JP2008154703A - Elevating chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair which is an elevating legless chair capable of elevating operation of a seat part and lowering the seat part to rise and fall with a small motor driving force and capable of assisting a senior citizen or a physically handicapped person in sitting down almost without bending the knees when standing up or sitting down by allowing the seat part to become higher or lower alone with switch operation at hand. <P>SOLUTION: In the elevating legless chair in which a seat part 9 can rise and fall by link of a link mechanism 2 and a link mechanism 3, a pulley 7B and a driving pulley 3D are simultaneously operated in order to raise the seat part, power of a valid pulley is used according to positions of the link 2 and the link 3 to suppress fluctuations of an elevating force generated by the driving force in an initial and later periods. Thus, when rising, since a tilting board 5 tilts, the seat part 9 tilts when a user stands up and sits down and so allows him or her to sit down even when the knees are little bent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates mainly to an electric lift chair, and more particularly to a seat height adjustment structure for a chair that can adjust the height of the seat according to the purpose of use such as a chair or a chair.

  Conventionally, various seat structures such as chairs and chairs have been proposed, but there are many things in which the height of the seat cannot be adjusted. Examples of structures that can adjust the height of the seat include a gas spring type structure and a structure in which the seat chair itself is lifted or lowered by an elevator at the back of the backrest.

  There are individual differences in the body shape of individual users, and it is necessary to adjust the height of the seat according to individual differences such as the height of each user, especially the length of the feet, in order to obtain a comfortable feeling of use. There is. In addition, with regard to seat chairs etc., it is difficult for the elderly to sit down on the seat chair and bend to the end and sit down on the seat. It becomes very easy to sit down if the height and inclination of the seat are lowered and lowered horizontally after leaning on the seat that has been tilted.

  In addition, when you stand up, the seat is automatically lifted with a power source such as a motor to a height that makes it easy to stand up with a single switch operation at your fingertips. It becomes easy. As for the assisting actions for standing and sitting for these elderly people and people with physical disabilities, it is impossible for a chair with a gas spring type structure, and for only the upper and lower ones, it is difficult to flex the knee It is impossible for the person.

However, even with this method, a minimum thickness of about 110 mm is required for the thickness up to the seating portion. There is a method to use it as it is, but the motor becomes larger and the device becomes larger.
JP 2005-205127 A Noto 3096277 gazette

  The problem to be solved is that the drive input that becomes an obstacle in the drive operation cannot be reduced and lowered.

  The present invention is an apparatus made in view of various problems in order to solve the above problems. Two X-axis link mechanisms are installed in the lower part of the seat portion of the chair, and the X-axis link mechanism is driven by moving power applied to the X-axis link mechanism by the drive pulley 3D and the link drive shaft 7. The main feature of the chair is that the upper part of each link mechanism is a seat, and the height of the seat can be freely adjusted by opening and closing the X-axis link. .

  The lift chair of the present invention is easy to adjust the height of the sitting height according to the body shape of the individual user by referring to a normal chair or a chair by the above means, and the elderly and the disabled. It is possible to sit on the seat even if it is difficult to bend to the end, such as a person who has difficulty in walking, especially those who have difficulty in walking, and can be lowered to the height of the seat When standing, raise the seat to the top with the hand control unit, and tilt the seat diagonally, and then start up from a state where it can stand up easily. .

  The purpose of inputting the driving force from a position as close to the floor as possible with a total of two X-axis link mechanisms was achieved with the minimum number of parts and without increasing the power.

  FIG. 1 is a cross-sectional view of an embodiment of the apparatus of the present invention, and the reference numerals 1 to 9 are the same as those in FIG. Reference numeral 10 denotes a motor, which has a speed reduction mechanism, and is connected to 11 pulley units and can be raised and lowered by an external operation.

  The wire 8 is connected to the pulley apparatus 11 so that the wire can be taken in and out. Since the main body of the present invention is the mounting method of the mechanical system using the two links, the description of the electronic and electrical systems is omitted.

