CN114009992A - Waist leans on degree of depth adjusting device - Google Patents
Waist leans on degree of depth adjusting device Download PDFInfo
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- CN114009992A CN114009992A CN202111293424.8A CN202111293424A CN114009992A CN 114009992 A CN114009992 A CN 114009992A CN 202111293424 A CN202111293424 A CN 202111293424A CN 114009992 A CN114009992 A CN 114009992A
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- 230000008093 supporting effect Effects 0.000 claims abstract description 74
- 230000009471 action Effects 0.000 claims abstract description 12
- 230000004044 response Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 11
- 230000007306 turnover Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The invention discloses a waist rest depth adjusting device, which comprises: the waist rest body is rotatably connected to the back bracket; the supporting component is longitudinally arranged between the waist rest body and the back support and comprises a matching part and an elastic part; the supporting component correspondingly slides up and down along the back bracket in response to the rotation action of the waist rest body; and at least two positioning holes are arranged on the matching part; the adjusting assembly is arranged beside the supporting part; the adjusting assembly comprises a locking piece connected to the back bracket and a control handle for controlling the locking piece to move transversely; a locking pin which is in inserted fit with the positioning hole is formed on the locking piece; when the locking pin is separated from the positioning hole, the lumbar support body rotates forwards and backwards and drives the supporting part to move up and down so as to adjust the initial position of the lumbar support body; the locking pin is inserted into the positioning hole at the corresponding position to fix the initial position of the lumbar support body; when the lumbar support body is at different initial positions and is subjected to backward acting force, the elastic part is promoted to deform so as to elastically support the lumbar support body.
Description
Technical Field
The invention relates to the field of seats, in particular to a waist rest depth adjusting device.
Background
Sub-health is always a living problem concerned by people, wherein lumbar vertebra problems brought by people due to long-time sitting are particularly frequent, while a chair is used as daily furniture for people to work and study, under the condition of long-time sitting and working, the spine of a human body is naturally bent, particularly the bending at the lumbar vertebra is more important, the lumbar vertebra is easily bent outwards when the chair is in a sitting posture for a long time, and isosceles vertebra diseases of lumbar disc herniation are easily caused after long-time sitting. As is well known, the spine of a human body is S-shaped, and therefore, a waist rest is additionally arranged at the backrest of part of office chairs to play a role of supporting the waist, so that the natural bending part of the lumbar vertebra is supported, the outward bending of the lumbar vertebra due to fatigue is prevented, and the lumbar vertebra health of office staff is guaranteed.
In practical application, however, different people have different requirements on the waist support; for a long-sitting office worker, the waist support is required to be capable of leaning forward to fit the waist, so that the waist supporting effect is achieved; for a user who sits on the chair to relax and take a rest, the waist rest needs to be slightly loosened, and the obvious waist supporting function is not needed;
the existing chair with the waist support capable of being adjusted in front-back depth can provide support for the waist of a user through front-back adjustment of the waist support so as to meet different use requirements. But the waist on current market leans on adjusting device to adopt worm gear or the mode of acting as go-between to adjust the waist more, and the operation is wasted time and energy, often needs rotatory many circles or great power operation just can carry out the front and back regulation that the waist leaned on, and the operation is very inconvenient, and user experience is poor.
Furthermore, the existing waist support adjustment is to lock the waist support at a certain position in front and at the back so as to achieve the effect of adjusting the waist supporting degree; the waist rest is in a complete locking state, or the waist rest can only be mechanically rotated and adjusted around a certain fulcrum; this results in a lumbar support that is too stiff for the user to use. Some existing lumbar supports can elastically deflect by arranging the lumbar support, so that a self-adaptive adjusting function is realized; but this does not allow the adjustment of the front and back position of the lumbar support.
Chinese utility model patent of CN201711320666.5 discloses "a waist leans on adjustment mechanism", including the waist leans on, the support frame, still includes: the mounting seat is fixedly arranged on the support frame, and a first mounting groove is formed in the mounting seat; the turnover support comprises a first support and a turnover plate arranged at the rear end of the first support, the turnover plate is arranged in the first mounting groove, one of the upper end and the lower end of the turnover plate rotates around the first mounting groove, and the front end of the first support is connected with the waist rest; the adjusting block is arranged in the first mounting groove, and the waist rest can be adjusted forwards and backwards by adjusting the rotating angle of the turnover support through sliding the adjusting block up and down; the mounting cover plate covers the outer side of the turnover plate and is fixedly connected with the mounting seat, and the first support penetrates through the mounting cover plate. The position of the waist back front and back is changed by turning the support to rotate, the structure is simple, the operation is convenient, and the adjustment of the position of the waist back front and back can be completed by sliding the adjusting block up and down. Although the adjusting mechanism can adjust the front and back positions of the waist rest, the waist rest is completely locked at a certain position, so that the waist rest is stiff during use and cannot be adjusted in a self-adaptive manner.
