Multi-angle self-adaptive double-waist support mechanism

Abstract

The utility model relates to a multi-angle self-adaptive double-waist support mechanism, which is characterized by comprising a base for fixing a seat, a connecting seat is connected onto the base, one end of the connecting seat is rotatably connected onto the base, the other end of the connecting seat extends upwards to serve as a connecting end, connecting arms extending towards two sides are arranged at the connecting end, and the connecting arms are connected with the connecting seat. The connecting arm is rotationally connected with a waist support, and when a user leans on the waist support, the waist support twists left and right by taking the joint of the waist support and the connecting arm as a rotating center, and meanwhile, the waist support twists up and down by taking the joint of the waist support and the base as a rotating center through the connecting seat so as to be matched with the physiological curve of the waist. The utility model has the following advantages and effects: the waist belt can be matched with the physiological curve of the waist, and the wrapping property on the waist is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair technical field, concretely relates to a multi-angle adaptive double waist support mechanism. BACKGROUND

[0002] The seat is a kind of furniture widely used in daily life, work, and there are many kinds, and the functions are various, meet different use demands, and in order to improve the comfort of chair, waist support will be installed on seat, and waist support gradually upgrades from single waist support structure to double waist support structure after development, and double waist support structure has stronger wrapping property to the waist of user compared with single waist support structure, forms the effect of wrapping waist, improves the comfort of overall use, and is widely favored.

[0003] For example, the Chinese patent technical document with the announcement number CN220384681U discloses a double-shaft rotating type three-zone waist supporting mechanism, comprising a support and a pair of left and right symmetrical auxiliary waist supports arranged on the front side of the support, each of the two auxiliary waist supports is connected with a main waist support through a central shaft, and the two central shafts are symmetrically distributed on the back of the main waist support, and the main waist support can twist left and right around the central shaft.

[0004] From the above disclosed content, when the user leans on the seat, the waist supports on both sides can be stressed to twist left and right around the central shaft, so that the waist supports can fully wrap the waist to improve the comfort of use.

[0005] However, the present inventor found in the actual use that, due to the physiological curve of human waist, and the physiological curve of human body of different body shape exists difference, and the above-mentioned waist support can only produce left and right direction twist, so that the angle of waist support cannot be adapted to the physiological curve of human waist, thus there is certain limitation to the wrapping property of waist. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a multi-angle adaptive double waist support mechanism, which can be adapted to the physiological curve of waist and improve the wrapping property of waist.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a multi-angle adaptive double waist support mechanism, comprising a base for fixing a seat, a connecting seat is connected to the base, one end of the connecting seat is rotatably connected to the base, and the other end extends upward as a connecting end, the connecting end is provided with connecting arms extending to both sides respectively, and the connecting arms are rotatably connected with waist supports, when the user leans on the waist supports, the waist supports produce left and right twist with the connecting part of the connecting arms as the center of rotation, and at the same time, the connecting seat produces up and down twist with the connecting part of the base as the center of rotation, to adapt to the physiological curve of waist.

[0008] The utility model further sets up: be equipped with the mounting groove on the connecting arm, be equipped with the rotating guide pipe that extends upwards in the mounting groove, the rotating guide pipe outer periphery is equipped with the connecting sleeve pipe, the connecting sleeve pipe can rotating guide pipe be rotating center in the mounting groove, the waist support is fixed in the connecting sleeve pipe.

[0009] The utility model further sets up: be equipped with the center symmetry limit block in the mounting groove, the bottom of connecting sleeve pipe is equipped with the limit slot opposite limit block.

[0010] The utility model further sets up: be equipped with the torsional spring between the mounting groove and connecting sleeve pipe, the torsional spring is the waist support to with the connecting arm's junction as rotating center provides resistance when producing left and right torsion.

[0011] The utility model further sets up: be equipped with the first connecting groove and second connecting groove of the end of torsional spring's connection respectively in the mounting groove and connecting sleeve pipe inner wall.

[0012] The utility model further sets up: the side of connecting seat towards base is equipped with the let room slot, the let room slot is used to prevent the rotation of connecting seat towards base, and the rotation of base to connecting seat produces interference.

[0013] The utility model further sets up: be equipped with the spring between connecting seat and base, one end of spring is fixed in the groove bottom of let room slot, and one end is fixed in base.

