JP6906224B2 - Dental treatment chair - Google Patents

Description

The present invention relates to a chair, and more particularly to a dental treatment chair with an armrest with a support arm.

Elderly people and patients with handicap often have weakened lower limb muscles, and in medical settings such as dentistry and ophthalmology, those that support the body around when changing posture while getting on and off the medical chair. Because there is no such thing, the number of accidents such as wobbling or falling is increasing.

For this reason, for example, Patent Document 1 provides a rotatable handrail member on one side of the dental treatment chair in order to stably support the body when getting on and off the dental treatment chair. When the patient gets on and off the dental treatment chair, this handrail member is rotated near the patient, and after the patient sits on the dental treatment chair, the handrail member can be automatically rotated to a position away from the patient. A equipped dental treatment chair is disclosed.

Japanese Unexamined Patent Publication No. 2004-73418

In the dental treatment chair disclosed in Patent Document 1, the patient can stably support the body by holding the handrail member, but it is necessary to provide a support for supporting the handrail member separately from the dental treatment chair. Therefore, it was expensive and required a large installation space.

On the other hand, some dental treatment units do not have armrests on the right side or both sides, and may not be able to stand up by being held by the armrests when leaving.
In addition, in a dental treatment unit without armrests, it is difficult for the patient to get up when leaving, and it is not possible to put weight on the left elbow and maintain posture when gargling, so patients with handicap, of course. In general, elderly patients with weakened muscles may have difficulty maintaining a gargling posture or leaving on their own.

For this reason, it is desirable that the treatment chair be equipped with armrests, but even in a dental unit having armrests on the left and right, if the armrests fixed to the chair chassis (contour seat) do not move, standing medical treatment or semi-treatment By changing the angle of the backrest like horizontal medical treatment and horizontal medical treatment, not only the optimum position as the patient's armrest cannot be maintained, but also the tip of the armrest gets caught in the patient's clothes when leaving, and the clothes tear or fall. was there.

Therefore, an object of the present invention has been made in view of these circumstances, and the armrest supports the elbow of an elderly patient or a handicapped patient in an optimum position regardless of the angle of the backrest, and the patient. of the seating, armrest does not get in the way at the time of exit, Ru der to provide a dental treatment chair to hold the attitude caught in support arm provided in the armrest.

In order to solve the above problems, the invention of claim 1 provides a contour seat, a backrest, and an armrest that rotatably supports the patient's elbow within a predetermined angle range with respect to the backrest. a dental treatment chair wherein the armrest is seated patient is provided in parallel with the longitudinal direction of the armrest protrudes to the opposite side of the elbow receiving of the armrest, the support arm to hold the posture caught on departure A rotation lock mechanism that locks the flipped-up state of the armrest when the armrest is flipped up and rotated to a position substantially parallel to the backrest is a length of the armrest in the armrest. It is characterized by having a lock pin urged so as to advance and retreat in a direction intersecting the direction and a lock receiving seat provided on the backrest and engaged with the lock pin.

The invention of claim 2 is characterized in that, in addition to the configuration of the invention of claim 1, the tip portion of the lock pin is formed in a round shape .

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A third aspect of the present invention, in addition to the configuration of the invention according to claim 1 or claim 2, rotates the lock release mechanism for releasing the engagement between the lock pin and the lock receiving seat, provided in the backrest it is characterized in that there.

According to the present invention, when a patient with elderly patients or handicap is seated and Exit to dental treatment chair, and rotated to the backrest and substantially parallel position flipped up the armrest in a state that caused the backrest By locking it, the patient can grab the support arm of the armrest and sit or stand up, so that elderly patients and patients with handicap can be safely guided to the dental treatment chair, and accidents can occur. Can be prevented.

A perspective view of a dental treatment chair according to an example of the present invention when an armrest with a support arm is flipped up. A side view of the dental treatment chair shown in FIG. FIG. 5 is a side view of an armrest with a support arm when the armrest with a support arm is made parallel to the seating surface of the contour seat in the dental treatment chair according to an example of the present invention. An explanatory view of a rotation lock mechanism and a rotation lock release mechanism of an armrest with a support in a dental treatment chair according to an example of the present invention. Arrangement relationship diagram of definitive dental treatment chair lock receiving seat and the rotation lock release mechanism according to an embodiment of the present invention. The view which looked at the XX cross section of the dental treatment chair shown in FIG. 2 from above.

Hereinafter, a preferred embodiment of the dental treatment chair of the present invention will be described with reference to the drawings.
In the following description, it may be assumed that the configurations with the same reference numerals are the same in different drawings, and the description thereof may be omitted.
In the following description, a dental treatment chair will be described as an example, but the present invention is not limited to the dental treatment chair, and can be applied to chairs for other purposes.

