CN217885506U - Waist leans on regulation chair - Google Patents

Abstract

The utility model discloses a waist is by adjusting chair, the electric iron comprises a tray, the seat support, the back of the chair and waist are leaned on, the tray is including wobbling tailstock, the seat support is fixed on the tray, the back of the chair is fixed on the tailstock, waist is leaned on including the support frame, the connecting piece, locating part and mount pad, but the support frame wobbling is installed on the connecting piece, the bottom and the back of the chair or the tailstock of connecting piece are articulated through articulated shaft, the cover is equipped with the torsional spring that is used for restoring to the throne on the articulated shaft, a torsional arm of torsional spring supports and presses on the connecting piece, another torsional arm of torsional spring supports and presses in the seat support bottom, mount pad and seat support fixed connection, locating part one end and mount pad sliding connection, locating part accessible locking mechanism fixes on the mount pad, the other end and the connecting piece sliding fit of locating part. Above-mentioned scheme can let every user have self characteristics, and then change the chair and to the support curve of user's waist and back through adjusting back of the chair and lumbar support, all provide more comfortable experience for every user.

Description

Waist leans on regulation chair

Technical Field

The utility model relates to a house field especially relates to a waist leans on regulation chair.

Background

People can all use the chair according to self comfortable posture, will bring pressure to the waist in the long term, cause unnecessary damage to the waist, consequently for avoiding this problem, many people all can external waist lean on the device to correct the position of sitting of oneself, common waist leans on the device to fix in back of the chair department through the bandage mostly, but use a period of time after, the phenomenon that the pine takes off appears in the bandage, people just need continuous position of adjusting the waist and leaning on when using, so that the waist leans on and plays corresponding effect. Sub-health is always a living problem concerned by people, wherein lumbar vertebra problems brought by long-time sitting are particularly frequent, as is well known, the spine of a human body is S-shaped, the back of a chair of the prior chair is generally straight up and down, or the middle lower part of the back of the chair slightly arches to improve the comfort of back support of the chair, but the chairs with the structures cannot better support the S-shaped spine of the human body, and the back support angles of the chairs with the structures are generally not adjustable and cannot meet individual differences, so that the spine problem brought to users by long-time sitting cannot be solved. The patent with the publication number of CN201743302U discloses a chair waist rest, include by the inside casing, the frame, the lift fixed plate, the swivel mount, and a support, the base constitutes, the lower extreme of support is installed on the base through the axle, the swivel mount is installed to the upper end of support, the swivel mount passes through the round pin to be connected with the support upper end, the lift fixed plate is fixed on the swivel mount, be provided with a groove on the lift fixed plate, be provided with the card on the groove, be provided with the sliding tray on the frame, the lift fixed plate is installed in the sliding tray, be provided with the locator card in the sliding tray, card on the lift fixed plate cooperates with the locator card on the frame. In the above-mentioned patent, although the waist leans on can realize inclining and facing upward and adjust, can't lean on current angle fixed, can't change the position that the key was supported to every user's needs, and then can't provide more comfortable experience for every user.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide a lumbar support adjusting chair, wherein each user can adjust the support angle and support the curve according to the characteristics of the user.

In order to achieve the above purpose, the utility model adopts the following technical scheme: including the tray, the seat support, the back of the chair and waist are leaned on, the tray is including wobbling tailstock, the seat support is fixed on the tray, the back of the chair is fixed on the tailstock, the waist is leaned on including the support frame, the connecting piece, locating part and mount pad, the support frame can be swung and is installed on the connecting piece, the bottom of connecting piece is articulated through the hinge axis with back of the chair or tailstock, the cover is equipped with the torsional spring that is used for reseing on the articulated shaft, a torque arm of torsional spring supports and presses on the connecting piece, another torque arm of torsional spring supports and presses in the seat support bottom, mount pad and seat support fixed connection, locating part one end and mount pad sliding connection, locating part accessible locking mechanism fixes on the mount pad, the other end and the connecting piece sliding fit of locating part.

