CN2040371U

CN2040371U - Electric dentist's chair

Info

Publication number: CN2040371U
Application number: CN 88208140
Authority: CN
Inventors: 刘玉树
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-05
Filing date: 1988-07-05
Publication date: 1989-07-05

Abstract

The utility model belongs to an electric dentist's chair. The lift mechanism of the chair is crossly connected with the internal and the external supporting frames, the ends of the two supporting frames are respectively hinged on an upper and a lower guiding rails, and the other ends respectively rotate along the upper and the lower guiding rails. The two supporting frames are also respectively provided with screw rods, screw caps, and motor pulley set. The screw cap drives the screw rod to extend or stretch to make the internal and the external supporting frames lifted or dropped. The pitching mechanism of the chair is composed of a lock rod, a lock piece, and a spring. The locking is achieved through the inclined position of the locking holes on the lock rod and the lock piece. When the backrest is needed to be adjusted, the lock piece is slightly pushed just using hands.

Description

Electric dentist's chair

This utility model belongs to a kind of electrically propelled chair that is used for dental examination, treatment.

Existing electric dental chair, realize that its elevating function mainly is that------screw---screw mandrel---steel wire rope, pulley spur belt train the employing motor, chair risen or descend, realize that its pitching is to adopt motor that---backrest that the stretching of belt train---screw---screw mandrel promotes chair is bowed or faced upward.Though the electric dental chair of said structure can be realized lifting, two functions of pitching, but that its structure seems is complicated, cost is high, particularly when lifting or pitching, transmission inadequately steadily and noise big, rope easy fracture, maintenance are inconvenient.

The purpose of this utility model is to design a kind of stable drive, the electric dental chair that noise is little, cost is low.

For solving above-mentioned task, this utility model has adopted following structure: it comprises elevating mechanism, luffing mechanism and back rest, seat frame, its elevating mechanism is to constitute like this, it has an inner support and a support arm, the place adopts hinge to connect in the middle of the both sides of two stands, the upper end of inner support has one to be connected with this, rolling bearing is equipped with at the two ends of axle, also be connected with screw mandrel on the axle, the rolling bearing of the upper end of inner support by axle head is along rotating in the upper rail groove, and the lower end of inner support is connected with an end hinge of a lower guideway groove; The upper end of support arm is connected with an end hinge of upper rail groove, and the last transverse plane of support arm also is connected with motor, belt train and screw, screw is connected with screw mandrel on the inner support, the lower end of support arm has one to be connected with this, rolling bearing is equipped with at the two ends of axle equally, the lower end of support arm is by bearing, and the bearing of the lower end of support arm by axle head is along rotating in the lower guideway groove.Its luffing mechanism is to constitute like this, and it has a locking bar, and a locking plate and an extension spring have locking hole on the locking plate, and locking bar one end is hinged on the back rest, and the other end passes locking hole, and locking plate is hinged on the seat frame.

For making luffing mechanism have reliable self-locking performance, this utility model is equipped with spring damping mechanism between back rest and seat frame, and this mechanism is connected in loop bar, the spring on the back rest by hinge and the spring stop piece that is fixedly connected on the seat frame constitutes.

Electric dental chair of the present utility model, simple in structure, transmission layout is reasonable, therefore, makes the lifting of whole dental chair, and stress is more reasonable, and the stability of whole chair also increases, thereby has reduced noise.Owing to adopt silent ratchet, therefore, regulate easy to usely, in 0 °～90 ° scopes, can realize the angle of step-less adjustment pitching.In addition, this chair has reduced more than 70% than the above lifting driving power of 400W of existing dental chair.Whole chair cost reduces by 40% than existing.This chair is mainly used in dental treatment or inspection, also can be used for teaching or repacks the beauty treatment chair into.

The embodiment that now provides in conjunction with the accompanying drawings is further described this utility model.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 1.

With reference to Fig. 1, when moving behind the handgrip (7) on the locking plate (5), locking plate turns to dotted line position among the figure (vertical position), regulate back rest (1) to needed position, locking bar (4) just does reciprocating linear motion along locking hole, when unclamping handgrip, locking plate just returns to solid line position among the figure (obliquity) under the pulling force of hanging spring (13), locking bar relies on the obliquity of locking hole, reaches locking with friction, finishes the pitching of backrest.With reference to Fig. 2, when locking bar and locking plate make back rest finish pitching, the loop bar (20) that is hinged on the back rest other end is also reciprocating along the hole that is welded on the seat frame (2) simultaneously, and the spring on the compression loop bar (3), thereby make back rest can finish pitching reposefully, and when in a single day handgrip (7) is not intended to collide, backrest is unlikely to unexpected pitching, realizes the damping self-locking.

With reference to Fig. 1,2, motor, belt train (8) is contained in the upper surface of support arm (11)---on the flat board, screw (9) is coaxial with belt pulley, screw mandrel (14) one ends are connected on the axle (19) by cover, the other end is connected with screw, inner support (10) is the soldering group component with support arm (11), identical two rolling bearings (17) are equipped with at the two ends of the axle (18) on the axle on the inner support (19) and the support arm respectively, upper rail groove (15) and lower guideway groove (12) all adopt channel-section steel and base plate welding to constitute, the inner support lower end is hinged on the base plate of lower guideway groove, and the upper end of support arm is hinged on the base plate of upper rail groove.The both sides of upper and lower guide-track groove are equipped with the guard shield (16) that gum elastic is made respectively, and seat frame adopts to prop up with the upper rail groove and fixedly is connected.Drive screw (9) by motor, belt train (8), thereby make screw mandrel (14) elongation or flexible, bearing (17) rotates along upper and lower guide-track groove, and the support arm lifting is finished the lifting of whole dental chair with this.

Claims

1, a kind of elevating mechanism that comprises, luffing mechanism, seat frame, the electric dental chair of back rest is characterized in that:

A, said elevating mechanism has inner support (10) and support arm (11), the place connects with hinge in the middle of the both sides of two stands, the upper end of inner support is connected with axle (19) and also rotates along a upper rail groove (15) is interior by the rolling bearing (17) at axle two ends, also be fixed with screw mandrel (14) on the axle (19), the lower end of inner support is hinged with an end of guide-track groove (12) once, the rolling bearing (17) that the lower end of support arm is connected with axle (18) and passes through the axle two ends is along rotating in the lower guideway groove (12), and the upper end of support arm is hinged on upper rail groove (15) and goes up and motor, belt train (8) and screw (9) are connected on the upper surface of support arm;

B, said luffing mechanism have on locking bar (4) and locking plate (5), extension spring (13) and the locking plate locking hole are arranged, and an end of locking plate and locking bar is hinged on respectively on seat frame (2) and the back rest (1).

2, according to the described electric dental chair of claim 1, it is characterized in that also being equipped with between back rest and the seat frame spring damping mechanism, said damping mechanism is by the loop bar (20) and the damping spring (3) that are hinged on the back rest, and the spring stop piece (6) that is fixedly connected on the seat frame is formed.

3,, it is characterized in that being equipped with between upper rail groove and the lower guideway groove outer housing made from elastomeric material (16) according to the described electric dental chair of claim 1.