JP2011120669A - Chair for medical examination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem associated with a conventional chair for medical examination that although a doctor can carry out a medical interview, a medical examination and a treatment without moving a patient, a backrest supporting the back of the patient becomes an obstacle when the doctor tries to perform auscultation, ocular inspection, and percussion of the back of the patient because the backrest is fixed to the chair. <P>SOLUTION: The chair for the medical examination comprises: a vertically movable seat part 3; a backrest 5 which has a backrest raising means storable within the lower part of the back of the seat part and rises and falls in accordance with rising and lowering of the seat part; and a leg rest 7 which rises and falls in accordance with rising and lowering of the seat part. The chair shifts its states among a state where the backrest is stored within the lower part of the back of the seat part, a chair state where the backrest is raised by the backrest raising means, and a bed state where the seat is raised while the backrest and the leg rest are laid flat. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chair for a patient to be seated when performing an inquiry or treatment in a hospital or clinic, and relates to a medical examination chair capable of adjusting the height of rotation and backrest.

  Conventionally, when receiving medical care at a hospital or clinic, a patient sits in a round chair without a backrest in the examination room and receives an examination of the chest and back by a medical examination, a stethoscope, a doctor's palpation and percussion. When necessary, he undressed and lay down on a fixed bed installed behind him to perform medical examinations and treatments.

  By the way, since the chair on which the patient is seated is a round chair, when the patient receives an inquiry or a medical examination, the round chair is rotated for medical examination. In addition, when the inquiry and examination in the round chair are completed and the examination and treatment at the bed are shifted, the patient needs to move to the bed, or after the examination is completed, the patient must move off the bed. There was a problem of putting a burden on the elderly and the disabled.

  As a means to solve such problems, the backrest of the chair and the legrest are changed into a bed shape at the time of examination and treatment, eliminating the need for troublesome movement of the patient, and safe and easy examination even for the elderly Or receive treatment. Focusing on this point, the present applicant has developed a technique disclosed in Japanese Patent Application Laid-Open No. 2009-6023.

  The present invention forms a backrest and a legrest so that it can be raised and lowered, makes it easy to get on and off the chair as a chair state at the time of an inquiry, and makes the backrest and legrest move to a horizontal state at the time of medical examination and treatment. By doing so, the patient is put into a laid state without moving from the chair to the bed as in the prior art, so that the troublesome movement of the patient is eliminated and the medical examination and treatment can be performed.

JP 2009-6023 A

  By the way, in the above-described invention of Patent Document 1, it is possible to perform examination and treatment from an inquiry even if the patient does not move. However, since the backrest is fixed in the chair state, When trying to perform auscultation, inspection, and percussion of the back, there was a problem that the backrest that supported the patient's back could not be performed.

  The present invention is intended to solve the above-described problems, and the purpose of the present invention is to set the height at which a patient can easily get on and off at the time of introduction of the patient, so even an elderly person can get on and off the chair. It is easy and the backrest is retractable so that the chair can be rotated while the backrest is stored in the lower back of the seat, and the height of the backrest is lowered to allow auscultation, visual inspection, and percussion of the back. A medical examination chair that can be changed from a chair state to a bed state without being moved even when the patient is in a supine state in order to perform medical treatment or treatment of the patient in more detail. There is to offer.

  The medical examination chair according to the present invention achieves the above-mentioned purpose, and the means of claim 1 includes a seat part that can be raised and lowered, and a backrest raising and lowering means that can be accommodated in the lower rear part of the seat part, and A backrest that rises and falls as the seat rises and lowers, and a legrest that rises and lowers as the seat rises and lowers, and the backrest is accommodated in a lower rear portion of the seat, and the backrest is The chair state is raised by a backrest raising / lowering means, and the seat is raised and the backrest and legrest are laid down to change into a bed state.

  The means of claim 2 comprises a backrest support base having a lower end fixed to a base installed on the floor, a backrest base pivotally supported on the upper end of the backrest support base, A backrest that is raised and lowered by a backrest raising / lowering means with respect to the backrest base, a seat portion on which an upright piece formed on a seat substrate is pivotally supported with the backrest base, and the seat portion. A hydraulic cylinder for ascending and descending, a legrest pivotally supported on the front end side of the seat portion, a pivot link pivotally supported on one end on the backrest support base, and pivoting on the legrest It is characterized by comprising a leg rest link supported freely.

