CN219962343U - Chair back with adjustable waist rest - Google Patents

Abstract

The utility model provides a seat backrest with an adjustable waist rest, which comprises a seat backrest, a seat cushion, four-way adjusting components and a backrest waist rest, wherein the seat cushion is fixedly arranged at the lower end of the seat backrest, the four-way adjusting components are rotatably arranged on the seat backrest, and the backrest waist rest is fixedly arranged on the four-way adjusting components. The four-way adjusting assembly adjusts the upper and lower heights of the backrest lumbar support through the screw transmission, has a simple structure, has higher stability, can not cause subsequent damage to cause accidental injury to the waist of a user, has excellent adjusting precision, and can adjust the front and rear protruding heights of the backrest in a mode of injecting air pressure, so that the mode is simpler and can be adjusted quickly.

Description

Chair back with adjustable waist rest

Technical Field

The utility model belongs to the technical field of seats, and particularly relates to a seat back with an adjustable lumbar support.

Background

The seat is mainly composed of a backrest, a lumbar support and a cushion, in order to meet the requirements of people of different sizes, the lumbar support of the existing seat can be adjusted up, down, front and back, for example, the lumbar support is adjustable, which is described in Chinese patent publication No. CN217090083U, and is adjusted by driving two steel wire ropes through two adjusting knobs respectively, and then the elastic force of a spring and a lumbar support main body is matched, so that the adjustment method is complex in structure, and meanwhile, the adjustment is carried out through pulling by the steel wire ropes, so that the follow-up steel wires have the risk of breaking, the probability of injury to the waist of the person is caused after the steel wire ropes break, and certain potential safety hazards are provided.

Therefore, it is necessary to invent a seat back with an adjustable lumbar support.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a seat back with an adjustable lumbar support, which comprises a seat back, a seat cushion, a four-way adjusting assembly and a back lumbar support, wherein the seat cushion is fixedly arranged at the lower end of the seat back, the four-way adjusting assembly is rotatably arranged on the seat back, and the back lumbar support is fixedly arranged on the four-way adjusting assembly;

the four-way adjusting assembly comprises a driving worm, a rotating handle, driven worm wheels, a lifting screw rod, a lifting nut, a fixed base and a pressurizing air pump, one end of the driving worm rotates to penetrate through the seat backrest to be fixedly connected with the rotating handle, the other end of the driving worm is rotatably installed inside the seat backrest, the driving worm is correspondingly meshed with the two driven worm wheels, the driven worm wheels are fixedly installed at the upper end of the lifting screw rod, the lifting nut is installed on the lifting screw rod in a threaded manner, the lifting nut is fixedly installed on the inner side surface of the backrest lumbar support, and the pressurizing air pump is fixedly installed on the inner side of the backrest lumbar support and is mutually communicated; the lower end of the lifting screw rod is fixedly provided with a fixed base, and the fixed base is rotatably arranged in the seat backrest.

Preferably, the seat back includes the seat back main part, parcel back body, the seat headrest, back interior welt and lift strip groove, the both sides fixed mounting of seat back main part has parcel back body, the top fixed mounting of seat back main part has the seat headrest, the inboard fixed mounting of seat back main part has back interior welt, three lift strip groove has been seted up on the back interior welt, the lifting nut slides and passes lift strip groove and backrest waist and lean on fixedly link to each other, backrest waist lean on inboard fixed mounting's pressurization air pump fixed mounting in the inside of seat back main part, the below fixed mounting of seat back main part has the seat cushion, fixed base and driving worm are installed to the seat back main part internal rotation.

Preferably, the air leakage port is fixedly arranged on one side surface of the backrest and lumbar support, the backrest and lumbar support is composed of a lumbar support jacket, a lumbar support body and a lumbar support air bag, the lumbar support air bag of the backrest and lumbar support is communicated with the pressurizing air pump, the lumbar support body of the backrest and lumbar support is fixedly connected with the lifting nut, and the lumbar support body of the backrest and lumbar support is an arc-shaped frame made of spring steel.

