JP7576302B2 - Medical Chair - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applied. Released on November 4, 2020, through monitoring at the Hyogo Cancer Center.

The present invention relates to a medical chair.

Traditionally, hospitals have been equipped with medical chairs for performing hemodialysis, infusions, blood sampling, or similar treatments or procedures (hereinafter referred to as "hemodialysis, etc."). For example, Patent Document 1 proposes a blood sampling chair in which a blood sampling table on which the patient's arm can be placed is provided on a chair body consisting of legs, a seat, and a backrest.

The blood collection chair in Patent Document 1 is configured so that the blood collection table can be raised and lowered and the inclination angle can be changed by tightening or loosening multiple adjustment screws. This is to position the blood collection table itself high and adjust the inclination angle to be approximately horizontal when puncturing with a blood collection instrument such as a syringe, so that the arm of the patient can be positioned at a height that makes it easy for the practitioner to puncture the arm. Also, by having the patient place their arm on the blood collection table as parallel as possible to the ground and with their elbow slightly extended, the practitioner can safely puncture the arm.

On the other hand, it is recommended that the patient's arm be placed facing down during blood collection as a countermeasure against bacterial infection due to backflow from the blood collection device (recommended by the Japanese Committee for Clinical Laboratory Standards and the Standard Blood Collection Method Review Committee's "Standard Blood Collection Guidelines (GP4-A3)"). Therefore, the blood collection chair in Patent Document 1 is configured so that after puncturing, the practitioner can lower the position of the blood collection table itself and adjust the height again, and also so that the blood collection table can be tilted downward and forward. With this configuration, the patient can place their arm on the blood collection table even with their arm facing down.

In recent years, many medical chairs used for dialysis and the like have a reclining function on the backrest. Some of these chairs can also be used as a bed by reclining the backrest until it is almost horizontal. In particular, dialysis treatment requires patients to spend anywhere from 30 minutes to six hours in a chair depending on their symptoms, so many patients receive treatment with the backrest reclined, and in severe cases, in bed.

Registered Utility Model No. 3115129

These reclining medical chairs take up a lot of space in the hospital when in bed mode. For this reason, in hospitals, they are often placed side by side with the backrests upright and with no space between them to make the most efficient use of space.

As mentioned above, the practitioner must adjust the height and position of the blood collection table in the blood collection chair of Patent Document 1 or the armrest or armrest (hereinafter referred to as "armrest, etc.") in other medical chairs in order to adjust the position of the patient's arm before and after the puncture.

However, in actual medical settings, even when medical chairs that allow the height position of armrests, etc. to be adjusted are used, it has been found that the adjustment mechanism for the height position of armrests, etc. provided on such medical chairs is rarely used before and after puncture. Furthermore, in cases where the adjustment mechanism is not used and the height position of armrests, etc. is not adjusted before and after puncture, there are also cases where a stand (a stand on which the patient's arm is placed) such as an injection table or treatment table is used in addition to the medical chair, and the patient's arm is placed on this stand before the puncture is performed. The reasons for this practice are as follows.

For example, in Patent Document 1, the adjustment mechanism for changing the height position of the blood sampling table is composed of an adjustment screw etc. arranged from the side of the support pillar supporting the blood sampling table toward the outside (outside in the left-right direction of the patient seated on the seat). In such medical chairs, if the chairs are arranged side by side with no space between them, there is not enough space between the chairs, which causes the problem that the adjustment mechanism such as the adjustment screw is difficult to operate.

In addition, some commercially available products have an adjustment mechanism for adjusting the height position of armrests, etc., in which knobs or levers that play a role similar to the adjustment screws in Patent Document 1 are located behind the armrests, i.e., on the backrest side of the chair. In such medical chairs, if the chairs are placed side by side with no space between them, it is difficult for the practitioner to reach the knobs or levers on the backrest side from the front of the chair, making it difficult to adjust the height position of the armrests, etc.

Furthermore, for example, in the blood collection chair of Patent Document 1 and many commercially available products, the practitioner must temporarily place the puncture instrument held in his/her hand before and after puncturing before adjusting the height and position of the armrests, etc. In other words, the practitioner must temporarily place the puncture instrument before and after puncturing, and adjust the armrest itself with one hand while operating an adjustment screw, knob, lever, etc. with the other hand, and must adjust the height and position with both hands. Therefore, for practitioners who want to perform the puncture procedure quickly, adjusting the height and position of the armrests, etc., is an obstacle to a quick puncture procedure.

In addition, there are medical chairs on the market that can electrically raise and lower the armrests themselves, rather than manually adjusting the height and position of the armrests as in Patent Document 1. However, while such medical chairs that electrically raise and lower the armrests themselves can be operated with one hand, it takes time to raise and lower the armrests themselves, and they are not necessarily easy to use for practitioners who want to perform the puncture procedure quickly.