Preferably, the bottom of the chair back protrudes with two second hinge parts, the bottom of the connecting piece protrudes with two first hinge parts, the two first hinge parts are positioned between the two second hinge parts and are hinged through a hinge shaft, the hinge shaft is sleeved with two torsion springs, and the torsion springs are positioned between the first hinge parts. Thus, the operation of the chair is more stable.

Preferably, the bottom of the mounting seat is recessed upwards to form a second mounting groove, the second mounting groove extends backwards through the mounting seat, one end of the limiting part is located in the second mounting groove, and the other end of the limiting part is slidably connected with the mounting seat through a first connecting shaft.

Preferably, the left side and the right side of the second mounting groove are both provided with second sliding grooves, and two ends of the first connecting shaft are in sliding fit with the second sliding grooves.

Preferably, the top of the second mounting groove protrudes downwards to form a limiting seat, the top of the limiting member is provided with a third limiting groove, and the limiting seat is inserted into the third limiting groove and is in sliding fit with the third limiting groove. Therefore, the swing range of the waist rest is limited, and the use safety of a user is ensured.

Preferably, the locking mechanism comprises a locking piece, the locking piece is in sliding fit with the mounting seat, a locking portion protrudes out of the locking piece, a locking groove is recessed in the limiting piece, and the locking piece slides to enable the locking portion to be connected with the locking groove of the limiting piece in a plugging and pulling mode, so that the limiting piece is fixed. Like this, can be with the rigidity of locking piece, convenience of customers adjusts the angle that waist leaned on and the back of the chair, provides more comfortable experience for the user.

Preferably, the support frame further comprises an adjusting mechanism, and the adjusting mechanism is used for adjusting the angle between the connecting piece and the support frame. Like this, can be with the rigidity of locking piece, convenience of customers adjusts the angle that waist leaned on and the back of the chair, provides more comfortable experience for the user.

Preferably, the adjusting mechanism comprises a first connecting seat, a second connecting seat, a first adjusting plate and a second adjusting plate, the first connecting seat is fixedly connected with the connecting piece, the second connecting seat is fixedly connected with the supporting frame, the first connecting seat and the first adjusting plate are fixedly connected, the second connecting seat and the second adjusting plate are fixedly connected, the first adjusting plate is hinged with the second adjusting plate, a first adjusting hole is formed in the first adjusting plate, a second adjusting hole is formed in the second adjusting plate, the first adjusting hole is aligned with the second adjusting hole, mutually-butted elastic reeds and baffle plates are arranged in the first adjusting hole, the baffle plates extend into the second adjusting hole, one side edge of the second adjusting hole is a sawtooth-shaped edge, one end of the baffle plates is clamped with the sawtooth-shaped edge, the second adjusting hole is gradually narrowed from one side of the sawtooth-shaped edge, the baffle plates extend into the second adjusting hole, and one end of the baffle plates is clamped with the sawtooth-shaped edge. Like this, can be with the rigidity of locking piece, convenience of customers adjusts the angle that waist leaned on and the back of the chair, provides more comfortable experience for the user.

Preferably, the second connecting seat is provided with two second adjusting plates, the first adjusting plate is positioned between the second adjusting plates, the connecting seat further comprises two buckle covers, and the two second adjusting plates are positioned between the two buckle covers and are fixedly connected. Like this, can be with the rigidity of locking piece, convenience of customers adjusts the angle that waist leaned on and the back of the chair, provides more comfortable experience for the user.