  According to a third aspect of the present invention, the backrest raising / lowering means has a backrest having a guide rod that is slidable with respect to a backrest base that acts as a fixing member attached to the seat portion so as to be raised and lowered. A frame, a vertical motion plate slidably attached to the guide rod at a lower portion of the backrest base, a cylinder side attached to the vertical motion plate, and a ram side attached to the upper side of the frame A hydraulic cylinder, a pulley attached to the up-and-down moving plate, and a wire having one end attached to the upper side of the frame, the middle wound around the pulley, and the other end attached to the backrest base It is characterized by comprising.

  According to a fourth aspect of the present invention, in the above-described first or second aspect, the backrest raising / lowering means is slidable with respect to a backrest base that acts as a fixing member attached to the seat portion so as to be raised and lowered. A backrest frame body having a guide rod, and an assist means attached to the backrest support base so as to be movable up and down, a first pulley attached to the assist means, and the backrest base side A second pulley attached to the back and one end fixed to the backrest base side, wound around the first pulley and then wound around the second pulley and the other end fixed to the frame body side It is comprised from a wire, The force of the said assist means was made into the force which can take the balance with the said frame.

  According to a fifth aspect of the present invention, in the above-described fourth aspect, the frame body is fixed to the backrest base by a lock mechanism by an operation from the outside, and the frame body even if an unexpected external force is applied in this fixed state. This is characterized in that the up and down movement is not performed.

  In the present invention, as described above, the backrest is accommodated in the lower rear portion of the seat by the backrest raising / lowering means, the chair state in which the backrest is raised by the backrest raising / lowering means, and the seat rises. With the backrest and legrest lying down, it is possible to change to a bed state, so that the patient's back can be auscultated, inspected, and consulted while the backrest is housed in the lower back of the seat. The patient can be interrogated, inspected, and consulted, and the patient can be moved to the bed as in the past by placing the patient in the seated state from the backrest-contained state or chair state. Can be examined and treated without any problems.

  Further, the backrest raising / lowering means is constituted by a hydraulic cylinder so that the frame body is raised and lowered relative to the backrest base on the fixing member side, and is housed in the lower rear part of the seat portion at the lowest lowered position. Since the chair is in the raised position, it can be changed between the patient's back diagnosis state and the chair state simply by operating the switch for raising and lowering the back with a foot or hand, and one end is fixed to the frame side and the other end Is wound around the pulley fixed to the vertical moving plate that moves up and down in conjunction with the frame body in the middle of the wire fixed to the fixed member side, so that the frame body is twice the contraction amount of the hydraulic cylinder Therefore, it is possible to reduce the size of the backrest raising / lowering means.

  Further, a frame body that is supported so that the backrest raising / lowering means can be raised and lowered with respect to the fixed member side is attached with a weight that moves about twice as much weight as the frame body, and a first pulley is attached to this weight, The second pulley is attached to the fixing member side, and a wire having one end fixed to the fixing member side and the other end fixed to the frame body side is wound between the first and second pulleys. Even if the weight and weight are balanced and the frame is moved up and down by hand, it can be done easily without feeling the load, and the movement amount of the weight is halved relative to the movement amount of the backrest. The drooping / lowering means can be reduced in size and can be easily accommodated on the back side of the backrest.

  Also, the frame body is fixed to the backrest base by a lock mechanism by an external operation, and the patient sitting in this fixed state moves or the doctor moves the frame up and down. However, since the vertical movement of the frame is not performed, the frame can be prevented from moving downward particularly in the chair state, or the frame can be prevented from moving toward the seat in the bed state. Therefore, it has an effect that the patient can be treated in a safe state.

It is a perspective view of the initial state of the medical examination chair of this invention. It is a front view of FIG. It is the sectional view on the AA line of FIG. 2, and has shown only the principal part. It is the rear view which looked at the backrest of FIG. 3 from the back surface side. It is the whole perspective view seen from the front side. It is the whole perspective view seen from the back side. It is the whole perspective view seen from the lower part. It is a front view of the state which lowered the backrest to the middle. It is the BB sectional drawing of FIG. It is the rear view which looked at the backrest of FIG. 9 from the back surface side. It is a front view of the state which lowered the backrest to the lowest lowered position. It is CC sectional view taken on the line of FIG. 11, and has shown only the principal figure. It is the rear view seen from the backrest back surface side of FIG. It is the perspective view made into the bed state. It is the perspective view seen from the back surface side of FIG. It is sectional drawing seen from the side surface of FIG. It is an Example in the case of raising / lowering the backrest in this invention manually, and is a back perspective view which has a frame in the highest position. It is a side view of FIG. It is a back perspective view in the state where the frame started to descend. FIG. 20 is a side view of FIG. 19. It is a back perspective view in which a frame is in the lowest lowered position. It is a side view of FIG. It is a side view which shows the principal part in which the frame for demonstrating manual raising / lowering exists in the highest position. It is a side view which shows the principal part in the lowest position. It is sectional drawing which shows the locking mechanism of a frame.

