CN103431666B - Chair structure - Google Patents

Abstract

The invention discloses a chair structure, which comprises a base, a chair back, a joint frame, a chair seat, an actuating frame and at least one jacking sheet, wherein a pivoting part is arranged above the base, and a guide rod is arranged at the front side of the base; the joint frame is arranged on the chair back and is pivoted with the pivoting part of the base; the rear end of the chair seat is pivoted with the joint frame; the rear end of the actuating frame is pivoted with the joint frame, the front end of the actuating frame is provided with a sliding sleeve, and the sliding sleeve is arranged on the guide rod; two ends of the jacking piece are respectively pivoted with the front end of the actuating frame and the front of the chair seat, the sliding sleeve is positioned behind the guide rod when the chair back is not tilted backwards, the jacking piece is not unfolded, the joint frame can be driven to connect the actuating frame and the chair seat to move forwards when the chair back is tilted backwards, and the jacking piece can be synchronously unfolded to enable the front end of the chair seat to move upwards; therefore, the main lying and leaning weight of the invention can be positioned on the chair back, thereby having better lying and leaning comfort and better supporting and stabilizing effects.

Description

a seat structure

technical field

The present invention relates to a seat structure, which mainly refers to a kind of seat body weight that can be placed on the back of the chair when the user adjusts from a sitting position to a reclining position, so as to improve reclining comfort and have better support stability.

Background technique

In order to improve the ride comfort, the known seat has an adjustable reclining design of the seat back. As shown in Figure 9, it is one of the known structures. It mainly has a base 1', a seat seat 2', and a seat back 3'. An armrest frame 11' and a guide rod 12' are respectively fixed above and in the center of the base 1'; a sliding sleeve 21' which can be nested with the guide rod 12' is arranged in front of the seat 2', and a pivot is arranged at the rear end of the seat 2'. The connecting part 22'; and the chair back 3' is provided with a pivoting part 31' at the bottom end to be pivotally connected with the pivoting part 21' of the seat 2', and a pivoting part 32' is set in the center and the armrest above the base 1' The rear end of the frame 11' is pivotally connected, so that the seat back 3' and the seat seat 2' can have a smaller riding angle, and the seat back 3' can be reclined, and at the same time drive the seat seat 2' to move forward, and make the chair seat 2' move forward. The sliding sleeve 21' can be displaced to a position in front of the guide rod 12', so that the seat back 3' and the seat 2' can be adjusted to have a larger reclining angle.

However, when the aforementioned structure is reclined, because the seat 2' is only moved forward by the seat back 3', the upward angle θ1 of the front end of the seat 2' is small, so that most of the weight of the human body is still supported by the seat 2' when reclining, which is very difficult. Comfort is less than ideal missing.

Also as shown in Figure 10 is another conventional seat structure, which mainly has a base 4', a seat 5', and a chair back 6', and the seat 5' is provided with a leg rest 51' in front of the seat 5', and the chair seat 5 'A spring 52' is set to engage with the base 4', and the seat back 6' and the seat 5' have a fixed joint angle, and a pivot joint 61' is pivotally connected to the base 4', so that the occupant lies on the seat back When the chair is 6', the chair back 6' and seat 5' can be rotated through the pivot joint 61' and the spring 52' can be stretched to limit the recline angle of the chair back 6', and because the chair seat 5' corresponds to the elevation angle parallel to the ground θ2 can be greatly raised so that most of the user's reclining weight can act on the chair back 6', and it can have better reclining comfort similar to gravity-free flipping.

However, in the aforementioned design, when the seat back 6' is reclined, the seat 5' is correspondingly swayed backward, causing the center of gravity to shift to the position behind the base 4' by a large margin, causing the entire seat to be unstable and topple over. The rising angle θ2 of the seat 5' is much larger than the lying angle of ordinary people, which still causes unsatisfactory lack of comfort.

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides a method in which the main weight of the user can be placed on the back of the chair when the user adjusts from the sitting position to the reclining position to improve the comfort of reclining, and the seat can be moved forward correspondingly when the chair is reclined to provide better Support stability.

