JPS63130065A - Dental medical treatment chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dental treatment chair equipped with a chair back and chair legs that can be pivoted forward and backward of a chair seat, and particularly relates to a dental treatment chair that is equipped with a chair back that can pivot forward and backward of a chair seat, and a chair leg that can be rotated back and forth. This invention relates to a dental treatment chair that tilts a chair seat and raises and lowers chair legs in conjunction with the movement of the patient.

(Prior art) Conventionally, in the raising and lowering (standing → tilting) motion of a dental treatment chair, a device that raises and lowers the chair seat to a height suitable for treatment, a device that raises and lowers the back of the chair, and a device that tilts the back of the chair have been used. There is a need for a tilt device that tilts the chair seat to keep the patient in a comfortable posture.

For this purpose, conventional dental treatment chairs are equipped with a vertical movement device, a tilt device, and a back plate undulation device that can be operated independently, and these can be selectively operated to position the operator in a posture suitable for treatment and to I try to keep it in a comfortable position.

(Problems to be Solved by the Invention) However, in order to smoothly perform the raising and lowering motion of the back of the chair, the raising and lowering motion of the chair legs, and the vertical tilting motion of the chair seat legs, the above-mentioned various methods are necessary. Incorporating these electromechanical devices independently not only complicates the structure of the treatment chair but also increases manufacturing costs, which is an obstacle to providing a convenient treatment chair.

In addition, in order to obtain a comfortable posture for the patient, there is a fee to keep the patient's nose level and the height of the knees level. Must be combed. However, operating the various devices independently requires raising and lowering the back of the chair, tilting the chair seat,
This not only makes it difficult to raise and lower the chair legs smoothly, but also temporarily disturbs the patient's comfortable posture.

(Means for solving the problems) The present invention has been made in view of the above problems, and
In conjunction with the raising and lowering motion of the chair back 2, the chill 1 motion of the chair seat 1 and the raising and lowering motion of the chair legs 3 are smoothly performed. In a dental treatment chair, a back part 2 and a chair leg part 3 are provided at the front and back positions of a chair seat part 1, and the chair back part ff1S2 is configured to be able to rise and fall freely by the operation of a driving source 4'. The base of the chair back 2 at the lower part slightly away from the axis 2a'
The chair back part 2 is constructed by providing a long rod 2e with one end pivotally connected to the fourth part and the other end pivotally connected near the base of the chair leg part 3.
1/(2) A dental treatment chair in which the chair legs 3 are raised and lowered in conjunction with the ups and downs of the chair; In a dental treatment chair that is equipped with chair legs 3 and in which the chair back 2 can be raised and lowered by actuation of a drive source 4', the lower part of the chair back 2 is slightly separated from the chair back pivot axis 2a. A tilt rod 2f with one end pivotally connected to the base end of the chair back 2, a crank 2g with one end pivotally connected to the intermediate part of the chair lift s4, and a link 2h with one end pivotally connected to the front lower frame of the chair seat 1. The other end of the tilt rod 2f and the other end of the crank 2g are pivotally supported, and the other end of the link 2h is pivotally supported in the middle of the crank 2g. This dental treatment chair is characterized in that the front of the chair seat tilts in conjunction with the ups and downs of the chair.

The dental treatment chair of the present invention will be explained below with reference to FIGS. 1 to 3.

In the dental treatment chair of the present invention, the chair back 2 is provided with a long rod turning sleeve 2b and the chair leg 3 is provided with a long rod connecting shaft 3g, so that the turning movement of the chair back turning shaft 2a is controlled by the seat. The chair leg 3 is raised and lowered by converting it into a turning motion of the chair leg 3 via the long rod 2e that moves in the direction of the hand Jj.

The long rod 2e includes a cylinder part 6 and a rod part 7 that slides inside the cylinder part 6 in the middle thereof, and even if the operator's foot or the like gets caught in the middle of the raising and lowering of the chair leg part 3, the rod part Part 7 extends and comes off to ensure patient safety. In addition, by tensioning the tension spring 5 between the cylinder portion 6 and the rod portion 7 of the long rod 2e, the rod 12 is expanded to ensure the safety of the patient, and when the operator's foot or the like is removed, the tension spring 5 can be stretched. Due to the restoring force of the tension spring 5, the chair leg 3 is subsequently returned to the upright/lowering state, and the chair leg 3 is placed in a jointed state, and the chair leg 3 can be stably held.

