CN216364391U - High-applicability waist and back supporting assembly - Google Patents

Abstract

The utility model discloses a high-applicability waist and back support assembly, which comprises a back support and a back support, wherein the back support is configured to support a main body of the back support, the back support is configured to support the waist and the back of a human body, the back support comprises an upper back assembly and a lower back assembly which are separated from each other up and down, the upper back assembly is arranged on the back support and is configured to support the back of the human body, and the upper part of the lower back assembly is rotatably connected to the back support and is configured to support the waist of the human body; the lower back component is configured to be capable of lifting the position of supporting the waist of a human body through relative rotation with the back bracket; the back support comprises a lifting adjusting mechanism, the upper back assembly is arranged on the lifting adjusting mechanism, and the lifting adjusting mechanism is configured to support the upper back assembly to stay at a lifted position so as to lift the position of the upper back assembly supporting the back of the human body; compared with the prior art, the upper back assembly and the lower back assembly are lifted to adapt to different height crowds, so that the different height crowds can be supported by the proper back and the waist, and the comfort is improved.

Description

High-applicability waist and back supporting assembly

Technical Field

The utility model relates to the field of office furniture, in particular to a high-applicability waist and back support assembly.

Background

With the continuous development of the current society, more and more workers work in the indoor office, and the time of the seat accompanying people is longer and longer; different crowds often also are different to the requirement of seat, and can adapt to the seat of individual requirement, and its travelling comfort is also better to the crowd that the difference risees for example, the height of the back of the chair will influence the support condition at human back, and to the crowd that the height is higher, the back of the chair height also because of higher, just so can make the back of the chair can enough support its back of the waist completely, increase and use the travelling comfort.

In the existing chair, the chair seat and the chair back are always lifted synchronously, and the chair back cannot be lifted independently, so that the chair can only adapt to the placement of legs of a human body and cannot adapt to the support of the waist and the back of the human body; nowadays, partial chair back lifting chairs are gradually appeared, which are generally used for adjusting the lumbar support height and position in the chair back to realize the waist support effect, such as the Chinese patent invention CN 201280054034.8, but they can not support the lumbar back of people with different heights.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a high-applicability waist and back support assembly, which is characterized in that a back support member is divided into an upper back assembly and a lower back assembly, the upper back assembly is lifted through a lifting adjusting mechanism, and the lower back assembly can deflect upwards or downwards to realize the lifting of the waist and back support position, so that the high-applicability waist and back support assembly is suitable for people with different heights.

The technical scheme of the utility model is realized as follows:

a high-serviceability lumbar support assembly comprising:

a back bracket configured to support a body of the back support;

a back support configured to support a human lumbar back; the back support comprises an upper back component and a lower back component which are separated up and down, the upper back component is arranged on the back support and is configured to support the back of a human body, and the upper part of the lower back component is rotatably connected to the back support and is configured to support the waist of the human body; the lower back component is configured to be capable of lifting the position of supporting the waist of a human body through relative rotation with the back bracket;

the back support comprises a lifting adjusting mechanism, the upper back component is arranged on the lifting adjusting mechanism, and the lifting adjusting mechanism is configured to support the upper back component to stay at the lifted position, so that the upper back component can lift the position of supporting the back of a human body.

The upper back component and the lower back component are lifted to adapt to people with different heights, so that the people with different heights can be supported by the back and the waist properly, and the comfort is improved; the rotation of the lower back component can not only lift the position for supporting the waist of a human body, but also realize the adjustment of the seat depth; after the upper back assembly rises, the distance between the lower back assembly and the upper back assembly is increased, the upper back assembly cannot interfere the rotation of the lower back assembly, the waist jacking stroke of the lower back assembly is larger, and the limit position of seat depth adjustment is increased.

Preferably, the upper back component is arranged above the lower back component, and the whole lower back component protrudes forwards; when the lower back component rotates close to the upper back component, the whole lower back component deflects forwards and upwards; when the upper back component rises and the lower back component deflects forwards and upwards, the position of the back support part for supporting the waist and the back of the human body rises. Because the rotating points of the upper back component and the back support are positioned at the upper part of the lower back component, when the lower back component is close to the upper back component to rotate, the supporting surface of the lower back component to the waist of the human body can also rise to adapt to higher people.

Preferably, the lower back assembly is a profiled frame which is integrally convex forward in the vertical direction and integrally concave rearward in the horizontal direction. The whole forward arch of back of the body subassembly down, and the molding of heterotypic frame makes its holding surface to human waist be the curved surface, and the contrast straight frame is high higher, and back of the body subassembly lower extreme can not too preceding protruding down, influences the travelling comfort that supports.

