CN216753987U - Chair back support and chair - Google Patents

Abstract

The utility model relates to the technical field of seats, and discloses a seat, which comprises: the seat comprises a connecting bracket used for connecting a seat chassis, and a waist rest, a backrest and a headrest which are arranged on the connecting bracket; the backrest is characterized by comprising a left back frame and a right back frame which can swing inside and outside, the inner end of each back frame is rotatably connected with the connecting support through a rotating shaft, and the outer end of each back frame is connected with the connecting support through an elastic support. The chair back support and the chair provided by the utility model have the characteristic that the left-right opening angle of the backrest is adjustable, and the leaning comfort is better.

Description

Back of chair support and seat

Technical Field

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

Background

An office chair is an indispensable article in daily work and study of people. Common office chairs generally comprise a chair chassis and a backrest, and in order to improve the sitting and leaning comfort, a waist rest and a headrest are additionally arranged on some office chairs.

For example, a chinese utility model patent with publication number CN209660969U discloses a seat, which comprises a walking part, wherein the walking part is provided with a connecting column connected to a chassis, the chassis is provided with a seat, the left side and the right side of the seat are respectively provided with a left side armrest and a right side armrest, the left side armrest is connected to the bottom of the seat through a left side L-shaped connecting piece, and the right side armrest is connected to the bottom of the seat through a right side L-shaped connecting piece; the backrest is provided with a frame body, a backrest surface is arranged in the frame body, the support in the L shape is provided with a vertical part and a horizontal part, the horizontal part is connected to the chassis, two arc-shaped supporting bodies are arranged in the vertical part, the arc-shaped supporting bodies are connected with the frame body, a sliding groove is arranged in the vertical part, the waist support is arranged on the rear side of the backrest surface, the rear side of the waist support is connected with the sliding groove through an adjusting part, and the top of the frame body is detachably provided with a clothes hanger and a headrest. The chair structure provided by the utility model can lift the waist support, the backrest and the like as required to adapt to users with different heights; however, the shape that the backrest is opened from left to right is fixed, so that the backrest is difficult to adapt to users with different statures, and the wrapping property is poor.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a chair back support with adjustable left and right opening angles.

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

In order to achieve the purpose, the utility model adopts the following technical scheme.

A chair back bracket, comprising: the seat comprises a connecting bracket used for connecting a seat chassis, and a waist rest, a backrest and a headrest which are arranged on the connecting bracket; the backrest is characterized by comprising a left back frame and a right back frame which can swing inside and outside, the inner end of each back frame is rotatably connected with the connecting support through a rotating shaft, and the outer end of each back frame is connected with the connecting support through an elastic support.

More preferably, the left and right back frames have the same structure and are symmetrically arranged.

More preferably, the back frames corresponding to the left and right frames are respectively provided with corresponding elastic supports, and the two elastic supports are symmetrically arranged and are both frame structures.

More preferably, a lifting slide block is mounted on the connecting bracket, and the waist rest, the backrest and the headrest are connected with the lifting slide block and are lifted and adjusted together with the lifting slide block; the rotating shaft and the elastic support are arranged on the lifting slide block.

More preferably, the lifting slider is further provided with a clothes hanger, and the headrest and the clothes hanger are mounted in a height-adjustable lifting manner.

More preferably, an elastic support frame is arranged corresponding to the waist rest, the upper side of the waist rest forms a rotary connection, and a spring is arranged at the lower side of the waist rest.

More preferably, the lifting adjusting structure between the lifting slider and the connecting bracket is: one of the lifting slide block and the connecting bracket is provided with a lifting groove, and the other is provided with a lifting limiting piece.

The lift locating part includes the spacing goods of furniture for display rather than for use of first lift and the spacing goods of furniture for display rather than for use of second lift, first lift spacing goods of furniture for display rather than for use with the upper end and the same oscillating axle rotation of the spacing goods of furniture for display rather than for use of second lift are connected, and the lower extreme constitutes open structure through support piece, support piece has little deformation automatic re-setting and the dead effect of big deformation mutual card.