  As shown in FIG. 8, the 2 links are installed on the lift chair base 2 at the position of the fixed rotating shaft 2A, and the link 2B, the pulley 2B2, and the link 3 are connected by the 2B1 bolt as shown in FIG. Each is fastened with rotation. 8 showed inserting in this space with a wire.

  In FIG. 1, there are four upper frames above the three links, and the fixed rotation shaft of 3A is installed at the position shown in the figure. As shown, the 2C2 collar and the 2C4 set collar have 2 links, 2C3 wheels, and 2C1 link wheels rotatably mounted, and the upper frame of the 4 is kept in that position in FIG. It moves up and down following the height position of the 2C moving rotation shaft by tilting the link.

  In addition, as shown in FIG. 7, 3 links and 3C1 link wheels are rotatably installed below the 3 links by 3C moving connecting shafts.

  As shown in FIG. 6, 7 shown in FIG. 1 is a link drive shaft, which is integrated with a gear wheel of 7C, and has a 7A wheel and a 7B pulley rotatably, 7C gear wheel is in contact, 3 link and 7A wheel are in contact at the same time, 7C gear wheel is meshed with 2F fixed rack teeth provided in 2 link and rotated by 7 link drive shaft When the wire of 8 is put in the groove of the pulley of 7B and the pulley device of 11 shown in FIG. 1 is raised, and the wire of 8 is pulled, the link of 2 and the link of 3 are obtained. When the upper frame of 4 is raised and the pulling force is applied by pulling 8 wires, the 2 links and 3 links are shown in FIG. The contact surface shown in FIG. 6 is closed and the upper frame of 4 is lowered. There. In addition, the cover of 2E is provided with a long hole as shown in FIG. 1 to prevent the wire from being removed from the wire 8 and to move the 7C gear wheel cover as well as to move the 7 link drive shaft.

  The 3D shown in FIG. 1 is a drive pulley, and as shown in FIG. 7, it is rotatably installed on 3 links by 3D1 bolts, and 8 wires are put on the groove of the 3D drive pulley and 8 on the motor side. When the wire is pulled, the link of 3 is pulled, and the upper frame of 4 shown in FIG. 1 is raised. When the pulling force is pulled by applying the wire of 8, the upper part of the moving connecting shaft of 3C shown in FIG. Since the three links open and return to the original position at the position shown in FIG. 2 with a certain influence weight and influence load, the upper frame of the four is lowered.

  In the embodiment of FIG. 1, the 2D wire end fitting is rotatably installed on the link 2, and from here, the wire 8 extends over the groove of the pulley 7 </ b> B shown in FIG. 6 and is shown in FIG. 7. In the groove of the 3D drive pulley, pass through the lower side of the fixed rotating shaft of 2A, reach the pulley device of 11 and exit to the opposite side as shown in FIG. 3, and connect the links 2 and 3 on the opposite side in the same way It is connected to the 2D wire end mounting bracket position on the opposite side.

  The inclined plate 5 shown in FIG. 1 is a base on which 9 seats are installed at the top, and the tilting fixed shaft 4A has 51 inclined plates rotatably installed therein as shown in FIG. The 5B1 wheel is fitted on the side of the 51 inclined plate and is fixed to the upper frame.

  The cam plate 6 shown in FIG. 1 is integrated with the rotation shaft 4B, and a 5B wheel is provided at the upper end, and the wheel is fitted on the side of the inclined plate 5.

  The lower end of the cam plate 6 shown in FIG. 1 is in contact with the 2C3 wheel rotatably installed on the movable connecting shaft 2C shown in FIG. Tilt.

  When the position of the 2C moving connecting shaft shown in FIG. 1 has reached the position of 2C5 from the position of 2C shown in FIG. 4, the cam plate of 6 becomes the position of the cam plate of 61 and simultaneously the inclined plate of 5 Tilt to 51 tilting plate position, 9 seating position becomes 91 seating position position, 5 comes into contact with 4 upper frame and stops, 2C5 moving connecting shaft position comes to 2C6 position Even so, the cam plate 61 remains as it is.