Therefore, there is a demand in the medical field for a medical chair with armrests that do not impede the rapid puncture procedure and that can be easily adjusted with one hand to the appropriate height for puncture, even when placed side by side with no space between them.

The present invention has been made to solve the problems of the conventional technology described above, and provides a medical chair with armrests that can be easily adjusted to a suitable height for puncturing with one hand, even when placed side by side with no gap between them, and that allow the practitioner to perform the puncturing procedure quickly.

The medical chair according to the present invention comprises a seat on which the patient sits, a backrest that supports the upper body of the patient, and an armrest on which the patient's arm is placed, and the armrest is characterized in that when the armrest is in a puncture position tilted at a predetermined angle around a rotation axis as a fulcrum, a puncture support surface on which the arm can be placed is formed on at least a part of the front side of the upper surface of the armrest when the armrest is raised from a normal position of approximately horizontal and in a puncture position.

The medical chair according to the present invention is characterized in that a normal support surface on which the arm can be placed is formed on the upper surface of the armrest portion in the normal position, and this normal support surface and the puncture support surface are connected.

The medical chair according to the present invention is characterized in that the normal placement surface is formed on the rear side of the upper surface of the armrest portion.

The medical chair according to the present invention is characterized in that the puncture support surface is recessed along the longitudinal direction of the armrest portion.

The medical chair according to the present invention is characterized in that the armrest portion can be locked at the puncture position, and an unlocking portion that releases the locked state of the armrest portion is provided near the tip portion.

The medical chair according to the present invention is characterized in that the lock release portion is provided on the underside of the armrest portion.

The medical chair according to the present invention is characterized in that the locking release section is operated to release the locked state at least when the armrest section is returned from the puncture position to the normal position.

The medical chair according to the present invention is characterized in that the armrest portion can be tilted from the normal position past the puncture position toward the backrest portion, and tilts without being locked when passing from the normal position to the puncture position.

The medical chair according to the present invention includes a seat on which the patient sits, a backrest that supports the patient's upper body, and an armrest on which the patient's arm is placed. When the armrest is lifted from its normal position of being substantially horizontal to a puncture position tilted at a predetermined angle with the rotation axis as a fulcrum, a puncture placement surface on which the patient's arm can be placed is formed on at least a part of the front side of the upper surface. That is, when the armrest is tilted on a normal chair, it is tilted to the upper surface, making it difficult for the patient to place his/her arm on it. In contrast, in the medical chair according to the present invention, the armrest is tilted to the puncture position, and the patient's elbow is extended by simply placing the arm on the puncture placement surface formed on the front side of the upper surface, allowing the practitioner to perform the puncture procedure quickly. In addition, even when the armrest is tilted at the puncture position, the patient can stably place his/her arm on the puncture placement surface. Furthermore, even if the medical chairs are placed side by side with no space between them, the practitioner can easily adjust the inclination angle of the armrests by simply lifting the tip of the chair with one hand from the front.

In addition, with the medical chair of the present invention, adjustment to a height suitable for puncture can be performed simply by lifting the tip and tilting the armrest, rather than by raising or lowering the armrest itself. Therefore, the practitioner can easily adjust to a height suitable for puncture with one hand. In addition, the practitioner does not need to temporarily put down the puncture instrument he is holding in his hand, and can perform the puncture procedure quickly.

In the medical chair according to the present invention, a normal placement surface on which the arm can be placed is formed on the upper surface of the armrest in the normal position, and this normal placement surface and the puncture placement surface are connected. That is, in the medical chair according to the present invention, even when the armrest is in the normal position in a substantially horizontal state, the patient can stably place his/her arm on the normal placement surface. In addition, since the normal placement surface and the puncture placement surface are connected, the patient can smoothly move his/her arm between the normal placement surface and the puncture placement surface when the armrest is adjusted from the normal position to the puncture position or from the puncture position to the normal position. Therefore, even when the arm is placed on the upper surface of the armrest, the practitioner can adjust the inclination angle of the armrest before and after puncture without putting a burden on the patient.

In the medical chair according to the present invention, a normal placement surface is formed on the rear side of the upper surface of the armrest section. That is, in the medical chair according to the present invention, with the armrest section in the normal position, the patient can place his/her arm on the normal placement surface with his/her elbow bent. On the other hand, with the armrest section in the puncture position, the puncture placement surface is higher than the normal placement surface, so that the patient's arm placed on the puncture placement surface is placed at a higher position than when placed on the normal placement surface. Therefore, the patient's elbow is naturally extended and the arm is positioned in a suitable position for puncture, making it easier for the practitioner to perform the puncture procedure and allowing the procedure to be performed quickly.

The medical chair according to the present invention has a puncture support surface that is recessed along the longitudinal direction of the armrest section. In other words, with the medical chair according to the present invention, the patient can place their arm in a roughly eaves-gutter-shaped recess in the puncture support surface on the upper surface of the armrest section at the puncture position, allowing them to place their arm more stably.