The utility model has the advantages that, in the difference and the traditional scheme, the chair back and the waist rest are in relatively fixed positions, in the scheme, the waist rest can be fixed at the current position through the locking mechanism, then the included angle between the chair back and the waist rest is changed by adjusting the tilting angle of the chair back, the support curve of the chair to the waist and the back of the user is changed, so that the user can adjust the leaning position suitable for the user by himself, the leaning position can be adjusted according to the body type of each person, and the requirements of the user with various body types can be met; according to the scheme, the inclination angle of the waist rest in the current state can be changed through the adjusting mechanism, the user can select the key position of the waist rest support by himself, the curve of the chair supporting the waist and the back of the user is changed, and the applicability and the comfort degree are further improved; above-mentioned scheme is under the condition that does not use locking mechanism, and the waist leans on the elasticity that can lean on the torsional spring to support for user's waist, and then when being used for sitting down or rising, the waist leans on to lean on the torsional spring can give the user support all the time, avoids causing the waist damage because of exerting oneself too violently.

Drawings

FIG. 1 is a first schematic structural view of a lumbar support adjusting chair;

FIG. 2 is a second schematic structural view of a lumbar support adjustment chair;

FIG. 3 is a schematic view of a lumbar support adjustment chair with the seat removed;

FIG. 4 is a schematic view of the lumbar support;

FIG. 5 is a schematic view of the structure of the connecting member and the adjustment mechanism;

FIG. 6 is a schematic view of the structure of the connector;

FIG. 7 is a schematic view showing a connection structure of the first regulating plate, the resilient spring and the retainer;

FIG. 8 is a schematic view of a first adjustment plate;

FIG. 9 is a schematic view of a second regulating plate;

FIG. 10 is a schematic structural view of the adjustment mechanism with the first and second connector blocks and the end cap removed;

FIG. 11 is a schematic structural view of the locking seat;

FIG. 12 is a schematic view of the latch member;

FIG. 13 is a schematic view of the mounting base;

fig. 14 is a schematic structural diagram of the limiting member.

Reference numerals: 1. a tray; 11. a tail seat; 2. a chair seat; 3. a chair back; 31. a lumbar support groove; 4. a support frame; 5. a connecting member; 50. a first cover plate; 501. hinging a shaft; 51. a containing groove; 52. a first mounting groove; 53. a first sliding groove; 54. a first cover plate slot; 55. a first limit groove; 56. a first hinge portion; 59. a torsion spring; 6. a stopper; 61. a first connection hole; 62. a second connection hole; 63. a lock part; 64. a locking groove; 65. a third limiting groove; 66. a first connecting shaft; 67. a second connecting shaft; 7. a mounting base; 71. a second mounting groove; 72. a chair seat fixing seat; 73. a first locking fixing seat; 74. a limiting seat; 75. a second sliding groove; 76. a second cover plate groove; 77. a second limit groove; 78. a second cover plate; 81. a locking seat; 82. a second locking fixing seat; 83. a third sliding groove; 86. a locking member; 87. a locking portion; 9. an adjustment mechanism; 91. covering; 92. a first adjusting plate; 93. a first adjustment aperture; 931. a circular through hole; 932. a triangular through hole; 933. a limiting bulge; 94. a reed; 95. a baffle plate; 96. a second adjusting plate; 97. a second adjustment aperture; 971. a serrated edge; 98. the first connecting seat.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A lumbar support adjusting chair as shown in fig. 1-4, which includes a tray 1, a seat 2, a backrest 3 and a lumbar support, wherein the tray 1 includes a swingable tailstock 11, the seat 2 is fixed on the tray 1, the backrest 3 is fixed on the tailstock 11, the bottom of the lumbar support is hinged to the bottom of the backrest 3, the lumbar support includes a support frame 4, a connecting member 5, a limiting member 6 and a mounting seat 7, the support frame 4 is swingably mounted on the connecting member 5 through an adjusting mechanism 9, the adjusting mechanism 9 is used for adjusting an angle between the connecting member 5 and the support frame 4, the bottom of the connecting member 5 is hinged to the bottom of the seat 2, the connecting member 5 is hinged to the seat 2 through a hinge shaft 501, a torsion spring 59 for resetting is sleeved on the hinge shaft 501, one torsion arm of the torsion spring 59 abuts against the backrest 3, the other torsion arm of the torsion spring 59 abuts against the connecting member 5, the mounting seat 7 is fixedly connected to the seat 2, one end of the limiting member 6 is slidably connected to the mounting seat 7, the limiting member 6 can be fixed on the mounting seat 7 through a locking mechanism, and the other end of the limiting member 6 tilts upward and is slidably matched to the connecting member 5. In other embodiments, the connecting element 5 can also be hinged to the tailstock 11 of the pallet 1 by means of a hinge shaft 501.

