CN215936838U

CN215936838U - Chair back lifting adjusting mechanism and chair

Info

Publication number: CN215936838U
Application number: CN202122382352.6U
Authority: CN
Inventors: 廖建甜
Original assignee: Foshan Hengfa Furniture Technology Co ltd
Current assignee: Foshan Hengfa Furniture Technology Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-04
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a chair back lifting adjusting mechanism and a chair, comprising: the chair comprises a back bracket and a chair back which are assembled together, wherein the chair back can slide up and down relative to the back bracket; the back support is characterized in that a sliding chute is arranged on the back support, and a plurality of inwards concave lifting gears are formed on the bottom side of the sliding chute; the chair back is provided with a sliding block which is in sliding embedded with the sliding groove, the sliding block is provided with a clamping block which is installed in a rotating mode, and the clamping block can be clamped on the lifting gear under the action of a return spring. According to the utility model, the lifting gear is arranged to be in the concave structure, the chair back can automatically descend after being adjusted to the highest position, and a slotted hole, a ring-shaped spring, a slope and the like are not required to be arranged, so that the structure is simpler, and the operation is very convenient. Meanwhile, the sliding embedded structure of the sliding groove and the sliding block ensures that the lifting of the chair back is very stable and the reliability is good.

Description

Chair back lifting adjusting mechanism and chair

Technical Field

The utility model relates to the technical field of household products, in particular to a chair back lifting adjusting mechanism and a chair.

Background

The back of the chair is an important part for providing the comfort of the support in a sitting posture of a human body, and in order to provide wider adaptability, the back of the chair is often configured to be adjustable in elevation so as to adapt to the height of the upper body of different people in sitting postures. In the prior art, a lifting adjusting mechanism of a chair back generally adopts a friction fit or bump fit mode, so that the adjustment of the chair back forms gear adjustment. The above two gear adjusting modes are usually started in the adjusting process through structures such as buttons, the structure is not intuitive in operation, short in service life, difficult to maintain the function of long-term repeated adjustment and poor in stability.

A chinese utility model patent that publication is CN209573966U discloses a quick reset structure of lift back of the chair, including the lift back of the chair and mount, the lift back of the chair and mount front end swing joint, its characterized in that: the lifting chair back comprises a chair back support, the back surface of the chair back support is provided with a buckle, a connecting plate fixedly connected with the back surface of the chair back support, a snap spring arranged at the end of the connecting plate, a torsion spring movably connected at the lower part of the connecting plate and a slope arranged below the snap spring, the clamp spring is provided with an extension strip and a ring-shaped spring at the corner of the tail end of the extension strip, the buckle is arranged on the side of the connecting plate and is movably connected with the rear surface of the chair back bracket, one end of the torsion spring is contacted with the chair back bracket, the other end of the torsion spring is elastically compressed by the acting force of the buckle, the buckle is provided with a slotted hole and a slope contact, the opening width of the groove hole is slightly smaller than the diameter of the ring-shaped spring, the groove hole is opposite to the ring-shaped spring, the slope contact is opposite to the slope surface of the slope, the front surface of the fixing frame is provided with a lifting gear strip, the buckling part of the buckle is in contact with the gear of the lifting gear strip, and the highest position of the lifting gear strip is provided with a protruding block.

When the lifting chair works, a user lifts the lifting chair back, the buckle movably connected with the rear surface of the chair back support is driven by the lifting chair back to lift, and the buckle part of the buckle is contacted with the gear of the lifting gear strip through the return effect of the torsion spring in an elastic compression state on the buckle, so that the upward gear adjustment of the lifting chair back is realized; when the lifting chair back rises to the highest gear, the buckle part of the buckle is blocked by the highest gear of the lifting gear strip to move towards the direction of the ring-shaped spring of the clamp spring, the groove hole of the buckle is buckled with the ring-shaped spring, the buckle can not be contacted with the gear of the lifting gear strip temporarily, the lifting chair back vertically falls until the slope contact of the buckle is contacted with the inclined edge of the slope, the ring-shaped spring is separated from the groove hole, and the buckle returns. Although the prior patent can realize the automatic disengagement and reset of the buckle and the lifting gear strip, the prior patent still has a complex structure because slotted holes, ring-shaped springs, slopes and the like are required to be arranged; in addition, the problems of dislocation, part damage and the like are easy to occur in the process of clamping and releasing the ring-shaped spring into and out of the slotted hole.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a chair back lifting adjusting mechanism which is simpler in structure and more convenient to adjust.