Disclosure of Invention
The invention overcomes the defects in the prior art and aims to provide the lumbar support depth adjusting device which has an ingenious structure and is convenient to adjust and operate; before the waist support is used by a user, the initial position of the waist support body can be adjusted in advance according to the self requirement; the waist support body is in the ejection position or the retreat position to adjust the waist supporting degree. In addition, when the user sits on and leans against the lumbar support body after the initial position of the lumbar support body is adjusted, the lumbar support body can still elastically deflect within a certain range due to the elasticity of the supporting part, and therefore the self-adaptive function of the lumbar support body is achieved.
The technical scheme of the invention is realized as follows:
a lumbar support depth adjustment device comprising: the waist rest body is rotatably connected to the back bracket; the waist rest body can rotate back and forth around the back support; the supporting component is longitudinally arranged between the waist rest body and the back support and comprises a matching part at the bottom and a vertical elastic part with elasticity; the matching part is in sliding fit with the back support along the vertical direction, and the upper end of the elastic part is connected with the waist rest body; the supporting component correspondingly slides up and down along the back bracket in response to the back-and-forth rotation action of the waist rest body; and at least two positioning holes which are spaced up and down are arranged on the matching part; the adjusting assembly is arranged beside the supporting part; the adjusting assembly comprises a locking piece connected to the back bracket and a control handle for controlling the locking piece to move transversely; a locking pin which is in inserted fit with the positioning hole is formed on the locking piece; when the locking pin is separated from the positioning hole, the lumbar support body rotates forwards and backwards and drives the supporting part to move up and down so as to adjust the initial position of the lumbar support body; the locking pin is inserted into the positioning hole at the corresponding position to fix the initial position of the lumbar support body; when the lumbar support body is at different initial positions and is subjected to backward acting force, the elastic part is promoted to deform so as to elastically support the lumbar support body.
Preferably, a longitudinal sliding support seat is arranged at the middle position of the lower part of the back support, and the matching part is in sliding fit with the sliding support seat. The cooperation portion corresponds the fore-and-aft rotation action of waist by the body along the vertical slip of sliding support seat, and sliding support seat can vertically set up on back of the body support for it is reasonable to lay in the space on the back of the body support, and is more frivolous around. If the support member is arranged to move forward and backward, a movement space in the forward and backward direction needs to be reserved on the back support, so that the back support is thicker and heavier.
Preferably, the back surface of the matching part is arc-shaped, the sliding support seat and the sliding contact surface of the matching part are correspondingly arranged into arc-shaped surfaces, and the arc-shaped surfaces on the sliding support seat are bent towards the front upper part from bottom to top; so that the waist rest body moves forwards simultaneously in the process that the supporting component moves upwards along the sliding supporting seat. The linkage feedback between the movement of the supporting part and the rotation of the lumbar support body is more obvious.
Preferably, the elastic part is a supporting elastic sheet which extends upwards from the matching part, and the supporting elastic sheet is an arc-shaped body with the middle position protruding forwards. When making the waist lean on the body to rotate backward and extrude the support shell fragment, support the shell fragment and will take place the deformation of certain degree so that cooperation portion has the trend of downstream in vertical direction.
Preferably, the upper end of the elastic part is in clamping fit with the waist rest body, the upper end of the waist rest body is provided with a bayonet, and the upper end of the elastic part is correspondingly provided with an elastic clamping tongue and a clamping block which are spaced up and down; the upper end of the elastic part penetrates out of the bayonet upwards and the elastic clamping tongue is clamped outside the bayonet, and the elastic clamping tongue and the clamping block limit the upper end of the elastic part and the waist rest body to be relatively fixed in the vertical direction. The clamping fit is adopted, and the connection is convenient and quick; and the stress is prevented from being too concentrated when the bending deformation is carried out; if the screw connection is adopted, the stress is concentrated on one point, so that the elastic part is easy to bend and break when being elastically bent.
Preferably, the matching part is slidably mounted on the sliding mounting seat through a limiting part; the limiting piece comprises a limiting head and a guide post extending backwards from the limiting head; be equipped with fore-and-aft spout on cooperation portion, the guide post is worn to establish in this spout and is connected on the slidable mounting seat, and spacing first width is greater than the spout width and breaks away from the sliding support seat with the restriction cooperation portion. The locating part can enough restrict the cooperation portion and leave the sliding support seat, does not hinder the cooperation portion slip simultaneously again, and can also restrict the cooperation portion and take place the skew in the left and right direction.
