Waist rest depth adjusting device

Abstract

The invention discloses a waist rest depth adjusting device which comprises a waist rest body rotationally connected to a back support, a supporting component that is longitudinally arranged between the waist rest body and the back support, and comprises a matching part and an elastic part, and an adjusting assembly; the supporting component correspondingly slides up and down along the back bracket in response to the rotating action of the waist rest body; at least two positioning holes are formed in the matching part; the adjusting assembly is arranged on the side of the supporting component; the adjusting assembly comprises a locking piece connected to the back support and a control handle controlling the locking piece to move transversely. A locking pin matched with the positioning hole in an inserting manner is formed on the locking piece; when the locking pins are separated from the positioning holes, the waist rest body rotates back and forth and drives the supporting component to move up and down to adjust the initial position of the waist rest body; the locking pins are inserted into the positioning holes in the corresponding positions to fix the initial position of the waist rest body; when the waist rest body is located at different initial positions and is subjected to backward acting force, the elastic part is promoted to deform so as to elastically support the waist rest body.

Description

technical field

[0001] The invention relates to the field of seats, in particular to a lumbar depth adjustment device. Background technique

[0002] Sub-health has always been a life issue that people pay attention to. Among them, the lumbar spine problems caused by sitting for a long time are particularly frequent, and chairs are used as daily furniture for people to work and study. Under long-term sitting and working, the human spine has a natural Bending, especially the bending at the lumbar spine is more important. Sitting for a long time will easily make the lumbar spine bend outwards, which will easily lead to lumbar diseases such as lumbar disc herniation over time. As we all know, the human spine is S-shaped. For this reason, some office chairs add a lumbar support to the backrest to support the lumbar natural curvature, preventing it from bending outwards due to fatigue, and ensuring the comfort of the office. People's lumbar spine health.

[0003] However, in pra...

Examples

specific Embodiment approach

[0047] like Figure 1-11 As shown, the present invention provides a lumbar depth adjustment device, which includes a lumbar body 1 rotatably connected to a back bracket A, and the lumbar body 1 can rotate around the back bracket A back and forth. A longitudinal supporting part 3 is provided between the lumbar support body 1 and the back bracket A. The supporting part 3 includes a fitting part 8 at the bottom and a vertical elastic part 14 with elasticity. The fitting part 8 is slidably matched with the back bracket A, The supporting part 3 can slide upwards or downwards along the back bracket A in response to the back and forth rotation of the lumbar support body 1 . The back support A is also provided with an adjustment assembly 4 located on one side of the support member 3, the adjustment assembly 4 includes a cylindrical guide seat 5 connected to the back support A, a locking member 6 arranged in the cylindrical guide seat 5, and The control handle 7 that can control the m...

technical field

[0001] The invention relates to the field of seats, in particular to a lumbar depth adjustment device. Background technique

[0002] Sub-health has always been a life issue that people pay attention to. Among them, the lumbar spine problems caused by sitting for a long time are particularly frequent, and chairs are used as daily furniture for people to work and study. Under long-term sitting and working, the human spine has a natural Bending, especially the bending at the lumbar spine is more important. Sitting for a long time will easily make the lumbar spine bend outwards, which will easily lead to lumbar diseases such as lumbar disc herniation over time. As we all know, the human spine is S-shaped. For this reason, some office chairs add a lumbar support to the backrest to support the lumbar natural curvature, preventing it from bending outwards due to fatigue, and ensuring the comfort of the office. People's lumbar spine health.

[0003] However, in pra...

Examples

specific Embodiment approach

[0047] like Figure 1-11 As shown, the present invention provides a lumbar depth adjustment device, which includes a lumbar body 1 rotatably connected to a back bracket A, and the lumbar body 1 can rotate around the back bracket A back and forth. A longitudinal supporting part 3 is provided between the lumbar support body 1 and the back bracket A. The supporting part 3 includes a fitting part 8 at the bottom and a vertical elastic part 14 with elasticity. The fitting part 8 is slidably matched with the back bracket A, The supporting part 3 can slide upwards or downwards along the back bracket A in response to the back and forth rotation of the lumbar support body 1 . The back support A is also provided with an adjustment assembly 4 located on one side of the support member 3, the adjustment assembly 4 includes a cylindrical guide seat 5 connected to the back support A, a locking member 6 arranged in the cylindrical guide seat 5, and The control handle 7 that can control the m...

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