The both sides in lift groove are equipped with a plurality ofly respectively with state first lift limit goods of furniture for display rather than for use and the spacing goods of furniture for display rather than for use complex spacing groove of second lift limit goods of furniture for display rather than for use the top in lift groove be equipped with the spacing goods of furniture for display rather than for use of first lift with the extrusion groove that the spacing goods of furniture for display rather than for use of second lift was drawn in the bottom in lift groove is equipped with the arch with the spacing goods of furniture for display rather than for use of first lift with the spacing goods of furniture for display rather than for use of second lift struts.

More preferably, the support member is formed by an arc protrusion and an arc groove which are fitted to each other, and an opening of the arc groove is smaller than a maximum size of the arc protrusion.

More preferably, the waist rest, the backrest and the headrest are all of inner and outer frame buckling structures, and the inner and outer frames are fixedly connected through screws or buckles.

A seat comprises a seat chassis, and the seat back support is arranged on the seat chassis.

The utility model has the beneficial effects that: 1) through setting to leaning on to set up to carry out two back and corresponding elastic support about the inside and outside wobbling, leaning on as the user lean on when leaning on, the frame of backing a back receives human extrusion can automatic outside swing, meanwhile, elastic support gives an inside reaction force of frame of backing a back to the messenger leans on and carries out the parcel of more laminating between the human body, and it is better to paste the travelling comfort. 2) A specific lifting groove and a lifting limiting piece are adopted between the lifting slide block and the connecting bracket; when the lifting limiting swing device works in practice, the lifting limiting swing piece can be matched with different limiting grooves by pulling the lifting sliding block upwards, so that lifting limiting is realized; when the lifting slide block rises to the highest position, the first lifting limiting swing part and the second lifting limiting swing part are folded under the extrusion action of the extrusion groove, and then are separated from the limiting groove, can smoothly fall to the lowest position, and are separated again under the action of the protrusion; simple structure, the lift adjustment is convenient.

Drawings

Fig. 1 is a schematic structural view of a chair back bracket provided by the utility model.

Fig. 2 is a schematic structural view of the chair back bracket according to another aspect of the present invention.

Fig. 3 is a schematic view showing the assembly of the backrest.

Figure 4 is a schematic view of the back rest support with the back rest removed.

Fig. 5 is a schematic structural diagram of the lifting slider.

Fig. 6 is a schematic structural view of the lifting groove.

Reference numerals indicate the same.

1: connecting bracket, 2: lumbar support, 3: backrest, 3-1: back frame, 4: headrest, 5: pivot, 6 elastic support, 7: lifting slide block, 8: clothes hanger, 9: spring, 10-1: first lift limit swing, 10-2: second lift limit swing, 10-3: swing shaft, 10-4: support member, 11: lifting groove, 11-1: limiting groove, 11-2: extrusion groove, 11-3: and (4) protruding.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the utility model, "at least" means one or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. First feature "above", "below" and "under" second feature may include first feature being directly below or obliquely below the second feature, or merely indicating that the first feature is at a lower level than the second feature.

The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the utility model, but are not to be construed as limiting the utility model.

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.

Example 1.

As shown in fig. 1 and 2, a chair back bracket includes: a connecting bracket 1 used for connecting a seat chassis, and a waist rest 2, a backrest 3 and a headrest 4 which are arranged on the connecting bracket 1. Wherein, install lifting slide on linking bridge 1, the waist leans on 2, lean against 3 with headrest 4 all with lifting slide is connected, along with lifting slide carries out lift adjustment together.

In this embodiment, the lumbar support 2, the backrest 3 and the headrest 4 all adopt an inner frame and an outer frame, a plurality of upright posts are fixed on the outer frame through screws, a plurality of small holes are formed in the inner frame, and the small holes are in fit butt joint with the upright posts. Obviously, the connection structure of the inner frame and the outer frame is not limited to the above examples, and those skilled in the art may also adopt other bolting and fastening structures that are currently known or can be realized in the future according to the difference of actual needs; the present embodiment is not limited.