The bottom of back of the chair 3 is protruding to have two articulated portions of second, and the bottom of connecting piece 5 is protruding to have two articulated portions 56, and two articulated portions 56 of first are located between two articulated portions of second, and two articulated portions 56 of first and two articulated portions of second are articulated through articulated shaft 501, and torsional spring 59 cover is established on articulated shaft 501, and two torsion arms of torsional spring 59 contradict with back of the chair 3 and connecting piece 5 respectively. A torsion spring 59 is located between the two first hinges 56; in this embodiment, the number of the torsion springs 59 is two, so that the stability of the lumbar support during use can be ensured, and the following performance of the lumbar support can be improved, so that a user can always support the lumbar support during the process of separating from the chair back 3. The chair back 3 is provided with a lumbar support groove 31, the lumbar support groove 31 penetrates through the chair back 3 in the front-back direction, the lumbar support 4 swings in the front-back direction to penetrate through the lumbar support groove 31 of the chair back, and the lumbar support 4 is reset through a torsion spring 59.

In this embodiment, the connecting member 5 is provided with the accommodating groove 51, the end walls on the left and right sides of the accommodating groove 51 are both provided with the first sliding grooves 53, the end surfaces on the left and right sides of the connecting member 5 are both provided with the first cover plate grooves 54, the first limiting grooves 55 are provided between the first cover plate grooves 54 and the first sliding grooves 53, the first sliding grooves 53 and the first cover plate grooves 54 are communicated through the first limiting grooves 55, and the first cover plate grooves 55, the first limiting grooves 54 and the first sliding grooves 53 are all waist-shaped grooves and the areas of the longitudinal sections are gradually reduced; the connecting member 5 is provided with a first mounting groove 52, the first mounting groove 52 is located above the receiving groove 51, and the first mounting groove 52 is communicated with the receiving groove 51.

In this embodiment, the front end and the rear end of the limiting member 6 are respectively provided with a first connection hole 61 and a second connection hole 62, the first connection hole 61 and the second connection hole 62 penetrate through the limiting member 6 in the left-right direction, the rear end of the limiting member 6 is located in the accommodating groove 51, the rear end of the limiting member 6 is slidably connected with the connecting member 5 through a second connection shaft 67, the second connection shaft 67 passes through the second connection hole 62, the left end and the right end of the second connection shaft 67 respectively pass through the two first sliding grooves 53, the left end and the right end of the second connection shaft 67 are respectively provided with a rear second limiting wheel, the two second limiting wheels are respectively located in the two first limiting grooves 55, and the first cover plates 50 are respectively fixed in the first cover plate grooves 54, so that the sliding connection between the limiting member 6 and the connecting member 5 is realized, the left side and the right side of the limiting member 6 are blocked by the two first cover plates 50, and the ornamental value of the limiting member 6 is improved. A locking part 63 protrudes from the front end of the limiting part 6, and a locking groove 64 is formed at the right end of the locking part 63, wherein in the embodiment, the locking groove 64 comprises two grooves arranged in the front-back direction; a third limiting groove 65 is formed in the locking portion 63, and the third limiting groove 65 penetrates through the locking portion 63 in the vertical direction.

