JP2009160356A - Nonstep angle adjusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and lightweight nonstep angle adjusting device. <P>SOLUTION: The nonstep angle adjusting device includes a fixed part 1, a tilting part 2 pivoted at the fixed part 1, a wedge 3 held between the tilting part 2 and the fixed part 1, and a guide for restraining the motion of the wedge 3 in the direction crossing a surface perpendicular to the rotational axis of the tilting part 2. The wedge 3 is moved to the left or right by floating the tilting part 2 forward. When the wedge 3 is moved to other positions, the angle k of the tilting part 2 is changed relative to a horizontal line. A liner made of a soft elastic material is attached to the wedge 3 or the wedge-abutting surface of the guide. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus capable of adjusting an angle steplessly.

Technical background

  A structure using a gas spring or an electric motor is generally used as a structure capable of adjusting the angle steplessly.

Problems to be solved by the invention

  Gas springs are devices that can adjust the angle steplessly. After adjusting the angle, this device locks the angle with the force of the gas spring. The electric motor type adjusts the angle by driving the electric motor. Both are expensive and have a short service life due to their weight. The present invention has been invented in view of the above.

  In order to achieve the above-mentioned object, the angle stepless adjusting device of the present invention is configured so that the movement of the wedge and the wedge sandwiched between the fixed portion, the tilting portion pivotally supported by the fixed portion and the fixed portion is rotated. The stepless angle adjusting device is composed of a guide that regulates in a direction crossing a plane perpendicular to the vertical direction.

  A soft elastic material liner is mounted on the contact surface of the wedge or guide or guide groove.

(Embodiment 1 of the invention)

  1-5 is a figure which shows the bed concerning the Example of this invention, and demonstrates with reference to these figures below.

  In FIG. 1, 1 is a fixing part, 2 is a tilting part, and 3 is a wedge. The slope of the contract is 4, the lower end of the slope is 4a, and the upper end of the slope is 4b. 5 is a hole for restricting the movement range, 6 is a seat plate, and 7 is a screw for position restriction. 8 is a seat cushion and 9 is a back cushion.

    FIG. 2 is a perspective view of the appearance of the chair.

  In FIG. 3, when an excessive weight F <b> 1 is applied to the tilting portion 2, a force F <b> 2 that pushes the trigger in the outer direction is generated in the contract 3, and the contract is about to move outward. At the same time, a force f3 in the lower end direction of the groove is generated in the engagement groove 4c by the excessive component force of f1, and a sliding frictional resistance F3a is generated by this force. At the same time, a force f4 in the rear direction of the groove is generated in the engagement groove 4d by the excessive component force of f1, and a sliding frictional resistance F4a is generated. Since both f3a and f4a are in the opposite direction to f2, if the sliding frictional resistance f3a + f4a is larger than f2, the contract remains at that position and the angle of the chair is fixed at this position.

  The sliding friction resistance is generated by a hard rubber fixed to the wall of the groove or the tilting portion 2. If this part is in a smooth state, the sliding frictional resistance is zero, so the force acting on the trigger is only f2, so the trigger shifts to the outside, and the tilting part 2 moves to adjust the angle. I can't. For the sliding friction resistance, the liner 10 fixed to the lower side of the groove and the liner 11 fixed to the back side of the groove play the role.

  In order to move the angle, the tilting part 2 is floated forward, the contract 3 is moved left and right, and when the contract 3 is moved to another position, the tilt part 2 changes its angle k with respect to the horizontal line. In other words, you can choose the angle you want. If an excessive weight is applied to the tilting part 2 at the changed angle, the action of the previous item works and the contract is fixed.

  This stepless adjustment structure cannot be constructed unless f3a + f4a is larger than f2. Therefore, it is important to increase f3a and f4a. What influences this is the material to which the contacting groove is fixed, the area of the contacting groove, and the angle between 4 and the horizontal line.

  As the liner material, a hard rubber tile is effective, and the sliding friction resistance can be increased as the contact area is increased. (3x10x100mm rubber tile). The frictional resistance can be increased as the area of the contacting groove increases. The friction resistance can be increased as the angle between the line 4 and the horizontal line is lower.

This stepless adjustment device is subject to wear only at the portion where the trigger and the tilting portion are in contact. Since the other members have no contacts, the failure rate is much lower than the structure using a gas spring or an electric motor.
The sliding frictional resistance with respect to the movement is different between the lower end and the upper end of the angle. FIG. 4 shows this device when the angle is low and high. The upper side is when the angle is large and the lower side is when the angle is low.

  FIG. 5 shows the magnitudes of the forces f2, f3, and f4 with respect to the magnitude of the back angle. It is necessary to configure the apparatus in consideration of the magnitude of these forces and the degree of frictional resistance.

  In FIG. 6, the contract can be moved left and right, but is meaningless in a range other than 4a to 4b. Therefore, when the screw 7 is fitted into the hole in the fixing portion 1 and the tip of the screw is inserted into the engagement hole 5, the engagement can move only within a certain range. In this structure, there is no useless movement.

  The inclination of the contract can be arbitrarily selected within the range of 4a to 4b. When this is used for a seat chair or the like, the user can obtain a chair whose angle is adjusted steplessly by simply moving the contract to the left or right.

  It is a perspective view which shows Embodiment 1 of this invention.   It is a perspective view which shows Embodiment 1 of this invention.   It is the perspective view which expanded the angle adjustment part.   It is a perspective view in case the angle which shows Embodiment 1 differs.   It is a figure which shows the relationship of force.   It is a perspective view of the part which controls a position in the opportunity.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed part 2 Tilt part 3 Trigger 4 Trigger slope part 4a Trigger slope part lower end 4b Trigger slope part upper end 4c Groove bottom part 4d Groove bottom side 5 Regulating groove 6 Seat plate 7 Screw 8 Seat cushion 9 Back cushion 10 Lower liner 11 Rear liner

Claims (2)

  Stepless consisting of a fixed part and a guide that regulates the movement of the wedge sandwiched between the fixed part and the tilted part and the fixed part in a direction intersecting the plane perpendicular to the rotation axis of the tilted part Angle adjustment device.   2. The stepless angle adjusting device according to claim 1, wherein a liner made of a soft material elastic material is attached to a contact surface of a wedge or a guide or a guide groove.

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