The technical solution adopted by the present invention to solve its technical problems is:

A seat structure, comprising: a base on which guide rods are arranged; a chair back device pivotally connected to the base; a control device with one end pivotally connected to the seat back device and the other end sheathed through a sliding sleeve On the guide rod; a seat, the rear end is pivotally connected to the seat back device, and the front end is pivotally connected to the control device; the control device is used to drive the seat seat to extend forward and synchronously drive the front end of the seat seat to rise when the seat back device is reclined.

The chair back device includes a chair back and an engaging frame, the engaging frame is arranged on the chair back, and the engaging frame is pivotally connected to the pivot joint of the base.

The control device includes: an actuating frame, the rear end of which is pivotally connected to the joint frame, and the front end is sleeved on the guide rod through a sliding sleeve; The front end is pivotally connected, and when the chair back is not reclined, the sliding sleeve is located behind the guide rod, and the top holding piece is not unfolded, and when the chair is reclined, it can drive the joint frame to move forward in conjunction with the moving frame and the seat seat, and the top holding piece The upward movement of the front end of the seat can be unfolded synchronously.

The left and right sides of the base are provided with guide rods and upright support columns, and first pivot joints are respectively provided above the two support columns; a third pivot joint is provided under the two side bars of the joint frame, And the fourth pivotal portion is arranged below the third pivotal portion; the fifth pivotal portion is arranged behind the two sides of the seat, and the fifth pivotal portion is pivotally connected with the third pivotal portion of the joint frame, and A sixth pivot joint is provided in front of the fifth pivot joint; the actuating frame is provided with two side rods, and the two side rods are connected by a connecting rod, and the two side rods of the actuating frame There is a seventh pivot joint at the rear of the side rod, and the seventh pivot joint is pivotally connected with the fourth pivot joint of the joint frame, and the eighth pivot joint and the base guide bar that can be joined are arranged in front of the two side pole parts. The sliding sleeve; the top holding piece is provided with two, and the two ends of the two top holding pieces are respectively provided with a ninth pivot joint and a tenth pivot joint, and the ninth pivot joint is connected with the first pivot joint of the actuating frame. The eighth pivotal joint is pivotally connected, and the tenth pivotal joint is pivotally connected with the sixth pivotal joint of the seat.

The present invention also includes a leg rest, the joint frame is provided with a lower pivot joint, and the seat seat is provided with a front pivot joint in front of the sixth pivot joint, and the leg rest is provided in front of the seat seat, and is connected through a connecting rod. It is pivotally connected with the joint frame, and the rear pivot joint is set on one side to be pivotally connected with the front pivot joint of the seat, and the eleventh pivot joint is set; the two ends of the connecting rod are respectively pivoted with the joint frame. The joint part and the eleventh pivot joint part of the legs are pivotally connected.

The present invention also includes two elastic components, and the seat seat is provided with a connecting body behind the sixth pivot joint, and the two ends of the two elastic components are respectively connected to the joint body of the seat seat and the ninth pivot joint of the top holding piece. Position engagement.

The present invention also includes a telescopic rod, and a twelfth pivot joint that can pivotally connect one end of the telescopic rod is arranged under the base, and a fourteenth pivot joint that can pivotally connect the other end of the telescopic rod is arranged at the front end of the seat.

The back of the chair is provided with joining columns under the two sides and at the center of the bottom; The lower bar is provided with an engaging hole to engage with the engaging column of the chair back.

The beneficial effect of the present invention is that: the present invention adopting the above-mentioned structure makes the moving frame move forward when the back of the chair is reclined, thereby driving the top holding piece to unfold and lift up simultaneously when holding the seat forward, and making the seat corresponding to the horizontal direction of the ground to have a Larger included angle; at the same time, the connecting frame can drive the legrest of the connecting rod to unfold, so when the user lies down, the seat has a large upward angle so that most of the body weight can be located on the back of the chair, which can have a better reclining position Comfort, and because the seat not only rises but also moves forward when the back of the chair is reclined, the weight acting on the front and rear sides of the base can be more even and will not tip over, which can have better support stability and safety effects, and at the same time The reclining action of the chair can stretch the elastic component when the moving frame moves forward, and the elastic component can be used to buffer the reclining force of the chair to have better movement smoothness and safety, and the user wants to return the chair back to the unreclined state At this time, the elastic recovery force of the elastic component can be used to facilitate the reverse recovery action of the chair back.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is an exploded view of the first embodiment of the present invention;

