CN220458960U - A elasticity canceling release mechanical system and seat of leaning on for seat - Google Patents

Abstract

The utility model provides a tilting elastic reset mechanism for a seat and the seat, comprising: the chair body, transversely establish the girder in the chair body below, the chair body includes integrated into one piece's back of body frame and seat frame, and the seat frame includes the seat frame lateral part that bilateral symmetry set up, is equipped with the support frame that is used for holding seat frame lateral part at the girder tip, just the seat frame can rotate with the support frame jointly around the girder, the girder is hollow cylinder be equipped with elasticity reset assembly between support frame and the girder, elasticity reset assembly include bar elastomer, bar elastomer alternate in the girder, just bar elastomer and girder are fixed relatively in circumference direction, the tip of bar elastomer is connected to the support frame, when the support frame rotates along with the seat frame, impels bar elastomer takes place torsional deformation in order to produce reset elasticity. The strip-shaped elastic body is hidden in the main beam, so that the appearance is not affected.

Description

A elasticity canceling release mechanical system and seat of leaning on for seat

Technical Field

The utility model relates to the field of seats, in particular to a tilting elastic reset mechanism for a seat and the seat.

Background

In the seat of daily use, the back of the chair generally includes fixed and adjustable angle formula, but adjustable angle formula also mostly refers to the inclination angle of back of the chair adjustable for provide different supporting angle and correspond different riding demands, but this kind of seat is based on the seat that has the chassis structure, because there is sufficient space to set up adjusting device in the chassis, when the seat does not have the chassis, then be difficult to set up adjusting device and adjust seat pitch angle, even have some seats to set up adjusting device in the back of the chair department, but this kind of adjusting device is the exposure formula mostly, and adjusting device structure is complicated, preparation and cost of maintenance are high, the use experience is also comparatively poor, can't satisfy user's daily use demand.

For example, in the patent of the chair back adjusting and pitching mechanism of CN 203354035, the adjustable mechanism 30 is exposed, and the appearance is bulky, which affects the overall aesthetic property of the chair; while more than eight parts constituting the adjustable mechanism 30 are complicated, involving the cooperation of the spring element 31, the first spring mounting hole 123 and the second spring mounting hole 211, the boss 24 on the rotary member 23 being inserted into the stopper member 32, etc.; in addition, there is a circle of teeth outside the rotating member 23, and the manufacturing cost of the part is very high no matter the part is opened or the tooth surface is machined, so that the replacement and maintenance of the part are difficult for a user, and the use experience is poor.

For this purpose, the applicant has found, through a beneficial search and study, a solution to the above-mentioned problems, against which the technical solutions to be described below are developed.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide the tilting elastic reset mechanism for the seat, which comprises a seat frame, a support rod and an elastic reset component arranged between the seat frame and the support rod, wherein torsion is provided only through a spring steel bar which simultaneously passes through a front support rod and the support rod in the elastic reset component, so that the tilting elastic reset mechanism realizes free switching between a front tilting elastic torsion state and a reset state, and the structure is simple and practical and does not occupy redundant space.

Still further, the present utility model provides a seat comprising the above-mentioned reclining elastic return mechanism and two symmetrical leg assemblies, and the front-rear pitch adjusting effect of the seat can be achieved by a simple structure of the mechanism.

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

a reclining elastic return mechanism for a seat, comprising:

the chair body, transversely establish the girder that is used for supporting the chair body below the chair body, the chair body include integrated into one piece's back of body frame and seat frame, the seat frame include the seat frame lateral part that bilateral symmetry set up, be equipped with the support frame that is used for holding seat frame lateral part at the girder tip, just the seat frame can wind jointly with the support frame the girder rotates, the girder is hollow cylinder be equipped with elasticity reset assembly between support frame and the girder, elasticity reset assembly include the bar elastomer, the bar elastomer alternate in the girder, just bar elastomer and girder are fixed relatively in circumference direction, the tip of bar elastomer is connected to the support frame, when the support frame rotates along with the seat frame, impel the bar elastomer takes place torsional deformation in order to produce reset elasticity.

