CN220069252U

CN220069252U - Chair back tilting structure and chair

Info

Publication number: CN220069252U
Application number: CN202321415736.6U
Authority: CN
Inventors: 宋建文
Original assignee: Foshan Sitzone Furniture Co ltd
Current assignee: Guangdong Jingyi Furniture Co.,Ltd.
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-11-24
Anticipated expiration: 2033-06-05

Abstract

The utility model discloses a chair back tilting structure and a chair, wherein the chair back tilting structure comprises: the back frame is fixedly connected with a matching block; the transverse frame is arranged below the back frame, the transverse frame is provided with a special-shaped wall, the special-shaped wall is provided with an arc-shaped structure, and the matching block is arranged in a space formed by the special-shaped wall in a sliding manner and is abutted with the special-shaped wall so as to adjust the inclination angle of the back frame. Through the arc structure of dysmorphism wall, when cooperation piece and dysmorphism wall relative slip, the back of the body frame is adjusted along with the rotation of cooperation piece and is inclined the angle of face upward, and connection structure is simple compact, and then, when sitting person sits, the back of the body frame can realize the self-adaptation according to sitting person's position of sitting and incline upward.

Description

Chair back tilting structure and chair

Technical Field

The utility model relates to the technical field of seats, in particular to a chair back tilting structure and a seat with the chair back tilting structure.

Background

The chair is one of the most commonly used tools, and in the chair with the chair back tilting function, the chair back is fixedly arranged on the chair seat, and the chair back tilting function is realized by means of the elastic deformation of the chair back. In the related art, the chair back is rotationally connected with the chair seat through the rotating shaft, and a locking structure is required to be additionally arranged, so that the chair seat is required to be unlocked before adjustment, and is locked after the chair back is adjusted to a proper position, and the self-adaptability is poor. In some related technologies, the chair back and the seat plate are adjusted in a linkage way, and the seat plate moves horizontally along with the chair back when the chair back tilts, wherein a connecting piece is arranged between the chair back and the seat plate, two ends of the connecting piece are respectively hinged with the chair back and the seat plate, and a plane connecting rod mechanism is adopted between the seat plate and the chair seat to realize translation. However, the structure mode for realizing the self-adaptive backward tilting function of the chair back has more connecting pieces and more complex structure.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the chair back leaning structure, and the back frame of the chair back leaning structure can realize self-adaptive leaning according to the sitting posture of a sitting person, and the structure is simple and compact.

The utility model also provides a seat with the chair back tilting structure.

The chair back tilting structure according to the present utility model comprises:

the back frame is fixedly connected with a matching block;

the transverse frame is arranged below the back frame, the transverse frame is provided with a special-shaped wall, the special-shaped wall is provided with an arc-shaped structure, and the matching block is arranged in a space formed by the special-shaped wall in a sliding manner and is abutted to the special-shaped wall so as to adjust the tilting angle of the back frame.

The chair back tilting structure has at least the following beneficial effects: through the arc structure of dysmorphism wall, when cooperation piece and dysmorphism wall relative slip, the back of the body frame is adjusted along with the rotation of cooperation piece and is inclined the angle of face upward, and connection structure is simple compact, and then, when sitting person sits, the back of the body frame can realize the self-adaptation according to sitting person's position of sitting and incline upward.

According to the chair back tilting structure, the special-shaped wall is convexly arranged, the matching block is connected with the pressing piece, and the pressing piece is used for driving the matching block to press against the bottom wall of the special-shaped wall.

According to the chair back tilting structure, the matching block is provided with the first arc wall, the special-shaped wall comprises the second arc wall, and the first arc wall is in sliding connection with the second arc wall.

According to the chair back tilting structure, the transverse frame is provided with the first limiting wall and the second limiting wall which are oppositely arranged, the first limiting wall and the second limiting wall are obliquely arranged with the horizontal plane, and the matching block moves between the first limiting wall and the second limiting wall.

According to the chair back tilting structure, the elastic piece is connected between the back frame and the transverse frame, and two ends of the elastic piece are respectively connected with the back frame and the transverse frame.

According to the chair back tilting structure, two elastic pieces are arranged, and the two elastic pieces are respectively positioned at two sides of the matching block.

According to the chair back tilting structure, the elastic piece is an elastic cushion.

According to the chair back tilting structure, the transverse frame is provided with the mounting groove, and the elastic cushion is mounted in the mounting groove.

