TWM456754U - Base device enabling seat back to move back and forth while tilting - Google Patents

Description

Base device for moving the back of the chair back and forth as it reclines

The present invention relates to the movement of the back and forth of the chair when the seat back is tilted, so that the back of the occupant does not slide on the back of the back due to the tilting movement of the back, thereby enhancing the back of the chair. The comfort of riding back on the back when adjusting.

As far as the office chair backs are known, most of them have the functions of elastic tilting and adjusting the tilting angle, and usually the seat cushion of the chair is fixed on a base combined with the legs, and a spring is pivoted in the base. Resisting and elastically turning, the seat back frame fixed for the back of the chair, and at the inner end of the seat back frame, a plurality of reclining angle positioning blocks are fixed, and the corresponding base is The positioning piece is elastically inserted into any of the grooves, and the purpose is to embed the positioning piece in the corresponding groove after the chair back is tilted to the preferred angle of inclination, so that the seat back is fixed and cannot be fixed. Further tilting, and thus achieving the purpose of tilting and positioning of the seat back, as shown in Taiwan Patent No. 392473, 496133.

However, both the seat cushion and the seat back are originally separate bodies. When the seat back is tilted back and forth, the seat cushion is usually fixed, and the seat back can only be pivoted relatively at a fixed center. When the occupant rides on the seat cushion, the back rests against the back of the seat, while the back side of the hip sitting on the seat cushion usually has a slight distance from the back of the seat, or even if it is tightly attached to the back of the seat. Because the occupant's buttocks are not moving, the back is tilted forward and backward with the waist as the center of the swing. The seat cushion of the other chair is also fixed, and the back of the chair is at the base below the seat cushion. Turn the center of the pendulum and do the tilting motion.

Therefore, the back of the human body and the back of the chair, the center positions of the swings are completely different, and there is a distance between the upper and lower sides, so when the back of the occupant leans back with the back of the chair, the original occupant is stuck on the back. The position on the back of the chair will change, that is, the back of the occupant will slide down on the back of the chair, which will cause frictional discomfort, and will also make the dress messy due to friction pulling, so the back of the chair When reclining backwards with a large amplitude, the back of the occupant usually gets up or twisted slightly to alleviate the above discomfort and avoid messy clothing.

In addition, since the back of the seat back is tilted and the back of the seat slides downward, it also causes the occupant's head to stand against the original position of the headrest.

The reason is that in order to improve the backward tilting adjustment of the back of the seat back, the original occupant leans against the position of the back of the chair and may slip and feel uncomfortable. The present invention provides a seat back when the back of the seat back is tilted and adjusted. The seat back frame is placed on the base of the seat cushion. In addition to the tilting of the tilting seat, the seat back seat will move with the front and rear movements, so that the occupant rests on the back of the seat. constant.

The technical solution adopted by the novel to solve the technical problem is as follows: a seat back frame seated in the base is elastically tilted and swings, and a shaft solid hole is arranged in the middle of the side of the base, and the corresponding seat is provided A horizontal guide slot is provided at a later position of the back frame, and a first shaft is inserted into the horizontal guide slot hole, and the two ends of the shaft are fixed in the shaft fixing hole of the base; In addition, corresponding oblique inclined sliding slot holes are respectively arranged on the bases on both sides of the shaft fixing holes of the base, and the seat back brackets on both sides of the horizontal guiding sliding slot of the corresponding seat back bracket are respectively set There are shaft fixing holes, and then the second shaft shafts are respectively fixed in the shaft fixing holes of the seat back frame, and the two ends of the second shafts are respectively disposed through the inclined guide grooves of the corresponding bases. In the hole.

Therefore, the horizontal guide slot formed through the first shaft of the above-mentioned new seat back frame, in addition to the center of the seat back seat, can be turned and moved forward and backward, and at the same time Through the two opposite inclined guide slots of the base, the second shaft corresponding to the shaft on the seat back base is rotated along the inclined guide slot, thereby enabling the seat back seat (ie, the seat back) ) While tilting and turning, it also moves back and forth, allowing the occupant to lean back on the back of the chair, which can remain unchanged at all times, increasing the comfort of reclining when the back of the chair is tilted.

1‧‧‧Base

10‧‧‧Slide

11‧‧‧Axial hole

12‧‧‧Slanted guide slot

2‧‧‧back seat stand

21‧‧‧ horizontal guide slot

22‧‧‧ Axial hole

23‧‧‧Perforation

31‧‧‧First shaft

32‧‧‧Second shaft

321‧‧‧Spring inner sleeve

4‧‧‧ Spring

41‧‧‧ outside foot

42‧‧‧ middle foot

5‧‧‧ tilt angle positioning block

51‧‧‧ditch

6‧‧‧ Positioning film

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic perspective view of the present invention.

2 is a perspective exploded view of the present invention.

Fig. 3 is a perspective exploded view of the present invention.

Figure 4 is a plan view of the present invention.

