TW201909793A - Linking device for seat and seatback by moving forward center of gravity of sitter's body to enhance stability while sitting and leaning backward - Google Patents

Abstract

The present invention provides a linking device for seat and seatback, which is mainly disposed on a separable seat and seatback and comprises a slidable chassis, two armrest racks and a pivoting member connecting the seatback with the seat. In which, the slidable chassis is composed of two slide rails and a slide base, and the two slide rails are fixed at the bottom of the seat, and the slide base is slidingly fitted between the two slide rails. The two armrest racks are fixed on the slide base of the chassis, and extended respectively from left and right out of two sides of the seat, and the rear ends are respectively pivoted with both sides of the seatback. The pivoting member connecting the seat with the seatback comprises a first pivoting base fixed with the seat and a second pivoting base fixed with the seatback, wherein the pivoting ends of the first and second pivoting bases are configured as movable sliding pivots. Thus, the seat and the seatback may form a three-point linking relationship among the sliding point formed on the slidable chassis, the pivoting support point formed by the two armrest racks and the seatback, and the sliding pivots formed by the pivoting member connecting the seat with the seatback. When the seatback is leaned backward, the seat may be linked with the seatback to move forward, so the center of gravity of the sitter's body may be moved forward to enhance the stability while sitting and leaning backward.

Description

 Seat and seat back linkage  

The invention relates to a linkage device between a seat and a seat back. Through the linkage device, the seat back can be moved forward while the seat back is tilted, so that the center of gravity of the occupant can be moved forward to maintain a stable function.

According to the current use of office chairs, in addition to the basic seating function, the need for the reclining function is also increasing. For workers who often sit in office chairs for a long time, such as computer users, an office chair has been As a work chair, rest chair or leisure chair for multi-purpose use, the angle adjustment range of the back of the office chair must meet the above-mentioned multi-purpose function. Therefore, most of the better office chairs have adjustable seat backs. The design of the dip angle, however, the chair with the adjustable reclining design is easy to cause the occupant's center of gravity to move backwards when the occupant is lying on the seat cushion and leaning back against the back of the seat back. It is easy to cause the occupant's center of gravity to fall, and the risk of falling over.

Therefore, some people have created a linkage between the seat cushion and the seat back (application number: No. 104207461), mainly by pivoting the front upper end of the seat back support connected to the back of the seat to a base and in front of the base. The lower end and the middle of the seat back support are respectively provided with front and rear joints whose upper ends are pivoted to the front and rear of the seat cushion, and the front lower end of the seat back support is provided with a shaft extending into the base and at the base A spring force pushing unit that pushes the shaft and a pivotal connection between the front piece and the shaft, so that when the seat back is tilted backward, the seat cushion will move forward slightly, and then The tip is slightly subsided downwards, which makes the occupant's center of gravity move forward and increase the stability and safety when riding on the back. It also makes the exertion of the reclining easier and easy, and the whole ride has the comfort of back and forth shaking. .

However, the disadvantages of this structure are: (1) The distance the cushion advances is limited. (2) The seat cushion and the reclining angle of the chair cannot be inclined at a large angle for the occupant to lie on.

In view of the above-mentioned shortcomings of the seat back adjustment structure of the prior art, the inventors have studied the improvement of these shortcomings, and finally the present invention has been produced.

The main object of the present invention is to provide a linkage between a seat and a seat back, through which the back of the seat can be moved forward while the seat back is tilted, so that the center of gravity of the occupant can be moved forward to maintain stability. .

In order to achieve the above object and effect, the technical means adopted by the present invention include: a sliding chassis, two armrest frames, and a pivoting member connecting the seat and the back of the chair, wherein the sliding chassis is composed of two sliding rails and a sliding seat is formed, the two sliding rails are fixed on the bottom end of the seat, and the sliding seat is sleeved between the two sliding rails; the two handrails are fixed on the sliding seat of the chassis, and protrude from left and right on both sides of the seat In addition, the rear end is pivotally connected to the two sides of the seat back; the pivoting member of the connecting seat and the back includes a first pivoting seat fixed to the seat and a second pivoting fixed to the back of the seat The pivotal end of the first and second pivoting seats is set as a movable sliding pivot point; thereby, the seat and the back of the chair can be formed at the sliding point of the sliding chassis, the two armrests and the chair The pivotal fulcrum formed by the back and the interlocking relationship between the three points of the sliding pivot point formed by the pivotal joints connecting the seat and the back of the seat enable the seat back to be coupled through the seat back when the seat back is tilted backward Displacement forward, so that the occupant's body center of gravity forwards and increases the rider's squat.