Compared with the prior art, the utility model has the following beneficial effects:

the four-way adjusting component is mainly of a screw rod structure, the four-way adjusting component adjusts the upper and lower heights of the backrest lumbar support through screw transmission, the structure is simple, the stability is high, the problem that the waist of a user is accidentally injured due to subsequent damage is avoided, the adjusting precision is excellent, in addition, the front and rear protruding heights of the backrest are adjusted in a mode of injecting air pressure, the mode is simpler, and the adjustment can be fast.

Drawings

Fig. 1 is a schematic view of the assembled structure of the present utility model.

Fig. 2 is a schematic view of the rear structure of fig. 1 according to the present utility model.

Fig. 3 is a schematic view of the structure of the four-way adjustment assembly of the present utility model.

In the figure:

the seat back 1, the seat back main body 11, the wrapping backrest body 12, the seat headrest 13, the backrest lining plate 14, the lifting bar groove 15, the seat cushion 2, the four-way adjusting assembly 3, the driving worm 31, the rotating handle 32, the driven worm wheel 33, the lifting screw 34, the lifting nut 35, the fixed base 36, the pressurized air pump 37 and the backrest lumbar support 4.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution of the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the embodiments, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 3:

the utility model provides a seat backrest with an adjustable waist rest, which comprises a seat backrest 1, a seat cushion 2, a four-way adjusting assembly 3 and a backrest waist rest 4, wherein the lower end of the seat backrest 1 is fixedly provided with the seat cushion 2, the four-way adjusting assembly 3 is rotatably arranged on the seat backrest 1, the backrest waist rest 4 is fixedly arranged on the four-way adjusting assembly 3, the four-way adjusting assembly 3 comprises a driving worm 31, a rotating handle 32, a driven worm wheel 33, a lifting screw 34, a lifting nut 35, a fixed base 36 and a pressurizing air pump 37, one end of the driving worm 31 is rotatably connected with the rotating handle 32 through the seat backrest 1, the other end of the driving worm 31 is rotatably arranged in the seat backrest 1, the driving worm 31 is correspondingly meshed with two driven worm wheels 33, the driven worm wheels 33 are fixedly arranged at the upper end of the lifting screw 34, the lifting screw 34 is in threaded manner and is provided with a lifting nut 35, the lifting nut 35 is fixedly arranged on the inner side surface of the backrest waist rest 4, and the pressurizing air pump 37 is fixedly arranged on the inner side of the backrest waist rest 4 and communicated with each other; a fixed base 36 is fixedly arranged at the lower end of the lifting screw 34, the fixed base 36 is rotatably arranged inside the seat back 1, and the rest structures are arranged inside the seat back 1 except that the rotating handle 32 of the four-way adjusting assembly 3 is arranged above the outside of the seat back 1.

Embodiment one:

specifically, the seat back 1 includes a seat back main body 11, a wrapping back main body 12, a seat headrest 13, a back lining plate 14 and lifting bar grooves 15, the wrapping back main body 12 is fixedly installed on two sides of the seat back main body 11, the seat headrest 13 is fixedly installed above the seat back main body 11, the back lining plate 14 is fixedly installed on the inner side of the seat back main body 11, three lifting bar grooves 15 are formed on the back lining plate 14, the lifting nuts 35 slide through the lifting bar grooves 15 to be fixedly connected with the backrest lumbar support 4, a pressurizing air pump 37 fixedly installed on the inner side of the backrest lumbar support 4 is fixedly installed inside the seat back main body 11, the seat cushion 2 is fixedly installed below the seat back main body 11, a fixing base 36 and a driving worm 31 are installed in the seat back main body 11 in a rotating mode, lifting nuts 35 are installed in the two lifting bar grooves 15 in a sliding mode, and an air injection head of the pressurizing air pump 37 slides in the other lifting bar grooves 15.

Specifically, a gas leakage port is fixedly installed on one side surface of the backrest lumbar support 4, the backrest lumbar support 4 is composed of a lumbar support jacket, a lumbar support body and a lumbar support airbag, the lumbar support airbag of the backrest lumbar support 4 is communicated with a pressurizing air pump 37, the lumbar support body of the backrest lumbar support 4 is fixedly connected with a lifting nut 35, the lumbar support body of the backrest lumbar support 4 is an arc-shaped frame made of spring steel, and the lumbar support jacket, the lumbar support body and the lumbar support airbag are sequentially arranged from outside to inside and fixedly installed together to form the backrest lumbar support 4.

