CN106264962A

CN106264962A - Dental patients chair

Info

Publication number: CN106264962A
Application number: CN201610464627.1A
Authority: CN
Inventors: G·马蒂乌佐
Original assignee: Cefla SCARL
Current assignee: Cefla SCARL
Priority date: 2015-06-23
Filing date: 2016-06-23
Publication date: 2017-01-04
Anticipated expiration: 2036-06-23
Also published as: EP3108867B1; EP3108867A1; CN106264962B

Abstract

The present invention relates to dental patients chair.Mechanism for the mobile chair of swaying (1) being preferably dental patients chair includes backrest (2) and seat (3) being moved relative to, wherein backrest is supported by swing mechanism, mechanism for mobile chair (1) of swaying farther includes: have at least one cam (14) of curved profile set in advance, cam support seat and the axis oscillating at least about the axis of oscillation corresponding essentially to seat；At least one bracket or slider (12)；At least one pilot hole or groove (11) for bracket (12).Pilot hole or groove (11) substantially upwardly extend in the side of the profile of cam, and bracket has the cooperation device that the profile with cam cooperates；During bracket is activated in a sliding manner by the swing mechanism of backrest, when bracket slides in pilot hole or groove due to actuating system, the swing controlled by the profile of cam itself is at least ordered to be moved with the bracket of the profiled interference of cam.

Description

Dental patients chair

Technical field

The present invention relates to the technical field of dental patients chair.More particularly it relates to via utilizing cam and circle The mechanism in shape hole allows equipment and the method for mobile described chair, and bracket slides in described circular port, and bracket activates described Cam.

Background technology

In dentistry history, at least up to nineteen sixty, dentist stands work in the past, now dentist's sedentary.Dentistry Unit manufacturer strives providing dental treatment unit, it is allowed to dentist works in the way of meeting human engineering, the most cosily work Make, and while dental treatment is provided, does not injure their musculoskeletal system.

Meanwhile, dental patients chair for patients must be comfortable: patient comfort can more loosen, and tooth Medical professionals is easier to.

And, it is however generally that, dental patients chair should allow to support patient and be in the so-called Trendelenburg position and put.Low If foot high position or shock resistance position are to be impacted or the necessary laying down position of patient during performing special examined.Suffer from Person lies on the back, lies low so that the head of s/he is less than knee and the pelvis of s/he of s/he.

The industry of dental patients chair manufactured more than 100 years；Patent about dental patients chair is: such as, Pelton US4173372 with EP0253943, Reynolds of EP0477762, Castellini of Crane.

Above-cited patent and other patents many describe the internal structure of chair, it is allowed to mobile chair itself.Thing In reality, usual dental patients chair allows wherein backrest to form the position (stand up position) of the angle relative to about 90 ° of floor, And allow wherein backrest to be parallel to the position (position of swaying) on floor, and all positions are between the two extreme position Centre.These chair position are obtained by various relative complex mechanisms and actuator.And, in order to revise backrest And the relative motion law between seat, the intervention of each several part changing or revising described mechanism is complicated and time-consuming, and this is Because people need access to and dismantle the considerable part of the joint motions chain between backrest and seat.

DE202011109649U discloses the chair of a kind of preamble according to claim 1.Disclosed treatment chair (1) seat surface (2), backrest (3), substrate (4) and the system of adjustment (7) are included.Described adjustment system includes taking the first guiding First guide rail (8) of the form of hole or groove, and include at least one second guide rail also taking the form of pilot hole or groove (9).Pilot pin (10) engages the first groove and the second groove.Described first groove (8) and described second groove (9) be arranged to each other it On so that between first terminal position (16) and the second terminal location (17) guiding bolt (10), adjust described adjustment system (7), time, described seat surface (2) is adjusted relative to described backrest (3).Described seat surface can not from guiding mechanism freely Raise, and do not allow by by described seat surface upward swings simply close to described mechanism.Otherwise, in order to take away Stating seat surface with permission close to described mechanism, described seat has to dismantle from described mechanism, or described mechanism has to Close from opposite side.