Preferably, the upper part of the lower back assembly is provided with a first connecting lug, the upper part of the back support is provided with a rotating seat, and the first connecting lug is rotatably connected with the rotating seat through a rotating shaft; the distance from the rotary connecting point of the back bracket and the lower back component to the foremost end of the lower back component is 10-15 cm. The pivot point of back of body subassembly is leaned on the back down, and the whole forward arch of back of body subassembly, holding surface are the curved surface down moreover, and this makes the high scope of deflection when back of body subassembly rotates bigger down to adapt to different height crowds.

Preferably, the lifting adjusting mechanism comprises a lifting frame and a lifting adjusting assembly, the lifting frame is arranged on the back support in a lifting manner, and the lifting adjusting assembly is arranged between the back support and the lifting frame; the lifting adjusting component is configured to be a lifting frame and a back support which move relatively, and the lifting adjusting component is used for positioning and supporting the lifting frame.

Preferably, the lifting adjusting assembly comprises a gear piece and a hanging piece, and the hanging piece is in sliding fit with the gear piece; the gear part is provided with a plurality of clamping grooves distributed along the sliding direction, the engaging gear part comprises clamping pins which are matched with the clamping grooves in a clamping manner and have elasticity, and when the engaging gear part and the gear part slide relatively, the clamping pins switch positions among the clamping grooves.

Preferably, the gear engaging piece further comprises a base, a rotating seat, a jacking seat, a working spring and a locking spring, wherein the two end faces of the base are respectively provided with an accommodating groove and an opening, the openings face the clamping groove, the accommodating groove is communicated with the openings, and the clamping pins are slidably arranged in the openings and do telescopic motion; the rotating seat and the jacking seat are both arranged in the accommodating groove, the jacking seat is closer to the opening than the rotating seat, the jacking seat is arranged on the bayonet lock, and two ends of the locking spring are respectively abutted against the jacking seat and the bottom surface of the accommodating groove; the working spring acts on the rotating seat and enables the rotating seat to be close to the jacking seat; the rotating seat and the jacking seat are matched through the inclined plane, so that the rotating seat can rotate after the jacking seat jacks the rotating seat.

Preferably, at least one guide groove and at least one locking groove are arranged on the inner wall of the accommodating groove, and the guide groove and the locking groove are arranged adjacent to each other along the circumferential direction; the jacking seat is provided with a guide block, the guide block is arranged in the guide groove, and the guide block slides in the guide groove along with the movement of the clamping pin; the rotary seat is provided with a state switching tooth, the state switching tooth is switched between the guide groove and the locking groove along with the rotation of the rotary seat, and the guide groove or the locking groove limits the rotation of the rotary seat when the state switching tooth is positioned in the guide groove or the locking groove; when the state switching teeth enter the guide grooves, the state switching assembly is in a working position, the elastic force of the working spring is applied to the jacking seat through the rotating seat and resists the elastic force of the locking spring to enable the whole clamping pin to be subjected to the elastic force towards the clamping groove; when the state switching teeth enter the locking groove, the state switching assembly is in the locking position, the elastic force of the working spring is applied to the locking groove, and the clamping pin leaves the clamping groove under the elastic force of the locking spring.

Preferably, the back support is provided with a substantially vertical mounting groove, a notch of the mounting groove is located on the upper surface of the back support, the blocking piece is substantially vertically arranged in the mounting groove, the engaging piece is arranged on the lower portion of the lifting frame, and the lower portion of the lifting frame is inserted into the mounting groove and lifted along the groove depth direction of the mounting groove.

Preferably, the back support device further comprises a support adjusting assembly, the support adjusting assembly is arranged between the back support and the lower back assembly, two ends of the support adjusting assembly are respectively connected with the back support and the lower part of the lower back assembly in a rotating mode, and the support adjusting assembly is configured to support and stop the lower back assembly at a corresponding position after the lower back assembly rotates.

Preferably, the back support is a substantially L-shaped plate-shaped body, and comprises a vertical plate and a horizontal plate, and the horizontal plate is used for connecting the seat; the upper part of the lower back component is provided with a first connecting lug, the upper part of the vertical plate is provided with a rotating seat, and the first connecting lug is rotatably connected with the rotating seat through a rotating shaft; the lower back of the body subassembly lower part is equipped with the second engaging lug, the one end rotation of supporting adjusting part is connected in the riser lower part, and the other end and the second engaging lug of supporting adjusting part rotate to be connected. When the lower back assembly rotates, the support adjusting assembly and the back bracket and the lower back assembly also rotate relatively, so that the support adjusting assembly and the back bracket need to be connected with the lower back assembly in a rotating way.

