CN216416565U

CN216416565U - Screw rod gear transmission type backrest waist support linkage lifting mechanism and seat

Info

Publication number: CN216416565U
Application number: CN202122803068.1U
Authority: CN
Inventors: 徐康; 陈哲; 杨润强
Original assignee: Zhejiang Hutong Ergonomics Technology Co ltd
Current assignee: Zhejiang Hutong Ergonomics Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-03
Anticipated expiration: 2031-11-16

Abstract

The utility model belongs to the field of furniture, concretely relates to screw gear drive formula back waist holds in palm linkage elevating system and seat, hold in the palm subassembly, first back subassembly, second back subassembly and drive assembly including the waist, the waist holds in the palm the subassembly and includes first moving member and first rotation piece, first back subassembly includes that second moving member and second rotate the piece, the second back subassembly includes that third moving member and third rotate the piece. The utility model discloses can realize the linkage lift that back and waist held in the palm to enlarge the whole usable floor area of the back of the chair.

Description

Screw rod gear transmission type backrest waist support linkage lifting mechanism and seat

Technical Field

The utility model belongs to the field of furniture, concretely relates to screw gear transmission type back waist holds in palm linkage elevating system and seat.

Background

The chair back module of the traditional child learning chair usually comprises a backrest and a waist support, and the backrest and the waist support are fixed structures and cannot be adjusted in a lifting way.

Chinese patent publication No. CN211883060U discloses a three-segment adjustable seat back and seat, wherein a lumbar support device, a back support device and a neck support device are installed on a support frame of the seat back from bottom to top, a main control board, a support position adjusting mechanism and a support force adjusting mechanism are further provided, the main control board can drive the lumbar support device through the support position adjusting mechanism, the back support device and the neck support device move up and down along the support frame and fix the lumbar support device, the back support device and the neck support device on the support frame, and can adjust the support force of the lumbar support device, the back support device and the neck support device to the human body when the human body leans against the seat back in a normal posture through the support force adjusting mechanism, so that the seat with the seat back can adapt to different body types of seats by adjusting the height of the lumbar support device, the back support device and the support force of the neck support device on the support frame and the support force to the human body The human body can obtain good comfort for human bodies with different body types.

The above patent has the following problems:

1) the waist support and the backrest need to be respectively controlled to lift through two motors, so that the cost is high, and the linkage of the waist support and the backrest cannot be realized;

2) the area of the whole structure of the chair back can not be enlarged, and the chair can not be matched with people with different heights and sizes.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the defects of the prior art, the utility model provides a screw gear transmission type backrest waist support linkage lifting mechanism and a seat technical scheme.

The utility model provides a pair of screw gear transmission type back waist holds in palm linkage elevating system, include:

the waist support assembly comprises a first moving piece for mounting the waist support and a first rotating piece in threaded fit with the first moving piece;

a first backrest assembly including a second moving member to mount a first backrest and a second rotating member to be screw-engaged with the second moving member;

the first backrest component and the second backrest component are oppositely arranged at the left and right sides, and the waist support component is positioned below the first backrest component and the second backrest component;

the transmission assembly is used for simultaneously driving the first rotating piece, the second rotating piece and the third rotating piece to rotate; and

a power source to drive the transmission assembly.

It can be understood that the above technical scheme drives the first rotating member, the second rotating member and the third rotating member to rotate through the transmission assembly, and the linkage lifting of the waist support and the backrest can be realized.

Furthermore, the transmission assembly comprises a gear box, the gear box is provided with an input end in transmission fit with the power source, a first output shaft, a second output shaft in transmission fit with the second rotating piece and a third output shaft in transmission fit with the third rotating piece, and the first output shaft is the first rotating piece or is fixedly connected with the first rotating piece.

It can be understood that, in the above technical scheme, the transmission assembly is preferably a gear box, one end is input into the gear box, and the output from the other end is realized through the gear box, so that the purpose of simultaneously driving the waist support assembly, the first backrest assembly and the second backrest assembly to move through one power source is realized. And the setting of the gear ratio of the gearbox is also a well-known technique that is relatively easy to implement.

Furthermore, the second rotating part is in transmission fit with the second output shaft through bevel gears; and the third rotating part is in transmission fit with the third output shaft through bevel gears.