Preferably, a vertical elastic element is further arranged between the bottom of the supporting part and the sliding support seat, and the elastic element enables the supporting part to always have the tendency of moving upwards relative to the back support, and enables the waist rest body to always have the tendency of being pushed out forwards. The waist leans on the body to have the trend of forward rotation all the time for in the adjustment process, the waist leans on the body can be ejecting by oneself, makes the user can experience and pushes up waist effort.
Preferably, the waist rest body is in a shape of a Chinese character kou, rotating shafts are arranged on two sides of the waist rest body in a mirror image mode, and the rotating shafts are rotatably connected to the back support; and the rotating shaft is positioned at the lower part of the waist rest body. The rotating shaft is arranged at the lower part of the waist support body, so that the waist support body rotates eccentrically around the back support, the waist support body rotates backwards to apply downward oblique force to the supporting part, and the supporting part moves downwards.
Preferably, the lumbar support body comprises side support sections positioned at two sides, and the rotating shaft is arranged on the side support sections; and the side supporting sections are arc-shaped bodies with the upper parts protruding forwards. Therefore, in the rotation process of the lumbar support body, the protruding part is mainly controlled to eject or contract, so that the waist supporting adjusting effect of the lumbar support body is very obvious, and the feedback is timely.
Preferably, the matching part is provided with a first positioning hole and a second positioning hole which are arranged at an interval from top to bottom, and the second positioning hole is positioned below the first positioning hole; correspondingly, the waist rest body is provided with two initial positions, namely a backward position and an ejection position, wherein the backward position is the backward position, and the ejection position is the forward position, and the locking pin is in locking fit with the first positioning hole in the backward position; and under the ejection position, the locking pin is matched with the second positioning hole in a locking way. Through wearing to establish in first locating hole or second locating hole with the stop pin for before the user uses, can adjust the waist and lean on the body to stop at the position of moving back or ejecting position according to the demand.
Preferably, the adjusting assembly further comprises a cylindrical guide seat connected to the back support, two ends of the cylindrical guide seat are open and the inside of the cylindrical guide seat is through, the locking piece transversely penetrates through the cylindrical guide seat, a part of the locking piece, which is exposed out of the cylindrical guide seat and faces the positioning hole, forms a locking pin, and a pressure spring is arranged between the locking piece and the cylindrical guide seat; the pressure spring provides elasticity to ensure that the locking pin always has the tendency of penetrating in the positioning hole. The waist support body is unlocked by rotating the action control handle, and the waist support body can be automatically locked by loosening the control handle, so that the operation is more convenient.
Preferably, the control handle has a rotating part and a wrench exposed at one side of the back bracket; the rotating part is rotatably connected to the back support, and the wrench is wrenched to drive the rotating part to rotate left and right relative to the back support. The spanner exposes in back of the body support one side, and convenience of customers sits and can adjust on the seat support, need not to leave the seat support.
Preferably, a connecting block for enabling the rotating part and the locking piece to be linked is arranged between the rotating part and the locking piece, and two ends of the connecting block are respectively in rotating connection with the rotating part and the locking piece. The both ends of connecting block rotate with rotation portion and locking piece respectively and are connected for when rotation portion drove the locking piece motion, the connecting block can deflect and adjust the atress direction, and the power transmission effect is better, lateral shifting that the locking piece can be stable.
The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:
the waist support comprises a waist support body and a back support, wherein the waist support body is rotatably connected to the back support, a longitudinal support part is arranged between the waist support body and the back support, and the support part can stably support the waist support body; the supporting component can slide up and down relative to the sliding supporting seat, so that the waist rest body can be in a back position or a forward ejection position relative to the back support; the matching part at the bottom of the supporting part is provided with at least two positioning holes, the adjusting component comprises a locking piece, and the locking piece is provided with a locking pin matched with the positioning holes in a locking way; thereby control adjusting part can make the locking of support component in different initial position departments to reach the effect of adjusting the waist and leaning on body top waist effect.
And the supporting component also comprises an elastic part with elasticity, so that the waist rest body can elastically deflect to a certain degree when in use, and has a self-adaptive adjusting function. More importantly, after the waist leaned on the front and back rotation regulation, the supporting component also followed and made corresponding cambered surface rotation and upwards or downwards slided simultaneously for the elastic part of supporting component did not make the deformation in the regulation process, and provided the restoring force when leaving the ability of warping for the user to lean on the waist, just also made the user lean on different initial position and can both obtain same deformation degree when leaning on, can not take place to warp and can not provide fine deformation bearing capacity when the user leans on because of supporting component when leaning on the degree initial position regulation along with the waist.