Summary of the invention

It is an object of the invention to provide a kind of permission and backrest is navigated to, from stand up position, position (vice versa) of swaying Mechanism, is effective and produces at a low price.And, described mechanism produces, with seat, the movement coordinated, and waves until arriving The tram meeting human engineering of patient；If if necessary, chair can be rocked to the Trendelenburg position and puts.

Another object is that with simple and that effective manner makes the geometry rule of this movement of operation change probability: change The geometry of cam, moves and itself can be accelerated or slow down, or modify according to expectation in a word.

Another object is that the specific position allowing to arrive patient, between the trunk and lower limb of patient, there is angle set in advance Degree.

It is an advantage of the invention that the invention reside in a kind of there is particularly simple structure, utilize the mechanism of single actuator, This mechanism need not special tool(s) and produces；Mould is dispensable, the part that the element constituted from metal sheet obtains Simple shaping be sufficient to.

In a preferred embodiment, simplifying the internal structure of an organization of the present invention utilizes the parts of minimal amount, and this number is reduced to six. Described parts are 2*2 same parts, are arranged in the position of symmetry, and parts the most to be produced are only three.As a comparison, The most known patient chair attached bag includes at least ten symmetrical parts, therefore has to produce with left and right pattern, the most to be produced Parts are at least 20.

By being provided about the cam swung transverse to the horizontal axis of chair longitudinal axis, and this cam does not couple Or locking onto the remainder (bracket specifically cooperated) of guiding mechanism, described seat can easily raise, swing mechanism Allow close to described mechanism, to be similar to vehicle cover in very simply and quickly mode.

Close to described guiding mechanism and only via axis of oscillation, described cam is connected to described mechanism and allows to be easy to Ground changes described cam, in order to change described tune when described backrest is displaced to obliquity (vice versa) from stand up position The geometry of whole system and the position of backrest are relative to the relation between the correspondence position at seat.

According to an embodiment, described cam cooperates with described bracket, by gravity make the surface of described cam against The cooperation device of described bracket.

Accompanying drawing explanation

The further advantage of the present invention and characteristic are open in the following description, wherein explain the present invention's based on accompanying drawing Illustrative embodiments:

Fig. 1 is in swaying the axonometric drawing of dental patients chair of position；

Fig. 2 is in the axonometric drawing of the dental patients chair of stand up position, and wherein interior trim is removed；

Fig. 3 is in swaying completely the axonometric drawing of dental patients chair of position (a low foot is high), and wherein interior trim is moved Remove；

Fig. 4 A is in the side view of the dental patients chair of stand up position；

Fig. 4 B is the side view according to Fig. 4 A, the most highlighted shows cam；

Fig. 5 A is in swaying the side view of one section of chair of position；

Fig. 5 B is the side view according to Fig. 5 A, the most highlighted shows cam；

Fig. 6 A is in the schematic diagram of the patient of iso weight location；

Fig. 6 B is in the schematic diagram of the patient of obliquity.

Reference numerals list

1, dental patients chair

2, backrest

3, seat

4, chair substrate

5, pantograph arm

6, interior trim support member

7, motor speed reducer

8, bow member

9, wheel

10, upper lift slab

11, hole or groove

12, bracket

13, axis

14, cam

Detailed description of the invention

Fig. 1 shows typical dentistry chair, and it includes backrest 2, seat 3, substrate 4 and pantograph arm 5.Pantograph arm 5 Allow the raising and lowering at seat 3, the height of 360mm to 840mm represent.The top of pantograph arm is certain capstan head, is used for Support the mechanism and the mechanism of with making coordinated seat movement making backrest sway.The chair 1 illustrated makes backrest sway, the most parallel In floor.

Fig. 2 shows the same chair 1 being in stand up position, and backrest 2 about becomes 70 ° relative to floor, and seat 3 12 ° are about become relative to floor.Interior trim removes from seat 3, allows the internal mechanism of mobile chair with display.