Hereinafter, an embodiment of a medical examination chair according to the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a base fixed to a floor surface in a medical room of a hospital or a clinic, and a disk portion 1 a is rotatably attached to the base 1. 2 is a hydraulic cylinder in which the cylinder side is pivotally supported by the disc portion 1a, and the ram side is pivotally supported by the seat portion substrate 3a on the back surface of the seat portion 3, and 4 is fixed at the lower end to the disc portion 1a and the upper end is backrest. 5 is a pair of left and right back support bases that are rotatably supported by a shaft 41 with respect to the back support base 5a. Hereinafter, the rotation fulcrum by the shaft 41 is referred to as an axis point a.

  A standing piece 3b is formed on the rear upper surface of the seat portion 3, and the standing piece 3b and a protruding piece 5b protruding forward from the backrest base 5a are supported by a shaft 3d. Hereinafter, the rotation fulcrum by the shaft 3d is referred to as a shaft point b. Accordingly, when the seat portion 3 is raised, the backrest 5 is pushed up by the rising piece 5b of the backrest 5 through the protruding piece 3b of the seat portion 3, so that the backrest base 5a and the backrest support base 4 are pivoted. It is turned in the prone direction by a.

  In addition, a triangular seat base 3c is attached to the back surface of the seat substrate 3a of the seat 3, and a U-shape is provided between the lower end of the seat base 3c and the backrest support base 4. A pivoting link 6 is pivotally supported.

  Reference numeral 7 denotes a legrest in which the upper end of the legrest substrate 7a is pivotally supported in front of the seat substrate 3a. One end of the legrest substrate 7a is pivotally supported by the pivot link 6 above the legrest substrate 7a. The other end of the leg rest link 7b is pivotally supported.

  On the back side of the legrest 7, a footrest 8 is pivotally supported at the other end of a pair of parallel links 8a and 8b, one end of which is pivotally supported in front of the seat substrate 3a. When the legrest link 7b is moved forward via the pivot link 6, the legrest 7 is moved in the forward direction by the parallel links 8a and 8b. The footrest 8 also moves horizontally and finally becomes flush with the legrest 7 and the seat 3.

  The backrest 5 described above is configured to be able to move up and down. That is, there is a problem that when the patient is seated, if the backrest is at a high position, a feeling of intimidation or pressure is felt, and the backrest 5 interferes with auscultation, visual inspection, and percussion on the patient's back side. Therefore, the above problem can be solved by lowering the backrest 5.

  In this embodiment, the state in which the backrest 5 shown in FIGS. 11 to 13 is in the lowest position is the initial state, but the height of the backrest 5 other than the bed state where a doctor or the like can easily perform a treatment is set to any height position. It is good also as an initial state. In addition, let the position which raised the backrest 5 to the highest position be a chair state.

Next, the backrest raising / lowering means for raising / lowering the backrest 5 is demonstrated.
The pair of backrest bases 5a are integrated by a link bar 5c. The backrest 5 is composed of a frame body 51, and a pair of left and right guide collars 52 that are inserted through guide holes opened in the backrest base 5 a are attached to the frame body 51. A back cushion 51 a is attached to the front surface of the frame 51.

  A vertical moving plate 53 guided by the guide rod 52 is supported between the lower side of the frame 51 to which the guide rod 52 is attached and the backrest base 5a. The cylinder side of the hydraulic cylinder 54 is pivotally supported on the moving plate 53, and the ram side is supported on the upper side of the frame 51.

  Further, a tension spring 55 is stretched between the vertical moving plate 53 and the upper side portion of the frame 51. A pulley 56 is rotatably attached to the left and right ends of the vertical moving plate 53. A wire 57 having one end attached to the upper side of the frame 51 and the other end attached to the backrest base 5a is wound around the pulley 56. Reference numeral 54a denotes a tube for supplying and discharging oil to the hydraulic cylinder 54.

  Reference numeral 9 denotes a headrest attached to the upper side of the frame 51, which is formed so as to be able to change between a standing state and a rearward lying state on the upper side of the frame 51 by known means and is locked at least in the standing state. It is made possible.

  10 and 11 are joystick-type foot switches that are mounted on the base side and control the same function by stepping on or pushing up the foot, and for example, if the lever is operated upward with the tip of the foot, the backrest 5 is raised, If the lever is operated downward, the backrest 5 is lowered. Further, if the lever is operated rightward, the initial state or chair state is shifted to the bed state (preset operation). Transition to the chair state (automatic return operation).