[0014] Compared with prior art, the utility model has the advantages of:

[0015] Since the rotatable connecting seat is arranged on the base, and the waist support is connected to the connecting seat through the connecting arm, the waist support and the connecting seat of the base can be connected, so that when the user leans on the seat, the waist support can be stressed in the present scheme, and the waist support can be twisted up and down through the connecting seat with the connecting part of the base as the rotating center while being twisted left and right, so that the waist support can be adjusted at multiple angles, thereby facilitating the adaptation to the physiological curve of the waist and improving the wrapping of the waist. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is whole structure schematic diagram of the utility model;

[0017] Fig. 2 It is explosion structure schematic diagram of the utility model;

[0018] Fig. 3 It is specific structure schematic diagram of connecting seat in the utility model;

[0019] Fig. 4 It is specific structure schematic diagram of connecting sleeve pipe in the utility model. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] As Figs. 1 to 4 The utility model discloses a multi-angle adaptive double waist support mechanism, including base 1, this base 1 is used to fix seat, so realize the connection between waist support 4 mechanism and seat, the connecting seat 2 is connected on the base 1, the connecting seat 2 one end rotationally connected in base 1, one end extends as connecting end along upper, in addition, it needs to be explained that the extension length of the extension length of connecting end can be extended, to improve the stroke of the waist support 4 described below and twist up and down;

[0023] The connecting end is equipped with the connecting arm 3 that extends respectively to both sides, by connecting the waist support 4 respectively on the connecting arm 3 that extends to both sides, the double waist support structure can be realized, specifically, the waist support 4 is rotationally connected with the connecting arm 3 through the connecting structure described below, since the rotatable connecting seat 2 is arranged on the base 1, and the waist support 4 is connected with the connecting seat 2 through the connecting arm 3, so the connecting seat 2 of the base 1 can be realized for the waist support 4, therefore compared with prior art, when the user leans on the seat, the waist support 4 can be stressed in the present scheme, so that the waist support 4 can produce left and right torsion with the connecting place of the connecting arm 3 as the rotation center, and the waist support 4 can produce up and down torsion through the connecting seat 2 with the connecting place of the base 1 as the rotation center, so that the waist support 4 can produce multiple angle adjustment, so as to facilitate the physiological curve of the waist and improve the wrapping of the waist.

[0024] In this embodiment, the connecting structure between the waist support 4 and the connecting arm 3 is that a mounting groove 31 is arranged on the connecting arm 3, an upwardly extending rotating guide pipe 5 is arranged in the mounting groove 31, a connecting sleeve pipe 6 is sleeved on the outer periphery of the rotating guide pipe 5, the connecting sleeve pipe 6 can rotate in the mounting groove 31 with the rotating guide pipe 5 as the rotating center, and part of the connecting sleeve pipe 6 extends out of the mounting groove 31. After the connecting sleeve pipe 6 is sleeved on the rotating guide pipe 5, a screw nut 100 is screwed on the top of the rotating guide pipe 5 to limit the axial position of the connecting sleeve pipe 6, so as to avoid the connecting sleeve pipe 6 from falling off the rotating guide pipe 5. In this way, after a mounting hole is arranged on the waist support 4 and matches the connecting sleeve pipe 6, the waist support 4 can be sleeved on the outer periphery of the connecting sleeve pipe 6 through the mounting hole. The diameter of the mounting hole is slightly smaller than the diameter of the connecting sleeve pipe 6. In this way, the waist support 4 can be fixed to the connecting sleeve pipe 6 through the interference fit between the mounting hole and the connecting sleeve pipe 6.

[0025] In order to facilitate the overall production and manufacturing, the connecting seat 2, the connecting arm 3, the rotating guide pipe 5 and the limiting block 7 described below are integrally injection molded.

[0026] In addition, in order to avoid the waist support 4 from being twisted too much to the left and right and separated from the waist of the user, a center-symmetrical limiting block 7 is arranged in the mounting groove 31. The bottom end of the connecting sleeve pipe 6 is provided with a limiting groove 61 opposite to the limiting block 7, and the size of the limiting groove 61 is larger than that of the limiting block 7. When the connecting sleeve pipe 6 rotates in the mounting groove 31 with the rotating guide pipe 5 as the rotating center, the connecting sleeve pipe 6 can pass through the limiting groove 61 and abut against the two sides of the limiting block 7, respectively. In this way, the rotating stroke of the connecting sleeve pipe 6 can be limited to a certain extent, so as to limit the angle of the waist support 4 twisted to the left and right.

