CN205041036U - Office chair tray - Google Patents

Abstract

The utility model discloses an office chair tray, include the base that is used for connecting the gas pole, the bracket that is used for connecting the seat support, the pivot that the bracket passes through the level setting links to each other with the base, and the bracket has one and extends to the bogie in the base, is equipped with the elastic component with bogie matched with in the base, and the bogie impelled the elastic component to be out of shape the restoring force that restores to the throne with the formation bracket when bracket rotated, the utility model discloses an office chair tray is horizontal in the end of tray seat with the elastic component, and the bogie of taking certainly through the bracket directly contacts so that provide the restoring force for the bracket resets when the bracket rotates with the elastic component, and the ten minutes is ingenious, the utility model discloses a tray so the shape is more regular, can effectively reduce the space waste because the elastic component is transversely installed in the end of tray seat when the vanning transportation, increase the vanning volume, reduces the cost of transportation.

Description

A kind of office chair pallet

Technical field

The utility model relates to swivel chair, office chair technical field, particularly a kind of office chair pallet.

Background technology

Office chair pallet, also claims chair bottom, is the vitals be contained in below swivel chair seat cushion, the lifting of seat cushion, and the elevation angle of backrest regulates and all relies on pallet.

Such as, Chinese patent (notification number: CN2922618) discloses one: " lifting and reclining Chair underpan ", and this chair tray is by upper dish, mid-game and knob composition, knob is fixed on by CARRIAGE BOLTS and coils, and dust cover, washer and spring fitting are in mid-game, during chair reclining, spring plays reset response to chair reclining, as can be seen from this patent, knob, spring and CARRIAGE BOLTS are vertical or be almost vertically arranged on pallet substantially, i.e. knob, formed by the axis of spring and CARRIAGE BOLTS and mid-game or seat support, angle is 70 ~ 90 degree, during to the elastic force of regulating spring with the reset response power of regulating spring to chair reclining, need to squat down or bend by turning knob with the upper-lower position of adjusting knob on CARRIAGE BOLTS, thus the compression degree of regulating spring is with the reset response power of regulating spring to chair reclining, inconvenient operation, comparatively require great effort, and especially bend to regulate posture unbecoming for women, adjusting knob can not be removed because above-mentioned defect directly results in user in a lot of situation, therefore directly results in the waste of above-mentioned functions.

Notification number is: the Chinese patent of " CN102090805 " improves, provide the Chair underframe that a kind of reclining power is adjustable, it comprises mid-game and deep bid, the rear portion of deep bid can around the shaft relative to mid-game to lower swing, the lower front of mid-game is provided with knob, and knob has cavity, is provided with the installing plate fixing with knob in the cavity of described knob, the position that knob corresponds to below installing plate is provided with worm gear, and described worm gear can around own axes relative to knob; Its utility model main points are: correspond to worm gear side in knob and be provided with the worm screw engaged with worm gear, handle one end enters to be connected with described worm-drive in knob from knob is overhanging, adjusting bolt matches through screw thread after the installing plate in deep bid, mid-game and knob and described worm gear from top to bottom successively, described adjusting bolt is coaxial with worm gear, and the position that adjusting bolt corresponds to more than below mid-game and installing plate is arranged with helical spring.

By such improvement, without the need to bending, only need to stretch out one's hand turning handle namely to move up or down by worm and gear adjusting bolt, thus the compression degree of adjustable screw spring.Equally, notification number is: " CN201602417 ", utility model name are called: the utility model patent of " worm and gear adjusting swivel chair tray " also has similar improvement, and adjusting handle is in seat side edges, and user is namely adjustable without the need to squatting down or bending.

But above-mentioned patent has a common shortcoming to be: knob, spring and adjusting bolt are vertical or be almost vertically arranged on pallet substantially, that is angle formed by the axis of knob, spring and adjusting bolt and pallet or seat support is 70 ~ 90 degree, so from chair front or two sides, can very clearly see the knob exposed below pallet, very unsightly, also reduce the class of product to a certain extent, the requirement succinct to chair appearance that people improve day by day can not be adapted to again; Again furtherly, such version out-of-shape, be unfavorable for improving vanning amount, protruding knob causes packing case directly to thicken, and cabinet interior has many places to be all empty in fact, wastes cabinet interior space, adds cost of transportation.