The two foot switches that perform the same operation are arranged when the doctor's dominant foot is different or the doctor's moving position at the time of examination. This is because a difficult situation may occur.
In the illustrated embodiment, a joystick-type foot switch is shown as a switch. However, the above-described back-and-forth movement of the backrest, preset or auto-return is placed on a foot switch that is placed on the floor and is stepped on with a foot. It may be operated by providing an operation button such as a joystick type foot switch may be arranged manually on the back side of the backrest 5 or on the side surface of an armrest 12 to be described later. It is not limited to a joystick type.

  Reference numeral 12 denotes an armrest for putting on an elbow when the patient is seated, preventing the patient from falling in a bed state, or concealing the internal structure to improve the appearance.

Next, the operation that is the first examination form will be described.
This first examination form is the state in which the frame 51 which is the initial state is in the lowest lowered position (lower back of the chair), and the patient sits down and performs medical examinations such as interviews and visual examinations / consultations facing the doctor. Then, the seat 3 is rotated by, for example, 90 degrees with respect to the base 1 or the doctor moves to perform auscultation, inspection, percussion, etc. on the patient's back. Then, when the doctor who performed the examination ends, the seated patient is withdrawn. Further, when the doctor determines that a medical examination in the supine state is necessary, the lever of the foot switch 10 or 11 is operated (preset) in the right direction to set the bed state. When the medical treatment in the bed state is completed, the lever of the foot switch 10 or 11 is operated leftward (auto return) to return to the original initial state.

Next, the transition operation from the position where the frame 51 is lowered to the bed state will be described.
When the preset operation is performed in the initial state of FIGS. 11 to 13, first, oil is supplied to the hydraulic cylinder 54, and the frame body 51 rises while being guided by the guide rod 52 against the spring force of the spring 55. Start. At this time, the vertical moving plate 53 to which the cylinder side of the hydraulic cylinder 54 is attached also rises, so that the wire 57 stretched between the upper side of the frame 51 and the backrest base 5a via a pulley, The rising speed of the frame 51 is twice the extension speed of the hydraulic cylinder.

  Finally, the vertical motion plate 53 rises to a position above the axis b, so that the frame body 51 moves upward by the extent that the hydraulic cylinder 54 extends from the initial height position 2. The double displacement amount moves upward and the frame body 51 is in the highest position and becomes a chair state.

  From this chair state, oil is supplied to the hydraulic cylinder 2 and the ram rises to raise the seat portion 3. As the seat portion 3 rises, the seat base 3c attached to the back surface of the seat portion 3 rises, and as a result, the pivot link 6 supports the shaft portion with the backrest support stand 4 as a fulcrum. The leg rest link 7b, which is pivoted clockwise as one end and pivotally supported at one end thereof, pivots clockwise (horizontal direction) using the leg rest 7 as a fulcrum with the leg rest 7 as a fulcrum. Moved. Then, when the legrest 7 is shifted in the horizontal direction, the footrest 8 starts to rise while maintaining the horizontal state by the parallel links 8a and 8b.

  On the other hand, when the seat part 3 rises, the protruding piece 5b extended from the backrest base 5a in the backrest 5 connected to the upright piece 3b attached to the seat substrate 3a is pushed up. Here, since the backrest base 5 a is pivotally supported at the backrest support 4 and the axis point “a”, the backrest 5 changes in the horizontal direction as the seat portion 3 rises.

  The leg rest 7 and the backrest 5 are moved in the horizontal direction as the seat portion 3 is moved up to be in a bed state. As a means for stopping the transition to the horizontal state, for example, the rotation link 6 The displacement amount is detected by the potentiometer 13 via the link 13a, and when the potentiometer 13 detects a preset resistance value, the supply of oil to the hydraulic cylinder 2 is stopped, whereby the beds shown in FIGS. It becomes a state. And a medical examination is performed in this bed state.

  On the other hand, in the transition from the bed state to the initial state, the lever of the foot switch 10 or 11 is operated to the left (automatic return), thereby opening the cylinder of the hydraulic cylinder 2 and allowing the oil to be discharged. In this state, the ram of the hydraulic cylinder 2 is lowered by the weight of the patient, the seat portion 3, the backrest 5, the legrest 7, and the footrest 8, so that the chair state is restored by the operation opposite to the above-described operation. Also at this time, the change in the resistance value of the potentiometer 13 is detected, and when this resistance value is detected in advance, the discharge of oil from the hydraulic cylinder 2 is stopped to return to the chair state.