The chair back support provided by the embodiment is mainly characterized in that the backrest 3 comprises a left back frame and a right back frame which can swing inside and outside. The left back frame and the right back frame are consistent in structure and are symmetrically arranged. Corresponding elastic supports are respectively arranged corresponding to the left back frame and the right back frame, and the two elastic supports are symmetrically arranged and are both frame structures; the elastic supports form a shape similar to a butterfly wing. The following description will be made in detail by taking the right back frame as an example.

Referring to fig. 3, a rotating shaft 5 and an elastic support 6 are arranged on the lifting slide block, the inner end of the back frame 3-1 is rotatably connected with the rotating shaft 5, and the outer end is connected with the elastic support 6. When a user leans against the backrest 3, the back frame 3-1 automatically swings outwards after being squeezed by the human body, and meanwhile, the elastic support 6 provides an inward reaction force for the back frame 3-1, so that the backrest 3 and the human body are wrapped in a more fit mode, and the fitting comfort is better.

In this embodiment, the elastic support 6 is preferably a frame structure, and has a large contact surface with the back frame 3-1, and the rebound effect is best. In other embodiments, according to different actual needs, the shape of the elastic support 6 can be appropriately changed by those skilled in the art as long as the elastic reaction force can be provided, and the present invention is not limited to this embodiment.

As shown in fig. 4, the lifting slider 7 is further provided with a clothes hanger 8, and the headrest 4 and the clothes hanger 8 are mounted in a height-adjustable lifting manner. In practical applications, the height between the headrest 4 and the backrest 3 can be changed as appropriate according to different users. The lifting adjustment of the headrest 4 can adopt the existing known marble and clamping groove matched limit structure, and the height adjustment of the headrest can be realized only by applying certain pressing and pulling force on the headrest 4.

In addition, in the embodiment, a butterfly wing-shaped elastic support frame is arranged corresponding to the lumbar support 2, so as to improve the deformation resistance of the lumbar support 2. The upper side of the waist support 2 is rotationally connected with the lifting slide block 7, and a spring 9 is arranged between the lower side of the waist support 2 and the lifting slide block 7. Thus, the waist support 2 has a front-back displacement margin, and can better support the waist of the user.

With reference to fig. 5 and 6, the lifting adjusting structure between the lifting slider 7 and the connecting bracket 1 is: a first lifting limit swing part 10-1 and a second lifting limit swing part 10-2 are arranged on the lifting slide block 7, and a lifting groove 11 is formed in the connecting bracket 1; the upper ends of the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 are rotatably connected with the same swing shaft 10-3, the lower ends of the first lifting limit swing part and the second lifting limit swing part form an opening structure through a supporting part 10-4, and the supporting part 10-4 has the functions of small-deformation automatic reset and large-deformation mutual blocking; a plurality of limit grooves 11-1 matched with the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 are respectively arranged on two sides of the lifting groove 11, an extrusion groove 11-2 used for folding the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 is arranged on the top of the lifting groove 11, and a bulge 11-3 used for expanding the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 is arranged at the bottom of the lifting groove 11.

In actual work, the lifting slide block 7 is pulled upwards, so that the lifting limiting swing piece can be matched with different limiting grooves 11-1, and lifting limiting is realized; when the lifting slide block 7 rises to the highest position, the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 are folded under the extrusion action of the extrusion groove 11-2 and then separated from the limit groove 11-1, so that the lifting slide block can smoothly fall to the lowest position, and the first lifting limit swing part 10-1 and the second lifting limit swing part 10-2 are separated again under the action of the bulge 11-3.

In this embodiment, the supporting member 10-4 is preferably composed of an arc-shaped protrusion and an arc-shaped groove which are mutually matched, and the opening of the arc-shaped groove is smaller than the maximum size of the arc-shaped protrusion. Thus, when small extrusion exists between the two, the two can be automatically reset (in the process of ascending adjustment), and when large deformation exists between the two, the arc-shaped bulge is clamped into the arc-shaped groove to realize clamping (ascending to the topmost part). Obviously, in some embodiments, the support member may be composed of a spring and a damping buckle, the spring is used for realizing expansion and reset in the process of lifting adjustment, the damping buckle is used for realizing dead locking after reaching the top, a similar effect can be achieved, only two parts are needed, and the structure is more complex.