Preferably, the supporting and adjusting assembly can be any one of an electric push rod, an air rod or a hydraulic rod, two ends of the supporting and adjusting assembly are respectively connected with the back support and the lower back assembly in a rotating manner, and the inclination angle of the supporting and adjusting assembly relative to the horizontal plane changes along with the deflection motion of the lower back assembly. The common and universal accessories such as the electric push rod, the air rod or the hydraulic cylinder are used as the supporting and adjusting component, so that the development cost is saved, and the function of the supporting and adjusting component can be realized.

Preferably, the supporting and adjusting assembly is inclined upwards between the back support and the back support piece from back to front, and when the lower end of the back support piece moves forwards, the included angle between the whole supporting and adjusting assembly and the horizontal plane is reduced.

The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:

the utility model provides a high-applicability lumbar-back support assembly, compared with the prior art:

1. go up, down back of the body subassembly go up and down in order to adapt to different height crowds for different height crowds homoenergetic receive suitable back support and lumbar support, promote the travelling comfort.

2. The rotation of the lower back component can not only lift the position for supporting the waist of a human body, but also realize the adjustment of the seat depth.

3. After the upper back assembly rises, the distance between the lower back assembly and the upper back assembly is increased, the upper back assembly cannot interfere the rotation of the lower back assembly, the waist jacking stroke of the lower back assembly is larger, and the limit position of seat depth adjustment is increased.

3. Support adjustment mechanism and be close to the human body, it is convenient to adjust, when using gas pole, electric putter or hydraulic stem, only need press the button can, need not to twist complicated operations such as bolt.

4. The whole lower back component protrudes forwards, the supporting surface of the special-shaped frame for the waist of the human body is a curved surface due to the shape of the special-shaped frame, compared with a straight frame, the lifting height is higher, and the lower end of the lower back component is not excessively convex forwards, so that the supporting comfort is not influenced; the pivot point of back of body subassembly is leaned on the back down, and the whole forward arch of back of body subassembly, holding surface are the curved surface down moreover, and this makes the high scope of deflection when back of body subassembly rotates bigger down to adapt to different height crowds.

5. The supporting and adjusting assembly is inclined upwards between the back support and the back support piece from back to front, and when the lower end of the back support piece moves forwards, the included angle between the whole supporting and adjusting assembly and the horizontal plane is reduced; the effective supporting force of the supporting and adjusting assembly to the back supporting piece is larger, and the structure is more stable.

Drawings

FIG. 1 is a perspective view of the lumbar support assembly in an embodiment of the present invention;

FIG. 2 is a side view of the lumbar support height adjustment of the lumbar support assembly in an embodiment of the present invention;

FIG. 3 is a perspective view of a lower back assembly attached to a back support in an embodiment of the present invention;

FIG. 4 is a perspective view of the lower back assembly rotated on the back bracket in an embodiment of the present invention;

FIG. 5 is a perspective view of a lower back assembly attached to a back support in an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a support adjustment assembly according to an embodiment of the present invention;

FIG. 7 is a schematic perspective view of the embodiment of the present invention illustrating the engagement between the latch and the slot;

FIG. 8 is a cross-sectional view of the support adjustment assembly with the latch tongue in the primary slot in an embodiment of the present invention;

FIG. 9 is an enlarged view of portion B of FIG. 8;

FIG. 10 is a cross-sectional view of the support adjustment assembly with the latch engaging the slot in an embodiment of the present invention;

FIG. 11 is an enlarged view of portion C of FIG. 10;

FIG. 12 is a cross-sectional view of the support adjustment assembly after the locking tongue is locked by the limiting portion in an embodiment of the utility model;

FIG. 13 is an enlarged view of portion D of FIG. 12;

FIG. 14 is a cross-sectional view of a support adjustment assembly with the latch being set back by a surface of revolution in an embodiment of the utility model;

FIG. 15 is an enlarged view of section E of FIG. 14;

FIG. 16 is an exploded view of a first support adjustment assembly in an embodiment of the present invention;

FIG. 17 is an exploded view of a second support adjustment assembly in an embodiment of the present invention;

FIG. 18 is a first perspective view illustrating a rack and a second support base according to an embodiment of the present invention;

FIG. 19 is a second perspective view of the rack and the second support base according to the embodiment of the present invention;

fig. 20 is a schematic perspective view of the crane arranged on the back support in the embodiment of the utility model;

FIG. 21 is a schematic perspective view of the upper back assembly and the lifting frame according to the embodiment of the present invention;

FIG. 22 is a schematic perspective view of an embodiment of the present invention with mounting slots formed on a back bracket;

FIG. 23 is a schematic perspective view of the engagement of the catch member with the shift element in an embodiment of the present invention;

FIG. 24 is a schematic perspective view of a base and its internal structure in an embodiment of the utility model;

FIG. 25 is a schematic perspective view of the working spring and the locking spring relative to the latch in the embodiment of the present invention;

fig. 26 is a cross-sectional view of a flight in an embodiment of the utility model.

