阅读说明：本技术 带有抬腿板的坐躺两用办公座椅 (Sitting and lying dual-purpose office chair with leg lifting plate ) 是由 李志斌 于 2019-12-04 设计创作，主要内容包括：本发明公开了一种带有抬腿板的坐躺两用办公座椅,本发明涉及办公家具领域,本发明采用独特的方式通过四杆机构巧妙的完成座椅从坐姿态到躺倒姿态的轻松转换,在此转换过程中无需做任何动作,只需身体向后躺,小腿板7就自动抬起。本发明采用独有的利用四杆机构摆动杆5的被制动来完成在任一躺倒姿态的锁定,彻底改变在靠背板1底部制动的方式及其弊端,本发明采用了传统的机械传动方式,巧妙的运用四杆机构的两重组合联动,使得本发明使用起来更加可靠,座椅到躺椅之间转换自如简单方便。其显著的优点是只要身体躺倒小腿就被小腿板7抬起,简单舒适。(The invention discloses a sitting and lying dual-purpose office chair with a leg lifting plate, which relates to the field of office furniture, and skillfully completes the easy conversion of the chair from a sitting posture to a lying down posture through a four-bar mechanism in a unique mode, and the lower leg plate 7 can be automatically lifted only by lying backwards without any action in the conversion process. The invention adopts the unique mode of braking the four-bar mechanism swinging rod 5 to complete the locking of any lying down posture, thoroughly changes the mode of braking the bottom of the backboard 1 and the defects thereof, adopts the traditional mechanical transmission mode, skillfully utilizes the double-combination linkage of the four-bar mechanism, and ensures that the invention is more reliable to use, and the conversion from the chair to the deck chair is free, simple and convenient. The obvious advantage is that the shank plate 7 can lift the body as long as the body lies down, and the body is simple and comfortable.)

1. The sitting and lying dual-purpose office chair with the leg lifting plate is mainly characterized in that when the chair is in a sitting posture, the backrest plate 1 is upright and forms an included angle of 90 degrees with the seat plate 3, the seat plate 3 is fixed with the base 9 and slightly inclines with the ground, the shank plate 7 is collected under the seat plate 3, and when the chair is in a lying postureWhile the back board 1 is around the axis O₃The counterclockwise direction inclination and the seat plate 3 form a inching angle, the angle between the shank plate 7 and the seat plate 3 is 180 degrees, the upper plane is aligned, the conversion of the sitting posture and the lying posture is carried out under the constraint of a four-bar mechanism, and the posture conversion mode is a linkage posture conversion mode.

2. The two state conversion of the sitting and lying dual-purpose office chair with the leg-lifting plate as claimed in claim 1 is realized by a traditional mechanical way and by adopting a combined motion of multiple four-bar mechanisms, the back-rest plate 1 and the lower leg plate 7 are driven by one action of the back-rest plate 1 to complete the conversion from the sitting posture to the lying posture, and the conversion from the lying posture to the sitting posture is completed by only clockwise action of the swinging rod 5 when the lying posture is changed to the sitting posture.

3. In the action conversion according to claim 2, when converting from the chair to the deck chair, the control arm rest 4 is manually and slightly lifted counterclockwise, the brake device 8 is in the release state, the first layer of four-bar mechanism can be unfolded, the first layer of four-bar mechanism is composed of the back board 1, the armrest rod 2, the swinging rod 5 and the base 9, because the brake device 8 is in the release state, the swinging rod 5 is not constrained in rotation, under the action of the back board 1, the swinging rod 5 is pulled by the armrest rod 2 to enable the back board to lie down to form an obtuse included angle with the seat board 3, under the action of the first layer of four-bar mechanism, the second layer of four-bar mechanism is composed of the swinging rod 5, the shank board 7, the connecting rod 6 and the base 9 (the seat board 3 is fixed on the base 9), under the action of the swinging rod 5, the leg board 7 is pushed upwards until the seat is flat, the control armrest 4 is lifted up to enable the brake device 8 to be in a relaxed state, the swinging rod 5 in the four rods of the first layer starts to act under the action of the spring force 10, the backrest plate 1 is pulled to return to the position plate 3 through the armrest rod 2, an included angle of 90 degrees is formed between the backrest plate and the position plate 3, meanwhile, the four rods of the second layer enable the connecting rod 6 to pull the shank plate 7 to be folded under the position plate 3 under the action of the swinging rod 5, and therefore the conversion from the reclining chair to the seat is completed.