The dental treatment chair of the present invention is chair 8! The back side of part 1 is pivoted to the lifting part pivot shaft 4a on the chair lifting part 4, and the leg side is pivoted to the chair seat part turning axis 1a via the crank 2g and link 2h of the chair lifting part 4, and The crank 2g is pivotally supported on a tilt rod 2c via a tilt rod 2f that moves in the longitudinal direction of the seat, and when the chair back 2 is turned up and down (standing up → tilting), the tilt Rod 2f
The crank 2j is rotated through the link 21+, and the chair seat is rotated by the link 21+.
Instead of moving the chair seat 81S1 in an arc with center a, the leg side of the chair seat 1 is tilted up and down.

(Operation) The operation principle of the dental treatment chair of the present invention will be explained below with reference to FIG.

The up-and-down rotation movement of the chair back 2 centered around the chair back rotation axis 2a is converted into the rotation movement of the chair leg 3 centered around the chair leg rotation axis 1b via a long rod 2e that moves in the longitudinal direction of the seat. By this, the chair leg 3 can be turned up and down (vertical-horizontal).
can be done.

By providing a cylinder portion 6 and a rod portion 7 that slides inside the cylinder portion 6 in the middle of the long rod 2e, if the operator's foot or the like is caught in the middle of raising and lowering the chair leg portion 3, the rod portion 7 can be removed. can be extended to ensure patient safety. In addition, the long rod 2e
After the rod 12 is stretched by tensioning the tension spring 5 between the cylinder part 6 and the rod part 7 to ensure the safety of the operator, the restoring force of the tension spring 5 causes the chair leg to 3 can be raised and lowered to a vertical state, and the chair legs 3 can be stably held.

The crank 2 rotates around the crank rotation axis 4b of the chair lifting section 4 via the tilt rod 2f that moves the chair back 2 in the longitudinal direction of the seat.
Converting this turning movement to the turning movement of Fi, the turning movement of the crank 2g
The link 2h connecting the chair seat pivot shaft 1a with the chair leg pivot 11 fl 4 a converts the chair leg pivot 11 fl 4 a into an arcuate motion, thereby making it possible to tilt the leg side of the chair seat 1 up and down.

In this way, the dental treatment chair of the present invention costs only one shilling.
The raising and lowering of the chair back 2, the tilting of the chair seat 1, and the raising and lowering of the chair legs 3 can be carried out smoothly and reliably using only a drive source such as 4" and its mechanical transmission mechanism. Patients can also be made more comfortable during therapeutic procedures.

(Example) An example of the dental treatment chair of the present invention will be specifically described below based on the drawings.

Figure 1 ■ is an elevational view showing the dental treatment chair of the present invention in a tilted state, Figure 1 ■ is a plan view of Figure 1 ■, and Figure 2 shows the dental treatment chair of the present invention in a state in the middle of being tilted. Elevation view, Figure 3 ■ is an elevation view showing the dental treatment chair of the present invention in an upright state, Figure 3 ■ is a side view of Figure 3 ■, and Figure 4 is a sectional view showing the configuration of the long rod. , FIG. 5 is a principle diagram illustrating the tilt mechanism of the 碕Tp@ section.

In the figure, the dental treatment chair includes a chair seat part 1 which is pivoted freely around a chair lift pivot shaft 4a at the upper end of the chair lift part 4 of the base, and a chair back pivot shaft immediately behind the chair seat part 1. 2
The frame consists of a skeleton part with the chair back part 2 and the chair leg parts 3 pivoted on the chair back part 2 and the chair leg part pivot axis 1b, respectively, and the periphery of the skeleton part is made up of suitable materials such as shims, nihons, covers, etc. There is.

In FIGS. 1 to 3, the dental treatment chair of the present invention is
An elongated rod pivot shaft 2b disposed at the rear of the lower part of the chair back pivot shaft 2a, an elongated rod 2e pivotally supported by the elongated rod pivot shaft 2b and movable in the longitudinal direction of the seat, and the elongated rod. 2e, the chair leg pivots 1dllb to perform the movement movement in the longitudinal direction of the seat.
It is composed of a long rod connecting shaft 3g that converts the rotational undulation (vertical to horizontal) movement around .