Embodiment two:

when the user needs to adjust the up-down height of the backrest lumbar support 4, the user rotates the rotating handle 32 of the four-way adjusting assembly 3, the rotating handle 32 drives the driving worm 31, the driving worm 31 drives the driven worm wheel 33, the driven worm wheel 33 drives the lifting screw 34, the lifting screw 34 drives the lifting nut 35 to lift, the lifting nut 35 drives the backrest lumbar support 4 to lift, so that the up-down height of the backrest lumbar support 4 is adjusted, and when the front-back protruding height of the backrest lumbar support 4 needs to be adjusted, the air in the backrest lumbar support 4 is released, or the air is injected into the backrest lumbar support 4 through the pressurizing air pump 37, so that the air pressure in the backrest lumbar support is changed, and the front-back protruding height of the backrest lumbar support 4 is adjusted.

By utilizing the technical scheme of the utility model or under the inspired by the technical scheme of the utility model, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical scheme falls into the protection scope of the utility model.

Claims (3)

1. The seat backrest with the adjustable lumbar support is characterized by comprising a seat backrest (1), a seat cushion (2), four-way adjusting assemblies (3) and a backrest lumbar support (4), wherein the seat cushion (2) is fixedly arranged at the lower end of the seat backrest (1), the four-way adjusting assemblies (3) are rotatably arranged on the seat backrest (1), and the backrest lumbar support (4) is fixedly arranged on the four-way adjusting assemblies (3);

the four-way adjusting assembly (3) comprises a driving worm (31), a rotating handle (32), a driven worm wheel (33), a lifting screw (34), a lifting nut (35), a fixed base (36) and a pressurizing air pump (37), one end of the driving worm (31) rotates to penetrate through the seat backrest (1) to be fixedly connected with the rotating handle (32), the other end of the driving worm (31) is rotatably arranged inside the seat backrest (1), the driving worm (31) is correspondingly meshed with two driven worm wheels (33), the driven worm wheel (33) is fixedly arranged at the upper end of the lifting screw (34), the lifting screw (34) is provided with the lifting nut (35) in a threaded manner, the lifting nut (35) is fixedly arranged on the inner side surface of the backrest lumbar support (4), and the pressurizing air pump (37) is fixedly arranged on the inner side of the backrest lumbar support (4) and is mutually communicated; the lower end of the lifting screw rod (34) is fixedly provided with a fixed base (36), and the fixed base (36) is rotatably arranged in the seat backrest (1).

2. The seatback with an adjustable lumbar support of claim 1 wherein: the seat backrest (1) comprises a seat backrest main body (11), a wrapping backrest main body (12), a seat headrest (13), a backrest lining plate (14) and lifting strip grooves (15), wherein the wrapping backrest main body (12) is fixedly arranged at two sides of the seat backrest main body (11), the seat headrest (13) is fixedly arranged above the seat backrest main body (11), the backrest lining plate (14) is fixedly arranged at the inner side of the seat backrest main body (11), three lifting strip grooves (15) are formed in the backrest lining plate (14), lifting nuts (35) penetrate through the lifting strip grooves (15) in a sliding mode and are fixedly connected with the backrest lumbar support (4), a pressurizing air pump (37) fixedly arranged at the inner side of the backrest lumbar support (4) is fixedly arranged inside the seat backrest main body (11), a seat cushion (2) is fixedly arranged below the seat backrest main body (11), and a fixing base (36) and a driving worm (31) are rotatably arranged inside the seat backrest main body (11).

3. The seatback with an adjustable lumbar support of claim 1 wherein: one side surface of the backrest lumbar support (4) is fixedly provided with a gas leakage port, the backrest lumbar support (4) is composed of a lumbar support coat, a lumbar support body and a lumbar support airbag, the lumbar support airbag of the backrest lumbar support (4) is communicated with a pressurizing air pump (37), the lumbar support body of the backrest lumbar support (4) is fixedly connected with a lifting nut (35), and the lumbar support body of the backrest lumbar support (4) is an arc-shaped frame made of spring steel.