FIG. 1 is a perspective view of a dental treatment chair according to an example of the present invention when an armrest with a support arm is flipped up, FIG. 2 is a side view thereof , and FIG. 3 is an example of the present invention. It is a side view when the armrest with a support arm is made parallel to the seating surface of a contour seat in the said dental treatment chair.
The dental treatment chair 1 includes a contour seat 2, a backrest 3, a headrest 4, a legrest 5, a footrest 6, a base 7, an armrest with a support arm (hereinafter, may be simply referred to as an “armrest”) 100, and an armrest. It has 200.
In the case of a dental treatment chair, a work table, a spiton, a shadowless lamp device, etc., which constitutes a dental treatment unit and is equipped with, for example, an air turbine, a micro engine, an ultrasonic scaler, a multi-syringe, etc., are not shown. It is installed around the dental treatment chair.

In the present embodiment, the armrest 100 with a support arm is provided so that its base 101 can rotate within a predetermined angle with respect to the backrest 3 via a rotation shaft 102.
Further, the armrest 200 is also provided with its base portion 201 rotatably with respect to the backrest 3 via the rotation shaft 202.
The armrest 100 with a support arm and the armrest 200 may be provided on the left and right sides of the dental treatment chair 1.

Further, the armrest 100 with the support arm and the armrest 200 are configured to be able to maintain a horizontal position substantially parallel to the seating surface of the contour seat 2 in the initial state.
The base 201 of the armrest 200 is connected to a part of a link mechanism (not shown) provided in the contour seat 2 via a link column 204 rotatably provided on the armrest 200, and the rotation shaft 202 of the armrest 200 is also connected. It is connected to a part of a link mechanism (not shown) provided on the backrest 3.
The armrest 200 is configured to maintain a horizontal position substantially parallel to the seating surface of the contour seat 2 by this link mechanism even when the backrest 3 is tilted.

Similarly, the armrest 100 with a support arm is also configured to be interlocked with the armrest 200 by an interlocking mechanism (not shown) and to maintain a horizontal position when the backrest 3 is tilted.
Further, the armrest 100 with a support arm is configured to be able to be flipped up as described later from a state maintained in a horizontal state.
In this way, the armrests 100 and 200 are configured to automatically maintain the horizontal position when the backrest 3 is tilted, so that the patient can hold the elbow in the optimum position regardless of the angle of the backrest. Can be applied.
Further, the armrests 100 and 200 are provided with cushioning elbow receiving portions 103 and 203 at their bases 101 and 201, respectively.

On the base 101 of the armrest 100 with a support arm, the U-shaped support arm 40 is parallel to the longitudinal direction of the armrest 100 so that the patient projects to the opposite side of the armrest 103 on which the patient rests. It is provided.
In the position of the armrest 100 with the support arm shown in FIG. 3, since the armrest 100 is in the horizontal position, the support arm 40 is located below the armrest 100, and the support arm 40 does not interfere with the patient's medical treatment. ..
Further, the dental treatment chair 1 shown in FIGS. 1 and 2 shows a position when sitting or leaving, and the armrest 100 with a support arm is in a flipped-up state.
In this state, it is desirable that the armrest 100 with the support arm is non-rotatably locked with respect to the backrest 3.

In consideration of hygiene, the outer periphery of the support arm 40 can be provided with a sterilizable material, for example, a split cylinder member made of silicon resin, or a coating made of an antibacterial material.
Further, the shape of the support arm 40 is not limited to the U-shape, but has a portion that can be grasped by the patient, such as a π-shape or an L-shape, and the armrest 100 base 101 has an elbow receiving portion 103. As long as it can be projected and fixed from the opposite side of the above, it may have another shape, and may be composed of a single member or a plurality of members.
Further, the support arm 40 may be attached to the side surface of the base portion 101 of the armrest 100 so as to protrude from the base portion 101 on the opposite side of the elbow receiving portion 103.

When the patient sits on the dental treatment chair 1, the backrest 3 is raised and the armrest 100 is flipped up so that the armrest 100 does not interfere with the sitting.
This allows the patient to sit safely by grabbing the support arm 40.
The rotation lock mechanism for preventing the armrest 100 from rotating with respect to the rotation shaft 102 will be described later.

After the patient sits on the dental treatment chair 1, the rotation lock mechanism of the armrest 100 is released, and the armrest 100 that has been flipped up is placed in a horizontal position substantially parallel to the seating surface of the contour seat 2, that is, in the initial state. Return to.
The configuration for releasing the rotation lock mechanism of the armrest 100 will be described later.
Further, the headrest 4 is moved up and down to fit the headrest 4 to the patient's head, and then the entire dental treatment chair 1 is raised, or the backrest 3 of the dental treatment chair 1 is laid down at an arbitrary position, and the contour seat is used. By tilting 2, the patient is moved to a position where it is easy to treat.