Fig. 2 is an assembled view of the chair back in the unreclined state of the first embodiment of the present invention;

Fig. 3 is a side view of the first embodiment of the present invention when the chair back is not reclined;

Fig. 4 is a perspective view of the backrest state of the chair of the first embodiment of the present invention;

Fig. 5 is a side view of the first embodiment of the present invention when the chair is reclined;

Figure 6 is an exploded view of the second embodiment of the present invention;

Fig. 7 is a side view of the second embodiment of the present invention when the chair back is not reclined;

Fig. 8 is a side view when the chair of the second embodiment of the present invention is reclined;

Fig. 9 is a schematic diagram of a conventional seat structure;

Fig. 10 is a schematic diagram of another known seat structure.

Explanation of symbols in the figure:

1 Base 11 Support column 12 First pivot joint

13 Guide rod 14 Armrest frame 15 Twelfth pivot joint

2 Seat back 21 Joint column 3 Joint frame

31 Side rod 311 Engagement hole 32 Lower rod

321 Engagement hole 33 Second pivot joint 34 Third pivot joint

35 Fourth pivot joint 36 Lower pivot joint 4 Seat

41 Fifth pivot joint 42 Sixth pivot joint 43 Front pivot joint

44 joint body 45 fourteenth pivot joint 5 actuating frame

51 side rod part 52 connecting rod part 53 seventh pivot joint part

54 Eighth pivot joint 55 Sliding sleeve 6 Top holding piece

61 Ninth pivot joint 62 Tenth pivot joint 7 Leg rest

71 Connecting rod 72 Rear pivot joint 73 Eleventh pivot joint

8 elastic components 9 telescopic rods

1'sleeve 11'armrest frame 12'guide rod

2'seat 21'sliding sleeve 22'pivot joint

3'Back 31'Hinge 4'Base

5' Seat 51' Leg Rest 6' Back

61' hinge

detailed description

Referring to Figures 1 to 3, as shown in the figure is the first embodiment of the present invention, which specifically includes a base 1, a chair back 2, an engaging frame 3, a seat 4, an actuating frame 5, two The top holding piece 6, one leg rest 7, two elastic components 8, and the left and right sides of the base 1 are provided with upright support columns 11, and the first pivot joints 12 are respectively arranged above the two support columns 11, and the front A guide rod 13 is arranged below the side, and an armrest frame 14 is connected above the support column 11, and the armrest frame 14 is joined with the front end of the guide rod 13.

The chair back 2 is provided with engaging columns 21 at the bottom of the two sides and at the center of the bottom.

The joint frame 3 is located at the front position of the bottom of the chair back 2, including two side bars 31, and a lower bar 32 is arranged below the two side bars 31 to connect, and the two side bars 31 and the lower bar 32 are provided with engaging holes 311, 321 and the seat back. 2, the joint column 21 is joined, and the second pivotal part 33 is arranged on the two side bars 31 to be pivotally connected with the first pivotal part 12 of the base 1, and the third pivotal part 34 is set under the two side bars 31, and A fourth pivotal portion 35 is disposed below the third pivotal portion 34 , and a lower pivotal portion 36 is disposed on the lower rod 32 .

The seat seat 4 is provided with a fifth pivot joint 41 behind both sides, and the fifth pivot joint 41 is pivotally connected with the third pivot joint 34 of the joint frame 3, and a sixth pivot joint is arranged in front of the fifth pivot joint 41. Connecting portion 42 , and a front pivoting portion 43 is provided in front of the sixth pivoting portion 42 , and an engaging body 44 is disposed behind the sixth pivoting portion 43 .

The rear end and the front end of the actuating frame 5 are engaged with the engaging frame 3 and the guide rod 13 of the base 1 respectively, and the actuating frame 5 includes rod portions 51 on both sides, and the rod portions 51 on both sides are connected by a connecting rod portion 52. The seventh pivot joint 53 is arranged behind the poles 51 on both sides, and the seventh pivot joint 53 is pivotally connected to the fourth pivot joint 35 of the joint frame 3, and the eighth pivot joint is arranged in front of the poles 51 on both sides. 54 and the sliding sleeve 55 that can engage the guide rod 13 of the base 1.