  Then, after returning to the chair state, the oil discharged by opening the hydraulic cylinder 54 is started via the tube 54a, so that the frame 51 starts to descend, and finally the lowermost part at the rear lower part of the seat portion. Housed in the lowered position. When the frame 51 is lowered, the vertical moving plate 53 is also lowered, so that the frame 51 is lowered by the wire 57 stretched between the upper side of the frame 51 and the backrest base 5a via a pulley. The speed is twice the contraction speed of the hydraulic cylinder.

  Finally, since the vertical motion plate 53 descends to a position below the axis b, the frame 51 moves downward by the amount that the hydraulic cylinder 54 contracts from the height position of the chair state. The frame 51 is moved to the lowest position by the double amount of displacement and is in the initial state. In this state, the patient can leave the examination chair.

Next, the operation which is the second examination form will be described.
With this second examination form, the interview and consultation with the doctor in the initial state are completed, and then after the examination of the patient's back is completed, the frame 51 is raised to the chair state and again It is an operation to make a bed state after conducting an inquiry / examination.

  In order to change from the initial state to the chair state, when the lever of the foot switch 10 or 11 is pushed up, oil is supplied to the hydraulic cylinder 54, and the ram of the hydraulic cylinder 54 is raised by the supply of this oil. The frame body 51 is raised by an operation opposite to the operation of lowering the frame body 51 described above, and finally the frame body 51 stops at the highest position and enters a chair state. And in this chair state, it becomes possible to perform a medical examination and a medical examination again in the face-to-face state with a doctor. Then, the patient is withdrawn in this chair state.

  In the chair state, when the doctor determines that further examination in the supine state is necessary, the foot switch 10 or 11 is operated (preset) in the right direction to set the bed state. That is, when the preset operation is performed, the operation of raising the seat portion 3 by starting to supply the oil to the hydraulic cylinder 2 and raising the ram is started. Therefore, the same operation as the transition from the chair state to the bed state is performed. It becomes a bed state. And a medical examination is performed in this bed state. After the examination in the bed state is completed, the same operation as described in the first examination form is performed to return to the initial state and leave the patient.

Next, the operation that is the third examination form will be described.
In this third examination form, the chair state in which the frame 51 is raised to the highest position is the initial state. Then, in this chair state, face the doctor and conduct an inquiry and medical examination, then store the frame 51 in the lower back of the chair to examine the patient's back, and return the frame 51 to the highest position again. After the chair state is set, the preset operation described above is performed to shift to the bed state.

  When the lever of the foot switch 10 or 11 is pushed down in the chair state, the hydraulic cylinder 54 is opened and oil can be discharged. When the oil in the hydraulic cylinder 54 can be discharged, the hydraulic cylinder 54 contracts with the help of the spring force of the tension spring 55, and the guide rod 52 is guided to the backrest base 5a while the entire backrest is guided. The frame 51 starts to descend due to the weight.

  Further, when the hydraulic cylinder 54 contracts, the vertical moving plate 53 to which the cylinder side of the hydraulic cylinder 54 is attached is also lowered, but a pulley 56 is interposed between the upper side portion of the frame 51 and the backrest base 5a. The lowering speed of the frame 51 is doubled with respect to the contraction speed of the hydraulic cylinder 54 by the wire 57 stretched.

  And finally, the up-and-down moving plate 53 descends to a position below the upright piece 3b and is in a state of being accommodated in the lower rear portion of the seat. Accordingly, the frame body 51 of the backrest 5 moves downward by an amount twice as much as the vertical moving plate 53 moves downward by the contraction of the hydraulic cylinder 54 from the initial height position. It will be in the state which fell to the height which can examine the back side of the patient who is seated through the movement of 8-10 (refer FIGS. 11-13).

  When the patient's back is examined in a state where the frame 51 is housed in the lower rear part of the seat, and then the lever of the foot switch 10 or 11 is operated upward, the operation described in the second examination operation described above is performed. The frame 51 rises to a chair state. Then, the patient is withdrawn in this chair state. And when a doctor judges that the medical examination in a supine state is required, preset operation will be carried out and it will be in a bed state.

  When this preset operation is performed, the oil is supplied to the hydraulic cylinder 2 and the operation of raising the ram and raising the seat portion 3 is started. Therefore, the bed is moved by the same operation as the transition from the chair state to the bed state. It becomes a state. And a medical examination is performed in this bed state. After the examination in the bed state is completed, the auto return operation is performed to return to the chair state, and the patient is left in this state.

Next, the operation that is the fourth examination form will be described.
In the third examination form described above, in-person interviews and examinations with a doctor in a chair state are performed, then the frame 51 is lowered to examine the patient's back, and then the frame 51 is raised. Return to the chair state, when the doctor interviews and consults with the patient, and when a medical examination is required in the supine position, the operation is to move to the bed state. This is an operation of shifting to the bed state without returning to the chair state after lowering the frame 51 in the third examination state.

