CN216908515U

CN216908515U - Dental patient chair

Info

Publication number: CN216908515U
Application number: CN202122978725.6U
Authority: CN
Inventors: 王宏斌; 林炬
Original assignee: Zhuhai Siger Medical Equipment Co ltd
Current assignee: Zhuhai Siger Medical Equipment Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-07-08
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a dental patient chair which comprises a base, a seat support frame, a backrest support frame and a backrest pitching mechanism, wherein the seat support frame is arranged on the base, the backrest support frame is connected to the seat support frame through the backrest pitching mechanism, and the backrest pitching mechanism drives the backrest support frame to perform pitching action; the seat cushion pitching linkage mechanism is driven by the backrest pitching mechanism to drive the seat support frame to move. The utility model can adjust the pitch angle of the cushion part in a linkage way by arranging the cushion pitch linkage mechanism, and can realize the adjustment of multiple parts and larger angle by matching with the adjustment of the backrest part while adjusting the pitch angle of the backrest part.

Description

Dental patient chair

Technical Field

The utility model relates to a medical instrument or a medical auxiliary instrument, in particular to a dental patient chair.

Background

The dental patient chair is medical equipment necessary for stomatologists, generally comprises a base, a chair support frame, a chair lifting mechanism, a backrest support frame, a backrest pitching mechanism and the like, and the specific structure and the working principle of the dental patient chair can refer to the content described in the patent CN 203234974U.

With the continuous improvement of the technical level of medical equipment and the increasing requirements of people on safety, comfort and convenience, the dental patient chair has greatly improved performance and intellectualization. Some dentistry patient chairs on the existing market have limited angle and position adjustment, doctors are inconvenient to work, and patients are uncomfortable to sit on or face down.

Disclosure of Invention

The utility model aims to provide a dental patient chair which can enable the angle and the position to be adjusted more flexibly.

The utility model is realized by the following technical scheme: a dental patient chair comprises a base, a seat support frame, a backrest support frame and a backrest pitching mechanism, wherein the seat support frame is arranged on the base, the backrest support frame is connected to the seat support frame through the backrest pitching mechanism, and the backrest pitching mechanism drives the backrest support frame to perform pitching motion; the seat is characterized by further comprising a cushion pitching linkage mechanism which is respectively connected with the backrest pitching mechanism and the seat support frame, and the cushion pitching linkage mechanism drives the seat support frame to move under the driving of the backrest pitching mechanism.

Preferably, the dental patient chair further comprises a seat lifting mechanism, and the seat supporting frame is arranged on the base through the seat lifting mechanism.

Preferably, the backrest pitching mechanism comprises a left side plate, a right side plate, a left arc-shaped guide rail, a right arc-shaped guide rail, a pitching driving assembly and a backrest bending plate assembly; the left side plate and the right side plate are arranged on the seat lifting mechanism at a left-right interval and synchronously lifted, the seat supporting frame is supported on the left side plate and the right side plate, and the left arc-shaped guide rail and the right arc-shaped guide rail are respectively arranged on the inner sides of the left side plate and the right side plate; one end of the backrest bent plate assembly is slidably arranged on the left and right arc-shaped guide rails, and the other end of the backrest bent plate assembly is connected with the backrest support frame; the pitching driving assembly is arranged on the seat supporting frame and drives the backrest bent plate assembly to slide along the left arc-shaped guide rail and the right arc-shaped guide rail.

Preferably, the pitching driving assembly comprises a bracket, a motor, a screw rod, a movable block and a connecting rod; the bracket is fixedly arranged below the seat supporting frame, the motor, the screw rod and the movable block are arranged on the bracket, and the motor drives the movable block to move back and forth through the screw rod; one end of the connecting rod is connected with the movable block through a first rotating shaft, and the other end of the connecting rod is connected with one end of the backrest bent plate component through a second rotating shaft.

Preferably, the backrest bending plate assembly comprises a bending plate main body part, a left arc-shaped sliding block, a right arc-shaped sliding block and a connecting piece; the left and right arc-shaped sliding blocks are arranged on the left and right sides of one end of the bent plate main body part and are respectively matched with the left and right arc-shaped guide rails, the connecting piece is arranged at the other end of the bent plate main body part, and the backrest support frame is connected with the connecting piece.