It can be appreciated that the bevel gear transmission structure can change the transmission direction, and is convenient for the first backrest assembly and the second backrest assembly to be arranged obliquely.

Further, the gear box is a bevel gear box.

It will be appreciated that this is the preferred construction of the gearbox.

Further, when the power source drives the waist support assembly, the first backrest assembly and the second backrest assembly to move simultaneously through the transmission assembly, in the vertical direction, the moving speed of the first moving piece is smaller than that of the second moving piece and that of the third moving piece.

Above-mentioned technical scheme is through the work of a power supply drive transmission assembly, drives three rotation piece through transmission assembly and rotates, rotates the piece and passes through the spiral shell structure again and drive the moving member that corresponds and remove, obviously, just can make the moving speed of first moving member be less than the moving speed of second moving member and third moving member very easily through transmission assembly's drive ratio setting.

Furthermore, the first backrest assembly and the second backrest assembly are respectively arranged in an inclined mode, and the first backrest assembly and the second backrest assembly form an inverted splayed structure.

It can be understood that the splayed structure can enable the space between the first backrest assembly and the second backrest assembly to be enlarged when the second moving piece and the third moving piece ascend simultaneously by setting the first backrest assembly and the second backrest assembly, and then the area of the chair back is increased.

Further, the power source is a manual input structure or an electric input structure.

It can be understood that manual input structure or electronic input structure all can realize the beneficial effects of the utility model.

Furthermore, elevating system still includes the base that is used for installing waist support subassembly, first back subassembly, second back subassembly, transmission subassembly and power supply.

It can be understood that, hold in the palm subassembly, first back subassembly, second back subassembly, drive assembly and power supply through the base to the waist and install, make overall structure compacter, the base hides drive assembly inside it moreover, makes the utility model discloses the appearance is more pleasing to the eye.

Further, at least one of the lumbar support component, the first backrest component and the second backrest component is of a threaded telescopic structure.

It can be understood that the moving key in the thread telescopic structure can cover the rotating part and can also be used for making the utility model discloses the appearance is more pleasing to the eye.

Compared with the prior art, the utility model provides a pair of lead screw gear transmission type back waist holds in palm linkage elevating system has passed through waist and has held in the palm following beneficial effect of subassembly, first back subassembly, second back subassembly, drive assembly, power supply isotructure realization:

1) the linked lifting of the backrest and the waist support can be realized;

2) when the backrest and the waist support are lifted, the distance between the backrest and the waist support in the vertical direction is increased, so that the whole use area of the backrest is increased;

3) when the first backrest and the second backrest ascend, the distance between the first backrest and the second backrest in the horizontal direction is increased, and the whole use area of the chair back is further increased;

4) simple and compact structure, convenient operation and low cost.

The utility model also provides a seat, the back of the chair module of seat includes that the waist holds in the palm, first back, second back and as above elevating system, elevating system's first moving member and waist hold in the palm the cooperation and be connected, elevating system's second moving member is connected with the cooperation of first back, elevating system's third moving member is connected with the cooperation of second back.

The utility model provides a seat includes foretell elevating system, because the concrete structure of elevating system, relation of connection and beneficial effect etc. have carried out detailed description in above-mentioned characters, no longer give unnecessary details here.

Drawings

Fig. 1 is a schematic view of an internal structure of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the utility model;

fig. 2 is a schematic view of an exploded structure of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the utility model;

fig. 3 is one of the schematic back structures of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the present invention;

fig. 4 is one of the front structural schematic diagrams of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the present invention;

fig. 5 is a second schematic view of a back structure of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the present invention;

fig. 6 is a second schematic view of a front structure of a screw gear transmission type backrest waist support linkage lifting mechanism provided by the present invention;

fig. 7 is a schematic view of a seat structure provided by the present invention;

fig. 8 is a second schematic view of a seat structure according to the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "the outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1-6, the present invention provides a screw gear transmission type backrest waist support linkage lifting mechanism, which comprises a waist support assembly, a first backrest assembly, a second backrest assembly, a transmission assembly and a power source.

The waist support assembly comprises a first moving part 2 for mounting the waist support 1 and a first rotating part 3 for being in threaded fit with the first moving part 2.

The first backrest module includes a second moving member 5 for mounting the first backrest 4 and a second rotating member 6 for screw-coupling with the second moving member 5.