Figure 5 is a side cross-sectional view of the present invention.

Fig. 6 is a side view showing the seat back frame of the present invention before adjustment.

Figure 7 is a side elevational view of the seat back frame of the present invention after adjustment.

Referring to FIG. 1 , the present invention includes a base 1 for fixing a seat cushion and being combined with the foot of the chair, and a swinging arm for the seat back or the seat back bracket is mounted in the base 1 . The seat back base 2 which is provided with the back of the chair can be elastically tilted, and at the same time, as shown in Figs. 2 to 3, wherein the base 1 has a shaft fixing hole 11 in the middle of the side of the abdomen, and the corresponding seat back frame A horizontal guide slot 21 is defined in the rear side of the seat 2, and then a first shaft 31 is disposed in the shaft hole 11 and the horizontal guide slot 21 to be pivoted. That is, the seat back stand 2 is mainly turned around the first shaft 31 and has a moving ability of front and rear displacement.

Further, the base 1 on both sides of the shaft fixing hole 11 is respectively provided with inclined guide groove holes 12 which are correspondingly opened obliquely, and chairs on both sides of the horizontal guide groove 21 at the corresponding positions The back frame base 2 is provided with two shaft fixing holes 22, and then each of the second shaft rods 32 is respectively disposed at the same time. The corresponding inclined guide slot 12 and the shaft fixing hole 22 of each side are pivoted, that is, the second shaft 32 fixed on the seat back base 2 is inclined along the two sides of the base 1 to guide the sliding slot 12 The sliding causes the front and rear displacement of the seat back base 2.

Next, a spring inner sleeve 321 is disposed on the second shaft 32 on the rear side of the seat back base 2, and then the spring 4 is sleeved on the outer periphery of the spring inner sleeve 321 while the ends of the two outer legs 41 of the spring 4 are Wearing the perforation 23 at a later position of the seat back base 2, and the intermediate leg 42 of the spring 4 abuts against the base 1, thereby allowing the seat back base 2 (ie, the seat back) to have an elastic tilting swing capability. ;also. At the front end of the seat back base 2, a tilting angle positioning block 5 having a plurality of recessed grooves 51 is fixed, and a base 1 corresponding to the tilting angle positioning block 5 is disposed on a slideway 10 The positioning piece 6 which is pushed upward by the elastic force, as shown in FIGS. 4 to 5, when the positioning piece 6 is retracted into the slide 10 to swing the seat back stand 2 to a predetermined position, The positioning piece 6 is elastically inserted into the recess 51 corresponding to the tilting angle positioning block 5, so that the seat back base 2 (ie, the seat back) after the tilting angle is adjusted is positioned and fixed.

Therefore, as shown in FIG. 6, the seat back stand 2 (ie, the seat back) is in a state of standing upright for the back of the occupant, and the front and rear second shafts 32 are respectively located on the base 1. Below and above the inclined guide slot 12, but when the seat back base 2 is as shown in FIG. 7, after the first shaft 31 is turned to the center and tilted backward, the front and rear second shafts 32 will Along the two inclined guide slot holes 12 of the base 1, in addition to the upper and lower transfer, it is moved forward by being resisted, that is, the seat back mount 2 (ie, the seat back) is slightly displaced forward.

The reason is that when the occupant tilts the seat back seat 2 (ie, the seat back) backwards, the occupant's back leans back on the back of the chair before leaning back, not because the seat back follows the seat back seat 2 The forward movement causes the occupant to slide and rub against the back of the seat, that is, regardless of how the back of the seat adjusts the angle of inclination, the position of the occupant leaning against the back of the chair remains unchanged, thereby enhancing the ride. Rely on the comfort of adjustment without the discomfort of sliding friction.

1‧‧‧Base

10‧‧‧Slide

11‧‧‧Axial hole

12‧‧‧Slanted guide slot

2‧‧‧back seat stand

21‧‧‧ horizontal guide slot

22‧‧‧ Axial hole

23‧‧‧Perforation

31‧‧‧First shaft

32‧‧‧Second shaft

321‧‧‧Spring inner sleeve

4‧‧‧ Spring

41‧‧‧ outside foot

42‧‧‧ middle foot

6‧‧‧ Positioning film

Claims (1)

A base device for moving the back of the chair back and forth along with tilting, comprising a base back pivoting a seat back seat that can be tilted and tilted, wherein a fixed hole is arranged in the middle of the side of the base, and the corresponding portion is The rear seat frame is later provided with a horizontal guide slot, and a first shaft is disposed in the horizontal guide slot hole, and the two shaft ends are fixed in the shaft hole. Further, on the bases on both sides of the shaft fixing hole, there are corresponding inclined guide sliding slot holes, and the seat back brackets corresponding to the two sides of the horizontal guiding sliding slot are respectively provided with shaft fixing holes, and then Further, each of the second shafts is fixed to the shaft fixing hole of the seat back frame, and the two ends of the second shafts are respectively disposed in the inclined guide slot holes of the corresponding base.