阅读说明：本技术 一种座椅功能架的靠背倾仰机构 (Backrest inclining mechanism of seat functional frame ) 是由 赵涌 阮正富 于 2018-06-15 设计创作，主要内容包括：本发明涉及一种座椅功能架的靠背倾仰机构,包括设置在固定架左右两侧且左右对称设置的第一靠背辅助组件及第二靠背辅助组件,第一靠背辅助组件和第二靠背辅助组件分别位于固定架的后部和前部；第一靠背辅助组件包括便于靠背组件倾仰和回复的一滑轨和设置在滑轨内的滑轮,第二靠背辅助组件包括便于靠背组件倾仰回复的相互铰接连接的辅助连接件A、辅助连接件B和辅助连接件C。与现有技术相比,本发明在固定架的前部和后部两个地方分别第一靠背辅助组件和第二靠背辅助组件,对前部和后部都产生有利于靠背组件倾仰和回复的力,对于低矮功能架、非电动功能架等功能架上的靠背组件在倾仰倒下和回复过程中都能运行顺畅、省力。(The invention relates to a backrest inclining mechanism of a seat functional frame, which comprises a first backrest auxiliary component and a second backrest auxiliary component which are arranged on the left side and the right side of a fixed frame and are arranged in a bilateral symmetry manner, wherein the first backrest auxiliary component and the second backrest auxiliary component are respectively positioned at the rear part and the front part of the fixed frame; the first backrest auxiliary assembly comprises a sliding rail and a pulley, the sliding rail is convenient for the backrest assembly to incline and return, the pulley is arranged in the sliding rail, and the second backrest auxiliary assembly comprises an auxiliary connecting piece A, an auxiliary connecting piece B and an auxiliary connecting piece C which are convenient for the backrest assembly to incline and return and are hinged with each other. Compared with the prior art, the first backrest auxiliary assembly and the second backrest auxiliary assembly are respectively arranged at the front part and the rear part of the fixing frame, so that the force which is beneficial to the inclination and the return of the backrest assembly is generated for the front part and the rear part, and the backrest assembly on the functional frames such as a low functional frame, a non-electric functional frame and the like can run smoothly and labor-saving in the inclination, the falling and the return processes.)

1. The utility model provides a back of seat function frame mechanism of inclining which characterized in that: the backrest comprises a first backrest auxiliary component (510) and a second backrest auxiliary component (520) which are arranged on the left side and the right side of a fixing frame (100) and are arranged in a bilateral symmetry mode, wherein the first backrest auxiliary component (510) and the second backrest auxiliary component (520) are respectively positioned on the rear portion and the front portion of the fixing frame (100); the first backrest auxiliary assembly (510) comprises a sliding rail (511) for facilitating the inclination and return of the backrest assembly (400) and a pulley (512) arranged in the sliding rail (511), and the second backrest auxiliary assembly (520) comprises an auxiliary connecting piece A (521), an auxiliary connecting piece B (522) and an auxiliary connecting piece C (523) which are hinged with each other for facilitating the inclination and return of the backrest assembly (400).

2. The backrest recline mechanism of a seat functional rack as claimed in claim 1, wherein: the sliding rail (511) is fixedly arranged at the rear part of the inner side of the fixed frame (100), the pulley (512) is rotatably connected at the rear part of the lower cushion support (320), and the pulley (512) is arranged in the sliding rail (511) and can slide along the sliding rail (511).

3. The backrest recline mechanism of a seat functional rack as claimed in claim 2, wherein: the front track of the sliding rail (511) is an arc line (5111), the rest part of the track of the sliding rail (511) is a straight line (5112) or an arc line tending to a straight line, and the sliding rail (511) is integrally inclined with a high front part and a high rear part.

4. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the included angle range of the straight line (5112) part or the arc line tending to the straight line of the slide rail (511) and the horizontal plane is 11-18 degrees.

5. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the arc radius of the arc line (5111) at the front part of the sliding rail (511) is 40-150 mm.

6. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the length ratio of the arc length of the arc line (5111) part at the front part of the slide rail (511) to the length of the straight line (5112) part or the arc line part tending to the straight line is 1/6-1/2.