In the medical chair according to the present invention, the armrest portion can be locked at the puncture position, and an unlocking portion that unlocks the armrest portion is provided near the tip. That is, in the medical chair according to the present invention, even when the armrests are placed side by side with no space between them, the armrest portion can be easily locked at the puncture position with one hand from the front of the chair. In addition, the practitioner can operate the unlocking portion provided near the tip while supporting the tip with one hand from the front of the chair. Therefore, in the medical chair according to the present invention, the practitioner can easily lock and unlock the armrest portion with one hand at the puncture position.

The medical chair according to the present invention has an unlocking section provided on the underside of the armrest. In other words, the medical chair according to the present invention prevents the patient from accidentally touching the unlocking section and accidentally unlocking the armrest. Furthermore, the unlocking section is easy to operate even when the practitioner is supporting the tip with one hand.

In the medical chair according to the present invention, when the armrest is returned from at least the puncture position to the normal position, the lock release unit is operated to release the locked state. In other words, in the medical chair according to the present invention, the armrest, which is in the puncture position, is not accidentally released from the locked state, and the patient can stably place his/her arm on the puncture support surface.

In the medical chair according to the present invention, the armrest can be tilted from the normal position past the puncture position toward the backrest, and when passing the puncture position from the normal position, it tilts without being locked. That is, in the medical chair according to the present invention, the armrest can be tilted smoothly when tilting from the normal position past the puncture position toward the backrest. Therefore, for example, the armrest can be easily tilted to a position along the backrest so that a patient who needs to slide sideways from a wheelchair or the like can easily sit down. Also, even in a medical chair in which the backrest is reclined to be in a bed state, the armrest can be tilted to a position along the backrest so that the armrest and the backrest are on the same plane.

1 is a perspective view showing a state in which an armrest portion is in a normal position in a medical chair according to a first embodiment of the present invention. FIG. FIG. 2 is a perspective view showing a state in which the left armrest portion is locked at a puncture position in the medical chair according to the first embodiment of the present invention. 1 is a perspective view showing a state in which a left armrest portion is tilted to a position along a backrest portion in a medical chair according to a first embodiment of the present invention. FIG. FIG. 2 is a perspective view showing a medical chair according to the first embodiment of the present invention in a bed state in which the backrest is reclined and the leg rest is lifted up. 1 is a view of the medical chair according to the first embodiment of the present invention, showing a bed state in which the backrest is reclined and the leg rest is raised, as viewed from the left side. FIG. 1 is a view of the left armrest portion in the puncture position as viewed from the right side in the medical chair according to the first embodiment of the present invention. FIG. 1A is a diagram showing the trajectory of the left armrest portion, and the positional relationships between the normal position, the puncture position, and the position along the backrest portion in the medical chair according to the first embodiment of the present invention. FIG. 1 is a view of the left armrest portion in the medical chair according to the first embodiment of the present invention, viewed from the left side, in the puncture position. FIG. FIG. 11 is a perspective view showing a state in which the left armrest portion is locked in the puncture position in a medical chair according to a second embodiment of the present invention. FIG. 11 is a front view showing a state in which the left armrest portion is locked at the puncture position in a medical chair according to a second embodiment of the present invention.

Hereinafter, a medical chair according to this embodiment will be described with reference to the drawings.
As shown in FIG. 1 , the medical chair 1 according to the first embodiment (hereinafter, the medical chair according to the first embodiment will be referred to as the chair) will be described with the X direction being the front-rear direction, the Y direction being the left-right direction, and the Z direction being the up-down direction.

As shown in Figure 1, chair 1 is used to perform artificial dialysis on a patient. Chair 1 is equipped with a base 2 having legs 2A, a seat 3 arranged on top of base 2 to support the buttocks and thighs of the patient, a backrest 4 arranged behind seat 3 to support the upper body of the patient, a pair of left and right armrests 6 connected to backrest 4 that can be tilted upward, and a legrest 9 arranged hanging down in front of seat 3 and on which the legs of the patient are placed.

As shown in Figures 1 to 4, the base 2 is a housing formed in a substantially quadrangular pyramid shape, with legs 2A protruding downward from the four corners of the lower part. The base 2 has a seat 3, which is substantially rectangular in plan view, fixed to the entire surface of the base 2 except for the rear end of the upper part, and a backrest 4 is connected to the rear end of the upper part. In other words, the base 2 supports the seat 3 and backrest 4 from below, and is configured as a part that supports the weight of the chair 1 and the weight of the person being treated who is seated on the chair 1.

As shown in Figures 1 to 4, the seat 3 is fixed to the top of the base 2, and is a generally rectangular part in plan view, with the top entirely covered with a thick elastic material, with the vertical direction being the thickness direction. The seat 3 is the part on which the person to be treated sits, and is configured to support the buttocks and thighs of the person to be treated.