The utility model also provides a seat with the chair back lifting adjusting mechanism.

In order to achieve the purpose, the utility model adopts the following technical scheme.

A chair back lift adjustment mechanism comprising: the chair comprises a back bracket and a chair back which are assembled together, wherein the chair back can slide up and down relative to the back bracket; the back support is characterized in that a sliding chute is arranged on the back support, and a plurality of inwards concave lifting gears are formed on the bottom side of the sliding chute; the chair back is provided with a sliding block which is in sliding embedded with the sliding groove, the sliding block is provided with a clamping block which is installed in a rotating mode, and the clamping block can be clamped on the lifting gear under the action of a return spring.

More preferably, a maximum limit protrusion and a minimum limit protrusion protruding outward are formed at a bottom side of the sliding groove, and the maximum limit protrusion and the minimum limit protrusion are respectively located at an upper side and a lower side of the lifting gear.

More preferably, the sliding block is provided with an installation groove, and the clamping block is rotatably installed in the installation groove.

More preferably, a connecting column or a connecting hole is arranged on one side of the fixture block, which is far away from the lifting gear, and the reset spring is sleeved on the connecting column or inserted in the connecting hole.

More preferably, the back support is a hollow support, the sliding grooves are respectively arranged on two sides of the hollow support, and the sliding blocks matched with the corresponding sliding grooves are respectively arranged on two sides of the chair back.

A seat, comprising: the chair comprises a chair seat, armrests and a back support which are arranged on the chair seat, a chair back connected with the back support, and a headrest connected with the chair back; the chair is characterized in that the chair back is connected with the back bracket through the chair back lifting adjusting mechanism.

More preferably, a waist rest is arranged on the chair back, has certain elasticity and protrudes in an arc shape towards one side of the chair seat; the waist rest is of a net frame structure, and the lower side of the net frame structure is suspended at the upper side of the chair seat.

More preferably, the armrest comprises a left armrest and a right armrest which are positioned on two sides of the seat, and a first adjusting switch for adjusting the height of the seat and a second adjusting switch for adjusting the pitch angle of the back support are respectively arranged on the left armrest and the right armrest.

More preferably, the bottom of the chair seat is provided with an expansion bracket, and the front end of the expansion bracket is rotatably connected with a foot rest; an angle regulator for controlling the rotation angle of the foot rest is arranged between the telescopic frame and the foot rest.

More preferably, a vertical height adjustable structure is formed between the headrest and the chair back.

The utility model has the beneficial effects that: the lifting gear is arranged to be in the concave structure, the chair back can automatically descend after being adjusted to the highest position, a slotted hole, a ring-shaped spring, a slope and the like are not needed to be arranged, the structure is simpler, and the operation is very convenient. Meanwhile, the sliding embedded structure of the sliding groove and the sliding block ensures that the lifting of the chair back is very stable and the reliability is good.

Drawings

Fig. 1 is a schematic structural view of a chair back lifting adjusting mechanism provided by the utility model.

Fig. 2 is a schematic view showing the assembly of the slide groove and the slide block.

Fig. 3 is a schematic structural diagram of the slider.

Fig. 4 is a schematic structural diagram of the latch.

Fig. 5 is a schematic view of the seat structure.

Reference numerals indicate the same.

1: back support, 2: chair back, 3: seat, 4: an armrest, 5: headrest, 6: waist back, 7: a foot rest.

1-1: chute, 1-2: lifting gear, 1-3: highest limit bulge, 1-4: the lowest limit bulge.