Preferably, the support frame comprises a front support rod and a rear support rod, wherein the front support rod extends obliquely forwards along the radial direction from the main beam, the rear support rod extends obliquely backwards along the radial direction from the main beam, the upper ends of the front support rod and the rear support rod are respectively connected to corresponding positions of the side parts of the seat frame,

preferably, the strip-shaped elastic body and the main beam are kept relatively fixed in the circumferential direction: the main beam is internally fixed with a fixing plate, the fixing plate is provided with an avoidance hole, the strip-shaped elastic body is penetrated through the avoidance hole of the fixing plate, and the shape of the avoidance hole is configured to enable the strip-shaped elastic body not to rotate relative to the fixing plate, so that a stress point is provided for the strip-shaped elastic body to twist.

Preferably, the tail end of the front stay bar is sleeved on the main beam, an end plate which caters for the insertion of the strip-shaped elastic body is arranged at the tail end of the front stay bar, a slot is formed in the end plate, the strip-shaped elastic body is inserted in the slot, and when the front stay bar drives the end plate to rotate, the strip-shaped elastic body is twisted and deformed to generate reset elastic force.

Preferably, the tail end of the front stay bar is sleeved on the main beam through a second sleeve pipe formed integrally, a second notch is formed in the second sleeve pipe, a second screw hole is preset in a corresponding position on the main beam, a second limit screw penetrates into the second screw hole, the second limit screw is positioned in the second notch, and the second limit screw and the second notch are matched to limit the rotation range of the front stay bar.

Preferably, the tail end of the rear stay bar is sleeved on the main beam through a first sleeve pipe formed integrally, a first notch is formed in the first sleeve pipe, a first screw hole is preset in the main beam, a first limit screw penetrates into the first screw hole, the first limit screw is positioned in the first notch, and the first limit screw and the first notch are matched to limit the rotation range of the rear stay bar.

Preferably, the strip-shaped elastic body is a flat strip-shaped elastic body, the width of the strip-shaped elastic body is 0.8-1.8cm, the thickness of the strip-shaped elastic body is 0.4-1.4cm, and the flat design can be easily twisted to generate reset elastic force.

Preferably, the front stay is configured to rotate about the main beam in a range of 3-8 degrees.

Still further provided is a seat, the seat at least comprises two symmetrical leg assemblies and a tilting elastic reset mechanism of the seat, the upper ends of the leg assemblies are provided with mounting openings, the two ends of the main beam are respectively mounted at the corresponding mounting openings, and the main beam is kept relatively fixed relative to the leg assemblies in the circumferential direction.

The chair leg assembly of the chair comprises two chair legs which incline in opposite directions, the upper ends of the chair legs are intersected and integrally formed, and the mounting opening is formed at the intersection of the upper ends of the chair legs.

The principle and beneficial effects of the utility model adopting the technical scheme are as follows:

the utility model aims at providing a tilting elastic reset mechanism for a seat, which comprises a seat body and a main beam transversely arranged below the seat body and used for supporting the seat body, wherein a strip-shaped elastic body is arranged in the main beam, so that the tilting elastic reset mechanism generates two states: an elastic torsion state and a reset state; when the seat frame is inclined forwards and backwards by external force, the strip-shaped elastic body is subjected to torsion of the supporting frame and deforms to generate torsion elastic force, so that the tilting elastic reset mechanism enters an elastic torsion state, when the external force on the seat frame is removed, the seat frame is reset by the torsion elastic force, and then the tilting elastic reset mechanism enters a reset state.

