CN214631141U

CN214631141U - Chair back assembly

Info

Publication number: CN214631141U
Application number: CN202023329394.5U
Authority: CN
Inventors: 吕成纲; 程军
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-11-09
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a chair back component, which comprises a back support and a waist rest, wherein the waist rest is rotationally arranged at the front side of the back support, the rotational connection point of the back rest and the waist rest is positioned at the lower part of the waist rest, the waist rest is configured to support the waist of a human body, and when the waist rest rotates in response to the force of leaning on the human body, the upper end of the waist rest rotates backwards to be attached to and support the waist of the human body; compared with the prior art, when a human body bends over to lean on the chair back, the bending position of the waist and the back cannot be at the lower end of the chair back, but at the middle lower part of the chair back, when the waist leans on the lower part, the upper end of the waist leans on the upper end to rotate backwards, so as to cater to the bending of the waist and the back of the human body, and the waist leans on the lower part of the waist and the bearing of the waist all the time, thereby avoiding 'getting off the waist', and ensuring higher comfort.

Description

Chair back assembly

Technical Field

The utility model relates to an office furniture field, in particular to back of chair subassembly.

Background

The existing partial chairs on the market are provided with lumbar supports for better supporting the waist of a human body, wherein a plurality of movable or rotatable lumbar supports have the same characteristic, and when the chair is leaned against by the waist of the human body, the lower ends of the lumbar supports can rotate backwards, namely the rotating points of the lumbar supports are positioned at the upper parts of the lumbar supports; under the condition, the chair back can be attached to and support the back of a human body, but the lower end of the waist support rotates and falls reversely, so that the waist support is separated from the waist of the human body more or less, the function of the waist support is invalid, the waist of a user cannot be supported sufficiently at the moment, and the use comfort is reduced; we refer to this as the "waisting" phenomenon.

Chinese utility model patent CN201759134U provides a movable chair back structure, which is mainly composed of an upper back plate pivoted in front of a chair back frame, a lower back plate connected to the lower end of the upper back plate via an elastic sheet, and a chair back frame connected to the lower back plate via an elastic plate, so that the lower back plate can swing forward, backward, leftward and rightward relative to the upper back plate; however, when the user leans backwards, the lower back plate is stressed to enable the lower end of the lower back plate to rotate backwards, and the lower back plate can be separated from the waist of the human body at the moment, so that the comfort is reduced.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a chair back component, this seat can avoid "taking off the waist" and really realize the effect of holding in the palm the waist.

The technical scheme of the utility model is realized like this:

a chair back assembly comprising:

a back support configured to connect to a seat;

the waist support is arranged on the front side of the back support and is configured to support the waist of a human body; the waist support and the back support are rotatably connected, and the rotating connection point of the waist support and the back support is positioned at the lower part of the waist support;

when the waist rest rotates in response to the leaning force of the human body, the upper end of the waist rest rotates backwards to fit and support the waist of the human body.

Usually, when a human body bends over and leans on the chair back, the bending position of the waist and the back cannot be at the lower end position of the chair back, but at the middle lower part of the chair back, when the waist leaning rotation point is arranged at the lower part of the waist leaning on, the upper end of the waist leaning on can rotate backwards so as to cater to the bending of the waist and the back of the human body, and at the moment, the waist leaning on is always positioned below the waist and supports the waist leaning on, so that the 'waist falling off' is avoided, and the comfort is higher.

Preferably, the back support comprises a generally X-shaped connecting portion having two first connecting arms extending upwardly and two second connecting arms extending downwardly; the waist rest is rotationally connected with the second connecting arm. The molding of the connecting part can save materials and reduce cost.

Preferably, a second rotating seat is arranged on the front surface of the second connecting arm near the end part, and the second rotating seat is provided with a rotating shaft hole penetrating through the second rotating shaft seat along the left-right direction; the waist rest is of a frame structure and is provided with a second hollow part; a second jack which corresponds to the second rotating seat and has an opening facing the second hollow-out part is arranged on the waist rest; and the two second connecting arms enter the second hollow part, and the rotating shaft hole of the second rotating seat is aligned with the second jack and is rotatably connected with the rotating shaft hole through the rotating shaft inserted in the second rotating seat. It can be seen that the waist rest is rotationally connected to the connecting part, and the waist rest is simple in structure, easy to implement, low in cost and convenient to install.

Preferably, the waist rest is of a frame structure and comprises a second upper cross rod, a second lower cross rod and two second vertical rods connected with the ends of the second upper cross rod and the second lower cross rod; the shape of the end part of the second connecting arm is attached to the shape of the joint of the second lower cross rod and the second vertical rod. The overall aesthetic degree of the seat is improved.

