CN219845851U - Chair backrest linkage adjusting mechanism and chair - Google Patents

Abstract

The utility model discloses a seat backrest linkage adjusting mechanism and a seat, wherein the seat backrest linkage adjusting mechanism comprises a parallel connecting rod mechanism and a linkage piece, the parallel connecting rod mechanism comprises a first parallel connecting rod mechanism and a second parallel connecting rod mechanism which are connected with each other, a first end of the first parallel connecting rod mechanism is connected with a backrest, a second end of the first parallel connecting rod mechanism is connected with a first end of the second parallel connecting rod mechanism, a second end of the second parallel connecting rod mechanism is connected with a seat cushion, two ends of the linkage piece are respectively connected with the first parallel connecting rod mechanism and the second parallel connecting rod mechanism in a pivotable manner, and the linkage piece can push the first parallel connecting rod mechanism to rotate relative to the second parallel connecting rod mechanism in a telescopic manner. The seat backrest linkage adjusting mechanism provided by the utility model has the advantages of simplicity in operation, convenience in adjustment and good back-following effect.

Description

Chair backrest linkage adjusting mechanism and chair

Technical Field

The utility model relates to the technical field of seats, in particular to a seat backrest linkage adjusting mechanism and a seat.

Background

In the study chair product, the chair has the functions of height, chair back depth and chair back height adjustment. The current study chairs generally have the following problems: on the one hand, the seat is adjusted in a mode of adjusting the bolt and controlling the air pressure rod, and the scheme generally needs to be adjusted for at least more than twice and three times, so that the seat is complicated and inconvenient to operate in the use process. On the other hand, the height of the study chair, the depth of the chair back and the travel of the height of the chair back in the prior art do not meet the use requirement of children, the effect of supporting the back of a human body cannot be achieved, and the study chair is easy to disperse the attention of the children.

How to solve and improve the problems of complicated sitting depth adjustment and poor back-following effect commonly existing in the prior study chair, the back-following effect of the chair is more remarkable, the operation is more convenient, and the chair is a technical problem to be solved urgently.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides a seat back linkage adjusting mechanism, which has the advantages of simple operation, convenient adjustment and good back-following effect.

According to the seat back linkage adjusting mechanism disclosed by the embodiment of the utility model, the seat back linkage adjusting mechanism comprises a parallel connecting rod mechanism and a linkage piece, wherein the parallel connecting rod mechanism comprises a first parallel connecting rod mechanism and a second parallel connecting rod mechanism which are connected with each other, the first end of the first parallel connecting rod mechanism is connected with a backrest, the second end of the first parallel connecting rod mechanism is connected with the first end of the second parallel connecting rod mechanism, the second end of the second parallel connecting rod mechanism is connected with a cushion, the two ends of the linkage piece are respectively connected with the first parallel connecting rod mechanism and the second parallel connecting rod mechanism in a pivotable manner, and the linkage piece can push the first parallel connecting rod mechanism to rotate relative to the second parallel connecting rod mechanism in a telescopic manner.

The seat backrest linkage adjusting mechanism provided by the embodiment of the utility model has the advantages of simplicity in operation, convenience in adjustment and good back-following effect.

In some embodiments, the first parallel linkage includes a first link having a protrusion through which the first link is pivotably coupled to the linkage, the second end of the first link and the second end of the second link being coupled by a first link, the first link being coupled to the backrest.

In some embodiments, the protrusion is provided with an adjusting hole, and the adjusting hole is rotatably connected with the first end of the linkage member through a rotating shaft.

In some embodiments, the second parallel linkage includes a cushion lift and a cushion carrier, the cushion lift and the cushion carrier are pivotably coupled, the cushion carrier and the cushion are coupled, and the first end of the first link and the first end of the second link are pivotably coupled with the cushion lift.

In some embodiments, the cushion lifter includes a third link and a lifter, a first end top of the third link is connected to the first link and the second link, a first end bottom of the third link is connected to the first end of the lifter, and a second end of the third link is pivotally connected to the cushion carrier.

In some embodiments, the third connecting rod has a straight section, an inclined section and a connecting section, the inclined section connects the straight section and the connecting end, the connecting section is provided with a guiding groove and a connecting rod positioning hole, the protruding part moves in the guiding groove relative to the connecting section through the end of the rotating shaft, and the first connecting rod and the second connecting rod are respectively connected with the connecting section in a rotating way through a pivot passing through the connecting rod positioning hole.

In some embodiments, the cushion carrier has a straight section, an inclined section, and a connecting section, an included angle between the straight section and the inclined section of the cushion carrier is a first included angle, an included angle between the straight section and the inclined section of the third link is a second included angle, and the first included angle is smaller than the second included angle.