The figures are numbered: a back support 1; a vertical plate 11; a transverse plate 12; a rotating base 13; a back support 2; an upper back assembly 21; a lower back assembly 22; a first connection lug 221; a second engaging lug 222; a support adjustment assembly 101; a first support 102; a second support seat 103; a rack 104; a latch tongue 105; a card slot 106; a pivot 107; a torsion spring 108; a latch section 109; a latch 110; a self-locking face 111; a sliding surface 112; a tongue base 113; a locking tongue 114; an elastic sheet 115; a stopper portion 116; a latch jack-up retention section 117; a swivel boss 118; a jacking surface 119; a last stage card slot 120; a surface of revolution 121; a primary card slot 122; a first torsion arm 123; a second torque arm 124; a lifting adjusting mechanism 3; a lifting frame 301; a shift member 302; a hanging member 303; a catch groove 304; a click pin 305; a base 306; a rotary base 307; a jack-up stand 308; a working spring 309; a locking spring 310; a receiving groove 311; an opening 312; a mounting groove 313; a guide groove 314; a locking groove 315; a guide block 316; the state switching teeth 317.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. 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 than one 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 embodiment of the utility model is as follows:

as shown in fig. 1 and 2, the utility model provides a high-applicability lumbar-back support assembly, which comprises a back support 1 and a back support 2, wherein the back support 1 comprises a lifting adjusting mechanism 3.

The back support 1 is configured to support the body of the back support 2, and the back support 2 is configured to support the waist and back of a human body; the back support 2 comprises an upper back component 21 and a lower back component 22 which are separated up and down, the upper back component 21 is arranged on the back support 1, the upper part of the lower back component 22 is rotatably connected on the back support 1, the lower back component 22 is positioned below the upper back component 21, and back cushions or mesh cloth can be coated on the front sides of the upper back component 21 and the lower back component 22; the lower part of the upper back component 21 is connected with the upper part of the back support 1, specifically, the upper back component 21 is arranged on the lifting adjusting mechanism 3, and the lifting adjusting mechanism 3 is configured to support the upper back component 21 to stay at the lifted position, so that the position of the upper back component 21 for supporting the back of a human body is lifted; because the rotating connection point of the lower back component 22 and the back bracket 1 is positioned at the upper part of the lower back component 22, when the lower back component 22 rotates, the lower end of the lower back component 22 deflects forwards and upwards or backwards and downwards, thereby adjusting the seat depth and lifting the position for supporting the waist of a human body; the waist and back support assembly further comprises a support adjusting assembly 101, wherein the support adjusting assembly 101 is arranged between the back support 1 and the lower back assembly 22, and the support adjusting assembly 101 is connected to the lower part of the back support 1 and is configured to support the lower back assembly 22 to stay at a corresponding position after the support adjusting assembly 101 deflects forwards or backwards.

As shown in fig. 3-5, the back support 1 is a substantially L-shaped plate, and includes a vertical plate 11 for connecting a chair back assembly and a horizontal plate 12 for connecting a chair seat, the upper back assembly 21 is disposed on the upper end of the vertical plate 11, and the lower back assembly 22 is rotatably connected to the upper portion of the vertical plate 11; the upper part of the lower back component 22 is provided with two first connecting lugs 221 which are arranged at intervals, the upper part of the vertical plate 11 is provided with a rotating seat 13 which protrudes forwards, and when the lower back component 22 is installed with the back support 1, the rotating seat 13 enters between the two first connecting lugs 221 and is rotatably connected through a rotating shaft; the lower part of the lower back component 22 is provided with two second engaging lugs 222 which are arranged at intervals, one end of the supporting and adjusting component 101 is rotatably connected to the lower part of the vertical plate 11, and the other end of the supporting and adjusting component 101 enters between the two second engaging lugs 222 and is rotatably connected through a rotating shaft.

Because the rotation connection point of the lower back assembly 22 and the back support 1 is located on the upper portion of the lower back assembly 22, the motion track of the lower back assembly 22 actually deflects towards the upper front or towards the lower rear, the deflection of the lower back assembly 22 in the front and rear direction can be used for adjusting the seat depth, and the deflection in the up and down direction can adjust the waist supporting height, so that the seat depth adjustment is realized, and the waist height of people with different heights can be adapted.