Preferably, the back support further comprises a transition portion configured to connect the connecting portion to the seat; form the downside fork between two second linking arms, be equipped with the fixed plate in the downside fork, and fixed plate and connecting portion integrated into one piece, connecting portion pass through fixed plate fixed connection with transition portion.

Preferably, the back support is a column, a second rotating shaft seat which is located at the lower part of the back support and protrudes forwards is arranged on the back support, and the lower part of the waist rest is rotatably connected to the second rotating shaft seat.

Preferably, the edge of the lumbar support is provided with a skirt for hiding the edge of the mesh. The overall attractiveness of the seat is improved, the appearance of the seat is more atmospheric, and the eyeball is attracted.

Preferably, a second elastic element is arranged between the waist support and the back support, and the second elastic element is configured to act on the upper end of the waist support and provide a restoring force for the waist support. The setting of second elastic component makes the rotation that the waist leaned on have the ability of buffering and resilience, laminates human back and provides sufficient holding power more, has promoted the travelling comfort greatly.

Preferably, the second elastic element is a plastic reset elastic sheet. The plastic reset spring plate has mature technology and low cost.

Preferably, the second elastic part is in a shape of a long and thin strip, and two limiting bosses which are arranged at intervals in the vertical direction are arranged at the upper end of the second elastic part; the waist rest is of a frame structure and comprises a second upper cross bar positioned at the upper end; the second upper cross rod is provided with a mounting groove, the mounting groove is a long groove which is communicated up and down and comprises an access section and a fixed section, the groove width of the fixed section is smaller than that of the access section, the access section is configured to avoid a limiting boss, so that the second elastic piece enters the mounting groove, and the fixed section is configured to prevent the second elastic piece from being separated from the mounting groove when the mounting groove is positioned between two limiting blocks. The second elastic piece is installed to the waist and does not need screws, so that the installation is convenient and labor-saving, and the assembly efficiency of the seat is improved.

Preferably, an elastic limiting column is further arranged on the access section, a limiting block is arranged at the end of the elastic limiting column, the limiting block is located at the position where the access section is adjacent to the fixing section, and the elastic limiting column and the limiting block are configured to enable the second elastic piece to enter the fixing section from the access section and prevent the second elastic piece from returning to the access section from the fixing section. Further enabling the second elastic member to be firmly connected with the lumbar support without screws.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

the utility model has the advantages that:

1. usually, when a human body bends over and leans on the chair back, the bending position of the waist and the back cannot be at the lower end position of the chair back, but at the middle lower part of the chair back, when the waist leaning rotation point is arranged at the lower part of the waist leaning on, the upper end of the waist leaning on can rotate backwards so as to cater to the bending of the waist and the back of the human body, and at the moment, the waist leaning on is always positioned below the waist and supports the waist leaning on, so that the 'waist falling off' is avoided, and the comfort is higher.

2. The cost is reduced by the modeling of the connecting part, the connecting mode of the connecting part and the waist rest and the selection of the second elastic part; meanwhile, the installation of the second elastic piece is more convenient, and the assembly speed is increased.

3. The combination of the X-shaped connecting part and the waist rest and the skirt arranged on the waist rest make the seat more beautiful and attract the attention of potential customers.

Drawings

Fig. 1 is a schematic perspective view of a seat according to a first embodiment of the present invention;

fig. 2 is a side view of the rotation of the back support and the lumbar support according to the first embodiment of the present invention;

FIG. 3 is a front view of the seat assembly according to the first embodiment of the present invention;

fig. 4 is a schematic perspective view of a transition portion and a connecting portion according to a first embodiment of the present invention;

fig. 5 is a schematic perspective view of a connection portion according to a first embodiment of the present invention;

fig. 6 is a front view of a connecting portion according to a first embodiment of the present invention;

fig. 7 is a schematic perspective view of a back support according to a first embodiment of the present invention;

fig. 8 is a schematic perspective view of a lumbar support according to a first embodiment of the present invention;

fig. 9 is a schematic perspective view of the first embodiment of the present invention showing the connection between the back support member, the waist rest and the back support, and the connection between the first and second elastic pieces;

fig. 10 is a schematic perspective view of a first elastic sheet according to a first embodiment of the present invention;

fig. 11 is a schematic perspective view of a second elastic piece according to a first embodiment of the present invention;

fig. 12 is a schematic perspective view of the second elastic sheet mounted on the lumbar support according to the first embodiment of the present invention;

fig. 13 is a comparison view of the back support member and the lumbar support before and after rotation according to the first embodiment of the present invention;

fig. 14 is a schematic perspective view of a back support, a lumbar support and a back support according to a second embodiment of the present invention;

fig. 15 is a side view of the back support and the lumbar support of the second embodiment of the present invention mounted on the back frame.