2, a vertical elastic element is arranged between the bottom of the supporting part and the sliding support seat, and the elastic element enables the supporting part to always have the tendency of moving upwards relative to the back support and enables the waist rest body to always have the tendency of being pushed out forwards; so that the waist rest body can be ejected out automatically in the adjusting process; and be equipped with the pressure spring between locking piece and cylindric guide holder, the spring provides elasticity and makes the locking piece have the trend that makes the stop pin wear to establish in the locating hole all the time for effect control handle rotates to lean on the body to rotate the unblock, and the control handle that loosens can lock by oneself, and it is more convenient to operate.
3, the matching part slides vertically along the sliding support seat to correspond to the front-back rotation action of the lumbar support body, but not to move back and forth to correspond to the front-back rotation of the lumbar support body; the sliding support seat can be longitudinally arranged on the back support, so that the space on the back support is reasonably distributed, and the front support and the back support are lighter and thinner. If the supporting component is arranged to move back and forth, a moving space in the front and back direction needs to be reserved on the back support, so that the back support is thicker and heavier, and is not beneficial to processing and assembling.
4, the supporting component comprises a matching part and an elastic part, and the elastic part adopts a supporting elastic sheet; the matching part is in sliding fit with the sliding support seat on the back support, and the upper end of the support elastic sheet is in clamping fit with the waist rest body; each plays its own role, and the structure is stable; the upper end of the supporting elastic sheet is clamped and matched with the waist rest body, so that the connection is convenient and quick; and the stress is prevented from being too concentrated when the bending deformation is carried out; if the screw connection is adopted, the stress is concentrated on one point, so that the supporting part is easy to bend and break when being elastically bent.
5, the waist rest body is in a shape of a Chinese character 'kou', the waist rest body comprises side supporting sections positioned at two sides, and the side supporting sections are arc-shaped bodies with the upper parts protruding forwards; the rotating shaft is rotatably connected to the back support, the rotating shaft is arranged on the side supporting section, and the rotating shaft is positioned at the lower part of the waist rest body. The pivot sets up in the lower part of waist and leans on the body, makes then the waist to lean on the body for eccentric rotation for the waist leans on the body to rotate backward and can apply for the oblique decurrent power of supporting component, and direct action supporting component moves down. And the rotation range on waist leans on body upper portion is bigger, and the collateral branch supports the section and is the forward convex arc body in upper portion to make the waist lean on the body rotation in-process, the main control be its bulge ejecting or shrink, make the top waist of waist lean on the body adjust the effect very obvious, the feedback is timely.
5, the control handle is provided with a rotating part and a wrench exposed at one side of the back bracket; the rotating part is rotatably connected to the back support, and the wrench is wrenched to drive the rotating part to rotate left and right relative to the back support. The spanner exposes in back of the body support one side, and convenience of customers sits and can adjust on the seat support, need not to leave the seat support.
Drawings
Figure 1 is a schematic perspective view of a lumbar support body in an initial position in an embodiment of the present invention;
figure 2 is a schematic perspective view of the lumbar support body in an ejected position in an embodiment of the present invention;
FIG. 3 is a schematic perspective view of the connection between the lumbar support body and the back support in the embodiment of the present invention;
figure 4 is an exploded view of the lumbar support body and back bracket connection in an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a support member coupled to a lumbar support body in an embodiment of the present invention;
FIG. 6 is a schematic perspective view of the back side of a support member according to an embodiment of the present invention;
FIG. 7 is a schematic perspective view of the front side of a support member according to an embodiment of the present invention;
FIG. 8 is a schematic perspective view of an embodiment of an adjusting assembly of the present invention engaged with an engaging portion;
FIG. 9 is a schematic perspective view of the embodiment of the present invention in which the engaging portion is located at the bottom of the sliding support;
FIG. 10 is a view showing a connection structure of an adjustment member in an embodiment of the present invention;
FIG. 11 is a cross-sectional view of an adjustment assembly in an embodiment of the invention.
The figures are numbered: a lumbar support body 1; a back support A; a support member 3; an adjustment assembly 4; a cylindrical guide seat 5; a locking member 6; a control handle 7; a rotating portion 7 a; a wrench 7 b; a fitting portion 8; a first positioning hole 9; a second positioning hole 10; a locking pin 11; a side support section 1 a; a rotating shaft 12; a rotating base 13; an elastic portion 14; a slide support seat 15; a cross support section 16; a buckle 17; an elastic latch 18; a latch 19; a chute 20; a mounting hole 21; a stopper 22; the guide posts 22 a; a stopper head 22 b; an elastic member 23; a connecting block 24; a pressure spring 25.