2-1: slide block, 2-2: a clamping block, 2-3: mounting groove, 2-4: connecting columns.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the utility model, "at least" means one or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the utility model, but are not to be construed as limiting the utility model.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

As shown in fig. 1 to 4, a chair back lifting adjusting mechanism includes: the chair comprises a back bracket 1 and a chair back 2 which are assembled together, wherein the chair back 2 can slide up and down relative to the back bracket 1; the back support is characterized in that a sliding chute 1-1 is arranged on the back support 1, and a plurality of inwards concave lifting gears 1-2 are formed on the bottom side of the sliding chute 1-1; a sliding block 2-1 which is in sliding embedded with the sliding groove 1-1 is arranged on the chair back 2, a clamping block 2-2 which is rotatably installed is arranged on the sliding block 2-1, and the clamping block 2-2 can be clamped on the lifting gear 1-2 under the action of a return spring.

When the chair works actually, a user lifts the chair back 2 upwards, so that the clamping of the clamping block 2-2 and different lifting gears 1-2 can be realized, and further the height gear adjustment of the chair back 2 is realized; when the chair back 2 rises to the highest gear, the clamping block 2-2 is directly contacted with the bottom side of the sliding groove 1-1 and further drops out of the lifting gear 1-2, and then rapidly slides to the lowest position of the sliding groove 1-1 under the action of the self weight of the chair back 2; when the chair back 2 is continuously and slowly lifted to the position of the lifting gear 1-2, the clamping block 2-2 can be automatically clamped into the lifting gear 1-2 under the action of the return spring, so that the height of the chair back 2 is readjusted.

Compared with the prior art, according to the chair back lifting adjusting mechanism provided by the embodiment, the lifting gears 1-2 are arranged to be in the concave structure, the chair back 2 can automatically descend after being adjusted to the highest position, a slotted hole, a ring-shaped spring, a slope and the like are not required to be arranged, the structure is simpler, and the operation is very convenient. Meanwhile, the sliding embedded structure of the sliding groove 1-1 and the sliding block 2-1 ensures that the lifting of the chair back 2 is very stable and the reliability is good.

In this embodiment, preferably, a highest limiting protrusion 1-3 and a lowest limiting protrusion 1-4 protruding outward are further formed on the bottom side of the sliding groove 1-1, and the highest limiting protrusion 1-3 and the lowest limiting protrusion 1-4 are respectively located on the upper side and the lower side of the lifting gear 1-2. The slider 2-1 moves between the highest limit projection 1-3 and the lowest limit projection 1-4, which has higher adjustment efficiency.

In this embodiment, preferably, an installation groove 2-3 is formed in the slider 2-1, and preferably, the fixture block 2-2 is rotatably installed in the installation groove 2-3. Thus, the stability of the operation of the cartridge 2-2 can be ensured. Preferably, a connecting column 2-4 is arranged on one side, away from the lifting gear 1-2, of the fixture block 2-2, and the return spring is sleeved on the connecting column 2-4, so that the assembly is convenient. In some embodiments, a connecting hole can be used instead of the connecting column, and the spring is inserted into the connecting hole.

In this embodiment, the back support 1 is preferably a hollow support, the sliding grooves 1-1 are respectively arranged on two sides of the hollow support, and the sliding blocks 2-1 matched with the corresponding sliding grooves 1-1 are respectively arranged on two sides of the back 2. Therefore, the force application of the two sides of the chair back 2 to the back bracket 1 is relatively balanced, and the price rise adjustment of the chair back 2 is more stable and reliable.

As shown in connection with fig. 5, a seat includes: the chair comprises a chair seat 3, armrests 4 arranged on the chair seat 3, a back support 1, a chair back 2 connected with the back support 1, and a headrest 5 connected with the chair back 2; the chair is characterized in that the chair back 2 is connected with the back bracket 1 through the chair back lifting adjusting mechanism.

More specifically, a lumbar support 6 is arranged on the chair back 2, and the lumbar support 6 has certain elasticity and protrudes in an arc shape towards one side of the chair seat 3. In this embodiment, the lumbar support 6 is preferably a net frame structure, and the lower side of the net frame structure is suspended above the seat 3; thus, the elastic force and the reset effect are the most excellent.