7. The backrest recline mechanism of a seat functional rack as claimed in claim 2, wherein: and limiting devices (513) used for preventing the pulleys (512) from sliding out of the sliding rails (511) are arranged at two ends of the sliding rails (511).

8. The backrest recline mechanism of a seat functional rack as claimed in claim 1, wherein: the auxiliary connecting piece B (522) is of a crank structure with a bent part A (5221) and a forward opening; one ends of the auxiliary connecting piece A (521) and the auxiliary connecting piece C (523) are hinged with the inner side of the same-side fixing frame (100), the other ends of the auxiliary connecting piece A (521) and the auxiliary connecting piece C (523) are respectively hinged with the upper end of the auxiliary connecting piece B (522) and a bending part A (5221) of the auxiliary connecting piece B, and the other end of the auxiliary connecting piece B (522) is hinged with the front part of the lower cushion support piece (320); the hinge point of the auxiliary connecting piece A (5221) and the fixed frame (100) is positioned behind the hinge point of the auxiliary connecting piece C (523) and the fixed frame (100), and the hinge point of the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) is positioned above the hinge point of the auxiliary connecting piece C (523) and the fixed frame (100).

9. The backrest recline mechanism of a seat functional rack as claimed in claim 8, wherein: when the backrest assembly (400) is completely tilted and falls down, a connecting line between a hinge point between the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) and a hinge point between the auxiliary connecting piece C (523) and the auxiliary connecting piece B (522) is a connecting line A (524), a connecting line between a hinge point between the auxiliary connecting piece C (523) and the auxiliary connecting piece B (522) and a connecting line between a hinge point between the auxiliary connecting piece C (523) and the fixing frame (100) is a connecting line B (525), and an included angle between the connecting line A (524) and the connecting line B (525) is less than 5 degrees; the connecting line of the hinge point between the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) and the hinge point between the auxiliary connecting piece C (523) and the fixed frame (100) is a connecting line C (526), and the included angle between the connecting line C (526) and the vertical perpendicular line (527) is less than 10 degrees.

10. The backrest recline mechanism of a seat functional rack as claimed in claim 9, wherein: the backrest assembly (400) comprises a backrest connecting piece A (410), a backrest connecting piece B (420), a backrest connecting piece C (430), a backrest connecting piece D (440) and a backrest connecting piece E (450), wherein the backrest connecting piece C (430) is of a crank structure with a bent part B (431) and a forward opening, and the backrest connecting piece D (440) is an extending part which is inclined upwards at the rear part of the upper cushion support (310); two ends of the backrest connecting piece A (410) are respectively hinged with one end of the backrest connecting piece B (420) and the front part of the backrest connecting piece D (440); one end of the backrest connecting piece C (430) is hinged with the middle part of the backrest connecting piece B (420), the other end of the backrest connecting piece C is hinged with one end of the backrest connecting piece E (450), the bending part B (431) of the backrest connecting piece C is hinged with the tail end of the backrest connecting piece D (440), the other end of the backrest connecting piece E (450) is hinged with the same-side fixing frame (100), and the backrest connecting piece A (410), the backrest connecting piece B (420), the backrest connecting piece C (430) and the backrest connecting piece D (440) form a four-bar linkage mechanism.

11. The backrest recline mechanism of a seat frame as claimed in claim 10, wherein: the distance between two hinge points formed by hinging the backrest connecting piece A (410) and the backrest connecting piece C (430) with the backrest connecting piece B (420) is 45-60 mm.

12. The backrest recline mechanism of a seat frame as claimed in claim 10, wherein: a limit shaft A (411) is arranged on the backrest connecting piece A (410), and the end hinged with the backrest connecting piece A (410) on the backrest connecting piece B (420) extends to form a limit rod (421); when the backrest assembly (400) is in an initial state or only the leg rest plate assembly (200) is extended, the limiting rod (421) is abutted against the limiting shaft A (411); when the backrest assembly (400) is completely tilted and falls down, the backrest connecting piece B (420) is propped against the limiting shaft A (411).

Technical Field

The invention relates to the technical field of furniture, in particular to a backrest inclining mechanism of a functional frame of a seat.

Background

The problems of unsmooth operation, difficult recovery and the like always exist in the processes of inclining, falling down and recovering of the backrest component in the traditional seat functional frame, and the problems are relatively common, and particularly, the problems are more prominent for a low functional frame, a non-electric functional frame and the like.

