Background
Office chairs are important office furniture. Along with the demand of office crowd to office chair travelling comfort constantly increases, office chair is constantly developing to multi-functional direction gradually. At the present stage, the multifunctional office chair mainly needs to meet the following requirements besides meeting the requirements of people for sitting:
1. the seat backrest can be inclined, and the inclined angle can be adjusted and fixed so as to meet different lying requirements of passengers, such as half lying or full lying;
2. the seat cushion of the seat can be turned over by a certain angle, so that the front part of the seat cushion is upward and the rear part of the seat cushion is downward, and the knees of a passenger are raised to different degrees;
3. when the passenger has a rest, the legs can be supported by the leg supports, so that the comfort is improved.
In order to meet the above requirements, engineers in related fields have partial research results, and can meet corresponding requirements independently. However, due to lack of overall planning, on one hand, the structure adopted by the prior art is not simplified enough, and on the other hand, after the functions are combined by adopting the prior art, the office chair has a complex and bloated structure, and the structures corresponding to the functions are seriously interfered with each other, so that the office chair has the defects of heavy weight, insufficient aesthetic property and the like. Therefore, it is necessary to plan the implementation of each requirement as a whole again to integrate the functions. During the integration process, various structural members and linkage relations need to be planned and designed again.
Specifically, in the prior art, the rotation resistance of the backrest and the seat pan/cushion needs to be controlled during the rotation adjustment process, so as to improve the rotation stability. In actual use, the factors such as height and weight of each user are different, so that the users feel different in the rotating resistance, and therefore the requirements for the rotating resistance are different, but the existing design only can provide a fixed resistance.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a device capable of actively adjusting the rotation resistance during the turning process of the backrest and/or the seat cushion. The technical scheme is as follows:
the utility model provides a upset damping adjusting device which the key lies in: the supporting base is provided with a seat rotating seat, the seat rotating seat is hinged with the supporting base, and the seat rotating seat rotates on the supporting base around a hinged point of the seat rotating seat;
the support base is also provided with a pre-tightening adjusting assembly, and the pre-tightening adjusting assembly is connected with the elastic piece and is used for adjusting the pre-tightening force of the elastic piece;
the elastic piece is connected with the seat rotary seat to provide resistance when the seat rotary seat rotates.
Compared with the prior art, the beneficial effects of the utility model are that: through setting up pretension adjusting part, can carry out the pretension to the elastic component that provides the upset resistance to make the user independently adjust the upset resistance size according to self demand.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in fig. 1-7, a roll-over damping adjustment device comprises a support base 9 and an elastic member 1, wherein a seating swivel 7 is arranged on the support base 9, the seating swivel 7 is hinged with the support base 9, and the seating swivel 7 rotates on the support base 9 around the hinged point;
a pre-tightening adjusting component 2 is further arranged on the supporting base 9, and the pre-tightening adjusting component 2 is connected with the elastic piece 1 and is used for adjusting the pre-tightening force of the elastic piece 1;
the elastic piece 1 is hinged with the seat rotary seat 7, so that the elastic piece 1 can rotate in a self-adaptive mode and provide resistance to the rotation of the seat rotary seat 7.
The pre-tightening adjusting assembly 2 comprises an elastic piece restraining seat 21, the elastic piece restraining seat 21 is fixed on the supporting base 9, a strip-shaped restraining hole is formed in the elastic piece restraining seat 21, the length direction of the strip-shaped restraining hole is arranged along the deformation direction of the elastic piece 1, the elastic piece 1 moves along the strip-shaped restraining hole through a clamping head to deform, an elastic piece pushing mechanism is further arranged on the elastic piece restraining seat 21 and acts on the elastic piece 1 to cause the elastic piece 1 to deform along the direction of the strip-shaped restraining hole.
The elastic piece pushing mechanism comprises a pushing cam 22, the pushing cam 22 is installed on the elastic piece restraining seat 21 through a cam shaft, and the pushing cam 22 is arranged corresponding to the elastic piece 1 and is in contact with the elastic piece; the camshaft is fixedly sleeved with a driven gear 23, the supporting base 9 is provided with a driving gear 24, the driving gear 24 is arranged on the supporting base 9 through a gear shaft, a handle 25 is fixed on the gear shaft, and the driving gear 24 is meshed with the driven gear 23.