According to the chair back tilting structure, the transverse frame is provided with the fixing protrusions, and the fixing protrusions extend into the elastic cushion.

The chair comprises the chair back tilting structure.

The seat provided by the utility model has at least the following beneficial effects: the crossbearer is used as the bearing part of the seat, is provided with the special-shaped wall that is arc-shaped structure, and when cooperation piece and special-shaped wall relative slip, the back of the body frame is adjusted along with the rotation of cooperation piece and is inclined the angle, and connection structure is simple compact, and then, when sitting person sits, the back of the body frame can realize the self-adaptation according to sitting person's position of sitting and incline to face upward.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic cross-sectional view of a chair back tilt structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a first exploded view of a reclining chair back structure according to an embodiment of the present utility model;

fig. 3 is an enlarged view of a shown in fig. 1;

fig. 4 is an enlarged view of B shown in fig. 2;

FIG. 5 is a schematic view of a cross frame of a chair back leaning structure according to an embodiment of the present utility model;

fig. 6 is a second exploded view of the reclining chair back structure according to the embodiment of the present utility model.

Reference numerals illustrate:

a back frame 100; a plug arm 101; a screw sleeve 1011; a mating block 110; a first arc wall 111; a connection post 120; a pressing block 130;

a seat frame 200; a rotation space 201; a mating groove 202;

a cross frame 300; a mounting groove 301; a fixing projection 3011; a profiled wall 310; a second arc wall 311; a gear slot 312; a first limiting wall 320; a second limiting wall 330; a positioning wall 340;

an elastic cushion 400.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," 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 present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

For this purpose, as shown in fig. 1 to 3, the chair back tilting structure according to the present utility model includes a back frame 100, a seat frame 200 and a cross frame 300, wherein the seat frame 200 and the back frame 100 are mounted on the cross frame 300. Optionally, the seat frame is fixedly mounted on a cross frame (not shown in the figure), or the seat frame 200 is fixedly connected with the back frame 100, the back frame 100 is rotatably mounted on the cross frame 300, and when the seated user leans back against the back frame 100, the back frame 100 and the seat frame 200 rotate backwards together, so that a fixed angle is kept between the seat frame 200 and the back frame 100, and the sitting posture angle of the legs and the back of the seated user is met, which is beneficial for the seated user to keep a good sitting posture. Specifically, the back frame 100 is fixedly connected with the matching block 110, the cross frame 300 is arranged below the back frame 100, the cross frame 300 is provided with the special-shaped wall 310, the special-shaped wall 310 is provided with an arc-shaped structure, and the matching block 110 is slidably arranged in a space formed by the special-shaped wall 310 and is abutted with the special-shaped wall 310 so as to adjust the tilting angle of the back frame 100. It is easy to understand that, through the arc structure of the profiled wall 310, when the matching block 110 and the profiled wall 310 slide relatively, the back frame 100 adjusts the tilting angle along with the rotation of the matching block 110, and the connection structure is simple and compact, and furthermore, when a sitting person sits, the back frame 100 can realize self-adaptive tilting according to the sitting posture of the sitting person.

In some embodiments of the present utility model, as shown in fig. 3, the profiled wall 310 is convexly disposed, and the matching block 110 is connected with a pressing member (not shown in the drawings) for pressing the matching block 110 against the bottom wall of the profiled wall 310, so that the matching block 110 can be hidden in a space formed by the profiled wall 310, and the user is prevented from being injured due to direct touching. Moreover, when the pressing member has elasticity and the back frame 100 and the seat frame 200 are fixed, if the pressing member is a compression spring, the matching block 110 has an offset along the length direction of the compression spring, and further, the back frame 100 and the seat frame 200 can be driven to move together. Therefore, the sitting moment can be buffered when the seated person sits on the seat frame 200, and the recline adjustment is easier and more comfortable. In some embodiments, the profiled wall is recessed and the mating block is held in abutment with the upper wall of the profiled wall (not shown).

As shown in fig. 2 to 5, the fitting block 110 is provided with a first arc wall 111, and the profiled wall 310 includes a second arc wall 311, and the first arc wall 111 is slidably connected with the second arc wall 311. Further, the contact area of the first arc wall 111 and the second arc wall 311 is larger, and the fitting block 110 is smoother when rotated by pressing against the second arc wall 311, thereby improving the sitting comfort of the seated user. In some embodiments, the mating block is provided with a plane, two ends of the plane are respectively abutted against the second arc wall, and a function (not shown in the figure) that the mating block rotates relative to the second arc wall can also be realized.