For the increasingly strong market demands, the problem is urgently solved, and a mechanism which can enable the functional rack to be smooth and labor-saving in the process of tilting, falling and returning and the backrest assembly on the functional racks such as a low functional rack and a non-electric functional rack besides the traditional functional rack is needed.

As shown in fig. 1 and 2, a functional frame of a conventional seat generally includes a fixed frame 100, a leg rest assembly 200, a seat cushion support assembly 300 and a backrest assembly 400, which are disposed in pairs at left and right sides of the fixed frame 100, wherein front and rear ends of the seat cushion support assembly 300 are respectively hinged to one ends of the leg rest assembly 200 and the backrest assembly 400, and the seat cushion support assembly 300 includes an upper seat cushion support 310, a lower seat cushion support 320, a front seat cushion support 330 and a rear seat cushion support 340, which form a four-bar linkage mechanism.

In order to overcome the defects in the prior art, the invention provides the backrest inclining mechanism of the functional frame of the seat, which is suitable for the backrest components on different functional frames to smoothly and labor-saving operate in the inclining, inclining and returning processes, is convenient for the backrest components to incline, incline and return and also takes into account the change of the height of the backrest.

Disclosure of Invention

The invention overcomes the defects in the prior art and provides the backrest inclining mechanism of the functional frame of the seat, which is suitable for the backrest components on different functional frames to run smoothly and laborsaving in the inclining, inclining and returning processes, is convenient for the backrest components to incline, incline and return and also considers the change of the height of the backrest.

The invention is realized by the following steps:

a backrest inclining mechanism of a seat functional frame comprises a first backrest auxiliary component and a second backrest auxiliary component which are arranged on the left side and the right side of a fixed frame and are arranged in a bilateral symmetry mode, wherein the first backrest auxiliary component and the second backrest auxiliary component are respectively positioned on the rear portion and the front portion of the fixed frame; the first backrest auxiliary assembly comprises a sliding rail and a pulley, the sliding rail is convenient for the backrest assembly to incline and return, the pulley is arranged in the sliding rail, and the second backrest auxiliary assembly comprises an auxiliary connecting piece A, an auxiliary connecting piece B and an auxiliary connecting piece C which are convenient for the backrest assembly to incline and return and are hinged with each other.

The first backrest auxiliary assembly and the second backrest auxiliary assembly are convenient for the backrest assembly to incline and return, so that the backrest assembly can incline and return smoothly and labor-saving; for a low functional rack, because the height is reduced, unsmooth and labor-consuming recovery of a backrest and the like are often caused, so that auxiliary components are needed to help the operation, and for a non-electric functional rack, the auxiliary components can help the operation to be smooth and the tilting recovery to save labor; in addition, in order to enable the backrest assembly to better achieve the effects of smooth operation and labor saving in tilting and returning, the first backrest auxiliary assembly and the second backrest auxiliary assembly are respectively arranged at the front part and the rear part of the fixing frame, and force which is beneficial to tilting and returning of the backrest assembly is generated for the front part and the rear part.

Preferably, the slide rail is fixedly arranged at the rear part of the inner side of the fixed frame, the pulley is rotatably connected at the rear part of the lower cushion support piece, and the pulley is arranged in the slide rail and can slide along the slide rail.

Since the back assembly is generally disposed at the rear of the fixed leg, disposing the first back auxiliary assembly at the rear facilitates the reclining and restoring of the back assembly.

Preferably, the front track of the slide rail is an arc line, the rest tracks of the slide rail are straight lines or arc lines tending to be straight lines, and the slide rail is integrally inclined with a high front part and a high rear part.

The invention designs the composite guide rail of the rear linear part or the arc part which tends to be linear and the front arc part, when the backrest component tilts up and falls down, the height change of the pulley of the linear part or the arc part which tends to be linear is gentle in the initial stage, the resistance of the backrest component for tilting up and falling down is reduced, the backrest component is convenient to tilt up, the arc part accelerates the lifting height of the pulley, the gravity restoring force is increased, the smooth resetting of the backrest component is ensured, and therefore, the smoothness and labor saving of the tilting up and restoring of the backrest component are realized. To the reduction of function frame height, length extension after, the size of various connecting rods receives the restriction, the back subassembly is inclining the in-process of falling down, the height that the seat lifted reduces, can lead to the seat gravity restoring force not enough more easily, consequently, design rear portion straight line portion or tend to sharp pitch arc part, the compound guide rail of anterior pitch arc part, it is smooth and easy, laborsaving also very to be favorable to the back subassembly to incline to face upward and reply, to non-electric function frame, the same smooth and easy nature through the pulley slide rail brings smoothly, laborsaving effect for inclining and replying of back subassembly.