The second backrest component comprises a third moving piece 8 used for installing the second backrest 7 and a third rotating piece 11 used for being in threaded fit with the third moving piece 8, the first backrest component and the second backrest component are arranged oppositely in the left-right direction, and the waist support component is located below the first backrest component and the second backrest component.

The transmission assembly is used for simultaneously driving the first rotating member 3, the second rotating member 6 and the third rotating member 11 to rotate.

The power source is used for driving the transmission assembly to move.

When the power source drives the waist support assembly, the first backrest assembly and the second backrest assembly to move simultaneously through the transmission assembly, the moving speed of the first moving piece 2 is lower than that of the second moving piece 5 and that of the third moving piece 8 in the vertical direction.

Wherein, the first moving part 2, the second moving part 5 and the third moving part 8 are collectively called as moving parts; the first rotating member 3, the second rotating member 6, and the third rotating member 11 are collectively referred to as a rotating member; the first moving piece 2 is fixed with a waist support mounting piece 200, and the first moving piece 2 is fixed with the waist support 1 through the waist support mounting piece 200; the first backrest mounting part 500 is fixed on the second moving part 5, and the second moving part 5 is fixed with the first backrest 4 through the first backrest mounting part 500; the third moving part 8 is fixed with a second backrest installation part 800, and the third moving part 8 is fixed with the second backrest 7 through the second backrest installation part 800.

With continued reference to fig. 1, the transmission assembly includes a gear box 9, and the transmission assembly may also adopt other transmission structures besides the gear box 9, and the gear box 9 has an input end 900 in transmission cooperation with the power source, a first output shaft, a second output shaft 901 in transmission cooperation with the second rotating member 6, and a third output shaft 902 in transmission cooperation with the third rotating member 11. In the present embodiment, the first output shaft is preferably the first rotor 3, and in other embodiments, the first output shaft may be fixedly connected to the first rotor 3 by means of an integral connection, a screw connection, a coupling connection, or the like. The first rotating member 3 is vertically disposed at the bottom of the gear box 9, the second output shaft 901 is horizontally disposed at the left side of the gear box 9, and the third output shaft 902 is horizontally disposed at the right side of the gear box 9.

With continued reference to fig. 1, the second rotating member 6 is in bevel gear engagement with the second output shaft 901. Specifically, the lower end of the second rotating member 6 and the left end of the second output shaft 901 are both rotatably connected to a first transmission box 15, the left end of the second output shaft 901 is provided with a first bevel gear 13, the lower end of the second transmission member 6 is provided with a second bevel gear 14, the first bevel gear 13 is meshed with the second bevel gear 14, and the first bevel gear 13 and the second bevel gear 14 are located in the first transmission box 15.

With continued reference to fig. 1, the third rotating member 11 is in bevel gear engagement with the third output shaft 903. Specifically, the lower end of the third rotating member 11 and the right end of the third output shaft 902 are both rotatably connected to a second transmission box 18, the right end of the third output shaft 902 is provided with a third bevel gear 16, the lower end of the third transmission member 11 is provided with a fourth bevel gear 17, the third bevel gear 16 is engaged with the fourth bevel gear 17, and the third bevel gear 16 and the fourth bevel gear 17 are located in the second transmission box 18.

With continued reference to fig. 1, the gearbox 9 is preferably a bevel gearbox. Specifically, the input end 900 is a fifth bevel gear 900, a sixth bevel gear 903 is arranged at the upper end of the first rotating member 3, a seventh bevel gear 904 is arranged at the right end of the second output shaft 901, an eighth bevel gear 905 is arranged at the left end of the third output shaft 902, and the sixth bevel gear 903, the seventh bevel gear 904 and the eighth bevel gear 905 are respectively engaged with the fifth bevel gear 900.

The gear box 9, the first transmission case 15 and the second transmission case 18 are all of separate structures and are fixed by bolt combination.

In addition, other configurations of the gearbox may be used.

With continued reference to fig. 1, the power source is a manual input structure, preferably a rotary switch 12, the rotary switch 12 includes a knob and an input shaft, and the input shaft is in driving engagement with the input end 900.

In some embodiments, the power source may also be an electric input structure, such as an electric motor.

With reference to fig. 1, the first backrest module and the second backrest module are respectively disposed in an inclined manner, and form an inverted-splayed structure, and the waist support module, the first backrest module and the second backrest module form a Y-shaped structure.