The lower back assembly 22 can rotate relative to the back support 1, and then the support adjusting assembly 101 supports and keeps the lower back assembly 22 at a corresponding position after rotating, so that the adjustment of the lumbar support height and the seat depth can be realized; from back to front, support adjusting part 101 and be the slope of slant between back of the body support 1 and back of the body support piece 2, because the both ends that support adjusting part 101 respectively with back of the body support 1, lower back of the body subassembly 22 rotates and is connected, when back of the body subassembly 22 rotates for back of the body support 1, support adjusting part 101 along with to the inclination of horizontal plane changes, and when back of the body subassembly 22 deflects forward, support adjusting part 101 and reduce for the contained angle of horizontal plane, thereby make the effective holding power that supports adjusting part 101 to back of the body subassembly 22 down bigger, the structure is more firm.

The upper back assembly 21 is arranged above the lower back assembly 22, the lower back assembly 22 integrally protrudes forwards, and when the lower back assembly 22 rotates close to the upper back assembly 21, the lower back assembly 22 integrally deflects forwards and upwards; when the upper back assembly 21 is lifted and the lower back assembly 22 is deflected forward and upward, the position of the back support 2 supporting the waist and back of the human body is lifted; the shape of the lower back assembly 22 also has an effect on the comfort of the lumbar support, said lower back assembly 22 being an anisotropic frame that is generally convex forward in the vertical direction and generally concave rearward in the horizontal direction, as shown in fig. 3-5; such a configuration provides a higher rise height than a straight frame, and the lower end of the lower back assembly 22 does not bulge too far forward and may not irritate the user's waist, which is more comfortable; in addition, the distance from the rotating connection point of the back support 1 and the lower back assembly 22 to the foremost end of the lower back assembly 22 is 10-15cm, the rotating point of the lower back assembly 22 is back, the whole lower back assembly 22 protrudes forwards, and the supporting surface is a curved surface, so that the upward deflection height of the lower back assembly 22 is higher when the lower back assembly 22 rotates, and the lower back assembly is suitable for people with different heights.

As shown in fig. 20 to 26, the lifting adjusting mechanism 3 includes a lifting frame 301 and a lifting adjusting assembly, the upper back assembly is disposed on the lifting frame 301, the lifting frame 301 is disposed on the back support in a lifting manner, and the lifting adjusting assembly is disposed between the back support and the lifting frame 301; the lifting adjusting component is configured to position and support the lifting frame 301 after the lifting frame 301 and the back support move relatively.

Specifically, the lifting adjusting assembly comprises a gear 302 and a gear 303, and the gear 303 is in sliding fit with the gear 302; a plurality of gear grooves 304 distributed along the sliding direction are formed in the gear piece 302, the gear piece 303 comprises a bayonet pin 305 which is in clamping fit with the gear grooves 304 and has elasticity, and when the gear piece 303 and the gear piece 302 slide relatively, the bayonet pin 305 switches positions among the gear grooves 304; the hanging member 303 further includes a base 306, a rotating base 307, a jacking base 308, a working spring 309 and a locking spring 310, wherein two end faces of the base 306 are respectively provided with an accommodating groove 311 and an opening 312, the opening 312 is disposed toward the blocking groove 304, the accommodating groove 311 is communicated with the opening 312, and the bayonet pin 305 is slidably disposed in the opening 312 and performs telescopic movement; the rotating base 307 and the jacking base 308 are both arranged in the accommodating groove 311, the jacking base 308 is closer to the opening 312 than the rotating base 307, the jacking base 308 is arranged on the bayonet 305, and two ends of the locking spring 310 respectively abut against the bottom surfaces of the jacking base 308 and the accommodating groove 311; the working spring 309 acts on the rotating seat 307 and makes the rotating seat 307 close to the jacking seat 308; the rotating base 307 and the jack-up base 308 are engaged with each other by an inclined surface, so that the jack-up base 308 jacks up the rotating base 307, and then the rotating base 307 can rotate.

The back support is provided with a roughly vertical mounting groove 313, the notch of the mounting groove 313 is positioned on the upper surface of the back support, the gear piece 302 is roughly vertically arranged in the mounting groove 313, the gear engaging piece 303 is arranged at the lower part of the lifting frame 301, and the lower part of the lifting frame 301 is inserted into the mounting groove 313 and lifted along the groove depth direction of the mounting groove 313; at least one guide groove 314 and at least one locking groove 315 are arranged on the inner wall of the accommodating groove 311, and the guide groove 314 and the locking groove 315 are arranged adjacent to each other in the circumferential direction; the jacking seat 308 is provided with a guide block 316, the guide block 316 is arranged in the guide groove 314, and the guide block 316 slides in the guide groove 314 along with the movement of the bayonet 305; the rotating base 307 is provided with a state switching tooth 317, the state switching tooth 317 is switched between the guide groove 314 and the locking groove 315 along with the rotation of the rotating base 307, and the guide groove 314 or the locking groove 315 limits the rotation of the rotating base 307 when the state switching tooth 317 is positioned in the guide groove 314 or the locking groove 315; when the state switching teeth 317 enter the guide grooves 314, the state switching assembly is in the working position, the elastic force of the working spring 309 is exerted on the jacking seat 308 through the rotating seat 307 and the bayonet pin 305 is subjected to the elastic force towards the retaining groove 304 in a whole manner against the elastic force of the locking spring 310; when the state switching tooth 317 enters the locking groove 315, the state switching assembly is in the locking position, the elastic force of the operating spring 309 is applied to the locking groove 315, and the detent pin 305 is moved away from the catching groove 304 by the elastic force of the locking spring 310.