Utility model content

The utility model to overcome in above-mentioned prior art existing deficiency, provide a kind of not only can make office chair overall succinctly attractive in appearance, but also facilitate regulating spring compression degree and the office chair pallet of vanning amount can be improved.

The technical solution of the utility model is achieved in that

A kind of office chair pallet, comprise connecting the base of gas bar, in order to connect the bracket of seat support, bracket is connected with base by horizontally disposed rotating shaft, bracket extends to the bogie in base with one, in base, be provided with the elastic component matched with bogie, during carriage turns, bogie impels the restoring force that resilient member deforms resets to form bracket.

As preferably, elastic component lies low and is arranged in base, and the two ends of elastic component offset with base inner wall, bogie respectively, and during carriage turns, bogie lower end extruding elastic component makes it to deform.Elastic component directly offsets with bogie, and make the direct restoring force being bracket and providing it to reset, restoring force is without any loss, efficient simply again.

Conveniently bogie contacts with elastic component and coordinates, and as preferably, this end that elastic component coordinates with bogie is connected with force block, and bogie and force block offset.

As preferably, be provided with the bearing pin a for promoting force block in bogie lower end, the two ends, left and right of bearing pin a and bogie are rotationally connected.The setting of bearing pin a with contact form is become linear contact lay, decrease frictional force during contact.

As preferably, on bearing pin a, turning set is provided with axle sleeve.Axle sleeve is rotary, and therefore when especially matching with force block with bogie, the force of rolling friction that axle sleeve produces, the force of sliding friction produced than linear contact lay is less, and bearing pin a and coordinating between bogie can be made more smooth and easy.

As preferably, elastic component lies low and is arranged in base, and the two ends of elastic component are connected with base inner wall, bogie respectively, and during carriage turns, bogie lower end draw springs makes it to deform.

As preferably, this pallet also includes the adjusting device in order to adjustable elastic part initial deformation degree.

As preferably, described adjusting device comprises horizontally disposed adjusting screw(rod), in one end inserted base of adjusting screw(rod), and adjusting screw(rod) is connected with whorl of base, this end in adjusting screw(rod) inserted base is connected with baffle plate, elastic component is arranged between baffle plate with bogie lower end and one end of elastic component and offsets with baffle plate or be connected, and rotation adjusting screw(rod) makes the spacing between change baffle plate and bogie lower end, and then the initial deformation degree of adjustable elastic part.

As preferably, described elastic component is spring.

Have employed the design starting point of the present utility model of technique scheme, theory and beneficial effect is:

Office chair pallet of the present utility model is by horizontal for elastic component in basetray, and the bogie carried by bracket directly contacts to provide restoring force when carriage turns for bracket resets with elastic component, very ingenious; The initial elastic force of elastic component can be regulated by an adjusting screw(rod), adjusting screw(rod) can connect regulating handle, the axis of such elastic component and the axis of regulating handle are on a line substantially, not only squatting down without the need to bending, making adjustment more convenient, and it is arranged on after on seat support, relatively roomy seat support can cover in spring and regulating handle major part position, from appearance, one of regulating handle is only had to expose outside, the overall simplicity generosity of chair appearance, not only meet the convenient function regulated, also improve product specification.

Meanwhile, pallet of the present utility model is laterally be arranged in basetray due to elastic component, so shape is more regular, effectively can reduces space waste, increasing vanning amount, reducing cost of transportation when casing transport.

Again furtherly, bracket is carried bogie and is directly contacted with elastic component by bogie, the maximized structure simplifying pallet of such version, also makes it possible to the whole height reducing base further, makes pallet further accomplish lightweight, miniaturization; From result of use, pallet entirety is almost hidden in below office chair seat support, improves aesthetic measure and the class of office chair.

Accompanying drawing explanation

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

Fig. 2 is the internal structure schematic diagram of pallet in embodiment 1;

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

Fig. 4 is the plan structure schematic diagram of pallet in embodiment 1;

Fig. 5 is the planar structure schematic diagram representing in embodiment 1 that bogie matches with swing component;

Fig. 6 is the swing component schematic diagram that coordinates hinged with adjusting screw(rod) in embodiment 1;

Fig. 7 is the fractionation structural representation of bracket, swing component and base in embodiment 1;

Fig. 8 is the fractionation structural representation of another angle of bracket, swing component and base in embodiment 1;

Fig. 9 is the explosive view of pallet in embodiment 1;