As shown in Figs. 1 to 4, the backrest 4 is disposed behind the seat 3, and its lower end is connected to the base 2. It is formed as a vertically long, approximately rectangular plate in front view, with the thickness direction being the front-to-rear direction. The backrest 4 supports the upper body of the person to be treated, from the waist to the head, seated on the seat 3, and its surface is covered with a thick elastic material, similar to the seat 3.

As shown in FIG. 4, the backrest 4 is configured so that it can be tilted backward with its lower end connected to the base 2 as a fulcrum. That is, the base 2 and the backrest 4 of the chair 1 are connected with a reclining mechanism (not shown), and as shown in FIGS. 4 and 5, the backrest 4 can be reclined until it is flush with the seat 3. Therefore, the chair 1 allows the patient to rest his or her upper body against the inclined backrest 4, and can also be used as a bed by reclining the backrest 4 until it is flush with the seat 3.

Furthermore, as shown in Figs. 1 to 4, the backrest portion 4 is provided with a headrest portion 4A that supports the neck and head of the person being treated when the person rests their upper body against it. The headrest portion 4A is formed by projecting from the surface of the back support surface 4B of the backrest portion 4. The headrest portion 4A is formed so that both ends in the left-right direction are raised and the center portion is recessed, and functions as a pillow when the chair 1 is in bed state, as shown in Figs. 4 and 5.

As shown in FIG. 1, the armrest portion 6 is connected to the lower portion of the backrest portion side surface 4C, which is the left-right side surface of the backrest portion 4, and is formed approximately horizontally facing forward. The armrest portion 6 is composed of a pair of left armrest portion 6A and right armrest portion 6B, which are symmetrical on the left and right. The upper surface of the armrest portion 6, like the seat portion 3 and the backrest portion 4, is covered with a thick elastic material, and the arm of the person receiving treatment is placed on the upper surface covered with this elastic material.

As shown in FIG. 1, the armrest 6 is in a normal position when it is in a substantially horizontal state. By lifting the tip 7 of the armrest 6 from this normal position, the armrest 6 can be tilted (rotated) to a position along the backrest 4, with the rear side of the armrest 6 where the backrest 4 and the armrest 6 are connected as a fulcrum (FIG. 3 is a perspective view showing the state where the left armrest 6A is tilted to a position along the backrest 4). Specifically, taking the left armrest 6A shown in FIG. 6 as an example, the armrest 6 has a rotating shaft 5 provided inside its housing, and is connected to the backrest 4 via this rotating shaft 5. The armrest 6 can be tilted (rotated) to a position along the backrest 4, with this rotating shaft 5 as a fulcrum.

Furthermore, as shown in FIG. 2, the armrest portion 6 can be locked at a puncture position, which is a position inclined at a predetermined angle between the normal position and a position along the backrest portion 4 (FIG. 7 is a diagram showing the trajectory of tilt (rotation) in the left armrest portion 6A, and the respective positional relationships between the normal position, the puncture position, and the position along the backrest portion 4). Specifically, the armrest portion 6 is provided with a locking mechanism (not shown) that includes a locking piece (not shown) formed on the rotating shaft 5 and a swinging piece (not shown) that is locked to the locking piece, that is, a so-called ratchet mechanism, inside the housing. This locking mechanism can lock the armrest portion 6 at a puncture position inclined at a predetermined angle. Note that since the locking mechanism is a so-called ratchet mechanism, when the armrest portion 6 is tilted (rotated) from the normal position to a position along the backrest portion 4, it can be tilted (rotated) smoothly without being locked at the puncture position.

In addition, inside the housing, the armrest portion 6 is provided with a tilt angle control rod (not shown) formed on the rotating shaft 5, and a protrusion (not shown) that is provided on the tilt track of this tilt angle control rod and comes into contact with the tilt angle control rod when the armrest portion 6 is in the normal position or in a position along the backrest portion 4. Therefore, the armrest portion 6 can be locked (stationary) in both the normal position and the position along the backrest portion 4 by locking the tilt angle control rod and the protrusion together.

Furthermore, as shown in FIG. 1, the front side of the upper surface of the armrest portion 6 is formed as a plane that is inclined downward toward the front, based on the normal position. On the other hand, the rear side of the upper surface is formed as a substantially horizontal plane. The inclined plane on the front side of the upper surface is the puncture placement surface 8A, and the substantially horizontal plane on the rear side of the upper surface is the normal placement surface 8B. These puncture placement surface 8A and normal placement surface 8B are smoothly connected near the center of the upper surface of the armrest portion 6 in the front-to-rear direction. That is, the upper surface of the armrest portion 6 is formed in a substantially V-shape in side view by the puncture placement surface 8A and the normal placement surface 8B that are formed at different angles to each other, as in the left armrest portion 6A shown in FIG. 6 and FIG. 8.