The figures are numbered: a back support 1; a seat 2; an armrest 3; a lifting air rod 4; five-star feet 5; a back support 6; a first hollow portion 61; a first receptacle 62; a first upper cross bar 6 a; a first lower cross bar 6 b; a first vertical bar 6 c; a waist support 7; the second hollow portion 71; a second receptacle 72; a second upper cross bar 7 a; a second lower cross bar 7 b; a second vertical bar 7 c; a transition portion 8; a connecting portion 9; a first connecting arm 91; a second connecting arm 92; a fixing plate 10; a first rotating base 11; a second rotary base 12; a rotating shaft hole 13; a rotating shaft 14; a first elastic member 15; a first spring piece 15 a; a second elastic sheet 15 b; a confluent portion 15 c; a second elastic member 16; a limiting boss 17; a mounting groove 18; an access segment 18 a; a fixed section 18 b; an elastic stopper column 19; a limiting block 20, a first shaft seat 21; a second spindle base 22.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific implementation manner of the utility model is as follows:

example 1: the utility model provides a chair, which comprises a back support 1 and a waist support 7, wherein the waist support 7 is rotationally arranged at the front side of the back support 1, the rotational connection point of the waist support 1 and the waist support 7 is positioned at the lower part of the waist support 7, and the waist support 7 is configured to support the waist of a human body; the lumbar support 7 of the seat may be a lumbar support 7 additionally added besides the seat back, or may be a lumbar support 7 included in the seat back, that is, the seat back is divided into an upper back and a lower back, and the present embodiment adopts a second form, specifically:

as shown in fig. 1, the chair in this embodiment further includes a chair back assembly, a chair seat 2 for supporting a human body to sit on, armrests 3 disposed at two sides of the chair seat 2, a lifting air rod 4 configured to adjust the height of the chair seat 2, and five-star feet 5 disposed at the lower end of the lifting air rod 4; the back support 1 is configured to be directly or indirectly connected with the seat 2, in this embodiment, the back support 1 is rotatably connected with the seat 2 through a chassis, the chassis is fixedly installed at the bottom of the seat 2, and the upper end of the lifting air rod 4 is inserted into the chassis; the chair back component is arranged at the front side of the back bracket 1, the chair back component is configured to support the waist and back of a human body, and the waist support 7 is a part of the chair back component.

Further, as shown in fig. 2 and 3, in order to enable the chair back assembly to reasonably support the waist and back of the human body, the chair back assembly adopts an upper-lower double-back structure: the chair back assembly further comprises a back support 6; the back support piece 6 and the waist support 7 are separated up and down and are respectively connected to the back bracket 1 in a rotating way, and the respective rotating axes of the back support piece 6 and the waist support 7 are arranged along the left and right direction of the chair; as shown in fig. 13, the separate back support 6 and lumbar support 7 are rotatably connected to the back frame 1, which makes the chair back assembly have better mobility and can adapt to the variable lumbar curve of the human body, and the lumbar curve is generally curved backward, so that when the back support 6 and lumbar support 7 rotate in response to the leaning force of the human body, the rotation directions of the back support 6 and lumbar support 7 are opposite and form a curve fitting the back of the lumbar back of the human body, i.e. as shown in fig. 2, the lower end of the back support 6 rotates backward (counterclockwise rotation), the upper end of the lumbar support 7 rotates backward (clockwise rotation), the lumbar of the human body is located between the back support 6 and lumbar support 7, and the lumbar support 7 is located below the lumbar portion, thereby effectively and better supporting the lumbar portion, and having high comfort; specifically, the method comprises the following steps:

