CN223247861U - Office chair backrest height lifting locking structure - Google Patents

Abstract

The utility model belongs to the technical field of office chairs, and particularly relates to a height lifting locking structure of an office chair backrest. The back of the backrest component is provided with a pair of sliding rails, connecting sliding blocks are movably clamped in the sliding rails, lifting adjusting locking components are further arranged in the sliding rails, each lifting adjusting locking component comprises a jacking button, a driving connecting rod, a limiting driving frame, inclined guide grooves and inclined tooth lock tongues, the upper end of the jacking button is connected with a pair of driving connecting rods, the top ends of the driving connecting rods are inserted into the inclined guide grooves on two sides of the limiting driving frame, the front ends of the limiting driving frames are provided with a pair of inclined tooth lock tongues, the sliding rails are matched and inserted with the backrest supporting frames, and the inclined tooth lock tongues are matched with inclined racks in the backrest supporting frames to perform lifting locking. The backrest lifting structure of the traditional office chair is changed, the backrest height can be freely adjusted according to the use requirement, and the problem that the traditional fixed backrest structure or the sectional backrest structure is not suitable for people with different heights is avoided.

Description

Office chair backrest height lifting locking structure

Technical Field

The utility model belongs to the technical field of office chairs, and particularly relates to a height lifting locking structure of an office chair backrest.

Background

Modern people stay in offices for a long time than at home, a comfortable office chair plays a very important role, but a sitting posture which is unchanged for a long time can cause lower back pain of an occupant, while the effect of a waistband protector which is alleged to prevent the lower back pain is not confirmed at present on the market, and an excessive reliance on the waistband can bring about an adverse effect, so that a proper chair must be considered for computer work users to lower back pain caused by long-time static sitting postures.

In general, the trunk stands upright or slightly forward in a sitting posture (the included angle between the thigh and the upper body is smaller than 90 degrees), and the lumbar intervertebral disc is stressed more than in a standing posture, so that the long-time static sitting posture (lack of posture change) is easy to cause fatigue, so that people often see that after sitting for a long time, the body of people moves to relieve discomfort. Meanwhile, the weight of the body of the backrest support part is reduced, lumbar vertebra stress is reduced, muscles can be relaxed, and therefore, the waist is supported by the backrest as much as possible during working, and the lower back fatigue is very important to be reduced.

Therefore, when the backrest is too high or too low, the lumbar vertebra cannot be properly supported, and the traditional office chair backrest is fixed or the adjustment of the backrest holy sword cannot be controlled, so that the use requirements of different people cannot be met, and the office chair backrest height lifting locking structure is provided.

Disclosure of utility model

The utility model aims to provide an office chair backrest height lifting locking structure which is simple in structure, reasonable in design and convenient to use, changes a traditional office chair backrest lifting structure, can freely adjust backrest height according to use requirements, and avoids the problem that the traditional fixed backrest structure or the sectional backrest structure is not suitable for crowds with different heights.

The lifting adjusting locking assembly comprises a lifting button, a driving connecting rod, a limiting driving frame, an inclined guide groove and an inclined tooth lock tongue, wherein the upper end of the lifting button is connected with a pair of driving connecting rods, the top ends of the driving connecting rods are inserted into the inclined guide grooves on two sides of the limiting driving frame, the front end of the limiting driving frame is provided with a pair of inclined tooth lock tongues, the sliding rail is matched with the chair back supporting frame in an inserting mode, and the inclined tooth lock tongue is matched with the inclined rack in the chair back supporting frame in a lifting locking mode.

Preferably, the connecting sliding block is fixed with a reserved seat matched bolt in the chair back support frame, so that the chair back support frame and the backrest component are connected and fixed.

Preferably, the top end of the driving connecting rod is of an inclined support arm structure, and the inclined support arm structure and the inclined guide groove are matched to push the limiting driving frame to translate to one side, so that the inclined tooth lock tongue and the inclined rack are limited and unlocked.

Preferably, the helical tooth lock tongue and the helical rack keep the helical tooth structure in the same direction, and the helical tooth lock tongue and the helical rack are unlocked and clamped in a horizontal dislocation mode to realize up-and-down displacement.

Preferably, the jacking button is movably clamped in the lower edge frame body of the backrest assembly, and is matched with a reset spring to realize a jacking pressing structure.

After the structure is adopted, the utility model has the beneficial effects that:

1. The height of the backrest can be adjusted according to the situation by people with different heights, the upper and lower parts can be adjusted at will after pressing, the backrest can be locked when the person releases hands, and the most comfortable supporting position can be found according to the requirements;

2. The adaptability is improved, namely, the backrest can be adjusted to meet different requirements due to different body types and sitting habits of each person, and a more relaxed posture can be found due to different back supports in a sitting state and a half-lying state;

3. the comfortable backrest is arranged on an office chair for a long time, the comfortable backrest height can reduce back fatigue, muscles and spines of the back can be better supported by adjusting the backrest height, and the pain caused by keeping the same posture for a long time is relieved;

4. The adjustable backrest can help people to keep a good sitting posture, reduce the spine problem caused by improper sitting posture, and can relieve pain and promote rehabilitation by adjusting the backrest height to a proper level for people with lumbar diseases or back pain.

