JP2006122331A - Armrest for dental chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an armrest from hindering the introduction of a patient in the state of standing a backrest of a chair and to easily introduce a physically challenging patient, particularly a patient who can be in only a lying posture to a chair seat even in the state of laying the backrest of the chair. <P>SOLUTION: At the bearing parts of armrest support parts provided on both sides of the chair seat and having backward inclined parts, rotary shaft bars where armrest substrates are provided are pivoted rotatably so as to position the armrest in front of the backrest when used and to position it in rear of the backrest and in rear of the chair seat when it is retreated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an armrest of a dental chair for use in a dental clinic or the like.

  As shown in Patent Literature and FIG. 6, the conventional armrest of a dental chair is one that retracts the armrest by rotating the armrest rearward horizontally with the floor surface in order to introduce the patient into the chair seat.

  Although not shown in the drawings, there is also a chair that retracts the armrest by rotating the armrest of the chair upward.

JP 61-135660

  By the way, in the armrest of the above-mentioned conventional dental chair, since the rotation axis of the armrest is vertical, there are problems such as getting in the way when the patient is seated on the seat, and hooking clothes on the rotation shaft. .

Further, in the case where the backrest is wide with respect to the floor surface and the backrest is wide, the armrest cannot be positioned directly behind the backrest.
In addition, there is a problem that the backrest hits the armrest when sleeping on the backrest.

  In addition, when a disabled person, particularly a patient who can only take a sleeping position, is seated on a chair seat, there is a problem that even if the armrest is retracted backward, it becomes an obstacle and cannot cope with the patient as described above.

  The present invention is intended to solve the above-described problems, and the object of the present invention is to prevent the armrest from getting in the way when the patient is introduced with the chair backrested, and to lie down on the chair backrest. It is intended to provide a dental chair armrest that can be easily introduced into a chair seat without being disturbed by a disabled person, particularly a patient who can only take a sleeping position.

  The armrest in the dental chair of the present invention is intended to achieve the above object, and the means of claim 1 is provided on both sides of the chair seat, and has an armrest support portion having an inclined portion in the rear direction, and the armrest support portion. A bearing portion provided on one or both of the inclined portions, and a rotary shaft that is rotatably supported by the bearing portion, and the rotary shaft rod is provided on the armrest substrate, so that the armrest can be used. When the armrest is retracted, place it behind the backrest and behind the chair seat.

  According to a second aspect of the present invention, when the armrest is used, the armrest is locked by engaging a locking pin provided on the armrest rotating shaft rod with a locking groove provided on the armrest support portion. It was to so.

With the armrest in the dental chair of the present invention, the armrest does not get in the way when the patient is introduced with the chair backrested, and can easily be seated on the chair seat.
In addition, disabled persons, especially patients who can only sleep, can be easily laid on the chair seat while the chair is lying on the back of the chair. There is no multiplication.

  In the present invention, either or both of the armrests provided on the chair seat are provided with the axis of rotation of the armrest inclined backward, and when the armrest is used, the backrest is positioned forward, and when the armrest is retracted, the backrest and the chair seat are located behind By providing it so as to be able to rotate, the armrest can be kept out of the way even when the backrest is raised or laid down.

  Hereinafter, an embodiment of an armrest in a dental use chair according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing the use of the armrest with the backrest upright, FIG. 2 is a side view showing the state in which the armrest is retracted backward with the backrest upright, and FIG. 3 is a state with the backrest lying down. 4 is a side view showing a state in which the armrest is retracted rearward, FIG. 4 is an enlarged sectional view of the armrest portion when the armrest is used, FIG. 5 is an enlarged sectional view of the armrest portion when the armrest is retracted, and FIG. It is a side view which shows the armrest of a chair.

Reference numeral 1 denotes an armrest made of urethane or leather, 2 denotes an armrest substrate, and 3 denotes a rotating shaft rod attached to the armrest substrate.
Reference numeral 4 denotes a locking pin, 5 denotes an armrest support portion, 5a denotes an armrest support portion rearward inclined portion, 5b denotes a bearing portion, and 5c denotes a locking groove. A is a backrest and B is a chair seat part.

  An armrest support portion rearward inclined portion 5a of the armrest support portion 5 is inclined rearward, and a rotary shaft 3 provided substantially perpendicular to the armrest substrate 2 is provided on the armrest support portion 5 on the armrest support portion rearward inclined portion 5a. It is rotatably provided with respect to the provided bearing portion 5b.

  With the above configuration, when the armrest is used, as shown in FIG. 4, the locking pin 4 provided on the rotating shaft rod 3 is locked in the locking groove 5 c provided on the armrest support portion 5. .

  When the armrest is retracted, as shown in FIG. 5, the armrest 1 is lifted upward to remove the locking pin 4 of the rotary shaft 3 locked in the locking groove 5b of the armrest support 5 from the locking groove 6b. The armrest 1 can be retracted to the back of the backrest A by rotating to the back of the backrest A.

It is a side view which shows the time of armrest use in the state where the backrest stood upright. It is a side view which shows the state which retracted the armrest back in the state where the backrest stood upright. It is a side view which shows the state which retracted the armrest back in the state which laid the backrest. It is an expanded sectional view of the armrest part which shows the time of armrest use. It is an expanded sectional view of the armrest part which shows the time of armrest retreat. It is a side view which shows the armrest of the conventional dental chair.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Armrest 2 Armrest board | substrate 3 Rotating shaft rod 4 Locking pin 5 Armrest support part 5a Armrest support part back sloping part 5b Bearing part 5c Locking groove

Claims (2)

  Armrest support portions provided on both sides of the chair seat and having an inclined portion in the rearward direction, bearing portions provided on the inclined portions of either or both of the armrest support portions, and pivotally supported by the bearing portions The rotary shaft rod is provided on the armrest substrate, and the rotary shaft rod is provided in front of the backrest when the armrest is used, and is positioned behind the backrest and chair seat when the armrest is retracted. Armrests in dental chairs. 2. The armrest is locked by using a locking pin provided on an armrest rotating shaft when engaged with a locking groove provided on an armrest support when the armrest is used. Armrest in the dental chair described.

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