In some embodiments, the guide groove extends in the same direction as the axial direction of the inclined section, and the straight section is parallel to the axial direction of the connecting section.

In some embodiments, the straight section is provided with an avoidance groove and a connecting rod positioning hole, the linkage member passes through the avoidance groove and is connected with the first connecting rod, and the cushion bearing member is rotatably connected with the straight section through a pivot passing through the connecting rod positioning hole.

According to the seat provided by the embodiment of the utility model, the seat comprises a cushion, a backrest, a lifting screw rod and a linkage adjusting mechanism.

Compared with the related art, the utility model has the following advantages:

according to the utility model, the backrest and the seat cushion are coordinated and adjusted through the two parallel link mechanisms, so that the problem that the sitting height and the backrest depth of the seat are not matched is solved, the adjusting steps are few, the operation is convenient, the adjusting steps can be simplified through adjusting the backrest position by the link members, the backrest-following effect of the seat is more obvious, the operation is more convenient, the learning attention of children is improved, and the learning efficiency of children is promoted. The number of parts is reduced by designing the connecting rod mechanism, and the installation steps are simplified. The bending angle design of the connecting rod forms fine adjustment on the height of the seat, and is more suitable for the use requirements of low-age children.

Drawings

Fig. 1 is a schematic view of a seat according to an embodiment of the present utility model.

Fig. 2 is a side view of a seat in an embodiment according to the utility model.

Fig. 3 is a schematic cross-sectional view of fig. 2.

Fig. 4 is a schematic view of a structure of a seat back linkage adjustment mechanism in a position where a seat cushion and a back are at a maximum distance in accordance with an embodiment of the present utility model.

Fig. 5 is a schematic structural view of a cushion lifter of a seatback linkage adjusting mechanism according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a third link of the seatback linkage adjusting mechanism in the embodiment of the present utility model.

Fig. 7 is a schematic view of a structure of a first link of a seatback linkage adjusting mechanism in accordance with an embodiment of the present utility model.

Fig. 8 is a schematic structural view of a second link of the seatback linkage adjusting mechanism in the embodiment of the present utility model.

Reference numerals: 100. a first link; 101. a protruding portion; 102. an adjustment aperture; 200. a second link; 300. a first connector; 400. a cushion lifting member; 401. a third link; 402. a lifting seat; 403. a guide groove; 404. a connecting rod positioning hole; 405. an avoidance groove; 406. a rotating shaft; 500. a cushion carrier; 600. a linkage member; 700. a cushion; 800. a backrest; 900. lifting the screw rod.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

According to the seat back linkage adjustment mechanism of the embodiment of the utility model, as shown in fig. 1 to 8, the seat back linkage adjustment mechanism comprises a parallel link mechanism and a linkage piece 600, the parallel link mechanism comprises a first parallel link mechanism and a second parallel link mechanism which are connected with each other, a first end of the first parallel link mechanism is connected with a backrest 800, a second end of the first parallel link mechanism is connected with a first end of the second parallel link mechanism, a second end of the second parallel link mechanism is connected with a seat cushion 700, two ends of the linkage piece 600 are respectively connected with the first parallel link mechanism and the second parallel link mechanism in a pivotable manner, and the linkage piece 600 telescopically pushes the first parallel link mechanism to rotate relative to the second parallel link mechanism. The utility model adopts the principle of parallel four-bar linkage, the first parallel bar linkage and the second parallel bar linkage are connected together, the first end of the first parallel bar linkage is connected with the backrest 800, the angle change of the first parallel bar linkage relative to the second parallel bar linkage drives the backrest 800 to move in the horizontal direction, the second parallel bar linkage is connected with the cushion 700, the cushion 700 rises and falls to drive the linkage 600 connected with the second parallel bar linkage to move along, the linkage 600 extends or shortens to increase or reduce the angle of the first parallel bar linkage relative to the second parallel bar linkage, the backrest 800 is driven by the linkage 600 to move in the horizontal direction to realize the back following effect when the cushion 700 moves in the height direction, and the seat backrest 800 can be tightly attached to the backrest of a user.

The seat backrest linkage adjusting mechanism provided by the embodiment of the utility model has the advantages of simplicity in operation, convenience in adjustment and good back-following effect. The utility model realizes the linkage adjustment of the backrest 800 and the seat cushion by matching the two parallel link mechanisms, solves the problem that the sitting height of the seat is not matched with the depth of the backrest 800, has few adjustment steps and convenient operation, and can simplify the installation step by adjusting the position of the backrest 800 through the linkage piece 600.