As shown in fig. 2, 3, 4, 13 and 14, the bottom of the mounting seat 7 is recessed upwards to form a second mounting groove 71, the second mounting groove 71 extends backwards through the mounting seat 7, a plurality of fixing seats are protruded from the top of the second mounting groove 71, the plurality of fixing seats include a plurality of seat fixing seats 72 and a first locking fixing seat 73, and the seat fixing seats 72 are located at the front side of the first locking fixing seat 73. The seat fixing seats 72 comprise three, the first locking fixing seats 73 comprise two, and the two first locking fixing seats 73 are arranged in the front-back direction; the seat 2 is fixedly connected to the seat fixing base 72 of the mounting base 7 by a plurality of fasteners. A limiting seat 74 is further protruded in the second mounting groove 71, and the limiting seat 74 is positioned at the left side of the two first locking fixing seats 73; the front section of the limiting member 6 is located in the second mounting groove 71, and the limiting seat 74 is located in the third limiting groove 65 of the locking portion 63 of the limiting member 6 and is in sliding fit. The left and right end walls of the second mounting groove 71 are respectively provided with a second sliding groove 75, the second sliding grooves 75 are positioned at the rear side of the first locking fixing seat 73, the left and right end surfaces of the mounting seat 7 are respectively provided with a second cover plate groove 76, a second limiting groove 77 is respectively arranged between the second cover plate groove 76 and the second sliding grooves 75, and the second cover plate grooves 76 and the second sliding grooves 75 are communicated through the second limiting grooves 77; the second cover plate groove 76, the second sliding groove 75 and the second limiting groove 77 are all waist-shaped grooves, and the longitudinal cross-sectional areas of the three grooves of the second cover plate groove 76, the second limiting groove 77 and the second sliding groove 75 are sequentially reduced; the limiting member 6 is slidably connected to the mounting base 7 through a first connecting shaft 66, the first connecting shaft 66 penetrates through the first connecting hole 61, two ends of the first connecting shaft 66 penetrate through the two second sliding grooves 75 respectively, first limiting wheels are mounted at two ends of the first connecting shaft 66 respectively, the two first limiting wheels are located in the two second limiting grooves 77 respectively and are in sliding fit, and the second cover plates 78 are fixedly mounted in the two second cover plate grooves 77 respectively.

As shown in fig. 2, 11, 12, 13, and 14, the locking mechanism includes a locking seat 81 and a locking member 86, the locking seat 81 is fixed in the second mounting groove 71, the front and rear sides of the locking seat 81 are respectively protruded with a second locking fixing seat 82, the two second locking fixing seats 82 are fixedly connected with the two first locking fixing seats 73 through fasteners, the left side of the locking seat 81 is provided with a third sliding groove 83, and the locking member 86 is located in the third sliding groove 83 and is in sliding fit with the third sliding groove 83; locking parts 87 are protruded on the left side surface of the locking member 86, two locking parts 87 are arranged in the front-back direction, and the two locking parts 87 on the locking member 86 are respectively connected with the two locking grooves 65 on the locking part 63 of the limiting member 6 in a plugging manner; the locking member 86 is returned by a spring.