Chassis interior stereoscopic-state schematic diagram when Figure 10 is carriage turns 9 degree in embodiment 1;

The flat state schematic diagram of base when Figure 11 is carriage turns 9 degree in embodiment 1;

Chassis interior stereoscopic-state schematic diagram when Figure 12 is carriage turns 19 degree in embodiment 1;

The flat state schematic diagram of base when Figure 13 is carriage turns 19 degree in embodiment 1;

Figure 14 is the perspective view of pallet in embodiment 2;

Figure 15 is the planar structure schematic diagram of pallet in embodiment 2;

Chassis interior stereoscopic-state schematic diagram when Figure 16 is carriage turns 9 degree in embodiment 2;

The flat state schematic diagram of base when Figure 17 is carriage turns 9 degree in embodiment 2;

Chassis interior stereoscopic-state schematic diagram when Figure 18 is carriage turns 19 degree in embodiment 2;

The flat state schematic diagram of base when Figure 19 is carriage turns 19 degree in embodiment 2;

Figure 20 is the internal structure schematic diagram of pallet in embodiment 3;

Figure 21 is the internal structure schematic diagram of another angle of pallet in embodiment 3;

Figure 22 is the inner plane structural representation of pallet in embodiment 3;

Figure 23 is the explosive view of pallet in embodiment 3;

Figure 24 is the swing component schematic diagram that coordinates hinged with adjusting screw(rod) in embodiment 3;

Chassis interior stereoscopic-state schematic diagram when Figure 25 is carriage turns 9 degree in embodiment 3;

The flat state schematic diagram of base when Figure 26 is carriage turns 9 degree in embodiment 3;

Chassis interior stereoscopic-state schematic diagram when Figure 27 is carriage turns 19 degree in embodiment 3;

The flat state schematic diagram of base when Figure 28 is carriage turns 19 degree in embodiment 3;

Figure 29 is the inner plane structural representation of pallet in embodiment 4;

Figure 30 is the inside perspective view of pallet in embodiment 4;

Figure 31 represents the structural representation that bogie matches with elastic component in embodiment 5;

Figure 32 is the planar structure schematic diagram that in embodiment 5, bogie matches with elastic component;

Figure 33 is the planar structure schematic diagram in embodiment 6 in pallet.

Detailed description of the invention

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

First the reference azimuth of the utility model critical piece is defined, the utility model by pallet and office chair when normal mounting uses, the front of office chair is front end, and the position that the rear of office chair comprises backrest place is rear end, the front end of pallet is the region away from backrest, and the rear end of pallet is the region near backrest.

Embodiment 1: present embodiments provide a kind of office chair pallet, as shown in figs. 1-13, a kind of office chair pallet, comprise connecting the base 1 of gas bar, in order to connect the bracket 2 of seat support, bracket 2 is connected with base 1 by horizontally disposed rotating shaft 3, this pallet also comprises a swing component 4 and is horizontally disposed with and circumferential fixing adjusting screw(rod) 5, and in one end inserted base 1 of adjusting screw(rod) 5, the other end of adjusting screw(rod) 5 is exposed to outside base 1.

Adjusting screw(rod) 5 part be exposed to outside base 1 is arranged with spring 26, and on adjusting screw(rod) 5 is exposed to outside base 1 thread segment 27, threaded engagement has the nut 28 in order to regulating spring 26 initial compression degree; The compression degree of camber of spring degree mainly thrum spring, namely spring-compressed produces elastic force, and the different corresponding elastic force of compression degree of spring is also different; Adjusting screw(rod) 5 might not refer to that whole section of screw rod 5 is from first to last all processed with screw thread, can be only to be provided with screw thread in the part coordinated with nut 28.

Swing component 4 lie low be arranged in base 1 and the middle part of swing component 4 and base 1 hinged, one end of swing component 4 and this end of adjusting screw(rod) 5 inserted base 1 hinged, bracket 2 bottom surface extends to the bogie 6 in base 1 with one, when bracket 2 rotates, the other end of swing component 4 promotes or pulls swing component 4 is rotated by bogie 6, and then drives adjusting screw(rod) 5 to move the restoring force impelling spring 26 to be out of shape to be formed bracket 2.The central axis that swing component 4 rotates is in horizontal plane, and the rotation direction of swing component 4 is horizontal direction, because this end in adjusting screw(rod) 5 inserted base 1 is limited by swing component 4, so circumference can not be rotated.

