Detachable rotating structure

Description

REFERENCE TO PRIOR APPLICATION

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

TECHNICAL FIELD

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

BACKGROUND TECHNOLOGY

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.

CONTENTS OF THE INVENTION

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 DRAWINGS

FIG. 1 is a schematic diagram of the structure of embodiment 1 of the present application;

FIG. 2 is a schematic diagram of the internal structure of embodiment 1 of the present application;

FIG. 3 is a schematic diagram of the structure of the first part and the rotating shaft;

FIG. 4 is a schematic diagram of the partial explosion structure of embodiment 1 of the present application;

FIG. 5 is a schematic diagram of the connection relationship between the limit block and the second part of embodiment 1 of the present application;

FIG. 6 is a schematic diagram of the connection relationship between the linkage ring, the motion ring and the limit block of embodiment 1 of the present application;

FIG. 7 is a schematic diagram of the internal structure of the limit block in embodiment 2 of the present application;

FIG. 8 is a schematic diagram of the partial explosion of the limit block in embodiment 2 of the present application.

Description of the reference numerals: 100, first part; 111, second part; 112, housing; 113, rotating shaft; 114, moving ring; 115, groove; 116, abutment surface; 120, linkage ring; 121, convex block; 122, linkage block; 123, avoidance groove; 130, limit block; 131, one-way convex tooth; 132, linkage groove; 133, first groove; 134, second groove; 135, first spring; 136, second spring; 142, one-way convex block; 143, abutment block; 144, guiding inclined surface.

SPECIFIC IMPLEMENTATION METHODS

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

Embodiment 1: A detachable rotating structure, referring to FIG. 1 and FIG. 2, includes a first part 100 and a second part 111, which are respectively fixed to the backrest or the waist support by bolts. Generally speaking, the first part 100 is installed on the backrest, and the second part 111 is installed on the waist support.

Referring to FIG. 2 and FIG. 3, the end of the first part 100 is rotatably connected to the second part 111. In this embodiment, the end of the second part 111 is sleeved with a shell 112, and the shell 112 is a hollow structure. The first part 100 has a rotating shaft 113 that penetrates the shell 112. The front part of the rotating shaft 113 is cylindrical, and the rear half is prismatic. A motion ring 114 is sleeved on the rotating shaft 113, and the inner side of the motion ring 114 is a prismatic hole that is clamped to the rotating shaft 113, so that the motion ring 114 can be synchronously rotated and connected to the rotating shaft 113.

Referring to FIGS. 4 and 5, a plurality of grooves 115 are evenly distributed along the circumferential direction on the side ring surface of the motion ring 114, and correspondingly, a stopper is provided at the rotating end of the second part 111 for embedding into the groove 115. The stopper is elastically clamped into the groove 115 along the axial direction of the rotating shaft 113, and the stopper has an abutment surface 116 along the reverse direction, and the abutment surface 116 is used to abut against the inner wall of the limit groove 115 to limit the rotation of the first part 100 and the second part 111. 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 surface 116 enables the first part 100 and the second part 111 to be relatively fixed in the reverse direction.

2, 4 and 6, a linkage ring 120 is rotatably connected in the shell 112, a protrusion 121 is provided on the side ring surface of the linkage ring 120, and a linkage block 122 is provided on the outer wall of the linkage ring 120. In this embodiment, the linkage ring 120 is rotatably connected to the shell 112, and a torsion spring (not shown in the figure) is provided at the rotation position of the linkage ring 120, so that the linkage ring 120 can be reset to the original position under the action of the torsion spring after each rotation. The outer side of the motion ring 114 has a circumferential avoidance groove 123, which is arc-shaped. The above-mentioned protrusion 121 is embedded in the avoidance groove 123. During the rotation of the motion ring 114, the protrusion 121 will slide in the avoidance groove 123. When the end of the avoidance groove 123 abuts against the protrusion 121, the linkage ring 120 can be driven to rotate. During the rotation, the linkage block 122 will abut against the limiter, so that the limiter is separated from the motion ring 114, and the circumferential limit of the first part 100 and the second part 111 is released.

Referring to FIGS. 5 and 6, the limiter in this embodiment includes a limiter 130 elastically sliding at the end of the second part 111 along the axial direction of the rotating shaft 113, and a one-way convex tooth 131 arranged on the side of the limiter 130 close to the motion ring 114, and the linkage block 122 is used to abut against the limiter 130. On one side of the limit block 130, there is a linkage groove 132 for the linkage block 122 to enter. During the rotation process, the linkage block 122 will gradually be embedded in the linkage groove 132. There is a convex part in the linkage groove 132, which can make the limit block 130 as a whole disengage from the groove 115 after the collision, and at this time, the first part 100 and the second part 111 can rotate in the opposite direction.

The end of the second part 111 has a first groove 133 for the limit block 130 to be embedded along its length direction. A first elastic member is arranged between the bottom of the first groove 133 and the limit block 130. In this embodiment, the first elastic member is a first spring 135. The bottom of the first groove 133 has a second groove 134, and the first spring 135 is arranged in the second groove 134. The housing 112 has a second elastic member connected to the limit block 130 and making it have a tendency to be embedded in the groove 115. In this embodiment, the second elastic member is a second spring 136.

The working principle of embodiment 1 is as follows: first, the first part 100 and the second part 111 rotate relative to each other, and the rotating shaft 113 will drive the moving ring 114 to rotate synchronously. At this time, the limit block 130 is limited by the first groove 133, so the inclined surface of the one-way convex tooth 131 will abut against the edge of the groove 115, so that the limit block 130 retreats along the length direction of the rotating shaft 113. At this time, the second spring 136 is compressed, so that the one-way convex tooth 131 can be embedded in the next groove 115, and the flat part of the one-way convex tooth 131 is the abutment surface 116, which fits with the inner wall of the groove 115 so that it will not be separated in the reverse direction.

With continuous rotation and adjustment, the avoidance groove 123 will move until the protrusion 121 abuts, at which time the linkage ring 120 will be driven to rotate, and the linkage block 122 will enter the linkage groove 132. At the same time, the rotation direction of the second part 111 enters the last gear. At this time, the linkage block 122 pushes the limit block 130 to disengage, and the abutment surface 116 will also disengage. At this time, the first spring 135 will be compressed. During this process, the time is enough to make the second part 111 rotate in the opposite direction. Then the limit block 130 moves along the first groove 133 under the action of the first spring 135 and resets. At this time, the abutment surface 116 continues 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 FIGS. 7 and 8, the stopper includes a stopper 130 disposed at the end of the second portion 111, and a one-way protrusion 142 elastically disposed on the stopper 130 along the axial direction of the rotating shaft 113. The one-way protrusion 142 has a guiding inclined surface 144 for contacting the edge of the groove 115 on one side along the rotation direction, and the other side is a contact surface 116. The one-way protrusion 142 is evenly distributed along the direction of the rotation path. The end of the groove 115 facing outward in the radial direction is open.

Each one-way protrusion 142 is arranged on the limit block 130, and a separate stopper 143 is provided in the inner cavity of the limit block 130. One stopper 143 is connected to multiple one-way protrusions 142. In this embodiment, the second spring 136 is present in the inner cavity of the limit block 130 and is connected to the stopper 143, so that the entire limit block 130 will only move back and forth along the length direction of the second part 111, thereby reducing the movement of the limit block 130 in other directions to avoid jamming in the case of long-term use.

And when the linkage block 122 pushes the limit block 130, it can be withdrawn from the opening side of the groove 115, which is more convenient. At the same time, the separate one-way protrusion 142 can make the cooperation between the abutment surface 116 and the groove 115 smoother 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.