[0027] In this embodiment, in order to ensure that the waist support 4 can provide sufficient support force to the waist when the waist support 4 is twisted to the left and right and up and down, respectively, a torsional spring 8 is arranged between the connecting sleeve pipe 6 and the mounting groove 31 of the connecting arm 3. In this way, when the connecting sleeve pipe 6 rotates in the mounting groove 31 with the rotating guide pipe 5 as the rotating center, the torsional spring 8 can hinder the rotation of the connecting sleeve pipe 6. Therefore, the torsional spring 8 can provide resistance when the waist support 4 is twisted to the left and right with the connecting part of the connecting arm 3 as the rotating center, so that the force generated by the torsional spring 8 can act on the waist through the waist support 4 when the waist support 4 is twisted to the left and right, thereby providing sufficient support force for the support of the waist support 4 to the waist. In the mounting groove 31 and the inner wall of the connecting sleeve pipe 6, a first connecting groove 32 and a second connecting groove 62 are arranged, respectively, and the ends of the torsional spring 8 are connected to the first connecting groove 32 and the second connecting groove 62. In this way, when the torsional spring 8 is connected between the mounting groove 31 and the connecting sleeve pipe 6, the upper and lower ends of the torsional spring 8 can be inserted into the second connecting groove 62 and the first connecting groove 32, respectively. The installation and fixation of the torsional spring 8 can be completed through the friction generated therebetween, thereby improving the convenience of the installation and fixation of the torsional spring 8.

[0028] Further, by arranging the spring 9 between the connecting seat 2 and the base 1, when the waist support 4 is twisted up and down by the connecting seat 2 with the connecting part of the base 1 as the center, the spring 9 is compressed, and the waist support 4 is provided with resistance by the spring 9, so that the force generated by the spring 9 can act on the waist through the waist support 4 when the waist support 4 is twisted up and down, and sufficient support force is provided for the support of the waist support 4 to the waist. Specifically, one end of the spring 9 is fixed to the bottom of the clearance slot 21 described below, and the other end is fixed to the base 1.

[0029] Secondly, the connecting seat 2 is provided with a clearance slot 21 on the side facing the base 1, which is used to prevent the base 1 from interfering with the rotation of the connecting seat 2 when the connecting seat 2 is rotated towards the base 1, that is, when the connecting seat 2 is rotated towards the base 1, the clearance slot 21 can extend the rotation range towards the base 1, so as to improve the range of the angle of the waist support 4 twisted up and down, so as to more conveniently adapt to the physiological curve of the waist of users of different body types.

[0030] In summary, by arranging the torsion spring 8 and the spring 9, the waist support 4 can be provided with corresponding forces when it is twisted left and right and up and down, so that the waist support 4 can provide sufficient support force to the waist at multiple angles, and the waist support 4 can be twisted left and right with the connecting part of the connecting arm 3 as the center, and twisted up and down with the connecting part of the connecting seat 2 and the base 1 as the center, so as to more conveniently adapt to the physiological curve of the waist and improve the wrapping property of the waist.

[0031] The specific embodiment is only an explanation of the present application, and is not a limitation of the present application. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A multi-angle adaptive double lumbar support mechanism, characterized in that, The device includes a base for fixing a seat, on which a connecting seat is connected. One end of the connecting seat is rotatably connected to the base, and the other end extends upward as a connecting end. The connecting end is provided with connecting arms extending to both sides. The connecting arms are rotatably connected to a lumbar support. When a user leans against the lumbar support, the lumbar support rotates left and right around the connection point with the connecting arm, while the connecting seat rotates up and down around the connection point with the base, in order to adapt to the physiological curve of the waist.

2. The multi-angle adaptive double lumbar support mechanism according to claim 1, characterized in that, The connecting arm is provided with a mounting groove, and the mounting groove is provided with an upwardly extending rotating guide tube. A connecting sleeve is fitted around the outer periphery of the rotating guide tube. The connecting sleeve can rotate within the mounting groove with the rotating guide tube as the rotation center. The waist support is fixed to the connecting sleeve.

3. The multi-angle adaptive double lumbar support mechanism according to claim 2, characterized in that, The mounting groove is provided with a centrally symmetrical limiting block, and the bottom end of the connecting sleeve is provided with a limiting groove opposite to the limiting block.

4. The multi-angle adaptive double lumbar support mechanism according to claim 2, characterized in that, A torsion spring is provided between the mounting groove and the connecting sleeve. The torsion spring provides resistance when the waist support rotates left and right with the connection point with the connecting arm as the center of rotation.

5. The multi-angle adaptive double lumbar support mechanism according to claim 4, characterized in that, The mounting groove and the inner wall of the connecting sleeve are respectively provided with a first connecting groove and a second connecting groove that connect to the end of the torsion spring.

6. The multi-angle adaptive double lumbar support mechanism according to claim 1, characterized in that, The connecting seat has a relief groove on the side facing the base. The relief groove is used to prevent the base from interfering with the rotation of the connecting seat when the connecting seat rotates towards the base.

7. The multi-angle adaptive double lumbar support mechanism according to claim 6, characterized in that, A spring is provided between the connecting seat and the base, with one end of the spring fixed to the bottom of the relief groove and the other end fixed to the base.

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