It should be noted that the positions of the lifting limit swing element and the lifting slot can be inter-modulated, for example, the lifting limit swing element is disposed on the connecting bracket 1, and the lifting slot is disposed on the lifting slider 7, so as to achieve similar technical effects.

In some embodiments, the lifting slider may also be omitted, as may the corresponding lifting function.

Example 2.

A seat comprising a seat pan on which is mounted a seat back bracket as in embodiment 1.

The present embodiment provides a seat having all the technical effects of embodiment 1, and the description thereof is omitted here.

In some embodiments, the chair back support is further provided with a movable chair handle to be matched with different users for use.

It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the utility model is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the utility model as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims (10)

1. A chair back bracket, comprising: the seat comprises a connecting bracket used for connecting a seat chassis, and a waist rest, a backrest and a headrest which are arranged on the connecting bracket; the backrest is characterized by comprising a left back frame and a right back frame which can swing inside and outside, the inner end of each back frame is rotatably connected with the connecting support through a rotating shaft, and the outer end of each back frame is connected with the connecting support through an elastic support.

2. The chair back bracket as claimed in claim 1, wherein the left and right back frames are identical in structure and are symmetrically arranged.

3. The chair back support as claimed in claim 1, wherein corresponding elastic supports are respectively provided for the left and right back frames, and the two elastic supports are symmetrically arranged and are both frame structures.

4. The chair back bracket as claimed in claim 1, wherein a lifting slider is mounted on the connecting bracket, and the waist rest, the backrest and the headrest are connected with the lifting slider and are lifted and lowered together with the lifting slider; the rotating shaft and the elastic support are arranged on the lifting slide block.

5. The chair back support of claim 4, wherein the lifting slide is further provided with a clothes hanger, and the headrest and the clothes hanger form a height-adjustable lifting installation.

6. The chair back support according to claim 1, wherein an elastic support frame is provided corresponding to the lumbar support, the upper side of the lumbar support is rotatably connected, and a spring is provided at the lower side of the lumbar support.

7. The chair back bracket as claimed in claim 4, wherein the lifting adjustment structure between the lifting slider and the connecting bracket is: one of the lifting slide block and the connecting bracket is provided with a lifting groove, and the other one is provided with a lifting limiting piece;

the lifting limiting part comprises a first lifting limiting swing part and a second lifting limiting swing part, the upper ends of the first lifting limiting swing part and the second lifting limiting swing part are rotatably connected with the same swing shaft, the lower ends of the first lifting limiting swing part and the second lifting limiting swing part form an opening structure through a supporting part, and the supporting part has the functions of small-deformation automatic reset and large-deformation mutual blocking;

the both sides in lift groove are equipped with a plurality ofly respectively with state first lift limit goods of furniture for display rather than for use and the spacing goods of furniture for display rather than for use complex spacing groove of second lift limit goods of furniture for display rather than for use the top in lift groove be equipped with the spacing goods of furniture for display rather than for use of first lift with the extrusion groove that the spacing goods of furniture for display rather than for use of second lift was drawn in the bottom in lift groove is equipped with the arch with the spacing goods of furniture for display rather than for use of first lift with the spacing goods of furniture for display rather than for use of second lift struts.

8. The chair back bracket of claim 7, wherein the support member is formed by a mating arcuate projection and arcuate recess, the arcuate recess having an opening smaller than the maximum dimension of the arcuate projection.

9. The chair back bracket as claimed in claim 1, wherein the waist rest, the backrest and the headrest are all of a structure in which inner and outer frames are fastened together, and the inner and outer frames are fixed by screws or fasteners.

10. A seat comprising a seat pan, wherein a seat back bracket as claimed in any one of claims 1 to 9 is mounted on the seat pan.

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