The dental treatment chair of the present invention includes a driving sill -4° which is pivotally supported at the rear of the lower part of the chair back rotation shaft 2a of the chair back 2 and raises and lowers the chair back 2 (standing up → tilting), and the chair 11 part 2
a tilt rod rotation shaft 2c that converts the up-and-down movement of the chair back into an arcuate rotation movement centered on the chair back rotation axis 2a; and a crank rotation shaft 4b connected to the tilt rod rotation shaft 2c at the intermediate portion of the chair lifting section 4. a crank 2g pivoting on the crank 2g;
A link pivot shaft 4d is pivoted in the middle of g, and a link pivot shaft 4d is connected between the link pivot shaft 4d and the chair seat pivot shaft 18, so that the arcuate movement of the link pivot shaft 4d is centered around the chair lifting section pivot sleeve 4a. It is composed of a link 2h that converts the vertical movement into vertical movement.

Next, a mechanism for raising and lowering the chair leg portion 3 will be explained.

First, when the chair back 2 is raised and lowered (standing up and then tilted), the long rod rotation shaft 2b-he turns around the chair back rotation shaft 2a, and the long rod 2e, which is pivotally supported on the long rod rotation shaft 2b, is The long rod connecting shaft 3Fl, which is supported by the long rod 2e, is moved in the longitudinal direction, and the long rod connecting shaft 3Fl is changed into a rotational movement (vertical to horizontal) about the chair leg rotation axis 1b of the chair leg 3. The chair leg part 3 can be raised and lowered into a horizontal state.

In FIG. 4, by providing a cylinder portion 6 and a rod portion 7 that slides inside the cylinder portion 6 in the middle of the long rod 2e, even if the operator's foot or the like is caught while the chair leg portion 3 is being raised or lowered, The rod portion 7 can slide and expand to ensure patient safety. In addition, by tensioning the tension spring 5 between the cylinder portion 6 of the long rod 2e and the rod 37, the rod 37
After sliding and stretching to ensure the safety of the operator, the restoring force of the tension spring 5 continues to raise and lower the chair leg 3 (from horizontal to horizontal).
vertical) and then return to the vertical state and stably hold it.

Referring to FIG. 5, the tilt mechanism of the +tQ chair seat portion 1 will be described. When the eccentric shaft of the chair back 2 is expanded and contracted by a driving source such as Schilling-4' to raise and lower the chair back 2 (stand up → tilt), the tilt rod rotation sleeve 2c rotates around the chair back rotation axis 2a. , a crank 2g pivoted on the crank pivot shaft 4b of the chair elevating section 4, which moves the tilt lever 2r pivoted on the tilt lever pivot shaft 2c in the longitudinal direction of the seat;
Swirl.

Then, the link 2h that converts the turning movement of the crank 2g into a vertical movement movement converts the turning movement of the chair seat part 1 into a turning movement about the chair leg rotation axis 4a of the chair seat part 1.
The leg side of the can be tilted up and down.

At this time, the reduction relationship between the rotation angle (approximately π/2) of the chair back 2 and the up-and-down angle of the chair seat is as follows:
From the equivalent relationship expressed by the product of the turning angle and the turning radius of the crank turning shaft 4b and the V-chair elevator turning shaft 4a, the following is obtained.

(Turning radius of chair back 2) x (internal division point 4 of crank 2g)
d turning radius) / (crank 2g turning radius) 2X (M
(Turning radius of child seat part 1) In this way, the dental treatment chair of the present invention can raise and lower the chair back part 2 using only the driving force fj'J, such as one shilling-4', which raises and lowers the chair back part 2, and its mechanical transmission mechanism. 2 can be raised and lowered, and in conjunction therewith, the leg side of the chair seat part 1 can be tilted up and down, and the chair leg parts 3 can be raised and lowered.

