Detachable rotating structure

This application claims priority to Chinese Patent Application 202421434921.4, filed on Jun. 21, 2024, which is incorporated herein by reference.

This application relates to the technical field of rotating devices, and in particular to a detachable rotating structure.

The seat back usually refers to the rear support part of a chair, which is usually used to support the back of a person sitting on the chair, so that people can sit more comfortably. The seat back can adopt various designs and shapes to adapt to different types of seats and usage scenarios. The design and comfort of the seat back is very important for people's sitting posture and experience, so they are carefully considered and optimized in furniture design and automotive engineering.

Existing seats usually design the shape of the seat back to match the human spine. When a person's waist leans on the seat back, the back supports the waist and back. However, due to different body shapes of users, not all users can have the ideal support effect when leaning, which affects comfort.

In order to adjust the lumbar support of the seat more conveniently and improve the comfort, this application provides a detachable rotating structure.

This application provides a detachable rotating structure, which adopts the following technical scheme: a detachable rotating structure, comprising a first part and a second part, wherein the end of the first part is rotatably connected to the second part, the rotating end of the first part is uniformly provided with a plurality of grooves along the rotating direction, the rotating end of the second part has a stopper for embedding into the groove, the stopper is elastically clamped into the groove along the axial direction of the rotating axis, the stopper has an abutment surface in the reverse direction, the abutment surface is used to abut against the inner wall of the limit groove to limit the rotation of the first part and the second part; the rotation part of the first part and the second part is provided with a linkage block for pushing the stopper along the extension direction of the second part.

By adopting the above technical scheme, when rotating in the positive direction, the stopper can be continuously clamped into the groove by elastic clamping to achieve different angle adjustments, and when subjected to force, that is, when subjected to force in the reverse direction, the abutment surface can form a circumferential limit to achieve the fixation of the lumbar support, and when the linkage block pushes the stopper away from the groove, it can be rotated in the reverse direction to achieve reset, achieve the adjustment of the lumbar support, and improve comfort.

Preferably, the end of the second part is provided with a shell, the end of the first part has a moving ring rotatably connected to the shell, the groove is provided on the side ring surface of the moving ring, the outer side of the moving ring has a circumferential avoidance groove, a linkage ring for abutting against the groove wall on one side of the avoidance groove is rotatably connected in the shell, the linkage block is located on the outer wall of the linkage ring, and a convex block located in the avoidance groove is also provided on the side ring surface of the linkage ring, the convex block is used to abut against the side wall of the avoidance groove, so that the linkage ring rotates synchronously.

Preferably, the limiter includes a limiter block elastically sliding on the end of the second part along the axial direction of the rotating shaft, and a one-way convex tooth provided on the side of the limiter block close to the moving ring, and the linkage block is used to abut against the limiter block.

Preferably, the end of the second part has a first groove for the limiter block to be embedded in the longitudinal direction thereof, a first elastic member is provided between the bottom of the first groove and the limiter block, and a second elastic member connected to the limiter block and making it have a tendency to be embedded in the groove is provided in the shell.

Preferably, the limiter includes a limiter block provided at the end of the second part, and a one-way protrusion elastically provided on the limiter block along the axial direction of the rotation axis, and the one-way protrusion has a guiding inclined surface for contacting the edge of the groove on one side along the rotation direction, and the other side thereof is the abutment surface.

Preferably, the one-way protrusions are evenly distributed along the direction of the rotation path.

Preferably, the radially outward end of the groove is open.

In summary, the present application includes at least one of the following beneficial technical effects: when rotating in the positive direction, the limiter can be continuously engaged in the groove through elastic engagement to achieve different angle adjustments, and when subjected to force, that is, when subjected to force in the reverse direction, the abutment surface can form a circumferential limit to achieve the fixation of the lumbar support, and when the linkage block pushes the limiter away from the groove, it can be rotated in the reverse direction to achieve reset, achieve the adjustment of the lumbar support, and improve comfort.

Description of the reference numerals:, first part;, second part;, housing;, rotating shaft;, moving ring;, groove;, abutment surface;, linkage ring;, convex block;, linkage block;, avoidance groove;, limit block;, one-way convex tooth;, linkage groove;, first groove;, second groove;, first spring;, second spring;, one-way convex block;, abutment block;, guiding inclined surface.

This application is further described in detail below in conjunction with the accompanying drawings.

Embodiment 1: A detachable rotating structure, referring toand, includes a first partand a second part, which are respectively fixed to the backrest or the waist support by bolts. Generally speaking, the first partis installed on the backrest, and the second partis installed on the waist support.

Referring toand, the end of the first partis rotatably connected to the second part. In this embodiment, the end of the second partis sleeved with a shell, and the shellis a hollow structure. The first parthas a rotating shaftthat penetrates the shell. The front part of the rotating shaftis cylindrical, and the rear half is prismatic. A motion ringis sleeved on the rotating shaft, and the inner side of the motion ringis a prismatic hole that is clamped to the rotating shaft, so that the motion ringcan be synchronously rotated and connected to the rotating shaft.