Drawings

FIG. 1 is an enlarged schematic view of a limiting clip board being snapped into a limiting groove in an embodiment;

FIG. 2 is an enlarged schematic view of the limiting clip falling out of the limiting groove in the embodiment;

FIG. 3 is an exploded view of the tilt spring return mechanism according to the embodiment;

FIG. 4 is a partial cross-sectional view of the resilient return assembly of the tilt resilient return mechanism of the embodiment;

FIG. 5 is an exploded view of the embodiment of the tilt spring return mechanism where the spring return assembly is mounted;

FIG. 6 is a schematic structural view of a rear stay;

FIG. 7 is a schematic view of the main beam structure;

FIG. 8 is a schematic structural view of a front stay;

FIG. 9 is a schematic view of a structure of a shaft sleeve according to an embodiment;

FIG. 10 is an exploded view of the mounting of the support shaft of the front stay to the seat frame in an embodiment;

FIG. 11 is an enlarged view of the mounting slot at the side of the bezel;

FIG. 12 is a schematic view of the tilt spring return mechanism connected to the frame;

FIG. 13 is a partial cross-sectional view of the mounting of the support shaft of the front stay to the seat frame in an embodiment;

FIG. 14 is a cross-sectional view of the mounting of the support shaft of the front stay in the embodiment;

FIG. 15 is a diagram showing the comparison between the reset state and the elastic state of the tilt elastic reset mechanism according to the embodiment;

the reference numerals are as follows: 1-main beam, 2-adjusting spanner, 3-strip elastic body, 4-torsion spring, 5-chair leg component, 6-protecting cover, 7-supporting frame, 7 a-front supporting rod, 7 b-rear supporting rod, 8-shaft sleeve, 9-second threaded fastener, 10-first threaded fastener, 11-first limit screw, 12-second limit screw, 13-seat frame, 14-back frame, 15-protecting cover, 16-threaded fastener, 17-sealing cover, 101-first screw hole, 102-second screw hole, 103-inner lining plate, 104-avoiding hole, 105-mounting chute, 106-inserting section, 201-countersunk through hole, 202-connecting part, 203-operating part, 204-spanner plate, 7b 1-third screw hole, 7b 2-first notch, 7b 3-first sleeve, 7b 4-limit clip, 61-through hole c,7a 1-second notch, 7a 2-fourth screw hole, 7a 3-end cap, 7a 4-slot, 7a 5-second sleeve, 7a 6-mounting screw hole, 7a 7-tangential plane, 7a 8-support shaft, 7a 9-milling part, 7a 10-limit plate, 7a 11-annular gap, 81-through hole a, 82-through hole b, 83-inner cylinder surface, 131-limit groove, 132-seat frame side, 133-through notch, 134-insertion notch, 135-mounting groove, 136-open groove

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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

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

The specific embodiments of the present utility model are as follows:

example 1: as shown in fig. 1-8, the present embodiment provides a tilting elastic reset mechanism, which is applied to a seat, and the tilting elastic reset mechanism includes a seat body, and a main beam 1 horizontally arranged below the seat body and used for supporting the seat body, in the seat, the main beam 1 is a hollow cylinder, the main beam 1 is supported at the upper end positions of two bilaterally symmetrical leg assemblies 5, and the seat frame 13 and the back frame 14 are of an integrated structure, so that the two can synchronously act, a group of elastic reset assemblies are symmetrically arranged at two ends of the main beam 1, the elastic reset assemblies include strip-shaped elastic bodies 3, and the strip-shaped elastic bodies 3 are inserted into the main beam 1; the seat frame 13 comprises seat frame side parts 132 which are symmetrically arranged left and right, a support frame 7 for supporting the seat frame side parts 132 is arranged at the end part of the main beam 1, and the seat frame 13 and the support frame 7 can rotate around the main beam 1 together; the key utility model is that when the seat frame 13 is acted by external force, the support frame 7 rotates along with the seat frame 13, so that the strip-shaped elastic body 3 is twisted to generate reset elastic force, and when the external force on the seat frame 13 is removed, the seat frame 13 is reset by the torsional elastic force.