  Since the operation from the chair state described in the above-described third examination form to the examination of the patient's back by lowering the frame 51 is the same operation, the description is omitted. Then, the transition from the state to the bed state when the doctor determines that a medical examination in the supine posture is necessary will be described.

  In the transition to the bed state, when the preset operation is performed by operating the lever of the foot switch 10 or 11 in the right direction, the frame 51 is raised to the chair state by the operation described in the first examination form described above. After the transition, the seat portion 3 rises, and the backrest 5, the leg rest 7 and the footrest 8 are flush with the seat portion 3 and shift to the bed state. Then, the patient is examined in this bed state. After the examination in the bed state is completed, the same operation as described in the first examination form is performed to return to the chair state, so that the patient is withdrawn in this state.

  In addition to the above-described medical examination forms, other medical examination forms may be conceived depending on doctors' preferred medical examination forms or patient examination contents. Further, as means for locking or releasing the rotation state of the seat portion 3, a known foot pedal placed on the floor surface provided separately from the foot switches 10 and 11 may be used. By operating the lever of the switch 10 or 11 downward, the rotation state of the seat portion 3 may be locked so that it can be rotated when stepped downward again. In this case, the frame 51 of the backrest 5 can be lowered by a foot pedal or by performing an automatic return operation of the foot switches 10 and 11.

  Furthermore, in the above-described embodiment, the rotation of the seat portion 3 by the extension of the hydraulic cylinder 2 causes the rotation link 6 to rotate, and this rotation causes the leg rest 7 to move horizontally through the leg rest link 7b. The backrest 5 is changed in the horizontal direction by shifting the upright piece 3b attached to the seat portion 3 and the protruding piece 5b supported by the shaft, but the legrest link 7b is changed. One end of the leg rest 7b may be pivotally supported on the projecting piece 5b side, and the leg rest link 7b may cause the leg rest 7 to move in the horizontal direction as the projecting piece 5b changes as the seat portion 3 moves up.

  The backrest raising / lowering means in the above-described embodiment causes the backrest 5 to be lifted / lowered by the hydraulic cylinder 54. In the following, an embodiment in which a doctor or nurse manually raises / lowers the backrest is shown in FIGS. This will be described with reference to FIG. The same reference numerals as those in the above-described embodiment denote the same members, and the description thereof is omitted.

  In this embodiment, a weight guide rod 58 is fixed in the central vertical direction of the pair of left and right backrest support bases 4, and the weight 12 is slidably attached to the weight guide rod 58. A first pulley 12 a is rotatably supported above the weight 12.

  A U-shaped guide bar 51b is attached to the back side of the frame 51, and a guide receiver (not shown) for guiding the guide bar 51b is formed on the backrest base 5a. Therefore, the frame 51 can be moved up and down by the guide bar 51b and the guide receiver.

  A fixed plate 5d is attached to the backrest base 5a, and a second pulley 5e is attached to the back surface of the fixed plate 5d. Then, as shown in FIGS. 23 and 24, the wire 57 having one end fixed to the fixing plate 5d (see FIGS. 17, 19, and 21) on the fixing side of the backrest base 5a is wound around the first pulley 12a. The wire 57 wound around the first pulley 12a is wound around the second pulley 5e, and then fixed to the lower portion of the frame 51 that moves up and down. 17 to 22 omit the illustration of the wire 57 in order to simplify the drawing. The two pulleys 12a and 5e for balancing the frame 51, the wire 57, and the weight 12 constitute an assist means.

  Here, the weight of the weight 12 with respect to the weight of the frame 51 is set to approximately twice the weight so that the wire 57 is wound around the two pulleys 12a and 5e, so that the weight balance is substantially zero. Thus, when the frame 51 is moved up and down manually, it is possible to perform the up and down operation with almost no load. For example, when the weight of the frame 51 is 5 kg, the weight of the weight 12 is set to 10 kg.

  13 covers a gap formed between the lower part of the frame 51 and the rear of the seat 3 when the frame 51 is raised, and the patient's clothes are placed between the lower part of the backrest 5 and the rear of the seat 3. As a sub backrest for preventing pinching, the sub backrest 13 is attached to the end of a parallel link 59 a having one end attached to the lower side plate 59 of the frame 51.