(Effects of the Invention) As described in detail in the embodiments, the present invention includes a long rod pivot shaft disposed at the rear of the lower part of the chair back pivot shaft, and a long rod pivot shaft that is pivotally supported on the long rod pivot shaft. a long rod that moves in the direction; and a chair leg that is connected to the long rod and converts the movement movement in the longitudinal direction of the seat into a swinging and undulating movement (vertical to horizontal) centered on the chair leg rotation axis. By providing the long rod connecting shaft, it is possible to safely and reliably perform the raising and lowering motion of the chair back and the associated raising and lowering motion of the chair legs using only one driving source such as a Schilling and the long rod. .

In addition, a chair leg pivot axis that pivots on the back side of the chair seat;
a tilt rod that converts the up-and-down movement of the back of the chair into longitudinal movement of the seat; a crank that converts the movement of the tilt rod into vertical movement;
By providing a chair seat rotation axis that is connected to the link and converts the tilting movement of the chair seat, it is possible to convert the up-and-down movement of the chair back into a tilting movement of the chair seat. The dental treatment chair can be set smoothly and reliably using only the target transmitter hη.

[Brief explanation of the drawing]

Figure 1 ■ is an elevational view showing the dental treatment chair of the present invention in a tilted state, Figure 1 ■ is a plan view of tjS1 Figure ■, and Figure 2 is an elevation view showing the dental treatment chair of the present invention in a tilted state. Front view, tjL
Figure J3 ■ is an elevation view showing the dental treatment chair of the present invention in an upright state, Figure 3 ■ is a side view of Figure 3 ■, Figure 4 is a sectional view showing the configuration of the long rod, and Figure M5 is the chair. It is a principle diagram explaining the tilt mechanism of a seat part. 1...Chair seat, 1a...Chair seat rotation axis, 1b
...Chair leg pivot axis, 2...Chair back, 2a...
Chair back pivot axis, 2b...long rod pivot axis, 2c...
Tilt rod rotation axis, 2e... Long rod, 2f... Tilt rod, 2g... Crank, 2h... Link, 3...
Chair leg portion, 3g...Long rod connecting ring, 4...Chair lifting section, 4゛...Schilling-54a...Chair leg rotation axis, 4b...Crank rotation axis, 4C...・Crank connection shaft, 4d...Link rotation shaft, 5...Tension spring, 6.
...Cylinder part, 7...Rod part Patent applicant: Morita Tokyo Seisakusho Co., Ltd. Agent Patent attorney Mura 1) Yukio Figure 1■ Figure 3■ ■ Figure 5

Claims (4)

[Claims] (1) A dental clinic in which a seat back 2 and chair legs 3 are provided at the front and rear positions of a chair seat 1 pivotally mounted on a chair lifting section 4, and the chair back 2 is movable up and down by the operation of a drive source 4'. In a medical treatment chair, one end is pivotally attached to the proximal end of the chair back 2 at a lower part slightly away from the chair back pivot axis 2a, and the other end is pivoted near the base of the chair leg 3. A dental treatment chair characterized in that a long rod 2e is provided so that chair legs 3 are raised and lowered in conjunction with the ups and downs of a chair back 2. (2) A patent claim characterized in that the long rod 2e has a connecting portion consisting of a cylinder portion 6 and a rod portion 7 slidably fitted into the cylinder portion 6 in the middle thereof. A dental treatment chair according to scope 1. (3) A dental device according to claim 1 or 2, characterized in that the elongated rod 2e is formed by suspending a tension spring 5 between the cylinder portion 6 and the rod portion 7. treatment chair. (4) A dental clinic comprising a seat back 2 and chair legs 3 at the front and back positions of a chair seat 1 pivotally mounted on a chair elevating section 4, with the chair back 2 movable up and down by the operation of a drive source 4'. In a treatment chair for medical treatment, a tilt rod 2f has one end pivoted to the base end of the chair back 2 at a lower part slightly away from the chair back rotation axis 2a, and one end pivots to the middle part of the chair lifting section 4. A link 2h is provided with a crank 2g attached to the seat, and a link 2h whose one end is pivotally connected to the front lower frame of the chair seat 1, which pivotally supports the other end of the tilt rod 2f and the other end of the crank 2g. is provided with a tilt device configured by pivotally supporting the other end of the link 2h,
This dental treatment chair is characterized in that the front of the chair seat tilts in conjunction with the ups and downs of the chair back 2.