It can be understood that the first backrest assembly and the second backrest assembly are arranged to be of the splayed structure, so that the distance between the second moving piece 5 and the third moving piece 8 is increased when the two moving pieces ascend simultaneously, and the area of the chair back is increased.

It should be noted that, the utility model provides a first back subassembly and second back subassembly also can vertical setting, and when second moving member 5 and third moving member 8 rose simultaneously like this, interval between them remains unchanged, but first moving member 2 still can the grow with the interval of second moving member 5 and third moving member 8, still can increase the area of the back of the chair.

With continued reference to fig. 1 and 2, the lifting mechanism further includes a base 10 for mounting the lumbar support assembly, the first backrest assembly, the second backrest assembly, the transmission assembly and the power source. Specifically, the base 10 is a split cover structure, and is fixed by a bolt combination, and the base 10 hides the structure of the transmission assembly inside; the base 10 is a Y-shaped structure, the lower end of the base is provided with a first shell 1000, the first shell 1000 is in sliding insertion fit with the first moving part 2, and the first shell 1000 provides guidance for the first moving part 2 to prevent the first moving part 2 from rotating; the upper end of the left side of the base 10 is provided with a second shell 1001, the second shell 1001 is in sliding insertion fit with the second moving part 5, and the second shell 1001 provides guidance for the second moving part 5 to prevent the second moving part 5 from rotating; the upper end of the right side of the base 10 is provided with a third housing 1002, the third housing 1002 is slidably inserted and matched with the third moving part 8, and the third housing 1002 provides guidance for the third moving part 8 to prevent the third moving part 8 from rotating.

With continued reference to fig. 1 and 2, the lumbar support assembly, the first backrest assembly and the second backrest assembly are all of a threaded telescopic structure. The moving member is the sleeve pipe structure, and the rotation piece is the screw rod structure, and the moving member overlaps outside the corresponding moving member, can avoid the moving member to expose like this.

In some embodiments, the moving member may be configured as a screw structure and the rotating member may be configured as a sleeve structure.

Lifting operation:

the rotary switch 12 is rotated, the rotary switch 12 drives the gear box 9 to work, the first output shaft of the gear box 9, namely the first rotating part 3 drives the first moving part 2 to ascend, the second output shaft 901 of the gear box 9 drives the second rotating part 6 to rotate through the bevel gear, the second rotating part 6 drives the second moving part to ascend, the third output shaft 902 of the gear box 9 drives the third rotating part 11 to rotate through the bevel gear, the third rotating part 11 drives the third moving part 8 to ascend, and the three moving parts simultaneously drive the waist support 1, the first backrest 4 and the second backrest 7 to ascend. Since the first backrest module and the second backrest module form a figure-of-eight structure, the distance between the first backrest 4 and the second backrest 7 becomes large during the ascending process. In addition, the lifting mechanism of the utility model finally enables the moving speed of the second moving part 5 and the third moving part 8 to be the same in the vertical direction through the setting of the transmission ratio of the three output ends of the gear box, the setting of the thread pitch of the first moving part 3 and the first moving part 2, the setting of the thread pitch of the second rotating part 6 and the second moving part 5, the setting of the thread pitch of the third rotating part 11 and the third moving part 8, the setting of the transmission ratio of the first bevel gear 13 and the second bevel gear 14 and the setting of the transmission ratio of the third bevel gear 16 and the fourth bevel gear 17, and the moving speed of the first moving part 2 is less than the moving speed of the second moving part 5 and the third moving part 8, therefore, the distance between the waist support 1 and the two backrests in the vertical direction is increased more and more in the ascending process of the waist support 1, the first backrest 4 and the second backrest 7, and the integral area of the chair back is increased. The setting of transmission ratio and screw pitch is the well-known technology in the mechanical field, and can be realized by adopting structures such as gears, screws and the like with proper dimensions and specifications.

The descending operation and the ascending operation are the same, and are not described again.

It should be noted that the umbrella teeth and the screwing structure of the utility model can bring self-locking effect, and after the rotary switch 12 is loosened, the positions of the waist support 1, the first backrest 4 and the second backrest 7 can not be changed.