Further, the profiled wall 310 is provided with a plurality of gear slots 312, the plurality of gear slots 312 are arranged on the sliding path of the matching block 110 at intervals, the matching block 110 is provided with gear bars (not shown in the figure), and the gear bars and the plurality of gear slots 312 are sequentially embedded and matched, so that a plurality of backward tilting angles of the back frame 100 can be provided for a sitting person to select. For example, when the gearshift lever needs to change the recline angle, the seated user presses the back frame 100 with a large pressure to disengage the gearshift lever from the current gearshift slot 312, or when a compression spring is connected between the fitting block 110 and the cross frame 300, the seated user presses down along the length direction of the compression spring to drive the compression spring to shorten and disengage the gearshift lever from the current gearshift slot 312.

In some embodiments of the present utility model, as shown in fig. 2, 3 and 6, the cross frame 300 is provided with a first limiting wall 320 and a second limiting wall 330 which are oppositely arranged, the first limiting wall 320 and the second limiting wall 330 are obliquely arranged with respect to a horizontal plane, and the matching block 110 moves between the first limiting wall 320 and the second limiting wall 330, so that the tilting angle of the back frame 100 can be limited, and excessive rotation of the back frame 100 is avoided. Wherein, the maximum back inclination angle of the back frame 100 is 15 degrees, the maximum front inclination angle is 7 degrees, and the back frame 100 can still support the back of the sitting person when the sitting person leans forward for sitting. The existing chair back and seat plate linkage adjustment and chair back adjustment do not have the forward tilting function of the back frame by means of deformation backward tilting, and when a seated user sits forward, the back frame cannot well support the back of the seated user. Further, referring to fig. 1 to 3 again, the seat frame 200 is fixedly connected with the back frame 100 through the connection post 120, wherein the seat frame 200 is provided with a socket groove 202, the back frame 100 is provided with a socket arm 101, and the socket arm 101 is in socket fit with the socket groove 202. Optionally, the connection post 120 is a screw, and the plug arm 101 is provided with a screw sleeve 1011, the connection post 120 is provided with a compression block 130, and the connection post 120 sequentially penetrates through the matching block 110, the compression block 130 and is in screw connection with the screw sleeve 1011 so as to drive the compression block 130 to compress the seat frame 200. Specifically, when the back frame 100 rotates, the connection post 120 rotates together with the back frame 100, and the first limiting wall 320 and the second limiting wall 330 are respectively located at two sides of the connection post 120 and are used for limiting the rotation angle of the connection post 120. For example, the first limiting wall 320 is located on a side of the connection post 120 facing the back frame 100, and the second limiting wall 330 is located on a side of the connection post 120 facing away from the back frame 100. The included angle between the first limiting wall 320 and the horizontal plane is 75 degrees, and when the connecting column 120 is abutted against the first limiting wall 320, the back frame 100 is inclined backwards by 15 degrees; the second limiting wall 330 has an included angle of 83 ° with the horizontal plane, and when the connecting post 120 abuts against the second limiting wall 330, the back frame 100 tilts forward by 7 °. In addition, referring to fig. 1 and 5 again, the cross frame 300 is provided with a positioning wall 340, the positioning wall 340 is located below the first limiting wall 320, the positioning wall 340 is used for positioning the connecting column 120, specifically, when a seated user sits down forcefully, the connecting column 120 moves downward and abuts against the positioning wall 340 to drive the center line of the connecting column 120 to rotate to coincide with the vertical direction, at this time, the end face of the seat frame 200 is horizontal, and the seated user sits horizontally. It should be noted that, when the included angle between the positioning wall 340 and the vertical direction is a, a=0° and the connecting column 120 abuts against the positioning wall 340, the connecting column 120 is vertically disposed, but the end face of the seat frame 200 may be obliquely disposed, so that the level is relatively level, in practical application, the end face of the seat frame 200 may be slightly obliquely disposed backward, or the positioning wall 340 and the vertical direction have a certain included angle, in some embodiments, the following is satisfied: a is more than or equal to 0 degree and less than or equal to 5 degrees.