  As described above, when the link 2 in FIG. 1 tilts to the right about the fixed rotation axis 2A, the upper frame 4 descends, while the inclined plate 5 moves to the left about the tilt fixed axis indicated by 4A. 4 to stop at the position of the inclined plate 51 in FIG. 4 on the upper surface of the upper frame of 4, and the upper frame of 4 further descends to reach FIG. 2.

  As shown in FIG. 2, when the motor of 10 is driven and the pulley device of 11 is raised, the wire of 8 is pulled and the force acts on the 3D drive pulley, but the force that lifts the seat of 9 is about 1/12. Only the force is generated and the weight is below the influence weight and influence load above the 3C moving connecting shaft, but it is stopped, but the 8 wires hanging from the 2D wire end fitting to the groove of the 3D driving pulley that is stopped If the pulley of 7B shown in FIG. 4 is pulled to the connecting shaft side of 2B by about twice the force when pulled by the motor, and the output is larger than the influence weight and the influence load above the connecting shaft of 2B, It is possible to raise the 4 upper frame on which 9 seats are installed.

  However, the rising force decreases as the links 2 and 3 open and the upper frame 4 rises. However, the rising force decreases as the upper frame of the 3D drive pulley rises. The rising force that is generated increases, so at first it rises with a light force by the 7B pulley, and after a while, the force decreases, but the force of the 3D driving pulley is added and the upper frame of 4 rises It becomes.

  This reduces the fluctuation of the ascending force, which is a drawback of the link mechanism. As a result, the motor output can be reduced.

  Even if the link is lowered extremely, it can be driven with a small force, so that a low seating portion can be achieved with a lifting chair and a motor with a small driving force can be provided.

It is explanatory drawing which showed the implementation method at the time of raising / lowering a chair. It is explanatory drawing which showed the implementation method at the time of a raising / lowering chair descent | fall. It is XX cross-sectional explanatory drawing of FIG. It is explanatory drawing at the time of 5 inclination board downward movement of FIG. FIG. 5 is an explanatory diagram of a Z-Z cross section in FIG. 4. It is a cross-sectional explanatory view of the 7-link drive shaft of FIG. It is a cross-sectional explanatory drawing of the 3C movement connection shaft of FIG. It is a cross-sectional explanatory drawing of the 2B connecting shaft of FIG. It is a cross-sectional explanatory drawing of the 2C movement connection shaft of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting chair base 2 Link 2A Fixed rotating shaft 2B Connecting shaft 2B1 Bolt 2B2 Pulley 2C Moving connecting shaft 2C1 Link wheel 2C2 Collar 2C3 Wheel 2C4 Set collar 2C5 Moving connecting shaft 2C6 Moving connecting shaft 2D Wire end fitting 2F Fixed rack 2E Cover 3 Link 3A Fixed rotating shaft 3C Moving connecting shaft 3C1 Link wheel 3D Drive pulley 3D1 Bolt 4 Upper frame 4A Tilt fixed shaft 4B Rotating shaft 5 Inclined plate 51 Inclined plate 5B Wheel 5B1 Wheel 6 Cam plate 61 Cam plate 7 Link driving shaft 7A Wheel 7B pulley 7C gear wheel 8 wire 9 seating portion 91 seating portion 10 motor 11 pulley device

Claims (3)

  In a lifting / lowering chair configured so that the seating portion can be raised and lowered by a link mechanism, a wire, a belt, or a chain that acts to exert a traction force on two affected portions of the link mechanism in order to raise the seating portion is installed. When the seating part is in a range from the lowest part to at least a predetermined height, one of the action parts of the drive wire or belt with respect to the actuated part acts, and the other one follows and moves up to a predetermined height. If it becomes above, another one of the action parts with respect to the above-mentioned to-be-acted part will act automatically, and it is constituted so that it can drive from a lower position by switching action and follow-up. Lifting mechanism.   An elevating seat chair using the link mechanism according to claim 1, wherein a seat portion is installed on the upper part of the link mechanism and can be raised and lowered in a horizontal state.   Using the link mechanism of claim 1, a seat and a cam are installed on the upper surface of the link mechanism, and the upper end of the link mechanism is used to cause the seat to tilt by acting on the cam. A lift chair that can be lifted up and down and tilted.

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