Preferably, the cushion pitching linkage mechanism comprises a left push-pull arm, a right push-pull arm, a linkage shaft, a left swing rod, a right swing rod and a left rotating support arm; one end of each of the left and right push-pull arms is connected with one end of the backrest bent plate assembly through the second rotating shaft, and the other end of each of the left and right push-pull arms is connected with one end of each of the left and right oscillating bars through the linkage shaft; the other ends of the left and right swing rods are respectively connected with the front part of the seat support frame through a third rotating shaft, a fulcrum is arranged between the one end and the other end of the left and right swing rods, and the fulcrums of the left and right swing rods are respectively connected with the front parts of the left and right side plates through a fourth rotating shaft; the left side and the right side of the rear part of the seat support frame are respectively and rotationally connected with the rear parts of the left side plate and the right side plate through the left rotating support arm and the right rotating support arm.

The utility model has the beneficial effects that: through setting up cushion every single move link gear, when adjusting back portion every single move angle, can adjust the every single move angle of cushion part jointly, the regulation of cooperation back portion can realize the regulation of many positions, more angle. In addition, the movable block driven by the screw rod in the backrest pitching mechanism is also connected with the backrest bent plate assembly through the connecting rod, and compared with a mode that the movable block is directly connected with the backrest bent plate assembly, the stroke is larger, so that the pitching angle of the backrest support frame is larger, and the backrest pitching mechanism is more suitable for the motion track of the arc-shaped guide rail.

Drawings

Fig. 1 is a perspective view of a dental chair according to an embodiment of the present invention, wherein an angle between a backrest support frame and a floor is about 75 °.

Fig. 2 is a perspective view of a dental patient chair according to an embodiment of the present invention, wherein an angle between the backrest support frame and the ground is approximately 35 °.

Fig. 3 is a perspective view of a dental patient chair according to the present invention, wherein the angle between the backrest support frame and the ground is approximately 5 °.

Detailed Description

The following description of the embodiments of the present invention will be further described with reference to the accompanying drawings, wherein for the purpose of facilitating explanation, the upper, lower, left, right, front, rear, etc. orientations may be defined in the application, and the definitions are intended to facilitate clear description of the relative positions of the structures, and are not intended to limit the actual orientations of the products during the manufacturing, use, sale, etc. The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the dental patient chair provided in this embodiment includes a base 10, a chair lifting mechanism 20, a chair support 30, a backrest support 40, a backrest tilting mechanism, and a seat cushion tilting linkage mechanism. The seat support frame 30 is arranged on the base 10 in a lifting adjustable manner through the seat lifting mechanism 20, and the backrest support frame 40 is arranged on the seat support frame in a pitching adjustable manner through the backrest pitching mechanism; the cushion pitch interlock mechanism adjusts the angle of the seat support frame 30 in interlock with the back pitch mechanism when the back pitch mechanism adjusts the pitch of the back support frame 40.

The dental patient chair provided by the embodiment has a chair lifting adjusting function and a backrest pitching adjusting function, wherein the chair lifting mechanism 20 for executing the chair lifting adjusting function belongs to the prior art, and is not described herein again; the backrest pitch mechanism performing the backrest pitch adjustment function can adjust a larger pitch angle than the prior art, and will be described in detail below.

As shown in fig. 1, the backrest tilting mechanism includes a left side plate 511, a right side plate 512, a left arc-shaped guide rail 521, a right arc-shaped guide rail 522, a tilting drive assembly, and a backrest bending plate assembly; the pitching driving assembly specifically comprises a bracket 531, a motor 532, a screw rod 533, a movable block 534, a left connecting rod 5351 and a right connecting rod 5352; the backrest bending plate assembly specifically comprises a bending plate main body piece 541, a left arc-shaped sliding block 5421, a right arc-shaped sliding block 5422 and a connecting piece 543; the left-right orientation described in this embodiment is defined as the orientation of the patient sitting on the chair corresponding to the left or right hand.