In some embodiments, as shown in fig. 1 and 3, the first parallel link mechanism includes a first link 100 and a second link 200, the first link 100 having a protrusion 101, the first link 100 being pivotably connected to the link 600 by the protrusion 101, the second end of the first link 100 and the second end of the second link 200 being connected by a first connector 300, the first connector 300 being connected to the backrest 800.

Specifically, the protrusion 101 of the first link 100 may be disposed at or adjacent to the first end of the first link 100, the protrusion 101 may be spaced apart from the body of the first link 100 by a distance, the first link 100 may be two, the two first links 100 may be connected by a rectangular plate, the second link 200 may be two, the two second links 200 may be connected by a rectangular plate, the protrusion 101 of the first link 100 may be rotatably connected to the link 600, the first ends of the first link 100 and the second link 200 may be rotatably connected to the second parallel link mechanism, the second ends of the first link 100 and the second link 200 may be rotatably connected to the first link 300, the first link 300 may extend in a horizontal direction by a distance greater than the distance between the first link 100 and the second link 200, and the first link 300 may be connected to the backrest 800 such that the backrest 800 may move following the second ends of the first link 100 and the second link 200.

In some embodiments, as shown in fig. 7, the protrusion 101 is provided with an adjusting hole 102, and the adjusting hole 102 is rotatably connected to the first end of the linkage 600 through a rotation shaft 406.

Specifically, the rotation shaft 406 passes through the adjustment hole 102 and the first end of the linkage member 600, at this time, the linkage member 600 is pivotally connected to the first link 100 with the rotation shaft 406 as a pivot, and the linkage member 600 stretches and contracts to push the rotation shaft 406 to push the first link 100 to swing with the first end of the first link 100 as an axis, and the first link 100 drives the backrest 800 and the second link 200 to move through the first link 300.

In some embodiments, as shown in fig. 5 and 6, the second parallel linkage includes a cushion lifter 400 and a cushion carrier 500, the cushion lifter 400 is pivotally coupled to the cushion carrier 500, the cushion carrier 500 is coupled to the cushion 700, and the first ends of the first and second links 100, 200 are pivotally coupled to the cushion lifter 400.

Specifically, the bottom of the cushion lifter 400 is fixedly connected with the lifter screw 900, the other end of the lifter screw 900 is connected with the seat, the cushion lifter 400 adjusts the seat height through the lifter screw 900, the cushion carrier 500 has a plane for fixing with the cushion 700, the cushion 700 can be fixed on the plane of the cushion carrier 500 through bolts, the first end of the cushion lifter 400 is rotatably connected with the first link 100 and the second link 200, the second end of the cushion lifter 400 is rotatably connected with the second end of the cushion carrier 500, the first end of the cushion carrier 500 is rotatably connected with the protrusion 101 of the first link 100 through the rotation shaft 406, and when the first link 100 swings, the first end of the cushion carrier 500 moves with the first link 100.

In some embodiments, as shown in fig. 1 and 5, the cushion lifter 400 includes a third link 401 and a lifter base 402, a first end top of the third link 401 is connected to the first link 100 and the second link 200, a first end bottom of the third link 401 is connected to the lifter base 402, and a second end of the third link 401 is pivotally connected to the cushion carrier 500.

In some embodiments, as shown in fig. 5, the third link 401 has a straight section, an inclined section and a connecting section, the inclined section connects the straight section and the connecting end, a guide groove 403 and a link positioning hole 404 are provided on the connecting section, the protrusion 101 moves relative to the connecting section within the guide groove 403 through an end of the rotation shaft 406, and the first link 100 and the second link 200 are rotatably connected to the connecting section through pivots passing through the link positioning hole 404, respectively.

In some embodiments, as shown in fig. 6, the cushion carrier 500 has a straight section, an inclined section, and a connecting section, where an angle between the straight section and the inclined section is a first angle, and an angle between the straight section and the inclined section of the third link 401 is a second angle, and the first angle is smaller than the second angle.

Specifically, the different bending angles of the cushion carrier 500 and the cushion lifter 400 enable the seat height to be slightly varied when the depth of the backrest 800 is adjusted, so that the fine adjustment of the seat height can be realized, and the seat is more suitable for the use of the young children. The first included angle is 50 degrees, the second included angle can be 53 degrees, and the fine tuning range of the height of the chair is about 2 cm.

In some embodiments, the guide slot 403 extends in the same direction as the axial direction of the angled section, with the straight section being parallel to the axial direction of the connecting section.

Specifically, the extending direction of the guide groove 403 is the same as the inclination angle of the inclined section, so that the seat cushion 700 carrier 500 is driven by the rotating shaft 406 to move along the guide groove 403, and the guide groove 403 is disposed on the surface of the third link 401. The straight section and the connecting section are parallel to each other, and the straight section ensures that the seat cushion 700 is stably placed.