Preferably, the included angle between the straight line part or the arc line tending to the straight line of the slide rail and the horizontal plane is in the range of 11-18 degrees.

The design of the angle is directly related to the inclination degree of the straight line part or the arc line part which tends to be straight, the resistance of the backrest assembly to incline and incline can be reduced for the low functional frame, and the inclination of the backrest assembly can be facilitated, so that the smooth and labor-saving effects can be brought to the inclination and the return of the backrest assembly.

Preferably, the arc radius of the arc part at the front part of the slide rail is 40 mm-150 mm.

The design that the radius of the circular arc is 40 mm-150 mm directly relates to the degree of accelerating the lifting height of the pulley, and for a low functional frame, the gravity restoring force can be increased, the weightlessness possibly brought by tilting can be overcome, the smooth resetting of the backrest assembly is ensured, and therefore the smooth and labor-saving tilting and restoring of the backrest assembly are realized.

Preferably, the arc length of the arc part of the front part of the slide rail and the length ratio of the straight line part or the arc part which tends to be straight line of the rest part are 1/6-1/2.

The arrangement of the proportion realizes the effects of tilting and returning smoothly and labor-saving simultaneously.

Preferably, two ends of the sliding rail are provided with limiting devices for preventing the pulley from sliding out of the sliding rail.

The limiting device is used for preventing the pulley from sliding out of the sliding rail.

Preferably, the auxiliary connecting piece B is a crank structure which is provided with a bent part A and is provided with a forward opening; one ends of the auxiliary connecting piece A and the auxiliary connecting piece C are hinged with the inner side of the fixing frame on the same side, the other ends of the auxiliary connecting piece A and the auxiliary connecting piece C are respectively hinged with the upper end of the auxiliary connecting piece B and the bending part A of the auxiliary connecting piece B, and the other end of the auxiliary connecting piece B is hinged with the front part of the lower cushion supporting piece; the hinge point of the auxiliary connecting piece A and the fixing frame is located behind the hinge point of the auxiliary connecting piece C and the fixing frame, and the hinge point of the auxiliary connecting piece A and the auxiliary connecting piece B is located above the hinge point of the auxiliary connecting piece C and the fixing frame.

After the backrest component tilts up and falls down, the gravity center of a human body changes, most of the gravity is distributed at the front ends of the backrest and the seat surface, and accordingly the restoring force is insufficient.

Preferably, when the backrest assembly is completely tilted and falls down, a connecting line between a hinge point between the auxiliary connecting piece A and the auxiliary connecting piece B and a hinge point between the auxiliary connecting piece C and the auxiliary connecting piece B is a connecting line A, a connecting line between a hinge point between the auxiliary connecting piece C and the auxiliary connecting piece B and a hinge point between the auxiliary connecting piece C and the fixing frame is a connecting line B, and an included angle between the connecting line A and the connecting line B is less than 5 degrees; the connecting line of the hinge point between the auxiliary connecting piece A and the auxiliary connecting piece B and the hinge point between the auxiliary connecting piece C and the fixing frame is a connecting line C, and the included angle between the connecting line C and the vertical line is less than 10 degrees.

After the backrest component tilts up and falls down, the gravity center of a human body changes, and most of the gravity is distributed at the front ends of the backrest and the seat surface, so that the restoring force is insufficient; the data with the included angle of less than 5 degrees and less than 10 degrees are adopted, so that the generated restoring force is larger; meanwhile, the driving mechanism moves forwards, so that zero leaning against the wall of the seat is realized; all included angles described herein are acute included angles.