Next, the rotation lock mechanism and the rotation lock release mechanism of the armrest 100 will be described.
FIG. 4 is a diagram for explaining a rotation lock mechanism and a rotation lock release mechanism of an armrest with a support arm in a dental treatment chair according to an example of the present invention.
FIG. 4A shows a state in which the armrest 100 with a support arm is non-rotatably locked with respect to the backrest 3, and FIG. 4B shows an unlocking operation of the armrest 100 with a support arm. It shows the state of the armrest.
Further, FIG. 5, in the dental treatment chair according to an embodiment of the present invention, a view showing the arrangement of the locking seat and the rotation lock release mechanism, Figure 6, in dental treatment chair according to an embodiment of the present invention, It is a figure which looked at the XX cross section of the chair shown in FIG. 2 from above.

In the present embodiment, the rotation lock mechanism of the armrest 100 with a support arm includes a lock pin 10 provided on the base 101 of the armrest 100 with a support arm, and a lock receiving seat 20 provided on the backrest 3.
As shown in FIG. 4A, the lock pin 10 has a shaft portion 11, a tip portion 12, and a flange portion 13 provided between the shaft portion 11 and the tip portion 12.

The base 101 of the armrest 100 is provided with an opening 110 that opens on the backrest 3 side in a direction orthogonal to the longitudinal direction of the armrest 100 and a sliding hole 111 that communicates with the opening 110.
The lock pin 10 is arranged in the opening 110 so that the flange portion 13 is located in the opening 110 and one end of the lock pin 10 on the opposite side to the tip portion 12 is located in the sliding hole 111.
A spring member 14 is arranged between the bottom of the opening 110 and the flange 13 of the lock pin 10, and the lock pin 10 is urged toward the opening side of the opening 110, that is, in the direction of the backrest 3. There is.

The opening side of the opening 110 is threaded and closed by a screw member 15 having a hole through which the tip 12 of the lock pin 10 can be inserted.
Therefore, the lock pin 10 is held in the armrest 100 so as to be able to move forward and backward in the direction intersecting the longitudinal direction of the armrest 100, and is always attached by the spring member 14 in the direction in which the tip portion 12 protrudes from the base portion 101 with an appropriate force. It is being pushed.
The tip portion 12 of the lock pin 10 can project toward the backrest 3 until the flange portion 13 comes into contact with the screw member 15.

The rotation shaft 102 of the armrest 100 is rotatably supported by a bearing portion 120 provided in the backrest 3.
The rotating shaft 102 protrudes from a through hole 302 provided in the frame 300 on the side surface of the backrest 3, and the base 101 of the armrest 100 is fixed to the tip of the rotating shaft 102.
The frame 300 of the backrest 3 is provided with a disk-shaped lock receiving seat 20 having a through hole 21 through which the rotating shaft 102 can be inserted on a shaft concentric with the rotating shaft 102 of the armrest 100.
Further, the lock receiving seat 20 is provided with an engaging hole 22 that engages with the tip portion 12 of the lock pin 10 when the armrest 100 is rotated to a position substantially parallel to the backrest 3.

When the armrest 100 is in the horizontal position shown in FIG. 3, as shown in FIG. 6, the lock pin 10 is urged toward the lock receiving seat 20 by the spring member 14, but the tip portion 12 of the lock pin 10 Is maintained in contact with the side surface S of the lock receiving seat 20.
Then, when the armrest 100 is flipped up and rotated to a position substantially parallel to the backrest 3, the lock pin 10 slides on the side surface S of the lock receiving seat 20 and enters the engaging hole 22 of the lock receiving seat 20. Engage.
The armrest 100, which was rotatable about the rotation shaft 102, is prevented from rotating by the engagement between the tip portion 12 of the lock pin 10 and the engagement hole 22 of the lock receiving seat 20.
The tip portion 12 of the lock pin 10 is formed with a rounded tip so as to smoothly engage with the engagement hole 22 of the lock receiving seat 20.

In order to return the armrest 100 from the flipped state to the horizontal state, it is necessary to disengage the tip portion 12 of the lock pin 10 and the engagement hole 22 of the lock receiving seat 20.
Therefore, in the present embodiment, as shown in FIGS. 4 and 5, a rotation unlocking mechanism including an unlocking button 31, an operation rod 32, a link member 35, and an unlocking pin 38 is provided.
The unlock button 31 is housed in a concave storage portion 301 formed in the frame 300 above the backrest 3, and one end of an operation rod 32 penetrating a through hole provided at the bottom of the storage portion 301 is formed. It is fixed to the unlock button 31.
A well-known means such as a screw can be used to fix the unlock button 31 and the operation rod 32.