Fig. 3 shows the same chair swaying completely in the Trendelenburg position is put, and backrest 2 is nearly parallel to floor, and And seat 3 is positioned to the lower limb making patient and slightly rises relative to the head of patient.Interior trim removes from seat 3, allows to move with display The internal mechanism of dynamic chair.

In figs. 2 and 3, interior trim support member 6 and motor speed reducer 7 are obvious.

Fig. 4 A and Fig. 4 B shows one section of dentistry chair 1 of the same position being in Fig. 2, so that the operation of travel mechanism is more Clear.Fig. 4 A and Fig. 4 B shows the starting point of the movement causing making backrest 2 sway.

Driven motor decelerator 7, makes bow member 8 start to carry out in rotary moving along hole or groove 11 via bracket 12.Alternatively, Bracket can be made up of other sliding members (such as slider or like) guided along groove 11.Via lateral shaft Integral with described bow member 8, that wheel 9 joint is present in lift slab 10 cam 14, the fulcrum of upper lift slab 10 is positioned on axis 13, Start vertically to rise, thus sliding seats support member 6.It is noted that two cams 14 are arranged on and support against anticline and lean on machine The outside of the frame element of structure, and each cam is all simply plugged in support shaft with supported hole, and this support shaft is fixing Motionless and integral with described frame element, it is actually fulcrum axis 13.This structure ensure that the simplest and straight Ground connection is close to cam 14, and makes its rapid replacing be possibly realized.

Other substitutes the cam 14 that can realize having two parts, and support frame stabilizes it fulcrum and is positioned at axis 13 On, and it is releasably secured to this support frame according to the part at characteristics of motion support profiles edge.With this Mode, the characteristics of motion can be modified the most simply, it may be assumed that change outline portion, such as dismounting seat and Manual lifting cam 14, in order to attempt moveable outline portion is fixed to steady component.

By this way, not only it is easily adjusted, and easily carries out possible maintenance and finishing.

Fig. 5 A and Fig. 5 B shows one section of dentistry chair 1 of the same position being in Fig. 3.Fig. 5 A and Fig. 5 B shows now Being in the movement of the wheel 9 of its end-of-travel position, the seat support 6 then resulting in support interior trim rises.

It is evident that the dynamic law that the extension of angle of elevation and rising are occurred depends on being present in lift slab 10 The geometry of the cam 14 of downside.Along with cam radius and the change of center (if being circular cam), the rising at seat The speed that the width of angle and rising are occurred can change.It is (ellipse, parabola, double that design has different geometries Curve) cam, acceleration and the ascending fashion of backrest are changed.

In the embodiment being shown here at, the movement at backrest 2 and seat 3 occurs in a coordinated fashion so that work as backrest During decline, the angle between trunk and the lower limb of patient is gradually increased, and about increases to 180 ° from 95 °.

In (unshowned) alternate embodiments, the design of cam has geometry, such as by the spy of backrest Location is put the certain tilt with seat and is linked up, and causes the probability arriving patient position, wherein:

-generally, the trunk of patient becomes 25 ° relative to floor, and the thigh of patient is perpendicular to floor, and s/he Femoral head is parallel to floor；Angle between trunk and the thigh of patient is 130 °.In this position, the weight of patient is equably Distribution (iso weight, the most comfortable position)；The position of patient is shown schematically in Fig. 6 A.

The trunk of-patient is in optimum position for dentist, and seat keeps relative angle to be stable relative to backrest 's.Angle between trunk and the thigh of patient is about 105-120 ° (obliquity)；The position of patient is shown schematically in In Fig. 6 B.

In other words, the angle between trunk and the thigh of patient may remain in the range of 95-130 °, but patient is Swaying, the height of the head of s/he is suitable for dentist's work.This position is as snug as a bug in a rug for patients, can divide equably The weight of cloth s/he, meanwhile meets human engineering for dentist.

In another unshowned embodiment, cam can be designed so that patient is carried by the terminal of position of swaying completely To perfectly level in the position of floor (patient table).