  Next, doctors and nurses will manually explain the lifting and lowering operation of the frame 51. First, from the state where the frame 51 shown in FIGS. 17 and 18 is at the highest position, auscultation / inspection / consultation of the patient's back is performed. In order to lower the frame 51 to perform the operation, the weight of the weight 12 is about twice the weight of the frame 51 when the doctor or nurse pushes down the upper portion of the frame 51. Since the weight balance between the frame 51 and the weight 12 is substantially zero, the frame body 51 and the weight 12 can be lowered easily without abrupt lowering. Since the wire 57 is wound by winding the two pulleys 12a and 5e, the frame 51 is lowered with a stroke twice the moving amount of the weight 12.

  Further, when the frame body 51 is in the raised position, the sub backrest 13 is in a state of being hung down by the parallel link 59a due to the weight of the sub backrest 13, and therefore, the lower portion of the frame body 51 is in the sub backrest. 13 and the gap with the seat 3 is closed.

  As the frame 51 descends, the weight rises via the wire 57 (see FIGS. 19 and 20), and finally the frame 51 descends to the lowest lowered position as shown in FIGS. From the position before the lowest position, the sub backrest 13 abuts against a stopper (not shown) and moves forward through the parallel link 59a, and the frame body 51 is smoothly lowered. It is possible to perform auscultation / inspection / percussion by lowering the frame 51 from the back of the patient at the lowest position of the frame 51.

  Next, in order to raise the frame 51 in the lowered position, when the doctor or nurse holds the upper part of the frame 51 and pulls it up, the frame 51 can be pulled up by an operation opposite to the above-described operation. At this time, since the weight balance is substantially zero as described above, the frame body 51 can be pulled up without feeling a load.

  Since the two pulleys 12a and 5e and the wire 57 are wound around this pulley, the amount of movement of the weight is halved with respect to the amount of movement of the frame 51, so the back-lifting means is compact. In addition, the frame 51 can be moved up and down with a double stroke.

  Further, as the frame body 51 is raised, the sub backrest 13 is separated from the stopper, so that the weight of the sub backrest 13 is lowered through the parallel link 59a, and the frame body 51 is displaced to the highest position. Thus, the gap between the lower portion of the frame 51 and the seat portion 3 is covered.

  As described above, the frame 51 is in a state in which it can move up and down with almost no load due to the wire 57 being wound around the pulleys 12 a and 5 e and the weight 12. There is a possibility that the frame body 51 moves up or down because the back of the frame body 51 is in contact, or when a doctor or nurse performs an operation of moving the frame body 51 up and down by mistake. Therefore, it is necessary to prevent the frame body 51 from moving up and down at the position where the height position of the frame body 51 is determined.

  In the above-described embodiment, the weight 12 is used as an assist means for balancing the frame 51. However, instead of the weight 12, a gas cylinder may be used. That is, the upper end of the gas spring is attached to the fixed base 5d located above the backrest support base 4, and the lower end is attached to the member supporting the first pulley 12a attached to the guide rod 58. With this configuration, the gas spring always tries to extend, but the upper end is fixed and the lower end is slidable. Therefore, the member supporting the first pulley 12a is pushed down, and the weight 12 The same effect as using can be obtained.

Hereinafter, an example of the lock mechanism 14 for locking the frame body 51 at the determined position will be described.
This locking mechanism 14 is disclosed in the headrest device (Japanese Unexamined Patent Publication No. 2000-270959) for a barber / beauty chair filed by the present applicant, and the outline thereof will be described below. The headrest device of the chair is a device that locks the headrest at a position where the headrest is manually moved up and down. The lock device is locked at a position where the frame body 51 of the present invention is moved up and down. It is applied to do.

  Next, the disclosed locking mechanism 14 will be described with reference to FIG. 25. Reference numeral 141 denotes a guide pipe attached to an attachment piece 51b fixed to the lower inside of the frame body 51. A slide pipe 142 is inserted into the guide pipe 141, and a slide piece 142 is slidable with respect to the guide pipe 141 by a guide piece 141 a fixed to the guide pipe 141 and a fulcrum plate 142 a fixed to the slide pipe 142.

  A mandrel 143 is fixed to a bracket 141b attached to the lower end of the guide pipe 141. And the front-end | tip is penetrated in the hole formed in the fulcrum plate 142a. A clamp chain 144 is fitted to the mandrel 143, the clamp chain 144 is accommodated in the slide pipe 142, one end is supported by the recess 142 b of the slide pipe 142, and the other end is in the slide pipe 142. Is supported in a groove 146a of a slide piece 146 that moves up and down integrally with the operation pipe 145 inserted into the pipe.