As shown in fig. 3-14, the support frame 7 includes a front stay 7a and a rear stay 7b, the front stay 7a extends obliquely forward from the main beam 1 in the radial direction, the rear stay 7b extends obliquely backward from the main beam 1 in the radial direction, the upper ends of the front stay 7a and the rear stay 7b are respectively connected to corresponding positions of the seat frame side 132, if the seat is not considered to be folded, the upper ends of the front stay 7a and the rear stay 7b can be fixedly connected to corresponding positions of the seat frame side 132 through fasteners, but in order to improve the use experience of the user, the front stay 7a is configured to be rotatable around the seat frame 13, for example, the connection between the front stay 7a and the seat frame 13 is achieved by: the seat frame side 132 is preset with a mounting groove 135, a preset and penetrating insertion notch 134 is arranged below the mounting groove 135, the upper end part of the front supporting rod 7a, which is connected with the seat frame 13, extends forwards and is provided with a supporting shaft 7a8, the supporting shaft 7a8 and the front supporting rod 7a are kept relatively fixed and can not rotate relatively, for example, the support shaft 7a8 is provided with two sections 7a7 symmetrically by a welding mode, so that a milling part 7a9 is formed at the section 7a7, and the section 7a7 is arranged so that the supporting shaft 7a8 can pass through the insertion notch 34; when the seat frame side portion 132 inserts the milled flat portion 7a9 into the mounting groove 135 through the insertion notch 134 along the tangential plane 7a7 direction, and the milled flat portion 7a9 rotates in the mounting groove 135, the insertion notch 134 is not aligned with the milled flat portion 7a9 direction, and the support shaft 7a8 cannot be separated from the mounting groove 135 from the insertion notch 134, thereby completing the connection of the front stay 7a and the seat frame 13.

Next, after the front stay 7a is connected to the seat frame 13, the seat frame 13 is rotatable with respect to the front stay 7a, but in order not to align the insertion slot 134 of the seat frame 13 with the milled portion 7a9 of the front stay 7a, the seat frame 13 is separated from the front stay 7a, and the rotation angle is limited, and this limiting process is implemented as follows: an open slot 136 is provided at the upper end of the seat frame side 132, the lower end of the open slot 136 communicates with the installation slot 135 through a through slot 133, a mounting screw hole 7a6 is preset on the tangential surface 7a7 of the front stay 7a, a threaded fastener 16 is threaded into the mounting screw hole 7a6 through the through slot 133, and the rotation angle of the seat frame 13 is limited by limiting the length of the through slot 133.

As shown in fig. 5-15, the tail end of the front stay bar 7a is sleeved on the main beam 1 through the integrally formed second sleeve 7a5, and of course, the front stay bar 7a can be designed to be relatively fixed with the supporting beam in the circumferential direction, but in the actual use process, in order to improve the sitting experience of a user, the front stay bar 7a is configured to be capable of rotating by a small angle of 3-8 degrees, so that the seat frame 13 and the front stay bar 7a can integrally rotate, and the forward and backward leaning and leaning functions are realized; specifically, the method is configured in the following way: a second notch 7a1 is formed in the second sleeve 7a5, a second screw hole 102 is preset at a corresponding position on the main beam 1, a second limit screw 12 is penetrated into the second screw hole 102, and the second limit screw 12 is positioned in the second notch 7a 1; in this way, the second limiting screw 12 axially fixes the front stay bar 7a on the main beam 1, and the rotation range of the front stay bar 7a is limited by the cooperation with the second notch 7a1, that is, the rotatable angle of the front stay bar 7a is determined by the length of the second notch 7a1, and it is worth mentioning that the length of the second notch 7a1 is smaller than that of the first notch 7b2, so that the seat frame 13 can still rotate back and forth at a slight angle along the circumferential direction of the main beam 1 when the tilting elastic reset mechanism enters the supporting state, thereby giving the user the most comfortable experience.