Specifically, described base 1 comprises base plate 7 and is vertically installed in side plate 8a, 8b of base plate 7 both sides, side plate 8a is provided with the perforation 9 penetrated for adjusting screw(rod) 5 wherein, and bogie 6 upper end and bracket 2 bottom surface are welded and fixed, and bogie 6 lower end extends in base 1.Specifically, bogie 6 comprises a substrate 34 and along substrate 34 both sides to the drive plate 35 of downward-extension, is raising solidness and intensity, and two drive plates 35 are connected by least one stiffener 36.

As shown in figs. 7-9, be respectively provided with a spring support 29 at the two ends of spring 26, the two ends of spring 26 offset with the side plate 8a of nut 28, base respectively by adjacent spring support 29.Revolving chair tray of the present utility model also comprises a regulating handle 30, and this regulating handle 30 is connected with a sleeve 31, and described sleeve 31 is set in outside spring 26, and nut 28 is fixedly installed at the bottom of 31, sleeve.Again furtherly, described sleeve 31 has an extension 32, and described regulating handle 30 is fixed with circumference with extension 32, the mode of moving axially connects together; Specifically, extension 32 sidewall is in axial direction provided with chute 33, on the hollow wall of regulating handle 30, correspondence is provided with slide block (not shown), and slide block is stuck in chute 33.

As shown in Fig. 4, Fig. 7,8, be provided with support 10 at base 1 internal fixtion, swing component 4 is hinged by the first bearing pin 11 with support 10; Specifically, described support 10 comprises a horizontally disposed gripper shoe 12, the side plate 8a of gripper shoe 12 one end and base 1 is fixedly linked, correspondingly on the base plate 7 of gripper shoe 12 with base 1 offer the axis hole 13 coordinated with the first bearing pin 11, swing component 4 is arranged between the base plate 7 of gripper shoe 12 and base 1.This kind of version at utmost can reduce parts, optimizes chassis interior structure.

Alternatively implementation, described support 10 can also comprise the gripper shoe 12 of a pair spaced and parallel setting, gripper shoe 12 is perpendicular to side plate 8a, correspondingly in gripper shoe 12 be provided with the axis hole 13 coordinated with the first bearing pin 11, swing component 4 to be arranged between two gripper shoes 12 and by the first bearing pin 11 and two gripper shoes 12 hinged.

As shown in Figure 5, gas bar jack 37 for gas bar of planting is in the centre position of base 1 width, in the present embodiment, with base 1 middle for boundary, the hinged place of swing component 4 and support 10 and spring 26 are in the same side of base 1 middle, spring 26 is in pan frontward end or rear end, can certainly as required choice arrangement in the both sides of base 1 middle.Bracket 2 makes bogie 6 promote swing component 4 to rotate and then Compress Spring when rotating backward.

As shown in Fig. 4,6,9, described swing component 4 is overall L-shaped, described swing component 4 comprises the L shaped plate 14 that two Parallel Symmetrics are arranged, be fixedly linked by least one connecting plate 15 between two L shaped plates 14, hinged with gripper shoe 12 in the middle part of L shaped plate 14, one arm and the adjusting screw(rod) 5 of L shaped plate 14 are hinged, and another arm of L shaped plate 14 matches with bogie 6.Specifically, be 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, and described force block 17 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, the 3rd bearing pin 19 for promoting force block 17 is equipped with in bogie 6 lower end, the two ends, left and right of the 3rd bearing pin 19 and the drive plate 35 of bogie 6 are rotationally connected, for reducing friction further, on the 3rd bearing pin 19, turning set is provided with axle sleeve 20, and axle sleeve 20 contacts with stress surface 18.

The utility model pallet is arranged on after on swivel chair, nut 28 synchronous axial system can be driven when rotating regulating handle, because adjusting screw(rod) 5 is that circumference is fixing, and adjusting screw(rod) 5 is due to the gravity of the restriction of swing component 4 and bracket, seat support, adjusting screw(rod) 5 original state is made to produce movement, at this moment nut 28 moves horizontally along adjusting screw(rod) 5 axis direction, will the initial compression degree of regulating spring, then realizes the object of regulating spring to chair reclining power.When people to be sitting on swivel chair backward by time, bracket 2 rotates and makes bogie 6 promote swing component 4 to rotate, and then pulls adjusting screw(rod) 5 to move towards the direction of Compress Spring 26, makes spring 26 produce elastic force to make bracket 2 reset.