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 invention 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 present embodiment is described with reference to the reference orientation of each part, such as front and rear, in a state where the user normally uses the seat after sitting on the seat.
The specific embodiment of the invention is as follows:
as shown in fig. 1 to 11, the present invention provides a lumbar support depth adjusting device, which comprises a lumbar support body 1 rotatably connected to a back support a, wherein the lumbar support body 1 can rotate back and forth around the back support a. A longitudinal supporting component 3 is arranged between the waist rest body 1 and the back support A, the supporting component 3 comprises a matching part 8 at the bottom and a vertical elastic part 14 with elasticity, the matching part 8 is in sliding fit with the back support A, and the supporting component 3 can correspondingly slide upwards or downwards along the back support A in response to the front-back rotation action of the waist rest body 1. The back support A is also provided with an adjusting component 4 positioned on one side of the supporting part 3, and the adjusting component 4 comprises a cylindrical guide seat 5 connected on the back support A, a locking piece 6 arranged in the cylindrical guide seat 5 and a control handle 7 capable of controlling the movement of the locking piece 6; wherein the control handle 7 is rotationally connected on the back support A, and the action control handle 7 rotates to drive the locking piece 6 to move transversely along the axial direction of the cylindrical guide seat 5. In addition, two positioning holes spaced up and down are provided on the fitting portion 8 at the bottom of the support member 3, and the positioning holes include a first positioning hole 9 located above and a second positioning hole 10 located below; the end part of the locking piece 6 is correspondingly provided with a locking pin 11 which can penetrate out of the cylindrical guide seat 5 to be in splicing fit with the positioning hole, and the locking pin 11 is inserted into the first positioning hole 9 or the second positioning hole 10 to play a role of locking the matching part 8, so that the initial position of the lumbar support body 1 can be adjusted in advance before the lumbar support is used. The method specifically comprises the following steps: when the locking pin 11 is disengaged from the positioning hole, the lumbar support body 1 can rotate back and forth and drive the supporting part 3 to move up and down so as to adjust the initial position of the lumbar support body 1; and the lumbar support body 1 is fixed at different initial positions by controlling the locking pin 11 to be inserted into the first positioning hole 9 or the second positioning hole 10. In addition, under the effect of elastic component 14, when waist leans on body 1 to be in different initial position and receive backward effort, impel elastic component 14 to produce deformation in order to carry out elastic support to waist leans on body 1, then can take place the self-adaptation elasticity of certain degree and deflect, use more comfortablely.
Further, as shown in fig. 1-5, the lumbar support body 1 is shaped like a Chinese character 'kou', the lumbar support body 1 includes side support sections 1a at two sides, and a rotating shaft 12 horizontally extending toward the center of the lumbar support body 1 is disposed at the lower part of the side support sections 1 a; the two sides of the back support A are correspondingly provided with rotating seats 13, and the rotating shaft 12 is rotatably connected on the rotating seats 13 so that the lumbar support body 1 can rotate around the back support A in the front-back direction. The key points are as follows: as shown in fig. 1 and 2, the rotating shaft 12 is disposed at the lower portion of the lumbar support body 1, so that the lumbar support body 1 rotates eccentrically around the back support a, and the lumbar support body 1 rotates backwards to apply a downward oblique force to the support member 3, and effectively acts on the support member 3 to slide up and down. Then make the rotation range on waist by body 1 upper portion bigger, just collateral branch support section 1a be the forward convex arc body in upper portion to make the waist by the body 1 rotation in-process, the main control be its bulge ejecting or shrink, make the waist by the top waist adjusting effect of body 1 very obvious, the feedback is timely.
As shown in fig. 3-6, the elastic portion 14 is a supporting elastic sheet extending upwards from the matching portion 8, and the supporting elastic sheet is an arc-shaped body with a middle position protruding forwards, so that when the lumbar support body 1 rotates backwards and presses the supporting elastic sheet, the supporting elastic sheet deforms to a certain extent in the vertical direction to make the matching portion 8 have a tendency of moving downwards. And the upper end joint of elastic component 14 is in the upper end of waist by body 1, specifically: the lumbar support body 1 further comprises transverse support sections 16 positioned at the upper end and the lower end, wherein a bayonet 17 is arranged at the middle position of the transverse support section 16 at the upper part, and an elastic clamping tongue 18 and a clamping block 19 positioned below the elastic clamping tongue 18 are correspondingly arranged at the upper end of the elastic part 14; when in connection, the upper end of the elastic part 14 passes through the bayonet 17 to enable the elastic clamping tongue 18 to be clamped out of the bayonet 17, and the transverse supporting section 16 is limited between the elastic clamping tongue 18 and the clamping block 19, so that the upper end of the elastic part 14 and the lumbar support body 1 are relatively fixed in the vertical direction; the elastic part 14 has elasticity, so that the waist rest body 1 can elastically deflect to achieve a self-adaptive function in a use state, and is more comfortable. The structure of joint is adopted, connects convenient and fast, and the atress is dispersed relatively, if adopt screwed connection, the atress concentrates on a bit, leads to the material fracture easily.
