CN214548362U

CN214548362U - Anti-falling height-adjustable office chair

Info

Publication number: CN214548362U
Application number: CN202120917353.3U
Authority: CN
Inventors: 付德才; 王鲁健
Original assignee: Hangzhou Aofeisi Technology Co ltd
Current assignee: Hangzhou Aofeisi Technology Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-11-02
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to the technical field of office chairs, and discloses an office chair with adjustable height and falling prevention, which comprises a bottom plate and a lifting mechanism arranged on the bottom plate, wherein a supporting mechanism is arranged on the lifting mechanism, the lifting mechanism comprises a screw rod, a pinion, a positive and negative rotating motor and a gear wheel, the supporting mechanism comprises a chair, a sliding block and a supporting rod, a backrest is arranged on the top surface of the chair, a sliding groove is arranged on one side of the backrest, the sliding block is arranged inside the sliding groove, the supporting rod is arranged in the middle of the sliding block, a clamping groove is arranged on the top surface of the chair, the bottom end of the supporting rod is matched with the clamping groove, and by arranging the sliding block and the supporting rod, when the bottom end of the sliding block is clamped into the clamping groove, the device is an office chair, when the sliding block is vertically placed and the bottom end is placed on the horizontal ground, the device is a deck chair, compared with the prior art, the device has sufficient stability and is not easy to topple.

Description

Anti-falling height-adjustable office chair

Technical Field

The utility model belongs to the technical field of the office chair, concretely relates to but prevent down height-adjusting's office chair.

Background

The rapid development of society drives the improvement of economic level, and as the second major economic entity in the world, the economic income and the consumption expenditure of the national people in China reach higher levels, so that the functional requirements and the quality requirements on living goods and working goods are higher and higher.

As office chairs essential for office, the articles on the market are various, the office chairs have single-function lifting office chairs and also have multifunctional but impractical massage chairs, and a plurality of office chairs have the function of putting down the backrest, so that a temporary rest place is provided for workers needing to have a break in the office.

However, the existing lifting office chair has insufficient stability when the backrest is put down, the stability is provided only by the support legs at the bottom of the chair, the whole backrest is suspended and dangerous, and a worker is easy to unbalance to fall down when lying on the backrest for sleeping.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but prevent falling down height-adjusting's office chair and come into operation to the not enough problem of stability when putting down of back is proposed in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a prevent down adjustable height's office chair, includes the bottom plate and sets up elevating system on the bottom plate, the last supporting mechanism that is provided with of elevating system, elevating system includes lead screw, pinion, positive reverse motor and gear wheel.

The supporting mechanism comprises a seat, a sliding block and a supporting rod, a backrest is mounted on the top surface of the seat, a sliding groove is formed in one side of the backrest, the sliding block is mounted inside the sliding groove, the supporting rod is mounted in the middle of the sliding block, a clamping groove is formed in the top surface of the seat, and the bottom end of the supporting rod is matched with the clamping groove; the inside mounting of sliding tray has the extension spring, the top fixed connection of extension spring the sliding block, just the bottom fixed connection of extension spring the inner wall of sliding tray.

Preferably, the bottom plate is rectangular, and four corners of the bottom surface of the bottom plate are fixedly provided with the supporting legs.

Preferably, the quantity of lead screw is four, four the lead screw is all installed the bottom surface of seat, four the equal threaded connection in surface of lead screw has the pinion, the bottom surface at the bottom plate is installed to the motor that is just reversing, the output shaft of the motor that is just reversing runs through the top surface of bottom plate, the gear wheel is installed on the top of the motor output shaft that is just reversing, gear wheel and four intermeshing between the pinion.

Preferably, the top surface of the bull gear is provided with a limiting plate, and the bottom surface of the limiting plate is in contact with the bottom surfaces of the four pinions.

Preferably, the movable hole has been seted up on the sliding block, the axis of rotation is all installed to the both sides of bracing piece, the bracing piece passes through the axis of rotation and installs the inside at the sliding block.

Preferably, the length of the supporting rod is larger than the horizontal height of the seat, and when the supporting rod is vertically placed, the included angle between the backrest and the bottom surface is 15-30 degrees.

The utility model discloses a technological effect and advantage: this prevent down adjustable height's office chair through setting up sliding block and bracing piece, when the bottom card of sliding block advances the draw-in groove, this device is exactly an office chair, when placing the sliding block is vertical and place the bottom on level ground, this device is exactly a deck chair this moment, and for prior art, this device stability is sufficient, is difficult for empting.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic view of the structure of the present invention;

FIG. 3 is a schematic structural view of the support rod of the present invention when vertically placed;

fig. 4 is the schematic view of the connection relationship between the sliding block and the supporting rod of the present invention.

In the figure: 1. a base plate; 110. a support leg; 2. a lifting mechanism; 210. a screw rod; 220. a pinion gear; 230. a positive and negative rotation motor; 240. a bull gear; 250. a limiting plate; 3. a support mechanism; 310. a seat; 320. a backrest; 330. a sliding groove; 340. a slider; 350. a support bar; 360. a card slot; 370. a tension spring; 380. a movable hole; 390. and rotating the shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a but prevent down high office chair as shown in fig. 1-4, be in including bottom plate 1 and setting elevating system 2 on the bottom plate 1, the last supporting mechanism 3 that is provided with of elevating system 2, elevating system 2 includes lead screw 210, pinion 220, positive and negative motor 230 and gear wheel 240.