As shown in fig. 2 to 10, the adjusting mechanism 9 includes a first connecting seat 98, a second connecting seat 41, a first adjusting plate 92 and two second adjusting plates 96, the first connecting seat 98 is fixedly connected in the first mounting groove 52 of the connecting member 5, the first connecting seat 98 has two first connecting arms, the first adjusting plate 92 includes two first adjusting plates 92, the two first adjusting plates 92 are respectively fixedly connected with the two first connecting arms, the second connecting seat 411 is fixedly connected with the supporting frame 4, the second connecting seat 41 has two second connecting arms, each second connecting arm has two second adjusting plates 96, the second connecting arms are located between the two second adjusting plates 96, in this embodiment, there are four second adjusting plates 96, the first adjusting plates 92 are hinged with the second adjusting plates 96, and the first adjusting plates 92 are located between two adjacent second adjusting plates 96. The first adjusting plate 92 is provided with a first adjusting hole 93, the first adjusting hole 93 comprises a circular through hole 931 and a triangular through hole 932, the circular through hole 931 and the triangular through hole 932 are communicated with each other, an arc-shaped limiting protrusion 933 is protruded at the transition position of the circular through hole 931 and the triangular through hole 932, the limiting protrusion 933 enables the transition position of the circular through hole 931 and the triangular through hole 932 to narrow rapidly, and the limiting protrusion 933 is located at one side close to the hinge joint position far away from the first adjusting plate 92 and the second adjusting plate 96; second adjusting hole 97 is formed in second adjusting plate 96, first adjusting hole 93 is aligned with second adjusting hole 97, one side of inner portion of second adjusting hole 97 is saw-tooth-shaped edge 971, and second adjusting hole 97 gradually narrows from saw-tooth-shaped edge 971 side. The adjusting mechanism 9 further includes an elastic spring 94 and a baffle 95, the elastic spring 94 is disposed in a circular through hole 931 of the first adjusting hole 93, one end of the elastic spring 94 extends into the triangular through hole 932, the spring 94 located in the circular through hole 931 bends to form an arc, the baffle 95 penetrates through the triangular through hole 932, two ends of the baffle 95 are located in two adjacent second adjusting holes 97 and are clamped with the sawtooth-shaped edge 971, and an extending end of the elastic spring 94 abuts against the baffle 95. The adjusting mechanism 9 further includes a buckle cover 91 disposed outside the second adjusting plate 96 for preventing the blocking plate 95 from being accidentally dropped. In an initial state, the supporting frame 4 of the lumbar support is at the maximum elevation angle, when the angle of the lumbar support is adjusted, the supporting frame 4 is folded, the supporting frame 4 drives the second connecting seat 41 to turn, the second connecting seat 41 drives the second adjusting plate 96 to turn, the sawtooth-shaped edge 971 of the second adjusting plate 96 pushes the baffle 95, the baffle 95 swings relative to the first adjusting plate 92, the baffle 95 applies pressure to the elastic reed 94 when acting, the elastic reed 94 stores force, and when the baffle 95 is separated from the clamping point of the current position, the elastic reed 94 releases the pushing of the baffle 95 to clamp the next clamping point, so that the inclination angle of the supporting frame 4 is changed. When the waist rest angle is reset, the inclination angle of the support frame 4 needs to be adjusted to be minimum, the support frame 4 is continuously folded, after the baffle 95 is separated from the last clamping point, the swinging angle of the baffle 95 in the circular through hole 931 in the first adjusting hole 93 reaches the maximum, then the baffle 95 is convenient to abut against the limiting protrusion 933, at the moment, the baffle 95 is clamped in the limiting protrusion 933 and the circular through hole 931 and cannot swing, and the elastic spring leaf 94 is in a force accumulation state; reversely lifting and folding the supporting frame 4, the supporting frame 4 driving the second connecting seat 41 to reversely turn, the second connecting seat 41 driving the second adjusting plate 96 to reversely turn, the second adjusting plate 96 not contacting with the sawtooth-shaped edge 971 in the second adjusting hole 97 in the process of reverse turning, when the supporting frame 4 is reset, the baffle 95 passes through the sawtooth-shaped edge 971, the second adjusting hole 97 pushes one end of the baffle 95 clamped with the limit bulge 933 to reset the baffle 95, and the elastic reed 94 releasing the pushing baffle 95 is clamped with the first clamping point.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (9)

1. The utility model provides a waist leans on regulation chair, leans on including tray (1), seat support (2), back of the chair (3) and waist, and tray (1) is including wobbling tailstock (11), and seat support (2) are fixed on tray (1), and back of the chair (3) are fixed on tailstock (11), its characterized in that: the waist is by including support frame (4), connecting piece (5), locating part (6) and mount pad (7), support frame (4) can be swung and install on connecting piece (5), the bottom of connecting piece (5) is articulated through articulated shaft (501) with back of the chair (3) or tailstock (11), the cover is equipped with torsional spring (59) that are used for reseing on articulated shaft (501), a torque arm of torsional spring (59) supports and presses on connecting piece (5), another torque arm of torsional spring (59) supports and presses in seat support (2) bottom, mount pad (7) and seat support (2) fixed connection, locating part (6) one end and mount pad (7) sliding connection, locating part (6) accessible locking mechanism fixes on mount pad (7), the other end and connecting piece (5) sliding fit of locating part (6).