As shown in fig. 4 to 7, in order to make the front stay bar 7a have a certain pretightening force when rotating and to facilitate the resetting, a certain elastic pretightening force needs to be added to the front stay bar 7a, and the front stay bar is realized by the following modes: as shown in fig. 5 and 7, the main beam 1 is a hollow cylinder, a strip-shaped elastic body 3 is penetrated in the main beam 1, a lining plate 103 is fixedly arranged in the main beam 1 in advance, a avoiding hole 104 is formed in the lining plate 103, the strip-shaped elastic body 3 penetrates through the avoiding hole 104 of the lining plate 103, so that the strip-shaped elastic body 3 is circumferentially fixed in the main beam 1, and the structural strength of the whole main beam 1 is increased.

As shown in fig. 4-8, when the front stay 7a is installed, the strip-shaped elastic body 3 passes through the preset slot 7a4 on the tail end plate 7a3 of the front stay 7 a; specifically, the section of the strip-shaped elastic body 3 is flat, the front supporting rod 7a is sleeved on the cross beam 1 through a second sleeve 7a5 formed at the tail part, one end of the second sleeve 7a5 is opened, the end plate 7a3 is formed at the other end of the second sleeve 7a5, namely the same side end of the front supporting rod 7a, the end part of the cross beam 1 forms a section of inserting section 106 which is in inserted fit with the second sleeve 7a5, at least one installation chute 105 is formed on the inserting section 106 along the axial direction of the cross beam 1, the initial end of the installation chute 105 corresponds to the end head of the cross beam 1 and is opened, the end of the installation chute 105 extends towards the middle part of the cross beam 1, and the installation chute 105 is inclined in a spiral shape from the initial end to the end, namely the installation chute 105 deflects along the circumferential direction; the end plate 7a3 does not seal the cylinder mouth of the second sleeve 7a5 completely, one part of the circumference of the end plate 7a3 is connected with the front supporting rod 7a and is integrally formed, a limiting plate 7a10 which can be inserted into the mounting chute 105 is formed at the joint of the end plate 7a3 and the front supporting rod 7a, an annular gap 7a11 is formed between the other part of the circumference of the end plate 7a3 and the inner wall of the second sleeve 7a5, when the second sleeve 7a5 is sleeved with the cross beam 1, the strip-shaped elastic body 3 is firstly inserted into the slot 7a4 on the end plate 7a3, the limiting plate 7a10 is gradually inserted into the mounting chute 105, the inserting section 106 is inserted into the annular gap 7a11, the limiting plate 7a10 is guided by the mounting chute 105 and is deflected by a certain angle relative to the rectangular avoidance hole 104 of the inner lining plate 103 along the circumference along with the gradual penetration of the second sleeve 7a5, so that the strip-shaped elastic body 3 is twisted to generate pretightening force, the width of the limiting plate 7a10 is smaller than the width of the tail end of the mounting chute 105, and the allowance is left for the rotation of the front supporting rod 7a relative to the cross beam 1; the cooperation of the second limit screw 12 and the second notch 7a1 can maintain the pre-tightening elasticity; that is to say that the strip-shaped elastic body 3 is slightly twisted by the front stay 7a, and a certain pretightening force is provided.

When the tilting elastic reset mechanism is in a reset state, the seat frame 13 can rotate together with the front supporting rod 7a, and the front supporting rod 7a can more easily make the strip-shaped elastic body 3 generate torsion deformation when rotating due to the existence of pretightening force during installation, so as to generate reset elastic force of the seat frame 13.

As shown in fig. 10-14, the seat frame 13 can rotate relative to the front stay 7a, a sheath 15 can be installed at the milling part 7a9 of the front stay 7a, and by wrapping the sheath 15, not only the rotation abrasion between the support shaft 7a8 on the front stay 7a and the installation groove 135 of the seat frame side part 132 can be reduced, but also the installation cooperation between the support shaft 7a8 and the installation groove 135 can be more compact.