In some embodiments, as shown in fig. 5 and 6, the flat section is provided with a dodging groove 405 and a link positioning hole 404, and the link 600 is connected to the first link 100 through the dodging groove 405, and the cushion carrier 500 is rotatably connected to the flat section through a pivot shaft passing through the link positioning hole 404.

Specifically, the linkage 600 is a controllable gas spring or an electric push rod. The straight section is provided with the avoiding groove 405, so that the movement space of the linkage member 600 can be provided, the cushion bearing member 500 is prevented from being collided with the linkage member 600 to be damaged when moving, and the straight section of the third connecting rod 401 is provided with the avoiding groove 405, so that the position of the linkage member 600 is conveniently adjusted, and the maintenance and the replacement of the linkage member 600 are facilitated. The link positioning hole 404 cooperates with the pivot shaft to rotatably connect the cushion carrier 500 and the third link 401. The gas springs of the linkage 600 may be installed at both sides, and there may be a plurality of gas springs.

The seat according to the embodiment of the present utility model, as shown in fig. 1 to 3, includes a seat cushion 700, a backrest 800, a lift screw 900, and a linkage adjustment mechanism. The seat cushion 700 drives the backrest 800 to adjust the depth of the backrest 800 through the linkage adjusting mechanism, the seat is adjusted to be high through the lifting screw rod 900, the travel of the seat height can be 15cm, and the lowest seat height is 28cm, so that the needs of the low-age children are met. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A seatback linkage adjustment mechanism, comprising:

the parallel link mechanism comprises a first parallel link mechanism and a second parallel link mechanism which are connected with each other, a first end of the first parallel link mechanism is connected with the backrest, the second end of the first parallel link mechanism is connected with the first end of the second parallel link mechanism, and the second end of the second parallel link mechanism is connected with the seat cushion;

and the two ends of the linkage piece are respectively and pivotally connected with the first parallel link mechanism and the second parallel link mechanism, and the linkage piece can telescopically push the first parallel link mechanism to rotate relative to the second parallel link mechanism.

2. The seat back linkage adjustment mechanism of claim 1, wherein the first parallel link mechanism comprises a first link and a second link, the first link having a protrusion through which the first link is pivotally connected to the linkage, the second end of the first link and the second end of the second link being connected by a first connector, the first connector being connected to the back.

3. The seat back linkage adjustment mechanism of claim 2, wherein the projection is provided with an adjustment aperture, the adjustment aperture being rotatably coupled to the first end of the linkage member via a rotational axis.

4. A seat back linkage adjustment mechanism according to claim 3 wherein the second parallel linkage includes a seat cushion lift and a seat cushion carrier, the seat cushion lift being pivotally connected to the seat cushion carrier, the seat cushion carrier being connected to the seat cushion, the first ends of the first and second links being pivotally connected to the seat cushion lift.

5. The seat back linkage adjustment mechanism of claim 4, wherein the cushion lifter comprises a third link and a lifter base, a first end top of the third link is connected to the first link and the second link, a first end bottom of the third link is connected to a first end of the lifter base, and a second end of the third link is pivotally connected to the cushion carrier.

6. The seatback linkage adjustment mechanism of claim 5, wherein the third link has a straight section, an inclined section and a connecting section, the inclined section connects the straight section and the connecting end, the connecting section is provided with a guide groove and a link positioning hole, the protruding portion moves in the guide groove relative to the connecting section through an end portion of the rotating shaft, and the first link and the second link are rotatably connected to the connecting section through pivots passing through the link positioning hole, respectively.

7. The seat back linkage adjustment mechanism of claim 6, wherein the seat cushion carrier has a straight section, an inclined section, and a connecting section, wherein an angle between the straight section and the inclined section of the seat cushion carrier is a first angle, an angle between the straight section and the inclined section of the third link is a second angle, and the first angle is smaller than the second angle.

8. The seat back linkage adjustment mechanism according to claim 6, wherein the guide groove extends in the same direction as the axial direction of the inclined section, and the straight section is parallel to the axial direction of the connecting section.

9. The seat back linkage adjustment mechanism of claim 6, wherein the straight section is provided with a relief slot and a link positioning hole, the linkage member passes through the relief slot and is connected to the first link, and the seat cushion carrier is rotatably connected to the straight section by a pivot passing through the link positioning hole.

10. A seat comprising a seat cushion, a backrest, a lifting screw and a linkage adjustment mechanism, wherein the linkage adjustment mechanism is a seat backrest linkage adjustment mechanism according to any one of claims 1 to 9.