the upper end of the back support 6 is rotatably connected with the upper end of the back bracket 1, and the lower end of the waist rest 7 is rotatably connected with the back bracket 1; as shown in fig. 4-6, the back frame 1 includes a transition portion 8 and a substantially X-shaped connecting portion 9, the transition portion 8 is an L-shaped steel plate, and the transition portion 8 is configured to connect the chassis and the connecting portion 9; because the connecting portion 9 is X-shaped, the connecting portion 9 has two first connecting arms 91 extending upward and two second connecting arms 92 extending downward, i.e. the first connecting arms 91 are located at the upper side of the connecting portion 9, and the second connecting arms 92 are located at the lower side of the connecting portion 9; the waist rest is rotationally connected with the second connecting arm; a lower side fork is formed between the two lower second connecting arms 92, a fixing plate 10 is arranged in the lower side fork, the fixing plate 10 and the connecting part 9 are integrally formed, and the connecting part 9 and the transition part 8 are fixedly connected through the fixing plate 10; the front surfaces of the two upper first connecting arms 91 close to the end parts are provided with first rotating seats 11, the front surfaces of the two lower second connecting arms 92 close to the end parts are provided with second rotating seats 12, and the first rotating seats 11 and the second rotating seats 12 are provided with rotating shaft holes 13 which penetrate through the first rotating shafts 14 or the second rotating shafts 14 along the left-right direction; as shown in fig. 7 and 8, the back support member 6 and the lumbar support 7 are both frame structures with skirt edges, and the skirt edges can hide the edges of the mesh cloth to make the seat more beautiful; the back support 6 is provided with a first hollow part 61, the lumbar support 7 is provided with a second hollow part 71, the back support 6 is provided with a first jack 62 corresponding to the first rotating seat 11 and opening towards the first hollow part 61, and the lumbar support 7 is provided with a second jack 72 corresponding to the second rotating seat 12 and opening towards the second hollow part 71; the back support member 6 comprises a first upper cross bar 6a, a first lower cross bar 6b and two first vertical bars 6c connected with the ends of the first upper cross bar 6a and the first lower cross bar 6 b; the waist support 7 comprises a second upper cross bar 7a, a second lower cross bar 7b and two second vertical bars 7c connected with the ends of the second upper cross bar 7a and the second lower cross bar 7 b; as shown in fig. 9, after the two first connecting arms 91 on the upper side of the rotating part enter the first hollow part 61, the end shapes of the two first connecting arms 91 are fitted with the shape of the joint of the first upper cross bar 6a and the first vertical bar 6c, and at this time, the rotating shaft hole 13 of the first rotating seat 11 is aligned with the first inserting hole 62 and is rotatably connected through a rotating shaft 14 inserted between the two; similarly, after the two second connecting arms 92 at the lower side of the rotating portion enter the second hollow portion 71, the end shapes of the two second connecting arms 92 are fitted with the shape of the joint of the second lower cross bar 7b and the second vertical bar 7c, and at this time, the rotating shaft hole 13 of the second rotating seat 12 is aligned with the second insertion hole 72 and is rotatably connected through a rotating shaft 14 inserted between the two.

In addition, as shown in fig. 1, 2 and 9, in order to enable the back support member 6 and the lumbar support 7 to be reset after rotating, and have resilience capability at the same time, so as to be more fit with the back of the human body, a first elastic member 15 is arranged between the back support member 6 and the back bracket 1, and the first elastic member is configured to act on the lower end of the back support member 6 and provide a resetting force for the back support member 6; a second elastic piece 16 is arranged between the waist support 7 and the back bracket 1, and the second elastic piece 16 is configured to act on the upper end of the waist support 7 and provide a resetting force for the waist support 7; as shown in fig. 10 and 11, the first elastic member 15 and the second elastic member 16 are plastic reset elastic sheets, the first elastic member 15 is in a V-shaped plate shape, the first elastic member 15 has a first elastic sheet 15a, a second elastic sheet 15b and a junction portion 15c, the first elastic sheet 15a and the second elastic sheet 15b have an included angle, and both are connected to the junction portion 15 c; the first insertion hole 62 is formed in the position, close to the upper end, of the first vertical rod 6 c; the first elastic sheet 15a and the second elastic sheet 15b are connected to the first connecting arm 91, and the junction part 15c is inserted into the first lower cross bar 6 b; the second elastic part 16 is in a slender strip shape and is vertically arranged between the waist rest 7 and the back support 1, and the second insertion hole 72 is formed in the position, close to the lower end, of the second vertical rod 7 c; the lower end of the second elastic member 16 is mounted on the back bracket 1, and the upper end of the second elastic member 16 is inserted into the second upper cross bar 7 a.

As shown in fig. 1, 11, and 12, two limiting bosses 17 are disposed at an upper end of the second elastic member 16 at intervals in the vertical direction, a mounting groove 18 is disposed on the second upper cross bar 7a, the mounting groove 18 is a vertically through long groove and includes an access section 18a and a fixed section 18b, a width of the fixed section 18b is smaller than a width of the access section 18a, the access section 18a is configured to avoid the limiting bosses 17, so that the second elastic member 16 enters the mounting groove 18, and the fixed section 18b is configured to prevent the second elastic member 16 from coming out of the mounting groove 18; the connection section 18a is further provided with an elastic limiting column 19, the end of the elastic limiting column 19 is provided with a limiting block 20, the limiting block 20 is located at the position where the connection section 18a is adjacent to the fixing section 18b, and the elastic limiting column 19 and the limiting block 20 are configured to enable the second elastic element 16 to enter the fixing section 18b from the connection section 18a and prevent the second elastic element 16 from returning to the connection section 18a from the fixing section 18 b.