Referring to fig. 7 and 8, the present invention further provides a seat, the seat back module of the seat includes a waist support 1, a first backrest 4, a second backrest 7 and the lifting mechanism, the first moving member 2 of the lifting mechanism is connected with the waist support 1 in a matching manner, the second moving member 5 of the lifting mechanism is connected with the first backrest 4 in a matching manner, and the third moving member 8 of the lifting mechanism is connected with the second backrest 7 in a matching manner. The first backrest 4 and the second backrest 7 are oppositely arranged left and right to form an integral backrest, and the waist support 1 is positioned at the lower ends of the first backrest and the second backrest.

The utility model has the advantages that:

(1) the waist support can move up and down, and the backrest can move obliquely, so that the size adjustment is realized;

(2) the backrest and the waist support can realize synchronous linkage under the transmission action of the screw rod and the gear;

(3) the backrest and the waist support use screw rods with different screw pitches to realize different movement speeds of the backrest and the waist support, so that the distance between the backrest and the waist support is automatically adjusted;

(4) the movement speed and the adjusting force can be adjusted by changing the screw pitch of the screw rod or the gear ratio of the gear.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a screw gear drive formula back waist holds in palm linkage elevating system which characterized in that: the method comprises the following steps:

the waist support assembly comprises a first moving part (2) for mounting the waist support (1) and a first rotating part (3) in threaded fit with the first moving part (2);

a first backrest assembly comprising a second moving member (5) for mounting the first backrest (4) and a second rotating member (6) for screw-fitting with the second moving member (5);

the second backrest component comprises a third moving part (8) used for mounting the second backrest (7) and a third rotating part (11) in threaded fit with the third moving part (8), the first backrest component and the second backrest component are oppositely arranged left and right, and the waist support component is positioned below the first backrest component and the second backrest component;

the transmission assembly is used for simultaneously driving the first rotating piece (3), the second rotating piece (6) and the third rotating piece (11) to rotate; and

a power source to drive the transmission assembly.

2. The screw rod gear transmission type backrest and waist support linkage lifting mechanism is characterized in that the transmission assembly comprises a gear box (9), the gear box (9) is provided with an input end (900) in transmission fit with a power source, a first output shaft, a second output shaft (901) in transmission fit with a second rotating member (6) and a third output shaft (902) in transmission fit with a third rotating member (11), and the first output shaft is a first rotating member (3) or is fixedly connected with the first rotating member (3).

3. The screw gear transmission type backrest and waist support linkage lifting mechanism is characterized in that the second rotating piece (6) is in transmission fit with the second output shaft (901) through bevel gears; the third rotating piece (11) is in transmission fit with the third output shaft (902) through bevel gears.

4. A screw gear transmission type backrest and lumbar support linkage lifting mechanism according to claim 2, characterized in that the gear box (9) is a bevel gear box.

5. The screw gear transmission type backrest and lumbar support linkage lifting mechanism is characterized in that when the power source drives the lumbar support assembly, the first backrest assembly and the second backrest assembly to move simultaneously through the transmission assembly, the moving speed of the first moving member (2) is lower than the moving speeds of the second moving member (5) and the third moving member (8) in the vertical direction.

6. The screw gear transmission type backrest lumbar support linkage lifting mechanism as claimed in any one of claims 1-5, wherein the first backrest assembly and the second backrest assembly are respectively arranged obliquely and form an inverted splayed structure.

7. The screw gear transmission type backrest and lumbar support linkage lifting mechanism as claimed in any one of claims 1-5, wherein the power source is a manual input structure or an electric input structure.

8. The screw gear transmission type backrest and lumbar support linkage lifting mechanism as claimed in any one of claims 1-5, wherein the lifting mechanism further comprises a base (10) for mounting the lumbar support assembly, the first backrest assembly, the second backrest assembly, the transmission assembly and the power source.

9. The screw-gear driven backrest and lumbar support linkage lifting mechanism according to any one of claims 1-5, wherein at least one of the lumbar support assembly, the first backrest assembly and the second backrest assembly is a threaded telescopic structure.

10. A seat, characterized in that the backrest module of the seat comprises a lumbar support (1), a first backrest (4), a second backrest (7) and a lifting mechanism as claimed in any of claims 1 to 9, the first moving member (2) of the lifting mechanism is connected with the lumbar support (1) in a matching manner, the second moving member (5) of the lifting mechanism is connected with the first backrest (4) in a matching manner, and the third moving member (8) of the lifting mechanism is connected with the second backrest (7) in a matching manner.