2. A lumbar support adjustment chair as claimed in claim 1, wherein: the bottom of back of the chair (3) is protruding to have two articulated portions of second, and the bottom of connecting piece (5) is protruding to have two first articulated portions (56), and two first articulated portions (56) are located between two articulated portions of second and articulated through articulated shaft (501), and the cover is equipped with two torsional springs (59) on articulated shaft (501), and torsional spring (59) are located between first articulated portion (56).

3. A lumbar support adjustment chair as claimed in claim 1, wherein: the bottom of the mounting seat (7) is upwards sunken to form a second mounting groove (71), the second mounting groove (71) extends backwards through the mounting seat (7), one end of the limiting piece (6) is located in the second mounting groove (71), and the other end of the limiting piece (6) is slidably connected with the mounting seat (7) through a first connecting shaft (66).

4. A lumbar support adjustment chair as claimed in claim 3, wherein: and the left side and the right side of the second mounting groove (71) are respectively provided with a second sliding groove, and the two ends of the first connecting shaft (66) are in sliding fit with the second sliding grooves.

5. A lumbar support adjustment chair as claimed in claim 3, wherein: the top of the second mounting groove (71) protrudes downwards to form a limiting seat (74), the top of the limiting piece (6) is provided with a third limiting groove (65), and the limiting seat (74) is inserted into the third limiting groove (65) and is in sliding fit with the third limiting groove.

6. A lumbar support adjustment chair as claimed in claim 1, wherein: the locking mechanism comprises a locking piece (86), the locking piece (86) is in sliding fit with the mounting base (7), a locking portion (87) protrudes from the locking piece (86), a locking groove (64) is recessed from the limiting piece (6), the locking piece (86) slides to enable the locking portion (87) to be connected with the locking groove (64) of the limiting piece (6) in a plugging and pulling mode, and then the limiting piece (6) is fixed.

7. A lumbar support adjustment chair as claimed in claim 1, wherein: the angle adjusting device further comprises an adjusting mechanism (9), and the adjusting mechanism (9) is used for adjusting the angle between the connecting piece (5) and the supporting frame (4).

8. A lumbar support adjustment chair as claimed in claim 7, wherein: the adjusting mechanism (9) comprises a first connecting seat (98), a second connecting seat (41), a first adjusting plate (92) and a second adjusting plate (96), the first connecting seat (98) is fixedly connected with the connecting piece (5), the second connecting seat (41) is fixedly connected with the supporting frame (4), the first connecting seat (98) is fixedly connected with the first adjusting plate (92), the second connecting seat (41) is fixedly connected with the second adjusting plate (96), the first adjusting plate (92) is hinged with the second adjusting plate (96), a first adjusting hole (93) is arranged in the first adjusting plate (92), a second adjusting hole (97) is arranged on the second adjusting plate (96), the first adjusting hole (93) is aligned with the second adjusting hole (97), a mutually-butted elastic reed (94) and a baffle (95) are arranged in the first adjusting hole (93), the baffle (95) extends into the second adjusting hole (97), one side of the second adjusting hole (97) is a sawtooth-shaped edge (971), one end of the baffle (95) is clamped with the sawtooth-shaped edge (971), the second adjusting hole (97) extends into the second adjusting hole (971) from one side of the sawtooth-shaped edge, and the second adjusting hole (971) is clamped with the baffle (97), and the narrow side of the baffle (971).

9. A lumbar support adjustment chair as claimed in claim 8, wherein: two second adjusting plates (96) are installed on the second connecting seat (41), the first adjusting plate (92) is located between the second adjusting plates (96), the two adjusting plates further comprise two buckle covers (91), and the two second adjusting plates (96) are located between the two buckle covers (91) and are fixedly connected.

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