As shown in fig. 3, 4 and 8, a pair of protecting covers 6 which are symmetrical left and right can be further arranged, the protecting covers 6 are decorative plates made of plastics, a through hole c61 is arranged on each protecting cover 6, a fourth screw hole 7a2 is preset on the front supporting rod 7a, and a second threaded fastener 9 penetrates through the through hole c61 and is screwed into the fourth screw hole 7a2; therefore, when the protecting cover 6 and the front supporting rod 7a synchronously move, the function of shielding decoration is achieved, part of dust can be effectively prevented from entering the tilting elastic reset mechanism, and the normal operation of the tilting elastic reset mechanism is ensured.

As shown in fig. 2-7, the rear stay bar 7b is connected with the seat frame 13 and rotatable relative to the main beam 1, specifically, a limit groove 131 is obliquely arranged on the bottom surface of the side portion 132 of the seat frame, a limit clamping plate 7b4 matched with the limit groove 131 is bent and formed at the upper end of the rear stay bar 7b, when the rear stay bar 7b rotates under the action of external force, the limit clamping plate 7b4 is inserted into the limit groove 131, the rest rear stay bar 7b of the front stay bar 7a forms stable support for the seat frame 13, and when the limit clamping plate 7b4 leaves the limit groove 131, the seat frame 13 can rotate around the front stay bar 7 a.

Specifically, the external force of the rear stay bar 7b is controlled by connecting the rear stay bar 7b with the adjusting wrench 2, and the limiting clamping plate 7b4 can be selectively matched with the limiting groove 131 under the action of the adjusting wrench 2, so that the tilting elastic reset mechanism forms a supporting state and a releasing state.

The supporting state of the seat frame 13 is realized as follows: when the limiting clamping plate 7b4 is clamped in the limiting groove 131 preset below the seat side rod 132 which is bilaterally symmetrical on the seat frame 13, the limiting groove 131 limits the limiting clamping plate 7b4 to be separated, and the seat frame 13 is stably supported.

The disengagement state of the seat frame 13 is realized in such a way that: when the seat frame 13 needs to be disconnected, the adjusting spanner 2 is pulled to drive the rear supporting rod 7b to rotate, so that the limiting clamping plate 7b4 on the rear supporting rod 7b is separated from the limiting groove 131, the seat frame 13 connected with the upper end of the front supporting rod 7a loses the supporting point provided by the rear supporting rod 7b, and the seat frame 13 can rotate relative to the front supporting rod 7a to adjust the position.

The reset state of the bezel 13 is achieved as follows: because the limit groove 131 is obliquely arranged and is limited by the arc-shaped rotation track of the seat frame or the rear supporting rod 7b, the limit groove 131 is difficult to clamp into, as shown in fig. 1-2, when the seat frame 13 needs to be reset, the adjusting spanner 2 needs to be rotated again, so that the limit clamping plate 7b4 avoids the seat frame 13 and is clamped into the limit groove 131, and the tilting elastic reset mechanism enters the supporting state again.

Still further, as shown in fig. 2 and 3, the adjusting wrench 2 controls the rear stay 7b such that the adjusting wrench 2 includes an operation portion 203 and a connection portion 202 formed at an end portion of the operation portion 203, the operation portion 203 is disposed along the axial direction of the main beam 1, the connection portion 202 is connected to the rear stay 7b, and the operation portion 203 is pulled to rotate the rear stay 7b by the connection portion 202; the third screw hole 7b1 is preset on the rear supporting rod 7b, the countersunk through hole 201 is preset on the connecting portion 202, and the first threaded fastener 10 is screwed into the third screw hole 7b1 on the rear supporting rod 7b through the countersunk through hole 201, so that the adjusting spanner 2 is in rotary connection with the rear supporting rod 7 b.