The left and

right side plates

511 and 512 are disposed on the seat lifting mechanism 20 to be lifted and lowered in synchronization with each other at a left-right interval, the seat support frame 30 is supported on the left and

right side plates

511 and 512, and the left and

right arc rails

521 and 522 are disposed inside the left and

right side plates

511 and 512, respectively. The left side and the right side of one end of the backrest bent plate assembly are slidably arranged on the left arc-shaped guide rail 521 and the right arc-shaped guide rail 522, and the other end of the backrest bent plate assembly is connected with the backrest support frame 40; the pitch drive assembly is disposed below the seat support frame 30 and drives the backrest plate bending assembly to slide along the left arc-shaped rail 521 and the right arc-shaped rail 522.

Specifically, the bracket 531 of the pitch driving assembly is fixedly arranged below the seat support frame 30, the motor 532, the screw rod 533 and the movable block 534 are arranged on the bracket 531, and the motor 532 drives the movable block 534 to move back and forth on the bracket 531 through the screw rod 533; one end of each of the left link 5351 and the right link 5352 is connected to the movable block 534 via a first rotating shaft 561, and the other end thereof is connected to one end of the backrest plate bending assembly via a second rotating shaft 562. The left arc-shaped slider 5421 and the right arc-shaped slider 5422 of the backrest bending plate assembly are arranged on the left side and the right side of one end of the bending plate main body piece 541 and are respectively matched with the left arc-shaped guide rail 521 and the right arc-shaped guide rail 522, and the other ends of the left connecting rod 5351 and the right connecting rod 5352 are respectively connected with the left arc-shaped slider 5421 and the right arc-shaped slider 5422 through a second rotating shaft 562; the connecting piece 543 is disposed at the other end of the bending plate main body 541, and the backrest support frame 40 is connected to the connecting piece 543.

In the above backrest pitching mechanism, the movable block 534 driven by the lead screw 533 is connected with the backrest bending plate assembly through the connecting

rods

5351 and 5352, and compared with a mode that the movable block is directly connected with the backrest bending plate assembly, the stroke is larger, so that the pitching angle of the backrest support frame 40 is larger, and the backrest pitching mechanism is more suitable for the motion track of the arc-shaped guide rail. Referring to fig. 1-3, the angle between the back support 40 and the ground in fig. 1 is approximately 75 °, the angle between the back support 40 and the ground in fig. 2 is approximately 35 °, and the angle between the back support 40 and the ground in fig. 3 is approximately 5 °.

In addition, the dental patient chair according to the present embodiment adjusts the angle of the seat support frame 30 by interlocking the cushion tilt interlocking mechanism when the back tilt mechanism tilts the back support frame 40, which will be described in detail below.

The cushion pitch linkage mechanism comprises a left push-pull arm 611, a right push-pull arm 612, a linkage shaft 62, a left swing rod 631, a right swing rod 632, a left rotary support arm 641 and a right rotary support arm 642. One end of each of the left push-pull arm 611 and the right push-pull arm 612 is connected with the one end of the backrest bending plate assembly through the second rotating shaft 562, and the other end of each of the left push-pull arm 611 and the right push-pull arm 612 is connected with one end of each of the left swing rod 631 and the right swing rod 632 through the linkage shaft 62; the other ends of the left swing link 631 and the right swing link 632 are respectively connected with the front part of the seat support frame 30 through a third rotating shaft 563, a pivot is arranged between the one end and the other end of each of the left swing link 631 and the right swing link 632, and the pivots of each of the left swing link 631 and the right swing link 632 are respectively connected with the front parts of the left side plate 511 and the right side plate 512 through a fourth rotating shaft 564; the left and right sides of the rear portion of the seat support frame 30 are pivotally connected to the rear portions of the left and

right side plates

511, 512 via left and right pivot support

arms

641, 642, respectively.