As shown in Figs. 1 to 3, the rear end of the puncture mounting surface 8A is formed in a generally V-shape with the center extending rearward in a plan view, and the front end of the normal mounting surface 8B is cut out to have a generally V-shape with both left and right ends extending forward in a plan view. In other words, the rear end of the puncture mounting surface 8A and the front end of the normal mounting surface 8B are connected by interlocking their generally V-shapes in a plan view.

As shown in FIG. 2, the puncture support surface 8A is configured as a plane that is approximately horizontal when the armrest portion 6 is in the puncture position tilted at a predetermined angle (FIGS. 6 and 8 show the state in which the puncture support surface 8A is approximately horizontal with the left armrest portion 6A in the puncture position). That is, in the chair 1, the patient can place their arm on the normal support surface 8B when the armrest portion 6 is in the normal position, and on the puncture support surface 8A when the armrest portion 6 is in the puncture position.

The position where the puncture support surface 8A is formed in the armrest portion 6, the inclination angle of the puncture support surface 8A, and the specified angle as the puncture position are all adjusted to each other and are determined taking into consideration the burden on the patient who places his/her arm on the puncture support surface 8A and the height position that makes it easy for the practitioner to perform the puncture procedure.

Furthermore, as shown by way of example in the left armrest portion 6A in Figs. 3 and 8, the armrest portion 6 is provided with an unlocking portion 10 on the underside of the tip portion 7 for unlocking the armrest portion 6 that is locked at the puncture position. Specifically, the unlocking portion 10 is formed on the underside of the tip portion 7 of the armrest portion 6 as a portion that protrudes from the inside of the armrest portion 6 to the outside and can be pushed inwardly into the armrest portion 6. When the unlocking portion 10 is pushed inwardly into the armrest portion 6 in the armrest portion 6 that is locked at the puncture position, the locked state of the armrest portion 6 is released.

The mechanism by which the armrest portion 6 is released from its locked state is that a link mechanism (not shown) is provided inside the housing of the armrest portion 6, one end of which is connected to the unlocking portion 10, and the other end of this link mechanism is connected to a swinging piece of the locking mechanism provided around the rotation shaft 5 described above. When the unlocking portion 10 is pushed up into the armrest portion 6, the link mechanism is pushed and moved, and the swinging piece swings in conjunction with the pushing of the link mechanism, and disengages from the locking piece, thereby releasing the locked state of the armrest portion 6.

As shown in Figs. 1 to 3, the leg rest 9 is arranged hanging down in front of the seat 3 and is composed of a calf rest 9A, which is a plate-like, approximately inverted trapezoid when viewed from the front with the thickness direction being the front-rear direction, and a heel rest 9B, which is a plate-like, approximately rectangular shape folded behind the calf rest 9A, as shown in Figs. 4 and 5. As shown in Figs. 4 and 5, the calf rest 9A and heel rest 9B are supported by a flip-up mechanism 2B extending from the base 2. Therefore, the leg rest 9 can place the calf of the person seated on the seat 3 on the calf rest surface 9C, which is the front surface of the calf rest 9A, by operating the flip-up mechanism 2B, for example, and tilting the lower part of the calf rest 9A forward with the upper end of the calf rest 9A as a fulcrum.

Also, for example, as shown in Figures 4 and 5, by operating the flip-up mechanism 2B to flip up the calf rest 9A and protrude the heel rest 9B from the back side of the calf rest 9A, the seat 3, calf rest 9A, and heel rest 9B can be placed on the same plane. Therefore, by further reclining the backrest 4 onto the same plane as the seat 3, the chair 1 can be placed in a bed state. This allows the patient to place their calf and heel on the calf rest surface 9C and the upper surface of the heel rest 9B.

The calf placement surface 9C of the calf placement portion 9A is covered with a thick elastic material, similar to the seat portion 3 and backrest portion 4. The front end of the seat portion 3 and the upper end of the calf placement surface 9C are connected and covered with this elastic material. Therefore, the person seated on the seat portion 3 can place the area from the thigh to the calf on the seat portion 3 and the calf placement surface 9C without feeling any discomfort.

Chair 1 is constructed as described above.

Next, we will explain the effect of Chair 1.

As described above, the chair 1 includes a seat 3 on which the subject sits, a backrest 4 that supports the upper body of the subject, and an armrest 6 on which the subject's arm is placed. When the armrest 6 is lifted from its normal position, which is approximately horizontal, to a puncture position inclined at a predetermined angle with the rotation axis 5 as a fulcrum, a flat puncture placement surface 8A that is approximately horizontal is formed on the front side of the upper surface. In other words, by simply tilting the armrest 6 to the puncture position and placing the arm on the puncture placement surface 8A, the elbow of the subject is extended, allowing the practitioner to perform the puncture procedure quickly. Even when the armrest 6 is inclined at the puncture position, the subject can stably place his or her arm on the puncture placement surface 8A. Furthermore, even when the chairs 1 are arranged side by side with no space between them, the practitioner can easily adjust the inclination angle of the armrest 6 by simply lifting the tip 7 with one hand from the front of the chair 1.