More specifically, the operation portion 203 and the connection portion 202 are made of plastic, the operation portion 203 is an arc plate attached to the outer wall of the main beam 1, and the arc plate is disposed along the length direction of the main beam 1; a wrenching plate 204 is formed at the edge of the middle position of the arc plate, and the operating part 203 rotates around the main beam 1 so that the connecting part 202 drives the rear stay bar 7b to rotate; the arc-shaped plate is attached to the outer side of the main beam 1, so that the space is not occupied additionally, the main beam 1 is skillfully utilized as a rotating support, and a rotating shaft is not required to be arranged additionally.

As shown in fig. 10, a cover 17 is detachably disposed at the notch position of the open slot 136, and the cover 17 is used for closing the open slot 136, preventing dust from entering the open slot 136 and maintaining the integrity of the appearance of the seat frame 13.

As shown in fig. 4 to 5, an elastic member, for example, a torsion spring 4 is disposed between the main beam 1 and the rear stay 7b, one elastic arm of the torsion spring 4 acts on the front stay 7a, and the front stay 7a is kept relatively fixed, the other elastic arm of the torsion spring 4 acts on the rear stay 7b, that is, abuts against the outer side of the rear stay 7b, and the torsion spring 4 makes the rear stay 7b always have a rotation tendency of being clamped into the limiting groove 131, so that the structure of the seat frame 13 is more stable when in a supporting state.

As shown in fig. 3-7, the tail end of the rear stay bar 7b is sleeved on the main beam 1 through a first sleeve 7b3 formed integrally, a first notch 7b2 is formed in the first sleeve 7b3 in order to limit the rotation angle of the rear stay bar 7b, a first screw hole 101 is preset in the main beam 1, a first limit screw 11 penetrates into the first screw hole 101, and the first limit screw 11 is positioned in the first notch 7b 2; the first limit screw 11 thus limits the axial movement of the rear stay 7b on the main beam 1, and also limits the range of rotation of the rear stay 7b by cooperating with the first notch 7b2, i.e. the rotatable angle of the rear stay 7b is determined by the length of said first notch 7b 2.

Example 2: the difference between this embodiment and embodiment 1 is that, in addition to the front stay bar 7a and the rear stay bar 7b being directly installed on the main beam 1, as shown in fig. 9, a shaft sleeve 8 may be added on the installation surface of the main beam 1 and the front stay bar 7a, the shaft sleeve 8 is sleeved on the main beam 1, and the inner cylinder surface 83 at the end of the shaft sleeve 8 abuts against the end of the main beam 1; the shaft sleeve 8 is provided with a through hole a81 and a through hole b82, the first limit screw 11 penetrates through the through hole a81, and the second limit screw 12 penetrates through the through hole b82, so that the main beam 1 and the shaft sleeve 8 are fixed together, the tilting elastic reset mechanism is compact in structure, the front supporting rod 7a and the rear supporting rod 7b are separated from the main beam 1, and abrasion between the front supporting rod and the rear supporting rod is reduced.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (11)

1. A reclining elastic return mechanism for a seat, comprising: the chair body, transversely establish girder (1) that are used for supporting the chair body below the chair body, the chair body include integrated into one piece's back of body frame (14) and seat frame (13), seat frame (13) include seat frame lateral part (132) that bilateral symmetry set up, be equipped with support frame (7) that are used for holding seat frame lateral part (132) at girder (1) tip, just seat frame (13) can wind jointly with support frame (7) girder (1) rotates, girder (1) are hollow cylinder, are equipped with the elasticity subassembly that resets between support frame (7) and girder (1), elasticity subassembly that resets include bar elastomer (3), bar elastomer (3) alternate in girder (1), and bar elastomer (3) are fixed relatively in circumference direction with girder (1), when support frame (7) rotate along with seat frame (13), make bar elastomer (3) take place torsional deformation in order to produce reset elasticity.