The cushion pitching linkage mechanism can adjust the pitching angle of the cushion part in a linkage manner while adjusting the pitching angle of the backrest part, and can realize the adjustment of a larger angle of the whole seat by matching with the adjustment of the backrest part. Specifically, when the motor 532 drives the movable block 534 to move back and forth through the lead screw 533, the left connecting rod 5351 and the right connecting rod 5352 drive the backrest bending plate assembly to slide along the left arc-shaped guide rail 521 and the right arc-shaped guide rail 522, and the backrest bending plate assembly further drives the backrest support frame 40 to perform pitching movement; meanwhile, the left connecting rod 5351 and the right connecting rod 5352 can drive the left push-pull arm 611 and the right push-pull arm 612 to perform push-pull movement, the left push-pull arm 611 and the right push-pull arm 612 further drive the left swing rod 631 and the right swing rod 632 to swing around the fulcrum, and when the left swing rod 631 and the right swing rod 632 swing, the seat support frame 30 is driven to rotate by using the left rotary support arm 641 and the right rotary support arm 642 as the rotation fulcrum, so that the angle of the seat support frame 30 can be adjusted within a certain range. For example, fig. 2 and 3 are somewhat lower in the rearward adjustment of the seat support frame 30 than fig. 1.

The above embodiments are merely for full disclosure and not for limitation, and any replacement of equivalent technical features, which can be obtained without inventive work based on the gist of the present invention, should be construed as the scope of the present disclosure.

Claims

1. A dental patient chair comprises a base, a seat support frame, a backrest support frame and a backrest pitching mechanism, wherein the seat support frame is arranged on the base, the backrest support frame is connected to the seat support frame through the backrest pitching mechanism, and the backrest pitching mechanism drives the backrest support frame to perform pitching motion; the seat is characterized by further comprising a cushion pitching linkage mechanism and a seat lifting mechanism, wherein the seat supporting frame is arranged on the base through the seat lifting mechanism;

the backrest pitching mechanism comprises a left side plate, a right side plate, a left arc-shaped guide rail, a right arc-shaped guide rail, a pitching driving assembly and a backrest bent plate assembly; the left side plate and the right side plate are arranged on the seat lifting mechanism at a left-right interval and synchronously lifted, the seat supporting frame is supported on the left side plate and the right side plate, and the left arc-shaped guide rail and the right arc-shaped guide rail are respectively arranged on the inner sides of the left side plate and the right side plate; one end of the backrest bent plate assembly is slidably arranged on the left and right arc-shaped guide rails, and the other end of the backrest bent plate assembly is connected with the backrest support frame; the pitching driving assembly is arranged on the seat supporting frame and drives the backrest bent plate assembly to slide along the left arc-shaped guide rail and the right arc-shaped guide rail;

the pitching driving assembly comprises a bracket, a motor, a screw rod, a movable block and a connecting rod; the bracket is fixedly arranged below the seat supporting frame, the motor, the screw rod and the movable block are arranged on the bracket, and the motor drives the movable block to move back and forth through the screw rod; one end of the connecting rod is connected with the movable block through a first rotating shaft, and the other end of the connecting rod is connected with one end of the backrest bent plate assembly through a second rotating shaft;

the cushion pitching linkage mechanism comprises a left push-pull arm, a right push-pull arm, a linkage shaft, a left swing rod, a right swing rod and a left rotating support arm; one end of each of the left and right push-pull arms is connected with one end of the backrest bent plate assembly through the second rotating shaft, and the other end of each of the left and right push-pull arms is connected with one end of each of the left and right oscillating bars through the linkage shaft; the other ends of the left and right swing rods are respectively connected with the front part of the seat support frame through a third rotating shaft, a fulcrum is arranged between the one end and the other end of the left and right swing rods, and the fulcrums of the left and right swing rods are respectively connected with the front parts of the left and right side plates through a fourth rotating shaft; the left side and the right side of the rear part of the seat support frame are respectively and rotationally connected with the rear parts of the left side plate and the right side plate through the left rotating support arm and the right rotating support arm.

2. The dental patient chair of claim 1, wherein the back rest bending plate assembly comprises a bending plate main body, left and right arc-shaped sliding blocks and a connecting piece; the left and right arc-shaped sliding blocks are arranged on the left and right sides of one end of the bent plate main body part and are respectively matched with the left and right arc-shaped guide rails, the connecting piece is arranged at the other end of the bent plate main body part, and the backrest support frame is connected with the connecting piece.