The supporting mechanism 3 comprises a seat 310, a sliding block 340 and a supporting rod 350, wherein the top surface of the seat 310 is provided with a backrest 320, one side of the backrest 320 is provided with a sliding groove 330, the sliding block 340 is arranged inside the sliding groove 330, the supporting rod 350 is arranged in the middle of the sliding block 340, the top surface of the seat 310 is provided with a clamping groove 360, and the bottom end of the supporting rod 350 is matched with the clamping groove 360; the internally mounted of sliding tray 330 has extension spring 370, the top fixed connection of extension spring 370 sliding block 340, just the bottom fixed connection of extension spring 370 the inner wall of sliding tray 330, with the bottom card of bracing piece 350 into the draw-in groove 360 in, during user's back 320, bracing piece 350 can give back 320 holding power, this moment this device is exactly an office chair, when user needs the flat rest of lying, take out the bottom of bracing piece 350 from the draw-in groove 360 to support bracing piece 350 subaerial at the level, bracing piece 350 forms stable triangle-shaped mechanism with back 320 this moment, for prior art, this device stability is sufficient, is difficult for empting.

Specifically, the bottom plate 1 is rectangular, and the four corners of the bottom surface of the bottom plate 1 are fixedly provided with the supporting legs 110.

Specifically, the number of the screw rods 210 is four, four screw rods 210 are all installed on the bottom surface of the seat 310, the surfaces of the four screw rods 210 are all in threaded connection with the pinions 220, the forward and reverse motor 230 is installed on the bottom surface of the bottom plate 1, the output shaft of the forward and reverse motor 230 penetrates through the top surface of the bottom plate 1, the top end of the output shaft of the forward and reverse motor 230 is provided with the bull gear 240, the bull gear 240 is meshed with the four pinions 220, a control switch of the forward and reverse motor 230 is turned on, the forward and reverse motor 230 drives the bull gear 240 to rotate, meanwhile, the four pinions 220 are also driven, and when the four pinions 220 rotate, the screw rods 210 sleeved in the middles of the pinions 220 perform upward or downward linear motion, so that the height of the seat 310 is adjusted.

Specifically, the top surface of the bull gear 240 is provided with a limiting plate 250, the bottom surface of the limiting plate 250 contacts the bottom surfaces of the four pinions 220, and the limiting plate 250 prevents the pinions 220 from moving upward.

Specifically, the sliding block 340 is provided with a movable hole 380, the two sides of the supporting rod 350 are both provided with a rotating shaft 390, and the supporting rod 350 is installed inside the sliding block 340 through the rotating shaft 390, so that the rotating shaft 390 can rotate.

Specifically, the length of the supporting rod 350 is greater than the horizontal height of the seat 310, and when the supporting rod 350 is vertically placed, the included angle between the backrest 320 and the bottom surface is between 15 ° and 30 °.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. An anti-falling height-adjustable office chair comprises a bottom plate (1) and a lifting mechanism (2) arranged on the bottom plate (1), wherein a supporting mechanism (3) is arranged on the lifting mechanism (2), and the lifting mechanism (2) comprises a screw rod (210), a small gear (220), a forward and reverse motor (230) and a large gear (240);

the supporting mechanism (3) comprises a seat (310), a sliding block (340) and a supporting rod (350), a backrest (320) is installed on the top surface of the seat (310), a sliding groove (330) is formed in one side of the backrest (320), the sliding block (340) is installed inside the sliding groove (330), the supporting rod (350) is installed in the middle of the sliding block (340), a clamping groove (360) is formed in the top surface of the seat (310), and the bottom end of the supporting rod (350) is matched with the clamping groove (360); the internally mounted of sliding tray (330) has extension spring (370), the top fixed connection of extension spring (370) sliding block (340), just the bottom fixed connection of extension spring (370) the inner wall of sliding tray (330).

2. An anti-fall height-adjustable office chair as claimed in claim 1, wherein: the bottom plate (1) is rectangular, and four corners of the bottom surface of the bottom plate (1) are fixedly provided with supporting legs (110).

3. An anti-fall height-adjustable office chair as claimed in claim 1, wherein: the quantity of lead screw (210) is four, four lead screw (210) are all installed the bottom surface of seat (310), four the equal threaded connection in surface of lead screw (210) has pinion (220), the bottom surface at bottom plate (1) is installed in positive and negative motor (230), the output shaft of positive and negative motor (230) runs through the top surface of bottom plate (1), gear wheel (240) is installed on the top of positive and negative motor (230) output shaft, gear wheel (240) and four intermeshing between pinion (220).

4. An anti-fall height-adjustable office chair as claimed in claim 2, wherein: the top surface of the bull gear (240) is provided with a limiting plate (250), and the bottom surface of the limiting plate (250) is in contact with the bottom surfaces of the four pinions (220).

5. An anti-fall height-adjustable office chair as claimed in claim 1, wherein: the sliding block (340) is provided with a movable hole (380), the two sides of the supporting rod (350) are provided with a rotating shaft (390), and the supporting rod (350) is arranged inside the sliding block (340) through the rotating shaft (390).

6. An anti-fall height-adjustable office chair as claimed in claim 1, wherein: the length of the support rod (350) is larger than the horizontal height of the seat (310), and when the support rod (350) is vertically placed, the included angle between the backrest (320) and the bottom surface is 15-30 degrees.