A spring member 34 is arranged around the operation rod 32 between the unlock button 31 and the bottom surface of the storage portion 301, and the spring member 34 urges the unlock button 31 upward.
On the other hand, a flange portion 33 is provided in the middle portion of the operation rod 32, and when the flange portion 33 comes into contact with the frame 300 of the storage portion 301, the unlock button 31 and the operation rod 32 are released from the storage portion 301. Is being prevented.

The other end of the operating rod 32 is in contact with one side of the L-shaped link member 35.
The link member 35 is rotatably provided around the shaft member 36, and a split groove is provided at the tip of the other side of the link member 35 as shown in FIG. One end of the release pin 38 is pivotally supported by the pin 37.
A through hole 303 is provided on the side surface of the frame 300 at a position facing the engagement hole 22 of the lock receiving seat 20, and the other end of the lock release pin 38 is arranged so as to be located in the through hole 303.
It is preferable that the hole provided in the split groove for inserting the pin 37 is a long hole in order to move the unlock pin 38 smoothly.

In order to flip up the armrest 100 and return it from the locked state (the state shown in FIG. 2) to the horizontal state (the state shown in FIG. 3), rotate the armrest 100 toward the horizontal position while pressing the unlock button 31. It becomes possible by letting it.
When the unlock button 31 is pushed against the urging force of the spring member 34, the operation rod 32 is pushed down and the link member 35 is moved clockwise around the shaft member 36 as shown in FIG. 4 (B). Rotate.
As a result, the lock release pin 38 is pushed out to the armrest 100 side, that is, to the engagement hole 22 side of the lock receiving seat 20.
Then, the lock pin 10 located in the engaging hole 22 disengages from the engaging hole 22 against the urging force of the spring member 14.
In this state, the armrest 100 can be rotated toward the horizontal position.

In the above embodiment, the support arm 40 is provided on the right armrest 100, but the support arm 40 may be provided on the left armrest 200.
Further, as a locking mechanism of the armrest 100, the lock pin 10 and the lock receiving seat 20 are armrested in order to reduce the force acting on the lock pin 10 when the patient grips the support arm 40 of the armrest 100 and sits on or exits. It may be provided at a position far from the rotation shaft 102 of 100.

1 ... Dental treatment chair 2 ... Contour seat 3 ... Backrest 4 ... Headrest 5 ... Legrest 6 ... Footrest 7 ... Base 10 ... Lock pin 11 ...・ Shaft part 12 ・ ・ ・ Tip part 13 ・ ・ ・ Flange part 14 ・ ・ ・ Spring member 15 ・ ・ ・ Screw member 20 ・ ・ ・ Lock receiving seat 21 ・ ・ ・ Through hole 22 ・ ・ ・ Engagement hole 30 ・ ・・ Lock pin 31 ・ ・ ・ Unlock button 32 ・ ・ ・ Operation rod 33 ・ ・ ・ Flange 34 ・ ・ ・ Spring member 35 ・ ・ ・ Link member 36 ・ ・ ・ Shaft member 37 ・ ・ ・ Pin 38 ・ ・ ・ Lock Release pin 40 ・ ・ ・ Support arm 100 ・ ・ ・ Armrest 101 with support arm ・ ・ ・ Base 102 ・ ・ ・ Rotating shaft 103 ・ ・ ・ Elbow receiving part 110 ・ ・ ・ Opening 111 ・ ・ ・ Sliding hole 120 ・・ ・ Bearing part 200 ・ ・ ・ Armrest 201 ・ ・ ・ Base 202 ・ ・ ・ Rotating shaft 203 ・ ・ ・ Elbow receiving part 204 ・ ・ ・ Link support 300 ・ ・ ・ Frame 301 ・ ・ ・ Storage part 302 ・ ・ ・Through hole 303 ... Through hole

Claims (3)

A dental treatment chair equipped with a contour seat, a backrest, and an armrest that rotatably supports the patient's elbow within a predetermined angle range with respect to the backrest.
The armrest has a support arm that projects to the opposite side of the armrest's elbow receiving portion and is provided parallel to the longitudinal direction of the armrest to hold and hold the patient's posture when sitting or exiting.
A rotation lock mechanism that locks the flipped-up state of the armrest when the armrest is flipped up and rotated to a position substantially parallel to the backrest intersects the longitudinal direction of the armrest in the armrest. A dental treatment chair characterized by having a lock pin urged to move forward and backward in the direction of movement and a lock receiving seat provided on the backrest and engaged with the lock pin. The dental treatment chair according to claim 1, wherein the tip end portion of the lock pin is formed in a round shape. The lock pin and the rotating lock release mechanism for releasing the engagement between the lock receiving seat, dental chair according to claim 1 or claim 2, characterized in that provided in the backrest.

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