Since the electric push rod, the air rod and the hydraulic cylinder are all common, the case that the supporting and adjusting assembly 101 is an electric push rod, an air rod or a hydraulic rod is not illustrated in detail in this embodiment; in order to make the supporting and adjusting assembly 101 have a strong supporting force without on-off control, the supporting and adjusting assembly 101 is designed as follows:

as shown in fig. 2 and 6-19, the supporting and adjusting assembly 101 includes a first supporting seat 102 rotatably connected to the lower back assembly 22 and a second supporting seat 103 rotatably connected to the back frame 1, wherein the first supporting seat 102 and the second supporting seat 103 move relatively when the lower back assembly 22 rotates; the first supporting seat 102 is a hollow sleeve, the first supporting seat 102 is sleeved on the second supporting seat 103, and the supporting and adjusting assembly 101 moves in a telescopic manner when the lower back assembly 22 rotates; a clamping mechanism is arranged between the first supporting seat 102 and the second supporting seat 103, the clamping mechanism is configured to keep the positions of the first supporting seat 102 and the second supporting seat 103 after relative movement when the back supporting member 2 is opened forwards, the clamping mechanism comprises a rack 104, a clamping tongue 105 and a spring, a plurality of clamping grooves 106 are distributed on the rack 104 along the length direction, and the clamping tongue 105 rotates around a pivot 107 and keeps the trend of clamping with the clamping grooves 106 under the action of the spring; the spring is a torsion spring 108; the latch mechanism mainly functions to enable the support adjustment assembly 101 to have a self-locking capability for supporting the lower back assembly 22 when the lower back assembly 22 leans back on the lower back assembly 22, but the latch mechanism does not have a self-locking capability for the support adjustment assembly 101 when the lower back assembly 22 deflects forward.

The rack 104 is installed in the first support seat 102 and comprises a latch section 109, a plurality of latches 110 are distributed on the latch section 109 along the length direction, a slot 106 is formed between every two latches 110, the latches 110 are right-angled trapezoidal, each latch 110 comprises a sliding surface 112 and a self-locking surface 111 perpendicular to the relative movement direction of the first support seat and the second support seat, the sliding surface 112 on the same latch 110 is inclined relative to the self-locking surface 111, an included angle between the two is an acute angle, and the sliding surface 112 is closer to the lower back component 22 relative to the self-locking surface 111; the latch 105 is in a triangular prism shape and comprises a tip 129, the tip 129 of the latch 105 is clamped in the slot 106 and is in clamping fit with the slot 106, when the waist and back leans back on the lower back assembly 22, the supporting and adjusting assembly 101 has a contraction tendency, that is, the first supporting seat 102 has a tendency of moving backwards relative to the second supporting seat 103, at the moment, the self-locking surface 111 abuts against the tip 129 of the latch 105, and the latch 105 prevents the first supporting seat 103 from moving backwards, that is, self-locking of the supporting and adjusting assembly 101 during contraction is completed; when the lower back assembly 22 is pulled to open by one stage, the supporting and adjusting assembly 101 extends by one stage, that is, the first supporting seat 102 moves forward by one stage relative to the second supporting seat 103, and in the process, the sliding surface 112 slides relative to the latch 105 until the latch 105 is latched into the next latch groove 106; each stage of the lower back assembly 22 opening corresponds to one card slot 106.

The clamping mechanism further comprises a tongue seat 113 and a limiting piece, the clamping tongue 105 is connected to the tongue seat 113, the tongue seat 113 is sleeved on the pivot 107, the tongue seat 113, the clamping tongue 105 and the torsion spring 108 are arranged on the second support seat 103, the torsion spring 108 is sleeved on the pivot 107, the first torsion arm 123 of the torsion spring 108 and the second support seat 103 are kept relatively fixed, and the second torsion arm 124 of the torsion spring 108 acts on the tongue seat 113, so that the tongue seat 113 can be restored to an initial position after rotating around the pivot 107; the tongue base 113 is also provided with a locking tongue 114 matched with the limiting piece, the locking tongue 114, the tongue base 113 and the clamping tongue 105 are integrally formed, and an included angle of 130 degrees is formed between the locking tongue 114 and the clamping tongue 105; the limiting member is a plate-shaped elastic sheet 115 fixed on the second support body, the elastic sheet 115 and the locking tongue 114 are always staggered, and one end of the elastic sheet 115 is suspended to form a limiting part 116 matched with the locking tongue 114.