Further, a longitudinal slide support seat 15 is provided at the middle position of the back support a, and the engaging portion 8 at the lower end of the support member 3 is slidably engaged in the slide support seat 15; as shown in fig. 6, the sliding fit manner of the matching portion 8 and the sliding support seat 15 adopts a surface contact sliding fit, the back surface of the matching portion 8 is arc-shaped, the sliding contact surfaces of the sliding support seat 15 and the matching portion 8 are correspondingly arranged into arc-shaped surfaces, and the arc-shaped surfaces are bent towards the front upper side from bottom to top; therefore, when the supporting part 3 moves upwards along the sliding supporting seat 15, the lumbar support body 1 will move forwards at the same time, so as to drive the lumbar support body 1 to rotate forwards and eject; the matching part 8 slides vertically along the sliding support seat 15 to correspond to the front and back rotation action of the lumbar support body 1, and the sliding support seat 15 can be longitudinally arranged on the back support A, so that the space on the back support A is reasonably distributed, and the front and back are lighter and thinner; if the supporting part 3 is arranged to move back and forth, a moving space in the front and back direction needs to be reserved on the back support A, so that the back support A is thicker and heavier, and the internal structure of the back support A is too compact and complicated. As shown in fig. 6-8, a sliding slot 20 is formed in the engaging portion 8 and extends through the sliding support 15 in a longitudinal direction, a mounting hole 21 is formed in the sliding support 15, the engaging portion 8 is slidably mounted on the sliding support 15 through a limiting member 22, the limiting member 22 has a limiting head 22b and a guiding post 22a extending from the limiting head 22b in a rearward direction, the guiding post 22a passes through the sliding slot 20 and is connected in the mounting hole 21, and the width of the limiting head 22b is greater than the width of the sliding slot 20, so as to limit the engaging portion 8 from being separated from the sliding support 15. Through this connection structure, the stopper 22 can restrict the engaging portion 8 from leaving the slide bearing 15 without interfering with the sliding of the engaging portion 8, and can restrict the engaging portion 8 from shifting in the left-right direction. In addition, as shown in fig. 3 and 8, an elastic element 23 is further disposed between the lower end of the engaging portion 8 and the sliding support 15, the elastic element 23 is a longitudinally disposed spring, and the elastic element 23 is configured to provide an elastic force to make the support component 3 always have a tendency to slide upwards, so that the lumbar support body 1 always has a tendency to rotate forwards and push out, and thus the lumbar support body 1 can push out forwards by itself during adjustment.
As shown in fig. 3-11, the adjustment assembly 4 is effective to lock the engagement portion 8, and thus the lumbar support body 1; specifically, the method comprises the following steps: the cylindrical guide seat 5 is arranged at a position close to the matching part 8, and the cylindrical guide seat 5 is fixed on the back bracket A through screw connection; the two ends of the cylindrical guide seat 5 are open and the interior of the cylindrical guide seat is communicated; the locking piece 6 transversely penetrates through the cylindrical guide seat 5, the locking piece 6 can transversely move along the axial direction of the cylindrical guide seat 5, the locking piece 6 is exposed out of the cylindrical guide seat 5, and a locking pin 11 is formed at the part, facing the positioning hole, of the locking piece 6; the control handle 7 comprises a rotating part 7a and a wrench 7b exposed at one side of the back bracket A; the rotating part 7b is rotatably connected to the back support A, and the rotating part 7b can rotate left and right relative to the back support A; as shown in fig. 10-11, the rotating portion 7a and the locking member 6 are linked through a connecting block 24, and two ends of the connecting block 24 are rotatably connected with the rotating portion 7a and the locking member 6, so that the rotating portion 7a rotates left and right to drive the connecting block 24 to move transversely, and the locking member 6 is controlled to move horizontally left and right, and the connecting block 24 can deflect to adjust the stress direction, so that the operation is more labor-saving. And the locking piece 6 is positioned in the cylindrical guide seat 5, a pressure spring 25 is also arranged between the locking piece 6 and the cylindrical guide seat 5, and the pressure spring 25 can provide elasticity to ensure that the locking piece 6 always has the tendency that the locking pin 11 is outwards penetrated out of the cylindrical guide seat 5 and inserted into the first positioning hole 9 or the second positioning hole 10. The first positioning hole 9 and the second positioning hole 10 are arranged on the side wall of the matching part 8 close to the cylindrical guide seat 5; and the positional relationship of the first positioning hole 9 and the second positioning hole 10 is configured as: when the support member 3 is at the lowest position of the slide bearing 15 as