Furthermore, with the chair 1, the armrest portion 6 itself is not raised or lowered, but rather, the armrest portion 6 can be adjusted to a height suitable for puncture simply by lifting the tip portion 7 and tilting the armrest portion 6. Therefore, the practitioner can easily adjust the height suitable for puncture with one hand. Also, the practitioner does not need to put down the puncture instrument he is holding in his hand, and can perform the puncture procedure quickly.

In addition, in the chair 1, a normal placement surface 8B on which the arm can be placed is formed on the rear side of the upper surface of the armrest portion 6, and the normal placement surface 8B and the puncture placement surface 8A are connected. That is, in the chair 1, when the armrest portion 6 is in the normal position, the patient can stably place the arm on the normal placement surface 8B with the elbow bent. In addition, since the normal placement surface 8B and the puncture placement surface 8A are connected, the patient can smoothly move the arm between the normal placement surface 8B and the puncture placement surface 8A when the armrest portion 6 is adjusted from the normal position to the puncture position and from the puncture position to the normal position. Therefore, even if the arm is placed on the upper surface of the armrest portion 6, the practitioner can adjust the inclination angle of the armrest portion 6 before and after puncture without putting a burden on the patient.

Furthermore, chair 1 has a puncture placement surface 8A formed on the front side of the upper surface of armrest portion 6, and a normal placement surface 8B formed on the rear side of the upper surface of armrest portion 6. That is, when armrest portion 6 is in the puncture position in chair 1, puncture placement surface 8A is higher than normal placement surface 8B, so that the arm of the patient placed on puncture placement surface 8A is placed at a higher position than when placed on normal placement surface 8B. Therefore, the patient's elbow is naturally extended and the arm is positioned suitable for puncturing, making it easier for the practitioner to perform the puncture procedure and allowing the procedure to be performed quickly.

In addition, in chair 1, armrest portion 6 can be locked at the puncture position, and an unlocking portion 10 is provided on the underside of armrest portion 6, i.e., the underside of tip portion 7. Therefore, in chair 1, even if the armrest portions are arranged side by side with no space between them, armrest portion 6 can be easily locked at the puncture position with one hand from the front of chair 1. In addition, the practitioner can operate unlocking portion 10 provided on the underside of tip portion 7 while supporting tip portion 7 with one hand from the front of chair 1. Therefore, in chair 1, the practitioner can easily lock and release armrest portion 6 at the puncture position with one hand.

In addition, in the chair 1, the unlocking section 10 is provided on the underside of the tip portion 7, which prevents the patient from accidentally touching the unlocking section 10 and accidentally releasing the locked state of the armrest portion 6. In addition, the unlocking section 10 is easy to operate even when the therapist is supporting the tip portion 7 with one hand.

In addition, when the armrest portion 6 of the chair 1 is returned from the puncture position to the normal position, the lock release portion 10 is operated to release the locked state. In other words, in the chair 1, the armrest portion 6 in the puncture position is not accidentally released from the locked state, and the patient can stably place his or her arm on the puncture support surface 8A.

Furthermore, in the chair 1, the armrest portion 6 can be tilted from the normal position past the puncture position toward the backrest portion 4, and when passing the puncture position from the normal position, it is tilted without being locked. That is, in the chair 1, when the armrest portion 6 is tilted from the normal position past the puncture position toward the backrest portion 4, it can be tilted smoothly. Therefore, for example, the armrest portion 6 can be easily tilted to a position along the backrest portion 4 so that a patient who needs to slide sideways from a wheelchair or the like can easily sit down. Even in the chair 1 in which the backrest portion 4 is reclined and put into a bed state, the armrest portion 6 can be tilted to a position along the backrest portion 4 so that the armrest portion 6 and the backrest portion 4 are on the same plane. This allows the seat portion 3, the backrest portion 4, the leg rest portion 9, and the armrest portion 6 to all be on the same plane. This allows the patient to be easily moved to a carrying bed such as a stretcher in an emergency.

As shown in Figures 4 and 5, even if the armrests 6 are left stationary in the normal position, the chair 1 can be placed in a bed state (where the backrest 4 is folded down to be flush with the seat 3 and the legrest 9 is raised to be flush with the seat 3) so that the seat 3, backrest 4, legrest 9 and armrest 6 are all on the same plane. Even in this state, the patient can be easily moved to a transport bed such as a stretcher in an emergency.

The above explains the effects of Chair 1.

Next, as shown in Figures 9 and 10, a medical chair 20 according to a second embodiment (hereinafter, the "medical chair according to the second embodiment" will be referred to as the "chair") will be described. As shown in Figure 9, the X direction of the chair 20 will be described as the front-rear direction, the Y direction as the left-right direction, and the Z direction as the up-down direction. Also, as shown in Figures 9 and 10, in the chair 20, components that correspond to the same configuration as the chair 1 will be given the same reference numerals, and detailed descriptions of those components will be omitted, with the configuration different from the chair 1 being mainly described.