The two ends of the two top holding pieces 6 are pivotally connected with the actuator frame 5 and the seat 4 respectively, and the ninth pivot joint 61 and the tenth pivot joint 62 are respectively arranged at the two ends of the top holding piece 6 , and the ninth pivot joint The portion 61 is pivotally connected to the eighth pivotal portion 54 of the actuator frame 5 , and the tenth pivotal portion 62 is pivotally connected to the sixth pivotal portion 42 of the seat 4 .

The leg rest 7 is arranged in front of the seat 4, and the connecting rod 71 is pivotally connected with the joint frame 3, so that the leg rest 7 can be folded and expanded corresponding to the seat 4, and the leg rest 7 is provided with a rear pivot joint 72 on one side. It is pivotally connected with the front pivotal part 43 of the seat 4; the eleventh pivotal part 73 is provided; and the two ends of the connecting rod 71 are respectively connected with the eleventh pivotal part 36 under the joint frame 3 and the eleventh pivotal part of the leg rest 7 Part 73 is pivotally connected.

The two ends of the elastic component 8 are respectively jointed with the connecting body 44 of the seat 4 and the ninth pivotal portion 61 of the holding piece 6 .

The sliding sleeve 55 of the moving frame 5 can be positioned at the rear position of the guide rod 13 when the seat back 2 is not reclined after the combination of the present invention, and the leg rest 7 is in a folded state, and the top holding sheet 6 is in an undeployed state.

As shown in Fig. 4 and Fig. 5, the present invention adopting the above-mentioned structure can drive the joint frame 3 to pivot at the position corresponding to the first pivot portion 12 of the base 1 when the chair back 2 is reclined, and the joint frame 3 can be moved. The moving frame 5 and the seat 4 move forward and the sliding sleeve 55 is positioned at the front position of the guide rod 13, and because the front of the guiding rod 13 is connected with the armrest frame 14, the forward distance of the sliding sleeve 55 can be limited, and the moving frame 5 can be moved forward. Drive the top holding piece 6 to expand in the vertical direction and lift the seat 4 forward synchronously, so that the seat 4 can have a larger angle θ3 corresponding to the horizontal direction of the ground, and the joint frame 3 can drive the connecting rod 71 and the legs When the user is reclining, most of the body weight can be placed on the seat back 2 due to the large upward angle of the seat 4 when reclining, which can provide better reclining comfort. The seat 4 also moves forward in addition to rising, so the weight acting on the front and rear sides of the base 1 is more even and will not tip over, which can have better support stability and safety effects.

When the seat 4 of the present invention is lifted up, the front end of the seat 4 can be supported by the joint of the top holding piece 6 and the sliding sleeve 55 with the guide rod 13, so that the front end of the seat 4 can be supported. When moving forward, the elastic component 8 can be stretched, and the reclining force of the chair back 2 can be buffered by the elastic component 8 so as to have better movement smoothness and safety. The elastic recovery force of the elastic component 8 is used to make the seat back 2 recover.

Referring to Fig. 6 and Fig. 7, as shown in the figure is the second specific embodiment of the present invention, which is roughly the same as the first specific embodiment, except that it also includes a telescopic rod 9, and no spring is provided, and The bottom of the base 1 is provided with a twelfth pivot joint 15 that can be pivotally connected to one end of the telescopic rod 9, and a fourteenth pivot joint 45 that can be pivotally connected to the other end of the telescopic rod 9 is provided at the front end of the seat 4. The rod 9 is linked by the motor, so that when the telescopic rod 9 is closed, the chair back 2 can be positioned in the unreclined state, and when the telescopic rod 9 is unfolded as shown in Figure 8, it can directly drive the seat 4 forward, and the seat 4 Drive the moving frame 5 to move forward, the top holding piece 6 to unfold, the chair back 2 to lean back, and the leg rest 7 to unfold simultaneously, so that the present invention can have the effect of lying comfortably and having a stable center of gravity and safety. The chair back 2 can be forced to recline or retract automatically, which can provide better operation convenience.