Referring to, a plurality of groovesare evenly distributed along the circumferential direction on the side ring surface of the motion ring, and correspondingly, a stopper is provided at the rotating end of the second partfor embedding into the groove. The stopper is elastically clamped into the groovealong the axial direction of the rotating shaft, and the stopper has an abutment surfacealong the reverse direction, and the abutment surfaceis used to abut against the inner wall of the limit grooveto limit the rotation of the first partand the second part. In this embodiment, the positive direction is the direction of rotation adjustment of the normal lumbar support, and the reverse direction is the reverse rotation. At this time, the existence of the abutment surfaceenables the first partand the second partto be relatively fixed in the reverse direction.

2, 4 and 6, a linkage ringis rotatably connected in the shell, a protrusionis provided on the side ring surface of the linkage ring, and a linkage blockis provided on the outer wall of the linkage ring. In this embodiment, the linkage ringis rotatably connected to the shell, and a torsion spring (not shown in the figure) is provided at the rotation position of the linkage ring, so that the linkage ringcan be reset to the original position under the action of the torsion spring after each rotation. The outer side of the motion ringhas a circumferential avoidance groove, which is arc-shaped. The above-mentioned protrusionis embedded in the avoidance groove. During the rotation of the motion ring, the protrusionwill slide in the avoidance groove. When the end of the avoidance grooveabuts against the protrusion, the linkage ringcan be driven to rotate. During the rotation, the linkage blockwill abut against the limiter, so that the limiter is separated from the motion ring, and the circumferential limit of the first partand the second partis released.

Referring to, the limiter in this embodiment includes a limiterelastically sliding at the end of the second partalong the axial direction of the rotating shaft, and a one-way convex tootharranged on the side of the limiterclose to the motion ring, and the linkage blockis used to abut against the limiter. On one side of the limit block, there is a linkage groovefor the linkage blockto enter. During the rotation process, the linkage blockwill gradually be embedded in the linkage groove. There is a convex part in the linkage groove, which can make the limit blockas a whole disengage from the grooveafter the collision, and at this time, the first partand the second partcan rotate in the opposite direction.

The end of the second parthas a first groovefor the limit blockto be embedded along its length direction. A first elastic member is arranged between the bottom of the first grooveand the limit block. In this embodiment, the first elastic member is a first spring. The bottom of the first groovehas a second groove, and the first springis arranged in the second groove. The housinghas a second elastic member connected to the limit blockand making it have a tendency to be embedded in the groove. In this embodiment, the second elastic member is a second spring.

The working principle of embodiment 1 is as follows: first, the first partand the second partrotate relative to each other, and the rotating shaftwill drive the moving ringto rotate synchronously. At this time, the limit blockis limited by the first groove, so the inclined surface of the one-way convex toothwill abut against the edge of the groove, so that the limit blockretreats along the length direction of the rotating shaft. At this time, the second springis compressed, so that the one-way convex toothcan be embedded in the next groove, and the flat part of the one-way convex toothis the abutment surface, which fits with the inner wall of the grooveso that it will not be separated in the reverse direction.

With continuous rotation and adjustment, the avoidance groovewill move until the protrusionabuts, at which time the linkage ringwill be driven to rotate, and the linkage blockwill enter the linkage groove. At the same time, the rotation direction of the second partenters the last gear. At this time, the linkage blockpushes the limit blockto disengage, and the abutment surfacewill also disengage. At this time, the first springwill be compressed. During this process, the time is enough to make the second partrotate in the opposite direction. Then the limit blockmoves along the first grooveunder the action of the first springand resets. At this time, the abutment surfacecontinues to be in the opposite direction. The overall process is relatively simple, and the position of the lumbar support can be adjusted very conveniently to improve comfort.

Embodiment 2: The difference from Embodiment 1 is that, referring to, the stopper includes a stopperdisposed at the end of the second portion, and a one-way protrusionelastically disposed on the stopperalong the axial direction of the rotating shaft. The one-way protrusionhas a guiding inclined surfacefor contacting the edge of the grooveon one side along the rotation direction, and the other side is a contact surface. The one-way protrusionis evenly distributed along the direction of the rotation path. The end of the groovefacing outward in the radial direction is open.

Each one-way protrusionis arranged on the limit block, and a separate stopperis provided in the inner cavity of the limit block. One stopperis connected to multiple one-way protrusions. In this embodiment, the second springis present in the inner cavity of the limit blockand is connected to the stopper, so that the entire limit blockwill only move back and forth along the length direction of the second part, thereby reducing the movement of the limit blockin other directions to avoid jamming in the case of long-term use.

And when the linkage blockpushes the limit block, it can be withdrawn from the opening side of the groove, which is more convenient. At the same time, the separate one-way protrusioncan make the cooperation between the abutment surfaceand the groovesmoother when disengaging and combining.

The embodiments of this specific implementation are all preferred embodiments of the present application, and the protection scope of the application is not limited thereto. Therefore, all equivalent changes made based on the structure, shape, and principle of the application should be covered within the protection scope of the application.