As shown in FIG. 9, chair 20 has a base 2, a seat 3, a backrest 4, an armrest 6, and a legrest 9. Each component of chair 20 has a function that is essentially the same as each component of chair 1.

On the other hand, as shown in FIG. 9, a puncture placement surface 21A different from that of the chair 1 is formed on the upper surface of the armrest portion 6 of the chair 20. Specifically, the puncture placement surface 21A is formed from near the center of the armrest portion 6 in the front-rear direction to the front, and is a plane that is approximately horizontal when the armrest portion 6 is in the puncture position, similar to the puncture placement surface 8A of the chair 1. However, unlike the puncture placement surface 8A, the puncture placement surface 21A is formed such that both left and right ends protrude upward and the center in the left-right direction is recessed downward. That is, the puncture placement surface 21A is recessed downward in the center in the left-right direction along the longitudinal direction of the armrest portion 6. Therefore, as shown in FIG. 10, the puncture placement surface 21A is formed in a roughly eaves gutter shape with the center recessed downward in a front view in the left armrest portion 6A engaged in the puncture position. This allows the patient to place their arm on the depression in the puncture support surface 21A in the chair 20, making it more stable for the patient to place their arm on the puncture support surface 21A.

Furthermore, like chair 1, the upper surface of armrest portion 6 of chair 20 is formed with flat normal placement surface 21B that is approximately horizontal when armrest portion 6 is in the normal position. This normal placement surface 21B and puncture placement surface 21A are connected, and the front end of normal placement surface 21B and the rear end of puncture placement surface 21A are connected in a generally V-shape in plan view, similar to chair 1.

Furthermore, in chair 20, the thickness of the elastic material covering the upper surface of armrest portion 6 is made thinner than that of chair 1. That is, in chair 20, the upper surface of armrest portion 6 on which puncture placement surface 21A and normal placement surface 21B are formed is made thinner than that of chair 1.

The chair 20 is constructed as described above.

Next, the effects of chair 20 will be described. Note that the effects of chair 20 that are the same as those of chair 1 will not be described.

As described above, in the chair 20, the puncture support surface 21A is recessed along the longitudinal direction of the armrest portion 6. In other words, in the chair 20, the arm can be placed in the roughly eaves-gutter-shaped recess of the puncture support surface 21A on the upper surface of the armrest portion 6 that is engaged at the puncture position, allowing the patient to place their arm more stably.

In addition, in chair 20, the upper surface of armrest portion 6 on which puncture placement surface 21A and normal placement surface 21B are formed is formed thinner than chair 1. That is, in chair 20, the elastic material covering the upper surface of armrest portion 6 is formed thinner, so that the weight of armrest portion 6 itself is lighter than chair 1, and the practitioner can easily lift tip portion 7 of armrest portion 6. Therefore, the practitioner can perform the puncture procedure quickly.

The above explains the effects of chair 20.

Although chair 1 and chair 20 have been described in detail above as this embodiment, the present invention is not limited to this embodiment, and various design modifications can be made without departing from the scope of the claims.

For example, in the chair 1 and chair 20 according to this embodiment, an embodiment is shown in which a puncture placement surface 8A or a puncture placement surface 21A is formed on the front side of the upper surface of the armrest portion 6, and a normal placement surface 8B or a normal placement surface 21B is formed on the rear side of the upper surface, but this is not limited to this, and the puncture placement surface and the normal placement surface may be formed side by side on the left and right. Also, a puncture placement surface may be formed in the center in the left-right direction, and normal placement surfaces may be formed on both the left and right ends of that.

In addition, for example, in the chair 1 and chair 20 according to this embodiment, an embodiment in which a normal placement surface 8B or a normal placement surface 21B is formed on the upper surface of the armrest portion 6 has been shown, but a normal placement surface does not have to be formed on the upper surface of the armrest portion. Even if a normal placement surface is formed, the puncture placement surface and the normal placement surface do not have to be connected.

In addition, for example, in the chair 1 and chair 20 according to this embodiment, an embodiment in which the armrest portion 6 is connected to the backrest portion 4 is shown, but this is not limited to this, and the armrest portion may be connected to a base or seat portion other than the backrest portion, etc.

Furthermore, for example, in the chair 1 and chair 20 according to the present embodiment, a locking mechanism and a link mechanism are provided inside the housing of the armrest portion 6, and these configurations enable the armrest portion 6 to be locked and unlocked, but the present invention is not limited to this, and any configuration that enables the armrest portion to be locked and unlocked may be used, such as a configuration that is controlled by an air or hydraulic cylinder, etc.