4. According to the invention, as described in claim 3, when the brake device 8 is in a release state, the rotation of the swing rod 5 is not restricted, and when the brake device 8 is in a brake state, the rotation of the swing rod 5 is restricted, which is one of the appeal of the invention, and the invention ensures the stability of the posture of the seat and the deck chair just because of the function of the swing rod 5, and is different from other seats, the invention installs the brake device at the lower end of the swing rod 5 to achieve the purpose of braking and driving the first layer of four-bar mechanisms, thereby enabling the second layer of four-bar mechanisms to be linked.

Technical Field

The invention relates to the field of office furniture.

Background

In the office furniture industry, a great number of office chairs with various styles and dual purposes of sitting and lying are available, the chairs on the market realize the lying function of the chair by the same method, the basic method is that when a backboard lies down, the function that the backboard can lie down is achieved by the instant braking of a set of braking device at the bottommost part of the backboard, because the braking point is the bottommost part of the backboard, the use or design angle is unreasonable, the backboard needs to bear large acting force, the backboard and the backboard bottom need to have larger strength, in addition, the chairs which can lie are not provided with plates for placing legs, the arrangement of individual plates for placing legs also needs to pull out the plates to use the function of lying, the invention has completely new design aiming at the above, the mode of braking by the bottom of the back board is thoroughly changed, the mechanical mode is adopted to lift the crus of the crus board together when the seat is in the lying down posture, no other article on the backrest folding seat is needed to be pulled, the use is extremely simple and convenient, the lying down posture of the back board is completed under the action of a set of four-bar mechanisms, and the hidden strength danger of the back board is thoroughly changed.

Disclosure of Invention

The chair of the invention is very simple and convenient to use, and in use, the body can be laid down to any angle (within the maximum lying angle) by slightly lifting the control armrests 4 with hands, during which the shank plates 7 lift the shank together, and the movement stops as soon as the hands are released. The seat plate 3 is fixed on the base 9 and is fixed relative to the base 9, the backrest plate 1 is hinged with the base 9 at the bottommost part, and the shank plate 7 is hinged with the fixed seat plate 3. When the backrest plate 1 is retracted and is in a seat state with the seat plate 3, the lower leg plate 7 is collected under the seat plate 3.

Drawings

Fig. 1 is a schematic view of a sitting posture of a sitting and lying office chair with a leg-raising plate according to the present invention, fig. 1 a is a front view of the chair in the sitting posture, fig. 1 b is a side view of the sitting posture, fig. 1 c is a three-dimensional effect view of the sitting posture, fig. 2 is a schematic view of the sitting and lying office chair with the leg-raising plate according to the present invention in the lying posture, fig. 2 a is a front view of the chair in the lying posture, fig. 2 b is a side view of the lying posture, and fig. 2 c is a three-dimensional effect view of the lying posture. To explain the operation of the present invention in detail, in particular, in fig. 1 and 2, the axes used for the mechanism motion are numbered from O₁To O₈The parts are marked as follows: 1 back rest board, 2 handrail rods, 3 seat boards, 4 control handrails, 5 swinging rods, 6 connecting rods, 7 calf boards, 8 braking devices, 9 bases and 10 springs, and as can be seen from figures 1 and 2, the back rest board of part number 1 has an axis O₁、O₃The part number 2 handrail rod is provided with an axis O₁、O₂、O₈The seat plate of part number 3 is provided with an axis O₆The part number 5 swinging rod is provided with an axis O₈、O₄、O₅The base of the part number 9 is provided with an axis O₃、O₄The 6 connecting rod of the part number is provided with an axis O₅、O₇The shank plate of part number 7 has an axis O₆、O₇。