shown in fig. 9, the first positioning hole 9 is just aligned with the locking pin 11 hole, and the locking pin 11 is inserted into the first positioning hole 9, as shown in fig. 1, and in this position, the lumbar support body 1 is at the backward position (i.e., the normal use state). If the waist rest body 1 needs to achieve the waist supporting effect, the wrench 7b is wrenched to rotate the rotating part 7a, so as to drive the locking piece 6 to be far away from the matching part 8, and the locking pin 11 is withdrawn from the first positioning hole 9; as shown in fig. 2 and 8, the supporting component 3 will move up along the sliding support seat 15 under the action of the elastic element 23 and simultaneously drive the lumbar support body 1 to rotate forward and eject, when the supporting component 3 moves up to the maximum position, the second positioning hole 10 is just aligned with the locking pin 11, and only by loosening the wrench 7b, the locking pin 11 will be inserted into the second positioning hole 10 under the action of the elastic force of the pressure spring 25, so as to lock the lumbar support body 1 again, and at this time, the lumbar support body 1 is in the ejected position. If the lumbar support body 1 needs to be reset, the wrench 7b is pulled again to push the lumbar support body 1 to rotate backwards for resetting, and then the wrench 7b is loosened again; if a user sits on the seat, the user can directly lean backwards to act on the waist rest body 1, and the operation is very quick and convenient; and the wrench 7b is exposed out of the side surface of the back support A, so that a user can conveniently sit on the chair to adjust the chair without leaving the chair.
In summary, the lumbar support depth adjustment device of the present invention can adjust the initial position of the lumbar support body 1 in advance before the user uses the lumbar support device. When the waist support body 1 is required to be used and has the waist supporting effect, only the control handle 7 is needed to be acted, the waist support body 1 can automatically rotate forwards to be ejected, and then the control handle 7 is loosened to lock the waist support body 1 at the ejection position. If only need the waist to lean on body 1 and play when ordinary support effect, effect control handle 7 and promote waist to lean on body 1 and rotate backward, then with waist lean on body 1 locking in the position of moving back can, the operation is adjusted lightly laborsavingly. In addition, when the user sits on and leans against the lumbar support body 1 after adjusting the initial position of the lumbar support body 1, the elastic part 14 has elasticity, so that the lumbar support body 1 can still elastically deflect within a certain range, thereby realizing the self-adaptive function of the lumbar support body 1. So that the lumbar support body 1 can pre-adjust its initial position according to the user's requirements, and no matter under the ejection position or the retreat position, the lumbar support body 1 can still find the self-adaptive elastic deflection.
Alternatively, two or more positioning holes (not shown) may be provided in the engaging portion 8, and the lumbar support body 1 may have more adjustment positions by locking the locking pins with the positioning holes at different positions, thereby further satisfying the use requirements of different users.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (13)
1. A lumbar support depth adjustment device characterized by comprising:
the waist rest body is rotatably connected to the back bracket; the waist rest body can rotate back and forth around the back support;
the supporting component is longitudinally arranged between the waist rest body and the back support and comprises a matching part at the bottom and a vertical elastic part with elasticity; the matching part is in sliding fit with the back support along the vertical direction, and the upper end of the elastic part is connected with the waist rest body; the supporting component correspondingly slides up and down along the back bracket in response to the back-and-forth rotation action of the waist rest body; and at least two positioning holes which are spaced up and down are arranged on the matching part;
the adjusting assembly is arranged beside the supporting part; the adjusting assembly comprises a locking piece connected to the back bracket and a control handle for controlling the locking piece to move transversely; a locking pin which is in inserted fit with the positioning hole is formed on the locking piece; when the locking pin is separated from the positioning hole, the lumbar support body rotates forwards and backwards and drives the supporting part to move up and down so as to adjust the initial position of the lumbar support body; the locking pin is inserted into the positioning hole at the corresponding position to fix the initial position of the lumbar support body; when the lumbar support body is at different initial positions and is subjected to backward acting force, the elastic part is promoted to deform so as to elastically support the lumbar support body.
2. The lumbar support depth adjustment device of claim 1, wherein: the middle position of the lower part of the back support is provided with a longitudinal sliding support seat, and the matching part is in sliding fit with the sliding support seat.