  The slide piece 146 is slidably fitted in the slide pipe 142 and engaged with a slider 147 through which a mandrel 143 is inserted, and the slider 147 moves downward from the state shown in FIG. The piece 146 is also moved, and the clamp chain 144 is moved in a direction to compress a spring (not shown) that is biased in the direction in which the clamp chain 144 extends. As a result, the clamp chain 144 is displaced away from the mandrel 143.

  A push knob 148 is attached to the upper end of the operation pipe 145, and a spring 149 is disposed between the push knob 148 and a slide cylinder 142 c fixed to the upper end of the slide pipe 142. The pipe 145 is spring-biased upward.

  The lock mechanism 14 configured in this manner pushes up the lower end of the clamp chain 144 against the spring force of a spring (not shown) of the clamp chain 144 by pulling up the slide piece 146 when the slide pipe 142 is pulled up, As a result, the clamp chain 144 is contracted, the engagement with the mandrel 143 is released, and the slide pipe 142 is raised.

  Since the mandrel 143 is locked by the clamp chain 144 in the descending direction, the slide pipe 142 is locked when the slide pipe 142 is raised and stopped. When the lifting force is lifted and released, the lock is fixed at that position.

  In order to lower the slide pipe 142, when the push knob 148 is pushed against the spring force of the spring 149, the operation pipe 145 is lowered in FIG. As a result, the slider 147 moves downward and the clamp chain 144 and the mandrel 143 are separated from each other. Therefore, the slide pipe 142 is slidable with respect to the guide pipe 141, so that the slide pipe 142 can be lowered. Become.

  The locking mechanism 14 shown in FIGS. 18, 20, and 22 is schematically shown, so refer to FIG. 25 for details of the locking mechanism 14. Further, the locking mechanism is not limited to the above-described embodiment. For example, rack teeth are formed on the guide bar 51b, and the locking teeth that mesh with the rack teeth are attached to the backrest base 5a, and the frame body. The locking teeth are not engaged with the rack teeth when the frame 51 is lowered, and the locking teeth are pulled against the spring force of the spring so that the engagement with the locking teeth can be released when the frame 51 is lowered. It may be.

DESCRIPTION OF SYMBOLS 1 Base 2 Hydraulic cylinder 3 Seat part 4 Backrest support stand 5 Backrest 51 Frame 6 Rotating link 7 Legrest 8 Footrest 9 Headrest 10 Backrest raising / lowering switch 11 Auto switch 12 Armrest

Claims (5)

A seat rest that can be raised and lowered, a backrest that can be accommodated in the lower rear part of the seat, and a backrest that rises and falls as the seat rises and lowers and a legrest that rises and falls as the seat rises and falls And
A state in which the backrest is housed in the lower rear part of the seat, a chair state in which the backrest is raised by the backrest raising / lowering means, and a bed state in which the seat rises and the backrest and legrest are laid down A medical examination chair characterized by being transformed into   With respect to the backrest base, a backrest support base fixed to a base whose lower end is installed on the floor, a backrest base pivotally supported on the upper end of the backrest support base, and A backrest that is raised and lowered by a backrest raising and lowering means; a seat portion on which a standing piece formed on a seat base plate is pivotally supported with the backrest base; and a hydraulic cylinder for raising and lowering the seat portion; A leg rest pivotally supported on the front end side of the seat portion, a pivot link pivotally supported at one end on the back support base, and a leg pivotally supported on the leg rest A medical examination chair characterized by comprising a rest link.   The backrest raising / lowering means includes a backrest frame body having a guide collar that is slidable with respect to a backrest base that acts as a fixing member attached to the seat portion so as to be raised and lowered, and the backrest A vertical moving plate slidably attached to the guide rod at a lower portion of a base; a hydraulic cylinder having a cylinder side attached to the vertical moving plate and a ram side attached to an upper side of the frame; The pulley is attached to the moving plate, and one end is attached to the upper side of the frame, the middle is wound around the pulley, and the other end is attached to the backrest base. The medical examination chair according to claim 1 or 2.   The backrest raising / lowering means includes a backrest frame body having a guide collar that is slidable with respect to a backrest base that acts as a fixing member attached to the seat portion so as to be raised and lowered, and the backrest Assist means attached to the support base so as to be movable up and down, a first pulley attached to the assist means, a second pulley attached to the backrest base, and one end of the backrest base A wire fixed to the base side, wound around the first pulley and then wound around the second pulley, the other end being fixed to the frame body side, and the force of the assist means and the frame body The medical examination chair according to claim 1, wherein the medical examination chair has a power to balance the above.   The frame body is fixed to the backrest base by a lock mechanism by an external operation, and the vertical movement of the frame body is not performed even if an unexpected external force is applied in this fixed state. The medical examination chair according to claim 4.

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