The armrests 4 comprise a left armrest and a right armrest which are positioned on two sides of the seat 3, and a first adjusting switch for adjusting the height of the seat and a second adjusting switch for adjusting the pitch angle of the back support are respectively arranged on the left armrest and the right armrest. For the specific control structure and principle of the first regulating switch and the second regulating switch, reference may be made to the patent application with publication number CN111802843A, which was previously applied by the applicant, and details are not repeated herein.

Preferably, the bottom of the chair seat 3 is provided with an expansion bracket, and the front end of the expansion bracket is rotatably connected with a foot rest 7; an angle regulator for controlling the rotation angle of the foot rest is arranged between the telescopic frame and the foot rest 8. For the specific installation structure of the telescopic frame, the foot rest 7 and the angle adjuster, reference may be made to the utility model patent with publication number CN213282255U previously applied by the applicant, and detailed description thereof is omitted.

Furthermore, an up-down height adjustable structure is formed between the headrest 5 and the chair back 2 so as to be matched with different people for use. The structure of the adjustable height between the headrest 5 and the backrest 2 can be designed by referring to the backrest lifting adjusting mechanism, and is not described in detail herein.

It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the utility model is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the utility model as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. A chair back lift adjustment mechanism comprising: the chair comprises a back bracket and a chair back which are assembled together, wherein the chair back can slide up and down relative to the back bracket; the back support is characterized in that a sliding chute is arranged on the back support, and a plurality of inwards concave lifting gears are formed on the bottom side of the sliding chute; the chair back is provided with a sliding block which is in sliding embedded with the sliding groove, the sliding block is provided with a clamping block which is installed in a rotating mode, and the clamping block can be clamped on the lifting gear under the action of a return spring.

2. The chair back lifting adjusting mechanism as claimed in claim 1, wherein a highest limit protrusion and a lowest limit protrusion protruding outward are formed at a bottom side of the sliding groove, and the highest limit protrusion and the lowest limit protrusion are respectively located at an upper side and a lower side of the lifting gear.

3. The chair back lift adjustment mechanism of claim 1, wherein an installation slot is provided on the slider, and the latch is rotatably mounted in the installation slot.

4. The chair back lifting adjusting mechanism according to claim 1, wherein a connecting column or a connecting hole is arranged on one side of the clamping block away from the lifting gear, and the return spring is sleeved on the connecting column or inserted in the connecting hole.

5. The chair back lifting adjusting mechanism according to claim 1, wherein the back support is a hollow support, the sliding grooves are respectively arranged on two sides of the hollow support, and the sliding blocks matched with the corresponding sliding grooves are respectively arranged on two sides of the chair back.

6. A seat, comprising: the chair comprises a chair seat, armrests and a back support which are arranged on the chair seat, a chair back connected with the back support, and a headrest connected with the chair back; the chair back is characterized in that the chair back and the back bracket are connected through the chair back lifting adjusting mechanism according to any one of claims 1 to 5.

7. The chair according to claim 6, wherein a lumbar support is provided on the backrest, said lumbar support having a certain elasticity and protruding in an arc shape toward a side where the seat is located; the waist rest is of a net frame structure, and the lower side of the net frame structure is suspended at the upper side of the chair seat.

8. The chair according to claim 6, wherein the armrests comprise a left armrest and a right armrest which are arranged on two sides of the chair seat, and a first adjusting switch for adjusting the height of the chair seat and a second adjusting switch for adjusting the pitch angle of the back support are respectively arranged on the left armrest and the right armrest.

9. The chair according to claim 6, wherein an expansion bracket is arranged at the bottom of the chair seat, and a foot rest is rotatably connected to the front end of the expansion bracket; an angle regulator for controlling the rotation angle of the foot rest is arranged between the telescopic frame and the foot rest.

10. The chair as claimed in claim 6, wherein the headrest and the back are adjustable in height.