During operation, hand, without the need to bending, also without the need to squatting down on the ground, only need be stretched to chair side and touching regulating handle and rotate by user, easy to operate, time saving and energy saving; The most important thing is, spring changes horizontal installation into by vertical mounting means, most of position of seat support is covered in spring and handle, makes chair appearance entirety more succinct, improves product specification.

Embodiment 2: the present embodiment is identical with the principle of embodiment 1, difference is only: as shown in Figure 14 ~ 19, for making rotation more freely and reducing parts size as far as possible, take into account again the requirement of fastness simultaneously, swing component 4 is overall triangular in shape, described swing component 4 comprises the set square 21 that two Parallel Symmetrics are arranged, plane residing for the base plate 7 of plane residing for described set square 21 and base 1 is parallel, be fixedly linked by least one connecting plate 15 between two set squares 21, two angles of set square 21 respectively with base 1 and adjusting screw(rod) 5 hinged, match with bogie 6 in another angle of set square 21.

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

Again furtherly, as different from Example 1, as shown in Figure 14,15, swing component 4 oppositely installs, namely spring 26 to be on the left of base 1 and to be in base 1 front end, swing component 4 is then in the right side of base 1 with the hinged place of support 10, makes bogie 6 promote swing component 4 and rotate and then Compress Spring when bracket 2 rotates backward.

Embodiment 3: the present embodiment is identical with above-described embodiment principle, and difference is, bogie is that the mode by pulling drives swing component to rotate.

Specifically, as shown in Figure 20 ~ 28, this end that swing component 4 coordinates with bogie 6 is equipped with the 4th bearing pin 22, setting due to bracket 2 rotation direction is that bogie 6 is moved towards the direction away from swing component 4, bracket 23 is provided with in base 1, bracket 23 is connected to form by the parallel planker 24 in two block gaps and at least one connecting plate 15 of connecting two plankers 24, one end and bogie 6 lower end of bracket 23 are hinged, the other end of bracket 23 is equipped with the 5th bearing pin 25, together with 4th bearing pin 22 and both hook joints arranged in a crossed manner with the 5th bearing pin 25, bracket 2 makes bogie 6 pull bracket 23 when rotating, and then pull swing component 4 to make it rotate.

Again furtherly, on the 5th bearing pin 25, turning set is provided with axle sleeve 20, and on the 4th bearing pin 22, turning set is provided with force block 17, and described force block 17 has the stress surface 18 contacted all the time with axle sleeve 20, and described axle sleeve 20 contacts with stress surface 18.

Embodiment 4: the present embodiment is identical with above-described embodiment 1 principle, described swing component 4 is overall L-shaped, difference is, as Figure 29, shown in 30, gas bar jack 37 for gas bar of planting is in the center of base 1, the swing component 4 of L shape is then arranged around gas bar jack 37, in the present embodiment, with base 1 center that is gas bar jack 37 place for boundary, support 10 and spring (not shown) are in the left and right sides of gas bar jack 37 respectively, spring is in pan frontward end or rear end, adjusting screw(rod) 5 is then in the both sides, front and back of gas bar jack 37 respectively with bogie 6, such structural design, make do not affecting under drives structure form of the present utility model, existing space can be made full use of, make structure compacter, reduce volume, make pallet more miniaturized.

Embodiment 5: present embodiments provide the simplest office chair pallet of a kind of structure, as shown in Figure 31,32, comprise connecting the base 1 of gas bar, in order to connect the bracket 2 of seat support, bracket 2 is connected with base 1 by horizontally disposed rotating shaft 3, bracket 2 extends to the bogie 6 in base 1 with one, bogie 6 upper end and bracket 2 bottom surface are welded and fixed, the elastic component matched with bogie 6 is provided with in base 1, described elastic component is spring 26, and when bracket 2 rotates, bogie 6 impels spring 26 to be out of shape to be formed the restoring force of bracket 2 reset.

Specifically, spring 26 lies low and is arranged in base 1, and the two ends of spring 26 offset with base 1 inwall, bogie 6 respectively, and when bracket 2 rotates, bogie 6 lower end extrusion spring 26 makes it to deform.