In some embodiments of the present utility model, an elastic member is connected between the back frame 100 and the cross frame 300, and both ends of the elastic member are connected to the back frame 100 and the cross frame 300, respectively. In some embodiments, the elastic member is a compression spring (not shown in the figure), and different from the compression spring connecting and matching block, two ends of the elastic member can be respectively connected with the back frame and the transverse frame, the elastic member is not required to be arranged in a space formed by the special-shaped wall, the assembly space is larger, and the elastic member is more convenient to assemble. Wherein, leave the rotation space 201 between seat frame 200 and the crossbearer 300, the elastic component sets up in the rotation space, and the both ends of elastic component are connected with seat board and crossbearer respectively. In some embodiments, referring to fig. 1 to 3, the elastic member is an elastic cushion 400, the seat frame 200 is fixed to the back frame 100, and the rotation space 201 is used for rotation of the back frame 100 and the seat frame 200. It is easily understood that the cross frame 300 does not block the rotation of the back frame 100 and the seat frame 200 due to the existence of the rotation space 201. The elastic cushion 400 is provided in the rotation space 201 to cushion the seat frame 200 rotated with the back frame 100. In addition, compared with the compression spring, the elastic cushion 400 can drive the matching block 110 to press against the special-shaped wall 310, and the elastic cushion 400 has softer texture and wider contact area, so that a user sits on the seat frame 200 more comfortably. In some embodiments, there are two elastic members, one on each side of the mating block 110, to accommodate the seated user's leaning forward and backward sitting positions, respectively. In some embodiments, the cross frame 300 is provided with a mounting groove 301, and the elastic cushion 400 is mounted in the mounting groove 301, so as to effectively prevent the elastic cushion 400 from being offset out of the rotation space 201. Further, the cross frame 300 is provided with fixing protrusions 3011, and the fixing protrusions 3011 are provided to extend into the elastic cushion 400. Optionally, a fixing protrusion 3011 is disposed at the bottom wall of the mounting groove 301 to further fix the elastic cushion 400, so as to avoid the elastic cushion 400 from being deflected. Further, referring again to fig. 2, the two elastic cushions 400 are connected to each other, further improving the firmness of the installation of the elastic cushions 400.

The chair according to the embodiment of the utility model comprises the chair back leaning structure according to the embodiment of the utility model. The cross frame 300 is used as a bearing part of a seat, the cross frame 300 is provided with the special-shaped wall 310 with an arc-shaped structure, when the matching block 110 and the special-shaped wall 310 relatively slide, the back frame 100 adjusts the tilting angle along with the rotation of the matching block 110, the connecting structure is simple and compact, and furthermore, when a sitting person sits, the back frame 100 can realize self-adaptive tilting according to the sitting posture of the sitting person.

Other constructions and operation of seats according to embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the embodiments described above, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. The back of the chair leans on structure, its characterized in that includes:

the back frame is fixedly connected with a matching block;

2. The chair back recline structure of claim 1, wherein: the special-shaped wall is convexly arranged, the matching block is connected with a pressing piece, and the pressing piece is used for driving the matching block to press against the bottom wall of the special-shaped wall.

3. The chair back recline structure of claim 1, wherein: the cooperation piece is provided with first arc wall, the dysmorphism wall includes the second arc wall, first arc wall with second arc wall sliding connection.

4. The chair back recline structure of claim 1, wherein: the transverse frame is provided with a first limiting wall and a second limiting wall which are oppositely arranged, the first limiting wall and the second limiting wall are obliquely arranged with a horizontal plane, and the matching block moves between the first limiting wall and the second limiting wall.

5. A chair back recline structure according to any one of claims 1 to 4, wherein: elastic pieces are connected between the back frame and the transverse frames, and two ends of each elastic piece are connected with the back frame and the transverse frames respectively.

6. The chair back recline structure of claim 5, wherein: the two elastic pieces are respectively positioned at two sides of the matching block.

7. The chair back recline structure of claim 6, wherein: the elastic piece is an elastic cushion.

8. The chair back recline structure of claim 7, wherein: the cross frame is provided with a mounting groove, and the elastic cushion is mounted in the mounting groove.

9. The chair back recline structure according to claim 7 or 8, characterized in that: the cross frame is provided with a fixing protrusion, and the fixing protrusion stretches into the elastic cushion.

10. The seat, its characterized in that: a chair back tilt structure comprising a chair back as claimed in any one of claims 1 to 9.