Along the length direction, the rack 104 is respectively provided with a clamping tongue jacking and holding section 117 and a rotary boss 118 at two ends of the clamping tooth section 109; along the thickness direction of the rack 104, the heights of the clamping tongue jacking and holding section 117 and the rotary boss 118 are both greater than the height of the clamping tooth section 109, and the height of the rotary boss 118 is greater than the height of the clamping tongue jacking and holding section 117; the latch jacking and holding section 117 comprises a jacking surface 119 parallel to the sliding surface 112, and a final clamping groove 120 is formed between the jacking surface 119 and the last clamping tooth of the clamping tooth section 109; the rotary boss 118 comprises a rotary surface 121 parallel to the self-locking surface 111, and a primary clamping groove 122 is formed between the rotary surface 121 and the first clamping tooth of the clamping tooth section 109; when the latch tongue 105 is located on the latch section 109, the latch tongue 105 is in clamping fit with the corresponding position of the latch groove 106, and the limiting part 116 of the elastic sheet 115 does not limit the locking tongue 114; when the tip 129 of the latch tongue 105 relatively moves backwards from the last-stage card slot 120, the tip 129 abuts against the jacking surface 119 of the latch tongue jacking and holding section 117 to enable the latch tongue 105 to rotate towards the direction away from the card slot 106, the locking tongue 114 rotates along with the latch tongue 105, passes over the limiting part 116 of the elastic sheet 115 and abuts against the limiting part 116 to be locked, and the latch tongue 105 is enabled to keep the unlocking state of being disengaged from the card slot 106; at this time, the tip 129 of the latch 105 crosses over the latch section 109 when the support adjusting assembly 101 contracts, the tip 129 of the latch 105 touches the revolution surface 121 of the revolution boss 118, the latch 105 is urged to rotate reversely to be latched with the primary latch groove 122, and the locking latch 114 also rotates reversely to pass through the elastic piece 115 and disengage from the limiting part 116 of the elastic piece 115.

The supporting and adjusting mechanism is close to a human body, and is convenient to adjust, and the waist and back supporting and adjusting can be carried out only by pulling the lower back component 22 because the supporting and adjusting mechanism has the self-locking capability in the contraction direction and has no self-locking in the extension direction.

As shown in fig. 3 and 4, a space is always left between the lower end of the lower back assembly 22 and the back support 1, the width of the back support 2 is larger than that of the back support 1, and the support adjusting assembly 101 is arranged at the middle position along the width direction of the back support 2, so that the appearance is beautiful and unobtrusive, and the user can lean more comfortably.

Claims (13)

1. A high-serviceability lumbar support assembly, comprising:

a back bracket configured to support a body of the back support;

a back support configured to support a human lumbar back; the back support comprises an upper back component and a lower back component which are separated up and down, the upper back component is arranged on the back support and is configured to support the back of a human body, and the upper part of the lower back component is rotatably connected to the back support and is configured to support the waist of the human body; the lower back component is configured to be capable of lifting the position of supporting the waist of a human body through relative rotation with the back bracket;

the back support comprises a lifting adjusting mechanism, the upper back component is arranged on the lifting adjusting mechanism, and the lifting adjusting mechanism is configured to support the upper back component to stay at the lifted position, so that the upper back component can lift the position of supporting the back of a human body.

2. The high serviceability lumbar support assembly of claim 1 further comprising: the upper back component is arranged above the lower back component, and the whole lower back component is convex forwards; when the lower back component rotates close to the upper back component, the whole lower back component deflects forwards and upwards; when the upper back component rises and the lower back component deflects forwards and upwards, the position of the back support part for supporting the waist and the back of the human body rises.

3. The high serviceability lumbar support assembly of claim 2 further comprising: the lower back component is a special-shaped frame which is integrally protruded forwards in the vertical direction and integrally sunken backwards in the horizontal direction.

4. The high serviceability lumbar support assembly of claim 2 further comprising: the upper part of the lower back component is provided with a first connecting lug, the upper part of the back support is provided with a rotating seat, and the first connecting lug is rotatably connected with the rotating seat through a rotating shaft; the distance from the rotary connecting point of the back bracket and the lower back component to the foremost end of the lower back component is 10-15 cm.