Drawings

For a clearer description of embodiments of the present utility model or technical solutions in the prior art, the present utility model is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the backrest structure of the present utility model;

Fig. 3 is a schematic view of the structure of the sliding rail 9 according to the present utility model;

FIG. 4 is a schematic view of the lift adjustment locking assembly 10 of the present utility model;

FIG. 5 is a schematic view of the lift adjustment locking assembly 10 of the present utility model;

fig. 6 is a schematic structural view of a chair back support frame 6 according to the present utility model;

FIG. 7 is a schematic view of the lift adjustment of the present utility model;

The reference numerals indicate that a supporting bracket 1, an adjusting base 2, a cushion 3, an adjustable armrest 4, an adjusting backrest 5, a chair back supporting frame 6, a backrest component 7, a connecting sliding block 8, a sliding rail 9, a lifting adjusting locking component 10, a diagonal rack 11, a jacking button 101, a driving connecting rod 102, a limiting driving frame 103, a diagonal guide groove 104 and a diagonal tooth lock tongue 105.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

It should be noted here that, in order to avoid obscuring the present utility model due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details not greatly related to the present utility model are omitted.

Referring to fig. 1-6, the specific embodiment adopts the following technical scheme that the lifting and adjusting device comprises a supporting bracket 1, an adjusting base 2, a cushion 3, an adjustable armrest 4 and an adjusting backrest 5, wherein the adjusting backrest 5 consists of a backrest support frame 6 and a backrest component 7, a pair of sliding rails 9 are arranged on the back of the backrest component 7, a connecting sliding block 8 is movably clamped in the sliding rails 9, a lifting and adjusting locking component 10 is further arranged in the sliding rails 9, the lifting and adjusting locking component 10 comprises a lifting button 101, a driving connecting rod 102, a limiting driving frame 103, an inclined guide groove 104 and an inclined tooth lock tongue 105, the upper end of the lifting button 101 is connected with a pair of driving connecting rods 102, the top ends of the driving connecting rods 102 are inserted into the inclined guide grooves 104 on two sides of the limiting driving frame 103, the front end of the limiting driving frame 103 is provided with a pair of inclined tooth lock tongue 105, the sliding rails 9 are matched with the backrest support frame 6, the inclined tooth lock tongue 105 is matched with an inclined rack 11 in the backrest support frame 6 for lifting and locking, the lifting and adjusting of the lifting and adjusting locking component 10 meets the requirements that the height of different persons can adjust the backrest according to the conditions, and then the position can be adjusted at will, and the user can find the position of the user can feel comfortable when the user can press the position;

The connecting slide block 8 is fixed with a reserved seat matched bolt in the chair back support frame 6, so that the chair back support frame 6 and the backrest component 7 are connected and fixed, the top end of the driving connecting rod 102 is of an inclined support arm structure, the driving connecting rod is matched with the inclined guide groove 104 to push the limiting driving frame 103 to translate to one side, so that limiting unlocking of the inclined tooth lock tongue 105 and the inclined rack 11 is realized, the inclined tooth lock tongue 105 and the inclined rack 11 keep an equidirectional inclined tooth structure, and up-and-down displacement between the inclined tooth lock tongue 105 and the inclined rack 11 is realized through unlocking and clamping in a horizontal dislocation mode. The inclined tooth behavior structure increases the accuracy and the selectivity of the height adjustment of the backrest, the backrest can be adjusted according to different body types and sitting postures of each person, the comfortable backrest height can reduce the back fatigue, the muscles and the spine of the back can be better supported by adjusting the backrest height, the pain caused by keeping the same posture for a long time is relieved, the body can be relaxed by properly adjusting the backrest height in a working gap, the tension emotion is relieved, and the working efficiency is improved.

In addition, the jacking button 101 is movably clamped in the lower edge frame body of the backrest assembly 7, and is matched with a reset spring to realize a jacking pressing structure. Greatly improves the convenience of adjustment along with adjustment, and is simple and convenient.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. An office chair backrest height lifting and locking structure, characterized in that: it comprises a supporting bracket, an adjustment base, a seat cushion, an adjustable armrest, and an adjustable backrest; the adjustable backrest consists of a chair back support frame and a backrest assembly; wherein, a pair of sliding rails are provided on the back of the backrest assembly, a connecting slider is movably engaged inside the sliding rails, and a lifting and adjusting locking assembly is also provided inside the sliding rails; the lifting and adjusting locking assembly comprises a jacking button, a driving connecting rod, a limit driving frame, an oblique guide groove, and an oblique toothed locking tongue; the upper end of the jacking button is connected to a pair of driving connecting rods, the top end of the driving connecting rod is inserted into the oblique guide grooves on both sides of the limit driving frame, and a pair of oblique toothed locking tongues are provided at the front end of the limit driving frame; the sliding rail is plugged in with the chair back support frame, and the oblique toothed locking tongue cooperates with the oblique rack inside the chair back support frame to perform lifting and locking. 2. The office chair backrest height lifting and locking structure according to claim 1 is characterized in that the connecting slider is fixed to the reserved seat inside the chair back support frame with bolts, thereby realizing the connection and fixation between the chair back support frame and the backrest assembly. 3. The office chair backrest height lifting and locking structure according to claim 1 is characterized in that the top end of the driving connecting rod is an oblique support arm structure, which cooperates with the oblique guide groove to push the limit driving frame to move horizontally to one side, thereby realizing the limit unlocking of the oblique tooth lock tongue and the oblique rack. 4. The office chair backrest height lifting and locking structure according to claim 3 is characterized in that the helical tooth lock tongue and the helical rack maintain a helical tooth structure in the same direction, and the helical tooth lock tongue and the helical rack are unlocked and engaged by horizontal dislocation to achieve vertical displacement between the helical tooth lock tongue and the helical rack. 5. The office chair backrest height lifting and locking structure according to claim 1 is characterized in that the lifting button is movably connected to the lower edge frame of the backrest assembly and cooperates with the return spring to realize the lifting and pressing structure.