2. A reclining elastic return mechanism for a seat according to claim 1, wherein: the support frame (7) comprises a front support rod (7 a) and a rear support rod (7 b), wherein the front support rod (7 a) extends obliquely forwards from the main beam (1) along the radial direction, the rear support rod (7 b) extends obliquely backwards from the main beam (1) along the radial direction, and the upper ends of the front support rod (7 a) and the rear support rod (7 b) are respectively connected to corresponding positions of the side parts (132) of the seat frame.

3. A reclining elastic return mechanism for a seat according to claim 1, wherein: the strip-shaped elastic body (3) and the main beam (1) are kept relatively fixed in the circumferential direction, namely: a fixing plate (103) is fixedly arranged in the main beam (1), an avoidance hole (104) is formed in the fixing plate (103), the strip-shaped elastic body (3) penetrates through the avoidance hole (104) of the fixing plate (103), and the shape of the avoidance hole (104) is configured to enable the strip-shaped elastic body (3) to be incapable of rotating relative to the fixing plate (103).

4. A reclining elastic return mechanism for a seat according to claim 2, wherein: the tail end of the front stay bar (7 a) is sleeved on the main beam (1), an end plate (73) which caters for the insertion of the strip-shaped elastic body (3) is arranged at the tail end of the front stay bar (7 a), a slot (74) is formed in the end plate (73), the strip-shaped elastic body (3) is inserted in the slot (74), and when the front stay bar (7 a) drives the end plate (73) to rotate, the strip-shaped elastic body (3) is twisted and deformed to generate reset elastic force.

5. A reclining elastic return mechanism for a seat according to claim 2, wherein: the tail end of the front stay bar (7 a) is sleeved on the main beam (1) through a second sleeve (7 a 5) formed integrally, a second notch (7 a 1) is formed in the second sleeve (7 a 5), a second screw hole (102) is reserved in a corresponding position on the main beam (1), a second limit screw (12) penetrates into the second screw hole (102), the second limit screw (12) is positioned in the second notch (7 a 1), and the second limit screw (12) is matched with the second notch (7 a 1) to limit the rotation range of the front stay bar (7 a).

6. A reclining elastic return mechanism for a seat according to claim 2, wherein: the tail end of the rear stay bar (7 b) is sleeved on the main beam (1) through a first sleeve (7 b 3) formed integrally, a first notch (7 b 2) is formed in the first sleeve (7 b 3), a first screw hole (101) is preset in the main beam (1), a first limit screw (11) penetrates into the first screw hole (101), the first limit screw (11) is positioned in the first notch (7 b 2), and the first limit screw (11) is matched with the first notch (7 b 2) to limit the rotation range of the rear stay bar (7 b).

7. A reclining elastic return mechanism for a seat according to claim 1, wherein: the strip-shaped elastic body (3) is a flat strip-shaped elastic body, the width of the strip-shaped elastic body (3) is 0.8-1.8cm, and the thickness of the strip-shaped elastic body (3) is 0.4-1.4cm.

8. The reclining elastic return mechanism for a seat according to claim 4, wherein: the front stay (7 a) is configured to be rotatable about the main beam (1) in a range of 3-8 degrees.

9. A reclining elastic return mechanism for a seat according to claim 1, wherein: the supporting frames (7) are arranged at the left end and the right end of the main beam (1) in pairs.

10. A seat, characterized by: the chair leg assembly comprises two symmetrical chair leg assemblies (5) and the tilting elastic resetting mechanism for the chair according to claim 1, wherein mounting openings are formed in the upper ends of the chair leg assemblies (5), two ends of the main beam (1) are respectively mounted at the corresponding mounting openings, and the main beam (1) is relatively fixed relative to the chair leg assemblies (5) in the circumferential direction.

11. A seat as claimed in claim 10, wherein: the chair leg assembly (5) comprises two chair legs which incline in opposite directions, the upper ends of the chair legs are intersected and integrally formed, and the mounting opening is formed at the intersection of the upper ends of the chair legs.