5. The high serviceability lumbar support assembly of claim 1 further comprising: the lifting adjusting mechanism comprises a lifting frame and a lifting adjusting assembly, the upper back assembly is arranged on the lifting frame, the lifting frame is arranged on the back support in a lifting manner, and the lifting adjusting assembly is arranged between the back support and the lifting frame; the lifting adjusting component is configured to be a lifting frame and a back support which move relatively, and the lifting adjusting component is used for positioning and supporting the lifting frame.

6. The high serviceability lumbar support assembly of claim 5, further comprising: the lifting adjusting assembly comprises a gear piece and a hanging piece, and the hanging piece is in sliding fit with the gear piece; the gear piece is provided with a plurality of gear grooves distributed along the sliding direction, the engaging gear piece comprises a bayonet lock which is in clamping fit with the gear grooves and has elasticity, and when the engaging gear piece and the gear piece slide relatively, the bayonet lock switches positions between the gear grooves.

7. The high serviceability lumbar support assembly of claim 6, further comprising: the hanging stopper also comprises a base, a rotating seat, a jacking seat, a working spring and a locking spring, wherein two end faces of the base are respectively provided with a containing groove and an opening, the opening is arranged towards the stopping groove, the containing groove is communicated with the opening, and the bayonet lock is arranged in the opening in a sliding manner and does telescopic motion; the rotating seat and the jacking seat are both arranged in the accommodating groove, the jacking seat is closer to the opening than the rotating seat, the jacking seat is arranged on the bayonet lock, and two ends of the locking spring are respectively abutted against the jacking seat and the bottom surface of the accommodating groove; the working spring acts on the rotating seat and enables the rotating seat to be close to the jacking seat; the rotating seat and the jacking seat are matched through the inclined plane, so that the rotating seat can rotate after the jacking seat jacks the rotating seat.

8. The high serviceability lumbar support assembly of claim 7, further comprising: the inner wall of the accommodating groove is provided with at least one guide groove and at least one locking groove, and the guide groove and the locking groove are arranged adjacently along the circumferential direction; the jacking seat is provided with a guide block, the guide block is arranged in the guide groove, and the guide block slides in the guide groove along with the movement of the clamping pin; the rotary seat is provided with a state switching tooth, the state switching tooth is switched between the guide groove and the locking groove along with the rotation of the rotary seat, and the guide groove or the locking groove limits the rotation of the rotary seat when the state switching tooth is positioned in the guide groove or the locking groove; when the state switching teeth enter the guide grooves, the state switching assembly is in a working position, the elastic force of the working spring is applied to the jacking seat through the rotating seat and resists the elastic force of the locking spring to enable the whole bayonet lock to be subjected to the elastic force towards the retaining groove; when the state switching teeth enter the locking groove, the state switching assembly is in the locking position, the elastic force of the working spring is applied to the locking groove, and the bayonet lock leaves the gear groove under the elastic force of the locking spring.

9. The high serviceability lumbar support assembly of claim 6, further comprising: the back support seted up roughly vertical mounting groove, the notch of mounting groove is located back support upper surface, fender position spare roughly vertical setting in the mounting groove, the setting of putting into gear is in the crane lower part, the crane lower part inserts in the mounting groove and goes up and down along the groove depth direction of mounting groove.

10. The high serviceability lumbar support assembly of claim 1 further comprising: the back support and the lower back assembly are rotatably connected with the lower part of the back support and the lower back assembly respectively, and the support and adjustment assembly is configured to rotate the lower back assembly and then supports the lower back assembly to stay at the corresponding position.

11. The high serviceability lumbar support assembly of claim 10, further comprising: the back support is a plate-shaped body which is approximately L-shaped and comprises a vertical plate and a transverse plate, and the transverse plate is used for connecting the chair seat; the upper part of the lower back component is provided with a first connecting lug, the upper part of the vertical plate is provided with a rotating seat, and the first connecting lug is rotatably connected with the rotating seat through a rotating shaft; the lower back of the body subassembly lower part is equipped with the second engaging lug, the one end rotation of supporting adjusting part is connected in the riser lower part, and the other end and the second engaging lug of supporting adjusting part rotate to be connected.

12. The high serviceability lumbar support assembly of claim 10, further comprising: the support adjusting component can be any one of an electric push rod, an air rod or a hydraulic rod, two ends of the support adjusting component are respectively connected with the back support and the lower back component in a rotating mode, and the inclination angle of the support adjusting component relative to the horizontal plane changes along with the deflection motion of the lower back component.

13. The high serviceability lumbar support assembly of claim 10, further comprising: from back to front, support the adjusting part and be the slope of ramp up between back of the body support piece and back support piece, when back support piece lower extreme moved forward, support the whole contained angle with the horizontal plane of adjusting part and diminish.

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