Based on the above description, the present invention can have the comfort effect of approaching gravity-free deflection when the chair is reclined, and most of the weight acts on the back of the chair when reclining, and the seat can be moved forward and raised correspondingly, which can be more comfortable. Good dynamic stability and stable center of gravity safety effect, and the leg rest of the present invention can also have the appeal effect of the present invention when it is not installed, and the sliding sleeve of the present invention can also be set as a locking device that can be locked with the guide rod (in the figure Not marked) to have a better positioning effect, and the foregoing specific implementation is an example of the present invention, not a limitation of the present invention, and any equivalent changes made according to the spirit of the present invention should also fall within the scope of the present invention.

Claims (6)

1. A seat structure, characterized in that it comprises: a base, a guide rod is arranged on the base; a chair back device, pivotally connected with the base; a control device, one end of which is pivotally connected to the chair back device, and the other One end is sleeved on the guide rod through a sliding sleeve; a seat, the rear end is pivotally connected to the seat back device, and the front end is pivotally connected to the control device; the control device is used to drive the seat forward to extend and drive synchronously when the seat back device is reclined The front end of the seat rises; the chair back device includes a chair back and an engaging frame, the engaging frame is arranged on the seat back, and the engaging frame is pivotally connected to the pivot joint of the base; the control device includes: an actuating frame, a rear The end is pivotally connected to the joint frame, and the front end is sleeved on the guide rod through a sliding sleeve; at least one top holding piece, the two ends of the top holding piece are respectively pivotally connected to the front end of the actuator frame and the front end of the seat, so that the back of the chair does not recline When the sliding sleeve is located at the rear of the guide rod, and the top holding piece is not unfolded, and when the chair is reclined, it can drive the joint frame to move forward in conjunction with the moving frame and the seat seat, and the top holding piece can simultaneously expand the front end of the seat to move up. 2. A seat structure according to claim 1, characterized in that guide rods and upright support columns are provided on the left and right sides of the base, and first pivot joints are respectively provided above the two support columns. part; the third pivot joint is provided under the rods on both sides of the joint frame, and the fourth pivot joint is provided below the third pivot joint; the fifth pivot joint is provided behind both sides of the seat, and The fifth pivot joint is pivotally connected to the third pivot joint of the joint frame, and the sixth pivot joint is provided in front of the fifth pivot joint; the actuating frame is provided with two side rods, and the two The side rods are connected by connecting rods, and the seventh pivot joint is arranged behind the two side rods of the actuator frame, and the seventh pivot joint is pivotally connected with the fourth pivot joint of the joint frame, and the The eighth pivot joint and the sliding sleeve that can be joined to the base guide rod are arranged in front of the two side rods; two top holding pieces are provided, and the ninth pivot joint, The tenth pivot joint, the ninth pivot joint is pivotally connected to the eighth pivot joint of the actuating frame, and the tenth pivot joint is pivotally connected to the sixth pivot joint of the seat. 3. A seat structure according to claim 2, characterized in that: it also includes a leg rest, the joint frame is provided with a lower pivot joint, and the seat seat is provided with a front pivot in front of the sixth pivot joint The connecting part, and the leg is arranged in front of the seat, and is pivotally connected with the joint frame through a connecting rod, and the rear pivoting part is arranged on one side to be pivotally connected with the front pivoting part of the seat, and the tenth A pivot joint; and the two ends of the connecting rod are respectively pivotally connected to the pivot joint under the joint frame and the eleventh pivot joint of the leg rest. 4. A seat structure as claimed in claim 2 or 3, characterized in that: it also includes two elastic components, and the seat seat is provided with a joint at the position behind the sixth pivot joint, and the two elastic components The two ends of the seat are respectively jointed with the junction body of the seat and the ninth pivot joint of the top holding piece. 5. A seat structure as claimed in claim 2 or 3, characterized in that: it also includes a telescopic rod, and a twelfth pivot joint that can be pivotally connected to one end of the telescopic rod is arranged under the base, and is mounted on the chair. The front end of the seat is provided with a fourteenth pivot joint that can pivotally connect the other end of the telescopic rod. 6. A seat structure as claimed in claim 2 or 3, characterized in that: said chair back is provided with engaging columns under both sides and in the center of the bottom; Two side bars, the bottom of the two side bars are connected by a lower bar, and the two side bars and the lower bar are provided with engaging holes to engage with the engaging posts of the chair back.