Better coordinate with bogie to make spring 26, this end that spring 26 coordinates with bogie 6 is connected with force block 17, the bearing pin a50 for promoting force block 17 is provided with in bogie 6 lower end, two ends, left and right and the bogie 6 of bearing pin a50 are rotationally connected, for reducing frictional force further, on bearing pin a50, turning set is provided with axle sleeve 20, and axle sleeve 20 offsets with force block 17 and contacts.

Conveniently the initial deformation degree of spring 26 is regulated, this pallet also includes the adjusting device in order to adjustable elastic part initial deformation degree, described adjusting device comprises horizontally disposed adjusting screw(rod) 5, in one end inserted base 1 of adjusting screw(rod) 5, and adjusting screw(rod) 5 is threaded with base 1, this end in adjusting screw(rod) 5 inserted base is connected with baffle plate 51, spring 26 is arranged between baffle plate 51 with bogie 6 lower end and one end of spring 26 and offsets with baffle plate 51 or be connected, rotation adjusting screw(rod) 5 makes the spacing between change baffle plate 51 and bogie 6 lower end, and then the initial deformation degree of regulating spring 26.

Embodiment 6: the present embodiment principle is substantially the same manner as Example 1 is the swing component 4 being provided with L shape in base 1, and swing component 4 is identical with embodiment 1 with the fit form of bogie 6, difference is, as shown in figure 33, elastic component is arranged in base 1, and elastic component is spring 26.Match with spring 26 in one end of swing component 4, during carriage turns, the other end of swing component 4 promotes swing component 4 is rotated by bogie 6, and then impels spring 26 to be out of shape to be formed the restoring force of bracket.

Conveniently the initial deformation degree of spring 26 is regulated, this pallet also includes the adjusting device in order to adjustable elastic part initial deformation degree, described adjusting device comprises horizontally disposed adjusting screw(rod) 5, in one end inserted base 1 of adjusting screw(rod) 5, and adjusting screw(rod) 5 is threaded with base 1, this end in adjusting screw(rod) 5 inserted base is connected with baffle plate 51, spring 26 is arranged between baffle plate 51 with bogie 6 lower end and one end of spring 26 and offsets with baffle plate 51 or be connected, rotation adjusting screw(rod) 5 makes the spacing between change baffle plate 51 and bogie 6 lower end, and then the initial deformation degree of regulating spring 26.

Claims (9)

1. an office chair pallet, comprise connecting the base of gas bar, in order to connect the bracket of seat support, bracket is connected with base by horizontally disposed rotating shaft, it is characterized in that: bracket extends to the bogie in base with one, in base, be provided with the elastic component matched with bogie, during carriage turns, bogie impels the restoring force that resilient member deforms resets to form bracket.

2. a kind of office chair pallet according to claim 1, is characterized in that: elastic component lies low and is arranged in base, the two ends of elastic component offset with base inner wall, bogie respectively, and during carriage turns, bogie lower end extruding elastic component makes it to deform.

3. a kind of office chair pallet according to claim 1, is characterized in that: this end that elastic component coordinates with bogie is connected with force block, and bogie and force block offset.

4. a kind of office chair pallet according to claim 3, is characterized in that: be provided with the bearing pin a for promoting force block in bogie lower end, the two ends, left and right of bearing pin a and bogie are rotationally connected.

5. a kind of office chair pallet according to claim 4, is characterized in that: on bearing pin a, turning set is provided with axle sleeve.

6. a kind of office chair pallet according to claim 1, it is characterized in that: elastic component lies low and is arranged in base, the two ends of elastic component are connected with base inner wall, bogie respectively, and during carriage turns, bogie lower end draw springs makes it to deform.

7. a kind of office chair pallet according to claim 1, is characterized in that: this pallet also includes the adjusting device in order to adjustable elastic part initial deformation degree.

8. a kind of office chair pallet according to claim 7, it is characterized in that: described adjusting device comprises horizontally disposed adjusting screw(rod), in one end inserted base of adjusting screw(rod), and adjusting screw(rod) is connected with whorl of base, this end in adjusting screw(rod) inserted base is connected with baffle plate, elastic component is arranged between baffle plate with bogie lower end and one end of elastic component and offsets with baffle plate or be connected, rotation adjusting screw(rod) makes the spacing between change baffle plate and bogie lower end, and then the initial deformation degree of adjustable elastic part.

9. a kind of office chair pallet according to claim 1, is characterized in that: described elastic component is spring.