In addition, for example, chair 1 and chair 20 according to this embodiment are shown as having an inclination angle control rod and a protrusion inside the housing of armrest portion 6, but this is not limited to this, and other configurations are also possible as long as they are capable of limiting the inclination angle of the armrest portion and engaging the armrest portion.

Furthermore, for example, in the chair 1 and chair 20 according to this embodiment, an embodiment has been shown in which the inclination angle of the armrest portion 6 is limited between the normal position and the position along the backrest portion 4, but this is not limited, and the inclination angle that is limited can be any angle.

In addition, for example, in the chair 1 and chair 20 according to the present embodiment, an embodiment is shown in which the tip portion 7 is provided with an unlocking portion 10 that unlocks the locked state of the armrest portion 6, but this is not limited to this, and the chair may not have an unlocking portion, or the unlocking portion may be provided on the base or seat portion other than the armrest portion.

Furthermore, for example, in the chair 1 and chair 20 according to this embodiment, an embodiment in which the lock-release portion 10 is provided on the underside of the tip portion 7 is shown, but this is not limited thereto, and the lock-release portion may be provided on the left or right side surface or the top surface of the tip portion.

In addition, for example, in the chair 1 and chair 20 according to the present embodiment, an embodiment has been shown in which the unlocking unit 10 is operated to release the locked state of the armrest portion 6 that is locked at least at the puncture position, but this is not limited to this, and the configuration may be such that in addition to releasing the locked state at the puncture position, the unlocking unit is operated when releasing the locked state at each of the normal position and the position along the backrest portion.

Furthermore, for example, in the chair 1 and chair 20 according to this embodiment, an embodiment is shown that includes a reclining mechanism in the backrest section 4 and a flip-up mechanism 2B in the leg rest section 9, but this is not limited to this, and a medical chair may be one that does not include a reclining mechanism or a flip-up mechanism, and the leg rest section itself may or may not be provided.

1 Chair (medical chair according to the first embodiment)
2 Base 2A Leg 2B Flip-up mechanism 3 Seat 4 Backrest 4A Headrest 4B Back support surface 4C Side surface of backrest 5 Rotation shaft 6 Armrest 6A Left armrest 6B Right armrest 7 Tip 8A Lancing surface (first embodiment)
8B Normal placement surface (first embodiment)
9 Leg rest portion 9A Calf placement portion 9B Heel placement portion 9C Calf placement surface 10 Unlocking portion 20 Chair (medical chair according to the second embodiment)
21A Puncture placement surface (second embodiment)
21B Normal placement surface (second embodiment)

Claims (6)

The device includes a seat on which the person to be treated sits, a backrest that supports the upper body of the person to be treated, and an armrest on which the arms of the person to be treated are placed.
When the armrest portion is in a puncture position where a tip portion that is a tip of the armrest portion is raised from a normal horizontal position and tilted at a predetermined angle around a rotation axis as a fulcrum, at least a part of the front side of the upper surface forms a puncture support surface on which the arm can be placed , and the armrest portion can be locked at the puncture position, and an unlocking portion that releases the locked state of the armrest portion is provided near the tip portion,
The unlocking portion is provided on the underside of the armrest portion.
A medical chair characterized by: The device includes a seat on which the person to be treated sits, a backrest that supports the upper body of the person to be treated, and an armrest on which the arms of the person to be treated are placed.
When the armrest portion is in a puncture position where a tip portion that is the tip of the armrest portion is lifted from a normal horizontal position and tilted at a predetermined angle around a rotation axis as a fulcrum, a puncture support surface on which the arm can be placed is formed in at least a part of the front side of the upper surface, and the armrest portion can be locked in the puncture position. An unlocking portion that releases the locked state of the armrest portion is provided near the tip portion, and the unlocking portion is operated to release the locked state at least when the armrest portion is returned to the normal position from the puncture position.
A medical chair characterized by: The device includes a seat on which the person to be treated sits, a backrest that supports the upper body of the person to be treated, and an armrest on which the arms of the person to be treated are placed.
When the armrest portion is in a puncture position where a tip portion that is the tip of the armrest portion is lifted from a normal horizontal position and tilted at a predetermined angle around a rotation axis as a fulcrum, a puncture support surface on which the arm can be placed is formed in at least a part of the front side of the upper surface, and the armrest portion can be locked at the puncture position. An unlocking portion that releases the locked state of the armrest portion is provided near the tip portion, the armrest portion can be tilted from the normal position past the puncture position toward the backrest portion, and when the armrest portion passes the puncture position from the normal position, it tilts without being locked.
A medical chair characterized by: a normal placement surface on which the arm can be placed is formed on an upper surface of the armrest portion in the normal position, and the normal placement surface and the puncture placement surface are connected to each other;
A medical chair according to any one of claims 1 to 3. The normal placement surface is formed on the rear side of the upper surface of the armrest portion.
5. The medical chair according to claim 4 . The puncture support surface is recessed along the longitudinal direction of the armrest portion.
A medical chair according to any one of claims 1 to 5.

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