As for the detailed construction, application principle, function and effect of the present invention, a complete understanding can be obtained by referring to the following description according to the drawings:

10‧‧‧Sliding chassis

11‧‧‧Slide rails

12‧‧‧Slide

120‧‧‧ hole sets

13‧‧‧ transverse strips

130‧‧‧Positioning holes

20‧‧‧Handrail

21‧‧‧Perforation

30‧‧‧ pivotal parts

31‧‧‧First pivoting seat

310‧‧‧Keyhole

311‧‧‧ horizontal to the surface

312‧‧‧ ‧ ear

313‧‧‧Pivot hole

32‧‧‧Second pivoting seat

320‧‧‧Keyhole

321‧‧‧Vertical board

322‧‧‧ pivoting ears

323‧‧‧Pivot hole

33‧‧‧Bolts

40‧‧‧ seat

41‧‧‧ pivoting piece

42‧‧‧ pivot

50, 50’‧‧‧ back

51‧‧‧Outer seat back

52‧‧‧ Inner seat back

60‧‧‧ Chair feet

61‧‧‧ gas pressure rod

A‧‧‧Sliding point

B‧‧‧ pivot fulcrum

C‧‧‧slip pivot point

D‧‧‧ pivot point

E‧‧‧ Activity pivot point

Fig. 1 is a perspective view showing a first embodiment of the present invention.

Fig. 2 is a perspective view showing the structure of the first embodiment of the present invention.

Fig. 3 is a perspective view showing the structure of another perspective of the first embodiment of the present invention.

Figure 4 is a plan view showing the first embodiment of the present invention.

Fig. 5 is a schematic view showing the first embodiment of the present invention when it is not tilted.

Fig. 6 is a schematic view showing the first embodiment of the present invention when it is tilted.

Fig. 7 is a view showing the operation of the first embodiment of the present invention for riding (when not in the tilting state).

Fig. 8 is a view showing the action (the tilting state) of the first embodiment of the present invention for riding.

Figure 9 is a schematic view of the second embodiment of the present invention (when not in the tilted state).

Fig. 10 is a schematic view showing the second embodiment of the present invention (in the tilting state).

1 is a perspective view of a first embodiment of the present invention, which is a perspective view and a plan view of the structure of FIGS. 2, 3, and 4, and it can be clearly seen that the seat and the back of the device are interlocked with each other. The utility model is mainly provided on a separate seat and a seat back, comprising: a sliding chassis 10, which is composed of two sliding rails 11 and a sliding seat 12, and the two sliding rails 11 are fixed at the bottom end of the seat 40. The sliding seat 12 is sleeved between the two sliding rails 11. In the present embodiment, the two sliding rails 11 are in the shape of a pair of opposite rails, and are connected at the upper end by a plurality of horizontal supporting strips 13 on the horizontal supporting strips 13 The extending ends are provided with the positioning holes 130. The sliding blocks 12 are sleeved in the two sliding rails 11 by the two side wings, and a sleeve hole 120 for connecting the pneumatic feet 61 of the leg 60 is provided at the center.

The two armrests 20 are fixed on the sliding seat 12 of the chassis 10 and extend from the left and right sides of the seat 40, and the rear ends thereof are respectively pivotally connected to the two sides of the seat back 50. In this embodiment, The two armrests 20 are in a "└" shape, and a rear end is vertically provided with a through hole 21, and a pivoting piece 51 is fixed at a seat back 50 opposite to the through hole 21, and the second armrest is fixed by a pivot 52. 20 is pivotally coupled to the seat back 50 to form a pivot fulcrum B.

The pivoting member 30 of the connecting seat 40 and the seat back 50 includes a first pivoting seat 31 fixed to the seat 40 and a second pivoting seat 32 fixed to the seat back 50. The first and second pivots The pivoting ends of the seats 31, 32 are set as movable sliding pivot points C. In the embodiment, the first pivoting seat 31 fixed to the seat 40 is provided with a horizontal plate surface 311 having a plurality of locking holes 310 and two pivoting holes 312 extending parallel to the rear end. The outer end of the ear 312 is provided with a pivot hole 313, and the second pivoting seat 32 fixed to the seat back 50 is provided with a vertical plate surface 321 having a plurality of locking holes 320 extending parallel to the lower end. The pivoting ears 322 and the two pivoting ears 322 are provided with elongated pivot holes 323, and the pivot holes 313 of the first pivoting seats 31 are pivotally connected to each other by a bolt 33.

With the composition of the above-mentioned members, as shown in the simplified diagrams of FIGS. 5 and 6, since the slide rails 11 on both sides of the sliding chassis 10 are coupled to the seat 40, the seat 40 is coupled to the seat 40. A sliding point A of the forward and backward displacement can be formed between the legs 60 of the sliding seat 12, and the armrest frame 20 and the seat back 50 fixed to the sliding seat 12 are provided for the seat back 50 and the leg 60. The pivoting pivot point B of the limiting seat, and the pivoting member 30 of the connecting seat 40 and the seat back 50 is a sliding pivot point C formed by the pivoting ends of the first and second pivoting seats 31 and 32, The seat 40 and the seat back 50 have a pivotal swing of movable sliding; accordingly, the seat 40 and the seat back 50 can be at the sliding point A, the second arm frame 20 and the seat back 50 generated by the sliding chassis 10 The resulting pivot fulcrum B and the interlocking relationship between the joint seat 40 and the pivot point C of the pivoting member 30 of the seat back 50 are such that when the seat back 50 is tilted backward, The armrest frame 20 on the sliding seat 12 and the seat back 50 are restricted by the pivoting fulcrum B. Therefore, the seat 40 and the seat back 50 can be supported by the first and second pivoting seats 31 of the pivoting member 30, Sliding pivot point formed by 32 pivotal ends C pivots the back of the chair, and at the same time, the first pivoting seat fixed at the seat 40 is displaced by the sliding pivot point C, and the seat 40 is moved forward by the sliding chassis 10 at the bottom thereof. When the occupant leans back and the seat back 40 is tilted, the seat 40 can be moved forward through the seat back 50, so that the occupant's body center of gravity moves forward and increases the occupant's backward lying position. (as shown in Figures 7 and 8).

