force block 17, be equipped with the 3rd bearing pin 19 for promoting force block 17, the 3rd bearing pin 19 in bogie 6 lower end The driving plate 35 of two ends, left and right and bogie 6 be rotationally connected, for reducing friction further, the 3rd bearing pin 19 rotates sheathed Axle sleeve 20, axle sleeve 20 is had to contact with stress surface 18.

After this utility model pallet is arranged on swivel chair, nut 28 synchronous axial system can be driven when rotating regulation handle, by It is circumferentially fixed in adjusting screw rod 5, and adjusting screw rod 5 is due to the restriction of swing span 4 and bracket, the gravity of seat support, makes regulation Screw rod 5 original state will not produce movement, and at this moment nut 28 moves horizontally along adjusting screw rod 5 axis direction, will regulate spring Initial compression degree, then realize regulation the spring purpose to chair reclining power.When people is sitting on swivel chair and leans on backward, bracket 2 rotations make bogie 6 promote swing span 4 to rotate, and then pull adjusting screw rod 5 to move towards the direction of compression spring 26, make bullet Spring 26 produces elastic force to make seesaw 38 and bracket 2 reset.

During operation, user is without bending, and without squatting down on the ground, only hands need to stretch to chair side touches regulation hands Handle rotates, easy to operate, time saving and energy saving；The most important thing is, spring is changed into being transversely mounted by vertical mounting means, makes Obtain seat support and covered in most of position of spring and handle, make chair appearance entirety more succinct, improve product specification.

Further say, as shown in Figure 6, be in the center of base 1 for the gas bar jack 37 of gas bar planted, and L The swing span 4 of shape is then arranged around gas bar jack 37, in the present embodiment, at base 1 center that is gas bar jack 37 to be Boundary, swing span 4 and that is first bearing pin 11 present position, hinged place of base 1 and spring 26 are in the left and right of gas bar jack 37 respectively Both sides, spring 26 is in pan frontward end or rear end, before and after adjusting screw rod 5 is then in gas bar jack 37 respectively with bogie 6 Both sides, such structure designs so that under not affecting driving version of the present utility model, can make full use of existing sky Between, make structure compacter, reduce volume, make pallet more miniaturization.

Embodiment 2: the present embodiment is identical with the principle of embodiment 1, the difference is that only: as shown in Figure 13～17, for Reducing frictional force further, make cooperation more smoothly, the other end at swing span 4 is provided with the second bearing pin 16, at the second bearing pin 16 Upper turning set is provided with force block 17；The 3rd bearing pin 19 for promoting swing span 4 it is provided with, at the 3rd bearing pin in bogie 6 lower end On 19, turning set is provided with a pushing block 43 matched with force block 17, and the 3rd bearing pin 19 is vertically arranged with both the second bearing pins 16； As shown in figure 15, being provided with ball 44 between pushing block 43 and force block 17, begins with pushing block 43, force block 17 respectively in ball 44 both sides Keep contact eventually, and ball 44 makes to keep between pushing block 43 and force block 17 interval 47.Ball 44 both sides are to refer to and pushing block 43, the sphere that force block 17 contacts.

Specifically, described force block 17 has stress surface 18, and described pushing block 43 has force surface 45, stress surface 18 It is plane with force surface 45, stress surface 18 with force surface 45 are respectively equipped with arcuate groove 46, the part arc of ball 44 both sides Face is stuck in two arcuate grooves 46, and the depth capacity of two arcuate grooves 46 is respectively less than the radius of ball 44；Described circle Ball 44 is the metal ball of smooth outer surface, the most also can be at ball 44 surface smear lubricating oil.

Embodiment 3: the present embodiment is identical with the principle of embodiment 1, the difference is that only: as shown in figure 18, for making to turn Moving and the most freely and as far as possible reduce parts size, take into account again the requirement of fastness simultaneously, swing span 4 is overall triangular in shape, Described swing span 4 includes the set square 21 that two Parallel Symmetrics are arranged, plane residing for described set square 21 and the end of base 1 Plane residing for plate 7 is parallel, is fixedly linked by least one connecting plate (not shown) between two set squares 21, set square 21 Two angles are hinged with base 1 and adjusting screw rod 5 respectively, match with bogie 6 in another angle of set square 21.

Specifically, it is provided with the second bearing pin 16, second between two jiaos of two set squares 21 coordinated at bogie 6 On bearing pin 16, turning set is provided with force block 17, and described force block 17 has and being subject to that bogie 6 corresponding site contacts all the time Power face 18；Corresponding, the 3rd bearing pin 19 for promoting force block 17 it is equipped with in bogie 6 lower end, the 3rd bearing pin 19 Two ends, left and right are rotationally connected with bogie 6, and for reducing friction further, on the 3rd bearing pin 19, turning set is provided with axle sleeve 20, axle Set 20 contacts with stress surface 18.

Further saying, for reducing friction further, making cooperation more smooth and easy, the second bearing pin 16 also can be adopted with the 3rd bearing pin 19 The mode coordinated with the ball in embodiment 2.

Claims (6)

1. for the pushing mechanism of Revolving chair tray, it is characterized in that: include rotating the force block arranged and rotating the pushing block arranged, push away Block matches with force block and both rotating shafts are perpendicular, is arranged with ball between pushing block and force block, and ball both sides are respectively Remain with pushing block, force block and contact, and ball makes to keep between pushing block and force block interval.

Pushing mechanism for Revolving chair tray the most according to claim 1, is characterized in that: described force block has stress Face, described pushing block has force surface, is respectively equipped with arcuate groove on stress surface with force surface, and the part cambered surface of ball both sides is divided It is not stuck in two arcuate grooves, and the depth capacity of two arcuate grooves is respectively less than the radius of ball.

Pushing mechanism for Revolving chair tray the most according to claim 1, is characterized in that: described ball is outer surface light Sliding metal ball.

4., for the driving means of Revolving chair tray, it is characterized in that: include bogie, swing span and push away as claimed in claim 1 Motivation structure, bogie is connected with bracket or seesaw, and in the middle part of swing span, the base with pallet is hinged, be provided with in bogie lower end for Promoting the 3rd bearing pin of swing span, pushing block turning set is located on the 3rd bearing pin；This end coordinated with bogie at swing span sets Having the second bearing pin, force block turning set to be located on the second bearing pin, the 3rd bearing pin and the second bearing pin are vertically arranged.

Driving means for Revolving chair tray the most according to claim 4, it is characterised in that: described force block has and is subject to Power face, described pushing block has force surface, is respectively equipped with arcuate groove, the part cambered surface of ball both sides on stress surface with force surface It is stuck in two arcuate grooves, and the depth capacity of two arcuate grooves is respectively less than the radius of ball.

Driving means for Revolving chair tray the most according to claim 4, it is characterised in that: described ball is outer surface Smooth metal ball.