3. The lumbar support depth adjustment device of claim 2, wherein: the back surface of the matching part is arc-shaped, the sliding support seat and the sliding contact surface of the matching part are correspondingly arranged into arc-shaped surfaces, and the arc-shaped surfaces on the sliding support seat are bent towards the front upper part from bottom to top; so that the waist rest body moves forwards simultaneously in the process that the supporting component moves upwards along the sliding supporting seat.
4. The lumbar support depth adjustment device of claim 1, wherein: the elastic part is a supporting elastic sheet which extends upwards from the matching part, and the supporting elastic sheet is an arc-shaped body with the middle position protruding forwards.
5. The lumbar support depth adjustment device of claim 1, wherein: the upper end of the elastic part is in clamping fit with the waist rest body, the upper end of the waist rest body is provided with a bayonet, and the upper end of the elastic part is correspondingly provided with an elastic clamping tongue and a clamping block which are spaced up and down; the upper end of the elastic part penetrates out of the bayonet upwards and the elastic clamping tongue is clamped outside the bayonet, and the elastic clamping tongue and the clamping block limit the upper end of the elastic part and the waist rest body to be relatively fixed in the vertical direction.
6. The lumbar support depth adjustment device of claim 2, wherein: the matching part is slidably arranged on the sliding installation seat through a limiting part; the limiting piece comprises a limiting head and a guide post extending backwards from the limiting head; be equipped with fore-and-aft spout on cooperation portion, the guide post is worn to establish in this spout and is connected on the slidable mounting seat, and spacing first width is greater than the spout width and breaks away from the sliding support seat with the restriction cooperation portion.
7. The lumbar support depth adjustment device of claim 2, wherein: and a vertical elastic element is also arranged between the bottom of the supporting part and the sliding support seat, and the elastic element enables the supporting part to always have the tendency of moving upwards relative to the back support, so that the waist rest body always has the tendency of being pushed out forwards.
8. The lumbar support depth adjustment device of claim 1, wherein: the waist rest body is in a shape of a Chinese character kou, rotating shafts are arranged on two sides of the waist rest body in a mirror image mode, and the rotating shafts are rotatably connected to the back support; and the rotating shaft is positioned at the lower part of the waist rest body.
9. The lumbar support depth adjustment device of claim 7, wherein: the waist rest body comprises side supporting sections positioned at two sides, and the rotating shaft is arranged on the side supporting sections; and the side supporting sections are arc-shaped bodies with the upper parts protruding forwards.
10. The lumbar support depth adjustment device of claim 1, wherein: the matching part is provided with a first positioning hole and a second positioning hole which are arranged at an upper and a lower interval, and the second positioning hole is positioned below the first positioning hole; correspondingly, the waist rest body is provided with two initial positions, namely a backward position and an ejection position, wherein the backward position is the backward position, and the ejection position is the forward position, and the locking pin is in locking fit with the first positioning hole in the backward position; and under the ejection position, the locking pin is matched with the second positioning hole in a locking way.
11. The lumbar support depth adjustment device of claim 1, wherein: the adjusting assembly further comprises a cylindrical guide seat connected to the back support, two ends of the cylindrical guide seat are open and the inside of the cylindrical guide seat is through, the locking piece transversely penetrates through the cylindrical guide seat, the part of the locking piece, which is exposed out of the cylindrical guide seat and faces the positioning hole, forms a locking pin, and a pressure spring is arranged between the locking piece and the cylindrical guide seat; the pressure spring provides elasticity to ensure that the locking pin always has the tendency of penetrating in the positioning hole.
12. The lumbar support depth adjustment device of claim 1, wherein: the control handle is provided with a rotating part and a wrench exposed at one side of the back bracket; the rotating part is rotatably connected to the back support, and the wrench is wrenched to drive the rotating part to rotate left and right relative to the back support.
13. The lumbar support depth adjustment device of claim 12, wherein: the rotating part and the locking piece are provided with connecting blocks for enabling the rotating part and the locking piece to be linked, and two ends of each connecting block are respectively connected with the rotating part and the locking piece in a rotating mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111293424.8A CN114009992B (en) | 2021-11-03 | 2021-11-03 | Waist leans on degree of depth adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111293424.8A CN114009992B (en) | 2021-11-03 | 2021-11-03 | Waist leans on degree of depth adjusting device |
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| CN114009992A true CN114009992A (en) | 2022-02-08 |
| CN114009992B CN114009992B (en) | 2023-07-25 |
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Cited By (1)
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| CN115413902A (en) * | 2022-08-15 | 2022-12-02 | 浙江胜途家具科技有限公司 | Waist of chair leans on adjusting device and chair |
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| CN114009992B (en) | 2023-07-25 |
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