Preferably, the backrest assembly comprises a backrest connecting piece A, a backrest connecting piece B, a backrest connecting piece C, a backrest connecting piece D and a backrest connecting piece E, wherein the backrest connecting piece C is of a crank structure with a bent part B and a forward opening, and the backrest connecting piece D is an extending part which is inclined upwards and arranged at the rear part of the upper cushion support; two ends of the backrest connecting piece A are respectively hinged with one end of the backrest connecting piece B and the front part of the backrest connecting piece D; one end of the backrest connecting piece C is hinged with the middle part of the backrest connecting piece B, the other end of the backrest connecting piece C is hinged with one end of the backrest connecting piece E, the bending part B of the backrest connecting piece C is hinged with the tail end of the backrest connecting piece D, the other end of the backrest connecting piece E is hinged with the same-side fixing frame, and the backrest connecting piece A, the backrest connecting piece B, the backrest connecting piece C and the backrest connecting piece D form a four-link mechanism.

The backrest connecting piece E plays a role in supporting the four-bar linkage, supports the four-bar linkage which is inclined and falls down when the leg rest board assembly extends, plays a role in buffering, and pulls the four-bar linkage to prevent the four-bar linkage from falling down.

Preferably, the distance between two hinge points formed by hinging the backrest connecting piece A and the backrest connecting piece C with the backrest connecting piece B is 45-60 mm.

Because the height of the functional frame is reduced, the gravity center of a human body moves upwards, the force for falling down by tilting is insufficient, the stability is poor, the distance between the functional frame and the backrest is set to be moderate 45-60 mm, the backrest is more easily tilted down and the stability when falling down is improved, and the defects of labor wasting when tilting down due to too long distance and poor stability due to too short distance are avoided.

Preferably, a limit shaft A is arranged on the backrest connecting piece A, and the end, hinged with the backrest connecting piece A, of the backrest connecting piece B extends to form a limit rod; when the backrest component is in an initial state or only the leg rest plate component extends, the limiting rod is abutted against the limiting shaft A; when the backrest assembly 400 is completely tilted and falls down, the backrest connecting piece B is propped against the limiting shaft A.

This may improve the structural stability of the back assembly in either the unfolded or undeployed state.

The invention adopts the technical scheme, which has the beneficial effects that:

the invention provides a backrest inclining mechanism of a functional frame of a seat, which is suitable for the backrest components on different functional frames to run smoothly and laborsaving in the inclining, falling and returning processes, is convenient for the inclination, the inclination and the return of the backrest components and gives consideration to the change of the height of the backrest. The invention designs the composite guide rail of the rear linear part or the arc part which tends to be linear and the front arc part, when the backrest component tilts up and falls down, the height change of the pulley of the linear part or the arc part which tends to be linear is gentle in the initial stage, the resistance of the backrest component for tilting up and falling down is reduced, the backrest component is convenient to tilt up, the arc part accelerates the lifting height of the pulley, the gravity restoring force is increased, the smooth resetting of the backrest component is ensured, and therefore, the smoothness and labor saving of the tilting up and restoring of the backrest component are realized. Function frame height reduction, length extension after, the size of various connecting rods receives the restriction, the back subassembly is inclining the in-process of falling down, the height that the seat lifted reduces, can lead to seat gravity restoring force not enough more easily, consequently, design rear portion straight line portion or tend to sharp pitch arc part, the compound guide rail of anterior pitch arc part, it is smooth and easy that also very be favorable to the back subassembly to incline to face and reply, laborsaving, to non-electric function frame, the smooth and easy nature of the same through the pulley slide rail brings smoothly, laborsaving effect for inclining and replying of back subassembly.

Drawings

FIG. 1 is a schematic view of the overall structure of the fixing frame and the internal components of the present embodiment;

FIG. 2 is a schematic structural view of a portion of the fixing frame and the internal components of the present embodiment;

FIG. 3 is a schematic structural view of another portion of the fixing frame and the internal components of the present embodiment;

FIG. 4 is a schematic side view of the structure of FIG. 2;

FIG. 5 is a side elevational view of the backrest module of FIG. 2 fully reclined;

fig. 6 is an enlarged schematic view of a portion a in fig. 5.

Detailed Description

The specific embodiment of the invention is as follows:

in the present embodiment, the directional words such as "front", "rear", "left", "right", etc. are described in terms of the user's view after sitting on the seat, for example, the front of the user is "front"; for better understanding of the present embodiment, the related connecting lines a, B, and C are virtual lines.