Example 2: the difference between the embodiment and the embodiment 1 lies in the difference of the back support, and other parts are changed correspondingly to adapt to the back support.

As shown in fig. 14 and 15, the back support 1 is a column, the back support 1 is provided with a first rotating shaft seat 21 which is located at the upper part of the back support 1 and protrudes forward and a second rotating shaft seat 22 which is located at the lower part of the back support 1 and protrudes forward, the upper part of the back support 6 is rotatably connected to the first rotating shaft seat 21, and the lower part of the lumbar support 7 is rotatably connected to the second rotating shaft seat 22; a first upper cross bar 6a of the back support 6 is provided with a first rotating seat 11 protruding downwards, a second lower cross bar 7b of the waist rest 7 is provided with a second rotating seat 12 (not shown), the first rotating seat 11 is rotatably connected with a first rotating shaft seat 21 through a rotating shaft (not shown), and the second rotating seat 12 is rotatably connected with a second rotating shaft seat 22 through a rotating shaft; the first elastic element 15 and the second elastic element 16 are both strip-shaped plastic return elastic pieces.

Claims

1. A chair back assembly, comprising:

a back support configured to connect to a seat;

2. The chair back assembly of claim 1, wherein: the back bracket comprises a connecting part which is approximately X-shaped and is provided with two first connecting arms extending upwards and two second connecting arms extending downwards; the waist rest is rotationally connected with the second connecting arm.

3. The chair back assembly of claim 2, wherein: a second rotating seat is arranged on the front surface of the part, close to the second connecting arm, of the second connecting arm, and the second rotating seat is provided with a rotating shaft hole penetrating through the second rotating shaft seat along the left-right direction; the waist rest is of a frame structure and is provided with a second hollow part; a second jack which corresponds to the second rotating seat and has an opening facing the second hollow-out part is arranged on the waist rest; and the two second connecting arms enter the second hollow part, and the rotating shaft hole of the second rotating seat is aligned with the second jack and is rotatably connected with the rotating shaft hole through the rotating shaft inserted in the second rotating seat.

4. The chair back assembly of claim 3, wherein: the waist rest is of a frame structure and comprises a second upper cross rod, a second lower cross rod and two second vertical rods connected with the ends of the second upper cross rod and the second lower cross rod; the shape of the end part of the second connecting arm is attached to the shape of the joint of the second lower cross rod and the second vertical rod.

5. The chair back assembly of claim 2, wherein: the back support further comprises a transition part, and the transition part is configured to connect the connecting part to the seat; form the downside fork between two second linking arms, be equipped with the fixed plate in the downside fork, and fixed plate and connecting portion integrated into one piece, connecting portion pass through fixed plate fixed connection with transition portion.

6. The chair back assembly of claim 1, wherein: the back support is a column, a second rotating shaft seat which is arranged on the lower portion of the back support and protrudes forwards is arranged on the back support, and the waist rest lower portion is rotatably connected to the second rotating shaft seat.

7. The chair back assembly of claim 1, wherein: and a second elastic piece is arranged between the waist support and the back support, and the second elastic piece is configured to act on the upper end of the waist support and provide resetting force for the waist support.

8. The chair back assembly of claim 7, wherein: the second elastic piece is a plastic reset elastic piece.

9. The chair back assembly of claim 7, wherein: the second elastic piece is in a long and thin strip shape, and two limiting bosses which are arranged at intervals in the vertical direction are arranged at the upper end of the second elastic piece; the waist rest is of a frame structure and comprises a second upper cross bar positioned at the upper end; the second upper cross rod is provided with a mounting groove, the mounting groove is a long groove which is communicated up and down and comprises an access section and a fixed section, the groove width of the fixed section is smaller than that of the access section, the access section is configured to avoid a limiting boss, so that the second elastic piece enters the mounting groove, and the fixed section is configured to prevent the second elastic piece from being separated from the mounting groove when the mounting groove is positioned between two limiting blocks.

10. The chair back assembly of claim 9, wherein: the access section is further provided with an elastic limiting column, the end part of the elastic limiting column is provided with a limiting block, the limiting block is positioned at the position where the access section is adjacent to the fixed section, and the elastic limiting column and the limiting block are configured to enable the second elastic piece to enter the fixed section from the access section and prevent the second elastic piece from returning to the access section from the fixed section.