Elastic component 1 is the spring, the spring can be coil spring, also can be the air spring, the one end of spring with it is articulated to lean on swivel mount 7, the other end of spring is fixed with the screens head, and this screens head sliding assembly is in the bar restraint is downthehole, push up push cam 22 with the screens head supports and leans on.
Support and still be equipped with seatpad 8 on the base 9, this seatpad 8 the rear portion with it is articulated to support the base 9, the seat is leaned on swivel mount 7 and is connected with lifting connecting rod 6, lifting connecting rod 6 one end with the seat is leaned on swivel mount 7 articulated, lifting connecting rod 6 the other end with seatpad 8 is articulated.
Specifically, the method comprises the following steps: the seat-leaning rotary seat 7 comprises a linkage propulsion seat 71 and a linkage propulsion arm 72, the linkage propulsion seat 71 is hinged to the supporting base 9, one end of the linkage propulsion arm 72 is connected with the linkage propulsion seat 71, the other end of the linkage propulsion arm 72 extends forwards, and the front end of the linkage propulsion arm 72 is hinged to the lifting connecting rod 6.
To accommodate different regulatory requirements: a lifting constraint track is further arranged on the support base 9, and a hinge point of the lifting connecting rod 6 and the linkage propelling arm 72 is limited by the lifting constraint track and moves according to a set constraint track.
The specific constrained trajectory scheme may be: the track restraining device is characterized in that a track restraining vertical plate is arranged on the supporting base 9, a clamping groove is formed in the track restraining vertical plate, the lifting connecting rod 6 is hinged to the seat leaning rotary seat 7 through a track restraining shaft 5, and one end of the track restraining shaft 5 is inserted into the clamping groove and moves along the lifting restraining track.
According to the trend of the lifting constraint track:
when the lifting constraint track is a constraint arc, and the center of the constraint arc coincides with the hinge point of the linkage propulsion seat 71 and the support base 9, the linkage propulsion arm 72 and the linkage propulsion seat 71 may be hinged or fixed.
When the lifting constraint track is arbitrarily set and is not an arc, or the center of the arc is not coincident with the hinge point of the linkage propulsion seat 71 and the support base 9, the linkage propulsion arm 72 and the linkage propulsion seat 71 should be hinged.
The supporting base 9 comprises a shell bottom 91, the edges of the shell bottom 91 are respectively turned upwards to form shell flanges 92, the inner walls of the two shell flanges 92 which are right opposite to each other at the left side are respectively hinged with the seat turning seat 7, and the seat turning seat 7 is respectively connected with the lifting connecting rod 6; the seat support rotary bases 7 on the two shell flanges 92 which are right and left opposite are fixedly connected through lifting synchronous rods 73, two ends of each lifting synchronous rod 73 are respectively and fixedly connected with the corresponding linkage propulsion bases 71, and the elastic piece 1 is hinged with the linkage propulsion base 71 of any one seat support rotary base 7.
The seat-leaning swivel base 7 is also connected with a backrest component, and the lower part of the backrest component is fixedly connected with the seat-leaning swivel base 7. Specifically, the back subassembly includes back body and back connecting plate 4 the casing turn-ups 92 outside corresponds every the seat is leaned on swivel mount 7 and is equipped with respectively back connecting plate 4, back connecting plate 4 with seat is leaned on swivel mount 7's articulated shaft fixed connection, back connecting plate 4 to the rear of seatpad 8 is extended and is inwards turned over again and form the back fixed part, is equipped with back fixed orifices on this back fixed part, the back connecting plate 4 of the left and right sides all with same back body (not shown in the figure) is connected.
In order to adjust the adjusted backrest and/or seat cushion 8, a controllable gas spring s is further provided, one end of the controllable gas spring s is hinged to the supporting base 9, and the other end of the controllable gas spring s is hinged to the seat-leaning rotary seat 7. The controllable gas spring s is in the prior art, has a function that any position can be stopped, is provided with an unlocking cable, can be unlocked by arranging a handle or a handle to operate the unlocking cable, can automatically stretch in the unlocking state, and cannot stretch in the locking state.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.