Detailed Description

The invention is explained in detail with the attached drawings, the invention adopts the traditional mechanical four-bar mechanism, and the mutual conversion between the sitting posture and the lying posture is free and simple when in use. The state of the backrest plate 1, the seat plate 3 and the shank plate 7 in the sitting posture can be seen from figure 1, the state is mainly characterized in that the backrest plate 1 is hinged with the base 9, the seat plate 3 is fixed on the base 9, the included angle between the backrest plate 1 and the seat plate 3 is 90 degrees, the shank plate 7 is hinged with the seat plate 3 and is accommodated under the seat plate 3, the brake device 8 is arranged at the lower end position of the swinging rod 5, the state of the seat converted from the sitting posture to the lying-down posture can be seen from figure 2, the backrest plate 1 is hinged with the axis O at the leftmost end₃An obtuse angle is formed between the lower leg plate 7 and the seat plate 3, the seat plate 3 has no difference between the middle position and the sitting posture, and the lower leg plate 7 and the seat plate 3 are hinged on the axis O₆And the upper plane is flush with the upper plane with an included angle of 180 degrees between the seat plate 3.

Referring to the drawings, how to realize the two-state conversion will be described, first, the mechanisms in the drawings are described, and as can be seen from fig. 1 and 2, the back board 1, the grab bar 2, the swinging rod 5 and the base 9 form a four-bar mechanism, in which one end of the back board 1 is hinged to the axis O3 (refer to fig. 1 and 2) of the base 9 and one end of the grab bar 2 are hinged to the axis O₁The middle section of the swinging rod 5 is hinged with the base 9 at the axle center O₄The other end is hinged with the handrail rod 2 at the axle center O₈. Fig. 1 and 2 also show that the lower leg plate 7, the connecting rod 6, the swinging rod 5 and the base 9 also form a four-bar mechanism, wherein the O can be fixed on the base 9 because the seat plate 3 is fixed on the base 9₆Is regarded as the axle center on the base, so that the four rods are that the middle section of the swinging rod 5 is hinged with the base 9 on the axle center O₄The other end is hinged with the connecting rod 6 at the axle center O₅The other end of the connecting rod 6 is hinged with the shank plate 7 at the axle center O₇The lower leg plate 7 andthe seat plate 3 is hinged on the axle center O₆. The main mechanism of the two state transition is described.

Turning now to the detailed description of the motion conversion process of the present invention, looking first at how to convert a chair into a lounge chair, referring to FIG. 1, the armrest 4 will be controlled about an axis O₂When pulled up counterclockwise, the brake device 8 is in the non-braking state, and the swing rod 5 can rotate around the axis O₄Rotate when the backboard 1 rotates around the axle center O₃When rotating counterclockwise, the grab bar 2 pulls the swing rod 5 counterclockwise around the axis O₄When the other four-bar linkage swinging rod 5 rotates, the connecting rod 6 pushes the shank plate 7 to rotate around the axis O in a counterclockwise direction₆When the back board 1 rotates counterclockwise to the position shown in fig. 2, the control armrest 4 is put down, the brake device 8 is in the brake state, and the conversion from the sitting posture to the lying posture is completed. Turning now to how to change from the lying position to the sitting position, referring to fig. 2, the armrest 4 will be controlled about the axis O₂When the brake device 8 is in the non-braking state by pulling up counterclockwise, the swing rod 5 can rotate around the axis O₄The oscillating lever 5 is now rotated clockwise about the axis O by the spring 10₄Rotate, under the action of which the grab bar 2 pulls the backrest plate 1 clockwise around the axis O₃Rotation, pivoting of the oscillating lever 5 about the axis O₄To push the connecting rod 6 to make the shank plate 7 rotate around the axis O₆The control arm rest 4 is put down by rotating clockwise, and the braking device restores the braking state, thus completing the conversion process from the lying posture to the sitting posture. The foregoing is merely an example of the present invention and various modifications and changes may occur to those skilled in the art, and it is intended to cover in the appended claims any and all changes that fall within the true spirit and scope of the invention.