9 and 10 are schematic plan views of a second embodiment of the present invention. As shown in the two figures, it is understood that the structure of the second embodiment of the present invention is based on the first embodiment described above, and the difference lies only in the chair. The back 50' is a double-layered back 51, 52 of the inner and outer sides, wherein the lower position of the outer back 51 is for pivoting the two armrests 20, and the bottom end of the inner back 52 and the rear end of the seat 40 The other part is provided with a pivotal point D-phase pivotal connection, and a joint pivot point E is pivotally connected to the upper end of the inner and outer seat backs 51, 52, whereby the seat back 50' is tilted backward When it is raised, the outer seat back 51 is swung back and forth with the pivot point B of the armrest frame 20, and the bottom end of the inner seat back 52 is pivotally connected with the pivot point D of the rear end of the seat 40, and The upper rear end is provided with a movable pivot point E which is pivotally connected to the outer seat back 51 and can slide relative to each other. Therefore, when the seat 40 is moved forward by the sliding pivot point C of the pivoting member 30, the inner portion is The layer back 52 can be synchronized with the seat 40 to achieve synchronous interlocking slip, whereby the back of the seat back 50' and the seat 40 are at any angle, and the rear end is not There the gap, so that the back of the occupant can be fully 50 'attached to the seat back, in order to enhance comfort when the object person supine.

It should be noted that, in the actual use operation of the above-mentioned seat and the backrest linkage device, the sliding chassis 10 is provided with a control lever to activate the sliding rail 11 and the sliding seat 12 to slide or position, thereby selecting the same. The tilt angle of the back of the chair to be adjusted (because of this structure and its actuation, it is a conventional technique, and is not a feature of the creative technique, so it will not be described here).

In summary, the linkage device of the seat and the back of the present invention has excellent advancement and practicability in the same kind of products, and at the same time, the technical materials of such structures are frequently inspected at home and abroad, and the same is not found in the literature. The structure exists first, so that the present invention already has the invention patent requirements, and the application is filed according to law.

However, the above-mentioned embodiments are merely preferred embodiments of the present invention, and the equivalent structural changes of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

Claims (5)

 The combination of the seat and the back of the chair is mainly disposed on a separate seat and the back of the chair, comprising: a sliding chassis, which is composed of two sliding rails and a sliding seat, the two sliding rails are fixed on At the bottom end of the seat, the sliding seat is sleeved between the two sliding rails; the second armrest frame is fixed on the sliding seat of the chassis, and protrudes left and right on both sides of the seat, and the rear end is respectively opposite to the back of the seat. The side pivotally connects to form a pivoting fulcrum; the pivoting member of the connecting seat and the back of the chair comprises a first pivoting seat fixed to the seat and a second pivoting seat fixed to the seat back, the first The pivotal ends of the first and second pivoting seats are set as movable sliding pivot points.    The interlocking device for the seat and the back of the seat according to the first aspect of the patent application, wherein the two slide rails are in the shape of a pair of ridges, and are connected at the upper end by a plurality of transverse struts, and the transverse struts extend The position holes are set at both ends, and the sliding seat is sleeved in the two sliding rails by the two side wings, and a sleeve hole for connecting the foot and the air pressure bar is arranged at the center.    The interlocking device for the seat and the back of the seat according to claim 1, wherein the two armrests are in the shape of a "└", and a rear end of the rear end is provided with a perforation, and the back of the perforation is opposite to the seat back. A pivoting piece is fixed and the two armrests are pivotally connected to the back of the chair by a pivot.    The interlocking device for the seat and the back of the seat according to the first aspect of the invention, wherein the first pivoting seat fixed to the seat is provided with a horizontal plate surface having a plurality of locking holes and extending parallel to the rear end. The two pivotal ends are perpendicularly disposed, and the outer ends of the two pivotal ears are provided with pivot holes, and the second pivotal seat fixed to the back of the chair is provided with a vertical plate surface having a plurality of keyholes extending parallel to the lower end The two pivotal ears are vertically connected, and the two pivoting ears are provided with long-shaped pivot holes, and the pivot holes of the first pivoting seats are pivotally connected to each other by a bolt.    The interlocking device for the seat and the back of the seat according to the first aspect of the invention, wherein the back of the seat can be a double-layered back of the inner and outer sides, and the lower position of the outer back of the outer seat is pivotally connected to the two armrests, and the The bottom end portion of the inner seat back and the rear end portion of the seat are pivotally connected to each other, and the movable joint is pivotally connected to the upper end of the inner and outer seat backs.