According to all above contents, it is understood that according in the chair of the present invention, move backrest and movement Relation between seat affects the shape of cam contour with almost intuition and direct mode, and therefore the coordination at backrest and seat moves Dynamic is designed as relatively direct operation.

Claims

1. for a mechanism for mobile chair (1) of swaying, described in chair of swaying be preferably dental patients chair, described for moving The mechanism of dynamic chair (1) of swaying includes backrest (2) and seat (3) being moved relative to, and wherein said backrest is by putting Dynamic mechanism supports, the described mechanism for mobile chair (1) of swaying farther includes:

-there is at least one cam (14) of curved profile set in advance, seat described in described cam support and at least enclosing Axis oscillating around the axis of oscillation corresponding essentially to described seat；

-at least one bracket or slider (12)；

-at least one pilot hole of described bracket (12) or groove (11)；

It is characterized in that,

Described pilot hole or groove (11) substantially upwardly extend in the side of the profile of described cam,

Described bracket (12) has the cooperation device that the profile with described cam (14) cooperates；

During described bracket (12) is activated in a sliding manner by the described swing mechanism of described backrest, when described bracket (12) When sliding in described pilot hole or described groove (11) due to actuating system, with the described bracket of the profiled interference of cam (14) (12) swing controlled by the profile of described cam (14) itself is at least ordered to be moved；And

In the described cooperation device position in a distance of described cam (14) and described bracket (12), can be by swing The described cam carrying out freely shifting forms the position that wherein this cam and described cooperation device are interfered collaboratively.

Mechanism for mobile chair (1) of swaying the most according to claim 1, wherein, described cam (14), bracket (12) Can be produced with single pattern by stamped from sheetstock with described pilot hole or groove (11), and preferably install 2*2, or Person installs larger number as required.

Mechanism for mobile chair (1) of swaying the most according to claim 1, wherein, described cam (14), bracket (12) Can produce and install with single pattern with described pilot hole or groove (11), keep the particular wheel realized with left and right pattern Wide.

4., according to the mechanism for mobile chair (1) of swaying described in claims 1 to 3, wherein, described cam (14) has circle Arc, or oval, or parabola, or hyperbola, or linear profile, or aforesaid combination.

5. according to the mechanism for mobile chair (1) of swaying described in any one in aforementioned claim, wherein, described cam (14) include that there is convex surface and the interruption of concave surface or wavy profile so that patient is brought to wherein patient and is arranged essentially parallel to floor In the position of (low foot high), and then it is brought to wherein patient and makes the head of s/he be in the desired height of dentist of s/he Place but the trunk of patient form the position (position of maximal comfort of the angle being included between 105 ° to 130 ° relative to the thigh of s/he Put, obliquity) in.

6., according to the mechanism for mobile chair (1) of swaying described in claims 1 to 3, wherein, the shape of cam (14) allows Patient is taken in the position being completely parallel to floor, as taken on patient table.

7. according to the mechanism for mobile chair (1) of swaying described in any one in aforementioned claim, wherein, described actuating System choosing freely at least one motor speed reducer (7), hydraulic pressure and/or the pneumatic and/or group of manual system composition.

8., according to the one or more described mechanism for mobile chair (1) of swaying in aforementioned claim, its feature exists Be arranged on the outside of support central authorities capstan head in, described cam or two cams, each cam is positioned at central turn of described supports On the axis of oscillation of the corresponding side of tower, described axis is coaxially to each other.

9., according to the one or more described mechanism for mobile chair (1) of swaying in aforementioned claim, its feature exists In, described cam or multiple cam are made up of corresponding to the plate of the general planar of cam contour shape, and can support from chair The outside of mechanism is replaced with has other differently contoured cam, in order to the characteristics of motion between amendment backrest and seat.

10. one kind utilizes the chair of swaying (1) making preferably dental patients chair according to the mechanism described in claim 1 to 9 The method that backrest (2) and seat (3) are moved relative to, wherein, the probability of the motion at backrest and seat depends on cam (14) geometry.